54 static void uart_change_speed(struct tty_struct *tty, struct uart_state *state,
57 static void uart_change_pm(struct uart_state *state,
73 	struct uart_state *state = port->state;  in uart_write_wakeup()  local
78 	BUG_ON(!state);  in uart_write_wakeup()
79 	tty_wakeup(state->port.tty);  in uart_write_wakeup()
84 	struct uart_state *state = tty->driver_data;  in uart_stop()  local
85 	struct uart_port *port = state->uart_port;  in uart_stop()
95 	struct uart_state *state = tty->driver_data;  in __uart_start()  local
96 	struct uart_port *port = state->uart_port;  in __uart_start()
104 	struct uart_state *state = tty->driver_data;  in uart_start()  local
105 	struct uart_port *port = state->uart_port;  in uart_start()
134 static int uart_port_startup(struct tty_struct *tty, struct uart_state *state,  in uart_port_startup()  argument
137 	struct uart_port *uport = state->uart_port;  in uart_port_startup()
147 	uart_change_pm(state, UART_PM_STATE_ON);  in uart_port_startup()
153 	if (!state->xmit.buf) {  in uart_port_startup()
159 		state->xmit.buf = (unsigned char *) page;  in uart_port_startup()
160 		uart_circ_clear(&state->xmit);  in uart_port_startup()
172 		uart_change_speed(tty, state, NULL);  in uart_port_startup()
195 static int uart_startup(struct tty_struct *tty, struct uart_state *state,  in uart_startup()  argument
198 	struct tty_port *port = &state->port;  in uart_startup()
210 	retval = uart_port_startup(tty, state, init_hw);  in uart_startup()
225 static void uart_shutdown(struct tty_struct *tty, struct uart_state *state)  in uart_shutdown()  argument
227 	struct uart_port *uport = state->uart_port;  in uart_shutdown()
228 	struct tty_port *port = &state->port;  in uart_shutdown()
259 	if (state->xmit.buf) {  in uart_shutdown()
260 		free_page((unsigned long)state->xmit.buf);  in uart_shutdown()
261 		state->xmit.buf = NULL;  in uart_shutdown()
443 static void uart_change_speed(struct tty_struct *tty, struct uart_state *state,  in uart_change_speed()  argument
446 	struct uart_port *uport = state->uart_port;  in uart_change_speed()
509 	struct uart_state *state = tty->driver_data;  in uart_put_char()  local
511 	return __uart_put_char(state->uart_port, &state->xmit, ch);  in uart_put_char()
522 	struct uart_state *state = tty->driver_data;  in uart_write()  local
532 	if (!state) {  in uart_write()
537 	port = state->uart_port;  in uart_write()
538 	circ = &state->xmit;  in uart_write()
565 	struct uart_state *state = tty->driver_data;  in uart_write_room()  local
569 	spin_lock_irqsave(&state->uart_port->lock, flags);  in uart_write_room()
570 	ret = uart_circ_chars_free(&state->xmit);  in uart_write_room()
571 	spin_unlock_irqrestore(&state->uart_port->lock, flags);  in uart_write_room()
577 	struct uart_state *state = tty->driver_data;  in uart_chars_in_buffer()  local
581 	spin_lock_irqsave(&state->uart_port->lock, flags);  in uart_chars_in_buffer()
582 	ret = uart_circ_chars_pending(&state->xmit);  in uart_chars_in_buffer()
583 	spin_unlock_irqrestore(&state->uart_port->lock, flags);  in uart_chars_in_buffer()
589 	struct uart_state *state = tty->driver_data;  in uart_flush_buffer()  local
597 	if (!state) {  in uart_flush_buffer()
602 	port = state->uart_port;  in uart_flush_buffer()
606 	uart_circ_clear(&state->xmit);  in uart_flush_buffer()
619 	struct uart_state *state = tty->driver_data;  in uart_send_xchar()  local
620 	struct uart_port *port = state->uart_port;  in uart_send_xchar()
636 	struct uart_state *state = tty->driver_data;  in uart_throttle()  local
637 	struct uart_port *port = state->uart_port;  in uart_throttle()
659 	struct uart_state *state = tty->driver_data;  in uart_unthrottle()  local
660 	struct uart_port *port = state->uart_port;  in uart_unthrottle()
683 	struct uart_state *state = container_of(port, struct uart_state, port);  in do_uart_get_info()  local
684 	struct uart_port *uport = state->uart_port;  in do_uart_get_info()
730 			 struct uart_state *state,  in uart_set_info()  argument
733 	struct uart_port *uport = state->uart_port;  in uart_set_info()
813 		uart_shutdown(tty, state);  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
925 	struct tty_port *port = &state->port;  in uart_set_info_user()
939 	retval = uart_set_info(tty, port, state, &new_serial);  in uart_set_info_user()
953 			struct uart_state *state, unsigned int __user *value)  in uart_get_lsr_info()  argument
955 	struct uart_port *uport = state->uart_port;  in uart_get_lsr_info()
967 	    ((uart_circ_chars_pending(&state->xmit) > 0) &&  in uart_get_lsr_info()
976 	struct uart_state *state = tty->driver_data;  in uart_tiocmget()  local
977 	struct tty_port *port = &state->port;  in uart_tiocmget()
978 	struct uart_port *uport = state->uart_port;  in uart_tiocmget()
996 	struct uart_state *state = tty->driver_data;  in uart_tiocmset()  local
997 	struct uart_port *uport = state->uart_port;  in uart_tiocmset()
998 	struct tty_port *port = &state->port;  in uart_tiocmset()
1012 	struct uart_state *state = tty->driver_data;  in uart_break_ctl()  local
1013 	struct tty_port *port = &state->port;  in uart_break_ctl()
1014 	struct uart_port *uport = state->uart_port;  in uart_break_ctl()
1025 static int uart_do_autoconfig(struct tty_struct *tty,struct uart_state *state)  in uart_do_autoconfig()  argument
1027 	struct uart_port *uport = state->uart_port;  in uart_do_autoconfig()
1028 	struct tty_port *port = &state->port;  in uart_do_autoconfig()
1044 		uart_shutdown(tty, state);  in uart_do_autoconfig()
1063 		ret = uart_startup(tty, state, 1);  in uart_do_autoconfig()
1088 uart_wait_modem_status(struct uart_state *state, unsigned long arg)  in uart_wait_modem_status()  argument
1090 	struct uart_port *uport = state->uart_port;  in uart_wait_modem_status()
1091 	struct tty_port *port = &state->port;  in uart_wait_modem_status()
1145 	struct uart_state *state = tty->driver_data;  in uart_get_icount()  local
1147 	struct uart_port *uport = state->uart_port;  in uart_get_icount()
1216 	struct uart_state *state = tty->driver_data;  in uart_ioctl()  local
1217 	struct tty_port *port = &state->port;  in uart_ioctl()
1232 		ret = uart_set_info_user(tty, state, uarg);  in uart_ioctl()
1238 		ret = uart_do_autoconfig(tty, state);  in uart_ioctl()
1261 		ret = uart_wait_modem_status(state, arg);  in uart_ioctl()
1282 		ret = uart_get_lsr_info(tty, state, uarg);  in uart_ioctl()
1286 		ret = uart_get_rs485_config(state->uart_port, uarg);  in uart_ioctl()
1290 		ret = uart_set_rs485_config(state->uart_port, uarg);  in uart_ioctl()
1293 		struct uart_port *uport = state->uart_port;  in uart_ioctl()
1307 	struct uart_state *state = tty->driver_data;  in uart_set_ldisc()  local
1308 	struct uart_port *uport = state->uart_port;  in uart_set_ldisc()
1311 		mutex_lock(&state->port.mutex);  in uart_set_ldisc()
1313 		mutex_unlock(&state->port.mutex);  in uart_set_ldisc()
1320 	struct uart_state *state = tty->driver_data;  in uart_set_termios()  local
1321 	struct uart_port *uport = state->uart_port;  in uart_set_termios()
1351 	mutex_lock(&state->port.mutex);  in uart_set_termios()
1352 	uart_change_speed(tty, state, old_termios);  in uart_set_termios()
1353 	mutex_unlock(&state->port.mutex);  in uart_set_termios()
1377 	struct uart_state *state = tty->driver_data;  in uart_close()  local
1381 	if (!state) {  in uart_close()
1384 		state = drv->state + tty->index;  in uart_close()
1385 		port = &state->port;  in uart_close()
1392 	uport = state->uart_port;  in uart_close()
1393 	port = &state->port;  in uart_close()
1417 	uart_shutdown(tty, state);  in uart_close()
1429 		uart_change_pm(state, UART_PM_STATE_OFF);  in uart_close()
1449 	struct uart_state *state = tty->driver_data;  in uart_wait_until_sent()  local
1450 	struct uart_port *port = state->uart_port;  in uart_wait_until_sent()
1509 	struct uart_state *state = tty->driver_data;  in uart_hangup()  local
1510 	struct tty_port *port = &state->port;  in uart_hangup()
1513 	pr_debug("uart_hangup(%d)\n", state->uart_port->line);  in uart_hangup()
1518 		uart_shutdown(tty, state);  in uart_hangup()
1524 		if (!uart_console(state->uart_port))  in uart_hangup()
1525 			uart_change_pm(state, UART_PM_STATE_OFF);  in uart_hangup()
1534 	struct uart_state *state = container_of(port, struct uart_state, port);  in uart_port_shutdown()  local
1535 	struct uart_port *uport = state->uart_port;  in uart_port_shutdown()
1559 	struct uart_state *state = container_of(port, struct uart_state, port);  in uart_carrier_raised()  local
1560 	struct uart_port *uport = state->uart_port;  in uart_carrier_raised()
1573 	struct uart_state *state = container_of(port, struct uart_state, port);  in uart_dtr_rts()  local
1574 	struct uart_port *uport = state->uart_port;  in uart_dtr_rts()
1596 	struct uart_state *state = drv->state + line;  in uart_open()  local
1597 	struct tty_port *port = &state->port;  in uart_open()
1617 	if (!state->uart_port || state->uart_port->flags & UPF_DEAD) {  in uart_open()
1622 	tty->driver_data = state;  in uart_open()
1623 	state->uart_port->state = state;  in uart_open()
1624 	state->port.low_latency =  in uart_open()
1625 		(state->uart_port->flags & UPF_LOW_LATENCY) ? 1 : 0;  in uart_open()
1631 	retval = uart_startup(tty, state, 0);  in uart_open()
1664 	struct uart_state *state = drv->state + i;  in uart_line_info()  local
1665 	struct tty_port *port = &state->port;  in uart_line_info()
1667 	struct uart_port *uport = state->uart_port;  in uart_line_info()
1690 		pm_state = state->pm_state;  in uart_line_info()
1692 			uart_change_pm(state, UART_PM_STATE_ON);  in uart_line_info()
1697 			uart_change_pm(state, pm_state);  in uart_line_info()
2000 static void uart_change_pm(struct uart_state *state,  in uart_change_pm()  argument
2003 	struct uart_port *port = state->uart_port;  in uart_change_pm()
2005 	if (state->pm_state != pm_state) {  in uart_change_pm()
2007 			port->ops->pm(port, pm_state, state->pm_state);  in uart_change_pm()
2008 		state->pm_state = pm_state;  in uart_change_pm()
2029 	struct uart_state *state = drv->state + uport->line;  in uart_suspend_port()  local
2030 	struct tty_port *port = &state->port;  in uart_suspend_port()
2084 	uart_change_pm(state, UART_PM_STATE_OFF);  in uart_suspend_port()
2093 	struct uart_state *state = drv->state + uport->line;  in uart_resume_port()  local
2094 	struct tty_port *port = &state->port;  in uart_resume_port()
2131 			uart_change_pm(state, UART_PM_STATE_ON);  in uart_resume_port()
2141 		uart_change_pm(state, UART_PM_STATE_ON);  in uart_resume_port()
2151 					uart_change_speed(tty, state, NULL);  in uart_resume_port()
2163 				uart_shutdown(tty, state);  in uart_resume_port()
2210 uart_configure_port(struct uart_driver *drv, struct uart_state *state,  in uart_configure_port()  argument
2242 		uart_change_pm(state, UART_PM_STATE_ON);  in uart_configure_port()
2266 			uart_change_pm(state, UART_PM_STATE_OFF);  in uart_configure_port()
2275 	struct uart_state *state = drv->state + line;  in uart_poll_init()  local
2283 	if (!state || !state->uart_port)  in uart_poll_init()
2286 	port = state->uart_port;  in uart_poll_init()
2291 		struct tty_port *tport = &state->port;  in uart_poll_init()
2317 	struct uart_state *state = drv->state + line;  in uart_poll_get_char()  local
2320 	if (!state || !state->uart_port)  in uart_poll_get_char()
2323 	port = state->uart_port;  in uart_poll_get_char()
2330 	struct uart_state *state = drv->state + line;  in uart_poll_put_char()  local
2333 	if (!state || !state->uart_port)  in uart_poll_put_char()
2336 	port = state->uart_port;  in uart_poll_put_char()
2400 	BUG_ON(drv->state);  in uart_register_driver()
2406 	drv->state = kzalloc(sizeof(struct uart_state) * drv->nr, GFP_KERNEL);  in uart_register_driver()
2407 	if (!drv->state)  in uart_register_driver()
2433 		struct uart_state *state = drv->state + i;  in uart_register_driver()  local
2434 		struct tty_port *port = &state->port;  in uart_register_driver()
2445 		tty_port_destroy(&drv->state[i].port);  in uart_register_driver()
2448 	kfree(drv->state);  in uart_register_driver()
2470 		tty_port_destroy(&drv->state[i].port);  in uart_unregister_driver()
2471 	kfree(drv->state);  in uart_unregister_driver()
2472 	drv->state = NULL;  in uart_unregister_driver()
2665 	struct uart_state *state;  in uart_add_one_port()  local
2676 	state = drv->state + uport->line;  in uart_add_one_port()
2677 	port = &state->port;  in uart_add_one_port()
2681 	if (state->uart_port) {  in uart_add_one_port()
2687 	state->uart_port = uport;  in uart_add_one_port()
2688 	uport->state = state;  in uart_add_one_port()
2690 	state->pm_state = UART_PM_STATE_UNDEFINED;  in uart_add_one_port()
2705 	uart_configure_port(drv, state, uport);  in uart_add_one_port()
2757 	struct uart_state *state = drv->state + uport->line;  in uart_remove_one_port()  local
2758 	struct tty_port *port = &state->port;  in uart_remove_one_port()
2764 	if (state->uart_port != uport)  in uart_remove_one_port()
2766 			state->uart_port, uport);  in uart_remove_one_port()
2775 	if (!state->uart_port) {  in uart_remove_one_port()
2812 	state->uart_port = NULL;  in uart_remove_one_port()
2853 	struct tty_port *port = &uport->state->port;  in uart_handle_dcd_change()
2925 	struct tty_port *tport = &port->state->port;  in uart_insert_char()