[xburst] Add 2.6.35 patches

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22463 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 1102 insertions, 0 deletions

diff --git a/target/linux/xburst/patches-2.6.35/054-mmc.patch b/target/linux/xburst/patches-2.6.35/054-mmc.patch
new file mode 100644
index 000000000..842dcac4b
--- /dev/null
+++ b/target/linux/xburst/patches-2.6.35/054-mmc.patch
@@ -0,0 +1,1102 @@
+From 34e75141dfd8edae48030b61741c294fd0f952b1 Mon Sep 17 00:00:00 2001
+From: Lars-Peter Clausen <lars@metafoo.de>
+Date: Thu, 15 Jul 2010 20:06:04 +0000
+Subject: [PATCH] MMC: Add support for the controller on JZ4740 SoCs.
+
+Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
+Acked-by: Matt Fleming <matt@console-pimps.org>
+Cc: Andrew Morton <akpm@linux-foundation.org>
+Cc: Matt Fleming <matt@console-pimps.org>
+Cc: linux-mmc@vger.kernel.org
+Cc: linux-mips@linux-mips.org
+Cc: linux-kernel@vger.kernel.org
+Patchwork: https://patchwork.linux-mips.org/patch/1463/
+Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
+---
+ arch/mips/include/asm/mach-jz4740/jz4740_mmc.h |   15 +
+ drivers/mmc/host/Kconfig                       |    9 +
+ drivers/mmc/host/Makefile                      |    1 +
+ drivers/mmc/host/jz4740_mmc.c                  | 1033 ++++++++++++++++++++++++
+ 4 files changed, 1058 insertions(+), 0 deletions(-)
+ create mode 100644 arch/mips/include/asm/mach-jz4740/jz4740_mmc.h
+ create mode 100644 drivers/mmc/host/jz4740_mmc.c
+
+--- /dev/null
++++ b/arch/mips/include/asm/mach-jz4740/jz4740_mmc.h
+@@ -0,0 +1,15 @@
++#ifndef __LINUX_MMC_JZ4740_MMC
++#define __LINUX_MMC_JZ4740_MMC
++
++struct jz4740_mmc_platform_data {
++	int gpio_power;
++	int gpio_card_detect;
++	int gpio_read_only;
++	unsigned card_detect_active_low:1;
++	unsigned read_only_active_low:1;
++	unsigned power_active_low:1;
++
++	unsigned data_1bit:1;
++};
++
++#endif
+--- a/drivers/mmc/host/Kconfig
++++ b/drivers/mmc/host/Kconfig
+@@ -457,3 +457,12 @@ config MMC_SH_MMCIF
+ 	  This selects the MMC Host Interface controler (MMCIF).
+ 
+ 	  This driver supports MMCIF in sh7724/sh7757/sh7372.
++
++config MMC_JZ4740
++	tristate "JZ4740 SD/Multimedia Card Interface support"
++	depends on MACH_JZ4740
++	help
++	  This selects support for the SD/MMC controller on Ingenic JZ4740
++	  SoCs.
++	  If you have a board based on such a SoC and with a SD/MMC slot,
++	  say Y or M here.
+--- a/drivers/mmc/host/Makefile
++++ b/drivers/mmc/host/Makefile
+@@ -37,6 +37,7 @@ obj-$(CONFIG_MMC_VIA_SDMMC)	+= via-sdmmc
+ obj-$(CONFIG_GPIOMMC)		+= gpiommc.o
+ obj-$(CONFIG_SDH_BFIN)		+= bfin_sdh.o
+ obj-$(CONFIG_MMC_SH_MMCIF)	+= sh_mmcif.o
++obj-$(CONFIG_MMC_JZ4740)	+= jz4740_mmc.o
+ 
+ obj-$(CONFIG_MMC_SDHCI_OF)	+= sdhci-of.o
+ sdhci-of-y				:= sdhci-of-core.o
+--- /dev/null
++++ b/drivers/mmc/host/jz4740_mmc.c
+@@ -0,0 +1,1033 @@
++/*
++ *  Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
++ *  JZ4740 SD/MMC controller driver
++ *
++ *  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.
++ *
++ *  You should have received a copy of the  GNU General Public License along
++ *  with this program; if not, write  to the Free Software Foundation, Inc.,
++ *  675 Mass Ave, Cambridge, MA 02139, USA.
++ *
++ */
++
++#include <linux/mmc/host.h>
++#include <linux/io.h>
++#include <linux/irq.h>
++#include <linux/interrupt.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/delay.h>
++#include <linux/scatterlist.h>
++#include <linux/clk.h>
++
++#include <linux/bitops.h>
++#include <linux/gpio.h>
++#include <asm/mach-jz4740/gpio.h>
++#include <asm/cacheflush.h>
++#include <linux/dma-mapping.h>
++
++#include <asm/mach-jz4740/jz4740_mmc.h>
++
++#define JZ_REG_MMC_STRPCL	0x00
++#define JZ_REG_MMC_STATUS	0x04
++#define JZ_REG_MMC_CLKRT	0x08
++#define JZ_REG_MMC_CMDAT	0x0C
++#define JZ_REG_MMC_RESTO	0x10
++#define JZ_REG_MMC_RDTO		0x14
++#define JZ_REG_MMC_BLKLEN	0x18
++#define JZ_REG_MMC_NOB		0x1C
++#define JZ_REG_MMC_SNOB		0x20
++#define JZ_REG_MMC_IMASK	0x24
++#define JZ_REG_MMC_IREG		0x28
++#define JZ_REG_MMC_CMD		0x2C
++#define JZ_REG_MMC_ARG		0x30
++#define JZ_REG_MMC_RESP_FIFO	0x34
++#define JZ_REG_MMC_RXFIFO	0x38
++#define JZ_REG_MMC_TXFIFO	0x3C
++
++#define JZ_MMC_STRPCL_EXIT_MULTIPLE BIT(7)
++#define JZ_MMC_STRPCL_EXIT_TRANSFER BIT(6)
++#define JZ_MMC_STRPCL_START_READWAIT BIT(5)
++#define JZ_MMC_STRPCL_STOP_READWAIT BIT(4)
++#define JZ_MMC_STRPCL_RESET BIT(3)
++#define JZ_MMC_STRPCL_START_OP BIT(2)
++#define JZ_MMC_STRPCL_CLOCK_CONTROL (BIT(1) | BIT(0))
++#define JZ_MMC_STRPCL_CLOCK_STOP BIT(0)
++#define JZ_MMC_STRPCL_CLOCK_START BIT(1)
++
++
++#define JZ_MMC_STATUS_IS_RESETTING BIT(15)
++#define JZ_MMC_STATUS_SDIO_INT_ACTIVE BIT(14)
++#define JZ_MMC_STATUS_PRG_DONE BIT(13)
++#define JZ_MMC_STATUS_DATA_TRAN_DONE BIT(12)
++#define JZ_MMC_STATUS_END_CMD_RES BIT(11)
++#define JZ_MMC_STATUS_DATA_FIFO_AFULL BIT(10)
++#define JZ_MMC_STATUS_IS_READWAIT BIT(9)
++#define JZ_MMC_STATUS_CLK_EN BIT(8)
++#define JZ_MMC_STATUS_DATA_FIFO_FULL BIT(7)
++#define JZ_MMC_STATUS_DATA_FIFO_EMPTY BIT(6)
++#define JZ_MMC_STATUS_CRC_RES_ERR BIT(5)
++#define JZ_MMC_STATUS_CRC_READ_ERROR BIT(4)
++#define JZ_MMC_STATUS_TIMEOUT_WRITE BIT(3)
++#define JZ_MMC_STATUS_CRC_WRITE_ERROR BIT(2)
++#define JZ_MMC_STATUS_TIMEOUT_RES BIT(1)
++#define JZ_MMC_STATUS_TIMEOUT_READ BIT(0)
++
++#define JZ_MMC_STATUS_READ_ERROR_MASK (BIT(4) | BIT(0))
++#define JZ_MMC_STATUS_WRITE_ERROR_MASK (BIT(3) | BIT(2))
++
++
++#define JZ_MMC_CMDAT_IO_ABORT BIT(11)
++#define JZ_MMC_CMDAT_BUS_WIDTH_4BIT BIT(10)
++#define JZ_MMC_CMDAT_DMA_EN BIT(8)
++#define JZ_MMC_CMDAT_INIT BIT(7)
++#define JZ_MMC_CMDAT_BUSY BIT(6)
++#define JZ_MMC_CMDAT_STREAM BIT(5)
++#define JZ_MMC_CMDAT_WRITE BIT(4)
++#define JZ_MMC_CMDAT_DATA_EN BIT(3)
++#define JZ_MMC_CMDAT_RESPONSE_FORMAT (BIT(2) | BIT(1) | BIT(0))
++#define JZ_MMC_CMDAT_RSP_R1 1
++#define JZ_MMC_CMDAT_RSP_R2 2
++#define JZ_MMC_CMDAT_RSP_R3 3
++
++#define JZ_MMC_IRQ_SDIO BIT(7)
++#define JZ_MMC_IRQ_TXFIFO_WR_REQ BIT(6)
++#define JZ_MMC_IRQ_RXFIFO_RD_REQ BIT(5)
++#define JZ_MMC_IRQ_END_CMD_RES BIT(2)
++#define JZ_MMC_IRQ_PRG_DONE BIT(1)
++#define JZ_MMC_IRQ_DATA_TRAN_DONE BIT(0)
++
++
++#define JZ_MMC_CLK_RATE 24000000
++
++enum jz4740_mmc_state {
++	JZ4740_MMC_STATE_READ_RESPONSE,
++	JZ4740_MMC_STATE_TRANSFER_DATA,
++	JZ4740_MMC_STATE_SEND_STOP,
++	JZ4740_MMC_STATE_DONE,
++};
++
++struct jz4740_mmc_host {
++	struct mmc_host *mmc;
++	struct platform_device *pdev;
++	struct jz4740_mmc_platform_data *pdata;
++	struct clk *clk;
++
++	int irq;
++	int card_detect_irq;
++
++	struct resource *mem;
++	void __iomem *base;
++	struct mmc_request *req;
++	struct mmc_command *cmd;
++
++	unsigned long waiting;
++
++	uint32_t cmdat;
++
++	uint16_t irq_mask;
++
++	spinlock_t lock;
++
++	struct timer_list timeout_timer;
++	struct sg_mapping_iter miter;
++	enum jz4740_mmc_state state;
++};
++
++static void jz4740_mmc_set_irq_enabled(struct jz4740_mmc_host *host,
++	unsigned int irq, bool enabled)
++{
++	unsigned long flags;
++
++	spin_lock_irqsave(&host->lock, flags);
++	if (enabled)
++		host->irq_mask &= ~irq;
++	else
++		host->irq_mask |= irq;
++	spin_unlock_irqrestore(&host->lock, flags);
++
++	writew(host->irq_mask, host->base + JZ_REG_MMC_IMASK);
++}
++
++static void jz4740_mmc_clock_enable(struct jz4740_mmc_host *host,
++	bool start_transfer)
++{
++	uint16_t val = JZ_MMC_STRPCL_CLOCK_START;
++
++	if (start_transfer)
++		val |= JZ_MMC_STRPCL_START_OP;
++
++	writew(val, host->base + JZ_REG_MMC_STRPCL);
++}
++
++static void jz4740_mmc_clock_disable(struct jz4740_mmc_host *host)
++{
++	uint32_t status;
++	unsigned int timeout = 1000;
++
++	writew(JZ_MMC_STRPCL_CLOCK_STOP, host->base + JZ_REG_MMC_STRPCL);
++	do {
++		status = readl(host->base + JZ_REG_MMC_STATUS);
++	} while (status & JZ_MMC_STATUS_CLK_EN && --timeout);
++}
++
++static void jz4740_mmc_reset(struct jz4740_mmc_host *host)
++{
++	uint32_t status;
++	unsigned int timeout = 1000;
++
++	writew(JZ_MMC_STRPCL_RESET, host->base + JZ_REG_MMC_STRPCL);
++	udelay(10);
++	do {
++		status = readl(host->base + JZ_REG_MMC_STATUS);
++	} while (status & JZ_MMC_STATUS_IS_RESETTING && --timeout);
++}
++
++static void jz4740_mmc_request_done(struct jz4740_mmc_host *host)
++{
++	struct mmc_request *req;
++
++	req = host->req;
++	host->req = NULL;
++
++	mmc_request_done(host->mmc, req);
++}
++
++static unsigned int jz4740_mmc_poll_irq(struct jz4740_mmc_host *host,
++	unsigned int irq)
++{
++	unsigned int timeout = 0x800;
++	uint16_t status;
++
++	do {
++		status = readw(host->base + JZ_REG_MMC_IREG);
++	} while (!(status & irq) && --timeout);
++
++	if (timeout == 0) {
++		set_bit(0, &host->waiting);
++		mod_timer(&host->timeout_timer, jiffies + 5*HZ);
++		jz4740_mmc_set_irq_enabled(host, irq, true);
++		return true;
++	}
++
++	return false;
++}
++
++static void jz4740_mmc_transfer_check_state(struct jz4740_mmc_host *host,
++	struct mmc_data *data)
++{
++	int status;
++
++	status = readl(host->base + JZ_REG_MMC_STATUS);
++	if (status & JZ_MMC_STATUS_WRITE_ERROR_MASK) {
++		if (status & (JZ_MMC_STATUS_TIMEOUT_WRITE)) {
++			host->req->cmd->error = -ETIMEDOUT;
++			data->error = -ETIMEDOUT;
++		} else {
++			host->req->cmd->error = -EIO;
++			data->error = -EIO;
++		}
++	}
++}
++
++static bool jz4740_mmc_write_data(struct jz4740_mmc_host *host,
++	struct mmc_data *data)
++{
++	struct sg_mapping_iter *miter = &host->miter;
++	void __iomem *fifo_addr = host->base + JZ_REG_MMC_TXFIFO;
++	uint32_t *buf;
++	bool timeout;
++	size_t i, j;
++
++	while (sg_miter_next(miter)) {
++		buf = miter->addr;
++		i = miter->length / 4;
++		j = i / 8;
++		i = i & 0x7;
++		while (j) {
++			timeout = jz4740_mmc_poll_irq(host, JZ_MMC_IRQ_TXFIFO_WR_REQ);
++			if (unlikely(timeout))
++				goto poll_timeout;
++
++			writel(buf[0], fifo_addr);
++			writel(buf[1], fifo_addr);
++			writel(buf[2], fifo_addr);
++			writel(buf[3], fifo_addr);
++			writel(buf[4], fifo_addr);
++			writel(buf[5], fifo_addr);
++			writel(buf[6], fifo_addr);
++			writel(buf[7], fifo_addr);
++			buf += 8;
++			--j;
++		}
++		if (unlikely(i)) {
++			timeout = jz4740_mmc_poll_irq(host, JZ_MMC_IRQ_TXFIFO_WR_REQ);
++			if (unlikely(timeout))
++				goto poll_timeout;
++
++			while (i) {
++				writel(*buf, fifo_addr);
++				++buf;
++				--i;
++			}
++		}
++		data->bytes_xfered += miter->length;
++	}
++	sg_miter_stop(miter);
++
++	return false;
++
++poll_timeout:
++	miter->consumed = (void *)buf - miter->addr;
++	data->bytes_xfered += miter->consumed;
++	sg_miter_stop(miter);
++
++	return true;
++}
++
++static bool jz4740_mmc_read_data(struct jz4740_mmc_host *host,
++				struct mmc_data *data)
++{
++	struct sg_mapping_iter *miter = &host->miter;
++	void __iomem *fifo_addr = host->base + JZ_REG_MMC_RXFIFO;
++	uint32_t *buf;
++	uint32_t d;
++	uint16_t status;
++	size_t i, j;
++	unsigned int timeout;
++
++	while (sg_miter_next(miter)) {
++		buf = miter->addr;
++		i = miter->length;
++		j = i / 32;
++		i = i & 0x1f;
++		while (j) {
++			timeout = jz4740_mmc_poll_irq(host, JZ_MMC_IRQ_RXFIFO_RD_REQ);
++			if (unlikely(timeout))
++				goto poll_timeout;
++
++			buf[0] = readl(fifo_addr);
++			buf[1] = readl(fifo_addr);
++			buf[2] = readl(fifo_addr);
++			buf[3] = readl(fifo_addr);
++			buf[4] = readl(fifo_addr);
++			buf[5] = readl(fifo_addr);
++			buf[6] = readl(fifo_addr);
++			buf[7] = readl(fifo_addr);
++
++			buf += 8;
++			--j;
++		}
++
++		if (unlikely(i)) {
++			timeout = jz4740_mmc_poll_irq(host, JZ_MMC_IRQ_RXFIFO_RD_REQ);
++			if (unlikely(timeout))
++				goto poll_timeout;
++
++			while (i >= 4) {
++				*buf++ = readl(fifo_addr);
++				i -= 4;
++			}
++			if (unlikely(i > 0)) {
++				d = readl(fifo_addr);
++				memcpy(buf, &d, i);
++			}
++		}
++		data->bytes_xfered += miter->length;
++
++		/* This can go away once MIPS implements
++		 * flush_kernel_dcache_page */
++		flush_dcache_page(miter->page);
++	}
++	sg_miter_stop(miter);
++
++	/* For whatever reason there is sometime one word more in the fifo then
++	 * requested */
++	timeout = 1000;
++	status = readl(host->base + JZ_REG_MMC_STATUS);
++	while (!(status & JZ_MMC_STATUS_DATA_FIFO_EMPTY) && --timeout) {
++		d = readl(fifo_addr);
++		status = readl(host->base + JZ_REG_MMC_STATUS);
++	}
++
++	return false;
++
++poll_timeout:
++	miter->consumed = (void *)buf - miter->addr;
++	data->bytes_xfered += miter->consumed;
++	sg_miter_stop(miter);
++
++	return true;
++}
++
++static void jz4740_mmc_timeout(unsigned long data)
++{
++	struct jz4740_mmc_host *host = (struct jz4740_mmc_host *)data;
++
++	if (!test_and_clear_bit(0, &host->waiting))
++		return;
++
++	jz4740_mmc_set_irq_enabled(host, JZ_MMC_IRQ_END_CMD_RES, false);
++
++	host->req->cmd->error = -ETIMEDOUT;
++	jz4740_mmc_request_done(host);
++}
++
++static void jz4740_mmc_read_response(struct jz4740_mmc_host *host,
++	struct mmc_command *cmd)
++{
++	int i;
++	uint16_t tmp;
++	void __iomem *fifo_addr = host->base + JZ_REG_MMC_RESP_FIFO;
++
++	if (cmd->flags & MMC_RSP_136) {
++		tmp = readw(fifo_addr);
++		for (i = 0; i < 4; ++i) {
++			cmd->resp[i] = tmp << 24;
++			tmp = readw(fifo_addr);
++			cmd->resp[i] |= tmp << 8;
++			tmp = readw(fifo_addr);
++			cmd->resp[i] |= tmp >> 8;
++		}
++	} else {
++		cmd->resp[0] = readw(fifo_addr) << 24;
++		cmd->resp[0] |= readw(fifo_addr) << 8;
++		cmd->resp[0] |= readw(fifo_addr) & 0xff;
++	}
++}
++
++static void jz4740_mmc_send_command(struct jz4740_mmc_host *host,
++	struct mmc_command *cmd)
++{
++	uint32_t cmdat = host->cmdat;
++
++	host->cmdat &= ~JZ_MMC_CMDAT_INIT;
++	jz4740_mmc_clock_disable(host);
++
++	host->cmd = cmd;
++
++	if (cmd->flags & MMC_RSP_BUSY)
++		cmdat |= JZ_MMC_CMDAT_BUSY;
++
++	switch (mmc_resp_type(cmd)) {
++	case MMC_RSP_R1B:
++	case MMC_RSP_R1:
++		cmdat |= JZ_MMC_CMDAT_RSP_R1;
++		break;
++	case MMC_RSP_R2:
++		cmdat |= JZ_MMC_CMDAT_RSP_R2;
++		break;
++	case MMC_RSP_R3:
++		cmdat |= JZ_MMC_CMDAT_RSP_R3;
++		break;
++	default:
++		break;
++	}
++
++	if (cmd->data) {
++		cmdat |= JZ_MMC_CMDAT_DATA_EN;
++		if (cmd->data->flags & MMC_DATA_WRITE)
++			cmdat |= JZ_MMC_CMDAT_WRITE;
++		if (cmd->data->flags & MMC_DATA_STREAM)
++			cmdat |= JZ_MMC_CMDAT_STREAM;
++
++		writew(cmd->data->blksz, host->base + JZ_REG_MMC_BLKLEN);
++		writew(cmd->data->blocks, host->base + JZ_REG_MMC_NOB);
++	}
++
++	writeb(cmd->opcode, host->base + JZ_REG_MMC_CMD);
++	writel(cmd->arg, host->base + JZ_REG_MMC_ARG);
++	writel(cmdat, host->base + JZ_REG_MMC_CMDAT);
++
++	jz4740_mmc_clock_enable(host, 1);
++}
++
++static void jz_mmc_prepare_data_transfer(struct jz4740_mmc_host *host)
++{
++	struct mmc_command *cmd = host->req->cmd;
++	struct mmc_data *data = cmd->data;
++	int direction;
++
++	if (data->flags & MMC_DATA_READ)
++		direction = SG_MITER_TO_SG;
++	else
++		direction = SG_MITER_FROM_SG;
++
++	sg_miter_start(&host->miter, data->sg, data->sg_len, direction);
++}
++
++
++static irqreturn_t jz_mmc_irq_worker(int irq, void *devid)
++{
++	struct jz4740_mmc_host *host = (struct jz4740_mmc_host *)devid;
++	struct mmc_command *cmd = host->req->cmd;
++	struct mmc_request *req = host->req;
++	bool timeout = false;
++
++	if (cmd->error)
++		host->state = JZ4740_MMC_STATE_DONE;
++
++	switch (host->state) {
++	case JZ4740_MMC_STATE_READ_RESPONSE:
++		if (cmd->flags & MMC_RSP_PRESENT)
++			jz4740_mmc_read_response(host, cmd);
++
++		if (!cmd->data)
++			break;
++
++		jz_mmc_prepare_data_transfer(host);
++
++	case JZ4740_MMC_STATE_TRANSFER_DATA:
++		if (cmd->data->flags & MMC_DATA_READ)
++			timeout = jz4740_mmc_read_data(host, cmd->data);
++		else
++			timeout = jz4740_mmc_write_data(host, cmd->data);
++
++		if (unlikely(timeout)) {
++			host->state = JZ4740_MMC_STATE_TRANSFER_DATA;
++			break;
++		}
++
++		jz4740_mmc_transfer_check_state(host, cmd->data);
++
++		timeout = jz4740_mmc_poll_irq(host, JZ_MMC_IRQ_DATA_TRAN_DONE);
++		if (unlikely(timeout)) {
++			host->state = JZ4740_MMC_STATE_SEND_STOP;
++			break;
++		}
++		writew(JZ_MMC_IRQ_DATA_TRAN_DONE, host->base + JZ_REG_MMC_IREG);
++
++	case JZ4740_MMC_STATE_SEND_STOP:
++		if (!req->stop)
++			break;
++
++		jz4740_mmc_send_command(host, req->stop);
++
++		timeout = jz4740_mmc_poll_irq(host, JZ_MMC_IRQ_PRG_DONE);
++		if (timeout) {
++			host->state = JZ4740_MMC_STATE_DONE;
++			break;
++		}
++	case JZ4740_MMC_STATE_DONE:
++		break;
++	}
++
++	if (!timeout)
++		jz4740_mmc_request_done(host);
++
++	return IRQ_HANDLED;
++}
++
++static irqreturn_t jz_mmc_irq(int irq, void *devid)
++{
++	struct jz4740_mmc_host *host = devid;
++	struct mmc_command *cmd = host->cmd;
++	uint16_t irq_reg, status, tmp;
++
++	irq_reg = readw(host->base + JZ_REG_MMC_IREG);
++
++	tmp = irq_reg;
++	irq_reg &= ~host->irq_mask;
++
++	tmp &= ~(JZ_MMC_IRQ_TXFIFO_WR_REQ | JZ_MMC_IRQ_RXFIFO_RD_REQ |
++		JZ_MMC_IRQ_PRG_DONE | JZ_MMC_IRQ_DATA_TRAN_DONE);
++
++	if (tmp != irq_reg)
++		writew(tmp & ~irq_reg, host->base + JZ_REG_MMC_IREG);
++
++	if (irq_reg & JZ_MMC_IRQ_SDIO) {
++		writew(JZ_MMC_IRQ_SDIO, host->base + JZ_REG_MMC_IREG);
++		mmc_signal_sdio_irq(host->mmc);
++		irq_reg &= ~JZ_MMC_IRQ_SDIO;
++	}
++
++	if (host->req && cmd && irq_reg) {
++		if (test_and_clear_bit(0, &host->waiting)) {
++			del_timer(&host->timeout_timer);
++
++			status = readl(host->base + JZ_REG_MMC_STATUS);
++
++			if (status & JZ_MMC_STATUS_TIMEOUT_RES) {
++					cmd->error = -ETIMEDOUT;
++			} else if (status & JZ_MMC_STATUS_CRC_RES_ERR) {
++					cmd->error = -EIO;
++			} else if (status & (JZ_MMC_STATUS_CRC_READ_ERROR |
++				    JZ_MMC_STATUS_CRC_WRITE_ERROR)) {
++					if (cmd->data)
++							cmd->data->error = -EIO;
++					cmd->error = -EIO;
++			} else if (status & (JZ_MMC_STATUS_CRC_READ_ERROR |
++					JZ_MMC_STATUS_CRC_WRITE_ERROR)) {
++					if (cmd->data)
++							cmd->data->error = -EIO;
++					cmd->error = -EIO;
++			}
++
++			jz4740_mmc_set_irq_enabled(host, irq_reg, false);
++			writew(irq_reg, host->base + JZ_REG_MMC_IREG);
++
++			return IRQ_WAKE_THREAD;
++		}
++	}
++
++	return IRQ_HANDLED;
++}
++
++static int jz4740_mmc_set_clock_rate(struct jz4740_mmc_host *host, int rate)
++{
++	int div = 0;
++	int real_rate;
++
++	jz4740_mmc_clock_disable(host);
++	clk_set_rate(host->clk, JZ_MMC_CLK_RATE);
++
++	real_rate = clk_get_rate(host->clk);
++
++	while (real_rate > rate && div < 7) {
++		++div;
++		real_rate >>= 1;
++	}
++
++	writew(div, host->base + JZ_REG_MMC_CLKRT);
++	return real_rate;
++}
++
++static void jz4740_mmc_request(struct mmc_host *mmc, struct mmc_request *req)
++{
++	struct jz4740_mmc_host *host = mmc_priv(mmc);
++
++	host->req = req;
++
++	writew(0xffff, host->base + JZ_REG_MMC_IREG);
++
++	writew(JZ_MMC_IRQ_END_CMD_RES, host->base + JZ_REG_MMC_IREG);
++	jz4740_mmc_set_irq_enabled(host, JZ_MMC_IRQ_END_CMD_RES, true);
++
++	host->state = JZ4740_MMC_STATE_READ_RESPONSE;
++	set_bit(0, &host->waiting);
++	mod_timer(&host->timeout_timer, jiffies + 5*HZ);
++	jz4740_mmc_send_command(host, req->cmd);
++}
++
++static void jz4740_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
++{
++	struct jz4740_mmc_host *host = mmc_priv(mmc);
++	if (ios->clock)
++		jz4740_mmc_set_clock_rate(host, ios->clock);
++
++	switch (ios->power_mode) {
++	case MMC_POWER_UP:
++		jz4740_mmc_reset(host);
++		if (gpio_is_valid(host->pdata->gpio_power))
++			gpio_set_value(host->pdata->gpio_power,
++					!host->pdata->power_active_low);
++		host->cmdat |= JZ_MMC_CMDAT_INIT;
++		clk_enable(host->clk);
++		break;
++	case MMC_POWER_ON:
++		break;
++	default:
++		if (gpio_is_valid(host->pdata->gpio_power))
++			gpio_set_value(host->pdata->gpio_power,
++					host->pdata->power_active_low);
++		clk_disable(host->clk);
++		break;
++	}
++
++	switch (ios->bus_width) {
++	case MMC_BUS_WIDTH_1:
++		host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_4BIT;
++		break;
++	case MMC_BUS_WIDTH_4:
++		host->cmdat |= JZ_MMC_CMDAT_BUS_WIDTH_4BIT;
++		break;
++	default:
++		break;
++	}
++}
++
++static int jz4740_mmc_get_ro(struct mmc_host *mmc)
++{
++	struct jz4740_mmc_host *host = mmc_priv(mmc);
++	if (!gpio_is_valid(host->pdata->gpio_read_only))
++		return -ENOSYS;
++
++	return gpio_get_value(host->pdata->gpio_read_only) ^
++		host->pdata->read_only_active_low;
++}
++
++static int jz4740_mmc_get_cd(struct mmc_host *mmc)
++{
++	struct jz4740_mmc_host *host = mmc_priv(mmc);
++	if (!gpio_is_valid(host->pdata->gpio_card_detect))
++		return -ENOSYS;
++
++	return gpio_get_value(host->pdata->gpio_card_detect) ^
++			host->pdata->card_detect_active_low;
++}
++
++static irqreturn_t jz4740_mmc_card_detect_irq(int irq, void *devid)
++{
++	struct jz4740_mmc_host *host = devid;
++
++	mmc_detect_change(host->mmc, HZ / 2);
++
++	return IRQ_HANDLED;
++}
++
++static void jz4740_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
++{
++	struct jz4740_mmc_host *host = mmc_priv(mmc);
++	jz4740_mmc_set_irq_enabled(host, JZ_MMC_IRQ_SDIO, enable);
++}
++
++static const struct mmc_host_ops jz4740_mmc_ops = {
++	.request	= jz4740_mmc_request,
++	.set_ios	= jz4740_mmc_set_ios,
++	.get_ro		= jz4740_mmc_get_ro,
++	.get_cd		= jz4740_mmc_get_cd,
++	.enable_sdio_irq = jz4740_mmc_enable_sdio_irq,
++};
++
++static const struct jz_gpio_bulk_request jz4740_mmc_pins[] = {
++	JZ_GPIO_BULK_PIN(MSC_CMD),
++	JZ_GPIO_BULK_PIN(MSC_CLK),
++	JZ_GPIO_BULK_PIN(MSC_DATA0),
++	JZ_GPIO_BULK_PIN(MSC_DATA1),
++	JZ_GPIO_BULK_PIN(MSC_DATA2),
++	JZ_GPIO_BULK_PIN(MSC_DATA3),
++};
++
++static int __devinit jz4740_mmc_request_gpio(struct device *dev, int gpio,
++	const char *name, bool output, int value)
++{
++	int ret;
++
++	if (!gpio_is_valid(gpio))
++		return 0;
++
++	ret = gpio_request(gpio, name);
++	if (ret) {
++		dev_err(dev, "Failed to request %s gpio: %d\n", name, ret);
++		return ret;
++	}
++
++	if (output)
++		gpio_direction_output(gpio, value);
++	else
++		gpio_direction_input(gpio);
++
++	return 0;
++}
++
++static int __devinit jz4740_mmc_request_gpios(struct platform_device *pdev)
++{
++	int ret;
++	struct jz4740_mmc_platform_data *pdata = pdev->dev.platform_data;
++
++	if (!pdata)
++		return 0;
++
++	ret = jz4740_mmc_request_gpio(&pdev->dev, pdata->gpio_card_detect,
++			"MMC detect change", false, 0);
++	if (ret)
++		goto err;
++
++	ret = jz4740_mmc_request_gpio(&pdev->dev, pdata->gpio_read_only,
++			"MMC read only", false, 0);
++	if (ret)
++		goto err_free_gpio_card_detect;
++
++	ret = jz4740_mmc_request_gpio(&pdev->dev, pdata->gpio_power,
++			"MMC read only", true, pdata->power_active_low);
++	if (ret)
++		goto err_free_gpio_read_only;
++
++	return 0;
++
++err_free_gpio_read_only:
++	if (gpio_is_valid(pdata->gpio_read_only))
++		gpio_free(pdata->gpio_read_only);
++err_free_gpio_card_detect:
++	if (gpio_is_valid(pdata->gpio_card_detect))
++		gpio_free(pdata->gpio_card_detect);
++err:
++	return ret;
++}
++
++static int __devinit jz4740_mmc_request_cd_irq(struct platform_device *pdev,
++	struct jz4740_mmc_host *host)
++{
++	int ret;
++	struct jz4740_mmc_platform_data *pdata = pdev->dev.platform_data;
++
++	if (gpio_is_valid(pdata->gpio_card_detect))
++		return 0;
++
++	host->card_detect_irq = gpio_to_irq(pdata->gpio_card_detect);
++
++	if (host->card_detect_irq < 0) {
++		dev_warn(&pdev->dev, "Failed to get card detect irq\n");
++		return 0;
++	}
++	return request_irq(host->card_detect_irq, jz4740_mmc_card_detect_irq,
++			IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
++			"MMC card detect", host);
++
++
++	return ret;
++}
++
++static void jz4740_mmc_free_gpios(struct platform_device *pdev)
++{
++	struct jz4740_mmc_platform_data *pdata = pdev->dev.platform_data;
++
++	if (!pdata)
++		return;
++
++	if (gpio_is_valid(pdata->gpio_power))
++		gpio_free(pdata->gpio_power);
++	if (gpio_is_valid(pdata->gpio_read_only))
++		gpio_free(pdata->gpio_read_only);
++	if (gpio_is_valid(pdata->gpio_card_detect))
++		gpio_free(pdata->gpio_card_detect);
++}
++
++static inline size_t jz4740_mmc_num_pins(struct jz4740_mmc_host *host)
++{
++	size_t num_pins = ARRAY_SIZE(jz4740_mmc_pins);
++	if (host->pdata && host->pdata->data_1bit)
++		num_pins -= 3;
++
++	return num_pins;
++}
++
++static int __devinit jz4740_mmc_probe(struct platform_device* pdev)
++{
++	int ret;
++	struct mmc_host *mmc;
++	struct jz4740_mmc_host *host;
++	struct jz4740_mmc_platform_data *pdata;
++
++	pdata = pdev->dev.platform_data;
++
++	mmc = mmc_alloc_host(sizeof(struct jz4740_mmc_host), &pdev->dev);
++	if (!mmc) {
++		dev_err(&pdev->dev, "Failed to alloc mmc host structure\n");
++		return -ENOMEM;
++	}
++
++	host = mmc_priv(mmc);
++	host->pdata = pdata;
++
++	host->irq = platform_get_irq(pdev, 0);
++	if (host->irq < 0) {
++		ret = host->irq;
++		dev_err(&pdev->dev, "Failed to get platform irq: %d\n", ret);
++		goto err_free_host;
++	}
++
++	host->clk = clk_get(&pdev->dev, "mmc");
++	if (!host->clk) {
++		ret = -ENOENT;
++		dev_err(&pdev->dev, "Failed to get mmc clock\n");
++		goto err_free_host;
++	}
++
++	host->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	if (!host->mem) {
++		ret = -ENOENT;
++		dev_err(&pdev->dev, "Failed to get base platform memory\n");
++		goto err_clk_put;
++	}
++
++	host->mem = request_mem_region(host->mem->start,
++					resource_size(host->mem), pdev->name);
++	if (!host->mem) {
++		ret = -EBUSY;
++		dev_err(&pdev->dev, "Failed to request base memory region\n");
++		goto err_clk_put;
++	}
++
++	host->base = ioremap_nocache(host->mem->start, resource_size(host->mem));
++	if (!host->base) {
++		ret = -EBUSY;
++		dev_err(&pdev->dev, "Failed to ioremap base memory\n");
++		goto err_release_mem_region;
++	}
++
++	ret = jz_gpio_bulk_request(jz4740_mmc_pins, jz4740_mmc_num_pins(host));
++	if (ret) {
++		dev_err(&pdev->dev, "Failed to request mmc pins: %d\n", ret);
++		goto err_iounmap;
++	}
++
++	ret = jz4740_mmc_request_gpios(pdev);
++	if (ret)
++		goto err_gpio_bulk_free;
++
++	mmc->ops = &jz4740_mmc_ops;
++	mmc->f_min = JZ_MMC_CLK_RATE / 128;
++	mmc->f_max = JZ_MMC_CLK_RATE;
++	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
++	mmc->caps = (pdata && pdata->data_1bit) ? 0 : MMC_CAP_4_BIT_DATA;
++	mmc->caps |= MMC_CAP_SDIO_IRQ;
++
++	mmc->max_blk_size = (1 << 10) - 1;
++	mmc->max_blk_count = (1 << 15) - 1;
++	mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
++
++	mmc->max_phys_segs = 128;
++	mmc->max_hw_segs = 128;
++	mmc->max_seg_size = mmc->max_req_size;
++
++	host->mmc = mmc;
++	host->pdev = pdev;
++	spin_lock_init(&host->lock);
++	host->irq_mask = 0xffff;
++
++	ret = jz4740_mmc_request_cd_irq(pdev, host);
++	if (ret) {
++		dev_err(&pdev->dev, "Failed to request card detect irq\n");
++		goto err_free_gpios;
++	}
++
++	ret = request_threaded_irq(host->irq, jz_mmc_irq, jz_mmc_irq_worker, 0,
++			dev_name(&pdev->dev), host);
++	if (ret) {
++		dev_err(&pdev->dev, "Failed to request irq: %d\n", ret);
++		goto err_free_card_detect_irq;
++	}
++
++	jz4740_mmc_reset(host);
++	jz4740_mmc_clock_disable(host);
++	setup_timer(&host->timeout_timer, jz4740_mmc_timeout,
++			(unsigned long)host);
++	/* It is not important when it times out, it just needs to timeout. */
++	set_timer_slack(&host->timeout_timer, HZ);
++
++	platform_set_drvdata(pdev, host);
++	ret = mmc_add_host(mmc);
++
++	if (ret) {
++		dev_err(&pdev->dev, "Failed to add mmc host: %d\n", ret);
++		goto err_free_irq;
++	}
++	dev_info(&pdev->dev, "JZ SD/MMC card driver registered\n");
++
++	return 0;
++
++err_free_irq:
++	free_irq(host->irq, host);
++err_free_card_detect_irq:
++	if (host->card_detect_irq >= 0)
++		free_irq(host->card_detect_irq, host);
++err_free_gpios:
++	jz4740_mmc_free_gpios(pdev);
++err_gpio_bulk_free:
++	jz_gpio_bulk_free(jz4740_mmc_pins, jz4740_mmc_num_pins(host));
++err_iounmap:
++	iounmap(host->base);
++err_release_mem_region:
++	release_mem_region(host->mem->start, resource_size(host->mem));
++err_clk_put:
++	clk_put(host->clk);
++err_free_host:
++	platform_set_drvdata(pdev, NULL);
++	mmc_free_host(mmc);
++
++	return ret;
++}
++
++static int __devexit jz4740_mmc_remove(struct platform_device *pdev)
++{
++	struct jz4740_mmc_host *host = platform_get_drvdata(pdev);
++
++	del_timer_sync(&host->timeout_timer);
++	jz4740_mmc_set_irq_enabled(host, 0xff, false);
++	jz4740_mmc_reset(host);
++
++	mmc_remove_host(host->mmc);
++
++	free_irq(host->irq, host);
++	if (host->card_detect_irq >= 0)
++		free_irq(host->card_detect_irq, host);
++
++	jz4740_mmc_free_gpios(pdev);
++	jz_gpio_bulk_free(jz4740_mmc_pins, jz4740_mmc_num_pins(host));
++
++	iounmap(host->base);
++	release_mem_region(host->mem->start, resource_size(host->mem));
++
++	clk_put(host->clk);
++
++	platform_set_drvdata(pdev, NULL);
++	mmc_free_host(host->mmc);
++
++	return 0;
++}
++
++#ifdef CONFIG_PM
++
++static int jz4740_mmc_suspend(struct device *dev)
++{
++	struct jz4740_mmc_host *host = dev_get_drvdata(dev);
++
++	mmc_suspend_host(host->mmc);
++
++	jz_gpio_bulk_suspend(jz4740_mmc_pins, jz4740_mmc_num_pins(host));
++
++	return 0;
++}
++
++static int jz4740_mmc_resume(struct device *dev)
++{
++	struct jz4740_mmc_host *host = dev_get_drvdata(dev);
++
++	jz_gpio_bulk_resume(jz4740_mmc_pins, jz4740_mmc_num_pins(host));
++
++	mmc_resume_host(host->mmc);
++
++	return 0;
++}
++
++const struct dev_pm_ops jz4740_mmc_pm_ops = {
++	.suspend	= jz4740_mmc_suspend,
++	.resume		= jz4740_mmc_resume,
++	.poweroff	= jz4740_mmc_suspend,
++	.restore	= jz4740_mmc_resume,
++};
++
++#define JZ4740_MMC_PM_OPS (&jz4740_mmc_pm_ops)
++#else
++#define JZ4740_MMC_PM_OPS NULL
++#endif
++
++static struct platform_driver jz4740_mmc_driver = {
++	.probe = jz4740_mmc_probe,
++	.remove = __devexit_p(jz4740_mmc_remove),
++	.driver = {
++		.name = "jz4740-mmc",
++		.owner = THIS_MODULE,
++		.pm = JZ4740_MMC_PM_OPS,
++	},
++};
++
++static int __init jz4740_mmc_init(void)
++{
++	return platform_driver_register(&jz4740_mmc_driver);
++}
++module_init(jz4740_mmc_init);
++
++static void __exit jz4740_mmc_exit(void)
++{
++	platform_driver_unregister(&jz4740_mmc_driver);
++}
++module_exit(jz4740_mmc_exit);
++
++MODULE_DESCRIPTION("JZ4740 SD/MMC controller driver");
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");