54 static void uart_change_speed(struct tty_struct *tty, struct uart_state *state,
56 static void uart_wait_until_sent(struct tty_struct *tty, int timeout);
79 	tty_wakeup(state->port.tty);  in uart_write_wakeup()
82 static void uart_stop(struct tty_struct *tty)  in uart_stop()  argument
84 	struct uart_state *state = tty->driver_data;  in uart_stop()
93 static void __uart_start(struct tty_struct *tty)  in __uart_start()  argument
95 	struct uart_state *state = tty->driver_data;  in __uart_start()
102 static void uart_start(struct tty_struct *tty)  in uart_start()  argument
104 	struct uart_state *state = tty->driver_data;  in uart_start()
109 	__uart_start(tty);  in uart_start()
134 static int uart_port_startup(struct tty_struct *tty, struct uart_state *state,  in uart_port_startup()  argument
166 			tty->termios.c_cflag = uport->cons->cflag;  in uart_port_startup()
172 		uart_change_speed(tty, state, NULL);  in uart_port_startup()
179 			if (tty->termios.c_cflag & CBAUD)  in uart_port_startup()
195 static int uart_startup(struct tty_struct *tty, struct uart_state *state,  in uart_startup()  argument
208 	set_bit(TTY_IO_ERROR, &tty->flags);  in uart_startup()
210 	retval = uart_port_startup(tty, state, init_hw);  in uart_startup()
213 		clear_bit(TTY_IO_ERROR, &tty->flags);  in uart_startup()
225 static void uart_shutdown(struct tty_struct *tty, struct uart_state *state)  in uart_shutdown()  argument
233 	if (tty)  in uart_shutdown()
234 		set_bit(TTY_IO_ERROR, &tty->flags);  in uart_shutdown()
240 		if (uart_console(uport) && tty)  in uart_shutdown()
241 			uport->cons->cflag = tty->termios.c_cflag;  in uart_shutdown()
243 		if (!tty || (tty->termios.c_cflag & HUPCL))  in uart_shutdown()
432 static void uart_change_speed(struct tty_struct *tty, struct uart_state *state,  in uart_change_speed()  argument
443 	if (!tty || uport->type == PORT_UNKNOWN)  in uart_change_speed()
446 	termios = &tty->termios;  in uart_change_speed()
472 			__uart_start(tty);  in uart_change_speed()
496 static int uart_put_char(struct tty_struct *tty, unsigned char ch)  in uart_put_char()  argument
498 	struct uart_state *state = tty->driver_data;  in uart_put_char()
503 static void uart_flush_chars(struct tty_struct *tty)  in uart_flush_chars()  argument
505 	uart_start(tty);  in uart_flush_chars()
508 static int uart_write(struct tty_struct *tty,  in uart_write()  argument
511 	struct uart_state *state = tty->driver_data;  in uart_write()
546 	__uart_start(tty);  in uart_write()
552 static int uart_write_room(struct tty_struct *tty)  in uart_write_room()  argument
554 	struct uart_state *state = tty->driver_data;  in uart_write_room()
564 static int uart_chars_in_buffer(struct tty_struct *tty)  in uart_chars_in_buffer()  argument
566 	struct uart_state *state = tty->driver_data;  in uart_chars_in_buffer()
576 static void uart_flush_buffer(struct tty_struct *tty)  in uart_flush_buffer()  argument
578 	struct uart_state *state = tty->driver_data;  in uart_flush_buffer()
592 	pr_debug("uart_flush_buffer(%d) called\n", tty->index);  in uart_flush_buffer()
599 	tty_wakeup(tty);  in uart_flush_buffer()
606 static void uart_send_xchar(struct tty_struct *tty, char ch)  in uart_send_xchar()  argument
608 	struct uart_state *state = tty->driver_data;  in uart_send_xchar()
623 static void uart_throttle(struct tty_struct *tty)  in uart_throttle()  argument
625 	struct uart_state *state = tty->driver_data;  in uart_throttle()
629 	if (I_IXOFF(tty))  in uart_throttle()
631 	if (tty->termios.c_cflag & CRTSCTS)  in uart_throttle()
640 		uart_send_xchar(tty, STOP_CHAR(tty));  in uart_throttle()
646 static void uart_unthrottle(struct tty_struct *tty)  in uart_unthrottle()  argument
648 	struct uart_state *state = tty->driver_data;  in uart_unthrottle()
652 	if (I_IXOFF(tty))  in uart_unthrottle()
654 	if (tty->termios.c_cflag & CRTSCTS)  in uart_unthrottle()
663 		uart_send_xchar(tty, START_CHAR(tty));  in uart_unthrottle()
718 static int uart_set_info(struct tty_struct *tty, struct tty_port *port,  in uart_set_info()  argument
802 		uart_shutdown(tty, state);  in uart_set_info()
902 				      tty_name(port->tty, buf));  in uart_set_info()
904 			uart_change_speed(tty, state, NULL);  in uart_set_info()
907 		retval = uart_startup(tty, state, 1);  in uart_set_info()
912 static int uart_set_info_user(struct tty_struct *tty, struct uart_state *state,  in uart_set_info_user()  argument
930 	retval = uart_set_info(tty, port, state, &new_serial);  in uart_set_info_user()
943 static int uart_get_lsr_info(struct tty_struct *tty,  in uart_get_lsr_info()  argument
965 static int uart_tiocmget(struct tty_struct *tty)  in uart_tiocmget()  argument
967 	struct uart_state *state = tty->driver_data;  in uart_tiocmget()
973 	if (!(tty->flags & (1 << TTY_IO_ERROR))) {  in uart_tiocmget()
985 uart_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear)  in uart_tiocmset()  argument
987 	struct uart_state *state = tty->driver_data;  in uart_tiocmset()
993 	if (!(tty->flags & (1 << TTY_IO_ERROR))) {  in uart_tiocmset()
1001 static int uart_break_ctl(struct tty_struct *tty, int break_state)  in uart_break_ctl()  argument
1003 	struct uart_state *state = tty->driver_data;  in uart_break_ctl()
1016 static int uart_do_autoconfig(struct tty_struct *tty,struct uart_state *state)  in uart_do_autoconfig()  argument
1035 		uart_shutdown(tty, state);  in uart_do_autoconfig()
1054 		ret = uart_startup(tty, state, 1);  in uart_do_autoconfig()
1133 static int uart_get_icount(struct tty_struct *tty,  in uart_get_icount()  argument
1136 	struct uart_state *state = tty->driver_data;  in uart_get_icount()
1204 uart_ioctl(struct tty_struct *tty, unsigned int cmd,  in uart_ioctl()  argument
1207 	struct uart_state *state = tty->driver_data;  in uart_ioctl()
1222 		down_write(&tty->termios_rwsem);  in uart_ioctl()
1223 		ret = uart_set_info_user(tty, state, uarg);  in uart_ioctl()
1224 		up_write(&tty->termios_rwsem);  in uart_ioctl()
1228 		down_write(&tty->termios_rwsem);  in uart_ioctl()
1229 		ret = uart_do_autoconfig(tty, state);  in uart_ioctl()
1230 		up_write(&tty->termios_rwsem);  in uart_ioctl()
1242 	if (tty->flags & (1 << TTY_IO_ERROR)) {  in uart_ioctl()
1261 	if (tty->flags & (1 << TTY_IO_ERROR)) {  in uart_ioctl()
1273 		ret = uart_get_lsr_info(tty, state, uarg);  in uart_ioctl()
1296 static void uart_set_ldisc(struct tty_struct *tty)  in uart_set_ldisc()  argument
1298 	struct uart_state *state = tty->driver_data;  in uart_set_ldisc()
1303 		uport->ops->set_ldisc(uport, &tty->termios);  in uart_set_ldisc()
1308 static void uart_set_termios(struct tty_struct *tty,  in uart_set_termios()  argument
1311 	struct uart_state *state = tty->driver_data;  in uart_set_termios()
1313 	unsigned int cflag = tty->termios.c_cflag;  in uart_set_termios()
1324 		   tty->termios.c_cc[VSTART] != old_termios->c_cc[VSTART] ||  in uart_set_termios()
1325 		   tty->termios.c_cc[VSTOP] != old_termios->c_cc[VSTOP];  in uart_set_termios()
1335 	    tty->termios.c_ospeed == old_termios->c_ospeed &&  in uart_set_termios()
1336 	    tty->termios.c_ispeed == old_termios->c_ispeed &&  in uart_set_termios()
1337 	    ((tty->termios.c_iflag ^ old_termios->c_iflag) & iflag_mask) == 0 &&  in uart_set_termios()
1343 	uart_change_speed(tty, state, old_termios);  in uart_set_termios()
1346 	cflag = tty->termios.c_cflag;  in uart_set_termios()
1354 		if (!(cflag & CRTSCTS) || !test_bit(TTY_THROTTLED, &tty->flags))  in uart_set_termios()
1366 static void uart_close(struct tty_struct *tty, struct file *filp)  in uart_close()  argument
1368 	struct uart_state *state = tty->driver_data;  in uart_close()
1374 		struct uart_driver *drv = tty->driver->driver_state;  in uart_close()
1376 		state = drv->state + tty->index;  in uart_close()
1389 	if (!port->count || tty_port_close_start(port, tty, filp) == 0)  in uart_close()
1406 		uart_wait_until_sent(tty, uport->timeout);  in uart_close()
1410 	uart_shutdown(tty, state);  in uart_close()
1437 	tty_ldisc_flush(tty);  in uart_close()
1438 	tty->closing = 0;  in uart_close()
1441 static void uart_wait_until_sent(struct tty_struct *tty, int timeout)  in uart_wait_until_sent()  argument
1443 	struct uart_state *state = tty->driver_data;  in uart_wait_until_sent()
1501 static void uart_hangup(struct tty_struct *tty)  in uart_hangup()  argument
1503 	struct uart_state *state = tty->driver_data;  in uart_hangup()
1511 		uart_flush_buffer(tty);  in uart_hangup()
1512 		uart_shutdown(tty, state);  in uart_hangup()
1526 static int uart_port_activate(struct tty_port *port, struct tty_struct *tty)  in uart_port_activate()  argument
1591 static int uart_open(struct tty_struct *tty, struct file *filp)  in uart_open()  argument
1593 	struct uart_driver *drv = (struct uart_driver *)tty->driver->driver_state;  in uart_open()
1594 	int retval, line = tty->index;  in uart_open()
1621 	tty->driver_data = state;  in uart_open()
1625 	tty_port_tty_set(port, tty);  in uart_open()
1630 	retval = uart_startup(tty, state, 0);  in uart_open()
1637 		retval = tty_port_block_til_ready(port, tty, filp);  in uart_open()
2119 		if (port->tty && termios.c_cflag == 0)  in uart_resume_port()
2120 			termios = port->tty->termios;  in uart_resume_port()
2139 			struct tty_struct *tty = port->tty;  in uart_resume_port()  local
2142 				if (tty)  in uart_resume_port()
2143 					uart_change_speed(tty, state, NULL);  in uart_resume_port()
2155 				uart_shutdown(tty, state);  in uart_resume_port()
2753 	struct tty_struct *tty;  in uart_remove_one_port()  local
2782 	tty = tty_port_tty_get(port);  in uart_remove_one_port()
2783 	if (tty) {  in uart_remove_one_port()
2784 		tty_vhangup(port->tty);  in uart_remove_one_port()
2785 		tty_kref_put(tty);  in uart_remove_one_port()
2848 	struct tty_struct *tty = port->tty;  in uart_handle_dcd_change()  local
2853 	if (tty) {  in uart_handle_dcd_change()
2854 		ld = tty_ldisc_ref(tty);  in uart_handle_dcd_change()
2857 				ld->ops->dcd_change(tty, status);  in uart_handle_dcd_change()
2867 		else if (tty)  in uart_handle_dcd_change()
2868 			tty_hangup(tty);  in uart_handle_dcd_change()