Hi,
I noticed that DTR toggling doesn't work with the nozomi driver
(TIOCMBIS/TIOCMBIC ioctls have no effect). This is a nuisance because
that makes it hard to get the modem back in command mode.
Attached patch adds a tty_ops->tiocmset function that makes it work.
Should we also rip out the TIOCMBIS/TIOCMBIC handling in ntty_ioctl()?
It doesn't seem to be used anyway.
Patch is against 2.6.23-rc3-mm1, but not tested with that. I tested it
with 2.6.18.4 and the pharscape.org driver.
Eric
--- linux-2.6.23-rc3-mm1/drivers/char/nozomi.c.orig 2007-08-24 05:39:06.000000000 -0400
+++ linux-2.6.23-rc3-mm1/drivers/char/nozomi.c 2007-08-24 05:41:07.000000000 -0400
@@ -1930,12 +1930,16 @@
}
/* Sets io controls parameters */
-static int ntty_tiocmset(struct tty_struct *tty, struct file *file, u32 arg)
+static int ntty_tiocmset(struct tty_struct *tty, struct file *file,
+ unsigned int set, unsigned int clear)
{
struct port *port = (struct port *)tty->driver_data;
- set_rts(port->tty_index, (arg & TIOCM_RTS) ? 1 : 0);
- set_dtr(port->tty_index, (arg & TIOCM_DTR) ? 1 : 0);
+ if(set & TIOCM_RTS) set_rts(port->tty_index, 1);
+ else if(clear & TIOCM_RTS) set_rts(port->tty_index, 0);
+
+ if(set & TIOCM_DTR) set_dtr(port->tty_index, 1);
+ else if(clear & TIOCM_DTR) set_dtr(port->tty_index, 0);
return 0;
}
@@ -2039,7 +2043,7 @@
spin_unlock_irqrestore(&dc->spin_mutex, flags);
break;
case TIOCMSET:
- rval = ntty_tiocmset(tty, file, arg);
+ rval = ntty_tiocmset(tty, file, arg, ~arg);
break;
case TIOCMBIC:
if (get_user(mask, (unsigned long __user *)arg))
@@ -2152,6 +2156,7 @@
.set_termios = ntty_set_termios,
.chars_in_buffer = ntty_chars_in_buffer,
.put_char = ntty_put_char,
+ .tiocmset = ntty_tiocmset,
};
/* Initializes the tty */
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