224 static unsigned int sio_in(struct uart_sio_port *up, int offset)  in sio_in()  argument
226 	return __sio_in(up->port.iobase + offset);  in sio_in()
229 static void sio_out(struct uart_sio_port *up, int offset, int value)  in sio_out()  argument
231 	__sio_out(value, up->port.iobase + offset);  in sio_out()
234 static unsigned int serial_in(struct uart_sio_port *up, int offset)  in serial_in()  argument
242 static void serial_out(struct uart_sio_port *up, int offset, int value)  in serial_out()  argument
252 	struct uart_sio_port *up =  in m32r_sio_stop_tx()  local
255 	if (up->ier & UART_IER_THRI) {  in m32r_sio_stop_tx()
256 		up->ier &= ~UART_IER_THRI;  in m32r_sio_stop_tx()
257 		serial_out(up, UART_IER, up->ier);  in m32r_sio_stop_tx()
264 	struct uart_sio_port *up =  in m32r_sio_start_tx()  local
266 	struct circ_buf *xmit = &up->port.state->xmit;  in m32r_sio_start_tx()
268 	if (!(up->ier & UART_IER_THRI)) {  in m32r_sio_start_tx()
269 		up->ier |= UART_IER_THRI;  in m32r_sio_start_tx()
270 		serial_out(up, UART_IER, up->ier);  in m32r_sio_start_tx()
272 			serial_out(up, UART_TX, xmit->buf[xmit->tail]);  in m32r_sio_start_tx()
274 			up->port.icount.tx++;  in m32r_sio_start_tx()
277 	while((serial_in(up, UART_LSR) & UART_EMPTY) != UART_EMPTY);  in m32r_sio_start_tx()
279 	struct uart_sio_port *up =  in m32r_sio_start_tx()
282 	if (!(up->ier & UART_IER_THRI)) {  in m32r_sio_start_tx()
283 		up->ier |= UART_IER_THRI;  in m32r_sio_start_tx()
284 		serial_out(up, UART_IER, up->ier);  in m32r_sio_start_tx()
291 	struct uart_sio_port *up =  in m32r_sio_stop_rx()  local
294 	up->ier &= ~UART_IER_RLSI;  in m32r_sio_stop_rx()
295 	up->port.read_status_mask &= ~UART_LSR_DR;  in m32r_sio_stop_rx()
296 	serial_out(up, UART_IER, up->ier);  in m32r_sio_stop_rx()
301 	struct uart_sio_port *up =  in m32r_sio_enable_ms()  local
304 	up->ier |= UART_IER_MSI;  in m32r_sio_enable_ms()
305 	serial_out(up, UART_IER, up->ier);  in m32r_sio_enable_ms()
308 static void receive_chars(struct uart_sio_port *up, int *status)  in receive_chars()  argument
310 	struct tty_port *port = &up->port.state->port;  in receive_chars()
316 		ch = sio_in(up, SIORXB);  in receive_chars()
318 		up->port.icount.rx++;  in receive_chars()
327 				up->port.icount.brk++;  in receive_chars()
334 				if (uart_handle_break(&up->port))  in receive_chars()
337 				up->port.icount.parity++;  in receive_chars()
339 				up->port.icount.frame++;  in receive_chars()
341 				up->port.icount.overrun++;  in receive_chars()
346 			*status &= up->port.read_status_mask;  in receive_chars()
348 			if (up->port.line == up->port.cons->index) {  in receive_chars()
350 				*status |= up->lsr_break_flag;  in receive_chars()
351 				up->lsr_break_flag = 0;  in receive_chars()
362 		if (uart_handle_sysrq_char(&up->port, ch))  in receive_chars()
364 		if ((*status & up->port.ignore_status_mask) == 0)  in receive_chars()
376 		*status = serial_in(up, UART_LSR);  in receive_chars()
379 	spin_unlock(&up->port.lock);  in receive_chars()
381 	spin_lock(&up->port.lock);  in receive_chars()
384 static void transmit_chars(struct uart_sio_port *up)  in transmit_chars()  argument
386 	struct circ_buf *xmit = &up->port.state->xmit;  in transmit_chars()
389 	if (up->port.x_char) {  in transmit_chars()
391 		serial_out(up, UART_TX, up->port.x_char);  in transmit_chars()
393 		up->port.icount.tx++;  in transmit_chars()
394 		up->port.x_char = 0;  in transmit_chars()
397 	if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {  in transmit_chars()
398 		m32r_sio_stop_tx(&up->port);  in transmit_chars()
402 	count = up->port.fifosize;  in transmit_chars()
404 		serial_out(up, UART_TX, xmit->buf[xmit->tail]);  in transmit_chars()
406 		up->port.icount.tx++;  in transmit_chars()
409 		while (!(serial_in(up, UART_LSR) & UART_LSR_THRE));  in transmit_chars()
414 		uart_write_wakeup(&up->port);  in transmit_chars()
419 		m32r_sio_stop_tx(&up->port);  in transmit_chars()
425 static inline void m32r_sio_handle_port(struct uart_sio_port *up,  in m32r_sio_handle_port()  argument
431 		receive_chars(up, &status);  in m32r_sio_handle_port()
433 		transmit_chars(up);  in m32r_sio_handle_port()
470 		struct uart_sio_port *up;  in m32r_sio_interrupt()  local
473 		up = list_entry(l, struct uart_sio_port, list);  in m32r_sio_interrupt()
475 		sts = sio_in(up, SIOSTS);  in m32r_sio_interrupt()
477 			spin_lock(&up->port.lock);  in m32r_sio_interrupt()
478 			m32r_sio_handle_port(up, sts);  in m32r_sio_interrupt()
479 			spin_unlock(&up->port.lock);  in m32r_sio_interrupt()
508 static void serial_do_unlink(struct irq_info *i, struct uart_sio_port *up)  in serial_do_unlink()  argument
513 		if (i->head == &up->list)  in serial_do_unlink()
515 		list_del(&up->list);  in serial_do_unlink()
517 		BUG_ON(i->head != &up->list);  in serial_do_unlink()
524 static int serial_link_irq_chain(struct uart_sio_port *up)  in serial_link_irq_chain()  argument
526 	struct irq_info *i = irq_lists + up->port.irq;  in serial_link_irq_chain()
532 		list_add(&up->list, i->head);  in serial_link_irq_chain()
537 		INIT_LIST_HEAD(&up->list);  in serial_link_irq_chain()
538 		i->head = &up->list;  in serial_link_irq_chain()
541 		ret = request_irq(up->port.irq, m32r_sio_interrupt,  in serial_link_irq_chain()
543 		ret |= request_irq(up->port.irq + 1, m32r_sio_interrupt,  in serial_link_irq_chain()
546 			serial_do_unlink(i, up);  in serial_link_irq_chain()
552 static void serial_unlink_irq_chain(struct uart_sio_port *up)  in serial_unlink_irq_chain()  argument
554 	struct irq_info *i = irq_lists + up->port.irq;  in serial_unlink_irq_chain()
559 		free_irq(up->port.irq, i);  in serial_unlink_irq_chain()
560 		free_irq(up->port.irq + 1, i);  in serial_unlink_irq_chain()
563 	serial_do_unlink(i, up);  in serial_unlink_irq_chain()
571 	struct uart_sio_port *up = (struct uart_sio_port *)data;  in m32r_sio_timeout()  local
575 	sts = sio_in(up, SIOSTS);  in m32r_sio_timeout()
577 		spin_lock(&up->port.lock);  in m32r_sio_timeout()
578 		m32r_sio_handle_port(up, sts);  in m32r_sio_timeout()
579 		spin_unlock(&up->port.lock);  in m32r_sio_timeout()
582 	timeout = up->port.timeout;  in m32r_sio_timeout()
584 	mod_timer(&up->timer, jiffies + timeout);  in m32r_sio_timeout()
589 	struct uart_sio_port *up =  in m32r_sio_tx_empty()  local
594 	spin_lock_irqsave(&up->port.lock, flags);  in m32r_sio_tx_empty()
595 	ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;  in m32r_sio_tx_empty()
596 	spin_unlock_irqrestore(&up->port.lock, flags);  in m32r_sio_tx_empty()
618 	struct uart_sio_port *up =  in m32r_sio_startup()  local
629 	if (!up->port.irq) {  in m32r_sio_startup()
630 		unsigned int timeout = up->port.timeout;  in m32r_sio_startup()
634 		up->timer.data = (unsigned long)up;  in m32r_sio_startup()
635 		mod_timer(&up->timer, jiffies + timeout);  in m32r_sio_startup()
637 		retval = serial_link_irq_chain(up);  in m32r_sio_startup()
649 	up->ier = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;  in m32r_sio_startup()
650 	sio_out(up, SIOTRCR, up->ier);  in m32r_sio_startup()
662 	struct uart_sio_port *up =  in m32r_sio_shutdown()  local
668 	up->ier = 0;  in m32r_sio_shutdown()
669 	sio_out(up, SIOTRCR, 0);  in m32r_sio_shutdown()
677 	if (!up->port.irq)  in m32r_sio_shutdown()
678 		del_timer_sync(&up->timer);  in m32r_sio_shutdown()
680 		serial_unlink_irq_chain(up);  in m32r_sio_shutdown()
692 	struct uart_sio_port *up =  in m32r_sio_set_termios()  local
739 	spin_lock_irqsave(&up->port.lock, flags);  in m32r_sio_set_termios()
748 	up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;  in m32r_sio_set_termios()
750 		up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;  in m32r_sio_set_termios()
752 		up->port.read_status_mask |= UART_LSR_BI;  in m32r_sio_set_termios()
757 	up->port.ignore_status_mask = 0;  in m32r_sio_set_termios()
759 		up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;  in m32r_sio_set_termios()
761 		up->port.ignore_status_mask |= UART_LSR_BI;  in m32r_sio_set_termios()
767 			up->port.ignore_status_mask |= UART_LSR_OE;  in m32r_sio_set_termios()
774 		up->port.ignore_status_mask |= UART_LSR_DR;  in m32r_sio_set_termios()
779 	up->ier &= ~UART_IER_MSI;  in m32r_sio_set_termios()
780 	if (UART_ENABLE_MS(&up->port, termios->c_cflag))  in m32r_sio_set_termios()
781 		up->ier |= UART_IER_MSI;  in m32r_sio_set_termios()
783 	serial_out(up, UART_IER, up->ier);  in m32r_sio_set_termios()
785 	up->lcr = cval;					/* Save LCR */  in m32r_sio_set_termios()
786 	spin_unlock_irqrestore(&up->port.lock, flags);  in m32r_sio_set_termios()
792 	struct uart_sio_port *up =  in m32r_sio_pm()  local
795 	if (up->pm)  in m32r_sio_pm()
796 		up->pm(port, state, oldstate);  in m32r_sio_pm()
805 m32r_sio_request_std_resource(struct uart_sio_port *up, struct resource **res)  in m32r_sio_request_std_resource()  argument
807 	unsigned int size = 8 << up->port.regshift;  in m32r_sio_request_std_resource()
813 	switch (up->port.iotype) {  in m32r_sio_request_std_resource()
815 		if (up->port.mapbase) {  in m32r_sio_request_std_resource()
817 			*res = request_mem_region(up->port.mapbase, size, "serial");  in m32r_sio_request_std_resource()
819 			start = up->port.mapbase;  in m32r_sio_request_std_resource()
828 		*res = request_region(up->port.iobase, size, "serial");  in m32r_sio_request_std_resource()
838 	struct uart_sio_port *up =  in m32r_sio_release_port()  local
842 	size <<= up->port.regshift;  in m32r_sio_release_port()
844 	switch (up->port.iotype) {  in m32r_sio_release_port()
846 		if (up->port.mapbase) {  in m32r_sio_release_port()
850 			iounmap(up->port.membase);  in m32r_sio_release_port()
851 			up->port.membase = NULL;  in m32r_sio_release_port()
853 			start = up->port.mapbase;  in m32r_sio_release_port()
857 			release_mem_region(start, 8 << up->port.regshift);  in m32r_sio_release_port()
862 		start = up->port.iobase;  in m32r_sio_release_port()
866 		release_region(start + offset, 8 << up->port.regshift);  in m32r_sio_release_port()
876 	struct uart_sio_port *up =  in m32r_sio_request_port()  local
881 	ret = m32r_sio_request_std_resource(up, &res);  in m32r_sio_request_port()
886 	if (ret == 0 && up->port.flags & UPF_IOREMAP) {  in m32r_sio_request_port()
889 		up->port.membase = ioremap(up->port.mapbase, size);  in m32r_sio_request_port()
890 		if (!up->port.membase)  in m32r_sio_request_port()
904 	struct uart_sio_port *up =  in m32r_sio_config_port()  local
908 	spin_lock_irqsave(&up->port.lock, flags);  in m32r_sio_config_port()
910 	up->port.fifosize = 1;  in m32r_sio_config_port()
912 	spin_unlock_irqrestore(&up->port.lock, flags);  in m32r_sio_config_port()
946 	struct uart_sio_port *up;  in m32r_sio_init_ports()  local
954 	for (i = 0, up = m32r_sio_ports; i < ARRAY_SIZE(old_serial_port);  in m32r_sio_init_ports()
955 	     i++, up++) {  in m32r_sio_init_ports()
956 		up->port.iobase   = old_serial_port[i].port;  in m32r_sio_init_ports()
957 		up->port.irq      = irq_canonicalize(old_serial_port[i].irq);  in m32r_sio_init_ports()
958 		up->port.uartclk  = old_serial_port[i].baud_base * 16;  in m32r_sio_init_ports()
959 		up->port.flags    = old_serial_port[i].flags;  in m32r_sio_init_ports()
960 		up->port.membase  = old_serial_port[i].iomem_base;  in m32r_sio_init_ports()
961 		up->port.iotype   = old_serial_port[i].io_type;  in m32r_sio_init_ports()
962 		up->port.regshift = old_serial_port[i].iomem_reg_shift;  in m32r_sio_init_ports()
963 		up->port.ops      = &m32r_sio_pops;  in m32r_sio_init_ports()
974 		struct uart_sio_port *up = &m32r_sio_ports[i];  in m32r_sio_register_ports()  local
976 		up->port.line = i;  in m32r_sio_register_ports()
977 		up->port.ops = &m32r_sio_pops;  in m32r_sio_register_ports()
978 		init_timer(&up->timer);  in m32r_sio_register_ports()
979 		up->timer.function = m32r_sio_timeout;  in m32r_sio_register_ports()
981 		up->mcr_mask = ~0;  in m32r_sio_register_ports()
982 		up->mcr_force = 0;  in m32r_sio_register_ports()
984 		uart_add_one_port(drv, &up->port);  in m32r_sio_register_ports()
993 static inline void wait_for_xmitr(struct uart_sio_port *up)  in wait_for_xmitr()  argument
999 		status = sio_in(up, SIOSTS);  in wait_for_xmitr()
1007 	if (up->port.flags & UPF_CONS_FLOW) {  in wait_for_xmitr()
1016 	struct uart_sio_port *up =  in m32r_sio_console_putchar()  local
1019 	wait_for_xmitr(up);  in m32r_sio_console_putchar()
1020 	sio_out(up, SIOTXB, ch);  in m32r_sio_console_putchar()
1032 	struct uart_sio_port *up = &m32r_sio_ports[co->index];  in m32r_sio_console_write()  local
1038 	ier = sio_in(up, SIOTRCR);  in m32r_sio_console_write()
1039 	sio_out(up, SIOTRCR, 0);  in m32r_sio_console_write()
1041 	uart_console_write(&up->port, s, count, m32r_sio_console_putchar);  in m32r_sio_console_write()
1047 	wait_for_xmitr(up);  in m32r_sio_console_write()
1048 	sio_out(up, SIOTRCR, ier);  in m32r_sio_console_write()