96 static void change_speed(struct tty_struct *tty, struct serial_state *info,
98 static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
133 static void rs_stop(struct tty_struct *tty)  in rs_stop()  argument
135 	struct serial_state *info = tty->driver_data;  in rs_stop()
150 static void rs_start(struct tty_struct *tty)  in rs_start()  argument
152 	struct serial_state *info = tty->driver_data;  in rs_start()
243 	      do_SAK(info->tport.tty);  in receive_chars()
275 	    || info->tport.tty->flow.stopped  in transmit_chars()
276 	    || info->tport.tty->hw_stopped) {  in transmit_chars()
291 		tty_wakeup(info->tport.tty);  in transmit_chars()
338 			if (port->tty)  in check_modem_status()
339 				tty_hangup(port->tty);  in check_modem_status()
343 		if (port->tty->hw_stopped) {  in check_modem_status()
348 				port->tty->hw_stopped = false;  in check_modem_status()
355 				tty_wakeup(port->tty);  in check_modem_status()
363 				port->tty->hw_stopped = true;  in check_modem_status()
396 	if (!info->tport.tty)  in ser_rx_int()
415 	  if (!info->tport.tty)  in ser_tx_int()
441 static int startup(struct tty_struct *tty, struct serial_state *info)  in startup()  argument
476 			set_bit(TTY_IO_ERROR, &tty->flags);  in startup()
491 	if (C_BAUD(tty))  in startup()
495 	clear_bit(TTY_IO_ERROR, &tty->flags);  in startup()
501 	change_speed(tty, info, NULL);  in startup()
516 static void shutdown(struct tty_struct *tty, struct serial_state *info)  in shutdown()  argument
551 	if (C_HUPCL(tty))  in shutdown()
555 	set_bit(TTY_IO_ERROR, &tty->flags);  in shutdown()
566 static void change_speed(struct tty_struct *tty, struct serial_state *info,  in change_speed()  argument
575 	cflag = tty->termios.c_cflag;  in change_speed()
594 	baud = tty_get_baud_rate(tty);  in change_speed()
610 		tty->termios.c_cflag &= ~CBAUD;  in change_speed()
611 		tty->termios.c_cflag |= (old_termios->c_cflag & CBAUD);  in change_speed()
612 		baud = tty_get_baud_rate(tty);  in change_speed()
652 	if (I_INPCK(tty))  in change_speed()
654 	if (I_BRKINT(tty) || I_PARMRK(tty))  in change_speed()
661 	if (I_IGNPAR(tty))  in change_speed()
663 	if (I_IGNBRK(tty)) {  in change_speed()
669 		if (I_IGNPAR(tty))  in change_speed()
697 static int rs_put_char(struct tty_struct *tty, u8 ch)  in rs_put_char()  argument
702 	info = tty->driver_data;  in rs_put_char()
721 static void rs_flush_chars(struct tty_struct *tty)  in rs_flush_chars()  argument
723 	struct serial_state *info = tty->driver_data;  in rs_flush_chars()
727 	    || tty->flow.stopped  in rs_flush_chars()
728 	    || tty->hw_stopped  in rs_flush_chars()
742 static ssize_t rs_write(struct tty_struct * tty, const u8 *buf, size_t count)  in rs_write()  argument
745 	struct serial_state *info = tty->driver_data;  in rs_write()
770 	    && !tty->flow.stopped  in rs_write()
771 	    && !tty->hw_stopped  in rs_write()
785 static unsigned int rs_write_room(struct tty_struct *tty)  in rs_write_room()  argument
787 	struct serial_state *info = tty->driver_data;  in rs_write_room()
792 static unsigned int rs_chars_in_buffer(struct tty_struct *tty)  in rs_chars_in_buffer()  argument
794 	struct serial_state *info = tty->driver_data;  in rs_chars_in_buffer()
799 static void rs_flush_buffer(struct tty_struct *tty)  in rs_flush_buffer()  argument
801 	struct serial_state *info = tty->driver_data;  in rs_flush_buffer()
807 	tty_wakeup(tty);  in rs_flush_buffer()
814 static void rs_send_xchar(struct tty_struct *tty, u8 ch)  in rs_send_xchar()  argument
816 	struct serial_state *info = tty->driver_data;  in rs_send_xchar()
846 static void rs_throttle(struct tty_struct * tty)  in rs_throttle()  argument
848 	struct serial_state *info = tty->driver_data;  in rs_throttle()
851 	printk("throttle %s ....\n", tty_name(tty));  in rs_throttle()
854 	if (I_IXOFF(tty))  in rs_throttle()
855 		rs_send_xchar(tty, STOP_CHAR(tty));  in rs_throttle()
857 	if (C_CRTSCTS(tty))  in rs_throttle()
865 static void rs_unthrottle(struct tty_struct * tty)  in rs_unthrottle()  argument
867 	struct serial_state *info = tty->driver_data;  in rs_unthrottle()
870 	printk("unthrottle %s ....\n", tty_name(tty));  in rs_unthrottle()
873 	if (I_IXOFF(tty)) {  in rs_unthrottle()
877 			rs_send_xchar(tty, START_CHAR(tty));  in rs_unthrottle()
879 	if (C_CRTSCTS(tty))  in rs_unthrottle()
892 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss)  in get_serial_info()  argument
894 	struct serial_state *state = tty->driver_data;  in get_serial_info()
897 	tty_lock(tty);  in get_serial_info()
903 	ss->line = tty->index;  in get_serial_info()
911 	tty_unlock(tty);  in get_serial_info()
915 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss)  in set_serial_info()  argument
917 	struct serial_state *state = tty->driver_data;  in set_serial_info()
923 	tty_lock(tty);  in set_serial_info()
928 		tty_unlock(tty);  in set_serial_info()
943 			tty_unlock(tty);  in set_serial_info()
953 		tty_unlock(tty);  in set_serial_info()
974 				dev_warn_ratelimited(tty->dev, "use of SPD flags is deprecated\n");  in set_serial_info()
975 			change_speed(tty, state, NULL);  in set_serial_info()
978 		retval = startup(tty, state);  in set_serial_info()
979 	tty_unlock(tty);  in set_serial_info()
1010 static int rs_tiocmget(struct tty_struct *tty)  in rs_tiocmget()  argument
1012 	struct serial_state *info = tty->driver_data;  in rs_tiocmget()
1016 	if (tty_io_error(tty))  in rs_tiocmget()
1030 static int rs_tiocmset(struct tty_struct *tty, unsigned int set,  in rs_tiocmset()  argument
1033 	struct serial_state *info = tty->driver_data;  in rs_tiocmset()
1036 	if (tty_io_error(tty))  in rs_tiocmset()
1056 static int rs_break(struct tty_struct *tty, int break_state)  in rs_break()  argument
1076 static int rs_get_icount(struct tty_struct *tty,  in rs_get_icount()  argument
1079 	struct serial_state *info = tty->driver_data;  in rs_get_icount()
1101 static int rs_ioctl(struct tty_struct *tty,  in rs_ioctl()  argument
1104 	struct serial_state *info = tty->driver_data;  in rs_ioctl()
1113 		if (tty_io_error(tty))  in rs_ioctl()
1170 static void rs_set_termios(struct tty_struct *tty, const struct ktermios *old_termios)  in rs_set_termios()  argument
1172 	struct serial_state *info = tty->driver_data;  in rs_set_termios()
1174 	unsigned int cflag = tty->termios.c_cflag;  in rs_set_termios()
1176 	change_speed(tty, info, old_termios);  in rs_set_termios()
1189 		if (!C_CRTSCTS(tty) || !tty_throttled(tty))  in rs_set_termios()
1197 	if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {  in rs_set_termios()
1198 		tty->hw_stopped = false;  in rs_set_termios()
1199 		rs_start(tty);  in rs_set_termios()
1209 	if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))  in rs_set_termios()
1224 static void rs_close(struct tty_struct *tty, struct file * filp)  in rs_close()  argument
1226 	struct serial_state *state = tty->driver_data;  in rs_close()
1229 	if (tty_port_close_start(port, tty, filp) == 0)  in rs_close()
1252 		rs_wait_until_sent(tty, state->timeout);  in rs_close()
1254 	shutdown(tty, state);  in rs_close()
1255 	rs_flush_buffer(tty);  in rs_close()
1257 	tty_ldisc_flush(tty);  in rs_close()
1258 	port->tty = NULL;  in rs_close()
1260 	tty_port_close_end(port, tty);  in rs_close()
1266 static void rs_wait_until_sent(struct tty_struct *tty, int timeout)  in rs_wait_until_sent()  argument
1268 	struct serial_state *info = tty->driver_data;  in rs_wait_until_sent()
1323 static void rs_hangup(struct tty_struct *tty)  in rs_hangup()  argument
1325 	struct serial_state *info = tty->driver_data;  in rs_hangup()
1327 	rs_flush_buffer(tty);  in rs_hangup()
1328 	shutdown(tty, info);  in rs_hangup()
1331 	info->tport.tty = NULL;  in rs_hangup()
1341 static int rs_open(struct tty_struct *tty, struct file * filp)  in rs_open()  argument
1343 	struct tty_port *port = tty->port;  in rs_open()
1349 	port->tty = tty;  in rs_open()
1350 	tty->driver_data = info;  in rs_open()
1352 	retval = startup(tty, info);  in rs_open()
1357 	return tty_port_block_til_ready(port, tty, filp);  in rs_open()