static int hvsi_tiocmget(struct tty_struct *tty, struct file *file)
{
struct hvsi_struct *hp = (struct hvsi_struct *)tty->driver_data;
hvsi_get_mctrl(hp);
return hp->mctrl;
}
static int __init hvsi_console_setup(struct console *console, char *options)
{
struct hvsi_struct *hp = &hvsi_ports[console->index];
int ret;
if (console->index < 0 || console->index >= hvsi_count)
return -1;
/* give the FSP a chance to change the baud rate when we re-open */
hvsi_close_protocol(hp);
ret = hvsi_handshake(hp);
if (ret < 0)
return ret;
ret = hvsi_get_mctrl(hp);
if (ret < 0)
return ret;
ret = hvsi_set_mctrl(hp, hp->mctrl | TIOCM_DTR);
if (ret < 0)
return ret;
hp->flags |= HVSI_CONSOLE;
return 0;
}
static int hvsi_open(struct tty_struct *tty, struct file *filp)
{
struct hvsi_struct *hp;
unsigned long flags;
int line = tty->index;
int ret;
pr_debug("%s\n", __FUNCTION__);
if (line < 0 || line >= hvsi_count)
return -ENODEV;
hp = &hvsi_ports[line];
tty->driver_data = hp;
tty->low_latency = 1; /* avoid throttle/tty_flip_buffer_push race */
mb();
if (hp->state == HVSI_FSP_DIED)
return -EIO;
spin_lock_irqsave(&hp->lock, flags);
hp->tty = tty;
hp->count++;
atomic_set(&hp->seqno, 0);
h_vio_signal(hp->vtermno, VIO_IRQ_ENABLE);
spin_unlock_irqrestore(&hp->lock, flags);
if (is_console(hp))
return 0; /* this has already been handshaked as the console */
ret = hvsi_handshake(hp);
if (ret < 0) {
printk(KERN_ERR "%s: HVSI handshaking failed\n", tty->name);
return ret;
}
ret = hvsi_get_mctrl(hp);
if (ret < 0) {
printk(KERN_ERR "%s: couldn't get initial modem flags\n", tty->name);
return ret;
}
ret = hvsi_set_mctrl(hp, hp->mctrl | TIOCM_DTR);
if (ret < 0) {
printk(KERN_ERR "%s: couldn't set DTR\n", tty->name);
return ret;
}
return 0;
}
static int hvsi_open(struct tty_struct *tty, struct file *filp)
{
struct hvsi_struct *hp;
unsigned long flags;
int line = tty->index;
int ret;
pr_debug("%s\n", __func__);
if (line < 0 || line >= hvsi_count)
return -ENODEV;
hp = &hvsi_ports[line];
tty->driver_data = hp;
mb();
if (hp->state == HVSI_FSP_DIED)
return -EIO;
spin_lock_irqsave(&hp->lock, flags);
hp->tty = tty;
hp->count++;
atomic_set(&hp->seqno, 0);
h_vio_signal(hp->vtermno, VIO_IRQ_ENABLE);
spin_unlock_irqrestore(&hp->lock, flags);
if (is_console(hp))
return 0; /* this has already been handshaked as the console */
ret = hvsi_handshake(hp);
if (ret < 0) {
;
return ret;
}
ret = hvsi_get_mctrl(hp);
if (ret < 0) {
;
return ret;
}
ret = hvsi_set_mctrl(hp, hp->mctrl | TIOCM_DTR);
if (ret < 0) {
;
return ret;
}
return 0;
}
