166 files changed, 8146 insertions, 1782 deletions

diff --git a/Documentation/ABI/testing/sysfs-tty b/Documentation/ABI/testing/sysfs-tty
index 0c430150d929..ad22fb0ee765 100644
--- a/Documentation/ABI/testing/sysfs-tty
+++ b/Documentation/ABI/testing/sysfs-tty
@@ -26,3 +26,115 @@ Description:
                  UART port in serial_core, that is bound to TTY like ttyS0.
                  uartclk = 16 * baud_base
 
+                 These sysfs values expose the TIOCGSERIAL interface via
+                 sysfs rather than via ioctls.
+
+What:           /sys/class/tty/ttyS0/type
+Date:           October 2012
+Contact:        Alan Cox <alan@linux.intel.com>
+Description:
+                 Shows the current tty type for this port.
+
+                 These sysfs values expose the TIOCGSERIAL interface via
+                 sysfs rather than via ioctls.
+
+What:           /sys/class/tty/ttyS0/line
+Date:           October 2012
+Contact:        Alan Cox <alan@linux.intel.com>
+Description:
+                 Shows the current tty line number for this port.
+
+                 These sysfs values expose the TIOCGSERIAL interface via
+                 sysfs rather than via ioctls.
+
+What:           /sys/class/tty/ttyS0/port
+Date:           October 2012
+Contact:        Alan Cox <alan@linux.intel.com>
+Description:
+                 Shows the current tty port I/O address for this port.
+
+                 These sysfs values expose the TIOCGSERIAL interface via
+                 sysfs rather than via ioctls.
+
+What:           /sys/class/tty/ttyS0/irq
+Date:           October 2012
+Contact:        Alan Cox <alan@linux.intel.com>
+Description:
+                 Shows the current primary interrupt for this port.
+
+                 These sysfs values expose the TIOCGSERIAL interface via
+                 sysfs rather than via ioctls.
+
+What:           /sys/class/tty/ttyS0/flags
+Date:           October 2012
+Contact:        Alan Cox <alan@linux.intel.com>
+Description:
+                 Show the tty port status flags for this port.
+
+                 These sysfs values expose the TIOCGSERIAL interface via
+                 sysfs rather than via ioctls.
+
+What:           /sys/class/tty/ttyS0/xmit_fifo_size
+Date:           October 2012
+Contact:        Alan Cox <alan@linux.intel.com>
+Description:
+                 Show the transmit FIFO size for this port.
+
+                 These sysfs values expose the TIOCGSERIAL interface via
+                 sysfs rather than via ioctls.
+
+What:           /sys/class/tty/ttyS0/close_delay
+Date:           October 2012
+Contact:        Alan Cox <alan@linux.intel.com>
+Description:
+                 Show the closing delay time for this port in ms.
+
+                 These sysfs values expose the TIOCGSERIAL interface via
+                 sysfs rather than via ioctls.
+
+What:           /sys/class/tty/ttyS0/closing_wait
+Date:           October 2012
+Contact:        Alan Cox <alan@linux.intel.com>
+Description:
+                 Show the close wait time for this port in ms.
+
+                 These sysfs values expose the TIOCGSERIAL interface via
+                 sysfs rather than via ioctls.
+
+What:           /sys/class/tty/ttyS0/custom_divisor
+Date:           October 2012
+Contact:        Alan Cox <alan@linux.intel.com>
+Description:
+                 Show the custom divisor if any that is set on this port.
+
+                 These sysfs values expose the TIOCGSERIAL interface via
+                 sysfs rather than via ioctls.
+
+What:           /sys/class/tty/ttyS0/io_type
+Date:           October 2012
+Contact:        Alan Cox <alan@linux.intel.com>
+Description:
+                 Show the I/O type that is to be used with the iomem base
+                 address.
+
+                 These sysfs values expose the TIOCGSERIAL interface via
+                 sysfs rather than via ioctls.
+
+What:           /sys/class/tty/ttyS0/iomem_base
+Date:           October 2012
+Contact:        Alan Cox <alan@linux.intel.com>
+Description:
+                 The I/O memory base for this port.
+
+                 These sysfs values expose the TIOCGSERIAL interface via
+                 sysfs rather than via ioctls.
+
+What:           /sys/class/tty/ttyS0/iomem_reg_shift
+Date:           October 2012
+Contact:        Alan Cox <alan@linux.intel.com>
+Description:
+                 Show the register shift indicating the spacing to be used
+                 for accesses on this iomem address.
+
+                 These sysfs values expose the TIOCGSERIAL interface via
+                 sysfs rather than via ioctls.
diff --git a/Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt b/Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt
index 2ee903fad25c..273a8d5b3300 100644
--- a/Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt
+++ b/Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt
@@ -6,11 +6,19 @@ Required properties:
 - reg : Address and length of the register set for the device
 - interrupts : Should contain the auart interrupt numbers
 
+Optional properties:
+- fsl,auart-dma-channel : The DMA channels, the first is for RX, the other
+                is for TX. If you add this property, it also means that you
+                will enable the DMA support for the auart.
+                Note: due to the hardware bug in imx23(see errata : 2836),
+                only the imx28 can enable the DMA support for the auart.
+
 Example:
 auart0: serial@8006a000 {
         compatible = "fsl,imx28-auart", "fsl,imx23-auart";
         reg = <0x8006a000 0x2000>;
         interrupts = <112 70 71>;
+        fsl,auart-dma-channel = <8 9>;
 };
 
 Note: Each auart port should have an alias correctly numbered in "aliases"
diff --git a/Documentation/devicetree/bindings/tty/serial/of-serial.txt b/Documentation/devicetree/bindings/tty/serial/of-serial.txt
index ba385f2e0ddc..1e1145ca4f3c 100644
--- a/Documentation/devicetree/bindings/tty/serial/of-serial.txt
+++ b/Documentation/devicetree/bindings/tty/serial/of-serial.txt
@@ -14,7 +14,10 @@ Required properties:
         - "serial" if the port type is unknown.
 - reg : offset and length of the register set for the device.
 - interrupts : should contain uart interrupt.
-- clock-frequency : the input clock frequency for the UART.
+- clock-frequency : the input clock frequency for the UART
+         or
+  clocks phandle to refer to the clk used as per Documentation/devicetree
+  /bindings/clock/clock-bindings.txt
 
 Optional properties:
 - current-speed : the current active speed of the UART.
diff --git a/MAINTAINERS b/MAINTAINERS
index 1ea0eba7ee22..b68c3a10006c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7430,6 +7430,7 @@ K:	^Subject:.*(?i)trivial
 
 TTY LAYER
 M:      Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+M:      Jiri Slaby <jslaby@suse.cz>
 S:      Supported
 T:      git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
 F:      drivers/tty/
diff --git a/arch/alpha/include/asm/ioctls.h b/arch/alpha/include/asm/ioctls.h
index 80e1cee90f1f..92c557be49fc 100644
--- a/arch/alpha/include/asm/ioctls.h
+++ b/arch/alpha/include/asm/ioctls.h
@@ -95,6 +95,9 @@
 #define TIOCGDEV        _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
 #define TIOCSIG         _IOW('T',0x36, int)  /* Generate signal on Pty slave */
 #define TIOCVHANGUP     0x5437
+#define TIOCGPKT        _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK      _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL       _IOR('T', 0x40, int) /* Get exclusive mode state */
 
 #define TIOCSERCONFIG   0x5453
 #define TIOCSERGWILD    0x5454
diff --git a/arch/alpha/kernel/srmcons.c b/arch/alpha/kernel/srmcons.c
index 5d5865204a1d..59b7bbad8394 100644
--- a/arch/alpha/kernel/srmcons.c
+++ b/arch/alpha/kernel/srmcons.c
@@ -205,7 +205,6 @@ static const struct tty_operations srmcons_ops = {
 static int __init
 srmcons_init(void)
 {
-        tty_port_init(&srmcons_singleton.port);
         setup_timer(&srmcons_singleton.timer, srmcons_receive_chars,
                         (unsigned long)&srmcons_singleton);
         if (srm_is_registered_console) {
@@ -215,6 +214,9 @@ srmcons_init(void)
                 driver = alloc_tty_driver(MAX_SRM_CONSOLE_DEVICES);
                 if (!driver)
                         return -ENOMEM;
+
+                tty_port_init(&srmcons_singleton.port);
+
                 driver->driver_name = "srm";
                 driver->name = "srm";
                 driver->major = 0;      /* dynamic */
@@ -227,6 +229,7 @@ srmcons_init(void)
                 err = tty_register_driver(driver);
                 if (err) {
                         put_tty_driver(driver);
+                        tty_port_destroy(&srmcons_singleton.port);
                         return err;
                 }
                 srmcons_driver = driver;
diff --git a/arch/arm/boot/dts/imx28.dtsi b/arch/arm/boot/dts/imx28.dtsi
index 55c57ea6169e..b4587b27ae42 100644
--- a/arch/arm/boot/dts/imx28.dtsi
+++ b/arch/arm/boot/dts/imx28.dtsi
@@ -799,6 +799,7 @@
                                 compatible = "fsl,imx28-auart", "fsl,imx23-auart";
                                 reg = <0x8006a000 0x2000>;
                                 interrupts = <112 70 71>;
+                                fsl,auart-dma-channel = <8 9>;
                                 clocks = <&clks 45>;
                                 status = "disabled";
                         };
diff --git a/arch/arm/plat-omap/include/plat/serial.h b/arch/arm/plat-omap/include/plat/serial.h
index 65fce44dce34..b780470d03ea 100644
--- a/arch/arm/plat-omap/include/plat/serial.h
+++ b/arch/arm/plat-omap/include/plat/serial.h
@@ -109,15 +109,6 @@
 #define OMAP5UART4              OMAP4UART4
 #define ZOOM_UART               95              /* Only on zoom2/3 */
 
-/* This is only used by 8250.c for omap1510 */
-#define is_omap_port(pt)        ({int __ret = 0;                        \
-                        if ((pt)->port.mapbase == OMAP1_UART1_BASE ||   \
-                            (pt)->port.mapbase == OMAP1_UART2_BASE ||   \
-                            (pt)->port.mapbase == OMAP1_UART3_BASE)     \
-                                __ret = 1;                              \
-                        __ret;                                          \
-                        })
-
 #ifndef __ASSEMBLER__
 
 struct omap_board_data;
diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c
index ec536e4e36c9..fc3924d18c1f 100644
--- a/arch/ia64/hp/sim/simserial.c
+++ b/arch/ia64/hp/sim/simserial.c
@@ -555,6 +555,7 @@ static int __init simrs_init(void)
         return 0;
 err_free_tty:
         put_tty_driver(hp_simserial_driver);
+        tty_port_destroy(&state->port);
         return retval;
 }
 
diff --git a/arch/m68k/emu/nfcon.c b/arch/m68k/emu/nfcon.c
index 16d170f53bfd..6685bf45c2c3 100644
--- a/arch/m68k/emu/nfcon.c
+++ b/arch/m68k/emu/nfcon.c
@@ -120,8 +120,6 @@ static int __init nfcon_init(void)
 {
         int res;
 
-        tty_port_init(&nfcon_tty_port);
-
         stderr_id = nf_get_id("NF_STDERR");
         if (!stderr_id)
                 return -ENODEV;
@@ -130,6 +128,8 @@ static int __init nfcon_init(void)
         if (!nfcon_tty_driver)
                 return -ENOMEM;
 
+        tty_port_init(&nfcon_tty_port);
+
         nfcon_tty_driver->driver_name = "nfcon";
         nfcon_tty_driver->name = "nfcon";
         nfcon_tty_driver->type = TTY_DRIVER_TYPE_SYSTEM;
@@ -143,6 +143,7 @@ static int __init nfcon_init(void)
         if (res) {
                 pr_err("failed to register nfcon tty driver\n");
                 put_tty_driver(nfcon_tty_driver);
+                tty_port_destroy(&nfcon_tty_port);
                 return res;
         }
 
@@ -157,6 +158,7 @@ static void __exit nfcon_exit(void)
         unregister_console(&nf_console);
         tty_unregister_driver(nfcon_tty_driver);
         put_tty_driver(nfcon_tty_driver);
+        tty_port_destroy(&nfcon_tty_port);
 }
 
 module_init(nfcon_init);
diff --git a/arch/mips/include/uapi/asm/ioctls.h b/arch/mips/include/uapi/asm/ioctls.h
index 92403c3d6007..addd56b60694 100644
--- a/arch/mips/include/uapi/asm/ioctls.h
+++ b/arch/mips/include/uapi/asm/ioctls.h
@@ -86,6 +86,9 @@
 #define TIOCGDEV        _IOR('T', 0x32, unsigned int) /* Get primary device node of /dev/console */
 #define TIOCSIG         _IOW('T', 0x36, int)  /* Generate signal on Pty slave */
 #define TIOCVHANGUP     0x5437
+#define TIOCGPKT        _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK      _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL       _IOR('T', 0x40, int) /* Get exclusive mode state */
 
 /* I hope the range from 0x5480 on is free ... */
 #define TIOCSCTTY       0x5480          /* become controlling tty */
diff --git a/arch/parisc/include/uapi/asm/ioctls.h b/arch/parisc/include/uapi/asm/ioctls.h
index 054ec06f9e23..66719c38a36b 100644
--- a/arch/parisc/include/uapi/asm/ioctls.h
+++ b/arch/parisc/include/uapi/asm/ioctls.h
@@ -55,6 +55,9 @@
 #define TIOCGDEV        _IOR('T',0x32, int)  /* Get primary device node of /dev/console */
 #define TIOCSIG         _IOW('T',0x36, int)  /* Generate signal on Pty slave */
 #define TIOCVHANGUP     0x5437
+#define TIOCGPKT        _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK      _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL       _IOR('T', 0x40, int) /* Get exclusive mode state */
 
 #define FIONCLEX        0x5450  /* these numbers need to be adjusted. */
 #define FIOCLEX         0x5451
diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c
index 88238638aee6..efc5e7d30530 100644
--- a/arch/parisc/kernel/pdc_cons.c
+++ b/arch/parisc/kernel/pdc_cons.c
@@ -186,13 +186,13 @@ static int __init pdc_console_tty_driver_init(void)
         printk(KERN_INFO "The PDC console driver is still registered, removing CON_BOOT flag\n");
         pdc_cons.flags &= ~CON_BOOT;
 
-        tty_port_init(&tty_port);
-
         pdc_console_tty_driver = alloc_tty_driver(1);
 
         if (!pdc_console_tty_driver)
                 return -ENOMEM;
 
+        tty_port_init(&tty_port);
+
         pdc_console_tty_driver->driver_name = "pdc_cons";
         pdc_console_tty_driver->name = "ttyB";
         pdc_console_tty_driver->major = MUX_MAJOR;
@@ -207,6 +207,7 @@ static int __init pdc_console_tty_driver_init(void)
         err = tty_register_driver(pdc_console_tty_driver);
         if (err) {
                 printk(KERN_ERR "Unable to register the PDC console TTY driver\n");
+                tty_port_destroy(&tty_port);
                 return err;
         }
 
diff --git a/arch/powerpc/include/uapi/asm/ioctls.h b/arch/powerpc/include/uapi/asm/ioctls.h
index e9b78870aaab..49a25796a61a 100644
--- a/arch/powerpc/include/uapi/asm/ioctls.h
+++ b/arch/powerpc/include/uapi/asm/ioctls.h
@@ -97,6 +97,9 @@
 #define TIOCGDEV        _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
 #define TIOCSIG         _IOW('T',0x36, int)  /* Generate signal on Pty slave */
 #define TIOCVHANGUP     0x5437
+#define TIOCGPKT        _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK      _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL       _IOR('T', 0x40, int) /* Get exclusive mode state */
 
 #define TIOCSERCONFIG   0x5453
 #define TIOCSERGWILD    0x5454
diff --git a/arch/sh/include/uapi/asm/ioctls.h b/arch/sh/include/uapi/asm/ioctls.h
index a6769f352bf6..342241079760 100644
--- a/arch/sh/include/uapi/asm/ioctls.h
+++ b/arch/sh/include/uapi/asm/ioctls.h
@@ -88,6 +88,9 @@
 #define TIOCGDEV        _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
 #define TIOCSIG         _IOW('T',0x36, int)  /* Generate signal on Pty slave */
 #define TIOCVHANGUP     _IO('T', 0x37)
+#define TIOCGPKT        _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK      _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL       _IOR('T', 0x40, int) /* Get exclusive mode state */
 
 #define TIOCSERCONFIG   _IO('T', 83) /* 0x5453 */
 #define TIOCSERGWILD    _IOR('T', 84,  int) /* 0x5454 */
diff --git a/arch/sparc/include/uapi/asm/ioctls.h b/arch/sparc/include/uapi/asm/ioctls.h
index 9155f7041d44..897d1723fa14 100644
--- a/arch/sparc/include/uapi/asm/ioctls.h
+++ b/arch/sparc/include/uapi/asm/ioctls.h
@@ -21,6 +21,9 @@
 #define TCSETSF2        _IOW('T', 15, struct termios2)
 #define TIOCGDEV        _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
 #define TIOCVHANGUP     _IO('T', 0x37)
+#define TIOCGPKT        _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK      _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL       _IOR('T', 0x40, int) /* Get exclusive mode state */
 
 /* Note that all the ioctls that are not available in Linux have a 
  * double underscore on the front to: a) avoid some programs to
diff --git a/arch/um/drivers/chan_kern.c b/arch/um/drivers/chan_kern.c
index c3bba73e4be6..e9a0abc6a32f 100644
--- a/arch/um/drivers/chan_kern.c
+++ b/arch/um/drivers/chan_kern.c
@@ -83,21 +83,8 @@ static const struct chan_ops not_configged_ops = {
 
 static void tty_receive_char(struct tty_struct *tty, char ch)
 {
-        if (tty == NULL)
-                return;
-
-        if (I_IXON(tty) && !I_IXOFF(tty) && !tty->raw) {
-                if (ch == STOP_CHAR(tty)) {
-                        stop_tty(tty);
-                        return;
-                }
-                else if (ch == START_CHAR(tty)) {
-                        start_tty(tty);
-                        return;
-                }
-        }
-
-        tty_insert_flip_char(tty, ch, TTY_NORMAL);
+        if (tty)
+                tty_insert_flip_char(tty, ch, TTY_NORMAL);
 }
 
 static int open_one_chan(struct chan *chan)
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index fd9a15b318af..9ffc28bd4b7a 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -584,6 +584,8 @@ int register_lines(struct line_driver *line_driver,
                 printk(KERN_ERR "register_lines : can't register %s driver\n",
                        line_driver->name);
                 put_tty_driver(driver);
+                for (i = 0; i < nlines; i++)
+                        tty_port_destroy(&lines[i].port);
                 return err;
         }
 
diff --git a/arch/x86/platform/ce4100/ce4100.c b/arch/x86/platform/ce4100/ce4100.c
index 92525cb8e54c..f8ab4945892e 100644
--- a/arch/x86/platform/ce4100/ce4100.c
+++ b/arch/x86/platform/ce4100/ce4100.c
@@ -105,8 +105,11 @@ static void ce4100_serial_fixup(int port, struct uart_port *up,
                 up->membase =
                         (void __iomem *)__fix_to_virt(FIX_EARLYCON_MEM_BASE);
                 up->membase += up->mapbase & ~PAGE_MASK;
+                up->mapbase += port * 0x100;
+                up->membase += port * 0x100;
                 up->iotype   = UPIO_MEM32;
                 up->regshift = 2;
+                up->irq = 4;
         }
 #endif
         up->iobase = 0;
diff --git a/arch/xtensa/include/uapi/asm/ioctls.h b/arch/xtensa/include/uapi/asm/ioctls.h
index 2aa4cd9f0cec..b4cb1100c0fb 100644
--- a/arch/xtensa/include/uapi/asm/ioctls.h
+++ b/arch/xtensa/include/uapi/asm/ioctls.h
@@ -101,6 +101,9 @@
 #define TIOCGDEV        _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
 #define TIOCSIG         _IOW('T',0x36, int)  /* Generate signal on Pty slave */
 #define TIOCVHANGUP     _IO('T', 0x37)
+#define TIOCGPKT        _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK      _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL       _IOR('T', 0x40, int) /* Get exclusive mode state */
 
 #define TIOCSERCONFIG   _IO('T', 83)
 #define TIOCSERGWILD    _IOR('T', 84,  int)
diff --git a/arch/xtensa/platforms/iss/console.c b/arch/xtensa/platforms/iss/console.c
index 7e74895eee04..8207a119eee9 100644
--- a/arch/xtensa/platforms/iss/console.c
+++ b/arch/xtensa/platforms/iss/console.c
@@ -221,6 +221,7 @@ static __exit void rs_exit(void)
                 printk("ISS_SERIAL: failed to unregister serial driver (%d)\n",
                        error);
         put_tty_driver(serial_driver);
+        tty_port_destroy(&serial_port);
 }
 
 
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index c8abce3d2d9c..ed0fade46aed 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -270,15 +270,10 @@ static int hci_uart_send_frame(struct sk_buff *skb)
  */
 static int hci_uart_tty_open(struct tty_struct *tty)
 {
-        struct hci_uart *hu = (void *) tty->disc_data;
+        struct hci_uart *hu;
 
         BT_DBG("tty %p", tty);
 
-        /* FIXME: This btw is bogus, nothing requires the old ldisc to clear
-           the pointer */
-        if (hu)
-                return -EEXIST;
-
         /* Error if the tty has no write op instead of leaving an exploitable
            hole */
         if (tty->ops->write == NULL)
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 21721d25e388..b66eaa04f8cb 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -549,8 +549,10 @@ static int mgslpc_probe(struct pcmcia_device *link)
     /* Initialize the struct pcmcia_device structure */
 
     ret = mgslpc_config(link);
-    if (ret)
+    if (ret) {
+            tty_port_destroy(&info->port);
             return ret;
+    }
 
     mgslpc_add_device(info);
 
@@ -2757,6 +2759,7 @@ static void mgslpc_remove_device(MGSLPC_INFO *remove_info)
                         hdlcdev_exit(info);
 #endif
                         release_resources(info);
+                        tty_port_destroy(&info->port);
                         kfree(info);
                         mgslpc_device_count--;
                         return;
diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c
index af98f6d6509b..4945bd3d18d0 100644
--- a/drivers/char/ttyprintk.c
+++ b/drivers/char/ttyprintk.c
@@ -179,7 +179,6 @@ static int __init ttyprintk_init(void)
 {
         int ret = -ENOMEM;
 
-        tty_port_init(&tpk_port.port);
         tpk_port.port.ops = &null_ops;
         mutex_init(&tpk_port.port_write_mutex);
 
@@ -190,6 +189,8 @@ static int __init ttyprintk_init(void)
         if (IS_ERR(ttyprintk_driver))
                 return PTR_ERR(ttyprintk_driver);
 
+        tty_port_init(&tpk_port.port);
+
         ttyprintk_driver->driver_name = "ttyprintk";
         ttyprintk_driver->name = "ttyprintk";
         ttyprintk_driver->major = TTYAUX_MAJOR;
@@ -211,6 +212,7 @@ static int __init ttyprintk_init(void)
 error:
         tty_unregister_driver(ttyprintk_driver);
         put_tty_driver(ttyprintk_driver);
+        tty_port_destroy(&tpk_port.port);
         ttyprintk_driver = NULL;
         return ret;
 }
diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
index c06ab396e84f..576d53d92677 100644
--- a/drivers/ipack/devices/ipoctal.c
+++ b/drivers/ipack/devices/ipoctal.c
@@ -415,6 +415,7 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
                 tty_dev = tty_port_register_device(&channel->tty_port, tty, i, NULL);
                 if (IS_ERR(tty_dev)) {
                         dev_err(&ipoctal->dev->dev, "Failed to register tty device.\n");
+                        tty_port_destroy(&channel->tty_port);
                         continue;
                 }
                 dev_set_drvdata(tty_dev, channel);
@@ -700,6 +701,7 @@ static void __ipoctal_remove(struct ipoctal *ipoctal)
                 struct ipoctal_channel *channel = &ipoctal->channel[i];
                 tty_unregister_device(ipoctal->tty_drv, i);
                 tty_port_free_xmit_buf(&channel->tty_port);
+                tty_port_destroy(&channel->tty_port);
         }
 
         tty_unregister_driver(ipoctal->tty_drv);
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index c679867c2ccd..89562a845f6a 100644
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -77,8 +77,6 @@ struct ackqueue_entry {
 };
 
 struct capiminor {
-        struct kref kref;
-
         unsigned int      minor;
 
         struct capi20_appl      *ap;
@@ -190,7 +188,20 @@ static void capiminor_del_all_ack(struct capiminor *mp)
 
 /* -------- struct capiminor ---------------------------------------- */
 
-static const struct tty_port_operations capiminor_port_ops; /* we have none */
+static void capiminor_destroy(struct tty_port *port)
+{
+        struct capiminor *mp = container_of(port, struct capiminor, port);
+
+        kfree_skb(mp->outskb);
+        skb_queue_purge(&mp->inqueue);
+        skb_queue_purge(&mp->outqueue);
+        capiminor_del_all_ack(mp);
+        kfree(mp);
+}
+
+static const struct tty_port_operations capiminor_port_ops = {
+        .destruct = capiminor_destroy,
+};
 
 static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
 {
@@ -204,8 +215,6 @@ static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci)
                 return NULL;
         }
 
-        kref_init(&mp->kref);
-
         mp->ap = ap;
         mp->ncci = ncci;
         INIT_LIST_HEAD(&mp->ackqueue);
@@ -247,21 +256,10 @@ err_out2:
         spin_unlock(&capiminors_lock);
 
 err_out1:
-        kfree(mp);
+        tty_port_put(&mp->port);
         return NULL;
 }
 
-static void capiminor_destroy(struct kref *kref)
-{
-        struct capiminor *mp = container_of(kref, struct capiminor, kref);
-
-        kfree_skb(mp->outskb);
-        skb_queue_purge(&mp->inqueue);
-        skb_queue_purge(&mp->outqueue);
-        capiminor_del_all_ack(mp);
-        kfree(mp);
-}
-
 static struct capiminor *capiminor_get(unsigned int minor)
 {
         struct capiminor *mp;
@@ -269,7 +267,7 @@ static struct capiminor *capiminor_get(unsigned int minor)
         spin_lock(&capiminors_lock);
         mp = capiminors[minor];
         if (mp)
-                kref_get(&mp->kref);
+                tty_port_get(&mp->port);
         spin_unlock(&capiminors_lock);
 
         return mp;
@@ -277,7 +275,7 @@ static struct capiminor *capiminor_get(unsigned int minor)
 
 static inline void capiminor_put(struct capiminor *mp)
 {
-        kref_put(&mp->kref, capiminor_destroy);
+        tty_port_put(&mp->port);
 }
 
 static void capiminor_free(struct capiminor *mp)
diff --git a/drivers/isdn/gigaset/common.c b/drivers/isdn/gigaset/common.c
index 30a6b174fbb0..6849a11a1b24 100644
--- a/drivers/isdn/gigaset/common.c
+++ b/drivers/isdn/gigaset/common.c
@@ -507,6 +507,7 @@ void gigaset_freecs(struct cardstate *cs)
                 gig_dbg(DEBUG_INIT, "clearing at_state");
                 clear_at_state(&cs->at_state);
                 dealloc_temp_at_states(cs);
+                tty_port_destroy(&cs->port);
 
                 /* fall through */
         case 0: /* error in basic setup */
diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index b817809f763c..e09dc8a5e743 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -1849,6 +1849,8 @@ err_unregister:
                 kfree(info->fax);
 #endif
                 kfree(info->port.xmit_buf - 4);
+                info->port.xmit_buf = NULL;
+                tty_port_destroy(&info->port);
         }
         tty_unregister_driver(m->tty_modem);
 err:
@@ -1870,6 +1872,8 @@ isdn_tty_exit(void)
                 kfree(info->fax);
 #endif
                 kfree(info->port.xmit_buf - 4);
+                info->port.xmit_buf = NULL;
+                tty_port_destroy(&info->port);
         }
         tty_unregister_driver(dev->mdm.tty_modem);
         put_tty_driver(dev->mdm.tty_modem);
diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c
index 7003031c9181..f84ff0c06035 100644
--- a/drivers/misc/pti.c
+++ b/drivers/misc/pti.c
@@ -882,11 +882,14 @@ err:
 static void pti_pci_remove(struct pci_dev *pdev)
 {
         struct pti_dev *drv_data = pci_get_drvdata(pdev);
+        unsigned int a;
 
         unregister_console(&pti_console);
 
-        tty_unregister_device(pti_tty_driver, 0);
-        tty_unregister_device(pti_tty_driver, 1);
+        for (a = 0; a < PTITTY_MINOR_NUM; a++) {
+                tty_unregister_device(pti_tty_driver, a);
+                tty_port_destroy(&drv_data->port[a]);
+        }
 
         iounmap(drv_data->pti_ioaddr);
         pci_set_drvdata(pdev, NULL);
diff --git a/drivers/mmc/card/sdio_uart.c b/drivers/mmc/card/sdio_uart.c
index d2339ea37815..bd57a11acc79 100644
--- a/drivers/mmc/card/sdio_uart.c
+++ b/drivers/mmc/card/sdio_uart.c
@@ -66,8 +66,6 @@ struct uart_icount {
 
 struct sdio_uart_port {
         struct tty_port         port;
-        struct kref             kref;
-        struct tty_struct       *tty;
         unsigned int            index;
         struct sdio_func        *func;
         struct mutex            func_lock;
@@ -93,7 +91,6 @@ static int sdio_uart_add_port(struct sdio_uart_port *port)
 {
         int index, ret = -EBUSY;
 
-        kref_init(&port->kref);
         mutex_init(&port->func_lock);
         spin_lock_init(&port->write_lock);
         if (kfifo_alloc(&port->xmit_fifo, FIFO_SIZE, GFP_KERNEL))
@@ -123,23 +120,15 @@ static struct sdio_uart_port *sdio_uart_port_get(unsigned index)
         spin_lock(&sdio_uart_table_lock);
         port = sdio_uart_table[index];
         if (port)
-                kref_get(&port->kref);
+                tty_port_get(&port->port);
         spin_unlock(&sdio_uart_table_lock);
 
         return port;
 }
 
-static void sdio_uart_port_destroy(struct kref *kref)
-{
-        struct sdio_uart_port *port =
-                container_of(kref, struct sdio_uart_port, kref);
-        kfifo_free(&port->xmit_fifo);
-        kfree(port);
-}
-
 static void sdio_uart_port_put(struct sdio_uart_port *port)
 {
-        kref_put(&port->kref, sdio_uart_port_destroy);
+        tty_port_put(&port->port);
 }
 
 static void sdio_uart_port_remove(struct sdio_uart_port *port)
@@ -737,6 +726,14 @@ static void sdio_uart_shutdown(struct tty_port *tport)
         sdio_uart_release_func(port);
 }
 
+static void sdio_uart_port_destroy(struct tty_port *tport)
+{
+        struct sdio_uart_port *port =
+                container_of(tport, struct sdio_uart_port, port);
+        kfifo_free(&port->xmit_fifo);
+        kfree(port);
+}
+
 /**
  *      sdio_uart_install       -       install method
  *      @driver: the driver in use (sdio_uart in our case)
@@ -1045,6 +1042,7 @@ static const struct tty_port_operations sdio_uart_port_ops = {
         .carrier_raised = uart_carrier_raised,
         .shutdown = sdio_uart_shutdown,
         .activate = sdio_uart_activate,
+        .destruct = sdio_uart_port_destroy,
 };
 
 static const struct tty_operations sdio_uart_ops = {
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index 605a4baa9b7b..cd8ccb240f4b 100644
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -2274,6 +2274,7 @@ static void hso_serial_common_free(struct hso_serial *serial)
         /* unlink and free TX URB */
         usb_free_urb(serial->tx_urb);
         kfree(serial->tx_data);
+        tty_port_destroy(&serial->port);
 }
 
 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
@@ -2283,12 +2284,12 @@ static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
         int minor;
         int i;
 
+        tty_port_init(&serial->port);
+
         minor = get_free_serial_index();
         if (minor < 0)
                 goto exit;
 
-        tty_port_init(&serial->port);
-
         /* register our minor number */
         serial->parent->dev = tty_port_register_device(&serial->port, tty_drv,
                         minor, &serial->parent->interface->dev);
diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 4ed343e4eb41..40084501c31b 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -677,6 +677,7 @@ static void raw3215_free_info(struct raw3215_info *raw)
 {
         kfree(raw->inbuf);
         kfree(raw->buffer);
+        tty_port_destroy(&raw->port);
         kfree(raw);
 }
 
diff --git a/drivers/s390/char/sclp_tty.c b/drivers/s390/char/sclp_tty.c
index 30ec09e3d037..877fbc37c1e7 100644
--- a/drivers/s390/char/sclp_tty.c
+++ b/drivers/s390/char/sclp_tty.c
@@ -547,7 +547,6 @@ sclp_tty_init(void)
                 sclp_tty_tolower = 1;
         }
         sclp_tty_chars_count = 0;
-        tty_port_init(&sclp_port);
 
         rc = sclp_register(&sclp_input_event);
         if (rc) {
@@ -555,6 +554,8 @@ sclp_tty_init(void)
                 return rc;
         }
 
+        tty_port_init(&sclp_port);
+
         driver->driver_name = "sclp_line";
         driver->name = "sclp_line";
         driver->major = TTY_MAJOR;
@@ -571,6 +572,7 @@ sclp_tty_init(void)
         rc = tty_register_driver(driver);
         if (rc) {
                 put_tty_driver(driver);
+                tty_port_destroy(&sclp_port);
                 return rc;
         }
         sclp_tty_driver = driver;
diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c
index 7e60f3d2f3f9..effcc8756e0a 100644
--- a/drivers/s390/char/sclp_vt220.c
+++ b/drivers/s390/char/sclp_vt220.c
@@ -615,6 +615,7 @@ static void __init __sclp_vt220_cleanup(void)
                 return;
         sclp_unregister(&sclp_vt220_register);
         __sclp_vt220_free_pages();
+        tty_port_destroy(&sclp_vt220_port);
 }
 
 /* Allocate buffer pages and register with sclp core. Controlled by init
@@ -650,6 +651,7 @@ out:
         if (rc) {
                 __sclp_vt220_free_pages();
                 sclp_vt220_init_count--;
+                tty_port_destroy(&sclp_vt220_port);
         }
         return rc;
 }
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index 482ee028f842..43ea0593bdb0 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -722,6 +722,7 @@ out_pages:
         while (pages--)
                 free_pages((unsigned long) tp->freemem_pages[pages], 0);
         kfree(tp->freemem_pages);
+        tty_port_destroy(&tp->port);
 out_tp:
         kfree(tp);
 out_err:
@@ -744,6 +745,7 @@ tty3270_free_view(struct tty3270 *tp)
         for (pages = 0; pages < TTY3270_STRING_PAGES; pages++)
                 free_pages((unsigned long) tp->freemem_pages[pages], 0);
         kfree(tp->freemem_pages);
+        tty_port_destroy(&tp->port);
         kfree(tp);
 }
 
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index 943ca607200c..329bdb42109f 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -138,6 +138,8 @@ source "drivers/staging/imx-drm/Kconfig"
 
 source "drivers/staging/dgrp/Kconfig"
 
+source "drivers/staging/sb105x/Kconfig"
+
 source "drivers/staging/fwserial/Kconfig"
 
 endif # STAGING
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index 20c764d7ab33..c7ec486680f7 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -61,4 +61,5 @@ obj-$(CONFIG_NET_VENDOR_SILICOM)	+= silicom/
 obj-$(CONFIG_CED1401)           += ced1401/
 obj-$(CONFIG_DRM_IMX)           += imx-drm/
 obj-$(CONFIG_DGRP)              += dgrp/
+obj-$(CONFIG_SB105X)            += sb105x/
 obj-$(CONFIG_FIREWIRE_SERIAL)   += fwserial/
diff --git a/drivers/staging/ccg/u_serial.c b/drivers/staging/ccg/u_serial.c
index 5b3f5fffea92..373c40656b52 100644
--- a/drivers/staging/ccg/u_serial.c
+++ b/drivers/staging/ccg/u_serial.c
@@ -1140,8 +1140,10 @@ int gserial_setup(struct usb_gadget *g, unsigned count)
 
         return status;
 fail:
-        while (count--)
+        while (count--) {
+                tty_port_destroy(&ports[count].port->port);
                 kfree(ports[count].port);
+        }
         put_tty_driver(gs_tty_driver);
         gs_tty_driver = NULL;
         return status;
@@ -1195,6 +1197,7 @@ void gserial_cleanup(void)
 
                 WARN_ON(port->port_usb != NULL);
 
+                tty_port_destroy(&port->port);
                 kfree(port);
         }
         n_ports = 0;
diff --git a/drivers/staging/dgrp/dgrp_common.h b/drivers/staging/dgrp/dgrp_common.h
index 05ff338471ac..0583fe9c7b03 100644
--- a/drivers/staging/dgrp/dgrp_common.h
+++ b/drivers/staging/dgrp/dgrp_common.h
@@ -31,7 +31,6 @@
  * All global storage allocation.
  ************************************************************************/
 
-extern int dgrp_rawreadok;  /* Allow raw writing of input */
 extern int dgrp_register_cudevices; /* enable legacy cu devices */
 extern int dgrp_register_prdevices; /* enable transparent print devices */
 extern int dgrp_poll_tick;          /* Poll interval - in ms */
diff --git a/drivers/staging/dgrp/dgrp_driver.c b/drivers/staging/dgrp/dgrp_driver.c
index 6e4a0ebc0749..aa262588e9b9 100644
--- a/drivers/staging/dgrp/dgrp_driver.c
+++ b/drivers/staging/dgrp/dgrp_driver.c
@@ -39,14 +39,10 @@ MODULE_VERSION(DIGI_VERSION);
 struct list_head nd_struct_list;
 struct dgrp_poll_data dgrp_poll_data;
 
-int dgrp_rawreadok = 1;         /* Bypass flipbuf on input */
 int dgrp_register_cudevices = 1;/* Turn on/off registering legacy cu devices */
 int dgrp_register_prdevices = 1;/* Turn on/off registering transparent print */
 int dgrp_poll_tick = 20;        /* Poll interval - in ms */
 
-module_param_named(rawreadok, dgrp_rawreadok, int, 0644);
-MODULE_PARM_DESC(rawreadok, "Bypass flip buffers on input");
-
 module_param_named(register_cudevices, dgrp_register_cudevices, int, 0644);
 MODULE_PARM_DESC(register_cudevices, "Turn on/off registering legacy cu devices");
 
diff --git a/drivers/staging/dgrp/dgrp_net_ops.c b/drivers/staging/dgrp/dgrp_net_ops.c
index c409cd03e8c1..2d1bbfd5b67c 100644
--- a/drivers/staging/dgrp/dgrp_net_ops.c
+++ b/drivers/staging/dgrp/dgrp_net_ops.c
@@ -151,20 +151,15 @@ static void dgrp_read_data_block(struct ch_struct *ch, u8 *flipbuf,
  * Copys the rbuf to the flipbuf and sends to line discipline.
  * Sends input buffer data to the line discipline.
  *
- * There are several modes to consider here:
- *    rawreadok, tty->real_raw, and IF_PARMRK
  */
 static void dgrp_input(struct ch_struct *ch)
 {
         struct nd_struct *nd;
         struct tty_struct *tty;
-        int remain;
         int data_len;
         int len;
-        int flip_len;
         int tty_count;
         ulong lock_flags;
-        struct tty_ldisc *ld;
         u8  *myflipbuf;
         u8  *myflipflagbuf;
 
@@ -212,37 +207,11 @@ static void dgrp_input(struct ch_struct *ch)
 
         spin_unlock_irqrestore(&nd->nd_lock, lock_flags);
 
-        /* Decide how much data we can send into the tty layer */
-        if (dgrp_rawreadok && tty->real_raw)
-                flip_len = MYFLIPLEN;
-        else
-                flip_len = TTY_FLIPBUF_SIZE;
-
         /* data_len should be the number of chars that we read in */
         data_len = (ch->ch_rin - ch->ch_rout) & RBUF_MASK;
-        remain = data_len;
 
         /* len is the amount of data we are going to transfer here */
-        len = min(data_len, flip_len);
-
-        /* take into consideration length of ldisc */
-        len = min(len, (N_TTY_BUF_SIZE - 1) - tty->read_cnt);
-
-        ld = tty_ldisc_ref(tty);
-
-        /*
-         * If we were unable to get a reference to the ld,
-         * don't flush our buffer, and act like the ld doesn't
-         * have any space to put the data right now.
-         */
-        if (!ld) {
-                len = 0;
-        } else if (!ld->ops->receive_buf) {
-                spin_lock_irqsave(&nd->nd_lock, lock_flags);
-                ch->ch_rout = ch->ch_rin;
-                spin_unlock_irqrestore(&nd->nd_lock, lock_flags);
-                len = 0;
-        }
+        len = tty_buffer_request_room(tty, data_len);
 
         /* Check DPA flow control */
         if ((nd->nd_dpa_debug) &&
@@ -254,42 +223,22 @@ static void dgrp_input(struct ch_struct *ch)
 
                 dgrp_read_data_block(ch, myflipbuf, len);
 
-                /*
-                 * In high performance mode, we don't have to update
-                 * flag_buf or any of the counts or pointers into flip buf.
-                 */
-                if (!dgrp_rawreadok || !tty->real_raw) {
-                        if (I_PARMRK(tty) || I_BRKINT(tty) || I_INPCK(tty))
-                                parity_scan(ch, myflipbuf, myflipflagbuf, &len);
-                        else
-                                memset(myflipflagbuf, TTY_NORMAL, len);
-                }
+                if (I_PARMRK(tty) || I_BRKINT(tty) || I_INPCK(tty))
+                        parity_scan(ch, myflipbuf, myflipflagbuf, &len);
+                else
+                        memset(myflipflagbuf, TTY_NORMAL, len);
 
                 if ((nd->nd_dpa_debug) &&
                     (nd->nd_dpa_port == PORT_NUM(MINOR(tty_devnum(tty)))))
                         dgrp_dpa_data(nd, 1, myflipbuf, len);
 
-                /*
-                 * If we're doing raw reads, jam it right into the
-                 * line disc bypassing the flip buffers.
-                 */
-                if (dgrp_rawreadok && tty->real_raw)
-                        ld->ops->receive_buf(tty, myflipbuf, NULL, len);
-                else {
-                        len = tty_buffer_request_room(tty, len);
-                        tty_insert_flip_string_flags(tty, myflipbuf,
-                                                     myflipflagbuf, len);
-
-                        /* Tell the tty layer its okay to "eat" the data now */
-                        tty_flip_buffer_push(tty);
-                }
+                tty_insert_flip_string_flags(tty, myflipbuf,
+                                             myflipflagbuf, len);
+                tty_flip_buffer_push(tty);
 
                 ch->ch_rxcount += len;
         }
 
-        if (ld)
-                tty_ldisc_deref(ld);
-
         /*
          * Wake up any sleepers (maybe dgrp close) that might be waiting
          * for a channel flag state change.
@@ -2549,7 +2498,7 @@ data:
 
                         /*
                          *  Fabricate and insert a data packet header to
-                         *  preceed the remaining data when it comes in.
+                         *  preced the remaining data when it comes in.
                          */
 
                         if (remain < plen) {
@@ -2718,7 +2667,7 @@ data:
                                                 }
 
                                                 /*
-                                                 *  Handle delayed response arrival preceeding
+                                                 *  Handle delayed response arrival preceding
                                                  *  the open response we are waiting for.
                                                  */
 
@@ -3556,7 +3505,7 @@ void dgrp_poll_handler(unsigned long arg)
                 /*
                  * Decrement statistics.  These are only for use with
                  * KME, so don't worry that the operations are done
-                 * unlocked, and so the results are occassionally wrong.
+                 * unlocked, and so the results are occasionally wrong.
                  */
 
                 nd->nd_read_count -= (nd->nd_read_count +
diff --git a/drivers/staging/dgrp/dgrp_specproc.c b/drivers/staging/dgrp/dgrp_specproc.c
index 24327c3bad83..c214078a89e9 100644
--- a/drivers/staging/dgrp/dgrp_specproc.c
+++ b/drivers/staging/dgrp/dgrp_specproc.c
@@ -629,8 +629,6 @@ static int info_proc_show(struct seq_file *m, void *v)
 {
         seq_printf(m, "version: %s\n", DIGI_VERSION);
         seq_puts(m, "register_with_sysfs: 1\n");
-        seq_printf(m, "rawreadok: 0x%08x\t(%d)\n",
-                   dgrp_rawreadok, dgrp_rawreadok);
         seq_printf(m, "pollrate: 0x%08x\t(%d)\n",
                    dgrp_poll_tick, dgrp_poll_tick);
 
@@ -754,6 +752,8 @@ static int dgrp_add_id(long id)
 
         return 0;
 
+        /* FIXME this guy should free the tty driver stored in nd and destroy
+         * all channel ports */
 error_out:
         kfree(nd);
         return ret;
diff --git a/drivers/staging/dgrp/dgrp_sysfs.c b/drivers/staging/dgrp/dgrp_sysfs.c
index 43ab9f4d9349..be179adfb7c7 100644
--- a/drivers/staging/dgrp/dgrp_sysfs.c
+++ b/drivers/staging/dgrp/dgrp_sysfs.c
@@ -54,23 +54,6 @@ static DEVICE_ATTR(register_with_sysfs, 0400,
                    dgrp_class_register_with_sysfs_show, NULL);
 
 
-static ssize_t dgrp_class_rawreadok_show(struct device *c,
-                                         struct device_attribute *attr,
-                                         char *buf)
-{
-        return snprintf(buf, PAGE_SIZE, "%d\n", dgrp_rawreadok);
-}
-static ssize_t dgrp_class_rawreadok_store(struct device *c,
-                                          struct device_attribute *attr,
-                                          const char *buf, size_t count)
-{
-        sscanf(buf, "0x%x\n", &dgrp_rawreadok);
-        return count;
-}
-static DEVICE_ATTR(rawreadok, 0600, dgrp_class_rawreadok_show,
-                   dgrp_class_rawreadok_store);
-
-
 static ssize_t dgrp_class_pollrate_show(struct device *c,
                                         struct device_attribute *attr,
                                         char *buf)
@@ -90,7 +73,6 @@ static DEVICE_ATTR(pollrate, 0600, dgrp_class_pollrate_show,
 
 static struct attribute *dgrp_sysfs_global_settings_entries[] = {
         &dev_attr_pollrate.attr,
-        &dev_attr_rawreadok.attr,
         &dev_attr_register_with_sysfs.attr,
         NULL
 };
diff --git a/drivers/staging/dgrp/dgrp_tty.c b/drivers/staging/dgrp/dgrp_tty.c
index efa62ced7c8a..51d3ed3dca27 100644
--- a/drivers/staging/dgrp/dgrp_tty.c
+++ b/drivers/staging/dgrp/dgrp_tty.c
@@ -432,7 +432,7 @@ static void drp_param(struct ch_struct *ch)
         /*
          * From the POSIX.1 spec (7.1.2.6): "If {_POSIX_VDISABLE}
          * is defined for the terminal device file, and the value
-         * of one of the changable special control characters (see
+         * of one of the changeable special control characters (see
          * 7.1.1.9) is {_POSIX_VDISABLE}, that function shall be
          * disabled, that is, no input data shall be recognized as
          * the disabled special character."
@@ -2265,9 +2265,7 @@ static int get_modem_info(struct ch_struct *ch, unsigned int *value)
                 | ((mlast & DM_RI)  ? TIOCM_RNG : 0)
                 | ((mlast & DM_DSR) ? TIOCM_DSR : 0)
                 | ((mlast & DM_CTS) ? TIOCM_CTS : 0);
-        put_user(mlast, (unsigned int __user *) value);
-
-        return 0;
+        return put_user(mlast, (unsigned int __user *) value);
 }
 
 /*
@@ -2285,7 +2283,8 @@ static int set_modem_info(struct ch_struct *ch, unsigned int command,
         if (error == 0)
                 return -EFAULT;
 
-        get_user(arg, (unsigned int __user *) value);
+        if (get_user(arg, (unsigned int __user *) value))
+                return -EFAULT;
         mval |= ((arg & TIOCM_RTS) ? DM_RTS : 0)
                 | ((arg & TIOCM_DTR) ? DM_DTR : 0);
 
@@ -2684,7 +2683,7 @@ static int dgrp_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
         - looking at the tty_ioctl code, these command all call our
         tty_set_termios at the driver's end, when a TCSETA* is sent,
         it is expecting the tty to have a termio structure,
-        NOT a termios stucture.  These two structures differ in size
+        NOT a termios structure.  These two structures differ in size
         and the tty_ioctl code does a conversion before processing them both.
         - we should treat the TCSETAW TCSETAF ioctls the same, and let
         the tty_ioctl code do the conversion stuff.
@@ -2836,17 +2835,16 @@ static int dgrp_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
                 break;
 
         case DIGI_GETCUSTOMBAUD:
-                rc = access_ok(VERIFY_WRITE, (void __user *) arg, sizeof(int));
-                if (rc == 0)
+                if (put_user(ch->ch_custom_speed, (unsigned int __user *) arg))
                         return -EFAULT;
-                put_user(ch->ch_custom_speed, (unsigned int __user *) arg);
                 break;
 
         case DIGI_SETCUSTOMBAUD:
         {
                 int new_rate;
 
-                get_user(new_rate, (unsigned int __user *) arg);
+                if (get_user(new_rate, (unsigned int __user *) arg))
+                        return -EFAULT;
                 dgrp_set_custom_speed(ch, new_rate);
 
                 break;
@@ -2981,7 +2979,7 @@ static void dgrp_tty_start(struct tty_struct *tty)
 }
 
 /*
- *      Stop the reciever
+ *      Stop the receiver
  */
 static void dgrp_tty_input_stop(struct tty_struct *tty)
 {
@@ -3104,6 +3102,7 @@ static void dgrp_tty_hangup(struct tty_struct *tty)
 void
 dgrp_tty_uninit(struct nd_struct *nd)
 {
+        unsigned int i;
         char id[3];
 
         ID_TO_CHAR(nd->nd_ID, id);
@@ -3137,6 +3136,8 @@ dgrp_tty_uninit(struct nd_struct *nd)
                 put_tty_driver(nd->nd_xprint_ttdriver);
                 nd->nd_ttdriver_flags &= ~XPRINT_TTDRV_REG;
         }
+        for (i = 0; i < CHAN_MAX; i++)
+                tty_port_destroy(&nd->nd_chan[i].port);
 }
 
 
@@ -3320,7 +3321,6 @@ dgrp_tty_init(struct nd_struct *nd)
                 init_waitqueue_head(&(ch->ch_pun.un_open_wait));
                 init_waitqueue_head(&(ch->ch_pun.un_close_wait));
                 tty_port_init(&ch->port);
-                tty_port_init(&ch->port);
         }
         return 0;
 }
diff --git a/drivers/staging/fwserial/fwserial.c b/drivers/staging/fwserial/fwserial.c
index 5d4d64a3ea81..61ee29083b26 100644
--- a/drivers/staging/fwserial/fwserial.c
+++ b/drivers/staging/fwserial/fwserial.c
@@ -939,14 +939,9 @@ static void fwserial_destroy(struct kref *kref)
 
         mutex_lock(&port_table_lock);
         for (j = 0; j < num_ports; ++i, ++j) {
-                static bool once;
-                int corrupt = port_table[i] != ports[j];
-                if (corrupt && !once) {
-                        WARN(corrupt, "port_table[%d]: %p != ports[%d]: %p",
-                             i, port_table[i], j, ports[j]);
-                        once = true;
-                        port_table_corrupt = true;
-                }
+                port_table_corrupt |= port_table[i] != ports[j];
+                WARN_ONCE(port_table_corrupt, "port_table[%d]: %p != ports[%d]: %p",
+                     i, port_table[i], j, ports[j]);
 
                 port_table[i] = NULL;
         }
@@ -954,7 +949,7 @@ static void fwserial_destroy(struct kref *kref)
 
         for (j = 0; j < num_ports; ++j) {
                 fw_core_remove_address_handler(&ports[j]->rx_handler);
-                dma_fifo_free(&ports[j]->tx_fifo);
+                tty_port_destroy(&ports[j]->port);
                 kfree(ports[j]);
         }
         kfree(serial);
@@ -2369,8 +2364,10 @@ unregister_ttys:
         return err;
 
 free_ports:
-        for (--i; i >= 0; --i)
+        for (--i; i >= 0; --i) {
+                tty_port_destroy(&serial->ports[i]->port);
                 kfree(serial->ports[i]);
+        }
         kfree(serial);
         return err;
 }
diff --git a/drivers/staging/sb105x/Kconfig b/drivers/staging/sb105x/Kconfig
new file mode 100644
index 000000000000..ac87c5e38dee
--- /dev/null
+++ b/drivers/staging/sb105x/Kconfig
@@ -0,0 +1,9 @@
+config SB105X
+        tristate "SystemBase PCI Multiport UART"
+        select SERIAL_CORE
+        depends on PCI
+        help
+          A driver for the SystemBase Multi-2/PCI serial card
+
+          To compile this driver a module, choose M here: the module
+          will be called "sb105x".
diff --git a/drivers/staging/sb105x/Makefile b/drivers/staging/sb105x/Makefile
new file mode 100644
index 000000000000..b1bf3779acae
--- /dev/null
+++ b/drivers/staging/sb105x/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_SB105X) += sb105x.o
+
+sb105x-y :=  sb_pci_mp.o
diff --git a/drivers/staging/sb105x/sb_mp_register.h b/drivers/staging/sb105x/sb_mp_register.h
new file mode 100644
index 000000000000..5480ae11368f
--- /dev/null
+++ b/drivers/staging/sb105x/sb_mp_register.h
@@ -0,0 +1,295 @@
+
+/*
+ * SB105X_UART.h
+ *
+ * Copyright (C) 2008 systembase
+ *
+ * UART registers.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef UART_SB105X_H
+#define UART_SB105X_H
+
+/* 
+ * option register 
+ */
+
+/* Device Infomation Register */
+#define MP_OPTR_DIR0            0x04    /* port0 ~ port8 */
+#define MP_OPTR_DIR1            0x05    /* port8 ~ port15 */
+#define MP_OPTR_DIR2            0x06    /* port16 ~ port23 */
+#define MP_OPTR_DIR3            0x07    /* port24 ~ port31 */
+
+#define DIR_UART_16C550         0
+#define DIR_UART_16C1050        1
+#define DIR_UART_16C1050A       2
+
+#define DIR_CLK_1843200         0x0             /* input clock 1843200 Hz */
+#define DIR_CLK_3686400         0x1             /* input clock 3686400 Hz */
+#define DIR_CLK_7372800         0x2             /* input clock 7372800 Hz */
+#define DIR_CLK_14745600        0x3             /* input clock 14745600 Hz */
+#define DIR_CLK_29491200        0x4             /* input clock 29491200 Hz */
+#define DIR_CLK_58985400        0x5             /* input clock 58985400 Hz */
+
+/* Interface Information Register */
+#define MP_OPTR_IIR0            0x08    /* port0 ~ port8 */
+#define MP_OPTR_IIR1            0x09    /* port8 ~ port15 */
+#define MP_OPTR_IIR2            0x0A    /* port16 ~ port23 */
+#define MP_OPTR_IIR3            0x0B    /* port24 ~ port31 */
+
+#define IIR_RS232               0x00            /* RS232 type */
+#define IIR_RS422               0x10            /* RS422 type */
+#define IIR_RS485               0x20            /* RS485 type */
+#define IIR_UNKNOWN             0x30            /* unknown type */
+
+/* Interrrupt Mask Register */
+#define MP_OPTR_IMR0            0x0C    /* port0 ~ port8 */
+#define MP_OPTR_IMR1            0x0D    /* port8 ~ port15 */
+#define MP_OPTR_IMR2            0x0E    /* port16 ~ port23 */
+#define MP_OPTR_IMR3            0x0F    /* port24 ~ port31 */
+
+/* Interrupt Poll Register */
+#define MP_OPTR_IPR0            0x10    /* port0 ~ port8 */
+#define MP_OPTR_IPR1            0x11    /* port8 ~ port15 */
+#define MP_OPTR_IPR2            0x12    /* port16 ~ port23 */
+#define MP_OPTR_IPR3            0x13    /* port24 ~ port31 */
+
+/* General Purpose Output Control Register */
+#define MP_OPTR_GPOCR           0x20
+
+/* General Purpose Output Data Register */
+#define MP_OPTR_GPODR           0x21
+
+/* Parallel Additional Function Register */
+#define MP_OPTR_PAFR            0x23
+
+/*
+ * systembase 16c105x UART register
+ */
+
+#define PAGE_0 0
+#define PAGE_1 1
+#define PAGE_2 2
+#define PAGE_3 3
+#define PAGE_4 4
+
+/*
+ *  ******************************************************************
+ *  * DLAB=0                  ===============       Page 0 Registers *
+ *  ******************************************************************
+ */
+
+#define SB105X_RX               0       /* In:  Receive buffer */
+#define SB105X_TX               0       /* Out: Transmit buffer */
+
+#define SB105X_IER              1       /* Out: Interrupt Enable Register */
+
+#define SB105X_IER_CTSI         0x80    /* CTS# Interrupt Enable (Requires EFR[4] = 1) */
+#define SB105X_IER_RTSI         0x40    /* RTS# Interrupt Enable (Requires EFR[4] = 1) */
+#define SB105X_IER_XOI          0x20    /* Xoff Interrupt Enable (Requires EFR[4] = 1) */
+#define SB105X_IER_SME          0x10    /* Sleep Mode Enable (Requires EFR[4] = 1) */
+#define SB105X_IER_MSI          0x08    /* Enable Modem status interrupt */
+#define SB105X_IER_RLSI         0x04    /* Enable receiver line status interrupt */
+#define SB105X_IER_THRI         0x02    /* Enable Transmitter holding register int. */
+#define SB105X_IER_RDI          0x01    /* Enable receiver data interrupt */
+
+#define SB105X_ISR              2       /* In:  Interrupt ID Register */
+
+#define SB105X_ISR_NOINT        0x01    /* No interrupts pending */
+#define SB105X_ISR_RLSI         0x06    /* Receiver line status interrupt (Priority = 1)*/
+#define SB105X_ISR_RDAI         0x0c    /* Receive Data Available interrupt */
+#define SB105X_ISR_CTII         0x04    /* Character Timeout Indication interrupt */
+#define SB105X_ISR_THRI         0x02    /* Transmitter holding register empty */
+#define SB105X_ISR_MSI          0x00    /* Modem status interrupt */
+#define SB105X_ISR_RXCI         0x10    /* Receive Xoff or Special Character interrupt */
+#define SB105X_ISR_RCSI         0x20    /* RTS#, CTS# status interrupt during Auto RTS/CTS flow control */
+
+#define SB105X_FCR              2       /* Out: FIFO Control Register */
+
+#define SB105X_FCR_FEN          0x01    /* FIFO Enable */
+#define SB105X_FCR_RXFR         0x02    /* RX FIFO Reset */
+#define SB105X_FCR_TXFR         0x04    /* TX FIFO Reset */
+#define SB105X_FCR_DMS          0x08    /* DMA Mode Select */
+
+#define SB105X_FCR_RTR08        0x00    /* Receice Trigger Level set at 8 */
+#define SB105X_FCR_RTR16        0x40  /* Receice Trigger Level set at 16 */
+#define SB105X_FCR_RTR56        0x80  /* Receice Trigger Level set at 56 */
+#define SB105X_FCR_RTR60        0xc0  /* Receice Trigger Level set at 60 */
+#define SB105X_FCR_TTR08        0x00  /* Transmit Trigger Level set at 8 */
+#define SB105X_FCR_TTR16        0x10  /* Transmit Trigger Level set at 16 */
+#define SB105X_FCR_TTR32        0x20  /* Transmit Trigger Level set at 32 */
+#define SB105X_FCR_TTR56        0x30  /* Transmit Trigger Level set at 56 */
+
+#define SB105X_LCR              3       /* Out: Line Control Register */
+/*
+ *  * Note: if the word length is 5 bits (SB105X_LCR_WLEN5), then setting 
+ *  * SB105X_LCR_STOP will select 1.5 stop bits, not 2 stop bits.
+ */
+#define SB105X_LCR_DLAB         0x80  /* Divisor Latch Enable */
+#define SB105X_LCR_SBC          0x40  /* Break Enable*/
+#define SB105X_LCR_SPAR         0x20  /* Set Stick parity */
+#define SB105X_LCR_EPAR         0x10  /* Even parity select */
+#define SB105X_LCR_PAREN        0x08  /* Parity Enable */
+#define SB105X_LCR_STOP         0x04  /* Stop bits: 0->1 bit, 1->2 bits, 1 and SB105X_LCR_WLEN5 -> 1.5 bit */
+#define SB105X_LCR_WLEN5        0x00  /* Wordlength: 5 bits */
+#define SB105X_LCR_WLEN6        0x01  /* Wordlength: 6 bits */
+#define SB105X_LCR_WLEN7        0x02  /* Wordlength: 7 bits */
+#define SB105X_LCR_WLEN8        0x03  /* Wordlength: 8 bits */
+
+#define SB105X_LCR_BF           0xBF
+
+#define SB105X_MCR              4       /* Out: Modem Control Register */
+#define SB105X_MCR_CPS          0x80  /* Clock Prescaler Select */
+#define SB105X_MCR_P2S          0x40  /* Page 2 Select /Xoff Re-Transmit Access Enable */
+#define SB105X_MCR_XOA          0x20  /* Xon Any Enable */
+#define SB105X_MCR_ILB          0x10  /* Internal Loopback Enable */
+#define SB105X_MCR_OUT2         0x08  /* Out2/Interrupt Output Enable*/
+#define SB105X_MCR_OUT1         0x04  /* Out1/Interrupt Output Enable */
+#define SB105X_MCR_RTS          0x02  /* RTS# Output */
+#define SB105X_MCR_DTR          0x01  /* DTR# Output */
+
+#define SB105X_LSR              5       /* In:  Line Status Register */
+#define SB105X_LSR_RFEI         0x80  /* Receive FIFO data error Indicator */
+#define SB105X_LSR_TEMI         0x40  /* THR and TSR Empty Indicator */
+#define SB105X_LSR_THRE         0x20  /* THR Empty Indicator */
+#define SB105X_LSR_BII          0x10  /* Break interrupt indicator */
+#define SB105X_LSR_FEI          0x08  /* Frame error indicator */
+#define SB105X_LSR_PEI          0x04  /* Parity error indicator */
+#define SB105X_LSR_OEI          0x02  /* Overrun error indicator */
+#define SB105X_LSR_RDRI         0x01  /* Receive data ready Indicator*/
+
+#define SB105X_MSR              6       /* In:  Modem Status Register */
+#define SB105X_MSR_DCD          0x80  /* Data Carrier Detect */
+#define SB105X_MSR_RI           0x40  /* Ring Indicator */
+#define SB105X_MSR_DSR          0x20  /* Data Set Ready */
+#define SB105X_MSR_CTS          0x10  /* Clear to Send */
+#define SB105X_MSR_DDCD         0x08  /* Delta DCD */
+#define SB105X_MSR_DRI          0x04  /* Delta ring indicator */
+#define SB105X_MSR_DDSR         0x02  /* Delta DSR */
+#define SB105X_MSR_DCTS         0x01  /* Delta CTS */
+
+#define SB105XA_MDR             6       /* Out: Multi Drop mode Register */
+#define SB105XA_MDR_NPS         0x08  /* 9th Bit Polarity Select */
+#define SB105XA_MDR_AME         0x02  /* Auto Multi-drop Enable */
+#define SB105XA_MDR_MDE         0x01  /* Multi Drop Enable */
+
+#define SB105X_SPR              7       /* I/O: Scratch Register */
+
+/*
+ * DLAB=1
+ */
+#define SB105X_DLL              0       /* Out: Divisor Latch Low */
+#define SB105X_DLM              1       /* Out: Divisor Latch High */
+
+/*
+ *  ******************************************************************
+ *  * DLAB(LCR[7]) = 0 , MCR[6] = 1  =============  Page 2 Registers *
+ *  ******************************************************************
+ */
+#define SB105X_GICR             1       /* Global Interrupt Control Register */
+#define SB105X_GICR_GIM         0x01  /* Global Interrupt Mask */
+
+#define SB105X_GISR             2       /* Global Interrupt Status Register */
+#define SB105X_GISR_MGICR0      0x80  /* Mirror the content of GICR[0] */
+#define SB105X_GISR_CS3IS       0x08  /* SB105X of CS3# Interrupt Status */
+#define SB105X_GISR_CS2IS       0x04  /* SB105X of CS2# Interrupt Status */
+#define SB105X_GISR_CS1IS       0x02  /* SB105X of CS1# Interrupt Status */
+#define SB105X_GISR_CS0IS       0x01  /* SB105X of CS0# Interrupt Status */
+
+#define SB105X_TFCR             5       /* Transmit FIFO Count Register */
+
+#define SB105X_RFCR             6       /* Receive FIFO Count Register */
+
+#define SB105X_FSR              7       /* Flow Control Status Register */
+#define SB105X_FSR_THFS         0x20  /* Transmit Hardware Flow Control Status */
+#define SB105X_FSR_TSFS         0x10  /* Transmit Software Flow Control Status */
+#define SB105X_FSR_RHFS         0x02  /* Receive Hardware Flow Control Status */
+#define SB105X_FSR_RSFS         0x01  /* Receive Software Flow Control Status */
+
+/*
+ *  ******************************************************************
+ *  * LCR = 0xBF, PSR[0] = 0       =============    Page 3 Registers *
+ *  ******************************************************************
+ */
+
+#define SB105X_PSR              0       /* Page Select Register */
+#define SB105X_PSR_P3KEY        0xA4 /* Page 3 Select Key */
+#define SB105X_PSR_P4KEY        0xA5 /* Page 5 Select Key */
+
+#define SB105X_ATR              1       /* Auto Toggle Control Register */
+#define SB105X_ATR_RPS          0x80  /* RXEN Polarity Select */
+#define SB105X_ATR_RCMS         0x40  /* RXEN Control Mode Select */
+#define SB105X_ATR_TPS          0x20  /* TXEN Polarity Select */
+#define SB105X_ATR_TCMS         0x10  /* TXEN Control Mode Select */
+#define SB105X_ATR_ATDIS        0x00  /* Auto Toggle is disabled */
+#define SB105X_ATR_ART          0x01  /* RTS#/TXEN pin operates as TXEN */
+#define SB105X_ATR_ADT          0x02  /* DTR#/TXEN pin operates as TXEN */
+#define SB105X_ATR_A80          0x03  /* only in 80 pin use */
+
+#define SB105X_EFR              2       /* (Auto) Enhanced Feature Register */
+#define SB105X_EFR_ACTS         0x80  /* Auto-CTS Flow Control Enable */
+#define SB105X_EFR_ARTS         0x40  /* Auto-RTS Flow Control Enable */
+#define SB105X_EFR_SCD          0x20  /* Special Character Detect */
+#define SB105X_EFR_EFBEN        0x10  /* Enhanced Function Bits Enable */
+
+#define SB105X_XON1             4       /* Xon1 Character Register */
+#define SB105X_XON2             5       /* Xon2 Character Register */
+#define SB105X_XOFF1            6       /* Xoff1 Character Register */
+#define SB105X_XOFF2            7       /* Xoff2 Character Register */
+
+/*
+ *  ******************************************************************
+ *  * LCR = 0xBF, PSR[0] = 1       ============     Page 4 Registers *
+ *  ******************************************************************
+ */
+
+#define SB105X_AFR              1       /* Additional Feature Register */
+#define SB105X_AFR_GIPS         0x20  /* Global Interrupt Polarity Select */
+#define SB105X_AFR_GIEN         0x10  /* Global Interrupt Enable */
+#define SB105X_AFR_AFEN         0x01  /* 256-byte FIFO Enable */
+
+#define SB105X_XRCR             2       /* Xoff Re-transmit Count Register */
+#define SB105X_XRCR_NRC1        0x00  /* Transmits Xoff Character whenever the number of received data is 1 during XOFF status */
+#define SB105X_XRCR_NRC4        0x01  /* Transmits Xoff Character whenever the number of received data is 4 during XOFF status */
+#define SB105X_XRCR_NRC8        0x02  /* Transmits Xoff Character whenever the number of received data is 8 during XOFF status */
+#define SB105X_XRCR_NRC16       0x03  /* Transmits Xoff Character whenever the number of received data is 16 during XOFF status */
+
+#define SB105X_TTR              4       /* Transmit FIFO Trigger Level Register */
+#define SB105X_RTR              5       /* Receive FIFO Trigger Level Register */
+#define SB105X_FUR              6       /* Flow Control Upper Threshold Register */
+#define SB105X_FLR              7       /* Flow Control Lower Threshold Register */
+
+
+/* page 0 */
+
+#define SB105X_GET_CHAR(port)   inb((port)->iobase + SB105X_RX)
+#define SB105X_GET_IER(port)    inb((port)->iobase + SB105X_IER)
+#define SB105X_GET_ISR(port)    inb((port)->iobase + SB105X_ISR)
+#define SB105X_GET_LCR(port)    inb((port)->iobase + SB105X_LCR)
+#define SB105X_GET_MCR(port)    inb((port)->iobase + SB105X_MCR)
+#define SB105X_GET_LSR(port)    inb((port)->iobase + SB105X_LSR)
+#define SB105X_GET_MSR(port)    inb((port)->iobase + SB105X_MSR)
+#define SB105X_GET_SPR(port)    inb((port)->iobase + SB105X_SPR)
+
+#define SB105X_PUT_CHAR(port,v) outb((v),(port)->iobase + SB105X_TX )
+#define SB105X_PUT_IER(port,v)  outb((v),(port)->iobase + SB105X_IER )
+#define SB105X_PUT_FCR(port,v)  outb((v),(port)->iobase + SB105X_FCR )
+#define SB105X_PUT_LCR(port,v)  outb((v),(port)->iobase + SB105X_LCR )
+#define SB105X_PUT_MCR(port,v)  outb((v),(port)->iobase + SB105X_MCR )
+#define SB105X_PUT_SPR(port,v)  outb((v),(port)->iobase + SB105X_SPR )
+
+
+/* page 1 */
+#define SB105X_GET_REG(port,reg)        inb((port)->iobase + (reg))
+#define SB105X_PUT_REG(port,reg,v)      outb((v),(port)->iobase + (reg))
+
+/* page 2 */
+
+#define SB105X_PUT_PSR(port,v)  outb((v),(port)->iobase + SB105X_PSR )
+
+#endif 
diff --git a/drivers/staging/sb105x/sb_pci_mp.c b/drivers/staging/sb105x/sb_pci_mp.c
new file mode 100644
index 000000000000..edb2a85b9d52
--- /dev/null
+++ b/drivers/staging/sb105x/sb_pci_mp.c
@@ -0,0 +1,3196 @@
+#include "sb_pci_mp.h"
+#include <linux/module.h>
+#include <linux/parport.h>
+
+extern struct parport *parport_pc_probe_port(unsigned long base_lo,
+                unsigned long base_hi,
+                int irq, int dma,
+                struct device *dev,
+                int irqflags);
+
+static struct mp_device_t mp_devs[MAX_MP_DEV];
+static int mp_nrpcibrds = sizeof(mp_pciboards)/sizeof(mppcibrd_t);
+static int NR_BOARD=0;
+static int NR_PORTS=0;
+static struct mp_port multi_ports[MAX_MP_PORT];
+static struct irq_info irq_lists[NR_IRQS];
+
+static _INLINE_ unsigned int serial_in(struct mp_port *mtpt, int offset);
+static _INLINE_ void serial_out(struct mp_port *mtpt, int offset, int value);
+static _INLINE_ unsigned int read_option_register(struct mp_port *mtpt, int offset);
+static int sb1054_get_register(struct sb_uart_port * port, int page, int reg);
+static int sb1054_set_register(struct sb_uart_port * port, int page, int reg, int value);
+static void SendATCommand(struct mp_port * mtpt);
+static int set_deep_fifo(struct sb_uart_port * port, int status);
+static int get_deep_fifo(struct sb_uart_port * port);
+static int get_device_type(int arg);
+static int set_auto_rts(struct sb_uart_port *port, int status);
+static void mp_stop(struct tty_struct *tty);
+static void __mp_start(struct tty_struct *tty);
+static void mp_start(struct tty_struct *tty);
+static void mp_tasklet_action(unsigned long data);
+static inline void mp_update_mctrl(struct sb_uart_port *port, unsigned int set, unsigned int clear);
+static int mp_startup(struct sb_uart_state *state, int init_hw);
+static void mp_shutdown(struct sb_uart_state *state);
+static void mp_change_speed(struct sb_uart_state *state, struct MP_TERMIOS *old_termios);
+
+static inline int __mp_put_char(struct sb_uart_port *port, struct circ_buf *circ, unsigned char c);
+static int mp_put_char(struct tty_struct *tty, unsigned char ch);
+
+static void mp_put_chars(struct tty_struct *tty);
+static int mp_write(struct tty_struct *tty, const unsigned char * buf, int count);
+static int mp_write_room(struct tty_struct *tty);
+static int mp_chars_in_buffer(struct tty_struct *tty);
+static void mp_flush_buffer(struct tty_struct *tty);
+static void mp_send_xchar(struct tty_struct *tty, char ch);
+static void mp_throttle(struct tty_struct *tty);
+static void mp_unthrottle(struct tty_struct *tty);
+static int mp_get_info(struct sb_uart_state *state, struct serial_struct *retinfo);
+static int mp_set_info(struct sb_uart_state *state, struct serial_struct *newinfo);
+static int mp_get_lsr_info(struct sb_uart_state *state, unsigned int *value);
+
+static int mp_tiocmget(struct tty_struct *tty);
+static int mp_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear);
+static int mp_break_ctl(struct tty_struct *tty, int break_state);
+static int mp_do_autoconfig(struct sb_uart_state *state);
+static int mp_wait_modem_status(struct sb_uart_state *state, unsigned long arg);
+static int mp_get_count(struct sb_uart_state *state, struct serial_icounter_struct *icnt);
+static int mp_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg);
+static void mp_set_termios(struct tty_struct *tty, struct MP_TERMIOS *old_termios);
+static void mp_close(struct tty_struct *tty, struct file *filp);
+static void mp_wait_until_sent(struct tty_struct *tty, int timeout);
+static void mp_hangup(struct tty_struct *tty);
+static void mp_update_termios(struct sb_uart_state *state);
+static int mp_block_til_ready(struct file *filp, struct sb_uart_state *state);
+static struct sb_uart_state *uart_get(struct uart_driver *drv, int line);
+static int mp_open(struct tty_struct *tty, struct file *filp);
+static const char *mp_type(struct sb_uart_port *port);
+static void mp_change_pm(struct sb_uart_state *state, int pm_state);
+static inline void mp_report_port(struct uart_driver *drv, struct sb_uart_port *port);
+static void mp_configure_port(struct uart_driver *drv, struct sb_uart_state *state, struct sb_uart_port *port);
+static void mp_unconfigure_port(struct uart_driver *drv, struct sb_uart_state *state);
+static int mp_register_driver(struct uart_driver *drv);
+static void mp_unregister_driver(struct uart_driver *drv);
+static int mp_add_one_port(struct uart_driver *drv, struct sb_uart_port *port);
+static int mp_remove_one_port(struct uart_driver *drv, struct sb_uart_port *port);
+static void autoconfig(struct mp_port *mtpt, unsigned int probeflags);
+static void autoconfig_irq(struct mp_port *mtpt);
+static void multi_stop_tx(struct sb_uart_port *port);
+static void multi_start_tx(struct sb_uart_port *port);
+static void multi_stop_rx(struct sb_uart_port *port);
+static void multi_enable_ms(struct sb_uart_port *port);
+static _INLINE_ void receive_chars(struct mp_port *mtpt, int *status );
+static _INLINE_ void transmit_chars(struct mp_port *mtpt);
+static _INLINE_ void check_modem_status(struct mp_port *mtpt);
+static inline void multi_handle_port(struct mp_port *mtpt);
+static irqreturn_t multi_interrupt(int irq, void *dev_id);
+static void serial_do_unlink(struct irq_info *i, struct mp_port *mtpt);
+static int serial_link_irq_chain(struct mp_port *mtpt);
+static void serial_unlink_irq_chain(struct mp_port *mtpt);
+static void multi_timeout(unsigned long data);
+static unsigned int multi_tx_empty(struct sb_uart_port *port);
+static unsigned int multi_get_mctrl(struct sb_uart_port *port);
+static void multi_set_mctrl(struct sb_uart_port *port, unsigned int mctrl);
+static void multi_break_ctl(struct sb_uart_port *port, int break_state);
+static int multi_startup(struct sb_uart_port *port);
+static void multi_shutdown(struct sb_uart_port *port);
+static unsigned int multi_get_divisor(struct sb_uart_port *port, unsigned int baud);
+static void multi_set_termios(struct sb_uart_port *port, struct MP_TERMIOS *termios, struct MP_TERMIOS *old);
+static void multi_pm(struct sb_uart_port *port, unsigned int state, unsigned int oldstate);
+static void multi_release_std_resource(struct mp_port *mtpt);
+static void multi_release_port(struct sb_uart_port *port);
+static int multi_request_port(struct sb_uart_port *port);
+static void multi_config_port(struct sb_uart_port *port, int flags);
+static int multi_verify_port(struct sb_uart_port *port, struct serial_struct *ser);
+static const char * multi_type(struct sb_uart_port *port);
+static void __init multi_init_ports(void);
+static void __init multi_register_ports(struct uart_driver *drv);
+static int init_mp_dev(struct pci_dev *pcidev, mppcibrd_t brd);
+
+static int deep[256];
+static int deep_count;
+static int fcr_arr[256];
+static int fcr_count;
+static int ttr[256];
+static int ttr_count;
+static int rtr[256];
+static int rtr_count;
+
+module_param_array(deep,int,&deep_count,0);
+module_param_array(fcr_arr,int,&fcr_count,0);
+module_param_array(ttr,int,&ttr_count,0);
+module_param_array(rtr,int,&rtr_count,0);
+
+static _INLINE_ unsigned int serial_in(struct mp_port *mtpt, int offset)
+{
+        return inb(mtpt->port.iobase + offset);
+}
+
+static _INLINE_ void serial_out(struct mp_port *mtpt, int offset, int value)
+{
+        outb(value, mtpt->port.iobase + offset);
+}
+
+static _INLINE_ unsigned int read_option_register(struct mp_port *mtpt, int offset)
+{
+        return inb(mtpt->option_base_addr + offset);
+}
+
+static int sb1053a_get_interface(struct mp_port *mtpt, int port_num)
+{
+        unsigned long option_base_addr = mtpt->option_base_addr;
+        unsigned int  interface = 0;
+
+        switch (port_num)
+        {
+                case 0:
+                case 1:
+                        /* set GPO[1:0] = 00 */
+                        outb(0x00, option_base_addr + MP_OPTR_GPODR);
+                        break;
+                case 2:
+                case 3:
+                        /* set GPO[1:0] = 01 */
+                        outb(0x01, option_base_addr + MP_OPTR_GPODR);
+                        break;
+                case 4:
+                case 5:
+                        /* set GPO[1:0] = 10 */
+                        outb(0x02, option_base_addr + MP_OPTR_GPODR);
+                        break;
+                default:
+                        break;
+        }
+
+        port_num &= 0x1;
+
+        /* get interface */
+        interface = inb(option_base_addr + MP_OPTR_IIR0 + port_num);
+
+        /* set GPO[1:0] = 11 */
+        outb(0x03, option_base_addr + MP_OPTR_GPODR);
+
+        return (interface);
+}
+                
+static int sb1054_get_register(struct sb_uart_port * port, int page, int reg)
+{
+        int ret = 0;
+        unsigned int lcr = 0;
+        unsigned int mcr = 0;
+        unsigned int tmp = 0;
+
+        if( page <= 0)
+        {
+                printk(" page 0 can not use this fuction\n");
+                return -1;
+        }
+
+        switch(page)
+        {
+                case 1:
+                        lcr = SB105X_GET_LCR(port);
+                        tmp = lcr | SB105X_LCR_DLAB;
+                        SB105X_PUT_LCR(port, tmp);
+
+                        tmp = SB105X_GET_LCR(port);
+
+                        ret = SB105X_GET_REG(port,reg);
+                        SB105X_PUT_LCR(port,lcr);
+                        break;
+                case 2:
+                        mcr = SB105X_GET_MCR(port);
+                        tmp = mcr | SB105X_MCR_P2S;
+                        SB105X_PUT_MCR(port,tmp);
+
+                        ret = SB105X_GET_REG(port,reg);
+
+                        SB105X_PUT_MCR(port,mcr);
+                        break;
+                case 3:
+                        lcr = SB105X_GET_LCR(port);
+                        tmp = lcr | SB105X_LCR_BF;
+                        SB105X_PUT_LCR(port,tmp);
+                        SB105X_PUT_REG(port,SB105X_PSR,SB105X_PSR_P3KEY);
+
+                        ret = SB105X_GET_REG(port,reg);
+
+                        SB105X_PUT_LCR(port,lcr);
+                        break;
+                case 4:
+                        lcr = SB105X_GET_LCR(port);
+                        tmp = lcr | SB105X_LCR_BF;
+                        SB105X_PUT_LCR(port,tmp);
+                        SB105X_PUT_REG(port,SB105X_PSR,SB105X_PSR_P4KEY);
+
+                        ret = SB105X_GET_REG(port,reg);
+
+                        SB105X_PUT_LCR(port,lcr);
+                        break;
+                default:
+                        printk(" error invalid page number \n");
+                        return -1;
+        }
+
+        return ret;
+}
+
+static int sb1054_set_register(struct sb_uart_port * port, int page, int reg, int value)
+{  
+        int lcr = 0;
+        int mcr = 0;
+        int ret = 0;
+
+        if( page <= 0)
+        {
+                printk(" page 0 can not use this fuction\n");
+                return -1;
+        }
+        switch(page)
+        {
+                case 1:
+                        lcr = SB105X_GET_LCR(port);
+                        SB105X_PUT_LCR(port, lcr | SB105X_LCR_DLAB);
+
+                        SB105X_PUT_REG(port,reg,value);
+
+                        SB105X_PUT_LCR(port, lcr);
+                        ret = 1;
+                        break;
+                case 2:
+                        mcr = SB105X_GET_MCR(port);
+                        SB105X_PUT_MCR(port, mcr | SB105X_MCR_P2S);
+
+                        SB105X_PUT_REG(port,reg,value);
+
+                        SB105X_PUT_MCR(port, mcr);
+                        ret = 1;
+                        break;
+                case 3:
+                        lcr = SB105X_GET_LCR(port);
+                        SB105X_PUT_LCR(port, lcr | SB105X_LCR_BF);
+                        SB105X_PUT_PSR(port, SB105X_PSR_P3KEY);
+
+                        SB105X_PUT_REG(port,reg,value);
+
+                        SB105X_PUT_LCR(port, lcr);
+                        ret = 1;
+                        break;
+                case 4:
+                        lcr = SB105X_GET_LCR(port);
+                        SB105X_PUT_LCR(port, lcr | SB105X_LCR_BF);
+                        SB105X_PUT_PSR(port, SB105X_PSR_P4KEY);
+
+                        SB105X_PUT_REG(port,reg,value);
+
+                        SB105X_PUT_LCR(port, lcr);
+                        ret = 1;
+                        break;
+                default:
+                        printk(" error invalid page number \n");
+                        return -1;
+        }
+
+        return ret;
+}
+
+static int set_multidrop_mode(struct sb_uart_port *port, unsigned int mode)
+{
+        int mdr = SB105XA_MDR_NPS;
+
+        if (mode & MDMODE_ENABLE)
+        {
+                mdr |= SB105XA_MDR_MDE;
+        }
+
+        if (1) //(mode & MDMODE_AUTO)
+        {
+                int efr = 0;
+                mdr |= SB105XA_MDR_AME;
+                efr = sb1054_get_register(port, PAGE_3, SB105X_EFR);
+                efr |= SB105X_EFR_SCD;
+                sb1054_set_register(port, PAGE_3, SB105X_EFR, efr);
+        }
+
+        sb1054_set_register(port, PAGE_1, SB105XA_MDR, mdr);
+        port->mdmode &= ~0x6;
+        port->mdmode |= mode;
+        printk("[%d] multidrop init: %x\n", port->line, port->mdmode);
+
+        return 0;
+}
+
+static int get_multidrop_addr(struct sb_uart_port *port)
+{
+        return sb1054_get_register(port, PAGE_3, SB105X_XOFF2);
+}
+
+static int set_multidrop_addr(struct sb_uart_port *port, unsigned int addr)
+{
+        sb1054_set_register(port, PAGE_3, SB105X_XOFF2, addr);
+
+        return 0;
+}
+
+static void SendATCommand(struct mp_port * mtpt)
+{
+        //                    a    t    cr   lf
+        unsigned char ch[] = {0x61,0x74,0x0d,0x0a,0x0};
+        unsigned char lineControl;
+        unsigned char i=0;
+        unsigned char Divisor = 0xc;
+
+        lineControl = serial_inp(mtpt,UART_LCR);
+        serial_outp(mtpt,UART_LCR,(lineControl | UART_LCR_DLAB));
+        serial_outp(mtpt,UART_DLL,(Divisor & 0xff));
+        serial_outp(mtpt,UART_DLM,(Divisor & 0xff00)>>8); //baudrate is 4800
+
+
+        serial_outp(mtpt,UART_LCR,lineControl); 
+        serial_outp(mtpt,UART_LCR,0x03); // N-8-1
+        serial_outp(mtpt,UART_FCR,7); 
+        serial_outp(mtpt,UART_MCR,0x3);
+        while(ch[i]){
+                while((serial_inp(mtpt,UART_LSR) & 0x60) !=0x60){
+                        ;
+                }
+                serial_outp(mtpt,0,ch[i++]);
+        }
+
+
+}// end of SendATCommand()
+
+static int set_deep_fifo(struct sb_uart_port * port, int status)
+{
+        int afr_status = 0;
+        afr_status = sb1054_get_register(port, PAGE_4, SB105X_AFR);
+
+        if(status == ENABLE)
+        {
+                afr_status |= SB105X_AFR_AFEN;
+        }
+        else
+        {
+                afr_status &= ~SB105X_AFR_AFEN;
+        }
+                
+        sb1054_set_register(port,PAGE_4,SB105X_AFR,afr_status);
+        sb1054_set_register(port,PAGE_4,SB105X_TTR,ttr[port->line]); 
+        sb1054_set_register(port,PAGE_4,SB105X_RTR,rtr[port->line]); 
+        afr_status = sb1054_get_register(port, PAGE_4, SB105X_AFR);
+                
+        return afr_status;
+}
+
+static int get_device_type(int arg)
+{
+        int ret;
+        ret = inb(mp_devs[arg].option_reg_addr+MP_OPTR_DIR0);
+        ret = (ret & 0xf0) >> 4;
+        switch (ret)
+        {
+               case DIR_UART_16C550:
+                    return PORT_16C55X;
+               case DIR_UART_16C1050:
+                    return PORT_16C105X;
+               case DIR_UART_16C1050A:
+               /*
+               if (mtpt->port.line < 2)
+               {
+                    return PORT_16C105XA;
+               }
+               else
+               {
+                   if (mtpt->device->device_id & 0x50)
+                   {
+                       return PORT_16C55X;
+                   }
+                   else
+                   {
+                       return PORT_16C105X;
+                   }
+               }*/
+               return PORT_16C105XA;
+               default:
+                    return PORT_UNKNOWN;
+        }
+
+}
+static int get_deep_fifo(struct sb_uart_port * port)
+{
+        int afr_status = 0;
+        afr_status = sb1054_get_register(port, PAGE_4, SB105X_AFR);
+        return afr_status;
+}
+
+static int set_auto_rts(struct sb_uart_port *port, int status)
+{
+        int atr_status = 0;
+
+#if 0
+        int efr_status = 0;
+
+        efr_status = sb1054_get_register(port, PAGE_3, SB105X_EFR);
+        if(status == ENABLE)
+                efr_status |= SB105X_EFR_ARTS;
+        else
+                efr_status &= ~SB105X_EFR_ARTS;
+        sb1054_set_register(port,PAGE_3,SB105X_EFR,efr_status);
+        efr_status = sb1054_get_register(port, PAGE_3, SB105X_EFR);
+#endif
+                
+//ATR
+        atr_status = sb1054_get_register(port, PAGE_3, SB105X_ATR);
+        switch(status)
+        {
+                case RS422PTP:
+                        atr_status = (SB105X_ATR_TPS) | (SB105X_ATR_A80);
+                        break;
+                case RS422MD:
+                        atr_status = (SB105X_ATR_TPS) | (SB105X_ATR_TCMS) | (SB105X_ATR_A80);
+                        break;
+                case RS485NE:
+                        atr_status = (SB105X_ATR_RCMS) | (SB105X_ATR_TPS) | (SB105X_ATR_TCMS) | (SB105X_ATR_A80);
+                        break;
+                case RS485ECHO:
+                        atr_status = (SB105X_ATR_TPS) | (SB105X_ATR_TCMS) | (SB105X_ATR_A80);
+                        break;
+        }
+
+        sb1054_set_register(port,PAGE_3,SB105X_ATR,atr_status);
+        atr_status = sb1054_get_register(port, PAGE_3, SB105X_ATR);
+
+        return atr_status;
+}
+
+static void mp_stop(struct tty_struct *tty)
+{
+        struct sb_uart_state *state = tty->driver_data;
+        struct sb_uart_port *port = state->port;
+        unsigned long flags;
+
+        spin_lock_irqsave(&port->lock, flags);
+        port->ops->stop_tx(port);
+        spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static void __mp_start(struct tty_struct *tty)
+{
+        struct sb_uart_state *state = tty->driver_data;
+        struct sb_uart_port *port = state->port;
+
+        if (!uart_circ_empty(&state->info->xmit) && state->info->xmit.buf &&
+                        !tty->stopped && !tty->hw_stopped)
+                port->ops->start_tx(port);
+}
+
+static void mp_start(struct tty_struct *tty)
+{
+        __mp_start(tty);
+}
+
+static void mp_tasklet_action(unsigned long data)
+{
+        struct sb_uart_state *state = (struct sb_uart_state *)data;
+        struct tty_struct *tty;
+
+        printk("tasklet is called!\n");
+        tty = state->info->tty;
+        tty_wakeup(tty);
+}
+
+static inline void mp_update_mctrl(struct sb_uart_port *port, unsigned int set, unsigned int clear)
+{
+        unsigned int old;
+
+        old = port->mctrl;
+        port->mctrl = (old & ~clear) | set;
+        if (old != port->mctrl)
+                port->ops->set_mctrl(port, port->mctrl);
+}
+
+#define uart_set_mctrl(port,set)        mp_update_mctrl(port,set,0)
+#define uart_clear_mctrl(port,clear)    mp_update_mctrl(port,0,clear)
+
+static int mp_startup(struct sb_uart_state *state, int init_hw)
+{
+        struct sb_uart_info *info = state->info;
+        struct sb_uart_port *port = state->port;
+        unsigned long page;
+        int retval = 0;
+
+        if (info->flags & UIF_INITIALIZED)
+                return 0;
+
+        if (info->tty)
+                set_bit(TTY_IO_ERROR, &info->tty->flags);
+
+        if (port->type == PORT_UNKNOWN)
+                return 0;
+
+        if (!info->xmit.buf) {
+                page = get_zeroed_page(GFP_KERNEL);
+                if (!page)
+                        return -ENOMEM;
+
+                info->xmit.buf = (unsigned char *) page;
+                        
+                uart_circ_clear(&info->xmit);
+        }
+
+        retval = port->ops->startup(port);
+        if (retval == 0) {
+                if (init_hw) {
+                        mp_change_speed(state, NULL);
+
+                        if (info->tty->termios.c_cflag & CBAUD)
+                                uart_set_mctrl(port, TIOCM_RTS | TIOCM_DTR);
+                }
+
+                info->flags |= UIF_INITIALIZED;
+
+
+                clear_bit(TTY_IO_ERROR, &info->tty->flags);
+        }
+
+        if (retval && capable(CAP_SYS_ADMIN))
+                retval = 0;
+
+        return retval;
+}
+
+static void mp_shutdown(struct sb_uart_state *state)
+{
+        struct sb_uart_info *info = state->info;
+        struct sb_uart_port *port = state->port;
+
+        if (info->tty)
+                set_bit(TTY_IO_ERROR, &info->tty->flags);
+
+        if (info->flags & UIF_INITIALIZED) {
+                info->flags &= ~UIF_INITIALIZED;
+
+                if (!info->tty || (info->tty->termios.c_cflag & HUPCL))
+                        uart_clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
+
+                wake_up_interruptible(&info->delta_msr_wait);
+
+                port->ops->shutdown(port);
+
+                synchronize_irq(port->irq);
+        }
+        tasklet_kill(&info->tlet);
+
+        if (info->xmit.buf) {
+                free_page((unsigned long)info->xmit.buf);
+                info->xmit.buf = NULL;
+        }
+}
+
+static void mp_change_speed(struct sb_uart_state *state, struct MP_TERMIOS *old_termios)
+{
+        struct tty_struct *tty = state->info->tty;
+        struct sb_uart_port *port = state->port;
+
+        if (!tty || port->type == PORT_UNKNOWN)
+                return;
+
+        if (tty->termios.c_cflag & CRTSCTS)
+                state->info->flags |= UIF_CTS_FLOW;
+        else
+                state->info->flags &= ~UIF_CTS_FLOW;
+
+        if (tty->termios.c_cflag & CLOCAL)
+                state->info->flags &= ~UIF_CHECK_CD;
+        else
+                state->info->flags |= UIF_CHECK_CD;
+
+        port->ops->set_termios(port, &tty->termios, old_termios);
+}
+
+static inline int __mp_put_char(struct sb_uart_port *port, struct circ_buf *circ, unsigned char c)
+{
+        unsigned long flags;
+        int ret = 0;
+
+        if (!circ->buf)
+                return 0;
+
+        spin_lock_irqsave(&port->lock, flags);
+        if (uart_circ_chars_free(circ) != 0) {
+                circ->buf[circ->head] = c;
+                circ->head = (circ->head + 1) & (UART_XMIT_SIZE - 1);
+                ret = 1;
+        }
+        spin_unlock_irqrestore(&port->lock, flags);
+        return ret;
+}
+
+static int mp_put_char(struct tty_struct *tty, unsigned char ch)
+{
+        struct sb_uart_state *state = tty->driver_data;
+
+        return __mp_put_char(state->port, &state->info->xmit, ch);
+}
+
+static void mp_put_chars(struct tty_struct *tty)
+{
+        mp_start(tty);
+}
+
+static int mp_write(struct tty_struct *tty, const unsigned char * buf, int count)
+{
+        struct sb_uart_state *state = tty->driver_data;
+        struct sb_uart_port *port;
+        struct circ_buf *circ;
+        int c, ret = 0;
+
+        if (!state || !state->info) {
+                return -EL3HLT;
+        }
+
+        port = state->port;
+        circ = &state->info->xmit;
+
+        if (!circ->buf)
+                return 0;
+                
+        while (1) {
+                c = CIRC_SPACE_TO_END(circ->head, circ->tail, UART_XMIT_SIZE);
+                if (count < c)
+                        c = count;
+                if (c <= 0)
+                        break;
+        memcpy(circ->buf + circ->head, buf, c);
+
+                circ->head = (circ->head + c) & (UART_XMIT_SIZE - 1);
+                buf += c;
+                count -= c;
+                ret += c;
+        }
+        mp_start(tty);
+        return ret;
+}
+
+static int mp_write_room(struct tty_struct *tty)
+{
+        struct sb_uart_state *state = tty->driver_data;
+
+        return uart_circ_chars_free(&state->info->xmit);
+}
+
+static int mp_chars_in_buffer(struct tty_struct *tty)
+{
+        struct sb_uart_state *state = tty->driver_data;
+
+        return uart_circ_chars_pending(&state->info->xmit);
+}
+
+static void mp_flush_buffer(struct tty_struct *tty)
+{
+        struct sb_uart_state *state = tty->driver_data;
+        struct sb_uart_port *port;
+        unsigned long flags;
+
+        if (!state || !state->info) {
+                return;
+        }
+
+        port = state->port;
+        spin_lock_irqsave(&port->lock, flags);
+        uart_circ_clear(&state->info->xmit);
+        spin_unlock_irqrestore(&port->lock, flags);
+        wake_up_interruptible(&tty->write_wait);
+        tty_wakeup(tty);
+}
+
+static void mp_send_xchar(struct tty_struct *tty, char ch)
+{
+        struct sb_uart_state *state = tty->driver_data;
+        struct sb_uart_port *port = state->port;
+        unsigned long flags;
+
+        if (port->ops->send_xchar)
+                port->ops->send_xchar(port, ch);
+        else {
+                port->x_char = ch;
+                if (ch) {
+                        spin_lock_irqsave(&port->lock, flags);
+                        port->ops->start_tx(port);
+                        spin_unlock_irqrestore(&port->lock, flags);
+                }
+        }
+}
+
+static void mp_throttle(struct tty_struct *tty)
+{
+        struct sb_uart_state *state = tty->driver_data;
+
+        if (I_IXOFF(tty))
+                mp_send_xchar(tty, STOP_CHAR(tty));
+
+        if (tty->termios.c_cflag & CRTSCTS)
+                uart_clear_mctrl(state->port, TIOCM_RTS);
+}
+
+static void mp_unthrottle(struct tty_struct *tty)
+{
+        struct sb_uart_state *state = tty->driver_data;
+        struct sb_uart_port *port = state->port;
+
+        if (I_IXOFF(tty)) {
+                if (port->x_char)
+                        port->x_char = 0;
+                else
+                        mp_send_xchar(tty, START_CHAR(tty));
+        }
+
+        if (tty->termios.c_cflag & CRTSCTS)
+                uart_set_mctrl(port, TIOCM_RTS);
+}
+
+static int mp_get_info(struct sb_uart_state *state, struct serial_struct *retinfo)
+{
+        struct sb_uart_port *port = state->port;
+        struct serial_struct tmp;
+
+        memset(&tmp, 0, sizeof(tmp));
+        tmp.type            = port->type;
+        tmp.line            = port->line;
+        tmp.port            = port->iobase;
+        if (HIGH_BITS_OFFSET)
+                tmp.port_high = (long) port->iobase >> HIGH_BITS_OFFSET;
+        tmp.irq             = port->irq;
+        tmp.flags           = port->flags;
+        tmp.xmit_fifo_size  = port->fifosize;
+        tmp.baud_base       = port->uartclk / 16;
+        tmp.close_delay     = state->close_delay;
+        tmp.closing_wait    = state->closing_wait == USF_CLOSING_WAIT_NONE ?
+                ASYNC_CLOSING_WAIT_NONE :
+                state->closing_wait;
+        tmp.custom_divisor  = port->custom_divisor;
+        tmp.hub6            = port->hub6;
+        tmp.io_type         = port->iotype;
+        tmp.iomem_reg_shift = port->regshift;
+        tmp.iomem_base      = (void *)port->mapbase;
+
+        if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
+                return -EFAULT;
+        return 0;
+}
+
+static int mp_set_info(struct sb_uart_state *state, struct serial_struct *newinfo)
+{
+        struct serial_struct new_serial;
+        struct sb_uart_port *port = state->port;
+        unsigned long new_port;
+        unsigned int change_irq, change_port, closing_wait;
+        unsigned int old_custom_divisor;
+        unsigned int old_flags, new_flags;
+        int retval = 0;
+
+        if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
+                return -EFAULT;
+
+        new_port = new_serial.port;
+        if (HIGH_BITS_OFFSET)
+                new_port += (unsigned long) new_serial.port_high << HIGH_BITS_OFFSET;
+
+        new_serial.irq = irq_canonicalize(new_serial.irq);
+
+        closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
+                USF_CLOSING_WAIT_NONE : new_serial.closing_wait;
+        MP_STATE_LOCK(state);
+
+        change_irq  = new_serial.irq != port->irq;
+        change_port = new_port != port->iobase ||
+                (unsigned long)new_serial.iomem_base != port->mapbase ||
+                new_serial.hub6 != port->hub6 ||
+                new_serial.io_type != port->iotype ||
+                new_serial.iomem_reg_shift != port->regshift ||
+                new_serial.type != port->type;
+        old_flags = port->flags;
+        new_flags = new_serial.flags;
+        old_custom_divisor = port->custom_divisor;
+
+        if (!capable(CAP_SYS_ADMIN)) {
+                retval = -EPERM;
+                if (change_irq || change_port ||
+                                (new_serial.baud_base != port->uartclk / 16) ||
+                                (new_serial.close_delay != state->close_delay) ||
+                                (closing_wait != state->closing_wait) ||
+                                (new_serial.xmit_fifo_size != port->fifosize) ||
+                                (((new_flags ^ old_flags) & ~UPF_USR_MASK) != 0))
+                        goto exit;
+                port->flags = ((port->flags & ~UPF_USR_MASK) |
+                                (new_flags & UPF_USR_MASK));
+                port->custom_divisor = new_serial.custom_divisor;
+                goto check_and_exit;
+        }
+
+        if (port->ops->verify_port)
+                retval = port->ops->verify_port(port, &new_serial);
+
+        if ((new_serial.irq >= NR_IRQS) || (new_serial.irq < 0) ||
+                        (new_serial.baud_base < 9600))
+                retval = -EINVAL;
+
+        if (retval)
+                goto exit;
+
+        if (change_port || change_irq) {
+                retval = -EBUSY;
+
+                if (uart_users(state) > 1)
+                        goto exit;
+
+                mp_shutdown(state);
+        }
+
+        if (change_port) {
+                unsigned long old_iobase, old_mapbase;
+                unsigned int old_type, old_iotype, old_hub6, old_shift;
+
+                old_iobase = port->iobase;
+                old_mapbase = port->mapbase;
+                old_type = port->type;
+                old_hub6 = port->hub6;
+                old_iotype = port->iotype;
+                old_shift = port->regshift;
+
+                if (old_type != PORT_UNKNOWN)
+                        port->ops->release_port(port);
+
+                port->iobase = new_port;
+                port->type = new_serial.type;
+                port->hub6 = new_serial.hub6;
+                port->iotype = new_serial.io_type;
+                port->regshift = new_serial.iomem_reg_shift;
+                port->mapbase = (unsigned long)new_serial.iomem_base;
+
+                if (port->type != PORT_UNKNOWN) {
+                        retval = port->ops->request_port(port);
+                } else {
+                        retval = 0;
+                }
+
+                if (retval && old_type != PORT_UNKNOWN) {
+                        port->iobase = old_iobase;
+                        port->type = old_type;
+                        port->hub6 = old_hub6;
+                        port->iotype = old_iotype;
+                        port->regshift = old_shift;
+                        port->mapbase = old_mapbase;
+                        retval = port->ops->request_port(port);
+                        if (retval)
+                                port->type = PORT_UNKNOWN;
+
+                        retval = -EBUSY;
+                }
+        }
+
+        port->irq              = new_serial.irq;
+        port->uartclk          = new_serial.baud_base * 16;
+        port->flags            = (port->flags & ~UPF_CHANGE_MASK) |
+                (new_flags & UPF_CHANGE_MASK);
+        port->custom_divisor   = new_serial.custom_divisor;
+        state->close_delay     = new_serial.close_delay;
+        state->closing_wait    = closing_wait;
+        port->fifosize         = new_serial.xmit_fifo_size;
+        if (state->info->tty)
+                state->info->tty->low_latency =
+                        (port->flags & UPF_LOW_LATENCY) ? 1 : 0;
+
+check_and_exit:
+        retval = 0;
+        if (port->type == PORT_UNKNOWN)
+                goto exit;
+        if (state->info->flags & UIF_INITIALIZED) {
+                if (((old_flags ^ port->flags) & UPF_SPD_MASK) ||
+                                old_custom_divisor != port->custom_divisor) {
+                        if (port->flags & UPF_SPD_MASK) {
+                                printk(KERN_NOTICE
+                                                "%s sets custom speed on ttyMP%d. This "
+                                                "is deprecated.\n", current->comm,
+                                                port->line);
+                        }
+                        mp_change_speed(state, NULL);
+                }
+        } else
+                retval = mp_startup(state, 1);
+exit:
+        MP_STATE_UNLOCK(state);
+        return retval;
+}
+
+
+static int mp_get_lsr_info(struct sb_uart_state *state, unsigned int *value)
+{
+        struct sb_uart_port *port = state->port;
+        unsigned int result;
+
+        result = port->ops->tx_empty(port);
+
+        if (port->x_char ||
+                        ((uart_circ_chars_pending(&state->info->xmit) > 0) &&
+                                !state->info->tty->stopped && !state->info->tty->hw_stopped))
+                result &= ~TIOCSER_TEMT;
+
+        return put_user(result, value);
+}
+
+static int mp_tiocmget(struct tty_struct *tty)
+{
+        struct sb_uart_state *state = tty->driver_data;
+        struct sb_uart_port *port = state->port;
+        int result = -EIO;
+
+        MP_STATE_LOCK(state);
+        if (!(tty->flags & (1 << TTY_IO_ERROR))) {
+                result = port->mctrl;
+                spin_lock_irq(&port->lock);
+                result |= port->ops->get_mctrl(port);
+                spin_unlock_irq(&port->lock);
+        }
+        MP_STATE_UNLOCK(state);
+        return result;
+}
+
+static int mp_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear)
+{
+        struct sb_uart_state *state = tty->driver_data;
+        struct sb_uart_port *port = state->port;
+        int ret = -EIO;
+
+
+        MP_STATE_LOCK(state);
+        if (!(tty->flags & (1 << TTY_IO_ERROR))) {
+                mp_update_mctrl(port, set, clear);
+                ret = 0;
+        }
+        MP_STATE_UNLOCK(state);
+
+        return ret;
+}
+
+static int mp_break_ctl(struct tty_struct *tty, int break_state)
+{
+        struct sb_uart_state *state = tty->driver_data;
+        struct sb_uart_port *port = state->port;
+
+        MP_STATE_LOCK(state);
+
+        if (port->type != PORT_UNKNOWN)
+                port->ops->break_ctl(port, break_state);
+
+        MP_STATE_UNLOCK(state);
+        return 0;
+}
+
+static int mp_do_autoconfig(struct sb_uart_state *state)
+{
+        struct sb_uart_port *port = state->port;
+        int flags, ret;
+
+        if (!capable(CAP_SYS_ADMIN))
+                return -EPERM;
+
+        if (mutex_lock_interruptible(&state->mutex))
+                return -ERESTARTSYS;
+        ret = -EBUSY;
+        if (uart_users(state) == 1) {
+                mp_shutdown(state);
+
+                if (port->type != PORT_UNKNOWN)
+                        port->ops->release_port(port);
+
+                flags = UART_CONFIG_TYPE;
+                if (port->flags & UPF_AUTO_IRQ)
+                        flags |= UART_CONFIG_IRQ;
+
+                port->ops->config_port(port, flags);
+
+                ret = mp_startup(state, 1);
+        }
+        MP_STATE_UNLOCK(state);
+        return ret;
+}
+
+static int mp_wait_modem_status(struct sb_uart_state *state, unsigned long arg)
+{
+        struct sb_uart_port *port = state->port;
+        DECLARE_WAITQUEUE(wait, current);
+        struct sb_uart_icount cprev, cnow;
+        int ret;
+
+        spin_lock_irq(&port->lock);
+        memcpy(&cprev, &port->icount, sizeof(struct sb_uart_icount));
+
+        port->ops->enable_ms(port);
+        spin_unlock_irq(&port->lock);
+
+        add_wait_queue(&state->info->delta_msr_wait, &wait);
+        for (;;) {
+                spin_lock_irq(&port->lock);
+                memcpy(&cnow, &port->icount, sizeof(struct sb_uart_icount));
+                spin_unlock_irq(&port->lock);
+
+                set_current_state(TASK_INTERRUPTIBLE);
+
+                if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
+                                ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
+                                ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
+                                ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
+                        ret = 0;
+                        break;
+                }
+
+                schedule();
+
+                if (signal_pending(current)) {
+                        ret = -ERESTARTSYS;
+                        break;
+                }
+
+                cprev = cnow;
+        }
+
+        current->state = TASK_RUNNING;
+        remove_wait_queue(&state->info->delta_msr_wait, &wait);
+
+        return ret;
+}
+
+static int mp_get_count(struct sb_uart_state *state, struct serial_icounter_struct *icnt)
+{
+        struct serial_icounter_struct icount;
+        struct sb_uart_icount cnow;
+        struct sb_uart_port *port = state->port;
+
+        spin_lock_irq(&port->lock);
+        memcpy(&cnow, &port->icount, sizeof(struct sb_uart_icount));
+        spin_unlock_irq(&port->lock);
+
+        icount.cts         = cnow.cts;
+        icount.dsr         = cnow.dsr;
+        icount.rng         = cnow.rng;
+        icount.dcd         = cnow.dcd;
+        icount.rx          = cnow.rx;
+        icount.tx          = cnow.tx;
+        icount.frame       = cnow.frame;
+        icount.overrun     = cnow.overrun;
+        icount.parity      = cnow.parity;
+        icount.brk         = cnow.brk;
+        icount.buf_overrun = cnow.buf_overrun;
+
+        return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
+}
+
+static int mp_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
+{
+        struct sb_uart_state *state = tty->driver_data;
+        struct mp_port *info = (struct mp_port *)state->port;
+        int ret = -ENOIOCTLCMD;
+
+
+        switch (cmd) {
+                case TIOCSMULTIDROP:
+                        /* set multi-drop mode enable or disable, and default operation mode is H/W mode */
+                        if (info->port.type == PORT_16C105XA)
+                        {
+                                //arg &= ~0x6;
+                                //state->port->mdmode = 0;
+                                return set_multidrop_mode((struct sb_uart_port *)info, (unsigned int)arg);
+                        }
+                        ret = -ENOTSUPP;
+                        break;
+                case GETDEEPFIFO:
+                        ret = get_deep_fifo(state->port);
+                        return ret;
+                case SETDEEPFIFO:
+                        ret = set_deep_fifo(state->port,arg);
+                        deep[state->port->line] = arg;
+                        return ret;
+                case SETTTR:
+                        if (info->port.type == PORT_16C105X || info->port.type == PORT_16C105XA){
+                                ret = sb1054_set_register(state->port,PAGE_4,SB105X_TTR,arg);
+                                ttr[state->port->line] = arg;
+                        }
+                        return ret;
+                case SETRTR:
+                        if (info->port.type == PORT_16C105X || info->port.type == PORT_16C105XA){
+                                ret = sb1054_set_register(state->port,PAGE_4,SB105X_RTR,arg);
+                                rtr[state->port->line] = arg;
+                        }
+                        return ret;
+                case GETTTR:
+                        if (info->port.type == PORT_16C105X || info->port.type == PORT_16C105XA){
+                                ret = sb1054_get_register(state->port,PAGE_4,SB105X_TTR);
+                        }
+                        return ret;
+                case GETRTR:
+                        if (info->port.type == PORT_16C105X || info->port.type == PORT_16C105XA){
+                                ret = sb1054_get_register(state->port,PAGE_4,SB105X_RTR);
+                        }
+                        return ret;
+
+                case SETFCR:
+                        if (info->port.type == PORT_16C105X || info->port.type == PORT_16C105XA){
+                                ret = sb1054_set_register(state->port,PAGE_1,SB105X_FCR,arg);
+                        }
+                        else{
+                                serial_out(info,2,arg);
+                        }
+
+                        return ret;
+                case TIOCSMDADDR:
+                        /* set multi-drop address */
+                        if (info->port.type == PORT_16C105XA)
+                        {
+                                state->port->mdmode |= MDMODE_ADDR;
+                                return set_multidrop_addr((struct sb_uart_port *)info, (unsigned int)arg);
+                        }
+                        ret = -ENOTSUPP;
+                        break;
+
+                case TIOCGMDADDR:
+                        /* set multi-drop address */
+                        if ((info->port.type == PORT_16C105XA) && (state->port->mdmode & MDMODE_ADDR))
+                        {
+                                return get_multidrop_addr((struct sb_uart_port *)info);
+                        }
+                        ret = -ENOTSUPP;
+                        break;
+
+                case TIOCSENDADDR:
+                        /* send address in multi-drop mode */
+                        if ((info->port.type == PORT_16C105XA) 
+                                        && (state->port->mdmode & (MDMODE_ENABLE)))
+                        {
+                                if (mp_chars_in_buffer(tty) > 0)
+                                {
+                                        tty_wait_until_sent(tty, 0);
+                                }
+                                //while ((serial_in(info, UART_LSR) & 0x60) != 0x60);
+                                //while (sb1054_get_register(state->port, PAGE_2, SB105X_TFCR) != 0);
+                                while ((serial_in(info, UART_LSR) & 0x60) != 0x60);
+                                serial_out(info, UART_SCR, (int)arg);
+                        }
+                        break;
+
+                case TIOCGSERIAL:
+                        ret = mp_get_info(state, (struct serial_struct *)arg);
+                        break;
+
+                case TIOCSSERIAL:
+                        ret = mp_set_info(state, (struct serial_struct *)arg);
+                        break;
+
+                case TIOCSERCONFIG:
+                        ret = mp_do_autoconfig(state);
+                        break;
+
+                case TIOCSERGWILD: /* obsolete */
+                case TIOCSERSWILD: /* obsolete */
+                        ret = 0;
+                        break;
+                        /* for Multiport */
+                case TIOCGNUMOFPORT: /* Get number of ports */
+                        return NR_PORTS;
+                case TIOCGGETDEVID:
+                        return mp_devs[arg].device_id;
+                case TIOCGGETREV:
+                        return mp_devs[arg].revision;
+                case TIOCGGETNRPORTS:
+                        return mp_devs[arg].nr_ports;
+                case TIOCGGETBDNO:
+                        return NR_BOARD;
+                case TIOCGGETINTERFACE:
+                        if (mp_devs[arg].revision == 0xc0)
+                        {
+                                /* for SB16C1053APCI */
+                                return (sb1053a_get_interface(info, info->port.line));
+                        }
+                        else
+                        {
+                                return (inb(mp_devs[arg].option_reg_addr+MP_OPTR_IIR0+(state->port->line/8)));
+                        }
+                case TIOCGGETPORTTYPE:
+                        ret = get_device_type(arg);;
+                        return ret;
+                case TIOCSMULTIECHO: /* set to multi-drop mode(RS422) or echo mode(RS485)*/
+                        outb( ( inb(info->interface_config_addr) & ~0x03 ) | 0x01 ,  
+                                        info->interface_config_addr);
+                        return 0;
+                case TIOCSPTPNOECHO: /* set to multi-drop mode(RS422) or echo mode(RS485) */
+                        outb( ( inb(info->interface_config_addr) & ~0x03 )  ,             
+                                        info->interface_config_addr);
+                        return 0;
+        }
+
+        if (ret != -ENOIOCTLCMD)
+                goto out;
+
+        if (tty->flags & (1 << TTY_IO_ERROR)) {
+                ret = -EIO;
+                goto out;
+        }
+
+        switch (cmd) {
+                case TIOCMIWAIT:
+                        ret = mp_wait_modem_status(state, arg);
+                        break;
+
+                case TIOCGICOUNT:
+                        ret = mp_get_count(state, (struct serial_icounter_struct *)arg);
+                        break;
+        }
+
+        if (ret != -ENOIOCTLCMD)
+                goto out;
+
+        MP_STATE_LOCK(state);
+        switch (cmd) {
+                case TIOCSERGETLSR: /* Get line status register */
+                        ret = mp_get_lsr_info(state, (unsigned int *)arg);
+                        break;
+
+                default: {
+                                        struct sb_uart_port *port = state->port;
+                                        if (port->ops->ioctl)
+                                                ret = port->ops->ioctl(port, cmd, arg);
+                                        break;
+                                }
+        }
+
+        MP_STATE_UNLOCK(state);
+out:
+        return ret;
+}
+
+static void mp_set_termios(struct tty_struct *tty, struct MP_TERMIOS *old_termios)
+{
+        struct sb_uart_state *state = tty->driver_data;
+        unsigned long flags;
+        unsigned int cflag = tty->termios.c_cflag;
+
+#define RELEVANT_IFLAG(iflag)   ((iflag) & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
+
+        if ((cflag ^ old_termios->c_cflag) == 0 &&
+                        RELEVANT_IFLAG(tty->termios.c_iflag ^ old_termios->c_iflag) == 0)
+                return;
+
+        mp_change_speed(state, old_termios);
+
+        if ((old_termios->c_cflag & CBAUD) && !(cflag & CBAUD))
+                uart_clear_mctrl(state->port, TIOCM_RTS | TIOCM_DTR);
+
+        if (!(old_termios->c_cflag & CBAUD) && (cflag & CBAUD)) {
+                unsigned int mask = TIOCM_DTR;
+                if (!(cflag & CRTSCTS) ||
+                                !test_bit(TTY_THROTTLED, &tty->flags))
+                        mask |= TIOCM_RTS;
+                uart_set_mctrl(state->port, mask);
+        }
+
+        if ((old_termios->c_cflag & CRTSCTS) && !(cflag & CRTSCTS)) {
+                spin_lock_irqsave(&state->port->lock, flags);
+                tty->hw_stopped = 0;
+                __mp_start(tty);
+                spin_unlock_irqrestore(&state->port->lock, flags);
+        }
+
+        if (!(old_termios->c_cflag & CRTSCTS) && (cflag & CRTSCTS)) {
+                spin_lock_irqsave(&state->port->lock, flags);
+                if (!(state->port->ops->get_mctrl(state->port) & TIOCM_CTS)) {
+                        tty->hw_stopped = 1;
+                        state->port->ops->stop_tx(state->port);
+                }
+                spin_unlock_irqrestore(&state->port->lock, flags);
+        }
+}
+
+static void mp_close(struct tty_struct *tty, struct file *filp)
+{
+        struct sb_uart_state *state = tty->driver_data;
+        struct sb_uart_port *port;
+
+        printk("mp_close!\n");
+        if (!state || !state->port)
+                return;
+
+        port = state->port;
+
+        printk("close1 %d\n", __LINE__);
+        MP_STATE_LOCK(state);
+
+        printk("close2 %d\n", __LINE__);
+        if (tty_hung_up_p(filp))
+                goto done;
+
+        printk("close3 %d\n", __LINE__);
+        if ((tty->count == 1) && (state->count != 1)) {
+                printk("mp_close: bad serial port count; tty->count is 1, "
+                                "state->count is %d\n", state->count);
+                state->count = 1;
+        }
+        printk("close4 %d\n", __LINE__);
+        if (--state->count < 0) {
+                printk("rs_close: bad serial port count for ttyMP%d: %d\n",
+                                port->line, state->count);
+                state->count = 0;
+        }
+        if (state->count)
+                goto done;
+
+        tty->closing = 1;
+
+        printk("close5 %d\n", __LINE__);
+        if (state->closing_wait != USF_CLOSING_WAIT_NONE)
+                tty_wait_until_sent(tty, state->closing_wait);
+
+        printk("close6 %d\n", __LINE__);
+        if (state->info->flags & UIF_INITIALIZED) {
+                unsigned long flags;
+                spin_lock_irqsave(&port->lock, flags);
+                port->ops->stop_rx(port);
+                spin_unlock_irqrestore(&port->lock, flags);
+                mp_wait_until_sent(tty, port->timeout);
+        }
+        printk("close7 %d\n", __LINE__);
+
+        mp_shutdown(state);
+        printk("close8 %d\n", __LINE__);
+        mp_flush_buffer(tty);
+        tty_ldisc_flush(tty);
+        tty->closing = 0;
+        state->info->tty = NULL;
+        if (state->info->blocked_open) 
+        {
+                if (state->close_delay)
+                {
+                        set_current_state(TASK_INTERRUPTIBLE);
+                        schedule_timeout(state->close_delay);
+                }
+        }
+        else
+        {
+                mp_change_pm(state, 3);
+        }
+        printk("close8 %d\n", __LINE__);
+
+        state->info->flags &= ~UIF_NORMAL_ACTIVE;
+        wake_up_interruptible(&state->info->open_wait);
+
+done:
+        printk("close done\n");
+        MP_STATE_UNLOCK(state);
+        module_put(THIS_MODULE);
+}
+
+static void mp_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+        struct sb_uart_state *state = tty->driver_data;
+        struct sb_uart_port *port = state->port;
+        unsigned long char_time, expire;
+
+        if (port->type == PORT_UNKNOWN || port->fifosize == 0)
+                return;
+
+        char_time = (port->timeout - HZ/50) / port->fifosize;
+        char_time = char_time / 5;
+        if (char_time == 0)
+                char_time = 1;
+        if (timeout && timeout < char_time)
+                char_time = timeout;
+
+        if (timeout == 0 || timeout > 2 * port->timeout)
+                timeout = 2 * port->timeout;
+
+        expire = jiffies + timeout;
+
+        while (!port->ops->tx_empty(port)) {
+                set_current_state(TASK_INTERRUPTIBLE);
+                schedule_timeout(char_time);
+                if (signal_pending(current))
+                        break;
+                if (time_after(jiffies, expire))
+                        break;
+        }
+        set_current_state(TASK_RUNNING); /* might not be needed */
+}
+
+static void mp_hangup(struct tty_struct *tty)
+{
+        struct sb_uart_state *state = tty->driver_data;
+
+        MP_STATE_LOCK(state);
+        if (state->info && state->info->flags & UIF_NORMAL_ACTIVE) {
+                mp_flush_buffer(tty);
+                mp_shutdown(state);
+                state->count = 0;
+                state->info->flags &= ~UIF_NORMAL_ACTIVE;
+                state->info->tty = NULL;
+                wake_up_interruptible(&state->info->open_wait);
+                wake_up_interruptible(&state->info->delta_msr_wait);
+        }
+        MP_STATE_UNLOCK(state);
+}
+
+static void mp_update_termios(struct sb_uart_state *state)
+{
+        struct tty_struct *tty = state->info->tty;
+        struct sb_uart_port *port = state->port;
+
+        if (!(tty->flags & (1 << TTY_IO_ERROR))) {
+                mp_change_speed(state, NULL);
+
+                if (tty->termios.c_cflag & CBAUD)
+                        uart_set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
+        }
+}
+
+static int mp_block_til_ready(struct file *filp, struct sb_uart_state *state)
+{
+        DECLARE_WAITQUEUE(wait, current);
+        struct sb_uart_info *info = state->info;
+        struct sb_uart_port *port = state->port;
+        unsigned int mctrl;
+
+        info->blocked_open++;
+        state->count--;
+
+        add_wait_queue(&info->open_wait, &wait);
+        while (1) {
+                set_current_state(TASK_INTERRUPTIBLE);
+
+                if (tty_hung_up_p(filp) || info->tty == NULL)
+                        break;
+
+                if (!(info->flags & UIF_INITIALIZED))
+                        break;
+
+                if ((filp->f_flags & O_NONBLOCK) ||
+                                (info->tty->termios.c_cflag & CLOCAL) ||
+                                (info->tty->flags & (1 << TTY_IO_ERROR))) {
+                        break;
+                }
+
+                if (info->tty->termios.c_cflag & CBAUD)
+                        uart_set_mctrl(port, TIOCM_DTR);
+
+                spin_lock_irq(&port->lock);
+                port->ops->enable_ms(port);
+                mctrl = port->ops->get_mctrl(port);
+                spin_unlock_irq(&port->lock);
+                if (mctrl & TIOCM_CAR)
+                        break;
+
+                MP_STATE_UNLOCK(state);
+                schedule();
+                MP_STATE_LOCK(state);
+
+                if (signal_pending(current))
+                        break;
+        }
+        set_current_state(TASK_RUNNING);
+        remove_wait_queue(&info->open_wait, &wait);
+
+        state->count++;
+        info->blocked_open--;
+
+        if (signal_pending(current))
+                return -ERESTARTSYS;
+
+        if (!info->tty || tty_hung_up_p(filp))
+                return -EAGAIN;
+
+        return 0;
+}
+
+static struct sb_uart_state *uart_get(struct uart_driver *drv, int line)
+{
+        struct sb_uart_state *state;
+
+        MP_MUTEX_LOCK(mp_mutex);
+        state = drv->state + line;
+        if (mutex_lock_interruptible(&state->mutex)) {
+                state = ERR_PTR(-ERESTARTSYS);
+                goto out;
+        }
+        state->count++;
+        if (!state->port) {
+                state->count--;
+                MP_STATE_UNLOCK(state);
+                state = ERR_PTR(-ENXIO);
+                goto out;
+        }
+
+        if (!state->info) {
+                state->info = kmalloc(sizeof(struct sb_uart_info), GFP_KERNEL);
+                if (state->info) {
+                        memset(state->info, 0, sizeof(struct sb_uart_info));
+                        init_waitqueue_head(&state->info->open_wait);
+                        init_waitqueue_head(&state->info->delta_msr_wait);
+
+                        state->port->info = state->info;
+
+                        tasklet_init(&state->info->tlet, mp_tasklet_action,
+                                        (unsigned long)state);
+                } else {
+                        state->count--;
+                        MP_STATE_UNLOCK(state);
+                        state = ERR_PTR(-ENOMEM);
+                }
+        }
+
+out:
+        MP_MUTEX_UNLOCK(mp_mutex);
+        return state;
+}
+
+static int mp_open(struct tty_struct *tty, struct file *filp)
+{
+        struct uart_driver *drv = (struct uart_driver *)tty->driver->driver_state;
+        struct sb_uart_state *state;
+        int retval;
+        int  line = tty->index;
+        struct mp_port *mtpt;
+
+        retval = -ENODEV;
+        if (line >= tty->driver->num)
+                goto fail;
+
+        state = uart_get(drv, line);
+
+        mtpt  = (struct mp_port *)state->port;
+
+        if (IS_ERR(state)) {
+                retval = PTR_ERR(state);
+                goto fail;
+        }
+
+        tty->driver_data = state;
+        tty->low_latency = (state->port->flags & UPF_LOW_LATENCY) ? 1 : 0;
+        tty->alt_speed = 0;
+        state->info->tty = tty;
+
+        if (tty_hung_up_p(filp)) {
+                retval = -EAGAIN;
+                state->count--;
+                MP_STATE_UNLOCK(state);
+                goto fail;
+        }
+
+        if (state->count == 1)
+                mp_change_pm(state, 0);
+
+        retval = mp_startup(state, 0);
+
+        if (retval == 0)
+                retval = mp_block_til_ready(filp, state);
+        MP_STATE_UNLOCK(state);
+
+        if (retval == 0 && !(state->info->flags & UIF_NORMAL_ACTIVE)) {
+                state->info->flags |= UIF_NORMAL_ACTIVE;
+
+                mp_update_termios(state);
+        }
+
+        uart_clear_mctrl(state->port, TIOCM_RTS);
+        try_module_get(THIS_MODULE);
+fail:
+        return retval;
+}
+
+
+static const char *mp_type(struct sb_uart_port *port)
+{
+        const char *str = NULL;
+
+        if (port->ops->type)
+                str = port->ops->type(port);
+
+        if (!str)
+                str = "unknown";
+
+        return str;
+}
+
+static void mp_change_pm(struct sb_uart_state *state, int pm_state)
+{
+        struct sb_uart_port *port = state->port;
+        if (port->ops->pm)
+                port->ops->pm(port, pm_state, state->pm_state);
+        state->pm_state = pm_state;
+}
+
+static inline void mp_report_port(struct uart_driver *drv, struct sb_uart_port *port)
+{
+        char address[64];
+
+        switch (port->iotype) {
+                case UPIO_PORT:
+                        snprintf(address, sizeof(address),"I/O 0x%x", port->iobase);
+                        break;
+                case UPIO_HUB6:
+                        snprintf(address, sizeof(address),"I/O 0x%x offset 0x%x", port->iobase, port->hub6);
+                        break;
+                case UPIO_MEM:
+                        snprintf(address, sizeof(address),"MMIO 0x%lx", port->mapbase);
+                        break;
+                default:
+                        snprintf(address, sizeof(address),"*unknown*" );
+                        strlcpy(address, "*unknown*", sizeof(address));
+                        break;
+        }
+
+        printk( "%s%d at %s (irq = %d) is a %s\n",
+                        drv->dev_name, port->line, address, port->irq, mp_type(port));
+
+}
+
+static void mp_configure_port(struct uart_driver *drv, struct sb_uart_state *state, struct sb_uart_port *port)
+{
+        unsigned int flags;
+
+
+        if (!port->iobase && !port->mapbase && !port->membase)
+        {
+                DPRINTK("%s error \n",__FUNCTION__);
+                return;
+        }
+        flags = UART_CONFIG_TYPE;
+        if (port->flags & UPF_AUTO_IRQ)
+                flags |= UART_CONFIG_IRQ;
+        if (port->flags & UPF_BOOT_AUTOCONF) {
+                port->type = PORT_UNKNOWN;
+                port->ops->config_port(port, flags);
+        }
+
+        if (port->type != PORT_UNKNOWN) {
+                unsigned long flags;
+
+                mp_report_port(drv, port);
+
+                spin_lock_irqsave(&port->lock, flags);
+                port->ops->set_mctrl(port, 0);
+                spin_unlock_irqrestore(&port->lock, flags);
+
+                mp_change_pm(state, 3);
+        }
+}
+
+static void mp_unconfigure_port(struct uart_driver *drv, struct sb_uart_state *state)
+{
+        struct sb_uart_port *port = state->port;
+        struct sb_uart_info *info = state->info;
+
+        if (info && info->tty)
+                tty_hangup(info->tty);
+
+        MP_STATE_LOCK(state);
+
+        state->info = NULL;
+
+        if (port->type != PORT_UNKNOWN)
+                port->ops->release_port(port);
+
+        port->type = PORT_UNKNOWN;
+
+        if (info) {
+                tasklet_kill(&info->tlet);
+                kfree(info);
+        }
+
+        MP_STATE_UNLOCK(state);
+}
+static struct tty_operations mp_ops = {
+        .open           = mp_open,
+        .close          = mp_close,
+        .write          = mp_write,
+        .put_char       = mp_put_char,
+        .flush_chars    = mp_put_chars,
+        .write_room     = mp_write_room,
+        .chars_in_buffer= mp_chars_in_buffer,
+        .flush_buffer   = mp_flush_buffer,
+        .ioctl          = mp_ioctl,
+        .throttle       = mp_throttle,
+        .unthrottle     = mp_unthrottle,
+        .send_xchar     = mp_send_xchar,
+        .set_termios    = mp_set_termios,
+        .stop           = mp_stop,
+        .start          = mp_start,
+        .hangup         = mp_hangup,
+        .break_ctl      = mp_break_ctl,
+        .wait_until_sent= mp_wait_until_sent,
+#ifdef CONFIG_PROC_FS
+        .proc_fops      = NULL,
+#endif
+        .tiocmget       = mp_tiocmget,
+        .tiocmset       = mp_tiocmset,
+};
+
+static int mp_register_driver(struct uart_driver *drv)
+{
+        struct tty_driver *normal = NULL;
+        int i, retval;
+
+        drv->state = kmalloc(sizeof(struct sb_uart_state) * drv->nr, GFP_KERNEL);
+        retval = -ENOMEM;
+        if (!drv->state)
+        {
+                printk("SB PCI Error: Kernel memory allocation error!\n");
+                goto out;
+        }
+        memset(drv->state, 0, sizeof(struct sb_uart_state) * drv->nr);
+
+        normal = alloc_tty_driver(drv->nr);
+        if (!normal)
+        {
+                printk("SB PCI Error: tty allocation error!\n");
+                goto out;
+        }
+
+        drv->tty_driver = normal;
+
+        normal->owner           = drv->owner;
+        normal->magic           = TTY_DRIVER_MAGIC;
+        normal->driver_name     = drv->driver_name;
+        normal->name            = drv->dev_name;
+        normal->major           = drv->major;
+        normal->minor_start     = drv->minor;
+
+        normal->num             = MAX_MP_PORT ; 
+
+        normal->type            = TTY_DRIVER_TYPE_SERIAL;
+        normal->subtype         = SERIAL_TYPE_NORMAL;
+        normal->init_termios    = tty_std_termios;
+        normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+        normal->flags           = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+        normal->driver_state    = drv;
+
+        tty_set_operations(normal, &mp_ops);
+
+for (i = 0; i < drv->nr; i++) {
+        struct sb_uart_state *state = drv->state + i;
+
+        state->close_delay     = 500;   
+        state->closing_wait    = 30000; 
+
+        mutex_init(&state->mutex);
+        }
+
+        retval = tty_register_driver(normal);
+out:
+        if (retval < 0) {
+                printk("Register tty driver Fail!\n");
+                put_tty_driver(normal);
+                kfree(drv->state);
+        }
+
+        return retval;
+}
+
+void mp_unregister_driver(struct uart_driver *drv)
+{
+    struct tty_driver *normal = NULL;
+
+    normal = drv->tty_driver;
+
+    if (!normal)
+    {
+        return;
+    }
+
+    tty_unregister_driver(normal);
+    put_tty_driver(normal);
+    drv->tty_driver = NULL;
+
+
+    if (drv->state)
+    {
+        kfree(drv->state);
+    }
+
+}
+
+static int mp_add_one_port(struct uart_driver *drv, struct sb_uart_port *port)
+{
+        struct sb_uart_state *state;
+        int ret = 0;
+
+
+        if (port->line >= drv->nr)
+                return -EINVAL;
+
+        state = drv->state + port->line;
+
+        MP_MUTEX_LOCK(mp_mutex);
+        if (state->port) {
+                ret = -EINVAL;
+                goto out;
+        }
+
+        state->port = port;
+
+        spin_lock_init(&port->lock);
+        port->cons = drv->cons;
+        port->info = state->info;
+
+        mp_configure_port(drv, state, port);
+
+        tty_register_device(drv->tty_driver, port->line, port->dev);
+
+out:
+        MP_MUTEX_UNLOCK(mp_mutex);
+
+
+        return ret;
+}
+
+static int mp_remove_one_port(struct uart_driver *drv, struct sb_uart_port *port)
+{
+        struct sb_uart_state *state = drv->state + port->line;
+
+        if (state->port != port)
+                printk(KERN_ALERT "Removing wrong port: %p != %p\n",
+                                state->port, port);
+
+        MP_MUTEX_LOCK(mp_mutex);
+
+        tty_unregister_device(drv->tty_driver, port->line);
+
+        mp_unconfigure_port(drv, state);
+        state->port = NULL;
+        MP_MUTEX_UNLOCK(mp_mutex);
+
+        return 0;
+}
+
+static void autoconfig(struct mp_port *mtpt, unsigned int probeflags)
+{
+        unsigned char status1, scratch, scratch2, scratch3;
+        unsigned char save_lcr, save_mcr;
+        unsigned long flags;
+
+        unsigned char u_type;
+        unsigned char b_ret = 0;
+
+        if (!mtpt->port.iobase && !mtpt->port.mapbase && !mtpt->port.membase)
+                return;
+
+        DEBUG_AUTOCONF("ttyMP%d: autoconf (0x%04x, 0x%p): ",
+                        mtpt->port.line, mtpt->port.iobase, mtpt->port.membase);
+
+        spin_lock_irqsave(&mtpt->port.lock, flags);
+
+        if (!(mtpt->port.flags & UPF_BUGGY_UART)) {
+                scratch = serial_inp(mtpt, UART_IER);
+                serial_outp(mtpt, UART_IER, 0);
+#ifdef __i386__
+                outb(0xff, 0x080);
+#endif
+                scratch2 = serial_inp(mtpt, UART_IER) & 0x0f;
+                serial_outp(mtpt, UART_IER, 0x0F);
+#ifdef __i386__
+                outb(0, 0x080);
+#endif
+                scratch3 = serial_inp(mtpt, UART_IER) & 0x0F;
+                serial_outp(mtpt, UART_IER, scratch);
+                if (scratch2 != 0 || scratch3 != 0x0F) {
+                        DEBUG_AUTOCONF("IER test failed (%02x, %02x) ",
+                                        scratch2, scratch3);
+                        goto out;
+                }
+        }
+
+        save_mcr = serial_in(mtpt, UART_MCR);
+        save_lcr = serial_in(mtpt, UART_LCR);
+
+        if (!(mtpt->port.flags & UPF_SKIP_TEST)) {
+                serial_outp(mtpt, UART_MCR, UART_MCR_LOOP | 0x0A);
+                status1 = serial_inp(mtpt, UART_MSR) & 0xF0;
+                serial_outp(mtpt, UART_MCR, save_mcr);
+                if (status1 != 0x90) {
+                        DEBUG_AUTOCONF("LOOP test failed (%02x) ",
+                                        status1);
+                        goto out;
+                }
+        }
+
+        serial_outp(mtpt, UART_LCR, 0xBF);
+        serial_outp(mtpt, UART_EFR, 0);
+        serial_outp(mtpt, UART_LCR, 0);
+
+        serial_outp(mtpt, UART_FCR, UART_FCR_ENABLE_FIFO);
+        scratch = serial_in(mtpt, UART_IIR) >> 6;
+
+        DEBUG_AUTOCONF("iir=%d ", scratch);
+        if(mtpt->device->nr_ports >= 8)
+                b_ret = read_option_register(mtpt,(MP_OPTR_DIR0 + ((mtpt->port.line)/8)));
+        else    
+                b_ret = read_option_register(mtpt,MP_OPTR_DIR0);
+        u_type = (b_ret & 0xf0) >> 4;
+        if(mtpt->port.type == PORT_UNKNOWN )
+        {
+                switch (u_type)
+                {
+                        case DIR_UART_16C550:
+                                mtpt->port.type = PORT_16C55X;
+                                break;
+                        case DIR_UART_16C1050:
+                                mtpt->port.type = PORT_16C105X;
+                                break;
+                        case DIR_UART_16C1050A:
+                                if (mtpt->port.line < 2)
+                                {
+                                        mtpt->port.type = PORT_16C105XA;
+                                }
+                                else
+                                {
+                                        if (mtpt->device->device_id & 0x50)
+                                        {
+                                                mtpt->port.type = PORT_16C55X;
+                                        }
+                                        else
+                                        {
+                                                mtpt->port.type = PORT_16C105X;
+                                        }
+                                }
+                                break;
+                        default:        
+                                mtpt->port.type = PORT_UNKNOWN;
+                                break;
+                }
+        }
+
+        if(mtpt->port.type == PORT_UNKNOWN )
+        {
+printk("unknow2\n");
+                switch (scratch) {
+                        case 0:
+                        case 1:
+                                mtpt->port.type = PORT_UNKNOWN;
+                                break;
+                        case 2:
+                        case 3:
+                                mtpt->port.type = PORT_16C55X;
+                                break;
+                }
+        }
+
+        serial_outp(mtpt, UART_LCR, save_lcr);
+
+        mtpt->port.fifosize = uart_config[mtpt->port.type].dfl_xmit_fifo_size;
+        mtpt->capabilities = uart_config[mtpt->port.type].flags;
+
+        if (mtpt->port.type == PORT_UNKNOWN)
+                goto out;
+        serial_outp(mtpt, UART_MCR, save_mcr);
+        serial_outp(mtpt, UART_FCR, (UART_FCR_ENABLE_FIFO |
+                                UART_FCR_CLEAR_RCVR |
+                                UART_FCR_CLEAR_XMIT));
+        serial_outp(mtpt, UART_FCR, 0);
+        (void)serial_in(mtpt, UART_RX);
+        serial_outp(mtpt, UART_IER, 0);
+
+out:
+        spin_unlock_irqrestore(&mtpt->port.lock, flags);
+        DEBUG_AUTOCONF("type=%s\n", uart_config[mtpt->port.type].name);
+}
+
+static void autoconfig_irq(struct mp_port *mtpt)
+{
+        unsigned char save_mcr, save_ier;
+        unsigned long irqs;
+        int irq;
+
+        /* forget possible initially masked and pending IRQ */
+        probe_irq_off(probe_irq_on());
+        save_mcr = serial_inp(mtpt, UART_MCR);
+        save_ier = serial_inp(mtpt, UART_IER);
+        serial_outp(mtpt, UART_MCR, UART_MCR_OUT1 | UART_MCR_OUT2);
+
+        irqs = probe_irq_on();
+        serial_outp(mtpt, UART_MCR, 0);
+        serial_outp(mtpt, UART_MCR,
+                UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2);
+
+        serial_outp(mtpt, UART_IER, 0x0f);    /* enable all intrs */
+        (void)serial_inp(mtpt, UART_LSR);
+        (void)serial_inp(mtpt, UART_RX);
+        (void)serial_inp(mtpt, UART_IIR);
+        (void)serial_inp(mtpt, UART_MSR);
+        serial_outp(mtpt, UART_TX, 0xFF);
+        irq = probe_irq_off(irqs);
+
+        serial_outp(mtpt, UART_MCR, save_mcr);
+        serial_outp(mtpt, UART_IER, save_ier);
+
+        mtpt->port.irq = (irq > 0) ? irq : 0;
+}
+
+static void multi_stop_tx(struct sb_uart_port *port)
+{
+        struct mp_port *mtpt = (struct mp_port *)port;
+
+        if (mtpt->ier & UART_IER_THRI) {
+                mtpt->ier &= ~UART_IER_THRI;
+                serial_out(mtpt, UART_IER, mtpt->ier);
+        }
+
+        tasklet_schedule(&port->info->tlet);
+}
+
+static void multi_start_tx(struct sb_uart_port *port)
+{
+        struct mp_port *mtpt = (struct mp_port *)port;
+
+        if (!(mtpt->ier & UART_IER_THRI)) {
+                mtpt->ier |= UART_IER_THRI;
+                serial_out(mtpt, UART_IER, mtpt->ier);
+        }
+}
+
+static void multi_stop_rx(struct sb_uart_port *port)
+{
+        struct mp_port *mtpt = (struct mp_port *)port;
+
+        mtpt->ier &= ~UART_IER_RLSI;
+        mtpt->port.read_status_mask &= ~UART_LSR_DR;
+        serial_out(mtpt, UART_IER, mtpt->ier);
+}
+
+static void multi_enable_ms(struct sb_uart_port *port)
+{
+        struct mp_port *mtpt = (struct mp_port *)port;
+
+        mtpt->ier |= UART_IER_MSI;
+        serial_out(mtpt, UART_IER, mtpt->ier);
+}
+
+
+static _INLINE_ void receive_chars(struct mp_port *mtpt, int *status )
+{
+        struct tty_struct *tty = mtpt->port.info->tty;
+        unsigned char lsr = *status;
+        int max_count = 256;
+        unsigned char ch;
+        char flag;
+
+        //lsr &= mtpt->port.read_status_mask;
+
+        do {
+                if ((lsr & UART_LSR_PE) && (mtpt->port.mdmode & MDMODE_ENABLE))
+                {
+                        ch = serial_inp(mtpt, UART_RX);
+                }
+                else if (lsr & UART_LSR_SPECIAL) 
+                {
+                        flag = 0;
+                        ch = serial_inp(mtpt, UART_RX);
+
+                        if (lsr & UART_LSR_BI) 
+                        {
+
+                                mtpt->port.icount.brk++;
+                                flag = TTY_BREAK;
+
+                                if (sb_uart_handle_break(&mtpt->port))
+                                        goto ignore_char;
+                        } 
+                        if (lsr & UART_LSR_PE)
+                        {
+                                mtpt->port.icount.parity++;
+                                flag = TTY_PARITY;
+                        }
+                        if (lsr & UART_LSR_FE)
+                        {
+                                mtpt->port.icount.frame++;
+                                flag = TTY_FRAME;
+                        }
+                        if (lsr & UART_LSR_OE)
+                        {
+                                mtpt->port.icount.overrun++;
+                                flag = TTY_OVERRUN;
+                        }
+                        tty_insert_flip_char(tty, ch, flag);
+                }
+                else
+                {
+                        ch = serial_inp(mtpt, UART_RX);
+                        tty_insert_flip_char(tty, ch, 0);
+                }
+ignore_char:
+                lsr = serial_inp(mtpt, UART_LSR);
+        } while ((lsr & UART_LSR_DR) && (max_count-- > 0));
+
+        tty_flip_buffer_push(tty);
+}
+
+
+
+
+static _INLINE_ void transmit_chars(struct mp_port *mtpt)
+{
+        struct circ_buf *xmit = &mtpt->port.info->xmit;
+        int count;
+
+        if (mtpt->port.x_char) {
+                serial_outp(mtpt, UART_TX, mtpt->port.x_char);
+                mtpt->port.icount.tx++;
+                mtpt->port.x_char = 0;
+                return;
+        }
+        if (uart_circ_empty(xmit) || uart_tx_stopped(&mtpt->port)) {
+                multi_stop_tx(&mtpt->port);
+                return;
+        }
+
+        count = uart_circ_chars_pending(xmit);
+
+        if(count > mtpt->port.fifosize)
+        {
+                count = mtpt->port.fifosize;
+        }
+
+        printk("[%d] mdmode: %x\n", mtpt->port.line, mtpt->port.mdmode);
+        do {
+#if 0
+                /* check multi-drop mode */
+                if ((mtpt->port.mdmode & (MDMODE_ENABLE | MDMODE_ADDR)) == (MDMODE_ENABLE | MDMODE_ADDR))
+                {
+                        printk("send address\n");
+                        /* send multi-drop address */
+                        serial_out(mtpt, UART_SCR, xmit->buf[xmit->tail]);
+                }
+                else
+#endif
+                {
+                        serial_out(mtpt, UART_TX, xmit->buf[xmit->tail]);
+                }
+                xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+                mtpt->port.icount.tx++;
+        } while (--count > 0);
+}
+
+
+
+static _INLINE_ void check_modem_status(struct mp_port *mtpt)
+{
+        int status;
+
+        status = serial_in(mtpt, UART_MSR);
+
+        if ((status & UART_MSR_ANY_DELTA) == 0)
+                return;
+
+        if (status & UART_MSR_TERI)
+                mtpt->port.icount.rng++;
+        if (status & UART_MSR_DDSR)
+                mtpt->port.icount.dsr++;
+        if (status & UART_MSR_DDCD)
+                sb_uart_handle_dcd_change(&mtpt->port, status & UART_MSR_DCD);
+        if (status & UART_MSR_DCTS)
+                sb_uart_handle_cts_change(&mtpt->port, status & UART_MSR_CTS);
+
+        wake_up_interruptible(&mtpt->port.info->delta_msr_wait);
+}
+
+static inline void multi_handle_port(struct mp_port *mtpt)
+{
+        unsigned int status = serial_inp(mtpt, UART_LSR);
+
+        //printk("lsr: %x\n", status);
+
+        if ((status & UART_LSR_DR) || (status & UART_LSR_SPECIAL))
+                receive_chars(mtpt, &status);
+        check_modem_status(mtpt);
+        if (status & UART_LSR_THRE)
+        {
+                if ((mtpt->port.type == PORT_16C105X)
+                        || (mtpt->port.type == PORT_16C105XA))
+                        transmit_chars(mtpt);
+                else
+                {
+                        if (mtpt->interface >= RS485NE)
+                                uart_set_mctrl(&mtpt->port, TIOCM_RTS);
+                        
+                        transmit_chars(mtpt);
+
+
+                        if (mtpt->interface >= RS485NE)
+                        {
+                                while((status=serial_in(mtpt,UART_LSR) &0x60)!=0x60);
+                                uart_clear_mctrl(&mtpt->port, TIOCM_RTS);
+                        }
+                }
+        }
+}
+
+
+
+static irqreturn_t multi_interrupt(int irq, void *dev_id)
+{
+        struct irq_info *iinfo = dev_id;
+        struct list_head *lhead, *end = NULL;
+        int pass_counter = 0;
+
+
+        spin_lock(&iinfo->lock);
+
+        lhead = iinfo->head;
+        do {
+                struct mp_port *mtpt;
+                unsigned int iir;
+
+                mtpt = list_entry(lhead, struct mp_port, list);
+                
+                iir = serial_in(mtpt, UART_IIR);
+                printk("intrrupt! port %d, iir 0x%x\n", mtpt->port.line, iir); //wlee
+                if (!(iir & UART_IIR_NO_INT)) 
+                {
+                        printk("interrupt handle\n");
+                        spin_lock(&mtpt->port.lock);
+                        multi_handle_port(mtpt);
+                        spin_unlock(&mtpt->port.lock);
+
+                        end = NULL;
+                } else if (end == NULL)
+                        end = lhead;
+
+                lhead = lhead->next;
+                if (lhead == iinfo->head && pass_counter++ > PASS_LIMIT) 
+                {
+                        printk(KERN_ERR "multi: too much work for "
+                                        "irq%d\n", irq);
+                        printk( "multi: too much work for "
+                                        "irq%d\n", irq);
+                        break;
+                }
+        } while (lhead != end);
+
+        spin_unlock(&iinfo->lock);
+
+
+        return IRQ_HANDLED;
+}
+
+static void serial_do_unlink(struct irq_info *i, struct mp_port *mtpt)
+{
+        spin_lock_irq(&i->lock);
+
+        if (!list_empty(i->head)) {
+                if (i->head == &mtpt->list)
+                        i->head = i->head->next;
+                list_del(&mtpt->list);
+        } else {
+                i->head = NULL;
+        }
+
+        spin_unlock_irq(&i->lock);
+}
+
+static int serial_link_irq_chain(struct mp_port *mtpt)
+{
+        struct irq_info *i = irq_lists + mtpt->port.irq;
+        int ret, irq_flags = mtpt->port.flags & UPF_SHARE_IRQ ? IRQF_SHARED : 0;
+        spin_lock_irq(&i->lock);
+
+        if (i->head) {
+                list_add(&mtpt->list, i->head);
+                spin_unlock_irq(&i->lock);
+
+                ret = 0;
+        } else {
+                INIT_LIST_HEAD(&mtpt->list);
+                i->head = &mtpt->list;
+                spin_unlock_irq(&i->lock);
+
+                ret = request_irq(mtpt->port.irq, multi_interrupt,
+                                irq_flags, "serial", i);
+                if (ret < 0)
+                        serial_do_unlink(i, mtpt);
+        }
+
+        return ret;
+}
+
+
+
+
+static void serial_unlink_irq_chain(struct mp_port *mtpt)
+{
+        struct irq_info *i = irq_lists + mtpt->port.irq;
+
+        if (list_empty(i->head))
+        {
+                free_irq(mtpt->port.irq, i);
+        }
+        serial_do_unlink(i, mtpt);
+}
+
+static void multi_timeout(unsigned long data)
+{
+        struct mp_port *mtpt = (struct mp_port *)data;
+
+
+        spin_lock(&mtpt->port.lock);
+        multi_handle_port(mtpt);
+        spin_unlock(&mtpt->port.lock);
+
+        mod_timer(&mtpt->timer, jiffies+1 );
+}
+
+static unsigned int multi_tx_empty(struct sb_uart_port *port)
+{
+        struct mp_port *mtpt = (struct mp_port *)port;
+        unsigned long flags;
+        unsigned int ret;
+
+        spin_lock_irqsave(&mtpt->port.lock, flags);
+        ret = serial_in(mtpt, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
+        spin_unlock_irqrestore(&mtpt->port.lock, flags);
+
+        return ret;
+}
+
+
+static unsigned int multi_get_mctrl(struct sb_uart_port *port)
+{
+        struct mp_port *mtpt = (struct mp_port *)port;
+        unsigned char status;
+        unsigned int ret;
+
+        status = serial_in(mtpt, UART_MSR);
+
+        ret = 0;
+        if (status & UART_MSR_DCD)
+                ret |= TIOCM_CAR;
+        if (status & UART_MSR_RI)
+                ret |= TIOCM_RNG;
+        if (status & UART_MSR_DSR)
+                ret |= TIOCM_DSR;
+        if (status & UART_MSR_CTS)
+                ret |= TIOCM_CTS;
+        return ret;
+}
+
+static void multi_set_mctrl(struct sb_uart_port *port, unsigned int mctrl)
+{
+        struct mp_port *mtpt = (struct mp_port *)port;
+        unsigned char mcr = 0;
+
+        mctrl &= 0xff;
+
+        if (mctrl & TIOCM_RTS)
+                mcr |= UART_MCR_RTS;
+        if (mctrl & TIOCM_DTR)
+                mcr |= UART_MCR_DTR;
+        if (mctrl & TIOCM_OUT1)
+                mcr |= UART_MCR_OUT1;
+        if (mctrl & TIOCM_OUT2)
+                mcr |= UART_MCR_OUT2;
+        if (mctrl & TIOCM_LOOP)
+                mcr |= UART_MCR_LOOP;
+
+
+        serial_out(mtpt, UART_MCR, mcr);
+}
+
+
+static void multi_break_ctl(struct sb_uart_port *port, int break_state)
+{
+        struct mp_port *mtpt = (struct mp_port *)port;
+        unsigned long flags;
+
+        spin_lock_irqsave(&mtpt->port.lock, flags);
+        if (break_state == -1)
+                mtpt->lcr |= UART_LCR_SBC;
+        else
+                mtpt->lcr &= ~UART_LCR_SBC;
+        serial_out(mtpt, UART_LCR, mtpt->lcr);
+        spin_unlock_irqrestore(&mtpt->port.lock, flags);
+}
+
+
+
+static int multi_startup(struct sb_uart_port *port)
+{
+        struct mp_port *mtpt = (struct mp_port *)port;
+        unsigned long flags;
+        int retval;
+
+        mtpt->capabilities = uart_config[mtpt->port.type].flags;
+        mtpt->mcr = 0;
+
+        if (mtpt->capabilities & UART_CLEAR_FIFO) {
+                serial_outp(mtpt, UART_FCR, UART_FCR_ENABLE_FIFO);
+                serial_outp(mtpt, UART_FCR, UART_FCR_ENABLE_FIFO |
+                                UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
+                serial_outp(mtpt, UART_FCR, 0);
+        }
+
+        (void) serial_inp(mtpt, UART_LSR);
+        (void) serial_inp(mtpt, UART_RX);
+        (void) serial_inp(mtpt, UART_IIR);
+        (void) serial_inp(mtpt, UART_MSR);
+        //test-wlee 9-bit disable
+        serial_outp(mtpt, UART_MSR, 0);
+
+
+        if (!(mtpt->port.flags & UPF_BUGGY_UART) &&
+                        (serial_inp(mtpt, UART_LSR) == 0xff)) {
+                printk("ttyS%d: LSR safety check engaged!\n", mtpt->port.line);
+                //return -ENODEV;
+        }
+
+        if ((!is_real_interrupt(mtpt->port.irq)) || (mtpt->poll_type==TYPE_POLL)) {
+                unsigned int timeout = mtpt->port.timeout;
+
+                timeout = timeout > 6 ? (timeout / 2 - 2) : 1;
+
+                mtpt->timer.data = (unsigned long)mtpt;
+                mod_timer(&mtpt->timer, jiffies + timeout);
+        } 
+        else 
+        {
+                retval = serial_link_irq_chain(mtpt);
+                if (retval)
+                        return retval;
+        }
+
+        serial_outp(mtpt, UART_LCR, UART_LCR_WLEN8);
+
+        spin_lock_irqsave(&mtpt->port.lock, flags);
+        if ((is_real_interrupt(mtpt->port.irq))||(mtpt->poll_type==TYPE_INTERRUPT))
+                mtpt->port.mctrl |= TIOCM_OUT2;
+
+        multi_set_mctrl(&mtpt->port, mtpt->port.mctrl);
+        spin_unlock_irqrestore(&mtpt->port.lock, flags);
+
+        
+        mtpt->ier = UART_IER_RLSI | UART_IER_RDI;
+        serial_outp(mtpt, UART_IER, mtpt->ier);
+
+        (void) serial_inp(mtpt, UART_LSR);
+        (void) serial_inp(mtpt, UART_RX);
+        (void) serial_inp(mtpt, UART_IIR);
+        (void) serial_inp(mtpt, UART_MSR);
+
+        return 0;
+}
+
+
+
+static void multi_shutdown(struct sb_uart_port *port)
+{
+        struct mp_port *mtpt = (struct mp_port *)port;
+        unsigned long flags;
+
+
+        mtpt->ier = 0;
+        serial_outp(mtpt, UART_IER, 0);
+
+        spin_lock_irqsave(&mtpt->port.lock, flags);
+        mtpt->port.mctrl &= ~TIOCM_OUT2;
+
+        multi_set_mctrl(&mtpt->port, mtpt->port.mctrl);
+        spin_unlock_irqrestore(&mtpt->port.lock, flags);
+
+        serial_out(mtpt, UART_LCR, serial_inp(mtpt, UART_LCR) & ~UART_LCR_SBC);
+        serial_outp(mtpt, UART_FCR, UART_FCR_ENABLE_FIFO |
+                        UART_FCR_CLEAR_RCVR |
+                        UART_FCR_CLEAR_XMIT);
+        serial_outp(mtpt, UART_FCR, 0);
+
+
+        (void) serial_in(mtpt, UART_RX);
+
+        if ((!is_real_interrupt(mtpt->port.irq))||(mtpt->poll_type==TYPE_POLL))
+        {
+                del_timer_sync(&mtpt->timer);
+        }
+        else
+        {
+                serial_unlink_irq_chain(mtpt);
+        }
+}
+
+
+
+static unsigned int multi_get_divisor(struct sb_uart_port *port, unsigned int baud)
+{
+        unsigned int quot;
+
+        if ((port->flags & UPF_MAGIC_MULTIPLIER) &&
+                        baud == (port->uartclk/4))
+                quot = 0x8001;
+        else if ((port->flags & UPF_MAGIC_MULTIPLIER) &&
+                        baud == (port->uartclk/8))
+                quot = 0x8002;
+        else
+                quot = sb_uart_get_divisor(port, baud);
+
+        return quot;
+}
+
+
+
+
+static void multi_set_termios(struct sb_uart_port *port, struct MP_TERMIOS *termios, struct MP_TERMIOS *old)
+{
+        struct mp_port *mtpt = (struct mp_port *)port;
+        unsigned char cval, fcr = 0;
+        unsigned long flags;
+        unsigned int baud, quot;
+
+        switch (termios->c_cflag & CSIZE) {
+                case CS5:
+                        cval = 0x00;
+                        break;
+                case CS6:
+                        cval = 0x01;
+                        break;
+                case CS7:
+                        cval = 0x02;
+                        break;
+                default:
+                case CS8:
+                        cval = 0x03;
+                        break;
+        }
+
+        if (termios->c_cflag & CSTOPB)
+                cval |= 0x04;
+        if (termios->c_cflag & PARENB)
+                cval |= UART_LCR_PARITY;
+        if (!(termios->c_cflag & PARODD))
+                cval |= UART_LCR_EPAR;
+
+#ifdef CMSPAR
+        if (termios->c_cflag & CMSPAR)
+                cval |= UART_LCR_SPAR;
+#endif
+
+        baud = sb_uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
+        quot = multi_get_divisor(port, baud);
+
+        if (mtpt->capabilities & UART_USE_FIFO) {
+                //if (baud < 2400)
+                //      fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
+                //else
+                //      fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
+
+                //      fcr = UART_FCR_ENABLE_FIFO | 0x90;
+                        fcr = fcr_arr[mtpt->port.line];
+        }
+
+        spin_lock_irqsave(&mtpt->port.lock, flags);
+
+        sb_uart_update_timeout(port, termios->c_cflag, baud);
+
+        mtpt->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
+        if (termios->c_iflag & INPCK)
+                mtpt->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
+        if (termios->c_iflag & (BRKINT | PARMRK))
+                mtpt->port.read_status_mask |= UART_LSR_BI;
+
+        mtpt->port.ignore_status_mask = 0;
+        if (termios->c_iflag & IGNPAR)
+                mtpt->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
+        if (termios->c_iflag & IGNBRK) {
+                mtpt->port.ignore_status_mask |= UART_LSR_BI;
+                if (termios->c_iflag & IGNPAR)
+                        mtpt->port.ignore_status_mask |= UART_LSR_OE;
+        }
+
+        if ((termios->c_cflag & CREAD) == 0)
+                mtpt->port.ignore_status_mask |= UART_LSR_DR;
+
+        mtpt->ier &= ~UART_IER_MSI;
+        if (UART_ENABLE_MS(&mtpt->port, termios->c_cflag))
+                mtpt->ier |= UART_IER_MSI;
+
+        serial_out(mtpt, UART_IER, mtpt->ier);
+
+        if (mtpt->capabilities & UART_STARTECH) {
+                serial_outp(mtpt, UART_LCR, 0xBF);
+                serial_outp(mtpt, UART_EFR,
+                                termios->c_cflag & CRTSCTS ? UART_EFR_CTS :0);
+        }
+
+        serial_outp(mtpt, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
+
+        serial_outp(mtpt, UART_DLL, quot & 0xff);     /* LS of divisor */
+        serial_outp(mtpt, UART_DLM, quot >> 8);       /* MS of divisor */
+
+        serial_outp(mtpt, UART_LCR, cval);        /* reset DLAB */
+        mtpt->lcr = cval;                 /* Save LCR */
+
+        if (fcr & UART_FCR_ENABLE_FIFO) {
+                /* emulated UARTs (Lucent Venus 167x) need two steps */
+                serial_outp(mtpt, UART_FCR, UART_FCR_ENABLE_FIFO);
+        }
+
+        serial_outp(mtpt, UART_FCR, fcr);     /* set fcr */
+
+
+        if ((mtpt->port.type == PORT_16C105X)
+                || (mtpt->port.type == PORT_16C105XA))
+        {
+                if(deep[mtpt->port.line]!=0)
+                        set_deep_fifo(port, ENABLE);
+
+                if (mtpt->interface != RS232)
+                        set_auto_rts(port,mtpt->interface);
+
+        }
+        else
+        {
+                if (mtpt->interface >= RS485NE)
+                {
+                        uart_clear_mctrl(&mtpt->port, TIOCM_RTS);
+                }
+        }
+
+        if(mtpt->device->device_id == PCI_DEVICE_ID_MP4M)
+        {
+                SendATCommand(mtpt);
+                printk("SendATCommand\n");
+        }       
+        multi_set_mctrl(&mtpt->port, mtpt->port.mctrl);
+        spin_unlock_irqrestore(&mtpt->port.lock, flags);
+}
+
+static void multi_pm(struct sb_uart_port *port, unsigned int state, unsigned int oldstate)
+{
+        struct mp_port *mtpt = (struct mp_port *)port;
+        if (state) {
+                if (mtpt->capabilities & UART_STARTECH) {
+                        serial_outp(mtpt, UART_LCR, 0xBF);
+                        serial_outp(mtpt, UART_EFR, UART_EFR_ECB);
+                        serial_outp(mtpt, UART_LCR, 0);
+                        serial_outp(mtpt, UART_IER, UART_IERX_SLEEP);
+                        serial_outp(mtpt, UART_LCR, 0xBF);
+                        serial_outp(mtpt, UART_EFR, 0);
+                        serial_outp(mtpt, UART_LCR, 0);
+                }
+
+                if (mtpt->pm)
+                        mtpt->pm(port, state, oldstate);
+        } 
+        else 
+        {
+                if (mtpt->capabilities & UART_STARTECH) {
+                        serial_outp(mtpt, UART_LCR, 0xBF);
+                        serial_outp(mtpt, UART_EFR, UART_EFR_ECB);
+                        serial_outp(mtpt, UART_LCR, 0);
+                        serial_outp(mtpt, UART_IER, 0);
+                        serial_outp(mtpt, UART_LCR, 0xBF);
+                        serial_outp(mtpt, UART_EFR, 0);
+                        serial_outp(mtpt, UART_LCR, 0);
+                }
+
+                if (mtpt->pm)
+                        mtpt->pm(port, state, oldstate);
+        }
+}
+
+static void multi_release_std_resource(struct mp_port *mtpt)
+{
+        unsigned int size = 8 << mtpt->port.regshift;
+
+        switch (mtpt->port.iotype) {
+                case UPIO_MEM:
+                        if (!mtpt->port.mapbase)
+                                break;
+
+                        if (mtpt->port.flags & UPF_IOREMAP) {
+                                iounmap(mtpt->port.membase);
+                                mtpt->port.membase = NULL;
+                        }
+
+                        release_mem_region(mtpt->port.mapbase, size);
+                        break;
+
+                case UPIO_HUB6:
+                case UPIO_PORT:
+                        release_region(mtpt->port.iobase,size);
+                        break;
+        }
+}
+
+static void multi_release_port(struct sb_uart_port *port)
+{
+}
+
+static int multi_request_port(struct sb_uart_port *port)
+{
+        return 0;
+}
+
+static void multi_config_port(struct sb_uart_port *port, int flags)
+{
+        struct mp_port *mtpt = (struct mp_port *)port;
+        int probeflags = PROBE_ANY;
+
+        if (flags & UART_CONFIG_TYPE)
+                autoconfig(mtpt, probeflags);
+        if (mtpt->port.type != PORT_UNKNOWN && flags & UART_CONFIG_IRQ)
+                autoconfig_irq(mtpt);
+
+        if (mtpt->port.type == PORT_UNKNOWN)
+                multi_release_std_resource(mtpt);
+}
+
+static int multi_verify_port(struct sb_uart_port *port, struct serial_struct *ser)
+{
+        if (ser->irq >= NR_IRQS || ser->irq < 0 ||
+                        ser->baud_base < 9600 || ser->type < PORT_UNKNOWN ||
+                        ser->type == PORT_STARTECH)
+                return -EINVAL;
+        return 0;
+}
+
+static const char * multi_type(struct sb_uart_port *port)
+{
+        int type = port->type;
+
+        if (type >= ARRAY_SIZE(uart_config))
+                type = 0;
+        return uart_config[type].name;
+}
+
+static struct sb_uart_ops multi_pops = {
+        .tx_empty   = multi_tx_empty,
+        .set_mctrl  = multi_set_mctrl,
+        .get_mctrl  = multi_get_mctrl,
+        .stop_tx    = multi_stop_tx,
+        .start_tx   = multi_start_tx,
+        .stop_rx    = multi_stop_rx,
+        .enable_ms  = multi_enable_ms,
+        .break_ctl  = multi_break_ctl,
+        .startup    = multi_startup,
+        .shutdown   = multi_shutdown,
+        .set_termios    = multi_set_termios,
+        .pm             = multi_pm,
+        .type           = multi_type,
+        .release_port   = multi_release_port,
+        .request_port   = multi_request_port,
+        .config_port    = multi_config_port,
+        .verify_port    = multi_verify_port,
+};
+
+static struct uart_driver multi_reg = {
+        .owner          = THIS_MODULE,
+        .driver_name    = "goldel_tulip",
+        .dev_name       = "ttyMP",
+        .major          = SB_TTY_MP_MAJOR,
+        .minor          = 0,
+        .nr             = MAX_MP_PORT, 
+        .cons           = NULL,
+};
+
+static void __init multi_init_ports(void)
+{
+        struct mp_port *mtpt;
+        static int first = 1;
+        int i,j,k;
+        unsigned char osc;
+        unsigned char b_ret = 0;
+        static struct mp_device_t * sbdev; 
+
+        if (!first)
+                return;
+        first = 0;
+
+        mtpt = multi_ports; 
+
+        for (k=0;k<NR_BOARD;k++)
+        {
+                sbdev = &mp_devs[k];
+
+                for (i = 0; i < sbdev->nr_ports; i++, mtpt++) 
+                {
+                        mtpt->device            = sbdev;
+                        mtpt->port.iobase   = sbdev->uart_access_addr + 8*i;
+                        mtpt->port.irq      = sbdev->irq;
+                        if ( ((sbdev->device_id == PCI_DEVICE_ID_MP4)&&(sbdev->revision==0x91)))
+                                mtpt->interface_config_addr = sbdev->option_reg_addr + 0x08 + i;
+                        else if (sbdev->revision == 0xc0)
+                                mtpt->interface_config_addr = sbdev->option_reg_addr + 0x08 + (i & 0x1);
+                        else
+                                mtpt->interface_config_addr = sbdev->option_reg_addr + 0x08 + i/8;
+
+                        mtpt->option_base_addr = sbdev->option_reg_addr;
+
+                        mtpt->poll_type = sbdev->poll_type;
+
+                        mtpt->port.uartclk  = BASE_BAUD * 16;
+
+                        /* get input clock infomation */
+                        osc = inb(sbdev->option_reg_addr + MP_OPTR_DIR0 + i/8) & 0x0F;
+                        if (osc==0x0f)
+                                osc = 0;
+                        for(j=0;j<osc;j++)
+                                mtpt->port.uartclk *= 2;
+                        mtpt->port.flags    |= STD_COM_FLAGS | UPF_SHARE_IRQ ;
+                        mtpt->port.iotype   = UPIO_PORT;
+                        mtpt->port.ops      = &multi_pops;
+
+                        if (sbdev->revision == 0xc0)
+                        {
+                                /* for SB16C1053APCI */
+                                b_ret = sb1053a_get_interface(mtpt, i);
+                        }
+                        else
+                        {
+                                b_ret = read_option_register(mtpt,(MP_OPTR_IIR0 + i/8));
+                                printk("IIR_RET = %x\n",b_ret);
+                        }
+
+                        if(IIR_RS232 == (b_ret & IIR_RS232))
+                        {
+                                mtpt->interface = RS232;
+                        }
+                        if(IIR_RS422 == (b_ret & IIR_RS422))
+                        {
+                                mtpt->interface = RS422PTP;
+                        }
+                        if(IIR_RS485 == (b_ret & IIR_RS485))
+                        {
+                                mtpt->interface = RS485NE;
+                        }
+                }
+        }
+}
+
+static void __init multi_register_ports(struct uart_driver *drv)
+{
+        int i;
+
+        multi_init_ports();
+
+        for (i = 0; i < NR_PORTS; i++) {
+                struct mp_port *mtpt = &multi_ports[i];
+
+                mtpt->port.line = i;
+                mtpt->port.ops = &multi_pops;
+                init_timer(&mtpt->timer);
+                mtpt->timer.function = multi_timeout;
+                mp_add_one_port(drv, &mtpt->port);
+        }
+}
+
+/**
+ * pci_remap_base - remap BAR value of pci device
+ *
+ * PARAMETERS
+ *  pcidev  - pci_dev structure address
+ *  offset  - BAR offset PCI_BASE_ADDRESS_0 ~ PCI_BASE_ADDRESS_4
+ *  address - address to be changed BAR value
+ *  size        - size of address space 
+ *
+ * RETURNS
+ *  If this function performs successful, it returns 0. Otherwise, It returns -1.
+ */
+static int pci_remap_base(struct pci_dev *pcidev, unsigned int offset, 
+                unsigned int address, unsigned int size) 
+{
+#if 0
+        struct resource *root;
+        unsigned index = (offset - 0x10) >> 2;
+#endif
+
+        pci_write_config_dword(pcidev, offset, address);
+#if 0
+        root = pcidev->resource[index].parent;
+        release_resource(&pcidev->resource[index]);
+        address &= ~0x1;
+        pcidev->resource[index].start = address;
+        pcidev->resource[index].end       = address + size - 1;
+
+        if (request_resource(root, &pcidev->resource[index]) != NULL)
+        {
+                printk(KERN_ERR "pci remap conflict!! 0x%x\n", address);
+                return (-1);
+        }
+#endif
+
+        return (0);
+}
+
+static int init_mp_dev(struct pci_dev *pcidev, mppcibrd_t brd)
+{
+        static struct mp_device_t * sbdev = mp_devs;
+        unsigned long addr = 0;
+        int j;
+        struct resource * ret = NULL;
+
+        sbdev->device_id = brd.device_id;
+        pci_read_config_byte(pcidev, PCI_CLASS_REVISION, &(sbdev->revision));
+        sbdev->name = brd.name;
+        sbdev->uart_access_addr = pcidev->resource[0].start & PCI_BASE_ADDRESS_IO_MASK;
+
+        /* check revision. The SB16C1053APCI's option i/o address is BAR4 */
+        if (sbdev->revision == 0xc0)
+        {
+                /* SB16C1053APCI */
+                sbdev->option_reg_addr = pcidev->resource[4].start & PCI_BASE_ADDRESS_IO_MASK;
+        }
+        else
+        {
+                sbdev->option_reg_addr = pcidev->resource[1].start & PCI_BASE_ADDRESS_IO_MASK;
+        }
+#if 1   
+        if (sbdev->revision == 0xc0)
+        {
+                outb(0x00, sbdev->option_reg_addr + MP_OPTR_GPOCR);
+                inb(sbdev->option_reg_addr + MP_OPTR_GPOCR);
+                outb(0x83, sbdev->option_reg_addr + MP_OPTR_GPOCR);
+        }
+#endif
+
+        sbdev->irq = pcidev->irq;
+
+        if ((brd.device_id & 0x0800) || !(brd.device_id &0xff00))
+        {
+                sbdev->poll_type = TYPE_INTERRUPT;
+        }
+        else
+        {
+                sbdev->poll_type = TYPE_POLL;
+        }
+
+        /* codes which is specific to each board*/
+        switch(brd.device_id){
+                case PCI_DEVICE_ID_MP1 :
+                case PCIE_DEVICE_ID_MP1 :
+                case PCIE_DEVICE_ID_MP1E :
+                case PCIE_DEVICE_ID_GT_MP1 :
+                        sbdev->nr_ports = 1;
+                        break;
+                case PCI_DEVICE_ID_MP2 :
+                case PCIE_DEVICE_ID_MP2 :
+                case PCIE_DEVICE_ID_GT_MP2 :
+                case PCIE_DEVICE_ID_MP2B :
+                case PCIE_DEVICE_ID_MP2E :
+                        sbdev->nr_ports = 2;
+
+                        /* serial base address remap */
+                        if (sbdev->revision == 0xc0)
+                        {
+                                int prev_port_addr = 0;
+
+                                pci_read_config_dword(pcidev, PCI_BASE_ADDRESS_0, &prev_port_addr);
+                                pci_remap_base(pcidev, PCI_BASE_ADDRESS_1, prev_port_addr + 8, 8);
+                        }
+                        break;
+                case PCI_DEVICE_ID_MP4 :
+                case PCI_DEVICE_ID_MP4A :
+                case PCIE_DEVICE_ID_MP4 :
+                case PCI_DEVICE_ID_GT_MP4 :
+                case PCI_DEVICE_ID_GT_MP4A :
+                case PCIE_DEVICE_ID_GT_MP4 :
+                case PCI_DEVICE_ID_MP4M :
+                case PCIE_DEVICE_ID_MP4B :
+                        sbdev->nr_ports = 4;
+
+                        if(sbdev->revision == 0x91){
+                                sbdev->reserved_addr[0] = pcidev->resource[0].start & PCI_BASE_ADDRESS_IO_MASK;
+                                outb(0x03 , sbdev->reserved_addr[0] + 0x01);
+                                outb(0x03 , sbdev->reserved_addr[0] + 0x02);
+                                outb(0x01 , sbdev->reserved_addr[0] + 0x20);
+                                outb(0x00 , sbdev->reserved_addr[0] + 0x21);
+                                request_region(sbdev->reserved_addr[0], 32, sbdev->name);
+                                sbdev->uart_access_addr = pcidev->resource[1].start & PCI_BASE_ADDRESS_IO_MASK;
+                                sbdev->option_reg_addr = pcidev->resource[2].start & PCI_BASE_ADDRESS_IO_MASK;
+                        }
+
+                        /* SB16C1053APCI */
+                        if (sbdev->revision == 0xc0)
+                        {
+                                int prev_port_addr = 0;
+
+                                pci_read_config_dword(pcidev, PCI_BASE_ADDRESS_0, &prev_port_addr);
+                                pci_remap_base(pcidev, PCI_BASE_ADDRESS_1, prev_port_addr + 8, 8);
+                                pci_remap_base(pcidev, PCI_BASE_ADDRESS_2, prev_port_addr + 16, 8);
+                                pci_remap_base(pcidev, PCI_BASE_ADDRESS_3, prev_port_addr + 24, 8);
+                        }
+                        break;
+                case PCI_DEVICE_ID_MP6 :
+                case PCI_DEVICE_ID_MP6A :
+                case PCI_DEVICE_ID_GT_MP6 :
+                case PCI_DEVICE_ID_GT_MP6A :
+                        sbdev->nr_ports = 6;
+
+                        /* SB16C1053APCI */
+                        if (sbdev->revision == 0xc0)
+                        {
+                                int prev_port_addr = 0;
+
+                                pci_read_config_dword(pcidev, PCI_BASE_ADDRESS_0, &prev_port_addr);
+                                pci_remap_base(pcidev, PCI_BASE_ADDRESS_1, prev_port_addr + 8, 8);
+                                pci_remap_base(pcidev, PCI_BASE_ADDRESS_2, prev_port_addr + 16, 16);
+                                pci_remap_base(pcidev, PCI_BASE_ADDRESS_3, prev_port_addr + 32, 16);
+                        }
+                        break;
+                case PCI_DEVICE_ID_MP8 :
+                case PCIE_DEVICE_ID_MP8 :
+                case PCI_DEVICE_ID_GT_MP8 :
+                case PCIE_DEVICE_ID_GT_MP8 :
+                case PCIE_DEVICE_ID_MP8B :
+                        sbdev->nr_ports = 8;
+                        break;
+                case PCI_DEVICE_ID_MP32 :
+                case PCIE_DEVICE_ID_MP32 :
+                case PCI_DEVICE_ID_GT_MP32 :
+                case PCIE_DEVICE_ID_GT_MP32 :
+                        {
+                                int portnum_hex=0;
+                                portnum_hex = inb(sbdev->option_reg_addr);
+                                sbdev->nr_ports = ((portnum_hex/16)*10) + (portnum_hex % 16);
+                        }
+                        break;
+                case PCI_DEVICE_ID_MP2S1P :
+                        sbdev->nr_ports = 2;
+
+                        /* SB16C1053APCI */
+                        if (sbdev->revision == 0xc0)
+                        {
+                                int prev_port_addr = 0;
+
+                                pci_read_config_dword(pcidev, PCI_BASE_ADDRESS_0, &prev_port_addr);
+                                pci_remap_base(pcidev, PCI_BASE_ADDRESS_1, prev_port_addr + 8, 8);
+                        }
+
+                        /* add PC compatible parallel port */
+                        parport_pc_probe_port(pcidev->resource[2].start, pcidev->resource[3].start, PARPORT_IRQ_NONE, PARPORT_DMA_NONE, &pcidev->dev, 0);
+                        break;
+                case PCI_DEVICE_ID_MP1P :
+                        /* add PC compatible parallel port */
+                        parport_pc_probe_port(pcidev->resource[2].start, pcidev->resource[3].start, PARPORT_IRQ_NONE, PARPORT_DMA_NONE, &pcidev->dev, 0);
+                        break;
+        }
+
+        ret = request_region(sbdev->uart_access_addr, (8*sbdev->nr_ports), sbdev->name);
+
+        if (sbdev->revision == 0xc0)
+        {
+                ret = request_region(sbdev->option_reg_addr, 0x40, sbdev->name);
+        }
+        else
+        {
+                ret = request_region(sbdev->option_reg_addr, 0x20, sbdev->name);
+        }
+
+
+        NR_BOARD++;
+        NR_PORTS += sbdev->nr_ports;
+
+        /* Enable PCI interrupt */
+        addr = sbdev->option_reg_addr + MP_OPTR_IMR0;
+        for(j=0; j < (sbdev->nr_ports/8)+1; j++)
+        {
+                if (sbdev->poll_type == TYPE_INTERRUPT)
+                {
+                        outb(0xff,addr +j);
+                }
+        }
+        sbdev++;
+
+        return 0;
+}
+
+static int __init multi_init(void)
+{
+        int ret, i;
+        struct pci_dev  *dev = NULL;
+
+        if(fcr_count==0)
+        {
+                for(i=0;i<256;i++)
+                {
+                        fcr_arr[i] = 0x01;
+                        
+                }
+        }
+        if(deep_count==0)
+        {
+                for(i=0;i<256;i++)
+                {
+                        deep[i] = 1;
+                        
+                }
+        }
+        if(rtr_count==0)
+        {
+                for(i=0;i<256;i++)
+                {
+                        rtr[i] = 0x10;
+                }
+        }
+        if(ttr_count==0)
+        {
+                for(i=0;i<256;i++)
+                {
+                        ttr[i] = 0x38;
+                }
+        }
+
+
+printk("MULTI INIT\n");
+        for( i=0; i< mp_nrpcibrds; i++)
+        {
+
+                while( (dev = pci_get_device(mp_pciboards[i].vendor_id, mp_pciboards[i].device_id, dev) ) )
+
+                {
+printk("FOUND~~~\n");
+//      Cent OS bug fix
+//                      if (mp_pciboards[i].device_id & 0x0800)
+                        {
+                                int status;
+                                pci_disable_device(dev);
+                                status = pci_enable_device(dev);
+            
+                                if (status != 0)
+                                { 
+                                        printk("Multiport Board Enable Fail !\n\n");
+                                        status = -ENXIO;
+                                        return status;
+                                }
+                        }
+
+                        init_mp_dev(dev, mp_pciboards[i]);      
+                }
+        }
+
+        for (i = 0; i < NR_IRQS; i++)
+                spin_lock_init(&irq_lists[i].lock);
+
+        ret = mp_register_driver(&multi_reg);
+
+        if (ret >= 0)
+                multi_register_ports(&multi_reg);
+
+        return ret;
+}
+
+static void __exit multi_exit(void)
+{
+        int i;
+
+        for (i = 0; i < NR_PORTS; i++)
+                mp_remove_one_port(&multi_reg, &multi_ports[i].port);
+
+        mp_unregister_driver(&multi_reg);
+}
+
+module_init(multi_init);
+module_exit(multi_exit);
+
+MODULE_DESCRIPTION("SystemBase Multiport PCI/PCIe CORE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/staging/sb105x/sb_pci_mp.h b/drivers/staging/sb105x/sb_pci_mp.h
new file mode 100644
index 000000000000..f33efde07b97
--- /dev/null
+++ b/drivers/staging/sb105x/sb_pci_mp.h
@@ -0,0 +1,293 @@
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/serial_reg.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/wait.h>
+#include <linux/tty_driver.h>
+#include <linux/pci.h>
+#include <linux/circ_buf.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/segment.h>
+#include <asm/serial.h>
+#include <linux/interrupt.h>
+
+
+#include <linux/parport.h>
+#include <linux/ctype.h>
+#include <linux/poll.h>
+
+
+#define MP_TERMIOS  ktermios
+
+#include "sb_mp_register.h"
+#include "sb_ser_core.h"
+
+#define DRIVER_VERSION  "1.1"
+#define DRIVER_DATE     "2012/01/05"
+#define DRIVER_AUTHOR  "SYSTEMBASE<tech@sysbas.com>"
+#define DRIVER_DESC  "SystemBase PCI/PCIe Multiport Core"
+
+#define SB_TTY_MP_MAJOR                 54
+#define PCI_VENDOR_ID_MULTIPORT         0x14A1
+
+#define PCI_DEVICE_ID_MP1               0x4d01
+#define PCI_DEVICE_ID_MP2               0x4d02
+#define PCI_DEVICE_ID_MP4               0x4d04
+#define PCI_DEVICE_ID_MP4A              0x4d54
+#define PCI_DEVICE_ID_MP6               0x4d06
+#define PCI_DEVICE_ID_MP6A              0x4d56
+#define PCI_DEVICE_ID_MP8               0x4d08
+#define PCI_DEVICE_ID_MP32              0x4d32
+/* Parallel port */
+#define PCI_DEVICE_ID_MP1P              0x4301
+#define PCI_DEVICE_ID_MP2S1P            0x4303
+
+#define PCIE_DEVICE_ID_MP1              0x4501
+#define PCIE_DEVICE_ID_MP2              0x4502
+#define PCIE_DEVICE_ID_MP4              0x4504
+#define PCIE_DEVICE_ID_MP8              0x4508
+#define PCIE_DEVICE_ID_MP32             0x4532
+
+#define PCIE_DEVICE_ID_MP1E             0x4e01
+#define PCIE_DEVICE_ID_MP2E             0x4e02
+#define PCIE_DEVICE_ID_MP2B             0x4b02
+#define PCIE_DEVICE_ID_MP4B             0x4b04
+#define PCIE_DEVICE_ID_MP8B             0x4b08
+
+#define PCI_DEVICE_ID_GT_MP4            0x0004
+#define PCI_DEVICE_ID_GT_MP4A           0x0054
+#define PCI_DEVICE_ID_GT_MP6            0x0006
+#define PCI_DEVICE_ID_GT_MP6A           0x0056
+#define PCI_DEVICE_ID_GT_MP8            0x0008
+#define PCI_DEVICE_ID_GT_MP32           0x0032
+
+#define PCIE_DEVICE_ID_GT_MP1           0x1501
+#define PCIE_DEVICE_ID_GT_MP2           0x1502
+#define PCIE_DEVICE_ID_GT_MP4           0x1504
+#define PCIE_DEVICE_ID_GT_MP8           0x1508
+#define PCIE_DEVICE_ID_GT_MP32          0x1532
+
+#define PCI_DEVICE_ID_MP4M              0x4604  //modem
+
+#define MAX_MP_DEV  8
+#define BD_MAX_PORT 32  /* Max serial port in one board */
+#define MAX_MP_PORT 256 /* Max serial port in one PC */
+
+#define PORT_16C105XA   3
+#define PORT_16C105X    2
+#define PORT_16C55X             1
+
+#define ENABLE          1
+#define DISABLE         0
+
+/* ioctls */
+#define TIOCGNUMOFPORT          0x545F
+#define TIOCSMULTIECHO          0x5440
+#define TIOCSPTPNOECHO          0x5441
+
+#define TIOCGOPTIONREG          0x5461
+#define TIOCGDISABLEIRQ         0x5462
+#define TIOCGENABLEIRQ          0x5463
+#define TIOCGSOFTRESET          0x5464
+#define TIOCGSOFTRESETR         0x5465
+#define TIOCGREGINFO            0x5466
+#define TIOCGGETLSR             0x5467
+#define TIOCGGETDEVID           0x5468
+#define TIOCGGETBDNO            0x5469
+#define TIOCGGETINTERFACE       0x546A
+#define TIOCGGETREV             0x546B
+#define TIOCGGETNRPORTS         0x546C
+#define TIOCGGETPORTTYPE        0x546D
+#define GETDEEPFIFO             0x54AA
+#define SETDEEPFIFO             0x54AB
+#define SETFCR                  0x54BA
+#define SETTTR                  0x54B1
+#define SETRTR                  0x54B2
+#define GETTTR                  0x54B3
+#define GETRTR                  0x54B4
+
+/* multi-drop mode related ioctl commands */
+#define TIOCSMULTIDROP          0x5470
+#define TIOCSMDADDR             0x5471
+#define TIOCGMDADDR             0x5472
+#define TIOCSENDADDR            0x5473
+
+
+/* serial interface */
+#define RS232           1 
+#define RS422PTP        2
+#define RS422MD         3
+#define RS485NE         4
+#define RS485ECHO       5
+
+#define serial_inp(up, offset)      serial_in(up, offset)
+#define serial_outp(up, offset, value)  serial_out(up, offset, value)
+        
+#define PASS_LIMIT  256
+#define is_real_interrupt(irq)  ((irq) != 0)
+
+#define PROBE_ANY   (~0)
+
+static DEFINE_MUTEX(mp_mutex);
+#define MP_MUTEX_LOCK(x) mutex_lock(&(x)) 
+#define MP_MUTEX_UNLOCK(x) mutex_unlock(&(x)) 
+#define MP_STATE_LOCK(x) mutex_lock(&((x)->mutex)) 
+#define MP_STATE_UNLOCK(x) mutex_unlock(&((x)->mutex)) 
+        
+
+#define UART_LSR_SPECIAL    0x1E
+        
+#define HIGH_BITS_OFFSET        ((sizeof(long)-sizeof(int))*8)
+#define uart_users(state)       ((state)->count + ((state)->info ? (state)->info->blocked_open : 0))
+
+
+//#define MP_DEBUG 1
+#undef MP_DEBUG
+
+#ifdef MP_DEBUG
+#define DPRINTK(x...)   printk(x)
+#else
+#define DPRINTK(x...)   do { } while (0)
+#endif
+
+#ifdef MP_DEBUG
+#define DEBUG_AUTOCONF(fmt...)  printk(fmt)
+#else
+#define DEBUG_AUTOCONF(fmt...)  do { } while (0)
+#endif
+
+#ifdef MP_DEBUG
+#define DEBUG_INTR(fmt...)  printk(fmt)
+#else
+#define DEBUG_INTR(fmt...)  do { } while (0)
+#endif
+
+#if defined(__i386__) && (defined(CONFIG_M386) || defined(CONFIG_M486))
+#define SERIAL_INLINE
+#endif
+#ifdef SERIAL_INLINE
+#define _INLINE_ inline
+#else
+#define _INLINE_
+#endif
+
+#define TYPE_POLL       1
+#define TYPE_INTERRUPT  2
+
+
+struct mp_device_t {
+        unsigned short  device_id;
+        unsigned char   revision;
+        char            *name;
+        unsigned long   uart_access_addr;
+        unsigned long   option_reg_addr;
+        unsigned long   reserved_addr[4];
+        int             irq;
+        int             nr_ports;
+        int             poll_type;
+};
+
+typedef struct mppcibrd {
+        char            *name;
+        unsigned short  vendor_id;
+        unsigned short  device_id;
+} mppcibrd_t;
+
+static mppcibrd_t mp_pciboards[] = {
+
+        { "Multi-1 PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_MP1} ,
+        { "Multi-2 PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_MP2} ,
+        { "Multi-4 PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_MP4} ,
+        { "Multi-4 PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_MP4A} ,
+        { "Multi-6 PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_MP6} ,
+        { "Multi-6 PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_MP6A} ,
+        { "Multi-8 PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_MP8} ,
+        { "Multi-32 PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_MP32} ,
+
+        { "Multi-1P PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_MP1P} ,
+        { "Multi-2S1P PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_MP2S1P} ,
+
+        { "Multi-4(GT) PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_GT_MP4} ,
+        { "Multi-4(GT) PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_GT_MP4A} ,
+        { "Multi-6(GT) PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_GT_MP6} ,
+        { "Multi-6(GT) PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_GT_MP6A} ,
+        { "Multi-8(GT) PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_GT_MP8} ,
+        { "Multi-32(GT) PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_GT_MP32} ,
+
+        { "Multi-1 PCIe", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_MP1} ,
+        { "Multi-2 PCIe", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_MP2} ,
+        { "Multi-4 PCIe", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_MP4} ,
+        { "Multi-8 PCIe", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_MP8} ,
+        { "Multi-32 PCIe", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_MP32} ,
+
+        { "Multi-1 PCIe E", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_MP1E} ,
+        { "Multi-2 PCIe E", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_MP2E} ,
+        { "Multi-2 PCIe B", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_MP2B} ,
+        { "Multi-4 PCIe B", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_MP4B} ,
+        { "Multi-8 PCIe B", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_MP8B} ,
+
+        { "Multi-1(GT) PCIe", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_GT_MP1} ,
+        { "Multi-2(GT) PCIe", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_GT_MP2} ,
+        { "Multi-4(GT) PCIe", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_GT_MP4} ,
+        { "Multi-8(GT) PCIe", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_GT_MP8} ,
+        { "Multi-32(GT) PCIe", PCI_VENDOR_ID_MULTIPORT , PCIE_DEVICE_ID_GT_MP32} ,
+
+        { "Multi-4M PCI", PCI_VENDOR_ID_MULTIPORT , PCI_DEVICE_ID_MP4M} ,
+};
+
+struct mp_port {
+        struct sb_uart_port port;
+
+        struct timer_list   timer;      /* "no irq" timer */
+        struct list_head    list;       /* ports on this IRQ */
+        unsigned int        capabilities;   /* port capabilities */
+        unsigned short      rev;
+        unsigned char       acr;
+        unsigned char       ier;
+        unsigned char       lcr;
+        unsigned char       mcr;
+        unsigned char       mcr_mask;   /* mask of user bits */
+        unsigned char       mcr_force;  /* mask of forced bits */
+        unsigned char       lsr_break_flag;
+
+        void            (*pm)(struct sb_uart_port *port,
+                        unsigned int state, unsigned int old);
+        struct mp_device_t *device;
+        unsigned long   interface_config_addr;
+        unsigned long   option_base_addr;
+        unsigned char   interface;
+        unsigned char   poll_type;
+};
+
+struct irq_info {
+        spinlock_t      lock;
+        struct list_head    *head;
+};
+
+struct sb105x_uart_config {
+        char    *name;
+        int     dfl_xmit_fifo_size;
+        int     flags;
+};
+
+static const struct sb105x_uart_config uart_config[] = {
+        { "unknown",    1,  0 },
+        { "16550A", 16, UART_CLEAR_FIFO | UART_USE_FIFO },
+        { "SB16C1050",    128,    UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH },
+        { "SB16C1050A",    128,    UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH },
+};
+
+
+
diff --git a/drivers/staging/sb105x/sb_ser_core.h b/drivers/staging/sb105x/sb_ser_core.h
new file mode 100644
index 000000000000..c8fb99173299
--- /dev/null
+++ b/drivers/staging/sb105x/sb_ser_core.h
@@ -0,0 +1,368 @@
+#include <linux/wait.h>
+
+#define UART_CONFIG_TYPE        (1 << 0)
+#define UART_CONFIG_IRQ         (1 << 1)
+#define UPIO_PORT               (0)
+#define UPIO_HUB6               (1)
+#define UPIO_MEM                (2)
+#define UPIO_MEM32              (3)
+#define UPIO_AU                 (4)                     /* Au1x00 type IO */
+#define UPIO_TSI                (5)                     /* Tsi108/109 type IO */
+#define UPF_FOURPORT            (1 << 1)
+#define UPF_SAK                 (1 << 2)
+#define UPF_SPD_MASK            (0x1030)
+#define UPF_SPD_HI              (0x0010)
+#define UPF_SPD_VHI             (0x0020)
+#define UPF_SPD_CUST            (0x0030)
+#define UPF_SPD_SHI             (0x1000)
+#define UPF_SPD_WARP            (0x1010)
+#define UPF_SKIP_TEST           (1 << 6)
+#define UPF_AUTO_IRQ            (1 << 7)
+#define UPF_HARDPPS_CD          (1 << 11)
+#define UPF_LOW_LATENCY         (1 << 13)
+#define UPF_BUGGY_UART          (1 << 14)
+#define UPF_MAGIC_MULTIPLIER    (1 << 16)
+#define UPF_CONS_FLOW           (1 << 23)
+#define UPF_SHARE_IRQ           (1 << 24)
+#define UPF_BOOT_AUTOCONF       (1 << 28)
+#define UPF_DEAD                (1 << 30)
+#define UPF_IOREMAP             (1 << 31)
+#define UPF_CHANGE_MASK         (0x17fff)
+#define UPF_USR_MASK            (UPF_SPD_MASK|UPF_LOW_LATENCY)
+#define USF_CLOSING_WAIT_INF    (0)
+#define USF_CLOSING_WAIT_NONE   (~0U)
+
+#define UART_XMIT_SIZE  PAGE_SIZE
+
+#define UIF_CHECK_CD            (1 << 25)
+#define UIF_CTS_FLOW            (1 << 26)
+#define UIF_NORMAL_ACTIVE       (1 << 29)
+#define UIF_INITIALIZED         (1 << 31)
+#define UIF_SUSPENDED           (1 << 30)
+
+#define WAKEUP_CHARS            256
+
+#define uart_circ_empty(circ)           ((circ)->head == (circ)->tail)
+#define uart_circ_clear(circ)           ((circ)->head = (circ)->tail = 0)
+
+#define uart_circ_chars_pending(circ)   \
+        (CIRC_CNT((circ)->head, (circ)->tail, UART_XMIT_SIZE))
+
+#define uart_circ_chars_free(circ)      \
+        (CIRC_SPACE((circ)->head, (circ)->tail, UART_XMIT_SIZE))
+
+#define uart_tx_stopped(port)           \
+        ((port)->info->tty->stopped || (port)->info->tty->hw_stopped)
+
+#define UART_ENABLE_MS(port,cflag)      ((port)->flags & UPF_HARDPPS_CD || \
+                                         (cflag) & CRTSCTS || \
+                                         !((cflag) & CLOCAL))
+
+
+struct sb_uart_port;
+struct sb_uart_info;
+struct serial_struct;
+struct device;
+
+struct sb_uart_ops {
+        unsigned int    (*tx_empty)(struct sb_uart_port *);
+        void            (*set_mctrl)(struct sb_uart_port *, unsigned int mctrl);
+        unsigned int    (*get_mctrl)(struct sb_uart_port *);
+        void            (*stop_tx)(struct sb_uart_port *);
+        void            (*start_tx)(struct sb_uart_port *);
+        void            (*send_xchar)(struct sb_uart_port *, char ch);
+        void            (*stop_rx)(struct sb_uart_port *);
+        void            (*enable_ms)(struct sb_uart_port *);
+        void            (*break_ctl)(struct sb_uart_port *, int ctl);
+        int             (*startup)(struct sb_uart_port *);
+        void            (*shutdown)(struct sb_uart_port *);
+        void            (*set_termios)(struct sb_uart_port *, struct MP_TERMIOS *new,
+                                       struct MP_TERMIOS *old);
+        void            (*pm)(struct sb_uart_port *, unsigned int state,
+                              unsigned int oldstate);
+        int             (*set_wake)(struct sb_uart_port *, unsigned int state);
+
+        const char *(*type)(struct sb_uart_port *);
+
+        void            (*release_port)(struct sb_uart_port *);
+
+        int             (*request_port)(struct sb_uart_port *);
+        void            (*config_port)(struct sb_uart_port *, int);
+        int             (*verify_port)(struct sb_uart_port *, struct serial_struct *);
+        int             (*ioctl)(struct sb_uart_port *, unsigned int, unsigned long);
+};
+
+
+struct sb_uart_icount {
+        __u32   cts;
+        __u32   dsr;
+        __u32   rng;
+        __u32   dcd;
+        __u32   rx;
+        __u32   tx;
+        __u32   frame;
+        __u32   overrun;
+        __u32   parity;
+        __u32   brk;
+        __u32   buf_overrun;
+};
+typedef unsigned int  upf_t;
+
+struct sb_uart_port {
+        spinlock_t              lock;                   /* port lock */
+        unsigned int            iobase;                 /* in/out[bwl] */
+        unsigned char __iomem   *membase;               /* read/write[bwl] */
+        unsigned int            irq;                    /* irq number */
+        unsigned int            uartclk;                /* base uart clock */
+        unsigned int            fifosize;               /* tx fifo size */
+        unsigned char           x_char;                 /* xon/xoff char */
+        unsigned char           regshift;               /* reg offset shift */
+        unsigned char           iotype;                 /* io access style */
+        unsigned char           unused1;
+
+
+        unsigned int            read_status_mask;       /* driver specific */
+        unsigned int            ignore_status_mask;     /* driver specific */
+        struct sb_uart_info     *info;                  /* pointer to parent info */
+        struct sb_uart_icount   icount;                 /* statistics */
+
+        struct console          *cons;                  /* struct console, if any */
+#ifdef CONFIG_SERIAL_CORE_CONSOLE
+        unsigned long           sysrq;                  /* sysrq timeout */
+#endif
+
+        upf_t                   flags;
+
+        unsigned int            mctrl;                  /* current modem ctrl settings */
+        unsigned int            timeout;                /* character-based timeout */
+        unsigned int            type;                   /* port type */
+        const struct sb_uart_ops        *ops;
+        unsigned int            custom_divisor;
+        unsigned int            line;                   /* port index */
+        unsigned long           mapbase;                /* for ioremap */
+        struct device           *dev;                   /* parent device */
+        unsigned char           hub6;                   /* this should be in the 8250 driver */
+        unsigned char           unused[3];
+};
+
+#define mdmode                  unused[2]
+#define MDMODE_ADDR             0x1
+#define MDMODE_ENABLE   0x2
+#define MDMODE_AUTO             0x4
+#define MDMODE_ADDRSEND 0x8
+
+struct sb_uart_state {
+        unsigned int            close_delay;            /* msec */
+        unsigned int            closing_wait;           /* msec */
+
+
+        int                     count;
+        int                     pm_state;
+        struct sb_uart_info     *info;
+        struct sb_uart_port     *port;
+
+        struct mutex            mutex;
+};
+
+typedef unsigned int  uif_t;
+
+struct sb_uart_info {
+        struct tty_struct       *tty;
+        struct circ_buf         xmit;
+        uif_t                   flags;
+
+        int                     blocked_open;
+
+        struct tasklet_struct   tlet;
+
+        wait_queue_head_t       open_wait;
+        wait_queue_head_t       delta_msr_wait;
+};
+
+
+struct module;
+struct tty_driver;
+
+struct uart_driver {
+        struct module           *owner;
+        const char              *driver_name;
+        const char              *dev_name;
+        int                      major;
+        int                      minor;
+        int                      nr;
+        struct console          *cons;
+
+        struct sb_uart_state    *state;
+        struct tty_driver               *tty_driver;
+};
+
+void sb_uart_write_wakeup(struct sb_uart_port *port)
+{
+    struct sb_uart_info *info = port->info;
+    tasklet_schedule(&info->tlet);
+}
+
+void sb_uart_update_timeout(struct sb_uart_port *port, unsigned int cflag,
+                         unsigned int baud)
+{
+    unsigned int bits;
+
+    switch (cflag & CSIZE)
+    {
+        case CS5:
+            bits = 7;
+            break;
+
+        case CS6:
+            bits = 8;
+            break;
+
+        case CS7:
+            bits = 9;
+            break;
+
+        default:
+            bits = 10;
+            break;
+    }
+
+    if (cflag & CSTOPB)
+    {
+        bits++;
+    }
+
+    if (cflag & PARENB)
+    {
+        bits++;
+    }
+
+    bits = bits * port->fifosize;
+
+    port->timeout = (HZ * bits) / baud + HZ/50;
+}
+unsigned int sb_uart_get_baud_rate(struct sb_uart_port *port, struct MP_TERMIOS *termios,
+                                struct MP_TERMIOS *old, unsigned int min,
+                                unsigned int max)
+{
+        unsigned int try, baud, altbaud = 38400;
+        upf_t flags = port->flags & UPF_SPD_MASK;
+
+        if (flags == UPF_SPD_HI)
+                altbaud = 57600;
+        if (flags == UPF_SPD_VHI)
+                altbaud = 115200;
+        if (flags == UPF_SPD_SHI)
+                altbaud = 230400;
+        if (flags == UPF_SPD_WARP)
+                altbaud = 460800;
+
+        for (try = 0; try < 2; try++) {
+
+                switch (termios->c_cflag & (CBAUD | CBAUDEX))
+                {
+                        case B921600    : baud = 921600;    break;
+                        case B460800    : baud = 460800;    break;
+                        case B230400    : baud = 230400;    break;
+                        case B115200    : baud = 115200;    break;
+                        case B57600     : baud = 57600;     break;
+                        case B38400     : baud = 38400;     break;
+                        case B19200     : baud = 19200;     break;
+                        case B9600      : baud = 9600;      break;
+                        case B4800      : baud = 4800;      break;
+                        case B2400      : baud = 2400;      break;
+                        case B1800      : baud = 1800;      break;
+                        case B1200      : baud = 1200;      break;
+                        case B600       : baud = 600;       break;
+                        case B300       : baud = 300;       break;
+                        case B200       : baud = 200;       break;
+                        case B150       : baud = 150;       break;
+                        case B134       : baud = 134;       break;
+                        case B110       : baud = 110;       break;
+                        case B75        : baud = 75;        break;
+                        case B50        : baud = 50;        break;
+                        default         : baud = 9600;      break;
+                }
+
+                if (baud == 38400)
+                        baud = altbaud;
+
+                if (baud == 0)
+                        baud = 9600;
+
+                if (baud >= min && baud <= max)
+                        return baud;
+
+                termios->c_cflag &= ~CBAUD;
+                if (old) {
+                        termios->c_cflag |= old->c_cflag & CBAUD;
+                        old = NULL;
+                        continue;
+                }
+
+                termios->c_cflag |= B9600;
+        }
+
+        return 0;
+}
+unsigned int sb_uart_get_divisor(struct sb_uart_port *port, unsigned int baud)
+{
+        unsigned int quot;
+
+        if (baud == 38400 && (port->flags & UPF_SPD_MASK) == UPF_SPD_CUST)
+                quot = port->custom_divisor;
+        else
+                quot = (port->uartclk + (8 * baud)) / (16 * baud);
+
+        return quot;
+}
+
+
+
+static inline int sb_uart_handle_break(struct sb_uart_port *port)
+{
+        struct sb_uart_info *info = port->info;
+
+        if (port->flags & UPF_SAK)
+                do_SAK(info->tty);
+        return 0;
+}
+
+static inline void sb_uart_handle_dcd_change(struct sb_uart_port *port, unsigned int status)
+{
+        struct sb_uart_info *info = port->info;
+
+        port->icount.dcd++;
+
+        if (info->flags & UIF_CHECK_CD) {
+                if (status)
+                        wake_up_interruptible(&info->open_wait);
+                else if (info->tty)
+                        tty_hangup(info->tty);
+        }
+}
+
+static inline void sb_uart_handle_cts_change(struct sb_uart_port *port, unsigned int status)
+{
+        struct sb_uart_info *info = port->info;
+        struct tty_struct *tty = info->tty;
+
+        port->icount.cts++;
+
+        if (info->flags & UIF_CTS_FLOW) {
+                if (tty->hw_stopped) {
+                        if (status) {
+                                tty->hw_stopped = 0;
+                                port->ops->start_tx(port);
+                                sb_uart_write_wakeup(port);
+                        }
+                } else {
+                        if (!status) {
+                                tty->hw_stopped = 1;
+                                port->ops->stop_tx(port);
+                        }
+                }
+        }
+}
+
+
+
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index 42d0a2581a87..9d7d00cdfecb 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -1771,6 +1771,7 @@ fail_free_irq:
 fail_unregister:
         tty_unregister_driver(serial_driver);
 fail_put_tty_driver:
+        tty_port_destroy(&state->tport);
         put_tty_driver(serial_driver);
         return error;
 }
@@ -1785,6 +1786,7 @@ static int __exit amiga_serial_remove(struct platform_device *pdev)
                 printk("SERIAL: failed to unregister serial driver (%d)\n",
                        error);
         put_tty_driver(serial_driver);
+        tty_port_destroy(&state->tport);
 
         free_irq(IRQ_AMIGA_TBE, state);
         free_irq(IRQ_AMIGA_RBF, state);
diff --git a/drivers/tty/bfin_jtag_comm.c b/drivers/tty/bfin_jtag_comm.c
index 02b7d3a09696..1cfcdbf1d0cc 100644
--- a/drivers/tty/bfin_jtag_comm.c
+++ b/drivers/tty/bfin_jtag_comm.c
@@ -240,8 +240,6 @@ static int __init bfin_jc_init(void)
 {
         int ret;
 
-        tty_port_init(&port);
-
         bfin_jc_kthread = kthread_create(bfin_jc_emudat_manager, NULL, DRV_NAME);
         if (IS_ERR(bfin_jc_kthread))
                 return PTR_ERR(bfin_jc_kthread);
@@ -257,6 +255,8 @@ static int __init bfin_jc_init(void)
         if (!bfin_jc_driver)
                 goto err_driver;
 
+        tty_port_init(&port);
+
         bfin_jc_driver->driver_name  = DRV_NAME;
         bfin_jc_driver->name         = DEV_NAME;
         bfin_jc_driver->type         = TTY_DRIVER_TYPE_SERIAL;
@@ -274,6 +274,7 @@ static int __init bfin_jc_init(void)
         return 0;
 
  err:
+        tty_port_destroy(&port);
         put_tty_driver(bfin_jc_driver);
  err_driver:
         kfree(bfin_jc_write_buf.buf);
@@ -289,6 +290,7 @@ static void __exit bfin_jc_exit(void)
         kfree(bfin_jc_write_buf.buf);
         tty_unregister_driver(bfin_jc_driver);
         put_tty_driver(bfin_jc_driver);
+        tty_port_destroy(&port);
 }
 module_exit(bfin_jc_exit);
 
diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c
index 0a6a0bc1b598..b09c8d1f9a66 100644
--- a/drivers/tty/cyclades.c
+++ b/drivers/tty/cyclades.c
@@ -3099,7 +3099,7 @@ static const struct tty_port_operations cyz_port_ops = {
  * ---------------------------------------------------------------------
  */
 
-static int __devinit cy_init_card(struct cyclades_card *cinfo)
+static int cy_init_card(struct cyclades_card *cinfo)
 {
         struct cyclades_port *info;
         unsigned int channel, port;
@@ -3196,7 +3196,7 @@ static int __devinit cy_init_card(struct cyclades_card *cinfo)
 
 /* initialize chips on Cyclom-Y card -- return number of valid
    chips (which is number of ports/4) */
-static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
+static unsigned short cyy_init_card(void __iomem *true_base_addr,
                 int index)
 {
         unsigned int chip_number;
@@ -3405,7 +3405,7 @@ static int __init cy_detect_isa(void)
 }                               /* cy_detect_isa */
 
 #ifdef CONFIG_PCI
-static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
+static inline int cyc_isfwstr(const char *str, unsigned int size)
 {
         unsigned int a;
 
@@ -3420,7 +3420,7 @@ static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
         return 0;
 }
 
-static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
+static inline void cyz_fpga_copy(void __iomem *fpga, const u8 *data,
                 unsigned int size)
 {
         for (; size > 0; size--) {
@@ -3429,7 +3429,7 @@ static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
         }
 }
 
-static void __devinit plx_init(struct pci_dev *pdev, int irq,
+static void plx_init(struct pci_dev *pdev, int irq,
                 struct RUNTIME_9060 __iomem *addr)
 {
         /* Reset PLX */
@@ -3449,7 +3449,7 @@ static void __devinit plx_init(struct pci_dev *pdev, int irq,
         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
 }
 
-static int __devinit __cyz_load_fw(const struct firmware *fw,
+static int __cyz_load_fw(const struct firmware *fw,
                 const char *name, const u32 mailbox, void __iomem *base,
                 void __iomem *fpga)
 {
@@ -3526,7 +3526,7 @@ static int __devinit __cyz_load_fw(const struct firmware *fw,
         return 0;
 }
 
-static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
+static int cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
                 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
 {
         const struct firmware *fw;
@@ -3692,7 +3692,7 @@ err:
         return retval;
 }
 
-static int __devinit cy_pci_probe(struct pci_dev *pdev,
+static int cy_pci_probe(struct pci_dev *pdev,
                 const struct pci_device_id *ent)
 {
         struct cyclades_card *card;
@@ -3931,10 +3931,10 @@ err:
         return retval;
 }
 
-static void __devexit cy_pci_remove(struct pci_dev *pdev)
+static void cy_pci_remove(struct pci_dev *pdev)
 {
         struct cyclades_card *cinfo = pci_get_drvdata(pdev);
-        unsigned int i;
+        unsigned int i, channel;
 
         /* non-Z with old PLX */
         if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
@@ -3960,9 +3960,11 @@ static void __devexit cy_pci_remove(struct pci_dev *pdev)
         pci_release_regions(pdev);
 
         cinfo->base_addr = NULL;
-        for (i = cinfo->first_line; i < cinfo->first_line +
-                        cinfo->nports; i++)
+        for (channel = 0, i = cinfo->first_line; i < cinfo->first_line +
+                        cinfo->nports; i++, channel++) {
                 tty_unregister_device(cy_serial_driver, i);
+                tty_port_destroy(&cinfo->ports[channel].port);
+        }
         cinfo->nports = 0;
         kfree(cinfo->ports);
 }
@@ -3971,7 +3973,7 @@ static struct pci_driver cy_pci_driver = {
         .name = "cyclades",
         .id_table = cy_pci_dev_id,
         .probe = cy_pci_probe,
-        .remove = __devexit_p(cy_pci_remove)
+        .remove = cy_pci_remove
 };
 #endif
 
diff --git a/drivers/tty/ehv_bytechan.c b/drivers/tty/ehv_bytechan.c
index 4ab936b7aac6..c117d775a22f 100644
--- a/drivers/tty/ehv_bytechan.c
+++ b/drivers/tty/ehv_bytechan.c
@@ -699,7 +699,7 @@ static const struct tty_port_operations ehv_bc_tty_port_ops = {
         .shutdown = ehv_bc_tty_port_shutdown,
 };
 
-static int __devinit ehv_bc_tty_probe(struct platform_device *pdev)
+static int ehv_bc_tty_probe(struct platform_device *pdev)
 {
         struct device_node *np = pdev->dev.of_node;
         struct ehv_bc_data *bc;
@@ -757,6 +757,7 @@ static int __devinit ehv_bc_tty_probe(struct platform_device *pdev)
         return 0;
 
 error:
+        tty_port_destroy(&bc->port);
         irq_dispose_mapping(bc->tx_irq);
         irq_dispose_mapping(bc->rx_irq);
 
@@ -770,6 +771,7 @@ static int ehv_bc_tty_remove(struct platform_device *pdev)
 
         tty_unregister_device(ehv_bc_driver, bc - bcs);
 
+        tty_port_destroy(&bc->port);
         irq_dispose_mapping(bc->tx_irq);
         irq_dispose_mapping(bc->rx_irq);
 
diff --git a/drivers/tty/hvc/hvc_opal.c b/drivers/tty/hvc/hvc_opal.c
index 0d2ea0c224c3..be1a9a1e749e 100644
--- a/drivers/tty/hvc/hvc_opal.c
+++ b/drivers/tty/hvc/hvc_opal.c
@@ -41,7 +41,7 @@
 
 static const char hvc_opal_name[] = "hvc_opal";
 
-static struct of_device_id hvc_opal_match[] __devinitdata = {
+static struct of_device_id hvc_opal_match[] = {
         { .name = "serial", .compatible = "ibm,opal-console-raw" },
         { .name = "serial", .compatible = "ibm,opal-console-hvsi" },
         { },
@@ -161,7 +161,7 @@ static const struct hv_ops hvc_opal_hvsi_ops = {
         .tiocmset = hvc_opal_hvsi_tiocmset,
 };
 
-static int __devinit hvc_opal_probe(struct platform_device *dev)
+static int hvc_opal_probe(struct platform_device *dev)
 {
         const struct hv_ops *ops;
         struct hvc_struct *hp;
@@ -222,7 +222,7 @@ static int __devinit hvc_opal_probe(struct platform_device *dev)
         return 0;
 }
 
-static int __devexit hvc_opal_remove(struct platform_device *dev)
+static int hvc_opal_remove(struct platform_device *dev)
 {
         struct hvc_struct *hp = dev_get_drvdata(&dev->dev);
         int rc, termno;
@@ -239,7 +239,7 @@ static int __devexit hvc_opal_remove(struct platform_device *dev)
 
 static struct platform_driver hvc_opal_driver = {
         .probe          = hvc_opal_probe,
-        .remove         = __devexit_p(hvc_opal_remove),
+        .remove         = hvc_opal_remove,
         .driver         = {
                 .name   = hvc_opal_name,
                 .owner  = THIS_MODULE,
diff --git a/drivers/tty/hvc/hvc_vio.c b/drivers/tty/hvc/hvc_vio.c
index 070c0ee68642..ed6f5f1f5a55 100644
--- a/drivers/tty/hvc/hvc_vio.c
+++ b/drivers/tty/hvc/hvc_vio.c
@@ -53,7 +53,7 @@
 
 static const char hvc_driver_name[] = "hvc_console";
 
-static struct vio_device_id hvc_driver_table[] __devinitdata = {
+static struct vio_device_id hvc_driver_table[] = {
         {"serial", "hvterm1"},
 #ifndef HVC_OLD_HVSI
         {"serial", "hvterm-protocol"},
@@ -293,7 +293,7 @@ static int udbg_hvc_getc(void)
         }
 }
 
-static int __devinit hvc_vio_probe(struct vio_dev *vdev,
+static int hvc_vio_probe(struct vio_dev *vdev,
                                    const struct vio_device_id *id)
 {
         const struct hv_ops *ops;
@@ -362,7 +362,7 @@ static int __devinit hvc_vio_probe(struct vio_dev *vdev,
         return 0;
 }
 
-static int __devexit hvc_vio_remove(struct vio_dev *vdev)
+static int hvc_vio_remove(struct vio_dev *vdev)
 {
         struct hvc_struct *hp = dev_get_drvdata(&vdev->dev);
         int rc, termno;
diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c
index f4abfe238f98..19843ec3f80a 100644
--- a/drivers/tty/hvc/hvc_xen.c
+++ b/drivers/tty/hvc/hvc_xen.c
@@ -422,7 +422,7 @@ static int xencons_connect_backend(struct xenbus_device *dev,
         return ret;
 }
 
-static int __devinit xencons_probe(struct xenbus_device *dev,
+static int xencons_probe(struct xenbus_device *dev,
                                   const struct xenbus_device_id *id)
 {
         int ret, devid;
diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c
index cab5c7adf8e8..877635733952 100644
--- a/drivers/tty/hvc/hvcs.c
+++ b/drivers/tty/hvc/hvcs.c
@@ -330,12 +330,12 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp);
 static void hvcs_close(struct tty_struct *tty, struct file *filp);
 static void hvcs_hangup(struct tty_struct * tty);
 
-static int __devinit hvcs_probe(struct vio_dev *dev,
+static int hvcs_probe(struct vio_dev *dev,
                 const struct vio_device_id *id);
-static int __devexit hvcs_remove(struct vio_dev *dev);
+static int hvcs_remove(struct vio_dev *dev);
 static int __init hvcs_module_init(void);
 static void __exit hvcs_module_exit(void);
-static int __devinit hvcs_initialize(void);
+static int hvcs_initialize(void);
 
 #define HVCS_SCHED_READ 0x00000001
 #define HVCS_QUICK_READ 0x00000002
@@ -676,7 +676,7 @@ static int khvcsd(void *unused)
         return 0;
 }
 
-static struct vio_device_id hvcs_driver_table[] __devinitdata= {
+static struct vio_device_id hvcs_driver_table[] = {
         {"serial-server", "hvterm2"},
         { "", "" }
 };
@@ -756,7 +756,7 @@ static int hvcs_get_index(void)
         return -1;
 }
 
-static int __devinit hvcs_probe(
+static int hvcs_probe(
         struct vio_dev *dev,
         const struct vio_device_id *id)
 {
@@ -835,7 +835,7 @@ static int __devinit hvcs_probe(
         return 0;
 }
 
-static int __devexit hvcs_remove(struct vio_dev *dev)
+static int hvcs_remove(struct vio_dev *dev)
 {
         struct hvcs_struct *hvcsd = dev_get_drvdata(&dev->dev);
         unsigned long flags;
@@ -874,7 +874,7 @@ static int __devexit hvcs_remove(struct vio_dev *dev)
 static struct vio_driver hvcs_vio_driver = {
         .id_table       = hvcs_driver_table,
         .probe          = hvcs_probe,
-        .remove         = __devexit_p(hvcs_remove),
+        .remove         = hvcs_remove,
         .name           = hvcs_driver_name,
 };
 
@@ -1478,7 +1478,7 @@ static void hvcs_free_index_list(void)
         hvcs_index_count = 0;
 }
 
-static int __devinit hvcs_initialize(void)
+static int hvcs_initialize(void)
 {
         int rc, num_ttys_to_alloc;
 
@@ -1496,8 +1496,10 @@ static int __devinit hvcs_initialize(void)
                 num_ttys_to_alloc = hvcs_parm_num_devs;
 
         hvcs_tty_driver = alloc_tty_driver(num_ttys_to_alloc);
-        if (!hvcs_tty_driver)
+        if (!hvcs_tty_driver) {
+                mutex_unlock(&hvcs_init_mutex);
                 return -ENOMEM;
+        }
 
         if (hvcs_alloc_index_list(num_ttys_to_alloc)) {
                 rc = -ENOMEM;
diff --git a/drivers/tty/hvc/hvsi.c b/drivers/tty/hvc/hvsi.c
index 5b95b4f28cf3..68357a6e4de9 100644
--- a/drivers/tty/hvc/hvsi.c
+++ b/drivers/tty/hvc/hvsi.c
@@ -1218,6 +1218,7 @@ static int __init hvsi_console_init(void)
                 if (hp->virq == 0) {
                         printk(KERN_ERR "%s: couldn't create irq mapping for 0x%x\n",
                                 __func__, irq[0]);
+                        tty_port_destroy(&hp->port);
                         continue;
                 }
 
diff --git a/drivers/tty/ipwireless/network.c b/drivers/tty/ipwireless/network.c
index 57102e66165a..c0dfb642383b 100644
--- a/drivers/tty/ipwireless/network.c
+++ b/drivers/tty/ipwireless/network.c
@@ -352,6 +352,8 @@ static struct sk_buff *ipw_packet_received_skb(unsigned char *data,
         }
 
         skb = dev_alloc_skb(length + 4);
+        if (skb == NULL)
+                return NULL;
         skb_reserve(skb, 2);
         memcpy(skb_put(skb, length), data, length);
 
@@ -397,7 +399,8 @@ void ipwireless_network_packet_received(struct ipw_network *network,
 
                                 /* Send the data to the ppp_generic module. */
                                 skb = ipw_packet_received_skb(data, length);
-                                ppp_input(network->ppp_channel, skb);
+                                if (skb)
+                                        ppp_input(network->ppp_channel, skb);
                         } else
                                 spin_unlock_irqrestore(&network->lock,
                                                 flags);
diff --git a/drivers/tty/ipwireless/tty.c b/drivers/tty/ipwireless/tty.c
index 160f0ad9589d..2cde13ddf9fc 100644
--- a/drivers/tty/ipwireless/tty.c
+++ b/drivers/tty/ipwireless/tty.c
@@ -566,6 +566,7 @@ void ipwireless_tty_free(struct ipw_tty *tty)
                         ipwireless_disassociate_network_ttys(network,
                                                              ttyj->channel_idx);
                         tty_unregister_device(ipw_tty_driver, j);
+                        tty_port_destroy(&ttyj->port);
                         ttys[j] = NULL;
                         mutex_unlock(&ttyj->ipw_tty_mutex);
                         kfree(ttyj);
diff --git a/drivers/tty/isicom.c b/drivers/tty/isicom.c
index d7492e183607..3205b2e9090b 100644
--- a/drivers/tty/isicom.c
+++ b/drivers/tty/isicom.c
@@ -148,7 +148,7 @@
 #endif
 
 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
-static void __devexit isicom_remove(struct pci_dev *);
+static void isicom_remove(struct pci_dev *);
 
 static struct pci_device_id isicom_pci_tbl[] = {
         { PCI_DEVICE(VENDOR_ID, 0x2028) },
@@ -168,7 +168,7 @@ static struct pci_driver isicom_driver = {
         .name           = "isicom",
         .id_table       = isicom_pci_tbl,
         .probe          = isicom_probe,
-        .remove         = __devexit_p(isicom_remove)
+        .remove         = isicom_remove
 };
 
 static int prev_card = 3;       /*      start servicing isi_card[0]     */
@@ -603,7 +603,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
                         if (tty_port_cts_enabled(&port->port)) {
                                 if (tty->hw_stopped) {
                                         if (header & ISI_CTS) {
-                                                port->port.tty->hw_stopped = 0;
+                                                tty->hw_stopped = 0;
                                                 /* start tx ing */
                                                 port->status |= (ISI_TXOK
                                                         | ISI_CTS);
@@ -1307,7 +1307,7 @@ static const struct tty_port_operations isicom_port_ops = {
         .shutdown               = isicom_shutdown,
 };
 
-static int __devinit reset_card(struct pci_dev *pdev,
+static int reset_card(struct pci_dev *pdev,
         const unsigned int card, unsigned int *signature)
 {
         struct isi_board *board = pci_get_drvdata(pdev);
@@ -1368,7 +1368,7 @@ end:
         return retval;
 }
 
-static int __devinit load_firmware(struct pci_dev *pdev,
+static int load_firmware(struct pci_dev *pdev,
         const unsigned int index, const unsigned int signature)
 {
         struct isi_board *board = pci_get_drvdata(pdev);
@@ -1548,7 +1548,7 @@ end:
  */
 static unsigned int card_count;
 
-static int __devinit isicom_probe(struct pci_dev *pdev,
+static int isicom_probe(struct pci_dev *pdev,
         const struct pci_device_id *ent)
 {
         unsigned int uninitialized_var(signature), index;
@@ -1610,10 +1610,15 @@ static int __devinit isicom_probe(struct pci_dev *pdev,
         if (retval < 0)
                 goto errunri;
 
-        for (index = 0; index < board->port_count; index++)
-                tty_port_register_device(&board->ports[index].port,
-                                isicom_normal, board->index * 16 + index,
-                                &pdev->dev);
+        for (index = 0; index < board->port_count; index++) {
+                struct tty_port *tport = &board->ports[index].port;
+                tty_port_init(tport);
+                tport->ops = &isicom_port_ops;
+                tport->close_delay = 50 * HZ/100;
+                tport->closing_wait = 3000 * HZ/100;
+                tty_port_register_device(tport, isicom_normal,
+                                board->index * 16 + index, &pdev->dev);
+        }
 
         return 0;
 
@@ -1630,13 +1635,15 @@ err:
         return retval;
 }
 
-static void __devexit isicom_remove(struct pci_dev *pdev)
+static void isicom_remove(struct pci_dev *pdev)
 {
         struct isi_board *board = pci_get_drvdata(pdev);
         unsigned int i;
 
-        for (i = 0; i < board->port_count; i++)
+        for (i = 0; i < board->port_count; i++) {
                 tty_unregister_device(isicom_normal, board->index * 16 + i);
+                tty_port_destroy(&board->ports[i].port);
+        }
 
         free_irq(board->irq, board);
         pci_release_region(pdev, 3);
@@ -1655,13 +1662,9 @@ static int __init isicom_init(void)
                 isi_card[idx].ports = port;
                 spin_lock_init(&isi_card[idx].card_lock);
                 for (channel = 0; channel < 16; channel++, port++) {
-                        tty_port_init(&port->port);
-                        port->port.ops = &isicom_port_ops;
                         port->magic = ISICOM_MAGIC;
                         port->card = &isi_card[idx];
                         port->channel = channel;
-                        port->port.close_delay = 50 * HZ/100;
-                        port->port.closing_wait = 3000 * HZ/100;
                         port->status = 0;
                         /*  . . .  */
                 }
diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c
index 56e616b9109a..f9d28503bdec 100644
--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -895,6 +895,8 @@ static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
 
         return 0;
 err_free:
+        for (i = 0; i < MAX_PORTS_PER_BOARD; i++)
+                tty_port_destroy(&brd->ports[i].port);
         kfree(brd->ports);
 err:
         return ret;
@@ -919,6 +921,8 @@ static void moxa_board_deinit(struct moxa_board_conf *brd)
                                 tty_kref_put(tty);
                         }
                 }
+        for (a = 0; a < MAX_PORTS_PER_BOARD; a++)
+                tty_port_destroy(&brd->ports[a].port);
         while (1) {
                 opened = 0;
                 for (a = 0; a < brd->numPorts; a++)
@@ -941,7 +945,7 @@ static void moxa_board_deinit(struct moxa_board_conf *brd)
 }
 
 #ifdef CONFIG_PCI
-static int __devinit moxa_pci_probe(struct pci_dev *pdev,
+static int moxa_pci_probe(struct pci_dev *pdev,
                 const struct pci_device_id *ent)
 {
         struct moxa_board_conf *board;
@@ -1016,7 +1020,7 @@ err:
         return retval;
 }
 
-static void __devexit moxa_pci_remove(struct pci_dev *pdev)
+static void moxa_pci_remove(struct pci_dev *pdev)
 {
         struct moxa_board_conf *brd = pci_get_drvdata(pdev);
 
@@ -1029,7 +1033,7 @@ static struct pci_driver moxa_pci_driver = {
         .name = "moxa",
         .id_table = moxa_pcibrds,
         .probe = moxa_pci_probe,
-        .remove = __devexit_p(moxa_pci_remove)
+        .remove = moxa_pci_remove
 };
 #endif /* CONFIG_PCI */
 
@@ -1370,7 +1374,7 @@ static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
                 p->DCDState = dcd;
                 spin_unlock_irqrestore(&p->port.lock, flags);
                 tty = tty_port_tty_get(&p->port);
-                if (tty && C_CLOCAL(tty) && !dcd)
+                if (tty && !C_CLOCAL(tty) && !dcd)
                         tty_hangup(tty);
                 tty_kref_put(tty);
         }
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index cfda47dabd28..40113868bec2 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -487,7 +487,7 @@ static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
 }
 
 #ifdef CONFIG_PCI
-static int __devinit CheckIsMoxaMust(unsigned long io)
+static int CheckIsMoxaMust(unsigned long io)
 {
         u8 oldmcr, hwid;
         int i;
@@ -2369,7 +2369,7 @@ static void mxser_release_ISA_res(struct mxser_board *brd)
         mxser_release_vector(brd);
 }
 
-static int __devinit mxser_initbrd(struct mxser_board *brd,
+static int mxser_initbrd(struct mxser_board *brd,
                 struct pci_dev *pdev)
 {
         struct mxser_port *info;
@@ -2411,14 +2411,27 @@ static int __devinit mxser_initbrd(struct mxser_board *brd,
 
         retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
                         brd);
-        if (retval)
+        if (retval) {
+                for (i = 0; i < brd->info->nports; i++)
+                        tty_port_destroy(&brd->ports[i].port);
                 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
                         "conflict with another device.\n",
                         brd->info->name, brd->irq);
+        }
 
         return retval;
 }
 
+static void mxser_board_remove(struct mxser_board *brd)
+{
+        unsigned int i;
+
+        for (i = 0; i < brd->info->nports; i++) {
+                tty_unregister_device(mxvar_sdriver, brd->idx + i);
+                tty_port_destroy(&brd->ports[i].port);
+        }
+}
+
 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
 {
         int id, i, bits, ret;
@@ -2534,7 +2547,7 @@ err_irqconflict:
         return -EIO;
 }
 
-static int __devinit mxser_probe(struct pci_dev *pdev,
+static int mxser_probe(struct pci_dev *pdev,
                 const struct pci_device_id *ent)
 {
 #ifdef CONFIG_PCI
@@ -2645,14 +2658,12 @@ err:
 #endif
 }
 
-static void __devexit mxser_remove(struct pci_dev *pdev)
+static void mxser_remove(struct pci_dev *pdev)
 {
 #ifdef CONFIG_PCI
         struct mxser_board *brd = pci_get_drvdata(pdev);
-        unsigned int i;
 
-        for (i = 0; i < brd->info->nports; i++)
-                tty_unregister_device(mxvar_sdriver, brd->idx + i);
+        mxser_board_remove(brd);
 
         free_irq(pdev->irq, brd);
         pci_release_region(pdev, 2);
@@ -2666,7 +2677,7 @@ static struct pci_driver mxser_driver = {
         .name = "mxser",
         .id_table = mxser_pcibrds,
         .probe = mxser_probe,
-        .remove = __devexit_p(mxser_remove)
+        .remove = mxser_remove
 };
 
 static int __init mxser_module_init(void)
@@ -2748,15 +2759,13 @@ err_put:
 
 static void __exit mxser_module_exit(void)
 {
-        unsigned int i, j;
+        unsigned int i;
 
         pci_unregister_driver(&mxser_driver);
 
         for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
                 if (mxser_boards[i].info != NULL)
-                        for (j = 0; j < mxser_boards[i].info->nports; j++)
-                                tty_unregister_device(mxvar_sdriver,
-                                                mxser_boards[i].idx + j);
+                        mxser_board_remove(&mxser_boards[i]);
         tty_unregister_driver(mxvar_sdriver);
         put_tty_driver(mxvar_sdriver);
 
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 1e8e8ce55959..dcc0430a49c8 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -134,7 +134,6 @@ struct gsm_dlci {
 #define DLCI_OPENING            1       /* Sending SABM not seen UA */
 #define DLCI_OPEN               2       /* SABM/UA complete */
 #define DLCI_CLOSING            3       /* Sending DISC not seen UA/DM */
-        struct kref ref;                /* freed from port or mux close */
         struct mutex mutex;
 
         /* Link layer */
@@ -1635,7 +1634,6 @@ static struct gsm_dlci *gsm_dlci_alloc(struct gsm_mux *gsm, int addr)
         if (dlci == NULL)
                 return NULL;
         spin_lock_init(&dlci->lock);
-        kref_init(&dlci->ref);
         mutex_init(&dlci->mutex);
         dlci->fifo = &dlci->_fifo;
         if (kfifo_alloc(&dlci->_fifo, 4096, GFP_KERNEL) < 0) {
@@ -1669,9 +1667,9 @@ static struct gsm_dlci *gsm_dlci_alloc(struct gsm_mux *gsm, int addr)
  *
  *      Can sleep.
  */
-static void gsm_dlci_free(struct kref *ref)
+static void gsm_dlci_free(struct tty_port *port)
 {
-        struct gsm_dlci *dlci = container_of(ref, struct gsm_dlci, ref);
+        struct gsm_dlci *dlci = container_of(port, struct gsm_dlci, port);
 
         del_timer_sync(&dlci->t1);
         dlci->gsm->dlci[dlci->addr] = NULL;
@@ -1683,12 +1681,12 @@ static void gsm_dlci_free(struct kref *ref)
 
 static inline void dlci_get(struct gsm_dlci *dlci)
 {
-        kref_get(&dlci->ref);
+        tty_port_get(&dlci->port);
 }
 
 static inline void dlci_put(struct gsm_dlci *dlci)
 {
-        kref_put(&dlci->ref, gsm_dlci_free);
+        tty_port_put(&dlci->port);
 }
 
 /**
@@ -2874,6 +2872,7 @@ static void gsm_dtr_rts(struct tty_port *port, int onoff)
 static const struct tty_port_operations gsm_port_ops = {
         .carrier_raised = gsm_carrier_raised,
         .dtr_rts = gsm_dtr_rts,
+        .destruct = gsm_dlci_free,
 };
 
 static int gsmtty_install(struct tty_driver *driver, struct tty_struct *tty)
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 8c0b7b42319c..19083efa2314 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -73,10 +73,42 @@
 #define ECHO_OP_SET_CANON_COL 0x81
 #define ECHO_OP_ERASE_TAB 0x82
 
+struct n_tty_data {
+        unsigned int column;
+        unsigned long overrun_time;
+        int num_overrun;
+
+        unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
+        unsigned char echo_overrun:1;
+
+        DECLARE_BITMAP(process_char_map, 256);
+        DECLARE_BITMAP(read_flags, N_TTY_BUF_SIZE);
+
+        char *read_buf;
+        int read_head;
+        int read_tail;
+        int read_cnt;
+
+        unsigned char *echo_buf;
+        unsigned int echo_pos;
+        unsigned int echo_cnt;
+
+        int canon_data;
+        unsigned long canon_head;
+        unsigned int canon_column;
+
+        struct mutex atomic_read_lock;
+        struct mutex output_lock;
+        struct mutex echo_lock;
+        spinlock_t read_lock;
+};
+
 static inline int tty_put_user(struct tty_struct *tty, unsigned char x,
                                unsigned char __user *ptr)
 {
-        tty_audit_add_data(tty, &x, 1);
+        struct n_tty_data *ldata = tty->disc_data;
+
+        tty_audit_add_data(tty, &x, 1, ldata->icanon);
         return put_user(x, ptr);
 }
 
@@ -92,17 +124,18 @@ static inline int tty_put_user(struct tty_struct *tty, unsigned char x,
 
 static void n_tty_set_room(struct tty_struct *tty)
 {
+        struct n_tty_data *ldata = tty->disc_data;
         int left;
         int old_left;
 
-        /* tty->read_cnt is not read locked ? */
+        /* ldata->read_cnt is not read locked ? */
         if (I_PARMRK(tty)) {
                 /* Multiply read_cnt by 3, since each byte might take up to
                  * three times as many spaces when PARMRK is set (depending on
                  * its flags, e.g. parity error). */
-                left = N_TTY_BUF_SIZE - tty->read_cnt * 3 - 1;
+                left = N_TTY_BUF_SIZE - ldata->read_cnt * 3 - 1;
         } else
-                left = N_TTY_BUF_SIZE - tty->read_cnt - 1;
+                left = N_TTY_BUF_SIZE - ldata->read_cnt - 1;
 
         /*
          * If we are doing input canonicalization, and there are no
@@ -111,44 +144,47 @@ static void n_tty_set_room(struct tty_struct *tty)
          * characters will be beeped.
          */
         if (left <= 0)
-                left = tty->icanon && !tty->canon_data;
+                left = ldata->icanon && !ldata->canon_data;
         old_left = tty->receive_room;
         tty->receive_room = left;
 
         /* Did this open up the receive buffer? We may need to flip */
-        if (left && !old_left)
-                schedule_work(&tty->buf.work);
+        if (left && !old_left) {
+                WARN_RATELIMIT(tty->port->itty == NULL,
+                                "scheduling with invalid itty\n");
+                schedule_work(&tty->port->buf.work);
+        }
 }
 
-static void put_tty_queue_nolock(unsigned char c, struct tty_struct *tty)
+static void put_tty_queue_nolock(unsigned char c, struct n_tty_data *ldata)
 {
-        if (tty->read_cnt < N_TTY_BUF_SIZE) {
-                tty->read_buf[tty->read_head] = c;
-                tty->read_head = (tty->read_head + 1) & (N_TTY_BUF_SIZE-1);
-                tty->read_cnt++;
+        if (ldata->read_cnt < N_TTY_BUF_SIZE) {
+                ldata->read_buf[ldata->read_head] = c;
+                ldata->read_head = (ldata->read_head + 1) & (N_TTY_BUF_SIZE-1);
+                ldata->read_cnt++;
         }
 }
 
 /**
  *      put_tty_queue           -       add character to tty
  *      @c: character
- *      @tty: tty device
+ *      @ldata: n_tty data
  *
  *      Add a character to the tty read_buf queue. This is done under the
  *      read_lock to serialize character addition and also to protect us
  *      against parallel reads or flushes
  */
 
-static void put_tty_queue(unsigned char c, struct tty_struct *tty)
+static void put_tty_queue(unsigned char c, struct n_tty_data *ldata)
 {
         unsigned long flags;
         /*
          *      The problem of stomping on the buffers ends here.
          *      Why didn't anyone see this one coming? --AJK
         */
-        spin_lock_irqsave(&tty->read_lock, flags);
-        put_tty_queue_nolock(c, tty);
-        spin_unlock_irqrestore(&tty->read_lock, flags);
+        spin_lock_irqsave(&ldata->read_lock, flags);
+        put_tty_queue_nolock(c, ldata);
+        spin_unlock_irqrestore(&ldata->read_lock, flags);
 }
 
 /**
@@ -179,18 +215,19 @@ static void check_unthrottle(struct tty_struct *tty)
 
 static void reset_buffer_flags(struct tty_struct *tty)
 {
+        struct n_tty_data *ldata = tty->disc_data;
         unsigned long flags;
 
-        spin_lock_irqsave(&tty->read_lock, flags);
-        tty->read_head = tty->read_tail = tty->read_cnt = 0;
-        spin_unlock_irqrestore(&tty->read_lock, flags);
+        spin_lock_irqsave(&ldata->read_lock, flags);
+        ldata->read_head = ldata->read_tail = ldata->read_cnt = 0;
+        spin_unlock_irqrestore(&ldata->read_lock, flags);
 
-        mutex_lock(&tty->echo_lock);
-        tty->echo_pos = tty->echo_cnt = tty->echo_overrun = 0;
-        mutex_unlock(&tty->echo_lock);
+        mutex_lock(&ldata->echo_lock);
+        ldata->echo_pos = ldata->echo_cnt = ldata->echo_overrun = 0;
+        mutex_unlock(&ldata->echo_lock);
 
-        tty->canon_head = tty->canon_data = tty->erasing = 0;
-        memset(&tty->read_flags, 0, sizeof tty->read_flags);
+        ldata->canon_head = ldata->canon_data = ldata->erasing = 0;
+        bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE);
         n_tty_set_room(tty);
 }
 
@@ -235,18 +272,19 @@ static void n_tty_flush_buffer(struct tty_struct *tty)
 
 static ssize_t n_tty_chars_in_buffer(struct tty_struct *tty)
 {
+        struct n_tty_data *ldata = tty->disc_data;
         unsigned long flags;
         ssize_t n = 0;
 
-        spin_lock_irqsave(&tty->read_lock, flags);
-        if (!tty->icanon) {
-                n = tty->read_cnt;
-        } else if (tty->canon_data) {
-                n = (tty->canon_head > tty->read_tail) ?
-                        tty->canon_head - tty->read_tail :
-                        tty->canon_head + (N_TTY_BUF_SIZE - tty->read_tail);
+        spin_lock_irqsave(&ldata->read_lock, flags);
+        if (!ldata->icanon) {
+                n = ldata->read_cnt;
+        } else if (ldata->canon_data) {
+                n = (ldata->canon_head > ldata->read_tail) ?
+                        ldata->canon_head - ldata->read_tail :
+                        ldata->canon_head + (N_TTY_BUF_SIZE - ldata->read_tail);
         }
-        spin_unlock_irqrestore(&tty->read_lock, flags);
+        spin_unlock_irqrestore(&ldata->read_lock, flags);
         return n;
 }
 
@@ -301,6 +339,7 @@ static inline int is_continuation(unsigned char c, struct tty_struct *tty)
 
 static int do_output_char(unsigned char c, struct tty_struct *tty, int space)
 {
+        struct n_tty_data *ldata = tty->disc_data;
         int     spaces;
 
         if (!space)
@@ -309,48 +348,48 @@ static int do_output_char(unsigned char c, struct tty_struct *tty, int space)
         switch (c) {
         case '\n':
                 if (O_ONLRET(tty))
-                        tty->column = 0;
+                        ldata->column = 0;
                 if (O_ONLCR(tty)) {
                         if (space < 2)
                                 return -1;
-                        tty->canon_column = tty->column = 0;
+                        ldata->canon_column = ldata->column = 0;
                         tty->ops->write(tty, "\r\n", 2);
                         return 2;
                 }
-                tty->canon_column = tty->column;
+                ldata->canon_column = ldata->column;
                 break;
         case '\r':
-                if (O_ONOCR(tty) && tty->column == 0)
+                if (O_ONOCR(tty) && ldata->column == 0)
                         return 0;
                 if (O_OCRNL(tty)) {
                         c = '\n';
                         if (O_ONLRET(tty))
-                                tty->canon_column = tty->column = 0;
+                                ldata->canon_column = ldata->column = 0;
                         break;
                 }
-                tty->canon_column = tty->column = 0;
+                ldata->canon_column = ldata->column = 0;
                 break;
         case '\t':
-                spaces = 8 - (tty->column & 7);
+                spaces = 8 - (ldata->column & 7);
                 if (O_TABDLY(tty) == XTABS) {
                         if (space < spaces)
                                 return -1;
-                        tty->column += spaces;
+                        ldata->column += spaces;
                         tty->ops->write(tty, "        ", spaces);
                         return spaces;
                 }
-                tty->column += spaces;
+                ldata->column += spaces;
                 break;
         case '\b':
-                if (tty->column > 0)
-                        tty->column--;
+                if (ldata->column > 0)
+                        ldata->column--;
                 break;
         default:
                 if (!iscntrl(c)) {
                         if (O_OLCUC(tty))
                                 c = toupper(c);
                         if (!is_continuation(c, tty))
-                                tty->column++;
+                                ldata->column++;
                 }
                 break;
         }
@@ -375,14 +414,15 @@ static int do_output_char(unsigned char c, struct tty_struct *tty, int space)
 
 static int process_output(unsigned char c, struct tty_struct *tty)
 {
+        struct n_tty_data *ldata = tty->disc_data;
         int     space, retval;
 
-        mutex_lock(&tty->output_lock);
+        mutex_lock(&ldata->output_lock);
 
         space = tty_write_room(tty);
         retval = do_output_char(c, tty, space);
 
-        mutex_unlock(&tty->output_lock);
+        mutex_unlock(&ldata->output_lock);
         if (retval < 0)
                 return -1;
         else
@@ -411,15 +451,16 @@ static int process_output(unsigned char c, struct tty_struct *tty)
 static ssize_t process_output_block(struct tty_struct *tty,
                                     const unsigned char *buf, unsigned int nr)
 {
+        struct n_tty_data *ldata = tty->disc_data;
         int     space;
         int     i;
         const unsigned char *cp;
 
-        mutex_lock(&tty->output_lock);
+        mutex_lock(&ldata->output_lock);
 
         space = tty_write_room(tty);
         if (!space) {
-                mutex_unlock(&tty->output_lock);
+                mutex_unlock(&ldata->output_lock);
                 return 0;
         }
         if (nr > space)
@@ -431,30 +472,30 @@ static ssize_t process_output_block(struct tty_struct *tty,
                 switch (c) {
                 case '\n':
                         if (O_ONLRET(tty))
-                                tty->column = 0;
+                                ldata->column = 0;
                         if (O_ONLCR(tty))
                                 goto break_out;
-                        tty->canon_column = tty->column;
+                        ldata->canon_column = ldata->column;
                         break;
                 case '\r':
-                        if (O_ONOCR(tty) && tty->column == 0)
+                        if (O_ONOCR(tty) && ldata->column == 0)
                                 goto break_out;
                         if (O_OCRNL(tty))
                                 goto break_out;
-                        tty->canon_column = tty->column = 0;
+                        ldata->canon_column = ldata->column = 0;
                         break;
                 case '\t':
                         goto break_out;
                 case '\b':
-                        if (tty->column > 0)
-                                tty->column--;
+                        if (ldata->column > 0)
+                                ldata->column--;
                         break;
                 default:
                         if (!iscntrl(c)) {
                                 if (O_OLCUC(tty))
                                         goto break_out;
                                 if (!is_continuation(c, tty))
-                                        tty->column++;
+                                        ldata->column++;
                         }
                         break;
                 }
@@ -462,7 +503,7 @@ static ssize_t process_output_block(struct tty_struct *tty,
 break_out:
         i = tty->ops->write(tty, buf, i);
 
-        mutex_unlock(&tty->output_lock);
+        mutex_unlock(&ldata->output_lock);
         return i;
 }
 
@@ -494,21 +535,22 @@ break_out:
 
 static void process_echoes(struct tty_struct *tty)
 {
+        struct n_tty_data *ldata = tty->disc_data;
         int     space, nr;
         unsigned char c;
         unsigned char *cp, *buf_end;
 
-        if (!tty->echo_cnt)
+        if (!ldata->echo_cnt)
                 return;
 
-        mutex_lock(&tty->output_lock);
-        mutex_lock(&tty->echo_lock);
+        mutex_lock(&ldata->output_lock);
+        mutex_lock(&ldata->echo_lock);
 
         space = tty_write_room(tty);
 
-        buf_end = tty->echo_buf + N_TTY_BUF_SIZE;
-        cp = tty->echo_buf + tty->echo_pos;
-        nr = tty->echo_cnt;
+        buf_end = ldata->echo_buf + N_TTY_BUF_SIZE;
+        cp = ldata->echo_buf + ldata->echo_pos;
+        nr = ldata->echo_cnt;
         while (nr > 0) {
                 c = *cp;
                 if (c == ECHO_OP_START) {
@@ -545,7 +587,7 @@ static void process_echoes(struct tty_struct *tty)
                                  * Otherwise, tab spacing is normal.
                                  */
                                 if (!(num_chars & 0x80))
-                                        num_chars += tty->canon_column;
+                                        num_chars += ldata->canon_column;
                                 num_bs = 8 - (num_chars & 7);
 
                                 if (num_bs > space) {
@@ -555,22 +597,22 @@ static void process_echoes(struct tty_struct *tty)
                                 space -= num_bs;
                                 while (num_bs--) {
                                         tty_put_char(tty, '\b');
-                                        if (tty->column > 0)
-                                                tty->column--;
+                                        if (ldata->column > 0)
+                                                ldata->column--;
                                 }
                                 cp += 3;
                                 nr -= 3;
                                 break;
 
                         case ECHO_OP_SET_CANON_COL:
-                                tty->canon_column = tty->column;
+                                ldata->canon_column = ldata->column;
                                 cp += 2;
                                 nr -= 2;
                                 break;
 
                         case ECHO_OP_MOVE_BACK_COL:
-                                if (tty->column > 0)
-                                        tty->column--;
+                                if (ldata->column > 0)
+                                        ldata->column--;
                                 cp += 2;
                                 nr -= 2;
                                 break;
@@ -582,7 +624,7 @@ static void process_echoes(struct tty_struct *tty)
                                         break;
                                 }
                                 tty_put_char(tty, ECHO_OP_START);
-                                tty->column++;
+                                ldata->column++;
                                 space--;
                                 cp += 2;
                                 nr -= 2;
@@ -604,7 +646,7 @@ static void process_echoes(struct tty_struct *tty)
                                 }
                                 tty_put_char(tty, '^');
                                 tty_put_char(tty, op ^ 0100);
-                                tty->column += 2;
+                                ldata->column += 2;
                                 space -= 2;
                                 cp += 2;
                                 nr -= 2;
@@ -635,20 +677,20 @@ static void process_echoes(struct tty_struct *tty)
         }
 
         if (nr == 0) {
-                tty->echo_pos = 0;
-                tty->echo_cnt = 0;
-                tty->echo_overrun = 0;
+                ldata->echo_pos = 0;
+                ldata->echo_cnt = 0;
+                ldata->echo_overrun = 0;
         } else {
-                int num_processed = tty->echo_cnt - nr;
-                tty->echo_pos += num_processed;
-                tty->echo_pos &= N_TTY_BUF_SIZE - 1;
-                tty->echo_cnt = nr;
+                int num_processed = ldata->echo_cnt - nr;
+                ldata->echo_pos += num_processed;
+                ldata->echo_pos &= N_TTY_BUF_SIZE - 1;
+                ldata->echo_cnt = nr;
                 if (num_processed > 0)
-                        tty->echo_overrun = 0;
+                        ldata->echo_overrun = 0;
         }
 
-        mutex_unlock(&tty->echo_lock);
-        mutex_unlock(&tty->output_lock);
+        mutex_unlock(&ldata->echo_lock);
+        mutex_unlock(&ldata->output_lock);
 
         if (tty->ops->flush_chars)
                 tty->ops->flush_chars(tty);
@@ -657,72 +699,70 @@ static void process_echoes(struct tty_struct *tty)
 /**
  *      add_echo_byte   -       add a byte to the echo buffer
  *      @c: unicode byte to echo
- *      @tty: terminal device
+ *      @ldata: n_tty data
  *
  *      Add a character or operation byte to the echo buffer.
  *
  *      Should be called under the echo lock to protect the echo buffer.
  */
 
-static void add_echo_byte(unsigned char c, struct tty_struct *tty)
+static void add_echo_byte(unsigned char c, struct n_tty_data *ldata)
 {
         int     new_byte_pos;
 
-        if (tty->echo_cnt == N_TTY_BUF_SIZE) {
+        if (ldata->echo_cnt == N_TTY_BUF_SIZE) {
                 /* Circular buffer is already at capacity */
-                new_byte_pos = tty->echo_pos;
+                new_byte_pos = ldata->echo_pos;
 
                 /*
                  * Since the buffer start position needs to be advanced,
                  * be sure to step by a whole operation byte group.
                  */
-                if (tty->echo_buf[tty->echo_pos] == ECHO_OP_START) {
-                        if (tty->echo_buf[(tty->echo_pos + 1) &
+                if (ldata->echo_buf[ldata->echo_pos] == ECHO_OP_START) {
+                        if (ldata->echo_buf[(ldata->echo_pos + 1) &
                                           (N_TTY_BUF_SIZE - 1)] ==
                                                 ECHO_OP_ERASE_TAB) {
-                                tty->echo_pos += 3;
-                                tty->echo_cnt -= 2;
+                                ldata->echo_pos += 3;
+                                ldata->echo_cnt -= 2;
                         } else {
-                                tty->echo_pos += 2;
-                                tty->echo_cnt -= 1;
+                                ldata->echo_pos += 2;
+                                ldata->echo_cnt -= 1;
                         }
                 } else {
-                        tty->echo_pos++;
+                        ldata->echo_pos++;
                 }
-                tty->echo_pos &= N_TTY_BUF_SIZE - 1;
+                ldata->echo_pos &= N_TTY_BUF_SIZE - 1;
 
-                tty->echo_overrun = 1;
+                ldata->echo_overrun = 1;
         } else {
-                new_byte_pos = tty->echo_pos + tty->echo_cnt;
+                new_byte_pos = ldata->echo_pos + ldata->echo_cnt;
                 new_byte_pos &= N_TTY_BUF_SIZE - 1;
-                tty->echo_cnt++;
+                ldata->echo_cnt++;
         }
 
-        tty->echo_buf[new_byte_pos] = c;
+        ldata->echo_buf[new_byte_pos] = c;
 }
 
 /**
  *      echo_move_back_col      -       add operation to move back a column
- *      @tty: terminal device
+ *      @ldata: n_tty data
  *
  *      Add an operation to the echo buffer to move back one column.
  *
  *      Locking: echo_lock to protect the echo buffer
  */
 
-static void echo_move_back_col(struct tty_struct *tty)
+static void echo_move_back_col(struct n_tty_data *ldata)
 {
-        mutex_lock(&tty->echo_lock);
-
-        add_echo_byte(ECHO_OP_START, tty);
-        add_echo_byte(ECHO_OP_MOVE_BACK_COL, tty);
-
-        mutex_unlock(&tty->echo_lock);
+        mutex_lock(&ldata->echo_lock);
+        add_echo_byte(ECHO_OP_START, ldata);
+        add_echo_byte(ECHO_OP_MOVE_BACK_COL, ldata);
+        mutex_unlock(&ldata->echo_lock);
 }
 
 /**
  *      echo_set_canon_col      -       add operation to set the canon column
- *      @tty: terminal device
+ *      @ldata: n_tty data
  *
  *      Add an operation to the echo buffer to set the canon column
  *      to the current column.
@@ -730,21 +770,19 @@ static void echo_move_back_col(struct tty_struct *tty)
  *      Locking: echo_lock to protect the echo buffer
  */
 
-static void echo_set_canon_col(struct tty_struct *tty)
+static void echo_set_canon_col(struct n_tty_data *ldata)
 {
-        mutex_lock(&tty->echo_lock);
-
-        add_echo_byte(ECHO_OP_START, tty);
-        add_echo_byte(ECHO_OP_SET_CANON_COL, tty);
-
-        mutex_unlock(&tty->echo_lock);
+        mutex_lock(&ldata->echo_lock);
+        add_echo_byte(ECHO_OP_START, ldata);
+        add_echo_byte(ECHO_OP_SET_CANON_COL, ldata);
+        mutex_unlock(&ldata->echo_lock);
 }
 
 /**
  *      echo_erase_tab  -       add operation to erase a tab
  *      @num_chars: number of character columns already used
  *      @after_tab: true if num_chars starts after a previous tab
- *      @tty: terminal device
+ *      @ldata: n_tty data
  *
  *      Add an operation to the echo buffer to erase a tab.
  *
@@ -758,12 +796,12 @@ static void echo_set_canon_col(struct tty_struct *tty)
  */
 
 static void echo_erase_tab(unsigned int num_chars, int after_tab,
-                           struct tty_struct *tty)
+                           struct n_tty_data *ldata)
 {
-        mutex_lock(&tty->echo_lock);
+        mutex_lock(&ldata->echo_lock);
 
-        add_echo_byte(ECHO_OP_START, tty);
-        add_echo_byte(ECHO_OP_ERASE_TAB, tty);
+        add_echo_byte(ECHO_OP_START, ldata);
+        add_echo_byte(ECHO_OP_ERASE_TAB, ldata);
 
         /* We only need to know this modulo 8 (tab spacing) */
         num_chars &= 7;
@@ -772,9 +810,9 @@ static void echo_erase_tab(unsigned int num_chars, int after_tab,
         if (after_tab)
                 num_chars |= 0x80;
 
-        add_echo_byte(num_chars, tty);
+        add_echo_byte(num_chars, ldata);
 
-        mutex_unlock(&tty->echo_lock);
+        mutex_unlock(&ldata->echo_lock);
 }
 
 /**
@@ -790,18 +828,16 @@ static void echo_erase_tab(unsigned int num_chars, int after_tab,
  *      Locking: echo_lock to protect the echo buffer
  */
 
-static void echo_char_raw(unsigned char c, struct tty_struct *tty)
+static void echo_char_raw(unsigned char c, struct n_tty_data *ldata)
 {
-        mutex_lock(&tty->echo_lock);
-
+        mutex_lock(&ldata->echo_lock);
         if (c == ECHO_OP_START) {
-                add_echo_byte(ECHO_OP_START, tty);
-                add_echo_byte(ECHO_OP_START, tty);
+                add_echo_byte(ECHO_OP_START, ldata);
+                add_echo_byte(ECHO_OP_START, ldata);
         } else {
-                add_echo_byte(c, tty);
+                add_echo_byte(c, ldata);
         }
-
-        mutex_unlock(&tty->echo_lock);
+        mutex_unlock(&ldata->echo_lock);
 }
 
 /**
@@ -820,30 +856,32 @@ static void echo_char_raw(unsigned char c, struct tty_struct *tty)
 
 static void echo_char(unsigned char c, struct tty_struct *tty)
 {
-        mutex_lock(&tty->echo_lock);
+        struct n_tty_data *ldata = tty->disc_data;
+
+        mutex_lock(&ldata->echo_lock);
 
         if (c == ECHO_OP_START) {
-                add_echo_byte(ECHO_OP_START, tty);
-                add_echo_byte(ECHO_OP_START, tty);
+                add_echo_byte(ECHO_OP_START, ldata);
+                add_echo_byte(ECHO_OP_START, ldata);
         } else {
                 if (L_ECHOCTL(tty) && iscntrl(c) && c != '\t')
-                        add_echo_byte(ECHO_OP_START, tty);
-                add_echo_byte(c, tty);
+                        add_echo_byte(ECHO_OP_START, ldata);
+                add_echo_byte(c, ldata);
         }
 
-        mutex_unlock(&tty->echo_lock);
+        mutex_unlock(&ldata->echo_lock);
 }
 
 /**
  *      finish_erasing          -       complete erase
- *      @tty: tty doing the erase
+ *      @ldata: n_tty data
  */
 
-static inline void finish_erasing(struct tty_struct *tty)
+static inline void finish_erasing(struct n_tty_data *ldata)
 {
-        if (tty->erasing) {
-                echo_char_raw('/', tty);
-                tty->erasing = 0;
+        if (ldata->erasing) {
+                echo_char_raw('/', ldata);
+                ldata->erasing = 0;
         }
 }
 
@@ -861,12 +899,13 @@ static inline void finish_erasing(struct tty_struct *tty)
 
 static void eraser(unsigned char c, struct tty_struct *tty)
 {
+        struct n_tty_data *ldata = tty->disc_data;
         enum { ERASE, WERASE, KILL } kill_type;
         int head, seen_alnums, cnt;
         unsigned long flags;
 
         /* FIXME: locking needed ? */
-        if (tty->read_head == tty->canon_head) {
+        if (ldata->read_head == ldata->canon_head) {
                 /* process_output('\a', tty); */ /* what do you think? */
                 return;
         }
@@ -876,24 +915,24 @@ static void eraser(unsigned char c, struct tty_struct *tty)
                 kill_type = WERASE;
         else {
                 if (!L_ECHO(tty)) {
-                        spin_lock_irqsave(&tty->read_lock, flags);
-                        tty->read_cnt -= ((tty->read_head - tty->canon_head) &
+                        spin_lock_irqsave(&ldata->read_lock, flags);
+                        ldata->read_cnt -= ((ldata->read_head - ldata->canon_head) &
                                           (N_TTY_BUF_SIZE - 1));
-                        tty->read_head = tty->canon_head;
-                        spin_unlock_irqrestore(&tty->read_lock, flags);
+                        ldata->read_head = ldata->canon_head;
+                        spin_unlock_irqrestore(&ldata->read_lock, flags);
                         return;
                 }
                 if (!L_ECHOK(tty) || !L_ECHOKE(tty) || !L_ECHOE(tty)) {
-                        spin_lock_irqsave(&tty->read_lock, flags);
-                        tty->read_cnt -= ((tty->read_head - tty->canon_head) &
+                        spin_lock_irqsave(&ldata->read_lock, flags);
+                        ldata->read_cnt -= ((ldata->read_head - ldata->canon_head) &
                                           (N_TTY_BUF_SIZE - 1));
-                        tty->read_head = tty->canon_head;
-                        spin_unlock_irqrestore(&tty->read_lock, flags);
-                        finish_erasing(tty);
+                        ldata->read_head = ldata->canon_head;
+                        spin_unlock_irqrestore(&ldata->read_lock, flags);
+                        finish_erasing(ldata);
                         echo_char(KILL_CHAR(tty), tty);
                         /* Add a newline if ECHOK is on and ECHOKE is off. */
                         if (L_ECHOK(tty))
-                                echo_char_raw('\n', tty);
+                                echo_char_raw('\n', ldata);
                         return;
                 }
                 kill_type = KILL;
@@ -901,14 +940,14 @@ static void eraser(unsigned char c, struct tty_struct *tty)
 
         seen_alnums = 0;
         /* FIXME: Locking ?? */
-        while (tty->read_head != tty->canon_head) {
-                head = tty->read_head;
+        while (ldata->read_head != ldata->canon_head) {
+                head = ldata->read_head;
 
                 /* erase a single possibly multibyte character */
                 do {
                         head = (head - 1) & (N_TTY_BUF_SIZE-1);
-                        c = tty->read_buf[head];
-                } while (is_continuation(c, tty) && head != tty->canon_head);
+                        c = ldata->read_buf[head];
+                } while (is_continuation(c, tty) && head != ldata->canon_head);
 
                 /* do not partially erase */
                 if (is_continuation(c, tty))
@@ -921,30 +960,31 @@ static void eraser(unsigned char c, struct tty_struct *tty)
                         else if (seen_alnums)
                                 break;
                 }
-                cnt = (tty->read_head - head) & (N_TTY_BUF_SIZE-1);
-                spin_lock_irqsave(&tty->read_lock, flags);
-                tty->read_head = head;
-                tty->read_cnt -= cnt;
-                spin_unlock_irqrestore(&tty->read_lock, flags);
+                cnt = (ldata->read_head - head) & (N_TTY_BUF_SIZE-1);
+                spin_lock_irqsave(&ldata->read_lock, flags);
+                ldata->read_head = head;
+                ldata->read_cnt -= cnt;
+                spin_unlock_irqrestore(&ldata->read_lock, flags);
                 if (L_ECHO(tty)) {
                         if (L_ECHOPRT(tty)) {
-                                if (!tty->erasing) {
-                                        echo_char_raw('\\', tty);
-                                        tty->erasing = 1;
+                                if (!ldata->erasing) {
+                                        echo_char_raw('\\', ldata);
+                                        ldata->erasing = 1;
                                 }
                                 /* if cnt > 1, output a multi-byte character */
                                 echo_char(c, tty);
                                 while (--cnt > 0) {
                                         head = (head+1) & (N_TTY_BUF_SIZE-1);
-                                        echo_char_raw(tty->read_buf[head], tty);
-                                        echo_move_back_col(tty);
+                                        echo_char_raw(ldata->read_buf[head],
+                                                        ldata);
+                                        echo_move_back_col(ldata);
                                 }
                         } else if (kill_type == ERASE && !L_ECHOE(tty)) {
                                 echo_char(ERASE_CHAR(tty), tty);
                         } else if (c == '\t') {
                                 unsigned int num_chars = 0;
                                 int after_tab = 0;
-                                unsigned long tail = tty->read_head;
+                                unsigned long tail = ldata->read_head;
 
                                 /*
                                  * Count the columns used for characters
@@ -953,9 +993,9 @@ static void eraser(unsigned char c, struct tty_struct *tty)
                                  * This info is used to go back the correct
                                  * number of columns.
                                  */
-                                while (tail != tty->canon_head) {
+                                while (tail != ldata->canon_head) {
                                         tail = (tail-1) & (N_TTY_BUF_SIZE-1);
-                                        c = tty->read_buf[tail];
+                                        c = ldata->read_buf[tail];
                                         if (c == '\t') {
                                                 after_tab = 1;
                                                 break;
@@ -966,25 +1006,25 @@ static void eraser(unsigned char c, struct tty_struct *tty)
                                                 num_chars++;
                                         }
                                 }
-                                echo_erase_tab(num_chars, after_tab, tty);
+                                echo_erase_tab(num_chars, after_tab, ldata);
                         } else {
                                 if (iscntrl(c) && L_ECHOCTL(tty)) {
-                                        echo_char_raw('\b', tty);
-                                        echo_char_raw(' ', tty);
-                                        echo_char_raw('\b', tty);
+                                        echo_char_raw('\b', ldata);
+                                        echo_char_raw(' ', ldata);
+                                        echo_char_raw('\b', ldata);
                                 }
                                 if (!iscntrl(c) || L_ECHOCTL(tty)) {
-                                        echo_char_raw('\b', tty);
-                                        echo_char_raw(' ', tty);
-                                        echo_char_raw('\b', tty);
+                                        echo_char_raw('\b', ldata);
+                                        echo_char_raw(' ', ldata);
+                                        echo_char_raw('\b', ldata);
                                 }
                         }
                 }
                 if (kill_type == ERASE)
                         break;
         }
-        if (tty->read_head == tty->canon_head && L_ECHO(tty))
-                finish_erasing(tty);
+        if (ldata->read_head == ldata->canon_head && L_ECHO(tty))
+                finish_erasing(ldata);
 }
 
 /**
@@ -1023,6 +1063,8 @@ static inline void isig(int sig, struct tty_struct *tty, int flush)
 
 static inline void n_tty_receive_break(struct tty_struct *tty)
 {
+        struct n_tty_data *ldata = tty->disc_data;
+
         if (I_IGNBRK(tty))
                 return;
         if (I_BRKINT(tty)) {
@@ -1030,10 +1072,10 @@ static inline void n_tty_receive_break(struct tty_struct *tty)
                 return;
         }
         if (I_PARMRK(tty)) {
-                put_tty_queue('\377', tty);
-                put_tty_queue('\0', tty);
+                put_tty_queue('\377', ldata);
+                put_tty_queue('\0', ldata);
         }
-        put_tty_queue('\0', tty);
+        put_tty_queue('\0', ldata);
         wake_up_interruptible(&tty->read_wait);
 }
 
@@ -1052,16 +1094,17 @@ static inline void n_tty_receive_break(struct tty_struct *tty)
 
 static inline void n_tty_receive_overrun(struct tty_struct *tty)
 {
+        struct n_tty_data *ldata = tty->disc_data;
         char buf[64];
 
-        tty->num_overrun++;
-        if (time_before(tty->overrun_time, jiffies - HZ) ||
-                        time_after(tty->overrun_time, jiffies)) {
+        ldata->num_overrun++;
+        if (time_after(jiffies, ldata->overrun_time + HZ) ||
+                        time_after(ldata->overrun_time, jiffies)) {
                 printk(KERN_WARNING "%s: %d input overrun(s)\n",
                         tty_name(tty, buf),
-                        tty->num_overrun);
-                tty->overrun_time = jiffies;
-                tty->num_overrun = 0;
+                        ldata->num_overrun);
+                ldata->overrun_time = jiffies;
+                ldata->num_overrun = 0;
         }
 }
 
@@ -1076,16 +1119,18 @@ static inline void n_tty_receive_overrun(struct tty_struct *tty)
 static inline void n_tty_receive_parity_error(struct tty_struct *tty,
                                               unsigned char c)
 {
+        struct n_tty_data *ldata = tty->disc_data;
+
         if (I_IGNPAR(tty))
                 return;
         if (I_PARMRK(tty)) {
-                put_tty_queue('\377', tty);
-                put_tty_queue('\0', tty);
-                put_tty_queue(c, tty);
+                put_tty_queue('\377', ldata);
+                put_tty_queue('\0', ldata);
+                put_tty_queue(c, ldata);
         } else  if (I_INPCK(tty))
-                put_tty_queue('\0', tty);
+                put_tty_queue('\0', ldata);
         else
-                put_tty_queue(c, tty);
+                put_tty_queue(c, ldata);
         wake_up_interruptible(&tty->read_wait);
 }
 
@@ -1101,11 +1146,12 @@ static inline void n_tty_receive_parity_error(struct tty_struct *tty,
 
 static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
 {
+        struct n_tty_data *ldata = tty->disc_data;
         unsigned long flags;
         int parmrk;
 
-        if (tty->raw) {
-                put_tty_queue(c, tty);
+        if (ldata->raw) {
+                put_tty_queue(c, ldata);
                 return;
         }
 
@@ -1115,7 +1161,7 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
                 c = tolower(c);
 
         if (L_EXTPROC(tty)) {
-                put_tty_queue(c, tty);
+                put_tty_queue(c, ldata);
                 return;
         }
 
@@ -1143,26 +1189,26 @@ static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
          * handle specially, do shortcut processing to speed things
          * up.
          */
-        if (!test_bit(c, tty->process_char_map) || tty->lnext) {
-                tty->lnext = 0;
+        if (!test_bit(c, ldata->process_char_map) || ldata->lnext) {
+                ldata->lnext = 0;
                 parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) ? 1 : 0;
-                if (tty->read_cnt >= (N_TTY_BUF_SIZE - parmrk - 1)) {
+                if (ldata->read_cnt >= (N_TTY_BUF_SIZE - parmrk - 1)) {
                         /* beep if no space */
                         if (L_ECHO(tty))
                                 process_output('\a', tty);
                         return;
                 }
                 if (L_ECHO(tty)) {
-                        finish_erasing(tty);
+                        finish_erasing(ldata);
                         /* Record the column of first canon char. */
-                        if (tty->canon_head == tty->read_head)
-                                echo_set_canon_col(tty);
+                        if (ldata->canon_head == ldata->read_head)
+                                echo_set_canon_col(ldata);
                         echo_char(c, tty);
                         process_echoes(tty);
                 }
                 if (parmrk)
-                        put_tty_queue(c, tty);
-                put_tty_queue(c, tty);
+                        put_tty_queue(c, ldata);
+                put_tty_queue(c, ldata);
                 return;
         }
 
@@ -1218,7 +1264,7 @@ send_signal:
         } else if (c == '\n' && I_INLCR(tty))
                 c = '\r';
 
-        if (tty->icanon) {
+        if (ldata->icanon) {
                 if (c == ERASE_CHAR(tty) || c == KILL_CHAR(tty) ||
                     (c == WERASE_CHAR(tty) && L_IEXTEN(tty))) {
                         eraser(c, tty);
@@ -1226,12 +1272,12 @@ send_signal:
                         return;
                 }
                 if (c == LNEXT_CHAR(tty) && L_IEXTEN(tty)) {
-                        tty->lnext = 1;
+                        ldata->lnext = 1;
                         if (L_ECHO(tty)) {
-                                finish_erasing(tty);
+                                finish_erasing(ldata);
                                 if (L_ECHOCTL(tty)) {
-                                        echo_char_raw('^', tty);
-                                        echo_char_raw('\b', tty);
+                                        echo_char_raw('^', ldata);
+                                        echo_char_raw('\b', ldata);
                                         process_echoes(tty);
                                 }
                         }
@@ -1239,34 +1285,34 @@ send_signal:
                 }
                 if (c == REPRINT_CHAR(tty) && L_ECHO(tty) &&
                     L_IEXTEN(tty)) {
-                        unsigned long tail = tty->canon_head;
+                        unsigned long tail = ldata->canon_head;
 
-                        finish_erasing(tty);
+                        finish_erasing(ldata);
                         echo_char(c, tty);
-                        echo_char_raw('\n', tty);
-                        while (tail != tty->read_head) {
-                                echo_char(tty->read_buf[tail], tty);
+                        echo_char_raw('\n', ldata);
+                        while (tail != ldata->read_head) {
+                                echo_char(ldata->read_buf[tail], tty);
                                 tail = (tail+1) & (N_TTY_BUF_SIZE-1);
                         }
                         process_echoes(tty);
                         return;
                 }
                 if (c == '\n') {
-                        if (tty->read_cnt >= N_TTY_BUF_SIZE) {
+                        if (ldata->read_cnt >= N_TTY_BUF_SIZE) {
                                 if (L_ECHO(tty))
                                         process_output('\a', tty);
                                 return;
                         }
                         if (L_ECHO(tty) || L_ECHONL(tty)) {
-                                echo_char_raw('\n', tty);
+                                echo_char_raw('\n', ldata);
                                 process_echoes(tty);
                         }
                         goto handle_newline;
                 }
                 if (c == EOF_CHAR(tty)) {
-                        if (tty->read_cnt >= N_TTY_BUF_SIZE)
+                        if (ldata->read_cnt >= N_TTY_BUF_SIZE)
                                 return;
-                        if (tty->canon_head != tty->read_head)
+                        if (ldata->canon_head != ldata->read_head)
                                 set_bit(TTY_PUSH, &tty->flags);
                         c = __DISABLED_CHAR;
                         goto handle_newline;
@@ -1275,7 +1321,7 @@ send_signal:
                     (c == EOL2_CHAR(tty) && L_IEXTEN(tty))) {
                         parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty))
                                  ? 1 : 0;
-                        if (tty->read_cnt >= (N_TTY_BUF_SIZE - parmrk)) {
+                        if (ldata->read_cnt >= (N_TTY_BUF_SIZE - parmrk)) {
                                 if (L_ECHO(tty))
                                         process_output('\a', tty);
                                 return;
@@ -1285,8 +1331,8 @@ send_signal:
                          */
                         if (L_ECHO(tty)) {
                                 /* Record the column of first canon char. */
-                                if (tty->canon_head == tty->read_head)
-                                        echo_set_canon_col(tty);
+                                if (ldata->canon_head == ldata->read_head)
+                                        echo_set_canon_col(ldata);
                                 echo_char(c, tty);
                                 process_echoes(tty);
                         }
@@ -1295,15 +1341,15 @@ send_signal:
                          * EOL_CHAR and EOL2_CHAR?
                          */
                         if (parmrk)
-                                put_tty_queue(c, tty);
+                                put_tty_queue(c, ldata);
 
 handle_newline:
-                        spin_lock_irqsave(&tty->read_lock, flags);
-                        set_bit(tty->read_head, tty->read_flags);
-                        put_tty_queue_nolock(c, tty);
-                        tty->canon_head = tty->read_head;
-                        tty->canon_data++;
-                        spin_unlock_irqrestore(&tty->read_lock, flags);
+                        spin_lock_irqsave(&ldata->read_lock, flags);
+                        set_bit(ldata->read_head, ldata->read_flags);
+                        put_tty_queue_nolock(c, ldata);
+                        ldata->canon_head = ldata->read_head;
+                        ldata->canon_data++;
+                        spin_unlock_irqrestore(&ldata->read_lock, flags);
                         kill_fasync(&tty->fasync, SIGIO, POLL_IN);
                         if (waitqueue_active(&tty->read_wait))
                                 wake_up_interruptible(&tty->read_wait);
@@ -1312,29 +1358,29 @@ handle_newline:
         }
 
         parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) ? 1 : 0;
-        if (tty->read_cnt >= (N_TTY_BUF_SIZE - parmrk - 1)) {
+        if (ldata->read_cnt >= (N_TTY_BUF_SIZE - parmrk - 1)) {
                 /* beep if no space */
                 if (L_ECHO(tty))
                         process_output('\a', tty);
                 return;
         }
         if (L_ECHO(tty)) {
-                finish_erasing(tty);
+                finish_erasing(ldata);
                 if (c == '\n')
-                        echo_char_raw('\n', tty);
+                        echo_char_raw('\n', ldata);
                 else {
                         /* Record the column of first canon char. */
-                        if (tty->canon_head == tty->read_head)
-                                echo_set_canon_col(tty);
+                        if (ldata->canon_head == ldata->read_head)
+                                echo_set_canon_col(ldata);
                         echo_char(c, tty);
                 }
                 process_echoes(tty);
         }
 
         if (parmrk)
-                put_tty_queue(c, tty);
+                put_tty_queue(c, ldata);
 
-        put_tty_queue(c, tty);
+        put_tty_queue(c, ldata);
 }
 
 
@@ -1369,33 +1415,31 @@ static void n_tty_write_wakeup(struct tty_struct *tty)
 static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
                               char *fp, int count)
 {
+        struct n_tty_data *ldata = tty->disc_data;
         const unsigned char *p;
         char *f, flags = TTY_NORMAL;
         int     i;
         char    buf[64];
         unsigned long cpuflags;
 
-        if (!tty->read_buf)
-                return;
-
-        if (tty->real_raw) {
-                spin_lock_irqsave(&tty->read_lock, cpuflags);
-                i = min(N_TTY_BUF_SIZE - tty->read_cnt,
-                        N_TTY_BUF_SIZE - tty->read_head);
+        if (ldata->real_raw) {
+                spin_lock_irqsave(&ldata->read_lock, cpuflags);
+                i = min(N_TTY_BUF_SIZE - ldata->read_cnt,
+                        N_TTY_BUF_SIZE - ldata->read_head);
                 i = min(count, i);
-                memcpy(tty->read_buf + tty->read_head, cp, i);
-                tty->read_head = (tty->read_head + i) & (N_TTY_BUF_SIZE-1);
-                tty->read_cnt += i;
+                memcpy(ldata->read_buf + ldata->read_head, cp, i);
+                ldata->read_head = (ldata->read_head + i) & (N_TTY_BUF_SIZE-1);
+                ldata->read_cnt += i;
                 cp += i;
                 count -= i;
 
-                i = min(N_TTY_BUF_SIZE - tty->read_cnt,
-                        N_TTY_BUF_SIZE - tty->read_head);
+                i = min(N_TTY_BUF_SIZE - ldata->read_cnt,
+                        N_TTY_BUF_SIZE - ldata->read_head);
                 i = min(count, i);
-                memcpy(tty->read_buf + tty->read_head, cp, i);
-                tty->read_head = (tty->read_head + i) & (N_TTY_BUF_SIZE-1);
-                tty->read_cnt += i;
-                spin_unlock_irqrestore(&tty->read_lock, cpuflags);
+                memcpy(ldata->read_buf + ldata->read_head, cp, i);
+                ldata->read_head = (ldata->read_head + i) & (N_TTY_BUF_SIZE-1);
+                ldata->read_cnt += i;
+                spin_unlock_irqrestore(&ldata->read_lock, cpuflags);
         } else {
                 for (i = count, p = cp, f = fp; i; i--, p++) {
                         if (f)
@@ -1426,7 +1470,7 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
 
         n_tty_set_room(tty);
 
-        if ((!tty->icanon && (tty->read_cnt >= tty->minimum_to_wake)) ||
+        if ((!ldata->icanon && (ldata->read_cnt >= tty->minimum_to_wake)) ||
                 L_EXTPROC(tty)) {
                 kill_fasync(&tty->fasync, SIGIO, POLL_IN);
                 if (waitqueue_active(&tty->read_wait))
@@ -1470,25 +1514,25 @@ int is_ignored(int sig)
 
 static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
 {
+        struct n_tty_data *ldata = tty->disc_data;
         int canon_change = 1;
-        BUG_ON(!tty);
 
         if (old)
                 canon_change = (old->c_lflag ^ tty->termios.c_lflag) & ICANON;
         if (canon_change) {
-                memset(&tty->read_flags, 0, sizeof tty->read_flags);
-                tty->canon_head = tty->read_tail;
-                tty->canon_data = 0;
-                tty->erasing = 0;
+                bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE);
+                ldata->canon_head = ldata->read_tail;
+                ldata->canon_data = 0;
+                ldata->erasing = 0;
         }
 
-        if (canon_change && !L_ICANON(tty) && tty->read_cnt)
+        if (canon_change && !L_ICANON(tty) && ldata->read_cnt)
                 wake_up_interruptible(&tty->read_wait);
 
-        tty->icanon = (L_ICANON(tty) != 0);
+        ldata->icanon = (L_ICANON(tty) != 0);
         if (test_bit(TTY_HW_COOK_IN, &tty->flags)) {
-                tty->raw = 1;
-                tty->real_raw = 1;
+                ldata->raw = 1;
+                ldata->real_raw = 1;
                 n_tty_set_room(tty);
                 return;
         }
@@ -1496,51 +1540,51 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
             I_ICRNL(tty) || I_INLCR(tty) || L_ICANON(tty) ||
             I_IXON(tty) || L_ISIG(tty) || L_ECHO(tty) ||
             I_PARMRK(tty)) {
-                memset(tty->process_char_map, 0, 256/8);
+                bitmap_zero(ldata->process_char_map, 256);
 
                 if (I_IGNCR(tty) || I_ICRNL(tty))
-                        set_bit('\r', tty->process_char_map);
+                        set_bit('\r', ldata->process_char_map);
                 if (I_INLCR(tty))
-                        set_bit('\n', tty->process_char_map);
+                        set_bit('\n', ldata->process_char_map);
 
                 if (L_ICANON(tty)) {
-                        set_bit(ERASE_CHAR(tty), tty->process_char_map);
-                        set_bit(KILL_CHAR(tty), tty->process_char_map);
-                        set_bit(EOF_CHAR(tty), tty->process_char_map);
-                        set_bit('\n', tty->process_char_map);
-                        set_bit(EOL_CHAR(tty), tty->process_char_map);
+                        set_bit(ERASE_CHAR(tty), ldata->process_char_map);
+                        set_bit(KILL_CHAR(tty), ldata->process_char_map);
+                        set_bit(EOF_CHAR(tty), ldata->process_char_map);
+                        set_bit('\n', ldata->process_char_map);
+                        set_bit(EOL_CHAR(tty), ldata->process_char_map);
                         if (L_IEXTEN(tty)) {
                                 set_bit(WERASE_CHAR(tty),
-                                        tty->process_char_map);
+                                        ldata->process_char_map);
                                 set_bit(LNEXT_CHAR(tty),
-                                        tty->process_char_map);
+                                        ldata->process_char_map);
                                 set_bit(EOL2_CHAR(tty),
-                                        tty->process_char_map);
+                                        ldata->process_char_map);
                                 if (L_ECHO(tty))
                                         set_bit(REPRINT_CHAR(tty),
-                                                tty->process_char_map);
+                                                ldata->process_char_map);
                         }
                 }
                 if (I_IXON(tty)) {
-                        set_bit(START_CHAR(tty), tty->process_char_map);
-                        set_bit(STOP_CHAR(tty), tty->process_char_map);
+                        set_bit(START_CHAR(tty), ldata->process_char_map);
+                        set_bit(STOP_CHAR(tty), ldata->process_char_map);
                 }
                 if (L_ISIG(tty)) {
-                        set_bit(INTR_CHAR(tty), tty->process_char_map);
-                        set_bit(QUIT_CHAR(tty), tty->process_char_map);
-                        set_bit(SUSP_CHAR(tty), tty->process_char_map);
+                        set_bit(INTR_CHAR(tty), ldata->process_char_map);
+                        set_bit(QUIT_CHAR(tty), ldata->process_char_map);
+                        set_bit(SUSP_CHAR(tty), ldata->process_char_map);
                 }
-                clear_bit(__DISABLED_CHAR, tty->process_char_map);
-                tty->raw = 0;
-                tty->real_raw = 0;
+                clear_bit(__DISABLED_CHAR, ldata->process_char_map);
+                ldata->raw = 0;
+                ldata->real_raw = 0;
         } else {
-                tty->raw = 1;
+                ldata->raw = 1;
                 if ((I_IGNBRK(tty) || (!I_BRKINT(tty) && !I_PARMRK(tty))) &&
                     (I_IGNPAR(tty) || !I_INPCK(tty)) &&
                     (tty->driver->flags & TTY_DRIVER_REAL_RAW))
-                        tty->real_raw = 1;
+                        ldata->real_raw = 1;
                 else
-                        tty->real_raw = 0;
+                        ldata->real_raw = 0;
         }
         n_tty_set_room(tty);
         /* The termios change make the tty ready for I/O */
@@ -1560,15 +1604,13 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
 
 static void n_tty_close(struct tty_struct *tty)
 {
+        struct n_tty_data *ldata = tty->disc_data;
+
         n_tty_flush_buffer(tty);
-        if (tty->read_buf) {
-                kfree(tty->read_buf);
-                tty->read_buf = NULL;
-        }
-        if (tty->echo_buf) {
-                kfree(tty->echo_buf);
-                tty->echo_buf = NULL;
-        }
+        kfree(ldata->read_buf);
+        kfree(ldata->echo_buf);
+        kfree(ldata);
+        tty->disc_data = NULL;
 }
 
 /**
@@ -1583,37 +1625,50 @@ static void n_tty_close(struct tty_struct *tty)
 
 static int n_tty_open(struct tty_struct *tty)
 {
-        if (!tty)
-                return -EINVAL;
+        struct n_tty_data *ldata;
+
+        ldata = kzalloc(sizeof(*ldata), GFP_KERNEL);
+        if (!ldata)
+                goto err;
+
+        ldata->overrun_time = jiffies;
+        mutex_init(&ldata->atomic_read_lock);
+        mutex_init(&ldata->output_lock);
+        mutex_init(&ldata->echo_lock);
+        spin_lock_init(&ldata->read_lock);
 
         /* These are ugly. Currently a malloc failure here can panic */
-        if (!tty->read_buf) {
-                tty->read_buf = kzalloc(N_TTY_BUF_SIZE, GFP_KERNEL);
-                if (!tty->read_buf)
-                        return -ENOMEM;
-        }
-        if (!tty->echo_buf) {
-                tty->echo_buf = kzalloc(N_TTY_BUF_SIZE, GFP_KERNEL);
+        ldata->read_buf = kzalloc(N_TTY_BUF_SIZE, GFP_KERNEL);
+        ldata->echo_buf = kzalloc(N_TTY_BUF_SIZE, GFP_KERNEL);
+        if (!ldata->read_buf || !ldata->echo_buf)
+                goto err_free_bufs;
 
-                if (!tty->echo_buf)
-                        return -ENOMEM;
-        }
+        tty->disc_data = ldata;
         reset_buffer_flags(tty);
         tty_unthrottle(tty);
-        tty->column = 0;
+        ldata->column = 0;
         n_tty_set_termios(tty, NULL);
         tty->minimum_to_wake = 1;
         tty->closing = 0;
+
         return 0;
+err_free_bufs:
+        kfree(ldata->read_buf);
+        kfree(ldata->echo_buf);
+        kfree(ldata);
+err:
+        return -ENOMEM;
 }
 
 static inline int input_available_p(struct tty_struct *tty, int amt)
 {
+        struct n_tty_data *ldata = tty->disc_data;
+
         tty_flush_to_ldisc(tty);
-        if (tty->icanon && !L_EXTPROC(tty)) {
-                if (tty->canon_data)
+        if (ldata->icanon && !L_EXTPROC(tty)) {
+                if (ldata->canon_data)
                         return 1;
-        } else if (tty->read_cnt >= (amt ? amt : 1))
+        } else if (ldata->read_cnt >= (amt ? amt : 1))
                 return 1;
 
         return 0;
@@ -1632,7 +1687,7 @@ static inline int input_available_p(struct tty_struct *tty, int amt)
  *      buffer, and once to drain the space from the (physical) beginning of
  *      the buffer to head pointer.
  *
- *      Called under the tty->atomic_read_lock sem
+ *      Called under the ldata->atomic_read_lock sem
  *
  */
 
@@ -1641,29 +1696,31 @@ static int copy_from_read_buf(struct tty_struct *tty,
                                       size_t *nr)
 
 {
+        struct n_tty_data *ldata = tty->disc_data;
         int retval;
         size_t n;
         unsigned long flags;
         bool is_eof;
 
         retval = 0;
-        spin_lock_irqsave(&tty->read_lock, flags);
-        n = min(tty->read_cnt, N_TTY_BUF_SIZE - tty->read_tail);
+        spin_lock_irqsave(&ldata->read_lock, flags);
+        n = min(ldata->read_cnt, N_TTY_BUF_SIZE - ldata->read_tail);
         n = min(*nr, n);
-        spin_unlock_irqrestore(&tty->read_lock, flags);
+        spin_unlock_irqrestore(&ldata->read_lock, flags);
         if (n) {
-                retval = copy_to_user(*b, &tty->read_buf[tty->read_tail], n);
+                retval = copy_to_user(*b, &ldata->read_buf[ldata->read_tail], n);
                 n -= retval;
                 is_eof = n == 1 &&
-                        tty->read_buf[tty->read_tail] == EOF_CHAR(tty);
-                tty_audit_add_data(tty, &tty->read_buf[tty->read_tail], n);
-                spin_lock_irqsave(&tty->read_lock, flags);
-                tty->read_tail = (tty->read_tail + n) & (N_TTY_BUF_SIZE-1);
-                tty->read_cnt -= n;
+                        ldata->read_buf[ldata->read_tail] == EOF_CHAR(tty);
+                tty_audit_add_data(tty, &ldata->read_buf[ldata->read_tail], n,
+                                ldata->icanon);
+                spin_lock_irqsave(&ldata->read_lock, flags);
+                ldata->read_tail = (ldata->read_tail + n) & (N_TTY_BUF_SIZE-1);
+                ldata->read_cnt -= n;
                 /* Turn single EOF into zero-length read */
-                if (L_EXTPROC(tty) && tty->icanon && is_eof && !tty->read_cnt)
+                if (L_EXTPROC(tty) && ldata->icanon && is_eof && !ldata->read_cnt)
                         n = 0;
-                spin_unlock_irqrestore(&tty->read_lock, flags);
+                spin_unlock_irqrestore(&ldata->read_lock, flags);
                 *b += n;
                 *nr -= n;
         }
@@ -1730,6 +1787,7 @@ static int job_control(struct tty_struct *tty, struct file *file)
 static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
                          unsigned char __user *buf, size_t nr)
 {
+        struct n_tty_data *ldata = tty->disc_data;
         unsigned char __user *b = buf;
         DECLARE_WAITQUEUE(wait, current);
         int c;
@@ -1741,17 +1799,13 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
         int packet;
 
 do_it_again:
-
-        if (WARN_ON(!tty->read_buf))
-                return -EAGAIN;
-
         c = job_control(tty, file);
         if (c < 0)
                 return c;
 
         minimum = time = 0;
         timeout = MAX_SCHEDULE_TIMEOUT;
-        if (!tty->icanon) {
+        if (!ldata->icanon) {
                 time = (HZ / 10) * TIME_CHAR(tty);
                 minimum = MIN_CHAR(tty);
                 if (minimum) {
@@ -1774,10 +1828,10 @@ do_it_again:
          *      Internal serialization of reads.
          */
         if (file->f_flags & O_NONBLOCK) {
-                if (!mutex_trylock(&tty->atomic_read_lock))
+                if (!mutex_trylock(&ldata->atomic_read_lock))
                         return -EAGAIN;
         } else {
-                if (mutex_lock_interruptible(&tty->atomic_read_lock))
+                if (mutex_lock_interruptible(&ldata->atomic_read_lock))
                         return -ERESTARTSYS;
         }
         packet = tty->packet;
@@ -1830,7 +1884,6 @@ do_it_again:
                         /* FIXME: does n_tty_set_room need locking ? */
                         n_tty_set_room(tty);
                         timeout = schedule_timeout(timeout);
-                        BUG_ON(!tty->read_buf);
                         continue;
                 }
                 __set_current_state(TASK_RUNNING);
@@ -1845,45 +1898,45 @@ do_it_again:
                         nr--;
                 }
 
-                if (tty->icanon && !L_EXTPROC(tty)) {
+                if (ldata->icanon && !L_EXTPROC(tty)) {
                         /* N.B. avoid overrun if nr == 0 */
-                        spin_lock_irqsave(&tty->read_lock, flags);
-                        while (nr && tty->read_cnt) {
+                        spin_lock_irqsave(&ldata->read_lock, flags);
+                        while (nr && ldata->read_cnt) {
                                 int eol;
 
-                                eol = test_and_clear_bit(tty->read_tail,
-                                                tty->read_flags);
-                                c = tty->read_buf[tty->read_tail];
-                                tty->read_tail = ((tty->read_tail+1) &
+                                eol = test_and_clear_bit(ldata->read_tail,
+                                                ldata->read_flags);
+                                c = ldata->read_buf[ldata->read_tail];
+                                ldata->read_tail = ((ldata->read_tail+1) &
                                                   (N_TTY_BUF_SIZE-1));
-                                tty->read_cnt--;
+                                ldata->read_cnt--;
                                 if (eol) {
                                         /* this test should be redundant:
                                          * we shouldn't be reading data if
                                          * canon_data is 0
                                          */
-                                        if (--tty->canon_data < 0)
-                                                tty->canon_data = 0;
+                                        if (--ldata->canon_data < 0)
+                                                ldata->canon_data = 0;
                                 }
-                                spin_unlock_irqrestore(&tty->read_lock, flags);
+                                spin_unlock_irqrestore(&ldata->read_lock, flags);
 
                                 if (!eol || (c != __DISABLED_CHAR)) {
                                         if (tty_put_user(tty, c, b++)) {
                                                 retval = -EFAULT;
                                                 b--;
-                                                spin_lock_irqsave(&tty->read_lock, flags);
+                                                spin_lock_irqsave(&ldata->read_lock, flags);
                                                 break;
                                         }
                                         nr--;
                                 }
                                 if (eol) {
                                         tty_audit_push(tty);
-                                        spin_lock_irqsave(&tty->read_lock, flags);
+                                        spin_lock_irqsave(&ldata->read_lock, flags);
                                         break;
                                 }
-                                spin_lock_irqsave(&tty->read_lock, flags);
+                                spin_lock_irqsave(&ldata->read_lock, flags);
                         }
-                        spin_unlock_irqrestore(&tty->read_lock, flags);
+                        spin_unlock_irqrestore(&ldata->read_lock, flags);
                         if (retval)
                                 break;
                 } else {
@@ -1915,7 +1968,7 @@ do_it_again:
                 if (time)
                         timeout = time;
         }
-        mutex_unlock(&tty->atomic_read_lock);
+        mutex_unlock(&ldata->atomic_read_lock);
         remove_wait_queue(&tty->read_wait, &wait);
 
         if (!waitqueue_active(&tty->read_wait))
@@ -2076,19 +2129,19 @@ static unsigned int n_tty_poll(struct tty_struct *tty, struct file *file,
         return mask;
 }
 
-static unsigned long inq_canon(struct tty_struct *tty)
+static unsigned long inq_canon(struct n_tty_data *ldata)
 {
         int nr, head, tail;
 
-        if (!tty->canon_data)
+        if (!ldata->canon_data)
                 return 0;
-        head = tty->canon_head;
-        tail = tty->read_tail;
+        head = ldata->canon_head;
+        tail = ldata->read_tail;
         nr = (head - tail) & (N_TTY_BUF_SIZE-1);
         /* Skip EOF-chars.. */
         while (head != tail) {
-                if (test_bit(tail, tty->read_flags) &&
-                    tty->read_buf[tail] == __DISABLED_CHAR)
+                if (test_bit(tail, ldata->read_flags) &&
+                    ldata->read_buf[tail] == __DISABLED_CHAR)
                         nr--;
                 tail = (tail+1) & (N_TTY_BUF_SIZE-1);
         }
@@ -2098,6 +2151,7 @@ static unsigned long inq_canon(struct tty_struct *tty)
 static int n_tty_ioctl(struct tty_struct *tty, struct file *file,
                        unsigned int cmd, unsigned long arg)
 {
+        struct n_tty_data *ldata = tty->disc_data;
         int retval;
 
         switch (cmd) {
@@ -2105,9 +2159,9 @@ static int n_tty_ioctl(struct tty_struct *tty, struct file *file,
                 return put_user(tty_chars_in_buffer(tty), (int __user *) arg);
         case TIOCINQ:
                 /* FIXME: Locking */
-                retval = tty->read_cnt;
+                retval = ldata->read_cnt;
                 if (L_ICANON(tty))
-                        retval = inq_canon(tty);
+                        retval = inq_canon(ldata);
                 return put_user(retval, (unsigned int __user *) arg);
         default:
                 return n_tty_ioctl_helper(tty, file, cmd, arg);
diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c
index b917c9424954..a0c69ab04399 100644
--- a/drivers/tty/nozomi.c
+++ b/drivers/tty/nozomi.c
@@ -400,7 +400,7 @@ struct buffer {
 } __attribute__ ((packed));
 
 /*    Global variables */
-static const struct pci_device_id nozomi_pci_tbl[] __devinitconst = {
+static const struct pci_device_id nozomi_pci_tbl[] = {
         {PCI_DEVICE(0x1931, 0x000c)},   /* Nozomi HSDPA */
         {},
 };
@@ -1360,7 +1360,7 @@ static void remove_sysfs_files(struct nozomi *dc)
 }
 
 /* Allocate memory for one device */
-static int __devinit nozomi_card_init(struct pci_dev *pdev,
+static int nozomi_card_init(struct pci_dev *pdev,
                                       const struct pci_device_id *ent)
 {
         resource_size_t start;
@@ -1479,6 +1479,7 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev,
                 if (IS_ERR(tty_dev)) {
                         ret = PTR_ERR(tty_dev);
                         dev_err(&pdev->dev, "Could not allocate tty?\n");
+                        tty_port_destroy(&port->port);
                         goto err_free_tty;
                 }
         }
@@ -1486,8 +1487,10 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev,
         return 0;
 
 err_free_tty:
-        for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
-                tty_unregister_device(ntty_driver, i);
+        for (i = 0; i < MAX_PORT; ++i) {
+                tty_unregister_device(ntty_driver, dc->index_start + i);
+                tty_port_destroy(&dc->port[i].port);
+        }
 err_free_kfifo:
         for (i = 0; i < MAX_PORT; i++)
                 kfifo_free(&dc->port[i].fifo_ul);
@@ -1504,7 +1507,7 @@ err:
         return ret;
 }
 
-static void __devexit tty_exit(struct nozomi *dc)
+static void tty_exit(struct nozomi *dc)
 {
         unsigned int i;
 
@@ -1520,12 +1523,14 @@ static void __devexit tty_exit(struct nozomi *dc)
            complete off a hangup method ? */
         while (dc->open_ttys)
                 msleep(1);
-        for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
-                tty_unregister_device(ntty_driver, i);
+        for (i = 0; i < MAX_PORT; ++i) {
+                tty_unregister_device(ntty_driver, dc->index_start + i);
+                tty_port_destroy(&dc->port[i].port);
+        }
 }
 
 /* Deallocate memory for one device */
-static void __devexit nozomi_card_exit(struct pci_dev *pdev)
+static void nozomi_card_exit(struct pci_dev *pdev)
 {
         int i;
         struct ctrl_ul ctrl;
@@ -1903,7 +1908,7 @@ static struct pci_driver nozomi_driver = {
         .name = NOZOMI_NAME,
         .id_table = nozomi_pci_tbl,
         .probe = nozomi_card_init,
-        .remove = __devexit_p(nozomi_card_exit),
+        .remove = nozomi_card_exit,
 };
 
 static __init int nozomi_init(void)
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index a82b39939a9c..be6a373601b7 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -4,9 +4,6 @@
  *  Added support for a Unix98-style ptmx device.
  *    -- C. Scott Ananian <cananian@alumni.princeton.edu>, 14-Jan-1998
  *
- *  When reading this code see also fs/devpts. In particular note that the
- *  driver_data field is used by the devpts side as a binding to the devpts
- *  inode.
  */
 
 #include <linux/module.h>
@@ -59,7 +56,7 @@ static void pty_close(struct tty_struct *tty, struct file *filp)
 #ifdef CONFIG_UNIX98_PTYS
                 if (tty->driver == ptm_driver) {
                         mutex_lock(&devpts_mutex);
-                        devpts_pty_kill(tty->link);
+                        devpts_pty_kill(tty->link->driver_data);
                         mutex_unlock(&devpts_mutex);
                 }
 #endif
@@ -96,7 +93,7 @@ static void pty_unthrottle(struct tty_struct *tty)
 
 static int pty_space(struct tty_struct *to)
 {
-        int n = 8192 - to->buf.memory_used;
+        int n = 8192 - to->port->buf.memory_used;
         if (n < 0)
                 return 0;
         return n;
@@ -174,6 +171,41 @@ static int pty_set_lock(struct tty_struct *tty, int __user *arg)
         return 0;
 }
 
+static int pty_get_lock(struct tty_struct *tty, int __user *arg)
+{
+        int locked = test_bit(TTY_PTY_LOCK, &tty->flags);
+        return put_user(locked, arg);
+}
+
+/* Set the packet mode on a pty */
+static int pty_set_pktmode(struct tty_struct *tty, int __user *arg)
+{
+        unsigned long flags;
+        int pktmode;
+
+        if (get_user(pktmode, arg))
+                return -EFAULT;
+
+        spin_lock_irqsave(&tty->ctrl_lock, flags);
+        if (pktmode) {
+                if (!tty->packet) {
+                        tty->packet = 1;
+                        tty->link->ctrl_status = 0;
+                }
+        } else
+                tty->packet = 0;
+        spin_unlock_irqrestore(&tty->ctrl_lock, flags);
+
+        return 0;
+}
+
+/* Get the packet mode of a pty */
+static int pty_get_pktmode(struct tty_struct *tty, int __user *arg)
+{
+        int pktmode = tty->packet;
+        return put_user(pktmode, arg);
+}
+
 /* Send a signal to the slave */
 static int pty_signal(struct tty_struct *tty, int sig)
 {
@@ -245,7 +277,7 @@ static void pty_set_termios(struct tty_struct *tty,
  *      peform a terminal resize correctly
  */
 
-int pty_resize(struct tty_struct *tty,  struct winsize *ws)
+static int pty_resize(struct tty_struct *tty,  struct winsize *ws)
 {
         struct pid *pgrp, *rpgrp;
         unsigned long flags;
@@ -348,6 +380,7 @@ static int pty_common_install(struct tty_driver *driver, struct tty_struct *tty,
         tty_port_init(ports[1]);
         o_tty->port = ports[0];
         tty->port = ports[1];
+        o_tty->port->itty = o_tty;
 
         tty_driver_kref_get(driver);
         tty->count++;
@@ -366,9 +399,16 @@ err:
         return retval;
 }
 
+/* this is called once with whichever end is closed last */
+static void pty_unix98_shutdown(struct tty_struct *tty)
+{
+        devpts_kill_index(tty->driver_data, tty->index);
+}
+
 static void pty_cleanup(struct tty_struct *tty)
 {
-        kfree(tty->port);
+        tty->port->itty = NULL;
+        tty_port_put(tty->port);
 }
 
 /* Traditional BSD devices */
@@ -393,6 +433,12 @@ static int pty_bsd_ioctl(struct tty_struct *tty,
         switch (cmd) {
         case TIOCSPTLCK: /* Set PT Lock (disallow slave open) */
                 return pty_set_lock(tty, (int __user *) arg);
+        case TIOCGPTLCK: /* Get PT Lock status */
+                return pty_get_lock(tty, (int __user *)arg);
+        case TIOCPKT: /* Set PT packet mode */
+                return pty_set_pktmode(tty, (int __user *)arg);
+        case TIOCGPKT: /* Get PT packet mode */
+                return pty_get_pktmode(tty, (int __user *)arg);
         case TIOCSIG:    /* Send signal to other side of pty */
                 return pty_signal(tty, (int) arg);
         }
@@ -507,6 +553,12 @@ static int pty_unix98_ioctl(struct tty_struct *tty,
         switch (cmd) {
         case TIOCSPTLCK: /* Set PT Lock (disallow slave open) */
                 return pty_set_lock(tty, (int __user *)arg);
+        case TIOCGPTLCK: /* Get PT Lock status */
+                return pty_get_lock(tty, (int __user *)arg);
+        case TIOCPKT: /* Set PT packet mode */
+                return pty_set_pktmode(tty, (int __user *)arg);
+        case TIOCGPKT: /* Get PT packet mode */
+                return pty_get_pktmode(tty, (int __user *)arg);
         case TIOCGPTN: /* Get PT Number */
                 return put_user(tty->index, (unsigned int __user *)arg);
         case TIOCSIG:    /* Send signal to other side of pty */
@@ -547,7 +599,7 @@ static struct tty_struct *pts_unix98_lookup(struct tty_driver *driver,
         struct tty_struct *tty;
 
         mutex_lock(&devpts_mutex);
-        tty = devpts_get_tty(pts_inode, idx);
+        tty = devpts_get_priv(pts_inode);
         mutex_unlock(&devpts_mutex);
         /* Master must be open before slave */
         if (!tty)
@@ -581,6 +633,7 @@ static const struct tty_operations ptm_unix98_ops = {
         .set_termios = pty_set_termios,
         .ioctl = pty_unix98_ioctl,
         .resize = pty_resize,
+        .shutdown = pty_unix98_shutdown,
         .cleanup = pty_cleanup
 };
 
@@ -596,6 +649,7 @@ static const struct tty_operations pty_unix98_ops = {
         .chars_in_buffer = pty_chars_in_buffer,
         .unthrottle = pty_unthrottle,
         .set_termios = pty_set_termios,
+        .shutdown = pty_unix98_shutdown,
         .cleanup = pty_cleanup,
 };
 
@@ -614,6 +668,7 @@ static const struct tty_operations pty_unix98_ops = {
 static int ptmx_open(struct inode *inode, struct file *filp)
 {
         struct tty_struct *tty;
+        struct inode *slave_inode;
         int retval;
         int index;
 
@@ -650,15 +705,21 @@ static int ptmx_open(struct inode *inode, struct file *filp)
 
         tty_add_file(tty, filp);
 
-        retval = devpts_pty_new(inode, tty->link);
-        if (retval)
+        slave_inode = devpts_pty_new(inode,
+                        MKDEV(UNIX98_PTY_SLAVE_MAJOR, index), index,
+                        tty->link);
+        if (IS_ERR(slave_inode)) {
+                retval = PTR_ERR(slave_inode);
                 goto err_release;
+        }
 
         retval = ptm_driver->ops->open(tty, filp);
         if (retval)
                 goto err_release;
 
         tty_unlock(tty);
+        tty->driver_data = inode;
+        tty->link->driver_data = slave_inode;
         return 0;
 err_release:
         tty_unlock(tty);
diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c
index 9700d34b20a3..e42009a00529 100644
--- a/drivers/tty/rocket.c
+++ b/drivers/tty/rocket.c
@@ -673,6 +673,7 @@ static void init_r_port(int board, int aiop, int chan, struct pci_dev *pci_dev)
         if (sInitChan(ctlp, &info->channel, aiop, chan) == 0) {
                 printk(KERN_ERR "RocketPort sInitChan(%d, %d, %d) failed!\n",
                                 board, aiop, chan);
+                tty_port_destroy(&info->port);
                 kfree(info);
                 return;
         }
@@ -1757,7 +1758,7 @@ static void rp_flush_buffer(struct tty_struct *tty)
 
 #ifdef CONFIG_PCI
 
-static struct pci_device_id __devinitdata __used rocket_pci_ids[] = {
+static struct pci_device_id __used rocket_pci_ids[] = {
         { PCI_DEVICE(PCI_VENDOR_ID_RP, PCI_ANY_ID) },
         { }
 };
@@ -2357,6 +2358,7 @@ static void rp_cleanup_module(void)
         for (i = 0; i < MAX_RP_PORTS; i++)
                 if (rp_table[i]) {
                         tty_unregister_device(rocket_driver, i);
+                        tty_port_destroy(&rp_table[i]->port);
                         kfree(rp_table[i]);
                 }
 
diff --git a/drivers/tty/serial/68328serial.c b/drivers/tty/serial/68328serial.c
index 66c38a3f74ce..f99a84526f82 100644
--- a/drivers/tty/serial/68328serial.c
+++ b/drivers/tty/serial/68328serial.c
@@ -1225,6 +1225,8 @@ rs68328_init(void)
 
         if (tty_register_driver(serial_driver)) {
                 put_tty_driver(serial_driver);
+                for (i = 0; i < NR_PORTS; i++)
+                        tty_port_destroy(&m68k_soft[i].tport);
                 printk(KERN_ERR "Couldn't register serial driver\n");
                 return -ENOMEM;
         }
diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c
index 3ba4234592bc..d085e3a8ec06 100644
--- a/drivers/tty/serial/8250/8250.c
+++ b/drivers/tty/serial/8250/8250.c
@@ -280,7 +280,17 @@ static const struct serial8250_config uart_config[] = {
                 .fifo_size      = 64,
                 .tx_loadsz      = 64,
                 .fcr            = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
-                .flags          = UART_CAP_FIFO | UART_CAP_AFE | UART_CAP_EFR,
+                .flags          = UART_CAP_FIFO | UART_CAP_AFE | UART_CAP_EFR |
+                                  UART_CAP_SLEEP,
+        },
+        [PORT_XR17V35X] = {
+                .name           = "XR17V35X",
+                .fifo_size      = 256,
+                .tx_loadsz      = 256,
+                .fcr            = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_11 |
+                                  UART_FCR_T_TRIG_11,
+                .flags          = UART_CAP_FIFO | UART_CAP_AFE | UART_CAP_EFR |
+                                  UART_CAP_SLEEP,
         },
         [PORT_LPC3220] = {
                 .name           = "LPC3220",
@@ -455,6 +465,7 @@ static void io_serial_out(struct uart_port *p, int offset, int value)
 }
 
 static int serial8250_default_handle_irq(struct uart_port *port);
+static int exar_handle_irq(struct uart_port *port);
 
 static void set_io_from_upio(struct uart_port *p)
 {
@@ -574,6 +585,19 @@ EXPORT_SYMBOL_GPL(serial8250_clear_and_reinit_fifos);
  */
 static void serial8250_set_sleep(struct uart_8250_port *p, int sleep)
 {
+        /*
+         * Exar UARTs have a SLEEP register that enables or disables
+         * each UART to enter sleep mode separately.  On the XR17V35x the
+         * register is accessible to each UART at the UART_EXAR_SLEEP
+         * offset but the UART channel may only write to the corresponding
+         * bit.
+         */
+        if ((p->port.type == PORT_XR17V35X) ||
+           (p->port.type == PORT_XR17D15X)) {
+                serial_out(p, UART_EXAR_SLEEP, 0xff);
+                return;
+        }
+
         if (p->capabilities & UART_CAP_SLEEP) {
                 if (p->capabilities & UART_CAP_EFR) {
                         serial_out(p, UART_LCR, UART_LCR_CONF_MODE_B);
@@ -882,6 +906,27 @@ static void autoconfig_16550a(struct uart_8250_port *up)
         up->capabilities |= UART_CAP_FIFO;
 
         /*
+         * XR17V35x UARTs have an extra divisor register, DLD
+         * that gets enabled with when DLAB is set which will
+         * cause the device to incorrectly match and assign
+         * port type to PORT_16650.  The EFR for this UART is
+         * found at offset 0x09. Instead check the Deice ID (DVID)
+         * register for a 2, 4 or 8 port UART.
+         */
+        if (up->port.flags & UPF_EXAR_EFR) {
+                status1 = serial_in(up, UART_EXAR_DVID);
+                if (status1 == 0x82 || status1 == 0x84 || status1 == 0x88) {
+                        DEBUG_AUTOCONF("Exar XR17V35x ");
+                        up->port.type = PORT_XR17V35X;
+                        up->capabilities |= UART_CAP_AFE | UART_CAP_EFR |
+                                                UART_CAP_SLEEP;
+
+                        return;
+                }
+
+        }
+
+        /*
          * Check for presence of the EFR when DLAB is set.
          * Only ST16C650V1 UARTs pass this test.
          */
@@ -1013,8 +1058,12 @@ static void autoconfig_16550a(struct uart_8250_port *up)
          * Exar uarts have EFR in a weird location
          */
         if (up->port.flags & UPF_EXAR_EFR) {
+                DEBUG_AUTOCONF("Exar XR17D15x ");
                 up->port.type = PORT_XR17D15X;
-                up->capabilities |= UART_CAP_AFE | UART_CAP_EFR;
+                up->capabilities |= UART_CAP_AFE | UART_CAP_EFR |
+                                    UART_CAP_SLEEP;
+
+                return;
         }
 
         /*
@@ -1516,6 +1565,31 @@ static int serial8250_default_handle_irq(struct uart_port *port)
 }
 
 /*
+ * These Exar UARTs have an extra interrupt indicator that could
+ * fire for a few unimplemented interrupts.  One of which is a
+ * wakeup event when coming out of sleep.  Put this here just
+ * to be on the safe side that these interrupts don't go unhandled.
+ */
+static int exar_handle_irq(struct uart_port *port)
+{
+        unsigned char int0, int1, int2, int3;
+        unsigned int iir = serial_port_in(port, UART_IIR);
+        int ret;
+
+        ret = serial8250_handle_irq(port, iir);
+
+        if ((port->type == PORT_XR17V35X) ||
+           (port->type == PORT_XR17D15X)) {
+                int0 = serial_port_in(port, 0x80);
+                int1 = serial_port_in(port, 0x81);
+                int2 = serial_port_in(port, 0x82);
+                int3 = serial_port_in(port, 0x83);
+        }
+
+        return ret;
+}
+
+/*
  * This is the serial driver's interrupt routine.
  *
  * Arjan thinks the old way was overly complex, so it got simplified.
@@ -2349,16 +2423,14 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
                         serial_port_out(port, UART_EFR, efr);
         }
 
-#ifdef CONFIG_ARCH_OMAP1
         /* Workaround to enable 115200 baud on OMAP1510 internal ports */
-        if (cpu_is_omap1510() && is_omap_port(up)) {
+        if (is_omap1510_8250(up)) {
                 if (baud == 115200) {
                         quot = 1;
                         serial_port_out(port, UART_OMAP_OSC_12M_SEL, 1);
                 } else
                         serial_port_out(port, UART_OMAP_OSC_12M_SEL, 0);
         }
-#endif
 
         /*
          * For NatSemi, switch to bank 2 not bank 1, to avoid resetting EXCR2,
@@ -2439,10 +2511,9 @@ static unsigned int serial8250_port_size(struct uart_8250_port *pt)
 {
         if (pt->port.iotype == UPIO_AU)
                 return 0x1000;
-#ifdef CONFIG_ARCH_OMAP1
-        if (is_omap_port(pt))
+        if (is_omap1_8250(pt))
                 return 0x16 << pt->port.regshift;
-#endif
+
         return 8 << pt->port.regshift;
 }
 
@@ -2617,6 +2688,11 @@ static void serial8250_config_port(struct uart_port *port, int flags)
                 serial8250_release_rsa_resource(up);
         if (port->type == PORT_UNKNOWN)
                 serial8250_release_std_resource(up);
+
+        /* Fixme: probably not the best place for this */
+        if ((port->type == PORT_XR17V35X) ||
+           (port->type == PORT_XR17D15X))
+                port->handle_irq = exar_handle_irq;
 }
 
 static int
@@ -2992,7 +3068,7 @@ void serial8250_resume_port(int line)
  * list is terminated with a zero flags entry, which means we expect
  * all entries to have at least UPF_BOOT_AUTOCONF set.
  */
-static int __devinit serial8250_probe(struct platform_device *dev)
+static int serial8250_probe(struct platform_device *dev)
 {
         struct plat_serial8250_port *p = dev->dev.platform_data;
         struct uart_8250_port uart;
@@ -3038,7 +3114,7 @@ static int __devinit serial8250_probe(struct platform_device *dev)
 /*
  * Remove serial ports registered against a platform device.
  */
-static int __devexit serial8250_remove(struct platform_device *dev)
+static int serial8250_remove(struct platform_device *dev)
 {
         int i;
 
@@ -3081,7 +3157,7 @@ static int serial8250_resume(struct platform_device *dev)
 
 static struct platform_driver serial8250_isa_driver = {
         .probe          = serial8250_probe,
-        .remove         = __devexit_p(serial8250_remove),
+        .remove         = serial8250_remove,
         .suspend        = serial8250_suspend,
         .resume         = serial8250_resume,
         .driver         = {
diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h
index 5a76f9c8d36b..3b4ea84898c2 100644
--- a/drivers/tty/serial/8250/8250.h
+++ b/drivers/tty/serial/8250/8250.h
@@ -106,3 +106,39 @@ static inline int serial8250_pnp_init(void) { return 0; }
 static inline void serial8250_pnp_exit(void) { }
 #endif
 
+#ifdef CONFIG_ARCH_OMAP1
+static inline int is_omap1_8250(struct uart_8250_port *pt)
+{
+        int res;
+
+        switch (pt->port.mapbase) {
+        case OMAP1_UART1_BASE:
+        case OMAP1_UART2_BASE:
+        case OMAP1_UART3_BASE:
+                res = 1;
+                break;
+        default:
+                res = 0;
+                break;
+        }
+
+        return res;
+}
+
+static inline int is_omap1510_8250(struct uart_8250_port *pt)
+{
+        if (!cpu_is_omap1510())
+                return 0;
+
+        return is_omap1_8250(pt);
+}
+#else
+static inline int is_omap1_8250(struct uart_8250_port *pt)
+{
+        return 0;
+}
+static inline int is_omap1510_8250(struct uart_8250_port *pt)
+{
+        return 0;
+}
+#endif
diff --git a/drivers/tty/serial/8250/8250_acorn.c b/drivers/tty/serial/8250/8250_acorn.c
index 857498312a9a..549aa07c0d27 100644
--- a/drivers/tty/serial/8250/8250_acorn.c
+++ b/drivers/tty/serial/8250/8250_acorn.c
@@ -38,7 +38,7 @@ struct serial_card_info {
         void __iomem *vaddr;
 };
 
-static int __devinit
+static int
 serial_card_probe(struct expansion_card *ec, const struct ecard_id *id)
 {
         struct serial_card_info *info;
@@ -80,7 +80,7 @@ serial_card_probe(struct expansion_card *ec, const struct ecard_id *id)
         return 0;
 }
 
-static void __devexit serial_card_remove(struct expansion_card *ec)
+static void serial_card_remove(struct expansion_card *ec)
 {
         struct serial_card_info *info = ecard_get_drvdata(ec);
         int i;
@@ -116,7 +116,7 @@ static const struct ecard_id serial_cids[] = {
 
 static struct ecard_driver serial_card_driver = {
         .probe          = serial_card_probe,
-        .remove         = __devexit_p(serial_card_remove),
+        .remove         = serial_card_remove,
         .id_table       = serial_cids,
         .drv = {
                 .name   = "8250_acorn",
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index c3b2ec0c8c0b..1d0dba2d562d 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -87,7 +87,7 @@ static int dw8250_handle_irq(struct uart_port *p)
         return 0;
 }
 
-static int __devinit dw8250_probe(struct platform_device *pdev)
+static int dw8250_probe(struct platform_device *pdev)
 {
         struct uart_8250_port uart = {};
         struct resource *regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -152,7 +152,7 @@ static int __devinit dw8250_probe(struct platform_device *pdev)
         return 0;
 }
 
-static int __devexit dw8250_remove(struct platform_device *pdev)
+static int dw8250_remove(struct platform_device *pdev)
 {
         struct dw8250_data *data = platform_get_drvdata(pdev);
 
@@ -161,6 +161,29 @@ static int __devexit dw8250_remove(struct platform_device *pdev)
         return 0;
 }
 
+#ifdef CONFIG_PM
+static int dw8250_suspend(struct platform_device *pdev, pm_message_t state)
+{
+        struct dw8250_data *data = platform_get_drvdata(pdev);
+
+        serial8250_suspend_port(data->line);
+
+        return 0;
+}
+
+static int dw8250_resume(struct platform_device *pdev)
+{
+        struct dw8250_data *data = platform_get_drvdata(pdev);
+
+        serial8250_resume_port(data->line);
+
+        return 0;
+}
+#else
+#define dw8250_suspend NULL
+#define dw8250_resume NULL
+#endif /* CONFIG_PM */
+
 static const struct of_device_id dw8250_match[] = {
         { .compatible = "snps,dw-apb-uart" },
         { /* Sentinel */ }
@@ -174,7 +197,9 @@ static struct platform_driver dw8250_platform_driver = {
                 .of_match_table = dw8250_match,
         },
         .probe                  = dw8250_probe,
-        .remove                 = __devexit_p(dw8250_remove),
+        .remove                 = dw8250_remove,
+        .suspend                = dw8250_suspend,
+        .resume                 = dw8250_resume,
 };
 
 module_platform_driver(dw8250_platform_driver);
diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c
index eaafb98debed..f53a7db4350d 100644
--- a/drivers/tty/serial/8250/8250_early.c
+++ b/drivers/tty/serial/8250/8250_early.c
@@ -48,7 +48,7 @@ struct early_serial8250_device {
 
 static struct early_serial8250_device early_device;
 
-static unsigned int __init serial_in(struct uart_port *port, int offset)
+unsigned int __weak __init serial8250_early_in(struct uart_port *port, int offset)
 {
         switch (port->iotype) {
         case UPIO_MEM:
@@ -62,7 +62,7 @@ static unsigned int __init serial_in(struct uart_port *port, int offset)
         }
 }
 
-static void __init serial_out(struct uart_port *port, int offset, int value)
+void __weak __init serial8250_early_out(struct uart_port *port, int offset, int value)
 {
         switch (port->iotype) {
         case UPIO_MEM:
@@ -84,7 +84,7 @@ static void __init wait_for_xmitr(struct uart_port *port)
         unsigned int status;
 
         for (;;) {
-                status = serial_in(port, UART_LSR);
+                status = serial8250_early_in(port, UART_LSR);
                 if ((status & BOTH_EMPTY) == BOTH_EMPTY)
                         return;
                 cpu_relax();
@@ -94,7 +94,7 @@ static void __init wait_for_xmitr(struct uart_port *port)
 static void __init serial_putc(struct uart_port *port, int c)
 {
         wait_for_xmitr(port);
-        serial_out(port, UART_TX, c);
+        serial8250_early_out(port, UART_TX, c);
 }
 
 static void __init early_serial8250_write(struct console *console,
@@ -104,14 +104,14 @@ static void __init early_serial8250_write(struct console *console,
         unsigned int ier;
 
         /* Save the IER and disable interrupts */
-        ier = serial_in(port, UART_IER);
-        serial_out(port, UART_IER, 0);
+        ier = serial8250_early_in(port, UART_IER);
+        serial8250_early_out(port, UART_IER, 0);
 
         uart_console_write(port, s, count, serial_putc);
 
         /* Wait for transmitter to become empty and restore the IER */
         wait_for_xmitr(port);
-        serial_out(port, UART_IER, ier);
+        serial8250_early_out(port, UART_IER, ier);
 }
 
 static unsigned int __init probe_baud(struct uart_port *port)
@@ -119,11 +119,11 @@ static unsigned int __init probe_baud(struct uart_port *port)
         unsigned char lcr, dll, dlm;
         unsigned int quot;
 
-        lcr = serial_in(port, UART_LCR);
-        serial_out(port, UART_LCR, lcr | UART_LCR_DLAB);
-        dll = serial_in(port, UART_DLL);
-        dlm = serial_in(port, UART_DLM);
-        serial_out(port, UART_LCR, lcr);
+        lcr = serial8250_early_in(port, UART_LCR);
+        serial8250_early_out(port, UART_LCR, lcr | UART_LCR_DLAB);
+        dll = serial8250_early_in(port, UART_DLL);
+        dlm = serial8250_early_in(port, UART_DLM);
+        serial8250_early_out(port, UART_LCR, lcr);
 
         quot = (dlm << 8) | dll;
         return (port->uartclk / 16) / quot;
@@ -135,17 +135,17 @@ static void __init init_port(struct early_serial8250_device *device)
         unsigned int divisor;
         unsigned char c;
 
-        serial_out(port, UART_LCR, 0x3);        /* 8n1 */
-        serial_out(port, UART_IER, 0);          /* no interrupt */
-        serial_out(port, UART_FCR, 0);          /* no fifo */
-        serial_out(port, UART_MCR, 0x3);        /* DTR + RTS */
-
-        divisor = port->uartclk / (16 * device->baud);
-        c = serial_in(port, UART_LCR);
-        serial_out(port, UART_LCR, c | UART_LCR_DLAB);
-        serial_out(port, UART_DLL, divisor & 0xff);
-        serial_out(port, UART_DLM, (divisor >> 8) & 0xff);
-        serial_out(port, UART_LCR, c & ~UART_LCR_DLAB);
+        serial8250_early_out(port, UART_LCR, 0x3);      /* 8n1 */
+        serial8250_early_out(port, UART_IER, 0);        /* no interrupt */
+        serial8250_early_out(port, UART_FCR, 0);        /* no fifo */
+        serial8250_early_out(port, UART_MCR, 0x3);      /* DTR + RTS */
+
+        divisor = DIV_ROUND_CLOSEST(port->uartclk, 16 * device->baud);
+        c = serial8250_early_in(port, UART_LCR);
+        serial8250_early_out(port, UART_LCR, c | UART_LCR_DLAB);
+        serial8250_early_out(port, UART_DLL, divisor & 0xff);
+        serial8250_early_out(port, UART_DLM, (divisor >> 8) & 0xff);
+        serial8250_early_out(port, UART_LCR, c & ~UART_LCR_DLAB);
 }
 
 static int __init parse_options(struct early_serial8250_device *device,
diff --git a/drivers/tty/serial/8250/8250_em.c b/drivers/tty/serial/8250/8250_em.c
index 3a0363e7f3a7..916cc19fbbda 100644
--- a/drivers/tty/serial/8250/8250_em.c
+++ b/drivers/tty/serial/8250/8250_em.c
@@ -89,7 +89,7 @@ static void serial8250_em_serial_dl_write(struct uart_8250_port *up, int value)
         serial_out(up, UART_DLM_EM, value >> 8 & 0xff);
 }
 
-static int __devinit serial8250_em_probe(struct platform_device *pdev)
+static int serial8250_em_probe(struct platform_device *pdev)
 {
         struct resource *regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         struct resource *irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
@@ -152,7 +152,7 @@ static int __devinit serial8250_em_probe(struct platform_device *pdev)
         return ret;
 }
 
-static int __devexit serial8250_em_remove(struct platform_device *pdev)
+static int serial8250_em_remove(struct platform_device *pdev)
 {
         struct serial8250_em_priv *priv = platform_get_drvdata(pdev);
 
@@ -163,7 +163,7 @@ static int __devexit serial8250_em_remove(struct platform_device *pdev)
         return 0;
 }
 
-static const struct of_device_id serial8250_em_dt_ids[] __devinitconst = {
+static const struct of_device_id serial8250_em_dt_ids[] = {
         { .compatible = "renesas,em-uart", },
         {},
 };
@@ -176,7 +176,7 @@ static struct platform_driver serial8250_em_platform_driver = {
                 .owner          = THIS_MODULE,
         },
         .probe                  = serial8250_em_probe,
-        .remove                 = __devexit_p(serial8250_em_remove),
+        .remove                 = serial8250_em_remove,
 };
 
 module_platform_driver(serial8250_em_platform_driver);
diff --git a/drivers/tty/serial/8250/8250_hp300.c b/drivers/tty/serial/8250/8250_hp300.c
index f3d0edf46644..5bdaf271d395 100644
--- a/drivers/tty/serial/8250/8250_hp300.c
+++ b/drivers/tty/serial/8250/8250_hp300.c
@@ -36,9 +36,9 @@ static struct hp300_port *hp300_ports;
 
 #ifdef CONFIG_HPDCA
 
-static int __devinit hpdca_init_one(struct dio_dev *d,
+static int hpdca_init_one(struct dio_dev *d,
                                         const struct dio_device_id *ent);
-static void __devexit hpdca_remove_one(struct dio_dev *d);
+static void hpdca_remove_one(struct dio_dev *d);
 
 static struct dio_device_id hpdca_dio_tbl[] = {
         { DIO_ID_DCA0 },
@@ -52,7 +52,7 @@ static struct dio_driver hpdca_driver = {
         .name      = "hpdca",
         .id_table  = hpdca_dio_tbl,
         .probe     = hpdca_init_one,
-        .remove    = __devexit_p(hpdca_remove_one),
+        .remove    = hpdca_remove_one,
 };
 
 #endif
@@ -159,7 +159,7 @@ int __init hp300_setup_serial_console(void)
 #endif /* CONFIG_SERIAL_8250_CONSOLE */
 
 #ifdef CONFIG_HPDCA
-static int __devinit hpdca_init_one(struct dio_dev *d,
+static int hpdca_init_one(struct dio_dev *d,
                                 const struct dio_device_id *ent)
 {
         struct uart_8250_port uart;
@@ -288,7 +288,7 @@ static int __init hp300_8250_init(void)
 }
 
 #ifdef CONFIG_HPDCA
-static void __devexit hpdca_remove_one(struct dio_dev *d)
+static void hpdca_remove_one(struct dio_dev *d)
 {
         int line;
 
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 17b7d26abf41..26b9dc012ed0 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -288,7 +288,7 @@ static int pci_plx9050_init(struct pci_dev *dev)
         return 0;
 }
 
-static void __devexit pci_plx9050_exit(struct pci_dev *dev)
+static void pci_plx9050_exit(struct pci_dev *dev)
 {
         u8 __iomem *p;
 
@@ -313,7 +313,7 @@ static void __devexit pci_plx9050_exit(struct pci_dev *dev)
 #define NI8420_INT_ENABLE_REG   0x38
 #define NI8420_INT_ENABLE_BIT   0x2000
 
-static void __devexit pci_ni8420_exit(struct pci_dev *dev)
+static void pci_ni8420_exit(struct pci_dev *dev)
 {
         void __iomem *p;
         unsigned long base, len;
@@ -345,7 +345,7 @@ static void __devexit pci_ni8420_exit(struct pci_dev *dev)
 
 #define MITE_LCIMR2_CLR_CPU_IE  (1 << 30)
 
-static void __devexit pci_ni8430_exit(struct pci_dev *dev)
+static void pci_ni8430_exit(struct pci_dev *dev)
 {
         void __iomem *p;
         unsigned long base, len;
@@ -422,7 +422,7 @@ static int sbs_init(struct pci_dev *dev)
  * Disables the global interrupt of PMC-OctalPro
  */
 
-static void __devexit sbs_exit(struct pci_dev *dev)
+static void sbs_exit(struct pci_dev *dev)
 {
         u8 __iomem *p;
 
@@ -991,7 +991,7 @@ static int pci_ite887x_init(struct pci_dev *dev)
         return ret;
 }
 
-static void __devexit pci_ite887x_exit(struct pci_dev *dev)
+static void pci_ite887x_exit(struct pci_dev *dev)
 {
         u32 ioport;
         /* the ioport is bit 0-15 in POSIO0R */
@@ -1068,7 +1068,7 @@ ce4100_serial_setup(struct serial_private *priv,
 {
         int ret;
 
-        ret = setup_port(priv, port, 0, 0, board->reg_shift);
+        ret = setup_port(priv, port, idx, 0, board->reg_shift);
         port->port.iotype = UPIO_MEM32;
         port->port.type = PORT_XSCALE;
         port->port.flags = (port->port.flags | UPF_FIXED_PORT | UPF_FIXED_TYPE);
@@ -1165,6 +1165,94 @@ pci_xr17c154_setup(struct serial_private *priv,
 }
 
 static int
+pci_xr17v35x_setup(struct serial_private *priv,
+                  const struct pciserial_board *board,
+                  struct uart_8250_port *port, int idx)
+{
+        u8 __iomem *p;
+
+        p = pci_ioremap_bar(priv->dev, 0);
+        if (p == NULL)
+                return -ENOMEM;
+
+        port->port.flags |= UPF_EXAR_EFR;
+
+        /*
+         * Setup Multipurpose Input/Output pins.
+         */
+        if (idx == 0) {
+                writeb(0x00, p + 0x8f); /*MPIOINT[7:0]*/
+                writeb(0x00, p + 0x90); /*MPIOLVL[7:0]*/
+                writeb(0x00, p + 0x91); /*MPIO3T[7:0]*/
+                writeb(0x00, p + 0x92); /*MPIOINV[7:0]*/
+                writeb(0x00, p + 0x93); /*MPIOSEL[7:0]*/
+                writeb(0x00, p + 0x94); /*MPIOOD[7:0]*/
+                writeb(0x00, p + 0x95); /*MPIOINT[15:8]*/
+                writeb(0x00, p + 0x96); /*MPIOLVL[15:8]*/
+                writeb(0x00, p + 0x97); /*MPIO3T[15:8]*/
+                writeb(0x00, p + 0x98); /*MPIOINV[15:8]*/
+                writeb(0x00, p + 0x99); /*MPIOSEL[15:8]*/
+                writeb(0x00, p + 0x9a); /*MPIOOD[15:8]*/
+        }
+        writeb(0x00, p + UART_EXAR_8XMODE);
+        writeb(UART_FCTR_EXAR_TRGD, p + UART_EXAR_FCTR);
+        writeb(128, p + UART_EXAR_TXTRG);
+        writeb(128, p + UART_EXAR_RXTRG);
+        iounmap(p);
+
+        return pci_default_setup(priv, board, port, idx);
+}
+
+#define PCI_DEVICE_ID_COMMTECH_4222PCI335 0x0004
+#define PCI_DEVICE_ID_COMMTECH_4224PCI335 0x0002
+#define PCI_DEVICE_ID_COMMTECH_2324PCI335 0x000a
+#define PCI_DEVICE_ID_COMMTECH_2328PCI335 0x000b
+
+static int
+pci_fastcom335_setup(struct serial_private *priv,
+                  const struct pciserial_board *board,
+                  struct uart_8250_port *port, int idx)
+{
+        u8 __iomem *p;
+
+        p = pci_ioremap_bar(priv->dev, 0);
+        if (p == NULL)
+                return -ENOMEM;
+
+        port->port.flags |= UPF_EXAR_EFR;
+
+        /*
+         * Setup Multipurpose Input/Output pins.
+         */
+        if (idx == 0) {
+                switch (priv->dev->device) {
+                case PCI_DEVICE_ID_COMMTECH_4222PCI335:
+                case PCI_DEVICE_ID_COMMTECH_4224PCI335:
+                        writeb(0x78, p + 0x90); /* MPIOLVL[7:0] */
+                        writeb(0x00, p + 0x92); /* MPIOINV[7:0] */
+                        writeb(0x00, p + 0x93); /* MPIOSEL[7:0] */
+                        break;
+                case PCI_DEVICE_ID_COMMTECH_2324PCI335:
+                case PCI_DEVICE_ID_COMMTECH_2328PCI335:
+                        writeb(0x00, p + 0x90); /* MPIOLVL[7:0] */
+                        writeb(0xc0, p + 0x92); /* MPIOINV[7:0] */
+                        writeb(0xc0, p + 0x93); /* MPIOSEL[7:0] */
+                        break;
+                }
+                writeb(0x00, p + 0x8f); /* MPIOINT[7:0] */
+                writeb(0x00, p + 0x91); /* MPIO3T[7:0] */
+                writeb(0x00, p + 0x94); /* MPIOOD[7:0] */
+        }
+        writeb(0x00, p + UART_EXAR_8XMODE);
+        writeb(UART_FCTR_EXAR_TRGD, p + UART_EXAR_FCTR);
+        writeb(32, p + UART_EXAR_TXTRG);
+        writeb(32, p + UART_EXAR_RXTRG);
+        iounmap(p);
+
+        return pci_default_setup(priv, board, port, idx);
+}
+
+static int
 pci_wch_ch353_setup(struct serial_private *priv,
                     const struct pciserial_board *board,
                     struct uart_8250_port *port, int idx)
@@ -1213,6 +1301,10 @@ pci_wch_ch353_setup(struct serial_private *priv,
 #define PCI_VENDOR_ID_AGESTAR           0x5372
 #define PCI_DEVICE_ID_AGESTAR_9375      0x6872
 #define PCI_VENDOR_ID_ASIX              0x9710
+#define PCI_DEVICE_ID_COMMTECH_4222PCIE 0x0019
+#define PCI_DEVICE_ID_COMMTECH_4224PCIE 0x0020
+#define PCI_DEVICE_ID_COMMTECH_4228PCIE 0x0021
+
 
 /* Unknown vendors/cards - this should not be in linux/pci_ids.h */
 #define PCI_SUBDEVICE_ID_UNKNOWN_0x1584 0x1584
@@ -1314,7 +1406,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_ite887x_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_ite887x_exit),
+                .exit           = pci_ite887x_exit,
         },
         /*
          * National Instruments
@@ -1326,7 +1418,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_ni8420_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_ni8420_exit),
+                .exit           = pci_ni8420_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_NI,
@@ -1335,7 +1427,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_ni8420_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_ni8420_exit),
+                .exit           = pci_ni8420_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_NI,
@@ -1344,7 +1436,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_ni8420_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_ni8420_exit),
+                .exit           = pci_ni8420_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_NI,
@@ -1353,7 +1445,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_ni8420_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_ni8420_exit),
+                .exit           = pci_ni8420_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_NI,
@@ -1362,7 +1454,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_ni8420_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_ni8420_exit),
+                .exit           = pci_ni8420_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_NI,
@@ -1371,7 +1463,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_ni8420_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_ni8420_exit),
+                .exit           = pci_ni8420_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_NI,
@@ -1380,7 +1472,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_ni8420_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_ni8420_exit),
+                .exit           = pci_ni8420_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_NI,
@@ -1389,7 +1481,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_ni8420_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_ni8420_exit),
+                .exit           = pci_ni8420_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_NI,
@@ -1398,7 +1490,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_ni8420_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_ni8420_exit),
+                .exit           = pci_ni8420_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_NI,
@@ -1407,7 +1499,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_ni8420_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_ni8420_exit),
+                .exit           = pci_ni8420_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_NI,
@@ -1416,7 +1508,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_ni8420_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_ni8420_exit),
+                .exit           = pci_ni8420_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_NI,
@@ -1425,7 +1517,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_ni8420_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_ni8420_exit),
+                .exit           = pci_ni8420_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_NI,
@@ -1434,7 +1526,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_ni8430_init,
                 .setup          = pci_ni8430_setup,
-                .exit           = __devexit_p(pci_ni8430_exit),
+                .exit           = pci_ni8430_exit,
         },
         /*
          * Panacom
@@ -1446,7 +1538,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_plx9050_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_plx9050_exit),
+                .exit           = pci_plx9050_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_PANACOM,
@@ -1455,7 +1547,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .init           = pci_plx9050_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_plx9050_exit),
+                .exit           = pci_plx9050_exit,
         },
         /*
          * PLX
@@ -1474,7 +1566,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_SUBDEVICE_ID_EXSYS_4055,
                 .init           = pci_plx9050_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_plx9050_exit),
+                .exit           = pci_plx9050_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_PLX,
@@ -1483,7 +1575,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_SUBDEVICE_ID_KEYSPAN_SX2,
                 .init           = pci_plx9050_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_plx9050_exit),
+                .exit           = pci_plx9050_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_PLX,
@@ -1492,7 +1584,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_SUBDEVICE_ID_UNKNOWN_0x1584,
                 .init           = pci_plx9050_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_plx9050_exit),
+                .exit           = pci_plx9050_exit,
         },
         {
                 .vendor         = PCI_VENDOR_ID_PLX,
@@ -1501,7 +1593,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_DEVICE_ID_PLX_ROMULUS,
                 .init           = pci_plx9050_init,
                 .setup          = pci_default_setup,
-                .exit           = __devexit_p(pci_plx9050_exit),
+                .exit           = pci_plx9050_exit,
         },
         /*
          * SBS Technologies, Inc., PMC-OCTALPRO 232
@@ -1513,7 +1605,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_SUBDEVICE_ID_OCTPRO232,
                 .init           = sbs_init,
                 .setup          = sbs_setup,
-                .exit           = __devexit_p(sbs_exit),
+                .exit           = sbs_exit,
         },
         /*
          * SBS Technologies, Inc., PMC-OCTALPRO 422
@@ -1525,7 +1617,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_SUBDEVICE_ID_OCTPRO422,
                 .init           = sbs_init,
                 .setup          = sbs_setup,
-                .exit           = __devexit_p(sbs_exit),
+                .exit           = sbs_exit,
         },
         /*
          * SBS Technologies, Inc., P-Octal 232
@@ -1537,7 +1629,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_SUBDEVICE_ID_POCTAL232,
                 .init           = sbs_init,
                 .setup          = sbs_setup,
-                .exit           = __devexit_p(sbs_exit),
+                .exit           = sbs_exit,
         },
         /*
          * SBS Technologies, Inc., P-Octal 422
@@ -1549,7 +1641,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_SUBDEVICE_ID_POCTAL422,
                 .init           = sbs_init,
                 .setup          = sbs_setup,
-                .exit           = __devexit_p(sbs_exit),
+                .exit           = sbs_exit,
         },
         /*
          * SIIG cards - these may be called via parport_serial
@@ -1622,6 +1714,27 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .subdevice      = PCI_ANY_ID,
                 .setup          = pci_xr17c154_setup,
         },
+        {
+                .vendor = PCI_VENDOR_ID_EXAR,
+                .device = PCI_DEVICE_ID_EXAR_XR17V352,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_xr17v35x_setup,
+        },
+        {
+                .vendor = PCI_VENDOR_ID_EXAR,
+                .device = PCI_DEVICE_ID_EXAR_XR17V354,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_xr17v35x_setup,
+        },
+        {
+                .vendor = PCI_VENDOR_ID_EXAR,
+                .device = PCI_DEVICE_ID_EXAR_XR17V358,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_xr17v35x_setup,
+        },
         /*
          * Xircom cards
          */
@@ -1788,6 +1901,59 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
                 .setup          = pci_asix_setup,
         },
         /*
+         * Commtech, Inc. Fastcom adapters
+         *
+         */
+        {
+                .vendor = PCI_VENDOR_ID_COMMTECH,
+                .device = PCI_DEVICE_ID_COMMTECH_4222PCI335,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_fastcom335_setup,
+        },
+        {
+                .vendor = PCI_VENDOR_ID_COMMTECH,
+                .device = PCI_DEVICE_ID_COMMTECH_4224PCI335,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_fastcom335_setup,
+        },
+        {
+                .vendor = PCI_VENDOR_ID_COMMTECH,
+                .device = PCI_DEVICE_ID_COMMTECH_2324PCI335,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_fastcom335_setup,
+        },
+        {
+                .vendor = PCI_VENDOR_ID_COMMTECH,
+                .device = PCI_DEVICE_ID_COMMTECH_2328PCI335,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_fastcom335_setup,
+        },
+        {
+                .vendor = PCI_VENDOR_ID_COMMTECH,
+                .device = PCI_DEVICE_ID_COMMTECH_4222PCIE,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_xr17v35x_setup,
+        },
+        {
+                .vendor = PCI_VENDOR_ID_COMMTECH,
+                .device = PCI_DEVICE_ID_COMMTECH_4224PCIE,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_xr17v35x_setup,
+        },
+        {
+                .vendor = PCI_VENDOR_ID_COMMTECH,
+                .device = PCI_DEVICE_ID_COMMTECH_4228PCIE,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .setup          = pci_xr17v35x_setup,
+        },
+        /*
          * Default "match everything" terminator entry
          */
         {
@@ -1863,6 +2029,10 @@ enum pci_board_num_t {
 
         pbn_b0_4_1152000,
 
+        pbn_b0_2_1152000_200,
+        pbn_b0_4_1152000_200,
+        pbn_b0_8_1152000_200,
+
         pbn_b0_2_1843200,
         pbn_b0_4_1843200,
 
@@ -1962,6 +2132,9 @@ enum pci_board_num_t {
         pbn_exar_XR17C152,
         pbn_exar_XR17C154,
         pbn_exar_XR17C158,
+        pbn_exar_XR17V352,
+        pbn_exar_XR17V354,
+        pbn_exar_XR17V358,
         pbn_exar_ibm_saturn,
         pbn_pasemi_1682M,
         pbn_ni8430_2,
@@ -1987,7 +2160,7 @@ enum pci_board_num_t {
  * see first lines of serial_in() and serial_out() in 8250.c
 */
 
-static struct pciserial_board pci_boards[] __devinitdata = {
+static struct pciserial_board pci_boards[] = {
         [pbn_default] = {
                 .flags          = FL_BASE0,
                 .num_ports      = 1,
@@ -2057,6 +2230,27 @@ static struct pciserial_board pci_boards[] __devinitdata = {
                 .uart_offset    = 8,
         },
 
+        [pbn_b0_2_1152000_200] = {
+                .flags          = FL_BASE0,
+                .num_ports      = 2,
+                .base_baud      = 1152000,
+                .uart_offset    = 0x200,
+        },
+
+        [pbn_b0_4_1152000_200] = {
+                .flags          = FL_BASE0,
+                .num_ports      = 4,
+                .base_baud      = 1152000,
+                .uart_offset    = 0x200,
+        },
+
+        [pbn_b0_8_1152000_200] = {
+                .flags          = FL_BASE0,
+                .num_ports      = 2,
+                .base_baud      = 1152000,
+                .uart_offset    = 0x200,
+        },
+
         [pbn_b0_2_1843200] = {
                 .flags          = FL_BASE0,
                 .num_ports      = 2,
@@ -2580,6 +2774,30 @@ static struct pciserial_board pci_boards[] __devinitdata = {
                 .base_baud      = 921600,
                 .uart_offset    = 0x200,
         },
+        [pbn_exar_XR17V352] = {
+                .flags          = FL_BASE0,
+                .num_ports      = 2,
+                .base_baud      = 7812500,
+                .uart_offset    = 0x400,
+                .reg_shift      = 0,
+                .first_offset   = 0,
+        },
+        [pbn_exar_XR17V354] = {
+                .flags          = FL_BASE0,
+                .num_ports      = 4,
+                .base_baud      = 7812500,
+                .uart_offset    = 0x400,
+                .reg_shift      = 0,
+                .first_offset   = 0,
+        },
+        [pbn_exar_XR17V358] = {
+                .flags          = FL_BASE0,
+                .num_ports      = 8,
+                .base_baud      = 7812500,
+                .uart_offset    = 0x400,
+                .reg_shift      = 0,
+                .first_offset   = 0,
+        },
         [pbn_exar_ibm_saturn] = {
                 .flags          = FL_BASE0,
                 .num_ports      = 1,
@@ -2658,8 +2876,8 @@ static struct pciserial_board pci_boards[] __devinitdata = {
                 .first_offset   = 0x1000,
         },
         [pbn_ce4100_1_115200] = {
-                .flags          = FL_BASE0,
-                .num_ports      = 1,
+                .flags          = FL_BASE_BARS,
+                .num_ports      = 2,
                 .base_baud      = 921600,
                 .reg_shift      = 2,
         },
@@ -2691,7 +2909,7 @@ static const struct pci_device_id blacklist[] = {
  * guess what the configuration might be, based on the pitiful PCI
  * serial specs.  Returns 0 on success, 1 on failure.
  */
-static int __devinit
+static int
 serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board)
 {
         const struct pci_device_id *bldev;
@@ -2917,7 +3135,7 @@ EXPORT_SYMBOL_GPL(pciserial_resume_ports);
  * Probe one serial board.  Unfortunately, there is no rhyme nor reason
  * to the arrangement of serial ports on a PCI card.
  */
-static int __devinit
+static int
 pciserial_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
 {
         struct pci_serial_quirk *quirk;
@@ -2988,7 +3206,7 @@ pciserial_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
         return rc;
 }
 
-static void __devexit pciserial_remove_one(struct pci_dev *dev)
+static void pciserial_remove_one(struct pci_dev *dev)
 {
         struct serial_private *priv = pci_get_drvdata(dev);
 
@@ -3826,6 +4044,21 @@ static struct pci_device_id serial_pci_tbl[] = {
                 PCI_ANY_ID, PCI_ANY_ID,
                 0,
                 0, pbn_exar_XR17C158 },
+        /*
+         * Exar Corp. XR17V35[248] Dual/Quad/Octal PCIe UARTs
+         */
+        {       PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17V352,
+                PCI_ANY_ID, PCI_ANY_ID,
+                0,
+                0, pbn_exar_XR17V352 },
+        {       PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17V354,
+                PCI_ANY_ID, PCI_ANY_ID,
+                0,
+                0, pbn_exar_XR17V354 },
+        {       PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17V358,
+                PCI_ANY_ID, PCI_ANY_ID,
+                0,
+                0, pbn_exar_XR17V358 },
 
         /*
          * Topic TP560 Data/Fax/Voice 56k modem (reported by Evan Clarke)
@@ -4257,6 +4490,38 @@ static struct pci_device_id serial_pci_tbl[] = {
                 0, 0, pbn_b0_bt_2_115200 },
 
         /*
+         * Commtech, Inc. Fastcom adapters
+         */
+        {       PCI_VENDOR_ID_COMMTECH, PCI_DEVICE_ID_COMMTECH_4222PCI335,
+                PCI_ANY_ID, PCI_ANY_ID,
+                0,
+                0, pbn_b0_2_1152000_200 },
+        {       PCI_VENDOR_ID_COMMTECH, PCI_DEVICE_ID_COMMTECH_4224PCI335,
+                PCI_ANY_ID, PCI_ANY_ID,
+                0,
+                0, pbn_b0_4_1152000_200 },
+        {       PCI_VENDOR_ID_COMMTECH, PCI_DEVICE_ID_COMMTECH_2324PCI335,
+                PCI_ANY_ID, PCI_ANY_ID,
+                0,
+                0, pbn_b0_4_1152000_200 },
+        {       PCI_VENDOR_ID_COMMTECH, PCI_DEVICE_ID_COMMTECH_2328PCI335,
+                PCI_ANY_ID, PCI_ANY_ID,
+                0,
+                0, pbn_b0_8_1152000_200 },
+        {       PCI_VENDOR_ID_COMMTECH, PCI_DEVICE_ID_COMMTECH_4222PCIE,
+                PCI_ANY_ID, PCI_ANY_ID,
+                0,
+                0, pbn_exar_XR17V352 },
+        {       PCI_VENDOR_ID_COMMTECH, PCI_DEVICE_ID_COMMTECH_4224PCIE,
+                PCI_ANY_ID, PCI_ANY_ID,
+                0,
+                0, pbn_exar_XR17V354 },
+        {       PCI_VENDOR_ID_COMMTECH, PCI_DEVICE_ID_COMMTECH_4228PCIE,
+                PCI_ANY_ID, PCI_ANY_ID,
+                0,
+                0, pbn_exar_XR17V358 },
+
+        /*
          * These entries match devices with class COMMUNICATION_SERIAL,
          * COMMUNICATION_MODEM or COMMUNICATION_MULTISERIAL
          */
@@ -4323,7 +4588,7 @@ static const struct pci_error_handlers serial8250_err_handler = {
 static struct pci_driver serial_pci_driver = {
         .name           = "serial",
         .probe          = pciserial_init_one,
-        .remove         = __devexit_p(pciserial_remove_one),
+        .remove         = pciserial_remove_one,
 #ifdef CONFIG_PM
         .suspend        = pciserial_suspend_one,
         .resume         = pciserial_resume_one,
@@ -4332,18 +4597,7 @@ static struct pci_driver serial_pci_driver = {
         .err_handler    = &serial8250_err_handler,
 };
 
-static int __init serial8250_pci_init(void)
-{
-        return pci_register_driver(&serial_pci_driver);
-}
-
-static void __exit serial8250_pci_exit(void)
-{
-        pci_unregister_driver(&serial_pci_driver);
-}
-
-module_init(serial8250_pci_init);
-module_exit(serial8250_pci_exit);
+module_pci_driver(serial_pci_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Generic 8250/16x50 PCI serial probe module");
diff --git a/drivers/tty/serial/8250/8250_pnp.c b/drivers/tty/serial/8250/8250_pnp.c
index f8ee25001dd0..35d9ab95c5cb 100644
--- a/drivers/tty/serial/8250/8250_pnp.c
+++ b/drivers/tty/serial/8250/8250_pnp.c
@@ -370,14 +370,14 @@ static const struct pnp_device_id pnp_dev_table[] = {
 
 MODULE_DEVICE_TABLE(pnp, pnp_dev_table);
 
-static char *modem_names[] __devinitdata = {
+static char *modem_names[] = {
         "MODEM", "Modem", "modem", "FAX", "Fax", "fax",
         "56K", "56k", "K56", "33.6", "28.8", "14.4",
         "33,600", "28,800", "14,400", "33.600", "28.800", "14.400",
         "33600", "28800", "14400", "V.90", "V.34", "V.32", NULL
 };
 
-static int __devinit check_name(char *name)
+static int check_name(char *name)
 {
         char **tmp;
 
@@ -388,7 +388,7 @@ static int __devinit check_name(char *name)
         return 0;
 }
 
-static int __devinit check_resources(struct pnp_dev *dev)
+static int check_resources(struct pnp_dev *dev)
 {
         resource_size_t base[] = {0x2f8, 0x3f8, 0x2e8, 0x3e8};
         int i;
@@ -412,7 +412,7 @@ static int __devinit check_resources(struct pnp_dev *dev)
  * PnP modems, alternatively we must hardcode all modems in pnp_devices[]
  * table.
  */
-static int __devinit serial_pnp_guess_board(struct pnp_dev *dev)
+static int serial_pnp_guess_board(struct pnp_dev *dev)
 {
         if (!(check_name(pnp_dev_name(dev)) ||
                 (dev->card && check_name(dev->card->name))))
@@ -424,7 +424,7 @@ static int __devinit serial_pnp_guess_board(struct pnp_dev *dev)
         return -ENODEV;
 }
 
-static int __devinit
+static int
 serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
 {
         struct uart_8250_port uart;
@@ -476,7 +476,7 @@ serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
         return 0;
 }
 
-static void __devexit serial_pnp_remove(struct pnp_dev *dev)
+static void serial_pnp_remove(struct pnp_dev *dev)
 {
         long line = (long)pnp_get_drvdata(dev);
         if (line)
@@ -511,7 +511,7 @@ static int serial_pnp_resume(struct pnp_dev *dev)
 static struct pnp_driver serial_pnp_driver = {
         .name           = "serial",
         .probe          = serial_pnp_probe,
-        .remove         = __devexit_p(serial_pnp_remove),
+        .remove         = serial_pnp_remove,
         .suspend        = serial_pnp_suspend,
         .resume         = serial_pnp_resume,
         .id_table       = pnp_dev_table,
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 2a53be5f010d..59c23d038106 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -93,7 +93,7 @@ config SERIAL_SB1250_DUART_CONSOLE
 
 config SERIAL_ATMEL
         bool "AT91 / AT32 on-chip serial port support"
-        depends on (ARM && ARCH_AT91) || AVR32
+        depends on ARCH_AT91 || AVR32
         select SERIAL_CORE
         help
           This enables the driver for the on-chip UARTs of the Atmel
@@ -198,7 +198,7 @@ config SERIAL_CLPS711X_CONSOLE
 
 config SERIAL_SAMSUNG
         tristate "Samsung SoC serial support"
-        depends on ARM && PLAT_SAMSUNG
+        depends on PLAT_SAMSUNG
         select SERIAL_CORE
         help
           Support for the on-chip UARTs on the Samsung S3C24XX series CPUs,
@@ -208,14 +208,14 @@ config SERIAL_SAMSUNG
 
 config SERIAL_SAMSUNG_UARTS_4
         bool
-        depends on ARM && PLAT_SAMSUNG
+        depends on PLAT_SAMSUNG
         default y if !(CPU_S3C2410 || SERIAL_S3C2412 || CPU_S3C2440 || CPU_S3C2442)
         help
           Internal node for the common case of 4 Samsung compatible UARTs
 
 config SERIAL_SAMSUNG_UARTS
         int
-        depends on ARM && PLAT_SAMSUNG
+        depends on PLAT_SAMSUNG
         default 6 if ARCH_S5P6450
         default 4 if SERIAL_SAMSUNG_UARTS_4 || CPU_S3C2416
         default 3
@@ -249,7 +249,7 @@ config SERIAL_SAMSUNG_CONSOLE
 
 config SERIAL_SIRFSOC
         tristate "SiRF SoC Platform Serial port support"
-        depends on ARM && ARCH_PRIMA2
+        depends on ARCH_PRIMA2
         select SERIAL_CORE
         help
           Support for the on-chip UART on the CSR SiRFprimaII series,
@@ -347,7 +347,7 @@ config SERIAL_ZS_CONSOLE
 
 config SERIAL_21285
         tristate "DC21285 serial port support"
-        depends on ARM && FOOTBRIDGE
+        depends on FOOTBRIDGE
         select SERIAL_CORE
         help
           If you have a machine based on a 21285 (Footbridge) StrongARM(R)/
@@ -371,7 +371,7 @@ config SERIAL_21285_CONSOLE
 
 config SERIAL_MPSC
         bool "Marvell MPSC serial port support"
-        depends on PPC32 && MV64X60
+        depends on MV64X60
         select SERIAL_CORE
         help
           Say Y here if you want to use the Marvell MPSC serial controller.
@@ -408,7 +408,7 @@ config SERIAL_PXA_CONSOLE
 
 config SERIAL_SA1100
         bool "SA1100 serial port support"
-        depends on ARM && ARCH_SA1100
+        depends on ARCH_SA1100
         select SERIAL_CORE
         help
           If you have a machine based on a SA1100/SA1110 StrongARM(R) CPU you
@@ -716,7 +716,7 @@ config SERIAL_SH_SCI_DMA
 
 config SERIAL_PNX8XXX
         bool "Enable PNX8XXX SoCs' UART Support"
-        depends on MIPS && (SOC_PNX8550 || SOC_PNX833X)
+        depends on SOC_PNX8550 || SOC_PNX833X
         select SERIAL_CORE
         help
           If you have a MIPS-based Philips SoC such as PNX8550 or PNX8330
@@ -1013,7 +1013,7 @@ config SERIAL_SGI_IOC3
 
 config SERIAL_MSM
         bool "MSM on-chip serial port support"
-        depends on ARM && ARCH_MSM
+        depends on ARCH_MSM
         select SERIAL_CORE
 
 config SERIAL_MSM_CONSOLE
@@ -1035,7 +1035,7 @@ config SERIAL_MSM_HS
 
 config SERIAL_VT8500
         bool "VIA VT8500 on-chip serial port support"
-        depends on ARM && ARCH_VT8500
+        depends on ARCH_VT8500
         select SERIAL_CORE
 
 config SERIAL_VT8500_CONSOLE
@@ -1045,7 +1045,7 @@ config SERIAL_VT8500_CONSOLE
 
 config SERIAL_NETX
         tristate "NetX serial port support"
-        depends on ARM && ARCH_NETX
+        depends on ARCH_NETX
         select SERIAL_CORE
         help
           If you have a machine based on a Hilscher NetX SoC you
@@ -1376,6 +1376,7 @@ config SERIAL_MXS_AUART_CONSOLE
 
 config SERIAL_XILINX_PS_UART
         tristate "Xilinx PS UART support"
+        depends on OF
         select SERIAL_CORE
         help
           This driver supports the Xilinx PS UART port.
@@ -1423,4 +1424,27 @@ config SERIAL_EFM32_UART_CONSOLE
         depends on SERIAL_EFM32_UART=y
         select SERIAL_CORE_CONSOLE
 
+config SERIAL_ARC
+        tristate "ARC UART driver support"
+        select SERIAL_CORE
+        help
+          Driver for on-chip UART for ARC(Synopsys) for the legacy
+          FPGA Boards (ML50x/ARCAngel4)
+
+config SERIAL_ARC_CONSOLE
+        bool "Console on ARC UART"
+        depends on SERIAL_ARC=y
+        select SERIAL_CORE_CONSOLE
+        help
+          Enable system Console on ARC UART
+
+config SERIAL_ARC_NR_PORTS
+        int "Number of ARC UART ports"
+        depends on SERIAL_ARC
+        range 1 3
+        default "1"
+        help
+          Set this to the number of serial ports you want the driver
+          to support.
+
 endmenu
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index 4f694dafa719..df1b998c436b 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -82,3 +82,4 @@ obj-$(CONFIG_SERIAL_XILINX_PS_UART) += xilinx_uartps.o
 obj-$(CONFIG_SERIAL_SIRFSOC) += sirfsoc_uart.o
 obj-$(CONFIG_SERIAL_AR933X)   += ar933x_uart.o
 obj-$(CONFIG_SERIAL_EFM32_UART) += efm32-uart.o
+obj-$(CONFIG_SERIAL_ARC)        += arc_uart.o
diff --git a/drivers/tty/serial/altera_jtaguart.c b/drivers/tty/serial/altera_jtaguart.c
index 530181e49f6b..872f14ae43d2 100644
--- a/drivers/tty/serial/altera_jtaguart.c
+++ b/drivers/tty/serial/altera_jtaguart.c
@@ -406,7 +406,7 @@ static struct uart_driver altera_jtaguart_driver = {
         .cons           = ALTERA_JTAGUART_CONSOLE,
 };
 
-static int __devinit altera_jtaguart_probe(struct platform_device *pdev)
+static int altera_jtaguart_probe(struct platform_device *pdev)
 {
         struct altera_jtaguart_platform_uart *platp = pdev->dev.platform_data;
         struct uart_port *port;
@@ -453,7 +453,7 @@ static int __devinit altera_jtaguart_probe(struct platform_device *pdev)
         return 0;
 }
 
-static int __devexit altera_jtaguart_remove(struct platform_device *pdev)
+static int altera_jtaguart_remove(struct platform_device *pdev)
 {
         struct uart_port *port;
         int i = pdev->id;
@@ -477,7 +477,7 @@ MODULE_DEVICE_TABLE(of, altera_jtaguart_match);
 
 static struct platform_driver altera_jtaguart_platform_driver = {
         .probe  = altera_jtaguart_probe,
-        .remove = __devexit_p(altera_jtaguart_remove),
+        .remove = altera_jtaguart_remove,
         .driver = {
                 .name           = DRV_NAME,
                 .owner          = THIS_MODULE,
diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c
index 15d80b9fb303..684a0808e1c7 100644
--- a/drivers/tty/serial/altera_uart.c
+++ b/drivers/tty/serial/altera_uart.c
@@ -532,7 +532,7 @@ static int altera_uart_get_of_uartclk(struct platform_device *pdev,
 }
 #endif /* CONFIG_OF */
 
-static int __devinit altera_uart_probe(struct platform_device *pdev)
+static int altera_uart_probe(struct platform_device *pdev)
 {
         struct altera_uart_platform_uart *platp = pdev->dev.platform_data;
         struct uart_port *port;
@@ -598,7 +598,7 @@ static int __devinit altera_uart_probe(struct platform_device *pdev)
         return 0;
 }
 
-static int __devexit altera_uart_remove(struct platform_device *pdev)
+static int altera_uart_remove(struct platform_device *pdev)
 {
         struct uart_port *port = platform_get_drvdata(pdev);
 
@@ -621,7 +621,7 @@ MODULE_DEVICE_TABLE(of, altera_uart_match);
 
 static struct platform_driver altera_uart_platform_driver = {
         .probe  = altera_uart_probe,
-        .remove = __devexit_p(altera_uart_remove),
+        .remove = altera_uart_remove,
         .driver = {
                 .name           = DRV_NAME,
                 .owner          = THIS_MODULE,
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index d7e1edec50b5..7fca4022a8b2 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -56,8 +56,7 @@
 #include <linux/of_device.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/sizes.h>
-
-#include <asm/io.h>
+#include <linux/io.h>
 
 #define UART_NR                 14
 
@@ -1973,7 +1972,8 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
                 goto out;
         }
 
-        uap = kzalloc(sizeof(struct uart_amba_port), GFP_KERNEL);
+        uap = devm_kzalloc(&dev->dev, sizeof(struct uart_amba_port),
+                           GFP_KERNEL);
         if (uap == NULL) {
                 ret = -ENOMEM;
                 goto out;
@@ -1981,16 +1981,17 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
 
         i = pl011_probe_dt_alias(i, &dev->dev);
 
-        base = ioremap(dev->res.start, resource_size(&dev->res));
+        base = devm_ioremap(&dev->dev, dev->res.start,
+                            resource_size(&dev->res));
         if (!base) {
                 ret = -ENOMEM;
-                goto free;
+                goto out;
         }
 
         uap->pinctrl = devm_pinctrl_get(&dev->dev);
         if (IS_ERR(uap->pinctrl)) {
                 ret = PTR_ERR(uap->pinctrl);
-                goto unmap;
+                goto out;
         }
         uap->pins_default = pinctrl_lookup_state(uap->pinctrl,
                                                  PINCTRL_STATE_DEFAULT);
@@ -2002,10 +2003,10 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
         if (IS_ERR(uap->pins_sleep))
                 dev_dbg(&dev->dev, "could not get sleep pinstate\n");
 
-        uap->clk = clk_get(&dev->dev, NULL);
+        uap->clk = devm_clk_get(&dev->dev, NULL);
         if (IS_ERR(uap->clk)) {
                 ret = PTR_ERR(uap->clk);
-                goto unmap;
+                goto out;
         }
 
         uap->vendor = vendor;
@@ -2038,11 +2039,6 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
                 amba_set_drvdata(dev, NULL);
                 amba_ports[i] = NULL;
                 pl011_dma_remove(uap);
-                clk_put(uap->clk);
- unmap:
-                iounmap(base);
- free:
-                kfree(uap);
         }
  out:
         return ret;
@@ -2062,9 +2058,6 @@ static int pl011_remove(struct amba_device *dev)
                         amba_ports[i] = NULL;
 
         pl011_dma_remove(uap);
-        iounmap(uap->port.membase);
-        clk_put(uap->clk);
-        kfree(uap);
         return 0;
 }
 
diff --git a/drivers/tty/serial/apbuart.c b/drivers/tty/serial/apbuart.c
index 7162f70d9260..59ae2b53e765 100644
--- a/drivers/tty/serial/apbuart.c
+++ b/drivers/tty/serial/apbuart.c
@@ -554,7 +554,7 @@ static struct uart_driver grlib_apbuart_driver = {
 /* OF Platform Driver                                                       */
 /* ======================================================================== */
 
-static int __devinit apbuart_probe(struct platform_device *op)
+static int apbuart_probe(struct platform_device *op)
 {
         int i;
         struct uart_port *port = NULL;
diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c
index e4f60e2b87f3..505c490c0b44 100644
--- a/drivers/tty/serial/ar933x_uart.c
+++ b/drivers/tty/serial/ar933x_uart.c
@@ -25,11 +25,19 @@
 #include <linux/io.h>
 #include <linux/irq.h>
 
+#include <asm/div64.h>
+
 #include <asm/mach-ath79/ar933x_uart.h>
 #include <asm/mach-ath79/ar933x_uart_platform.h>
 
 #define DRIVER_NAME "ar933x-uart"
 
+#define AR933X_UART_MAX_SCALE   0xff
+#define AR933X_UART_MAX_STEP    0xffff
+
+#define AR933X_UART_MIN_BAUD    300
+#define AR933X_UART_MAX_BAUD    3000000
+
 #define AR933X_DUMMY_STATUS_RD  0x01
 
 static struct uart_driver ar933x_uart_driver;
@@ -37,6 +45,8 @@ static struct uart_driver ar933x_uart_driver;
 struct ar933x_uart_port {
         struct uart_port        port;
         unsigned int            ier;    /* shadow Interrupt Enable Register */
+        unsigned int            min_baud;
+        unsigned int            max_baud;
 };
 
 static inline unsigned int ar933x_uart_read(struct ar933x_uart_port *up,
@@ -162,6 +172,57 @@ static void ar933x_uart_enable_ms(struct uart_port *port)
 {
 }
 
+/*
+ * baudrate = (clk / (scale + 1)) * (step * (1 / 2^17))
+ */
+static unsigned long ar933x_uart_get_baud(unsigned int clk,
+                                          unsigned int scale,
+                                          unsigned int step)
+{
+        u64 t;
+        u32 div;
+
+        div = (2 << 16) * (scale + 1);
+        t = clk;
+        t *= step;
+        t += (div / 2);
+        do_div(t, div);
+
+        return t;
+}
+
+static void ar933x_uart_get_scale_step(unsigned int clk,
+                                       unsigned int baud,
+                                       unsigned int *scale,
+                                       unsigned int *step)
+{
+        unsigned int tscale;
+        long min_diff;
+
+        *scale = 0;
+        *step = 0;
+
+        min_diff = baud;
+        for (tscale = 0; tscale < AR933X_UART_MAX_SCALE; tscale++) {
+                u64 tstep;
+                int diff;
+
+                tstep = baud * (tscale + 1);
+                tstep *= (2 << 16);
+                do_div(tstep, clk);
+
+                if (tstep > AR933X_UART_MAX_STEP)
+                        break;
+
+                diff = abs(ar933x_uart_get_baud(clk, tscale, tstep) - baud);
+                if (diff < min_diff) {
+                        min_diff = diff;
+                        *scale = tscale;
+                        *step = tstep;
+                }
+        }
+}
+
 static void ar933x_uart_set_termios(struct uart_port *port,
                                     struct ktermios *new,
                                     struct ktermios *old)
@@ -169,7 +230,7 @@ static void ar933x_uart_set_termios(struct uart_port *port,
         struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
         unsigned int cs;
         unsigned long flags;
-        unsigned int baud, scale;
+        unsigned int baud, scale, step;
 
         /* Only CS8 is supported */
         new->c_cflag &= ~CSIZE;
@@ -191,8 +252,8 @@ static void ar933x_uart_set_termios(struct uart_port *port,
         /* Mark/space parity is not supported */
         new->c_cflag &= ~CMSPAR;
 
-        baud = uart_get_baud_rate(port, new, old, 0, port->uartclk / 16);
-        scale = (port->uartclk / (16 * baud)) - 1;
+        baud = uart_get_baud_rate(port, new, old, up->min_baud, up->max_baud);
+        ar933x_uart_get_scale_step(port->uartclk, baud, &scale, &step);
 
         /*
          * Ok, we're now changing the port state. Do it with
@@ -200,6 +261,10 @@ static void ar933x_uart_set_termios(struct uart_port *port,
          */
         spin_lock_irqsave(&up->port.lock, flags);
 
+        /* disable the UART */
+        ar933x_uart_rmw_clear(up, AR933X_UART_CS_REG,
+                      AR933X_UART_CS_IF_MODE_M << AR933X_UART_CS_IF_MODE_S);
+
         /* Update the per-port timeout. */
         uart_update_timeout(port, new->c_cflag, baud);
 
@@ -210,7 +275,7 @@ static void ar933x_uart_set_termios(struct uart_port *port,
                 up->port.ignore_status_mask |= AR933X_DUMMY_STATUS_RD;
 
         ar933x_uart_write(up, AR933X_UART_CLOCK_REG,
-                          scale << AR933X_UART_CLOCK_SCALE_S | 8192);
+                          scale << AR933X_UART_CLOCK_SCALE_S | step);
 
         /* setup configuration register */
         ar933x_uart_rmw(up, AR933X_UART_CS_REG, AR933X_UART_CS_PARITY_M, cs);
@@ -219,6 +284,11 @@ static void ar933x_uart_set_termios(struct uart_port *port,
         ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
                             AR933X_UART_CS_HOST_INT_EN);
 
+        /* reenable the UART */
+        ar933x_uart_rmw(up, AR933X_UART_CS_REG,
+                        AR933X_UART_CS_IF_MODE_M << AR933X_UART_CS_IF_MODE_S,
+                        AR933X_UART_CS_IF_MODE_DCE << AR933X_UART_CS_IF_MODE_S);
+
         spin_unlock_irqrestore(&up->port.lock, flags);
 
         if (tty_termios_baud_rate(new))
@@ -401,6 +471,8 @@ static void ar933x_uart_config_port(struct uart_port *port, int flags)
 static int ar933x_uart_verify_port(struct uart_port *port,
                                    struct serial_struct *ser)
 {
+        struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
+
         if (ser->type != PORT_UNKNOWN &&
             ser->type != PORT_AR933X)
                 return -EINVAL;
@@ -408,7 +480,8 @@ static int ar933x_uart_verify_port(struct uart_port *port,
         if (ser->irq < 0 || ser->irq >= NR_IRQS)
                 return -EINVAL;
 
-        if (ser->baud_base < 28800)
+        if (ser->baud_base < up->min_baud ||
+            ser->baud_base > up->max_baud)
                 return -EINVAL;
 
         return 0;
@@ -554,13 +627,14 @@ static struct uart_driver ar933x_uart_driver = {
         .cons           = AR933X_SERIAL_CONSOLE,
 };
 
-static int __devinit ar933x_uart_probe(struct platform_device *pdev)
+static int ar933x_uart_probe(struct platform_device *pdev)
 {
         struct ar933x_uart_platform_data *pdata;
         struct ar933x_uart_port *up;
         struct uart_port *port;
         struct resource *mem_res;
         struct resource *irq_res;
+        unsigned int baud;
         int id;
         int ret;
 
@@ -611,6 +685,12 @@ static int __devinit ar933x_uart_probe(struct platform_device *pdev)
         port->fifosize = AR933X_UART_FIFO_SIZE;
         port->ops = &ar933x_uart_ops;
 
+        baud = ar933x_uart_get_baud(port->uartclk, AR933X_UART_MAX_SCALE, 1);
+        up->min_baud = max_t(unsigned int, baud, AR933X_UART_MIN_BAUD);
+
+        baud = ar933x_uart_get_baud(port->uartclk, 0, AR933X_UART_MAX_STEP);
+        up->max_baud = min_t(unsigned int, baud, AR933X_UART_MAX_BAUD);
+
         ar933x_uart_add_console_port(up);
 
         ret = uart_add_one_port(&ar933x_uart_driver, &up->port);
@@ -627,7 +707,7 @@ err_free_up:
         return ret;
 }
 
-static int __devexit ar933x_uart_remove(struct platform_device *pdev)
+static int ar933x_uart_remove(struct platform_device *pdev)
 {
         struct ar933x_uart_port *up;
 
@@ -645,7 +725,7 @@ static int __devexit ar933x_uart_remove(struct platform_device *pdev)
 
 static struct platform_driver ar933x_uart_platform_driver = {
         .probe          = ar933x_uart_probe,
-        .remove         = __devexit_p(ar933x_uart_remove),
+        .remove         = ar933x_uart_remove,
         .driver         = {
                 .name           = DRIVER_NAME,
                 .owner          = THIS_MODULE,
diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c
new file mode 100644
index 000000000000..3e0b3fac6a0e
--- /dev/null
+++ b/drivers/tty/serial/arc_uart.c
@@ -0,0 +1,746 @@
+/*
+ * ARC On-Chip(fpga) UART Driver
+ *
+ * Copyright (C) 2010-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * vineetg: July 10th 2012
+ *  -Decoupled the driver from arch/arc
+ *    +Using platform_get_resource() for irq/membase (thx to bfin_uart.c)
+ *    +Using early_platform_xxx() for early console (thx to mach-shmobile/xxx)
+ *
+ * Vineetg: Aug 21st 2010
+ *  -Is uart_tx_stopped() not done in tty write path as it has already been
+ *   taken care of, in serial core
+ *
+ * Vineetg: Aug 18th 2010
+ *  -New Serial Core based ARC UART driver
+ *  -Derived largely from blackfin driver albiet with some major tweaks
+ *
+ * TODO:
+ *  -check if sysreq works
+ */
+
+#if defined(CONFIG_SERIAL_ARC_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
+#include <linux/module.h>
+#include <linux/serial.h>
+#include <linux/console.h>
+#include <linux/sysrq.h>
+#include <linux/platform_device.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial_core.h>
+#include <linux/io.h>
+
+/*************************************
+ * ARC UART Hardware Specs
+ ************************************/
+#define ARC_UART_TX_FIFO_SIZE  1
+
+/*
+ * UART Register set (this is not a Standards Compliant IP)
+ * Also each reg is Word aligned, but only 8 bits wide
+ */
+#define R_ID0   0
+#define R_ID1   4
+#define R_ID2   8
+#define R_ID3   12
+#define R_DATA  16
+#define R_STS   20
+#define R_BAUDL 24
+#define R_BAUDH 28
+
+/* Bits for UART Status Reg (R/W) */
+#define RXIENB  0x04    /* Receive Interrupt Enable */
+#define TXIENB  0x40    /* Transmit Interrupt Enable */
+
+#define RXEMPTY 0x20    /* Receive FIFO Empty: No char receivede */
+#define TXEMPTY 0x80    /* Transmit FIFO Empty, thus char can be written into */
+
+#define RXFULL  0x08    /* Receive FIFO full */
+#define RXFULL1 0x10    /* Receive FIFO has space for 1 char (tot space=4) */
+
+#define RXFERR  0x01    /* Frame Error: Stop Bit not detected */
+#define RXOERR  0x02    /* OverFlow Err: Char recv but RXFULL still set */
+
+/* Uart bit fiddling helpers: lowest level */
+#define RBASE(uart, reg)      (uart->port.membase + reg)
+#define UART_REG_SET(u, r, v) writeb((v), RBASE(u, r))
+#define UART_REG_GET(u, r)    readb(RBASE(u, r))
+
+#define UART_REG_OR(u, r, v)  UART_REG_SET(u, r, UART_REG_GET(u, r) | (v))
+#define UART_REG_CLR(u, r, v) UART_REG_SET(u, r, UART_REG_GET(u, r) & ~(v))
+
+/* Uart bit fiddling helpers: API level */
+#define UART_SET_DATA(uart, val)   UART_REG_SET(uart, R_DATA, val)
+#define UART_GET_DATA(uart)        UART_REG_GET(uart, R_DATA)
+
+#define UART_SET_BAUDH(uart, val)  UART_REG_SET(uart, R_BAUDH, val)
+#define UART_SET_BAUDL(uart, val)  UART_REG_SET(uart, R_BAUDL, val)
+
+#define UART_CLR_STATUS(uart, val) UART_REG_CLR(uart, R_STS, val)
+#define UART_GET_STATUS(uart)      UART_REG_GET(uart, R_STS)
+
+#define UART_ALL_IRQ_DISABLE(uart) UART_REG_CLR(uart, R_STS, RXIENB|TXIENB)
+#define UART_RX_IRQ_DISABLE(uart)  UART_REG_CLR(uart, R_STS, RXIENB)
+#define UART_TX_IRQ_DISABLE(uart)  UART_REG_CLR(uart, R_STS, TXIENB)
+
+#define UART_ALL_IRQ_ENABLE(uart)  UART_REG_OR(uart, R_STS, RXIENB|TXIENB)
+#define UART_RX_IRQ_ENABLE(uart)   UART_REG_OR(uart, R_STS, RXIENB)
+#define UART_TX_IRQ_ENABLE(uart)   UART_REG_OR(uart, R_STS, TXIENB)
+
+#define ARC_SERIAL_DEV_NAME     "ttyARC"
+
+struct arc_uart_port {
+        struct uart_port port;
+        unsigned long baud;
+        int is_emulated;        /* H/w vs. Instruction Set Simulator */
+};
+
+#define to_arc_port(uport)  container_of(uport, struct arc_uart_port, port)
+
+static struct arc_uart_port arc_uart_ports[CONFIG_SERIAL_ARC_NR_PORTS];
+
+#ifdef CONFIG_SERIAL_ARC_CONSOLE
+static struct console arc_console;
+#endif
+
+#define DRIVER_NAME     "arc-uart"
+
+static struct uart_driver arc_uart_driver = {
+        .owner          = THIS_MODULE,
+        .driver_name    = DRIVER_NAME,
+        .dev_name       = ARC_SERIAL_DEV_NAME,
+        .major          = 0,
+        .minor          = 0,
+        .nr             = CONFIG_SERIAL_ARC_NR_PORTS,
+#ifdef CONFIG_SERIAL_ARC_CONSOLE
+        .cons           = &arc_console,
+#endif
+};
+
+static void arc_serial_stop_rx(struct uart_port *port)
+{
+        struct arc_uart_port *uart = to_arc_port(port);
+
+        UART_RX_IRQ_DISABLE(uart);
+}
+
+static void arc_serial_stop_tx(struct uart_port *port)
+{
+        struct arc_uart_port *uart = to_arc_port(port);
+
+        while (!(UART_GET_STATUS(uart) & TXEMPTY))
+                cpu_relax();
+
+        UART_TX_IRQ_DISABLE(uart);
+}
+
+/*
+ * Return TIOCSER_TEMT when transmitter is not busy.
+ */
+static unsigned int arc_serial_tx_empty(struct uart_port *port)
+{
+        struct arc_uart_port *uart = to_arc_port(port);
+        unsigned int stat;
+
+        stat = UART_GET_STATUS(uart);
+        if (stat & TXEMPTY)
+                return TIOCSER_TEMT;
+
+        return 0;
+}
+
+/*
+ * Driver internal routine, used by both tty(serial core) as well as tx-isr
+ *  -Called under spinlock in either cases
+ *  -also tty->stopped / tty->hw_stopped has already been checked
+ *     = by uart_start( ) before calling us
+ *     = tx_ist checks that too before calling
+ */
+static void arc_serial_tx_chars(struct arc_uart_port *uart)
+{
+        struct circ_buf *xmit = &uart->port.state->xmit;
+        int sent = 0;
+        unsigned char ch;
+
+        if (unlikely(uart->port.x_char)) {
+                UART_SET_DATA(uart, uart->port.x_char);
+                uart->port.icount.tx++;
+                uart->port.x_char = 0;
+                sent = 1;
+        } else if (xmit->tail != xmit->head) {  /* TODO: uart_circ_empty */
+                ch = xmit->buf[xmit->tail];
+                xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+                uart->port.icount.tx++;
+                while (!(UART_GET_STATUS(uart) & TXEMPTY))
+                        cpu_relax();
+                UART_SET_DATA(uart, ch);
+                sent = 1;
+        }
+
+        /*
+         * If num chars in xmit buffer are too few, ask tty layer for more.
+         * By Hard ISR to schedule processing in software interrupt part
+         */
+        if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+                uart_write_wakeup(&uart->port);
+
+        if (sent)
+                UART_TX_IRQ_ENABLE(uart);
+}
+
+/*
+ * port is locked and interrupts are disabled
+ * uart_start( ) calls us under the port spinlock irqsave
+ */
+static void arc_serial_start_tx(struct uart_port *port)
+{
+        struct arc_uart_port *uart = to_arc_port(port);
+
+        arc_serial_tx_chars(uart);
+}
+
+static void arc_serial_rx_chars(struct arc_uart_port *uart)
+{
+        struct tty_struct *tty = tty_port_tty_get(&uart->port.state->port);
+        unsigned int status, ch, flg = 0;
+
+        if (!tty)
+                return;
+
+        /*
+         * UART has 4 deep RX-FIFO. Driver's recongnition of this fact
+         * is very subtle. Here's how ...
+         * Upon getting a RX-Intr, such that RX-EMPTY=0, meaning data available,
+         * driver reads the DATA Reg and keeps doing that in a loop, until
+         * RX-EMPTY=1. Multiple chars being avail, with a single Interrupt,
+         * before RX-EMPTY=0, implies some sort of buffering going on in the
+         * controller, which is indeed the Rx-FIFO.
+         */
+        while (!((status = UART_GET_STATUS(uart)) & RXEMPTY)) {
+
+                ch = UART_GET_DATA(uart);
+                uart->port.icount.rx++;
+
+                if (unlikely(status & (RXOERR | RXFERR))) {
+                        if (status & RXOERR) {
+                                uart->port.icount.overrun++;
+                                flg = TTY_OVERRUN;
+                                UART_CLR_STATUS(uart, RXOERR);
+                        }
+
+                        if (status & RXFERR) {
+                                uart->port.icount.frame++;
+                                flg = TTY_FRAME;
+                                UART_CLR_STATUS(uart, RXFERR);
+                        }
+                } else
+                        flg = TTY_NORMAL;
+
+                if (unlikely(uart_handle_sysrq_char(&uart->port, ch)))
+                        goto done;
+
+                uart_insert_char(&uart->port, status, RXOERR, ch, flg);
+
+done:
+                tty_flip_buffer_push(tty);
+        }
+
+        tty_kref_put(tty);
+}
+
+/*
+ * A note on the Interrupt handling state machine of this driver
+ *
+ * kernel printk writes funnel thru the console driver framework and in order
+ * to keep things simple as well as efficient, it writes to UART in polled
+ * mode, in one shot, and exits.
+ *
+ * OTOH, Userland output (via tty layer), uses interrupt based writes as there
+ * can be undeterministic delay between char writes.
+ *
+ * Thus Rx-interrupts are always enabled, while tx-interrupts are by default
+ * disabled.
+ *
+ * When tty has some data to send out, serial core calls driver's start_tx
+ * which
+ *   -checks-if-tty-buffer-has-char-to-send
+ *   -writes-data-to-uart
+ *   -enable-tx-intr
+ *
+ * Once data bits are pushed out, controller raises the Tx-room-avail-Interrupt.
+ * The first thing Tx ISR does is disable further Tx interrupts (as this could
+ * be the last char to send, before settling down into the quiet polled mode).
+ * It then calls the exact routine used by tty layer write to send out any
+ * more char in tty buffer. In case of sending, it re-enables Tx-intr. In case
+ * of no data, it remains disabled.
+ * This is how the transmit state machine is dynamically switched on/off
+ */
+
+static irqreturn_t arc_serial_isr(int irq, void *dev_id)
+{
+        struct arc_uart_port *uart = dev_id;
+        unsigned int status;
+
+        status = UART_GET_STATUS(uart);
+
+        /*
+         * Single IRQ for both Rx (data available) Tx (room available) Interrupt
+         * notifications from the UART Controller.
+         * To demultiplex between the two, we check the relevant bits
+         */
+        if ((status & RXIENB) && !(status & RXEMPTY)) {
+
+                /* already in ISR, no need of xx_irqsave */
+                spin_lock(&uart->port.lock);
+                arc_serial_rx_chars(uart);
+                spin_unlock(&uart->port.lock);
+        }
+
+        if ((status & TXIENB) && (status & TXEMPTY)) {
+
+                /* Unconditionally disable further Tx-Interrupts.
+                 * will be enabled by tx_chars() if needed.
+                 */
+                UART_TX_IRQ_DISABLE(uart);
+
+                spin_lock(&uart->port.lock);
+
+                if (!uart_tx_stopped(&uart->port))
+                        arc_serial_tx_chars(uart);
+
+                spin_unlock(&uart->port.lock);
+        }
+
+        return IRQ_HANDLED;
+}
+
+static unsigned int arc_serial_get_mctrl(struct uart_port *port)
+{
+        /*
+         * Pretend we have a Modem status reg and following bits are
+         *  always set, to satify the serial core state machine
+         *  (DSR) Data Set Ready
+         *  (CTS) Clear To Send
+         *  (CAR) Carrier Detect
+         */
+        return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
+}
+
+static void arc_serial_set_mctrl(struct uart_port *port, unsigned int mctrl)
+{
+        /* MCR not present */
+}
+
+/* Enable Modem Status Interrupts */
+
+static void arc_serial_enable_ms(struct uart_port *port)
+{
+        /* MSR not present */
+}
+
+static void arc_serial_break_ctl(struct uart_port *port, int break_state)
+{
+        /* ARC UART doesn't support sending Break signal */
+}
+
+static int arc_serial_startup(struct uart_port *port)
+{
+        struct arc_uart_port *uart = to_arc_port(port);
+
+        /* Before we hook up the ISR, Disable all UART Interrupts */
+        UART_ALL_IRQ_DISABLE(uart);
+
+        if (request_irq(uart->port.irq, arc_serial_isr, 0, "arc uart rx-tx",
+                        uart)) {
+                dev_warn(uart->port.dev, "Unable to attach ARC UART intr\n");
+                return -EBUSY;
+        }
+
+        UART_RX_IRQ_ENABLE(uart); /* Only Rx IRQ enabled to begin with */
+
+        return 0;
+}
+
+/* This is not really needed */
+static void arc_serial_shutdown(struct uart_port *port)
+{
+        struct arc_uart_port *uart = to_arc_port(port);
+        free_irq(uart->port.irq, uart);
+}
+
+static void
+arc_serial_set_termios(struct uart_port *port, struct ktermios *new,
+                       struct ktermios *old)
+{
+        struct arc_uart_port *uart = to_arc_port(port);
+        unsigned int baud, uartl, uarth, hw_val;
+        unsigned long flags;
+
+        /*
+         * Use the generic handler so that any specially encoded baud rates
+         * such as SPD_xx flags or "%B0" can be handled
+         * Max Baud I suppose will not be more than current 115K * 4
+         * Formula for ARC UART is: hw-val = ((CLK/(BAUD*4)) -1)
+         * spread over two 8-bit registers
+         */
+        baud = uart_get_baud_rate(port, new, old, 0, 460800);
+
+        hw_val = port->uartclk / (uart->baud * 4) - 1;
+        uartl = hw_val & 0xFF;
+        uarth = (hw_val >> 8) & 0xFF;
+
+        /*
+         * UART ISS(Instruction Set simulator) emulation has a subtle bug:
+         * A existing value of Baudh = 0 is used as a indication to startup
+         * it's internal state machine.
+         * Thus if baudh is set to 0, 2 times, it chokes.
+         * This happens with BAUD=115200 and the formaula above
+         * Until that is fixed, when running on ISS, we will set baudh to !0
+         */
+        if (uart->is_emulated)
+                uarth = 1;
+
+        spin_lock_irqsave(&port->lock, flags);
+
+        UART_ALL_IRQ_DISABLE(uart);
+
+        UART_SET_BAUDL(uart, uartl);
+        UART_SET_BAUDH(uart, uarth);
+
+        UART_RX_IRQ_ENABLE(uart);
+
+        /*
+         * UART doesn't support Parity/Hardware Flow Control;
+         * Only supports 8N1 character size
+         */
+        new->c_cflag &= ~(CMSPAR|CRTSCTS|CSIZE);
+        new->c_cflag |= CS8;
+
+        if (old)
+                tty_termios_copy_hw(new, old);
+
+        /* Don't rewrite B0 */
+        if (tty_termios_baud_rate(new))
+                tty_termios_encode_baud_rate(new, baud, baud);
+
+        uart_update_timeout(port, new->c_cflag, baud);
+
+        spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static const char *arc_serial_type(struct uart_port *port)
+{
+        struct arc_uart_port *uart = to_arc_port(port);
+
+        return uart->port.type == PORT_ARC ? DRIVER_NAME : NULL;
+}
+
+static void arc_serial_release_port(struct uart_port *port)
+{
+}
+
+static int arc_serial_request_port(struct uart_port *port)
+{
+        return 0;
+}
+
+/*
+ * Verify the new serial_struct (for TIOCSSERIAL).
+ */
+static int
+arc_serial_verify_port(struct uart_port *port, struct serial_struct *ser)
+{
+        if (port->type != PORT_UNKNOWN && ser->type != PORT_ARC)
+                return -EINVAL;
+
+        return 0;
+}
+
+/*
+ * Configure/autoconfigure the port.
+ */
+static void arc_serial_config_port(struct uart_port *port, int flags)
+{
+        struct arc_uart_port *uart = to_arc_port(port);
+
+        if (flags & UART_CONFIG_TYPE)
+                uart->port.type = PORT_ARC;
+}
+
+#if defined(CONFIG_CONSOLE_POLL) || defined(CONFIG_SERIAL_ARC_CONSOLE)
+
+static void arc_serial_poll_putchar(struct uart_port *port, unsigned char chr)
+{
+        struct arc_uart_port *uart = to_arc_port(port);
+
+        while (!(UART_GET_STATUS(uart) & TXEMPTY))
+                cpu_relax();
+
+        UART_SET_DATA(uart, chr);
+}
+#endif
+
+#ifdef CONFIG_CONSOLE_POLL
+static int arc_serial_poll_getchar(struct uart_port *port)
+{
+        struct arc_uart_port *uart = to_arc_port(port);
+        unsigned char chr;
+
+        while (!(UART_GET_STATUS(uart) & RXEMPTY))
+                cpu_relax();
+
+        chr = UART_GET_DATA(uart);
+        return chr;
+}
+#endif
+
+static struct uart_ops arc_serial_pops = {
+        .tx_empty       = arc_serial_tx_empty,
+        .set_mctrl      = arc_serial_set_mctrl,
+        .get_mctrl      = arc_serial_get_mctrl,
+        .stop_tx        = arc_serial_stop_tx,
+        .start_tx       = arc_serial_start_tx,
+        .stop_rx        = arc_serial_stop_rx,
+        .enable_ms      = arc_serial_enable_ms,
+        .break_ctl      = arc_serial_break_ctl,
+        .startup        = arc_serial_startup,
+        .shutdown       = arc_serial_shutdown,
+        .set_termios    = arc_serial_set_termios,
+        .type           = arc_serial_type,
+        .release_port   = arc_serial_release_port,
+        .request_port   = arc_serial_request_port,
+        .config_port    = arc_serial_config_port,
+        .verify_port    = arc_serial_verify_port,
+#ifdef CONFIG_CONSOLE_POLL
+        .poll_put_char = arc_serial_poll_putchar,
+        .poll_get_char = arc_serial_poll_getchar,
+#endif
+};
+
+static int
+arc_uart_init_one(struct platform_device *pdev, struct arc_uart_port *uart)
+{
+        struct resource *res, *res2;
+        unsigned long *plat_data;
+
+        if (pdev->id < 0 || pdev->id >= CONFIG_SERIAL_ARC_NR_PORTS) {
+                dev_err(&pdev->dev, "Wrong uart platform device id.\n");
+                return -ENOENT;
+        }
+
+        plat_data = ((unsigned long *)(pdev->dev.platform_data));
+        uart->baud = plat_data[0];
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res)
+                return -ENODEV;
+
+        res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+        if (!res2)
+                return -ENODEV;
+
+        uart->port.mapbase = res->start;
+        uart->port.membase = ioremap_nocache(res->start, resource_size(res));
+        if (!uart->port.membase)
+                /* No point of dev_err since UART itself is hosed here */
+                return -ENXIO;
+
+        uart->port.irq = res2->start;
+        uart->port.dev = &pdev->dev;
+        uart->port.iotype = UPIO_MEM;
+        uart->port.flags = UPF_BOOT_AUTOCONF;
+        uart->port.line = pdev->id;
+        uart->port.ops = &arc_serial_pops;
+
+        uart->port.uartclk = plat_data[1];
+        uart->port.fifosize = ARC_UART_TX_FIFO_SIZE;
+
+        /*
+         * uart_insert_char( ) uses it in decideding whether to ignore a
+         * char or not. Explicitly setting it here, removes the subtelty
+         */
+        uart->port.ignore_status_mask = 0;
+
+        /* Real Hardware vs. emulated to work around a bug */
+        uart->is_emulated = !!plat_data[2];
+
+        return 0;
+}
+
+#ifdef CONFIG_SERIAL_ARC_CONSOLE
+
+static int arc_serial_console_setup(struct console *co, char *options)
+{
+        struct uart_port *port;
+        int baud = 115200;
+        int bits = 8;
+        int parity = 'n';
+        int flow = 'n';
+
+        if (co->index < 0 || co->index >= CONFIG_SERIAL_ARC_NR_PORTS)
+                return -ENODEV;
+
+        /*
+         * The uart port backing the console (e.g. ttyARC1) might not have been
+         * init yet. If so, defer the console setup to after the port.
+         */
+        port = &arc_uart_ports[co->index].port;
+        if (!port->membase)
+                return -ENODEV;
+
+        if (options)
+                uart_parse_options(options, &baud, &parity, &bits, &flow);
+
+        /*
+         * Serial core will call port->ops->set_termios( )
+         * which will set the baud reg
+         */
+        return uart_set_options(port, co, baud, parity, bits, flow);
+}
+
+static void arc_serial_console_putchar(struct uart_port *port, int ch)
+{
+        arc_serial_poll_putchar(port, (unsigned char)ch);
+}
+
+/*
+ * Interrupts are disabled on entering
+ */
+static void arc_serial_console_write(struct console *co, const char *s,
+                                     unsigned int count)
+{
+        struct uart_port *port = &arc_uart_ports[co->index].port;
+        unsigned long flags;
+
+        spin_lock_irqsave(&port->lock, flags);
+        uart_console_write(port, s, count, arc_serial_console_putchar);
+        spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static struct console arc_console = {
+        .name   = ARC_SERIAL_DEV_NAME,
+        .write  = arc_serial_console_write,
+        .device = uart_console_device,
+        .setup  = arc_serial_console_setup,
+        .flags  = CON_PRINTBUFFER,
+        .index  = -1,
+        .data   = &arc_uart_driver
+};
+
+static __init void early_serial_write(struct console *con, const char *s,
+                                        unsigned int n)
+{
+        struct uart_port *port = &arc_uart_ports[con->index].port;
+        unsigned int i;
+
+        for (i = 0; i < n; i++, s++) {
+                if (*s == '\n')
+                        arc_serial_poll_putchar(port, '\r');
+                arc_serial_poll_putchar(port, *s);
+        }
+}
+
+static struct __initdata console arc_early_serial_console = {
+        .name = "early_ARCuart",
+        .write = early_serial_write,
+        .flags = CON_PRINTBUFFER | CON_BOOT,
+        .index = -1
+};
+
+static int arc_serial_probe_earlyprintk(struct platform_device *pdev)
+{
+        arc_early_serial_console.index = pdev->id;
+
+        arc_uart_init_one(pdev, &arc_uart_ports[pdev->id]);
+
+        arc_serial_console_setup(&arc_early_serial_console, NULL);
+
+        register_console(&arc_early_serial_console);
+        return 0;
+}
+#else
+static int arc_serial_probe_earlyprintk(struct platform_device *pdev)
+{
+        return -ENODEV;
+}
+#endif  /* CONFIG_SERIAL_ARC_CONSOLE */
+
+static int arc_serial_probe(struct platform_device *pdev)
+{
+        struct arc_uart_port *uart;
+        int rc;
+
+        if (is_early_platform_device(pdev))
+                return arc_serial_probe_earlyprintk(pdev);
+
+        uart = &arc_uart_ports[pdev->id];
+        rc = arc_uart_init_one(pdev, uart);
+        if (rc)
+                return rc;
+
+        return uart_add_one_port(&arc_uart_driver, &uart->port);
+}
+
+static int arc_serial_remove(struct platform_device *pdev)
+{
+        /* This will never be called */
+        return 0;
+}
+
+static struct platform_driver arc_platform_driver = {
+        .probe = arc_serial_probe,
+        .remove = arc_serial_remove,
+        .driver = {
+                .name = DRIVER_NAME,
+                .owner = THIS_MODULE,
+         },
+};
+
+#ifdef CONFIG_SERIAL_ARC_CONSOLE
+/*
+ * Register an early platform driver of "earlyprintk" class.
+ * ARCH platform code installs the driver and probes the early devices
+ * The installation could rely on user specifying earlyprintk=xyx in cmd line
+ * or it could be done independently, for all "earlyprintk" class drivers.
+ * [see arch/arc/plat-arcfpga/platform.c]
+ */
+early_platform_init("earlyprintk", &arc_platform_driver);
+
+#endif  /* CONFIG_SERIAL_ARC_CONSOLE */
+
+static int __init arc_serial_init(void)
+{
+        int ret;
+
+        ret = uart_register_driver(&arc_uart_driver);
+        if (ret)
+                return ret;
+
+        ret = platform_driver_register(&arc_platform_driver);
+        if (ret)
+                uart_unregister_driver(&arc_uart_driver);
+
+        return ret;
+}
+
+static void __exit arc_serial_exit(void)
+{
+        platform_driver_unregister(&arc_platform_driver);
+        uart_unregister_driver(&arc_uart_driver);
+}
+
+module_init(arc_serial_init);
+module_exit(arc_serial_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("plat-arcfpga/uart");
+MODULE_AUTHOR("Vineet Gupta");
+MODULE_DESCRIPTION("ARC(Synopsys) On-Chip(fpga) serial driver");
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index 65f891be12d1..b95886c1198d 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -1424,7 +1424,7 @@ static struct uart_ops atmel_pops = {
 #endif
 };
 
-static void __devinit atmel_of_init_port(struct atmel_uart_port *atmel_port,
+static void atmel_of_init_port(struct atmel_uart_port *atmel_port,
                                          struct device_node *np)
 {
         u32 rs485_delay[2];
@@ -1459,7 +1459,7 @@ static void __devinit atmel_of_init_port(struct atmel_uart_port *atmel_port,
 /*
  * Configure the port from the platform device resource info.
  */
-static void __devinit atmel_init_port(struct atmel_uart_port *atmel_port,
+static void atmel_init_port(struct atmel_uart_port *atmel_port,
                                       struct platform_device *pdev)
 {
         struct uart_port *port = &atmel_port->uart;
@@ -1767,7 +1767,7 @@ static int atmel_serial_resume(struct platform_device *pdev)
 #define atmel_serial_resume NULL
 #endif
 
-static int __devinit atmel_serial_probe(struct platform_device *pdev)
+static int atmel_serial_probe(struct platform_device *pdev)
 {
         struct atmel_uart_port *port;
         struct device_node *np = pdev->dev.of_node;
@@ -1859,7 +1859,7 @@ err:
         return ret;
 }
 
-static int __devexit atmel_serial_remove(struct platform_device *pdev)
+static int atmel_serial_remove(struct platform_device *pdev)
 {
         struct uart_port *port = platform_get_drvdata(pdev);
         struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
@@ -1884,7 +1884,7 @@ static int __devexit atmel_serial_remove(struct platform_device *pdev)
 
 static struct platform_driver atmel_serial_driver = {
         .probe          = atmel_serial_probe,
-        .remove         = __devexit_p(atmel_serial_remove),
+        .remove         = atmel_serial_remove,
         .suspend        = atmel_serial_suspend,
         .resume         = atmel_serial_resume,
         .driver         = {
diff --git a/drivers/tty/serial/bcm63xx_uart.c b/drivers/tty/serial/bcm63xx_uart.c
index c0b68b9cad91..c76a226080f2 100644
--- a/drivers/tty/serial/bcm63xx_uart.c
+++ b/drivers/tty/serial/bcm63xx_uart.c
@@ -801,7 +801,7 @@ static struct uart_driver bcm_uart_driver = {
 /*
  * platform driver probe/remove callback
  */
-static int __devinit bcm_uart_probe(struct platform_device *pdev)
+static int bcm_uart_probe(struct platform_device *pdev)
 {
         struct resource *res_mem, *res_irq;
         struct uart_port *port;
@@ -848,7 +848,7 @@ static int __devinit bcm_uart_probe(struct platform_device *pdev)
         return 0;
 }
 
-static int __devexit bcm_uart_remove(struct platform_device *pdev)
+static int bcm_uart_remove(struct platform_device *pdev)
 {
         struct uart_port *port;
 
@@ -865,7 +865,7 @@ static int __devexit bcm_uart_remove(struct platform_device *pdev)
  */
 static struct platform_driver bcm_uart_platform_driver = {
         .probe  = bcm_uart_probe,
-        .remove = __devexit_p(bcm_uart_remove),
+        .remove = bcm_uart_remove,
         .driver = {
                 .owner = THIS_MODULE,
                 .name  = "bcm63xx_uart",
diff --git a/drivers/tty/serial/bfin_sport_uart.c b/drivers/tty/serial/bfin_sport_uart.c
index 7fbc3a08f10d..f5d117379b60 100644
--- a/drivers/tty/serial/bfin_sport_uart.c
+++ b/drivers/tty/serial/bfin_sport_uart.c
@@ -740,7 +740,7 @@ static struct dev_pm_ops bfin_sport_uart_dev_pm_ops = {
 };
 #endif
 
-static int __devinit sport_uart_probe(struct platform_device *pdev)
+static int sport_uart_probe(struct platform_device *pdev)
 {
         struct resource *res;
         struct sport_uart_port *sport;
@@ -850,7 +850,7 @@ out_error_free_mem:
         return ret;
 }
 
-static int __devexit sport_uart_remove(struct platform_device *pdev)
+static int sport_uart_remove(struct platform_device *pdev)
 {
         struct sport_uart_port *sport = platform_get_drvdata(pdev);
 
@@ -871,7 +871,7 @@ static int __devexit sport_uart_remove(struct platform_device *pdev)
 
 static struct platform_driver sport_uart_driver = {
         .probe          = sport_uart_probe,
-        .remove         = __devexit_p(sport_uart_remove),
+        .remove         = sport_uart_remove,
         .driver         = {
                 .name   = DRV_NAME,
 #ifdef CONFIG_PM
diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c
index 9242d56ba267..e6a008f4939f 100644
--- a/drivers/tty/serial/bfin_uart.c
+++ b/drivers/tty/serial/bfin_uart.c
@@ -477,9 +477,9 @@ static void bfin_serial_dma_rx_chars(struct bfin_serial_port *uart)
 void bfin_serial_rx_dma_timeout(struct bfin_serial_port *uart)
 {
         int x_pos, pos;
+        unsigned long flags;
 
-        dma_disable_irq_nosync(uart->rx_dma_channel);
-        spin_lock_bh(&uart->rx_lock);
+        spin_lock_irqsave(&uart->rx_lock, flags);
 
         /* 2D DMA RX buffer ring is used. Because curr_y_count and
          * curr_x_count can't be read as an atomic operation,
@@ -510,8 +510,7 @@ void bfin_serial_rx_dma_timeout(struct bfin_serial_port *uart)
                 uart->rx_dma_buf.tail = uart->rx_dma_buf.head;
         }
 
-        spin_unlock_bh(&uart->rx_lock);
-        dma_enable_irq(uart->rx_dma_channel);
+        spin_unlock_irqrestore(&uart->rx_lock, flags);
 
         mod_timer(&(uart->rx_dma_timer), jiffies + DMA_RX_FLUSH_JIFFIES);
 }
@@ -800,6 +799,7 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
         unsigned long flags;
         unsigned int baud, quot;
         unsigned int ier, lcr = 0;
+        unsigned long timeout;
 
         switch (termios->c_cflag & CSIZE) {
         case CS8:
@@ -869,6 +869,14 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
 
         UART_SET_ANOMALY_THRESHOLD(uart, USEC_PER_SEC / baud * 15);
 
+        /* Wait till the transfer buffer is empty */
+        timeout = jiffies + msecs_to_jiffies(10);
+        while (UART_GET_GCTL(uart) & UCEN && !(UART_GET_LSR(uart) & TEMT))
+                if (time_after(jiffies, timeout)) {
+                        dev_warn(port->dev, "timeout waiting for TX buffer empty\n");
+                        break;
+                }
+
         /* Disable UART */
         ier = UART_GET_IER(uart);
         UART_PUT_GCTL(uart, UART_GET_GCTL(uart) & ~UCEN);
@@ -1390,7 +1398,7 @@ out_error_free_mem:
         return ret;
 }
 
-static int __devexit bfin_serial_remove(struct platform_device *pdev)
+static int bfin_serial_remove(struct platform_device *pdev)
 {
         struct bfin_serial_port *uart = platform_get_drvdata(pdev);
 
@@ -1410,7 +1418,7 @@ static int __devexit bfin_serial_remove(struct platform_device *pdev)
 
 static struct platform_driver bfin_serial_driver = {
         .probe          = bfin_serial_probe,
-        .remove         = __devexit_p(bfin_serial_remove),
+        .remove         = bfin_serial_remove,
         .suspend        = bfin_serial_suspend,
         .resume         = bfin_serial_resume,
         .driver         = {
diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c
index d0f719fafc84..3fd2526d121e 100644
--- a/drivers/tty/serial/clps711x.c
+++ b/drivers/tty/serial/clps711x.c
@@ -10,15 +10,6 @@
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #if defined(CONFIG_SERIAL_CLPS711X_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
@@ -26,172 +17,169 @@
 #endif
 
 #include <linux/module.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/console.h>
-#include <linux/sysrq.h>
-#include <linux/spinlock.h>
 #include <linux/device.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
+#include <linux/console.h>
 #include <linux/serial_core.h>
 #include <linux/serial.h>
 #include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
 
 #include <mach/hardware.h>
-#include <asm/irq.h>
-
-#define UART_NR         2
-
-#define SERIAL_CLPS711X_MAJOR   204
-#define SERIAL_CLPS711X_MINOR   40
-#define SERIAL_CLPS711X_NR      UART_NR
-
-/*
- * We use the relevant SYSCON register as a base address for these ports.
- */
-#define UBRLCR(port)            ((port)->iobase + UBRLCR1 - SYSCON1)
-#define UARTDR(port)            ((port)->iobase + UARTDR1 - SYSCON1)
-#define SYSFLG(port)            ((port)->iobase + SYSFLG1 - SYSCON1)
-#define SYSCON(port)            ((port)->iobase + SYSCON1 - SYSCON1)
-
-#define TX_IRQ(port)            ((port)->irq)
-#define RX_IRQ(port)            ((port)->irq + 1)
 
-#define UART_ANY_ERR            (UARTDR_FRMERR | UARTDR_PARERR | UARTDR_OVERR)
-
-#define tx_enabled(port)        ((port)->unused[0])
+#define UART_CLPS711X_NAME      "uart-clps711x"
+#define UART_CLPS711X_NR        2
+#define UART_CLPS711X_MAJOR     204
+#define UART_CLPS711X_MINOR     40
+
+#define UBRLCR(port)            ((port)->line ? UBRLCR2 : UBRLCR1)
+#define UARTDR(port)            ((port)->line ? UARTDR2 : UARTDR1)
+#define SYSFLG(port)            ((port)->line ? SYSFLG2 : SYSFLG1)
+#define SYSCON(port)            ((port)->line ? SYSCON2 : SYSCON1)
+#define TX_IRQ(port)            ((port)->line ? IRQ_UTXINT2 : IRQ_UTXINT1)
+#define RX_IRQ(port)            ((port)->line ? IRQ_URXINT2 : IRQ_URXINT1)
+
+struct clps711x_port {
+        struct uart_driver      uart;
+        struct clk              *uart_clk;
+        struct uart_port        port[UART_CLPS711X_NR];
+        int                     tx_enabled[UART_CLPS711X_NR];
+#ifdef CONFIG_SERIAL_CLPS711X_CONSOLE
+        struct console          console;
+#endif
+};
 
-static void clps711xuart_stop_tx(struct uart_port *port)
+static void uart_clps711x_stop_tx(struct uart_port *port)
 {
-        if (tx_enabled(port)) {
+        struct clps711x_port *s = dev_get_drvdata(port->dev);
+
+        if (s->tx_enabled[port->line]) {
                 disable_irq(TX_IRQ(port));
-                tx_enabled(port) = 0;
+                s->tx_enabled[port->line] = 0;
         }
 }
 
-static void clps711xuart_start_tx(struct uart_port *port)
+static void uart_clps711x_start_tx(struct uart_port *port)
 {
-        if (!tx_enabled(port)) {
+        struct clps711x_port *s = dev_get_drvdata(port->dev);
+
+        if (!s->tx_enabled[port->line]) {
                 enable_irq(TX_IRQ(port));
-                tx_enabled(port) = 1;
+                s->tx_enabled[port->line] = 1;
         }
 }
 
-static void clps711xuart_stop_rx(struct uart_port *port)
+static void uart_clps711x_stop_rx(struct uart_port *port)
 {
         disable_irq(RX_IRQ(port));
 }
 
-static void clps711xuart_enable_ms(struct uart_port *port)
+static void uart_clps711x_enable_ms(struct uart_port *port)
 {
+        /* Do nothing */
 }
 
-static irqreturn_t clps711xuart_int_rx(int irq, void *dev_id)
+static irqreturn_t uart_clps711x_int_rx(int irq, void *dev_id)
 {
         struct uart_port *port = dev_id;
-        struct tty_struct *tty = port->state->port.tty;
+        struct tty_struct *tty = tty_port_tty_get(&port->state->port);
         unsigned int status, ch, flg;
 
-        status = clps_readl(SYSFLG(port));
-        while (!(status & SYSFLG_URXFE)) {
-                ch = clps_readl(UARTDR(port));
+        if (!tty)
+                return IRQ_HANDLED;
 
-                port->icount.rx++;
+        for (;;) {
+                status = clps_readl(SYSFLG(port));
+                if (status & SYSFLG_URXFE)
+                        break;
+
+                ch = clps_readw(UARTDR(port));
+                status = ch & (UARTDR_FRMERR | UARTDR_PARERR | UARTDR_OVERR);
+                ch &= 0xff;
 
+                port->icount.rx++;
                 flg = TTY_NORMAL;
 
-                /*
-                 * Note that the error handling code is
-                 * out of the main execution path
-                 */
-                if (unlikely(ch & UART_ANY_ERR)) {
-                        if (ch & UARTDR_PARERR)
+                if (unlikely(status)) {
+                        if (status & UARTDR_PARERR)
                                 port->icount.parity++;
-                        else if (ch & UARTDR_FRMERR)
+                        else if (status & UARTDR_FRMERR)
                                 port->icount.frame++;
-                        if (ch & UARTDR_OVERR)
+                        else if (status & UARTDR_OVERR)
                                 port->icount.overrun++;
 
-                        ch &= port->read_status_mask;
+                        status &= port->read_status_mask;
 
-                        if (ch & UARTDR_PARERR)
+                        if (status & UARTDR_PARERR)
                                 flg = TTY_PARITY;
-                        else if (ch & UARTDR_FRMERR)
+                        else if (status & UARTDR_FRMERR)
                                 flg = TTY_FRAME;
-
-#ifdef SUPPORT_SYSRQ
-                        port->sysrq = 0;
-#endif
+                        else if (status & UARTDR_OVERR)
+                                flg = TTY_OVERRUN;
                 }
 
                 if (uart_handle_sysrq_char(port, ch))
-                        goto ignore_char;
+                        continue;
 
-                /*
-                 * CHECK: does overrun affect the current character?
-                 * ASSUMPTION: it does not.
-                 */
-                uart_insert_char(port, ch, UARTDR_OVERR, ch, flg);
+                if (status & port->ignore_status_mask)
+                        continue;
 
-        ignore_char:
-                status = clps_readl(SYSFLG(port));
+                uart_insert_char(port, status, UARTDR_OVERR, ch, flg);
         }
+
         tty_flip_buffer_push(tty);
+
+        tty_kref_put(tty);
+
         return IRQ_HANDLED;
 }
 
-static irqreturn_t clps711xuart_int_tx(int irq, void *dev_id)
+static irqreturn_t uart_clps711x_int_tx(int irq, void *dev_id)
 {
         struct uart_port *port = dev_id;
+        struct clps711x_port *s = dev_get_drvdata(port->dev);
         struct circ_buf *xmit = &port->state->xmit;
-        int count;
 
         if (port->x_char) {
-                clps_writel(port->x_char, UARTDR(port));
+                clps_writew(port->x_char, UARTDR(port));
                 port->icount.tx++;
                 port->x_char = 0;
                 return IRQ_HANDLED;
         }
 
-        if (uart_circ_empty(xmit) || uart_tx_stopped(port))
-                goto disable_tx_irq;
+        if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
+                disable_irq_nosync(TX_IRQ(port));
+                s->tx_enabled[port->line] = 0;
+                return IRQ_HANDLED;
+        }
 
-        count = port->fifosize >> 1;
-        do {
-                clps_writel(xmit->buf[xmit->tail], UARTDR(port));
+        while (!uart_circ_empty(xmit)) {
+                clps_writew(xmit->buf[xmit->tail], UARTDR(port));
                 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
                 port->icount.tx++;
-                if (uart_circ_empty(xmit))
+                if (clps_readl(SYSFLG(port) & SYSFLG_UTXFF))
                         break;
-        } while (--count > 0);
+        }
 
         if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
                 uart_write_wakeup(port);
 
-        if (uart_circ_empty(xmit)) {
-        disable_tx_irq:
-                disable_irq_nosync(TX_IRQ(port));
-                tx_enabled(port) = 0;
-        }
-
         return IRQ_HANDLED;
 }
 
-static unsigned int clps711xuart_tx_empty(struct uart_port *port)
+static unsigned int uart_clps711x_tx_empty(struct uart_port *port)
 {
-        unsigned int status = clps_readl(SYSFLG(port));
-        return status & SYSFLG_UBUSY ? 0 : TIOCSER_TEMT;
+        return (clps_readl(SYSFLG(port) & SYSFLG_UBUSY)) ? 0 : TIOCSER_TEMT;
 }
 
-static unsigned int clps711xuart_get_mctrl(struct uart_port *port)
+static unsigned int uart_clps711x_get_mctrl(struct uart_port *port)
 {
-        unsigned int port_addr;
-        unsigned int result = 0;
-        unsigned int status;
+        unsigned int status, result = 0;
 
-        port_addr = SYSFLG(port);
-        if (port_addr == SYSFLG1) {
+        if (port->line == 0) {
                 status = clps_readl(SYSFLG1);
                 if (status & SYSFLG1_DCD)
                         result |= TIOCM_CAR;
@@ -199,104 +187,86 @@ static unsigned int clps711xuart_get_mctrl(struct uart_port *port)
                         result |= TIOCM_DSR;
                 if (status & SYSFLG1_CTS)
                         result |= TIOCM_CTS;
-        }
+        } else
+                result = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR;
 
         return result;
 }
 
-static void
-clps711xuart_set_mctrl_null(struct uart_port *port, unsigned int mctrl)
+static void uart_clps711x_set_mctrl(struct uart_port *port, unsigned int mctrl)
 {
+        /* Do nothing */
 }
 
-static void clps711xuart_break_ctl(struct uart_port *port, int break_state)
+static void uart_clps711x_break_ctl(struct uart_port *port, int break_state)
 {
         unsigned long flags;
         unsigned int ubrlcr;
 
         spin_lock_irqsave(&port->lock, flags);
+
         ubrlcr = clps_readl(UBRLCR(port));
-        if (break_state == -1)
+        if (break_state)
                 ubrlcr |= UBRLCR_BREAK;
         else
                 ubrlcr &= ~UBRLCR_BREAK;
         clps_writel(ubrlcr, UBRLCR(port));
+
         spin_unlock_irqrestore(&port->lock, flags);
 }
 
-static int clps711xuart_startup(struct uart_port *port)
+static int uart_clps711x_startup(struct uart_port *port)
 {
-        unsigned int syscon;
-        int retval;
-
-        tx_enabled(port) = 1;
-
-        /*
-         * Allocate the IRQs
-         */
-        retval = request_irq(TX_IRQ(port), clps711xuart_int_tx, 0,
-                             "clps711xuart_tx", port);
-        if (retval)
-                return retval;
-
-        retval = request_irq(RX_IRQ(port), clps711xuart_int_rx, 0,
-                             "clps711xuart_rx", port);
-        if (retval) {
-                free_irq(TX_IRQ(port), port);
-                return retval;
+        struct clps711x_port *s = dev_get_drvdata(port->dev);
+        int ret;
+
+        s->tx_enabled[port->line] = 1;
+        /* Allocate the IRQs */
+        ret = devm_request_irq(port->dev, TX_IRQ(port), uart_clps711x_int_tx,
+                               0, UART_CLPS711X_NAME " TX", port);
+        if (ret)
+                return ret;
+
+        ret = devm_request_irq(port->dev, RX_IRQ(port), uart_clps711x_int_rx,
+                               0, UART_CLPS711X_NAME " RX", port);
+        if (ret) {
+                devm_free_irq(port->dev, TX_IRQ(port), port);
+                return ret;
         }
 
-        /*
-         * enable the port
-         */
-        syscon = clps_readl(SYSCON(port));
-        syscon |= SYSCON_UARTEN;
-        clps_writel(syscon, SYSCON(port));
+        /* Disable break */
+        clps_writel(clps_readl(UBRLCR(port)) & ~UBRLCR_BREAK, UBRLCR(port));
+
+        /* Enable the port */
+        clps_writel(clps_readl(SYSCON(port)) | SYSCON_UARTEN, SYSCON(port));
 
         return 0;
 }
 
-static void clps711xuart_shutdown(struct uart_port *port)
+static void uart_clps711x_shutdown(struct uart_port *port)
 {
-        unsigned int ubrlcr, syscon;
+        /* Free the interrupts */
+        devm_free_irq(port->dev, TX_IRQ(port), port);
+        devm_free_irq(port->dev, RX_IRQ(port), port);
 
-        /*
-         * Free the interrupt
-         */
-        free_irq(TX_IRQ(port), port);   /* TX interrupt */
-        free_irq(RX_IRQ(port), port);   /* RX interrupt */
-
-        /*
-         * disable the port
-         */
-        syscon = clps_readl(SYSCON(port));
-        syscon &= ~SYSCON_UARTEN;
-        clps_writel(syscon, SYSCON(port));
-
-        /*
-         * disable break condition and fifos
-         */
-        ubrlcr = clps_readl(UBRLCR(port));
-        ubrlcr &= ~(UBRLCR_FIFOEN | UBRLCR_BREAK);
-        clps_writel(ubrlcr, UBRLCR(port));
+        /* Disable the port */
+        clps_writel(clps_readl(SYSCON(port)) & ~SYSCON_UARTEN, SYSCON(port));
 }
 
-static void
-clps711xuart_set_termios(struct uart_port *port, struct ktermios *termios,
-                         struct ktermios *old)
+static void uart_clps711x_set_termios(struct uart_port *port,
+                                      struct ktermios *termios,
+                                      struct ktermios *old)
 {
         unsigned int ubrlcr, baud, quot;
         unsigned long flags;
 
-        /*
-         * We don't implement CREAD.
-         */
-        termios->c_cflag |= CREAD;
+        /* Mask termios capabilities we don't support */
+        termios->c_cflag &= ~CMSPAR;
+        termios->c_iflag &= ~(BRKINT | IGNBRK);
 
-        /*
-         * Ask the core to calculate the divisor for us.
-         */
-        baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); 
+        /* Ask the core to calculate the divisor for us */
+        baud = uart_get_baud_rate(port, termios, old, port->uartclk / 4096,
+                                                      port->uartclk / 16);
         quot = uart_get_divisor(port, baud);
 
         switch (termios->c_cflag & CSIZE) {
@@ -309,160 +279,117 @@ clps711xuart_set_termios(struct uart_port *port, struct ktermios *termios,
         case CS7:
                 ubrlcr = UBRLCR_WRDLEN7;
                 break;
-        default: // CS8
+        case CS8:
+        default:
                 ubrlcr = UBRLCR_WRDLEN8;
                 break;
         }
+
         if (termios->c_cflag & CSTOPB)
                 ubrlcr |= UBRLCR_XSTOP;
+
         if (termios->c_cflag & PARENB) {
                 ubrlcr |= UBRLCR_PRTEN;
                 if (!(termios->c_cflag & PARODD))
                         ubrlcr |= UBRLCR_EVENPRT;
         }
-        if (port->fifosize > 1)
-                ubrlcr |= UBRLCR_FIFOEN;
 
-        spin_lock_irqsave(&port->lock, flags);
+        /* Enable FIFO */
+        ubrlcr |= UBRLCR_FIFOEN;
 
-        /*
-         * Update the per-port timeout.
-         */
-        uart_update_timeout(port, termios->c_cflag, baud);
+        spin_lock_irqsave(&port->lock, flags);
 
+        /* Set read status mask */
         port->read_status_mask = UARTDR_OVERR;
         if (termios->c_iflag & INPCK)
                 port->read_status_mask |= UARTDR_PARERR | UARTDR_FRMERR;
 
-        /*
-         * Characters to ignore
-         */
+        /* Set status ignore mask */
         port->ignore_status_mask = 0;
-        if (termios->c_iflag & IGNPAR)
-                port->ignore_status_mask |= UARTDR_FRMERR | UARTDR_PARERR;
-        if (termios->c_iflag & IGNBRK) {
-                /*
-                 * If we're ignoring parity and break indicators,
-                 * ignore overruns to (for real raw support).
-                 */
-                if (termios->c_iflag & IGNPAR)
-                        port->ignore_status_mask |= UARTDR_OVERR;
-        }
+        if (!(termios->c_cflag & CREAD))
+                port->ignore_status_mask |= UARTDR_OVERR | UARTDR_PARERR |
+                                            UARTDR_FRMERR;
 
-        quot -= 1;
+        uart_update_timeout(port, termios->c_cflag, baud);
 
-        clps_writel(ubrlcr | quot, UBRLCR(port));
+        clps_writel(ubrlcr | (quot - 1), UBRLCR(port));
 
         spin_unlock_irqrestore(&port->lock, flags);
 }
 
-static const char *clps711xuart_type(struct uart_port *port)
+static const char *uart_clps711x_type(struct uart_port *port)
 {
-        return port->type == PORT_CLPS711X ? "CLPS711x" : NULL;
+        return (port->type == PORT_CLPS711X) ? "CLPS711X" : NULL;
 }
 
-/*
- * Configure/autoconfigure the port.
- */
-static void clps711xuart_config_port(struct uart_port *port, int flags)
+static void uart_clps711x_config_port(struct uart_port *port, int flags)
 {
         if (flags & UART_CONFIG_TYPE)
                 port->type = PORT_CLPS711X;
 }
 
-static void clps711xuart_release_port(struct uart_port *port)
+static void uart_clps711x_release_port(struct uart_port *port)
 {
+        /* Do nothing */
 }
 
-static int clps711xuart_request_port(struct uart_port *port)
+static int uart_clps711x_request_port(struct uart_port *port)
 {
+        /* Do nothing */
         return 0;
 }
 
-static struct uart_ops clps711x_pops = {
-        .tx_empty       = clps711xuart_tx_empty,
-        .set_mctrl      = clps711xuart_set_mctrl_null,
-        .get_mctrl      = clps711xuart_get_mctrl,
-        .stop_tx        = clps711xuart_stop_tx,
-        .start_tx       = clps711xuart_start_tx,
-        .stop_rx        = clps711xuart_stop_rx,
-        .enable_ms      = clps711xuart_enable_ms,
-        .break_ctl      = clps711xuart_break_ctl,
-        .startup        = clps711xuart_startup,
-        .shutdown       = clps711xuart_shutdown,
-        .set_termios    = clps711xuart_set_termios,
-        .type           = clps711xuart_type,
-        .config_port    = clps711xuart_config_port,
-        .release_port   = clps711xuart_release_port,
-        .request_port   = clps711xuart_request_port,
-};
-
-static struct uart_port clps711x_ports[UART_NR] = {
-        {
-                .iobase         = SYSCON1,
-                .irq            = IRQ_UTXINT1, /* IRQ_URXINT1, IRQ_UMSINT */
-                .uartclk        = 3686400,
-                .fifosize       = 16,
-                .ops            = &clps711x_pops,
-                .line           = 0,
-                .flags          = UPF_BOOT_AUTOCONF,
-        },
-        {
-                .iobase         = SYSCON2,
-                .irq            = IRQ_UTXINT2, /* IRQ_URXINT2 */
-                .uartclk        = 3686400,
-                .fifosize       = 16,
-                .ops            = &clps711x_pops,
-                .line           = 1,
-                .flags          = UPF_BOOT_AUTOCONF,
-        }
+static const struct uart_ops uart_clps711x_ops = {
+        .tx_empty       = uart_clps711x_tx_empty,
+        .set_mctrl      = uart_clps711x_set_mctrl,
+        .get_mctrl      = uart_clps711x_get_mctrl,
+        .stop_tx        = uart_clps711x_stop_tx,
+        .start_tx       = uart_clps711x_start_tx,
+        .stop_rx        = uart_clps711x_stop_rx,
+        .enable_ms      = uart_clps711x_enable_ms,
+        .break_ctl      = uart_clps711x_break_ctl,
+        .startup        = uart_clps711x_startup,
+        .shutdown       = uart_clps711x_shutdown,
+        .set_termios    = uart_clps711x_set_termios,
+        .type           = uart_clps711x_type,
+        .config_port    = uart_clps711x_config_port,
+        .release_port   = uart_clps711x_release_port,
+        .request_port   = uart_clps711x_request_port,
 };
 
 #ifdef CONFIG_SERIAL_CLPS711X_CONSOLE
-static void clps711xuart_console_putchar(struct uart_port *port, int ch)
+static void uart_clps711x_console_putchar(struct uart_port *port, int ch)
 {
         while (clps_readl(SYSFLG(port)) & SYSFLG_UTXFF)
                 barrier();
-        clps_writel(ch, UARTDR(port));
+
+        clps_writew(ch, UARTDR(port));
 }
 
-/*
- *      Print a string to the serial port trying not to disturb
- *      any possible real use of the port...
- *
- *      The console_lock must be held when we get here.
- *
- *      Note that this is called with interrupts already disabled
- */
-static void
-clps711xuart_console_write(struct console *co, const char *s,
-                           unsigned int count)
+static void uart_clps711x_console_write(struct console *co, const char *c,
+                                        unsigned n)
 {
-        struct uart_port *port = clps711x_ports + co->index;
-        unsigned int status, syscon;
+        struct clps711x_port *s = (struct clps711x_port *)co->data;
+        struct uart_port *port = &s->port[co->index];
+        u32 syscon;
 
-        /*
-         *      Ensure that the port is enabled.
-         */
+        /* Ensure that the port is enabled */
         syscon = clps_readl(SYSCON(port));
         clps_writel(syscon | SYSCON_UARTEN, SYSCON(port));
 
-        uart_console_write(port, s, count, clps711xuart_console_putchar);
+        uart_console_write(port, c, n, uart_clps711x_console_putchar);
 
-        /*
-         *      Finally, wait for transmitter to become empty
-         *      and restore the uart state.
-         */
-        do {
-                status = clps_readl(SYSFLG(port));
-        } while (status & SYSFLG_UBUSY);
+        /* Wait for transmitter to become empty */
+        while (clps_readl(SYSFLG(port)) & SYSFLG_UBUSY)
+                barrier();
 
+        /* Restore the uart state */
         clps_writel(syscon, SYSCON(port));
 }
 
-static void __init
-clps711xuart_console_get_options(struct uart_port *port, int *baud,
-                                 int *parity, int *bits)
+static void uart_clps711x_console_get_options(struct uart_port *port,
+                                              int *baud, int *parity,
+                                              int *bits)
 {
         if (clps_readl(SYSCON(port)) & SYSCON_UARTEN) {
                 unsigned int ubrlcr, quot;
@@ -487,92 +414,124 @@ clps711xuart_console_get_options(struct uart_port *port, int *baud,
         }
 }
 
-static int __init clps711xuart_console_setup(struct console *co, char *options)
+static int uart_clps711x_console_setup(struct console *co, char *options)
 {
-        struct uart_port *port;
-        int baud = 38400;
-        int bits = 8;
-        int parity = 'n';
-        int flow = 'n';
-
-        /*
-         * Check whether an invalid uart number has been specified, and
-         * if so, search for the first available port that does have
-         * console support.
-         */
-        port = uart_get_console(clps711x_ports, UART_NR, co);
+        int baud = 38400, bits = 8, parity = 'n', flow = 'n';
+        struct clps711x_port *s = (struct clps711x_port *)co->data;
+        struct uart_port *port = &s->port[(co->index > 0) ? co->index : 0];
 
         if (options)
                 uart_parse_options(options, &baud, &parity, &bits, &flow);
         else
-                clps711xuart_console_get_options(port, &baud, &parity, &bits);
+                uart_clps711x_console_get_options(port, &baud, &parity, &bits);
 
         return uart_set_options(port, co, baud, parity, bits, flow);
 }
+#endif
 
-static struct uart_driver clps711x_reg;
-static struct console clps711x_console = {
-        .name           = "ttyCL",
-        .write          = clps711xuart_console_write,
-        .device         = uart_console_device,
-        .setup          = clps711xuart_console_setup,
-        .flags          = CON_PRINTBUFFER,
-        .index          = -1,
-        .data           = &clps711x_reg,
-};
-
-static int __init clps711xuart_console_init(void)
+static int uart_clps711x_probe(struct platform_device *pdev)
 {
-        register_console(&clps711x_console);
-        return 0;
-}
-console_initcall(clps711xuart_console_init);
+        struct clps711x_port *s;
+        int ret, i;
+
+        s = devm_kzalloc(&pdev->dev, sizeof(struct clps711x_port), GFP_KERNEL);
+        if (!s) {
+                dev_err(&pdev->dev, "Error allocating port structure\n");
+                return -ENOMEM;
+        }
+        platform_set_drvdata(pdev, s);
 
-#define CLPS711X_CONSOLE        &clps711x_console
-#else
-#define CLPS711X_CONSOLE        NULL
+        s->uart_clk = devm_clk_get(&pdev->dev, "uart");
+        if (IS_ERR(s->uart_clk)) {
+                dev_err(&pdev->dev, "Can't get UART clocks\n");
+                ret = PTR_ERR(s->uart_clk);
+                goto err_out;
+        }
+
+        s->uart.owner           = THIS_MODULE;
+        s->uart.dev_name        = "ttyCL";
+        s->uart.major           = UART_CLPS711X_MAJOR;
+        s->uart.minor           = UART_CLPS711X_MINOR;
+        s->uart.nr              = UART_CLPS711X_NR;
+#ifdef CONFIG_SERIAL_CLPS711X_CONSOLE
+        s->uart.cons            = &s->console;
+        s->uart.cons->device    = uart_console_device;
+        s->uart.cons->write     = uart_clps711x_console_write;
+        s->uart.cons->setup     = uart_clps711x_console_setup;
+        s->uart.cons->flags     = CON_PRINTBUFFER;
+        s->uart.cons->index     = -1;
+        s->uart.cons->data      = s;
+        strcpy(s->uart.cons->name, "ttyCL");
 #endif
+        ret = uart_register_driver(&s->uart);
+        if (ret) {
+                dev_err(&pdev->dev, "Registering UART driver failed\n");
+                devm_clk_put(&pdev->dev, s->uart_clk);
+                goto err_out;
+        }
 
-static struct uart_driver clps711x_reg = {
-        .driver_name            = "ttyCL",
-        .dev_name               = "ttyCL",
-        .major                  = SERIAL_CLPS711X_MAJOR,
-        .minor                  = SERIAL_CLPS711X_MINOR,
-        .nr                     = UART_NR,
+        for (i = 0; i < UART_CLPS711X_NR; i++) {
+                s->port[i].line         = i;
+                s->port[i].dev          = &pdev->dev;
+                s->port[i].irq          = TX_IRQ(&s->port[i]);
+                s->port[i].iobase       = SYSCON(&s->port[i]);
+                s->port[i].type         = PORT_CLPS711X;
+                s->port[i].fifosize     = 16;
+                s->port[i].flags        = UPF_SKIP_TEST | UPF_FIXED_TYPE;
+                s->port[i].uartclk      = clk_get_rate(s->uart_clk);
+                s->port[i].ops          = &uart_clps711x_ops;
+                WARN_ON(uart_add_one_port(&s->uart, &s->port[i]));
+        }
 
-        .cons                   = CLPS711X_CONSOLE,
-};
+        return 0;
 
-static int __init clps711xuart_init(void)
-{
-        int ret, i;
+err_out:
+        platform_set_drvdata(pdev, NULL);
 
-        printk(KERN_INFO "Serial: CLPS711x driver\n");
+        return ret;
+}
 
-        ret = uart_register_driver(&clps711x_reg);
-        if (ret)
-                return ret;
+static int uart_clps711x_remove(struct platform_device *pdev)
+{
+        struct clps711x_port *s = platform_get_drvdata(pdev);
+        int i;
 
-        for (i = 0; i < UART_NR; i++)
-                uart_add_one_port(&clps711x_reg, &clps711x_ports[i]);
+        for (i = 0; i < UART_CLPS711X_NR; i++)
+                uart_remove_one_port(&s->uart, &s->port[i]);
+
+        devm_clk_put(&pdev->dev, s->uart_clk);
+        uart_unregister_driver(&s->uart);
+        platform_set_drvdata(pdev, NULL);
 
         return 0;
 }
 
-static void __exit clps711xuart_exit(void)
-{
-        int i;
+static struct platform_driver clps711x_uart_driver = {
+        .driver = {
+                .name   = UART_CLPS711X_NAME,
+                .owner  = THIS_MODULE,
+        },
+        .probe  = uart_clps711x_probe,
+        .remove = uart_clps711x_remove,
+};
+module_platform_driver(clps711x_uart_driver);
 
-        for (i = 0; i < UART_NR; i++)
-                uart_remove_one_port(&clps711x_reg, &clps711x_ports[i]);
+static struct platform_device clps711x_uart_device = {
+        .name   = UART_CLPS711X_NAME,
+};
 
-        uart_unregister_driver(&clps711x_reg);
+static int __init uart_clps711x_init(void)
+{
+        return platform_device_register(&clps711x_uart_device);
 }
+module_init(uart_clps711x_init);
 
-module_init(clps711xuart_init);
-module_exit(clps711xuart_exit);
+static void __exit uart_clps711x_exit(void)
+{
+        platform_device_unregister(&clps711x_uart_device);
+}
+module_exit(uart_clps711x_exit);
 
 MODULE_AUTHOR("Deep Blue Solutions Ltd");
-MODULE_DESCRIPTION("CLPS-711x generic serial driver");
+MODULE_DESCRIPTION("CLPS711X serial driver");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS_CHARDEV(SERIAL_CLPS711X_MAJOR, SERIAL_CLPS711X_MINOR);
diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
index d0dd9194cecc..ad0caf176808 100644
--- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c
@@ -1373,7 +1373,7 @@ static struct uart_driver cpm_reg = {
 
 static int probe_index;
 
-static int __devinit cpm_uart_probe(struct platform_device *ofdev)
+static int cpm_uart_probe(struct platform_device *ofdev)
 {
         int index = probe_index++;
         struct uart_cpm_port *pinfo = &cpm_uart_ports[index];
@@ -1396,7 +1396,7 @@ static int __devinit cpm_uart_probe(struct platform_device *ofdev)
         return uart_add_one_port(&cpm_reg, &pinfo->port);
 }
 
-static int __devexit cpm_uart_remove(struct platform_device *ofdev)
+static int cpm_uart_remove(struct platform_device *ofdev)
 {
         struct uart_cpm_port *pinfo = dev_get_drvdata(&ofdev->dev);
         return uart_remove_one_port(&cpm_reg, &pinfo->port);
diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c
index 615e46470491..a8cbb2670521 100644
--- a/drivers/tty/serial/efm32-uart.c
+++ b/drivers/tty/serial/efm32-uart.c
@@ -690,7 +690,7 @@ static int efm32_uart_probe_dt(struct platform_device *pdev,
 
 }
 
-static int __devinit efm32_uart_probe(struct platform_device *pdev)
+static int efm32_uart_probe(struct platform_device *pdev)
 {
         struct efm32_uart_port *efm_port;
         struct resource *res;
@@ -764,7 +764,7 @@ err_get_base:
         return ret;
 }
 
-static int __devexit efm32_uart_remove(struct platform_device *pdev)
+static int efm32_uart_remove(struct platform_device *pdev)
 {
         struct efm32_uart_port *efm_port = platform_get_drvdata(pdev);
 
@@ -791,7 +791,7 @@ MODULE_DEVICE_TABLE(of, efm32_uart_dt_ids);
 
 static struct platform_driver efm32_uart_driver = {
         .probe = efm32_uart_probe,
-        .remove = __devexit_p(efm32_uart_remove),
+        .remove = efm32_uart_remove,
 
         .driver = {
                 .name = DRIVER_NAME,
diff --git a/drivers/tty/serial/icom.c b/drivers/tty/serial/icom.c
index defc4e3393a3..6197a69adb4d 100644
--- a/drivers/tty/serial/icom.c
+++ b/drivers/tty/serial/icom.c
@@ -175,7 +175,7 @@ static void free_port_memory(struct icom_port *icom_port)
         }
 }
 
-static int __devinit get_port_memory(struct icom_port *icom_port)
+static int get_port_memory(struct icom_port *icom_port)
 {
         int index;
         unsigned long stgAddr;
@@ -1314,7 +1314,7 @@ static struct uart_driver icom_uart_driver = {
         .cons = ICOM_CONSOLE,
 };
 
-static int __devinit icom_init_ports(struct icom_adapter *icom_adapter)
+static int icom_init_ports(struct icom_adapter *icom_adapter)
 {
         u32 subsystem_id = icom_adapter->subsystem_id;
         int i;
@@ -1381,7 +1381,7 @@ static void icom_port_active(struct icom_port *icom_port, struct icom_adapter *i
                             0x8024 + 2 - 2 * (icom_port->port - 2);
         }
 }
-static int __devinit icom_load_ports(struct icom_adapter *icom_adapter)
+static int icom_load_ports(struct icom_adapter *icom_adapter)
 {
         struct icom_port *icom_port;
         int port_num;
@@ -1407,7 +1407,7 @@ static int __devinit icom_load_ports(struct icom_adapter *icom_adapter)
         return 0;
 }
 
-static int __devinit icom_alloc_adapter(struct icom_adapter
+static int icom_alloc_adapter(struct icom_adapter
                                         **icom_adapter_ref)
 {
         int adapter_count = 0;
@@ -1487,7 +1487,7 @@ static void icom_kref_release(struct kref *kref)
         icom_remove_adapter(icom_adapter);
 }
 
-static int __devinit icom_probe(struct pci_dev *dev,
+static int icom_probe(struct pci_dev *dev,
                                 const struct pci_device_id *ent)
 {
         int index;
@@ -1596,7 +1596,7 @@ probe_exit0:
         return retval;
 }
 
-static void __devexit icom_remove(struct pci_dev *dev)
+static void icom_remove(struct pci_dev *dev)
 {
         struct icom_adapter *icom_adapter;
         struct list_head *tmp;
@@ -1617,7 +1617,7 @@ static struct pci_driver icom_pci_driver = {
         .name = ICOM_DRIVER_NAME,
         .id_table = icom_pci_table,
         .probe = icom_probe,
-        .remove = __devexit_p(icom_remove),
+        .remove = icom_remove,
 };
 
 static int __init icom_init(void)
diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c
index 5b9bc19ed134..675d94ab0aff 100644
--- a/drivers/tty/serial/ifx6x60.c
+++ b/drivers/tty/serial/ifx6x60.c
@@ -60,20 +60,27 @@
 #include <linux/pm_runtime.h>
 #include <linux/spi/ifx_modem.h>
 #include <linux/delay.h>
+#include <linux/reboot.h>
 
 #include "ifx6x60.h"
 
 #define IFX_SPI_MORE_MASK               0x10
-#define IFX_SPI_MORE_BIT                12      /* bit position in u16 */
-#define IFX_SPI_CTS_BIT                 13      /* bit position in u16 */
+#define IFX_SPI_MORE_BIT                4       /* bit position in u8 */
+#define IFX_SPI_CTS_BIT                 6       /* bit position in u8 */
 #define IFX_SPI_MODE                    SPI_MODE_1
 #define IFX_SPI_TTY_ID                  0
 #define IFX_SPI_TIMEOUT_SEC             2
 #define IFX_SPI_HEADER_0                (-1)
 #define IFX_SPI_HEADER_F                (-2)
 
+#define PO_POST_DELAY           200
+#define IFX_MDM_RST_PMU 4
+
 /* forward reference */
 static void ifx_spi_handle_srdy(struct ifx_spi_device *ifx_dev);
+static int ifx_modem_reboot_callback(struct notifier_block *nfb,
+                                unsigned long event, void *data);
+static int ifx_modem_power_off(struct ifx_spi_device *ifx_dev);
 
 /* local variables */
 static int spi_bpw = 16;                /* 8, 16 or 32 bit word length */
@@ -81,6 +88,29 @@ static struct tty_driver *tty_drv;
 static struct ifx_spi_device *saved_ifx_dev;
 static struct lock_class_key ifx_spi_key;
 
+static struct notifier_block ifx_modem_reboot_notifier_block = {
+        .notifier_call = ifx_modem_reboot_callback,
+};
+
+static int ifx_modem_power_off(struct ifx_spi_device *ifx_dev)
+{
+        gpio_set_value(IFX_MDM_RST_PMU, 1);
+        msleep(PO_POST_DELAY);
+
+        return 0;
+}
+
+static int ifx_modem_reboot_callback(struct notifier_block *nfb,
+                                 unsigned long event, void *data)
+{
+        if (saved_ifx_dev)
+                ifx_modem_power_off(saved_ifx_dev);
+        else
+                pr_warn("no ifx modem active;\n");
+
+        return NOTIFY_OK;
+}
+
 /* GPIO/GPE settings */
 
 /**
@@ -152,26 +182,67 @@ ifx_spi_power_state_clear(struct ifx_spi_device *ifx_dev, unsigned char val)
 }
 
 /**
- *      swap_buf
+ *      swap_buf_8
  *      @buf: our buffer
  *      @len : number of bytes (not words) in the buffer
  *      @end: end of buffer
  *
  *      Swap the contents of a buffer into big endian format
  */
-static inline void swap_buf(u16 *buf, int len, void *end)
+static inline void swap_buf_8(unsigned char *buf, int len, void *end)
+{
+        /* don't swap buffer if SPI word width is 8 bits */
+        return;
+}
+
+/**
+ *      swap_buf_16
+ *      @buf: our buffer
+ *      @len : number of bytes (not words) in the buffer
+ *      @end: end of buffer
+ *
+ *      Swap the contents of a buffer into big endian format
+ */
+static inline void swap_buf_16(unsigned char *buf, int len, void *end)
 {
         int n;
 
+        u16 *buf_16 = (u16 *)buf;
         len = ((len + 1) >> 1);
-        if ((void *)&buf[len] > end) {
-                pr_err("swap_buf: swap exceeds boundary (%p > %p)!",
-                       &buf[len], end);
+        if ((void *)&buf_16[len] > end) {
+                pr_err("swap_buf_16: swap exceeds boundary (%p > %p)!",
+                       &buf_16[len], end);
+                return;
+        }
+        for (n = 0; n < len; n++) {
+                *buf_16 = cpu_to_be16(*buf_16);
+                buf_16++;
+        }
+}
+
+/**
+ *      swap_buf_32
+ *      @buf: our buffer
+ *      @len : number of bytes (not words) in the buffer
+ *      @end: end of buffer
+ *
+ *      Swap the contents of a buffer into big endian format
+ */
+static inline void swap_buf_32(unsigned char *buf, int len, void *end)
+{
+        int n;
+
+        u32 *buf_32 = (u32 *)buf;
+        len = (len + 3) >> 2;
+
+        if ((void *)&buf_32[len] > end) {
+                pr_err("swap_buf_32: swap exceeds boundary (%p > %p)!\n",
+                       &buf_32[len], end);
                 return;
         }
         for (n = 0; n < len; n++) {
-                *buf = cpu_to_be16(*buf);
-                buf++;
+                *buf_32 = cpu_to_be32(*buf_32);
+                buf_32++;
         }
 }
 
@@ -190,9 +261,7 @@ static void mrdy_assert(struct ifx_spi_device *ifx_dev)
         if (!val) {
                 if (!test_and_set_bit(IFX_SPI_STATE_TIMER_PENDING,
                                       &ifx_dev->flags)) {
-                        ifx_dev->spi_timer.expires =
-                                jiffies + IFX_SPI_TIMEOUT_SEC*HZ;
-                        add_timer(&ifx_dev->spi_timer);
+                        mod_timer(&ifx_dev->spi_timer,jiffies + IFX_SPI_TIMEOUT_SEC*HZ);
 
                 }
         }
@@ -449,7 +518,7 @@ static int ifx_spi_prepare_tx_buffer(struct ifx_spi_device *ifx_dev)
                                         tx_count-IFX_SPI_HEADER_OVERHEAD,
                                         ifx_dev->spi_more);
         /* swap actual data in the buffer */
-        swap_buf((u16 *)(ifx_dev->tx_buffer), tx_count,
+        ifx_dev->swap_buf((ifx_dev->tx_buffer), tx_count,
                 &ifx_dev->tx_buffer[IFX_SPI_TRANSFER_SIZE]);
         return tx_count;
 }
@@ -469,9 +538,17 @@ static int ifx_spi_write(struct tty_struct *tty, const unsigned char *buf,
 {
         struct ifx_spi_device *ifx_dev = tty->driver_data;
         unsigned char *tmp_buf = (unsigned char *)buf;
-        int tx_count = kfifo_in_locked(&ifx_dev->tx_fifo, tmp_buf, count,
-                                   &ifx_dev->fifo_lock);
-        mrdy_assert(ifx_dev);
+        unsigned long flags;
+        bool is_fifo_empty;
+        int tx_count;
+
+        spin_lock_irqsave(&ifx_dev->fifo_lock, flags);
+        is_fifo_empty = kfifo_is_empty(&ifx_dev->tx_fifo);
+        tx_count = kfifo_in(&ifx_dev->tx_fifo, tmp_buf, count);
+        spin_unlock_irqrestore(&ifx_dev->fifo_lock, flags);
+        if (is_fifo_empty)
+                mrdy_assert(ifx_dev);
+
         return tx_count;
 }
 
@@ -530,12 +607,19 @@ static int ifx_port_activate(struct tty_port *port, struct tty_struct *tty)
         /* clear any old data; can't do this in 'close' */
         kfifo_reset(&ifx_dev->tx_fifo);
 
+        /* clear any flag which may be set in port shutdown procedure */
+        clear_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &ifx_dev->flags);
+        clear_bit(IFX_SPI_STATE_IO_READY, &ifx_dev->flags);
+
         /* put port data into this tty */
         tty->driver_data = ifx_dev;
 
         /* allows flip string push from int context */
         tty->low_latency = 1;
 
+        /* set flag to allows data transfer */
+        set_bit(IFX_SPI_STATE_IO_AVAILABLE, &ifx_dev->flags);
+
         return 0;
 }
 
@@ -551,6 +635,7 @@ static void ifx_port_shutdown(struct tty_port *port)
         struct ifx_spi_device *ifx_dev =
                 container_of(port, struct ifx_spi_device, tty_port);
 
+        clear_bit(IFX_SPI_STATE_IO_AVAILABLE, &ifx_dev->flags);
         mrdy_set_low(ifx_dev);
         clear_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags);
         tasklet_kill(&ifx_dev->io_work_tasklet);
@@ -617,7 +702,7 @@ static void ifx_spi_complete(void *ctx)
 
         if (!ifx_dev->spi_msg.status) {
                 /* check header validity, get comm flags */
-                swap_buf((u16 *)ifx_dev->rx_buffer, IFX_SPI_HEADER_OVERHEAD,
+                ifx_dev->swap_buf(ifx_dev->rx_buffer, IFX_SPI_HEADER_OVERHEAD,
                         &ifx_dev->rx_buffer[IFX_SPI_HEADER_OVERHEAD]);
                 decode_result = ifx_spi_decode_spi_header(ifx_dev->rx_buffer,
                                 &length, &more, &cts);
@@ -636,7 +721,8 @@ static void ifx_spi_complete(void *ctx)
 
                 actual_length = min((unsigned int)length,
                                         ifx_dev->spi_msg.actual_length);
-                swap_buf((u16 *)(ifx_dev->rx_buffer + IFX_SPI_HEADER_OVERHEAD),
+                ifx_dev->swap_buf(
+                        (ifx_dev->rx_buffer + IFX_SPI_HEADER_OVERHEAD),
                          actual_length,
                          &ifx_dev->rx_buffer[IFX_SPI_TRANSFER_SIZE]);
                 ifx_spi_insert_flip_string(
@@ -705,7 +791,8 @@ static void ifx_spi_io(unsigned long data)
         int retval;
         struct ifx_spi_device *ifx_dev = (struct ifx_spi_device *) data;
 
-        if (!test_and_set_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &ifx_dev->flags)) {
+        if (!test_and_set_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &ifx_dev->flags) &&
+                test_bit(IFX_SPI_STATE_IO_AVAILABLE, &ifx_dev->flags)) {
                 if (ifx_dev->gpio.unack_srdy_int_nb > 0)
                         ifx_dev->gpio.unack_srdy_int_nb--;
 
@@ -773,6 +860,7 @@ static void ifx_spi_free_port(struct ifx_spi_device *ifx_dev)
 {
         if (ifx_dev->tty_dev)
                 tty_unregister_device(tty_drv, ifx_dev->minor);
+        tty_port_destroy(&ifx_dev->tty_port);
         kfifo_free(&ifx_dev->tx_fifo);
 }
 
@@ -806,10 +894,12 @@ static int ifx_spi_create_port(struct ifx_spi_device *ifx_dev)
                 dev_dbg(&ifx_dev->spi_dev->dev,
                         "%s: registering tty device failed", __func__);
                 ret = PTR_ERR(ifx_dev->tty_dev);
-                goto error_ret;
+                goto error_port;
         }
         return 0;
 
+error_port:
+        tty_port_destroy(pport);
 error_ret:
         ifx_spi_free_port(ifx_dev);
         return ret;
@@ -826,7 +916,7 @@ error_ret:
 static void ifx_spi_handle_srdy(struct ifx_spi_device *ifx_dev)
 {
         if (test_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags)) {
-                del_timer_sync(&ifx_dev->spi_timer);
+                del_timer(&ifx_dev->spi_timer);
                 clear_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags);
         }
 
@@ -1001,6 +1091,14 @@ static int ifx_spi_spi_probe(struct spi_device *spi)
                 return -ENODEV;
         }
 
+        /* init swap_buf function according to word width configuration */
+        if (spi->bits_per_word == 32)
+                ifx_dev->swap_buf = swap_buf_32;
+        else if (spi->bits_per_word == 16)
+                ifx_dev->swap_buf = swap_buf_16;
+        else
+                ifx_dev->swap_buf = swap_buf_8;
+
         /* ensure SPI protocol flags are initialized to enable transfer */
         ifx_dev->spi_more = 0;
         ifx_dev->spi_slave_cts = 0;
@@ -1219,6 +1317,9 @@ static int ifx_spi_spi_remove(struct spi_device *spi)
 
 static void ifx_spi_spi_shutdown(struct spi_device *spi)
 {
+        struct ifx_spi_device *ifx_dev = spi_get_drvdata(spi);
+
+        ifx_modem_power_off(ifx_dev);
 }
 
 /*
@@ -1338,7 +1439,7 @@ static struct spi_driver ifx_spi_driver = {
                 .owner = THIS_MODULE},
         .probe = ifx_spi_spi_probe,
         .shutdown = ifx_spi_spi_shutdown,
-        .remove = __devexit_p(ifx_spi_spi_remove),
+        .remove = ifx_spi_spi_remove,
         .suspend = ifx_spi_spi_suspend,
         .resume = ifx_spi_spi_resume,
         .id_table = ifx_id_table
@@ -1354,7 +1455,9 @@ static void __exit ifx_spi_exit(void)
 {
         /* unregister */
         tty_unregister_driver(tty_drv);
+        put_tty_driver(tty_drv);
         spi_unregister_driver((void *)&ifx_spi_driver);
+        unregister_reboot_notifier(&ifx_modem_reboot_notifier_block);
 }
 
 /**
@@ -1389,16 +1492,31 @@ static int __init ifx_spi_init(void)
         if (result) {
                 pr_err("%s: tty_register_driver failed(%d)",
                         DRVNAME, result);
-                put_tty_driver(tty_drv);
-                return result;
+                goto err_free_tty;
         }
 
         result = spi_register_driver((void *)&ifx_spi_driver);
         if (result) {
                 pr_err("%s: spi_register_driver failed(%d)",
                         DRVNAME, result);
-                tty_unregister_driver(tty_drv);
+                goto err_unreg_tty;
         }
+
+        result = register_reboot_notifier(&ifx_modem_reboot_notifier_block);
+        if (result) {
+                pr_err("%s: register ifx modem reboot notifier failed(%d)",
+                        DRVNAME, result);
+                goto err_unreg_spi;
+        }
+
+        return 0;
+err_unreg_spi:
+        spi_unregister_driver((void *)&ifx_spi_driver);
+err_unreg_tty:
+        tty_unregister_driver(tty_drv);
+err_free_tty:
+        put_tty_driver(tty_drv);
+
         return result;
 }
 
diff --git a/drivers/tty/serial/ifx6x60.h b/drivers/tty/serial/ifx6x60.h
index e8464baf9e75..4fbddc297839 100644
--- a/drivers/tty/serial/ifx6x60.h
+++ b/drivers/tty/serial/ifx6x60.h
@@ -41,6 +41,7 @@
 #define IFX_SPI_STATE_IO_IN_PROGRESS    1
 #define IFX_SPI_STATE_IO_READY          2
 #define IFX_SPI_STATE_TIMER_PENDING     3
+#define IFX_SPI_STATE_IO_AVAILABLE      4
 
 /* flow control bitfields */
 #define IFX_SPI_DCD                     0
@@ -124,6 +125,7 @@ struct ifx_spi_device {
 #define MR_INPROGRESS   1
 #define MR_COMPLETE     2
         wait_queue_head_t mdm_reset_wait;
+        void (*swap_buf)(unsigned char *buf, int len, void *end);
 };
 
 #endif /* _IFX6X60_H */
diff --git a/drivers/tty/serial/ioc3_serial.c b/drivers/tty/serial/ioc3_serial.c
index 5ac52898a0bb..d8f1d1d54471 100644
--- a/drivers/tty/serial/ioc3_serial.c
+++ b/drivers/tty/serial/ioc3_serial.c
@@ -2010,7 +2010,7 @@ static int ioc3uart_remove(struct ioc3_submodule *is,
  * @idd: ioc3 driver data for this card
  */
 
-static int __devinit
+static int
 ioc3uart_probe(struct ioc3_submodule *is, struct ioc3_driver_data *idd)
 {
         struct pci_dev *pdev = idd->pdev;
diff --git a/drivers/tty/serial/jsm/jsm.h b/drivers/tty/serial/jsm/jsm.h
index 529bec6edaf8..844d5e4eb1aa 100644
--- a/drivers/tty/serial/jsm/jsm.h
+++ b/drivers/tty/serial/jsm/jsm.h
@@ -57,9 +57,11 @@ enum {
         DBG_CARR        = 0x10000,
 };
 
-#define jsm_printk(nlevel, klevel, pdev, fmt, args...)  \
-        if ((DBG_##nlevel & jsm_debug))                 \
-        dev_printk(KERN_##klevel, pdev->dev, fmt, ## args)
+#define jsm_dbg(nlevel, pdev, fmt, ...)                         \
+do {                                                            \
+        if (DBG_##nlevel & jsm_debug)                           \
+                dev_dbg(pdev->dev, fmt, ##__VA_ARGS__);         \
+} while (0)
 
 #define MAXLINES        256
 #define MAXPORTS        8
diff --git a/drivers/tty/serial/jsm/jsm_driver.c b/drivers/tty/serial/jsm/jsm_driver.c
index 5ab3c3b595e4..a47d882d6743 100644
--- a/drivers/tty/serial/jsm/jsm_driver.c
+++ b/drivers/tty/serial/jsm/jsm_driver.c
@@ -64,7 +64,7 @@ int jsm_debug;
 module_param(jsm_debug, int, 0);
 MODULE_PARM_DESC(jsm_debug, "Driver debugging level");
 
-static int __devinit jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
+static int jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
         int rc = 0;
         struct jsm_board *brd;
@@ -107,8 +107,7 @@ static int __devinit jsm_probe_one(struct pci_dev *pdev, const struct pci_device
 
         brd->irq = pdev->irq;
 
-        jsm_printk(INIT, INFO, &brd->pci_dev,
-                "jsm_found_board - NEO adapter\n");
+        jsm_dbg(INIT, &brd->pci_dev, "jsm_found_board - NEO adapter\n");
 
         /* get the PCI Base Address Registers */
         brd->membase    = pci_resource_start(pdev, 0);
@@ -179,7 +178,7 @@ static int __devinit jsm_probe_one(struct pci_dev *pdev, const struct pci_device
         return rc;
 }
 
-static void __devexit jsm_remove_one(struct pci_dev *pdev)
+static void jsm_remove_one(struct pci_dev *pdev)
 {
         struct jsm_board *brd = pci_get_drvdata(pdev);
         int i = 0;
@@ -218,7 +217,7 @@ static struct pci_driver jsm_driver = {
         .name           = "jsm",
         .id_table       = jsm_pci_tbl,
         .probe          = jsm_probe_one,
-        .remove         = __devexit_p(jsm_remove_one),
+        .remove         = jsm_remove_one,
         .err_handler    = &jsm_err_handler,
 };
 
diff --git a/drivers/tty/serial/jsm/jsm_neo.c b/drivers/tty/serial/jsm/jsm_neo.c
index 81dfafa11b0b..dfaf48826417 100644
--- a/drivers/tty/serial/jsm/jsm_neo.c
+++ b/drivers/tty/serial/jsm/jsm_neo.c
@@ -52,7 +52,7 @@ static void neo_set_cts_flow_control(struct jsm_channel *ch)
         ier = readb(&ch->ch_neo_uart->ier);
         efr = readb(&ch->ch_neo_uart->efr);
 
-        jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting CTSFLOW\n");
+        jsm_dbg(PARAM, &ch->ch_bd->pci_dev, "Setting CTSFLOW\n");
 
         /* Turn on auto CTS flow control */
         ier |= (UART_17158_IER_CTSDSR);
@@ -83,7 +83,7 @@ static void neo_set_rts_flow_control(struct jsm_channel *ch)
         ier = readb(&ch->ch_neo_uart->ier);
         efr = readb(&ch->ch_neo_uart->efr);
 
-        jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting RTSFLOW\n");
+        jsm_dbg(PARAM, &ch->ch_bd->pci_dev, "Setting RTSFLOW\n");
 
         /* Turn on auto RTS flow control */
         ier |= (UART_17158_IER_RTSDTR);
@@ -123,7 +123,7 @@ static void neo_set_ixon_flow_control(struct jsm_channel *ch)
         ier = readb(&ch->ch_neo_uart->ier);
         efr = readb(&ch->ch_neo_uart->efr);
 
-        jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting IXON FLOW\n");
+        jsm_dbg(PARAM, &ch->ch_bd->pci_dev, "Setting IXON FLOW\n");
 
         /* Turn off auto CTS flow control */
         ier &= ~(UART_17158_IER_CTSDSR);
@@ -160,7 +160,7 @@ static void neo_set_ixoff_flow_control(struct jsm_channel *ch)
         ier = readb(&ch->ch_neo_uart->ier);
         efr = readb(&ch->ch_neo_uart->efr);
 
-        jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting IXOFF FLOW\n");
+        jsm_dbg(PARAM, &ch->ch_bd->pci_dev, "Setting IXOFF FLOW\n");
 
         /* Turn off auto RTS flow control */
         ier &= ~(UART_17158_IER_RTSDTR);
@@ -198,7 +198,7 @@ static void neo_set_no_input_flow_control(struct jsm_channel *ch)
         ier = readb(&ch->ch_neo_uart->ier);
         efr = readb(&ch->ch_neo_uart->efr);
 
-        jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Unsetting Input FLOW\n");
+        jsm_dbg(PARAM, &ch->ch_bd->pci_dev, "Unsetting Input FLOW\n");
 
         /* Turn off auto RTS flow control */
         ier &= ~(UART_17158_IER_RTSDTR);
@@ -237,7 +237,7 @@ static void neo_set_no_output_flow_control(struct jsm_channel *ch)
         ier = readb(&ch->ch_neo_uart->ier);
         efr = readb(&ch->ch_neo_uart->efr);
 
-        jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Unsetting Output FLOW\n");
+        jsm_dbg(PARAM, &ch->ch_bd->pci_dev, "Unsetting Output FLOW\n");
 
         /* Turn off auto CTS flow control */
         ier &= ~(UART_17158_IER_CTSDSR);
@@ -276,7 +276,7 @@ static inline void neo_set_new_start_stop_chars(struct jsm_channel *ch)
         if (ch->ch_c_cflag & CRTSCTS)
                 return;
 
-        jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "start\n");
+        jsm_dbg(PARAM, &ch->ch_bd->pci_dev, "start\n");
 
         /* Tell UART what start/stop chars it should be looking for */
         writeb(ch->ch_startc, &ch->ch_neo_uart->xonchar1);
@@ -455,7 +455,7 @@ static void neo_copy_data_from_uart_to_queue(struct jsm_channel *ch)
                  * I hope thats okay with everyone? Yes? Good.
                  */
                 while (qleft < 1) {
-                        jsm_printk(READ, INFO, &ch->ch_bd->pci_dev,
+                        jsm_dbg(READ, &ch->ch_bd->pci_dev,
                                 "Queue full, dropping DATA:%x LSR:%x\n",
                                 ch->ch_rqueue[tail], ch->ch_equeue[tail]);
 
@@ -467,8 +467,8 @@ static void neo_copy_data_from_uart_to_queue(struct jsm_channel *ch)
                 memcpy_fromio(ch->ch_rqueue + head, &ch->ch_neo_uart->txrxburst, 1);
                 ch->ch_equeue[head] = (u8) linestatus;
 
-                jsm_printk(READ, INFO, &ch->ch_bd->pci_dev,
-                                "DATA/LSR pair: %x %x\n", ch->ch_rqueue[head], ch->ch_equeue[head]);
+                jsm_dbg(READ, &ch->ch_bd->pci_dev, "DATA/LSR pair: %x %x\n",
+                        ch->ch_rqueue[head], ch->ch_equeue[head]);
 
                 /* Ditch any remaining linestatus value. */
                 linestatus = 0;
@@ -521,8 +521,8 @@ static void neo_copy_data_from_queue_to_uart(struct jsm_channel *ch)
                         ch->ch_cached_lsr &= ~(UART_LSR_THRE);
 
                         writeb(circ->buf[circ->tail], &ch->ch_neo_uart->txrx);
-                        jsm_printk(WRITE, INFO, &ch->ch_bd->pci_dev,
-                                        "Tx data: %x\n", circ->buf[circ->tail]);
+                        jsm_dbg(WRITE, &ch->ch_bd->pci_dev,
+                                "Tx data: %x\n", circ->buf[circ->tail]);
                         circ->tail = (circ->tail + 1) & (UART_XMIT_SIZE - 1);
                         ch->ch_txcount++;
                 }
@@ -575,8 +575,9 @@ static void neo_parse_modem(struct jsm_channel *ch, u8 signals)
 {
         u8 msignals = signals;
 
-        jsm_printk(MSIGS, INFO, &ch->ch_bd->pci_dev,
-                        "neo_parse_modem: port: %d msignals: %x\n", ch->ch_portnum, msignals);
+        jsm_dbg(MSIGS, &ch->ch_bd->pci_dev,
+                "neo_parse_modem: port: %d msignals: %x\n",
+                ch->ch_portnum, msignals);
 
         /* Scrub off lower bits. They signify delta's, which I don't care about */
         /* Keep DDCD and DDSR though */
@@ -606,8 +607,8 @@ static void neo_parse_modem(struct jsm_channel *ch, u8 signals)
         else
                 ch->ch_mistat &= ~UART_MSR_CTS;
 
-        jsm_printk(MSIGS, INFO, &ch->ch_bd->pci_dev,
-                        "Port: %d DTR: %d RTS: %d CTS: %d DSR: %d " "RI: %d CD: %d\n",
+        jsm_dbg(MSIGS, &ch->ch_bd->pci_dev,
+                "Port: %d DTR: %d RTS: %d CTS: %d DSR: %d " "RI: %d CD: %d\n",
                 ch->ch_portnum,
                 !!((ch->ch_mistat | ch->ch_mostat) & UART_MCR_DTR),
                 !!((ch->ch_mistat | ch->ch_mostat) & UART_MCR_RTS),
@@ -649,8 +650,8 @@ static void neo_flush_uart_write(struct jsm_channel *ch)
                 /* Check to see if the UART feels it completely flushed the FIFO. */
                 tmp = readb(&ch->ch_neo_uart->isr_fcr);
                 if (tmp & 4) {
-                        jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev,
-                                        "Still flushing TX UART... i: %d\n", i);
+                        jsm_dbg(IOCTL, &ch->ch_bd->pci_dev,
+                                "Still flushing TX UART... i: %d\n", i);
                         udelay(10);
                 }
                 else
@@ -681,8 +682,8 @@ static void neo_flush_uart_read(struct jsm_channel *ch)
                 /* Check to see if the UART feels it completely flushed the FIFO. */
                 tmp = readb(&ch->ch_neo_uart->isr_fcr);
                 if (tmp & 2) {
-                        jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev,
-                                        "Still flushing RX UART... i: %d\n", i);
+                        jsm_dbg(IOCTL, &ch->ch_bd->pci_dev,
+                                "Still flushing RX UART... i: %d\n", i);
                         udelay(10);
                 }
                 else
@@ -705,8 +706,9 @@ static void neo_clear_break(struct jsm_channel *ch, int force)
                 writeb((temp & ~UART_LCR_SBC), &ch->ch_neo_uart->lcr);
 
                 ch->ch_flags &= ~(CH_BREAK_SENDING);
-                jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev,
-                                "clear break Finishing UART_LCR_SBC! finished: %lx\n", jiffies);
+                jsm_dbg(IOCTL, &ch->ch_bd->pci_dev,
+                        "clear break Finishing UART_LCR_SBC! finished: %lx\n",
+                        jiffies);
 
                 /* flush write operation */
                 neo_pci_posting_flush(ch->ch_bd);
@@ -748,8 +750,8 @@ static inline void neo_parse_isr(struct jsm_board *brd, u32 port)
                  */
                 isr &= ~(UART_17158_IIR_FIFO_ENABLED);
 
-                jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev,
-                                "%s:%d isr: %x\n", __FILE__, __LINE__, isr);
+                jsm_dbg(INTR, &ch->ch_bd->pci_dev, "%s:%d isr: %x\n",
+                        __FILE__, __LINE__, isr);
 
                 if (isr & (UART_17158_IIR_RDI_TIMEOUT | UART_IIR_RDI)) {
                         /* Read data from uart -> queue */
@@ -772,8 +774,9 @@ static inline void neo_parse_isr(struct jsm_board *brd, u32 port)
                 if (isr & UART_17158_IIR_XONXOFF) {
                         cause = readb(&ch->ch_neo_uart->xoffchar1);
 
-                        jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev,
-                                        "Port %d. Got ISR_XONXOFF: cause:%x\n", port, cause);
+                        jsm_dbg(INTR, &ch->ch_bd->pci_dev,
+                                "Port %d. Got ISR_XONXOFF: cause:%x\n",
+                                port, cause);
 
                         /*
                          * Since the UART detected either an XON or
@@ -786,17 +789,19 @@ static inline void neo_parse_isr(struct jsm_board *brd, u32 port)
                                 if (brd->channels[port]->ch_flags & CH_STOP) {
                                         ch->ch_flags &= ~(CH_STOP);
                                 }
-                                jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev,
-                                                "Port %d. XON detected in incoming data\n", port);
+                                jsm_dbg(INTR, &ch->ch_bd->pci_dev,
+                                        "Port %d. XON detected in incoming data\n",
+                                        port);
                         }
                         else if (cause == UART_17158_XOFF_DETECT) {
                                 if (!(brd->channels[port]->ch_flags & CH_STOP)) {
                                         ch->ch_flags |= CH_STOP;
-                                        jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev,
-                                                        "Setting CH_STOP\n");
+                                        jsm_dbg(INTR, &ch->ch_bd->pci_dev,
+                                                "Setting CH_STOP\n");
                                 }
-                                jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev,
-                                                "Port: %d. XOFF detected in incoming data\n", port);
+                                jsm_dbg(INTR, &ch->ch_bd->pci_dev,
+                                        "Port: %d. XOFF detected in incoming data\n",
+                                        port);
                         }
                         spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
                 }
@@ -825,8 +830,8 @@ static inline void neo_parse_isr(struct jsm_board *brd, u32 port)
                 }
 
                 /* Parse any modem signal changes */
-                jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev,
-                                "MOD_STAT: sending to parse_modem_sigs\n");
+                jsm_dbg(INTR, &ch->ch_bd->pci_dev,
+                        "MOD_STAT: sending to parse_modem_sigs\n");
                 neo_parse_modem(ch, readb(&ch->ch_neo_uart->msr));
         }
 }
@@ -849,8 +854,8 @@ static inline void neo_parse_lsr(struct jsm_board *brd, u32 port)
 
         linestatus = readb(&ch->ch_neo_uart->lsr);
 
-        jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev,
-                        "%s:%d port: %d linestatus: %x\n", __FILE__, __LINE__, port, linestatus);
+        jsm_dbg(INTR, &ch->ch_bd->pci_dev, "%s:%d port: %d linestatus: %x\n",
+                __FILE__, __LINE__, port, linestatus);
 
         ch->ch_cached_lsr |= linestatus;
 
@@ -869,7 +874,7 @@ static inline void neo_parse_lsr(struct jsm_board *brd, u32 port)
          *to do the special RX+LSR read for this FIFO load.
          */
         if (linestatus & UART_17158_RX_FIFO_DATA_ERROR)
-                jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev,
+                jsm_dbg(INTR, &ch->ch_bd->pci_dev,
                         "%s:%d Port: %d Got an RX error, need to parse LSR\n",
                         __FILE__, __LINE__, port);
 
@@ -880,20 +885,21 @@ static inline void neo_parse_lsr(struct jsm_board *brd, u32 port)
 
         if (linestatus & UART_LSR_PE) {
                 ch->ch_err_parity++;
-                jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev,
-                        "%s:%d Port: %d. PAR ERR!\n", __FILE__, __LINE__, port);
+                jsm_dbg(INTR, &ch->ch_bd->pci_dev, "%s:%d Port: %d. PAR ERR!\n",
+                        __FILE__, __LINE__, port);
         }
 
         if (linestatus & UART_LSR_FE) {
                 ch->ch_err_frame++;
-                jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev,
-                        "%s:%d Port: %d. FRM ERR!\n", __FILE__, __LINE__, port);
+                jsm_dbg(INTR, &ch->ch_bd->pci_dev, "%s:%d Port: %d. FRM ERR!\n",
+                        __FILE__, __LINE__, port);
         }
 
         if (linestatus & UART_LSR_BI) {
                 ch->ch_err_break++;
-                jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev,
-                        "%s:%d Port: %d. BRK INTR!\n", __FILE__, __LINE__, port);
+                jsm_dbg(INTR, &ch->ch_bd->pci_dev,
+                        "%s:%d Port: %d. BRK INTR!\n",
+                        __FILE__, __LINE__, port);
         }
 
         if (linestatus & UART_LSR_OE) {
@@ -904,8 +910,9 @@ static inline void neo_parse_lsr(struct jsm_board *brd, u32 port)
                  * Probably we should eventually have an orun stat in our driver...
                  */
                 ch->ch_err_overrun++;
-                jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev,
-                        "%s:%d Port: %d. Rx Overrun!\n", __FILE__, __LINE__, port);
+                jsm_dbg(INTR, &ch->ch_bd->pci_dev,
+                        "%s:%d Port: %d. Rx Overrun!\n",
+                        __FILE__, __LINE__, port);
         }
 
         if (linestatus & UART_LSR_THRE) {
@@ -1128,11 +1135,11 @@ static irqreturn_t neo_intr(int irq, void *voidbrd)
          */
         uart_poll = readl(brd->re_map_membase + UART_17158_POLL_ADDR_OFFSET);
 
-        jsm_printk(INTR, INFO, &brd->pci_dev,
-                "%s:%d uart_poll: %x\n", __FILE__, __LINE__, uart_poll);
+        jsm_dbg(INTR, &brd->pci_dev, "%s:%d uart_poll: %x\n",
+                __FILE__, __LINE__, uart_poll);
 
         if (!uart_poll) {
-                jsm_printk(INTR, INFO, &brd->pci_dev,
+                jsm_dbg(INTR, &brd->pci_dev,
                         "Kernel interrupted to me, but no pending interrupts...\n");
                 spin_unlock_irqrestore(&brd->bd_intr_lock, lock_flags);
                 return IRQ_NONE;
@@ -1158,15 +1165,15 @@ static irqreturn_t neo_intr(int irq, void *voidbrd)
                         continue;
                 }
 
-                jsm_printk(INTR, INFO, &brd->pci_dev,
-                "%s:%d port: %x type: %x\n", __FILE__, __LINE__, port, type);
+                jsm_dbg(INTR, &brd->pci_dev, "%s:%d port: %x type: %x\n",
+                        __FILE__, __LINE__, port, type);
 
                 /* Remove this port + type from uart_poll */
                 uart_poll &= ~(jsm_offset_table[port]);
 
                 if (!type) {
                         /* If no type, just ignore it, and move onto next port */
-                        jsm_printk(INTR, ERR, &brd->pci_dev,
+                        jsm_dbg(INTR, &brd->pci_dev,
                                 "Interrupt with no type! port: %d\n", port);
                         continue;
                 }
@@ -1231,15 +1238,16 @@ static irqreturn_t neo_intr(int irq, void *voidbrd)
                          * these once and awhile.
                          * Its harmless, just ignore it and move on.
                          */
-                        jsm_printk(INTR, ERR, &brd->pci_dev,
-                                "%s:%d Unknown Interrupt type: %x\n", __FILE__, __LINE__, type);
+                        jsm_dbg(INTR, &brd->pci_dev,
+                                "%s:%d Unknown Interrupt type: %x\n",
+                                __FILE__, __LINE__, type);
                         continue;
                 }
         }
 
         spin_unlock_irqrestore(&brd->bd_intr_lock, lock_flags);
 
-        jsm_printk(INTR, INFO, &brd->pci_dev, "finish.\n");
+        jsm_dbg(INTR, &brd->pci_dev, "finish\n");
         return IRQ_HANDLED;
 }
 
diff --git a/drivers/tty/serial/jsm/jsm_tty.c b/drivers/tty/serial/jsm/jsm_tty.c
index 71397961773c..4c00c5550b1a 100644
--- a/drivers/tty/serial/jsm/jsm_tty.c
+++ b/drivers/tty/serial/jsm/jsm_tty.c
@@ -43,7 +43,7 @@ static inline int jsm_get_mstat(struct jsm_channel *ch)
         unsigned char mstat;
         unsigned result;
 
-        jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, "start\n");
+        jsm_dbg(IOCTL, &ch->ch_bd->pci_dev, "start\n");
 
         mstat = (ch->ch_mostat | ch->ch_mistat);
 
@@ -62,7 +62,7 @@ static inline int jsm_get_mstat(struct jsm_channel *ch)
         if (mstat & UART_MSR_DCD)
                 result |= TIOCM_CD;
 
-        jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, "finish\n");
+        jsm_dbg(IOCTL, &ch->ch_bd->pci_dev, "finish\n");
         return result;
 }
 
@@ -79,14 +79,14 @@ static unsigned int jsm_tty_get_mctrl(struct uart_port *port)
         int result;
         struct jsm_channel *channel = (struct jsm_channel *)port;
 
-        jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n");
+        jsm_dbg(IOCTL, &channel->ch_bd->pci_dev, "start\n");
 
         result = jsm_get_mstat(channel);
 
         if (result < 0)
                 return -ENXIO;
 
-        jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n");
+        jsm_dbg(IOCTL, &channel->ch_bd->pci_dev, "finish\n");
 
         return result;
 }
@@ -100,7 +100,7 @@ static void jsm_tty_set_mctrl(struct uart_port *port, unsigned int mctrl)
 {
         struct jsm_channel *channel = (struct jsm_channel *)port;
 
-        jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n");
+        jsm_dbg(IOCTL, &channel->ch_bd->pci_dev, "start\n");
 
         if (mctrl & TIOCM_RTS)
                 channel->ch_mostat |= UART_MCR_RTS;
@@ -114,7 +114,7 @@ static void jsm_tty_set_mctrl(struct uart_port *port, unsigned int mctrl)
 
         channel->ch_bd->bd_ops->assert_modem_signals(channel);
 
-        jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n");
+        jsm_dbg(IOCTL, &channel->ch_bd->pci_dev, "finish\n");
         udelay(10);
 }
 
@@ -135,23 +135,23 @@ static void jsm_tty_start_tx(struct uart_port *port)
 {
         struct jsm_channel *channel = (struct jsm_channel *)port;
 
-        jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n");
+        jsm_dbg(IOCTL, &channel->ch_bd->pci_dev, "start\n");
 
         channel->ch_flags &= ~(CH_STOP);
         jsm_tty_write(port);
 
-        jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n");
+        jsm_dbg(IOCTL, &channel->ch_bd->pci_dev, "finish\n");
 }
 
 static void jsm_tty_stop_tx(struct uart_port *port)
 {
         struct jsm_channel *channel = (struct jsm_channel *)port;
 
-        jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n");
+        jsm_dbg(IOCTL, &channel->ch_bd->pci_dev, "start\n");
 
         channel->ch_flags |= (CH_STOP);
 
-        jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n");
+        jsm_dbg(IOCTL, &channel->ch_bd->pci_dev, "finish\n");
 }
 
 static void jsm_tty_send_xchar(struct uart_port *port, char ch)
@@ -216,16 +216,16 @@ static int jsm_tty_open(struct uart_port *port)
         if (!channel->ch_rqueue) {
                 channel->ch_rqueue = kzalloc(RQUEUESIZE, GFP_KERNEL);
                 if (!channel->ch_rqueue) {
-                        jsm_printk(INIT, ERR, &channel->ch_bd->pci_dev,
-                                "unable to allocate read queue buf");
+                        jsm_dbg(INIT, &channel->ch_bd->pci_dev,
+                                "unable to allocate read queue buf\n");
                         return -ENOMEM;
                 }
         }
         if (!channel->ch_equeue) {
                 channel->ch_equeue = kzalloc(EQUEUESIZE, GFP_KERNEL);
                 if (!channel->ch_equeue) {
-                        jsm_printk(INIT, ERR, &channel->ch_bd->pci_dev,
-                                "unable to allocate error queue buf");
+                        jsm_dbg(INIT, &channel->ch_bd->pci_dev,
+                                "unable to allocate error queue buf\n");
                         return -ENOMEM;
                 }
         }
@@ -234,7 +234,7 @@ static int jsm_tty_open(struct uart_port *port)
         /*
          * Initialize if neither terminal is open.
          */
-        jsm_printk(OPEN, INFO, &channel->ch_bd->pci_dev,
+        jsm_dbg(OPEN, &channel->ch_bd->pci_dev,
                 "jsm_open: initializing channel in open...\n");
 
         /*
@@ -270,7 +270,7 @@ static int jsm_tty_open(struct uart_port *port)
 
         channel->ch_open_count++;
 
-        jsm_printk(OPEN, INFO, &channel->ch_bd->pci_dev, "finish\n");
+        jsm_dbg(OPEN, &channel->ch_bd->pci_dev, "finish\n");
         return 0;
 }
 
@@ -280,7 +280,7 @@ static void jsm_tty_close(struct uart_port *port)
         struct ktermios *ts;
         struct jsm_channel *channel = (struct jsm_channel *)port;
 
-        jsm_printk(CLOSE, INFO, &channel->ch_bd->pci_dev, "start\n");
+        jsm_dbg(CLOSE, &channel->ch_bd->pci_dev, "start\n");
 
         bd = channel->ch_bd;
         ts = &port->state->port.tty->termios;
@@ -293,7 +293,7 @@ static void jsm_tty_close(struct uart_port *port)
          * If we have HUPCL set, lower DTR and RTS
          */
         if (channel->ch_c_cflag & HUPCL) {
-                jsm_printk(CLOSE, INFO, &channel->ch_bd->pci_dev,
+                jsm_dbg(CLOSE, &channel->ch_bd->pci_dev,
                         "Close. HUPCL set, dropping DTR/RTS\n");
 
                 /* Drop RTS/DTR */
@@ -304,7 +304,7 @@ static void jsm_tty_close(struct uart_port *port)
         /* Turn off UART interrupts for this port */
         channel->ch_bd->bd_ops->uart_off(channel);
 
-        jsm_printk(CLOSE, INFO, &channel->ch_bd->pci_dev, "finish\n");
+        jsm_dbg(CLOSE, &channel->ch_bd->pci_dev, "finish\n");
 }
 
 static void jsm_tty_set_termios(struct uart_port *port,
@@ -371,7 +371,7 @@ static struct uart_ops jsm_ops = {
  * Init the tty subsystem.  Called once per board after board has been
  * downloaded and init'ed.
  */
-int __devinit jsm_tty_init(struct jsm_board *brd)
+int jsm_tty_init(struct jsm_board *brd)
 {
         int i;
         void __iomem *vaddr;
@@ -380,7 +380,7 @@ int __devinit jsm_tty_init(struct jsm_board *brd)
         if (!brd)
                 return -ENXIO;
 
-        jsm_printk(INIT, INFO, &brd->pci_dev, "start\n");
+        jsm_dbg(INIT, &brd->pci_dev, "start\n");
 
         /*
          * Initialize board structure elements.
@@ -401,9 +401,9 @@ int __devinit jsm_tty_init(struct jsm_board *brd)
                          */
                         brd->channels[i] = kzalloc(sizeof(struct jsm_channel), GFP_KERNEL);
                         if (!brd->channels[i]) {
-                                jsm_printk(CORE, ERR, &brd->pci_dev,
+                                jsm_dbg(CORE, &brd->pci_dev,
                                         "%s:%d Unable to allocate memory for channel struct\n",
-                                                         __FILE__, __LINE__);
+                                        __FILE__, __LINE__);
                         }
                 }
         }
@@ -431,7 +431,7 @@ int __devinit jsm_tty_init(struct jsm_board *brd)
                 init_waitqueue_head(&ch->ch_flags_wait);
         }
 
-        jsm_printk(INIT, INFO, &brd->pci_dev, "finish\n");
+        jsm_dbg(INIT, &brd->pci_dev, "finish\n");
         return 0;
 }
 
@@ -444,7 +444,7 @@ int jsm_uart_port_init(struct jsm_board *brd)
         if (!brd)
                 return -ENXIO;
 
-        jsm_printk(INIT, INFO, &brd->pci_dev, "start\n");
+        jsm_dbg(INIT, &brd->pci_dev, "start\n");
 
         /*
          * Initialize board structure elements.
@@ -481,7 +481,7 @@ int jsm_uart_port_init(struct jsm_board *brd)
                         printk(KERN_INFO "jsm: Port %d added\n", i);
         }
 
-        jsm_printk(INIT, INFO, &brd->pci_dev, "finish\n");
+        jsm_dbg(INIT, &brd->pci_dev, "finish\n");
         return 0;
 }
 
@@ -493,7 +493,7 @@ int jsm_remove_uart_port(struct jsm_board *brd)
         if (!brd)
                 return -ENXIO;
 
-        jsm_printk(INIT, INFO, &brd->pci_dev, "start\n");
+        jsm_dbg(INIT, &brd->pci_dev, "start\n");
 
         /*
          * Initialize board structure elements.
@@ -513,7 +513,7 @@ int jsm_remove_uart_port(struct jsm_board *brd)
                 uart_remove_one_port(&jsm_uart_driver, &brd->channels[i]->uart_port);
         }
 
-        jsm_printk(INIT, INFO, &brd->pci_dev, "finish\n");
+        jsm_dbg(INIT, &brd->pci_dev, "finish\n");
         return 0;
 }
 
@@ -531,7 +531,7 @@ void jsm_input(struct jsm_channel *ch)
         int s = 0;
         int i = 0;
 
-        jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "start\n");
+        jsm_dbg(READ, &ch->ch_bd->pci_dev, "start\n");
 
         if (!ch)
                 return;
@@ -560,7 +560,7 @@ void jsm_input(struct jsm_channel *ch)
                 return;
         }
 
-        jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "start\n");
+        jsm_dbg(READ, &ch->ch_bd->pci_dev, "start\n");
 
         /*
          *If the device is not open, or CREAD is off, flush
@@ -569,8 +569,9 @@ void jsm_input(struct jsm_channel *ch)
         if (!tp ||
                 !(tp->termios.c_cflag & CREAD) ) {
 
-                jsm_printk(READ, INFO, &ch->ch_bd->pci_dev,
-                        "input. dropping %d bytes on port %d...\n", data_len, ch->ch_portnum);
+                jsm_dbg(READ, &ch->ch_bd->pci_dev,
+                        "input. dropping %d bytes on port %d...\n",
+                        data_len, ch->ch_portnum);
                 ch->ch_r_head = tail;
 
                 /* Force queue flow control to be released, if needed */
@@ -585,17 +586,17 @@ void jsm_input(struct jsm_channel *ch)
          */
         if (ch->ch_flags & CH_STOPI) {
                 spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
-                jsm_printk(READ, INFO, &ch->ch_bd->pci_dev,
+                jsm_dbg(READ, &ch->ch_bd->pci_dev,
                         "Port %d throttled, not reading any data. head: %x tail: %x\n",
                         ch->ch_portnum, head, tail);
                 return;
         }
 
-        jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "start 2\n");
+        jsm_dbg(READ, &ch->ch_bd->pci_dev, "start 2\n");
 
         if (data_len <= 0) {
                 spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
-                jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "jsm_input 1\n");
+                jsm_dbg(READ, &ch->ch_bd->pci_dev, "jsm_input 1\n");
                 return;
         }
 
@@ -653,7 +654,7 @@ void jsm_input(struct jsm_channel *ch)
         /* Tell the tty layer its okay to "eat" the data now */
         tty_flip_buffer_push(tp);
 
-        jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, "finish\n");
+        jsm_dbg(IOCTL, &ch->ch_bd->pci_dev, "finish\n");
 }
 
 static void jsm_carrier(struct jsm_channel *ch)
@@ -663,7 +664,7 @@ static void jsm_carrier(struct jsm_channel *ch)
         int virt_carrier = 0;
         int phys_carrier = 0;
 
-        jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev, "start\n");
+        jsm_dbg(CARR, &ch->ch_bd->pci_dev, "start\n");
         if (!ch)
                 return;
 
@@ -673,16 +674,16 @@ static void jsm_carrier(struct jsm_channel *ch)
                 return;
 
         if (ch->ch_mistat & UART_MSR_DCD) {
-                jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev,
-                        "mistat: %x D_CD: %x\n", ch->ch_mistat, ch->ch_mistat & UART_MSR_DCD);
+                jsm_dbg(CARR, &ch->ch_bd->pci_dev, "mistat: %x D_CD: %x\n",
+                        ch->ch_mistat, ch->ch_mistat & UART_MSR_DCD);
                 phys_carrier = 1;
         }
 
         if (ch->ch_c_cflag & CLOCAL)
                 virt_carrier = 1;
 
-        jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev,
-                "DCD: physical: %d virt: %d\n", phys_carrier, virt_carrier);
+        jsm_dbg(CARR, &ch->ch_bd->pci_dev, "DCD: physical: %d virt: %d\n",
+                phys_carrier, virt_carrier);
 
         /*
          * Test for a VIRTUAL carrier transition to HIGH.
@@ -694,8 +695,7 @@ static void jsm_carrier(struct jsm_channel *ch)
                  * for carrier in the open routine.
                  */
 
-                jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev,
-                        "carrier: virt DCD rose\n");
+                jsm_dbg(CARR, &ch->ch_bd->pci_dev, "carrier: virt DCD rose\n");
 
                 if (waitqueue_active(&(ch->ch_flags_wait)))
                         wake_up_interruptible(&ch->ch_flags_wait);
@@ -711,7 +711,7 @@ static void jsm_carrier(struct jsm_channel *ch)
                  * for carrier in the open routine.
                  */
 
-                jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev,
+                jsm_dbg(CARR, &ch->ch_bd->pci_dev,
                         "carrier: physical DCD rose\n");
 
                 if (waitqueue_active(&(ch->ch_flags_wait)))
@@ -790,8 +790,8 @@ void jsm_check_queue_flow_control(struct jsm_channel *ch)
                         if(!(ch->ch_flags & CH_RECEIVER_OFF)) {
                                 bd_ops->disable_receiver(ch);
                                 ch->ch_flags |= (CH_RECEIVER_OFF);
-                                jsm_printk(READ, INFO, &ch->ch_bd->pci_dev,
-                                        "Internal queue hit hilevel mark (%d)! Turning off interrupts.\n",
+                                jsm_dbg(READ, &ch->ch_bd->pci_dev,
+                                        "Internal queue hit hilevel mark (%d)! Turning off interrupts\n",
                                         qleft);
                         }
                 }
@@ -800,8 +800,9 @@ void jsm_check_queue_flow_control(struct jsm_channel *ch)
                         if (ch->ch_stops_sent <= MAX_STOPS_SENT) {
                                 bd_ops->send_stop_character(ch);
                                 ch->ch_stops_sent++;
-                                jsm_printk(READ, INFO, &ch->ch_bd->pci_dev,
-                                        "Sending stop char! Times sent: %x\n", ch->ch_stops_sent);
+                                jsm_dbg(READ, &ch->ch_bd->pci_dev,
+                                        "Sending stop char! Times sent: %x\n",
+                                        ch->ch_stops_sent);
                         }
                 }
         }
@@ -827,8 +828,8 @@ void jsm_check_queue_flow_control(struct jsm_channel *ch)
                         if (ch->ch_flags & CH_RECEIVER_OFF) {
                                 bd_ops->enable_receiver(ch);
                                 ch->ch_flags &= ~(CH_RECEIVER_OFF);
-                                jsm_printk(READ, INFO, &ch->ch_bd->pci_dev,
-                                        "Internal queue hit lowlevel mark (%d)! Turning on interrupts.\n",
+                                jsm_dbg(READ, &ch->ch_bd->pci_dev,
+                                        "Internal queue hit lowlevel mark (%d)! Turning on interrupts\n",
                                         qleft);
                         }
                 }
@@ -836,7 +837,8 @@ void jsm_check_queue_flow_control(struct jsm_channel *ch)
                 else if (ch->ch_c_iflag & IXOFF && ch->ch_stops_sent) {
                         ch->ch_stops_sent = 0;
                         bd_ops->send_start_character(ch);
-                        jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "Sending start char!\n");
+                        jsm_dbg(READ, &ch->ch_bd->pci_dev,
+                                "Sending start char!\n");
                 }
         }
 }
diff --git a/drivers/tty/serial/kgdb_nmi.c b/drivers/tty/serial/kgdb_nmi.c
index d185247ba1aa..6ac2b797a764 100644
--- a/drivers/tty/serial/kgdb_nmi.c
+++ b/drivers/tty/serial/kgdb_nmi.c
@@ -266,6 +266,7 @@ static int kgdb_nmi_tty_install(struct tty_driver *drv, struct tty_struct *tty)
         }
         return 0;
 err:
+        tty_port_destroy(&priv->port);
         kfree(priv);
         return ret;
 }
@@ -275,6 +276,7 @@ static void kgdb_nmi_tty_cleanup(struct tty_struct *tty)
         struct kgdb_nmi_tty_priv *priv = tty->driver_data;
 
         tty->driver_data = NULL;
+        tty_port_destroy(&priv->port);
         kfree(priv);
 }
 
diff --git a/drivers/tty/serial/lpc32xx_hs.c b/drivers/tty/serial/lpc32xx_hs.c
index ba3af3bf6d43..0e86bff3fe2a 100644
--- a/drivers/tty/serial/lpc32xx_hs.c
+++ b/drivers/tty/serial/lpc32xx_hs.c
@@ -686,7 +686,7 @@ static struct uart_ops serial_lpc32xx_pops = {
 /*
  * Register a set of serial devices attached to a platform device
  */
-static int __devinit serial_hs_lpc32xx_probe(struct platform_device *pdev)
+static int serial_hs_lpc32xx_probe(struct platform_device *pdev)
 {
         struct lpc32xx_hsuart_port *p = &lpc32xx_hs_ports[uarts_registered];
         int ret = 0;
@@ -740,7 +740,7 @@ static int __devinit serial_hs_lpc32xx_probe(struct platform_device *pdev)
 /*
  * Remove serial ports registered against a platform device.
  */
-static int __devexit serial_hs_lpc32xx_remove(struct platform_device *pdev)
+static int serial_hs_lpc32xx_remove(struct platform_device *pdev)
 {
         struct lpc32xx_hsuart_port *p = platform_get_drvdata(pdev);
 
@@ -783,7 +783,7 @@ MODULE_DEVICE_TABLE(of, serial_hs_lpc32xx_dt_ids);
 
 static struct platform_driver serial_hs_lpc32xx_driver = {
         .probe          = serial_hs_lpc32xx_probe,
-        .remove         = __devexit_p(serial_hs_lpc32xx_remove),
+        .remove         = serial_hs_lpc32xx_remove,
         .suspend        = serial_hs_lpc32xx_suspend,
         .resume         = serial_hs_lpc32xx_resume,
         .driver         = {
diff --git a/drivers/tty/serial/max3100.c b/drivers/tty/serial/max3100.c
index 0f24486be532..7ce3197087bb 100644
--- a/drivers/tty/serial/max3100.c
+++ b/drivers/tty/serial/max3100.c
@@ -742,7 +742,7 @@ static struct uart_driver max3100_uart_driver = {
 };
 static int uart_driver_registered;
 
-static int __devinit max3100_probe(struct spi_device *spi)
+static int max3100_probe(struct spi_device *spi)
 {
         int i, retval;
         struct plat_max3100 *pdata;
@@ -818,7 +818,7 @@ static int __devinit max3100_probe(struct spi_device *spi)
         return 0;
 }
 
-static int __devexit max3100_remove(struct spi_device *spi)
+static int max3100_remove(struct spi_device *spi)
 {
         struct max3100_port *s = dev_get_drvdata(&spi->dev);
         int i;
@@ -907,7 +907,7 @@ static struct spi_driver max3100_driver = {
         },
 
         .probe          = max3100_probe,
-        .remove         = __devexit_p(max3100_remove),
+        .remove         = max3100_remove,
         .suspend        = max3100_suspend,
         .resume         = max3100_resume,
 };
diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
index 1ab1d2c66de4..a801f6872cad 100644
--- a/drivers/tty/serial/max310x.c
+++ b/drivers/tty/serial/max310x.c
@@ -378,7 +378,7 @@ static void max310x_wait_pll(struct max310x_port *s)
         }
 }
 
-static int __devinit max310x_update_best_err(unsigned long f, long *besterr)
+static int max310x_update_best_err(unsigned long f, long *besterr)
 {
         /* Use baudrate 115200 for calculate error */
         long err = f % (115200 * 16);
@@ -391,7 +391,7 @@ static int __devinit max310x_update_best_err(unsigned long f, long *besterr)
         return 1;
 }
 
-static int __devinit max310x_set_ref_clk(struct max310x_port *s)
+static int max310x_set_ref_clk(struct max310x_port *s)
 {
         unsigned int div, clksrc, pllcfg = 0;
         long besterr = -1;
@@ -995,7 +995,7 @@ static struct max310x_pdata generic_plat_data = {
         .frequency      = 26000000,
 };
 
-static int __devinit max310x_probe(struct spi_device *spi)
+static int max310x_probe(struct spi_device *spi)
 {
         struct max310x_port *s;
         struct device *dev = &spi->dev;
@@ -1178,6 +1178,7 @@ static int __devinit max310x_probe(struct spi_device *spi)
                 s->gpio.set             = max310x_gpio_set;
                 s->gpio.base            = pdata->gpio_base;
                 s->gpio.ngpio           = s->nr_gpio;
+                s->gpio.can_sleep       = 1;
                 if (gpiochip_add(&s->gpio)) {
                         /* Indicate that we should not call gpiochip_remove */
                         s->gpio.base = 0;
@@ -1202,7 +1203,7 @@ err_out:
         return ret;
 }
 
-static int __devexit max310x_remove(struct spi_device *spi)
+static int max310x_remove(struct spi_device *spi)
 {
         struct device *dev = &spi->dev;
         struct max310x_port *s = dev_get_drvdata(dev);
@@ -1249,7 +1250,7 @@ static struct spi_driver max310x_driver = {
                 .owner  = THIS_MODULE,
         },
         .probe          = max310x_probe,
-        .remove         = __devexit_p(max310x_remove),
+        .remove         = max310x_remove,
         .suspend        = max310x_suspend,
         .resume         = max310x_resume,
         .id_table       = max310x_id_table,
diff --git a/drivers/tty/serial/mcf.c b/drivers/tty/serial/mcf.c
index 9afca093d6ec..fcd56ab6053f 100644
--- a/drivers/tty/serial/mcf.c
+++ b/drivers/tty/serial/mcf.c
@@ -571,7 +571,7 @@ static struct uart_driver mcf_driver = {
 
 /****************************************************************************/
 
-static int __devinit mcf_probe(struct platform_device *pdev)
+static int mcf_probe(struct platform_device *pdev)
 {
         struct mcf_platform_uart *platp = pdev->dev.platform_data;
         struct uart_port *port;
@@ -599,7 +599,7 @@ static int __devinit mcf_probe(struct platform_device *pdev)
 
 /****************************************************************************/
 
-static int __devexit mcf_remove(struct platform_device *pdev)
+static int mcf_remove(struct platform_device *pdev)
 {
         struct uart_port *port;
         int i;
@@ -617,7 +617,7 @@ static int __devexit mcf_remove(struct platform_device *pdev)
 
 static struct platform_driver mcf_platform_driver = {
         .probe          = mcf_probe,
-        .remove         = __devexit_p(mcf_remove),
+        .remove         = mcf_remove,
         .driver         = {
                 .name   = "mcfuart",
                 .owner  = THIS_MODULE,
diff --git a/drivers/tty/serial/mfd.c b/drivers/tty/serial/mfd.c
index c4b50af46c44..2c01344dc332 100644
--- a/drivers/tty/serial/mfd.c
+++ b/drivers/tty/serial/mfd.c
@@ -36,6 +36,7 @@
 #include <linux/serial_mfd.h>
 #include <linux/dma-mapping.h>
 #include <linux/pci.h>
+#include <linux/nmi.h>
 #include <linux/io.h>
 #include <linux/debugfs.h>
 #include <linux/pm_runtime.h>
@@ -1113,6 +1114,8 @@ serial_hsu_console_write(struct console *co, const char *s, unsigned int count)
         unsigned int ier;
         int locked = 1;
 
+        touch_nmi_watchdog();
+
         local_irq_save(flags);
         if (up->port.sysrq)
                 locked = 0;
@@ -1456,7 +1459,7 @@ static void serial_hsu_remove(struct pci_dev *pdev)
 }
 
 /* First 3 are UART ports, and the 4th is the DMA */
-static const struct pci_device_id pci_ids[] __devinitconst = {
+static const struct pci_device_id pci_ids[] = {
         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081B) },
         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081C) },
         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081D) },
@@ -1468,7 +1471,7 @@ static struct pci_driver hsu_pci_driver = {
         .name =         "HSU serial",
         .id_table =     pci_ids,
         .probe =        serial_hsu_probe,
-        .remove =       __devexit_p(serial_hsu_remove),
+        .remove =       serial_hsu_remove,
         .suspend =      serial_hsu_suspend,
         .resume =       serial_hsu_resume,
         .driver = {
diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c
index 8cf577008ad7..7c23c4f4c58d 100644
--- a/drivers/tty/serial/mpc52xx_uart.c
+++ b/drivers/tty/serial/mpc52xx_uart.c
@@ -1308,7 +1308,7 @@ static struct of_device_id mpc52xx_uart_of_match[] = {
         {},
 };
 
-static int __devinit mpc52xx_uart_of_probe(struct platform_device *op)
+static int mpc52xx_uart_of_probe(struct platform_device *op)
 {
         int idx = -1;
         unsigned int uartclk;
diff --git a/drivers/tty/serial/mrst_max3110.c b/drivers/tty/serial/mrst_max3110.c
index df2a2240a3ae..58734d7e746d 100644
--- a/drivers/tty/serial/mrst_max3110.c
+++ b/drivers/tty/serial/mrst_max3110.c
@@ -773,7 +773,7 @@ static int serial_m3110_resume(struct spi_device *spi)
 #define serial_m3110_resume     NULL
 #endif
 
-static int __devinit serial_m3110_probe(struct spi_device *spi)
+static int serial_m3110_probe(struct spi_device *spi)
 {
         struct uart_max3110 *max;
         void *buffer;
@@ -855,7 +855,7 @@ err_get_page:
         return ret;
 }
 
-static int __devexit serial_m3110_remove(struct spi_device *dev)
+static int serial_m3110_remove(struct spi_device *dev)
 {
         struct uart_max3110 *max = spi_get_drvdata(dev);
 
@@ -879,7 +879,7 @@ static struct spi_driver uart_max3110_driver = {
                         .owner  = THIS_MODULE,
         },
         .probe          = serial_m3110_probe,
-        .remove         = __devexit_p(serial_m3110_remove),
+        .remove         = serial_m3110_remove,
         .suspend        = serial_m3110_suspend,
         .resume         = serial_m3110_resume,
 };
diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
index 033e0bc9ebab..95fd39be2934 100644
--- a/drivers/tty/serial/msm_serial.c
+++ b/drivers/tty/serial/msm_serial.c
@@ -917,7 +917,7 @@ static int __init msm_serial_probe(struct platform_device *pdev)
         return uart_add_one_port(&msm_uart_driver, port);
 }
 
-static int __devexit msm_serial_remove(struct platform_device *pdev)
+static int msm_serial_remove(struct platform_device *pdev)
 {
         struct msm_port *msm_port = platform_get_drvdata(pdev);
 
diff --git a/drivers/tty/serial/msm_serial_hs.c b/drivers/tty/serial/msm_serial_hs.c
index fca13dc73e23..1fa92284ade0 100644
--- a/drivers/tty/serial/msm_serial_hs.c
+++ b/drivers/tty/serial/msm_serial_hs.c
@@ -401,7 +401,7 @@ static int msm_hs_request_port(struct uart_port *port)
         return 0;
 }
 
-static int __devexit msm_hs_remove(struct platform_device *pdev)
+static int msm_hs_remove(struct platform_device *pdev)
 {
 
         struct msm_hs_port *msm_uport;
@@ -1521,7 +1521,7 @@ err_msm_hs_init_clk:
 }
 
 /* Initialize tx and rx data structures */
-static int __devinit uartdm_init_port(struct uart_port *uport)
+static int uartdm_init_port(struct uart_port *uport)
 {
         int ret = 0;
         struct msm_hs_port *msm_uport = UARTDM_TO_MSM(uport);
@@ -1614,7 +1614,7 @@ err_tx_command_ptr_ptr:
         return ret;
 }
 
-static int __devinit msm_hs_probe(struct platform_device *pdev)
+static int msm_hs_probe(struct platform_device *pdev)
 {
         int ret;
         struct uart_port *uport;
@@ -1838,7 +1838,7 @@ static const struct dev_pm_ops msm_hs_dev_pm_ops = {
 
 static struct platform_driver msm_serial_hs_platform_driver = {
         .probe = msm_hs_probe,
-        .remove = __devexit_p(msm_hs_remove),
+        .remove = msm_hs_remove,
         .driver = {
                 .name = "msm_serial_hs",
                 .owner = THIS_MODULE,
diff --git a/drivers/tty/serial/mux.c b/drivers/tty/serial/mux.c
index 7ea8a263fd9e..e2775b6df5a5 100644
--- a/drivers/tty/serial/mux.c
+++ b/drivers/tty/serial/mux.c
@@ -520,7 +520,7 @@ static int __init mux_probe(struct parisc_device *dev)
         return 0;
 }
 
-static int __devexit mux_remove(struct parisc_device *dev)
+static int mux_remove(struct parisc_device *dev)
 {
         int i, j;
         int port_count = (long)dev_get_drvdata(&dev->dev);
@@ -571,14 +571,14 @@ static struct parisc_driver builtin_serial_mux_driver = {
         .name =         "builtin_serial_mux",
         .id_table =     builtin_mux_tbl,
         .probe =        mux_probe,
-        .remove =       __devexit_p(mux_remove),
+        .remove =       mux_remove,
 };
 
 static struct parisc_driver serial_mux_driver = {
         .name =         "serial_mux",
         .id_table =     mux_tbl,
         .probe =        mux_probe,
-        .remove =       __devexit_p(mux_remove),
+        .remove =       mux_remove,
 };
 
 /**
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index 6db3baa39a97..6db23b035efe 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -34,6 +34,8 @@
 #include <linux/io.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/of_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/fsl/mxs-dma.h>
 
 #include <asm/cacheflush.h>
 
@@ -71,6 +73,15 @@
 
 #define AUART_CTRL0_SFTRST                      (1 << 31)
 #define AUART_CTRL0_CLKGATE                     (1 << 30)
+#define AUART_CTRL0_RXTO_ENABLE                 (1 << 27)
+#define AUART_CTRL0_RXTIMEOUT(v)                (((v) & 0x7ff) << 16)
+#define AUART_CTRL0_XFER_COUNT(v)               ((v) & 0xffff)
+
+#define AUART_CTRL1_XFER_COUNT(v)               ((v) & 0xffff)
+
+#define AUART_CTRL2_DMAONERR                    (1 << 26)
+#define AUART_CTRL2_TXDMAE                      (1 << 25)
+#define AUART_CTRL2_RXDMAE                      (1 << 24)
 
 #define AUART_CTRL2_CTSEN                       (1 << 15)
 #define AUART_CTRL2_RTSEN                       (1 << 14)
@@ -111,29 +122,170 @@
 #define AUART_STAT_BERR                         (1 << 18)
 #define AUART_STAT_PERR                         (1 << 17)
 #define AUART_STAT_FERR                         (1 << 16)
+#define AUART_STAT_RXCOUNT_MASK                 0xffff
 
 static struct uart_driver auart_driver;
 
+enum mxs_auart_type {
+        IMX23_AUART,
+        IMX28_AUART,
+};
+
 struct mxs_auart_port {
         struct uart_port port;
 
-        unsigned int flags;
+#define MXS_AUART_DMA_CONFIG    0x1
+#define MXS_AUART_DMA_ENABLED   0x2
+#define MXS_AUART_DMA_TX_SYNC   2  /* bit 2 */
+#define MXS_AUART_DMA_RX_READY  3  /* bit 3 */
+        unsigned long flags;
         unsigned int ctrl;
+        enum mxs_auart_type devtype;
 
         unsigned int irq;
 
         struct clk *clk;
         struct device *dev;
+
+        /* for DMA */
+        struct mxs_dma_data dma_data;
+        int dma_channel_rx, dma_channel_tx;
+        int dma_irq_rx, dma_irq_tx;
+        int dma_channel;
+
+        struct scatterlist tx_sgl;
+        struct dma_chan *tx_dma_chan;
+        void *tx_dma_buf;
+
+        struct scatterlist rx_sgl;
+        struct dma_chan *rx_dma_chan;
+        void *rx_dma_buf;
+};
+
+static struct platform_device_id mxs_auart_devtype[] = {
+        { .name = "mxs-auart-imx23", .driver_data = IMX23_AUART },
+        { .name = "mxs-auart-imx28", .driver_data = IMX28_AUART },
+        { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, mxs_auart_devtype);
+
+static struct of_device_id mxs_auart_dt_ids[] = {
+        {
+                .compatible = "fsl,imx28-auart",
+                .data = &mxs_auart_devtype[IMX28_AUART]
+        }, {
+                .compatible = "fsl,imx23-auart",
+                .data = &mxs_auart_devtype[IMX23_AUART]
+        }, { /* sentinel */ }
 };
+MODULE_DEVICE_TABLE(of, mxs_auart_dt_ids);
+
+static inline int is_imx28_auart(struct mxs_auart_port *s)
+{
+        return s->devtype == IMX28_AUART;
+}
+
+static inline bool auart_dma_enabled(struct mxs_auart_port *s)
+{
+        return s->flags & MXS_AUART_DMA_ENABLED;
+}
 
 static void mxs_auart_stop_tx(struct uart_port *u);
 
 #define to_auart_port(u) container_of(u, struct mxs_auart_port, port)
 
-static inline void mxs_auart_tx_chars(struct mxs_auart_port *s)
+static void mxs_auart_tx_chars(struct mxs_auart_port *s);
+
+static void dma_tx_callback(void *param)
 {
+        struct mxs_auart_port *s = param;
         struct circ_buf *xmit = &s->port.state->xmit;
 
+        dma_unmap_sg(s->dev, &s->tx_sgl, 1, DMA_TO_DEVICE);
+
+        /* clear the bit used to serialize the DMA tx. */
+        clear_bit(MXS_AUART_DMA_TX_SYNC, &s->flags);
+        smp_mb__after_clear_bit();
+
+        /* wake up the possible processes. */
+        if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+                uart_write_wakeup(&s->port);
+
+        mxs_auart_tx_chars(s);
+}
+
+static int mxs_auart_dma_tx(struct mxs_auart_port *s, int size)
+{
+        struct dma_async_tx_descriptor *desc;
+        struct scatterlist *sgl = &s->tx_sgl;
+        struct dma_chan *channel = s->tx_dma_chan;
+        u32 pio;
+
+        /* [1] : send PIO. Note, the first pio word is CTRL1. */
+        pio = AUART_CTRL1_XFER_COUNT(size);
+        desc = dmaengine_prep_slave_sg(channel, (struct scatterlist *)&pio,
+                                        1, DMA_TRANS_NONE, 0);
+        if (!desc) {
+                dev_err(s->dev, "step 1 error\n");
+                return -EINVAL;
+        }
+
+        /* [2] : set DMA buffer. */
+        sg_init_one(sgl, s->tx_dma_buf, size);
+        dma_map_sg(s->dev, sgl, 1, DMA_TO_DEVICE);
+        desc = dmaengine_prep_slave_sg(channel, sgl,
+                        1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+        if (!desc) {
+                dev_err(s->dev, "step 2 error\n");
+                return -EINVAL;
+        }
+
+        /* [3] : submit the DMA */
+        desc->callback = dma_tx_callback;
+        desc->callback_param = s;
+        dmaengine_submit(desc);
+        dma_async_issue_pending(channel);
+        return 0;
+}
+
+static void mxs_auart_tx_chars(struct mxs_auart_port *s)
+{
+        struct circ_buf *xmit = &s->port.state->xmit;
+
+        if (auart_dma_enabled(s)) {
+                int i = 0;
+                int size;
+                void *buffer = s->tx_dma_buf;
+
+                if (test_and_set_bit(MXS_AUART_DMA_TX_SYNC, &s->flags))
+                        return;
+
+                while (!uart_circ_empty(xmit) && !uart_tx_stopped(&s->port)) {
+                        size = min_t(u32, UART_XMIT_SIZE - i,
+                                     CIRC_CNT_TO_END(xmit->head,
+                                                     xmit->tail,
+                                                     UART_XMIT_SIZE));
+                        memcpy(buffer + i, xmit->buf + xmit->tail, size);
+                        xmit->tail = (xmit->tail + size) & (UART_XMIT_SIZE - 1);
+
+                        i += size;
+                        if (i >= UART_XMIT_SIZE)
+                                break;
+                }
+
+                if (uart_tx_stopped(&s->port))
+                        mxs_auart_stop_tx(&s->port);
+
+                if (i) {
+                        mxs_auart_dma_tx(s, i);
+                } else {
+                        clear_bit(MXS_AUART_DMA_TX_SYNC, &s->flags);
+                        smp_mb__after_clear_bit();
+                }
+                return;
+        }
+
+
         while (!(readl(s->port.membase + AUART_STAT) &
                  AUART_STAT_TXFF)) {
                 if (s->port.x_char) {
@@ -287,10 +439,159 @@ static u32 mxs_auart_get_mctrl(struct uart_port *u)
         return mctrl;
 }
 
+static bool mxs_auart_dma_filter(struct dma_chan *chan, void *param)
+{
+        struct mxs_auart_port *s = param;
+
+        if (!mxs_dma_is_apbx(chan))
+                return false;
+
+        if (s->dma_channel == chan->chan_id) {
+                chan->private = &s->dma_data;
+                return true;
+        }
+        return false;
+}
+
+static int mxs_auart_dma_prep_rx(struct mxs_auart_port *s);
+static void dma_rx_callback(void *arg)
+{
+        struct mxs_auart_port *s = (struct mxs_auart_port *) arg;
+        struct tty_struct *tty = s->port.state->port.tty;
+        int count;
+        u32 stat;
+
+        dma_unmap_sg(s->dev, &s->rx_sgl, 1, DMA_FROM_DEVICE);
+
+        stat = readl(s->port.membase + AUART_STAT);
+        stat &= ~(AUART_STAT_OERR | AUART_STAT_BERR |
+                        AUART_STAT_PERR | AUART_STAT_FERR);
+
+        count = stat & AUART_STAT_RXCOUNT_MASK;
+        tty_insert_flip_string(tty, s->rx_dma_buf, count);
+
+        writel(stat, s->port.membase + AUART_STAT);
+        tty_flip_buffer_push(tty);
+
+        /* start the next DMA for RX. */
+        mxs_auart_dma_prep_rx(s);
+}
+
+static int mxs_auart_dma_prep_rx(struct mxs_auart_port *s)
+{
+        struct dma_async_tx_descriptor *desc;
+        struct scatterlist *sgl = &s->rx_sgl;
+        struct dma_chan *channel = s->rx_dma_chan;
+        u32 pio[1];
+
+        /* [1] : send PIO */
+        pio[0] = AUART_CTRL0_RXTO_ENABLE
+                | AUART_CTRL0_RXTIMEOUT(0x80)
+                | AUART_CTRL0_XFER_COUNT(UART_XMIT_SIZE);
+        desc = dmaengine_prep_slave_sg(channel, (struct scatterlist *)pio,
+                                        1, DMA_TRANS_NONE, 0);
+        if (!desc) {
+                dev_err(s->dev, "step 1 error\n");
+                return -EINVAL;
+        }
+
+        /* [2] : send DMA request */
+        sg_init_one(sgl, s->rx_dma_buf, UART_XMIT_SIZE);
+        dma_map_sg(s->dev, sgl, 1, DMA_FROM_DEVICE);
+        desc = dmaengine_prep_slave_sg(channel, sgl, 1, DMA_DEV_TO_MEM,
+                                        DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+        if (!desc) {
+                dev_err(s->dev, "step 2 error\n");
+                return -1;
+        }
+
+        /* [3] : submit the DMA, but do not issue it. */
+        desc->callback = dma_rx_callback;
+        desc->callback_param = s;
+        dmaengine_submit(desc);
+        dma_async_issue_pending(channel);
+        return 0;
+}
+
+static void mxs_auart_dma_exit_channel(struct mxs_auart_port *s)
+{
+        if (s->tx_dma_chan) {
+                dma_release_channel(s->tx_dma_chan);
+                s->tx_dma_chan = NULL;
+        }
+        if (s->rx_dma_chan) {
+                dma_release_channel(s->rx_dma_chan);
+                s->rx_dma_chan = NULL;
+        }
+
+        kfree(s->tx_dma_buf);
+        kfree(s->rx_dma_buf);
+        s->tx_dma_buf = NULL;
+        s->rx_dma_buf = NULL;
+}
+
+static void mxs_auart_dma_exit(struct mxs_auart_port *s)
+{
+
+        writel(AUART_CTRL2_TXDMAE | AUART_CTRL2_RXDMAE | AUART_CTRL2_DMAONERR,
+                s->port.membase + AUART_CTRL2_CLR);
+
+        mxs_auart_dma_exit_channel(s);
+        s->flags &= ~MXS_AUART_DMA_ENABLED;
+        clear_bit(MXS_AUART_DMA_TX_SYNC, &s->flags);
+        clear_bit(MXS_AUART_DMA_RX_READY, &s->flags);
+}
+
+static int mxs_auart_dma_init(struct mxs_auart_port *s)
+{
+        dma_cap_mask_t mask;
+
+        if (auart_dma_enabled(s))
+                return 0;
+
+        /* We do not get the right DMA channels. */
+        if (s->dma_channel_rx == -1 || s->dma_channel_rx == -1)
+                return -EINVAL;
+
+        /* init for RX */
+        dma_cap_zero(mask);
+        dma_cap_set(DMA_SLAVE, mask);
+        s->dma_channel = s->dma_channel_rx;
+        s->dma_data.chan_irq = s->dma_irq_rx;
+        s->rx_dma_chan = dma_request_channel(mask, mxs_auart_dma_filter, s);
+        if (!s->rx_dma_chan)
+                goto err_out;
+        s->rx_dma_buf = kzalloc(UART_XMIT_SIZE, GFP_KERNEL | GFP_DMA);
+        if (!s->rx_dma_buf)
+                goto err_out;
+
+        /* init for TX */
+        s->dma_channel = s->dma_channel_tx;
+        s->dma_data.chan_irq = s->dma_irq_tx;
+        s->tx_dma_chan = dma_request_channel(mask, mxs_auart_dma_filter, s);
+        if (!s->tx_dma_chan)
+                goto err_out;
+        s->tx_dma_buf = kzalloc(UART_XMIT_SIZE, GFP_KERNEL | GFP_DMA);
+        if (!s->tx_dma_buf)
+                goto err_out;
+
+        /* set the flags */
+        s->flags |= MXS_AUART_DMA_ENABLED;
+        dev_dbg(s->dev, "enabled the DMA support.");
+
+        return 0;
+
+err_out:
+        mxs_auart_dma_exit_channel(s);
+        return -EINVAL;
+
+}
+
 static void mxs_auart_settermios(struct uart_port *u,
                                  struct ktermios *termios,
                                  struct ktermios *old)
 {
+        struct mxs_auart_port *s = to_auart_port(u);
         u32 bm, ctrl, ctrl2, div;
         unsigned int cflag, baud;
 
@@ -362,10 +663,23 @@ static void mxs_auart_settermios(struct uart_port *u,
                 ctrl |= AUART_LINECTRL_STP2;
 
         /* figure out the hardware flow control settings */
-        if (cflag & CRTSCTS)
+        if (cflag & CRTSCTS) {
+                /*
+                 * The DMA has a bug(see errata:2836) in mx23.
+                 * So we can not implement the DMA for auart in mx23,
+                 * we can only implement the DMA support for auart
+                 * in mx28.
+                 */
+                if (is_imx28_auart(s) && (s->flags & MXS_AUART_DMA_CONFIG)) {
+                        if (!mxs_auart_dma_init(s))
+                                /* enable DMA tranfer */
+                                ctrl2 |= AUART_CTRL2_TXDMAE | AUART_CTRL2_RXDMAE
+                                       | AUART_CTRL2_DMAONERR;
+                }
                 ctrl2 |= AUART_CTRL2_CTSEN | AUART_CTRL2_RTSEN;
-        else
+        } else {
                 ctrl2 &= ~(AUART_CTRL2_CTSEN | AUART_CTRL2_RTSEN);
+        }
 
         /* set baud rate */
         baud = uart_get_baud_rate(u, termios, old, 0, u->uartclk);
@@ -377,6 +691,19 @@ static void mxs_auart_settermios(struct uart_port *u,
         writel(ctrl2, u->membase + AUART_CTRL2);
 
         uart_update_timeout(u, termios->c_cflag, baud);
+
+        /* prepare for the DMA RX. */
+        if (auart_dma_enabled(s) &&
+                !test_and_set_bit(MXS_AUART_DMA_RX_READY, &s->flags)) {
+                if (!mxs_auart_dma_prep_rx(s)) {
+                        /* Disable the normal RX interrupt. */
+                        writel(AUART_INTR_RXIEN | AUART_INTR_RTIEN,
+                                        u->membase + AUART_INTR_CLR);
+                } else {
+                        mxs_auart_dma_exit(s);
+                        dev_err(s->dev, "We can not start up the DMA.\n");
+                }
+        }
 }
 
 static irqreturn_t mxs_auart_irq_handle(int irq, void *context)
@@ -395,7 +722,8 @@ static irqreturn_t mxs_auart_irq_handle(int irq, void *context)
         }
 
         if (istat & (AUART_INTR_RTIS | AUART_INTR_RXIS)) {
-                mxs_auart_rx_chars(s);
+                if (!auart_dma_enabled(s))
+                        mxs_auart_rx_chars(s);
                 istat &= ~(AUART_INTR_RTIS | AUART_INTR_RXIS);
         }
 
@@ -455,6 +783,9 @@ static void mxs_auart_shutdown(struct uart_port *u)
 {
         struct mxs_auart_port *s = to_auart_port(u);
 
+        if (auart_dma_enabled(s))
+                mxs_auart_dma_exit(s);
+
         writel(AUART_CTRL2_UARTEN, u->membase + AUART_CTRL2_CLR);
 
         writel(AUART_INTR_RXIEN | AUART_INTR_RTIEN | AUART_INTR_CTSMIEN,
@@ -688,6 +1019,7 @@ static int serial_mxs_probe_dt(struct mxs_auart_port *s,
                 struct platform_device *pdev)
 {
         struct device_node *np = pdev->dev.of_node;
+        u32 dma_channel[2];
         int ret;
 
         if (!np)
@@ -701,11 +1033,27 @@ static int serial_mxs_probe_dt(struct mxs_auart_port *s,
         }
         s->port.line = ret;
 
+        s->dma_irq_rx = platform_get_irq(pdev, 1);
+        s->dma_irq_tx = platform_get_irq(pdev, 2);
+
+        ret = of_property_read_u32_array(np, "fsl,auart-dma-channel",
+                                        dma_channel, 2);
+        if (ret == 0) {
+                s->dma_channel_rx = dma_channel[0];
+                s->dma_channel_tx = dma_channel[1];
+
+                s->flags |= MXS_AUART_DMA_CONFIG;
+        } else {
+                s->dma_channel_rx = -1;
+                s->dma_channel_tx = -1;
+        }
         return 0;
 }
 
-static int __devinit mxs_auart_probe(struct platform_device *pdev)
+static int mxs_auart_probe(struct platform_device *pdev)
 {
+        const struct of_device_id *of_id =
+                        of_match_device(mxs_auart_dt_ids, &pdev->dev);
         struct mxs_auart_port *s;
         u32 version;
         int ret = 0;
@@ -730,6 +1078,11 @@ static int __devinit mxs_auart_probe(struct platform_device *pdev)
                 goto out_free;
         }
 
+        if (of_id) {
+                pdev->id_entry = of_id->data;
+                s->devtype = pdev->id_entry->driver_data;
+        }
+
         s->clk = clk_get(&pdev->dev, NULL);
         if (IS_ERR(s->clk)) {
                 ret = PTR_ERR(s->clk);
@@ -751,7 +1104,6 @@ static int __devinit mxs_auart_probe(struct platform_device *pdev)
         s->port.type = PORT_IMX;
         s->port.dev = s->dev = get_device(&pdev->dev);
 
-        s->flags = 0;
         s->ctrl = 0;
 
         s->irq = platform_get_irq(pdev, 0);
@@ -789,7 +1141,7 @@ out:
         return ret;
 }
 
-static int __devexit mxs_auart_remove(struct platform_device *pdev)
+static int mxs_auart_remove(struct platform_device *pdev)
 {
         struct mxs_auart_port *s = platform_get_drvdata(pdev);
 
@@ -805,15 +1157,9 @@ static int __devexit mxs_auart_remove(struct platform_device *pdev)
         return 0;
 }
 
-static struct of_device_id mxs_auart_dt_ids[] = {
-        { .compatible = "fsl,imx23-auart", },
-        { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, mxs_auart_dt_ids);
-
 static struct platform_driver mxs_auart_driver = {
         .probe = mxs_auart_probe,
-        .remove = __devexit_p(mxs_auart_remove),
+        .remove = mxs_auart_remove,
         .driver = {
                 .name = "mxs-auart",
                 .owner = THIS_MODULE,
diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c
index df443b908ca3..e7cae1c2d7d2 100644
--- a/drivers/tty/serial/of_serial.c
+++ b/drivers/tty/serial/of_serial.c
@@ -21,8 +21,10 @@
 #include <linux/of_serial.h>
 #include <linux/of_platform.h>
 #include <linux/nwpserial.h>
+#include <linux/clk.h>
 
 struct of_serial_info {
+        struct clk *clk;
         int type;
         int line;
 };
@@ -50,8 +52,9 @@ EXPORT_SYMBOL_GPL(tegra_serial_handle_break);
 /*
  * Fill a struct uart_port for a given device node
  */
-static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
-                                        int type, struct uart_port *port)
+static int of_platform_serial_setup(struct platform_device *ofdev,
+                        int type, struct uart_port *port,
+                        struct of_serial_info *info)
 {
         struct resource resource;
         struct device_node *np = ofdev->dev.of_node;
@@ -60,8 +63,17 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
 
         memset(port, 0, sizeof *port);
         if (of_property_read_u32(np, "clock-frequency", &clk)) {
-                dev_warn(&ofdev->dev, "no clock-frequency property set\n");
-                return -ENODEV;
+
+                /* Get clk rate through clk driver if present */
+                info->clk = clk_get(&ofdev->dev, NULL);
+                if (IS_ERR(info->clk)) {
+                        dev_warn(&ofdev->dev,
+                                "clk or clock-frequency not defined\n");
+                        return PTR_ERR(info->clk);
+                }
+
+                clk_prepare_enable(info->clk);
+                clk = clk_get_rate(info->clk);
         }
         /* If current-speed was set, then try not to change it. */
         if (of_property_read_u32(np, "current-speed", &spd) == 0)
@@ -70,7 +82,7 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
         ret = of_address_to_resource(np, 0, &resource);
         if (ret) {
                 dev_warn(&ofdev->dev, "invalid address\n");
-                return ret;
+                goto out;
         }
 
         spin_lock_init(&port->lock);
@@ -97,7 +109,8 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
                 default:
                         dev_warn(&ofdev->dev, "unsupported reg-io-width (%d)\n",
                                  prop);
-                        return -EINVAL;
+                        ret = -EINVAL;
+                        goto out;
                 }
         }
 
@@ -115,13 +128,17 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev,
                 port->handle_break = tegra_serial_handle_break;
 
         return 0;
+out:
+        if (info->clk)
+                clk_disable_unprepare(info->clk);
+        return ret;
 }
 
 /*
  * Try to register a serial port
  */
 static struct of_device_id of_platform_serial_table[];
-static int __devinit of_platform_serial_probe(struct platform_device *ofdev)
+static int of_platform_serial_probe(struct platform_device *ofdev)
 {
         const struct of_device_id *match;
         struct of_serial_info *info;
@@ -141,7 +158,7 @@ static int __devinit of_platform_serial_probe(struct platform_device *ofdev)
                 return -ENOMEM;
 
         port_type = (unsigned long)match->data;
-        ret = of_platform_serial_setup(ofdev, port_type, &port);
+        ret = of_platform_serial_setup(ofdev, port_type, &port, info);
         if (ret)
                 goto out;
 
@@ -204,6 +221,9 @@ static int of_platform_serial_remove(struct platform_device *ofdev)
                 /* need to add code for these */
                 break;
         }
+
+        if (info->clk)
+                clk_disable_unprepare(info->clk);
         kfree(info);
         return 0;
 }
@@ -211,7 +231,7 @@ static int of_platform_serial_remove(struct platform_device *ofdev)
 /*
  * A few common types, add more as needed.
  */
-static struct of_device_id __devinitdata of_platform_serial_table[] = {
+static struct of_device_id of_platform_serial_table[] = {
         { .compatible = "ns8250",   .data = (void *)PORT_8250, },
         { .compatible = "ns16450",  .data = (void *)PORT_16450, },
         { .compatible = "ns16550a", .data = (void *)PORT_16550A, },
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 6d3d26a607b9..b538e2e4ae5b 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -96,7 +96,7 @@ struct uart_omap_port {
         unsigned char           msr_saved_flags;
         char                    name[20];
         unsigned long           port_activity;
-        u32                     context_loss_cnt;
+        int                     context_loss_cnt;
         u32                     errata;
         u8                      wakeups_enabled;
         unsigned int            irq_pending:1;
@@ -702,11 +702,7 @@ serial_omap_configure_xonxoff
         serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR);
         serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
         serial_out(up, UART_TI752_TCR, OMAP_UART_TCR_TRIG);
-        /* Enable special char function UARTi.EFR_REG[5] and
-         * load the new software flow control mode IXON or IXOFF
-         * and restore the UARTi.EFR_REG[4] ENHANCED_EN value.
-         */
-        serial_out(up, UART_EFR, up->efr | UART_EFR_SCD);
+
         serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A);
 
         serial_out(up, UART_MCR, up->mcr & ~UART_MCR_TCRTLR);
@@ -1081,7 +1077,7 @@ out:
 
 #ifdef CONFIG_SERIAL_OMAP_CONSOLE
 
-static struct uart_omap_port *serial_omap_console_ports[4];
+static struct uart_omap_port *serial_omap_console_ports[OMAP_MAX_HSUART_PORTS];
 
 static struct uart_driver serial_omap_reg;
 
@@ -1242,7 +1238,7 @@ static int serial_omap_resume(struct device *dev)
 }
 #endif
 
-static void __devinit omap_serial_fill_features_erratas(struct uart_omap_port *up)
+static void omap_serial_fill_features_erratas(struct uart_omap_port *up)
 {
         u32 mvr, scheme;
         u16 revision, major, minor;
@@ -1295,7 +1291,7 @@ static void __devinit omap_serial_fill_features_erratas(struct uart_omap_port *u
         }
 }
 
-static __devinit struct omap_uart_port_info *of_get_uart_port_info(struct device *dev)
+static struct omap_uart_port_info *of_get_uart_port_info(struct device *dev)
 {
         struct omap_uart_port_info *omap_up_info;
 
@@ -1308,7 +1304,7 @@ static __devinit struct omap_uart_port_info *of_get_uart_port_info(struct device
         return omap_up_info;
 }
 
-static int __devinit serial_omap_probe(struct platform_device *pdev)
+static int serial_omap_probe(struct platform_device *pdev)
 {
         struct uart_omap_port   *up;
         struct resource         *mem, *irq;
@@ -1445,7 +1441,7 @@ err_port_line:
         return ret;
 }
 
-static int __devexit serial_omap_remove(struct platform_device *dev)
+static int serial_omap_remove(struct platform_device *dev)
 {
         struct uart_omap_port *up = platform_get_drvdata(dev);
 
@@ -1556,11 +1552,15 @@ static int serial_omap_runtime_resume(struct device *dev)
 {
         struct uart_omap_port *up = dev_get_drvdata(dev);
 
-        u32 loss_cnt = serial_omap_get_context_loss_count(up);
+        int loss_cnt = serial_omap_get_context_loss_count(up);
 
-        if (up->context_loss_cnt != loss_cnt)
+        if (loss_cnt < 0) {
+                dev_err(dev, "serial_omap_get_context_loss_count failed : %d\n",
+                        loss_cnt);
                 serial_omap_restore_context(up);
-
+        } else if (up->context_loss_cnt != loss_cnt) {
+                serial_omap_restore_context(up);
+        }
         up->latency = up->calc_latency;
         schedule_work(&up->qos_work);
 
@@ -1586,7 +1586,7 @@ MODULE_DEVICE_TABLE(of, omap_serial_of_match);
 
 static struct platform_driver serial_omap_driver = {
         .probe          = serial_omap_probe,
-        .remove         = __devexit_p(serial_omap_remove),
+        .remove         = serial_omap_remove,
         .driver         = {
                 .name   = DRIVER_NAME,
                 .pm     = &serial_omap_dev_pm_ops,
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 4cd6c2381528..8318925fbf6b 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -1839,7 +1839,7 @@ static DEFINE_PCI_DEVICE_TABLE(pch_uart_pci_id) = {
         {0,},
 };
 
-static int __devinit pch_uart_pci_probe(struct pci_dev *pdev,
+static int pch_uart_pci_probe(struct pci_dev *pdev,
                                         const struct pci_device_id *id)
 {
         int ret;
@@ -1869,7 +1869,7 @@ static struct pci_driver pch_uart_pci_driver = {
         .name = "pch_uart",
         .id_table = pch_uart_pci_id,
         .probe = pch_uart_pci_probe,
-        .remove = __devexit_p(pch_uart_pci_remove),
+        .remove = pch_uart_pci_remove,
         .suspend = pch_uart_pci_suspend,
         .resume = pch_uart_pci_resume,
 };
diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c
index 9033fc6e0e4e..2764828251f5 100644
--- a/drivers/tty/serial/pxa.c
+++ b/drivers/tty/serial/pxa.c
@@ -705,6 +705,57 @@ serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
         clk_disable_unprepare(up->clk);
 }
 
+#ifdef CONFIG_CONSOLE_POLL
+/*
+ * Console polling routines for writing and reading from the uart while
+ * in an interrupt or debug context.
+ */
+
+static int serial_pxa_get_poll_char(struct uart_port *port)
+{
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+        unsigned char lsr = serial_in(up, UART_LSR);
+
+        while (!(lsr & UART_LSR_DR))
+                lsr = serial_in(up, UART_LSR);
+
+        return serial_in(up, UART_RX);
+}
+
+
+static void serial_pxa_put_poll_char(struct uart_port *port,
+                         unsigned char c)
+{
+        unsigned int ier;
+        struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+
+        /*
+         *      First save the IER then disable the interrupts
+         */
+        ier = serial_in(up, UART_IER);
+        serial_out(up, UART_IER, UART_IER_UUE);
+
+        wait_for_xmitr(up);
+        /*
+         *      Send the character out.
+         *      If a LF, also do CR...
+         */
+        serial_out(up, UART_TX, c);
+        if (c == 10) {
+                wait_for_xmitr(up);
+                serial_out(up, UART_TX, 13);
+        }
+
+        /*
+         *      Finally, wait for transmitter to become empty
+         *      and restore the IER
+         */
+        wait_for_xmitr(up);
+        serial_out(up, UART_IER, ier);
+}
+
+#endif /* CONFIG_CONSOLE_POLL */
+
 static int __init
 serial_pxa_console_setup(struct console *co, char *options)
 {
@@ -759,6 +810,10 @@ struct uart_ops serial_pxa_pops = {
         .request_port   = serial_pxa_request_port,
         .config_port    = serial_pxa_config_port,
         .verify_port    = serial_pxa_verify_port,
+#ifdef CONFIG_CONSOLE_POLL
+        .poll_get_char = serial_pxa_get_poll_char,
+        .poll_put_char = serial_pxa_put_poll_char,
+#endif
 };
 
 static struct uart_driver serial_pxa_reg = {
diff --git a/drivers/tty/serial/sa1100.c b/drivers/tty/serial/sa1100.c
index 2ca5959ec3fa..da56c8a0fdc9 100644
--- a/drivers/tty/serial/sa1100.c
+++ b/drivers/tty/serial/sa1100.c
@@ -637,7 +637,7 @@ static void __init sa1100_init_ports(void)
         PPSR |= PPC_TXD1 | PPC_TXD3;
 }
 
-void __devinit sa1100_register_uart_fns(struct sa1100_port_fns *fns)
+void sa1100_register_uart_fns(struct sa1100_port_fns *fns)
 {
         if (fns->get_mctrl)
                 sa1100_pops.get_mctrl = fns->get_mctrl;
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index 7f04717176aa..fb0e0f0bed0e 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -223,8 +223,11 @@ s3c24xx_serial_rx_chars(int irq, void *dev_id)
         struct uart_port *port = &ourport->port;
         struct tty_struct *tty = port->state->port.tty;
         unsigned int ufcon, ch, flag, ufstat, uerstat;
+        unsigned long flags;
         int max_count = 64;
 
+        spin_lock_irqsave(&port->lock, flags);
+
         while (max_count-- > 0) {
                 ufcon = rd_regl(port, S3C2410_UFCON);
                 ufstat = rd_regl(port, S3C2410_UFSTAT);
@@ -299,6 +302,7 @@ s3c24xx_serial_rx_chars(int irq, void *dev_id)
         tty_flip_buffer_push(tty);
 
  out:
+        spin_unlock_irqrestore(&port->lock, flags);
         return IRQ_HANDLED;
 }
 
@@ -307,8 +311,11 @@ static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id)
         struct s3c24xx_uart_port *ourport = id;
         struct uart_port *port = &ourport->port;
         struct circ_buf *xmit = &port->state->xmit;
+        unsigned long flags;
         int count = 256;
 
+        spin_lock_irqsave(&port->lock, flags);
+
         if (port->x_char) {
                 wr_regb(port, S3C2410_UTXH, port->x_char);
                 port->icount.tx++;
@@ -336,13 +343,17 @@ static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id)
                 port->icount.tx++;
         }
 
-        if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+        if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) {
+                spin_unlock(&port->lock);
                 uart_write_wakeup(port);
+                spin_lock(&port->lock);
+        }
 
         if (uart_circ_empty(xmit))
                 s3c24xx_serial_stop_tx(port);
 
  out:
+        spin_unlock_irqrestore(&port->lock, flags);
         return IRQ_HANDLED;
 }
 
@@ -352,10 +363,8 @@ static irqreturn_t s3c64xx_serial_handle_irq(int irq, void *id)
         struct s3c24xx_uart_port *ourport = id;
         struct uart_port *port = &ourport->port;
         unsigned int pend = rd_regl(port, S3C64XX_UINTP);
-        unsigned long flags;
         irqreturn_t ret = IRQ_HANDLED;
 
-        spin_lock_irqsave(&port->lock, flags);
         if (pend & S3C64XX_UINTM_RXD_MSK) {
                 ret = s3c24xx_serial_rx_chars(irq, id);
                 wr_regl(port, S3C64XX_UINTP, S3C64XX_UINTM_RXD_MSK);
@@ -364,7 +373,6 @@ static irqreturn_t s3c64xx_serial_handle_irq(int irq, void *id)
                 ret = s3c24xx_serial_tx_chars(irq, id);
                 wr_regl(port, S3C64XX_UINTP, S3C64XX_UINTM_TXD_MSK);
         }
-        spin_unlock_irqrestore(&port->lock, flags);
         return ret;
 }
 
@@ -530,16 +538,16 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level,
         switch (level) {
         case 3:
                 if (!IS_ERR(ourport->baudclk))
-                        clk_disable(ourport->baudclk);
+                        clk_disable_unprepare(ourport->baudclk);
 
-                clk_disable(ourport->clk);
+                clk_disable_unprepare(ourport->clk);
                 break;
 
         case 0:
-                clk_enable(ourport->clk);
+                clk_prepare_enable(ourport->clk);
 
                 if (!IS_ERR(ourport->baudclk))
-                        clk_enable(ourport->baudclk);
+                        clk_prepare_enable(ourport->baudclk);
 
                 break;
         default:
@@ -713,11 +721,11 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
                 s3c24xx_serial_setsource(port, clk_sel);
 
                 if (!IS_ERR(ourport->baudclk)) {
-                        clk_disable(ourport->baudclk);
+                        clk_disable_unprepare(ourport->baudclk);
                         ourport->baudclk = ERR_PTR(-EINVAL);
                 }
 
-                clk_enable(clk);
+                clk_prepare_enable(clk);
 
                 ourport->baudclk = clk;
                 ourport->baudclk_rate = clk ? clk_get_rate(clk) : 0;
@@ -1256,7 +1264,7 @@ static int s3c24xx_serial_probe(struct platform_device *pdev)
         return ret;
 }
 
-static int __devexit s3c24xx_serial_remove(struct platform_device *dev)
+static int s3c24xx_serial_remove(struct platform_device *dev)
 {
         struct uart_port *port = s3c24xx_dev_to_port(&dev->dev);
 
@@ -1287,9 +1295,9 @@ static int s3c24xx_serial_resume(struct device *dev)
         struct s3c24xx_uart_port *ourport = to_ourport(port);
 
         if (port) {
-                clk_enable(ourport->clk);
+                clk_prepare_enable(ourport->clk);
                 s3c24xx_serial_resetport(port, s3c24xx_port_to_cfg(port));
-                clk_disable(ourport->clk);
+                clk_disable_unprepare(ourport->clk);
 
                 uart_resume_port(&s3c24xx_uart_drv, port);
         }
@@ -1701,6 +1709,16 @@ MODULE_DEVICE_TABLE(platform, s3c24xx_serial_driver_ids);
 
 #ifdef CONFIG_OF
 static const struct of_device_id s3c24xx_uart_dt_match[] = {
+        { .compatible = "samsung,s3c2410-uart",
+                .data = (void *)S3C2410_SERIAL_DRV_DATA },
+        { .compatible = "samsung,s3c2412-uart",
+                .data = (void *)S3C2412_SERIAL_DRV_DATA },
+        { .compatible = "samsung,s3c2440-uart",
+                .data = (void *)S3C2440_SERIAL_DRV_DATA },
+        { .compatible = "samsung,s3c6400-uart",
+                .data = (void *)S3C6400_SERIAL_DRV_DATA },
+        { .compatible = "samsung,s5pv210-uart",
+                .data = (void *)S5PV210_SERIAL_DRV_DATA },
         { .compatible = "samsung,exynos4210-uart",
                 .data = (void *)EXYNOS4210_SERIAL_DRV_DATA },
         {},
@@ -1712,7 +1730,7 @@ MODULE_DEVICE_TABLE(of, s3c24xx_uart_dt_match);
 
 static struct platform_driver samsung_serial_driver = {
         .probe          = s3c24xx_serial_probe,
-        .remove         = __devexit_p(s3c24xx_serial_remove),
+        .remove         = s3c24xx_serial_remove,
         .id_table       = s3c24xx_serial_driver_ids,
         .driver         = {
                 .name   = "samsung-uart",
diff --git a/drivers/tty/serial/sc26xx.c b/drivers/tty/serial/sc26xx.c
index 9d664242b312..aced1dd923d8 100644
--- a/drivers/tty/serial/sc26xx.c
+++ b/drivers/tty/serial/sc26xx.c
@@ -621,7 +621,7 @@ static u8 sc26xx_flags2mask(unsigned int flags, unsigned int bitpos)
         return bit ? (1 << (bit - 1)) : 0;
 }
 
-static void __devinit sc26xx_init_masks(struct uart_sc26xx_port *up,
+static void sc26xx_init_masks(struct uart_sc26xx_port *up,
                                         int line, unsigned int data)
 {
         up->dtr_mask[line] = sc26xx_flags2mask(data,  0);
@@ -632,7 +632,7 @@ static void __devinit sc26xx_init_masks(struct uart_sc26xx_port *up,
         up->ri_mask[line]  = sc26xx_flags2mask(data, 20);
 }
 
-static int __devinit sc26xx_probe(struct platform_device *dev)
+static int sc26xx_probe(struct platform_device *dev)
 {
         struct resource *res;
         struct uart_sc26xx_port *up;
@@ -733,7 +733,7 @@ static int __exit sc26xx_driver_remove(struct platform_device *dev)
 
 static struct platform_driver sc26xx_driver = {
         .probe  = sc26xx_probe,
-        .remove = __devexit_p(sc26xx_driver_remove),
+        .remove = sc26xx_driver_remove,
         .driver = {
                 .name   = "SC26xx",
                 .owner  = THIS_MODULE,
diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c
index e821068cd95b..418b495e3233 100644
--- a/drivers/tty/serial/sccnxp.c
+++ b/drivers/tty/serial/sccnxp.c
@@ -740,7 +740,7 @@ static int sccnxp_console_setup(struct console *co, char *options)
 }
 #endif
 
-static int __devinit sccnxp_probe(struct platform_device *pdev)
+static int sccnxp_probe(struct platform_device *pdev)
 {
         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         int chiptype = pdev->id_entry->driver_data;
@@ -943,7 +943,7 @@ err_out:
         return ret;
 }
 
-static int __devexit sccnxp_remove(struct platform_device *pdev)
+static int sccnxp_remove(struct platform_device *pdev)
 {
         int i;
         struct sccnxp_port *s = platform_get_drvdata(pdev);
@@ -981,7 +981,7 @@ static struct platform_driver sccnxp_uart_driver = {
                 .owner  = THIS_MODULE,
         },
         .probe          = sccnxp_probe,
-        .remove         = __devexit_p(sccnxp_remove),
+        .remove         = sccnxp_remove,
         .id_table       = sccnxp_id_table,
 };
 module_platform_driver(sccnxp_uart_driver);
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 0fcfd98a9566..fb5aa42fde7e 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -634,10 +634,10 @@ static void uart_unthrottle(struct tty_struct *tty)
                 uart_set_mctrl(port, TIOCM_RTS);
 }
 
-static void uart_get_info(struct tty_port *port,
-                        struct uart_state *state,
+static void do_uart_get_info(struct tty_port *port,
                         struct serial_struct *retinfo)
 {
+        struct uart_state *state = container_of(port, struct uart_state, port);
         struct uart_port *uport = state->uart_port;
 
         memset(retinfo, 0, sizeof(*retinfo));
@@ -662,17 +662,21 @@ static void uart_get_info(struct tty_port *port,
         retinfo->iomem_base      = (void *)(unsigned long)uport->mapbase;
 }
 
-static int uart_get_info_user(struct uart_state *state,
-                         struct serial_struct __user *retinfo)
+static void uart_get_info(struct tty_port *port,
+                        struct serial_struct *retinfo)
 {
-        struct tty_port *port = &state->port;
-        struct serial_struct tmp;
-
         /* Ensure the state we copy is consistent and no hardware changes
            occur as we go */
         mutex_lock(&port->mutex);
-        uart_get_info(port, state, &tmp);
+        do_uart_get_info(port, retinfo);
         mutex_unlock(&port->mutex);
+}
+
+static int uart_get_info_user(struct tty_port *port,
+                         struct serial_struct __user *retinfo)
+{
+        struct serial_struct tmp;
+        uart_get_info(port, &tmp);
 
         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
                 return -EFAULT;
@@ -1131,7 +1135,7 @@ uart_ioctl(struct tty_struct *tty, unsigned int cmd,
          */
         switch (cmd) {
         case TIOCGSERIAL:
-                ret = uart_get_info_user(state, uarg);
+                ret = uart_get_info_user(port, uarg);
                 break;
 
         case TIOCSSERIAL:
@@ -2293,6 +2297,8 @@ int uart_register_driver(struct uart_driver *drv)
         if (retval >= 0)
                 return retval;
 
+        for (i = 0; i < drv->nr; i++)
+                tty_port_destroy(&drv->state[i].port);
         put_tty_driver(normal);
 out_kfree:
         kfree(drv->state);
@@ -2312,8 +2318,12 @@ out:
 void uart_unregister_driver(struct uart_driver *drv)
 {
         struct tty_driver *p = drv->tty_driver;
+        unsigned int i;
+
         tty_unregister_driver(p);
         put_tty_driver(p);
+        for (i = 0; i < drv->nr; i++)
+                tty_port_destroy(&drv->state[i].port);
         kfree(drv->state);
         drv->state = NULL;
         drv->tty_driver = NULL;
@@ -2329,21 +2339,166 @@ struct tty_driver *uart_console_device(struct console *co, int *index)
 static ssize_t uart_get_attr_uartclk(struct device *dev,
         struct device_attribute *attr, char *buf)
 {
-        int ret;
+        struct serial_struct tmp;
         struct tty_port *port = dev_get_drvdata(dev);
-        struct uart_state *state = container_of(port, struct uart_state, port);
 
-        mutex_lock(&state->port.mutex);
-        ret = snprintf(buf, PAGE_SIZE, "%d\n", state->uart_port->uartclk);
-        mutex_unlock(&state->port.mutex);
+        uart_get_info(port, &tmp);
+        return snprintf(buf, PAGE_SIZE, "%d\n", tmp.baud_base * 16);
+}
 
-        return ret;
+static ssize_t uart_get_attr_type(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct serial_struct tmp;
+        struct tty_port *port = dev_get_drvdata(dev);
+
+        uart_get_info(port, &tmp);
+        return snprintf(buf, PAGE_SIZE, "%d\n", tmp.type);
+}
+static ssize_t uart_get_attr_line(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct serial_struct tmp;
+        struct tty_port *port = dev_get_drvdata(dev);
+
+        uart_get_info(port, &tmp);
+        return snprintf(buf, PAGE_SIZE, "%d\n", tmp.line);
+}
+
+static ssize_t uart_get_attr_port(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct serial_struct tmp;
+        struct tty_port *port = dev_get_drvdata(dev);
+        unsigned long ioaddr;
+
+        uart_get_info(port, &tmp);
+        ioaddr = tmp.port;
+        if (HIGH_BITS_OFFSET)
+                ioaddr |= (unsigned long)tmp.port_high << HIGH_BITS_OFFSET;
+        return snprintf(buf, PAGE_SIZE, "0x%lX\n", ioaddr);
 }
 
+static ssize_t uart_get_attr_irq(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct serial_struct tmp;
+        struct tty_port *port = dev_get_drvdata(dev);
+
+        uart_get_info(port, &tmp);
+        return snprintf(buf, PAGE_SIZE, "%d\n", tmp.irq);
+}
+
+static ssize_t uart_get_attr_flags(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct serial_struct tmp;
+        struct tty_port *port = dev_get_drvdata(dev);
+
+        uart_get_info(port, &tmp);
+        return snprintf(buf, PAGE_SIZE, "0x%X\n", tmp.flags);
+}
+
+static ssize_t uart_get_attr_xmit_fifo_size(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct serial_struct tmp;
+        struct tty_port *port = dev_get_drvdata(dev);
+
+        uart_get_info(port, &tmp);
+        return snprintf(buf, PAGE_SIZE, "%d\n", tmp.xmit_fifo_size);
+}
+
+
+static ssize_t uart_get_attr_close_delay(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct serial_struct tmp;
+        struct tty_port *port = dev_get_drvdata(dev);
+
+        uart_get_info(port, &tmp);
+        return snprintf(buf, PAGE_SIZE, "%d\n", tmp.close_delay);
+}
+
+
+static ssize_t uart_get_attr_closing_wait(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct serial_struct tmp;
+        struct tty_port *port = dev_get_drvdata(dev);
+
+        uart_get_info(port, &tmp);
+        return snprintf(buf, PAGE_SIZE, "%d\n", tmp.closing_wait);
+}
+
+static ssize_t uart_get_attr_custom_divisor(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct serial_struct tmp;
+        struct tty_port *port = dev_get_drvdata(dev);
+
+        uart_get_info(port, &tmp);
+        return snprintf(buf, PAGE_SIZE, "%d\n", tmp.custom_divisor);
+}
+
+static ssize_t uart_get_attr_io_type(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct serial_struct tmp;
+        struct tty_port *port = dev_get_drvdata(dev);
+
+        uart_get_info(port, &tmp);
+        return snprintf(buf, PAGE_SIZE, "%d\n", tmp.io_type);
+}
+
+static ssize_t uart_get_attr_iomem_base(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct serial_struct tmp;
+        struct tty_port *port = dev_get_drvdata(dev);
+
+        uart_get_info(port, &tmp);
+        return snprintf(buf, PAGE_SIZE, "0x%lX\n", (unsigned long)tmp.iomem_base);
+}
+
+static ssize_t uart_get_attr_iomem_reg_shift(struct device *dev,
+        struct device_attribute *attr, char *buf)
+{
+        struct serial_struct tmp;
+        struct tty_port *port = dev_get_drvdata(dev);
+
+        uart_get_info(port, &tmp);
+        return snprintf(buf, PAGE_SIZE, "%d\n", tmp.iomem_reg_shift);
+}
+
+static DEVICE_ATTR(type, S_IRUSR | S_IRGRP, uart_get_attr_type, NULL);
+static DEVICE_ATTR(line, S_IRUSR | S_IRGRP, uart_get_attr_line, NULL);
+static DEVICE_ATTR(port, S_IRUSR | S_IRGRP, uart_get_attr_port, NULL);
+static DEVICE_ATTR(irq, S_IRUSR | S_IRGRP, uart_get_attr_irq, NULL);
+static DEVICE_ATTR(flags, S_IRUSR | S_IRGRP, uart_get_attr_flags, NULL);
+static DEVICE_ATTR(xmit_fifo_size, S_IRUSR | S_IRGRP, uart_get_attr_xmit_fifo_size, NULL);
 static DEVICE_ATTR(uartclk, S_IRUSR | S_IRGRP, uart_get_attr_uartclk, NULL);
+static DEVICE_ATTR(close_delay, S_IRUSR | S_IRGRP, uart_get_attr_close_delay, NULL);
+static DEVICE_ATTR(closing_wait, S_IRUSR | S_IRGRP, uart_get_attr_closing_wait, NULL);
+static DEVICE_ATTR(custom_divisor, S_IRUSR | S_IRGRP, uart_get_attr_custom_divisor, NULL);
+static DEVICE_ATTR(io_type, S_IRUSR | S_IRGRP, uart_get_attr_io_type, NULL);
+static DEVICE_ATTR(iomem_base, S_IRUSR | S_IRGRP, uart_get_attr_iomem_base, NULL);
+static DEVICE_ATTR(iomem_reg_shift, S_IRUSR | S_IRGRP, uart_get_attr_iomem_reg_shift, NULL);
 
 static struct attribute *tty_dev_attrs[] = {
+        &dev_attr_type.attr,
+        &dev_attr_line.attr,
+        &dev_attr_port.attr,
+        &dev_attr_irq.attr,
+        &dev_attr_flags.attr,
+        &dev_attr_xmit_fifo_size.attr,
         &dev_attr_uartclk.attr,
+        &dev_attr_close_delay.attr,
+        &dev_attr_closing_wait.attr,
+        &dev_attr_custom_divisor.attr,
+        &dev_attr_io_type.attr,
+        &dev_attr_iomem_base.attr,
+        &dev_attr_iomem_reg_shift.attr,
         NULL,
         };
 
@@ -2356,6 +2511,7 @@ static const struct attribute_group *tty_dev_attr_groups[] = {
         NULL
         };
 
+
 /**
  *      uart_add_one_port - attach a driver-defined port structure
  *      @drv: pointer to the uart low level driver structure for this port
diff --git a/drivers/tty/serial/serial_txx9.c b/drivers/tty/serial/serial_txx9.c
index 6ae2a58d62f2..b52b21aeb250 100644
--- a/drivers/tty/serial/serial_txx9.c
+++ b/drivers/tty/serial/serial_txx9.c
@@ -1030,7 +1030,7 @@ static DEFINE_MUTEX(serial_txx9_mutex);
  *
  *      On success the port is ready to use and the line number is returned.
  */
-static int __devinit serial_txx9_register_port(struct uart_port *port)
+static int serial_txx9_register_port(struct uart_port *port)
 {
         int i;
         struct uart_txx9_port *uart;
@@ -1078,7 +1078,7 @@ static int __devinit serial_txx9_register_port(struct uart_port *port)
  *      Remove one serial port.  This may not be called from interrupt
  *      context.  We hand the port back to the our control.
  */
-static void __devexit serial_txx9_unregister_port(int line)
+static void serial_txx9_unregister_port(int line)
 {
         struct uart_txx9_port *uart = &serial_txx9_ports[line];
 
@@ -1096,7 +1096,7 @@ static void __devexit serial_txx9_unregister_port(int line)
 /*
  * Register a set of serial devices attached to a platform device.
  */
-static int __devinit serial_txx9_probe(struct platform_device *dev)
+static int serial_txx9_probe(struct platform_device *dev)
 {
         struct uart_port *p = dev->dev.platform_data;
         struct uart_port port;
@@ -1126,7 +1126,7 @@ static int __devinit serial_txx9_probe(struct platform_device *dev)
 /*
  * Remove serial ports registered against a platform device.
  */
-static int __devexit serial_txx9_remove(struct platform_device *dev)
+static int serial_txx9_remove(struct platform_device *dev)
 {
         int i;
 
@@ -1171,7 +1171,7 @@ static int serial_txx9_resume(struct platform_device *dev)
 
 static struct platform_driver serial_txx9_plat_driver = {
         .probe          = serial_txx9_probe,
-        .remove         = __devexit_p(serial_txx9_remove),
+        .remove         = serial_txx9_remove,
 #ifdef CONFIG_PM
         .suspend        = serial_txx9_suspend,
         .resume         = serial_txx9_resume,
@@ -1187,7 +1187,7 @@ static struct platform_driver serial_txx9_plat_driver = {
  * Probe one serial board.  Unfortunately, there is no rhyme nor reason
  * to the arrangement of serial ports on a PCI card.
  */
-static int __devinit
+static int
 pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
 {
         struct uart_port port;
@@ -1217,7 +1217,7 @@ pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
         return 0;
 }
 
-static void __devexit pciserial_txx9_remove_one(struct pci_dev *dev)
+static void pciserial_txx9_remove_one(struct pci_dev *dev)
 {
         struct uart_txx9_port *up = pci_get_drvdata(dev);
 
@@ -1261,7 +1261,7 @@ static const struct pci_device_id serial_txx9_pci_tbl[] = {
 static struct pci_driver serial_txx9_pci_driver = {
         .name           = "serial_txx9",
         .probe          = pciserial_txx9_init_one,
-        .remove         = __devexit_p(pciserial_txx9_remove_one),
+        .remove         = pciserial_txx9_remove_one,
 #ifdef CONFIG_PM
         .suspend        = pciserial_txx9_suspend_one,
         .resume         = pciserial_txx9_resume_one,
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 6ee59001d61d..61477567423f 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -99,12 +99,6 @@ struct sci_port {
 #endif
 
         struct notifier_block           freq_transition;
-
-#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
-        unsigned short saved_smr;
-        unsigned short saved_fcr;
-        unsigned char saved_brr;
-#endif
 };
 
 /* Function prototypes */
@@ -202,9 +196,9 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = {
                 [SCxSR]         = { 0x14, 16 },
                 [SCxRDR]        = { 0x60,  8 },
                 [SCFCR]         = { 0x18, 16 },
-                [SCFDR]         = { 0x1c, 16 },
-                [SCTFDR]        = sci_reg_invalid,
-                [SCRFDR]        = sci_reg_invalid,
+                [SCFDR]         = sci_reg_invalid,
+                [SCTFDR]        = { 0x38, 16 },
+                [SCRFDR]        = { 0x3c, 16 },
                 [SCSPTR]        = sci_reg_invalid,
                 [SCLSR]         = sci_reg_invalid,
         },
@@ -491,7 +485,7 @@ static int sci_txfill(struct uart_port *port)
 
         reg = sci_getreg(port, SCTFDR);
         if (reg->size)
-                return serial_port_in(port, SCTFDR) & 0xff;
+                return serial_port_in(port, SCTFDR) & ((port->fifosize << 1) - 1);
 
         reg = sci_getreg(port, SCFDR);
         if (reg->size)
@@ -511,7 +505,7 @@ static int sci_rxfill(struct uart_port *port)
 
         reg = sci_getreg(port, SCRFDR);
         if (reg->size)
-                return serial_port_in(port, SCRFDR) & 0xff;
+                return serial_port_in(port, SCRFDR) & ((port->fifosize << 1) - 1);
 
         reg = sci_getreg(port, SCFDR);
         if (reg->size)
@@ -1132,7 +1126,7 @@ static const char *sci_gpio_str(unsigned int index)
         return sci_gpio_names[index];
 }
 
-static void __devinit sci_init_gpios(struct sci_port *port)
+static void sci_init_gpios(struct sci_port *port)
 {
         struct uart_port *up = &port->port;
         int i;
@@ -1749,22 +1743,21 @@ static inline void sci_free_dma(struct uart_port *port)
 static int sci_startup(struct uart_port *port)
 {
         struct sci_port *s = to_sci_port(port);
+        unsigned long flags;
         int ret;
 
         dev_dbg(port->dev, "%s(%d)\n", __func__, port->line);
 
-        pm_runtime_put_noidle(port->dev);
-
-        sci_port_enable(s);
-
         ret = sci_request_irq(s);
         if (unlikely(ret < 0))
                 return ret;
 
         sci_request_dma(port);
 
+        spin_lock_irqsave(&port->lock, flags);
         sci_start_tx(port);
         sci_start_rx(port);
+        spin_unlock_irqrestore(&port->lock, flags);
 
         return 0;
 }
@@ -1772,18 +1765,17 @@ static int sci_startup(struct uart_port *port)
 static void sci_shutdown(struct uart_port *port)
 {
         struct sci_port *s = to_sci_port(port);
+        unsigned long flags;
 
         dev_dbg(port->dev, "%s(%d)\n", __func__, port->line);
 
+        spin_lock_irqsave(&port->lock, flags);
         sci_stop_rx(port);
         sci_stop_tx(port);
+        spin_unlock_irqrestore(&port->lock, flags);
 
         sci_free_dma(port);
         sci_free_irq(s);
-
-        sci_port_disable(s);
-
-        pm_runtime_get_noresume(port->dev);
 }
 
 static unsigned int sci_scbrr_calc(unsigned int algo_id, unsigned int bps,
@@ -1829,7 +1821,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 {
         struct sci_port *s = to_sci_port(port);
         struct plat_sci_reg *reg;
-        unsigned int baud, smr_val, max_baud;
+        unsigned int baud, smr_val, max_baud, cks;
         int t = -1;
 
         /*
@@ -1863,21 +1855,18 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 
         uart_update_timeout(port, termios->c_cflag, baud);
 
-        serial_port_out(port, SCSMR, smr_val);
-
-        dev_dbg(port->dev, "%s: SMR %x, t %x, SCSCR %x\n", __func__, smr_val, t,
-                s->cfg->scscr);
+        for (cks = 0; t >= 256 && cks <= 3; cks++)
+                t >>= 2;
 
-        if (t > 0) {
-                if (t >= 256) {
-                        serial_port_out(port, SCSMR, (serial_port_in(port, SCSMR) & ~3) | 1);
-                        t >>= 2;
-                } else
-                        serial_port_out(port, SCSMR, serial_port_in(port, SCSMR) & ~3);
+        dev_dbg(port->dev, "%s: SMR %x, cks %x, t %x, SCSCR %x\n",
+                __func__, smr_val, cks, t, s->cfg->scscr);
 
+        if (t >= 0) {
+                serial_port_out(port, SCSMR, (smr_val & ~3) | cks);
                 serial_port_out(port, SCBRR, t);
                 udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */
-        }
+        } else
+                serial_port_out(port, SCSMR, smr_val);
 
         sci_init_pins(port, termios->c_cflag);
 
@@ -1932,6 +1921,21 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
         sci_port_disable(s);
 }
 
+static void sci_pm(struct uart_port *port, unsigned int state,
+                   unsigned int oldstate)
+{
+        struct sci_port *sci_port = to_sci_port(port);
+
+        switch (state) {
+        case 3:
+                sci_port_disable(sci_port);
+                break;
+        default:
+                sci_port_enable(sci_port);
+                break;
+        }
+}
+
 static const char *sci_type(struct uart_port *port)
 {
         switch (port->type) {
@@ -2053,6 +2057,7 @@ static struct uart_ops sci_uart_ops = {
         .startup        = sci_startup,
         .shutdown       = sci_shutdown,
         .set_termios    = sci_set_termios,
+        .pm             = sci_pm,
         .type           = sci_type,
         .release_port   = sci_release_port,
         .request_port   = sci_request_port,
@@ -2064,7 +2069,7 @@ static struct uart_ops sci_uart_ops = {
 #endif
 };
 
-static int __devinit sci_init_single(struct platform_device *dev,
+static int sci_init_single(struct platform_device *dev,
                                      struct sci_port *sci_port,
                                      unsigned int index,
                                      struct plat_sci_port *p)
@@ -2121,8 +2126,6 @@ static int __devinit sci_init_single(struct platform_device *dev,
 
                 sci_init_gpios(sci_port);
 
-                pm_runtime_irq_safe(&dev->dev);
-                pm_runtime_get_noresume(&dev->dev);
                 pm_runtime_enable(&dev->dev);
         }
 
@@ -2206,9 +2209,21 @@ static void serial_console_write(struct console *co, const char *s,
 {
         struct sci_port *sci_port = &sci_ports[co->index];
         struct uart_port *port = &sci_port->port;
-        unsigned short bits;
+        unsigned short bits, ctrl;
+        unsigned long flags;
+        int locked = 1;
+
+        local_irq_save(flags);
+        if (port->sysrq)
+                locked = 0;
+        else if (oops_in_progress)
+                locked = spin_trylock(&port->lock);
+        else
+                spin_lock(&port->lock);
 
-        sci_port_enable(sci_port);
+        /* first save the SCSCR then disable the interrupts */
+        ctrl = serial_port_in(port, SCSCR);
+        serial_port_out(port, SCSCR, sci_port->cfg->scscr);
 
         uart_console_write(port, s, count, serial_console_putchar);
 
@@ -2217,10 +2232,15 @@ static void serial_console_write(struct console *co, const char *s,
         while ((serial_port_in(port, SCxSR) & bits) != bits)
                 cpu_relax();
 
-        sci_port_disable(sci_port);
+        /* restore the SCSCR */
+        serial_port_out(port, SCSCR, ctrl);
+
+        if (locked)
+                spin_unlock(&port->lock);
+        local_irq_restore(flags);
 }
 
-static int __devinit serial_console_setup(struct console *co, char *options)
+static int serial_console_setup(struct console *co, char *options)
 {
         struct sci_port *sci_port;
         struct uart_port *port;
@@ -2249,13 +2269,9 @@ static int __devinit serial_console_setup(struct console *co, char *options)
         if (unlikely(ret != 0))
                 return ret;
 
-        sci_port_enable(sci_port);
-
         if (options)
                 uart_parse_options(options, &baud, &parity, &bits, &flow);
 
-        sci_port_disable(sci_port);
-
         return uart_set_options(port, co, baud, parity, bits, flow);
 }
 
@@ -2278,7 +2294,7 @@ static struct console early_serial_console = {
 
 static char early_serial_buf[32];
 
-static int __devinit sci_probe_earlyprintk(struct platform_device *pdev)
+static int sci_probe_earlyprintk(struct platform_device *pdev)
 {
         struct plat_sci_port *cfg = pdev->dev.platform_data;
 
@@ -2298,57 +2314,15 @@ static int __devinit sci_probe_earlyprintk(struct platform_device *pdev)
         return 0;
 }
 
-#define uart_console(port)      ((port)->cons->index == (port)->line)
-
-static int sci_runtime_suspend(struct device *dev)
-{
-        struct sci_port *sci_port = dev_get_drvdata(dev);
-        struct uart_port *port = &sci_port->port;
-
-        if (uart_console(port)) {
-                struct plat_sci_reg *reg;
-
-                sci_port->saved_smr = serial_port_in(port, SCSMR);
-                sci_port->saved_brr = serial_port_in(port, SCBRR);
-
-                reg = sci_getreg(port, SCFCR);
-                if (reg->size)
-                        sci_port->saved_fcr = serial_port_in(port, SCFCR);
-                else
-                        sci_port->saved_fcr = 0;
-        }
-        return 0;
-}
-
-static int sci_runtime_resume(struct device *dev)
-{
-        struct sci_port *sci_port = dev_get_drvdata(dev);
-        struct uart_port *port = &sci_port->port;
-
-        if (uart_console(port)) {
-                sci_reset(port);
-                serial_port_out(port, SCSMR, sci_port->saved_smr);
-                serial_port_out(port, SCBRR, sci_port->saved_brr);
-
-                if (sci_port->saved_fcr)
-                        serial_port_out(port, SCFCR, sci_port->saved_fcr);
-
-                serial_port_out(port, SCSCR, sci_port->cfg->scscr);
-        }
-        return 0;
-}
-
 #define SCI_CONSOLE     (&serial_console)
 
 #else
-static inline int __devinit sci_probe_earlyprintk(struct platform_device *pdev)
+static inline int sci_probe_earlyprintk(struct platform_device *pdev)
 {
         return -EINVAL;
 }
 
 #define SCI_CONSOLE     NULL
-#define sci_runtime_suspend     NULL
-#define sci_runtime_resume      NULL
 
 #endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */
 
@@ -2379,7 +2353,7 @@ static int sci_remove(struct platform_device *dev)
         return 0;
 }
 
-static int __devinit sci_probe_single(struct platform_device *dev,
+static int sci_probe_single(struct platform_device *dev,
                                       unsigned int index,
                                       struct plat_sci_port *p,
                                       struct sci_port *sciport)
@@ -2409,7 +2383,7 @@ static int __devinit sci_probe_single(struct platform_device *dev,
         return 0;
 }
 
-static int __devinit sci_probe(struct platform_device *dev)
+static int sci_probe(struct platform_device *dev)
 {
         struct plat_sci_port *p = dev->dev.platform_data;
         struct sci_port *sp = &sci_ports[dev->id];
@@ -2466,8 +2440,6 @@ static int sci_resume(struct device *dev)
 }
 
 static const struct dev_pm_ops sci_dev_pm_ops = {
-        .runtime_suspend = sci_runtime_suspend,
-        .runtime_resume = sci_runtime_resume,
         .suspend        = sci_suspend,
         .resume         = sci_resume,
 };
diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c
index a9e2bd1ab534..5da5cb962769 100644
--- a/drivers/tty/serial/sirfsoc_uart.c
+++ b/drivers/tty/serial/sirfsoc_uart.c
@@ -727,7 +727,7 @@ static int sirfsoc_uart_resume(struct platform_device *pdev)
         return 0;
 }
 
-static struct of_device_id sirfsoc_uart_ids[] __devinitdata = {
+static struct of_device_id sirfsoc_uart_ids[] = {
         { .compatible = "sirf,prima2-uart", },
         {}
 };
@@ -735,7 +735,7 @@ MODULE_DEVICE_TABLE(of, sirfsoc_serial_of_match);
 
 static struct platform_driver sirfsoc_uart_driver = {
         .probe          = sirfsoc_uart_probe,
-        .remove         = __devexit_p(sirfsoc_uart_remove),
+        .remove         = sirfsoc_uart_remove,
         .suspend        = sirfsoc_uart_suspend,
         .resume         = sirfsoc_uart_resume,
         .driver         = {
diff --git a/drivers/tty/serial/sunhv.c b/drivers/tty/serial/sunhv.c
index 505961cfd934..b9bf9c53f7fd 100644
--- a/drivers/tty/serial/sunhv.c
+++ b/drivers/tty/serial/sunhv.c
@@ -519,7 +519,7 @@ static struct console sunhv_console = {
         .data   =       &sunhv_reg,
 };
 
-static int __devinit hv_probe(struct platform_device *op)
+static int hv_probe(struct platform_device *op)
 {
         struct uart_port *port;
         unsigned long minor;
@@ -598,7 +598,7 @@ out_free_port:
         return err;
 }
 
-static int __devexit hv_remove(struct platform_device *dev)
+static int hv_remove(struct platform_device *dev)
 {
         struct uart_port *port = dev_get_drvdata(&dev->dev);
 
@@ -636,7 +636,7 @@ static struct platform_driver hv_driver = {
                 .of_match_table = hv_match,
         },
         .probe          = hv_probe,
-        .remove         = __devexit_p(hv_remove),
+        .remove         = hv_remove,
 };
 
 static int __init sunhv_init(void)
diff --git a/drivers/tty/serial/sunsab.c b/drivers/tty/serial/sunsab.c
index f0d93eb7e6ec..bd8b3b634103 100644
--- a/drivers/tty/serial/sunsab.c
+++ b/drivers/tty/serial/sunsab.c
@@ -954,7 +954,7 @@ static inline struct console *SUNSAB_CONSOLE(void)
 #define sunsab_console_init()   do { } while (0)
 #endif
 
-static int __devinit sunsab_init_one(struct uart_sunsab_port *up,
+static int sunsab_init_one(struct uart_sunsab_port *up,
                                      struct platform_device *op,
                                      unsigned long offset,
                                      int line)
@@ -1007,7 +1007,7 @@ static int __devinit sunsab_init_one(struct uart_sunsab_port *up,
         return 0;
 }
 
-static int __devinit sab_probe(struct platform_device *op)
+static int sab_probe(struct platform_device *op)
 {
         static int inst;
         struct uart_sunsab_port *up;
@@ -1063,7 +1063,7 @@ out:
         return err;
 }
 
-static int __devexit sab_remove(struct platform_device *op)
+static int sab_remove(struct platform_device *op)
 {
         struct uart_sunsab_port *up = dev_get_drvdata(&op->dev);
 
@@ -1100,7 +1100,7 @@ static struct platform_driver sab_driver = {
                 .of_match_table = sab_match,
         },
         .probe          = sab_probe,
-        .remove         = __devexit_p(sab_remove),
+        .remove         = sab_remove,
 };
 
 static int __init sunsab_init(void)
diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c
index b97913dcdbff..220da3f9724f 100644
--- a/drivers/tty/serial/sunsu.c
+++ b/drivers/tty/serial/sunsu.c
@@ -1185,7 +1185,7 @@ static struct uart_driver sunsu_reg = {
         .major                  = TTY_MAJOR,
 };
 
-static int __devinit sunsu_kbd_ms_init(struct uart_sunsu_port *up)
+static int sunsu_kbd_ms_init(struct uart_sunsu_port *up)
 {
         int quot, baud;
 #ifdef CONFIG_SERIO
@@ -1391,7 +1391,7 @@ static inline struct console *SUNSU_CONSOLE(void)
 #define sunsu_serial_console_init()     do { } while (0)
 #endif
 
-static enum su_type __devinit su_get_type(struct device_node *dp)
+static enum su_type su_get_type(struct device_node *dp)
 {
         struct device_node *ap = of_find_node_by_path("/aliases");
 
@@ -1412,7 +1412,7 @@ static enum su_type __devinit su_get_type(struct device_node *dp)
         return SU_PORT_PORT;
 }
 
-static int __devinit su_probe(struct platform_device *op)
+static int su_probe(struct platform_device *op)
 {
         static int inst;
         struct device_node *dp = op->dev.of_node;
@@ -1503,7 +1503,7 @@ out_unmap:
         return err;
 }
 
-static int __devexit su_remove(struct platform_device *op)
+static int su_remove(struct platform_device *op)
 {
         struct uart_sunsu_port *up = dev_get_drvdata(&op->dev);
         bool kbdms = false;
@@ -1556,7 +1556,7 @@ static struct platform_driver su_driver = {
                 .of_match_table = su_match,
         },
         .probe          = su_probe,
-        .remove         = __devexit_p(su_remove),
+        .remove         = su_remove,
 };
 
 static int __init sunsu_init(void)
diff --git a/drivers/tty/serial/sunzilog.c b/drivers/tty/serial/sunzilog.c
index babd9470982b..aef4fab957c3 100644
--- a/drivers/tty/serial/sunzilog.c
+++ b/drivers/tty/serial/sunzilog.c
@@ -1282,7 +1282,7 @@ static inline struct console *SUNZILOG_CONSOLE(void)
 #define SUNZILOG_CONSOLE()      (NULL)
 #endif
 
-static void __devinit sunzilog_init_kbdms(struct uart_sunzilog_port *up)
+static void sunzilog_init_kbdms(struct uart_sunzilog_port *up)
 {
         int baud, brg;
 
@@ -1302,7 +1302,7 @@ static void __devinit sunzilog_init_kbdms(struct uart_sunzilog_port *up)
 }
 
 #ifdef CONFIG_SERIO
-static void __devinit sunzilog_register_serio(struct uart_sunzilog_port *up)
+static void sunzilog_register_serio(struct uart_sunzilog_port *up)
 {
         struct serio *serio = &up->serio;
 
@@ -1331,7 +1331,7 @@ static void __devinit sunzilog_register_serio(struct uart_sunzilog_port *up)
 }
 #endif
 
-static void __devinit sunzilog_init_hw(struct uart_sunzilog_port *up)
+static void sunzilog_init_hw(struct uart_sunzilog_port *up)
 {
         struct zilog_channel __iomem *channel;
         unsigned long flags;
@@ -1400,7 +1400,7 @@ static void __devinit sunzilog_init_hw(struct uart_sunzilog_port *up)
 
 static int zilog_irq;
 
-static int __devinit zs_probe(struct platform_device *op)
+static int zs_probe(struct platform_device *op)
 {
         static int kbm_inst, uart_inst;
         int inst;
@@ -1507,7 +1507,7 @@ static int __devinit zs_probe(struct platform_device *op)
         return 0;
 }
 
-static void __devexit zs_remove_one(struct uart_sunzilog_port *up)
+static void zs_remove_one(struct uart_sunzilog_port *up)
 {
         if (ZS_IS_KEYB(up) || ZS_IS_MOUSE(up)) {
 #ifdef CONFIG_SERIO
@@ -1517,7 +1517,7 @@ static void __devexit zs_remove_one(struct uart_sunzilog_port *up)
                 uart_remove_one_port(&sunzilog_reg, &up->port);
 }
 
-static int __devexit zs_remove(struct platform_device *op)
+static int zs_remove(struct platform_device *op)
 {
         struct uart_sunzilog_port *up = dev_get_drvdata(&op->dev);
         struct zilog_layout __iomem *regs;
@@ -1548,7 +1548,7 @@ static struct platform_driver zs_driver = {
                 .of_match_table = zs_match,
         },
         .probe          = zs_probe,
-        .remove         = __devexit_p(zs_remove),
+        .remove         = zs_remove,
 };
 
 static int __init sunzilog_init(void)
diff --git a/drivers/tty/serial/timbuart.c b/drivers/tty/serial/timbuart.c
index 70f97491d8f2..5be0d68feceb 100644
--- a/drivers/tty/serial/timbuart.c
+++ b/drivers/tty/serial/timbuart.c
@@ -426,7 +426,7 @@ static struct uart_driver timbuart_driver = {
         .nr = 1
 };
 
-static int __devinit timbuart_probe(struct platform_device *dev)
+static int timbuart_probe(struct platform_device *dev)
 {
         int err, irq;
         struct timbuart_port *uart;
@@ -492,7 +492,7 @@ err_mem:
         return err;
 }
 
-static int __devexit timbuart_remove(struct platform_device *dev)
+static int timbuart_remove(struct platform_device *dev)
 {
         struct timbuart_port *uart = platform_get_drvdata(dev);
 
@@ -510,7 +510,7 @@ static struct platform_driver timbuart_platform_driver = {
                 .owner  = THIS_MODULE,
         },
         .probe          = timbuart_probe,
-        .remove         = __devexit_p(timbuart_remove),
+        .remove         = timbuart_remove,
 };
 
 module_platform_driver(timbuart_platform_driver);
diff --git a/drivers/tty/serial/uartlite.c b/drivers/tty/serial/uartlite.c
index 6579ffdd8e9b..89eee43c4e2d 100644
--- a/drivers/tty/serial/uartlite.c
+++ b/drivers/tty/serial/uartlite.c
@@ -408,7 +408,7 @@ static void ulite_console_write(struct console *co, const char *s,
                 spin_unlock_irqrestore(&port->lock, flags);
 }
 
-static int __devinit ulite_console_setup(struct console *co, char *options)
+static int ulite_console_setup(struct console *co, char *options)
 {
         struct uart_port *port;
         int baud = 9600;
@@ -486,7 +486,7 @@ static struct uart_driver ulite_uart_driver = {
  *
  * Returns: 0 on success, <0 otherwise
  */
-static int __devinit ulite_assign(struct device *dev, int id, u32 base, int irq)
+static int ulite_assign(struct device *dev, int id, u32 base, int irq)
 {
         struct uart_port *port;
         int rc;
@@ -542,7 +542,7 @@ static int __devinit ulite_assign(struct device *dev, int id, u32 base, int irq)
  *
  * @dev: pointer to device structure
  */
-static int __devexit ulite_release(struct device *dev)
+static int ulite_release(struct device *dev)
 {
         struct uart_port *port = dev_get_drvdata(dev);
         int rc = 0;
@@ -562,7 +562,7 @@ static int __devexit ulite_release(struct device *dev)
 
 #if defined(CONFIG_OF)
 /* Match table for of_platform binding */
-static struct of_device_id ulite_of_match[] __devinitdata = {
+static struct of_device_id ulite_of_match[] = {
         { .compatible = "xlnx,opb-uartlite-1.00.b", },
         { .compatible = "xlnx,xps-uartlite-1.00.a", },
         {}
@@ -570,7 +570,7 @@ static struct of_device_id ulite_of_match[] __devinitdata = {
 MODULE_DEVICE_TABLE(of, ulite_of_match);
 #endif /* CONFIG_OF */
 
-static int __devinit ulite_probe(struct platform_device *pdev)
+static int ulite_probe(struct platform_device *pdev)
 {
         struct resource *res, *res2;
         int id = pdev->id;
@@ -593,7 +593,7 @@ static int __devinit ulite_probe(struct platform_device *pdev)
         return ulite_assign(&pdev->dev, id, res->start, res2->start);
 }
 
-static int __devexit ulite_remove(struct platform_device *pdev)
+static int ulite_remove(struct platform_device *pdev)
 {
         return ulite_release(&pdev->dev);
 }
@@ -603,7 +603,7 @@ MODULE_ALIAS("platform:uartlite");
 
 static struct platform_driver ulite_platform_driver = {
         .probe = ulite_probe,
-        .remove = __devexit_p(ulite_remove),
+        .remove = ulite_remove,
         .driver = {
                 .owner = THIS_MODULE,
                 .name  = "uartlite",
diff --git a/drivers/tty/serial/vr41xx_siu.c b/drivers/tty/serial/vr41xx_siu.c
index cf0d9485ec08..62ee0166bc65 100644
--- a/drivers/tty/serial/vr41xx_siu.c
+++ b/drivers/tty/serial/vr41xx_siu.c
@@ -823,7 +823,7 @@ static struct console siu_console = {
         .data   = &siu_uart_driver,
 };
 
-static int __devinit siu_console_init(void)
+static int siu_console_init(void)
 {
         struct uart_port *port;
         int i;
@@ -867,7 +867,7 @@ static struct uart_driver siu_uart_driver = {
         .cons           = SERIAL_VR41XX_CONSOLE,
 };
 
-static int __devinit siu_probe(struct platform_device *dev)
+static int siu_probe(struct platform_device *dev)
 {
         struct uart_port *port;
         int num, i, retval;
@@ -901,7 +901,7 @@ static int __devinit siu_probe(struct platform_device *dev)
         return 0;
 }
 
-static int __devexit siu_remove(struct platform_device *dev)
+static int siu_remove(struct platform_device *dev)
 {
         struct uart_port *port;
         int i;
@@ -952,7 +952,7 @@ static int siu_resume(struct platform_device *dev)
 
 static struct platform_driver siu_device_driver = {
         .probe          = siu_probe,
-        .remove         = __devexit_p(siu_remove),
+        .remove         = siu_remove,
         .suspend        = siu_suspend,
         .resume         = siu_resume,
         .driver         = {
diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c
index 205d4cf4a063..8fd181436a6b 100644
--- a/drivers/tty/serial/vt8500_serial.c
+++ b/drivers/tty/serial/vt8500_serial.c
@@ -554,7 +554,7 @@ static struct uart_driver vt8500_uart_driver = {
         .cons           = VT8500_CONSOLE,
 };
 
-static int __devinit vt8500_serial_probe(struct platform_device *pdev)
+static int vt8500_serial_probe(struct platform_device *pdev)
 {
         struct vt8500_port *vt8500_port;
         struct resource *mmres, *irqres;
@@ -567,10 +567,6 @@ static int __devinit vt8500_serial_probe(struct platform_device *pdev)
         if (!mmres || !irqres)
                 return -ENODEV;
 
-        vt8500_port = kzalloc(sizeof(struct vt8500_port), GFP_KERNEL);
-        if (!vt8500_port)
-                return -ENOMEM;
-
         if (np)
                 port = of_alias_get_id(np, "serial");
                 if (port > VT8500_MAX_PORTS)
@@ -593,6 +589,10 @@ static int __devinit vt8500_serial_probe(struct platform_device *pdev)
                 return -EBUSY;
         }
 
+        vt8500_port = kzalloc(sizeof(struct vt8500_port), GFP_KERNEL);
+        if (!vt8500_port)
+                return -ENOMEM;
+
         vt8500_port->uart.type = PORT_VT8500;
         vt8500_port->uart.iotype = UPIO_MEM;
         vt8500_port->uart.mapbase = mmres->start;
@@ -634,7 +634,7 @@ err:
         return ret;
 }
 
-static int __devexit vt8500_serial_remove(struct platform_device *pdev)
+static int vt8500_serial_remove(struct platform_device *pdev)
 {
         struct vt8500_port *vt8500_port = platform_get_drvdata(pdev);
 
@@ -652,7 +652,7 @@ static const struct of_device_id wmt_dt_ids[] = {
 
 static struct platform_driver vt8500_platform_driver = {
         .probe  = vt8500_serial_probe,
-        .remove = __devexit_p(vt8500_serial_remove),
+        .remove = vt8500_serial_remove,
         .driver = {
                 .name = "vt8500_serial",
                 .owner = THIS_MODULE,
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index b627363352e5..9ab910370c56 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -939,22 +939,18 @@ static struct uart_driver xuartps_uart_driver = {
  *
  * Returns 0 on success, negative error otherwise
  **/
-static int __devinit xuartps_probe(struct platform_device *pdev)
+static int xuartps_probe(struct platform_device *pdev)
 {
         int rc;
         struct uart_port *port;
         struct resource *res, *res2;
         int clk = 0;
 
-#ifdef CONFIG_OF
         const unsigned int *prop;
 
         prop = of_get_property(pdev->dev.of_node, "clock", NULL);
         if (prop)
                 clk = be32_to_cpup(prop);
-#else
-        clk = *((unsigned int *)(pdev->dev.platform_data));
-#endif
         if (!clk) {
                 dev_err(&pdev->dev, "no clock specified\n");
                 return -ENODEV;
@@ -1001,7 +997,7 @@ static int __devinit xuartps_probe(struct platform_device *pdev)
  *
  * Returns 0 on success, negative error otherwise
  **/
-static int __devexit xuartps_remove(struct platform_device *pdev)
+static int xuartps_remove(struct platform_device *pdev)
 {
         struct uart_port *port = dev_get_drvdata(&pdev->dev);
         int rc = 0;
@@ -1044,16 +1040,11 @@ static int xuartps_resume(struct platform_device *pdev)
 }
 
 /* Match table for of_platform binding */
-
-#ifdef CONFIG_OF
-static struct of_device_id xuartps_of_match[] __devinitdata = {
+static struct of_device_id xuartps_of_match[] = {
         { .compatible = "xlnx,xuartps", },
         {}
 };
 MODULE_DEVICE_TABLE(of, xuartps_of_match);
-#else
-#define xuartps_of_match NULL
-#endif
 
 static struct platform_driver xuartps_platform_driver = {
         .probe   = xuartps_probe,               /* Probe method */
diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c
index 70e3a525bc82..9e071f6985f6 100644
--- a/drivers/tty/synclink.c
+++ b/drivers/tty/synclink.c
@@ -898,7 +898,7 @@ static struct pci_driver synclink_pci_driver = {
         .name           = "synclink",
         .id_table       = synclink_pci_tbl,
         .probe          = synclink_init_one,
-        .remove         = __devexit_p(synclink_remove_one),
+        .remove         = synclink_remove_one,
 };
 
 static struct tty_driver *serial_driver;
@@ -4425,6 +4425,7 @@ static void synclink_cleanup(void)
                 mgsl_release_resources(info);
                 tmp = info;
                 info = info->next_device;
+                tty_port_destroy(&tmp->port);
                 kfree(tmp);
         }
         
@@ -8064,7 +8065,7 @@ static void hdlcdev_exit(struct mgsl_struct *info)
 #endif /* CONFIG_HDLC */
 
 
-static int __devinit synclink_init_one (struct pci_dev *dev,
+static int synclink_init_one (struct pci_dev *dev,
                                         const struct pci_device_id *ent)
 {
         struct mgsl_struct *info;
@@ -8116,7 +8117,7 @@ static int __devinit synclink_init_one (struct pci_dev *dev,
         return 0;
 }
 
-static void __devexit synclink_remove_one (struct pci_dev *dev)
+static void synclink_remove_one (struct pci_dev *dev)
 {
 }
 
diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index b38e954eedd3..aba1e59f4a88 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -110,7 +110,7 @@ static struct pci_driver pci_driver = {
         .name           = "synclink_gt",
         .id_table       = pci_table,
         .probe          = init_one,
-        .remove         = __devexit_p(remove_one),
+        .remove         = remove_one,
 };
 
 static bool pci_registered;
@@ -3645,8 +3645,10 @@ static void device_init(int adapter_num, struct pci_dev *pdev)
         for (i=0; i < port_count; ++i) {
                 port_array[i] = alloc_dev(adapter_num, i, pdev);
                 if (port_array[i] == NULL) {
-                        for (--i; i >= 0; --i)
+                        for (--i; i >= 0; --i) {
+                                tty_port_destroy(&port_array[i]->port);
                                 kfree(port_array[i]);
+                        }
                         return;
                 }
         }
@@ -3696,7 +3698,7 @@ static void device_init(int adapter_num, struct pci_dev *pdev)
         }
 }
 
-static int __devinit init_one(struct pci_dev *dev,
+static int init_one(struct pci_dev *dev,
                               const struct pci_device_id *ent)
 {
         if (pci_enable_device(dev)) {
@@ -3708,7 +3710,7 @@ static int __devinit init_one(struct pci_dev *dev,
         return 0;
 }
 
-static void __devexit remove_one(struct pci_dev *dev)
+static void remove_one(struct pci_dev *dev)
 {
 }
 
@@ -3773,6 +3775,7 @@ static void slgt_cleanup(void)
                         release_resources(info);
                 tmp = info;
                 info = info->next_device;
+                tty_port_destroy(&tmp->port);
                 kfree(tmp);
         }
 
diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c
index f17d9f3d84a2..fd43fb6f7cee 100644
--- a/drivers/tty/synclinkmp.c
+++ b/drivers/tty/synclinkmp.c
@@ -492,7 +492,7 @@ static struct pci_driver synclinkmp_pci_driver = {
         .name           = "synclinkmp",
         .id_table       = synclinkmp_pci_tbl,
         .probe          = synclinkmp_init_one,
-        .remove         = __devexit_p(synclinkmp_remove_one),
+        .remove         = synclinkmp_remove_one,
 };
 
 
@@ -3843,8 +3843,10 @@ static void device_init(int adapter_num, struct pci_dev *pdev)
         for ( port = 0; port < SCA_MAX_PORTS; ++port ) {
                 port_array[port] = alloc_dev(adapter_num,port,pdev);
                 if( port_array[port] == NULL ) {
-                        for ( --port; port >= 0; --port )
+                        for (--port; port >= 0; --port) {
+                                tty_port_destroy(&port_array[port]->port);
                                 kfree(port_array[port]);
+                        }
                         return;
                 }
         }
@@ -3953,6 +3955,7 @@ static void synclinkmp_cleanup(void)
                 }
                 tmp = info;
                 info = info->next_device;
+                tty_port_destroy(&tmp->port);
                 kfree(tmp);
         }
 
@@ -5592,7 +5595,7 @@ static void write_control_reg(SLMP_INFO * info)
 }
 
 
-static int __devinit synclinkmp_init_one (struct pci_dev *dev,
+static int synclinkmp_init_one (struct pci_dev *dev,
                                           const struct pci_device_id *ent)
 {
         if (pci_enable_device(dev)) {
@@ -5603,6 +5606,6 @@ static int __devinit synclinkmp_init_one (struct pci_dev *dev,
         return 0;
 }
 
-static void __devexit synclinkmp_remove_one (struct pci_dev *dev)
+static void synclinkmp_remove_one (struct pci_dev *dev)
 {
 }
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index 16ee6cee07da..b3c4a250ff86 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -346,7 +346,8 @@ static struct sysrq_key_op sysrq_term_op = {
 
 static void moom_callback(struct work_struct *ignored)
 {
-        out_of_memory(node_zonelist(0, GFP_KERNEL), GFP_KERNEL, 0, NULL, true);
+        out_of_memory(node_zonelist(first_online_node, GFP_KERNEL), GFP_KERNEL,
+                      0, NULL, true);
 }
 
 static DECLARE_WORK(moom_work, moom_callback);
diff --git a/drivers/tty/tty_audit.c b/drivers/tty/tty_audit.c
index b0b39b823ccf..6953dc82850c 100644
--- a/drivers/tty/tty_audit.c
+++ b/drivers/tty/tty_audit.c
@@ -23,7 +23,7 @@ struct tty_audit_buf {
 };
 
 static struct tty_audit_buf *tty_audit_buf_alloc(int major, int minor,
-                                                 int icanon)
+                                                 unsigned icanon)
 {
         struct tty_audit_buf *buf;
 
@@ -239,7 +239,8 @@ int tty_audit_push_task(struct task_struct *tsk, kuid_t loginuid, u32 sessionid)
  *      if TTY auditing is disabled or out of memory.  Otherwise, return a new
  *      reference to the buffer.
  */
-static struct tty_audit_buf *tty_audit_buf_get(struct tty_struct *tty)
+static struct tty_audit_buf *tty_audit_buf_get(struct tty_struct *tty,
+                unsigned icanon)
 {
         struct tty_audit_buf *buf, *buf2;
 
@@ -257,7 +258,7 @@ static struct tty_audit_buf *tty_audit_buf_get(struct tty_struct *tty)
 
         buf2 = tty_audit_buf_alloc(tty->driver->major,
                                    tty->driver->minor_start + tty->index,
-                                   tty->icanon);
+                                   icanon);
         if (buf2 == NULL) {
                 audit_log_lost("out of memory in TTY auditing");
                 return NULL;
@@ -287,7 +288,7 @@ static struct tty_audit_buf *tty_audit_buf_get(struct tty_struct *tty)
  *      Audit @data of @size from @tty, if necessary.
  */
 void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
-                        size_t size)
+                        size_t size, unsigned icanon)
 {
         struct tty_audit_buf *buf;
         int major, minor;
@@ -299,7 +300,7 @@ void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
             && tty->driver->subtype == PTY_TYPE_MASTER)
                 return;
 
-        buf = tty_audit_buf_get(tty);
+        buf = tty_audit_buf_get(tty, icanon);
         if (!buf)
                 return;
 
@@ -307,11 +308,11 @@ void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
         major = tty->driver->major;
         minor = tty->driver->minor_start + tty->index;
         if (buf->major != major || buf->minor != minor
-            || buf->icanon != tty->icanon) {
+            || buf->icanon != icanon) {
                 tty_audit_buf_push_current(buf);
                 buf->major = major;
                 buf->minor = minor;
-                buf->icanon = tty->icanon;
+                buf->icanon = icanon;
         }
         do {
                 size_t run;
diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index 91e326ffe7db..45d916198f78 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -27,19 +27,21 @@
  *      Locking: none
  */
 
-void tty_buffer_free_all(struct tty_struct *tty)
+void tty_buffer_free_all(struct tty_port *port)
 {
+        struct tty_bufhead *buf = &port->buf;
         struct tty_buffer *thead;
-        while ((thead = tty->buf.head) != NULL) {
-                tty->buf.head = thead->next;
+
+        while ((thead = buf->head) != NULL) {
+                buf->head = thead->next;
                 kfree(thead);
         }
-        while ((thead = tty->buf.free) != NULL) {
-                tty->buf.free = thead->next;
+        while ((thead = buf->free) != NULL) {
+                buf->free = thead->next;
                 kfree(thead);
         }
-        tty->buf.tail = NULL;
-        tty->buf.memory_used = 0;
+        buf->tail = NULL;
+        buf->memory_used = 0;
 }
 
 /**
@@ -54,11 +56,11 @@ void tty_buffer_free_all(struct tty_struct *tty)
  *      Locking: Caller must hold tty->buf.lock
  */
 
-static struct tty_buffer *tty_buffer_alloc(struct tty_struct *tty, size_t size)
+static struct tty_buffer *tty_buffer_alloc(struct tty_port *port, size_t size)
 {
         struct tty_buffer *p;
 
-        if (tty->buf.memory_used + size > 65536)
+        if (port->buf.memory_used + size > 65536)
                 return NULL;
         p = kmalloc(sizeof(struct tty_buffer) + 2 * size, GFP_ATOMIC);
         if (p == NULL)
@@ -70,7 +72,7 @@ static struct tty_buffer *tty_buffer_alloc(struct tty_struct *tty, size_t size)
         p->read = 0;
         p->char_buf_ptr = (char *)(p->data);
         p->flag_buf_ptr = (unsigned char *)p->char_buf_ptr + size;
-        tty->buf.memory_used += size;
+        port->buf.memory_used += size;
         return p;
 }
 
@@ -85,17 +87,19 @@ static struct tty_buffer *tty_buffer_alloc(struct tty_struct *tty, size_t size)
  *      Locking: Caller must hold tty->buf.lock
  */
 
-static void tty_buffer_free(struct tty_struct *tty, struct tty_buffer *b)
+static void tty_buffer_free(struct tty_port *port, struct tty_buffer *b)
 {
+        struct tty_bufhead *buf = &port->buf;
+
         /* Dumb strategy for now - should keep some stats */
-        tty->buf.memory_used -= b->size;
-        WARN_ON(tty->buf.memory_used < 0);
+        buf->memory_used -= b->size;
+        WARN_ON(buf->memory_used < 0);
 
         if (b->size >= 512)
                 kfree(b);
         else {
-                b->next = tty->buf.free;
-                tty->buf.free = b;
+                b->next = buf->free;
+                buf->free = b;
         }
 }
 
@@ -110,15 +114,16 @@ static void tty_buffer_free(struct tty_struct *tty, struct tty_buffer *b)
  *      Locking: Caller must hold tty->buf.lock
  */
 
-static void __tty_buffer_flush(struct tty_struct *tty)
+static void __tty_buffer_flush(struct tty_port *port)
 {
+        struct tty_bufhead *buf = &port->buf;
         struct tty_buffer *thead;
 
-        while ((thead = tty->buf.head) != NULL) {
-                tty->buf.head = thead->next;
-                tty_buffer_free(tty, thead);
+        while ((thead = buf->head) != NULL) {
+                buf->head = thead->next;
+                tty_buffer_free(port, thead);
         }
-        tty->buf.tail = NULL;
+        buf->tail = NULL;
 }
 
 /**
@@ -134,21 +139,24 @@ static void __tty_buffer_flush(struct tty_struct *tty)
 
 void tty_buffer_flush(struct tty_struct *tty)
 {
+        struct tty_port *port = tty->port;
+        struct tty_bufhead *buf = &port->buf;
         unsigned long flags;
-        spin_lock_irqsave(&tty->buf.lock, flags);
+
+        spin_lock_irqsave(&buf->lock, flags);
 
         /* If the data is being pushed to the tty layer then we can't
            process it here. Instead set a flag and the flush_to_ldisc
            path will process the flush request before it exits */
-        if (test_bit(TTY_FLUSHING, &tty->flags)) {
-                set_bit(TTY_FLUSHPENDING, &tty->flags);
-                spin_unlock_irqrestore(&tty->buf.lock, flags);
+        if (test_bit(TTYP_FLUSHING, &port->iflags)) {
+                set_bit(TTYP_FLUSHPENDING, &port->iflags);
+                spin_unlock_irqrestore(&buf->lock, flags);
                 wait_event(tty->read_wait,
-                                test_bit(TTY_FLUSHPENDING, &tty->flags) == 0);
+                                test_bit(TTYP_FLUSHPENDING, &port->iflags) == 0);
                 return;
         } else
-                __tty_buffer_flush(tty);
-        spin_unlock_irqrestore(&tty->buf.lock, flags);
+                __tty_buffer_flush(port);
+        spin_unlock_irqrestore(&buf->lock, flags);
 }
 
 /**
@@ -163,9 +171,9 @@ void tty_buffer_flush(struct tty_struct *tty)
  *      Locking: Caller must hold tty->buf.lock
  */
 
-static struct tty_buffer *tty_buffer_find(struct tty_struct *tty, size_t size)
+static struct tty_buffer *tty_buffer_find(struct tty_port *port, size_t size)
 {
-        struct tty_buffer **tbh = &tty->buf.free;
+        struct tty_buffer **tbh = &port->buf.free;
         while ((*tbh) != NULL) {
                 struct tty_buffer *t = *tbh;
                 if (t->size >= size) {
@@ -174,14 +182,14 @@ static struct tty_buffer *tty_buffer_find(struct tty_struct *tty, size_t size)
                         t->used = 0;
                         t->commit = 0;
                         t->read = 0;
-                        tty->buf.memory_used += t->size;
+                        port->buf.memory_used += t->size;
                         return t;
                 }
                 tbh = &((*tbh)->next);
         }
         /* Round the buffer size out */
         size = (size + 0xFF) & ~0xFF;
-        return tty_buffer_alloc(tty, size);
+        return tty_buffer_alloc(port, size);
         /* Should possibly check if this fails for the largest buffer we
            have queued and recycle that ? */
 }
@@ -192,29 +200,31 @@ static struct tty_buffer *tty_buffer_find(struct tty_struct *tty, size_t size)
  *
  *      Make at least size bytes of linear space available for the tty
  *      buffer. If we fail return the size we managed to find.
- *      Locking: Caller must hold tty->buf.lock
+ *      Locking: Caller must hold port->buf.lock
  */
-static int __tty_buffer_request_room(struct tty_struct *tty, size_t size)
+static int __tty_buffer_request_room(struct tty_port *port, size_t size)
 {
+        struct tty_bufhead *buf = &port->buf;
         struct tty_buffer *b, *n;
         int left;
         /* OPTIMISATION: We could keep a per tty "zero" sized buffer to
            remove this conditional if its worth it. This would be invisible
            to the callers */
-        if ((b = tty->buf.tail) != NULL)
+        b = buf->tail;
+        if (b != NULL)
                 left = b->size - b->used;
         else
                 left = 0;
 
         if (left < size) {
                 /* This is the slow path - looking for new buffers to use */
-                if ((n = tty_buffer_find(tty, size)) != NULL) {
+                if ((n = tty_buffer_find(port, size)) != NULL) {
                         if (b != NULL) {
                                 b->next = n;
                                 b->commit = b->used;
                         } else
-                                tty->buf.head = n;
-                        tty->buf.tail = n;
+                                buf->head = n;
+                        buf->tail = n;
                 } else
                         size = left;
         }
@@ -231,16 +241,17 @@ static int __tty_buffer_request_room(struct tty_struct *tty, size_t size)
  *      Make at least size bytes of linear space available for the tty
  *      buffer. If we fail return the size we managed to find.
  *
- *      Locking: Takes tty->buf.lock
+ *      Locking: Takes port->buf.lock
  */
 int tty_buffer_request_room(struct tty_struct *tty, size_t size)
 {
+        struct tty_port *port = tty->port;
         unsigned long flags;
         int length;
 
-        spin_lock_irqsave(&tty->buf.lock, flags);
-        length = __tty_buffer_request_room(tty, size);
-        spin_unlock_irqrestore(&tty->buf.lock, flags);
+        spin_lock_irqsave(&port->buf.lock, flags);
+        length = __tty_buffer_request_room(port, size);
+        spin_unlock_irqrestore(&port->buf.lock, flags);
         return length;
 }
 EXPORT_SYMBOL_GPL(tty_buffer_request_room);
@@ -255,12 +266,13 @@ EXPORT_SYMBOL_GPL(tty_buffer_request_room);
  *      Queue a series of bytes to the tty buffering. All the characters
  *      passed are marked with the supplied flag. Returns the number added.
  *
- *      Locking: Called functions may take tty->buf.lock
+ *      Locking: Called functions may take port->buf.lock
  */
 
 int tty_insert_flip_string_fixed_flag(struct tty_struct *tty,
                 const unsigned char *chars, char flag, size_t size)
 {
+        struct tty_bufhead *buf = &tty->port->buf;
         int copied = 0;
         do {
                 int goal = min_t(size_t, size - copied, TTY_BUFFER_PAGE);
@@ -268,18 +280,18 @@ int tty_insert_flip_string_fixed_flag(struct tty_struct *tty,
                 unsigned long flags;
                 struct tty_buffer *tb;
 
-                spin_lock_irqsave(&tty->buf.lock, flags);
-                space = __tty_buffer_request_room(tty, goal);
-                tb = tty->buf.tail;
+                spin_lock_irqsave(&buf->lock, flags);
+                space = __tty_buffer_request_room(tty->port, goal);
+                tb = buf->tail;
                 /* If there is no space then tb may be NULL */
                 if (unlikely(space == 0)) {
-                        spin_unlock_irqrestore(&tty->buf.lock, flags);
+                        spin_unlock_irqrestore(&buf->lock, flags);
                         break;
                 }
                 memcpy(tb->char_buf_ptr + tb->used, chars, space);
                 memset(tb->flag_buf_ptr + tb->used, flag, space);
                 tb->used += space;
-                spin_unlock_irqrestore(&tty->buf.lock, flags);
+                spin_unlock_irqrestore(&buf->lock, flags);
                 copied += space;
                 chars += space;
                 /* There is a small chance that we need to split the data over
@@ -300,12 +312,13 @@ EXPORT_SYMBOL(tty_insert_flip_string_fixed_flag);
  *      the flags array indicates the status of the character. Returns the
  *      number added.
  *
- *      Locking: Called functions may take tty->buf.lock
+ *      Locking: Called functions may take port->buf.lock
  */
 
 int tty_insert_flip_string_flags(struct tty_struct *tty,
                 const unsigned char *chars, const char *flags, size_t size)
 {
+        struct tty_bufhead *buf = &tty->port->buf;
         int copied = 0;
         do {
                 int goal = min_t(size_t, size - copied, TTY_BUFFER_PAGE);
@@ -313,18 +326,18 @@ int tty_insert_flip_string_flags(struct tty_struct *tty,
                 unsigned long __flags;
                 struct tty_buffer *tb;
 
-                spin_lock_irqsave(&tty->buf.lock, __flags);
-                space = __tty_buffer_request_room(tty, goal);
-                tb = tty->buf.tail;
+                spin_lock_irqsave(&buf->lock, __flags);
+                space = __tty_buffer_request_room(tty->port, goal);
+                tb = buf->tail;
                 /* If there is no space then tb may be NULL */
                 if (unlikely(space == 0)) {
-                        spin_unlock_irqrestore(&tty->buf.lock, __flags);
+                        spin_unlock_irqrestore(&buf->lock, __flags);
                         break;
                 }
                 memcpy(tb->char_buf_ptr + tb->used, chars, space);
                 memcpy(tb->flag_buf_ptr + tb->used, flags, space);
                 tb->used += space;
-                spin_unlock_irqrestore(&tty->buf.lock, __flags);
+                spin_unlock_irqrestore(&buf->lock, __flags);
                 copied += space;
                 chars += space;
                 flags += space;
@@ -342,18 +355,23 @@ EXPORT_SYMBOL(tty_insert_flip_string_flags);
  *      Takes any pending buffers and transfers their ownership to the
  *      ldisc side of the queue. It then schedules those characters for
  *      processing by the line discipline.
+ *      Note that this function can only be used when the low_latency flag
+ *      is unset. Otherwise the workqueue won't be flushed.
  *
- *      Locking: Takes tty->buf.lock
+ *      Locking: Takes port->buf.lock
  */
 
 void tty_schedule_flip(struct tty_struct *tty)
 {
+        struct tty_bufhead *buf = &tty->port->buf;
         unsigned long flags;
-        spin_lock_irqsave(&tty->buf.lock, flags);
-        if (tty->buf.tail != NULL)
-                tty->buf.tail->commit = tty->buf.tail->used;
-        spin_unlock_irqrestore(&tty->buf.lock, flags);
-        schedule_work(&tty->buf.work);
+        WARN_ON(tty->low_latency);
+
+        spin_lock_irqsave(&buf->lock, flags);
+        if (buf->tail != NULL)
+                buf->tail->commit = buf->tail->used;
+        spin_unlock_irqrestore(&buf->lock, flags);
+        schedule_work(&buf->work);
 }
 EXPORT_SYMBOL(tty_schedule_flip);
 
@@ -369,26 +387,27 @@ EXPORT_SYMBOL(tty_schedule_flip);
  *      that need their own block copy routines into the buffer. There is no
  *      guarantee the buffer is a DMA target!
  *
- *      Locking: May call functions taking tty->buf.lock
+ *      Locking: May call functions taking port->buf.lock
  */
 
 int tty_prepare_flip_string(struct tty_struct *tty, unsigned char **chars,
-                                                                size_t size)
+                size_t size)
 {
+        struct tty_bufhead *buf = &tty->port->buf;
         int space;
         unsigned long flags;
         struct tty_buffer *tb;
 
-        spin_lock_irqsave(&tty->buf.lock, flags);
-        space = __tty_buffer_request_room(tty, size);
+        spin_lock_irqsave(&buf->lock, flags);
+        space = __tty_buffer_request_room(tty->port, size);
 
-        tb = tty->buf.tail;
+        tb = buf->tail;
         if (likely(space)) {
                 *chars = tb->char_buf_ptr + tb->used;
                 memset(tb->flag_buf_ptr + tb->used, TTY_NORMAL, space);
                 tb->used += space;
         }
-        spin_unlock_irqrestore(&tty->buf.lock, flags);
+        spin_unlock_irqrestore(&buf->lock, flags);
         return space;
 }
 EXPORT_SYMBOL_GPL(tty_prepare_flip_string);
@@ -406,26 +425,27 @@ EXPORT_SYMBOL_GPL(tty_prepare_flip_string);
  *      that need their own block copy routines into the buffer. There is no
  *      guarantee the buffer is a DMA target!
  *
- *      Locking: May call functions taking tty->buf.lock
+ *      Locking: May call functions taking port->buf.lock
  */
 
 int tty_prepare_flip_string_flags(struct tty_struct *tty,
                         unsigned char **chars, char **flags, size_t size)
 {
+        struct tty_bufhead *buf = &tty->port->buf;
         int space;
         unsigned long __flags;
         struct tty_buffer *tb;
 
-        spin_lock_irqsave(&tty->buf.lock, __flags);
-        space = __tty_buffer_request_room(tty, size);
+        spin_lock_irqsave(&buf->lock, __flags);
+        space = __tty_buffer_request_room(tty->port, size);
 
-        tb = tty->buf.tail;
+        tb = buf->tail;
         if (likely(space)) {
                 *chars = tb->char_buf_ptr + tb->used;
                 *flags = tb->flag_buf_ptr + tb->used;
                 tb->used += space;
         }
-        spin_unlock_irqrestore(&tty->buf.lock, __flags);
+        spin_unlock_irqrestore(&buf->lock, __flags);
         return space;
 }
 EXPORT_SYMBOL_GPL(tty_prepare_flip_string_flags);
@@ -446,20 +466,25 @@ EXPORT_SYMBOL_GPL(tty_prepare_flip_string_flags);
 
 static void flush_to_ldisc(struct work_struct *work)
 {
-        struct tty_struct *tty =
-                container_of(work, struct tty_struct, buf.work);
+        struct tty_port *port = container_of(work, struct tty_port, buf.work);
+        struct tty_bufhead *buf = &port->buf;
+        struct tty_struct *tty;
         unsigned long   flags;
         struct tty_ldisc *disc;
 
+        tty = port->itty;
+        if (WARN_RATELIMIT(tty == NULL, "tty is NULL\n"))
+                return;
+
         disc = tty_ldisc_ref(tty);
         if (disc == NULL)       /*  !TTY_LDISC */
                 return;
 
-        spin_lock_irqsave(&tty->buf.lock, flags);
+        spin_lock_irqsave(&buf->lock, flags);
 
-        if (!test_and_set_bit(TTY_FLUSHING, &tty->flags)) {
+        if (!test_and_set_bit(TTYP_FLUSHING, &port->iflags)) {
                 struct tty_buffer *head;
-                while ((head = tty->buf.head) != NULL) {
+                while ((head = buf->head) != NULL) {
                         int count;
                         char *char_buf;
                         unsigned char *flag_buf;
@@ -468,14 +493,14 @@ static void flush_to_ldisc(struct work_struct *work)
                         if (!count) {
                                 if (head->next == NULL)
                                         break;
-                                tty->buf.head = head->next;
-                                tty_buffer_free(tty, head);
+                                buf->head = head->next;
+                                tty_buffer_free(port, head);
                                 continue;
                         }
                         /* Ldisc or user is trying to flush the buffers
                            we are feeding to the ldisc, stop feeding the
                            line discipline as we want to empty the queue */
-                        if (test_bit(TTY_FLUSHPENDING, &tty->flags))
+                        if (test_bit(TTYP_FLUSHPENDING, &port->iflags))
                                 break;
                         if (!tty->receive_room)
                                 break;
@@ -484,22 +509,22 @@ static void flush_to_ldisc(struct work_struct *work)
                         char_buf = head->char_buf_ptr + head->read;
                         flag_buf = head->flag_buf_ptr + head->read;
                         head->read += count;
-                        spin_unlock_irqrestore(&tty->buf.lock, flags);
+                        spin_unlock_irqrestore(&buf->lock, flags);
                         disc->ops->receive_buf(tty, char_buf,
                                                         flag_buf, count);
-                        spin_lock_irqsave(&tty->buf.lock, flags);
+                        spin_lock_irqsave(&buf->lock, flags);
                 }
-                clear_bit(TTY_FLUSHING, &tty->flags);
+                clear_bit(TTYP_FLUSHING, &port->iflags);
         }
 
         /* We may have a deferred request to flush the input buffer,
            if so pull the chain under the lock and empty the queue */
-        if (test_bit(TTY_FLUSHPENDING, &tty->flags)) {
-                __tty_buffer_flush(tty);
-                clear_bit(TTY_FLUSHPENDING, &tty->flags);
+        if (test_bit(TTYP_FLUSHPENDING, &port->iflags)) {
+                __tty_buffer_flush(port);
+                clear_bit(TTYP_FLUSHPENDING, &port->iflags);
                 wake_up(&tty->read_wait);
         }
-        spin_unlock_irqrestore(&tty->buf.lock, flags);
+        spin_unlock_irqrestore(&buf->lock, flags);
 
         tty_ldisc_deref(disc);
 }
@@ -514,7 +539,8 @@ static void flush_to_ldisc(struct work_struct *work)
  */
 void tty_flush_to_ldisc(struct tty_struct *tty)
 {
-        flush_work(&tty->buf.work);
+        if (!tty->low_latency)
+                flush_work(&tty->port->buf.work);
 }
 
 /**
@@ -532,16 +558,18 @@ void tty_flush_to_ldisc(struct tty_struct *tty)
 
 void tty_flip_buffer_push(struct tty_struct *tty)
 {
+        struct tty_bufhead *buf = &tty->port->buf;
         unsigned long flags;
-        spin_lock_irqsave(&tty->buf.lock, flags);
-        if (tty->buf.tail != NULL)
-                tty->buf.tail->commit = tty->buf.tail->used;
-        spin_unlock_irqrestore(&tty->buf.lock, flags);
+
+        spin_lock_irqsave(&buf->lock, flags);
+        if (buf->tail != NULL)
+                buf->tail->commit = buf->tail->used;
+        spin_unlock_irqrestore(&buf->lock, flags);
 
         if (tty->low_latency)
-                flush_to_ldisc(&tty->buf.work);
+                flush_to_ldisc(&buf->work);
         else
-                schedule_work(&tty->buf.work);
+                schedule_work(&buf->work);
 }
 EXPORT_SYMBOL(tty_flip_buffer_push);
 
@@ -555,13 +583,15 @@ EXPORT_SYMBOL(tty_flip_buffer_push);
  *      Locking: none
  */
 
-void tty_buffer_init(struct tty_struct *tty)
+void tty_buffer_init(struct tty_port *port)
 {
-        spin_lock_init(&tty->buf.lock);
-        tty->buf.head = NULL;
-        tty->buf.tail = NULL;
-        tty->buf.free = NULL;
-        tty->buf.memory_used = 0;
-        INIT_WORK(&tty->buf.work, flush_to_ldisc);
+        struct tty_bufhead *buf = &port->buf;
+
+        spin_lock_init(&buf->lock);
+        buf->head = NULL;
+        buf->tail = NULL;
+        buf->free = NULL;
+        buf->memory_used = 0;
+        INIT_WORK(&buf->work, flush_to_ldisc);
 }
 
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 2ea176b2280e..da9fde850754 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -186,7 +186,6 @@ void free_tty_struct(struct tty_struct *tty)
         if (tty->dev)
                 put_device(tty->dev);
         kfree(tty->write_buf);
-        tty_buffer_free_all(tty);
         tty->magic = 0xDEADDEAD;
         kfree(tty);
 }
@@ -237,7 +236,7 @@ void tty_free_file(struct file *file)
 }
 
 /* Delete file from its tty */
-void tty_del_file(struct file *file)
+static void tty_del_file(struct file *file)
 {
         struct tty_file_private *priv = file->private_data;
 
@@ -555,7 +554,7 @@ EXPORT_SYMBOL_GPL(tty_wakeup);
  *                tasklist_lock to walk task list for hangup event
  *                  ->siglock to protect ->signal/->sighand
  */
-void __tty_hangup(struct tty_struct *tty)
+static void __tty_hangup(struct tty_struct *tty)
 {
         struct file *cons_filp = NULL;
         struct file *filp, *f = NULL;
@@ -1417,6 +1416,8 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx)
                         "%s: %s driver does not set tty->port. This will crash the kernel later. Fix the driver!\n",
                         __func__, tty->driver->name);
 
+        tty->port->itty = tty;
+
         /*
          * Structures all installed ... call the ldisc open routines.
          * If we fail here just call release_tty to clean up.  No need
@@ -1552,6 +1553,7 @@ static void release_tty(struct tty_struct *tty, int idx)
                 tty->ops->shutdown(tty);
         tty_free_termios(tty);
         tty_driver_remove_tty(tty->driver, tty);
+        tty->port->itty = NULL;
 
         if (tty->link)
                 tty_kref_put(tty->link);
@@ -1625,7 +1627,6 @@ int tty_release(struct inode *inode, struct file *filp)
         struct tty_struct *tty = file_tty(filp);
         struct tty_struct *o_tty;
         int     pty_master, tty_closing, o_tty_closing, do_sleep;
-        int     devpts;
         int     idx;
         char    buf[64];
 
@@ -1640,7 +1641,6 @@ int tty_release(struct inode *inode, struct file *filp)
         idx = tty->index;
         pty_master = (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
                       tty->driver->subtype == PTY_TYPE_MASTER);
-        devpts = (tty->driver->flags & TTY_DRIVER_DEVPTS_MEM) != 0;
         /* Review: parallel close */
         o_tty = tty->link;
 
@@ -1799,9 +1799,6 @@ int tty_release(struct inode *inode, struct file *filp)
         release_tty(tty, idx);
         mutex_unlock(&tty_mutex);
 
-        /* Make this pty number available for reallocation */
-        if (devpts)
-                devpts_kill_index(inode, idx);
         return 0;
 }
 
@@ -2690,6 +2687,11 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
         case TIOCNXCL:
                 clear_bit(TTY_EXCLUSIVE, &tty->flags);
                 return 0;
+        case TIOCGEXCL:
+        {
+                int excl = test_bit(TTY_EXCLUSIVE, &tty->flags);
+                return put_user(excl, (int __user *)p);
+        }
         case TIOCNOTTY:
                 if (current->signal->tty != tty)
                         return -ENOTTY;
@@ -2937,19 +2939,13 @@ void initialize_tty_struct(struct tty_struct *tty,
         tty_ldisc_init(tty);
         tty->session = NULL;
         tty->pgrp = NULL;
-        tty->overrun_time = jiffies;
-        tty_buffer_init(tty);
         mutex_init(&tty->legacy_mutex);
         mutex_init(&tty->termios_mutex);
         mutex_init(&tty->ldisc_mutex);
         init_waitqueue_head(&tty->write_wait);
         init_waitqueue_head(&tty->read_wait);
         INIT_WORK(&tty->hangup_work, do_tty_hangup);
-        mutex_init(&tty->atomic_read_lock);
         mutex_init(&tty->atomic_write_lock);
-        mutex_init(&tty->output_lock);
-        mutex_init(&tty->echo_lock);
-        spin_lock_init(&tty->read_lock);
         spin_lock_init(&tty->ctrl_lock);
         INIT_LIST_HEAD(&tty->tty_files);
         INIT_WORK(&tty->SAK_work, do_SAK_work);
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index 12b1fa0f4f86..8481b29d5b3a 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -1118,7 +1118,6 @@ EXPORT_SYMBOL_GPL(tty_perform_flush);
 int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
                        unsigned int cmd, unsigned long arg)
 {
-        unsigned long flags;
         int retval;
 
         switch (cmd) {
@@ -1153,26 +1152,6 @@ int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
                 return 0;
         case TCFLSH:
                 return tty_perform_flush(tty, arg);
-        case TIOCPKT:
-        {
-                int pktmode;
-
-                if (tty->driver->type != TTY_DRIVER_TYPE_PTY ||
-                    tty->driver->subtype != PTY_TYPE_MASTER)
-                        return -ENOTTY;
-                if (get_user(pktmode, (int __user *) arg))
-                        return -EFAULT;
-                spin_lock_irqsave(&tty->ctrl_lock, flags);
-                if (pktmode) {
-                        if (!tty->packet) {
-                                tty->packet = 1;
-                                tty->link->ctrl_status = 0;
-                        }
-                } else
-                        tty->packet = 0;
-                spin_unlock_irqrestore(&tty->ctrl_lock, flags);
-                return 0;
-        }
         default:
                 /* Try the mode commands */
                 return tty_mode_ioctl(tty, file, cmd, arg);
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index 0f2a2c5e704c..c5782294e532 100644
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c
@@ -26,7 +26,7 @@
  *      callers who will do ldisc lookups and cannot sleep.
  */
 
-static DEFINE_SPINLOCK(tty_ldisc_lock);
+static DEFINE_RAW_SPINLOCK(tty_ldisc_lock);
 static DECLARE_WAIT_QUEUE_HEAD(tty_ldisc_wait);
 /* Line disc dispatch table */
 static struct tty_ldisc_ops *tty_ldiscs[NR_LDISCS];
@@ -49,21 +49,21 @@ static void put_ldisc(struct tty_ldisc *ld)
          * If this is the last user, free the ldisc, and
          * release the ldisc ops.
          *
-         * We really want an "atomic_dec_and_lock_irqsave()",
+         * We really want an "atomic_dec_and_raw_lock_irqsave()",
          * but we don't have it, so this does it by hand.
          */
-        local_irq_save(flags);
-        if (atomic_dec_and_lock(&ld->users, &tty_ldisc_lock)) {
+        raw_spin_lock_irqsave(&tty_ldisc_lock, flags);
+        if (atomic_dec_and_test(&ld->users)) {
                 struct tty_ldisc_ops *ldo = ld->ops;
 
                 ldo->refcount--;
                 module_put(ldo->owner);
-                spin_unlock_irqrestore(&tty_ldisc_lock, flags);
+                raw_spin_unlock_irqrestore(&tty_ldisc_lock, flags);
 
                 kfree(ld);
                 return;
         }
-        local_irq_restore(flags);
+        raw_spin_unlock_irqrestore(&tty_ldisc_lock, flags);
         wake_up(&ld->wq_idle);
 }
 
@@ -88,11 +88,11 @@ int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc)
         if (disc < N_TTY || disc >= NR_LDISCS)
                 return -EINVAL;
 
-        spin_lock_irqsave(&tty_ldisc_lock, flags);
+        raw_spin_lock_irqsave(&tty_ldisc_lock, flags);
         tty_ldiscs[disc] = new_ldisc;
         new_ldisc->num = disc;
         new_ldisc->refcount = 0;
-        spin_unlock_irqrestore(&tty_ldisc_lock, flags);
+        raw_spin_unlock_irqrestore(&tty_ldisc_lock, flags);
 
         return ret;
 }
@@ -118,12 +118,12 @@ int tty_unregister_ldisc(int disc)
         if (disc < N_TTY || disc >= NR_LDISCS)
                 return -EINVAL;
 
-        spin_lock_irqsave(&tty_ldisc_lock, flags);
+        raw_spin_lock_irqsave(&tty_ldisc_lock, flags);
         if (tty_ldiscs[disc]->refcount)
                 ret = -EBUSY;
         else
                 tty_ldiscs[disc] = NULL;
-        spin_unlock_irqrestore(&tty_ldisc_lock, flags);
+        raw_spin_unlock_irqrestore(&tty_ldisc_lock, flags);
 
         return ret;
 }
@@ -134,7 +134,7 @@ static struct tty_ldisc_ops *get_ldops(int disc)
         unsigned long flags;
         struct tty_ldisc_ops *ldops, *ret;
 
-        spin_lock_irqsave(&tty_ldisc_lock, flags);
+        raw_spin_lock_irqsave(&tty_ldisc_lock, flags);
         ret = ERR_PTR(-EINVAL);
         ldops = tty_ldiscs[disc];
         if (ldops) {
@@ -144,7 +144,7 @@ static struct tty_ldisc_ops *get_ldops(int disc)
                         ret = ldops;
                 }
         }
-        spin_unlock_irqrestore(&tty_ldisc_lock, flags);
+        raw_spin_unlock_irqrestore(&tty_ldisc_lock, flags);
         return ret;
 }
 
@@ -152,10 +152,10 @@ static void put_ldops(struct tty_ldisc_ops *ldops)
 {
         unsigned long flags;
 
-        spin_lock_irqsave(&tty_ldisc_lock, flags);
+        raw_spin_lock_irqsave(&tty_ldisc_lock, flags);
         ldops->refcount--;
         module_put(ldops->owner);
-        spin_unlock_irqrestore(&tty_ldisc_lock, flags);
+        raw_spin_unlock_irqrestore(&tty_ldisc_lock, flags);
 }
 
 /**
@@ -287,11 +287,11 @@ static struct tty_ldisc *tty_ldisc_try(struct tty_struct *tty)
         unsigned long flags;
         struct tty_ldisc *ld;
 
-        spin_lock_irqsave(&tty_ldisc_lock, flags);
+        raw_spin_lock_irqsave(&tty_ldisc_lock, flags);
         ld = NULL;
         if (test_bit(TTY_LDISC, &tty->flags))
                 ld = get_ldisc(tty->ldisc);
-        spin_unlock_irqrestore(&tty_ldisc_lock, flags);
+        raw_spin_unlock_irqrestore(&tty_ldisc_lock, flags);
         return ld;
 }
 
@@ -512,7 +512,7 @@ static void tty_ldisc_restore(struct tty_struct *tty, struct tty_ldisc *old)
 static int tty_ldisc_halt(struct tty_struct *tty)
 {
         clear_bit(TTY_LDISC, &tty->flags);
-        return cancel_work_sync(&tty->buf.work);
+        return cancel_work_sync(&tty->port->buf.work);
 }
 
 /**
@@ -525,7 +525,7 @@ static void tty_ldisc_flush_works(struct tty_struct *tty)
 {
         flush_work(&tty->hangup_work);
         flush_work(&tty->SAK_work);
-        flush_work(&tty->buf.work);
+        flush_work(&tty->port->buf.work);
 }
 
 /**
@@ -704,9 +704,9 @@ enable:
         /* Restart the work queue in case no characters kick it off. Safe if
            already running */
         if (work)
-                schedule_work(&tty->buf.work);
+                schedule_work(&tty->port->buf.work);
         if (o_work)
-                schedule_work(&o_tty->buf.work);
+                schedule_work(&o_tty->port->buf.work);
         mutex_unlock(&tty->ldisc_mutex);
         tty_unlock(tty);
         return retval;
@@ -817,7 +817,7 @@ void tty_ldisc_hangup(struct tty_struct *tty)
          */
         clear_bit(TTY_LDISC, &tty->flags);
         tty_unlock(tty);
-        cancel_work_sync(&tty->buf.work);
+        cancel_work_sync(&tty->port->buf.work);
         mutex_unlock(&tty->ldisc_mutex);
 retry:
         tty_lock(tty);
@@ -897,6 +897,11 @@ int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty)
 
 static void tty_ldisc_kill(struct tty_struct *tty)
 {
+        /* There cannot be users from userspace now. But there still might be
+         * drivers holding a reference via tty_ldisc_ref. Do not steal them the
+         * ldisc until they are done. */
+        tty_ldisc_wait_idle(tty, MAX_SCHEDULE_TIMEOUT);
+
         mutex_lock(&tty->ldisc_mutex);
         /*
          * Now kill off the ldisc
diff --git a/drivers/tty/tty_mutex.c b/drivers/tty/tty_mutex.c
index 67feac9e6ebb..2e41abebbcba 100644
--- a/drivers/tty/tty_mutex.c
+++ b/drivers/tty/tty_mutex.c
@@ -19,7 +19,7 @@ static void __lockfunc tty_lock_nested(struct tty_struct *tty,
                                        unsigned int subclass)
 {
         if (tty->magic != TTY_MAGIC) {
-                printk(KERN_ERR "L Bad %p\n", tty);
+                pr_err("L Bad %p\n", tty);
                 WARN_ON(1);
                 return;
         }
@@ -36,7 +36,7 @@ EXPORT_SYMBOL(tty_lock);
 void __lockfunc tty_unlock(struct tty_struct *tty)
 {
         if (tty->magic != TTY_MAGIC) {
-                printk(KERN_ERR "U Bad %p\n", tty);
+                pr_err("U Bad %p\n", tty);
                 WARN_ON(1);
                 return;
         }
diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
index d7bdd8d0c23f..b7ff59d3db88 100644
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -21,6 +21,7 @@
 void tty_port_init(struct tty_port *port)
 {
         memset(port, 0, sizeof(*port));
+        tty_buffer_init(port);
         init_waitqueue_head(&port->open_wait);
         init_waitqueue_head(&port->close_wait);
         init_waitqueue_head(&port->delta_msr_wait);
@@ -121,12 +122,27 @@ void tty_port_free_xmit_buf(struct tty_port *port)
 }
 EXPORT_SYMBOL(tty_port_free_xmit_buf);
 
+/**
+ * tty_port_destroy -- destroy inited port
+ * @port: tty port to be doestroyed
+ *
+ * When a port was initialized using tty_port_init, one has to destroy the
+ * port by this function. Either indirectly by using tty_port refcounting
+ * (tty_port_put) or directly if refcounting is not used.
+ */
+void tty_port_destroy(struct tty_port *port)
+{
+        tty_buffer_free_all(port);
+}
+EXPORT_SYMBOL(tty_port_destroy);
+
 static void tty_port_destructor(struct kref *kref)
 {
         struct tty_port *port = container_of(kref, struct tty_port, kref);
         if (port->xmit_buf)
                 free_page((unsigned long)port->xmit_buf);
-        if (port->ops->destruct)
+        tty_port_destroy(port);
+        if (port->ops && port->ops->destruct)
                 port->ops->destruct(port);
         else
                 kfree(port);
diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c
index 2aaa0c228409..248381b30722 100644
--- a/drivers/tty/vt/consolemap.c
+++ b/drivers/tty/vt/consolemap.c
@@ -410,10 +410,8 @@ static void con_release_unimap(struct uni_pagedir *p)
                 kfree(p->inverse_translations[i]);
                 p->inverse_translations[i] = NULL;
         }
-        if (p->inverse_trans_unicode) {
-                kfree(p->inverse_trans_unicode);
-                p->inverse_trans_unicode = NULL;
-        }
+        kfree(p->inverse_trans_unicode);
+        p->inverse_trans_unicode = NULL;
 }
 
 /* Caller must hold the console lock */
diff --git a/drivers/tty/vt/selection.c b/drivers/tty/vt/selection.c
index 8e9b4be97a2d..60b7b6926059 100644
--- a/drivers/tty/vt/selection.c
+++ b/drivers/tty/vt/selection.c
@@ -341,15 +341,11 @@ int paste_selection(struct tty_struct *tty)
         struct  tty_ldisc *ld;
         DECLARE_WAITQUEUE(wait, current);
 
-
         console_lock();
         poke_blanked_console();
         console_unlock();
 
-        /* FIXME: wtf is this supposed to achieve ? */
-        ld = tty_ldisc_ref(tty);
-        if (!ld)
-                ld = tty_ldisc_ref_wait(tty);
+        ld = tty_ldisc_ref_wait(tty);
 
         /* FIXME: this is completely unsafe */
         add_wait_queue(&vc->paste_wait, &wait);
@@ -361,8 +357,7 @@ int paste_selection(struct tty_struct *tty)
                 }
                 count = sel_buffer_lth - pasted;
                 count = min(count, tty->receive_room);
-                tty->ldisc->ops->receive_buf(tty, sel_buffer + pasted,
-                                                                NULL, count);
+                ld->ops->receive_buf(tty, sel_buffer + pasted, NULL, count);
                 pasted += count;
         }
         remove_wait_queue(&vc->paste_wait, &wait);
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 4e0d0c3734b3..8fd89687d068 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -779,6 +779,7 @@ int vc_allocate(unsigned int currcons)	/* return 0 on success */
                 con_set_default_unimap(vc);
             vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL);
             if (!vc->vc_screenbuf) {
+                tty_port_destroy(&vc->port);
                 kfree(vc);
                 vc_cons[currcons].d = NULL;
                 return -ENOMEM;
@@ -999,8 +1000,10 @@ void vc_deallocate(unsigned int currcons)
                 put_pid(vc->vt_pid);
                 module_put(vc->vc_sw->owner);
                 kfree(vc->vc_screenbuf);
-                if (currcons >= MIN_NR_CONSOLES)
+                if (currcons >= MIN_NR_CONSOLES) {
+                        tty_port_destroy(&vc->port);
                         kfree(vc);
+                }
                 vc_cons[currcons].d = NULL;
         }
 }
diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index b841f56d2e66..98ff1735eafc 100644
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -25,6 +25,7 @@
 #include <linux/console.h>
 #include <linux/consolemap.h>
 #include <linux/signal.h>
+#include <linux/suspend.h>
 #include <linux/timex.h>
 
 #include <asm/io.h>
diff --git a/drivers/usb/gadget/u_serial.c b/drivers/usb/gadget/u_serial.c
index f1739526820f..d0f95482f40e 100644
--- a/drivers/usb/gadget/u_serial.c
+++ b/drivers/usb/gadget/u_serial.c
@@ -1145,8 +1145,10 @@ int gserial_setup(struct usb_gadget *g, unsigned count)
 
         return status;
 fail:
-        while (count--)
+        while (count--) {
+                tty_port_destroy(&ports[count].port->port);
                 kfree(ports[count].port);
+        }
         put_tty_driver(gs_tty_driver);
         gs_tty_driver = NULL;
         return status;
@@ -1200,6 +1202,7 @@ void gserial_cleanup(void)
 
                 WARN_ON(port->port_usb != NULL);
 
+                tty_port_destroy(&port->port);
                 kfree(port);
         }
         n_ports = 0;
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 73b8e0569164..64bda135ba7e 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -597,6 +597,7 @@ static void port_release(struct device *dev)
         kfifo_free(&port->write_fifo);
         kfree(port->interrupt_in_buffer);
         kfree(port->interrupt_out_buffer);
+        tty_port_destroy(&port->port);
         kfree(port);
 }
 
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 4c6285fff598..e2f57a007029 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -844,6 +844,9 @@ COMPATIBLE_IOCTL(TIOCGDEV)
 COMPATIBLE_IOCTL(TIOCCBRK)
 COMPATIBLE_IOCTL(TIOCGSID)
 COMPATIBLE_IOCTL(TIOCGICOUNT)
+COMPATIBLE_IOCTL(TIOCGPKT)
+COMPATIBLE_IOCTL(TIOCGPTLCK)
+COMPATIBLE_IOCTL(TIOCGEXCL)
 /* Little t */
 COMPATIBLE_IOCTL(TIOCGETD)
 COMPATIBLE_IOCTL(TIOCSETD)
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 14afbabe6546..472e6befc54d 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -545,37 +545,38 @@ void devpts_kill_index(struct inode *ptmx_inode, int idx)
         mutex_unlock(&allocated_ptys_lock);
 }
 
-int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
+/**
+ * devpts_pty_new -- create a new inode in /dev/pts/
+ * @ptmx_inode: inode of the master
+ * @device: major+minor of the node to be created
+ * @index: used as a name of the node
+ * @priv: what's given back by devpts_get_priv
+ *
+ * The created inode is returned. Remove it from /dev/pts/ by devpts_pty_kill.
+ */
+struct inode *devpts_pty_new(struct inode *ptmx_inode, dev_t device, int index,
+                void *priv)
 {
-        /* tty layer puts index from devpts_new_index() in here */
-        int number = tty->index;
-        struct tty_driver *driver = tty->driver;
-        dev_t device = MKDEV(driver->major, driver->minor_start+number);
         struct dentry *dentry;
         struct super_block *sb = pts_sb_from_inode(ptmx_inode);
-        struct inode *inode = new_inode(sb);
+        struct inode *inode;
         struct dentry *root = sb->s_root;
         struct pts_fs_info *fsi = DEVPTS_SB(sb);
         struct pts_mount_opts *opts = &fsi->mount_opts;
-        int ret = 0;
         char s[12];
 
-        /* We're supposed to be given the slave end of a pty */
-        BUG_ON(driver->type != TTY_DRIVER_TYPE_PTY);
-        BUG_ON(driver->subtype != PTY_TYPE_SLAVE);
-
+        inode = new_inode(sb);
         if (!inode)
-                return -ENOMEM;
+                return ERR_PTR(-ENOMEM);
 
-        inode->i_ino = number + 3;
+        inode->i_ino = index + 3;
         inode->i_uid = opts->setuid ? opts->uid : current_fsuid();
         inode->i_gid = opts->setgid ? opts->gid : current_fsgid();
         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
         init_special_inode(inode, S_IFCHR|opts->mode, device);
-        inode->i_private = tty;
-        tty->driver_data = inode;
+        inode->i_private = priv;
 
-        sprintf(s, "%d", number);
+        sprintf(s, "%d", index);
 
         mutex_lock(&root->d_inode->i_mutex);
 
@@ -585,18 +586,24 @@ int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
                 fsnotify_create(root->d_inode, dentry);
         } else {
                 iput(inode);
-                ret = -ENOMEM;
+                inode = ERR_PTR(-ENOMEM);
         }
 
         mutex_unlock(&root->d_inode->i_mutex);
 
-        return ret;
+        return inode;
 }
 
-struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number)
+/**
+ * devpts_get_priv -- get private data for a slave
+ * @pts_inode: inode of the slave
+ *
+ * Returns whatever was passed as priv in devpts_pty_new for a given inode.
+ */
+void *devpts_get_priv(struct inode *pts_inode)
 {
         struct dentry *dentry;
-        struct tty_struct *tty;
+        void *priv = NULL;
 
         BUG_ON(pts_inode->i_rdev == MKDEV(TTYAUX_MAJOR, PTMX_MINOR));
 
@@ -605,18 +612,22 @@ struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number)
         if (!dentry)
                 return NULL;
 
-        tty = NULL;
         if (pts_inode->i_sb->s_magic == DEVPTS_SUPER_MAGIC)
-                tty = (struct tty_struct *)pts_inode->i_private;
+                priv = pts_inode->i_private;
 
         dput(dentry);
 
-        return tty;
+        return priv;
 }
 
-void devpts_pty_kill(struct tty_struct *tty)
+/**
+ * devpts_pty_kill -- remove inode form /dev/pts/
+ * @inode: inode of the slave to be removed
+ *
+ * This is an inverse operation of devpts_pty_new.
+ */
+void devpts_pty_kill(struct inode *inode)
 {
-        struct inode *inode = tty->driver_data;
         struct super_block *sb = pts_sb_from_inode(inode);
         struct dentry *root = sb->s_root;
         struct dentry *dentry;
diff --git a/include/linux/devpts_fs.h b/include/linux/devpts_fs.h
index 5ce0e5fd712e..251a2090a554 100644
--- a/include/linux/devpts_fs.h
+++ b/include/linux/devpts_fs.h
@@ -20,28 +20,28 @@
 int devpts_new_index(struct inode *ptmx_inode);
 void devpts_kill_index(struct inode *ptmx_inode, int idx);
 /* mknod in devpts */
-int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty);
-/* get tty structure */
-struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number);
+struct inode *devpts_pty_new(struct inode *ptmx_inode, dev_t device, int index,
+                void *priv);
+/* get private structure */
+void *devpts_get_priv(struct inode *pts_inode);
 /* unlink */
-void devpts_pty_kill(struct tty_struct *tty);
+void devpts_pty_kill(struct inode *inode);
 
 #else
 
 /* Dummy stubs in the no-pty case */
 static inline int devpts_new_index(struct inode *ptmx_inode) { return -EINVAL; }
 static inline void devpts_kill_index(struct inode *ptmx_inode, int idx) { }
-static inline int devpts_pty_new(struct inode *ptmx_inode,
-                                struct tty_struct *tty)
+static inline struct inode *devpts_pty_new(struct inode *ptmx_inode,
+                dev_t device, int index, void *priv)
 {
-        return -EINVAL;
+        return ERR_PTR(-EINVAL);
 }
-static inline struct tty_struct *devpts_get_tty(struct inode *pts_inode,
-                int number)
+static inline void *devpts_get_priv(struct inode *pts_inode)
 {
         return NULL;
 }
-static inline void devpts_pty_kill(struct tty_struct *tty) { }
+static inline void devpts_pty_kill(struct inode *inode) { }
 
 #endif
 
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 9d36b829533a..0f8447376ddb 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -1985,6 +1985,9 @@
 #define PCI_DEVICE_ID_EXAR_XR17C152     0x0152
 #define PCI_DEVICE_ID_EXAR_XR17C154     0x0154
 #define PCI_DEVICE_ID_EXAR_XR17C158     0x0158
+#define PCI_DEVICE_ID_EXAR_XR17V352     0x0352
+#define PCI_DEVICE_ID_EXAR_XR17V354     0x0354
+#define PCI_DEVICE_ID_EXAR_XR17V358     0x0358
 
 #define PCI_VENDOR_ID_MICROGATE         0x13c0
 #define PCI_DEVICE_ID_MICROGATE_USC     0x0010
@@ -2323,6 +2326,8 @@
 
 #define PCI_VENDOR_ID_TOPSPIN           0x1867
 
+#define PCI_VENDOR_ID_COMMTECH          0x18f7
+
 #define PCI_VENDOR_ID_SILAN             0x1904
 
 #define PCI_VENDOR_ID_RENESAS           0x1912
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index c174c90fb3fb..c490d20b3fb8 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -105,6 +105,8 @@ extern int early_serial_setup(struct uart_port *port);
 
 extern int serial8250_find_port(struct uart_port *p);
 extern int serial8250_find_port_for_earlycon(void);
+extern unsigned int serial8250_early_in(struct uart_port *port, int offset);
+extern void serial8250_early_out(struct uart_port *port, int offset, int value);
 extern int setup_early_serial8250_console(char *cmdline);
 extern void serial8250_do_set_termios(struct uart_port *port,
                 struct ktermios *termios, struct ktermios *old);
diff --git a/include/linux/tty.h b/include/linux/tty.h
index f0b4eb47297c..8db1b569c37a 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -188,7 +188,9 @@ struct tty_port_operations {
 };
         
 struct tty_port {
+        struct tty_bufhead      buf;            /* Locked internally */
         struct tty_struct       *tty;           /* Back pointer */
+        struct tty_struct       *itty;          /* internal back ptr */
         const struct tty_port_operations *ops;  /* Port operations */
         spinlock_t              lock;           /* Lock protecting tty field */
         int                     blocked_open;   /* Waiting to open */
@@ -197,6 +199,9 @@ struct tty_port {
         wait_queue_head_t       close_wait;     /* Close waiters */
         wait_queue_head_t       delta_msr_wait; /* Modem status change */
         unsigned long           flags;          /* TTY flags ASY_*/
+        unsigned long           iflags;         /* TTYP_ internal flags */
+#define TTYP_FLUSHING                   1  /* Flushing to ldisc in progress */
+#define TTYP_FLUSHPENDING               2  /* Queued buffer flush pending */
         unsigned char           console:1;      /* port is a console */
         struct mutex            mutex;          /* Locking */
         struct mutex            buf_mutex;      /* Buffer alloc lock */
@@ -235,6 +240,7 @@ struct tty_struct {
         struct mutex ldisc_mutex;
         struct tty_ldisc *ldisc;
 
+        struct mutex atomic_write_lock;
         struct mutex legacy_mutex;
         struct mutex termios_mutex;
         spinlock_t ctrl_lock;
@@ -254,7 +260,6 @@ struct tty_struct {
 
         struct tty_struct *link;
         struct fasync_struct *fasync;
-        struct tty_bufhead buf;         /* Locked internally */
         int alt_speed;          /* For magic substitution of 38400 bps */
         wait_queue_head_t write_wait;
         wait_queue_head_t read_wait;
@@ -265,37 +270,10 @@ struct tty_struct {
 
 #define N_TTY_BUF_SIZE 4096
 
-        /*
-         * The following is data for the N_TTY line discipline.  For
-         * historical reasons, this is included in the tty structure.
-         * Mostly locked by the BKL.
-         */
-        unsigned int column;
-        unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
         unsigned char closing:1;
-        unsigned char echo_overrun:1;
         unsigned short minimum_to_wake;
-        unsigned long overrun_time;
-        int num_overrun;
-        unsigned long process_char_map[256/(8*sizeof(unsigned long))];
-        char *read_buf;
-        int read_head;
-        int read_tail;
-        int read_cnt;
-        unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
-        unsigned char *echo_buf;
-        unsigned int echo_pos;
-        unsigned int echo_cnt;
-        int canon_data;
-        unsigned long canon_head;
-        unsigned int canon_column;
-        struct mutex atomic_read_lock;
-        struct mutex atomic_write_lock;
-        struct mutex output_lock;
-        struct mutex echo_lock;
         unsigned char *write_buf;
         int write_cnt;
-        spinlock_t read_lock;
         /* If the tty has a pending do_SAK, queue it here - akpm */
         struct work_struct SAK_work;
         struct tty_port *port;
@@ -335,8 +313,6 @@ struct tty_file_private {
 #define TTY_PTY_LOCK            16      /* pty private */
 #define TTY_NO_WRITE_SPLIT      17      /* Preserve write boundaries to driver */
 #define TTY_HUPPED              18      /* Post driver->hangup() */
-#define TTY_FLUSHING            19      /* Flushing to ldisc in progress */
-#define TTY_FLUSHPENDING        20      /* Queued buffer flush pending */
 #define TTY_HUPPING             21      /* ->hangup() in progress */
 
 #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
@@ -412,9 +388,9 @@ extern void disassociate_ctty(int priv);
 extern void no_tty(void);
 extern void tty_flip_buffer_push(struct tty_struct *tty);
 extern void tty_flush_to_ldisc(struct tty_struct *tty);
-extern void tty_buffer_free_all(struct tty_struct *tty);
+extern void tty_buffer_free_all(struct tty_port *port);
 extern void tty_buffer_flush(struct tty_struct *tty);
-extern void tty_buffer_init(struct tty_struct *tty);
+extern void tty_buffer_init(struct tty_port *port);
 extern speed_t tty_get_baud_rate(struct tty_struct *tty);
 extern speed_t tty_termios_baud_rate(struct ktermios *termios);
 extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
@@ -479,6 +455,7 @@ extern struct device *tty_port_register_device_attr(struct tty_port *port,
                 const struct attribute_group **attr_grp);
 extern int tty_port_alloc_xmit_buf(struct tty_port *port);
 extern void tty_port_free_xmit_buf(struct tty_port *port);
+extern void tty_port_destroy(struct tty_port *port);
 extern void tty_port_put(struct tty_port *port);
 
 static inline struct tty_port *tty_port_get(struct tty_port *port)
@@ -535,7 +512,7 @@ extern void n_tty_inherit_ops(struct tty_ldisc_ops *ops);
 /* tty_audit.c */
 #ifdef CONFIG_AUDIT
 extern void tty_audit_add_data(struct tty_struct *tty, unsigned char *data,
-                               size_t size);
+                               size_t size, unsigned icanon);
 extern void tty_audit_exit(void);
 extern void tty_audit_fork(struct signal_struct *sig);
 extern void tty_audit_tiocsti(struct tty_struct *tty, char ch);
@@ -544,7 +521,7 @@ extern int tty_audit_push_task(struct task_struct *tsk,
                                kuid_t loginuid, u32 sessionid);
 #else
 static inline void tty_audit_add_data(struct tty_struct *tty,
-                                      unsigned char *data, size_t size)
+                unsigned char *data, size_t size, unsigned icanon)
 {
 }
 static inline void tty_audit_tiocsti(struct tty_struct *tty, char ch)
diff --git a/include/linux/tty_flip.h b/include/linux/tty_flip.h
index 9239d033a0a3..2002344ed36a 100644
--- a/include/linux/tty_flip.h
+++ b/include/linux/tty_flip.h
@@ -11,7 +11,7 @@ void tty_schedule_flip(struct tty_struct *tty);
 static inline int tty_insert_flip_char(struct tty_struct *tty,
                                         unsigned char ch, char flag)
 {
-        struct tty_buffer *tb = tty->buf.tail;
+        struct tty_buffer *tb = tty->port->buf.tail;
         if (tb && tb->used < tb->size) {
                 tb->flag_buf_ptr[tb->used] = flag;
                 tb->char_buf_ptr[tb->used++] = ch;
diff --git a/include/uapi/asm-generic/ioctls.h b/include/uapi/asm-generic/ioctls.h
index 199975fac395..143dacbb7d9a 100644
--- a/include/uapi/asm-generic/ioctls.h
+++ b/include/uapi/asm-generic/ioctls.h
@@ -74,6 +74,9 @@
 #define TCSETXW         0x5435
 #define TIOCSIG         _IOW('T', 0x36, int)  /* pty: generate signal */
 #define TIOCVHANGUP     0x5437
+#define TIOCGPKT        _IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK      _IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL       _IOR('T', 0x40, int) /* Get exclusive mode state */
 
 #define FIONCLEX        0x5450
 #define FIOCLEX         0x5451
diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h
index 7e1ab20adc03..78f99d97475b 100644
--- a/include/uapi/linux/serial_core.h
+++ b/include/uapi/linux/serial_core.h
@@ -49,7 +49,8 @@
 #define PORT_XR17D15X   21      /* Exar XR17D15x UART */
 #define PORT_LPC3220    22      /* NXP LPC32xx SoC "Standard" UART */
 #define PORT_8250_CIR   23      /* CIR infrared port, has its own driver */
-#define PORT_MAX_8250   23      /* max port ID */
+#define PORT_XR17V35X   24      /* Exar XR17V35x UARTs */
+#define PORT_MAX_8250   24      /* max port ID */
 
 /*
  * ARM specific type numbers.  These are not currently guaranteed
@@ -215,5 +216,7 @@
 /* Energy Micro efm32 SoC */
 #define PORT_EFMUART   100
 
+/* ARC (Synopsys) on-chip UART */
+#define PORT_ARC       101
 
 #endif /* _UAPILINUX_SERIAL_CORE_H */
diff --git a/include/uapi/linux/serial_reg.h b/include/uapi/linux/serial_reg.h
index 5ed325e88a81..e6322605b138 100644
--- a/include/uapi/linux/serial_reg.h
+++ b/include/uapi/linux/serial_reg.h
@@ -367,5 +367,23 @@
 #define UART_OMAP_MDR1_CIR_MODE         0x06    /* CIR mode */
 #define UART_OMAP_MDR1_DISABLE          0x07    /* Disable (default state) */
 
+/*
+ * These are definitions for the Exar XR17V35X and XR17(C|D)15X
+ */
+#define UART_EXAR_8XMODE        0x88    /* 8X sampling rate select */
+#define UART_EXAR_SLEEP         0x8b    /* Sleep mode */
+#define UART_EXAR_DVID          0x8d    /* Device identification */
+
+#define UART_EXAR_FCTR          0x08    /* Feature Control Register */
+#define UART_FCTR_EXAR_IRDA     0x08    /* IrDa data encode select */
+#define UART_FCTR_EXAR_485      0x10    /* Auto 485 half duplex dir ctl */
+#define UART_FCTR_EXAR_TRGA     0x00    /* FIFO trigger table A */
+#define UART_FCTR_EXAR_TRGB     0x60    /* FIFO trigger table B */
+#define UART_FCTR_EXAR_TRGC     0x80    /* FIFO trigger table C */
+#define UART_FCTR_EXAR_TRGD     0xc0    /* FIFO trigger table D programmable */
+
+#define UART_EXAR_TXTRG         0x0a    /* Tx FIFO trigger level write-only */
+#define UART_EXAR_RXTRG         0x0b    /* Rx FIFO trigger level write-only */
+
 #endif /* _LINUX_SERIAL_REG_H */
 
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 2f186ed80c40..fc7376bf86ea 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1159,7 +1159,7 @@ void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
         cred = current_cred();
 
         spin_lock_irq(&tsk->sighand->siglock);
-        if (tsk->signal && tsk->signal->tty && tsk->signal->tty->name)
+        if (tsk->signal && tsk->signal->tty)
                 tty = tsk->signal->tty->name;
         else
                 tty = "(none)";
diff --git a/kernel/printk.c b/kernel/printk.c
index 2d607f4d1797..22e070f3470a 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -87,6 +87,12 @@ static DEFINE_SEMAPHORE(console_sem);
 struct console *console_drivers;
 EXPORT_SYMBOL_GPL(console_drivers);
 
+#ifdef CONFIG_LOCKDEP
+static struct lockdep_map console_lock_dep_map = {
+        .name = "console_lock"
+};
+#endif
+
 /*
  * This is used for debugging the mess that is the VT code by
  * keeping track if we have the console semaphore held. It's
@@ -1908,12 +1914,14 @@ static int __cpuinit console_cpu_notify(struct notifier_block *self,
  */
 void console_lock(void)
 {
-        BUG_ON(in_interrupt());
+        might_sleep();
+
         down(&console_sem);
         if (console_suspended)
                 return;
         console_locked = 1;
         console_may_schedule = 1;
+        mutex_acquire(&console_lock_dep_map, 0, 0, _RET_IP_);
 }
 EXPORT_SYMBOL(console_lock);
 
@@ -1935,6 +1943,7 @@ int console_trylock(void)
         }
         console_locked = 1;
         console_may_schedule = 0;
+        mutex_acquire(&console_lock_dep_map, 0, 1, _RET_IP_);
         return 1;
 }
 EXPORT_SYMBOL(console_trylock);
@@ -2095,6 +2104,7 @@ skip:
                 local_irq_restore(flags);
         }
         console_locked = 0;
+        mutex_release(&console_lock_dep_map, 1, _RET_IP_);
 
         /* Release the exclusive_console once it is used */
         if (unlikely(exclusive_console))
diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
index 496ce2cebcd7..a68c88cdec6e 100644
--- a/net/irda/ircomm/ircomm_tty.c
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -183,6 +183,7 @@ static void __exit __ircomm_tty_cleanup(struct ircomm_tty_cb *self)
         ircomm_tty_shutdown(self);
 
         self->magic = 0;
+        tty_port_destroy(&self->port);
         kfree(self);
 }