moxa: first pass at termios reporting

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 15 insertions, 8 deletions

diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index 2fc255a21486..64b7b2b18352 100644
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -207,7 +207,7 @@ static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
                          unsigned int set, unsigned int clear);
 static void moxa_poll(unsigned long);
-static void moxa_set_tty_param(struct tty_struct *);
+static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
 static int moxa_block_till_ready(struct tty_struct *, struct file *,
                             struct moxa_port *);
 static void moxa_setup_empty_event(struct tty_struct *);
@@ -500,7 +500,7 @@ static int moxa_open(struct tty_struct *tty, struct file *filp)
         ch->tty = tty;
         if (!(ch->asyncflags & ASYNC_INITIALIZED)) {
                 ch->statusflags = 0;
-                moxa_set_tty_param(tty);
+                moxa_set_tty_param(tty, tty->termios);
                 MoxaPortLineCtrl(ch->port, 1, 1);
                 MoxaPortEnable(ch->port);
                 ch->asyncflags |= ASYNC_INITIALIZED;
@@ -803,7 +803,7 @@ static void moxa_set_termios(struct tty_struct *tty,
 
         if (ch == NULL)
                 return;
-        moxa_set_tty_param(tty);
+        moxa_set_tty_param(tty, old_termios);
         if (!(old_termios->c_cflag & CLOCAL) &&
             (tty->termios->c_cflag & CLOCAL))
                 wake_up_interruptible(&ch->open_wait);
@@ -903,11 +903,11 @@ static void moxa_poll(unsigned long ignored)
 
 /******************************************************************************/
 
-static void moxa_set_tty_param(struct tty_struct *tty)
+static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
 {
         register struct ktermios *ts;
         struct moxa_port *ch;
-        int rts, cts, txflow, rxflow, xany;
+        int rts, cts, txflow, rxflow, xany, baud;
 
         ch = (struct moxa_port *) tty->driver_data;
         ts = tty->termios;
@@ -924,8 +924,15 @@ static void moxa_set_tty_param(struct tty_struct *tty)
                 rxflow = 1;
         if (ts->c_iflag & IXANY)
                 xany = 1;
+
+        /* Clear the features we don't support */
+        ts->c_cflag &= ~CMSPAR;
         MoxaPortFlowCtrl(ch->port, rts, cts, txflow, rxflow, xany);
-        MoxaPortSetTermio(ch->port, ts, tty_get_baud_rate(tty));
+        baud = MoxaPortSetTermio(ch->port, ts, tty_get_baud_rate(tty));
+        if (baud == -1)
+                baud = tty_termios_baud_rate(old_termios);
+        /* Not put the baud rate into the termios data */
+        tty_encode_baud_rate(tty, baud, baud);
 }
 
 static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
@@ -2065,7 +2072,7 @@ int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud)
                 if (baud >= 921600L)
                         return (-1);
         }
-        MoxaPortSetBaud(port, baud);
+        baud = MoxaPortSetBaud(port, baud);
 
         if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
                 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
@@ -2074,7 +2081,7 @@ int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud)
                 moxa_wait_finish(ofsAddr);
 
         }
-        return (0);
+        return (baud);
 }
 
 int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState)