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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>
hifive-unleashed-5.1
Olivier Bornet 2009-06-11 12:54:20 +01:00 committed by Linus Torvalds
parent cc3447d179
commit 96dab77ebf
1 changed files with 50 additions and 0 deletions
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50
drivers/usb/serial/iuu_phoenix.c
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@ -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,
};