1 files changed, 228 insertions, 100 deletions

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index d9fcdaedf389..3dc3768ca71c 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -47,7 +47,7 @@
 /*
  * Version Information
  */
-#define DRIVER_VERSION "v1.4.3"
+#define DRIVER_VERSION "v1.5.0"
 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Bill Ryder <bryder@sgi.com>, Kuba Ober <kuba@mareimbrium.org>"
 #define DRIVER_DESC "USB FTDI Serial Converters Driver"
 
@@ -82,17 +82,20 @@ struct ftdi_private {
         int rx_processed;
         unsigned long rx_bytes;
 
-        __u16 interface;        /* FT2232C port interface (0 for FT232/245) */
+        __u16 interface;        /* FT2232C, FT2232H or FT4232H port interface
+                                   (0 for FT232/245) */
 
         speed_t force_baud;     /* if non-zero, force the baud rate to
                                    this value */
         int force_rtscts;       /* if non-zero, force RTS-CTS to always
                                    be enabled */
 
+        unsigned int latency;           /* latency setting in use */
         spinlock_t tx_lock;     /* spinlock for transmit state */
         unsigned long tx_bytes;
         unsigned long tx_outstanding_bytes;
         unsigned long tx_outstanding_urbs;
+        unsigned short max_packet_size;
 };
 
 /* struct ftdi_sio_quirk is used by devices requiring special attention. */
@@ -163,6 +166,7 @@ static struct usb_device_id id_table_combined [] = {
         { USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_232RL_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) },
+        { USB_DEVICE(FTDI_VID, FTDI_4232H_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_MICRO_CHAMELEON_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) },
         { USB_DEVICE(FTDI_VID, FTDI_OPENDCC_PID) },
@@ -672,6 +676,7 @@ static struct usb_device_id id_table_combined [] = {
         { USB_DEVICE(JETI_VID, JETI_SPC1201_PID) },
         { USB_DEVICE(MARVELL_VID, MARVELL_SHEEVAPLUG_PID),
                 .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
+        { USB_DEVICE(LARSENBRUSGAARD_VID, LB_ALTITRACK_PID) },
         { },                                    /* Optional parameter entry */
         { }                                     /* Terminating entry */
 };
@@ -692,12 +697,13 @@ static const char *ftdi_chip_name[] = {
         [FT232BM] = "FT232BM",
         [FT2232C] = "FT2232C",
         [FT232RL] = "FT232RL",
+        [FT2232H] = "FT2232H",
+        [FT4232H] = "FT4232H"
 };
 
 
 /* Constants for read urb and write urb */
 #define BUFSZ 512
-#define PKTSZ 64
 
 /* rx_flags */
 #define THROTTLED               0x01
@@ -714,13 +720,12 @@ static const char *ftdi_chip_name[] = {
 /* function prototypes for a FTDI serial converter */
 static int  ftdi_sio_probe(struct usb_serial *serial,
                                         const struct usb_device_id *id);
-static void ftdi_shutdown(struct usb_serial *serial);
 static int  ftdi_sio_port_probe(struct usb_serial_port *port);
 static int  ftdi_sio_port_remove(struct usb_serial_port *port);
 static int  ftdi_open(struct tty_struct *tty,
                         struct usb_serial_port *port, struct file *filp);
-static void ftdi_close(struct tty_struct *tty,
-                        struct usb_serial_port *port, struct file *filp);
+static void ftdi_close(struct usb_serial_port *port);
+static void ftdi_dtr_rts(struct usb_serial_port *port, int on);
 static int  ftdi_write(struct tty_struct *tty, struct usb_serial_port *port,
                         const unsigned char *buf, int count);
 static int  ftdi_write_room(struct tty_struct *tty);
@@ -743,6 +748,8 @@ static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base);
 static unsigned short int ftdi_232am_baud_to_divisor(int baud);
 static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base);
 static __u32 ftdi_232bm_baud_to_divisor(int baud);
+static __u32 ftdi_2232h_baud_base_to_divisor(int baud, int base);
+static __u32 ftdi_2232h_baud_to_divisor(int baud);
 
 static struct usb_serial_driver ftdi_sio_device = {
         .driver = {
@@ -758,6 +765,7 @@ static struct usb_serial_driver ftdi_sio_device = {
         .port_remove =          ftdi_sio_port_remove,
         .open =                 ftdi_open,
         .close =                ftdi_close,
+        .dtr_rts =              ftdi_dtr_rts,
         .throttle =             ftdi_throttle,
         .unthrottle =           ftdi_unthrottle,
         .write =                ftdi_write,
@@ -770,7 +778,6 @@ static struct usb_serial_driver ftdi_sio_device = {
         .ioctl =                ftdi_ioctl,
         .set_termios =          ftdi_set_termios,
         .break_ctl =            ftdi_break_ctl,
-        .shutdown =             ftdi_shutdown,
 };
 
 
@@ -836,6 +843,36 @@ static __u32 ftdi_232bm_baud_to_divisor(int baud)
          return ftdi_232bm_baud_base_to_divisor(baud, 48000000);
 }
 
+static __u32 ftdi_2232h_baud_base_to_divisor(int baud, int base)
+{
+        static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
+        __u32 divisor;
+        int divisor3;
+
+        /* hi-speed baud rate is 10-bit sampling instead of 16-bit */
+        divisor3 = (base / 10 / baud) * 8;
+
+        divisor = divisor3 >> 3;
+        divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
+        /* Deal with special cases for highest baud rates. */
+        if (divisor == 1)
+                divisor = 0;
+        else if (divisor == 0x4001)
+                divisor = 1;
+        /*
+         * Set this bit to turn off a divide by 2.5 on baud rate generator
+         * This enables baud rates up to 12Mbaud but cannot reach below 1200
+         * baud with this bit set
+         */
+        divisor |= 0x00020000;
+        return divisor;
+}
+
+static __u32 ftdi_2232h_baud_to_divisor(int baud)
+{
+         return ftdi_2232h_baud_base_to_divisor(baud, 120000000);
+}
+
 #define set_mctrl(port, set)            update_mctrl((port), (set), 0)
 #define clear_mctrl(port, clear)        update_mctrl((port), 0, (clear))
 
@@ -994,6 +1031,19 @@ static __u32 get_ftdi_divisor(struct tty_struct *tty,
                         baud = 9600;
                 }
                 break;
+        case FT2232H: /* FT2232H chip */
+        case FT4232H: /* FT4232H chip */
+                if ((baud <= 12000000) & (baud >= 1200)) {
+                        div_value = ftdi_2232h_baud_to_divisor(baud);
+                } else if (baud < 1200) {
+                        div_value = ftdi_232bm_baud_to_divisor(baud);
+                } else {
+                        dbg("%s - Baud rate too high!", __func__);
+                        div_value = ftdi_232bm_baud_to_divisor(9600);
+                        div_okay = 0;
+                        baud = 9600;
+                }
+                break;
         } /* priv->chip_type */
 
         if (div_okay) {
@@ -1037,7 +1087,54 @@ static int change_speed(struct tty_struct *tty, struct usb_serial_port *port)
         return rv;
 }
 
+static int write_latency_timer(struct usb_serial_port *port)
+{
+        struct ftdi_private *priv = usb_get_serial_port_data(port);
+        struct usb_device *udev = port->serial->dev;
+        char buf[1];
+        int rv = 0;
+        int l = priv->latency;
+
+        if (priv->flags & ASYNC_LOW_LATENCY)
+                l = 1;
+
+        dbg("%s: setting latency timer = %i", __func__, l);
+
+        rv = usb_control_msg(udev,
+                             usb_sndctrlpipe(udev, 0),
+                             FTDI_SIO_SET_LATENCY_TIMER_REQUEST,
+                             FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE,
+                             l, priv->interface,
+                             buf, 0, WDR_TIMEOUT);
+
+        if (rv < 0)
+                dev_err(&port->dev, "Unable to write latency timer: %i\n", rv);
+        return rv;
+}
+
+static int read_latency_timer(struct usb_serial_port *port)
+{
+        struct ftdi_private *priv = usb_get_serial_port_data(port);
+        struct usb_device *udev = port->serial->dev;
+        unsigned short latency = 0;
+        int rv = 0;
+
 
+        dbg("%s", __func__);
+
+        rv = usb_control_msg(udev,
+                             usb_rcvctrlpipe(udev, 0),
+                             FTDI_SIO_GET_LATENCY_TIMER_REQUEST,
+                             FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,
+                             0, priv->interface,
+                             (char *) &latency, 1, WDR_TIMEOUT);
+
+        if (rv < 0) {
+                dev_err(&port->dev, "Unable to read latency timer: %i\n", rv);
+                return -EIO;
+        }
+        return latency;
+}
 
 static int get_serial_info(struct usb_serial_port *port,
                                 struct serial_struct __user *retinfo)
@@ -1097,6 +1194,7 @@ static int set_serial_info(struct tty_struct *tty,
         priv->custom_divisor = new_serial.custom_divisor;
 
         tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+        write_latency_timer(port);
 
 check_and_exit:
         if ((old_priv.flags & ASYNC_SPD_MASK) !=
@@ -1146,14 +1244,29 @@ static void ftdi_determine_type(struct usb_serial_port *port)
         if (interfaces > 1) {
                 int inter;
 
-                /* Multiple interfaces.  Assume FT2232C. */
-                priv->chip_type = FT2232C;
+                /* Multiple interfaces.*/
+                if (version == 0x0800) {
+                        priv->chip_type = FT4232H;
+                        /* Hi-speed - baud clock runs at 120MHz */
+                        priv->baud_base = 120000000 / 2;
+                } else if (version == 0x0700) {
+                        priv->chip_type = FT2232H;
+                        /* Hi-speed - baud clock runs at 120MHz */
+                        priv->baud_base = 120000000 / 2;
+                } else
+                        priv->chip_type = FT2232C;
+
                 /* Determine interface code. */
                 inter = serial->interface->altsetting->desc.bInterfaceNumber;
-                if (inter == 0)
-                        priv->interface = PIT_SIOA;
-                else
-                        priv->interface = PIT_SIOB;
+                if (inter == 0) {
+                        priv->interface = INTERFACE_A;
+                } else  if (inter == 1) {
+                        priv->interface = INTERFACE_B;
+                } else  if (inter == 2) {
+                        priv->interface = INTERFACE_C;
+                } else  if (inter == 3) {
+                        priv->interface = INTERFACE_D;
+                }
                 /* BM-type devices have a bug where bcdDevice gets set
                  * to 0x200 when iSerialNumber is 0.  */
                 if (version < 0x500) {
@@ -1181,6 +1294,45 @@ static void ftdi_determine_type(struct usb_serial_port *port)
 }
 
 
+/* Determine the maximum packet size for the device.  This depends on the chip
+ * type and the USB host capabilities.  The value should be obtained from the
+ * device descriptor as the chip will use the appropriate values for the host.*/
+static void ftdi_set_max_packet_size(struct usb_serial_port *port)
+{
+        struct ftdi_private *priv = usb_get_serial_port_data(port);
+        struct usb_serial *serial = port->serial;
+        struct usb_device *udev = serial->dev;
+
+        struct usb_interface *interface = serial->interface;
+        struct usb_endpoint_descriptor *ep_desc = &interface->cur_altsetting->endpoint[1].desc;
+
+        unsigned num_endpoints;
+        int i = 0;
+
+        num_endpoints = interface->cur_altsetting->desc.bNumEndpoints;
+        dev_info(&udev->dev, "Number of endpoints %d\n", num_endpoints);
+
+        /* NOTE: some customers have programmed FT232R/FT245R devices
+         * with an endpoint size of 0 - not good.  In this case, we
+         * want to override the endpoint descriptor setting and use a
+         * value of 64 for wMaxPacketSize */
+        for (i = 0; i < num_endpoints; i++) {
+                dev_info(&udev->dev, "Endpoint %d MaxPacketSize %d\n", i+1,
+                        interface->cur_altsetting->endpoint[i].desc.wMaxPacketSize);
+                ep_desc = &interface->cur_altsetting->endpoint[i].desc;
+                if (ep_desc->wMaxPacketSize == 0) {
+                        ep_desc->wMaxPacketSize = cpu_to_le16(0x40);
+                        dev_info(&udev->dev, "Overriding wMaxPacketSize on endpoint %d\n", i);
+                }
+        }
+
+        /* set max packet size based on descriptor */
+        priv->max_packet_size = ep_desc->wMaxPacketSize;
+
+        dev_info(&udev->dev, "Setting MaxPacketSize %d\n", priv->max_packet_size);
+}
+
+
 /*
  * ***************************************************************************
  * Sysfs Attribute
@@ -1192,27 +1344,13 @@ static ssize_t show_latency_timer(struct device *dev,
 {
         struct usb_serial_port *port = to_usb_serial_port(dev);
         struct ftdi_private *priv = usb_get_serial_port_data(port);
-        struct usb_device *udev = port->serial->dev;
-        unsigned short latency = 0;
-        int rv = 0;
-
-
-        dbg("%s", __func__);
-
-        rv = usb_control_msg(udev,
-                             usb_rcvctrlpipe(udev, 0),
-                             FTDI_SIO_GET_LATENCY_TIMER_REQUEST,
-                             FTDI_SIO_GET_LATENCY_TIMER_REQUEST_TYPE,
-                             0, priv->interface,
-                             (char *) &latency, 1, WDR_TIMEOUT);
-
-        if (rv < 0) {
-                dev_err(dev, "Unable to read latency timer: %i\n", rv);
-                return -EIO;
-        }
-        return sprintf(buf, "%i\n", latency);
+        if (priv->flags & ASYNC_LOW_LATENCY)
+                return sprintf(buf, "1\n");
+        else
+                return sprintf(buf, "%i\n", priv->latency);
 }
 
+
 /* Write a new value of the latency timer, in units of milliseconds. */
 static ssize_t store_latency_timer(struct device *dev,
                         struct device_attribute *attr, const char *valbuf,
@@ -1220,25 +1358,13 @@ static ssize_t store_latency_timer(struct device *dev,
 {
         struct usb_serial_port *port = to_usb_serial_port(dev);
         struct ftdi_private *priv = usb_get_serial_port_data(port);
-        struct usb_device *udev = port->serial->dev;
-        char buf[1];
         int v = simple_strtoul(valbuf, NULL, 10);
         int rv = 0;
 
-        dbg("%s: setting latency timer = %i", __func__, v);
-
-        rv = usb_control_msg(udev,
-                             usb_sndctrlpipe(udev, 0),
-                             FTDI_SIO_SET_LATENCY_TIMER_REQUEST,
-                             FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE,
-                             v, priv->interface,
-                             buf, 0, WDR_TIMEOUT);
-
-        if (rv < 0) {
-                dev_err(dev, "Unable to write latency timer: %i\n", rv);
+        priv->latency = v;
+        rv = write_latency_timer(port);
+        if (rv < 0)
                 return -EIO;
-        }
-
         return count;
 }
 
@@ -1290,7 +1416,9 @@ static int create_sysfs_attrs(struct usb_serial_port *port)
                 if ((!retval) &&
                     (priv->chip_type == FT232BM ||
                      priv->chip_type == FT2232C ||
-                     priv->chip_type == FT232RL)) {
+                     priv->chip_type == FT232RL ||
+                     priv->chip_type == FT2232H ||
+                     priv->chip_type == FT4232H)) {
                         retval = device_create_file(&port->dev,
                                                     &dev_attr_latency_timer);
                 }
@@ -1309,7 +1437,9 @@ static void remove_sysfs_attrs(struct usb_serial_port *port)
                 device_remove_file(&port->dev, &dev_attr_event_char);
                 if (priv->chip_type == FT232BM ||
                     priv->chip_type == FT2232C ||
-                    priv->chip_type == FT232RL) {
+                    priv->chip_type == FT232RL ||
+                    priv->chip_type == FT2232H ||
+                    priv->chip_type == FT4232H) {
                         device_remove_file(&port->dev, &dev_attr_latency_timer);
                 }
         }
@@ -1392,6 +1522,8 @@ static int ftdi_sio_port_probe(struct usb_serial_port *port)
         usb_set_serial_port_data(port, priv);
 
         ftdi_determine_type(port);
+        ftdi_set_max_packet_size(port);
+        read_latency_timer(port);
         create_sysfs_attrs(port);
         return 0;
 }
@@ -1460,18 +1592,6 @@ static int ftdi_mtxorb_hack_setup(struct usb_serial *serial)
         return 0;
 }
 
-/* ftdi_shutdown is called from usbserial:usb_serial_disconnect
- *   it is called when the usb device is disconnected
- *
- *   usbserial:usb_serial_disconnect
- *      calls __serial_close for each open of the port
- *      shutdown is called then (ie ftdi_shutdown)
- */
-static void ftdi_shutdown(struct usb_serial *serial)
-{
-        dbg("%s", __func__);
-}
-
 static void ftdi_sio_priv_release(struct kref *k)
 {
         struct ftdi_private *priv = container_of(k, struct ftdi_private, kref);
@@ -1514,6 +1634,8 @@ static int ftdi_open(struct tty_struct *tty,
         if (tty)
                 tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
 
+        write_latency_timer(port);
+
         /* No error checking for this (will get errors later anyway) */
         /* See ftdi_sio.h for description of what is reset */
         usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
@@ -1529,11 +1651,6 @@ static int ftdi_open(struct tty_struct *tty,
         if (tty)
                 ftdi_set_termios(tty, port, tty->termios);
 
-        /* FIXME: Flow control might be enabled, so it should be checked -
-           we have no control of defaults! */
-        /* Turn on RTS and DTR since we are not flow controlling by default */
-        set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
-
         /* Not throttled */
         spin_lock_irqsave(&priv->rx_lock, flags);
         priv->rx_flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
@@ -1558,6 +1675,30 @@ static int ftdi_open(struct tty_struct *tty,
 } /* ftdi_open */
 
 
+static void ftdi_dtr_rts(struct usb_serial_port *port, int on)
+{
+        struct ftdi_private *priv = usb_get_serial_port_data(port);
+        char buf[1];
+
+        mutex_lock(&port->serial->disc_mutex);
+        if (!port->serial->disconnected) {
+                /* Disable flow control */
+                if (!on && usb_control_msg(port->serial->dev,
+                            usb_sndctrlpipe(port->serial->dev, 0),
+                            FTDI_SIO_SET_FLOW_CTRL_REQUEST,
+                            FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
+                            0, priv->interface, buf, 0,
+                            WDR_TIMEOUT) < 0) {
+                            dev_err(&port->dev, "error from flowcontrol urb\n");
+                }
+                /* drop RTS and DTR */
+                if (on)
+                        set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
+                else
+                        clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
+        }
+        mutex_unlock(&port->serial->disc_mutex);
+}
 
 /*
  * usbserial:__serial_close  only calls ftdi_close if the point is open
@@ -1567,31 +1708,12 @@ static int ftdi_open(struct tty_struct *tty,
  *
  */
 
-static void ftdi_close(struct tty_struct *tty,
-                        struct usb_serial_port *port, struct file *filp)
+static void ftdi_close(struct usb_serial_port *port)
 { /* ftdi_close */
-        unsigned int c_cflag = tty->termios->c_cflag;
         struct ftdi_private *priv = usb_get_serial_port_data(port);
-        char buf[1];
 
         dbg("%s", __func__);
 
-        mutex_lock(&port->serial->disc_mutex);
-        if (c_cflag & HUPCL && !port->serial->disconnected) {
-                /* Disable flow control */
-                if (usb_control_msg(port->serial->dev,
-                                    usb_sndctrlpipe(port->serial->dev, 0),
-                                    FTDI_SIO_SET_FLOW_CTRL_REQUEST,
-                                    FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
-                                    0, priv->interface, buf, 0,
-                                    WDR_TIMEOUT) < 0) {
-                        dev_err(&port->dev, "error from flowcontrol urb\n");
-                }
-
-                /* drop RTS and DTR */
-                clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
-        } /* Note change no line if hupcl is off */
-        mutex_unlock(&port->serial->disc_mutex);
 
         /* cancel any scheduled reading */
         cancel_delayed_work_sync(&priv->rx_work);
@@ -1644,8 +1766,8 @@ static int ftdi_write(struct tty_struct *tty, struct usb_serial_port *port,
         if (data_offset > 0) {
                 /* Original sio needs control bytes too... */
                 transfer_size += (data_offset *
-                                ((count + (PKTSZ - 1 - data_offset)) /
-                                 (PKTSZ - data_offset)));
+                                ((count + (priv->max_packet_size - 1 - data_offset)) /
+                                 (priv->max_packet_size - data_offset)));
         }
 
         buffer = kmalloc(transfer_size, GFP_ATOMIC);
@@ -1667,7 +1789,7 @@ static int ftdi_write(struct tty_struct *tty, struct usb_serial_port *port,
         if (data_offset > 0) {
                 /* Original sio requires control byte at start of
                    each packet. */
-                int user_pktsz = PKTSZ - data_offset;
+                int user_pktsz = priv->max_packet_size - data_offset;
                 int todo = count;
                 unsigned char *first_byte = buffer;
                 const unsigned char *current_position = buf;
@@ -1748,11 +1870,6 @@ static void ftdi_write_bulk_callback(struct urb *urb)
 
         dbg("%s - port %d", __func__, port->number);
 
-        if (status) {
-                dbg("nonzero write bulk status received: %d", status);
-                return;
-        }
-
         priv = usb_get_serial_port_data(port);
         if (!priv) {
                 dbg("%s - bad port private data pointer - exiting", __func__);
@@ -1763,13 +1880,18 @@ static void ftdi_write_bulk_callback(struct urb *urb)
         data_offset = priv->write_offset;
         if (data_offset > 0) {
                 /* Subtract the control bytes */
-                countback -= (data_offset * DIV_ROUND_UP(countback, PKTSZ));
+                countback -= (data_offset * DIV_ROUND_UP(countback, priv->max_packet_size));
         }
         spin_lock_irqsave(&priv->tx_lock, flags);
         --priv->tx_outstanding_urbs;
         priv->tx_outstanding_bytes -= countback;
         spin_unlock_irqrestore(&priv->tx_lock, flags);
 
+        if (status) {
+                dbg("nonzero write bulk status received: %d", status);
+                return;
+        }
+
         usb_serial_port_softint(port);
 } /* ftdi_write_bulk_callback */
 
@@ -1865,7 +1987,7 @@ static void ftdi_read_bulk_callback(struct urb *urb)
 
         /* count data bytes, but not status bytes */
         countread = urb->actual_length;
-        countread -= 2 * DIV_ROUND_UP(countread, PKTSZ);
+        countread -= 2 * DIV_ROUND_UP(countread, priv->max_packet_size);
         spin_lock_irqsave(&priv->rx_lock, flags);
         priv->rx_bytes += countread;
         spin_unlock_irqrestore(&priv->rx_lock, flags);
@@ -1938,7 +2060,7 @@ static void ftdi_process_read(struct work_struct *work)
 
         need_flip = 0;
         for (packet_offset = priv->rx_processed;
-                packet_offset < urb->actual_length; packet_offset += PKTSZ) {
+                packet_offset < urb->actual_length; packet_offset += priv->max_packet_size) {
                 int length;
 
                 /* Compare new line status to the old one, signal if different/
@@ -1953,7 +2075,7 @@ static void ftdi_process_read(struct work_struct *work)
                         priv->prev_status = new_status;
                 }
 
-                length = min_t(u32, PKTSZ, urb->actual_length-packet_offset)-2;
+                length = min_t(u32, priv->max_packet_size, urb->actual_length-packet_offset)-2;
                 if (length < 0) {
                         dev_err(&port->dev, "%s - bad packet length: %d\n",
                                 __func__, length+2);
@@ -1984,6 +2106,7 @@ static void ftdi_process_read(struct work_struct *work)
                 if (data[packet_offset+1] & FTDI_RS_BI) {
                         error_flag = TTY_BREAK;
                         dbg("BREAK received");
+                        usb_serial_handle_break(port);
                 }
                 if (data[packet_offset+1] & FTDI_RS_PE) {
                         error_flag = TTY_PARITY;
@@ -1998,8 +2121,11 @@ static void ftdi_process_read(struct work_struct *work)
                                 /* Note that the error flag is duplicated for
                                    every character received since we don't know
                                    which character it applied to */
-                                tty_insert_flip_char(tty,
-                                        data[packet_offset + i], error_flag);
+                                if (!usb_serial_handle_sysrq_char(port,
+                                                data[packet_offset + i]))
+                                        tty_insert_flip_char(tty,
+                                                data[packet_offset + i],
+                                                error_flag);
                         }
                         need_flip = 1;
                 }
@@ -2305,6 +2431,8 @@ static int ftdi_tiocmget(struct tty_struct *tty, struct file *file)
         case FT232BM:
         case FT2232C:
         case FT232RL:
+        case FT2232H:
+        case FT4232H:
                 /* the 8U232AM returns a two byte value (the sio is a 1 byte
                    value) - in the same format as the data returned from the in
                    point */