can/slcan/slcan-core.c

2  * slcan.c - serial line CAN interface driver (using tty line discipline)
48 #include <linux/tty.h>
84 	struct tty_struct	*tty;		/* ptr to TTY structure	     */
455 /* parse tty input stream */
536 	set_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
537 	actual = sl->tty->ops->write(sl->tty, sl->xbuff, pos - sl->xbuff);
542 /* Write out any remaining transmit buffer. Scheduled when tty is writable */
559 			clear_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
569 		clear_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
575 	actual = sl->tty->ops->write(sl->tty, sl->xhead, sl->xleft);
584 static void slcan_write_wakeup(struct tty_struct *tty)
586 	struct slcan *sl = tty->disc_data;
606 	if (!sl->tty) {
631 	if (!sl->tty) {
637 	set_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
638 	actual = sl->tty->ops->write(sl->tty, sl->xbuff, n);
671 	clear_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
777 static void slcan_receive_buf(struct tty_struct *tty, const u8 *cp,
780 	struct slcan *sl = tty->disc_data;
803 static int slcan_open(struct tty_struct *tty)
812 	if (!tty->ops->write)
822 	tty->receive_room = 65536; /* We don't flow control */
840 	sl->tty = tty;
841 	tty->disc_data = sl;
850 	netdev_info(dev, "slcan on %s.\n", tty->name);
862 static void slcan_close(struct tty_struct *tty)
864 	struct slcan *sl = tty->disc_data;
876 	tty->disc_data = NULL;
877 	sl->tty = NULL;
880 	netdev_info(sl->dev, "slcan off %s.\n", tty->name);
885 static int slcan_ioctl(struct tty_struct *tty, unsigned int cmd,
888 	struct slcan *sl = tty->disc_data;
902 		return tty_mode_ioctl(tty, cmd, arg);