USB: mct232: speed, new termios and compliance cleanups

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 17 insertions, 9 deletions

diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
index 0dc99f75bb09..88b2074867c5 100644
--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -182,10 +182,11 @@ struct mct_u232_private {
 /*
  * Later day 2.6.0-test kernels have new baud rates like B230400 which
  * we do not know how to support. We ignore them for the moment.
- * XXX Rate-limit the error message, it's user triggerable.
  */
-static int mct_u232_calculate_baud_rate(struct usb_serial *serial, speed_t value)
+static int mct_u232_calculate_baud_rate(struct usb_serial *serial, speed_t value, speed_t *result)
 {
+        *result = value;
+
         if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID
           || le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_BELKIN_F5U109_PID) {
                 switch (value) {
@@ -200,11 +201,13 @@ static int mct_u232_calculate_baud_rate(struct usb_serial *serial, speed_t value
                 case  57600: return 0x0b;
                 case 115200: return 0x0c;
                 default:
-                        err("MCT USB-RS232: unsupported baudrate request 0x%x,"
-                            " using default of B9600", value);
+                        *result = 9600;
                         return 0x08;
                 }
         } else {
+                /* FIXME: Can we use any divider - should we do
+                   divider = 115200/value;
+                   real baud = 115200/divider */
                 switch (value) {
                 case 300: break;
                 case 600: break;
@@ -217,9 +220,8 @@ static int mct_u232_calculate_baud_rate(struct usb_serial *serial, speed_t value
                 case 57600: break;
                 case 115200: break;
                 default:
-                        err("MCT USB-RS232: unsupported baudrate request 0x%x,"
-                            " using default of B9600", value);
                         value = 9600;
+                        *result = 9600;
                 }
                 return 115200/value;
         }
@@ -232,16 +234,19 @@ static int mct_u232_set_baud_rate(struct usb_serial *serial, struct usb_serial_p
         int rc;
         unsigned char zero_byte = 0;
         unsigned char cts_enable_byte = 0;
+        speed_t speed;
 
-        divisor = cpu_to_le32(mct_u232_calculate_baud_rate(serial, value));
+        divisor = cpu_to_le32(mct_u232_calculate_baud_rate(serial, value, &speed));
 
         rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
                              MCT_U232_SET_BAUD_RATE_REQUEST,
                              MCT_U232_SET_REQUEST_TYPE,
                              0, 0, &divisor, MCT_U232_SET_BAUD_RATE_SIZE,
                              WDR_TIMEOUT);
-        if (rc < 0)
+        if (rc < 0)     /*FIXME: What value speed results */
                 err("Set BAUD RATE %d failed (error = %d)", value, rc);
+        else
+                tty_encode_baud_rate(port->tty, speed, speed);
         dbg("set_baud_rate: value: 0x%x, divisor: 0x%x", value, divisor);
 
         /* Mimic the MCT-supplied Windows driver (version 1.21P.0104), which
@@ -608,7 +613,8 @@ static void mct_u232_set_termios (struct usb_serial_port *port,
 {
         struct usb_serial *serial = port->serial;
         struct mct_u232_private *priv = usb_get_serial_port_data(port);
-        unsigned int cflag = port->tty->termios->c_cflag;
+        struct ktermios *termios = port->tty->termios;
+        unsigned int cflag = termios->c_cflag;
         unsigned int old_cflag = old_termios->c_cflag;
         unsigned long flags;
         unsigned int control_state;
@@ -670,6 +676,8 @@ static void mct_u232_set_termios (struct usb_serial_port *port,
                 break;
         }
 
+        termios->c_cflag &= ~CMSPAR;
+
         /* set the number of stop bits */
         last_lcr |= (cflag & CSTOPB) ?
                 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;