6 files changed, 275 insertions, 42 deletions

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 301313002f6b..f94109cbb46e 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -129,7 +129,16 @@ struct uart_8250_port {
         unsigned char           mcr;
         unsigned char           mcr_mask;       /* mask of user bits */
         unsigned char           mcr_force;      /* mask of forced bits */
-        unsigned char           lsr_break_flag;
+
+        /*
+         * Some bits in registers are cleared on a read, so they must
+         * be saved whenever the register is read but the bits will not
+         * be immediately processed.
+         */
+#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS
+        unsigned char           lsr_saved_flags;
+#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
+        unsigned char           msr_saved_flags;
 
         /*
          * We provide a per-port pm hook.
@@ -1238,6 +1247,7 @@ static void serial8250_start_tx(struct uart_port *port)
                 if (up->bugs & UART_BUG_TXEN) {
                         unsigned char lsr, iir;
                         lsr = serial_in(up, UART_LSR);
+                        up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS;
                         iir = serial_in(up, UART_IIR) & 0x0f;
                         if ((up->port.type == PORT_RM9000) ?
                                 (lsr & UART_LSR_THRE &&
@@ -1290,18 +1300,10 @@ receive_chars(struct uart_8250_port *up, unsigned int *status)
                 flag = TTY_NORMAL;
                 up->port.icount.rx++;
 
-#ifdef CONFIG_SERIAL_8250_CONSOLE
-                /*
-                 * Recover the break flag from console xmit
-                 */
-                if (up->port.line == up->port.cons->index) {
-                        lsr |= up->lsr_break_flag;
-                        up->lsr_break_flag = 0;
-                }
-#endif
+                lsr |= up->lsr_saved_flags;
+                up->lsr_saved_flags = 0;
 
-                if (unlikely(lsr & (UART_LSR_BI | UART_LSR_PE |
-                                    UART_LSR_FE | UART_LSR_OE))) {
+                if (unlikely(lsr & UART_LSR_BRK_ERROR_BITS)) {
                         /*
                          * For statistics only
                          */
@@ -1392,6 +1394,8 @@ static unsigned int check_modem_status(struct uart_8250_port *up)
 {
         unsigned int status = serial_in(up, UART_MSR);
 
+        status |= up->msr_saved_flags;
+        up->msr_saved_flags = 0;
         if (status & UART_MSR_ANY_DELTA && up->ier & UART_IER_MSI &&
             up->port.info != NULL) {
                 if (status & UART_MSR_TERI)
@@ -1591,7 +1595,8 @@ static void serial8250_timeout(unsigned long data)
 static void serial8250_backup_timeout(unsigned long data)
 {
         struct uart_8250_port *up = (struct uart_8250_port *)data;
-        unsigned int iir, ier = 0;
+        unsigned int iir, ier = 0, lsr;
+        unsigned long flags;
 
         /*
          * Must disable interrupts or else we risk racing with the interrupt
@@ -1610,9 +1615,13 @@ static void serial8250_backup_timeout(unsigned long data)
          * the "Diva" UART used on the management processor on many HP
          * ia64 and parisc boxes.
          */
+        spin_lock_irqsave(&up->port.lock, flags);
+        lsr = serial_in(up, UART_LSR);
+        up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS;
+        spin_unlock_irqrestore(&up->port.lock, flags);
         if ((iir & UART_IIR_NO_INT) && (up->ier & UART_IER_THRI) &&
             (!uart_circ_empty(&up->port.info->xmit) || up->port.x_char) &&
-            (serial_in(up, UART_LSR) & UART_LSR_THRE)) {
+            (lsr & UART_LSR_THRE)) {
                 iir &= ~(UART_IIR_ID | UART_IIR_NO_INT);
                 iir |= UART_IIR_THRI;
         }
@@ -1631,13 +1640,14 @@ static unsigned int serial8250_tx_empty(struct uart_port *port)
 {
         struct uart_8250_port *up = (struct uart_8250_port *)port;
         unsigned long flags;
-        unsigned int ret;
+        unsigned int lsr;
 
         spin_lock_irqsave(&up->port.lock, flags);
-        ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
+        lsr = serial_in(up, UART_LSR);
+        up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS;
         spin_unlock_irqrestore(&up->port.lock, flags);
 
-        return ret;
+        return lsr & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
 }
 
 static unsigned int serial8250_get_mctrl(struct uart_port *port)
@@ -1708,8 +1718,7 @@ static inline void wait_for_xmitr(struct uart_8250_port *up, int bits)
         do {
                 status = serial_in(up, UART_LSR);
 
-                if (status & UART_LSR_BI)
-                        up->lsr_break_flag = UART_LSR_BI;
+                up->lsr_saved_flags |= status & LSR_SAVE_FLAGS;
 
                 if (--tmout == 0)
                         break;
@@ -1718,8 +1727,12 @@ static inline void wait_for_xmitr(struct uart_8250_port *up, int bits)
 
         /* Wait up to 1s for flow control if necessary */
         if (up->port.flags & UPF_CONS_FLOW) {
-                tmout = 1000000;
-                while (!(serial_in(up, UART_MSR) & UART_MSR_CTS) && --tmout) {
+                unsigned int tmout;
+                for (tmout = 1000000; tmout; tmout--) {
+                        unsigned int msr = serial_in(up, UART_MSR);
+                        up->msr_saved_flags |= msr & MSR_SAVE_FLAGS;
+                        if (msr & UART_MSR_CTS)
+                                break;
                         udelay(1);
                         touch_nmi_watchdog();
                 }
@@ -1889,6 +1902,18 @@ static int serial8250_startup(struct uart_port *port)
         spin_unlock_irqrestore(&up->port.lock, flags);
 
         /*
+         * Clear the interrupt registers again for luck, and clear the
+         * saved flags to avoid getting false values from polling
+         * routines or the previous session.
+         */
+        serial_inp(up, UART_LSR);
+        serial_inp(up, UART_RX);
+        serial_inp(up, UART_IIR);
+        serial_inp(up, UART_MSR);
+        up->lsr_saved_flags = 0;
+        up->msr_saved_flags = 0;
+
+        /*
          * Finally, enable interrupts.  Note: Modem status interrupts
          * are set via set_termios(), which will be occurring imminently
          * anyway, so we don't enable them here.
@@ -1906,14 +1931,6 @@ static int serial8250_startup(struct uart_port *port)
                 (void) inb_p(icp);
         }
 
-        /*
-         * And clear the interrupt registers again for luck.
-         */
-        (void) serial_inp(up, UART_LSR);
-        (void) serial_inp(up, UART_RX);
-        (void) serial_inp(up, UART_IIR);
-        (void) serial_inp(up, UART_MSR);
-
         return 0;
 }
 
@@ -2484,6 +2501,16 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
         wait_for_xmitr(up, BOTH_EMPTY);
         serial_out(up, UART_IER, ier);
 
+        /*
+         *      The receive handling will happen properly because the
+         *      receive ready bit will still be set; it is not cleared
+         *      on read.  However, modem control will not, we must
+         *      call it if we have saved something in the saved flags
+         *      while processing with interrupts off.
+         */
+        if (up->msr_saved_flags)
+                check_modem_status(up);
+
         if (locked)
                 spin_unlock(&up->port.lock);
         local_irq_restore(flags);
diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c
index 5e485876f54c..bd66339f7a3f 100644
--- a/drivers/serial/8250_pci.c
+++ b/drivers/serial/8250_pci.c
@@ -580,6 +580,138 @@ static int pci_netmos_init(struct pci_dev *dev)
         return num_serial;
 }
 
+/*
+ * ITE support by Niels de Vos <niels.devos@wincor-nixdorf.com>
+ *
+ * These chips are available with optionally one parallel port and up to
+ * two serial ports. Unfortunately they all have the same product id.
+ *
+ * Basic configuration is done over a region of 32 I/O ports. The base
+ * ioport is called INTA or INTC, depending on docs/other drivers.
+ *
+ * The region of the 32 I/O ports is configured in POSIO0R...
+ */
+
+/* registers */
+#define ITE_887x_MISCR          0x9c
+#define ITE_887x_INTCBAR        0x78
+#define ITE_887x_UARTBAR        0x7c
+#define ITE_887x_PS0BAR         0x10
+#define ITE_887x_POSIO0         0x60
+
+/* I/O space size */
+#define ITE_887x_IOSIZE         32
+/* I/O space size (bits 26-24; 8 bytes = 011b) */
+#define ITE_887x_POSIO_IOSIZE_8         (3 << 24)
+/* I/O space size (bits 26-24; 32 bytes = 101b) */
+#define ITE_887x_POSIO_IOSIZE_32        (5 << 24)
+/* Decoding speed (1 = slow, 2 = medium, 3 = fast) */
+#define ITE_887x_POSIO_SPEED            (3 << 29)
+/* enable IO_Space bit */
+#define ITE_887x_POSIO_ENABLE           (1 << 31)
+
+static int __devinit pci_ite887x_init(struct pci_dev *dev)
+{
+        /* inta_addr are the configuration addresses of the ITE */
+        static const short inta_addr[] = { 0x2a0, 0x2c0, 0x220, 0x240, 0x1e0,
+                                                        0x200, 0x280, 0 };
+        int ret, i, type;
+        struct resource *iobase = NULL;
+        u32 miscr, uartbar, ioport;
+
+        /* search for the base-ioport */
+        i = 0;
+        while (inta_addr[i] && iobase == NULL) {
+                iobase = request_region(inta_addr[i], ITE_887x_IOSIZE,
+                                                                "ite887x");
+                if (iobase != NULL) {
+                        /* write POSIO0R - speed | size | ioport */
+                        pci_write_config_dword(dev, ITE_887x_POSIO0,
+                                ITE_887x_POSIO_ENABLE | ITE_887x_POSIO_SPEED |
+                                ITE_887x_POSIO_IOSIZE_32 | inta_addr[i]);
+                        /* write INTCBAR - ioport */
+                        pci_write_config_dword(dev, ITE_887x_INTCBAR, inta_addr[i]);
+                        ret = inb(inta_addr[i]);
+                        if (ret != 0xff) {
+                                /* ioport connected */
+                                break;
+                        }
+                        release_region(iobase->start, ITE_887x_IOSIZE);
+                        iobase = NULL;
+                }
+                i++;
+        }
+
+        if (!inta_addr[i]) {
+                printk(KERN_ERR "ite887x: could not find iobase\n");
+                return -ENODEV;
+        }
+
+        /* start of undocumented type checking (see parport_pc.c) */
+        type = inb(iobase->start + 0x18) & 0x0f;
+
+        switch (type) {
+        case 0x2:       /* ITE8871 (1P) */
+        case 0xa:       /* ITE8875 (1P) */
+                ret = 0;
+                break;
+        case 0xe:       /* ITE8872 (2S1P) */
+                ret = 2;
+                break;
+        case 0x6:       /* ITE8873 (1S) */
+                ret = 1;
+                break;
+        case 0x8:       /* ITE8874 (2S) */
+                ret = 2;
+                break;
+        default:
+                moan_device("Unknown ITE887x", dev);
+                ret = -ENODEV;
+        }
+
+        /* configure all serial ports */
+        for (i = 0; i < ret; i++) {
+                /* read the I/O port from the device */
+                pci_read_config_dword(dev, ITE_887x_PS0BAR + (0x4 * (i + 1)),
+                                                                &ioport);
+                ioport &= 0x0000FF00;   /* the actual base address */
+                pci_write_config_dword(dev, ITE_887x_POSIO0 + (0x4 * (i + 1)),
+                        ITE_887x_POSIO_ENABLE | ITE_887x_POSIO_SPEED |
+                        ITE_887x_POSIO_IOSIZE_8 | ioport);
+
+                /* write the ioport to the UARTBAR */
+                pci_read_config_dword(dev, ITE_887x_UARTBAR, &uartbar);
+                uartbar &= ~(0xffff << (16 * i));       /* clear half the reg */
+                uartbar |= (ioport << (16 * i));        /* set the ioport */
+                pci_write_config_dword(dev, ITE_887x_UARTBAR, uartbar);
+
+                /* get current config */
+                pci_read_config_dword(dev, ITE_887x_MISCR, &miscr);
+                /* disable interrupts (UARTx_Routing[3:0]) */
+                miscr &= ~(0xf << (12 - 4 * i));
+                /* activate the UART (UARTx_En) */
+                miscr |= 1 << (23 - i);
+                /* write new config with activated UART */
+                pci_write_config_dword(dev, ITE_887x_MISCR, miscr);
+        }
+
+        if (ret <= 0) {
+                /* the device has no UARTs if we get here */
+                release_region(iobase->start, ITE_887x_IOSIZE);
+        }
+
+        return ret;
+}
+
+static void __devexit pci_ite887x_exit(struct pci_dev *dev)
+{
+        u32 ioport;
+        /* the ioport is bit 0-15 in POSIO0R */
+        pci_read_config_dword(dev, ITE_887x_POSIO0, &ioport);
+        ioport &= 0xffff;
+        release_region(ioport, ITE_887x_IOSIZE);
+}
+
 static int
 pci_default_setup(struct serial_private *priv, struct pciserial_board *board,
                   struct uart_port *port, int idx)
@@ -653,6 +785,18 @@ static struct pci_serial_quirk pci_serial_quirks[] = {
                 .setup          = pci_default_setup,
         },
         /*
+         * ITE
+         */
+        {
+                .vendor         = PCI_VENDOR_ID_ITE,
+                .device         = PCI_DEVICE_ID_ITE_8872,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .init           = pci_ite887x_init,
+                .setup          = pci_default_setup,
+                .exit           = __devexit_p(pci_ite887x_exit),
+        },
+        /*
          * Panacom
          */
         {
@@ -933,6 +1077,7 @@ enum pci_board_num_t {
 
         pbn_b1_2_1250000,
 
+        pbn_b1_bt_1_115200,
         pbn_b1_bt_2_921600,
 
         pbn_b1_1_1382400,
@@ -983,6 +1128,7 @@ enum pci_board_num_t {
         pbn_exar_XR17C152,
         pbn_exar_XR17C154,
         pbn_exar_XR17C158,
+        pbn_pasemi_1682M,
 };
 
 /*
@@ -1211,6 +1357,13 @@ static struct pciserial_board pci_boards[] __devinitdata = {
                 .uart_offset    = 8,
         },
 
+        [pbn_b1_bt_1_115200] = {
+                .flags          = FL_BASE1|FL_BASE_BARS,
+                .num_ports      = 1,
+                .base_baud      = 115200,
+                .uart_offset    = 8,
+        },
+
         [pbn_b1_bt_2_921600] = {
                 .flags          = FL_BASE1|FL_BASE_BARS,
                 .num_ports      = 2,
@@ -1498,6 +1651,18 @@ static struct pciserial_board pci_boards[] __devinitdata = {
                 .base_baud      = 921600,
                 .uart_offset    = 0x200,
         },
+        /*
+         * PA Semi PWRficient PA6T-1682M on-chip UART
+         */
+        [pbn_pasemi_1682M] = {
+                .flags          = FL_BASE0,
+                .num_ports      = 1,
+                .base_baud      = 8333333,
+        },
+};
+
+static const struct pci_device_id softmodem_blacklist[] = {
+        { PCI_VDEVICE ( AL, 0x5457 ), }, /* ALi Corporation M5457 AC'97 Modem */
 };
 
 /*
@@ -1508,6 +1673,7 @@ static struct pciserial_board pci_boards[] __devinitdata = {
 static int __devinit
 serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board)
 {
+        const struct pci_device_id *blacklist;
         int num_iomem, num_port, first_port = -1, i;
         
         /*
@@ -1522,6 +1688,18 @@ serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board)
             (dev->class & 0xff) > 6)
                 return -ENODEV;
 
+        /*
+         * Do not access blacklisted devices that are known not to
+         * feature serial ports.
+         */
+        for (blacklist = softmodem_blacklist;
+             blacklist < softmodem_blacklist + ARRAY_SIZE(softmodem_blacklist);
+             blacklist++) {
+                if (dev->vendor == blacklist->vendor &&
+                    dev->device == blacklist->device)
+                        return -ENODEV;
+        }
+
         num_iomem = num_port = 0;
         for (i = 0; i < PCI_NUM_BAR_RESOURCES; i++) {
                 if (pci_resource_flags(dev, i) & IORESOURCE_IO) {
@@ -2364,6 +2542,13 @@ static struct pci_device_id serial_pci_tbl[] = {
         {       PCI_VENDOR_ID_TOPIC, PCI_DEVICE_ID_TOPIC_TP560,
                 PCI_ANY_ID, PCI_ANY_ID, 0, 0,
                 pbn_b0_1_115200 },
+        /*
+         * ITE
+         */
+        {       PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
+                PCI_ANY_ID, PCI_ANY_ID,
+                0, 0,
+                pbn_b1_bt_1_115200 },
 
         /*
          * IntaShield IS-200
@@ -2382,6 +2567,13 @@ static struct pci_device_id serial_pci_tbl[] = {
                 PCI_SUBVENDOR_ID_PERLE, PCI_SUBDEVICE_ID_PCI_RAS8,
                 0, 0, pbn_b2_8_921600 },
         /*
+         * PA Semi PA6T-1682M on-chip UART
+         */
+        {       PCI_VENDOR_ID_PASEMI, 0xa004,
+                PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+                pbn_pasemi_1682M },
+
+        /*
          * These entries match devices with class COMMUNICATION_SERIAL,
          * COMMUNICATION_MODEM or COMMUNICATION_MULTISERIAL
          */
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index 030a6063541d..a055f58f342f 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -1146,11 +1146,14 @@ static void uart_set_termios(struct tty_struct *tty, struct ktermios *old_termio
 
         /*
          * These are the bits that are used to setup various
-         * flags in the low level driver.
+         * flags in the low level driver. We can ignore the Bfoo
+         * bits in c_cflag; c_[io]speed will always be set
+         * appropriately by set_termios() in tty_ioctl.c
          */
 #define RELEVANT_IFLAG(iflag)   ((iflag) & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
-
         if ((cflag ^ old_termios->c_cflag) == 0 &&
+            tty->termios->c_ospeed == old_termios->c_ospeed &&
+            tty->termios->c_ispeed == old_termios->c_ispeed &&
             RELEVANT_IFLAG(tty->termios->c_iflag ^ old_termios->c_iflag) == 0)
                 return;
 
diff --git a/drivers/serial/serial_txx9.c b/drivers/serial/serial_txx9.c
index b8f91e018b21..0930e2a85514 100644
--- a/drivers/serial/serial_txx9.c
+++ b/drivers/serial/serial_txx9.c
@@ -37,7 +37,7 @@
 
 #include <asm/io.h>
 
-static char *serial_version = "1.09";
+static char *serial_version = "1.10";
 static char *serial_name = "TX39/49 Serial driver";
 
 #define PASS_LIMIT      256
@@ -436,8 +436,10 @@ static unsigned int serial_txx9_get_mctrl(struct uart_port *port)
         struct uart_txx9_port *up = (struct uart_txx9_port *)port;
         unsigned int ret;
 
-        ret =  ((sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS)
-                | ((sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS);
+        /* no modem control lines */
+        ret = TIOCM_CAR | TIOCM_DSR;
+        ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS;
+        ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS;
 
         return ret;
 }
@@ -557,6 +559,12 @@ serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios,
         unsigned long flags;
         unsigned int baud, quot;
 
+        /*
+         * We don't support modem control lines.
+         */
+        termios->c_cflag &= ~(HUPCL | CMSPAR);
+        termios->c_cflag |= CLOCAL;
+
         cval = sio_in(up, TXX9_SILCR);
         /* byte size and parity */
         cval &= ~TXX9_SILCR_UMODE_MASK;
diff --git a/drivers/serial/sunsu.c b/drivers/serial/sunsu.c
index 79b13685bdfa..e074943feff5 100644
--- a/drivers/serial/sunsu.c
+++ b/drivers/serial/sunsu.c
@@ -1198,10 +1198,11 @@ static int __init sunsu_kbd_ms_init(struct uart_sunsu_port *up)
         if (up->port.type == PORT_UNKNOWN)
                 return -ENODEV;
 
-        printk("%s: %s port at %lx, irq %u\n",
+        printk("%s: %s port at %llx, irq %u\n",
                to_of_device(up->port.dev)->node->full_name,
                (up->su_type == SU_PORT_KBD) ? "Keyboard" : "Mouse",
-               up->port.mapbase, up->port.irq);
+               (unsigned long long) up->port.mapbase,
+               up->port.irq);
 
 #ifdef CONFIG_SERIO
         serio = &up->serio;
diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c
index 1d262c0c613f..283bef0d24cb 100644
--- a/drivers/serial/sunzilog.c
+++ b/drivers/serial/sunzilog.c
@@ -1431,14 +1431,16 @@ static int __devinit zs_probe(struct of_device *op, const struct of_device_id *m
                         return err;
                 }
         } else {
-                printk(KERN_INFO "%s: Keyboard at MMIO 0x%lx (irq = %d) "
+                printk(KERN_INFO "%s: Keyboard at MMIO 0x%llx (irq = %d) "
                        "is a %s\n",
-                       op->dev.bus_id, up[0].port.mapbase, op->irqs[0],
-                       sunzilog_type (&up[0].port));
-                printk(KERN_INFO "%s: Mouse at MMIO 0x%lx (irq = %d) "
+                       op->dev.bus_id,
+                       (unsigned long long) up[0].port.mapbase,
+                       op->irqs[0], sunzilog_type(&up[0].port));
+                printk(KERN_INFO "%s: Mouse at MMIO 0x%llx (irq = %d) "
                        "is a %s\n",
-                       op->dev.bus_id, up[1].port.mapbase, op->irqs[0],
-                       sunzilog_type (&up[1].port));
+                       op->dev.bus_id,
+                       (unsigned long long) up[1].port.mapbase,
+                       op->irqs[0], sunzilog_type(&up[1].port));
         }
 
         dev_set_drvdata(&op->dev, &up[0]);