1 // SPDX-License-Identifier: GPL-2.0
10  *  Copyright (C) 2000-2002 Toshiba Corporation
12  *  Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller
23 #include <linux/serial.h>
33 /* "ttyS" is used for standard serial driver */
38 /* acts like standard serial driver */
54  * Number of serial ports
60 /* TXX9 Serial Registers */
161 	switch (up->iotype) {  in sio_in()
163 		return __raw_readl(up->membase + offset);  in sio_in()
165 		return inl(up->iobase + offset);  in sio_in()
172 	switch (up->iotype) {  in sio_out()
174 		__raw_writel(value, up->membase + offset);  in sio_out()
177 		outl(value, up->iobase + offset);  in sio_out()
221 	up->read_status_mask &= ~TXX9_SIDISR_RDIS;  in serial_txx9_stop_rx()
232 	while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout)  in serial_txx9_initialize()
240 		((up->flags & UPF_TXX9_USE_SCLK) ?  in serial_txx9_initialize()
258 		up->icount.rx++;  in receive_chars()
262 			up->ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK;  in receive_chars()
270 				up->icount.brk++;  in receive_chars()
280 				up->icount.parity++;  in receive_chars()
282 				up->icount.frame++;  in receive_chars()
284 				up->icount.overrun++;  in receive_chars()
298 			disr &= up->read_status_mask;  in receive_chars()
313 		up->ignore_status_mask = next_ignore_status_mask;  in receive_chars()
315 	} while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));  in receive_chars()
317 	tty_flip_buffer_push(&up->state->port);  in receive_chars()
404 	if (break_state == -1)  in serial_txx9_break_ctl()
420 	while (--tmout &&  in wait_for_xmitr()
425 	if (up->flags & UPF_CONS_FLOW) {  in wait_for_xmitr()
427 		while (--tmout &&  in wait_for_xmitr()
513 	retval = request_irq(up->irq, serial_txx9_interrupt,  in serial_txx9_startup()
522 	serial_txx9_set_mctrl(up, up->mctrl);  in serial_txx9_startup()
546 	serial_txx9_set_mctrl(up, up->mctrl);  in serial_txx9_shutdown()
555 	if (up->cons && up->line == up->cons->index) {  in serial_txx9_shutdown()
556 		free_irq(up->irq, up);  in serial_txx9_shutdown()
570 	free_irq(up->irq, up);  in serial_txx9_shutdown()
584 	termios->c_cflag &= ~(HUPCL | CMSPAR);  in serial_txx9_set_termios()
585 	termios->c_cflag |= CLOCAL;  in serial_txx9_set_termios()
590 	switch (termios->c_cflag & CSIZE) {  in serial_txx9_set_termios()
599 		termios->c_cflag &= ~CSIZE;  in serial_txx9_set_termios()
600 		termios->c_cflag |= CS8;  in serial_txx9_set_termios()
605 	if (termios->c_cflag & CSTOPB)  in serial_txx9_set_termios()
610 	if (termios->c_cflag & PARENB)  in serial_txx9_set_termios()
612 	if (!(termios->c_cflag & PARODD))  in serial_txx9_set_termios()
618 	baud = uart_get_baud_rate(up, termios, old, 0, up->uartclk/16/2);  in serial_txx9_set_termios()
626 	 * Ok, we're now changing the port state.  Do it with  in serial_txx9_set_termios()
632 	 * Update the per-port timeout.  in serial_txx9_set_termios()
634 	uart_update_timeout(up, termios->c_cflag, baud);  in serial_txx9_set_termios()
636 	up->read_status_mask = TXX9_SIDISR_UOER |  in serial_txx9_set_termios()
638 	if (termios->c_iflag & INPCK)  in serial_txx9_set_termios()
639 		up->read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER;  in serial_txx9_set_termios()
640 	if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK))  in serial_txx9_set_termios()
641 		up->read_status_mask |= TXX9_SIDISR_UBRK;  in serial_txx9_set_termios()
646 	up->ignore_status_mask = 0;  in serial_txx9_set_termios()
647 	if (termios->c_iflag & IGNPAR)  in serial_txx9_set_termios()
648 		up->ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER;  in serial_txx9_set_termios()
649 	if (termios->c_iflag & IGNBRK) {  in serial_txx9_set_termios()
650 		up->ignore_status_mask |= TXX9_SIDISR_UBRK;  in serial_txx9_set_termios()
655 		if (termios->c_iflag & IGNPAR)  in serial_txx9_set_termios()
656 			up->ignore_status_mask |= TXX9_SIDISR_UOER;  in serial_txx9_set_termios()
662 	if ((termios->c_cflag & CREAD) == 0)  in serial_txx9_set_termios()
663 		up->ignore_status_mask |= TXX9_SIDISR_RDIS;  in serial_txx9_set_termios()
666 	if ((termios->c_cflag & CRTSCTS) &&  in serial_txx9_set_termios()
667 	    (up->flags & UPF_TXX9_HAVE_CTS_LINE)) {  in serial_txx9_set_termios()
679 	serial_txx9_set_mctrl(up, up->mctrl);  in serial_txx9_set_termios()
684 serial_txx9_pm(struct uart_port *port, unsigned int state,  in serial_txx9_pm()  argument
688 	 * If oldstate was -1 this is called from  in serial_txx9_pm()
691 	 * non-console port) or should not be initialized here (for  in serial_txx9_pm()
693 	 * serial console settings.  in serial_txx9_pm()
695 	if (state == 0 && oldstate != -1)  in serial_txx9_pm()
704 	switch (up->iotype) {  in serial_txx9_request_resource()
706 		if (!up->mapbase)  in serial_txx9_request_resource()
709 		if (!request_mem_region(up->mapbase, size, "serial_txx9")) {  in serial_txx9_request_resource()
710 			ret = -EBUSY;  in serial_txx9_request_resource()
714 		if (up->flags & UPF_IOREMAP) {  in serial_txx9_request_resource()
715 			up->membase = ioremap(up->mapbase, size);  in serial_txx9_request_resource()
716 			if (!up->membase) {  in serial_txx9_request_resource()
717 				release_mem_region(up->mapbase, size);  in serial_txx9_request_resource()
718 				ret = -ENOMEM;  in serial_txx9_request_resource()
724 		if (!request_region(up->iobase, size, "serial_txx9"))  in serial_txx9_request_resource()
725 			ret = -EBUSY;  in serial_txx9_request_resource()
735 	switch (up->iotype) {  in serial_txx9_release_resource()
737 		if (!up->mapbase)  in serial_txx9_release_resource()
740 		if (up->flags & UPF_IOREMAP) {  in serial_txx9_release_resource()
741 			iounmap(up->membase);  in serial_txx9_release_resource()
742 			up->membase = NULL;  in serial_txx9_release_resource()
745 		release_mem_region(up->mapbase, size);  in serial_txx9_release_resource()
749 		release_region(up->iobase, size);  in serial_txx9_release_resource()
775 	up->type = PORT_TXX9;  in serial_txx9_config_port()
776 	up->fifosize = TXX9_SIO_TX_FIFO;  in serial_txx9_config_port()
779 	if (up->line == up->cons->index)  in serial_txx9_config_port()
823 		up->line = i;  in serial_txx9_register_ports()
824 		up->ops = &serial_txx9_pops;  in serial_txx9_register_ports()
825 		up->dev = dev;  in serial_txx9_register_ports()
826 		if (up->iobase || up->mapbase)  in serial_txx9_register_ports()
840  *	Print a string to the serial port trying not to disturb
848 	struct uart_port *up = &serial_txx9_ports[co->index];  in serial_txx9_console_write()
857 	 *	Disable flow-control if enabled (and unnecessary)  in serial_txx9_console_write()
860 	if (!(up->flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES))  in serial_txx9_console_write()
887 	if (co->index >= UART_NR)  in serial_txx9_console_setup()
888 		co->index = 0;  in serial_txx9_console_setup()
889 	up = &serial_txx9_ports[co->index];  in serial_txx9_console_setup()
890 	if (!up->ops)  in serial_txx9_console_setup()
891 		return -ENODEV;  in serial_txx9_console_setup()
908 	.index		= -1,
936 	if (port->line >= ARRAY_SIZE(serial_txx9_ports))  in early_serial_txx9_setup()
937 		return -ENODEV;  in early_serial_txx9_setup()
939 	serial_txx9_ports[port->line] = *port;  in early_serial_txx9_setup()
940 	serial_txx9_ports[port->line].ops = &serial_txx9_pops;  in early_serial_txx9_setup()
941 	serial_txx9_ports[port->line].flags |=  in early_serial_txx9_setup()
949  *	serial_txx9_register_port - register a serial port
950  *	@port: serial port template
952  *	Configure the serial port specified by the request.
963 	int ret = -ENOSPC;  in serial_txx9_register_port()
977 			if (!(uart->iobase || uart->mapbase))  in serial_txx9_register_port()
982 		uart->iobase = port->iobase;  in serial_txx9_register_port()
983 		uart->membase = port->membase;  in serial_txx9_register_port()
984 		uart->irq      = port->irq;  in serial_txx9_register_port()
985 		uart->uartclk  = port->uartclk;  in serial_txx9_register_port()
986 		uart->iotype   = port->iotype;  in serial_txx9_register_port()
987 		uart->flags    = port->flags  in serial_txx9_register_port()
989 		uart->mapbase  = port->mapbase;  in serial_txx9_register_port()
990 		if (port->dev)  in serial_txx9_register_port()
991 			uart->dev = port->dev;  in serial_txx9_register_port()
994 			ret = uart->line;  in serial_txx9_register_port()
1001  *	serial_txx9_unregister_port - remove a txx9 serial port at runtime
1002  *	@line: serial line number
1004  *	Remove one serial port.  This may not be called from interrupt
1013 	uart->flags = 0;  in serial_txx9_unregister_port()
1014 	uart->type = PORT_UNKNOWN;  in serial_txx9_unregister_port()
1015 	uart->iobase = 0;  in serial_txx9_unregister_port()
1016 	uart->mapbase = 0;  in serial_txx9_unregister_port()
1017 	uart->membase = NULL;  in serial_txx9_unregister_port()
1018 	uart->dev = NULL;  in serial_txx9_unregister_port()
1023  * Register a set of serial devices attached to a platform device.
1027 	struct uart_port *p = dev_get_platdata(&dev->dev);  in serial_txx9_probe()
1032 	for (i = 0; p && p->uartclk != 0; p++, i++) {  in serial_txx9_probe()
1033 		port.iobase	= p->iobase;  in serial_txx9_probe()
1034 		port.membase	= p->membase;  in serial_txx9_probe()
1035 		port.irq	= p->irq;  in serial_txx9_probe()
1036 		port.uartclk	= p->uartclk;  in serial_txx9_probe()
1037 		port.iotype	= p->iotype;  in serial_txx9_probe()
1038 		port.flags	= p->flags;  in serial_txx9_probe()
1039 		port.mapbase	= p->mapbase;  in serial_txx9_probe()
1040 		port.dev	= &dev->dev;  in serial_txx9_probe()
1044 			dev_err(&dev->dev, "unable to register port at index %d "  in serial_txx9_probe()
1046 				p->iobase, (unsigned long long)p->mapbase,  in serial_txx9_probe()
1047 				p->irq, ret);  in serial_txx9_probe()
1054  * Remove serial ports registered against a platform device.
1063 		if (up->dev == &dev->dev)  in serial_txx9_remove()
1069 static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state)  in serial_txx9_suspend()  argument
1076 		if (up->type != PORT_UNKNOWN && up->dev == &dev->dev)  in serial_txx9_suspend()
1090 		if (up->type != PORT_UNKNOWN && up->dev == &dev->dev)  in serial_txx9_resume()
1112  * Probe one serial board.  Unfortunately, there is no rhyme nor reason
1113  * to the arrangement of serial ports on a PCI card.
1130 	port.irq = dev->irq;  in pciserial_txx9_init_one()
1133 	port.dev = &dev->dev;  in pciserial_txx9_init_one()
1136 		printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);  in pciserial_txx9_init_one()
1150 		serial_txx9_unregister_port(up->line);  in pciserial_txx9_remove_one()
1156 static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)  in pciserial_txx9_suspend_one()  argument
1163 	pci_set_power_state(dev, pci_choose_state(dev, state));  in pciserial_txx9_suspend_one()
1208 	serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1);  in serial_txx9_init()
1210 		ret = -ENOMEM;  in serial_txx9_init()
1219 				   &serial_txx9_plat_devs->dev);  in serial_txx9_init()
1255 		if (up->iobase || up->mapbase)  in serial_txx9_exit()
1266 MODULE_DESCRIPTION("TX39/49 serial driver");