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()
443 static void uart_change_speed(struct tty_struct *tty, struct uart_state *state,  in uart_change_speed()  argument
454 	if (!tty || uport->type == PORT_UNKNOWN)  in uart_change_speed()
457 	termios = &tty->termios;  in uart_change_speed()
483 			__uart_start(tty);  in uart_change_speed()
507 static int uart_put_char(struct tty_struct *tty, unsigned char ch)  in uart_put_char()  argument
509 	struct uart_state *state = tty->driver_data;  in uart_put_char()
514 static void uart_flush_chars(struct tty_struct *tty)  in uart_flush_chars()  argument
516 	uart_start(tty);  in uart_flush_chars()
519 static int uart_write(struct tty_struct *tty,  in uart_write()  argument
522 	struct uart_state *state = tty->driver_data;  in uart_write()
557 	__uart_start(tty);  in uart_write()
563 static int uart_write_room(struct tty_struct *tty)  in uart_write_room()  argument
565 	struct uart_state *state = tty->driver_data;  in uart_write_room()
575 static int uart_chars_in_buffer(struct tty_struct *tty)  in uart_chars_in_buffer()  argument
577 	struct uart_state *state = tty->driver_data;  in uart_chars_in_buffer()
587 static void uart_flush_buffer(struct tty_struct *tty)  in uart_flush_buffer()  argument
589 	struct uart_state *state = tty->driver_data;  in uart_flush_buffer()
603 	pr_debug("uart_flush_buffer(%d) called\n", tty->index);  in uart_flush_buffer()
610 	tty_wakeup(tty);  in uart_flush_buffer()
617 static void uart_send_xchar(struct tty_struct *tty, char ch)  in uart_send_xchar()  argument
619 	struct uart_state *state = tty->driver_data;  in uart_send_xchar()
634 static void uart_throttle(struct tty_struct *tty)  in uart_throttle()  argument
636 	struct uart_state *state = tty->driver_data;  in uart_throttle()
640 	if (I_IXOFF(tty))  in uart_throttle()
642 	if (tty->termios.c_cflag & CRTSCTS)  in uart_throttle()
651 		uart_send_xchar(tty, STOP_CHAR(tty));  in uart_throttle()
657 static void uart_unthrottle(struct tty_struct *tty)  in uart_unthrottle()  argument
659 	struct uart_state *state = tty->driver_data;  in uart_unthrottle()
663 	if (I_IXOFF(tty))  in uart_unthrottle()
665 	if (tty->termios.c_cflag & CRTSCTS)  in uart_unthrottle()
674 		uart_send_xchar(tty, START_CHAR(tty));  in uart_unthrottle()
729 static int uart_set_info(struct tty_struct *tty, struct tty_port *port,  in uart_set_info()  argument
813 		uart_shutdown(tty, state);  in uart_set_info()
911 				      tty_name(port->tty));  in uart_set_info()
913 			uart_change_speed(tty, state, NULL);  in uart_set_info()
916 		retval = uart_startup(tty, state, 1);  in uart_set_info()
921 static int uart_set_info_user(struct tty_struct *tty, struct uart_state *state,  in uart_set_info_user()  argument
939 	retval = uart_set_info(tty, port, state, &new_serial);  in uart_set_info_user()
952 static int uart_get_lsr_info(struct tty_struct *tty,  in uart_get_lsr_info()  argument
974 static int uart_tiocmget(struct tty_struct *tty)  in uart_tiocmget()  argument
976 	struct uart_state *state = tty->driver_data;  in uart_tiocmget()
982 	if (!(tty->flags & (1 << TTY_IO_ERROR))) {  in uart_tiocmget()
994 uart_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear)  in uart_tiocmset()  argument
996 	struct uart_state *state = tty->driver_data;  in uart_tiocmset()
1002 	if (!(tty->flags & (1 << TTY_IO_ERROR))) {  in uart_tiocmset()
1010 static int uart_break_ctl(struct tty_struct *tty, int break_state)  in uart_break_ctl()  argument
1012 	struct uart_state *state = tty->driver_data;  in uart_break_ctl()
1025 static int uart_do_autoconfig(struct tty_struct *tty,struct uart_state *state)  in uart_do_autoconfig()  argument
1044 		uart_shutdown(tty, state);  in uart_do_autoconfig()
1063 		ret = uart_startup(tty, state, 1);  in uart_do_autoconfig()
1142 static int uart_get_icount(struct tty_struct *tty,  in uart_get_icount()  argument
1145 	struct uart_state *state = tty->driver_data;  in uart_get_icount()
1213 uart_ioctl(struct tty_struct *tty, unsigned int cmd,  in uart_ioctl()  argument
1216 	struct uart_state *state = tty->driver_data;  in uart_ioctl()
1231 		down_write(&tty->termios_rwsem);  in uart_ioctl()
1232 		ret = uart_set_info_user(tty, state, uarg);  in uart_ioctl()
1233 		up_write(&tty->termios_rwsem);  in uart_ioctl()
1237 		down_write(&tty->termios_rwsem);  in uart_ioctl()
1238 		ret = uart_do_autoconfig(tty, state);  in uart_ioctl()
1239 		up_write(&tty->termios_rwsem);  in uart_ioctl()
1251 	if (tty->flags & (1 << TTY_IO_ERROR)) {  in uart_ioctl()
1270 	if (tty->flags & (1 << TTY_IO_ERROR)) {  in uart_ioctl()
1282 		ret = uart_get_lsr_info(tty, state, uarg);  in uart_ioctl()
1305 static void uart_set_ldisc(struct tty_struct *tty)  in uart_set_ldisc()  argument
1307 	struct uart_state *state = tty->driver_data;  in uart_set_ldisc()
1312 		uport->ops->set_ldisc(uport, &tty->termios);  in uart_set_ldisc()
1317 static void uart_set_termios(struct tty_struct *tty,  in uart_set_termios()  argument
1320 	struct uart_state *state = tty->driver_data;  in uart_set_termios()
1322 	unsigned int cflag = tty->termios.c_cflag;  in uart_set_termios()
1333 		   tty->termios.c_cc[VSTART] != old_termios->c_cc[VSTART] ||  in uart_set_termios()
1334 		   tty->termios.c_cc[VSTOP] != old_termios->c_cc[VSTOP];  in uart_set_termios()
1344 	    tty->termios.c_ospeed == old_termios->c_ospeed &&  in uart_set_termios()
1345 	    tty->termios.c_ispeed == old_termios->c_ispeed &&  in uart_set_termios()
1346 	    ((tty->termios.c_iflag ^ old_termios->c_iflag) & iflag_mask) == 0 &&  in uart_set_termios()
1352 	uart_change_speed(tty, state, old_termios);  in uart_set_termios()
1355 	cflag = tty->termios.c_cflag;  in uart_set_termios()
1363 		if (!(cflag & CRTSCTS) || !test_bit(TTY_THROTTLED, &tty->flags))  in uart_set_termios()
1375 static void uart_close(struct tty_struct *tty, struct file *filp)  in uart_close()  argument
1377 	struct uart_state *state = tty->driver_data;  in uart_close()
1382 		struct uart_driver *drv = tty->driver->driver_state;  in uart_close()
1384 		state = drv->state + tty->index;  in uart_close()
1397 	if (!port->count || tty_port_close_start(port, tty, filp) == 0)  in uart_close()
1413 		uart_wait_until_sent(tty, uport->timeout);  in uart_close()
1417 	uart_shutdown(tty, state);  in uart_close()
1443 	tty_ldisc_flush(tty);  in uart_close()
1444 	tty->closing = 0;  in uart_close()
1447 static void uart_wait_until_sent(struct tty_struct *tty, int timeout)  in uart_wait_until_sent()  argument
1449 	struct uart_state *state = tty->driver_data;  in uart_wait_until_sent()
1507 static void uart_hangup(struct tty_struct *tty)  in uart_hangup()  argument
1509 	struct uart_state *state = tty->driver_data;  in uart_hangup()
1517 		uart_flush_buffer(tty);  in uart_hangup()
1518 		uart_shutdown(tty, state);  in uart_hangup()
1592 static int uart_open(struct tty_struct *tty, struct file *filp)  in uart_open()  argument
1594 	struct uart_driver *drv = (struct uart_driver *)tty->driver->driver_state;  in uart_open()
1595 	int retval, line = tty->index;  in uart_open()
1622 	tty->driver_data = state;  in uart_open()
1626 	tty_port_tty_set(port, tty);  in uart_open()
1631 	retval = uart_startup(tty, state, 0);  in uart_open()
1638 		retval = tty_port_block_til_ready(port, tty, filp);  in uart_open()
2127 		if (port->tty && termios.c_cflag == 0)  in uart_resume_port()
2128 			termios = port->tty->termios;  in uart_resume_port()
2147 			struct tty_struct *tty = port->tty;  in uart_resume_port()  local
2150 				if (tty)  in uart_resume_port()
2151 					uart_change_speed(tty, state, NULL);  in uart_resume_port()
2163 				uart_shutdown(tty, state);  in uart_resume_port()
2759 	struct tty_struct *tty;  in uart_remove_one_port()  local
2788 	tty = tty_port_tty_get(port);  in uart_remove_one_port()
2789 	if (tty) {  in uart_remove_one_port()
2790 		tty_vhangup(port->tty);  in uart_remove_one_port()
2791 		tty_kref_put(tty);  in uart_remove_one_port()
2854 	struct tty_struct *tty = port->tty;  in uart_handle_dcd_change()  local
2859 	if (tty) {  in uart_handle_dcd_change()
2860 		ld = tty_ldisc_ref(tty);  in uart_handle_dcd_change()
2863 				ld->ops->dcd_change(tty, status);  in uart_handle_dcd_change()
2873 		else if (tty)  in uart_handle_dcd_change()
2874 			tty_hangup(tty);  in uart_handle_dcd_change()