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()
435 	struct uart_port *uport = state->uart_port;  in uart_change_speed()  local
443 	if (!tty || uport->type == PORT_UNKNOWN)  in uart_change_speed()
447 	uport->ops->set_termios(uport, termios, old_termios);  in uart_change_speed()
452 	spin_lock_irq(&uport->lock);  in uart_change_speed()
454 		uport->status |= UPSTAT_CTS_ENABLE;  in uart_change_speed()
456 		uport->status &= ~UPSTAT_CTS_ENABLE;  in uart_change_speed()
459 		uport->status &= ~UPSTAT_DCD_ENABLE;  in uart_change_speed()
461 		uport->status |= UPSTAT_DCD_ENABLE;  in uart_change_speed()
464 	hw_stopped = uport->hw_stopped;  in uart_change_speed()
465 	uport->hw_stopped = uart_softcts_mode(uport) &&  in uart_change_speed()
466 				!(uport->ops->get_mctrl(uport) & TIOCM_CTS);  in uart_change_speed()
467 	if (uport->hw_stopped) {  in uart_change_speed()
469 			uport->ops->stop_tx(uport);  in uart_change_speed()
474 	spin_unlock_irq(&uport->lock);  in uart_change_speed()
673 	struct uart_port *uport = state->uart_port;  in do_uart_get_info()  local
677 	retinfo->type	    = uport->type;  in do_uart_get_info()
678 	retinfo->line	    = uport->line;  in do_uart_get_info()
679 	retinfo->port	    = uport->iobase;  in do_uart_get_info()
681 		retinfo->port_high = (long) uport->iobase >> HIGH_BITS_OFFSET;  in do_uart_get_info()
682 	retinfo->irq		    = uport->irq;  in do_uart_get_info()
683 	retinfo->flags	    = uport->flags;  in do_uart_get_info()
684 	retinfo->xmit_fifo_size  = uport->fifosize;  in do_uart_get_info()
685 	retinfo->baud_base	    = uport->uartclk / 16;  in do_uart_get_info()
690 	retinfo->custom_divisor  = uport->custom_divisor;  in do_uart_get_info()
691 	retinfo->hub6	    = uport->hub6;  in do_uart_get_info()
692 	retinfo->io_type         = uport->iotype;  in do_uart_get_info()
693 	retinfo->iomem_reg_shift = uport->regshift;  in do_uart_get_info()
694 	retinfo->iomem_base      = (void *)(unsigned long)uport->mapbase;  in do_uart_get_info()
722 	struct uart_port *uport = state->uart_port;  in uart_set_info()  local
740 	change_irq  = !(uport->flags & UPF_FIXED_PORT)  in uart_set_info()
741 		&& new_info->irq != uport->irq;  in uart_set_info()
748 	change_port = !(uport->flags & UPF_FIXED_PORT)  in uart_set_info()
749 		&& (new_port != uport->iobase ||  in uart_set_info()
750 		    (unsigned long)new_info->iomem_base != uport->mapbase ||  in uart_set_info()
751 		    new_info->hub6 != uport->hub6 ||  in uart_set_info()
752 		    new_info->io_type != uport->iotype ||  in uart_set_info()
753 		    new_info->iomem_reg_shift != uport->regshift ||  in uart_set_info()
754 		    new_info->type != uport->type);  in uart_set_info()
756 	old_flags = uport->flags;  in uart_set_info()
758 	old_custom_divisor = uport->custom_divisor;  in uart_set_info()
763 		    (new_info->baud_base != uport->uartclk / 16) ||  in uart_set_info()
767 		     new_info->xmit_fifo_size != uport->fifosize) ||  in uart_set_info()
770 		uport->flags = ((uport->flags & ~UPF_USR_MASK) |  in uart_set_info()
772 		uport->custom_divisor = new_info->custom_divisor;  in uart_set_info()
779 	if (uport->ops->verify_port)  in uart_set_info()
780 		retval = uport->ops->verify_port(uport, new_info);  in uart_set_info()
809 		old_iobase = uport->iobase;  in uart_set_info()
810 		old_mapbase = uport->mapbase;  in uart_set_info()
811 		old_type = uport->type;  in uart_set_info()
812 		old_hub6 = uport->hub6;  in uart_set_info()
813 		old_iotype = uport->iotype;  in uart_set_info()
814 		old_shift = uport->regshift;  in uart_set_info()
820 			uport->ops->release_port(uport);  in uart_set_info()
822 		uport->iobase = new_port;  in uart_set_info()
823 		uport->type = new_info->type;  in uart_set_info()
824 		uport->hub6 = new_info->hub6;  in uart_set_info()
825 		uport->iotype = new_info->io_type;  in uart_set_info()
826 		uport->regshift = new_info->iomem_reg_shift;  in uart_set_info()
827 		uport->mapbase = (unsigned long)new_info->iomem_base;  in uart_set_info()
832 		if (uport->type != PORT_UNKNOWN) {  in uart_set_info()
833 			retval = uport->ops->request_port(uport);  in uart_set_info()
844 			uport->iobase = old_iobase;  in uart_set_info()
845 			uport->type = old_type;  in uart_set_info()
846 			uport->hub6 = old_hub6;  in uart_set_info()
847 			uport->iotype = old_iotype;  in uart_set_info()
848 			uport->regshift = old_shift;  in uart_set_info()
849 			uport->mapbase = old_mapbase;  in uart_set_info()
852 				retval = uport->ops->request_port(uport);  in uart_set_info()
858 					uport->type = PORT_UNKNOWN;  in uart_set_info()
872 		uport->irq      = new_info->irq;  in uart_set_info()
873 	if (!(uport->flags & UPF_FIXED_PORT))  in uart_set_info()
874 		uport->uartclk  = new_info->baud_base * 16;  in uart_set_info()
875 	uport->flags            = (uport->flags & ~UPF_CHANGE_MASK) |  in uart_set_info()
877 	uport->custom_divisor   = new_info->custom_divisor;  in uart_set_info()
881 		uport->fifosize = new_info->xmit_fifo_size;  in uart_set_info()
882 	port->low_latency = (uport->flags & UPF_LOW_LATENCY) ? 1 : 0;  in uart_set_info()
886 	if (uport->type == PORT_UNKNOWN)  in uart_set_info()
889 		if (((old_flags ^ uport->flags) & UPF_SPD_MASK) ||  in uart_set_info()
890 		    old_custom_divisor != uport->custom_divisor) {  in uart_set_info()
896 			if (uport->flags & UPF_SPD_MASK) {  in uart_set_info()
899 				dev_notice(uport->dev,  in uart_set_info()
946 	struct uart_port *uport = state->uart_port;  in uart_get_lsr_info()  local
949 	result = uport->ops->tx_empty(uport);  in uart_get_lsr_info()
957 	if (uport->x_char ||  in uart_get_lsr_info()
959 	     !uart_tx_stopped(uport)))  in uart_get_lsr_info()
969 	struct uart_port *uport = state->uart_port;  in uart_tiocmget()  local
974 		result = uport->mctrl;  in uart_tiocmget()
975 		spin_lock_irq(&uport->lock);  in uart_tiocmget()
976 		result |= uport->ops->get_mctrl(uport);  in uart_tiocmget()
977 		spin_unlock_irq(&uport->lock);  in uart_tiocmget()
988 	struct uart_port *uport = state->uart_port;  in uart_tiocmset()  local
994 		uart_update_mctrl(uport, set, clear);  in uart_tiocmset()
1005 	struct uart_port *uport = state->uart_port;  in uart_break_ctl()  local
1009 	if (uport->type != PORT_UNKNOWN)  in uart_break_ctl()
1010 		uport->ops->break_ctl(uport, break_state);  in uart_break_ctl()
1018 	struct uart_port *uport = state->uart_port;  in uart_do_autoconfig()  local
1041 		if (uport->type != PORT_UNKNOWN)  in uart_do_autoconfig()
1042 			uport->ops->release_port(uport);  in uart_do_autoconfig()
1045 		if (uport->flags & UPF_AUTO_IRQ)  in uart_do_autoconfig()
1052 		uport->ops->config_port(uport, flags);  in uart_do_autoconfig()
1060 static void uart_enable_ms(struct uart_port *uport)  in uart_enable_ms()  argument
1065 	if (uport->ops->enable_ms)  in uart_enable_ms()
1066 		uport->ops->enable_ms(uport);  in uart_enable_ms()
1081 	struct uart_port *uport = state->uart_port;  in uart_wait_modem_status()  local
1090 	spin_lock_irq(&uport->lock);  in uart_wait_modem_status()
1091 	memcpy(&cprev, &uport->icount, sizeof(struct uart_icount));  in uart_wait_modem_status()
1092 	uart_enable_ms(uport);  in uart_wait_modem_status()
1093 	spin_unlock_irq(&uport->lock);  in uart_wait_modem_status()
1097 		spin_lock_irq(&uport->lock);  in uart_wait_modem_status()
1098 		memcpy(&cnow, &uport->icount, sizeof(struct uart_icount));  in uart_wait_modem_status()
1099 		spin_unlock_irq(&uport->lock);  in uart_wait_modem_status()
1138 	struct uart_port *uport = state->uart_port;  in uart_get_icount()  local
1140 	spin_lock_irq(&uport->lock);  in uart_get_icount()
1141 	memcpy(&cnow, &uport->icount, sizeof(struct uart_icount));  in uart_get_icount()
1142 	spin_unlock_irq(&uport->lock);  in uart_get_icount()
1284 		struct uart_port *uport = state->uart_port;  in uart_ioctl()  local
1285 		if (uport->ops->ioctl)  in uart_ioctl()
1286 			ret = uport->ops->ioctl(uport, cmd, arg);  in uart_ioctl()
1299 	struct uart_port *uport = state->uart_port;  in uart_set_ldisc()  local
1301 	if (uport->ops->set_ldisc) {  in uart_set_ldisc()
1303 		uport->ops->set_ldisc(uport, &tty->termios);  in uart_set_ldisc()
1312 	struct uart_port *uport = state->uart_port;  in uart_set_termios()  local
1321 	if (uport->flags & UPF_SOFT_FLOW) {  in uart_set_termios()
1350 		uart_clear_mctrl(uport, TIOCM_RTS | TIOCM_DTR);  in uart_set_termios()
1356 		uart_set_mctrl(uport, mask);  in uart_set_termios()
1370 	struct uart_port *uport;  in uart_close()  local
1384 	uport = state->uart_port;  in uart_close()
1387 	pr_debug("uart_close(%d) called\n", uport ? uport->line : -1);  in uart_close()
1398 		spin_lock_irqsave(&uport->lock, flags);  in uart_close()
1399 		uport->ops->stop_rx(uport);  in uart_close()
1400 		spin_unlock_irqrestore(&uport->lock, flags);  in uart_close()
1406 		uart_wait_until_sent(tty, uport->timeout);  in uart_close()
1420 	} else if (!uart_console(uport)) {  in uart_close()
1534 	struct uart_port *uport = state->uart_port;  in uart_port_shutdown()  local
1548 	uport->ops->shutdown(uport);  in uart_port_shutdown()
1553 	synchronize_irq(uport->irq);  in uart_port_shutdown()
1559 	struct uart_port *uport = state->uart_port;  in uart_carrier_raised()  local
1561 	spin_lock_irq(&uport->lock);  in uart_carrier_raised()
1562 	uart_enable_ms(uport);  in uart_carrier_raised()
1563 	mctrl = uport->ops->get_mctrl(uport);  in uart_carrier_raised()
1564 	spin_unlock_irq(&uport->lock);  in uart_carrier_raised()
1573 	struct uart_port *uport = state->uart_port;  in uart_dtr_rts()  local
1576 		uart_set_mctrl(uport, TIOCM_DTR | TIOCM_RTS);  in uart_dtr_rts()
1578 		uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS);  in uart_dtr_rts()
1666 	struct uart_port *uport = state->uart_port;  in uart_line_info()  local
1671 	if (!uport)  in uart_line_info()
1674 	mmio = uport->iotype >= UPIO_MEM;  in uart_line_info()
1676 			uport->line, uart_type(uport),  in uart_line_info()
1678 			mmio ? (unsigned long long)uport->mapbase  in uart_line_info()
1679 			     : (unsigned long long)uport->iobase,  in uart_line_info()
1680 			uport->irq);  in uart_line_info()
1682 	if (uport->type == PORT_UNKNOWN) {  in uart_line_info()
1692 		spin_lock_irq(&uport->lock);  in uart_line_info()
1693 		status = uport->ops->get_mctrl(uport);  in uart_line_info()
1694 		spin_unlock_irq(&uport->lock);  in uart_line_info()
1700 				uport->icount.tx, uport->icount.rx);  in uart_line_info()
1701 		if (uport->icount.frame)  in uart_line_info()
1703 				uport->icount.frame);  in uart_line_info()
1704 		if (uport->icount.parity)  in uart_line_info()
1706 				uport->icount.parity);  in uart_line_info()
1707 		if (uport->icount.brk)  in uart_line_info()
1709 				uport->icount.brk);  in uart_line_info()
1710 		if (uport->icount.overrun)  in uart_line_info()
1712 				uport->icount.overrun);  in uart_line_info()
1715 	if (uport->mctrl & (bit)) \  in uart_line_info()
2019 int uart_suspend_port(struct uart_driver *drv, struct uart_port *uport)  in uart_suspend_port()  argument
2021 	struct uart_state *state = drv->state + uport->line;  in uart_suspend_port()
2024 	struct uart_match match = {uport, drv};  in uart_suspend_port()
2028 	tty_dev = device_find_child(uport->dev, &match, serial_match_port);  in uart_suspend_port()
2030 		if (!enable_irq_wake(uport->irq))  in uart_suspend_port()
2031 			uport->irq_wake = 1;  in uart_suspend_port()
2039 	if (!console_suspend_enabled && uart_console(uport))  in uart_suspend_port()
2042 	uport->suspended = 1;  in uart_suspend_port()
2045 		const struct uart_ops *ops = uport->ops;  in uart_suspend_port()
2051 		spin_lock_irq(&uport->lock);  in uart_suspend_port()
2052 		ops->stop_tx(uport);  in uart_suspend_port()
2053 		ops->set_mctrl(uport, 0);  in uart_suspend_port()
2054 		ops->stop_rx(uport);  in uart_suspend_port()
2055 		spin_unlock_irq(&uport->lock);  in uart_suspend_port()
2060 		for (tries = 3; !ops->tx_empty(uport) && tries; tries--)  in uart_suspend_port()
2063 			dev_err(uport->dev, "%s%d: Unable to drain transmitter\n",  in uart_suspend_port()
2065 				drv->tty_driver->name_base + uport->line);  in uart_suspend_port()
2067 		ops->shutdown(uport);  in uart_suspend_port()
2073 	if (uart_console(uport))  in uart_suspend_port()
2074 		console_stop(uport->cons);  in uart_suspend_port()
2083 int uart_resume_port(struct uart_driver *drv, struct uart_port *uport)  in uart_resume_port()  argument
2085 	struct uart_state *state = drv->state + uport->line;  in uart_resume_port()
2088 	struct uart_match match = {uport, drv};  in uart_resume_port()
2093 	tty_dev = device_find_child(uport->dev, &match, serial_match_port);  in uart_resume_port()
2094 	if (!uport->suspended && device_may_wakeup(tty_dev)) {  in uart_resume_port()
2095 		if (uport->irq_wake) {  in uart_resume_port()
2096 			disable_irq_wake(uport->irq);  in uart_resume_port()
2097 			uport->irq_wake = 0;  in uart_resume_port()
2104 	uport->suspended = 0;  in uart_resume_port()
2109 	if (uart_console(uport)) {  in uart_resume_port()
2114 		termios.c_cflag = uport->cons->cflag;  in uart_resume_port()
2124 		uport->ops->set_termios(uport, &termios, NULL);  in uart_resume_port()
2126 			console_start(uport->cons);  in uart_resume_port()
2130 		const struct uart_ops *ops = uport->ops;  in uart_resume_port()
2134 		spin_lock_irq(&uport->lock);  in uart_resume_port()
2135 		ops->set_mctrl(uport, 0);  in uart_resume_port()
2136 		spin_unlock_irq(&uport->lock);  in uart_resume_port()
2137 		if (console_suspend_enabled || !uart_console(uport)) {  in uart_resume_port()
2140 			ret = ops->startup(uport);  in uart_resume_port()
2144 				spin_lock_irq(&uport->lock);  in uart_resume_port()
2145 				ops->set_mctrl(uport, uport->mctrl);  in uart_resume_port()
2146 				ops->start_tx(uport);  in uart_resume_port()
2147 				spin_unlock_irq(&uport->lock);  in uart_resume_port()
2657 int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)  in uart_add_one_port()  argument
2667 	if (uport->line >= drv->nr)  in uart_add_one_port()
2670 	state = drv->state + uport->line;  in uart_add_one_port()
2681 	state->uart_port = uport;  in uart_add_one_port()
2682 	uport->state = state;  in uart_add_one_port()
2685 	uport->cons = drv->cons;  in uart_add_one_port()
2686 	uport->minor = drv->tty_driver->minor_start + uport->line;  in uart_add_one_port()
2692 	if (!(uart_console(uport) && (uport->cons->flags & CON_ENABLED))) {  in uart_add_one_port()
2693 		spin_lock_init(&uport->lock);  in uart_add_one_port()
2694 		lockdep_set_class(&uport->lock, &port_lock_key);  in uart_add_one_port()
2696 	if (uport->cons && uport->dev)  in uart_add_one_port()
2697 		of_console_check(uport->dev->of_node, uport->cons->name, uport->line);  in uart_add_one_port()
2699 	uart_configure_port(drv, state, uport);  in uart_add_one_port()
2702 	if (uport->attr_group)  in uart_add_one_port()
2705 	uport->tty_groups = kcalloc(num_groups, sizeof(*uport->tty_groups),  in uart_add_one_port()
2707 	if (!uport->tty_groups) {  in uart_add_one_port()
2711 	uport->tty_groups[0] = &tty_dev_attr_group;  in uart_add_one_port()
2712 	if (uport->attr_group)  in uart_add_one_port()
2713 		uport->tty_groups[1] = uport->attr_group;  in uart_add_one_port()
2720 			uport->line, uport->dev, port, uport->tty_groups);  in uart_add_one_port()
2724 		dev_err(uport->dev, "Cannot register tty device on line %d\n",  in uart_add_one_port()
2725 		       uport->line);  in uart_add_one_port()
2731 	uport->flags &= ~UPF_DEAD;  in uart_add_one_port()
2749 int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)  in uart_remove_one_port()  argument
2751 	struct uart_state *state = drv->state + uport->line;  in uart_remove_one_port()
2758 	if (state->uart_port != uport)  in uart_remove_one_port()
2759 		dev_alert(uport->dev, "Removing wrong port: %p != %p\n",  in uart_remove_one_port()
2760 			state->uart_port, uport);  in uart_remove_one_port()
2774 	uport->flags |= UPF_DEAD;  in uart_remove_one_port()
2780 	tty_unregister_device(drv->tty_driver, uport->line);  in uart_remove_one_port()
2791 	if (uart_console(uport))  in uart_remove_one_port()
2792 		unregister_console(uport->cons);  in uart_remove_one_port()
2797 	if (uport->type != PORT_UNKNOWN)  in uart_remove_one_port()
2798 		uport->ops->release_port(uport);  in uart_remove_one_port()
2799 	kfree(uport->tty_groups);  in uart_remove_one_port()
2804 	uport->type = PORT_UNKNOWN;  in uart_remove_one_port()
2845 void uart_handle_dcd_change(struct uart_port *uport, unsigned int status)  in uart_handle_dcd_change()  argument
2847 	struct tty_port *port = &uport->state->port;  in uart_handle_dcd_change()
2851 	lockdep_assert_held_once(&uport->lock);  in uart_handle_dcd_change()
2862 	uport->icount.dcd++;  in uart_handle_dcd_change()
2864 	if (uart_dcd_enabled(uport)) {  in uart_handle_dcd_change()
2880 void uart_handle_cts_change(struct uart_port *uport, unsigned int status)  in uart_handle_cts_change()  argument
2882 	lockdep_assert_held_once(&uport->lock);  in uart_handle_cts_change()
2884 	uport->icount.cts++;  in uart_handle_cts_change()
2886 	if (uart_softcts_mode(uport)) {  in uart_handle_cts_change()
2887 		if (uport->hw_stopped) {  in uart_handle_cts_change()
2889 				uport->hw_stopped = 0;  in uart_handle_cts_change()
2890 				uport->ops->start_tx(uport);  in uart_handle_cts_change()
2891 				uart_write_wakeup(uport);  in uart_handle_cts_change()
2895 				uport->hw_stopped = 1;  in uart_handle_cts_change()
2896 				uport->ops->stop_tx(uport);  in uart_handle_cts_change()