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serial_txx9: Fix modem control line handling 

This chip does not have modem control lines.  Return TIOCM_CAR and
TIOCM_DSR always on get_mctrl() and ajust some bits in termios cflag.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Atsushi Nemoto 2007-08-22 14:01:15 -07:00 committed by Linus Torvalds
parent 84f8c6fc0e
commit 999999616e
1 changed files with 11 additions and 3 deletions
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14
drivers/serial/serial_txx9.c
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@ -37,7 +37,7 @@
#include <asm/io.h>
static char *serial_version = "1.09";
static char *serial_version = "1.10";
static char *serial_name = "TX39/49 Serial driver";
#define PASS_LIMIT 256
@ -436,8 +436,10 @@ static unsigned int serial_txx9_get_mctrl(struct uart_port *port)
struct uart_txx9_port *up = (struct uart_txx9_port *)port;
unsigned int ret;
ret = ((sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS)
| ((sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS);
/* no modem control lines */
ret = TIOCM_CAR | TIOCM_DSR;
ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS;
ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS;
return ret;
}
@ -557,6 +559,12 @@ serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios,
unsigned long flags;
unsigned int baud, quot;
/*
* We don't support modem control lines.
*/
termios->c_cflag &= ~(HUPCL | CMSPAR);
termios->c_cflag |= CLOCAL;
cval = sio_in(up, TXX9_SILCR);
/* byte size and parity */
cval &= ~TXX9_SILCR_UMODE_MASK;