ar71xx: nuke 2.6.39 support

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@30404 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 0 insertions, 688 deletions

diff --git a/target/linux/ar71xx/files-2.6.39/drivers/tty/serial/ar933x_uart.c b/target/linux/ar71xx/files-2.6.39/drivers/tty/serial/ar933x_uart.c
deleted file mode 100644
index 6aca24f36..000000000
--- a/target/linux/ar71xx/files-2.6.39/drivers/tty/serial/ar933x_uart.c
+++ /dev/null
@@ -1,688 +0,0 @@
-/*
- *  Atheros AR933X SoC built-in UART driver
- *
- *  Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
- *
- *  Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
- *
- *  This program is free software; you can redistribute it and/or modify it
- *  under the terms of the GNU General Public License version 2 as published
- *  by the Free Software Foundation.
- */
-
-#include <linux/module.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/console.h>
-#include <linux/sysrq.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial_core.h>
-#include <linux/serial.h>
-#include <linux/slab.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-
-#include <asm/mach-ar71xx/ar933x_uart.h>
-#include <asm/mach-ar71xx/ar933x_uart_platform.h>
-
-#define DRIVER_NAME "ar933x-uart"
-
-#define AR933X_DUMMY_STATUS_RD	0x01
-
-static struct uart_driver ar933x_uart_driver;
-
-struct ar933x_uart_port {
-	struct uart_port	port;
-	unsigned int		ier;	/* shadow Interrupt Enable Register */
-};
-
-static inline unsigned int ar933x_uart_read(struct ar933x_uart_port *up,
-					    int offset)
-{
-	return readl(up->port.membase + offset);
-}
-
-static inline void ar933x_uart_write(struct ar933x_uart_port *up,
-				     int offset, unsigned int value)
-{
-	writel(value, up->port.membase + offset);
-}
-
-static inline void ar933x_uart_rmw(struct ar933x_uart_port *up,
-				  unsigned int offset,
-				  unsigned int mask,
-				  unsigned int val)
-{
-	unsigned int t;
-
-	t = ar933x_uart_read(up, offset);
-	t &= ~mask;
-	t |= val;
-	ar933x_uart_write(up, offset, t);
-}
-
-static inline void ar933x_uart_rmw_set(struct ar933x_uart_port *up,
-				       unsigned int offset,
-				       unsigned int val)
-{
-	ar933x_uart_rmw(up, offset, 0, val);
-}
-
-static inline void ar933x_uart_rmw_clear(struct ar933x_uart_port *up,
-					 unsigned int offset,
-					 unsigned int val)
-{
-	ar933x_uart_rmw(up, offset, val, 0);
-}
-
-static inline void ar933x_uart_start_tx_interrupt(struct ar933x_uart_port *up)
-{
-	up->ier |= AR933X_UART_INT_TX_EMPTY;
-	ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
-}
-
-static inline void ar933x_uart_stop_tx_interrupt(struct ar933x_uart_port *up)
-{
-	up->ier &= ~AR933X_UART_INT_TX_EMPTY;
-	ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
-}
-
-static inline void ar933x_uart_putc(struct ar933x_uart_port *up, int ch)
-{
-	unsigned int rdata;
-
-	rdata = ch & AR933X_UART_DATA_TX_RX_MASK;
-	rdata |= AR933X_UART_DATA_TX_CSR;
-	ar933x_uart_write(up, AR933X_UART_DATA_REG, rdata);
-}
-
-static unsigned int ar933x_uart_tx_empty(struct uart_port *port)
-{
-	struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
-	unsigned long flags;
-	unsigned int rdata;
-
-	spin_lock_irqsave(&up->port.lock, flags);
-	rdata = ar933x_uart_read(up, AR933X_UART_DATA_REG);
-	spin_unlock_irqrestore(&up->port.lock, flags);
-
-	return (rdata & AR933X_UART_DATA_TX_CSR) ? 0 : TIOCSER_TEMT;
-}
-
-static unsigned int ar933x_uart_get_mctrl(struct uart_port *port)
-{
-	return TIOCM_CAR;
-}
-
-static void ar933x_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
-}
-
-static void ar933x_uart_start_tx(struct uart_port *port)
-{
-	struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
-
-	ar933x_uart_start_tx_interrupt(up);
-}
-
-static void ar933x_uart_stop_tx(struct uart_port *port)
-{
-	struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
-
-	ar933x_uart_stop_tx_interrupt(up);
-}
-
-static void ar933x_uart_stop_rx(struct uart_port *port)
-{
-	struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
-
-	up->ier &= ~AR933X_UART_INT_RX_VALID;
-	ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
-}
-
-static void ar933x_uart_break_ctl(struct uart_port *port, int break_state)
-{
-	struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
-	unsigned long flags;
-
-	spin_lock_irqsave(&up->port.lock, flags);
-	if (break_state == -1)
-		ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
-				    AR933X_UART_CS_TX_BREAK);
-	else
-		ar933x_uart_rmw_clear(up, AR933X_UART_CS_REG,
-				      AR933X_UART_CS_TX_BREAK);
-	spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-static void ar933x_uart_enable_ms(struct uart_port *port)
-{
-}
-
-static void ar933x_uart_set_termios(struct uart_port *port,
-				    struct ktermios *new,
-				    struct ktermios *old)
-{
-	struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
-	unsigned int cs;
-	unsigned long flags;
-	unsigned int baud, scale;
-
-	/* Only CS8 is supported */
-	new->c_cflag &= ~CSIZE;
-	new->c_cflag |= CS8;
-
-	/* Only one stop bit is supported */
-	new->c_cflag &= ~CSTOPB;
-
-	cs = 0;
-	if (new->c_cflag & PARENB) {
-		if (!(new->c_cflag & PARODD))
-			cs |= AR933X_UART_CS_PARITY_EVEN;
-		else
-			cs |= AR933X_UART_CS_PARITY_ODD;
-	} else {
-		cs |= AR933X_UART_CS_PARITY_NONE;
-	}
-
-	/* Mark/space parity is not supported */
-	new->c_cflag &= ~CMSPAR;
-
-	baud = uart_get_baud_rate(port, new, old, 0, port->uartclk / 16);
-	scale = (port->uartclk / (16 * baud)) - 1;
-
-	/*
-	 * Ok, we're now changing the port state. Do it with
-	 * interrupts disabled.
-	 */
-	spin_lock_irqsave(&up->port.lock, flags);
-
-	/* Update the per-port timeout. */
-	uart_update_timeout(port, new->c_cflag, baud);
-
-	up->port.ignore_status_mask = 0;
-
-	/* ignore all characters if CREAD is not set */
-	if ((new->c_cflag & CREAD) == 0)
-		up->port.ignore_status_mask |= AR933X_DUMMY_STATUS_RD;
-
-	ar933x_uart_write(up, AR933X_UART_CLOCK_REG,
-			  scale << AR933X_UART_CLOCK_SCALE_S | 8192);
-
-	/* setup configuration register */
-	ar933x_uart_rmw(up, AR933X_UART_CS_REG, AR933X_UART_CS_PARITY_M, cs);
-
-	/* enable host interrupt */
-	ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
-			    AR933X_UART_CS_HOST_INT_EN);
-
-	spin_unlock_irqrestore(&up->port.lock, flags);
-
-	if (tty_termios_baud_rate(new))
-		tty_termios_encode_baud_rate(new, baud, baud);
-}
-
-static void ar933x_uart_rx_chars(struct ar933x_uart_port *up)
-{
-	struct tty_struct *tty;
-	int max_count = 256;
-
-	tty = tty_port_tty_get(&up->port.state->port);
-	do {
-		unsigned int rdata;
-		unsigned char ch;
-
-		rdata = ar933x_uart_read(up, AR933X_UART_DATA_REG);
-		if ((rdata & AR933X_UART_DATA_RX_CSR) == 0)
-			break;
-
-		/* remove the character from the FIFO */
-		ar933x_uart_write(up, AR933X_UART_DATA_REG,
-				  AR933X_UART_DATA_RX_CSR);
-
-		if (!tty) {
-			/* discard the data if no tty available */
-			continue;
-		}
-
-		up->port.icount.rx++;
-		ch = rdata & AR933X_UART_DATA_TX_RX_MASK;
-
-		if (uart_handle_sysrq_char(&up->port, ch))
-			continue;
-
-		if ((up->port.ignore_status_mask & AR933X_DUMMY_STATUS_RD) == 0)
-			tty_insert_flip_char(tty, ch, TTY_NORMAL);
-	} while (max_count-- > 0);
-
-	if (tty) {
-		tty_flip_buffer_push(tty);
-		tty_kref_put(tty);
-	}
-}
-
-static void ar933x_uart_tx_chars(struct ar933x_uart_port *up)
-{
-	struct circ_buf *xmit = &up->port.state->xmit;
-	int count;
-
-	if (uart_tx_stopped(&up->port))
-		return;
-
-	count = up->port.fifosize;
-	do {
-		unsigned int rdata;
-
-		rdata = ar933x_uart_read(up, AR933X_UART_DATA_REG);
-		if ((rdata & AR933X_UART_DATA_TX_CSR) == 0)
-			break;
-
-		if (up->port.x_char) {
-			ar933x_uart_putc(up, up->port.x_char);
-			up->port.icount.tx++;
-			up->port.x_char = 0;
-			continue;
-		}
-
-		if (uart_circ_empty(xmit))
-			break;
-
-		ar933x_uart_putc(up, xmit->buf[xmit->tail]);
-
-		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-		up->port.icount.tx++;
-	} while (--count > 0);
-
-	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(&up->port);
-
-	if (!uart_circ_empty(xmit))
-		ar933x_uart_start_tx_interrupt(up);
-}
-
-static irqreturn_t ar933x_uart_interrupt(int irq, void *dev_id)
-{
-	struct ar933x_uart_port *up = dev_id;
-	unsigned int status;
-
-	status = ar933x_uart_read(up, AR933X_UART_CS_REG);
-	if ((status & AR933X_UART_CS_HOST_INT) == 0)
-		return IRQ_NONE;
-
-	spin_lock(&up->port.lock);
-
-	status = ar933x_uart_read(up, AR933X_UART_INT_REG);
-	status &= ar933x_uart_read(up, AR933X_UART_INT_EN_REG);
-
-	if (status & AR933X_UART_INT_RX_VALID) {
-		ar933x_uart_write(up, AR933X_UART_INT_REG,
-				  AR933X_UART_INT_RX_VALID);
-		ar933x_uart_rx_chars(up);
-	}
-
-	if (status & AR933X_UART_INT_TX_EMPTY) {
-		ar933x_uart_write(up, AR933X_UART_INT_REG,
-				  AR933X_UART_INT_TX_EMPTY);
-		ar933x_uart_stop_tx_interrupt(up);
-		ar933x_uart_tx_chars(up);
-	}
-
-	spin_unlock(&up->port.lock);
-
-	return IRQ_HANDLED;
-}
-
-static int ar933x_uart_startup(struct uart_port *port)
-{
-	struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
-	unsigned long flags;
-	int ret;
-
-	ret = request_irq(up->port.irq, ar933x_uart_interrupt,
-			  up->port.irqflags, dev_name(up->port.dev), up);
-	if (ret)
-		return ret;
-
-	spin_lock_irqsave(&up->port.lock, flags);
-
-	/* Enable HOST interrupts */
-	ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
-			    AR933X_UART_CS_HOST_INT_EN);
-
-	/* Enable RX interrupts */
-	up->ier = AR933X_UART_INT_RX_VALID;
-	ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
-
-	spin_unlock_irqrestore(&up->port.lock, flags);
-
-	return 0;
-}
-
-static void ar933x_uart_shutdown(struct uart_port *port)
-{
-	struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
-
-	/* Disable all interrupts */
-	up->ier = 0;
-	ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
-
-	/* Disable break condition */
-	ar933x_uart_rmw_clear(up, AR933X_UART_CS_REG,
-			      AR933X_UART_CS_TX_BREAK);
-
-	free_irq(up->port.irq, up);
-}
-
-static const char *ar933x_uart_type(struct uart_port *port)
-{
-	return (port->type == PORT_AR933X) ? "AR933X UART" : NULL;
-}
-
-static void ar933x_uart_release_port(struct uart_port *port)
-{
-	/* Nothing to release ... */
-}
-
-static int ar933x_uart_request_port(struct uart_port *port)
-{
-	/* UARTs always present */
-	return 0;
-}
-
-static void ar933x_uart_config_port(struct uart_port *port, int flags)
-{
-	if (flags & UART_CONFIG_TYPE)
-		port->type = PORT_AR933X;
-}
-
-static int ar933x_uart_verify_port(struct uart_port *port,
-				   struct serial_struct *ser)
-{
-	if (ser->type != PORT_UNKNOWN &&
-	    ser->type != PORT_AR933X)
-		return -EINVAL;
-
-	if (ser->irq < 0 || ser->irq >= NR_IRQS)
-		return -EINVAL;
-
-	if (ser->baud_base < 28800)
-		return -EINVAL;
-
-	return 0;
-}
-
-static struct uart_ops ar933x_uart_ops = {
-	.tx_empty	= ar933x_uart_tx_empty,
-	.set_mctrl	= ar933x_uart_set_mctrl,
-	.get_mctrl	= ar933x_uart_get_mctrl,
-	.stop_tx	= ar933x_uart_stop_tx,
-	.start_tx	= ar933x_uart_start_tx,
-	.stop_rx	= ar933x_uart_stop_rx,
-	.enable_ms	= ar933x_uart_enable_ms,
-	.break_ctl	= ar933x_uart_break_ctl,
-	.startup	= ar933x_uart_startup,
-	.shutdown	= ar933x_uart_shutdown,
-	.set_termios	= ar933x_uart_set_termios,
-	.type		= ar933x_uart_type,
-	.release_port	= ar933x_uart_release_port,
-	.request_port	= ar933x_uart_request_port,
-	.config_port	= ar933x_uart_config_port,
-	.verify_port	= ar933x_uart_verify_port,
-};
-
-#ifdef CONFIG_SERIAL_AR933X_CONSOLE
-
-static struct ar933x_uart_port *
-ar933x_console_ports[CONFIG_SERIAL_AR933X_NR_UARTS];
-
-static void ar933x_uart_wait_xmitr(struct ar933x_uart_port *up)
-{
-	unsigned int status;
-	unsigned int timeout = 60000;
-
-	/* Wait up to 60ms for the character(s) to be sent. */
-	do {
-		status = ar933x_uart_read(up, AR933X_UART_DATA_REG);
-		if (--timeout == 0)
-			break;
-		udelay(1);
-	} while ((status & AR933X_UART_DATA_TX_CSR) == 0);
-}
-
-static void ar933x_uart_console_putchar(struct uart_port *port, int ch)
-{
-	struct ar933x_uart_port *up = (struct ar933x_uart_port *) port;
-
-	ar933x_uart_wait_xmitr(up);
-	ar933x_uart_putc(up, ch);
-}
-
-static void ar933x_uart_console_write(struct console *co, const char *s,
-				      unsigned int count)
-{
-	struct ar933x_uart_port *up = ar933x_console_ports[co->index];
-	unsigned long flags;
-	unsigned int int_en;
-	int locked = 1;
-
-	local_irq_save(flags);
-
-	if (up->port.sysrq)
-		locked = 0;
-	else if (oops_in_progress)
-		locked = spin_trylock(&up->port.lock);
-	else
-		spin_lock(&up->port.lock);
-
-	/*
-	 * First save the IER then disable the interrupts
-	 */
-	int_en = ar933x_uart_read(up, AR933X_UART_INT_EN_REG);
-	ar933x_uart_write(up, AR933X_UART_INT_EN_REG, 0);
-
-	uart_console_write(&up->port, s, count, ar933x_uart_console_putchar);
-
-	/*
-	 * Finally, wait for transmitter to become empty
-	 * and restore the IER
-	 */
-	ar933x_uart_wait_xmitr(up);
-	ar933x_uart_write(up, AR933X_UART_INT_EN_REG, int_en);
-
-	ar933x_uart_write(up, AR933X_UART_INT_REG, AR933X_UART_INT_ALLINTS);
-
-	if (locked)
-		spin_unlock(&up->port.lock);
-
-	local_irq_restore(flags);
-}
-
-static int ar933x_uart_console_setup(struct console *co, char *options)
-{
-	struct ar933x_uart_port *up;
-	int baud = 115200;
-	int bits = 8;
-	int parity = 'n';
-	int flow = 'n';
-
-	if (co->index < 0 || co->index >= CONFIG_SERIAL_AR933X_NR_UARTS)
-		return -EINVAL;
-
-	up = ar933x_console_ports[co->index];
-	if (!up)
-		return -ENODEV;
-
-	if (options)
-		uart_parse_options(options, &baud, &parity, &bits, &flow);
-
-	return uart_set_options(&up->port, co, baud, parity, bits, flow);
-}
-
-static struct console ar933x_uart_console = {
-	.name		= "ttyATH",
-	.write		= ar933x_uart_console_write,
-	.device		= uart_console_device,
-	.setup		= ar933x_uart_console_setup,
-	.flags		= CON_PRINTBUFFER,
-	.index		= -1,
-	.data		= &ar933x_uart_driver,
-};
-
-static void ar933x_uart_add_console_port(struct ar933x_uart_port *up)
-{
-	ar933x_console_ports[up->port.line] = up;
-}
-
-#define AR933X_SERIAL_CONSOLE	(&ar933x_uart_console)
-
-#else
-
-static inline void ar933x_uart_add_console_port(struct ar933x_uart_port *up) {}
-
-#define AR933X_SERIAL_CONSOLE	NULL
-
-#endif /* CONFIG_SERIAL_AR933X_CONSOLE */
-
-static struct uart_driver ar933x_uart_driver = {
-	.owner		= THIS_MODULE,
-	.driver_name	= DRIVER_NAME,
-	.dev_name	= "ttyATH",
-	.nr		= CONFIG_SERIAL_AR933X_NR_UARTS,
-	.cons		= AR933X_SERIAL_CONSOLE,
-};
-
-static int __devinit ar933x_uart_probe(struct platform_device *pdev)
-{
-	struct ar933x_uart_platform_data *pdata;
-	struct ar933x_uart_port *up;
-	struct uart_port *port;
-	struct resource *mem_res;
-	struct resource *irq_res;
-	int id;
-	int ret;
-
-	pdata = pdev->dev.platform_data;
-	if (!pdata)
-		return -EINVAL;
-
-	id = pdev->id;
-	if (id == -1)
-		id = 0;
-
-	if (id > CONFIG_SERIAL_AR933X_NR_UARTS)
-		return -EINVAL;
-
-	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!mem_res) {
-		dev_err(&pdev->dev, "no MEM resource\n");
-		return -EINVAL;
-	}
-
-	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!irq_res) {
-		dev_err(&pdev->dev, "no IRQ resource\n");
-		return -EINVAL;
-	}
-
-	up = kzalloc(sizeof(struct ar933x_uart_port), GFP_KERNEL);
-	if (!up)
-		return -ENOMEM;
-
-	port = &up->port;
-	port->mapbase = mem_res->start;
-
-	port->membase = ioremap(mem_res->start, AR933X_UART_REGS_SIZE);
-	if (!port->membase) {
-		ret = -ENOMEM;
-		goto err_free_up;
-	}
-
-	port->line = id;
-	port->irq = irq_res->start;
-	port->dev = &pdev->dev;
-	port->type = PORT_AR933X;
-	port->iotype = UPIO_MEM32;
-	port->uartclk = pdata->uartclk;
-
-	port->regshift = 2;
-	port->fifosize = AR933X_UART_FIFO_SIZE;
-	port->ops = &ar933x_uart_ops;
-
-	ar933x_uart_add_console_port(up);
-
-	ret = uart_add_one_port(&ar933x_uart_driver, &up->port);
-	if (ret)
-		goto err_unmap;
-
-	platform_set_drvdata(pdev, up);
-	return 0;
-
-err_unmap:
-	iounmap(up->port.membase);
-err_free_up:
-	kfree(up);
-	return ret;
-}
-
-static int __devexit ar933x_uart_remove(struct platform_device *pdev)
-{
-	struct ar933x_uart_port *up;
-
-	up = platform_get_drvdata(pdev);
-	platform_set_drvdata(pdev, NULL);
-
-	if (up) {
-		uart_remove_one_port(&ar933x_uart_driver, &up->port);
-		iounmap(up->port.membase);
-		kfree(up);
-	}
-
-	return 0;
-}
-
-static struct platform_driver ar933x_uart_platform_driver = {
-	.probe		= ar933x_uart_probe,
-	.remove		= __devexit_p(ar933x_uart_remove),
-	.driver		= {
-		.name		= DRIVER_NAME,
-		.owner		= THIS_MODULE,
-	},
-};
-
-static int __init ar933x_uart_init(void)
-{
-	int ret;
-
-	ar933x_uart_driver.nr = CONFIG_SERIAL_AR933X_NR_UARTS;
-	ret = uart_register_driver(&ar933x_uart_driver);
-	if (ret)
-		goto err_out;
-
-	ret = platform_driver_register(&ar933x_uart_platform_driver);
-	if (ret)
-		goto err_unregister_uart_driver;
-
-	return 0;
-
-err_unregister_uart_driver:
-	uart_unregister_driver(&ar933x_uart_driver);
-err_out:
-	return ret;
-}
-
-static void __exit ar933x_uart_exit(void)
-{
-	platform_driver_unregister(&ar933x_uart_platform_driver);
-	uart_unregister_driver(&ar933x_uart_driver);
-}
-
-module_init(ar933x_uart_init);
-module_exit(ar933x_uart_exit);
-
-MODULE_DESCRIPTION("Atheros AR933X UART driver");
-MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:" DRIVER_NAME);