tty: move drivers/serial/ to drivers/tty/serial/

The serial drivers are really just tty drivers, so move them to
drivers/tty/ to make things a bit neater overall.

This is part of the tty/serial driver movement proceedure as proposed by
Arnd Bergmann and approved by everyone involved a number of months ago.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Rogier Wolff <R.E.Wolff@bitwizard.nl>
Cc: Michael H. Warfield <mhw@wittsend.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 709 deletions

diff --git a/drivers/serial/uartlite.c b/drivers/serial/uartlite.c
deleted file mode 100644
index d2fce86..0000000
--- a/drivers/serial/uartlite.c
+++ /dev/null
@@ -1,709 +0,0 @@
-/*
- * uartlite.c: Serial driver for Xilinx uartlite serial controller
- *
- * Copyright (C) 2006 Peter Korsgaard <jacmet@sunsite.dk>
- * Copyright (C) 2007 Secret Lab Technologies Ltd.
- *
- * This file is licensed under the terms of the GNU General Public License
- * version 2.  This program is licensed "as is" without any warranty of any
- * kind, whether express or implied.
- */
-
-#include <linux/platform_device.h>
-#include <linux/module.h>
-#include <linux/console.h>
-#include <linux/serial.h>
-#include <linux/serial_core.h>
-#include <linux/tty.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <asm/io.h>
-#if defined(CONFIG_OF) && (defined(CONFIG_PPC32) || defined(CONFIG_MICROBLAZE))
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_device.h>
-#include <linux/of_platform.h>
-
-/* Match table for of_platform binding */
-static struct of_device_id ulite_of_match[] __devinitdata = {
-	{ .compatible = "xlnx,opb-uartlite-1.00.b", },
-	{ .compatible = "xlnx,xps-uartlite-1.00.a", },
-	{}
-};
-MODULE_DEVICE_TABLE(of, ulite_of_match);
-
-#endif
-
-#define ULITE_NAME		"ttyUL"
-#define ULITE_MAJOR		204
-#define ULITE_MINOR		187
-#define ULITE_NR_UARTS		4
-
-/* ---------------------------------------------------------------------
- * Register definitions
- *
- * For register details see datasheet:
- * http://www.xilinx.com/support/documentation/ip_documentation/opb_uartlite.pdf 
- */
-
-#define ULITE_RX		0x00
-#define ULITE_TX		0x04
-#define ULITE_STATUS		0x08
-#define ULITE_CONTROL		0x0c
-
-#define ULITE_REGION		16
-
-#define ULITE_STATUS_RXVALID	0x01
-#define ULITE_STATUS_RXFULL	0x02
-#define ULITE_STATUS_TXEMPTY	0x04
-#define ULITE_STATUS_TXFULL	0x08
-#define ULITE_STATUS_IE		0x10
-#define ULITE_STATUS_OVERRUN	0x20
-#define ULITE_STATUS_FRAME	0x40
-#define ULITE_STATUS_PARITY	0x80
-
-#define ULITE_CONTROL_RST_TX	0x01
-#define ULITE_CONTROL_RST_RX	0x02
-#define ULITE_CONTROL_IE	0x10
-
-
-static struct uart_port ulite_ports[ULITE_NR_UARTS];
-
-/* ---------------------------------------------------------------------
- * Core UART driver operations
- */
-
-static int ulite_receive(struct uart_port *port, int stat)
-{
-	struct tty_struct *tty = port->state->port.tty;
-	unsigned char ch = 0;
-	char flag = TTY_NORMAL;
-
-	if ((stat & (ULITE_STATUS_RXVALID | ULITE_STATUS_OVERRUN
-		     | ULITE_STATUS_FRAME)) == 0)
-		return 0;
-
-	/* stats */
-	if (stat & ULITE_STATUS_RXVALID) {
-		port->icount.rx++;
-		ch = ioread32be(port->membase + ULITE_RX);
-
-		if (stat & ULITE_STATUS_PARITY)
-			port->icount.parity++;
-	}
-
-	if (stat & ULITE_STATUS_OVERRUN)
-		port->icount.overrun++;
-
-	if (stat & ULITE_STATUS_FRAME)
-		port->icount.frame++;
-
-
-	/* drop byte with parity error if IGNPAR specificed */
-	if (stat & port->ignore_status_mask & ULITE_STATUS_PARITY)
-		stat &= ~ULITE_STATUS_RXVALID;
-
-	stat &= port->read_status_mask;
-
-	if (stat & ULITE_STATUS_PARITY)
-		flag = TTY_PARITY;
-
-
-	stat &= ~port->ignore_status_mask;
-
-	if (stat & ULITE_STATUS_RXVALID)
-		tty_insert_flip_char(tty, ch, flag);
-
-	if (stat & ULITE_STATUS_FRAME)
-		tty_insert_flip_char(tty, 0, TTY_FRAME);
-
-	if (stat & ULITE_STATUS_OVERRUN)
-		tty_insert_flip_char(tty, 0, TTY_OVERRUN);
-
-	return 1;
-}
-
-static int ulite_transmit(struct uart_port *port, int stat)
-{
-	struct circ_buf *xmit  = &port->state->xmit;
-
-	if (stat & ULITE_STATUS_TXFULL)
-		return 0;
-
-	if (port->x_char) {
-		iowrite32be(port->x_char, port->membase + ULITE_TX);
-		port->x_char = 0;
-		port->icount.tx++;
-		return 1;
-	}
-
-	if (uart_circ_empty(xmit) || uart_tx_stopped(port))
-		return 0;
-
-	iowrite32be(xmit->buf[xmit->tail], port->membase + ULITE_TX);
-	xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE-1);
-	port->icount.tx++;
-
-	/* wake up */
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(port);
-
-	return 1;
-}
-
-static irqreturn_t ulite_isr(int irq, void *dev_id)
-{
-	struct uart_port *port = dev_id;
-	int busy, n = 0;
-
-	do {
-		int stat = ioread32be(port->membase + ULITE_STATUS);
-		busy  = ulite_receive(port, stat);
-		busy |= ulite_transmit(port, stat);
-		n++;
-	} while (busy);
-
-	/* work done? */
-	if (n > 1) {
-		tty_flip_buffer_push(port->state->port.tty);
-		return IRQ_HANDLED;
-	} else {
-		return IRQ_NONE;
-	}
-}
-
-static unsigned int ulite_tx_empty(struct uart_port *port)
-{
-	unsigned long flags;
-	unsigned int ret;
-
-	spin_lock_irqsave(&port->lock, flags);
-	ret = ioread32be(port->membase + ULITE_STATUS);
-	spin_unlock_irqrestore(&port->lock, flags);
-
-	return ret & ULITE_STATUS_TXEMPTY ? TIOCSER_TEMT : 0;
-}
-
-static unsigned int ulite_get_mctrl(struct uart_port *port)
-{
-	return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
-}
-
-static void ulite_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
-	/* N/A */
-}
-
-static void ulite_stop_tx(struct uart_port *port)
-{
-	/* N/A */
-}
-
-static void ulite_start_tx(struct uart_port *port)
-{
-	ulite_transmit(port, ioread32be(port->membase + ULITE_STATUS));
-}
-
-static void ulite_stop_rx(struct uart_port *port)
-{
-	/* don't forward any more data (like !CREAD) */
-	port->ignore_status_mask = ULITE_STATUS_RXVALID | ULITE_STATUS_PARITY
-		| ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN;
-}
-
-static void ulite_enable_ms(struct uart_port *port)
-{
-	/* N/A */
-}
-
-static void ulite_break_ctl(struct uart_port *port, int ctl)
-{
-	/* N/A */
-}
-
-static int ulite_startup(struct uart_port *port)
-{
-	int ret;
-
-	ret = request_irq(port->irq, ulite_isr,
-			  IRQF_SHARED | IRQF_SAMPLE_RANDOM, "uartlite", port);
-	if (ret)
-		return ret;
-
-	iowrite32be(ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX,
-	       port->membase + ULITE_CONTROL);
-	iowrite32be(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL);
-
-	return 0;
-}
-
-static void ulite_shutdown(struct uart_port *port)
-{
-	iowrite32be(0, port->membase + ULITE_CONTROL);
-	ioread32be(port->membase + ULITE_CONTROL); /* dummy */
-	free_irq(port->irq, port);
-}
-
-static void ulite_set_termios(struct uart_port *port, struct ktermios *termios,
-			      struct ktermios *old)
-{
-	unsigned long flags;
-	unsigned int baud;
-
-	spin_lock_irqsave(&port->lock, flags);
-
-	port->read_status_mask = ULITE_STATUS_RXVALID | ULITE_STATUS_OVERRUN
-		| ULITE_STATUS_TXFULL;
-
-	if (termios->c_iflag & INPCK)
-		port->read_status_mask |=
-			ULITE_STATUS_PARITY | ULITE_STATUS_FRAME;
-
-	port->ignore_status_mask = 0;
-	if (termios->c_iflag & IGNPAR)
-		port->ignore_status_mask |= ULITE_STATUS_PARITY
-			| ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN;
-
-	/* ignore all characters if CREAD is not set */
-	if ((termios->c_cflag & CREAD) == 0)
-		port->ignore_status_mask |=
-			ULITE_STATUS_RXVALID | ULITE_STATUS_PARITY
-			| ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN;
-
-	/* update timeout */
-	baud = uart_get_baud_rate(port, termios, old, 0, 460800);
-	uart_update_timeout(port, termios->c_cflag, baud);
-
-	spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static const char *ulite_type(struct uart_port *port)
-{
-	return port->type == PORT_UARTLITE ? "uartlite" : NULL;
-}
-
-static void ulite_release_port(struct uart_port *port)
-{
-	release_mem_region(port->mapbase, ULITE_REGION);
-	iounmap(port->membase);
-	port->membase = NULL;
-}
-
-static int ulite_request_port(struct uart_port *port)
-{
-	pr_debug("ulite console: port=%p; port->mapbase=%llx\n",
-		 port, (unsigned long long) port->mapbase);
-
-	if (!request_mem_region(port->mapbase, ULITE_REGION, "uartlite")) {
-		dev_err(port->dev, "Memory region busy\n");
-		return -EBUSY;
-	}
-
-	port->membase = ioremap(port->mapbase, ULITE_REGION);
-	if (!port->membase) {
-		dev_err(port->dev, "Unable to map registers\n");
-		release_mem_region(port->mapbase, ULITE_REGION);
-		return -EBUSY;
-	}
-
-	return 0;
-}
-
-static void ulite_config_port(struct uart_port *port, int flags)
-{
-	if (!ulite_request_port(port))
-		port->type = PORT_UARTLITE;
-}
-
-static int ulite_verify_port(struct uart_port *port, struct serial_struct *ser)
-{
-	/* we don't want the core code to modify any port params */
-	return -EINVAL;
-}
-
-#ifdef CONFIG_CONSOLE_POLL
-static int ulite_get_poll_char(struct uart_port *port)
-{
-	if (!(ioread32be(port->membase + ULITE_STATUS)
-						& ULITE_STATUS_RXVALID))
-		return NO_POLL_CHAR;
-
-	return ioread32be(port->membase + ULITE_RX);
-}
-
-static void ulite_put_poll_char(struct uart_port *port, unsigned char ch)
-{
-	while (ioread32be(port->membase + ULITE_STATUS) & ULITE_STATUS_TXFULL)
-		cpu_relax();
-
-	/* write char to device */
-	iowrite32be(ch, port->membase + ULITE_TX);
-}
-#endif
-
-static struct uart_ops ulite_ops = {
-	.tx_empty	= ulite_tx_empty,
-	.set_mctrl	= ulite_set_mctrl,
-	.get_mctrl	= ulite_get_mctrl,
-	.stop_tx	= ulite_stop_tx,
-	.start_tx	= ulite_start_tx,
-	.stop_rx	= ulite_stop_rx,
-	.enable_ms	= ulite_enable_ms,
-	.break_ctl	= ulite_break_ctl,
-	.startup	= ulite_startup,
-	.shutdown	= ulite_shutdown,
-	.set_termios	= ulite_set_termios,
-	.type		= ulite_type,
-	.release_port	= ulite_release_port,
-	.request_port	= ulite_request_port,
-	.config_port	= ulite_config_port,
-	.verify_port	= ulite_verify_port,
-#ifdef CONFIG_CONSOLE_POLL
-	.poll_get_char	= ulite_get_poll_char,
-	.poll_put_char	= ulite_put_poll_char,
-#endif
-};
-
-/* ---------------------------------------------------------------------
- * Console driver operations
- */
-
-#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE
-static void ulite_console_wait_tx(struct uart_port *port)
-{
-	int i;
-	u8 val;
-
-	/* Spin waiting for TX fifo to have space available */
-	for (i = 0; i < 100000; i++) {
-		val = ioread32be(port->membase + ULITE_STATUS);
-		if ((val & ULITE_STATUS_TXFULL) == 0)
-			break;
-		cpu_relax();
-	}
-}
-
-static void ulite_console_putchar(struct uart_port *port, int ch)
-{
-	ulite_console_wait_tx(port);
-	iowrite32be(ch, port->membase + ULITE_TX);
-}
-
-static void ulite_console_write(struct console *co, const char *s,
-				unsigned int count)
-{
-	struct uart_port *port = &ulite_ports[co->index];
-	unsigned long flags;
-	unsigned int ier;
-	int locked = 1;
-
-	if (oops_in_progress) {
-		locked = spin_trylock_irqsave(&port->lock, flags);
-	} else
-		spin_lock_irqsave(&port->lock, flags);
-
-	/* save and disable interrupt */
-	ier = ioread32be(port->membase + ULITE_STATUS) & ULITE_STATUS_IE;
-	iowrite32be(0, port->membase + ULITE_CONTROL);
-
-	uart_console_write(port, s, count, ulite_console_putchar);
-
-	ulite_console_wait_tx(port);
-
-	/* restore interrupt state */
-	if (ier)
-		iowrite32be(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL);
-
-	if (locked)
-		spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static int __devinit ulite_console_setup(struct console *co, char *options)
-{
-	struct uart_port *port;
-	int baud = 9600;
-	int bits = 8;
-	int parity = 'n';
-	int flow = 'n';
-
-	if (co->index < 0 || co->index >= ULITE_NR_UARTS)
-		return -EINVAL;
-
-	port = &ulite_ports[co->index];
-
-	/* Has the device been initialized yet? */
-	if (!port->mapbase) {
-		pr_debug("console on ttyUL%i not present\n", co->index);
-		return -ENODEV;
-	}
-
-	/* not initialized yet? */
-	if (!port->membase) {
-		if (ulite_request_port(port))
-			return -ENODEV;
-	}
-
-	if (options)
-		uart_parse_options(options, &baud, &parity, &bits, &flow);
-
-	return uart_set_options(port, co, baud, parity, bits, flow);
-}
-
-static struct uart_driver ulite_uart_driver;
-
-static struct console ulite_console = {
-	.name	= ULITE_NAME,
-	.write	= ulite_console_write,
-	.device	= uart_console_device,
-	.setup	= ulite_console_setup,
-	.flags	= CON_PRINTBUFFER,
-	.index	= -1, /* Specified on the cmdline (e.g. console=ttyUL0 ) */
-	.data	= &ulite_uart_driver,
-};
-
-static int __init ulite_console_init(void)
-{
-	register_console(&ulite_console);
-	return 0;
-}
-
-console_initcall(ulite_console_init);
-
-#endif /* CONFIG_SERIAL_UARTLITE_CONSOLE */
-
-static struct uart_driver ulite_uart_driver = {
-	.owner		= THIS_MODULE,
-	.driver_name	= "uartlite",
-	.dev_name	= ULITE_NAME,
-	.major		= ULITE_MAJOR,
-	.minor		= ULITE_MINOR,
-	.nr		= ULITE_NR_UARTS,
-#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE
-	.cons		= &ulite_console,
-#endif
-};
-
-/* ---------------------------------------------------------------------
- * Port assignment functions (mapping devices to uart_port structures)
- */
-
-/** ulite_assign: register a uartlite device with the driver
- *
- * @dev: pointer to device structure
- * @id: requested id number.  Pass -1 for automatic port assignment
- * @base: base address of uartlite registers
- * @irq: irq number for uartlite
- *
- * Returns: 0 on success, <0 otherwise
- */
-static int __devinit ulite_assign(struct device *dev, int id, u32 base, int irq)
-{
-	struct uart_port *port;
-	int rc;
-
-	/* if id = -1; then scan for a free id and use that */
-	if (id < 0) {
-		for (id = 0; id < ULITE_NR_UARTS; id++)
-			if (ulite_ports[id].mapbase == 0)
-				break;
-	}
-	if (id < 0 || id >= ULITE_NR_UARTS) {
-		dev_err(dev, "%s%i too large\n", ULITE_NAME, id);
-		return -EINVAL;
-	}
-
-	if ((ulite_ports[id].mapbase) && (ulite_ports[id].mapbase != base)) {
-		dev_err(dev, "cannot assign to %s%i; it is already in use\n",
-			ULITE_NAME, id);
-		return -EBUSY;
-	}
-
-	port = &ulite_ports[id];
-
-	spin_lock_init(&port->lock);
-	port->fifosize = 16;
-	port->regshift = 2;
-	port->iotype = UPIO_MEM;
-	port->iobase = 1; /* mark port in use */
-	port->mapbase = base;
-	port->membase = NULL;
-	port->ops = &ulite_ops;
-	port->irq = irq;
-	port->flags = UPF_BOOT_AUTOCONF;
-	port->dev = dev;
-	port->type = PORT_UNKNOWN;
-	port->line = id;
-
-	dev_set_drvdata(dev, port);
-
-	/* Register the port */
-	rc = uart_add_one_port(&ulite_uart_driver, port);
-	if (rc) {
-		dev_err(dev, "uart_add_one_port() failed; err=%i\n", rc);
-		port->mapbase = 0;
-		dev_set_drvdata(dev, NULL);
-		return rc;
-	}
-
-	return 0;
-}
-
-/** ulite_release: register a uartlite device with the driver
- *
- * @dev: pointer to device structure
- */
-static int __devexit ulite_release(struct device *dev)
-{
-	struct uart_port *port = dev_get_drvdata(dev);
-	int rc = 0;
-
-	if (port) {
-		rc = uart_remove_one_port(&ulite_uart_driver, port);
-		dev_set_drvdata(dev, NULL);
-		port->mapbase = 0;
-	}
-
-	return rc;
-}
-
-/* ---------------------------------------------------------------------
- * Platform bus binding
- */
-
-static int __devinit ulite_probe(struct platform_device *pdev)
-{
-	struct resource *res, *res2;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENODEV;
-
-	res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!res2)
-		return -ENODEV;
-
-	return ulite_assign(&pdev->dev, pdev->id, res->start, res2->start);
-}
-
-static int __devexit ulite_remove(struct platform_device *pdev)
-{
-	return ulite_release(&pdev->dev);
-}
-
-/* work with hotplug and coldplug */
-MODULE_ALIAS("platform:uartlite");
-
-static struct platform_driver ulite_platform_driver = {
-	.probe	= ulite_probe,
-	.remove	= __devexit_p(ulite_remove),
-	.driver	= {
-		   .owner = THIS_MODULE,
-		   .name  = "uartlite",
-		   },
-};
-
-/* ---------------------------------------------------------------------
- * OF bus bindings
- */
-#if defined(CONFIG_OF) && (defined(CONFIG_PPC32) || defined(CONFIG_MICROBLAZE))
-static int __devinit
-ulite_of_probe(struct platform_device *op, const struct of_device_id *match)
-{
-	struct resource res;
-	const unsigned int *id;
-	int irq, rc;
-
-	dev_dbg(&op->dev, "%s(%p, %p)\n", __func__, op, match);
-
-	rc = of_address_to_resource(op->dev.of_node, 0, &res);
-	if (rc) {
-		dev_err(&op->dev, "invalid address\n");
-		return rc;
-	}
-
-	irq = irq_of_parse_and_map(op->dev.of_node, 0);
-
-	id = of_get_property(op->dev.of_node, "port-number", NULL);
-
-	return ulite_assign(&op->dev, id ? *id : -1, res.start, irq);
-}
-
-static int __devexit ulite_of_remove(struct platform_device *op)
-{
-	return ulite_release(&op->dev);
-}
-
-static struct of_platform_driver ulite_of_driver = {
-	.probe = ulite_of_probe,
-	.remove = __devexit_p(ulite_of_remove),
-	.driver = {
-		.name = "uartlite",
-		.owner = THIS_MODULE,
-		.of_match_table = ulite_of_match,
-	},
-};
-
-/* Registration helpers to keep the number of #ifdefs to a minimum */
-static inline int __init ulite_of_register(void)
-{
-	pr_debug("uartlite: calling of_register_platform_driver()\n");
-	return of_register_platform_driver(&ulite_of_driver);
-}
-
-static inline void __exit ulite_of_unregister(void)
-{
-	of_unregister_platform_driver(&ulite_of_driver);
-}
-#else /* CONFIG_OF && (CONFIG_PPC32 || CONFIG_MICROBLAZE) */
-/* Appropriate config not enabled; do nothing helpers */
-static inline int __init ulite_of_register(void) { return 0; }
-static inline void __exit ulite_of_unregister(void) { }
-#endif /* CONFIG_OF && (CONFIG_PPC32 || CONFIG_MICROBLAZE) */
-
-/* ---------------------------------------------------------------------
- * Module setup/teardown
- */
-
-int __init ulite_init(void)
-{
-	int ret;
-
-	pr_debug("uartlite: calling uart_register_driver()\n");
-	ret = uart_register_driver(&ulite_uart_driver);
-	if (ret)
-		goto err_uart;
-
-	ret = ulite_of_register();
-	if (ret)
-		goto err_of;
-
-	pr_debug("uartlite: calling platform_driver_register()\n");
-	ret = platform_driver_register(&ulite_platform_driver);
-	if (ret)
-		goto err_plat;
-
-	return 0;
-
-err_plat:
-	ulite_of_unregister();
-err_of:
-	uart_unregister_driver(&ulite_uart_driver);
-err_uart:
-	printk(KERN_ERR "registering uartlite driver failed: err=%i", ret);
-	return ret;
-}
-
-void __exit ulite_exit(void)
-{
-	platform_driver_unregister(&ulite_platform_driver);
-	ulite_of_unregister();
-	uart_unregister_driver(&ulite_uart_driver);
-}
-
-module_init(ulite_init);
-module_exit(ulite_exit);
-
-MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>");
-MODULE_DESCRIPTION("Xilinx uartlite serial driver");
-MODULE_LICENSE("GPL");