tty: iuu_phoenix: set termios.

set_termios can now be used for setting the parity and the stopbits. This is
needed to use with cards which use a different parity then the parity used at
start (even).

If the iuu_uart_baud function return an error, we will return the old_termios
instead of the new one.

Signed-off-by: Olivier Bornet <Olivier.Bornet@puck.ch>
This was then revamped to use the various helpers, not copy non-hardware
bits any to add mark/space parity and csize reporting

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
index ef6d12f..fa86f6e 100644 (file)
--- a/drivers/usb/serial/iuu_phoenix.c
+++ b/drivers/usb/serial/iuu_phoenix.c
@@ -942,6 +942,55 @@ static int iuu_uart_baud(struct usb_serial_port *port, u32 baud,
        return status;
 }
 
+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;
+
+       unsigned int cflag = tty->termios->c_cflag;
+       int status;
+       u32 actual;
+       u32 parity;
+       int csize = CS7;
+       int baud = 9600;        /* Fixed for the moment */
+       u32 newval = cflag & supported_mask;
+
+       /* compute the parity parameter */
+       parity = 0;
+       if (cflag & CMSPAR) {   /* Using mark space */
+               if (cflag & PARODD)
+                       parity |= IUU_PARITY_SPACE;
+               else
+                       parity |= IUU_PARITY_MARK;
+       } else if (!(cflag & PARENB)) {
+               parity |= IUU_PARITY_NONE;
+               csize = CS8;
+       } else if (cflag & PARODD)
+               parity |= IUU_PARITY_ODD;
+       else
+               parity |= IUU_PARITY_EVEN;
+
+       parity |= (cflag & CSTOPB ? IUU_TWO_STOP_BITS : IUU_ONE_STOP_BIT);
+
+       /* set it */
+       status = iuu_uart_baud(port,
+                       (clockmode == 2) ? 16457 : 9600 * 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 (status != 0)        /* Set failed - return old bits */
+               return;
+       /* Re-encode speed, parity and csize */
+       tty_encode_baud_rate(tty, baud, baud);
+       tty->termios->c_cflag &= ~(supported_mask|CSIZE);
+       tty->termios->c_cflag |= newval | csize;
+}
+
 static void iuu_close(struct usb_serial_port *port)
 {
        /* iuu_led (port,255,0,0,0); */
@@ -1151,6 +1200,7 @@ static struct usb_serial_driver iuu_device = {
        .read_bulk_callback = iuu_uart_read_callback,
        .tiocmget = iuu_tiocmget,
        .tiocmset = iuu_tiocmset,
+       .set_termios = iuu_set_termios,
        .attach = iuu_startup,
        .shutdown = iuu_shutdown,
 };