244 static const char *snp_type(struct uart_port *port)  in snp_type()  argument
254 static unsigned int snp_tx_empty(struct uart_port *port)  in snp_tx_empty()  argument
264 static void snp_stop_tx(struct uart_port *port)  in snp_stop_tx()  argument
273 static void snp_release_port(struct uart_port *port)  in snp_release_port()  argument
282 static void snp_shutdown(struct uart_port *port)  in snp_shutdown()  argument
292 static void snp_set_mctrl(struct uart_port *port, unsigned int mctrl)  in snp_set_mctrl()  argument
301 static unsigned int snp_get_mctrl(struct uart_port *port)  in snp_get_mctrl()  argument
311 static void snp_stop_rx(struct uart_port *port)  in snp_stop_rx()  argument
320 static void snp_start_tx(struct uart_port *port)  in snp_start_tx()  argument
334 static void snp_break_ctl(struct uart_port *port, int break_state)  in snp_break_ctl()  argument
343 static int snp_startup(struct uart_port *port)  in snp_startup()  argument
356 snp_set_termios(struct uart_port *port, struct ktermios *termios,  in snp_set_termios()  argument
366 static int snp_request_port(struct uart_port *port)  in snp_request_port()  argument
377 static void snp_config_port(struct uart_port *port, int flags)  in snp_config_port()  argument
448 sn_receive_chars(struct sn_cons_port *port, unsigned long flags)  in sn_receive_chars()  argument
453 	if (!port) {  in sn_receive_chars()
458 	if (!port->sc_ops) {  in sn_receive_chars()
463 	if (port->sc_port.state) {  in sn_receive_chars()
465 		tport = &port->sc_port.state->port;  in sn_receive_chars()
468 	while (port->sc_ops->sal_input_pending()) {  in sn_receive_chars()
469 		ch = port->sc_ops->sal_getc();  in sn_receive_chars()
481                                 spin_unlock_irqrestore(&port->sc_port.lock, flags);  in sn_receive_chars()
483                                 spin_lock_irqsave(&port->sc_port.lock, flags);  in sn_receive_chars()
509 		port->sc_port.icount.rx++;  in sn_receive_chars()
528 static void sn_transmit_chars(struct sn_cons_port *port, int raw)  in sn_transmit_chars()  argument
535 	if (!port)  in sn_transmit_chars()
538 	BUG_ON(!port->sc_is_asynch);  in sn_transmit_chars()
540 	if (port->sc_port.state) {  in sn_transmit_chars()
542 		xmit = &port->sc_port.state->xmit;  in sn_transmit_chars()
551 	if (uart_circ_empty(xmit) || uart_tx_stopped(&port->sc_port)) {  in sn_transmit_chars()
572 				    port->sc_ops->sal_puts_raw(start,  in sn_transmit_chars()
576 				    port->sc_ops->sal_puts(start, xmit_count);  in sn_transmit_chars()
583 				port->sc_port.icount.tx += result;  in sn_transmit_chars()
593 		uart_write_wakeup(&port->sc_port);  in sn_transmit_chars()
596 		snp_stop_tx(&port->sc_port);	/* no-op for us */  in sn_transmit_chars()
607 	struct sn_cons_port *port = (struct sn_cons_port *)dev_id;  in sn_sal_interrupt()  local
611 	if (!port)  in sn_sal_interrupt()
614 	spin_lock_irqsave(&port->sc_port.lock, flags);  in sn_sal_interrupt()
616 		sn_receive_chars(port, flags);  in sn_sal_interrupt()
619 		sn_transmit_chars(port, TRANSMIT_BUFFERED);  in sn_sal_interrupt()
621 	spin_unlock_irqrestore(&port->sc_port.lock, flags);  in sn_sal_interrupt()
636 	struct sn_cons_port *port = (struct sn_cons_port *)data;  in sn_sal_timer_poll()  local
639 	if (!port)  in sn_sal_timer_poll()
642 	if (!port->sc_port.irq) {  in sn_sal_timer_poll()
643 		spin_lock_irqsave(&port->sc_port.lock, flags);  in sn_sal_timer_poll()
645 			sn_receive_chars(port, flags);  in sn_sal_timer_poll()
646 		sn_transmit_chars(port, TRANSMIT_RAW);  in sn_sal_timer_poll()
647 		spin_unlock_irqrestore(&port->sc_port.lock, flags);  in sn_sal_timer_poll()
648 		mod_timer(&port->sc_timer,  in sn_sal_timer_poll()
649 			  jiffies + port->sc_interrupt_timeout);  in sn_sal_timer_poll()
667 static void __init sn_sal_switch_to_asynch(struct sn_cons_port *port)  in sn_sal_switch_to_asynch()  argument
671 	if (!port)  in sn_sal_switch_to_asynch()
679 	spin_lock_irqsave(&port->sc_port.lock, flags);  in sn_sal_switch_to_asynch()
682 	if (!port->sc_ops)  in sn_sal_switch_to_asynch()
683 		port->sc_ops = &poll_ops;  in sn_sal_switch_to_asynch()
690 	init_timer(&port->sc_timer);  in sn_sal_switch_to_asynch()
691 	port->sc_timer.function = sn_sal_timer_poll;  in sn_sal_switch_to_asynch()
692 	port->sc_timer.data = (unsigned long)port;  in sn_sal_switch_to_asynch()
695 		port->sc_interrupt_timeout = 6;  in sn_sal_switch_to_asynch()
699 		port->sc_interrupt_timeout =  in sn_sal_switch_to_asynch()
702 	mod_timer(&port->sc_timer, jiffies + port->sc_interrupt_timeout);  in sn_sal_switch_to_asynch()
704 	port->sc_is_asynch = 1;  in sn_sal_switch_to_asynch()
705 	spin_unlock_irqrestore(&port->sc_port.lock, flags);  in sn_sal_switch_to_asynch()
719 static void __init sn_sal_switch_to_interrupts(struct sn_cons_port *port)  in sn_sal_switch_to_interrupts()  argument
723 	if (port) {  in sn_sal_switch_to_interrupts()
728 				"SAL console driver", port) >= 0) {  in sn_sal_switch_to_interrupts()
729 			spin_lock_irqsave(&port->sc_port.lock, flags);  in sn_sal_switch_to_interrupts()
730 			port->sc_port.irq = SGI_UART_VECTOR;  in sn_sal_switch_to_interrupts()
731 			port->sc_ops = &intr_ops;  in sn_sal_switch_to_interrupts()
732 			irq_set_handler(port->sc_port.irq, handle_level_irq);  in sn_sal_switch_to_interrupts()
736 			spin_unlock_irqrestore(&port->sc_port.lock, flags);  in sn_sal_switch_to_interrupts()
910 	struct sn_cons_port *port = &sal_console_port;  in sn_sal_console_write()  local
913 	BUG_ON(!port->sc_is_asynch);  in sn_sal_console_write()
918 	if (!port->sc_port.state) {  in sn_sal_console_write()
920 		puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);  in sn_sal_console_write()
926 	if (spin_is_locked(&port->sc_port.lock)) {  in sn_sal_console_write()
927 		int lhead = port->sc_port.state->xmit.head;  in sn_sal_console_write()
928 		int ltail = port->sc_port.state->xmit.tail;  in sn_sal_console_write()
943 			if (!spin_is_locked(&port->sc_port.lock)  in sn_sal_console_write()
946 					spin_lock_irqsave(&port->sc_port.lock,  in sn_sal_console_write()
953 				if ((lhead != port->sc_port.state->xmit.head)  in sn_sal_console_write()
955 					port->sc_port.state->xmit.tail)) {  in sn_sal_console_write()
957 						port->sc_port.state->xmit.head;  in sn_sal_console_write()
959 						port->sc_port.state->xmit.tail;  in sn_sal_console_write()
965 		sn_transmit_chars(port, 1);  in sn_sal_console_write()
967 			spin_unlock_irqrestore(&port->sc_port.lock, flags);  in sn_sal_console_write()
973 		puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);  in sn_sal_console_write()
976 		spin_lock_irqsave(&port->sc_port.lock, flags);  in sn_sal_console_write()
977 		sn_transmit_chars(port, 1);  in sn_sal_console_write()
978 		spin_unlock_irqrestore(&port->sc_port.lock, flags);  in sn_sal_console_write()
980 		puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count);  in sn_sal_console_write()