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tty: moxa: Use more tty_port ops
Rework a few bits of this into tty_port format Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Cox
Greg Kroah-Hartman
parent
2493c0c166
commit
f176178ba0
1 changed files with 21 additions and 116 deletions
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@ -206,8 +206,9 @@ static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
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static void moxa_poll(unsigned long);
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static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
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static void moxa_setup_empty_event(struct tty_struct *);
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static void moxa_shut_down(struct tty_struct *);
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static void moxa_shutdown(struct tty_port *);
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static int moxa_carrier_raised(struct tty_port *);
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static void moxa_dtr_rts(struct tty_port *, int);
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/*
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* moxa board interface functions:
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*/
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@ -409,6 +410,8 @@ static const struct tty_operations moxa_ops = {
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static const struct tty_port_operations moxa_port_ops = {
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.carrier_raised = moxa_carrier_raised,
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.dtr_rts = moxa_dtr_rts,
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.shutdown = moxa_shutdown,
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};
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static struct tty_driver *moxaDriver;
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@ -1112,14 +1115,12 @@ static void __exit moxa_exit(void)
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module_init(moxa_init);
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module_exit(moxa_exit);
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static void moxa_close_port(struct tty_struct *tty)
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static void moxa_shutdown(struct tty_port *port)
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{
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struct moxa_port *ch = tty->driver_data;
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moxa_shut_down(tty);
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struct moxa_port *ch = container_of(port, struct moxa_port, port);
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MoxaPortDisable(ch);
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MoxaPortFlushData(ch, 2);
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ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
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tty->driver_data = NULL;
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tty_port_tty_set(&ch->port, NULL);
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clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags);
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}
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static int moxa_carrier_raised(struct tty_port *port)
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@ -1133,39 +1134,13 @@ static int moxa_carrier_raised(struct tty_port *port)
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return dcd;
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}
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static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
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struct moxa_port *ch)
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static void moxa_dtr_rts(struct tty_port *port, int onoff)
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{
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struct tty_port *port = &ch->port;
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DEFINE_WAIT(wait);
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int retval = 0;
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u8 dcd;
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while (1) {
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prepare_to_wait(&port->open_wait, &wait, TASK_INTERRUPTIBLE);
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if (tty_hung_up_p(filp)) {
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#ifdef SERIAL_DO_RESTART
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retval = -ERESTARTSYS;
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#else
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retval = -EAGAIN;
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#endif
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break;
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}
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dcd = tty_port_carrier_raised(port);
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if (dcd)
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break;
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if (signal_pending(current)) {
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retval = -ERESTARTSYS;
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break;
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}
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schedule();
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}
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finish_wait(&port->open_wait, &wait);
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return retval;
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struct moxa_port *ch = container_of(port, struct moxa_port, port);
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MoxaPortLineCtrl(ch, onoff, onoff);
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}
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static int moxa_open(struct tty_struct *tty, struct file *filp)
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{
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struct moxa_board_conf *brd;
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@ -1194,6 +1169,7 @@ static int moxa_open(struct tty_struct *tty, struct file *filp)
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ch->port.count++;
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tty->driver_data = ch;
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tty_port_tty_set(&ch->port, tty);
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mutex_lock(&ch->port.mutex);
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if (!(ch->port.flags & ASYNC_INITIALIZED)) {
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ch->statusflags = 0;
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moxa_set_tty_param(tty, tty->termios);
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@ -1202,57 +1178,21 @@ static int moxa_open(struct tty_struct *tty, struct file *filp)
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MoxaSetFifo(ch, ch->type == PORT_16550A);
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ch->port.flags |= ASYNC_INITIALIZED;
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}
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mutex_unlock(&ch->port.mutex);
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mutex_unlock(&moxa_openlock);
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retval = 0;
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if (!(filp->f_flags & O_NONBLOCK) && !C_CLOCAL(tty))
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retval = moxa_block_till_ready(tty, filp, ch);
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mutex_lock(&moxa_openlock);
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if (retval) {
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if (ch->port.count) /* 0 means already hung up... */
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if (--ch->port.count == 0)
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moxa_close_port(tty);
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} else
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ch->port.flags |= ASYNC_NORMAL_ACTIVE;
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mutex_unlock(&moxa_openlock);
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retval = tty_port_block_til_ready(&ch->port, tty, filp);
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if (retval == 0)
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set_bit(ASYNCB_NORMAL_ACTIVE, &ch->port.flags);
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return retval;
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}
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static void moxa_close(struct tty_struct *tty, struct file *filp)
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{
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struct moxa_port *ch;
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int port;
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port = tty->index;
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if (port == MAX_PORTS || tty_hung_up_p(filp))
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return;
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mutex_lock(&moxa_openlock);
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ch = tty->driver_data;
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if (ch == NULL)
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goto unlock;
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if (tty->count == 1 && ch->port.count != 1) {
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printk(KERN_WARNING "moxa_close: bad serial port count; "
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"tty->count is 1, ch->port.count is %d\n", ch->port.count);
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ch->port.count = 1;
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}
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if (--ch->port.count < 0) {
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printk(KERN_WARNING "moxa_close: bad serial port count, "
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"device=%s\n", tty->name);
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ch->port.count = 0;
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}
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if (ch->port.count)
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goto unlock;
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struct moxa_port *ch = tty->driver_data;
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ch->cflag = tty->termios->c_cflag;
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if (ch->port.flags & ASYNC_INITIALIZED) {
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moxa_setup_empty_event(tty);
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tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
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}
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moxa_close_port(tty);
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unlock:
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mutex_lock(&moxa_openlock);
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tty_port_close(&ch->port, tty, filp);
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mutex_unlock(&moxa_openlock);
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}
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@ -1300,14 +1240,6 @@ static int moxa_chars_in_buffer(struct tty_struct *tty)
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struct moxa_port *ch = tty->driver_data;
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int chars;
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/*
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* Sigh...I have to check if driver_data is NULL here, because
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* if an open() fails, the TTY subsystem eventually calls
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* tty_wait_until_sent(), which calls the driver's chars_in_buffer()
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* routine. And since the open() failed, we return 0 here. TDJ
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*/
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if (ch == NULL)
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return 0;
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lock_kernel();
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chars = MoxaPortTxQueue(ch);
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if (chars) {
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@ -1436,15 +1368,8 @@ static void moxa_hangup(struct tty_struct *tty)
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mutex_lock(&moxa_openlock);
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ch = tty->driver_data;
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if (ch == NULL) {
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mutex_unlock(&moxa_openlock);
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return;
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}
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ch->port.count = 0;
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moxa_close_port(tty);
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tty_port_hangup(&ch->port);
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mutex_unlock(&moxa_openlock);
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wake_up_interruptible(&ch->port.open_wait);
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}
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static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
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@ -1597,26 +1522,6 @@ static void moxa_setup_empty_event(struct tty_struct *tty)
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spin_unlock_bh(&moxa_lock);
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}
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static void moxa_shut_down(struct tty_struct *tty)
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{
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struct moxa_port *ch = tty->driver_data;
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if (!(ch->port.flags & ASYNC_INITIALIZED))
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return;
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MoxaPortDisable(ch);
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/*
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* If we're a modem control device and HUPCL is on, drop RTS & DTR.
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*/
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if (C_HUPCL(tty))
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MoxaPortLineCtrl(ch, 0, 0);
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spin_lock_bh(&moxa_lock);
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ch->port.flags &= ~ASYNC_INITIALIZED;
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spin_unlock_bh(&moxa_lock);
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}
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/*****************************************************************************
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* Driver level functions: *
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*****************************************************************************/
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