1 files changed, 0 insertions, 559 deletions

diff --git a/target/linux/ramips/files-3.7/drivers/spi/spi-ramips.c b/target/linux/ramips/files-3.7/drivers/spi/spi-ramips.c
deleted file mode 100644
index d2ceaf3b8..000000000
--- a/target/linux/ramips/files-3.7/drivers/spi/spi-ramips.c
+++ /dev/null
@@ -1,559 +0,0 @@
-/*
- * ramips_spi.c -- Ralink RT288x/RT305x SPI controller driver
- *
- * Copyright (C) 2011 Sergiy <piratfm@gmail.com>
- * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
- *
- * 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/init.h>
-#include <linux/module.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
-#include <linux/spi/spi.h>
-
-#define DRIVER_NAME			"ramips-spi"
-#define RALINK_NUM_CHIPSELECTS		1 /* only one slave is supported*/
-#define RALINK_SPI_WAIT_RDY_MAX_LOOP	2000 /* in usec */
-
-#define RAMIPS_SPI_STAT			0x00
-#define RAMIPS_SPI_CFG			0x10
-#define RAMIPS_SPI_CTL			0x14
-#define RAMIPS_SPI_DATA			0x20
-
-/* SPISTAT register bit field */
-#define SPISTAT_BUSY			BIT(0)
-
-/* SPICFG register bit field */
-#define SPICFG_LSBFIRST			0
-#define SPICFG_MSBFIRST			BIT(8)
-#define SPICFG_SPICLKPOL		BIT(6)
-#define SPICFG_RXCLKEDGE_FALLING	BIT(5)
-#define SPICFG_TXCLKEDGE_FALLING	BIT(4)
-#define SPICFG_SPICLK_PRESCALE_MASK	0x7
-#define SPICFG_SPICLK_DIV2		0
-#define SPICFG_SPICLK_DIV4		1
-#define SPICFG_SPICLK_DIV8		2
-#define SPICFG_SPICLK_DIV16		3
-#define SPICFG_SPICLK_DIV32		4
-#define SPICFG_SPICLK_DIV64		5
-#define SPICFG_SPICLK_DIV128		6
-#define SPICFG_SPICLK_DISABLE		7
-
-/* SPICTL register bit field */
-#define SPICTL_HIZSDO			BIT(3)
-#define SPICTL_STARTWR			BIT(2)
-#define SPICTL_STARTRD			BIT(1)
-#define SPICTL_SPIENA			BIT(0)
-
-#ifdef DEBUG
-#define spi_debug(args...) printk(args)
-#else
-#define spi_debug(args...)
-#endif
-
-struct ramips_spi {
-	struct work_struct	work;
-
-	/* Lock access to transfer list.*/
-	spinlock_t		lock;
-
-	struct list_head	msg_queue;
-	struct spi_master	*master;
-	void __iomem		*base;
-	unsigned int		sys_freq;
-	unsigned int		speed;
-
-	struct clk		*clk;
-};
-
-static struct workqueue_struct *ramips_spi_wq;
-
-static inline struct ramips_spi *ramips_spidev_to_rs(struct spi_device *spi)
-{
-	return spi_master_get_devdata(spi->master);
-}
-
-static inline u32 ramips_spi_read(struct ramips_spi *rs, u32 reg)
-{
-	return ioread32(rs->base + reg);
-}
-
-static inline void ramips_spi_write(struct ramips_spi *rs, u32 reg, u32 val)
-{
-	iowrite32(val, rs->base + reg);
-}
-
-static inline void ramips_spi_setbits(struct ramips_spi *rs, u32 reg, u32 mask)
-{
-	void __iomem *addr = rs->base + reg;
-	u32 val;
-
-	val = ioread32(addr);
-	val |= mask;
-	iowrite32(val, addr);
-}
-
-static inline void ramips_spi_clrbits(struct ramips_spi *rs, u32 reg, u32 mask)
-{
-	void __iomem *addr = rs->base + reg;
-	u32 val;
-
-	val = ioread32(addr);
-	val &= ~mask;
-	iowrite32(val, addr);
-}
-
-static int ramips_spi_baudrate_set(struct spi_device *spi, unsigned int speed)
-{
-	struct ramips_spi *rs = ramips_spidev_to_rs(spi);
-	u32 rate;
-	u32 prescale;
-	u32 reg;
-
-	spi_debug("%s: speed:%u\n", __func__, speed);
-
-	/*
-	 * the supported rates are: 2,4,8...128
-	 * round up as we look for equal or less speed
-	 */
-	rate = DIV_ROUND_UP(rs->sys_freq, speed);
-	spi_debug("%s: rate-1:%u\n", __func__, rate);
-	rate = roundup_pow_of_two(rate);
-	spi_debug("%s: rate-2:%u\n", __func__, rate);
-
-	/* check if requested speed is too small */
-	if (rate > 128)
-		return -EINVAL;
-
-	if (rate < 2)
-		rate = 2;
-
-	/* Convert the rate to SPI clock divisor value.	*/
-	prescale = ilog2(rate/2);
-	spi_debug("%s: prescale:%u\n", __func__, prescale);
-
-	reg = ramips_spi_read(rs, RAMIPS_SPI_CFG);
-	reg = ((reg & ~SPICFG_SPICLK_PRESCALE_MASK) | prescale);
-	ramips_spi_write(rs, RAMIPS_SPI_CFG, reg);
-	rs->speed = speed;
-	return 0;
-}
-
-/*
- * called only when no transfer is active on the bus
- */
-static int
-ramips_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
-{
-	struct ramips_spi *rs = ramips_spidev_to_rs(spi);
-	unsigned int speed = spi->max_speed_hz;
-	int	rc;
-	unsigned int bits_per_word = 8;
-
-	if ((t != NULL) && t->speed_hz)
-		speed = t->speed_hz;
-
-	if ((t != NULL) && t->bits_per_word)
-		bits_per_word = t->bits_per_word;
-
-	if (rs->speed != speed) {
-		spi_debug("%s: speed_hz:%u\n", __func__, speed);
-		rc = ramips_spi_baudrate_set(spi, speed);
-		if (rc)
-			return rc;
-	}
-
-	if (bits_per_word != 8) {
-		spi_debug("%s: bad bits_per_word: %u\n", __func__,
-			  bits_per_word);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static void ramips_spi_set_cs(struct ramips_spi *rs, int enable)
-{
-	if (enable)
-		ramips_spi_clrbits(rs, RAMIPS_SPI_CTL, SPICTL_SPIENA);
-	else
-		ramips_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_SPIENA);
-}
-
-static inline int ramips_spi_wait_till_ready(struct ramips_spi *rs)
-{
-	int i;
-
-	for (i = 0; i < RALINK_SPI_WAIT_RDY_MAX_LOOP; i++) {
-		u32 status;
-
-		status = ramips_spi_read(rs, RAMIPS_SPI_STAT);
-		if ((status & SPISTAT_BUSY) == 0)
-			return 0;
-
-		udelay(1);
-	}
-
-	return -ETIMEDOUT;
-}
-
-static unsigned int
-ramips_spi_write_read(struct spi_device *spi, struct spi_transfer *xfer)
-{
-	struct ramips_spi *rs = ramips_spidev_to_rs(spi);
-	unsigned count = 0;
-	u8 *rx = xfer->rx_buf;
-	const u8 *tx = xfer->tx_buf;
-	int err;
-
-	spi_debug("%s(%d): %s %s\n", __func__, xfer->len,
-		  (tx != NULL) ? "tx" : "  ",
-		  (rx != NULL) ? "rx" : "  ");
-
-	if (tx) {
-		for (count = 0; count < xfer->len; count++) {
-			ramips_spi_write(rs, RAMIPS_SPI_DATA, tx[count]);
-			ramips_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_STARTWR);
-			err = ramips_spi_wait_till_ready(rs);
-			if (err) {
-				dev_err(&spi->dev, "TX failed, err=%d\n", err);
-				goto out;
-			}
-		}
-	}
-
-	if (rx) {
-		for (count = 0; count < xfer->len; count++) {
-			ramips_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_STARTRD);
-			err = ramips_spi_wait_till_ready(rs);
-			if (err) {
-				dev_err(&spi->dev, "RX failed, err=%d\n", err);
-				goto out;
-			}
-			rx[count] = (u8) ramips_spi_read(rs, RAMIPS_SPI_DATA);
-		}
-	}
-
-out:
-	return count;
-}
-
-static void ramips_spi_work(struct work_struct *work)
-{
-	struct ramips_spi *rs =
-		container_of(work, struct ramips_spi, work);
-
-	spin_lock_irq(&rs->lock);
-	while (!list_empty(&rs->msg_queue)) {
-		struct spi_message *m;
-		struct spi_device *spi;
-		struct spi_transfer *t = NULL;
-		int par_override = 0;
-		int status = 0;
-		int cs_active = 0;
-
-		m = container_of(rs->msg_queue.next, struct spi_message,
-				 queue);
-
-		list_del_init(&m->queue);
-		spin_unlock_irq(&rs->lock);
-
-		spi = m->spi;
-
-		/* Load defaults */
-		status = ramips_spi_setup_transfer(spi, NULL);
-
-		if (status < 0)
-			goto msg_done;
-
-		list_for_each_entry(t, &m->transfers, transfer_list) {
-			if (par_override || t->speed_hz || t->bits_per_word) {
-				par_override = 1;
-				status = ramips_spi_setup_transfer(spi, t);
-				if (status < 0)
-					break;
-				if (!t->speed_hz && !t->bits_per_word)
-					par_override = 0;
-			}
-
-			if (!cs_active) {
-				ramips_spi_set_cs(rs, 1);
-				cs_active = 1;
-			}
-
-			if (t->len)
-				m->actual_length +=
-					ramips_spi_write_read(spi, t);
-
-			if (t->delay_usecs)
-				udelay(t->delay_usecs);
-
-			if (t->cs_change) {
-				ramips_spi_set_cs(rs, 0);
-				cs_active = 0;
-			}
-		}
-
-msg_done:
-		if (cs_active)
-			ramips_spi_set_cs(rs, 0);
-
-		m->status = status;
-		m->complete(m->context);
-
-		spin_lock_irq(&rs->lock);
-	}
-
-	spin_unlock_irq(&rs->lock);
-}
-
-static int ramips_spi_setup(struct spi_device *spi)
-{
-	struct ramips_spi *rs = ramips_spidev_to_rs(spi);
-
-	if ((spi->max_speed_hz == 0) ||
-	    (spi->max_speed_hz > (rs->sys_freq / 2)))
-		spi->max_speed_hz = (rs->sys_freq / 2);
-
-	if (spi->max_speed_hz < (rs->sys_freq/128)) {
-		dev_err(&spi->dev, "setup: requested speed too low %d Hz\n",
-			spi->max_speed_hz);
-		return -EINVAL;
-	}
-
-	if (spi->bits_per_word != 0 && spi->bits_per_word != 8) {
-		dev_err(&spi->dev,
-			"setup: requested bits per words - os wrong %d bpw\n",
-			spi->bits_per_word);
-		return -EINVAL;
-	}
-
-	if (spi->bits_per_word == 0)
-		spi->bits_per_word = 8;
-
-	/*
-	 * baudrate & width will be set ramips_spi_setup_transfer
-	 */
-	return 0;
-}
-
-static int ramips_spi_transfer(struct spi_device *spi, struct spi_message *m)
-{
-	struct ramips_spi *rs;
-	struct spi_transfer *t = NULL;
-	unsigned long flags;
-
-	m->actual_length = 0;
-	m->status = 0;
-
-	/* reject invalid messages and transfers */
-	if (list_empty(&m->transfers) || !m->complete)
-		return -EINVAL;
-
-	rs = ramips_spidev_to_rs(spi);
-
-	list_for_each_entry(t, &m->transfers, transfer_list) {
-		unsigned int bits_per_word = spi->bits_per_word;
-
-		if (t->tx_buf == NULL && t->rx_buf == NULL && t->len) {
-			dev_err(&spi->dev,
-				"message rejected : "
-				"invalid transfer data buffers\n");
-			goto msg_rejected;
-		}
-
-		if (t->bits_per_word)
-			bits_per_word = t->bits_per_word;
-
-		if (bits_per_word != 8) {
-			dev_err(&spi->dev,
-				"message rejected : "
-				"invalid transfer bits_per_word (%d bits)\n",
-				bits_per_word);
-			goto msg_rejected;
-		}
-
-		if (t->speed_hz && t->speed_hz < (rs->sys_freq/128)) {
-			dev_err(&spi->dev,
-				"message rejected : "
-				"device min speed (%d Hz) exceeds "
-				"required transfer speed (%d Hz)\n",
-				(rs->sys_freq/128), t->speed_hz);
-			goto msg_rejected;
-		}
-	}
-
-
-	spin_lock_irqsave(&rs->lock, flags);
-	list_add_tail(&m->queue, &rs->msg_queue);
-	queue_work(ramips_spi_wq, &rs->work);
-	spin_unlock_irqrestore(&rs->lock, flags);
-
-	return 0;
-msg_rejected:
-	/* Message rejected and not queued */
-	m->status = -EINVAL;
-	if (m->complete)
-		m->complete(m->context);
-	return -EINVAL;
-}
-
-static void __init ramips_spi_reset(struct ramips_spi *rs)
-{
-	ramips_spi_write(rs, RAMIPS_SPI_CFG,
-			 SPICFG_MSBFIRST | SPICFG_TXCLKEDGE_FALLING |
-			 SPICFG_SPICLK_DIV16 | SPICFG_SPICLKPOL);
-	ramips_spi_write(rs, RAMIPS_SPI_CTL, SPICTL_HIZSDO | SPICTL_SPIENA);
-}
-
-static int __init ramips_spi_probe(struct platform_device *pdev)
-{
-	struct spi_master *master;
-	struct ramips_spi *rs;
-	struct resource *r;
-	int status = 0;
-
-	master = spi_alloc_master(&pdev->dev, sizeof(*rs));
-	if (master == NULL) {
-		dev_dbg(&pdev->dev, "master allocation failed\n");
-		return -ENOMEM;
-	}
-
-	if (pdev->id != -1)
-		master->bus_num = pdev->id;
-
-	/* we support only mode 0, and no options */
-	master->mode_bits = 0;
-
-	master->setup = ramips_spi_setup;
-	master->transfer = ramips_spi_transfer;
-	master->num_chipselect = RALINK_NUM_CHIPSELECTS;
-
-	dev_set_drvdata(&pdev->dev, master);
-
-	rs = spi_master_get_devdata(master);
-	rs->master = master;
-
-	rs->clk = clk_get(NULL, "sys");
-	if (IS_ERR(rs->clk)) {
-		status = PTR_ERR(rs->clk);
-		dev_err(&pdev->dev, "unable to get SYS clock, err=%d\n",
-			status);
-		goto out_put_master;
-	}
-
-	status = clk_enable(rs->clk);
-	if (status)
-		goto out_put_clk;
-
-	rs->sys_freq = clk_get_rate(rs->clk);
-	spi_debug("%s: sys_freq: %ld\n", __func__, rs->sys_freq);
-
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (r == NULL) {
-		status = -ENODEV;
-		goto out_disable_clk;
-	}
-
-	if (!request_mem_region(r->start, (r->end - r->start) + 1,
-				dev_name(&pdev->dev))) {
-		status = -EBUSY;
-		goto out_disable_clk;
-	}
-
-	rs->base = ioremap(r->start, resource_size(r));
-	if (rs->base == NULL) {
-		dev_err(&pdev->dev, "ioremap failed\n");
-		status = -ENOMEM;
-		goto out_rel_mem;
-	}
-
-	INIT_WORK(&rs->work, ramips_spi_work);
-
-	spin_lock_init(&rs->lock);
-	INIT_LIST_HEAD(&rs->msg_queue);
-
-	ramips_spi_reset(rs);
-
-	status = spi_register_master(master);
-	if (status)
-		goto out_unmap_base;
-
-	return 0;
-
-out_unmap_base:
-	iounmap(rs->base);
-out_rel_mem:
-	release_mem_region(r->start, (r->end - r->start) + 1);
-out_disable_clk:
-	clk_disable(rs->clk);
-out_put_clk:
-	clk_put(rs->clk);
-out_put_master:
-	spi_master_put(master);
-	return status;
-}
-
-static int ramips_spi_remove(struct platform_device *pdev)
-{
-	struct spi_master *master;
-	struct ramips_spi *rs;
-	struct resource *r;
-
-	master = dev_get_drvdata(&pdev->dev);
-	rs = spi_master_get_devdata(master);
-
-	cancel_work_sync(&rs->work);
-
-	iounmap(rs->base);
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	release_mem_region(r->start, (r->end - r->start) + 1);
-
-	clk_disable(rs->clk);
-	clk_put(rs->clk);
-	spi_unregister_master(master);
-
-	return 0;
-}
-
-MODULE_ALIAS("platform:" DRIVER_NAME);
-
-static struct platform_driver ramips_spi_driver = {
-	.driver = {
-		.name	= DRIVER_NAME,
-		.owner	= THIS_MODULE,
-	},
-	.remove		= ramips_spi_remove,
-};
-
-static int __init ramips_spi_init(void)
-{
-	ramips_spi_wq = create_singlethread_workqueue(
-				ramips_spi_driver.driver.name);
-	if (ramips_spi_wq == NULL)
-		return -ENOMEM;
-
-	return platform_driver_probe(&ramips_spi_driver, ramips_spi_probe);
-}
-module_init(ramips_spi_init);
-
-static void __exit ramips_spi_exit(void)
-{
-	flush_workqueue(ramips_spi_wq);
-	platform_driver_unregister(&ramips_spi_driver);
-
-	destroy_workqueue(ramips_spi_wq);
-}
-module_exit(ramips_spi_exit);
-
-MODULE_DESCRIPTION("Ralink SPI driver");
-MODULE_AUTHOR("Sergiy <piratfm@gmail.com>");
-MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
-MODULE_LICENSE("GPL");