62 static int uart_dcd_enabled(struct uart_port *uport)  in uart_dcd_enabled()  argument
64 	return !!(uport->status & UPSTAT_DCD_ENABLE);  in uart_dcd_enabled()
137 	struct uart_port *uport = state->uart_port;  in uart_port_startup()  local
141 	if (uport->type == PORT_UNKNOWN)  in uart_port_startup()
163 	retval = uport->ops->startup(uport);  in uart_port_startup()
165 		if (uart_console(uport) && uport->cons->cflag) {  in uart_port_startup()
166 			tty->termios.c_cflag = uport->cons->cflag;  in uart_port_startup()
167 			uport->cons->cflag = 0;  in uart_port_startup()
180 				uart_set_mctrl(uport, TIOCM_RTS | TIOCM_DTR);  in uart_port_startup()
227 	struct uart_port *uport = state->uart_port;  in uart_shutdown()  local
240 		if (uart_console(uport) && tty)  in uart_shutdown()
241 			uport->cons->cflag = tty->termios.c_cflag;  in uart_shutdown()
244 			uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS);  in uart_shutdown()
446 	struct uart_port *uport = state->uart_port;  in uart_change_speed()  local
454 	if (!tty || uport->type == PORT_UNKNOWN)  in uart_change_speed()
458 	uport->ops->set_termios(uport, termios, old_termios);  in uart_change_speed()
463 	spin_lock_irq(&uport->lock);  in uart_change_speed()
465 		uport->status |= UPSTAT_CTS_ENABLE;  in uart_change_speed()
467 		uport->status &= ~UPSTAT_CTS_ENABLE;  in uart_change_speed()
470 		uport->status &= ~UPSTAT_DCD_ENABLE;  in uart_change_speed()
472 		uport->status |= UPSTAT_DCD_ENABLE;  in uart_change_speed()
475 	hw_stopped = uport->hw_stopped;  in uart_change_speed()
476 	uport->hw_stopped = uart_softcts_mode(uport) &&  in uart_change_speed()
477 				!(uport->ops->get_mctrl(uport) & TIOCM_CTS);  in uart_change_speed()
478 	if (uport->hw_stopped) {  in uart_change_speed()
480 			uport->ops->stop_tx(uport);  in uart_change_speed()
485 	spin_unlock_irq(&uport->lock);  in uart_change_speed()
684 	struct uart_port *uport = state->uart_port;  in do_uart_get_info()  local
688 	retinfo->type	    = uport->type;  in do_uart_get_info()
689 	retinfo->line	    = uport->line;  in do_uart_get_info()
690 	retinfo->port	    = uport->iobase;  in do_uart_get_info()
692 		retinfo->port_high = (long) uport->iobase >> HIGH_BITS_OFFSET;  in do_uart_get_info()
693 	retinfo->irq		    = uport->irq;  in do_uart_get_info()
694 	retinfo->flags	    = uport->flags;  in do_uart_get_info()
695 	retinfo->xmit_fifo_size  = uport->fifosize;  in do_uart_get_info()
696 	retinfo->baud_base	    = uport->uartclk / 16;  in do_uart_get_info()
701 	retinfo->custom_divisor  = uport->custom_divisor;  in do_uart_get_info()
702 	retinfo->hub6	    = uport->hub6;  in do_uart_get_info()
703 	retinfo->io_type         = uport->iotype;  in do_uart_get_info()
704 	retinfo->iomem_reg_shift = uport->regshift;  in do_uart_get_info()
705 	retinfo->iomem_base      = (void *)(unsigned long)uport->mapbase;  in do_uart_get_info()
733 	struct uart_port *uport = state->uart_port;  in uart_set_info()  local
751 	change_irq  = !(uport->flags & UPF_FIXED_PORT)  in uart_set_info()
752 		&& new_info->irq != uport->irq;  in uart_set_info()
759 	change_port = !(uport->flags & UPF_FIXED_PORT)  in uart_set_info()
760 		&& (new_port != uport->iobase ||  in uart_set_info()
761 		    (unsigned long)new_info->iomem_base != uport->mapbase ||  in uart_set_info()
762 		    new_info->hub6 != uport->hub6 ||  in uart_set_info()
763 		    new_info->io_type != uport->iotype ||  in uart_set_info()
764 		    new_info->iomem_reg_shift != uport->regshift ||  in uart_set_info()
765 		    new_info->type != uport->type);  in uart_set_info()
767 	old_flags = uport->flags;  in uart_set_info()
769 	old_custom_divisor = uport->custom_divisor;  in uart_set_info()
774 		    (new_info->baud_base != uport->uartclk / 16) ||  in uart_set_info()
778 		     new_info->xmit_fifo_size != uport->fifosize) ||  in uart_set_info()
781 		uport->flags = ((uport->flags & ~UPF_USR_MASK) |  in uart_set_info()
783 		uport->custom_divisor = new_info->custom_divisor;  in uart_set_info()
790 	if (uport->ops->verify_port)  in uart_set_info()
791 		retval = uport->ops->verify_port(uport, new_info);  in uart_set_info()
820 		old_iobase = uport->iobase;  in uart_set_info()
821 		old_mapbase = uport->mapbase;  in uart_set_info()
822 		old_type = uport->type;  in uart_set_info()
823 		old_hub6 = uport->hub6;  in uart_set_info()
824 		old_iotype = uport->iotype;  in uart_set_info()
825 		old_shift = uport->regshift;  in uart_set_info()
831 			uport->ops->release_port(uport);  in uart_set_info()
833 		uport->iobase = new_port;  in uart_set_info()
834 		uport->type = new_info->type;  in uart_set_info()
835 		uport->hub6 = new_info->hub6;  in uart_set_info()
836 		uport->iotype = new_info->io_type;  in uart_set_info()
837 		uport->regshift = new_info->iomem_reg_shift;  in uart_set_info()
838 		uport->mapbase = (unsigned long)new_info->iomem_base;  in uart_set_info()
843 		if (uport->type != PORT_UNKNOWN) {  in uart_set_info()
844 			retval = uport->ops->request_port(uport);  in uart_set_info()
855 			uport->iobase = old_iobase;  in uart_set_info()
856 			uport->type = old_type;  in uart_set_info()
857 			uport->hub6 = old_hub6;  in uart_set_info()
858 			uport->iotype = old_iotype;  in uart_set_info()
859 			uport->regshift = old_shift;  in uart_set_info()
860 			uport->mapbase = old_mapbase;  in uart_set_info()
863 				retval = uport->ops->request_port(uport);  in uart_set_info()
869 					uport->type = PORT_UNKNOWN;  in uart_set_info()
883 		uport->irq      = new_info->irq;  in uart_set_info()
884 	if (!(uport->flags & UPF_FIXED_PORT))  in uart_set_info()
885 		uport->uartclk  = new_info->baud_base * 16;  in uart_set_info()
886 	uport->flags            = (uport->flags & ~UPF_CHANGE_MASK) |  in uart_set_info()
888 	uport->custom_divisor   = new_info->custom_divisor;  in uart_set_info()
892 		uport->fifosize = new_info->xmit_fifo_size;  in uart_set_info()
893 	port->low_latency = (uport->flags & UPF_LOW_LATENCY) ? 1 : 0;  in uart_set_info()
897 	if (uport->type == PORT_UNKNOWN)  in uart_set_info()
900 		if (((old_flags ^ uport->flags) & UPF_SPD_MASK) ||  in uart_set_info()
901 		    old_custom_divisor != uport->custom_divisor) {  in uart_set_info()
907 			if (uport->flags & UPF_SPD_MASK) {  in uart_set_info()
908 				dev_notice(uport->dev,  in uart_set_info()
955 	struct uart_port *uport = state->uart_port;  in uart_get_lsr_info()  local
958 	result = uport->ops->tx_empty(uport);  in uart_get_lsr_info()
966 	if (uport->x_char ||  in uart_get_lsr_info()
968 	     !uart_tx_stopped(uport)))  in uart_get_lsr_info()
978 	struct uart_port *uport = state->uart_port;  in uart_tiocmget()  local
983 		result = uport->mctrl;  in uart_tiocmget()
984 		spin_lock_irq(&uport->lock);  in uart_tiocmget()
985 		result |= uport->ops->get_mctrl(uport);  in uart_tiocmget()
986 		spin_unlock_irq(&uport->lock);  in uart_tiocmget()
997 	struct uart_port *uport = state->uart_port;  in uart_tiocmset()  local
1003 		uart_update_mctrl(uport, set, clear);  in uart_tiocmset()
1014 	struct uart_port *uport = state->uart_port;  in uart_break_ctl()  local
1018 	if (uport->type != PORT_UNKNOWN)  in uart_break_ctl()
1019 		uport->ops->break_ctl(uport, break_state);  in uart_break_ctl()
1027 	struct uart_port *uport = state->uart_port;  in uart_do_autoconfig()  local
1050 		if (uport->type != PORT_UNKNOWN)  in uart_do_autoconfig()
1051 			uport->ops->release_port(uport);  in uart_do_autoconfig()
1054 		if (uport->flags & UPF_AUTO_IRQ)  in uart_do_autoconfig()
1061 		uport->ops->config_port(uport, flags);  in uart_do_autoconfig()
1069 static void uart_enable_ms(struct uart_port *uport)  in uart_enable_ms()  argument
1074 	if (uport->ops->enable_ms)  in uart_enable_ms()
1075 		uport->ops->enable_ms(uport);  in uart_enable_ms()
1090 	struct uart_port *uport = state->uart_port;  in uart_wait_modem_status()  local
1099 	spin_lock_irq(&uport->lock);  in uart_wait_modem_status()
1100 	memcpy(&cprev, &uport->icount, sizeof(struct uart_icount));  in uart_wait_modem_status()
1101 	uart_enable_ms(uport);  in uart_wait_modem_status()
1102 	spin_unlock_irq(&uport->lock);  in uart_wait_modem_status()
1106 		spin_lock_irq(&uport->lock);  in uart_wait_modem_status()
1107 		memcpy(&cnow, &uport->icount, sizeof(struct uart_icount));  in uart_wait_modem_status()
1108 		spin_unlock_irq(&uport->lock);  in uart_wait_modem_status()
1147 	struct uart_port *uport = state->uart_port;  in uart_get_icount()  local
1149 	spin_lock_irq(&uport->lock);  in uart_get_icount()
1150 	memcpy(&cnow, &uport->icount, sizeof(struct uart_icount));  in uart_get_icount()
1151 	spin_unlock_irq(&uport->lock);  in uart_get_icount()
1293 		struct uart_port *uport = state->uart_port;  in uart_ioctl()  local
1294 		if (uport->ops->ioctl)  in uart_ioctl()
1295 			ret = uport->ops->ioctl(uport, cmd, arg);  in uart_ioctl()
1308 	struct uart_port *uport = state->uart_port;  in uart_set_ldisc()  local
1310 	if (uport->ops->set_ldisc) {  in uart_set_ldisc()
1312 		uport->ops->set_ldisc(uport, &tty->termios);  in uart_set_ldisc()
1321 	struct uart_port *uport = state->uart_port;  in uart_set_termios()  local
1330 	if (uport->flags & UPF_SOFT_FLOW) {  in uart_set_termios()
1359 		uart_clear_mctrl(uport, TIOCM_RTS | TIOCM_DTR);  in uart_set_termios()
1365 		uart_set_mctrl(uport, mask);  in uart_set_termios()
1379 	struct uart_port *uport;  in uart_close()  local
1392 	uport = state->uart_port;  in uart_close()
1395 	pr_debug("uart_close(%d) called\n", uport ? uport->line : -1);  in uart_close()
1405 		spin_lock_irq(&uport->lock);  in uart_close()
1406 		uport->ops->stop_rx(uport);  in uart_close()
1407 		spin_unlock_irq(&uport->lock);  in uart_close()
1413 		uart_wait_until_sent(tty, uport->timeout);  in uart_close()
1427 	} else if (!uart_console(uport)) {  in uart_close()
1535 	struct uart_port *uport = state->uart_port;  in uart_port_shutdown()  local
1549 	uport->ops->shutdown(uport);  in uart_port_shutdown()
1554 	synchronize_irq(uport->irq);  in uart_port_shutdown()
1560 	struct uart_port *uport = state->uart_port;  in uart_carrier_raised()  local
1562 	spin_lock_irq(&uport->lock);  in uart_carrier_raised()
1563 	uart_enable_ms(uport);  in uart_carrier_raised()
1564 	mctrl = uport->ops->get_mctrl(uport);  in uart_carrier_raised()
1565 	spin_unlock_irq(&uport->lock);  in uart_carrier_raised()
1574 	struct uart_port *uport = state->uart_port;  in uart_dtr_rts()  local
1577 		uart_set_mctrl(uport, TIOCM_DTR | TIOCM_RTS);  in uart_dtr_rts()
1579 		uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS);  in uart_dtr_rts()
1667 	struct uart_port *uport = state->uart_port;  in uart_line_info()  local
1672 	if (!uport)  in uart_line_info()
1675 	mmio = uport->iotype >= UPIO_MEM;  in uart_line_info()
1677 			uport->line, uart_type(uport),  in uart_line_info()
1679 			mmio ? (unsigned long long)uport->mapbase  in uart_line_info()
1680 			     : (unsigned long long)uport->iobase,  in uart_line_info()
1681 			uport->irq);  in uart_line_info()
1683 	if (uport->type == PORT_UNKNOWN) {  in uart_line_info()
1693 		spin_lock_irq(&uport->lock);  in uart_line_info()
1694 		status = uport->ops->get_mctrl(uport);  in uart_line_info()
1695 		spin_unlock_irq(&uport->lock);  in uart_line_info()
1701 				uport->icount.tx, uport->icount.rx);  in uart_line_info()
1702 		if (uport->icount.frame)  in uart_line_info()
1704 				uport->icount.frame);  in uart_line_info()
1705 		if (uport->icount.parity)  in uart_line_info()
1707 				uport->icount.parity);  in uart_line_info()
1708 		if (uport->icount.brk)  in uart_line_info()
1710 				uport->icount.brk);  in uart_line_info()
1711 		if (uport->icount.overrun)  in uart_line_info()
1713 				uport->icount.overrun);  in uart_line_info()
1716 	if (uport->mctrl & (bit)) \  in uart_line_info()
2027 int uart_suspend_port(struct uart_driver *drv, struct uart_port *uport)  in uart_suspend_port()  argument
2029 	struct uart_state *state = drv->state + uport->line;  in uart_suspend_port()
2032 	struct uart_match match = {uport, drv};  in uart_suspend_port()
2036 	tty_dev = device_find_child(uport->dev, &match, serial_match_port);  in uart_suspend_port()
2038 		if (!enable_irq_wake(uport->irq))  in uart_suspend_port()
2039 			uport->irq_wake = 1;  in uart_suspend_port()
2047 	if (!console_suspend_enabled && uart_console(uport))  in uart_suspend_port()
2050 	uport->suspended = 1;  in uart_suspend_port()
2053 		const struct uart_ops *ops = uport->ops;  in uart_suspend_port()
2059 		spin_lock_irq(&uport->lock);  in uart_suspend_port()
2060 		ops->stop_tx(uport);  in uart_suspend_port()
2061 		ops->set_mctrl(uport, 0);  in uart_suspend_port()
2062 		ops->stop_rx(uport);  in uart_suspend_port()
2063 		spin_unlock_irq(&uport->lock);  in uart_suspend_port()
2068 		for (tries = 3; !ops->tx_empty(uport) && tries; tries--)  in uart_suspend_port()
2071 			dev_err(uport->dev, "%s%d: Unable to drain transmitter\n",  in uart_suspend_port()
2073 				drv->tty_driver->name_base + uport->line);  in uart_suspend_port()
2075 		ops->shutdown(uport);  in uart_suspend_port()
2081 	if (uart_console(uport))  in uart_suspend_port()
2082 		console_stop(uport->cons);  in uart_suspend_port()
2091 int uart_resume_port(struct uart_driver *drv, struct uart_port *uport)  in uart_resume_port()  argument
2093 	struct uart_state *state = drv->state + uport->line;  in uart_resume_port()
2096 	struct uart_match match = {uport, drv};  in uart_resume_port()
2101 	tty_dev = device_find_child(uport->dev, &match, serial_match_port);  in uart_resume_port()
2102 	if (!uport->suspended && device_may_wakeup(tty_dev)) {  in uart_resume_port()
2103 		if (uport->irq_wake) {  in uart_resume_port()
2104 			disable_irq_wake(uport->irq);  in uart_resume_port()
2105 			uport->irq_wake = 0;  in uart_resume_port()
2112 	uport->suspended = 0;  in uart_resume_port()
2117 	if (uart_console(uport)) {  in uart_resume_port()
2122 		termios.c_cflag = uport->cons->cflag;  in uart_resume_port()
2132 		uport->ops->set_termios(uport, &termios, NULL);  in uart_resume_port()
2134 			console_start(uport->cons);  in uart_resume_port()
2138 		const struct uart_ops *ops = uport->ops;  in uart_resume_port()
2142 		spin_lock_irq(&uport->lock);  in uart_resume_port()
2143 		ops->set_mctrl(uport, 0);  in uart_resume_port()
2144 		spin_unlock_irq(&uport->lock);  in uart_resume_port()
2145 		if (console_suspend_enabled || !uart_console(uport)) {  in uart_resume_port()
2148 			ret = ops->startup(uport);  in uart_resume_port()
2152 				spin_lock_irq(&uport->lock);  in uart_resume_port()
2153 				ops->set_mctrl(uport, uport->mctrl);  in uart_resume_port()
2154 				ops->start_tx(uport);  in uart_resume_port()
2155 				spin_unlock_irq(&uport->lock);  in uart_resume_port()
2663 int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)  in uart_add_one_port()  argument
2673 	if (uport->line >= drv->nr)  in uart_add_one_port()
2676 	state = drv->state + uport->line;  in uart_add_one_port()
2687 	state->uart_port = uport;  in uart_add_one_port()
2688 	uport->state = state;  in uart_add_one_port()
2691 	uport->cons = drv->cons;  in uart_add_one_port()
2692 	uport->minor = drv->tty_driver->minor_start + uport->line;  in uart_add_one_port()
2698 	if (!(uart_console(uport) && (uport->cons->flags & CON_ENABLED))) {  in uart_add_one_port()
2699 		spin_lock_init(&uport->lock);  in uart_add_one_port()
2700 		lockdep_set_class(&uport->lock, &port_lock_key);  in uart_add_one_port()
2702 	if (uport->cons && uport->dev)  in uart_add_one_port()
2703 		of_console_check(uport->dev->of_node, uport->cons->name, uport->line);  in uart_add_one_port()
2705 	uart_configure_port(drv, state, uport);  in uart_add_one_port()
2708 	if (uport->attr_group)  in uart_add_one_port()
2711 	uport->tty_groups = kcalloc(num_groups, sizeof(*uport->tty_groups),  in uart_add_one_port()
2713 	if (!uport->tty_groups) {  in uart_add_one_port()
2717 	uport->tty_groups[0] = &tty_dev_attr_group;  in uart_add_one_port()
2718 	if (uport->attr_group)  in uart_add_one_port()
2719 		uport->tty_groups[1] = uport->attr_group;  in uart_add_one_port()
2726 			uport->line, uport->dev, port, uport->tty_groups);  in uart_add_one_port()
2730 		dev_err(uport->dev, "Cannot register tty device on line %d\n",  in uart_add_one_port()
2731 		       uport->line);  in uart_add_one_port()
2737 	uport->flags &= ~UPF_DEAD;  in uart_add_one_port()
2755 int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)  in uart_remove_one_port()  argument
2757 	struct uart_state *state = drv->state + uport->line;  in uart_remove_one_port()
2764 	if (state->uart_port != uport)  in uart_remove_one_port()
2765 		dev_alert(uport->dev, "Removing wrong port: %p != %p\n",  in uart_remove_one_port()
2766 			state->uart_port, uport);  in uart_remove_one_port()
2780 	uport->flags |= UPF_DEAD;  in uart_remove_one_port()
2786 	tty_unregister_device(drv->tty_driver, uport->line);  in uart_remove_one_port()
2797 	if (uart_console(uport))  in uart_remove_one_port()
2798 		unregister_console(uport->cons);  in uart_remove_one_port()
2803 	if (uport->type != PORT_UNKNOWN)  in uart_remove_one_port()
2804 		uport->ops->release_port(uport);  in uart_remove_one_port()
2805 	kfree(uport->tty_groups);  in uart_remove_one_port()
2810 	uport->type = PORT_UNKNOWN;  in uart_remove_one_port()
2851 void uart_handle_dcd_change(struct uart_port *uport, unsigned int status)  in uart_handle_dcd_change()  argument
2853 	struct tty_port *port = &uport->state->port;  in uart_handle_dcd_change()
2857 	lockdep_assert_held_once(&uport->lock);  in uart_handle_dcd_change()
2868 	uport->icount.dcd++;  in uart_handle_dcd_change()
2870 	if (uart_dcd_enabled(uport)) {  in uart_handle_dcd_change()
2886 void uart_handle_cts_change(struct uart_port *uport, unsigned int status)  in uart_handle_cts_change()  argument
2888 	lockdep_assert_held_once(&uport->lock);  in uart_handle_cts_change()
2890 	uport->icount.cts++;  in uart_handle_cts_change()
2892 	if (uart_softcts_mode(uport)) {  in uart_handle_cts_change()
2893 		if (uport->hw_stopped) {  in uart_handle_cts_change()
2895 				uport->hw_stopped = 0;  in uart_handle_cts_change()
2896 				uport->ops->start_tx(uport);  in uart_handle_cts_change()
2897 				uart_write_wakeup(uport);  in uart_handle_cts_change()
2901 				uport->hw_stopped = 1;  in uart_handle_cts_change()
2902 				uport->ops->stop_tx(uport);  in uart_handle_cts_change()