ramips: sync kernel patches with the mips-next tree

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 36431

1 files changed, 0 insertions, 515 deletions

diff --git a/target/linux/ramips/patches-3.8/0115-SPI-ralink-add-Ralink-SoC-spi-driver.patch b/target/linux/ramips/patches-3.8/0115-SPI-ralink-add-Ralink-SoC-spi-driver.patch
deleted file mode 100644
index b2717d139f..0000000000
--- a/target/linux/ramips/patches-3.8/0115-SPI-ralink-add-Ralink-SoC-spi-driver.patch
+++ /dev/null
@@ -1,515 +0,0 @@
-e8c5ebbd743dac63178807c0f68fe1b75680474a3 Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Wed, 30 Jan 2013 17:58:15 +0100
-Subject: [PATCH 115/121] SPI: ralink: add Ralink SoC spi driver
-
-Add the driver needed to make SPI work on Ralink SoC.
-
-Signed-off-by: John Crispin <blogic@openwrt.org>
----
- drivers/spi/Kconfig      |    6 +
- drivers/spi/Makefile     |    1 +
- drivers/spi/spi-ralink.c |  472 ++++++++++++++++++++++++++++++++++++++++++++++
- 3 files changed, 479 insertions(+)
- create mode 100644 drivers/spi/spi-ralink.c
-
---- a/drivers/spi/Kconfig
-+++ b/drivers/spi/Kconfig
-@@ -324,6 +324,12 @@ config SPI_RSPI
- 	help
- 	  SPI driver for Renesas RSPI blocks.
- 
-+config SPI_RALINK
-+	tristate "Ralink RT288x/RT305x/RT3662 SPI Controller"
-+	depends on (SOC_RT288X || SOC_RT305X || SOC_RT3883)
-+	help
-+	  This selects a driver for the Ralink RT288x/RT305x SPI Controller.
-+
- config SPI_S3C24XX
- 	tristate "Samsung S3C24XX series SPI"
- 	depends on ARCH_S3C24XX && EXPERIMENTAL
---- a/drivers/spi/Makefile
-+++ b/drivers/spi/Makefile
-@@ -51,6 +51,7 @@ obj-$(CONFIG_SPI_PPC4xx)		+= spi-ppc4xx.
- obj-$(CONFIG_SPI_PXA2XX)		+= spi-pxa2xx.o
- obj-$(CONFIG_SPI_PXA2XX_PCI)		+= spi-pxa2xx-pci.o
- obj-$(CONFIG_SPI_RSPI)			+= spi-rspi.o
-+obj-$(CONFIG_SPI_RALINK)		+= spi-ralink.o
- obj-$(CONFIG_SPI_S3C24XX)		+= spi-s3c24xx-hw.o
- spi-s3c24xx-hw-y			:= spi-s3c24xx.o
- spi-s3c24xx-hw-$(CONFIG_SPI_S3C24XX_FIQ) += spi-s3c24xx-fiq.o
---- /dev/null
-+++ b/drivers/spi/spi-ralink.c
-@@ -0,0 +1,472 @@
-+/*
-+ * spi-ralink.c -- Ralink RT288x/RT305x SPI controller driver
-+ *
-+ * Copyright (C) 2011 Sergiy <piratfm@gmail.com>
-+ * Copyright (C) 2011-2013 Gabor Juhos <juhosg@openwrt.org>
-+ *
-+ * Some parts are based on spi-orion.c:
-+ *   Author: Shadi Ammouri <shadi@marvell.com>
-+ *   Copyright (C) 2007-2008 Marvell Ltd.
-+ *
-+ * 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			"spi-ralink"
-+#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 ralink_spi {
-+	struct spi_master	*master;
-+	void __iomem		*base;
-+	unsigned int		sys_freq;
-+	unsigned int		speed;
-+	struct clk		*clk;
-+};
-+
-+static inline struct ralink_spi *spidev_to_ralink_spi(struct spi_device *spi)
-+{
-+	return spi_master_get_devdata(spi->master);
-+}
-+
-+static inline u32 ralink_spi_read(struct ralink_spi *rs, u32 reg)
-+{
-+	return ioread32(rs->base + reg);
-+}
-+
-+static inline void ralink_spi_write(struct ralink_spi *rs, u32 reg, u32 val)
-+{
-+	iowrite32(val, rs->base + reg);
-+}
-+
-+static inline void ralink_spi_setbits(struct ralink_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 ralink_spi_clrbits(struct ralink_spi *rs, u32 reg, u32 mask)
-+{
-+	void __iomem *addr = rs->base + reg;
-+	u32 val;
-+
-+	val = ioread32(addr);
-+	val &= ~mask;
-+	iowrite32(val, addr);
-+}
-+
-+static int ralink_spi_baudrate_set(struct spi_device *spi, unsigned int speed)
-+{
-+	struct ralink_spi *rs = spidev_to_ralink_spi(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 = ralink_spi_read(rs, RAMIPS_SPI_CFG);
-+	reg = ((reg & ~SPICFG_SPICLK_PRESCALE_MASK) | prescale);
-+	ralink_spi_write(rs, RAMIPS_SPI_CFG, reg);
-+	rs->speed = speed;
-+	return 0;
-+}
-+
-+/*
-+ * called only when no transfer is active on the bus
-+ */
-+static int
-+ralink_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
-+{
-+	struct ralink_spi *rs = spidev_to_ralink_spi(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 = ralink_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 ralink_spi_set_cs(struct ralink_spi *rs, int enable)
-+{
-+	if (enable)
-+		ralink_spi_clrbits(rs, RAMIPS_SPI_CTL, SPICTL_SPIENA);
-+	else
-+		ralink_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_SPIENA);
-+}
-+
-+static inline int ralink_spi_wait_till_ready(struct ralink_spi *rs)
-+{
-+	int i;
-+
-+	for (i = 0; i < RALINK_SPI_WAIT_RDY_MAX_LOOP; i++) {
-+		u32 status;
-+
-+		status = ralink_spi_read(rs, RAMIPS_SPI_STAT);
-+		if ((status & SPISTAT_BUSY) == 0)
-+			return 0;
-+
-+		udelay(1);
-+	}
-+
-+	return -ETIMEDOUT;
-+}
-+
-+static unsigned int
-+ralink_spi_write_read(struct spi_device *spi, struct spi_transfer *xfer)
-+{
-+	struct ralink_spi *rs = spidev_to_ralink_spi(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++) {
-+			ralink_spi_write(rs, RAMIPS_SPI_DATA, tx[count]);
-+			ralink_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_STARTWR);
-+			err = ralink_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++) {
-+			ralink_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_STARTRD);
-+			err = ralink_spi_wait_till_ready(rs);
-+			if (err) {
-+				dev_err(&spi->dev, "RX failed, err=%d\n", err);
-+				goto out;
-+			}
-+			rx[count] = (u8) ralink_spi_read(rs, RAMIPS_SPI_DATA);
-+		}
-+	}
-+
-+out:
-+	return count;
-+}
-+
-+static int ralink_spi_transfer_one_message(struct spi_master *master,
-+					   struct spi_message *m)
-+{
-+	struct ralink_spi *rs = spi_master_get_devdata(master);
-+	struct spi_device *spi = m->spi;
-+	struct spi_transfer *t = NULL;
-+	int par_override = 0;
-+	int status = 0;
-+	int cs_active = 0;
-+
-+	/* Load defaults */
-+	status = ralink_spi_setup_transfer(spi, NULL);
-+	if (status < 0)
-+		goto msg_done;
-+
-+	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");
-+			status = -EIO;
-+			goto msg_done;
-+		}
-+
-+		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);
-+			status = -EIO;
-+			goto msg_done;
-+		}
-+
-+		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);
-+			status = -EIO;
-+			goto msg_done;
-+		}
-+
-+		if (par_override || t->speed_hz || t->bits_per_word) {
-+			par_override = 1;
-+			status = ralink_spi_setup_transfer(spi, t);
-+			if (status < 0)
-+				goto msg_done;
-+			if (!t->speed_hz && !t->bits_per_word)
-+				par_override = 0;
-+		}
-+
-+		if (!cs_active) {
-+			ralink_spi_set_cs(rs, 1);
-+			cs_active = 1;
-+		}
-+
-+		if (t->len)
-+			m->actual_length += ralink_spi_write_read(spi, t);
-+
-+		if (t->delay_usecs)
-+			udelay(t->delay_usecs);
-+
-+		if (t->cs_change) {
-+			ralink_spi_set_cs(rs, 0);
-+			cs_active = 0;
-+		}
-+	}
-+
-+msg_done:
-+	if (cs_active)
-+		ralink_spi_set_cs(rs, 0);
-+
-+	m->status = status;
-+	spi_finalize_current_message(master);
-+
-+	return 0;
-+}
-+
-+static int ralink_spi_setup(struct spi_device *spi)
-+{
-+	struct ralink_spi *rs = spidev_to_ralink_spi(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 is 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 ralink_spi_setup_transfer
-+	 */
-+	return 0;
-+}
-+
-+static void ralink_spi_reset(struct ralink_spi *rs)
-+{
-+	ralink_spi_write(rs, RAMIPS_SPI_CFG,
-+			 SPICFG_MSBFIRST | SPICFG_TXCLKEDGE_FALLING |
-+			 SPICFG_SPICLK_DIV16 | SPICFG_SPICLKPOL);
-+	ralink_spi_write(rs, RAMIPS_SPI_CTL, SPICTL_HIZSDO | SPICTL_SPIENA);
-+}
-+
-+static int ralink_spi_probe(struct platform_device *pdev)
-+{
-+	struct spi_master *master;
-+	struct ralink_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 = 0;
-+
-+	/* we support only mode 0, and no options */
-+	master->mode_bits = 0;
-+
-+	master->setup = ralink_spi_setup;
-+	master->transfer_one_message = ralink_spi_transfer_one_message;
-+	master->num_chipselect = RALINK_NUM_CHIPSELECTS;
-+	master->dev.of_node = pdev->dev.of_node;
-+
-+	dev_set_drvdata(&pdev->dev, master);
-+
-+	rs = spi_master_get_devdata(master);
-+	rs->master = master;
-+
-+	rs->clk = clk_get(&pdev->dev, NULL);
-+	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: %u\n", __func__, rs->sys_freq);
-+
-+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+	if (r == NULL) {
-+		status = -ENODEV;
-+		goto out_disable_clk;
-+	}
-+
-+	rs->base = devm_request_and_ioremap(&pdev->dev, r);
-+	if (!rs->base) {
-+		status = -EADDRNOTAVAIL;
-+		goto out_disable_clk;
-+	}
-+
-+	ralink_spi_reset(rs);
-+
-+	status = spi_register_master(master);
-+	if (status)
-+		goto out_disable_clk;
-+
-+	return 0;
-+
-+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 ralink_spi_remove(struct platform_device *pdev)
-+{
-+	struct spi_master *master;
-+	struct ralink_spi *rs;
-+
-+	master = dev_get_drvdata(&pdev->dev);
-+	rs = spi_master_get_devdata(master);
-+
-+	clk_disable(rs->clk);
-+	clk_put(rs->clk);
-+	spi_unregister_master(master);
-+
-+	return 0;
-+}
-+
-+MODULE_ALIAS("platform:" DRIVER_NAME);
-+
-+static const struct of_device_id ralink_spi_match[] = {
-+	{ .compatible = "ralink,rt2880-spi" },
-+	{},
-+};
-+MODULE_DEVICE_TABLE(of, ralink_spi_match);
-+
-+static struct platform_driver ralink_spi_driver = {
-+	.driver = {
-+		.name = DRIVER_NAME,
-+		.owner = THIS_MODULE,
-+		.of_match_table = ralink_spi_match,
-+	},
-+	.probe = ralink_spi_probe,
-+	.remove = ralink_spi_remove,
-+};
-+
-+module_platform_driver(ralink_spi_driver);
-+
-+MODULE_DESCRIPTION("Ralink SPI driver");
-+MODULE_AUTHOR("Sergiy <piratfm@gmail.com>");
-+MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
-+MODULE_LICENSE("GPL");