USB: iuu_phoenix: Add support for different baud rates.

Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 41 insertions, 13 deletions

diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
index 74551cb2e8ee..efc72113216b 100644
--- a/drivers/usb/serial/iuu_phoenix.c
+++ b/drivers/usb/serial/iuu_phoenix.c
@@ -1,6 +1,8 @@
 /*
  * Infinity Unlimited USB Phoenix driver
  *
+ * Copyright (C) 2010 James Courtier-Dutton (James@superbug.co.uk)
+
  * Copyright (C) 2007 Alain Degreffe (eczema@ecze.com)
  *
  * Original code taken from iuutool (Copyright (C) 2006 Juan Carlos Borrás)
@@ -40,7 +42,7 @@ static int debug;
 /*
  * Version Information
  */
-#define DRIVER_VERSION "v0.11"
+#define DRIVER_VERSION "v0.12"
 #define DRIVER_DESC "Infinity USB Unlimited Phoenix driver"
 
 static const struct usb_device_id id_table[] = {
@@ -81,6 +83,9 @@ struct iuu_private {
         u8 *dbgbuf;             /* debug buffer */
         u8 len;
         int vcc;                /* vcc (either 3 or 5 V) */
+        u32 baud;
+        u32 boost;
+        u32 clk;
 };
 
 
@@ -157,13 +162,14 @@ static int iuu_tiocmset(struct tty_struct *tty, struct file *file,
             port->number, set, clear);
 
         spin_lock_irqsave(&priv->lock, flags);
-        if (set & TIOCM_RTS)
-                priv->tiostatus = TIOCM_RTS;
 
-        if (!(set & TIOCM_RTS) && priv->tiostatus == TIOCM_RTS) {
+        if ((set & TIOCM_RTS) && !(priv->tiostatus == TIOCM_RTS)) {
                 dbg("%s TIOCMSET RESET called !!!", __func__);
                 priv->reset = 1;
         }
+        if (set & TIOCM_RTS)
+                priv->tiostatus = TIOCM_RTS;
+
         spin_unlock_irqrestore(&priv->lock, flags);
         return 0;
 }
@@ -851,20 +857,24 @@ static int iuu_uart_off(struct usb_serial_port *port)
         return status;
 }
 
-static int iuu_uart_baud(struct usb_serial_port *port, u32 baud,
+static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
                          u32 *actual, u8 parity)
 {
         int status;
+        u32 baud;
         u8 *dataout;
         u8 DataCount = 0;
         u8 T1Frekvens = 0;
         u8 T1reload = 0;
         unsigned int T1FrekvensHZ = 0;
 
+        dbg("%s - enter baud_base=%d", __func__, baud_base);
         dataout = kmalloc(sizeof(u8) * 5, GFP_KERNEL);
 
         if (!dataout)
                 return -ENOMEM;
+        /*baud = (((priv->clk / 35) * baud_base) / 100000); */
+        baud = baud_base;
 
         if (baud < 1200 || baud > 230400) {
                 kfree(dataout);
@@ -948,15 +958,20 @@ static void iuu_set_termios(struct tty_struct *tty,
                 struct usb_serial_port *port, struct ktermios *old_termios)
 {
         const u32 supported_mask = CMSPAR|PARENB|PARODD;
-
+        struct iuu_private *priv = usb_get_serial_port_data(port);
         unsigned int cflag = tty->termios->c_cflag;
         int status;
         u32 actual;
         u32 parity;
         int csize = CS7;
-        int baud = 9600;        /* Fixed for the moment */
+        int baud;
         u32 newval = cflag & supported_mask;
 
+        /* Just use the ospeed. ispeed should be the same. */
+        baud = tty->termios->c_ospeed;
+
+        dbg("%s - enter c_ospeed or baud=%d", __func__, baud);
+
         /* compute the parity parameter */
         parity = 0;
         if (cflag & CMSPAR) {   /* Using mark space */
@@ -976,15 +991,15 @@ static void iuu_set_termios(struct tty_struct *tty,
 
         /* set it */
         status = iuu_uart_baud(port,
-                        (clockmode == 2) ? 16457 : 9600 * boost / 100,
+                        baud * priv->boost / 100,
                         &actual, parity);
 
         /* set the termios value to the real one, so the user now what has
          * changed. We support few fields so its easies to copy the old hw
          * settings back over and then adjust them
          */
-        if (old_termios)
-                tty_termios_copy_hw(tty->termios, old_termios);
+        if (old_termios)
+                tty_termios_copy_hw(tty->termios, old_termios);
         if (status != 0)        /* Set failed - return old bits */
                 return;
         /* Re-encode speed, parity and csize */
@@ -1018,6 +1033,7 @@ static void iuu_close(struct usb_serial_port *port)
 
 static void iuu_init_termios(struct tty_struct *tty)
 {
+        dbg("%s - enter", __func__);
         *(tty->termios) = tty_std_termios;
         tty->termios->c_cflag = CLOCAL | CREAD | CS8 | B9600
                                 | TIOCM_CTS | CSTOPB | PARENB;
@@ -1033,10 +1049,16 @@ static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
         struct usb_serial *serial = port->serial;
         u8 *buf;
         int result;
+        int baud;
         u32 actual;
         struct iuu_private *priv = usb_get_serial_port_data(port);
 
-        dbg("%s -  port %d", __func__, port->number);
+        baud = tty->termios->c_ospeed;
+        tty->termios->c_ispeed = baud;
+        /* Re-encode speed */
+        tty_encode_baud_rate(tty, baud, baud);
+
+        dbg("%s -  port %d, baud %d", __func__, port->number, baud);
         usb_clear_halt(serial->dev, port->write_urb->pipe);
         usb_clear_halt(serial->dev, port->read_urb->pipe);
 
@@ -1071,23 +1093,29 @@ static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
         iuu_uart_on(port);
         if (boost < 100)
                 boost = 100;
+        priv->boost = boost;
+        priv->baud = baud;
         switch (clockmode) {
         case 2:         /*  3.680 Mhz */
+                priv->clk = IUU_CLK_3680000;
                 iuu_clk(port, IUU_CLK_3680000 * boost / 100);
                 result =
-                    iuu_uart_baud(port, 9600 * boost / 100, &actual,
+                    iuu_uart_baud(port, baud * boost / 100, &actual,
                                   IUU_PARITY_EVEN);
                 break;
         case 3:         /*  6.00 Mhz */
                 iuu_clk(port, IUU_CLK_6000000 * boost / 100);
+                priv->clk = IUU_CLK_6000000;
+                /* Ratio of 6000000 to 3500000 for baud 9600 */
                 result =
                     iuu_uart_baud(port, 16457 * boost / 100, &actual,
                                   IUU_PARITY_EVEN);
                 break;
         default:                /*  3.579 Mhz */
                 iuu_clk(port, IUU_CLK_3579000 * boost / 100);
+                priv->clk = IUU_CLK_3579000;
                 result =
-                    iuu_uart_baud(port, 9600 * boost / 100, &actual,
+                    iuu_uart_baud(port, baud * boost / 100, &actual,
                                   IUU_PARITY_EVEN);
         }