1 files changed, 80 insertions, 10 deletions

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 59c7501840cb..80ccfa13e0b3 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"
 
@@ -82,7 +82,8 @@ 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 */
@@ -164,6 +165,7 @@ 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) },
@@ -694,6 +696,8 @@ static const char *ftdi_chip_name[] = {
         [FT232BM] = "FT232BM",
         [FT2232C] = "FT2232C",
         [FT232RL] = "FT232RL",
+        [FT2232H] = "FT2232H",
+        [FT4232H] = "FT4232H"
 };
 
 
@@ -745,6 +749,8 @@ 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 = {
@@ -839,6 +845,36 @@ 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))
 
@@ -997,6 +1033,19 @@ 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) {
@@ -1197,14 +1246,29 @@ 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) {
@@ -1315,7 +1379,9 @@ 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);
                 }
@@ -1334,7 +1400,9 @@ 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);
                 }
         }
@@ -2333,6 +2401,8 @@ 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 */