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, 608 deletions

diff --git a/drivers/serial/altera_uart.c b/drivers/serial/altera_uart.c
deleted file mode 100644
index 721216292a50..000000000000
--- a/drivers/serial/altera_uart.c
+++ /dev/null
@@ -1,608 +0,0 @@
-/*
- * altera_uart.c -- Altera UART driver
- *
- * Based on mcf.c -- Freescale ColdFire UART driver
- *
- * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com>
- * (C) Copyright 2008, Thomas Chou <thomas@wytron.com.tw>
- * (C) Copyright 2010, Tobias Klauser <tklauser@distanz.ch>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/console.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/serial_core.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/altera_uart.h>
-
-#define DRV_NAME "altera_uart"
-#define SERIAL_ALTERA_MAJOR 204
-#define SERIAL_ALTERA_MINOR 213
-
-/*
- * Altera UART register definitions according to the Nios UART datasheet:
- * http://www.altera.com/literature/ds/ds_nios_uart.pdf
- */
-
-#define ALTERA_UART_SIZE		32
-
-#define ALTERA_UART_RXDATA_REG		0
-#define ALTERA_UART_TXDATA_REG		4
-#define ALTERA_UART_STATUS_REG		8
-#define ALTERA_UART_CONTROL_REG		12
-#define ALTERA_UART_DIVISOR_REG		16
-#define ALTERA_UART_EOP_REG		20
-
-#define ALTERA_UART_STATUS_PE_MSK	0x0001	/* parity error */
-#define ALTERA_UART_STATUS_FE_MSK	0x0002	/* framing error */
-#define ALTERA_UART_STATUS_BRK_MSK	0x0004	/* break */
-#define ALTERA_UART_STATUS_ROE_MSK	0x0008	/* RX overrun error */
-#define ALTERA_UART_STATUS_TOE_MSK	0x0010	/* TX overrun error */
-#define ALTERA_UART_STATUS_TMT_MSK	0x0020	/* TX shift register state */
-#define ALTERA_UART_STATUS_TRDY_MSK	0x0040	/* TX ready */
-#define ALTERA_UART_STATUS_RRDY_MSK	0x0080	/* RX ready */
-#define ALTERA_UART_STATUS_E_MSK	0x0100	/* exception condition */
-#define ALTERA_UART_STATUS_DCTS_MSK	0x0400	/* CTS logic-level change */
-#define ALTERA_UART_STATUS_CTS_MSK	0x0800	/* CTS logic state */
-#define ALTERA_UART_STATUS_EOP_MSK	0x1000	/* EOP written/read */
-
-						/* Enable interrupt on... */
-#define ALTERA_UART_CONTROL_PE_MSK	0x0001	/* ...parity error */
-#define ALTERA_UART_CONTROL_FE_MSK	0x0002	/* ...framing error */
-#define ALTERA_UART_CONTROL_BRK_MSK	0x0004	/* ...break */
-#define ALTERA_UART_CONTROL_ROE_MSK	0x0008	/* ...RX overrun */
-#define ALTERA_UART_CONTROL_TOE_MSK	0x0010	/* ...TX overrun */
-#define ALTERA_UART_CONTROL_TMT_MSK	0x0020	/* ...TX shift register empty */
-#define ALTERA_UART_CONTROL_TRDY_MSK	0x0040	/* ...TX ready */
-#define ALTERA_UART_CONTROL_RRDY_MSK	0x0080	/* ...RX ready */
-#define ALTERA_UART_CONTROL_E_MSK	0x0100	/* ...exception*/
-
-#define ALTERA_UART_CONTROL_TRBK_MSK	0x0200	/* TX break */
-#define ALTERA_UART_CONTROL_DCTS_MSK	0x0400	/* Interrupt on CTS change */
-#define ALTERA_UART_CONTROL_RTS_MSK	0x0800	/* RTS signal */
-#define ALTERA_UART_CONTROL_EOP_MSK	0x1000	/* Interrupt on EOP */
-
-/*
- * Local per-uart structure.
- */
-struct altera_uart {
-	struct uart_port port;
-	struct timer_list tmr;
-	unsigned int sigs;	/* Local copy of line sigs */
-	unsigned short imr;	/* Local IMR mirror */
-};
-
-static u32 altera_uart_readl(struct uart_port *port, int reg)
-{
-	struct altera_uart_platform_uart *platp = port->private_data;
-
-	return readl(port->membase + (reg << platp->bus_shift));
-}
-
-static void altera_uart_writel(struct uart_port *port, u32 dat, int reg)
-{
-	struct altera_uart_platform_uart *platp = port->private_data;
-
-	writel(dat, port->membase + (reg << platp->bus_shift));
-}
-
-static unsigned int altera_uart_tx_empty(struct uart_port *port)
-{
-	return (altera_uart_readl(port, ALTERA_UART_STATUS_REG) &
-		ALTERA_UART_STATUS_TMT_MSK) ? TIOCSER_TEMT : 0;
-}
-
-static unsigned int altera_uart_get_mctrl(struct uart_port *port)
-{
-	struct altera_uart *pp = container_of(port, struct altera_uart, port);
-	unsigned int sigs;
-
-	sigs = (altera_uart_readl(port, ALTERA_UART_STATUS_REG) &
-	     ALTERA_UART_STATUS_CTS_MSK) ? TIOCM_CTS : 0;
-	sigs |= (pp->sigs & TIOCM_RTS);
-
-	return sigs;
-}
-
-static void altera_uart_set_mctrl(struct uart_port *port, unsigned int sigs)
-{
-	struct altera_uart *pp = container_of(port, struct altera_uart, port);
-
-	pp->sigs = sigs;
-	if (sigs & TIOCM_RTS)
-		pp->imr |= ALTERA_UART_CONTROL_RTS_MSK;
-	else
-		pp->imr &= ~ALTERA_UART_CONTROL_RTS_MSK;
-	altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG);
-}
-
-static void altera_uart_start_tx(struct uart_port *port)
-{
-	struct altera_uart *pp = container_of(port, struct altera_uart, port);
-
-	pp->imr |= ALTERA_UART_CONTROL_TRDY_MSK;
-	altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG);
-}
-
-static void altera_uart_stop_tx(struct uart_port *port)
-{
-	struct altera_uart *pp = container_of(port, struct altera_uart, port);
-
-	pp->imr &= ~ALTERA_UART_CONTROL_TRDY_MSK;
-	altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG);
-}
-
-static void altera_uart_stop_rx(struct uart_port *port)
-{
-	struct altera_uart *pp = container_of(port, struct altera_uart, port);
-
-	pp->imr &= ~ALTERA_UART_CONTROL_RRDY_MSK;
-	altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG);
-}
-
-static void altera_uart_break_ctl(struct uart_port *port, int break_state)
-{
-	struct altera_uart *pp = container_of(port, struct altera_uart, port);
-	unsigned long flags;
-
-	spin_lock_irqsave(&port->lock, flags);
-	if (break_state == -1)
-		pp->imr |= ALTERA_UART_CONTROL_TRBK_MSK;
-	else
-		pp->imr &= ~ALTERA_UART_CONTROL_TRBK_MSK;
-	altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG);
-	spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static void altera_uart_enable_ms(struct uart_port *port)
-{
-}
-
-static void altera_uart_set_termios(struct uart_port *port,
-				    struct ktermios *termios,
-				    struct ktermios *old)
-{
-	unsigned long flags;
-	unsigned int baud, baudclk;
-
-	baud = uart_get_baud_rate(port, termios, old, 0, 4000000);
-	baudclk = port->uartclk / baud;
-
-	if (old)
-		tty_termios_copy_hw(termios, old);
-	tty_termios_encode_baud_rate(termios, baud, baud);
-
-	spin_lock_irqsave(&port->lock, flags);
-	uart_update_timeout(port, termios->c_cflag, baud);
-	altera_uart_writel(port, baudclk, ALTERA_UART_DIVISOR_REG);
-	spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static void altera_uart_rx_chars(struct altera_uart *pp)
-{
-	struct uart_port *port = &pp->port;
-	unsigned char ch, flag;
-	unsigned short status;
-
-	while ((status = altera_uart_readl(port, ALTERA_UART_STATUS_REG)) &
-	       ALTERA_UART_STATUS_RRDY_MSK) {
-		ch = altera_uart_readl(port, ALTERA_UART_RXDATA_REG);
-		flag = TTY_NORMAL;
-		port->icount.rx++;
-
-		if (status & ALTERA_UART_STATUS_E_MSK) {
-			altera_uart_writel(port, status,
-					   ALTERA_UART_STATUS_REG);
-
-			if (status & ALTERA_UART_STATUS_BRK_MSK) {
-				port->icount.brk++;
-				if (uart_handle_break(port))
-					continue;
-			} else if (status & ALTERA_UART_STATUS_PE_MSK) {
-				port->icount.parity++;
-			} else if (status & ALTERA_UART_STATUS_ROE_MSK) {
-				port->icount.overrun++;
-			} else if (status & ALTERA_UART_STATUS_FE_MSK) {
-				port->icount.frame++;
-			}
-
-			status &= port->read_status_mask;
-
-			if (status & ALTERA_UART_STATUS_BRK_MSK)
-				flag = TTY_BREAK;
-			else if (status & ALTERA_UART_STATUS_PE_MSK)
-				flag = TTY_PARITY;
-			else if (status & ALTERA_UART_STATUS_FE_MSK)
-				flag = TTY_FRAME;
-		}
-
-		if (uart_handle_sysrq_char(port, ch))
-			continue;
-		uart_insert_char(port, status, ALTERA_UART_STATUS_ROE_MSK, ch,
-				 flag);
-	}
-
-	tty_flip_buffer_push(port->state->port.tty);
-}
-
-static void altera_uart_tx_chars(struct altera_uart *pp)
-{
-	struct uart_port *port = &pp->port;
-	struct circ_buf *xmit = &port->state->xmit;
-
-	if (port->x_char) {
-		/* Send special char - probably flow control */
-		altera_uart_writel(port, port->x_char, ALTERA_UART_TXDATA_REG);
-		port->x_char = 0;
-		port->icount.tx++;
-		return;
-	}
-
-	while (altera_uart_readl(port, ALTERA_UART_STATUS_REG) &
-	       ALTERA_UART_STATUS_TRDY_MSK) {
-		if (xmit->head == xmit->tail)
-			break;
-		altera_uart_writel(port, xmit->buf[xmit->tail],
-		       ALTERA_UART_TXDATA_REG);
-		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-		port->icount.tx++;
-	}
-
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(port);
-
-	if (xmit->head == xmit->tail) {
-		pp->imr &= ~ALTERA_UART_CONTROL_TRDY_MSK;
-		altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG);
-	}
-}
-
-static irqreturn_t altera_uart_interrupt(int irq, void *data)
-{
-	struct uart_port *port = data;
-	struct altera_uart *pp = container_of(port, struct altera_uart, port);
-	unsigned int isr;
-
-	isr = altera_uart_readl(port, ALTERA_UART_STATUS_REG) & pp->imr;
-
-	spin_lock(&port->lock);
-	if (isr & ALTERA_UART_STATUS_RRDY_MSK)
-		altera_uart_rx_chars(pp);
-	if (isr & ALTERA_UART_STATUS_TRDY_MSK)
-		altera_uart_tx_chars(pp);
-	spin_unlock(&port->lock);
-
-	return IRQ_RETVAL(isr);
-}
-
-static void altera_uart_timer(unsigned long data)
-{
-	struct uart_port *port = (void *)data;
-	struct altera_uart *pp = container_of(port, struct altera_uart, port);
-
-	altera_uart_interrupt(0, port);
-	mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port));
-}
-
-static void altera_uart_config_port(struct uart_port *port, int flags)
-{
-	port->type = PORT_ALTERA_UART;
-
-	/* Clear mask, so no surprise interrupts. */
-	altera_uart_writel(port, 0, ALTERA_UART_CONTROL_REG);
-	/* Clear status register */
-	altera_uart_writel(port, 0, ALTERA_UART_STATUS_REG);
-}
-
-static int altera_uart_startup(struct uart_port *port)
-{
-	struct altera_uart *pp = container_of(port, struct altera_uart, port);
-	unsigned long flags;
-	int ret;
-
-	if (!port->irq) {
-		setup_timer(&pp->tmr, altera_uart_timer, (unsigned long)port);
-		mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port));
-		return 0;
-	}
-
-	ret = request_irq(port->irq, altera_uart_interrupt, IRQF_DISABLED,
-			DRV_NAME, port);
-	if (ret) {
-		pr_err(DRV_NAME ": unable to attach Altera UART %d "
-		       "interrupt vector=%d\n", port->line, port->irq);
-		return ret;
-	}
-
-	spin_lock_irqsave(&port->lock, flags);
-
-	/* Enable RX interrupts now */
-	pp->imr = ALTERA_UART_CONTROL_RRDY_MSK;
-	writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG);
-
-	spin_unlock_irqrestore(&port->lock, flags);
-
-	return 0;
-}
-
-static void altera_uart_shutdown(struct uart_port *port)
-{
-	struct altera_uart *pp = container_of(port, struct altera_uart, port);
-	unsigned long flags;
-
-	spin_lock_irqsave(&port->lock, flags);
-
-	/* Disable all interrupts now */
-	pp->imr = 0;
-	writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG);
-
-	spin_unlock_irqrestore(&port->lock, flags);
-
-	if (port->irq)
-		free_irq(port->irq, port);
-	else
-		del_timer_sync(&pp->tmr);
-}
-
-static const char *altera_uart_type(struct uart_port *port)
-{
-	return (port->type == PORT_ALTERA_UART) ? "Altera UART" : NULL;
-}
-
-static int altera_uart_request_port(struct uart_port *port)
-{
-	/* UARTs always present */
-	return 0;
-}
-
-static void altera_uart_release_port(struct uart_port *port)
-{
-	/* Nothing to release... */
-}
-
-static int altera_uart_verify_port(struct uart_port *port,
-				   struct serial_struct *ser)
-{
-	if ((ser->type != PORT_UNKNOWN) && (ser->type != PORT_ALTERA_UART))
-		return -EINVAL;
-	return 0;
-}
-
-/*
- *	Define the basic serial functions we support.
- */
-static struct uart_ops altera_uart_ops = {
-	.tx_empty	= altera_uart_tx_empty,
-	.get_mctrl	= altera_uart_get_mctrl,
-	.set_mctrl	= altera_uart_set_mctrl,
-	.start_tx	= altera_uart_start_tx,
-	.stop_tx	= altera_uart_stop_tx,
-	.stop_rx	= altera_uart_stop_rx,
-	.enable_ms	= altera_uart_enable_ms,
-	.break_ctl	= altera_uart_break_ctl,
-	.startup	= altera_uart_startup,
-	.shutdown	= altera_uart_shutdown,
-	.set_termios	= altera_uart_set_termios,
-	.type		= altera_uart_type,
-	.request_port	= altera_uart_request_port,
-	.release_port	= altera_uart_release_port,
-	.config_port	= altera_uart_config_port,
-	.verify_port	= altera_uart_verify_port,
-};
-
-static struct altera_uart altera_uart_ports[CONFIG_SERIAL_ALTERA_UART_MAXPORTS];
-
-#if defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE)
-
-int __init early_altera_uart_setup(struct altera_uart_platform_uart *platp)
-{
-	struct uart_port *port;
-	int i;
-
-	for (i = 0; i < CONFIG_SERIAL_ALTERA_UART_MAXPORTS && platp[i].mapbase; i++) {
-		port = &altera_uart_ports[i].port;
-
-		port->line = i;
-		port->type = PORT_ALTERA_UART;
-		port->mapbase = platp[i].mapbase;
-		port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE);
-		port->iotype = SERIAL_IO_MEM;
-		port->irq = platp[i].irq;
-		port->uartclk = platp[i].uartclk;
-		port->flags = UPF_BOOT_AUTOCONF;
-		port->ops = &altera_uart_ops;
-		port->private_data = platp;
-	}
-
-	return 0;
-}
-
-static void altera_uart_console_putc(struct uart_port *port, const char c)
-{
-	while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &
-		 ALTERA_UART_STATUS_TRDY_MSK))
-		cpu_relax();
-
-	writel(c, port->membase + ALTERA_UART_TXDATA_REG);
-}
-
-static void altera_uart_console_write(struct console *co, const char *s,
-				      unsigned int count)
-{
-	struct uart_port *port = &(altera_uart_ports + co->index)->port;
-
-	for (; count; count--, s++) {
-		altera_uart_console_putc(port, *s);
-		if (*s == '\n')
-			altera_uart_console_putc(port, '\r');
-	}
-}
-
-static int __init altera_uart_console_setup(struct console *co, char *options)
-{
-	struct uart_port *port;
-	int baud = CONFIG_SERIAL_ALTERA_UART_BAUDRATE;
-	int bits = 8;
-	int parity = 'n';
-	int flow = 'n';
-
-	if (co->index < 0 || co->index >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS)
-		return -EINVAL;
-	port = &altera_uart_ports[co->index].port;
-	if (!port->membase)
-		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 altera_uart_driver;
-
-static struct console altera_uart_console = {
-	.name	= "ttyAL",
-	.write	= altera_uart_console_write,
-	.device	= uart_console_device,
-	.setup	= altera_uart_console_setup,
-	.flags	= CON_PRINTBUFFER,
-	.index	= -1,
-	.data	= &altera_uart_driver,
-};
-
-static int __init altera_uart_console_init(void)
-{
-	register_console(&altera_uart_console);
-	return 0;
-}
-
-console_initcall(altera_uart_console_init);
-
-#define	ALTERA_UART_CONSOLE	(&altera_uart_console)
-
-#else
-
-#define	ALTERA_UART_CONSOLE	NULL
-
-#endif /* CONFIG_ALTERA_UART_CONSOLE */
-
-/*
- *	Define the altera_uart UART driver structure.
- */
-static struct uart_driver altera_uart_driver = {
-	.owner		= THIS_MODULE,
-	.driver_name	= DRV_NAME,
-	.dev_name	= "ttyAL",
-	.major		= SERIAL_ALTERA_MAJOR,
-	.minor		= SERIAL_ALTERA_MINOR,
-	.nr		= CONFIG_SERIAL_ALTERA_UART_MAXPORTS,
-	.cons		= ALTERA_UART_CONSOLE,
-};
-
-static int __devinit altera_uart_probe(struct platform_device *pdev)
-{
-	struct altera_uart_platform_uart *platp = pdev->dev.platform_data;
-	struct uart_port *port;
-	struct resource *res_mem;
-	struct resource *res_irq;
-	int i = pdev->id;
-
-	/* -1 emphasizes that the platform must have one port, no .N suffix */
-	if (i == -1)
-		i = 0;
-
-	if (i >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS)
-		return -EINVAL;
-
-	port = &altera_uart_ports[i].port;
-
-	res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (res_mem)
-		port->mapbase = res_mem->start;
-	else if (platp->mapbase)
-		port->mapbase = platp->mapbase;
-	else
-		return -EINVAL;
-
-	res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (res_irq)
-		port->irq = res_irq->start;
-	else if (platp->irq)
-		port->irq = platp->irq;
-
-	port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE);
-	if (!port->membase)
-		return -ENOMEM;
-
-	port->line = i;
-	port->type = PORT_ALTERA_UART;
-	port->iotype = SERIAL_IO_MEM;
-	port->uartclk = platp->uartclk;
-	port->ops = &altera_uart_ops;
-	port->flags = UPF_BOOT_AUTOCONF;
-	port->private_data = platp;
-
-	uart_add_one_port(&altera_uart_driver, port);
-
-	return 0;
-}
-
-static int __devexit altera_uart_remove(struct platform_device *pdev)
-{
-	struct uart_port *port = &altera_uart_ports[pdev->id].port;
-
-	uart_remove_one_port(&altera_uart_driver, port);
-	return 0;
-}
-
-static struct platform_driver altera_uart_platform_driver = {
-	.probe	= altera_uart_probe,
-	.remove	= __devexit_p(altera_uart_remove),
-	.driver	= {
-		.name	= DRV_NAME,
-		.owner	= THIS_MODULE,
-		.pm	= NULL,
-	},
-};
-
-static int __init altera_uart_init(void)
-{
-	int rc;
-
-	rc = uart_register_driver(&altera_uart_driver);
-	if (rc)
-		return rc;
-	rc = platform_driver_register(&altera_uart_platform_driver);
-	if (rc) {
-		uart_unregister_driver(&altera_uart_driver);
-		return rc;
-	}
-	return 0;
-}
-
-static void __exit altera_uart_exit(void)
-{
-	platform_driver_unregister(&altera_uart_platform_driver);
-	uart_unregister_driver(&altera_uart_driver);
-}
-
-module_init(altera_uart_init);
-module_exit(altera_uart_exit);
-
-MODULE_DESCRIPTION("Altera UART driver");
-MODULE_AUTHOR("Thomas Chou <thomas@wytron.com.tw>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:" DRV_NAME);
-MODULE_ALIAS_CHARDEV_MAJOR(SERIAL_ALTERA_MAJOR);