120 		struct uart_8250_port *up;  in serial8250_interrupt()  local
123 		up = list_entry(l, struct uart_8250_port, list);  in serial8250_interrupt()
124 		port = &up->port;  in serial8250_interrupt()
152 static void serial_do_unlink(struct irq_info *i, struct uart_8250_port *up)  in serial_do_unlink()  argument
157 		if (i->head == &up->list)  in serial_do_unlink()
159 		list_del(&up->list);  in serial_do_unlink()
161 		BUG_ON(i->head != &up->list);  in serial_do_unlink()
172 static int serial_link_irq_chain(struct uart_8250_port *up)  in serial_link_irq_chain()  argument
181 	h = &irq_lists[up->port.irq % NR_IRQ_HASH];  in serial_link_irq_chain()
185 		if (i->irq == up->port.irq)  in serial_link_irq_chain()
196 		i->irq = up->port.irq;  in serial_link_irq_chain()
204 		list_add(&up->list, i->head);  in serial_link_irq_chain()
209 		INIT_LIST_HEAD(&up->list);  in serial_link_irq_chain()
210 		i->head = &up->list;  in serial_link_irq_chain()
212 		ret = request_irq(up->port.irq, serial8250_interrupt,  in serial_link_irq_chain()
213 				  up->port.irqflags, up->port.name, i);  in serial_link_irq_chain()
215 			serial_do_unlink(i, up);  in serial_link_irq_chain()
221 static void serial_unlink_irq_chain(struct uart_8250_port *up)  in serial_unlink_irq_chain()  argument
233 	h = &irq_lists[up->port.irq % NR_IRQ_HASH];  in serial_unlink_irq_chain()
237 		if (i->irq == up->port.irq)  in serial_unlink_irq_chain()
245 		free_irq(up->port.irq, i);  in serial_unlink_irq_chain()
247 	serial_do_unlink(i, up);  in serial_unlink_irq_chain()
259 	struct uart_8250_port *up = from_timer(up, t, timer);  in serial8250_timeout()  local
261 	up->port.handle_irq(&up->port);  in serial8250_timeout()
262 	mod_timer(&up->timer, jiffies + uart_poll_timeout(&up->port));  in serial8250_timeout()
267 	struct uart_8250_port *up = from_timer(up, t, timer);  in serial8250_backup_timeout()  local
271 	spin_lock_irqsave(&up->port.lock, flags);  in serial8250_backup_timeout()
277 	if (up->port.irq) {  in serial8250_backup_timeout()
278 		ier = serial_in(up, UART_IER);  in serial8250_backup_timeout()
279 		serial_out(up, UART_IER, 0);  in serial8250_backup_timeout()
282 	iir = serial_in(up, UART_IIR);  in serial8250_backup_timeout()
290 	lsr = serial_in(up, UART_LSR);  in serial8250_backup_timeout()
291 	up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS;  in serial8250_backup_timeout()
292 	if ((iir & UART_IIR_NO_INT) && (up->ier & UART_IER_THRI) &&  in serial8250_backup_timeout()
293 	    (!uart_circ_empty(&up->port.state->xmit) || up->port.x_char) &&  in serial8250_backup_timeout()
300 		serial8250_tx_chars(up);  in serial8250_backup_timeout()
302 	if (up->port.irq)  in serial8250_backup_timeout()
303 		serial_out(up, UART_IER, ier);  in serial8250_backup_timeout()
305 	spin_unlock_irqrestore(&up->port.lock, flags);  in serial8250_backup_timeout()
308 	mod_timer(&up->timer,  in serial8250_backup_timeout()
309 		jiffies + uart_poll_timeout(&up->port) + HZ / 5);  in serial8250_backup_timeout()
312 static int univ8250_setup_irq(struct uart_8250_port *up)  in univ8250_setup_irq()  argument
314 	struct uart_port *port = &up->port;  in univ8250_setup_irq()
321 	if (up->bugs & UART_BUG_THRE) {  in univ8250_setup_irq()
324 		up->timer.function = serial8250_backup_timeout;  in univ8250_setup_irq()
325 		mod_timer(&up->timer, jiffies +  in univ8250_setup_irq()
335 		mod_timer(&up->timer, jiffies + uart_poll_timeout(port));  in univ8250_setup_irq()
337 		retval = serial_link_irq_chain(up);  in univ8250_setup_irq()
342 static void univ8250_release_irq(struct uart_8250_port *up)  in univ8250_release_irq()  argument
344 	struct uart_port *port = &up->port;  in univ8250_release_irq()
346 	del_timer_sync(&up->timer);  in univ8250_release_irq()
347 	up->timer.function = serial8250_timeout;  in univ8250_release_irq()
349 		serial_unlink_irq_chain(up);  in univ8250_release_irq()
353 static int serial8250_request_rsa_resource(struct uart_8250_port *up)  in serial8250_request_rsa_resource()  argument
355 	unsigned long start = UART_RSA_BASE << up->port.regshift;  in serial8250_request_rsa_resource()
356 	unsigned int size = 8 << up->port.regshift;  in serial8250_request_rsa_resource()
357 	struct uart_port *port = &up->port;  in serial8250_request_rsa_resource()
374 static void serial8250_release_rsa_resource(struct uart_8250_port *up)  in serial8250_release_rsa_resource()  argument
376 	unsigned long offset = UART_RSA_BASE << up->port.regshift;  in serial8250_release_rsa_resource()
377 	unsigned int size = 8 << up->port.regshift;  in serial8250_release_rsa_resource()
378 	struct uart_port *port = &up->port;  in serial8250_release_rsa_resource()
417 static void (*serial8250_isa_config)(int port, struct uart_port *up,
421 	void (*v)(int port, struct uart_port *up, u32 *capabilities))  in serial8250_set_isa_configurator()  argument
431 	struct uart_8250_port *up = up_to_u8250p(port);  in univ8250_config_port()  local
433 	up->probe &= ~UART_PROBE_RSA;  in univ8250_config_port()
435 		if (serial8250_request_rsa_resource(up) == 0)  in univ8250_config_port()
436 			up->probe |= UART_PROBE_RSA;  in univ8250_config_port()
441 			if (probe_rsa[i] == up->port.iobase) {  in univ8250_config_port()
442 				if (serial8250_request_rsa_resource(up) == 0)  in univ8250_config_port()
443 					up->probe |= UART_PROBE_RSA;  in univ8250_config_port()
451 	if (port->type != PORT_RSA && up->probe & UART_PROBE_RSA)  in univ8250_config_port()
452 		serial8250_release_rsa_resource(up);  in univ8250_config_port()
457 	struct uart_8250_port *up = up_to_u8250p(port);  in univ8250_request_port()  local
462 		ret = serial8250_request_rsa_resource(up);  in univ8250_request_port()
472 	struct uart_8250_port *up = up_to_u8250p(port);  in univ8250_release_port()  local
475 		serial8250_release_rsa_resource(up);  in univ8250_release_port()
490 static inline void serial8250_apply_quirks(struct uart_8250_port *up)  in serial8250_apply_quirks()  argument
492 	up->port.quirks |= skip_txen_test ? UPQ_NO_TXEN_TEST : 0;  in serial8250_apply_quirks()
497 	struct uart_8250_port *up;  in serial8250_isa_init_ports()  local
509 		struct uart_8250_port *up = &serial8250_ports[i];  in serial8250_isa_init_ports()  local
510 		struct uart_port *port = &up->port;  in serial8250_isa_init_ports()
513 		serial8250_init_port(up);  in serial8250_isa_init_ports()
518 		timer_setup(&up->timer, serial8250_timeout, 0);  in serial8250_isa_init_ports()
520 		up->ops = &univ8250_driver_ops;  in serial8250_isa_init_ports()
525 		up->mcr_mask = ~ALPHA_KLUDGE_MCR;  in serial8250_isa_init_ports()
526 		up->mcr_force = ALPHA_KLUDGE_MCR;  in serial8250_isa_init_ports()
527 		serial8250_set_defaults(up);  in serial8250_isa_init_ports()
537 	for (i = 0, up = serial8250_ports;  in serial8250_isa_init_ports()
539 	     i++, up++) {  in serial8250_isa_init_ports()
540 		struct uart_port *port = &up->port;  in serial8250_isa_init_ports()
554 			serial8250_isa_config(i, &up->port, &up->capabilities);  in serial8250_isa_init_ports()
564 		struct uart_8250_port *up = &serial8250_ports[i];  in serial8250_register_ports()  local
566 		if (up->port.type == PORT_8250_CIR)  in serial8250_register_ports()
569 		if (up->port.dev)  in serial8250_register_ports()
572 		up->port.dev = dev;  in serial8250_register_ports()
574 		serial8250_apply_quirks(up);  in serial8250_register_ports()
575 		uart_add_one_port(drv, &up->port);  in serial8250_register_ports()
584 	struct uart_8250_port *up = &serial8250_ports[co->index];  in univ8250_console_write()  local
586 	serial8250_console_write(up, s, count);  in univ8250_console_write()
759 	struct uart_8250_port *up = &serial8250_ports[line];  in serial8250_suspend_port()  local
760 	struct uart_port *port = &up->port;  in serial8250_suspend_port()
765 		serial_out(up, UART_SCR, canary);  in serial8250_suspend_port()
766 		if (serial_in(up, UART_SCR) == canary)  in serial8250_suspend_port()
767 			up->canary = canary;  in serial8250_suspend_port()
782 	struct uart_8250_port *up = &serial8250_ports[line];  in serial8250_resume_port()  local
783 	struct uart_port *port = &up->port;  in serial8250_resume_port()
785 	up->canary = 0;  in serial8250_resume_port()
787 	if (up->capabilities & UART_NATSEMI) {  in serial8250_resume_port()
791 		ns16550a_goto_highspeed(up);  in serial8250_resume_port()
859 		struct uart_8250_port *up = &serial8250_ports[i];  in serial8250_remove()  local
861 		if (up->port.dev == &dev->dev)  in serial8250_remove()
872 		struct uart_8250_port *up = &serial8250_ports[i];  in serial8250_suspend()  local
874 		if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)  in serial8250_suspend()
875 			uart_suspend_port(&serial8250_reg, &up->port);  in serial8250_suspend()
886 		struct uart_8250_port *up = &serial8250_ports[i];  in serial8250_resume()  local
888 		if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)  in serial8250_resume()
957 	struct uart_8250_port *up =  in serial_8250_overrun_backoff_work()  local
960 	struct uart_port *port = &up->port;  in serial_8250_overrun_backoff_work()
964 	up->ier |= UART_IER_RLSI | UART_IER_RDI;  in serial_8250_overrun_backoff_work()
965 	up->port.read_status_mask |= UART_LSR_DR;  in serial_8250_overrun_backoff_work()
966 	serial_out(up, UART_IER, up->ier);  in serial_8250_overrun_backoff_work()
972  *	@up: serial port template
975  *	port exists and is in use, it is hung up and unregistered
983 int serial8250_register_8250_port(struct uart_8250_port *up)  in serial8250_register_8250_port()  argument
988 	if (up->port.uartclk == 0)  in serial8250_register_8250_port()
993 	uart = serial8250_find_match_or_unused(&up->port);  in serial8250_register_8250_port()
1000 		uart->port.iobase       = up->port.iobase;  in serial8250_register_8250_port()
1001 		uart->port.membase      = up->port.membase;  in serial8250_register_8250_port()
1002 		uart->port.irq          = up->port.irq;  in serial8250_register_8250_port()
1003 		uart->port.irqflags     = up->port.irqflags;  in serial8250_register_8250_port()
1004 		uart->port.uartclk      = up->port.uartclk;  in serial8250_register_8250_port()
1005 		uart->port.fifosize     = up->port.fifosize;  in serial8250_register_8250_port()
1006 		uart->port.regshift     = up->port.regshift;  in serial8250_register_8250_port()
1007 		uart->port.iotype       = up->port.iotype;  in serial8250_register_8250_port()
1008 		uart->port.flags        = up->port.flags | UPF_BOOT_AUTOCONF;  in serial8250_register_8250_port()
1009 		uart->bugs		= up->bugs;  in serial8250_register_8250_port()
1010 		uart->port.mapbase      = up->port.mapbase;  in serial8250_register_8250_port()
1011 		uart->port.mapsize      = up->port.mapsize;  in serial8250_register_8250_port()
1012 		uart->port.private_data = up->port.private_data;  in serial8250_register_8250_port()
1013 		uart->tx_loadsz		= up->tx_loadsz;  in serial8250_register_8250_port()
1014 		uart->capabilities	= up->capabilities;  in serial8250_register_8250_port()
1015 		uart->port.throttle	= up->port.throttle;  in serial8250_register_8250_port()
1016 		uart->port.unthrottle	= up->port.unthrottle;  in serial8250_register_8250_port()
1017 		uart->port.rs485_config	= up->port.rs485_config;  in serial8250_register_8250_port()
1018 		uart->port.rs485	= up->port.rs485;  in serial8250_register_8250_port()
1019 		uart->rs485_start_tx	= up->rs485_start_tx;  in serial8250_register_8250_port()
1020 		uart->rs485_stop_tx	= up->rs485_stop_tx;  in serial8250_register_8250_port()
1021 		uart->dma		= up->dma;  in serial8250_register_8250_port()
1027 		if (up->port.dev) {  in serial8250_register_8250_port()
1028 			uart->port.dev = up->port.dev;  in serial8250_register_8250_port()
1034 		if (up->port.flags & UPF_FIXED_TYPE)  in serial8250_register_8250_port()
1035 			uart->port.type = up->port.type;  in serial8250_register_8250_port()
1054 		if (up->port.serial_in)  in serial8250_register_8250_port()
1055 			uart->port.serial_in = up->port.serial_in;  in serial8250_register_8250_port()
1056 		if (up->port.serial_out)  in serial8250_register_8250_port()
1057 			uart->port.serial_out = up->port.serial_out;  in serial8250_register_8250_port()
1058 		if (up->port.handle_irq)  in serial8250_register_8250_port()
1059 			uart->port.handle_irq = up->port.handle_irq;  in serial8250_register_8250_port()
1061 		if (up->port.set_termios)  in serial8250_register_8250_port()
1062 			uart->port.set_termios = up->port.set_termios;  in serial8250_register_8250_port()
1063 		if (up->port.set_ldisc)  in serial8250_register_8250_port()
1064 			uart->port.set_ldisc = up->port.set_ldisc;  in serial8250_register_8250_port()
1065 		if (up->port.get_mctrl)  in serial8250_register_8250_port()
1066 			uart->port.get_mctrl = up->port.get_mctrl;  in serial8250_register_8250_port()
1067 		if (up->port.set_mctrl)  in serial8250_register_8250_port()
1068 			uart->port.set_mctrl = up->port.set_mctrl;  in serial8250_register_8250_port()
1069 		if (up->port.get_divisor)  in serial8250_register_8250_port()
1070 			uart->port.get_divisor = up->port.get_divisor;  in serial8250_register_8250_port()
1071 		if (up->port.set_divisor)  in serial8250_register_8250_port()
1072 			uart->port.set_divisor = up->port.set_divisor;  in serial8250_register_8250_port()
1073 		if (up->port.startup)  in serial8250_register_8250_port()
1074 			uart->port.startup = up->port.startup;  in serial8250_register_8250_port()
1075 		if (up->port.shutdown)  in serial8250_register_8250_port()
1076 			uart->port.shutdown = up->port.shutdown;  in serial8250_register_8250_port()
1077 		if (up->port.pm)  in serial8250_register_8250_port()
1078 			uart->port.pm = up->port.pm;  in serial8250_register_8250_port()
1079 		if (up->port.handle_break)  in serial8250_register_8250_port()
1080 			uart->port.handle_break = up->port.handle_break;  in serial8250_register_8250_port()
1081 		if (up->dl_read)  in serial8250_register_8250_port()
1082 			uart->dl_read = up->dl_read;  in serial8250_register_8250_port()
1083 		if (up->dl_write)  in serial8250_register_8250_port()
1084 			uart->dl_write = up->dl_write;  in serial8250_register_8250_port()
1109 		if (up->overrun_backoff_time_ms > 0) {  in serial8250_register_8250_port()
1111 				up->overrun_backoff_time_ms;  in serial8250_register_8250_port()