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TTY: ircomm, define carrier routines

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These will be used by the tty_port wait_til_ready later. (Now they are
used by our code.)

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Samuel Ortiz <samuel@sortiz.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2012-06-04 13:35:23 +02:00 committed by Greg Kroah-Hartman
parent 38c58032f0
commit 0ba9ff846b
1 changed files with 33 additions and 10 deletions
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43
net/irda/ircomm/ircomm_tty.c
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@ -104,6 +104,35 @@ static const struct tty_operations ops = {
#endif /* CONFIG_PROC_FS */
};
static void ircomm_port_raise_dtr_rts(struct tty_port *port, int raise)
{
struct ircomm_tty_cb *self = container_of(port, struct ircomm_tty_cb,
port);
/*
* Here, we use to lock those two guys, but as ircomm_param_request()
* does it itself, I don't see the point (and I see the deadlock).
* Jean II
*/
if (raise)
self->settings.dte |= IRCOMM_RTS | IRCOMM_DTR;
else
self->settings.dte &= ~(IRCOMM_RTS | IRCOMM_DTR);
ircomm_param_request(self, IRCOMM_DTE, TRUE);
}
static int ircomm_port_carrier_raised(struct tty_port *port)
{
struct ircomm_tty_cb *self = container_of(port, struct ircomm_tty_cb,
port);
return self->settings.dce & IRCOMM_CD;
}
static const struct tty_port_operations ircomm_port_ops = {
.dtr_rts = ircomm_port_raise_dtr_rts,
.carrier_raised = ircomm_port_carrier_raised,
};
/*
* Function ircomm_tty_init()
*
@ -290,15 +319,8 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
port->blocked_open++;
while (1) {
if (tty->termios->c_cflag & CBAUD) {
/* Here, we use to lock those two guys, but
* as ircomm_param_request() does it itself,
* I don't see the point (and I see the deadlock).
* Jean II */
self->settings.dte |= IRCOMM_RTS + IRCOMM_DTR;
ircomm_param_request(self, IRCOMM_DTE, TRUE);
}
if (tty->termios->c_cflag & CBAUD)
tty_port_raise_dtr_rts(port);
current->state = TASK_INTERRUPTIBLE;
@ -315,7 +337,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
* ready
*/
if (!test_bit(ASYNCB_CLOSING, &port->flags) &&
(do_clocal || (self->settings.dce & IRCOMM_CD)) &&
(do_clocal || tty_port_carrier_raised(port)) &&
self->state == IRCOMM_TTY_READY)
{
break;
@ -379,6 +401,7 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp)
}
tty_port_init(&self->port);
self->port.ops = &ircomm_port_ops;
self->magic = IRCOMM_TTY_MAGIC;
self->flow = FLOW_STOP;