USB: cp2101: convert to new termios

- Convert to new baud rate functions
- Add baud rate reporting

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

1 files changed, 11 insertions, 37 deletions

diff --git a/drivers/usb/serial/cp2101.c b/drivers/usb/serial/cp2101.c
index eb7df1835c11..3a83cb4c4bc2 100644
--- a/drivers/usb/serial/cp2101.c
+++ b/drivers/usb/serial/cp2101.c
@@ -361,7 +361,6 @@ static void cp2101_get_termios (struct usb_serial_port *port)
                 dbg("%s - no tty structures", __FUNCTION__);
                 return;
         }
-        cflag = port->tty->termios->c_cflag;
 
         cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2);
         /* Convert to baudrate */
@@ -369,40 +368,9 @@ static void cp2101_get_termios (struct usb_serial_port *port)
                 baud = BAUD_RATE_GEN_FREQ / baud;
 
         dbg("%s - baud rate = %d", __FUNCTION__, baud);
-        cflag &= ~CBAUD;
-        switch (baud) {
-                /*
-                 * The baud rates which are commented out below
-                 * appear to be supported by the device
-                 * but are non-standard
-                 */
-                case 600:       cflag |= B600;          break;
-                case 1200:      cflag |= B1200;         break;
-                case 1800:      cflag |= B1800;         break;
-                case 2400:      cflag |= B2400;         break;
-                case 4800:      cflag |= B4800;         break;
-                /*case 7200:    cflag |= B7200;         break;*/
-                case 9600:      cflag |= B9600;         break;
-                /*case 14400:   cflag |= B14400;        break;*/
-                case 19200:     cflag |= B19200;        break;
-                /*case 28800:   cflag |= B28800;        break;*/
-                case 38400:     cflag |= B38400;        break;
-                /*case 55854:   cflag |= B55054;        break;*/
-                case 57600:     cflag |= B57600;        break;
-                case 115200:    cflag |= B115200;       break;
-                /*case 127117:  cflag |= B127117;       break;*/
-                case 230400:    cflag |= B230400;       break;
-                case 460800:    cflag |= B460800;       break;
-                case 921600:    cflag |= B921600;       break;
-                /*case 3686400: cflag |= B3686400;      break;*/
-                default:
-                        dbg("%s - Baud rate is not supported, "
-                                        "using 9600 baud", __FUNCTION__);
-                        cflag |= B9600;
-                        cp2101_set_config_single(port, CP2101_BAUDRATE,
-                                        (BAUD_RATE_GEN_FREQ/9600));
-                        break;
-        }
+
+        tty_encode_baud_rate(port->tty, baud, baud);
+        cflag = port->tty->termios->c_cflag;
 
         cp2101_get_config(port, CP2101_BITS, &bits, 2);
         cflag &= ~CSIZE;
@@ -516,7 +484,7 @@ static void cp2101_get_termios (struct usb_serial_port *port)
 static void cp2101_set_termios (struct usb_serial_port *port,
                 struct ktermios *old_termios)
 {
-        unsigned int cflag, old_cflag=0;
+        unsigned int cflag, old_cflag;
         int baud=0, bits;
         unsigned int modem_ctl[4];
 
@@ -526,6 +494,8 @@ static void cp2101_set_termios (struct usb_serial_port *port,
                 dbg("%s - no tty structures", __FUNCTION__);
                 return;
         }
+        port->tty->termios->c_cflag &= ~CMSPAR;
+
         cflag = port->tty->termios->c_cflag;
         old_cflag = old_termios->c_cflag;
         baud = tty_get_baud_rate(port->tty);
@@ -563,11 +533,15 @@ static void cp2101_set_termios (struct usb_serial_port *port,
                         dbg("%s - Setting baud rate to %d baud", __FUNCTION__,
                                         baud);
                         if (cp2101_set_config_single(port, CP2101_BAUDRATE,
-                                                (BAUD_RATE_GEN_FREQ / baud)))
+                                                (BAUD_RATE_GEN_FREQ / baud))) {
                                 dev_err(&port->dev, "Baud rate requested not "
                                                 "supported by device\n");
+                                baud = tty_termios_baud_rate(old_termios);
+                        }
                 }
         }
+        /* Report back the resulting baud rate */
+        tty_encode_baud_rate(port->tty, baud, baud);
 
         /* If the number of data bits is to be updated */
         if ((cflag & CSIZE) != (old_cflag & CSIZE)) {