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()
277 	    || info->tport.tty->flow.stopped  in transmit_chars()
278 	    || info->tport.tty->hw_stopped) {  in transmit_chars()
293 		tty_wakeup(info->tport.tty);  in transmit_chars()
340 			if (port->tty)  in check_modem_status()
341 				tty_hangup(port->tty);  in check_modem_status()
345 		if (port->tty->hw_stopped) {  in check_modem_status()
350 				port->tty->hw_stopped = false;  in check_modem_status()
357 				tty_wakeup(port->tty);  in check_modem_status()
365 				port->tty->hw_stopped = true;  in check_modem_status()
398 	if (!info->tport.tty)  in ser_rx_int()
417 	  if (!info->tport.tty)  in ser_tx_int()
443 static int startup(struct tty_struct *tty, struct serial_state *info)  in startup()  argument
478 			set_bit(TTY_IO_ERROR, &tty->flags);  in startup()
493 	if (C_BAUD(tty))  in startup()
497 	clear_bit(TTY_IO_ERROR, &tty->flags);  in startup()
503 	change_speed(tty, info, NULL);  in startup()
518 static void shutdown(struct tty_struct *tty, struct serial_state *info)  in shutdown()  argument
553 	if (C_HUPCL(tty))  in shutdown()
557 	set_bit(TTY_IO_ERROR, &tty->flags);  in shutdown()
568 static void change_speed(struct tty_struct *tty, struct serial_state *info,  in change_speed()  argument
577 	cflag = tty->termios.c_cflag;  in change_speed()
596 	baud = tty_get_baud_rate(tty);  in change_speed()
612 		tty->termios.c_cflag &= ~CBAUD;  in change_speed()
613 		tty->termios.c_cflag |= (old_termios->c_cflag & CBAUD);  in change_speed()
614 		baud = tty_get_baud_rate(tty);  in change_speed()
654 	if (I_INPCK(tty))  in change_speed()
656 	if (I_BRKINT(tty) || I_PARMRK(tty))  in change_speed()
663 	if (I_IGNPAR(tty))  in change_speed()
665 	if (I_IGNBRK(tty)) {  in change_speed()
671 		if (I_IGNPAR(tty))  in change_speed()
699 static int rs_put_char(struct tty_struct *tty, u8 ch)  in rs_put_char()  argument
704 	info = tty->driver_data;  in rs_put_char()
723 static void rs_flush_chars(struct tty_struct *tty)  in rs_flush_chars()  argument
725 	struct serial_state *info = tty->driver_data;  in rs_flush_chars()
729 	    || tty->flow.stopped  in rs_flush_chars()
730 	    || tty->hw_stopped  in rs_flush_chars()
744 static ssize_t rs_write(struct tty_struct * tty, const u8 *buf, size_t count)  in rs_write()  argument
747 	struct serial_state *info = tty->driver_data;  in rs_write()
772 	    && !tty->flow.stopped  in rs_write()
773 	    && !tty->hw_stopped  in rs_write()
787 static unsigned int rs_write_room(struct tty_struct *tty)  in rs_write_room()  argument
789 	struct serial_state *info = tty->driver_data;  in rs_write_room()
794 static unsigned int rs_chars_in_buffer(struct tty_struct *tty)  in rs_chars_in_buffer()  argument
796 	struct serial_state *info = tty->driver_data;  in rs_chars_in_buffer()
801 static void rs_flush_buffer(struct tty_struct *tty)  in rs_flush_buffer()  argument
803 	struct serial_state *info = tty->driver_data;  in rs_flush_buffer()
809 	tty_wakeup(tty);  in rs_flush_buffer()
816 static void rs_send_xchar(struct tty_struct *tty, char ch)  in rs_send_xchar()  argument
818 	struct serial_state *info = tty->driver_data;  in rs_send_xchar()
848 static void rs_throttle(struct tty_struct * tty)  in rs_throttle()  argument
850 	struct serial_state *info = tty->driver_data;  in rs_throttle()
853 	printk("throttle %s ....\n", tty_name(tty));  in rs_throttle()
856 	if (I_IXOFF(tty))  in rs_throttle()
857 		rs_send_xchar(tty, STOP_CHAR(tty));  in rs_throttle()
859 	if (C_CRTSCTS(tty))  in rs_throttle()
867 static void rs_unthrottle(struct tty_struct * tty)  in rs_unthrottle()  argument
869 	struct serial_state *info = tty->driver_data;  in rs_unthrottle()
872 	printk("unthrottle %s ....\n", tty_name(tty));  in rs_unthrottle()
875 	if (I_IXOFF(tty)) {  in rs_unthrottle()
879 			rs_send_xchar(tty, START_CHAR(tty));  in rs_unthrottle()
881 	if (C_CRTSCTS(tty))  in rs_unthrottle()
894 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss)  in get_serial_info()  argument
896 	struct serial_state *state = tty->driver_data;  in get_serial_info()
899 	tty_lock(tty);  in get_serial_info()
905 	ss->line = tty->index;  in get_serial_info()
913 	tty_unlock(tty);  in get_serial_info()
917 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss)  in set_serial_info()  argument
919 	struct serial_state *state = tty->driver_data;  in set_serial_info()
925 	tty_lock(tty);  in set_serial_info()
930 		tty_unlock(tty);  in set_serial_info()
945 			tty_unlock(tty);  in set_serial_info()
955 		tty_unlock(tty);  in set_serial_info()
976 				dev_warn_ratelimited(tty->dev, "use of SPD flags is deprecated\n");  in set_serial_info()
977 			change_speed(tty, state, NULL);  in set_serial_info()
980 		retval = startup(tty, state);  in set_serial_info()
981 	tty_unlock(tty);  in set_serial_info()
1012 static int rs_tiocmget(struct tty_struct *tty)  in rs_tiocmget()  argument
1014 	struct serial_state *info = tty->driver_data;  in rs_tiocmget()
1018 	if (tty_io_error(tty))  in rs_tiocmget()
1032 static int rs_tiocmset(struct tty_struct *tty, unsigned int set,  in rs_tiocmset()  argument
1035 	struct serial_state *info = tty->driver_data;  in rs_tiocmset()
1038 	if (tty_io_error(tty))  in rs_tiocmset()
1058 static int rs_break(struct tty_struct *tty, int break_state)  in rs_break()  argument
1078 static int rs_get_icount(struct tty_struct *tty,  in rs_get_icount()  argument
1081 	struct serial_state *info = tty->driver_data;  in rs_get_icount()
1103 static int rs_ioctl(struct tty_struct *tty,  in rs_ioctl()  argument
1106 	struct serial_state *info = tty->driver_data;  in rs_ioctl()
1115 		if (tty_io_error(tty))  in rs_ioctl()
1172 static void rs_set_termios(struct tty_struct *tty, const struct ktermios *old_termios)  in rs_set_termios()  argument
1174 	struct serial_state *info = tty->driver_data;  in rs_set_termios()
1176 	unsigned int cflag = tty->termios.c_cflag;  in rs_set_termios()
1178 	change_speed(tty, info, old_termios);  in rs_set_termios()
1191 		if (!C_CRTSCTS(tty) || !tty_throttled(tty))  in rs_set_termios()
1199 	if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {  in rs_set_termios()
1200 		tty->hw_stopped = false;  in rs_set_termios()
1201 		rs_start(tty);  in rs_set_termios()
1211 	if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))  in rs_set_termios()
1226 static void rs_close(struct tty_struct *tty, struct file * filp)  in rs_close()  argument
1228 	struct serial_state *state = tty->driver_data;  in rs_close()
1231 	if (tty_port_close_start(port, tty, filp) == 0)  in rs_close()
1254 		rs_wait_until_sent(tty, state->timeout);  in rs_close()
1256 	shutdown(tty, state);  in rs_close()
1257 	rs_flush_buffer(tty);  in rs_close()
1259 	tty_ldisc_flush(tty);  in rs_close()
1260 	port->tty = NULL;  in rs_close()
1262 	tty_port_close_end(port, tty);  in rs_close()
1268 static void rs_wait_until_sent(struct tty_struct *tty, int timeout)  in rs_wait_until_sent()  argument
1270 	struct serial_state *info = tty->driver_data;  in rs_wait_until_sent()
1325 static void rs_hangup(struct tty_struct *tty)  in rs_hangup()  argument
1327 	struct serial_state *info = tty->driver_data;  in rs_hangup()
1329 	rs_flush_buffer(tty);  in rs_hangup()
1330 	shutdown(tty, info);  in rs_hangup()
1333 	info->tport.tty = NULL;  in rs_hangup()
1343 static int rs_open(struct tty_struct *tty, struct file * filp)  in rs_open()  argument
1345 	struct tty_port *port = tty->port;  in rs_open()
1351 	port->tty = tty;  in rs_open()
1352 	tty->driver_data = info;  in rs_open()
1354 	retval = startup(tty, info);  in rs_open()
1359 	return tty_port_block_til_ready(port, tty, filp);  in rs_open()