bcm63xx: add support for linux 3.7

Based on 3.7.6.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35481 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 481 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/patches-3.7/426-SPI-MIPS-BCM63XX-Add-HS-SPI-driver.patch b/target/linux/brcm63xx/patches-3.7/426-SPI-MIPS-BCM63XX-Add-HS-SPI-driver.patch
new file mode 100644
index 0000000000..2b213968a1
--- /dev/null
+++ b/target/linux/brcm63xx/patches-3.7/426-SPI-MIPS-BCM63XX-Add-HS-SPI-driver.patch
@@ -0,0 +1,481 @@
+From 4b27423676485d05bcd6fc6f3809164fb8f9d22d Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jonas.gorski@gmail.com>
+Date: Sat, 12 Nov 2011 12:19:55 +0100
+Subject: [PATCH 30/60] SPI: MIPS: BCM63XX: Add HSSPI driver
+
+Add a driver for the High Speed SPI controller found on newer BCM63XX SoCs.
+
+Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+---
+ .../include/asm/mach-bcm63xx/bcm63xx_dev_hsspi.h   |    2 +
+ drivers/spi/Kconfig                                |    7 +
+ drivers/spi/Makefile                               |    1 +
+ drivers/spi/spi-bcm63xx-hsspi.c                    |  427 ++++++++++++++++++++
+ 4 files changed, 437 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/spi/spi-bcm63xx-hsspi.c
+
+--- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_hsspi.h
++++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_hsspi.h
+@@ -17,4 +17,6 @@ struct bcm63xx_hsspi_pdata {
+ 
+ #define HSSPI_PLL_HZ_6328	133333333
+ 
++#define HSSPI_BUFFER_LEN   	512
++
+ #endif /* BCM63XX_DEV_HSSPI_H */
+--- a/drivers/spi/Kconfig
++++ b/drivers/spi/Kconfig
+@@ -100,6 +100,13 @@ config SPI_BCM63XX
+ 	help
+           Enable support for the SPI controller on the Broadcom BCM63xx SoCs.
+ 
++config SPI_BCM63XX_HSSPI
++	tristate "Broadcom BCM63XX HS SPI controller driver"
++	depends on BCM63XX
++	help
++	  This enables support for the High Speed SPI controller present on
++	  newer Broadcom BCM63XX SoCs.
++
+ config SPI_BITBANG
+ 	tristate "Utilities for Bitbanging SPI masters"
+ 	help
+--- a/drivers/spi/Makefile
++++ b/drivers/spi/Makefile
+@@ -15,6 +15,7 @@ obj-$(CONFIG_SPI_ATMEL)			+= spi-atmel.o
+ obj-$(CONFIG_SPI_ATH79)			+= spi-ath79.o
+ obj-$(CONFIG_SPI_AU1550)		+= spi-au1550.o
+ obj-$(CONFIG_SPI_BCM63XX)		+= spi-bcm63xx.o
++obj-$(CONFIG_SPI_BCM63XX_HSSPI)		+= spi-bcm63xx-hsspi.o
+ obj-$(CONFIG_SPI_BFIN5XX)		+= spi-bfin5xx.o
+ obj-$(CONFIG_SPI_BFIN_SPORT)		+= spi-bfin-sport.o
+ obj-$(CONFIG_SPI_BITBANG)		+= spi-bitbang.o
+--- /dev/null
++++ b/drivers/spi/spi-bcm63xx-hsspi.c
+@@ -0,0 +1,427 @@
++/*
++ * Broadcom BCM63XX High Speed SPI Controller driver
++ *
++ * Copyright 2000-2010 Broadcom Corporation
++ * Copyright 2012 Jonas Gorski <jonas.gorski@gmail.com>
++ *
++ * Licensed under the GNU/GPL. See COPYING for details.
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/io.h>
++#include <linux/clk.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/delay.h>
++#include <linux/dma-mapping.h>
++#include <linux/err.h>
++#include <linux/interrupt.h>
++#include <linux/spi/spi.h>
++#include <linux/workqueue.h>
++
++#include <bcm63xx_regs.h>
++#include <bcm63xx_dev_hsspi.h>
++
++#define HSSPI_OP_CODE_SHIFT	13
++#define HSSPI_OP_SLEEP		(0 << HSSPI_OP_CODE_SHIFT)
++#define HSSPI_OP_READ_WRITE	(1 << HSSPI_OP_CODE_SHIFT)
++#define HSSPI_OP_WRITE		(2 << HSSPI_OP_CODE_SHIFT)
++#define HSSPI_OP_READ		(3 << HSSPI_OP_CODE_SHIFT)
++
++#define HSSPI_MAX_PREPEND_LEN	15
++
++#define HSSPI_MAX_SYNC_CLOCK	30000000
++
++struct bcm63xx_hsspi {
++	struct completion	done;
++	struct spi_transfer	*curr_trans;
++
++	struct platform_device  *pdev;
++	struct clk		*clk;
++	void __iomem		*regs;
++	u8 __iomem		*fifo;
++
++	u32			speed_hz;
++	int			irq;
++};
++
++static void bcm63xx_hsspi_set_clk(struct bcm63xx_hsspi *bs, int hz,
++				  int profile)
++{
++	u32 reg;
++
++	reg = DIV_ROUND_UP(2048, DIV_ROUND_UP(bs->speed_hz, hz));
++	bcm_hsspi_writel(CLK_CTRL_ACCUM_RST_ON_LOOP | reg,
++			 HSSPI_PROFILE_CLK_CTRL_REG(profile));
++
++	reg = bcm_hsspi_readl(HSSPI_PROFILE_SIGNAL_CTRL_REG(profile));
++	if (hz > HSSPI_MAX_SYNC_CLOCK)
++		reg |= SIGNAL_CTRL_ASYNC_INPUT_PATH;
++	else
++		reg &= ~SIGNAL_CTRL_ASYNC_INPUT_PATH;
++	bcm_hsspi_writel(reg, HSSPI_PROFILE_SIGNAL_CTRL_REG(profile));
++}
++
++static int bcm63xx_hsspi_do_txrx(struct spi_device *spi,
++				 struct spi_transfer *t1,
++				 struct spi_transfer *t2)
++{
++	struct bcm63xx_hsspi *bs = spi_master_get_devdata(spi->master);
++	u8 chip_select = spi->chip_select;
++	u16 opcode = 0;
++	int len, prepend_size = 0;
++
++	init_completion(&bs->done);
++
++	bs->curr_trans = t2 ? t2 : t1;
++	bcm63xx_hsspi_set_clk(bs, bs->curr_trans->speed_hz, chip_select);
++
++	if (t2 && !t2->tx_buf)
++		prepend_size = t1->len;
++
++	bcm_hsspi_writel(prepend_size << MODE_CTRL_PREPENDBYTE_CNT_SHIFT |
++			 2 << MODE_CTRL_MULTIDATA_WR_STRT_SHIFT |
++			 2 << MODE_CTRL_MULTIDATA_RD_STRT_SHIFT | 0xff,
++			 HSSPI_PROFILE_MODE_CTRL_REG(chip_select));
++
++	if (t1->rx_buf && t1->tx_buf)
++		opcode = HSSPI_OP_READ_WRITE;
++	else if (t1->rx_buf || (t2 && t2->rx_buf))
++		opcode = HSSPI_OP_READ;
++	else if (t1->tx_buf)
++		opcode = HSSPI_OP_WRITE;
++
++	if (opcode == HSSPI_OP_READ && t2)
++		len = t2->len;
++	else
++		len = t1->len;
++
++	if (t1->tx_buf) {
++		memcpy_toio(bs->fifo + 2, t1->tx_buf, t1->len);
++		if (t2 && t2->tx_buf) {
++			memcpy_toio(bs->fifo + 2 + t1->len,
++				    t2->tx_buf, t2->len);
++			len += t2->len;
++		}
++	}
++
++	opcode |= len;
++	memcpy_toio(bs->fifo, &opcode, sizeof(opcode));
++
++	/* enable interrupt */
++	bcm_hsspi_writel(HSSPI_PING0_CMD_DONE, HSSPI_INT_MASK_REG);
++
++	/* start the transfer */
++	bcm_hsspi_writel(chip_select << PINGPONG_CMD_SS_SHIFT |
++			 chip_select << PINGPONG_CMD_PROFILE_SHIFT |
++			 PINGPONG_COMMAND_START_NOW,
++			 HSSPI_PINGPONG_COMMAND_REG(0));
++
++	if (wait_for_completion_timeout(&bs->done, HZ) == 0) {
++		dev_err(&bs->pdev->dev, "transfer timed out!\n");
++		return -ETIMEDOUT;
++	}
++
++	return t1->len + (t2 ? t2->len : 0);
++}
++
++static int bcm63xx_hsspi_setup(struct spi_device *spi)
++{
++	u32 reg;
++
++	if (spi->bits_per_word != 8)
++		return -EINVAL;
++
++	if (spi->max_speed_hz == 0)
++		return -EINVAL;
++
++	reg = bcm_hsspi_readl(HSSPI_PROFILE_SIGNAL_CTRL_REG(spi->chip_select));
++	reg &= ~(SIGNAL_CTRL_LAUNCH_RISING | SIGNAL_CTRL_LATCH_RISING);
++	if (spi->mode & SPI_CPHA)
++		reg |= SIGNAL_CTRL_LAUNCH_RISING;
++	else
++		reg |= SIGNAL_CTRL_LATCH_RISING;
++	bcm_hsspi_writel(reg, HSSPI_PROFILE_SIGNAL_CTRL_REG(spi->chip_select));
++
++	return 0;
++}
++
++static int bcm63xx_hsspi_transfer_one(struct spi_master *master,
++				      struct spi_message *msg)
++{
++	struct spi_transfer *t, *prev = NULL;
++	struct spi_device *spi = msg->spi;
++	u32 reg;
++	int ret = -EINVAL;
++	int len = 0;
++
++	/* check if we are able to make these transfers */
++	list_for_each_entry(t, &msg->transfers, transfer_list) {
++		if (!t->tx_buf && !t->rx_buf)
++			goto out;
++
++		if (t->speed_hz == 0)
++			t->speed_hz = spi->max_speed_hz;
++
++		if (t->speed_hz > spi->max_speed_hz)
++			goto out;
++
++		if (t->len > HSSPI_BUFFER_LEN)
++			goto out;
++
++		/*
++		 * This controller does not support keeping the chip select
++		 * active between transfers.
++		 * This logic currently supports combining:
++		 *  write then read with no cs_change (e.g. m25p80 RDSR)
++		 *  write then write with no cs_change (e.g. m25p80 PP)
++		 */
++		if (prev && prev->tx_buf && !prev->cs_change && !t->cs_change) {
++			/*
++			 * reject if we have to combine two tx transfers and
++			 * their combined length is bigger than the buffer
++			 */
++			if (prev->tx_buf && t->tx_buf &&
++			    (prev->len + t->len) > HSSPI_BUFFER_LEN)
++				goto out;
++			/*
++			 * reject if we need write more than 15 bytes in read
++			 * then write.
++			 */
++			if (prev->tx_buf && t->rx_buf &&
++			    prev->len > HSSPI_MAX_PREPEND_LEN)
++				goto out;
++		}
++
++	}
++
++	/* setup clock polarity */
++	reg = bcm_hsspi_readl(HSSPI_GLOBAL_CTRL_REG);
++	reg &= ~GLOBAL_CTRL_CLK_POLARITY;
++	if (spi->mode & SPI_CPOL)
++		reg |= GLOBAL_CTRL_CLK_POLARITY;
++	bcm_hsspi_writel(reg, HSSPI_GLOBAL_CTRL_REG);
++
++	list_for_each_entry(t, &msg->transfers, transfer_list) {
++		if (prev && prev->tx_buf && !prev->cs_change && !t->cs_change) {
++			/* combine write with following transfer */
++			ret = bcm63xx_hsspi_do_txrx(msg->spi, prev, t);
++			if (ret < 0)
++				goto out;
++
++			len += ret;
++			prev = NULL;
++			continue;
++		}
++
++		/* write the previous pending transfer */
++		if (prev != NULL) {
++			ret = bcm63xx_hsspi_do_txrx(msg->spi, prev, NULL);
++			if (ret < 0)
++				goto out;
++
++			len += ret;
++		}
++
++		prev = t;
++	}
++
++	/* do last pending transfer */
++	if (prev != NULL) {
++		ret = bcm63xx_hsspi_do_txrx(msg->spi, prev, NULL);
++		if (ret < 0)
++			goto out;
++		len += ret;
++	}
++
++	msg->actual_length = len;
++	ret = 0;
++out:
++	msg->status = ret;
++	spi_finalize_current_message(master);
++	return 0;
++}
++
++static irqreturn_t bcm63xx_hsspi_interrupt(int irq, void *dev_id)
++{
++	struct spi_master *master = (struct spi_master *)dev_id;
++	struct bcm63xx_hsspi *bs = spi_master_get_devdata(master);
++
++	if (bcm_hsspi_readl(HSSPI_INT_STATUS_MASKED_REG) == 0)
++		return IRQ_NONE;
++
++	bcm_hsspi_writel(HSSPI_INT_CLEAR_ALL, HSSPI_INT_STATUS_REG);
++	bcm_hsspi_writel(0, HSSPI_INT_MASK_REG);
++
++	if (bs->curr_trans && bs->curr_trans->rx_buf)
++		memcpy_fromio(bs->curr_trans->rx_buf,  bs->fifo,
++			      bs->curr_trans->len);
++	complete(&bs->done);
++
++	return IRQ_HANDLED;
++}
++
++static int __devinit bcm63xx_hsspi_probe(struct platform_device *pdev)
++{
++
++	struct spi_master *master;
++	struct bcm63xx_hsspi *bs;
++	struct resource *res_mem;
++	void __iomem *regs;
++	struct device *dev = &pdev->dev;
++	struct bcm63xx_hsspi_pdata *pdata = pdev->dev.platform_data;
++	struct clk *clk;
++	int irq;
++	int ret;
++
++	irq = platform_get_irq(pdev, 0);
++	if (irq < 0) {
++		dev_err(dev, "no irq\n");
++		return -ENXIO;
++	}
++
++	res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	regs = devm_request_and_ioremap(dev, res_mem);
++	if (!regs) {
++		dev_err(dev, "unable to ioremap regs\n");
++		return -ENXIO;
++	}
++
++	clk = clk_get(dev, "hsspi");
++
++	if (IS_ERR(clk)) {
++		ret = PTR_ERR(clk);
++		goto out_release;
++	}
++
++	clk_prepare_enable(clk);
++
++	master = spi_alloc_master(&pdev->dev, sizeof(*bs));
++	if (!master) {
++		ret = -ENOMEM;
++		goto out_disable_clk;
++	}
++
++	bs = spi_master_get_devdata(master);
++	bs->pdev = pdev;
++	bs->clk = clk;
++	bs->regs = regs;
++
++	master->bus_num = pdata->bus_num;
++	master->num_chipselect = 8;
++	master->setup = bcm63xx_hsspi_setup;
++	master->transfer_one_message = bcm63xx_hsspi_transfer_one;
++	master->mode_bits = SPI_CPOL | SPI_CPHA;
++
++	bs->speed_hz = pdata->speed_hz;
++	bs->fifo = (u8 __iomem *)(bs->regs + HSSPI_FIFO_REG(0));
++
++	platform_set_drvdata(pdev, master);
++
++	bs->curr_trans = NULL;
++
++	/* Initialize the hardware */
++	bcm_hsspi_writel(0, HSSPI_INT_MASK_REG);
++
++	/* clean up any pending interrupts */
++	bcm_hsspi_writel(HSSPI_INT_CLEAR_ALL, HSSPI_INT_STATUS_REG);
++
++	bcm_hsspi_writel(bcm_hsspi_readl(HSSPI_GLOBAL_CTRL_REG) |
++			 GLOBAL_CTRL_CLK_GATE_SSOFF,
++			 HSSPI_GLOBAL_CTRL_REG);
++
++	ret = devm_request_irq(dev, irq, bcm63xx_hsspi_interrupt, IRQF_SHARED,
++			       pdev->name, master);
++
++	if (ret)
++		goto out_put_master;
++
++	/* register and we are done */
++	ret = spi_register_master(master);
++	if (ret)
++		goto out_free_irq;
++
++	return 0;
++
++out_free_irq:
++	devm_free_irq(dev, bs->irq, master);
++out_put_master:
++	spi_master_put(master);
++out_disable_clk:
++	clk_disable_unprepare(clk);
++	clk_put(clk);
++out_release:
++	devm_ioremap_release(dev, regs);
++
++	return ret;
++}
++
++
++static int __exit bcm63xx_hsspi_remove(struct platform_device *pdev)
++{
++	struct spi_master *master = platform_get_drvdata(pdev);
++	struct bcm63xx_hsspi *bs = spi_master_get_devdata(master);
++
++	spi_unregister_master(master);
++
++	/* reset the hardware and block queue progress */
++	bcm_hsspi_writel(0, HSSPI_INT_MASK_REG);
++	clk_disable_unprepare(bs->clk);
++	clk_put(bs->clk);
++
++	return 0;
++}
++
++#ifdef CONFIG_PM
++static int bcm63xx_hsspi_suspend(struct platform_device *pdev,
++				 pm_message_t mesg)
++{
++	struct spi_master *master = platform_get_drvdata(pdev);
++	struct bcm63xx_hsspi *bs = spi_master_get_devdata(master);
++
++	spi_master_suspend(master);
++	clk_disable(bs->clk);
++
++	return 0;
++}
++
++static int bcm63xx_hsspi_resume(struct platform_device *pdev)
++{
++	struct spi_master *master = platform_get_drvdata(pdev);
++	struct bcm63xx_hsspi *bs = spi_master_get_devdata(master);
++
++	clk_enable(bs->clk);
++	spi_master_resume(master);
++
++	return 0;
++}
++
++static const struct dev_pm_ops bcm63xx_hsspi_pm_ops = {
++	.suspend	= bcm63xx_hsspi_suspend,
++	.resume		= bcm63xx_hsspi_resume,
++};
++
++#define BCM63XX_HSSPI_PM_OPS	(&bcm63xx_hsspi_pm_ops)
++#else
++#define BCM63XX_HSSPI_PM_OPS	NULL
++#endif
++
++
++
++static struct platform_driver bcm63xx_hsspi_driver = {
++	.driver = {
++		.name	= "bcm63xx-hsspi",
++		.owner	= THIS_MODULE,
++		.pm	= BCM63XX_HSSPI_PM_OPS,
++	},
++	.probe		= bcm63xx_hsspi_probe,
++	.remove		= __exit_p(bcm63xx_hsspi_remove),
++};
++
++module_platform_driver(bcm63xx_hsspi_driver);
++
++MODULE_ALIAS("platform:bcm63xx_hsspi");
++MODULE_DESCRIPTION("Broadcom BCM63xx HS SPI Controller driver");
++MODULE_AUTHOR("Jonas Gorski <jonas.gorski@gmail.com>");
++MODULE_LICENSE("GPL");