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authorOlivier Bornet <Olivier.Bornet@puck.ch>2009-06-11 12:54:20 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-11 08:51:02 -0700
commit96dab77ebf3868cc8723ac95e048e8a9c1dccf22 (patch)
tree3094428021c695250c411ef2240cd030ad8f4e97 /drivers/usb
parentcc3447d179d8a5e16807e52b77d7f4c095ffedb7 (diff)
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>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/serial/iuu_phoenix.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
index ef6d12fd579c..fa86f6e7415f 100644
--- 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,
};