init android origin source code

27 files changed, 11319 insertions, 0 deletions

diff --git a/ANDROID_3.4.5/drivers/mmc/core/Kconfig b/ANDROID_3.4.5/drivers/mmc/core/Kconfig
new file mode 100644
index 00000000..85c2e1ac
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/Kconfig
@@ -0,0 +1,46 @@
+#
+# MMC core configuration
+#
+
+config MMC_UNSAFE_RESUME
+	bool "Assume MMC/SD cards are non-removable (DANGEROUS)"
+	help
+	  If you say Y here, the MMC layer will assume that all cards
+	  stayed in their respective slots during the suspend. The
+	  normal behaviour is to remove them at suspend and
+	  redetecting them at resume. Breaking this assumption will
+	  in most cases result in data corruption.
+
+	  This option is usually just for embedded systems which use
+	  a MMC/SD card for rootfs. Most people should say N here.
+
+	  This option sets a default which can be overridden by the
+	  module parameter "removable=0" or "removable=1".
+
+config MMC_CLKGATE
+	bool "MMC host clock gating (EXPERIMENTAL)"
+	depends on EXPERIMENTAL
+	help
+	  This will attempt to aggressively gate the clock to the MMC card.
+	  This is done to save power due to gating off the logic and bus
+	  noise when the MMC card is not in use. Your host driver has to
+	  support handling this in order for it to be of any use.
+
+	  If unsure, say N.
+
+config MMC_EMBEDDED_SDIO
+	boolean "MMC embedded SDIO device support (EXPERIMENTAL)"
+	depends on EXPERIMENTAL
+	help
+	  If you say Y here, support will be added for embedded SDIO
+	  devices which do not contain the necessary enumeration
+	  support in hardware to be properly detected.
+
+config MMC_PARANOID_SD_INIT
+	bool "Enable paranoid SD card initialization (EXPERIMENTAL)"
+	depends on EXPERIMENTAL
+	help
+	  If you say Y here, the MMC layer will be extra paranoid
+	  about re-trying SD init requests. This can be a useful
+	  work-around for buggy controllers and hardware. Enable
+	  if you are experiencing issues with SD detection.
diff --git a/ANDROID_3.4.5/drivers/mmc/core/Makefile b/ANDROID_3.4.5/drivers/mmc/core/Makefile
new file mode 100644
index 00000000..dca44283
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/Makefile
@@ -0,0 +1,12 @@
+#
+# Makefile for the kernel mmc core.
+#
+
+obj-$(CONFIG_MMC)		+= mmc_core.o
+mmc_core-y			:= core.o bus.o host.o \
+				   mmc.o mmc_ops.o sd.o sd_ops.o \
+				   sdio.o sdio_ops.o sdio_bus.o \
+				   sdio_cis.o sdio_io.o sdio_irq.o \
+				   quirks.o cd-gpio.o
+
+mmc_core-$(CONFIG_DEBUG_FS)	+= debugfs.o
diff --git a/ANDROID_3.4.5/drivers/mmc/core/bus.c b/ANDROID_3.4.5/drivers/mmc/core/bus.c
new file mode 100644
index 00000000..c60cee92
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/bus.c
@@ -0,0 +1,356 @@
+/*
+ *  linux/drivers/mmc/core/bus.c
+ *
+ *  Copyright (C) 2003 Russell King, All Rights Reserved.
+ *  Copyright (C) 2007 Pierre Ossman
+ *
+ * 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.
+ *
+ *  MMC card bus driver model
+ */
+
+#include <linux/export.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/pm_runtime.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+
+#include "core.h"
+#include "sdio_cis.h"
+#include "bus.h"
+
+#define to_mmc_driver(d)	container_of(d, struct mmc_driver, drv)
+
+static ssize_t mmc_type_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct mmc_card *card = mmc_dev_to_card(dev);
+
+	switch (card->type) {
+	case MMC_TYPE_MMC:
+		return sprintf(buf, "MMC\n");
+	case MMC_TYPE_SD:
+		return sprintf(buf, "SD\n");
+	case MMC_TYPE_SDIO:
+		return sprintf(buf, "SDIO\n");
+	case MMC_TYPE_SD_COMBO:
+		return sprintf(buf, "SDcombo\n");
+	default:
+		return -EFAULT;
+	}
+}
+
+static struct device_attribute mmc_dev_attrs[] = {
+	__ATTR(type, S_IRUGO, mmc_type_show, NULL),
+	__ATTR_NULL,
+};
+
+/*
+ * This currently matches any MMC driver to any MMC card - drivers
+ * themselves make the decision whether to drive this card in their
+ * probe method.
+ */
+static int mmc_bus_match(struct device *dev, struct device_driver *drv)
+{
+	return 1;
+}
+
+static int
+mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+	struct mmc_card *card = mmc_dev_to_card(dev);
+	const char *type;
+	int retval = 0;
+
+	switch (card->type) {
+	case MMC_TYPE_MMC:
+		type = "MMC";
+		break;
+	case MMC_TYPE_SD:
+		type = "SD";
+		break;
+	case MMC_TYPE_SDIO:
+		type = "SDIO";
+		break;
+	case MMC_TYPE_SD_COMBO:
+		type = "SDcombo";
+		break;
+	default:
+		type = NULL;
+	}
+
+	if (type) {
+		retval = add_uevent_var(env, "MMC_TYPE=%s", type);
+		if (retval)
+			return retval;
+	}
+
+	retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card));
+	if (retval)
+		return retval;
+
+	/*
+	 * Request the mmc_block device.  Note: that this is a direct request
+	 * for the module it carries no information as to what is inserted.
+	 */
+	retval = add_uevent_var(env, "MODALIAS=mmc:block");
+
+	return retval;
+}
+
+static int mmc_bus_probe(struct device *dev)
+{
+	struct mmc_driver *drv = to_mmc_driver(dev->driver);
+	struct mmc_card *card = mmc_dev_to_card(dev);
+
+	return drv->probe(card);
+}
+
+static int mmc_bus_remove(struct device *dev)
+{
+	struct mmc_driver *drv = to_mmc_driver(dev->driver);
+	struct mmc_card *card = mmc_dev_to_card(dev);
+
+	drv->remove(card);
+
+	return 0;
+}
+
+static int mmc_bus_suspend(struct device *dev)
+{
+	struct mmc_driver *drv = to_mmc_driver(dev->driver);
+	struct mmc_card *card = mmc_dev_to_card(dev);
+	int ret = 0;
+
+	if (dev->driver && drv->suspend)
+		ret = drv->suspend(card);
+	return ret;
+}
+
+static int mmc_bus_resume(struct device *dev)
+{
+	struct mmc_driver *drv = to_mmc_driver(dev->driver);
+	struct mmc_card *card = mmc_dev_to_card(dev);
+	int ret = 0;
+
+	if (dev->driver && drv->resume)
+		ret = drv->resume(card);
+	return ret;
+}
+
+#ifdef CONFIG_PM_RUNTIME
+
+static int mmc_runtime_suspend(struct device *dev)
+{
+	struct mmc_card *card = mmc_dev_to_card(dev);
+
+	return mmc_power_save_host(card->host);
+}
+
+static int mmc_runtime_resume(struct device *dev)
+{
+	struct mmc_card *card = mmc_dev_to_card(dev);
+
+	return mmc_power_restore_host(card->host);
+}
+
+static int mmc_runtime_idle(struct device *dev)
+{
+	return pm_runtime_suspend(dev);
+}
+
+#endif /* !CONFIG_PM_RUNTIME */
+
+static const struct dev_pm_ops mmc_bus_pm_ops = {
+	SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume,
+			mmc_runtime_idle)
+	SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
+};
+
+static struct bus_type mmc_bus_type = {
+	.name		= "mmc",
+	.dev_attrs	= mmc_dev_attrs,
+	.match		= mmc_bus_match,
+	.uevent		= mmc_bus_uevent,
+	.probe		= mmc_bus_probe,
+	.remove		= mmc_bus_remove,
+	.pm		= &mmc_bus_pm_ops,
+};
+
+int mmc_register_bus(void)
+{
+	return bus_register(&mmc_bus_type);
+}
+
+void mmc_unregister_bus(void)
+{
+	bus_unregister(&mmc_bus_type);
+}
+
+/**
+ *	mmc_register_driver - register a media driver
+ *	@drv: MMC media driver
+ */
+int mmc_register_driver(struct mmc_driver *drv)
+{
+	drv->drv.bus = &mmc_bus_type;
+	return driver_register(&drv->drv);
+}
+
+EXPORT_SYMBOL(mmc_register_driver);
+
+/**
+ *	mmc_unregister_driver - unregister a media driver
+ *	@drv: MMC media driver
+ */
+void mmc_unregister_driver(struct mmc_driver *drv)
+{
+	drv->drv.bus = &mmc_bus_type;
+	driver_unregister(&drv->drv);
+}
+
+EXPORT_SYMBOL(mmc_unregister_driver);
+
+static void mmc_release_card(struct device *dev)
+{
+	struct mmc_card *card = mmc_dev_to_card(dev);
+
+	sdio_free_common_cis(card);
+
+	if (card->info)
+		kfree(card->info);
+
+	kfree(card);
+}
+
+/*
+ * Allocate and initialise a new MMC card structure.
+ */
+struct mmc_card *mmc_alloc_card(struct mmc_host *host, struct device_type *type)
+{
+	struct mmc_card *card;
+
+	card = kzalloc(sizeof(struct mmc_card), GFP_KERNEL);
+	if (!card)
+		return ERR_PTR(-ENOMEM);
+
+	card->host = host;
+
+	device_initialize(&card->dev);
+
+	card->dev.parent = mmc_classdev(host);
+	card->dev.bus = &mmc_bus_type;
+	card->dev.release = mmc_release_card;
+	card->dev.type = type;
+
+	return card;
+}
+
+/*
+ * Register a new MMC card with the driver model.
+ */
+int mmc_add_card(struct mmc_card *card)
+{
+	int ret;
+	const char *type;
+	const char *uhs_bus_speed_mode = "";
+	static const char *const uhs_speeds[] = {
+		[UHS_SDR12_BUS_SPEED] = "SDR12 ",
+		[UHS_SDR25_BUS_SPEED] = "SDR25 ",
+		[UHS_SDR50_BUS_SPEED] = "SDR50 ",
+		[UHS_SDR104_BUS_SPEED] = "SDR104 ",
+		[UHS_DDR50_BUS_SPEED] = "DDR50 ",
+	};
+
+
+	dev_set_name(&card->dev, "%s:%04x", mmc_hostname(card->host), card->rca);
+
+	switch (card->type) {
+	case MMC_TYPE_MMC:
+		type = "MMC";
+		break;
+	case MMC_TYPE_SD:
+		type = "SD";
+		if (mmc_card_blockaddr(card)) {
+			if (mmc_card_ext_capacity(card))
+				type = "SDXC";
+			else
+				type = "SDHC";
+		}
+		break;
+	case MMC_TYPE_SDIO:
+		type = "SDIO";
+		break;
+	case MMC_TYPE_SD_COMBO:
+		type = "SD-combo";
+		if (mmc_card_blockaddr(card))
+			type = "SDHC-combo";
+		break;
+	default:
+		type = "?";
+		break;
+	}
+
+	if (mmc_sd_card_uhs(card) &&
+		(card->sd_bus_speed < ARRAY_SIZE(uhs_speeds)))
+		uhs_bus_speed_mode = uhs_speeds[card->sd_bus_speed];
+
+	if (mmc_host_is_spi(card->host)) {
+		pr_info("%s: new %s%s%s card on SPI\n",
+			mmc_hostname(card->host),
+			mmc_card_highspeed(card) ? "high speed " : "",
+			mmc_card_ddr_mode(card) ? "DDR " : "",
+			type);
+	} else {
+		pr_info("%s: new %s%s%s%s%s card at address %04x\n",
+			mmc_hostname(card->host),
+			mmc_card_uhs(card) ? "ultra high speed " :
+			(mmc_card_highspeed(card) ? "high speed " : ""),
+			(mmc_card_hs200(card) ? "HS200 " : ""),
+			mmc_card_ddr_mode(card) ? "DDR " : "",
+			uhs_bus_speed_mode, type, card->rca);
+	}
+
+#ifdef CONFIG_DEBUG_FS
+	mmc_add_card_debugfs(card);
+#endif
+
+	ret = device_add(&card->dev);
+	if (ret)
+		return ret;
+
+	mmc_card_set_present(card);
+
+	return 0;
+}
+
+/*
+ * Unregister a new MMC card with the driver model, and
+ * (eventually) free it.
+ */
+void mmc_remove_card(struct mmc_card *card)
+{
+#ifdef CONFIG_DEBUG_FS
+	mmc_remove_card_debugfs(card);
+#endif
+
+	if (mmc_card_present(card)) {
+		if (mmc_host_is_spi(card->host)) {
+			pr_info("%s: SPI card removed\n",
+				mmc_hostname(card->host));
+		} else {
+			pr_info("%s: card %04x removed\n",
+				mmc_hostname(card->host), card->rca);
+		}
+		device_del(&card->dev);
+	}
+
+	put_device(&card->dev);
+}
+
diff --git a/ANDROID_3.4.5/drivers/mmc/core/bus.h b/ANDROID_3.4.5/drivers/mmc/core/bus.h
new file mode 100644
index 00000000..00a19710
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/bus.h
@@ -0,0 +1,31 @@
+/*
+ *  linux/drivers/mmc/core/bus.h
+ *
+ *  Copyright (C) 2003 Russell King, All Rights Reserved.
+ *  Copyright 2007 Pierre Ossman
+ *
+ * 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.
+ */
+#ifndef _MMC_CORE_BUS_H
+#define _MMC_CORE_BUS_H
+
+#define MMC_DEV_ATTR(name, fmt, args...)					\
+static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf)	\
+{										\
+	struct mmc_card *card = mmc_dev_to_card(dev);				\
+	return sprintf(buf, fmt, args);						\
+}										\
+static DEVICE_ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
+
+struct mmc_card *mmc_alloc_card(struct mmc_host *host,
+	struct device_type *type);
+int mmc_add_card(struct mmc_card *card);
+void mmc_remove_card(struct mmc_card *card);
+
+int mmc_register_bus(void);
+void mmc_unregister_bus(void);
+
+#endif
+
diff --git a/ANDROID_3.4.5/drivers/mmc/core/cd-gpio.c b/ANDROID_3.4.5/drivers/mmc/core/cd-gpio.c
new file mode 100644
index 00000000..f13e38de
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/cd-gpio.c
@@ -0,0 +1,83 @@
+/*
+ * Generic GPIO card-detect helper
+ *
+ * Copyright (C) 2011, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * 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/err.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/jiffies.h>
+#include <linux/mmc/cd-gpio.h>
+#include <linux/mmc/host.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+struct mmc_cd_gpio {
+	unsigned int gpio;
+	char label[0];
+};
+
+static irqreturn_t mmc_cd_gpio_irqt(int irq, void *dev_id)
+{
+	/* Schedule a card detection after a debounce timeout */
+	mmc_detect_change(dev_id, msecs_to_jiffies(100));
+	return IRQ_HANDLED;
+}
+
+int mmc_cd_gpio_request(struct mmc_host *host, unsigned int gpio)
+{
+	size_t len = strlen(dev_name(host->parent)) + 4;
+	struct mmc_cd_gpio *cd;
+	int irq = gpio_to_irq(gpio);
+	int ret;
+
+	if (irq < 0)
+		return irq;
+
+	cd = kmalloc(sizeof(*cd) + len, GFP_KERNEL);
+	if (!cd)
+		return -ENOMEM;
+
+	snprintf(cd->label, len, "%s cd", dev_name(host->parent));
+
+	ret = gpio_request_one(gpio, GPIOF_DIR_IN, cd->label);
+	if (ret < 0)
+		goto egpioreq;
+
+	ret = request_threaded_irq(irq, NULL, mmc_cd_gpio_irqt,
+				   IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+				   cd->label, host);
+	if (ret < 0)
+		goto eirqreq;
+
+	cd->gpio = gpio;
+	host->hotplug.irq = irq;
+	host->hotplug.handler_priv = cd;
+
+	return 0;
+
+eirqreq:
+	gpio_free(gpio);
+egpioreq:
+	kfree(cd);
+	return ret;
+}
+EXPORT_SYMBOL(mmc_cd_gpio_request);
+
+void mmc_cd_gpio_free(struct mmc_host *host)
+{
+	struct mmc_cd_gpio *cd = host->hotplug.handler_priv;
+
+	if (!cd)
+		return;
+
+	free_irq(host->hotplug.irq, host);
+	gpio_free(cd->gpio);
+	kfree(cd);
+}
+EXPORT_SYMBOL(mmc_cd_gpio_free);
diff --git a/ANDROID_3.4.5/drivers/mmc/core/core.c b/ANDROID_3.4.5/drivers/mmc/core/core.c
new file mode 100644
index 00000000..95902a7e
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/core.c
@@ -0,0 +1,2537 @@
+/*
+ *  linux/drivers/mmc/core/core.c
+ *
+ *  Copyright (C) 2003-2004 Russell King, All Rights Reserved.
+ *  SD support Copyright (C) 2004 Ian Molton, All Rights Reserved.
+ *  Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
+ *  MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
+ *
+ * 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/init.h>
+#include <linux/interrupt.h>
+#include <linux/completion.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/pagemap.h>
+#include <linux/err.h>
+#include <linux/leds.h>
+#include <linux/scatterlist.h>
+#include <linux/log2.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
+#include <linux/suspend.h>
+#include <linux/fault-inject.h>
+#include <linux/random.h>
+#include <linux/wakelock.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sd.h>
+
+#include "core.h"
+#include "bus.h"
+#include "host.h"
+#include "sdio_bus.h"
+
+#include "mmc_ops.h"
+#include "sd_ops.h"
+#include "sdio_ops.h"
+
+static struct workqueue_struct *workqueue;
+
+/*
+ * Enabling software CRCs on the data blocks can be a significant (30%)
+ * performance cost, and for other reasons may not always be desired.
+ * So we allow it it to be disabled.
+ */
+bool use_spi_crc = 1;
+module_param(use_spi_crc, bool, 0);
+
+/*
+ * We normally treat cards as removed during suspend if they are not
+ * known to be on a non-removable bus, to avoid the risk of writing
+ * back data to a different card after resume.  Allow this to be
+ * overridden if necessary.
+ */
+#ifdef CONFIG_MMC_UNSAFE_RESUME
+bool mmc_assume_removable;
+#else
+bool mmc_assume_removable = 1;
+#endif
+EXPORT_SYMBOL(mmc_assume_removable);
+module_param_named(removable, mmc_assume_removable, bool, 0644);
+MODULE_PARM_DESC(
+	removable,
+	"MMC/SD cards are removable and may be removed during suspend");
+
+/*
+ * Internal function. Schedule delayed work in the MMC work queue.
+ */
+static int mmc_schedule_delayed_work(struct delayed_work *work,
+				     unsigned long delay)
+{
+	return queue_delayed_work(workqueue, work, delay);
+}
+
+/*
+ * Internal function. Flush all scheduled work from the MMC work queue.
+ */
+static void mmc_flush_scheduled_work(void)
+{
+	flush_workqueue(workqueue);
+}
+
+#ifdef CONFIG_FAIL_MMC_REQUEST
+
+/*
+ * Internal function. Inject random data errors.
+ * If mmc_data is NULL no errors are injected.
+ */
+static void mmc_should_fail_request(struct mmc_host *host,
+				    struct mmc_request *mrq)
+{
+	struct mmc_command *cmd = mrq->cmd;
+	struct mmc_data *data = mrq->data;
+	static const int data_errors[] = {
+		-ETIMEDOUT,
+		-EILSEQ,
+		-EIO,
+	};
+
+	if (!data)
+		return;
+
+	if (cmd->error || data->error ||
+	    !should_fail(&host->fail_mmc_request, data->blksz * data->blocks))
+		return;
+
+	data->error = data_errors[random32() % ARRAY_SIZE(data_errors)];
+	data->bytes_xfered = (random32() % (data->bytes_xfered >> 9)) << 9;
+}
+
+#else /* CONFIG_FAIL_MMC_REQUEST */
+
+static inline void mmc_should_fail_request(struct mmc_host *host,
+					   struct mmc_request *mrq)
+{
+}
+
+#endif /* CONFIG_FAIL_MMC_REQUEST */
+
+/**
+ *	mmc_request_done - finish processing an MMC request
+ *	@host: MMC host which completed request
+ *	@mrq: MMC request which request
+ *
+ *	MMC drivers should call this function when they have completed
+ *	their processing of a request.
+ */
+void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq)
+{
+	struct mmc_command *cmd = mrq->cmd;
+	int err = cmd->error;
+
+	if (err && cmd->retries && mmc_host_is_spi(host)) {
+		if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
+			cmd->retries = 0;
+	}
+
+	if (err && cmd->retries && !mmc_card_removed(host->card)) {
+		/*
+		 * Request starter must handle retries - see
+		 * mmc_wait_for_req_done().
+		 */
+		if (mrq->done)
+			mrq->done(mrq);
+	} else {
+		mmc_should_fail_request(host, mrq);
+
+		led_trigger_event(host->led, LED_OFF);
+
+		pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n",
+			mmc_hostname(host), cmd->opcode, err,
+			cmd->resp[0], cmd->resp[1],
+			cmd->resp[2], cmd->resp[3]);
+
+		if (mrq->data) {
+			pr_debug("%s:     %d bytes transferred: %d\n",
+				mmc_hostname(host),
+				mrq->data->bytes_xfered, mrq->data->error);
+		}
+
+		if (mrq->stop) {
+			pr_debug("%s:     (CMD%u): %d: %08x %08x %08x %08x\n",
+				mmc_hostname(host), mrq->stop->opcode,
+				mrq->stop->error,
+				mrq->stop->resp[0], mrq->stop->resp[1],
+				mrq->stop->resp[2], mrq->stop->resp[3]);
+		}
+
+		if (mrq->done)
+			mrq->done(mrq);
+
+		mmc_host_clk_release(host);
+	}
+}
+
+EXPORT_SYMBOL(mmc_request_done);
+
+static void
+mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
+{
+#ifdef CONFIG_MMC_DEBUG
+	unsigned int i, sz;
+	struct scatterlist *sg;
+#endif
+
+	if (mrq->sbc) {
+		pr_debug("<%s: starting CMD%u arg %08x flags %08x>\n",
+			 mmc_hostname(host), mrq->sbc->opcode,
+			 mrq->sbc->arg, mrq->sbc->flags);
+	}
+
+	pr_debug("%s: starting CMD%u arg %08x flags %08x\n",
+		 mmc_hostname(host), mrq->cmd->opcode,
+		 mrq->cmd->arg, mrq->cmd->flags);
+
+	if (mrq->data) {
+		pr_debug("%s:     blksz %d blocks %d flags %08x "
+			"tsac %d ms nsac %d\n",
+			mmc_hostname(host), mrq->data->blksz,
+			mrq->data->blocks, mrq->data->flags,
+			mrq->data->timeout_ns / 1000000,
+			mrq->data->timeout_clks);
+	}
+
+	if (mrq->stop) {
+		pr_debug("%s:     CMD%u arg %08x flags %08x\n",
+			 mmc_hostname(host), mrq->stop->opcode,
+			 mrq->stop->arg, mrq->stop->flags);
+	}
+
+	WARN_ON(!host->claimed);
+
+	mrq->cmd->error = 0;
+	mrq->cmd->mrq = mrq;
+	if (mrq->data) {
+		BUG_ON(mrq->data->blksz > host->max_blk_size);
+		BUG_ON(mrq->data->blocks > host->max_blk_count);
+		BUG_ON(mrq->data->blocks * mrq->data->blksz >
+			host->max_req_size);
+
+#ifdef CONFIG_MMC_DEBUG
+		sz = 0;
+		for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i)
+			sz += sg->length;
+		BUG_ON(sz != mrq->data->blocks * mrq->data->blksz);
+#endif
+
+		mrq->cmd->data = mrq->data;
+		mrq->data->error = 0;
+		mrq->data->mrq = mrq;
+		if (mrq->stop) {
+			mrq->data->stop = mrq->stop;
+			mrq->stop->error = 0;
+			mrq->stop->mrq = mrq;
+		}
+	}
+	mmc_host_clk_hold(host);
+	led_trigger_event(host->led, LED_FULL);
+	host->ops->request(host, mrq);
+}
+
+static void mmc_wait_done(struct mmc_request *mrq)
+{
+	complete(&mrq->completion);
+}
+
+static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq)
+{
+	init_completion(&mrq->completion);
+	mrq->done = mmc_wait_done;
+	if (mmc_card_removed(host->card)) {
+		mrq->cmd->error = -ENOMEDIUM;
+		complete(&mrq->completion);
+		return -ENOMEDIUM;
+	}
+	mmc_start_request(host, mrq);
+	return 0;
+}
+
+static void mmc_wait_for_req_done(struct mmc_host *host,
+				  struct mmc_request *mrq)
+{
+	struct mmc_command *cmd;
+
+	while (1) {
+		wait_for_completion(&mrq->completion);
+
+		cmd = mrq->cmd;
+		if (!cmd->error || !cmd->retries ||
+		    mmc_card_removed(host->card))
+			break;
+
+		pr_debug("%s: req failed (CMD%u): %d, retrying...\n",
+			 mmc_hostname(host), cmd->opcode, cmd->error);
+		cmd->retries--;
+		cmd->error = 0;
+		host->ops->request(host, mrq);
+	}
+}
+
+/**
+ *	mmc_pre_req - Prepare for a new request
+ *	@host: MMC host to prepare command
+ *	@mrq: MMC request to prepare for
+ *	@is_first_req: true if there is no previous started request
+ *                     that may run in parellel to this call, otherwise false
+ *
+ *	mmc_pre_req() is called in prior to mmc_start_req() to let
+ *	host prepare for the new request. Preparation of a request may be
+ *	performed while another request is running on the host.
+ */
+static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq,
+		 bool is_first_req)
+{
+	if (host->ops->pre_req) {
+		mmc_host_clk_hold(host);
+		host->ops->pre_req(host, mrq, is_first_req);
+		mmc_host_clk_release(host);
+	}
+}
+
+/**
+ *	mmc_post_req - Post process a completed request
+ *	@host: MMC host to post process command
+ *	@mrq: MMC request to post process for
+ *	@err: Error, if non zero, clean up any resources made in pre_req
+ *
+ *	Let the host post process a completed request. Post processing of
+ *	a request may be performed while another reuqest is running.
+ */
+static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq,
+			 int err)
+{
+	if (host->ops->post_req) {
+		mmc_host_clk_hold(host);
+		host->ops->post_req(host, mrq, err);
+		mmc_host_clk_release(host);
+	}
+}
+
+/**
+ *	mmc_start_req - start a non-blocking request
+ *	@host: MMC host to start command
+ *	@areq: async request to start
+ *	@error: out parameter returns 0 for success, otherwise non zero
+ *
+ *	Start a new MMC custom command request for a host.
+ *	If there is on ongoing async request wait for completion
+ *	of that request and start the new one and return.
+ *	Does not wait for the new request to complete.
+ *
+ *      Returns the completed request, NULL in case of none completed.
+ *	Wait for the an ongoing request (previoulsy started) to complete and
+ *	return the completed request. If there is no ongoing request, NULL
+ *	is returned without waiting. NULL is not an error condition.
+ */
+struct mmc_async_req *mmc_start_req(struct mmc_host *host,
+				    struct mmc_async_req *areq, int *error)
+{
+	int err = 0;
+	int start_err = 0;
+	struct mmc_async_req *data = host->areq;
+
+	/* Prepare a new request */
+	if (areq)
+		mmc_pre_req(host, areq->mrq, !host->areq);
+
+	if (host->areq) {
+		mmc_wait_for_req_done(host, host->areq->mrq);
+		err = host->areq->err_check(host->card, host->areq);
+	}
+
+	if (!err && areq)
+		start_err = __mmc_start_req(host, areq->mrq);
+
+	if (host->areq)
+		mmc_post_req(host, host->areq->mrq, 0);
+
+	 /* Cancel a prepared request if it was not started. */
+	if ((err || start_err) && areq)
+			mmc_post_req(host, areq->mrq, -EINVAL);
+
+	if (err)
+		host->areq = NULL;
+	else
+		host->areq = areq;
+
+	if (error)
+		*error = err;
+	return data;
+}
+EXPORT_SYMBOL(mmc_start_req);
+
+/**
+ *	mmc_wait_for_req - start a request and wait for completion
+ *	@host: MMC host to start command
+ *	@mrq: MMC request to start
+ *
+ *	Start a new MMC custom command request for a host, and wait
+ *	for the command to complete. Does not attempt to parse the
+ *	response.
+ */
+void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
+{
+	__mmc_start_req(host, mrq);
+	mmc_wait_for_req_done(host, mrq);
+}
+EXPORT_SYMBOL(mmc_wait_for_req);
+
+/**
+ *	mmc_interrupt_hpi - Issue for High priority Interrupt
+ *	@card: the MMC card associated with the HPI transfer
+ *
+ *	Issued High Priority Interrupt, and check for card status
+ *	util out-of prg-state.
+ */
+int mmc_interrupt_hpi(struct mmc_card *card)
+{
+	int err;
+	u32 status;
+
+	BUG_ON(!card);
+
+	if (!card->ext_csd.hpi_en) {
+		pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host));
+		return 1;
+	}
+
+	mmc_claim_host(card->host);
+	err = mmc_send_status(card, &status);
+	if (err) {
+		pr_err("%s: Get card status fail\n", mmc_hostname(card->host));
+		goto out;
+	}
+
+	/*
+	 * If the card status is in PRG-state, we can send the HPI command.
+	 */
+	if (R1_CURRENT_STATE(status) == R1_STATE_PRG) {
+		do {
+			/*
+			 * We don't know when the HPI command will finish
+			 * processing, so we need to resend HPI until out
+			 * of prg-state, and keep checking the card status
+			 * with SEND_STATUS.  If a timeout error occurs when
+			 * sending the HPI command, we are already out of
+			 * prg-state.
+			 */
+			err = mmc_send_hpi_cmd(card, &status);
+			if (err)
+				pr_debug("%s: abort HPI (%d error)\n",
+					 mmc_hostname(card->host), err);
+
+			err = mmc_send_status(card, &status);
+			if (err)
+				break;
+		} while (R1_CURRENT_STATE(status) == R1_STATE_PRG);
+	} else
+		pr_debug("%s: Left prg-state\n", mmc_hostname(card->host));
+
+out:
+	mmc_release_host(card->host);
+	return err;
+}
+EXPORT_SYMBOL(mmc_interrupt_hpi);
+
+/**
+ *	mmc_wait_for_cmd - start a command and wait for completion
+ *	@host: MMC host to start command
+ *	@cmd: MMC command to start
+ *	@retries: maximum number of retries
+ *
+ *	Start a new MMC command for a host, and wait for the command
+ *	to complete.  Return any error that occurred while the command
+ *	was executing.  Do not attempt to parse the response.
+ */
+int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries)
+{
+	struct mmc_request mrq = {NULL};
+
+	WARN_ON(!host->claimed);
+
+	memset(cmd->resp, 0, sizeof(cmd->resp));
+	cmd->retries = retries;
+
+	mrq.cmd = cmd;
+	cmd->data = NULL;
+
+	mmc_wait_for_req(host, &mrq);
+
+	return cmd->error;
+}
+
+EXPORT_SYMBOL(mmc_wait_for_cmd);
+
+/**
+ *	mmc_set_data_timeout - set the timeout for a data command
+ *	@data: data phase for command
+ *	@card: the MMC card associated with the data transfer
+ *
+ *	Computes the data timeout parameters according to the
+ *	correct algorithm given the card type.
+ */
+void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card)
+{
+	unsigned int mult;
+
+	/*
+	 * SDIO cards only define an upper 1 s limit on access.
+	 */
+	if (mmc_card_sdio(card)) {
+		data->timeout_ns = 1000000000;
+		data->timeout_clks = 0;
+		return;
+	}
+
+	/*
+	 * SD cards use a 100 multiplier rather than 10
+	 */
+	mult = mmc_card_sd(card) ? 100 : 10;
+
+	/*
+	 * Scale up the multiplier (and therefore the timeout) by
+	 * the r2w factor for writes.
+	 */
+	if (data->flags & MMC_DATA_WRITE)
+		mult <<= card->csd.r2w_factor;
+
+	data->timeout_ns = card->csd.tacc_ns * mult;
+	data->timeout_clks = card->csd.tacc_clks * mult;
+
+	/*
+	 * SD cards also have an upper limit on the timeout.
+	 */
+	if (mmc_card_sd(card)) {
+		unsigned int timeout_us, limit_us;
+
+		timeout_us = data->timeout_ns / 1000;
+		if (mmc_host_clk_rate(card->host))
+			timeout_us += data->timeout_clks * 1000 /
+				(mmc_host_clk_rate(card->host) / 1000);
+
+		if (data->flags & MMC_DATA_WRITE)
+			/*
+			 * The MMC spec "It is strongly recommended
+			 * for hosts to implement more than 500ms
+			 * timeout value even if the card indicates
+			 * the 250ms maximum busy length."  Even the
+			 * previous value of 300ms is known to be
+			 * insufficient for some cards.
+			 */
+			limit_us = 3000000;
+		else
+			limit_us = 100000;
+
+		/*
+		 * SDHC cards always use these fixed values.
+		 */
+		if (timeout_us > limit_us || mmc_card_blockaddr(card)) {
+			data->timeout_ns = limit_us * 1000;
+			data->timeout_clks = 0;
+		}
+	}
+
+	/*
+	 * Some cards require longer data read timeout than indicated in CSD.
+	 * Address this by setting the read timeout to a "reasonably high"
+	 * value. For the cards tested, 300ms has proven enough. If necessary,
+	 * this value can be increased if other problematic cards require this.
+	 */
+	if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) {
+		data->timeout_ns = 300000000;
+		data->timeout_clks = 0;
+	}
+
+	/*
+	 * Some cards need very high timeouts if driven in SPI mode.
+	 * The worst observed timeout was 900ms after writing a
+	 * continuous stream of data until the internal logic
+	 * overflowed.
+	 */
+	if (mmc_host_is_spi(card->host)) {
+		if (data->flags & MMC_DATA_WRITE) {
+			if (data->timeout_ns < 1000000000)
+				data->timeout_ns = 1000000000;	/* 1s */
+		} else {
+			if (data->timeout_ns < 100000000)
+				data->timeout_ns =  100000000;	/* 100ms */
+		}
+	}
+}
+EXPORT_SYMBOL(mmc_set_data_timeout);
+
+/**
+ *	mmc_align_data_size - pads a transfer size to a more optimal value
+ *	@card: the MMC card associated with the data transfer
+ *	@sz: original transfer size
+ *
+ *	Pads the original data size with a number of extra bytes in
+ *	order to avoid controller bugs and/or performance hits
+ *	(e.g. some controllers revert to PIO for certain sizes).
+ *
+ *	Returns the improved size, which might be unmodified.
+ *
+ *	Note that this function is only relevant when issuing a
+ *	single scatter gather entry.
+ */
+unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz)
+{
+	/*
+	 * FIXME: We don't have a system for the controller to tell
+	 * the core about its problems yet, so for now we just 32-bit
+	 * align the size.
+	 */
+	sz = ((sz + 3) / 4) * 4;
+
+	return sz;
+}
+EXPORT_SYMBOL(mmc_align_data_size);
+
+/**
+ *	__mmc_claim_host - exclusively claim a host
+ *	@host: mmc host to claim
+ *	@abort: whether or not the operation should be aborted
+ *
+ *	Claim a host for a set of operations.  If @abort is non null and
+ *	dereference a non-zero value then this will return prematurely with
+ *	that non-zero value without acquiring the lock.  Returns zero
+ *	with the lock held otherwise.
+ */
+int __mmc_claim_host(struct mmc_host *host, atomic_t *abort)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	unsigned long flags;
+	int stop;
+
+	might_sleep();
+
+	add_wait_queue(&host->wq, &wait);
+	spin_lock_irqsave(&host->lock, flags);
+	while (1) {
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		stop = abort ? atomic_read(abort) : 0;
+		if (stop || !host->claimed || host->claimer == current)
+			break;
+		spin_unlock_irqrestore(&host->lock, flags);
+		schedule();
+		spin_lock_irqsave(&host->lock, flags);
+	}
+	set_current_state(TASK_RUNNING);
+	if (!stop) {
+		host->claimed = 1;
+		host->claimer = current;
+		host->claim_cnt += 1;
+	} else
+		wake_up(&host->wq);
+	spin_unlock_irqrestore(&host->lock, flags);
+	remove_wait_queue(&host->wq, &wait);
+	if (host->ops->enable && !stop && host->claim_cnt == 1)
+		host->ops->enable(host);
+	return stop;
+}
+
+EXPORT_SYMBOL(__mmc_claim_host);
+
+/**
+ *	mmc_try_claim_host - try exclusively to claim a host
+ *	@host: mmc host to claim
+ *
+ *	Returns %1 if the host is claimed, %0 otherwise.
+ */
+int mmc_try_claim_host(struct mmc_host *host)
+{
+	int claimed_host = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+	if (!host->claimed || host->claimer == current) {
+		host->claimed = 1;
+		host->claimer = current;
+		host->claim_cnt += 1;
+		claimed_host = 1;
+	}
+	spin_unlock_irqrestore(&host->lock, flags);
+	if (host->ops->enable && claimed_host && host->claim_cnt == 1)
+		host->ops->enable(host);
+	return claimed_host;
+}
+EXPORT_SYMBOL(mmc_try_claim_host);
+
+/**
+ *	mmc_release_host - release a host
+ *	@host: mmc host to release
+ *
+ *	Release a MMC host, allowing others to claim the host
+ *	for their operations.
+ */
+void mmc_release_host(struct mmc_host *host)
+{
+	unsigned long flags;
+
+	WARN_ON(!host->claimed);
+
+	if (host->ops->disable && host->claim_cnt == 1)
+		host->ops->disable(host);
+
+	spin_lock_irqsave(&host->lock, flags);
+	if (--host->claim_cnt) {
+		/* Release for nested claim */
+		spin_unlock_irqrestore(&host->lock, flags);
+	} else {
+		host->claimed = 0;
+		host->claimer = NULL;
+		spin_unlock_irqrestore(&host->lock, flags);
+		wake_up(&host->wq);
+	}
+}
+EXPORT_SYMBOL(mmc_release_host);
+
+/*
+ * Internal function that does the actual ios call to the host driver,
+ * optionally printing some debug output.
+ */
+static inline void mmc_set_ios(struct mmc_host *host)
+{
+	struct mmc_ios *ios = &host->ios;
+
+	pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u "
+		"width %u timing %u\n",
+		 mmc_hostname(host), ios->clock, ios->bus_mode,
+		 ios->power_mode, ios->chip_select, ios->vdd,
+		 ios->bus_width, ios->timing);
+
+	if (ios->clock > 0)
+		mmc_set_ungated(host);
+	host->ops->set_ios(host, ios);
+}
+
+/*
+ * Control chip select pin on a host.
+ */
+void mmc_set_chip_select(struct mmc_host *host, int mode)
+{
+	mmc_host_clk_hold(host);
+	host->ios.chip_select = mode;
+	mmc_set_ios(host);
+	mmc_host_clk_release(host);
+}
+
+/*
+ * Sets the host clock to the highest possible frequency that
+ * is below "hz".
+ */
+static void __mmc_set_clock(struct mmc_host *host, unsigned int hz)
+{
+	WARN_ON(hz < host->f_min);
+
+	if (hz > host->f_max)
+		hz = host->f_max;
+
+	host->ios.clock = hz;
+	mmc_set_ios(host);
+}
+
+void mmc_set_clock(struct mmc_host *host, unsigned int hz)
+{
+	mmc_host_clk_hold(host);
+	__mmc_set_clock(host, hz);
+	mmc_host_clk_release(host);
+}
+
+#ifdef CONFIG_MMC_CLKGATE
+/*
+ * This gates the clock by setting it to 0 Hz.
+ */
+void mmc_gate_clock(struct mmc_host *host)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->clk_lock, flags);
+	host->clk_old = host->ios.clock;
+	host->ios.clock = 0;
+	host->clk_gated = true;
+	spin_unlock_irqrestore(&host->clk_lock, flags);
+	mmc_set_ios(host);
+}
+
+/*
+ * This restores the clock from gating by using the cached
+ * clock value.
+ */
+void mmc_ungate_clock(struct mmc_host *host)
+{
+	/*
+	 * We should previously have gated the clock, so the clock shall
+	 * be 0 here! The clock may however be 0 during initialization,
+	 * when some request operations are performed before setting
+	 * the frequency. When ungate is requested in that situation
+	 * we just ignore the call.
+	 */
+	if (host->clk_old) {
+		BUG_ON(host->ios.clock);
+		/* This call will also set host->clk_gated to false */
+		__mmc_set_clock(host, host->clk_old);
+	}
+}
+
+void mmc_set_ungated(struct mmc_host *host)
+{
+	unsigned long flags;
+
+	/*
+	 * We've been given a new frequency while the clock is gated,
+	 * so make sure we regard this as ungating it.
+	 */
+	spin_lock_irqsave(&host->clk_lock, flags);
+	host->clk_gated = false;
+	spin_unlock_irqrestore(&host->clk_lock, flags);
+}
+
+#else
+void mmc_set_ungated(struct mmc_host *host)
+{
+}
+#endif
+
+/*
+ * Change the bus mode (open drain/push-pull) of a host.
+ */
+void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode)
+{
+	mmc_host_clk_hold(host);
+	host->ios.bus_mode = mode;
+	mmc_set_ios(host);
+	mmc_host_clk_release(host);
+}
+
+/*
+ * Change data bus width of a host.
+ */
+void mmc_set_bus_width(struct mmc_host *host, unsigned int width)
+{
+	mmc_host_clk_hold(host);
+	host->ios.bus_width = width;
+	mmc_set_ios(host);
+	mmc_host_clk_release(host);
+}
+
+/**
+ * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number
+ * @vdd:	voltage (mV)
+ * @low_bits:	prefer low bits in boundary cases
+ *
+ * This function returns the OCR bit number according to the provided @vdd
+ * value. If conversion is not possible a negative errno value returned.
+ *
+ * Depending on the @low_bits flag the function prefers low or high OCR bits
+ * on boundary voltages. For example,
+ * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33);
+ * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34);
+ *
+ * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21).
+ */
+static int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits)
+{
+	const int max_bit = ilog2(MMC_VDD_35_36);
+	int bit;
+
+	if (vdd < 1650 || vdd > 3600)
+		return -EINVAL;
+
+	if (vdd >= 1650 && vdd <= 1950)
+		return ilog2(MMC_VDD_165_195);
+
+	if (low_bits)
+		vdd -= 1;
+
+	/* Base 2000 mV, step 100 mV, bit's base 8. */
+	bit = (vdd - 2000) / 100 + 8;
+	if (bit > max_bit)
+		return max_bit;
+	return bit;
+}
+
+/**
+ * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask
+ * @vdd_min:	minimum voltage value (mV)
+ * @vdd_max:	maximum voltage value (mV)
+ *
+ * This function returns the OCR mask bits according to the provided @vdd_min
+ * and @vdd_max values. If conversion is not possible the function returns 0.
+ *
+ * Notes wrt boundary cases:
+ * This function sets the OCR bits for all boundary voltages, for example
+ * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 |
+ * MMC_VDD_34_35 mask.
+ */
+u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max)
+{
+	u32 mask = 0;
+
+	if (vdd_max < vdd_min)
+		return 0;
+
+	/* Prefer high bits for the boundary vdd_max values. */
+	vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false);
+	if (vdd_max < 0)
+		return 0;
+
+	/* Prefer low bits for the boundary vdd_min values. */
+	vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true);
+	if (vdd_min < 0)
+		return 0;
+
+	/* Fill the mask, from max bit to min bit. */
+	while (vdd_max >= vdd_min)
+		mask |= 1 << vdd_max--;
+
+	return mask;
+}
+EXPORT_SYMBOL(mmc_vddrange_to_ocrmask);
+
+#ifdef CONFIG_REGULATOR
+
+/**
+ * mmc_regulator_get_ocrmask - return mask of supported voltages
+ * @supply: regulator to use
+ *
+ * This returns either a negative errno, or a mask of voltages that
+ * can be provided to MMC/SD/SDIO devices using the specified voltage
+ * regulator.  This would normally be called before registering the
+ * MMC host adapter.
+ */
+int mmc_regulator_get_ocrmask(struct regulator *supply)
+{
+	int			result = 0;
+	int			count;
+	int			i;
+
+	count = regulator_count_voltages(supply);
+	if (count < 0)
+		return count;
+
+	for (i = 0; i < count; i++) {
+		int		vdd_uV;
+		int		vdd_mV;
+
+		vdd_uV = regulator_list_voltage(supply, i);
+		if (vdd_uV <= 0)
+			continue;
+
+		vdd_mV = vdd_uV / 1000;
+		result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV);
+	}
+
+	return result;
+}
+EXPORT_SYMBOL(mmc_regulator_get_ocrmask);
+
+/**
+ * mmc_regulator_set_ocr - set regulator to match host->ios voltage
+ * @mmc: the host to regulate
+ * @supply: regulator to use
+ * @vdd_bit: zero for power off, else a bit number (host->ios.vdd)
+ *
+ * Returns zero on success, else negative errno.
+ *
+ * MMC host drivers may use this to enable or disable a regulator using
+ * a particular supply voltage.  This would normally be called from the
+ * set_ios() method.
+ */
+int mmc_regulator_set_ocr(struct mmc_host *mmc,
+			struct regulator *supply,
+			unsigned short vdd_bit)
+{
+	int			result = 0;
+	int			min_uV, max_uV;
+
+	if (vdd_bit) {
+		int		tmp;
+		int		voltage;
+
+		/* REVISIT mmc_vddrange_to_ocrmask() may have set some
+		 * bits this regulator doesn't quite support ... don't
+		 * be too picky, most cards and regulators are OK with
+		 * a 0.1V range goof (it's a small error percentage).
+		 */
+		tmp = vdd_bit - ilog2(MMC_VDD_165_195);
+		if (tmp == 0) {
+			min_uV = 1650 * 1000;
+			max_uV = 1950 * 1000;
+		} else {
+			min_uV = 1900 * 1000 + tmp * 100 * 1000;
+			max_uV = min_uV + 100 * 1000;
+		}
+
+		/* avoid needless changes to this voltage; the regulator
+		 * might not allow this operation
+		 */
+		voltage = regulator_get_voltage(supply);
+
+		if (mmc->caps2 & MMC_CAP2_BROKEN_VOLTAGE)
+			min_uV = max_uV = voltage;
+
+		if (voltage < 0)
+			result = voltage;
+		else if (voltage < min_uV || voltage > max_uV)
+			result = regulator_set_voltage(supply, min_uV, max_uV);
+		else
+			result = 0;
+
+		if (result == 0 && !mmc->regulator_enabled) {
+			result = regulator_enable(supply);
+			if (!result)
+				mmc->regulator_enabled = true;
+		}
+	} else if (mmc->regulator_enabled) {
+		result = regulator_disable(supply);
+		if (result == 0)
+			mmc->regulator_enabled = false;
+	}
+
+	if (result)
+		dev_err(mmc_dev(mmc),
+			"could not set regulator OCR (%d)\n", result);
+	return result;
+}
+EXPORT_SYMBOL(mmc_regulator_set_ocr);
+
+#endif /* CONFIG_REGULATOR */
+
+/*
+ * Mask off any voltages we don't support and select
+ * the lowest voltage
+ */
+u32 mmc_select_voltage(struct mmc_host *host, u32 ocr)
+{
+	int bit;
+
+	ocr &= host->ocr_avail;
+
+	bit = ffs(ocr);
+	if (bit) {
+		bit -= 1;
+
+		ocr &= 3 << bit;
+
+		mmc_host_clk_hold(host);
+		host->ios.vdd = bit;
+		mmc_set_ios(host);
+		mmc_host_clk_release(host);
+	} else {
+		pr_warning("%s: host doesn't support card's voltages\n",
+				mmc_hostname(host));
+		ocr = 0;
+	}
+
+	return ocr;
+}
+
+int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, bool cmd11)
+{
+	struct mmc_command cmd = {0};
+	int err = 0;
+
+	BUG_ON(!host);
+
+	/*
+	 * Send CMD11 only if the request is to switch the card to
+	 * 1.8V signalling.
+	 */
+	if ((signal_voltage != MMC_SIGNAL_VOLTAGE_330) && cmd11) {
+		cmd.opcode = SD_SWITCH_VOLTAGE;
+		cmd.arg = 0;
+		cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+		err = mmc_wait_for_cmd(host, &cmd, 0);
+		if (err)
+			return err;
+
+		if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR))
+			return -EIO;
+	}
+
+	host->ios.signal_voltage = signal_voltage;
+
+	if (host->ops->start_signal_voltage_switch) {
+		mmc_host_clk_hold(host);
+		err = host->ops->start_signal_voltage_switch(host, &host->ios);
+		mmc_host_clk_release(host);
+	}
+
+	return err;
+}
+
+/*
+ * Select timing parameters for host.
+ */
+void mmc_set_timing(struct mmc_host *host, unsigned int timing)
+{
+	mmc_host_clk_hold(host);
+	host->ios.timing = timing;
+	mmc_set_ios(host);
+	mmc_host_clk_release(host);
+}
+
+/*
+ * Select appropriate driver type for host.
+ */
+void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type)
+{
+	mmc_host_clk_hold(host);
+	host->ios.drv_type = drv_type;
+	mmc_set_ios(host);
+	mmc_host_clk_release(host);
+}
+
+static void mmc_poweroff_notify(struct mmc_host *host)
+{
+	struct mmc_card *card;
+	unsigned int timeout;
+	unsigned int notify_type = EXT_CSD_NO_POWER_NOTIFICATION;
+	int err = 0;
+
+	card = host->card;
+	mmc_claim_host(host);
+
+	/*
+	 * Send power notify command only if card
+	 * is mmc and notify state is powered ON
+	 */
+	if (card && mmc_card_mmc(card) &&
+	    (card->poweroff_notify_state == MMC_POWERED_ON)) {
+
+		if (host->power_notify_type == MMC_HOST_PW_NOTIFY_SHORT) {
+			notify_type = EXT_CSD_POWER_OFF_SHORT;
+			timeout = card->ext_csd.generic_cmd6_time;
+			card->poweroff_notify_state = MMC_POWEROFF_SHORT;
+		} else {
+			notify_type = EXT_CSD_POWER_OFF_LONG;
+			timeout = card->ext_csd.power_off_longtime;
+			card->poweroff_notify_state = MMC_POWEROFF_LONG;
+		}
+
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 EXT_CSD_POWER_OFF_NOTIFICATION,
+				 notify_type, timeout);
+
+		if (err && err != -EBADMSG)
+			pr_err("Device failed to respond within %d poweroff "
+			       "time. Forcefully powering down the device\n",
+			       timeout);
+
+		/* Set the card state to no notification after the poweroff */
+		card->poweroff_notify_state = MMC_NO_POWER_NOTIFICATION;
+	}
+	mmc_release_host(host);
+}
+
+/*
+ * Apply power to the MMC stack.  This is a two-stage process.
+ * First, we enable power to the card without the clock running.
+ * We then wait a bit for the power to stabilise.  Finally,
+ * enable the bus drivers and clock to the card.
+ *
+ * We must _NOT_ enable the clock prior to power stablising.
+ *
+ * If a host does all the power sequencing itself, ignore the
+ * initial MMC_POWER_UP stage.
+ */
+static void mmc_power_up(struct mmc_host *host)
+{
+	int bit;
+
+	mmc_host_clk_hold(host);
+
+	/* If ocr is set, we use it */
+	if (host->ocr)
+		bit = ffs(host->ocr) - 1;
+	else
+		bit = fls(host->ocr_avail) - 1;
+
+	host->ios.vdd = bit;
+	if (mmc_host_is_spi(host))
+		host->ios.chip_select = MMC_CS_HIGH;
+	else
+		host->ios.chip_select = MMC_CS_DONTCARE;
+	host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
+	host->ios.power_mode = MMC_POWER_UP;
+	host->ios.bus_width = MMC_BUS_WIDTH_1;
+	host->ios.timing = MMC_TIMING_LEGACY;
+	mmc_set_ios(host);
+
+	/*
+	 * This delay should be sufficient to allow the power supply
+	 * to reach the minimum voltage.
+	 */
+	mmc_delay(10);
+
+	host->ios.clock = host->f_init;
+
+	host->ios.power_mode = MMC_POWER_ON;
+	mmc_set_ios(host);
+
+	/*
+	 * This delay must be at least 74 clock sizes, or 1 ms, or the
+	 * time required to reach a stable voltage.
+	 */
+	mmc_delay(10);
+
+	mmc_host_clk_release(host);
+}
+
+void mmc_power_off(struct mmc_host *host)
+{
+	int err = 0;
+	mmc_host_clk_hold(host);
+
+	host->ios.clock = 0;
+	host->ios.vdd = 0;
+
+	/*
+	 * For eMMC 4.5 device send AWAKE command before
+	 * POWER_OFF_NOTIFY command, because in sleep state
+	 * eMMC 4.5 devices respond to only RESET and AWAKE cmd
+	 */
+	if (host->card && mmc_card_is_sleep(host->card) &&
+	    host->bus_ops->resume) {
+		err = host->bus_ops->resume(host);
+
+		if (!err)
+			mmc_poweroff_notify(host);
+		else
+			pr_warning("%s: error %d during resume "
+				   "(continue with poweroff sequence)\n",
+				   mmc_hostname(host), err);
+	}
+
+	/*
+	 * Reset ocr mask to be the highest possible voltage supported for
+	 * this mmc host. This value will be used at next power up.
+	 */
+	host->ocr = 1 << (fls(host->ocr_avail) - 1);
+
+	if (!mmc_host_is_spi(host)) {
+		host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+		host->ios.chip_select = MMC_CS_DONTCARE;
+	}
+	host->ios.power_mode = MMC_POWER_OFF;
+	host->ios.bus_width = MMC_BUS_WIDTH_1;
+	host->ios.timing = MMC_TIMING_LEGACY;
+	mmc_set_ios(host);
+
+	/*
+	 * Some configurations, such as the 802.11 SDIO card in the OLPC
+	 * XO-1.5, require a short delay after poweroff before the card
+	 * can be successfully turned on again.
+	 */
+	mmc_delay(1);
+
+	mmc_host_clk_release(host);
+}
+
+/*
+ * Cleanup when the last reference to the bus operator is dropped.
+ */
+static void __mmc_release_bus(struct mmc_host *host)
+{
+	BUG_ON(!host);
+	BUG_ON(host->bus_refs);
+	BUG_ON(!host->bus_dead);
+
+	host->bus_ops = NULL;
+}
+
+/*
+ * Increase reference count of bus operator
+ */
+static inline void mmc_bus_get(struct mmc_host *host)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+	host->bus_refs++;
+	spin_unlock_irqrestore(&host->lock, flags);
+}
+
+/*
+ * Decrease reference count of bus operator and free it if
+ * it is the last reference.
+ */
+static inline void mmc_bus_put(struct mmc_host *host)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+	host->bus_refs--;
+	if ((host->bus_refs == 0) && host->bus_ops)
+		__mmc_release_bus(host);
+	spin_unlock_irqrestore(&host->lock, flags);
+}
+
+int mmc_resume_bus(struct mmc_host *host)
+{
+	unsigned long flags;
+
+	if (!mmc_bus_needs_resume(host))
+		return -EINVAL;
+
+	printk("%s: Starting deferred resume\n", mmc_hostname(host));
+	spin_lock_irqsave(&host->lock, flags);
+	host->bus_resume_flags &= ~MMC_BUSRESUME_NEEDS_RESUME;
+	host->rescan_disable = 0;
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	mmc_bus_get(host);
+	if (host->bus_ops && !host->bus_dead) {
+		mmc_power_up(host);
+		BUG_ON(!host->bus_ops->resume);
+		host->bus_ops->resume(host);
+	}
+
+	if (host->bus_ops->detect && !host->bus_dead)
+		host->bus_ops->detect(host);
+
+	mmc_bus_put(host);
+	printk("%s: Deferred resume completed\n", mmc_hostname(host));
+	return 0;
+}
+
+EXPORT_SYMBOL(mmc_resume_bus);
+
+/*
+ * Assign a mmc bus handler to a host. Only one bus handler may control a
+ * host at any given time.
+ */
+void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops)
+{
+	unsigned long flags;
+
+	BUG_ON(!host);
+	BUG_ON(!ops);
+
+	WARN_ON(!host->claimed);
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	BUG_ON(host->bus_ops);
+	BUG_ON(host->bus_refs);
+
+	host->bus_ops = ops;
+	host->bus_refs = 1;
+	host->bus_dead = 0;
+
+	spin_unlock_irqrestore(&host->lock, flags);
+}
+
+/*
+ * Remove the current bus handler from a host.
+ */
+void mmc_detach_bus(struct mmc_host *host)
+{
+	unsigned long flags;
+
+	BUG_ON(!host);
+
+	WARN_ON(!host->claimed);
+	WARN_ON(!host->bus_ops);
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	host->bus_dead = 1;
+
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	mmc_bus_put(host);
+}
+
+/**
+ *	mmc_detect_change - process change of state on a MMC socket
+ *	@host: host which changed state.
+ *	@delay: optional delay to wait before detection (jiffies)
+ *
+ *	MMC drivers should call this when they detect a card has been
+ *	inserted or removed. The MMC layer will confirm that any
+ *	present card is still functional, and initialize any newly
+ *	inserted.
+ */
+void mmc_detect_change(struct mmc_host *host, unsigned long delay)
+{
+#ifdef CONFIG_MMC_DEBUG
+	unsigned long flags;
+	spin_lock_irqsave(&host->lock, flags);
+	WARN_ON(host->removed);
+	spin_unlock_irqrestore(&host->lock, flags);
+#endif
+	host->detect_change = 1;
+
+	wake_lock(&host->detect_wake_lock);
+	mmc_schedule_delayed_work(&host->detect, delay);
+}
+
+EXPORT_SYMBOL(mmc_detect_change);
+
+void mmc_init_erase(struct mmc_card *card)
+{
+	unsigned int sz;
+
+	if (is_power_of_2(card->erase_size))
+		card->erase_shift = ffs(card->erase_size) - 1;
+	else
+		card->erase_shift = 0;
+
+	/*
+	 * It is possible to erase an arbitrarily large area of an SD or MMC
+	 * card.  That is not desirable because it can take a long time
+	 * (minutes) potentially delaying more important I/O, and also the
+	 * timeout calculations become increasingly hugely over-estimated.
+	 * Consequently, 'pref_erase' is defined as a guide to limit erases
+	 * to that size and alignment.
+	 *
+	 * For SD cards that define Allocation Unit size, limit erases to one
+	 * Allocation Unit at a time.  For MMC cards that define High Capacity
+	 * Erase Size, whether it is switched on or not, limit to that size.
+	 * Otherwise just have a stab at a good value.  For modern cards it
+	 * will end up being 4MiB.  Note that if the value is too small, it
+	 * can end up taking longer to erase.
+	 */
+	if (mmc_card_sd(card) && card->ssr.au) {
+		card->pref_erase = card->ssr.au;
+		card->erase_shift = ffs(card->ssr.au) - 1;
+	} else if (card->ext_csd.hc_erase_size) {
+		card->pref_erase = card->ext_csd.hc_erase_size;
+	} else {
+		sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11;
+		if (sz < 128)
+			card->pref_erase = 512 * 1024 / 512;
+		else if (sz < 512)
+			card->pref_erase = 1024 * 1024 / 512;
+		else if (sz < 1024)
+			card->pref_erase = 2 * 1024 * 1024 / 512;
+		else
+			card->pref_erase = 4 * 1024 * 1024 / 512;
+		if (card->pref_erase < card->erase_size)
+			card->pref_erase = card->erase_size;
+		else {
+			sz = card->pref_erase % card->erase_size;
+			if (sz)
+				card->pref_erase += card->erase_size - sz;
+		}
+	}
+}
+
+static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card,
+				          unsigned int arg, unsigned int qty)
+{
+	unsigned int erase_timeout;
+
+	if (arg == MMC_DISCARD_ARG ||
+	    (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) {
+		erase_timeout = card->ext_csd.trim_timeout;
+	} else if (card->ext_csd.erase_group_def & 1) {
+		/* High Capacity Erase Group Size uses HC timeouts */
+		if (arg == MMC_TRIM_ARG)
+			erase_timeout = card->ext_csd.trim_timeout;
+		else
+			erase_timeout = card->ext_csd.hc_erase_timeout;
+	} else {
+		/* CSD Erase Group Size uses write timeout */
+		unsigned int mult = (10 << card->csd.r2w_factor);
+		unsigned int timeout_clks = card->csd.tacc_clks * mult;
+		unsigned int timeout_us;
+
+		/* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */
+		if (card->csd.tacc_ns < 1000000)
+			timeout_us = (card->csd.tacc_ns * mult) / 1000;
+		else
+			timeout_us = (card->csd.tacc_ns / 1000) * mult;
+
+		/*
+		 * ios.clock is only a target.  The real clock rate might be
+		 * less but not that much less, so fudge it by multiplying by 2.
+		 */
+		timeout_clks <<= 1;
+		timeout_us += (timeout_clks * 1000) /
+			      (mmc_host_clk_rate(card->host) / 1000);
+
+		erase_timeout = timeout_us / 1000;
+
+		/*
+		 * Theoretically, the calculation could underflow so round up
+		 * to 1ms in that case.
+		 */
+		if (!erase_timeout)
+			erase_timeout = 1;
+	}
+
+	/* Multiplier for secure operations */
+	if (arg & MMC_SECURE_ARGS) {
+		if (arg == MMC_SECURE_ERASE_ARG)
+			erase_timeout *= card->ext_csd.sec_erase_mult;
+		else
+			erase_timeout *= card->ext_csd.sec_trim_mult;
+	}
+
+	erase_timeout *= qty;
+
+	/*
+	 * Ensure at least a 1 second timeout for SPI as per
+	 * 'mmc_set_data_timeout()'
+	 */
+	if (mmc_host_is_spi(card->host) && erase_timeout < 1000)
+		erase_timeout = 1000;
+
+	return erase_timeout;
+}
+
+static unsigned int mmc_sd_erase_timeout(struct mmc_card *card,
+					 unsigned int arg,
+					 unsigned int qty)
+{
+	unsigned int erase_timeout;
+
+	if (card->ssr.erase_timeout) {
+		/* Erase timeout specified in SD Status Register (SSR) */
+		erase_timeout = card->ssr.erase_timeout * qty +
+				card->ssr.erase_offset;
+	} else {
+		/*
+		 * Erase timeout not specified in SD Status Register (SSR) so
+		 * use 250ms per write block.
+		 */
+		erase_timeout = 250 * qty;
+	}
+
+	/* Must not be less than 1 second */
+	if (erase_timeout < 1000)
+		erase_timeout = 1000;
+
+	return erase_timeout;
+}
+
+static unsigned int mmc_erase_timeout(struct mmc_card *card,
+				      unsigned int arg,
+				      unsigned int qty)
+{
+	if (mmc_card_sd(card))
+		return mmc_sd_erase_timeout(card, arg, qty);
+	else
+		return mmc_mmc_erase_timeout(card, arg, qty);
+}
+
+static int mmc_do_erase(struct mmc_card *card, unsigned int from,
+			unsigned int to, unsigned int arg)
+{
+	struct mmc_command cmd = {0};
+	unsigned int qty = 0;
+	int err;
+
+	/*
+	 * qty is used to calculate the erase timeout which depends on how many
+	 * erase groups (or allocation units in SD terminology) are affected.
+	 * We count erasing part of an erase group as one erase group.
+	 * For SD, the allocation units are always a power of 2.  For MMC, the
+	 * erase group size is almost certainly also power of 2, but it does not
+	 * seem to insist on that in the JEDEC standard, so we fall back to
+	 * division in that case.  SD may not specify an allocation unit size,
+	 * in which case the timeout is based on the number of write blocks.
+	 *
+	 * Note that the timeout for secure trim 2 will only be correct if the
+	 * number of erase groups specified is the same as the total of all
+	 * preceding secure trim 1 commands.  Since the power may have been
+	 * lost since the secure trim 1 commands occurred, it is generally
+	 * impossible to calculate the secure trim 2 timeout correctly.
+	 */
+	if (card->erase_shift)
+		qty += ((to >> card->erase_shift) -
+			(from >> card->erase_shift)) + 1;
+	else if (mmc_card_sd(card))
+		qty += to - from + 1;
+	else
+		qty += ((to / card->erase_size) -
+			(from / card->erase_size)) + 1;
+
+	if (!mmc_card_blockaddr(card)) {
+		from <<= 9;
+		to <<= 9;
+	}
+
+	if (mmc_card_sd(card))
+		cmd.opcode = SD_ERASE_WR_BLK_START;
+	else
+		cmd.opcode = MMC_ERASE_GROUP_START;
+	cmd.arg = from;
+	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
+	err = mmc_wait_for_cmd(card->host, &cmd, 0);
+	if (err) {
+		pr_err("mmc_erase: group start error %d, "
+		       "status %#x\n", err, cmd.resp[0]);
+		err = -EIO;
+		goto out;
+	}
+
+	memset(&cmd, 0, sizeof(struct mmc_command));
+	if (mmc_card_sd(card))
+		cmd.opcode = SD_ERASE_WR_BLK_END;
+	else
+		cmd.opcode = MMC_ERASE_GROUP_END;
+	cmd.arg = to;
+	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
+	err = mmc_wait_for_cmd(card->host, &cmd, 0);
+	if (err) {
+		pr_err("mmc_erase: group end error %d, status %#x\n",
+		       err, cmd.resp[0]);
+		err = -EIO;
+		goto out;
+	}
+
+	memset(&cmd, 0, sizeof(struct mmc_command));
+	cmd.opcode = MMC_ERASE;
+	cmd.arg = arg;
+	cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
+	cmd.cmd_timeout_ms = mmc_erase_timeout(card, arg, qty);
+	err = mmc_wait_for_cmd(card->host, &cmd, 0);
+	if (err) {
+		pr_err("mmc_erase: erase error %d, status %#x\n",
+		       err, cmd.resp[0]);
+		err = -EIO;
+		goto out;
+	}
+
+	if (mmc_host_is_spi(card->host))
+		goto out;
+
+	do {
+		memset(&cmd, 0, sizeof(struct mmc_command));
+		cmd.opcode = MMC_SEND_STATUS;
+		cmd.arg = card->rca << 16;
+		cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+		/* Do not retry else we can't see errors */
+		err = mmc_wait_for_cmd(card->host, &cmd, 0);
+		if (err || (cmd.resp[0] & 0xFDF92000)) {
+			pr_err("error %d requesting status %#x\n",
+				err, cmd.resp[0]);
+			err = -EIO;
+			goto out;
+		}
+	} while (!(cmd.resp[0] & R1_READY_FOR_DATA) ||
+		 R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG);
+out:
+	return err;
+}
+
+/**
+ * mmc_erase - erase sectors.
+ * @card: card to erase
+ * @from: first sector to erase
+ * @nr: number of sectors to erase
+ * @arg: erase command argument (SD supports only %MMC_ERASE_ARG)
+ *
+ * Caller must claim host before calling this function.
+ */
+int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
+	      unsigned int arg)
+{
+	unsigned int rem, to = from + nr;
+
+	if (!(card->host->caps & MMC_CAP_ERASE) ||
+	    !(card->csd.cmdclass & CCC_ERASE))
+		return -EOPNOTSUPP;
+
+	if (!card->erase_size)
+		return -EOPNOTSUPP;
+
+	if (mmc_card_sd(card) && arg != MMC_ERASE_ARG)
+		return -EOPNOTSUPP;
+
+	if ((arg & MMC_SECURE_ARGS) &&
+	    !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN))
+		return -EOPNOTSUPP;
+
+	if ((arg & MMC_TRIM_ARGS) &&
+	    !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN))
+		return -EOPNOTSUPP;
+
+	if (arg == MMC_SECURE_ERASE_ARG) {
+		if (from % card->erase_size || nr % card->erase_size)
+			return -EINVAL;
+	}
+
+	if (arg == MMC_ERASE_ARG) {
+		rem = from % card->erase_size;
+		if (rem) {
+			rem = card->erase_size - rem;
+			from += rem;
+			if (nr > rem)
+				nr -= rem;
+			else
+				return 0;
+		}
+		rem = nr % card->erase_size;
+		if (rem)
+			nr -= rem;
+	}
+
+	if (nr == 0)
+		return 0;
+
+	to = from + nr;
+
+	if (to <= from)
+		return -EINVAL;
+
+	/* 'from' and 'to' are inclusive */
+	to -= 1;
+
+	return mmc_do_erase(card, from, to, arg);
+}
+EXPORT_SYMBOL(mmc_erase);
+
+int mmc_can_erase(struct mmc_card *card)
+{
+	if ((card->host->caps & MMC_CAP_ERASE) &&
+	    (card->csd.cmdclass & CCC_ERASE) && card->erase_size)
+		return 1;
+	return 0;
+}
+EXPORT_SYMBOL(mmc_can_erase);
+
+int mmc_can_trim(struct mmc_card *card)
+{
+	if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN)
+		return 1;
+	return 0;
+}
+EXPORT_SYMBOL(mmc_can_trim);
+
+int mmc_can_discard(struct mmc_card *card)
+{
+	/*
+	 * As there's no way to detect the discard support bit at v4.5
+	 * use the s/w feature support filed.
+	 */
+	if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE)
+		return 1;
+	return 0;
+}
+EXPORT_SYMBOL(mmc_can_discard);
+
+int mmc_can_sanitize(struct mmc_card *card)
+{
+	if (!mmc_can_trim(card) && !mmc_can_erase(card))
+		return 0;
+	if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE)
+		return 1;
+	return 0;
+}
+EXPORT_SYMBOL(mmc_can_sanitize);
+
+int mmc_can_secure_erase_trim(struct mmc_card *card)
+{
+	if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)
+		return 1;
+	return 0;
+}
+EXPORT_SYMBOL(mmc_can_secure_erase_trim);
+
+int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
+			    unsigned int nr)
+{
+	if (!card->erase_size)
+		return 0;
+	if (from % card->erase_size || nr % card->erase_size)
+		return 0;
+	return 1;
+}
+EXPORT_SYMBOL(mmc_erase_group_aligned);
+
+static unsigned int mmc_do_calc_max_discard(struct mmc_card *card,
+					    unsigned int arg)
+{
+	struct mmc_host *host = card->host;
+	unsigned int max_discard, x, y, qty = 0, max_qty, timeout;
+	unsigned int last_timeout = 0;
+
+	if (card->erase_shift)
+		max_qty = UINT_MAX >> card->erase_shift;
+	else if (mmc_card_sd(card))
+		max_qty = UINT_MAX;
+	else
+		max_qty = UINT_MAX / card->erase_size;
+
+	/* Find the largest qty with an OK timeout */
+	do {
+		y = 0;
+		for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) {
+			timeout = mmc_erase_timeout(card, arg, qty + x);
+			if (timeout > host->max_discard_to)
+				break;
+			if (timeout < last_timeout)
+				break;
+			last_timeout = timeout;
+			y = x;
+		}
+		qty += y;
+	} while (y);
+
+	if (!qty)
+		return 0;
+
+	if (qty == 1)
+		return 1;
+
+	/* Convert qty to sectors */
+	if (card->erase_shift)
+		max_discard = --qty << card->erase_shift;
+	else if (mmc_card_sd(card))
+		max_discard = qty;
+	else
+		max_discard = --qty * card->erase_size;
+
+	return max_discard;
+}
+
+unsigned int mmc_calc_max_discard(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+	unsigned int max_discard, max_trim;
+
+	if (!host->max_discard_to)
+		return UINT_MAX;
+
+	/*
+	 * Without erase_group_def set, MMC erase timeout depends on clock
+	 * frequence which can change.  In that case, the best choice is
+	 * just the preferred erase size.
+	 */
+	if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1))
+		return card->pref_erase;
+
+	max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG);
+	if (mmc_can_trim(card)) {
+		max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG);
+		if (max_trim < max_discard)
+			max_discard = max_trim;
+	} else if (max_discard < card->erase_size) {
+		max_discard = 0;
+	}
+	pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n",
+		 mmc_hostname(host), max_discard, host->max_discard_to);
+	return max_discard;
+}
+EXPORT_SYMBOL(mmc_calc_max_discard);
+
+int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen)
+{
+	struct mmc_command cmd = {0};
+
+	if (mmc_card_blockaddr(card) || mmc_card_ddr_mode(card))
+		return 0;
+
+	cmd.opcode = MMC_SET_BLOCKLEN;
+	cmd.arg = blocklen;
+	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
+	return mmc_wait_for_cmd(card->host, &cmd, 5);
+}
+EXPORT_SYMBOL(mmc_set_blocklen);
+
+static void mmc_hw_reset_for_init(struct mmc_host *host)
+{
+	if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
+		return;
+	mmc_host_clk_hold(host);
+	host->ops->hw_reset(host);
+	mmc_host_clk_release(host);
+}
+
+int mmc_can_reset(struct mmc_card *card)
+{
+	u8 rst_n_function;
+
+	if (!mmc_card_mmc(card))
+		return 0;
+	rst_n_function = card->ext_csd.rst_n_function;
+	if ((rst_n_function & EXT_CSD_RST_N_EN_MASK) != EXT_CSD_RST_N_ENABLED)
+		return 0;
+	return 1;
+}
+EXPORT_SYMBOL(mmc_can_reset);
+
+static int mmc_do_hw_reset(struct mmc_host *host, int check)
+{
+	struct mmc_card *card = host->card;
+
+	if (!host->bus_ops->power_restore)
+		return -EOPNOTSUPP;
+
+	if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
+		return -EOPNOTSUPP;
+
+	if (!card)
+		return -EINVAL;
+
+	if (!mmc_can_reset(card))
+		return -EOPNOTSUPP;
+
+	mmc_host_clk_hold(host);
+	mmc_set_clock(host, host->f_init);
+
+	host->ops->hw_reset(host);
+
+	/* If the reset has happened, then a status command will fail */
+	if (check) {
+		struct mmc_command cmd = {0};
+		int err;
+
+		cmd.opcode = MMC_SEND_STATUS;
+		if (!mmc_host_is_spi(card->host))
+			cmd.arg = card->rca << 16;
+		cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
+		err = mmc_wait_for_cmd(card->host, &cmd, 0);
+		if (!err) {
+			mmc_host_clk_release(host);
+			return -ENOSYS;
+		}
+	}
+
+	host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_DDR);
+	if (mmc_host_is_spi(host)) {
+		host->ios.chip_select = MMC_CS_HIGH;
+		host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
+	} else {
+		host->ios.chip_select = MMC_CS_DONTCARE;
+		host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+	}
+	host->ios.bus_width = MMC_BUS_WIDTH_1;
+	host->ios.timing = MMC_TIMING_LEGACY;
+	mmc_set_ios(host);
+
+	mmc_host_clk_release(host);
+
+	return host->bus_ops->power_restore(host);
+}
+
+int mmc_hw_reset(struct mmc_host *host)
+{
+	return mmc_do_hw_reset(host, 0);
+}
+EXPORT_SYMBOL(mmc_hw_reset);
+
+int mmc_hw_reset_check(struct mmc_host *host)
+{
+	return mmc_do_hw_reset(host, 1);
+}
+EXPORT_SYMBOL(mmc_hw_reset_check);
+
+static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
+{
+	host->f_init = freq;
+
+#ifdef CONFIG_MMC_DEBUG
+	pr_info("%s: %s: trying to init card at %u Hz\n",
+		mmc_hostname(host), __func__, host->f_init);
+#endif
+	mmc_power_up(host);
+
+	/*
+	 * Some eMMCs (with VCCQ always on) may not be reset after power up, so
+	 * do a hardware reset if possible.
+	 */
+	mmc_hw_reset_for_init(host);
+
+	/* Initialization should be done at 3.3 V I/O voltage. */
+	mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
+
+	/*
+	 * sdio_reset sends CMD52 to reset card.  Since we do not know
+	 * if the card is being re-initialized, just send it.  CMD52
+	 * should be ignored by SD/eMMC cards.
+	 */
+	sdio_reset(host);
+	mmc_go_idle(host);
+
+	mmc_send_if_cond(host, host->ocr_avail);
+
+	/* Order's important: probe SDIO, then SD, then MMC */
+	if (!mmc_attach_sdio(host))
+		return 0;
+	if (!mmc_attach_sd(host))
+		return 0;
+	if (!mmc_attach_mmc(host))
+		return 0;
+
+	mmc_power_off(host);
+	return -EIO;
+}
+
+int _mmc_detect_card_removed(struct mmc_host *host)
+{
+	int ret;
+
+	if ((host->caps & MMC_CAP_NONREMOVABLE) || !host->bus_ops->alive)
+		return 0;
+
+	if (!host->card || mmc_card_removed(host->card))
+		return 1;
+
+	ret = host->bus_ops->alive(host);
+	if (ret) {
+		mmc_card_set_removed(host->card);
+		pr_debug("%s: card remove detected\n", mmc_hostname(host));
+	}
+
+	return ret;
+}
+
+int mmc_detect_card_removed(struct mmc_host *host)
+{
+	struct mmc_card *card = host->card;
+	int ret;
+
+	WARN_ON(!host->claimed);
+
+	if (!card)
+		return 1;
+
+	ret = mmc_card_removed(card);
+	/*
+	 * The card will be considered unchanged unless we have been asked to
+	 * detect a change or host requires polling to provide card detection.
+	 */
+	if (!host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL) &&
+	    !(host->caps2 & MMC_CAP2_DETECT_ON_ERR))
+		return ret;
+
+	host->detect_change = 0;
+	if (!ret) {
+		ret = _mmc_detect_card_removed(host);
+		if (ret && (host->caps2 & MMC_CAP2_DETECT_ON_ERR)) {
+			/*
+			 * Schedule a detect work as soon as possible to let a
+			 * rescan handle the card removal.
+			 */
+			cancel_delayed_work(&host->detect);
+			mmc_detect_change(host, 0);
+		}
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL(mmc_detect_card_removed);
+
+void mmc_rescan(struct work_struct *work)
+{
+	static const unsigned freqs[] = { 400000, 300000, 200000, 100000 };
+	struct mmc_host *host =
+		container_of(work, struct mmc_host, detect.work);
+	int i;
+	bool extend_wakelock = false;
+
+	if (host->rescan_disable)
+		return;
+
+	mmc_bus_get(host);
+
+	/*
+	 * if there is a _removable_ card registered, check whether it is
+	 * still present
+	 */
+	if (host->bus_ops && host->bus_ops->detect && !host->bus_dead
+	    && !(host->caps & MMC_CAP_NONREMOVABLE))
+		host->bus_ops->detect(host);
+
+	host->detect_change = 0;
+
+	/* If the card was removed the bus will be marked
+	 * as dead - extend the wakelock so userspace
+	 * can respond */
+	if (host->bus_dead)
+		extend_wakelock = 1;
+
+	/*
+	 * Let mmc_bus_put() free the bus/bus_ops if we've found that
+	 * the card is no longer present.
+	 */
+	mmc_bus_put(host);
+	mmc_bus_get(host);
+
+	/* if there still is a card present, stop here */
+	if (host->bus_ops != NULL) {
+		mmc_bus_put(host);
+		goto out;
+	}
+
+	/*
+	 * Only we can add a new handler, so it's safe to
+	 * release the lock here.
+	 */
+	mmc_bus_put(host);
+
+	if (host->ops->get_cd && host->ops->get_cd(host) == 0)
+		goto out;
+
+	mmc_claim_host(host);
+	for (i = 0; i < ARRAY_SIZE(freqs); i++) {
+		if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) {
+			extend_wakelock = true;
+			break;
+		}
+		if (freqs[i] <= host->f_min)
+			break;
+	}
+	mmc_release_host(host);
+
+ out:
+	if (extend_wakelock)
+		wake_lock_timeout(&host->detect_wake_lock, HZ / 2);
+	else
+		wake_unlock(&host->detect_wake_lock);
+	if (host->caps & MMC_CAP_NEEDS_POLL) {
+		wake_lock(&host->detect_wake_lock);
+		mmc_schedule_delayed_work(&host->detect, HZ);
+	}
+}
+
+void mmc_start_host(struct mmc_host *host)
+{
+	mmc_power_off(host);
+	mmc_detect_change(host, 0);
+}
+
+void mmc_stop_host(struct mmc_host *host)
+{
+#ifdef CONFIG_MMC_DEBUG
+	unsigned long flags;
+	spin_lock_irqsave(&host->lock, flags);
+	host->removed = 1;
+	spin_unlock_irqrestore(&host->lock, flags);
+#endif
+
+	if (cancel_delayed_work_sync(&host->detect))
+		wake_unlock(&host->detect_wake_lock);
+	mmc_flush_scheduled_work();
+
+	/* clear pm flags now and let card drivers set them as needed */
+	host->pm_flags = 0;
+
+	mmc_bus_get(host);
+	if (host->bus_ops && !host->bus_dead) {
+		/* Calling bus_ops->remove() with a claimed host can deadlock */
+		if (host->bus_ops->remove)
+			host->bus_ops->remove(host);
+
+		mmc_claim_host(host);
+		mmc_detach_bus(host);
+		mmc_power_off(host);
+		mmc_release_host(host);
+		mmc_bus_put(host);
+		return;
+	}
+	mmc_bus_put(host);
+
+	BUG_ON(host->card);
+
+	mmc_power_off(host);
+}
+
+int mmc_power_save_host(struct mmc_host *host)
+{
+	int ret = 0;
+
+#ifdef CONFIG_MMC_DEBUG
+	pr_info("%s: %s: powering down\n", mmc_hostname(host), __func__);
+#endif
+
+	mmc_bus_get(host);
+
+	if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) {
+		mmc_bus_put(host);
+		return -EINVAL;
+	}
+
+	if (host->bus_ops->power_save)
+		ret = host->bus_ops->power_save(host);
+
+	mmc_bus_put(host);
+
+	mmc_power_off(host);
+
+	return ret;
+}
+EXPORT_SYMBOL(mmc_power_save_host);
+
+int mmc_power_restore_host(struct mmc_host *host)
+{
+	int ret;
+
+#ifdef CONFIG_MMC_DEBUG
+	pr_info("%s: %s: powering up\n", mmc_hostname(host), __func__);
+#endif
+
+	mmc_bus_get(host);
+
+	if (!host->bus_ops || host->bus_dead || !host->bus_ops->power_restore) {
+		mmc_bus_put(host);
+		return -EINVAL;
+	}
+
+	mmc_power_up(host);
+	ret = host->bus_ops->power_restore(host);
+
+	mmc_bus_put(host);
+
+	return ret;
+}
+EXPORT_SYMBOL(mmc_power_restore_host);
+
+int mmc_card_awake(struct mmc_host *host)
+{
+	int err = -ENOSYS;
+
+	if (host->caps2 & MMC_CAP2_NO_SLEEP_CMD)
+		return 0;
+
+	mmc_bus_get(host);
+
+	if (host->bus_ops && !host->bus_dead && host->bus_ops->awake)
+		err = host->bus_ops->awake(host);
+
+	mmc_bus_put(host);
+
+	return err;
+}
+EXPORT_SYMBOL(mmc_card_awake);
+
+int mmc_card_sleep(struct mmc_host *host)
+{
+	int err = -ENOSYS;
+
+	if (host->caps2 & MMC_CAP2_NO_SLEEP_CMD)
+		return 0;
+
+	mmc_bus_get(host);
+
+	if (host->bus_ops && !host->bus_dead && host->bus_ops->sleep)
+		err = host->bus_ops->sleep(host);
+
+	mmc_bus_put(host);
+
+	return err;
+}
+EXPORT_SYMBOL(mmc_card_sleep);
+
+int mmc_card_can_sleep(struct mmc_host *host)
+{
+	struct mmc_card *card = host->card;
+
+	if (card && mmc_card_mmc(card) && card->ext_csd.rev >= 3)
+		return 1;
+	return 0;
+}
+EXPORT_SYMBOL(mmc_card_can_sleep);
+
+/*
+ * Flush the cache to the non-volatile storage.
+ */
+int mmc_flush_cache(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+	int err = 0;
+
+	if (!(host->caps2 & MMC_CAP2_CACHE_CTRL))
+		return err;
+
+	if (mmc_card_mmc(card) &&
+			(card->ext_csd.cache_size > 0) &&
+			(card->ext_csd.cache_ctrl & 1)) {
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				EXT_CSD_FLUSH_CACHE, 1, 0);
+		if (err)
+			pr_err("%s: cache flush error %d\n",
+					mmc_hostname(card->host), err);
+	}
+
+	return err;
+}
+EXPORT_SYMBOL(mmc_flush_cache);
+
+/*
+ * Turn the cache ON/OFF.
+ * Turning the cache OFF shall trigger flushing of the data
+ * to the non-volatile storage.
+ */
+int mmc_cache_ctrl(struct mmc_host *host, u8 enable)
+{
+	struct mmc_card *card = host->card;
+	unsigned int timeout;
+	int err = 0;
+
+	if (!(host->caps2 & MMC_CAP2_CACHE_CTRL) ||
+			mmc_card_is_removable(host))
+		return err;
+
+	mmc_claim_host(host);
+	if (card && mmc_card_mmc(card) &&
+			(card->ext_csd.cache_size > 0)) {
+		enable = !!enable;
+
+		if (card->ext_csd.cache_ctrl ^ enable) {
+			timeout = enable ? card->ext_csd.generic_cmd6_time : 0;
+			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+					EXT_CSD_CACHE_CTRL, enable, timeout);
+			if (err)
+				pr_err("%s: cache %s error %d\n",
+						mmc_hostname(card->host),
+						enable ? "on" : "off",
+						err);
+			else
+				card->ext_csd.cache_ctrl = enable;
+		}
+	}
+	mmc_release_host(host);
+
+	return err;
+}
+EXPORT_SYMBOL(mmc_cache_ctrl);
+
+#ifdef CONFIG_PM
+
+/**
+ *	mmc_suspend_host - suspend a host
+ *	@host: mmc host
+ */
+int mmc_suspend_host(struct mmc_host *host)
+{
+	int err = 0;
+
+	if (mmc_bus_needs_resume(host))
+		return 0;
+
+	if (cancel_delayed_work(&host->detect))
+		wake_unlock(&host->detect_wake_lock);
+	mmc_flush_scheduled_work();
+
+	err = mmc_cache_ctrl(host, 0);
+	if (err)
+		goto out;
+
+	mmc_bus_get(host);
+	if (host->bus_ops && !host->bus_dead) {
+
+		if (host->bus_ops->suspend)
+			err = host->bus_ops->suspend(host);
+
+		if (err == -ENOSYS || !host->bus_ops->resume) {
+			/*
+			 * We simply "remove" the card in this case.
+			 * It will be redetected on resume.  (Calling
+			 * bus_ops->remove() with a claimed host can
+			 * deadlock.)
+			 */
+			if (host->bus_ops->remove)
+				host->bus_ops->remove(host);
+			mmc_claim_host(host);
+			mmc_detach_bus(host);
+			mmc_power_off(host);
+			mmc_release_host(host);
+			host->pm_flags = 0;
+			err = 0;
+		}
+	}
+	mmc_bus_put(host);
+
+	if (!err && !mmc_card_keep_power(host))
+		mmc_power_off(host);
+
+out:
+	return err;
+}
+
+EXPORT_SYMBOL(mmc_suspend_host);
+
+/**
+ *	mmc_resume_host - resume a previously suspended host
+ *	@host: mmc host
+ */
+int mmc_resume_host(struct mmc_host *host)
+{
+	int err = 0;
+
+	mmc_bus_get(host);
+	if (mmc_bus_manual_resume(host)) {
+		host->bus_resume_flags |= MMC_BUSRESUME_NEEDS_RESUME;
+		mmc_bus_put(host);
+		return 0;
+	}
+
+	if (host->bus_ops && !host->bus_dead) {
+		if (!mmc_card_keep_power(host)) {
+			mmc_power_up(host);
+			mmc_select_voltage(host, host->ocr);
+			/*
+			 * Tell runtime PM core we just powered up the card,
+			 * since it still believes the card is powered off.
+			 * Note that currently runtime PM is only enabled
+			 * for SDIO cards that are MMC_CAP_POWER_OFF_CARD
+			 */
+			if (mmc_card_sdio(host->card) &&
+			    (host->caps & MMC_CAP_POWER_OFF_CARD)) {
+				pm_runtime_disable(&host->card->dev);
+				pm_runtime_set_active(&host->card->dev);
+				pm_runtime_enable(&host->card->dev);
+			}
+		}
+		BUG_ON(!host->bus_ops->resume);
+		err = host->bus_ops->resume(host);
+		if (err) {
+			pr_warning("%s: error %d during resume "
+					    "(card was removed?)\n",
+					    mmc_hostname(host), err);
+			err = 0;
+		}
+	}
+	host->pm_flags &= ~MMC_PM_KEEP_POWER;
+	mmc_bus_put(host);
+
+	return err;
+}
+EXPORT_SYMBOL(mmc_resume_host);
+
+/* Do the card removal on suspend if card is assumed removeable
+ * Do that in pm notifier while userspace isn't yet frozen, so we will be able
+   to sync the card.
+*/
+int mmc_pm_notify(struct notifier_block *notify_block,
+					unsigned long mode, void *unused)
+{
+	struct mmc_host *host = container_of(
+		notify_block, struct mmc_host, pm_notify);
+	unsigned long flags;
+
+
+	switch (mode) {
+	case PM_HIBERNATION_PREPARE:
+	case PM_SUSPEND_PREPARE:
+
+		spin_lock_irqsave(&host->lock, flags);
+		if (mmc_bus_needs_resume(host)) {
+			spin_unlock_irqrestore(&host->lock, flags);
+			break;
+		}
+		host->rescan_disable = 1;
+		host->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT;
+		spin_unlock_irqrestore(&host->lock, flags);
+		if (cancel_delayed_work_sync(&host->detect))
+			wake_unlock(&host->detect_wake_lock);
+
+		if (!host->bus_ops || host->bus_ops->suspend)
+			break;
+
+		/* Calling bus_ops->remove() with a claimed host can deadlock */
+		if (host->bus_ops->remove)
+			host->bus_ops->remove(host);
+
+		mmc_claim_host(host);
+		mmc_detach_bus(host);
+		mmc_power_off(host);
+		mmc_release_host(host);
+		host->pm_flags = 0;
+		break;
+
+	case PM_POST_SUSPEND:
+	case PM_POST_HIBERNATION:
+	case PM_POST_RESTORE:
+
+		spin_lock_irqsave(&host->lock, flags);
+		if (mmc_bus_manual_resume(host)) {
+			spin_unlock_irqrestore(&host->lock, flags);
+			break;
+		}
+		host->rescan_disable = 0;
+		host->power_notify_type = MMC_HOST_PW_NOTIFY_LONG;
+		spin_unlock_irqrestore(&host->lock, flags);
+		mmc_detect_change(host, 0);
+
+	}
+
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+void mmc_set_embedded_sdio_data(struct mmc_host *host,
+				struct sdio_cis *cis,
+				struct sdio_cccr *cccr,
+				struct sdio_embedded_func *funcs,
+				int num_funcs)
+{
+	host->embedded_sdio_data.cis = cis;
+	host->embedded_sdio_data.cccr = cccr;
+	host->embedded_sdio_data.funcs = funcs;
+	host->embedded_sdio_data.num_funcs = num_funcs;
+}
+
+EXPORT_SYMBOL(mmc_set_embedded_sdio_data);
+#endif
+
+static int __init mmc_init(void)
+{
+	int ret;
+
+	workqueue = alloc_ordered_workqueue("kmmcd", 0);
+	if (!workqueue)
+		return -ENOMEM;
+
+	ret = mmc_register_bus();
+	if (ret)
+		goto destroy_workqueue;
+
+	ret = mmc_register_host_class();
+	if (ret)
+		goto unregister_bus;
+
+	ret = sdio_register_bus();
+	if (ret)
+		goto unregister_host_class;
+
+	return 0;
+
+unregister_host_class:
+	mmc_unregister_host_class();
+unregister_bus:
+	mmc_unregister_bus();
+destroy_workqueue:
+	destroy_workqueue(workqueue);
+
+	return ret;
+}
+
+static void __exit mmc_exit(void)
+{
+	sdio_unregister_bus();
+	mmc_unregister_host_class();
+	mmc_unregister_bus();
+	destroy_workqueue(workqueue);
+}
+
+subsys_initcall(mmc_init);
+module_exit(mmc_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/ANDROID_3.4.5/drivers/mmc/core/core.h b/ANDROID_3.4.5/drivers/mmc/core/core.h
new file mode 100644
index 00000000..3bdafbca
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/core.h
@@ -0,0 +1,80 @@
+/*
+ *  linux/drivers/mmc/core/core.h
+ *
+ *  Copyright (C) 2003 Russell King, All Rights Reserved.
+ *  Copyright 2007 Pierre Ossman
+ *
+ * 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.
+ */
+#ifndef _MMC_CORE_CORE_H
+#define _MMC_CORE_CORE_H
+
+#include <linux/delay.h>
+
+#define MMC_CMD_RETRIES        3
+
+struct mmc_bus_ops {
+	int (*awake)(struct mmc_host *);
+	int (*sleep)(struct mmc_host *);
+	void (*remove)(struct mmc_host *);
+	void (*detect)(struct mmc_host *);
+	int (*suspend)(struct mmc_host *);
+	int (*resume)(struct mmc_host *);
+	int (*power_save)(struct mmc_host *);
+	int (*power_restore)(struct mmc_host *);
+	int (*alive)(struct mmc_host *);
+};
+
+void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops);
+void mmc_detach_bus(struct mmc_host *host);
+
+void mmc_init_erase(struct mmc_card *card);
+
+void mmc_set_chip_select(struct mmc_host *host, int mode);
+void mmc_set_clock(struct mmc_host *host, unsigned int hz);
+void mmc_gate_clock(struct mmc_host *host);
+void mmc_ungate_clock(struct mmc_host *host);
+void mmc_set_ungated(struct mmc_host *host);
+void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode);
+void mmc_set_bus_width(struct mmc_host *host, unsigned int width);
+u32 mmc_select_voltage(struct mmc_host *host, u32 ocr);
+int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage,
+			   bool cmd11);
+void mmc_set_timing(struct mmc_host *host, unsigned int timing);
+void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type);
+void mmc_power_off(struct mmc_host *host);
+
+static inline void mmc_delay(unsigned int ms)
+{
+	if (ms < 1000 / HZ) {
+		cond_resched();
+		mdelay(ms);
+	} else {
+		msleep(ms);
+	}
+}
+
+void mmc_rescan(struct work_struct *work);
+void mmc_start_host(struct mmc_host *host);
+void mmc_stop_host(struct mmc_host *host);
+
+int _mmc_detect_card_removed(struct mmc_host *host);
+
+int mmc_attach_mmc(struct mmc_host *host);
+int mmc_attach_sd(struct mmc_host *host);
+int mmc_attach_sdio(struct mmc_host *host);
+
+/* Module parameters */
+extern bool use_spi_crc;
+
+/* Debugfs information for hosts and cards */
+void mmc_add_host_debugfs(struct mmc_host *host);
+void mmc_remove_host_debugfs(struct mmc_host *host);
+
+void mmc_add_card_debugfs(struct mmc_card *card);
+void mmc_remove_card_debugfs(struct mmc_card *card);
+
+#endif
+
diff --git a/ANDROID_3.4.5/drivers/mmc/core/debugfs.c b/ANDROID_3.4.5/drivers/mmc/core/debugfs.c
new file mode 100644
index 00000000..9ab5b17d
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/debugfs.c
@@ -0,0 +1,364 @@
+/*
+ * Debugfs support for hosts and cards
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ *
+ * 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/moduleparam.h>
+#include <linux/export.h>
+#include <linux/debugfs.h>
+#include <linux/fs.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/fault-inject.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+
+#include "core.h"
+#include "mmc_ops.h"
+
+#ifdef CONFIG_FAIL_MMC_REQUEST
+
+static DECLARE_FAULT_ATTR(fail_default_attr);
+static char *fail_request;
+module_param(fail_request, charp, 0);
+
+#endif /* CONFIG_FAIL_MMC_REQUEST */
+
+/* The debugfs functions are optimized away when CONFIG_DEBUG_FS isn't set. */
+static int mmc_ios_show(struct seq_file *s, void *data)
+{
+	static const char *vdd_str[] = {
+		[8]	= "2.0",
+		[9]	= "2.1",
+		[10]	= "2.2",
+		[11]	= "2.3",
+		[12]	= "2.4",
+		[13]	= "2.5",
+		[14]	= "2.6",
+		[15]	= "2.7",
+		[16]	= "2.8",
+		[17]	= "2.9",
+		[18]	= "3.0",
+		[19]	= "3.1",
+		[20]	= "3.2",
+		[21]	= "3.3",
+		[22]	= "3.4",
+		[23]	= "3.5",
+		[24]	= "3.6",
+	};
+	struct mmc_host	*host = s->private;
+	struct mmc_ios	*ios = &host->ios;
+	const char *str;
+
+	seq_printf(s, "clock:\t\t%u Hz\n", ios->clock);
+	if (host->actual_clock)
+		seq_printf(s, "actual clock:\t%u Hz\n", host->actual_clock);
+	seq_printf(s, "vdd:\t\t%u ", ios->vdd);
+	if ((1 << ios->vdd) & MMC_VDD_165_195)
+		seq_printf(s, "(1.65 - 1.95 V)\n");
+	else if (ios->vdd < (ARRAY_SIZE(vdd_str) - 1)
+			&& vdd_str[ios->vdd] && vdd_str[ios->vdd + 1])
+		seq_printf(s, "(%s ~ %s V)\n", vdd_str[ios->vdd],
+				vdd_str[ios->vdd + 1]);
+	else
+		seq_printf(s, "(invalid)\n");
+
+	switch (ios->bus_mode) {
+	case MMC_BUSMODE_OPENDRAIN:
+		str = "open drain";
+		break;
+	case MMC_BUSMODE_PUSHPULL:
+		str = "push-pull";
+		break;
+	default:
+		str = "invalid";
+		break;
+	}
+	seq_printf(s, "bus mode:\t%u (%s)\n", ios->bus_mode, str);
+
+	switch (ios->chip_select) {
+	case MMC_CS_DONTCARE:
+		str = "don't care";
+		break;
+	case MMC_CS_HIGH:
+		str = "active high";
+		break;
+	case MMC_CS_LOW:
+		str = "active low";
+		break;
+	default:
+		str = "invalid";
+		break;
+	}
+	seq_printf(s, "chip select:\t%u (%s)\n", ios->chip_select, str);
+
+	switch (ios->power_mode) {
+	case MMC_POWER_OFF:
+		str = "off";
+		break;
+	case MMC_POWER_UP:
+		str = "up";
+		break;
+	case MMC_POWER_ON:
+		str = "on";
+		break;
+	default:
+		str = "invalid";
+		break;
+	}
+	seq_printf(s, "power mode:\t%u (%s)\n", ios->power_mode, str);
+	seq_printf(s, "bus width:\t%u (%u bits)\n",
+			ios->bus_width, 1 << ios->bus_width);
+
+	switch (ios->timing) {
+	case MMC_TIMING_LEGACY:
+		str = "legacy";
+		break;
+	case MMC_TIMING_MMC_HS:
+		str = "mmc high-speed";
+		break;
+	case MMC_TIMING_SD_HS:
+		str = "sd high-speed";
+		break;
+	case MMC_TIMING_UHS_SDR50:
+		str = "sd uhs SDR50";
+		break;
+	case MMC_TIMING_UHS_SDR104:
+		str = "sd uhs SDR104";
+		break;
+	case MMC_TIMING_UHS_DDR50:
+		str = "sd uhs DDR50";
+		break;
+	case MMC_TIMING_MMC_HS200:
+		str = "mmc high-speed SDR200";
+		break;
+	default:
+		str = "invalid";
+		break;
+	}
+	seq_printf(s, "timing spec:\t%u (%s)\n", ios->timing, str);
+
+	return 0;
+}
+
+static int mmc_ios_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, mmc_ios_show, inode->i_private);
+}
+
+static const struct file_operations mmc_ios_fops = {
+	.open		= mmc_ios_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static int mmc_clock_opt_get(void *data, u64 *val)
+{
+	struct mmc_host *host = data;
+
+	*val = host->ios.clock;
+
+	return 0;
+}
+
+static int mmc_clock_opt_set(void *data, u64 val)
+{
+	struct mmc_host *host = data;
+
+	/* We need this check due to input value is u64 */
+	if (val > host->f_max)
+		return -EINVAL;
+
+	mmc_claim_host(host);
+	mmc_set_clock(host, (unsigned int) val);
+	mmc_release_host(host);
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(mmc_clock_fops, mmc_clock_opt_get, mmc_clock_opt_set,
+	"%llu\n");
+
+void mmc_add_host_debugfs(struct mmc_host *host)
+{
+	struct dentry *root;
+
+	root = debugfs_create_dir(mmc_hostname(host), NULL);
+	if (IS_ERR(root))
+		/* Don't complain -- debugfs just isn't enabled */
+		return;
+	if (!root)
+		/* Complain -- debugfs is enabled, but it failed to
+		 * create the directory. */
+		goto err_root;
+
+	host->debugfs_root = root;
+
+	if (!debugfs_create_file("ios", S_IRUSR, root, host, &mmc_ios_fops))
+		goto err_node;
+
+	if (!debugfs_create_file("clock", S_IRUSR | S_IWUSR, root, host,
+			&mmc_clock_fops))
+		goto err_node;
+
+#ifdef CONFIG_MMC_CLKGATE
+	if (!debugfs_create_u32("clk_delay", (S_IRUSR | S_IWUSR),
+				root, &host->clk_delay))
+		goto err_node;
+#endif
+#ifdef CONFIG_FAIL_MMC_REQUEST
+	if (fail_request)
+		setup_fault_attr(&fail_default_attr, fail_request);
+	host->fail_mmc_request = fail_default_attr;
+	if (IS_ERR(fault_create_debugfs_attr("fail_mmc_request",
+					     root,
+					     &host->fail_mmc_request)))
+		goto err_node;
+#endif
+	return;
+
+err_node:
+	debugfs_remove_recursive(root);
+	host->debugfs_root = NULL;
+err_root:
+	dev_err(&host->class_dev, "failed to initialize debugfs\n");
+}
+
+void mmc_remove_host_debugfs(struct mmc_host *host)
+{
+	debugfs_remove_recursive(host->debugfs_root);
+}
+
+static int mmc_dbg_card_status_get(void *data, u64 *val)
+{
+	struct mmc_card	*card = data;
+	u32		status;
+	int		ret;
+
+	mmc_claim_host(card->host);
+
+	ret = mmc_send_status(data, &status);
+	if (!ret)
+		*val = status;
+
+	mmc_release_host(card->host);
+
+	return ret;
+}
+DEFINE_SIMPLE_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
+		NULL, "%08llx\n");
+
+#define EXT_CSD_STR_LEN 1025
+
+static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
+{
+	struct mmc_card *card = inode->i_private;
+	char *buf;
+	ssize_t n = 0;
+	u8 *ext_csd;
+	int err, i;
+
+	buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	ext_csd = kmalloc(512, GFP_KERNEL);
+	if (!ext_csd) {
+		err = -ENOMEM;
+		goto out_free;
+	}
+
+	mmc_claim_host(card->host);
+	err = mmc_send_ext_csd(card, ext_csd);
+	mmc_release_host(card->host);
+	if (err)
+		goto out_free;
+
+	for (i = 511; i >= 0; i--)
+		n += sprintf(buf + n, "%02x", ext_csd[i]);
+	n += sprintf(buf + n, "\n");
+	BUG_ON(n != EXT_CSD_STR_LEN);
+
+	filp->private_data = buf;
+	kfree(ext_csd);
+	return 0;
+
+out_free:
+	kfree(buf);
+	kfree(ext_csd);
+	return err;
+}
+
+static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf,
+				size_t cnt, loff_t *ppos)
+{
+	char *buf = filp->private_data;
+
+	return simple_read_from_buffer(ubuf, cnt, ppos,
+				       buf, EXT_CSD_STR_LEN);
+}
+
+static int mmc_ext_csd_release(struct inode *inode, struct file *file)
+{
+	kfree(file->private_data);
+	return 0;
+}
+
+static const struct file_operations mmc_dbg_ext_csd_fops = {
+	.open		= mmc_ext_csd_open,
+	.read		= mmc_ext_csd_read,
+	.release	= mmc_ext_csd_release,
+	.llseek		= default_llseek,
+};
+
+void mmc_add_card_debugfs(struct mmc_card *card)
+{
+	struct mmc_host	*host = card->host;
+	struct dentry	*root;
+
+	if (!host->debugfs_root)
+		return;
+
+	root = debugfs_create_dir(mmc_card_id(card), host->debugfs_root);
+	if (IS_ERR(root))
+		/* Don't complain -- debugfs just isn't enabled */
+		return;
+	if (!root)
+		/* Complain -- debugfs is enabled, but it failed to
+		 * create the directory. */
+		goto err;
+
+	card->debugfs_root = root;
+
+	if (!debugfs_create_x32("state", S_IRUSR, root, &card->state))
+		goto err;
+
+	if (mmc_card_mmc(card) || mmc_card_sd(card))
+		if (!debugfs_create_file("status", S_IRUSR, root, card,
+					&mmc_dbg_card_status_fops))
+			goto err;
+
+	if (mmc_card_mmc(card))
+		if (!debugfs_create_file("ext_csd", S_IRUSR, root, card,
+					&mmc_dbg_ext_csd_fops))
+			goto err;
+
+	return;
+
+err:
+	debugfs_remove_recursive(root);
+	card->debugfs_root = NULL;
+	dev_err(&card->dev, "failed to initialize debugfs\n");
+}
+
+void mmc_remove_card_debugfs(struct mmc_card *card)
+{
+	debugfs_remove_recursive(card->debugfs_root);
+}
diff --git a/ANDROID_3.4.5/drivers/mmc/core/host.c b/ANDROID_3.4.5/drivers/mmc/core/host.c
new file mode 100644
index 00000000..dd7b1203
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/host.c
@@ -0,0 +1,438 @@
+/*
+ *  linux/drivers/mmc/core/host.c
+ *
+ *  Copyright (C) 2003 Russell King, All Rights Reserved.
+ *  Copyright (C) 2007-2008 Pierre Ossman
+ *  Copyright (C) 2010 Linus Walleij
+ *
+ * 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.
+ *
+ *  MMC host class device management
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/idr.h>
+#include <linux/pagemap.h>
+#include <linux/export.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+#include <linux/suspend.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+
+#include "core.h"
+#include "host.h"
+
+#define cls_dev_to_mmc_host(d)	container_of(d, struct mmc_host, class_dev)
+
+static void mmc_host_classdev_release(struct device *dev)
+{
+	struct mmc_host *host = cls_dev_to_mmc_host(dev);
+	kfree(host);
+}
+
+static struct class mmc_host_class = {
+	.name		= "mmc_host",
+	.dev_release	= mmc_host_classdev_release,
+};
+
+int mmc_register_host_class(void)
+{
+	return class_register(&mmc_host_class);
+}
+
+void mmc_unregister_host_class(void)
+{
+	class_unregister(&mmc_host_class);
+}
+
+static DEFINE_IDR(mmc_host_idr);
+static DEFINE_SPINLOCK(mmc_host_lock);
+
+#ifdef CONFIG_MMC_CLKGATE
+static ssize_t clkgate_delay_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct mmc_host *host = cls_dev_to_mmc_host(dev);
+	return snprintf(buf, PAGE_SIZE, "%lu\n", host->clkgate_delay);
+}
+
+static ssize_t clkgate_delay_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct mmc_host *host = cls_dev_to_mmc_host(dev);
+	unsigned long flags, value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	spin_lock_irqsave(&host->clk_lock, flags);
+	host->clkgate_delay = value;
+	spin_unlock_irqrestore(&host->clk_lock, flags);
+	return count;
+}
+
+/*
+ * Enabling clock gating will make the core call out to the host
+ * once up and once down when it performs a request or card operation
+ * intermingled in any fashion. The driver will see this through
+ * set_ios() operations with ios.clock field set to 0 to gate (disable)
+ * the block clock, and to the old frequency to enable it again.
+ */
+static void mmc_host_clk_gate_delayed(struct mmc_host *host)
+{
+	unsigned long tick_ns;
+	unsigned long freq = host->ios.clock;
+	unsigned long flags;
+
+	if (!freq) {
+		pr_debug("%s: frequency set to 0 in disable function, "
+			 "this means the clock is already disabled.\n",
+			 mmc_hostname(host));
+		return;
+	}
+	/*
+	 * New requests may have appeared while we were scheduling,
+	 * then there is no reason to delay the check before
+	 * clk_disable().
+	 */
+	spin_lock_irqsave(&host->clk_lock, flags);
+
+	/*
+	 * Delay n bus cycles (at least 8 from MMC spec) before attempting
+	 * to disable the MCI block clock. The reference count may have
+	 * gone up again after this delay due to rescheduling!
+	 */
+	if (!host->clk_requests) {
+		spin_unlock_irqrestore(&host->clk_lock, flags);
+		tick_ns = DIV_ROUND_UP(1000000000, freq);
+		ndelay(host->clk_delay * tick_ns);
+	} else {
+		/* New users appeared while waiting for this work */
+		spin_unlock_irqrestore(&host->clk_lock, flags);
+		return;
+	}
+	mutex_lock(&host->clk_gate_mutex);
+	spin_lock_irqsave(&host->clk_lock, flags);
+	if (!host->clk_requests) {
+		spin_unlock_irqrestore(&host->clk_lock, flags);
+		/* This will set host->ios.clock to 0 */
+		mmc_gate_clock(host);
+		spin_lock_irqsave(&host->clk_lock, flags);
+		pr_debug("%s: gated MCI clock\n", mmc_hostname(host));
+	}
+	spin_unlock_irqrestore(&host->clk_lock, flags);
+	mutex_unlock(&host->clk_gate_mutex);
+}
+
+/*
+ * Internal work. Work to disable the clock at some later point.
+ */
+static void mmc_host_clk_gate_work(struct work_struct *work)
+{
+	struct mmc_host *host = container_of(work, struct mmc_host,
+					      clk_gate_work.work);
+
+	mmc_host_clk_gate_delayed(host);
+}
+
+/**
+ *	mmc_host_clk_hold - ungate hardware MCI clocks
+ *	@host: host to ungate.
+ *
+ *	Makes sure the host ios.clock is restored to a non-zero value
+ *	past this call.	Increase clock reference count and ungate clock
+ *	if we're the first user.
+ */
+void mmc_host_clk_hold(struct mmc_host *host)
+{
+	unsigned long flags;
+
+	/* cancel any clock gating work scheduled by mmc_host_clk_release() */
+	cancel_delayed_work_sync(&host->clk_gate_work);
+	mutex_lock(&host->clk_gate_mutex);
+	spin_lock_irqsave(&host->clk_lock, flags);
+	if (host->clk_gated) {
+		spin_unlock_irqrestore(&host->clk_lock, flags);
+		mmc_ungate_clock(host);
+		spin_lock_irqsave(&host->clk_lock, flags);
+		pr_debug("%s: ungated MCI clock\n", mmc_hostname(host));
+	}
+	host->clk_requests++;
+	spin_unlock_irqrestore(&host->clk_lock, flags);
+	mutex_unlock(&host->clk_gate_mutex);
+}
+
+/**
+ *	mmc_host_may_gate_card - check if this card may be gated
+ *	@card: card to check.
+ */
+static bool mmc_host_may_gate_card(struct mmc_card *card)
+{
+	/* If there is no card we may gate it */
+	if (!card)
+		return true;
+	/*
+	 * Don't gate SDIO cards! These need to be clocked at all times
+	 * since they may be independent systems generating interrupts
+	 * and other events. The clock requests counter from the core will
+	 * go down to zero since the core does not need it, but we will not
+	 * gate the clock, because there is somebody out there that may still
+	 * be using it.
+	 */
+	return !(card->quirks & MMC_QUIRK_BROKEN_CLK_GATING);
+}
+
+/**
+ *	mmc_host_clk_release - gate off hardware MCI clocks
+ *	@host: host to gate.
+ *
+ *	Calls the host driver with ios.clock set to zero as often as possible
+ *	in order to gate off hardware MCI clocks. Decrease clock reference
+ *	count and schedule disabling of clock.
+ */
+void mmc_host_clk_release(struct mmc_host *host)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->clk_lock, flags);
+	host->clk_requests--;
+	if (mmc_host_may_gate_card(host->card) &&
+	    !host->clk_requests)
+		queue_delayed_work(system_nrt_wq, &host->clk_gate_work,
+				msecs_to_jiffies(host->clkgate_delay));
+	spin_unlock_irqrestore(&host->clk_lock, flags);
+}
+
+/**
+ *	mmc_host_clk_rate - get current clock frequency setting
+ *	@host: host to get the clock frequency for.
+ *
+ *	Returns current clock frequency regardless of gating.
+ */
+unsigned int mmc_host_clk_rate(struct mmc_host *host)
+{
+	unsigned long freq;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->clk_lock, flags);
+	if (host->clk_gated)
+		freq = host->clk_old;
+	else
+		freq = host->ios.clock;
+	spin_unlock_irqrestore(&host->clk_lock, flags);
+	return freq;
+}
+
+/**
+ *	mmc_host_clk_init - set up clock gating code
+ *	@host: host with potential clock to control
+ */
+static inline void mmc_host_clk_init(struct mmc_host *host)
+{
+	host->clk_requests = 0;
+	/* Hold MCI clock for 8 cycles by default */
+	host->clk_delay = 8;
+	/*
+	 * Default clock gating delay is 0ms to avoid wasting power.
+	 * This value can be tuned by writing into sysfs entry.
+	 */
+	host->clkgate_delay = 0;
+	host->clk_gated = false;
+	INIT_DELAYED_WORK(&host->clk_gate_work, mmc_host_clk_gate_work);
+	spin_lock_init(&host->clk_lock);
+	mutex_init(&host->clk_gate_mutex);
+}
+
+/**
+ *	mmc_host_clk_exit - shut down clock gating code
+ *	@host: host with potential clock to control
+ */
+static inline void mmc_host_clk_exit(struct mmc_host *host)
+{
+	/*
+	 * Wait for any outstanding gate and then make sure we're
+	 * ungated before exiting.
+	 */
+	if (cancel_delayed_work_sync(&host->clk_gate_work))
+		mmc_host_clk_gate_delayed(host);
+	if (host->clk_gated)
+		mmc_host_clk_hold(host);
+	/* There should be only one user now */
+	WARN_ON(host->clk_requests > 1);
+}
+
+static inline void mmc_host_clk_sysfs_init(struct mmc_host *host)
+{
+	host->clkgate_delay_attr.show = clkgate_delay_show;
+	host->clkgate_delay_attr.store = clkgate_delay_store;
+	sysfs_attr_init(&host->clkgate_delay_attr.attr);
+	host->clkgate_delay_attr.attr.name = "clkgate_delay";
+	host->clkgate_delay_attr.attr.mode = S_IRUGO | S_IWUSR;
+	if (device_create_file(&host->class_dev, &host->clkgate_delay_attr))
+		pr_err("%s: Failed to create clkgate_delay sysfs entry\n",
+				mmc_hostname(host));
+}
+#else
+
+static inline void mmc_host_clk_init(struct mmc_host *host)
+{
+}
+
+static inline void mmc_host_clk_exit(struct mmc_host *host)
+{
+}
+
+static inline void mmc_host_clk_sysfs_init(struct mmc_host *host)
+{
+}
+
+#endif
+
+/**
+ *	mmc_alloc_host - initialise the per-host structure.
+ *	@extra: sizeof private data structure
+ *	@dev: pointer to host device model structure
+ *
+ *	Initialise the per-host structure.
+ */
+struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
+{
+	int err;
+	struct mmc_host *host;
+
+	if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
+		return NULL;
+
+	host = kzalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
+	if (!host)
+		return NULL;
+
+	spin_lock(&mmc_host_lock);
+	err = idr_get_new(&mmc_host_idr, host, &host->index);
+	spin_unlock(&mmc_host_lock);
+	if (err)
+		goto free;
+
+	dev_set_name(&host->class_dev, "mmc%d", host->index);
+
+	host->parent = dev;
+	host->class_dev.parent = dev;
+	host->class_dev.class = &mmc_host_class;
+	device_initialize(&host->class_dev);
+
+	mmc_host_clk_init(host);
+
+	spin_lock_init(&host->lock);
+	init_waitqueue_head(&host->wq);
+	wake_lock_init(&host->detect_wake_lock, WAKE_LOCK_SUSPEND,
+		kasprintf(GFP_KERNEL, "%s_detect", mmc_hostname(host)));
+	INIT_DELAYED_WORK(&host->detect, mmc_rescan);
+#ifdef CONFIG_PM
+	host->pm_notify.notifier_call = mmc_pm_notify;
+#endif
+
+	/*
+	 * By default, hosts do not support SGIO or large requests.
+	 * They have to set these according to their abilities.
+	 */
+	host->max_segs = 1;
+	host->max_seg_size = PAGE_CACHE_SIZE;
+
+	host->max_req_size = PAGE_CACHE_SIZE;
+	host->max_blk_size = 512;
+	host->max_blk_count = PAGE_CACHE_SIZE / 512;
+
+	return host;
+
+free:
+	kfree(host);
+	return NULL;
+}
+
+EXPORT_SYMBOL(mmc_alloc_host);
+
+/**
+ *	mmc_add_host - initialise host hardware
+ *	@host: mmc host
+ *
+ *	Register the host with the driver model. The host must be
+ *	prepared to start servicing requests before this function
+ *	completes.
+ */
+int mmc_add_host(struct mmc_host *host)
+{
+	int err;
+
+	WARN_ON((host->caps & MMC_CAP_SDIO_IRQ) &&
+		!host->ops->enable_sdio_irq);
+
+	err = device_add(&host->class_dev);
+	if (err)
+		return err;
+
+	led_trigger_register_simple(dev_name(&host->class_dev), &host->led);
+
+#ifdef CONFIG_DEBUG_FS
+	mmc_add_host_debugfs(host);
+#endif
+	mmc_host_clk_sysfs_init(host);
+
+	mmc_start_host(host);
+	if (!(host->pm_flags & MMC_PM_IGNORE_PM_NOTIFY))
+		register_pm_notifier(&host->pm_notify);
+
+	return 0;
+}
+
+EXPORT_SYMBOL(mmc_add_host);
+
+/**
+ *	mmc_remove_host - remove host hardware
+ *	@host: mmc host
+ *
+ *	Unregister and remove all cards associated with this host,
+ *	and power down the MMC bus. No new requests will be issued
+ *	after this function has returned.
+ */
+void mmc_remove_host(struct mmc_host *host)
+{
+	if (!(host->pm_flags & MMC_PM_IGNORE_PM_NOTIFY))
+		unregister_pm_notifier(&host->pm_notify);
+
+	mmc_stop_host(host);
+
+#ifdef CONFIG_DEBUG_FS
+	mmc_remove_host_debugfs(host);
+#endif
+
+	device_del(&host->class_dev);
+
+	led_trigger_unregister_simple(host->led);
+
+	mmc_host_clk_exit(host);
+}
+
+EXPORT_SYMBOL(mmc_remove_host);
+
+/**
+ *	mmc_free_host - free the host structure
+ *	@host: mmc host
+ *
+ *	Free the host once all references to it have been dropped.
+ */
+void mmc_free_host(struct mmc_host *host)
+{
+	spin_lock(&mmc_host_lock);
+	idr_remove(&mmc_host_idr, host->index);
+	spin_unlock(&mmc_host_lock);
+	wake_lock_destroy(&host->detect_wake_lock);
+
+	put_device(&host->class_dev);
+}
+
+EXPORT_SYMBOL(mmc_free_host);
diff --git a/ANDROID_3.4.5/drivers/mmc/core/host.h b/ANDROID_3.4.5/drivers/mmc/core/host.h
new file mode 100644
index 00000000..f2ab9e57
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/host.h
@@ -0,0 +1,19 @@
+/*
+ *  linux/drivers/mmc/core/host.h
+ *
+ *  Copyright (C) 2003 Russell King, All Rights Reserved.
+ *  Copyright 2007 Pierre Ossman
+ *
+ * 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.
+ */
+#ifndef _MMC_CORE_HOST_H
+#define _MMC_CORE_HOST_H
+#include <linux/mmc/host.h>
+
+int mmc_register_host_class(void);
+void mmc_unregister_host_class(void);
+
+#endif
+
diff --git a/ANDROID_3.4.5/drivers/mmc/core/mmc.c b/ANDROID_3.4.5/drivers/mmc/core/mmc.c
new file mode 100644
index 00000000..54df5adc
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/mmc.c
@@ -0,0 +1,1537 @@
+/*
+ *  linux/drivers/mmc/core/mmc.c
+ *
+ *  Copyright (C) 2003-2004 Russell King, All Rights Reserved.
+ *  Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
+ *  MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
+ *
+ * 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/err.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/mmc.h>
+
+#include "core.h"
+#include "bus.h"
+#include "mmc_ops.h"
+#include "sd_ops.h"
+
+static const unsigned int tran_exp[] = {
+	10000,		100000,		1000000,	10000000,
+	0,		0,		0,		0
+};
+
+static const unsigned char tran_mant[] = {
+	0,	10,	12,	13,	15,	20,	25,	30,
+	35,	40,	45,	50,	55,	60,	70,	80,
+};
+
+static const unsigned int tacc_exp[] = {
+	1,	10,	100,	1000,	10000,	100000,	1000000, 10000000,
+};
+
+static const unsigned int tacc_mant[] = {
+	0,	10,	12,	13,	15,	20,	25,	30,
+	35,	40,	45,	50,	55,	60,	70,	80,
+};
+
+#define UNSTUFF_BITS(resp,start,size)					\
+	({								\
+		const int __size = size;				\
+		const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1;	\
+		const int __off = 3 - ((start) / 32);			\
+		const int __shft = (start) & 31;			\
+		u32 __res;						\
+									\
+		__res = resp[__off] >> __shft;				\
+		if (__size + __shft > 32)				\
+			__res |= resp[__off-1] << ((32 - __shft) % 32);	\
+		__res & __mask;						\
+	})
+
+/*
+ * Given the decoded CSD structure, decode the raw CID to our CID structure.
+ */
+static int mmc_decode_cid(struct mmc_card *card)
+{
+	u32 *resp = card->raw_cid;
+
+	/*
+	 * The selection of the format here is based upon published
+	 * specs from sandisk and from what people have reported.
+	 */
+	switch (card->csd.mmca_vsn) {
+	case 0: /* MMC v1.0 - v1.2 */
+	case 1: /* MMC v1.4 */
+		card->cid.manfid	= UNSTUFF_BITS(resp, 104, 24);
+		card->cid.prod_name[0]	= UNSTUFF_BITS(resp, 96, 8);
+		card->cid.prod_name[1]	= UNSTUFF_BITS(resp, 88, 8);
+		card->cid.prod_name[2]	= UNSTUFF_BITS(resp, 80, 8);
+		card->cid.prod_name[3]	= UNSTUFF_BITS(resp, 72, 8);
+		card->cid.prod_name[4]	= UNSTUFF_BITS(resp, 64, 8);
+		card->cid.prod_name[5]	= UNSTUFF_BITS(resp, 56, 8);
+		card->cid.prod_name[6]	= UNSTUFF_BITS(resp, 48, 8);
+		card->cid.hwrev		= UNSTUFF_BITS(resp, 44, 4);
+		card->cid.fwrev		= UNSTUFF_BITS(resp, 40, 4);
+		card->cid.serial	= UNSTUFF_BITS(resp, 16, 24);
+		card->cid.month		= UNSTUFF_BITS(resp, 12, 4);
+		card->cid.year		= UNSTUFF_BITS(resp, 8, 4) + 1997;
+		break;
+
+	case 2: /* MMC v2.0 - v2.2 */
+	case 3: /* MMC v3.1 - v3.3 */
+	case 4: /* MMC v4 */
+		card->cid.manfid	= UNSTUFF_BITS(resp, 120, 8);
+		card->cid.oemid		= UNSTUFF_BITS(resp, 104, 16);
+		card->cid.prod_name[0]	= UNSTUFF_BITS(resp, 96, 8);
+		card->cid.prod_name[1]	= UNSTUFF_BITS(resp, 88, 8);
+		card->cid.prod_name[2]	= UNSTUFF_BITS(resp, 80, 8);
+		card->cid.prod_name[3]	= UNSTUFF_BITS(resp, 72, 8);
+		card->cid.prod_name[4]	= UNSTUFF_BITS(resp, 64, 8);
+		card->cid.prod_name[5]	= UNSTUFF_BITS(resp, 56, 8);
+		card->cid.serial	= UNSTUFF_BITS(resp, 16, 32);
+		card->cid.month		= UNSTUFF_BITS(resp, 12, 4);
+		card->cid.year		= UNSTUFF_BITS(resp, 8, 4) + 1997;
+		break;
+
+	default:
+		pr_err("%s: card has unknown MMCA version %d\n",
+			mmc_hostname(card->host), card->csd.mmca_vsn);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void mmc_set_erase_size(struct mmc_card *card)
+{
+	if (card->ext_csd.erase_group_def & 1)
+		card->erase_size = card->ext_csd.hc_erase_size;
+	else
+		card->erase_size = card->csd.erase_size;
+
+	mmc_init_erase(card);
+}
+
+/*
+ * Given a 128-bit response, decode to our card CSD structure.
+ */
+static int mmc_decode_csd(struct mmc_card *card)
+{
+	struct mmc_csd *csd = &card->csd;
+	unsigned int e, m, a, b;
+	u32 *resp = card->raw_csd;
+
+	/*
+	 * We only understand CSD structure v1.1 and v1.2.
+	 * v1.2 has extra information in bits 15, 11 and 10.
+	 * We also support eMMC v4.4 & v4.41.
+	 */
+	csd->structure = UNSTUFF_BITS(resp, 126, 2);
+	if (csd->structure == 0) {
+		pr_err("%s: unrecognised CSD structure version %d\n",
+			mmc_hostname(card->host), csd->structure);
+		return -EINVAL;
+	}
+
+	csd->mmca_vsn	 = UNSTUFF_BITS(resp, 122, 4);
+	m = UNSTUFF_BITS(resp, 115, 4);
+	e = UNSTUFF_BITS(resp, 112, 3);
+	csd->tacc_ns	 = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
+	csd->tacc_clks	 = UNSTUFF_BITS(resp, 104, 8) * 100;
+
+	m = UNSTUFF_BITS(resp, 99, 4);
+	e = UNSTUFF_BITS(resp, 96, 3);
+	csd->max_dtr	  = tran_exp[e] * tran_mant[m];
+	csd->cmdclass	  = UNSTUFF_BITS(resp, 84, 12);
+
+	e = UNSTUFF_BITS(resp, 47, 3);
+	m = UNSTUFF_BITS(resp, 62, 12);
+	csd->capacity	  = (1 + m) << (e + 2);
+
+	csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
+	csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
+	csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
+	csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
+	csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
+	csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
+	csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
+
+	if (csd->write_blkbits >= 9) {
+		a = UNSTUFF_BITS(resp, 42, 5);
+		b = UNSTUFF_BITS(resp, 37, 5);
+		csd->erase_size = (a + 1) * (b + 1);
+		csd->erase_size <<= csd->write_blkbits - 9;
+	}
+
+	return 0;
+}
+
+/*
+ * Read extended CSD.
+ */
+static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
+{
+	int err;
+	u8 *ext_csd;
+
+	BUG_ON(!card);
+	BUG_ON(!new_ext_csd);
+
+	*new_ext_csd = NULL;
+
+	if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
+		return 0;
+
+	/*
+	 * As the ext_csd is so large and mostly unused, we don't store the
+	 * raw block in mmc_card.
+	 */
+	ext_csd = kmalloc(512, GFP_KERNEL);
+	if (!ext_csd) {
+		pr_err("%s: could not allocate a buffer to "
+			"receive the ext_csd.\n", mmc_hostname(card->host));
+		return -ENOMEM;
+	}
+
+	err = mmc_send_ext_csd(card, ext_csd);
+	if (err) {
+		kfree(ext_csd);
+		*new_ext_csd = NULL;
+
+		/* If the host or the card can't do the switch,
+		 * fail more gracefully. */
+		if ((err != -EINVAL)
+		 && (err != -ENOSYS)
+		 && (err != -EFAULT))
+			return err;
+
+		/*
+		 * High capacity cards should have this "magic" size
+		 * stored in their CSD.
+		 */
+		if (card->csd.capacity == (4096 * 512)) {
+			pr_err("%s: unable to read EXT_CSD "
+				"on a possible high capacity card. "
+				"Card will be ignored.\n",
+				mmc_hostname(card->host));
+		} else {
+			pr_warning("%s: unable to read "
+				"EXT_CSD, performance might "
+				"suffer.\n",
+				mmc_hostname(card->host));
+			err = 0;
+		}
+	} else
+		*new_ext_csd = ext_csd;
+
+	return err;
+}
+
+/*
+ * Decode extended CSD.
+ */
+static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
+{
+	int err = 0, idx;
+	unsigned int part_size;
+	u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
+
+	BUG_ON(!card);
+
+	if (!ext_csd)
+		return 0;
+
+	/* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
+	card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
+	if (card->csd.structure == 3) {
+		if (card->ext_csd.raw_ext_csd_structure > 2) {
+			pr_err("%s: unrecognised EXT_CSD structure "
+				"version %d\n", mmc_hostname(card->host),
+					card->ext_csd.raw_ext_csd_structure);
+			err = -EINVAL;
+			goto out;
+		}
+	}
+
+	card->ext_csd.rev = ext_csd[EXT_CSD_REV];
+	if (card->ext_csd.rev > 6) {
+		pr_err("%s: unrecognised EXT_CSD revision %d\n",
+			mmc_hostname(card->host), card->ext_csd.rev);
+		err = -EINVAL;
+		goto out;
+	}
+
+	card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
+	card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
+	card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
+	card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
+	if (card->ext_csd.rev >= 2) {
+		card->ext_csd.sectors =
+			ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
+			ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
+			ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
+			ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
+
+		/* Cards with density > 2GiB are sector addressed */
+		if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
+			mmc_card_set_blockaddr(card);
+	}
+	card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
+	switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
+	case EXT_CSD_CARD_TYPE_SDR_ALL:
+	case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_1_8V:
+	case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_1_2V:
+	case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_52:
+		card->ext_csd.hs_max_dtr = 200000000;
+		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_200;
+		break;
+	case EXT_CSD_CARD_TYPE_SDR_1_2V_ALL:
+	case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_1_8V:
+	case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_1_2V:
+	case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_52:
+		card->ext_csd.hs_max_dtr = 200000000;
+		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_1_2V;
+		break;
+	case EXT_CSD_CARD_TYPE_SDR_1_8V_ALL:
+	case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_1_8V:
+	case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_1_2V:
+	case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_52:
+		card->ext_csd.hs_max_dtr = 200000000;
+		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_1_8V;
+		break;
+	case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 |
+	     EXT_CSD_CARD_TYPE_26:
+		card->ext_csd.hs_max_dtr = 52000000;
+		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52;
+		break;
+	case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 |
+	     EXT_CSD_CARD_TYPE_26:
+		card->ext_csd.hs_max_dtr = 52000000;
+		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V;
+		break;
+	case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 |
+	     EXT_CSD_CARD_TYPE_26:
+		card->ext_csd.hs_max_dtr = 52000000;
+		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V;
+		break;
+	case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26:
+		card->ext_csd.hs_max_dtr = 52000000;
+		break;
+	case EXT_CSD_CARD_TYPE_26:
+		card->ext_csd.hs_max_dtr = 26000000;
+		break;
+	default:
+		/* MMC v4 spec says this cannot happen */
+		pr_warning("%s: card is mmc v4 but doesn't "
+			"support any high-speed modes.\n",
+			mmc_hostname(card->host));
+	}
+
+	card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
+	card->ext_csd.raw_erase_timeout_mult =
+		ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
+	card->ext_csd.raw_hc_erase_grp_size =
+		ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+	if (card->ext_csd.rev >= 3) {
+		u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
+		card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
+
+		/* EXT_CSD value is in units of 10ms, but we store in ms */
+		card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
+
+		/* Sleep / awake timeout in 100ns units */
+		if (sa_shift > 0 && sa_shift <= 0x17)
+			card->ext_csd.sa_timeout =
+					1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
+		card->ext_csd.erase_group_def =
+			ext_csd[EXT_CSD_ERASE_GROUP_DEF];
+		card->ext_csd.hc_erase_timeout = 300 *
+			ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
+		card->ext_csd.hc_erase_size =
+			ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
+
+		card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
+
+		/*
+		 * There are two boot regions of equal size, defined in
+		 * multiples of 128K.
+		 */
+		if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
+			for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
+				part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
+				mmc_part_add(card, part_size,
+					EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
+					"boot%d", idx, true,
+					MMC_BLK_DATA_AREA_BOOT);
+			}
+		}
+	}
+
+	card->ext_csd.raw_hc_erase_gap_size =
+		ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+	card->ext_csd.raw_sec_trim_mult =
+		ext_csd[EXT_CSD_SEC_TRIM_MULT];
+	card->ext_csd.raw_sec_erase_mult =
+		ext_csd[EXT_CSD_SEC_ERASE_MULT];
+	card->ext_csd.raw_sec_feature_support =
+		ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
+	card->ext_csd.raw_trim_mult =
+		ext_csd[EXT_CSD_TRIM_MULT];
+	if (card->ext_csd.rev >= 4) {
+		/*
+		 * Enhanced area feature support -- check whether the eMMC
+		 * card has the Enhanced area enabled.  If so, export enhanced
+		 * area offset and size to user by adding sysfs interface.
+		 */
+		card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
+		if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
+		    (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
+			hc_erase_grp_sz =
+				ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+			hc_wp_grp_sz =
+				ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+
+			card->ext_csd.enhanced_area_en = 1;
+			/*
+			 * calculate the enhanced data area offset, in bytes
+			 */
+			card->ext_csd.enhanced_area_offset =
+				(ext_csd[139] << 24) + (ext_csd[138] << 16) +
+				(ext_csd[137] << 8) + ext_csd[136];
+			if (mmc_card_blockaddr(card))
+				card->ext_csd.enhanced_area_offset <<= 9;
+			/*
+			 * calculate the enhanced data area size, in kilobytes
+			 */
+			card->ext_csd.enhanced_area_size =
+				(ext_csd[142] << 16) + (ext_csd[141] << 8) +
+				ext_csd[140];
+			card->ext_csd.enhanced_area_size *=
+				(size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
+			card->ext_csd.enhanced_area_size <<= 9;
+		} else {
+			/*
+			 * If the enhanced area is not enabled, disable these
+			 * device attributes.
+			 */
+			card->ext_csd.enhanced_area_offset = -EINVAL;
+			card->ext_csd.enhanced_area_size = -EINVAL;
+		}
+
+		/*
+		 * General purpose partition feature support --
+		 * If ext_csd has the size of general purpose partitions,
+		 * set size, part_cfg, partition name in mmc_part.
+		 */
+		if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
+			EXT_CSD_PART_SUPPORT_PART_EN) {
+			if (card->ext_csd.enhanced_area_en != 1) {
+				hc_erase_grp_sz =
+					ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+				hc_wp_grp_sz =
+					ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+
+				card->ext_csd.enhanced_area_en = 1;
+			}
+
+			for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
+				if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
+				!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
+				!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
+					continue;
+				part_size =
+				(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
+					<< 16) +
+				(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
+					<< 8) +
+				ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
+				part_size *= (size_t)(hc_erase_grp_sz *
+					hc_wp_grp_sz);
+				mmc_part_add(card, part_size << 19,
+					EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
+					"gp%d", idx, false,
+					MMC_BLK_DATA_AREA_GP);
+			}
+		}
+		card->ext_csd.sec_trim_mult =
+			ext_csd[EXT_CSD_SEC_TRIM_MULT];
+		card->ext_csd.sec_erase_mult =
+			ext_csd[EXT_CSD_SEC_ERASE_MULT];
+		card->ext_csd.sec_feature_support =
+			ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
+		card->ext_csd.trim_timeout = 300 *
+			ext_csd[EXT_CSD_TRIM_MULT];
+
+		/*
+		 * Note that the call to mmc_part_add above defaults to read
+		 * only. If this default assumption is changed, the call must
+		 * take into account the value of boot_locked below.
+		 */
+		card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
+		card->ext_csd.boot_ro_lockable = true;
+	}
+
+	if (card->ext_csd.rev >= 5) {
+		/* check whether the eMMC card supports HPI */
+		if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
+			card->ext_csd.hpi = 1;
+			if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
+				card->ext_csd.hpi_cmd =	MMC_STOP_TRANSMISSION;
+			else
+				card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
+			/*
+			 * Indicate the maximum timeout to close
+			 * a command interrupted by HPI
+			 */
+			card->ext_csd.out_of_int_time =
+				ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
+		}
+
+		card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
+		card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
+	}
+
+	card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
+	if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
+		card->erased_byte = 0xFF;
+	else
+		card->erased_byte = 0x0;
+
+	/* eMMC v4.5 or later */
+	if (card->ext_csd.rev >= 6) {
+		card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
+
+		card->ext_csd.generic_cmd6_time = 10 *
+			ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
+		card->ext_csd.power_off_longtime = 10 *
+			ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
+
+		card->ext_csd.cache_size =
+			ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
+			ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
+			ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
+			ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
+
+		if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
+			card->ext_csd.data_sector_size = 4096;
+		else
+			card->ext_csd.data_sector_size = 512;
+
+		if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
+		    (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
+			card->ext_csd.data_tag_unit_size =
+			((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
+			(card->ext_csd.data_sector_size);
+		} else {
+			card->ext_csd.data_tag_unit_size = 0;
+		}
+	}
+
+out:
+	return err;
+}
+
+static inline void mmc_free_ext_csd(u8 *ext_csd)
+{
+	kfree(ext_csd);
+}
+
+
+static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
+{
+	u8 *bw_ext_csd;
+	int err;
+
+	if (bus_width == MMC_BUS_WIDTH_1)
+		return 0;
+
+	err = mmc_get_ext_csd(card, &bw_ext_csd);
+
+	if (err || bw_ext_csd == NULL) {
+		if (bus_width != MMC_BUS_WIDTH_1)
+			err = -EINVAL;
+		goto out;
+	}
+
+	if (bus_width == MMC_BUS_WIDTH_1)
+		goto out;
+
+	/* only compare read only fields */
+	err = !((card->ext_csd.raw_partition_support ==
+			bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
+		(card->ext_csd.raw_erased_mem_count ==
+			bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
+		(card->ext_csd.rev ==
+			bw_ext_csd[EXT_CSD_REV]) &&
+		(card->ext_csd.raw_ext_csd_structure ==
+			bw_ext_csd[EXT_CSD_STRUCTURE]) &&
+		(card->ext_csd.raw_card_type ==
+			bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
+		(card->ext_csd.raw_s_a_timeout ==
+			bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
+		(card->ext_csd.raw_hc_erase_gap_size ==
+			bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
+		(card->ext_csd.raw_erase_timeout_mult ==
+			bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
+		(card->ext_csd.raw_hc_erase_grp_size ==
+			bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
+		(card->ext_csd.raw_sec_trim_mult ==
+			bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
+		(card->ext_csd.raw_sec_erase_mult ==
+			bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
+		(card->ext_csd.raw_sec_feature_support ==
+			bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
+		(card->ext_csd.raw_trim_mult ==
+			bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
+		(card->ext_csd.raw_sectors[0] ==
+			bw_ext_csd[EXT_CSD_SEC_CNT + 0]) &&
+		(card->ext_csd.raw_sectors[1] ==
+			bw_ext_csd[EXT_CSD_SEC_CNT + 1]) &&
+		(card->ext_csd.raw_sectors[2] ==
+			bw_ext_csd[EXT_CSD_SEC_CNT + 2]) &&
+		(card->ext_csd.raw_sectors[3] ==
+			bw_ext_csd[EXT_CSD_SEC_CNT + 3]));
+	if (err)
+		err = -EINVAL;
+
+out:
+	mmc_free_ext_csd(bw_ext_csd);
+	return err;
+}
+
+MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
+	card->raw_cid[2], card->raw_cid[3]);
+MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
+	card->raw_csd[2], card->raw_csd[3]);
+MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
+MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
+MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
+MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
+MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
+MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
+MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
+MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
+MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
+MMC_DEV_ATTR(enhanced_area_offset, "%llu\n",
+		card->ext_csd.enhanced_area_offset);
+MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size);
+
+static struct attribute *mmc_std_attrs[] = {
+	&dev_attr_cid.attr,
+	&dev_attr_csd.attr,
+	&dev_attr_date.attr,
+	&dev_attr_erase_size.attr,
+	&dev_attr_preferred_erase_size.attr,
+	&dev_attr_fwrev.attr,
+	&dev_attr_hwrev.attr,
+	&dev_attr_manfid.attr,
+	&dev_attr_name.attr,
+	&dev_attr_oemid.attr,
+	&dev_attr_serial.attr,
+	&dev_attr_enhanced_area_offset.attr,
+	&dev_attr_enhanced_area_size.attr,
+	NULL,
+};
+
+static struct attribute_group mmc_std_attr_group = {
+	.attrs = mmc_std_attrs,
+};
+
+static const struct attribute_group *mmc_attr_groups[] = {
+	&mmc_std_attr_group,
+	NULL,
+};
+
+static struct device_type mmc_type = {
+	.groups = mmc_attr_groups,
+};
+
+/*
+ * Select the PowerClass for the current bus width
+ * If power class is defined for 4/8 bit bus in the
+ * extended CSD register, select it by executing the
+ * mmc_switch command.
+ */
+static int mmc_select_powerclass(struct mmc_card *card,
+		unsigned int bus_width, u8 *ext_csd)
+{
+	int err = 0;
+	unsigned int pwrclass_val;
+	unsigned int index = 0;
+	struct mmc_host *host;
+
+	BUG_ON(!card);
+
+	host = card->host;
+	BUG_ON(!host);
+
+	if (ext_csd == NULL)
+		return 0;
+
+	/* Power class selection is supported for versions >= 4.0 */
+	if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
+		return 0;
+
+	/* Power class values are defined only for 4/8 bit bus */
+	if (bus_width == EXT_CSD_BUS_WIDTH_1)
+		return 0;
+
+	switch (1 << host->ios.vdd) {
+	case MMC_VDD_165_195:
+		if (host->ios.clock <= 26000000)
+			index = EXT_CSD_PWR_CL_26_195;
+		else if	(host->ios.clock <= 52000000)
+			index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
+				EXT_CSD_PWR_CL_52_195 :
+				EXT_CSD_PWR_CL_DDR_52_195;
+		else if (host->ios.clock <= 200000000)
+			index = EXT_CSD_PWR_CL_200_195;
+		break;
+	case MMC_VDD_27_28:
+	case MMC_VDD_28_29:
+	case MMC_VDD_29_30:
+	case MMC_VDD_30_31:
+	case MMC_VDD_31_32:
+	case MMC_VDD_32_33:
+	case MMC_VDD_33_34:
+	case MMC_VDD_34_35:
+	case MMC_VDD_35_36:
+		if (host->ios.clock <= 26000000)
+			index = EXT_CSD_PWR_CL_26_360;
+		else if	(host->ios.clock <= 52000000)
+			index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
+				EXT_CSD_PWR_CL_52_360 :
+				EXT_CSD_PWR_CL_DDR_52_360;
+		else if (host->ios.clock <= 200000000)
+			index = EXT_CSD_PWR_CL_200_360;
+		break;
+	default:
+		pr_warning("%s: Voltage range not supported "
+			   "for power class.\n", mmc_hostname(host));
+		return -EINVAL;
+	}
+
+	pwrclass_val = ext_csd[index];
+
+	if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
+		pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
+				EXT_CSD_PWR_CL_8BIT_SHIFT;
+	else
+		pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
+				EXT_CSD_PWR_CL_4BIT_SHIFT;
+
+	/* If the power class is different from the default value */
+	if (pwrclass_val > 0) {
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 EXT_CSD_POWER_CLASS,
+				 pwrclass_val,
+				 card->ext_csd.generic_cmd6_time);
+	}
+
+	return err;
+}
+
+/*
+ * Selects the desired buswidth and switch to the HS200 mode
+ * if bus width set without error
+ */
+static int mmc_select_hs200(struct mmc_card *card)
+{
+	int idx, err = 0;
+	struct mmc_host *host;
+	static unsigned ext_csd_bits[] = {
+		EXT_CSD_BUS_WIDTH_4,
+		EXT_CSD_BUS_WIDTH_8,
+	};
+	static unsigned bus_widths[] = {
+		MMC_BUS_WIDTH_4,
+		MMC_BUS_WIDTH_8,
+	};
+
+	BUG_ON(!card);
+
+	host = card->host;
+
+	if (card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_2V &&
+	    host->caps2 & MMC_CAP2_HS200_1_2V_SDR)
+		if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120, 0))
+			err = mmc_set_signal_voltage(host,
+						     MMC_SIGNAL_VOLTAGE_180, 0);
+
+	/* If fails try again during next card power cycle */
+	if (err)
+		goto err;
+
+	idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 1 : 0;
+
+	/*
+	 * Unlike SD, MMC cards dont have a configuration register to notify
+	 * supported bus width. So bus test command should be run to identify
+	 * the supported bus width or compare the ext csd values of current
+	 * bus width and ext csd values of 1 bit mode read earlier.
+	 */
+	for (; idx >= 0; idx--) {
+
+		/*
+		 * Host is capable of 8bit transfer, then switch
+		 * the device to work in 8bit transfer mode. If the
+		 * mmc switch command returns error then switch to
+		 * 4bit transfer mode. On success set the corresponding
+		 * bus width on the host.
+		 */
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 EXT_CSD_BUS_WIDTH,
+				 ext_csd_bits[idx],
+				 card->ext_csd.generic_cmd6_time);
+		if (err)
+			continue;
+
+		mmc_set_bus_width(card->host, bus_widths[idx]);
+
+		if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
+			err = mmc_compare_ext_csds(card, bus_widths[idx]);
+		else
+			err = mmc_bus_test(card, bus_widths[idx]);
+		if (!err)
+			break;
+	}
+
+	/* switch to HS200 mode if bus width set successfully */
+	if (!err)
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 EXT_CSD_HS_TIMING, 2, 0);
+err:
+	return err;
+}
+
+/*
+ * Handle the detection and initialisation of a card.
+ *
+ * In the case of a resume, "oldcard" will contain the card
+ * we're trying to reinitialise.
+ */
+static int mmc_init_card(struct mmc_host *host, u32 ocr,
+	struct mmc_card *oldcard)
+{
+	struct mmc_card *card;
+	int err, ddr = 0;
+	u32 cid[4];
+	unsigned int max_dtr;
+	u32 rocr;
+	u8 *ext_csd = NULL;
+
+	BUG_ON(!host);
+	WARN_ON(!host->claimed);
+
+	/* Set correct bus mode for MMC before attempting init */
+	if (!mmc_host_is_spi(host))
+		mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
+
+	/* Initialization should be done at 3.3 V I/O voltage. */
+	mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
+
+	/*
+	 * Since we're changing the OCR value, we seem to
+	 * need to tell some cards to go back to the idle
+	 * state.  We wait 1ms to give cards time to
+	 * respond.
+	 * mmc_go_idle is needed for eMMC that are asleep
+	 */
+	mmc_go_idle(host);
+
+	/* The extra bit indicates that we support high capacity */
+	err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
+	if (err)
+		goto err;
+
+	/*
+	 * For SPI, enable CRC as appropriate.
+	 */
+	if (mmc_host_is_spi(host)) {
+		err = mmc_spi_set_crc(host, use_spi_crc);
+		if (err)
+			goto err;
+	}
+
+	/*
+	 * Fetch CID from card.
+	 */
+	if (mmc_host_is_spi(host))
+		err = mmc_send_cid(host, cid);
+	else
+		err = mmc_all_send_cid(host, cid);
+	if (err)
+		goto err;
+
+	if (oldcard) {
+		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
+			err = -ENOENT;
+			goto err;
+		}
+
+		card = oldcard;
+	} else {
+		/*
+		 * Allocate card structure.
+		 */
+		card = mmc_alloc_card(host, &mmc_type);
+		if (IS_ERR(card)) {
+			err = PTR_ERR(card);
+			goto err;
+		}
+
+		card->type = MMC_TYPE_MMC;
+		card->rca = 1;
+		memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
+	}
+
+	/*
+	 * For native busses:  set card RCA and quit open drain mode.
+	 */
+	if (!mmc_host_is_spi(host)) {
+		err = mmc_set_relative_addr(card);
+		if (err)
+			goto free_card;
+
+		mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+	}
+
+	if (!oldcard) {
+		/*
+		 * Fetch CSD from card.
+		 */
+		err = mmc_send_csd(card, card->raw_csd);
+		if (err)
+			goto free_card;
+
+		err = mmc_decode_csd(card);
+		if (err)
+			goto free_card;
+		err = mmc_decode_cid(card);
+		if (err)
+			goto free_card;
+	}
+
+	/*
+	 * Select card, as all following commands rely on that.
+	 */
+	if (!mmc_host_is_spi(host)) {
+		err = mmc_select_card(card);
+		if (err)
+			goto free_card;
+	}
+
+	if (!oldcard) {
+		/*
+		 * Fetch and process extended CSD.
+		 */
+
+		err = mmc_get_ext_csd(card, &ext_csd);
+		if (err)
+			goto free_card;
+		err = mmc_read_ext_csd(card, ext_csd);
+		if (err)
+			goto free_card;
+
+		/* If doing byte addressing, check if required to do sector
+		 * addressing.  Handle the case of <2GB cards needing sector
+		 * addressing.  See section 8.1 JEDEC Standard JED84-A441;
+		 * ocr register has bit 30 set for sector addressing.
+		 */
+		if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
+			mmc_card_set_blockaddr(card);
+
+		/* Erase size depends on CSD and Extended CSD */
+		mmc_set_erase_size(card);
+	}
+
+	/*
+	 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
+	 * bit.  This bit will be lost every time after a reset or power off.
+	 */
+	if (card->ext_csd.enhanced_area_en ||
+	    (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 EXT_CSD_ERASE_GROUP_DEF, 1,
+				 card->ext_csd.generic_cmd6_time);
+
+		if (err && err != -EBADMSG)
+			goto free_card;
+
+		if (err) {
+			err = 0;
+			/*
+			 * Just disable enhanced area off & sz
+			 * will try to enable ERASE_GROUP_DEF
+			 * during next time reinit
+			 */
+			card->ext_csd.enhanced_area_offset = -EINVAL;
+			card->ext_csd.enhanced_area_size = -EINVAL;
+		} else {
+			card->ext_csd.erase_group_def = 1;
+			/*
+			 * enable ERASE_GRP_DEF successfully.
+			 * This will affect the erase size, so
+			 * here need to reset erase size
+			 */
+			mmc_set_erase_size(card);
+		}
+	}
+
+	/*
+	 * Ensure eMMC user default partition is enabled
+	 */
+	if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
+		card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
+				 card->ext_csd.part_config,
+				 card->ext_csd.part_time);
+		if (err && err != -EBADMSG)
+			goto free_card;
+	}
+
+	/*
+	 * If the host supports the power_off_notify capability then
+	 * set the notification byte in the ext_csd register of device
+	 */
+	if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) &&
+	    (card->ext_csd.rev >= 6)) {
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 EXT_CSD_POWER_OFF_NOTIFICATION,
+				 EXT_CSD_POWER_ON,
+				 card->ext_csd.generic_cmd6_time);
+		if (err && err != -EBADMSG)
+			goto free_card;
+
+		/*
+		 * The err can be -EBADMSG or 0,
+		 * so check for success and update the flag
+		 */
+		if (!err)
+			card->poweroff_notify_state = MMC_POWERED_ON;
+	}
+
+	/*
+	 * Activate high speed (if supported)
+	 */
+	if (card->ext_csd.hs_max_dtr != 0) {
+		err = 0;
+		if (card->ext_csd.hs_max_dtr > 52000000 &&
+		    host->caps2 & MMC_CAP2_HS200)
+			err = mmc_select_hs200(card);
+		else if	(host->caps & MMC_CAP_MMC_HIGHSPEED)
+			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+					 EXT_CSD_HS_TIMING, 1,
+					 card->ext_csd.generic_cmd6_time);
+
+		if (err && err != -EBADMSG)
+			goto free_card;
+
+		if (err) {
+			pr_warning("%s: switch to highspeed failed\n",
+			       mmc_hostname(card->host));
+			err = 0;
+		} else {
+			if (card->ext_csd.hs_max_dtr > 52000000 &&
+			    host->caps2 & MMC_CAP2_HS200) {
+				mmc_card_set_hs200(card);
+				mmc_set_timing(card->host,
+					       MMC_TIMING_MMC_HS200);
+			} else {
+				mmc_card_set_highspeed(card);
+				mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
+			}
+		}
+	}
+
+	/*
+	 * Compute bus speed.
+	 */
+	max_dtr = (unsigned int)-1;
+
+	if (mmc_card_highspeed(card) || mmc_card_hs200(card)) {
+		if (max_dtr > card->ext_csd.hs_max_dtr)
+			max_dtr = card->ext_csd.hs_max_dtr;
+	} else if (max_dtr > card->csd.max_dtr) {
+		max_dtr = card->csd.max_dtr;
+	}
+
+	mmc_set_clock(host, max_dtr);
+
+	/*
+	 * Indicate DDR mode (if supported).
+	 */
+	if (mmc_card_highspeed(card)) {
+		if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
+			&& ((host->caps & (MMC_CAP_1_8V_DDR |
+			     MMC_CAP_UHS_DDR50))
+				== (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
+				ddr = MMC_1_8V_DDR_MODE;
+		else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
+			&& ((host->caps & (MMC_CAP_1_2V_DDR |
+			     MMC_CAP_UHS_DDR50))
+				== (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
+				ddr = MMC_1_2V_DDR_MODE;
+	}
+
+	/*
+	 * Indicate HS200 SDR mode (if supported).
+	 */
+	if (mmc_card_hs200(card)) {
+		u32 ext_csd_bits;
+		u32 bus_width = card->host->ios.bus_width;
+
+		/*
+		 * For devices supporting HS200 mode, the bus width has
+		 * to be set before executing the tuning function. If
+		 * set before tuning, then device will respond with CRC
+		 * errors for responses on CMD line. So for HS200 the
+		 * sequence will be
+		 * 1. set bus width 4bit / 8 bit (1 bit not supported)
+		 * 2. switch to HS200 mode
+		 * 3. set the clock to > 52Mhz <=200MHz and
+		 * 4. execute tuning for HS200
+		 */
+		if ((host->caps2 & MMC_CAP2_HS200) &&
+		    card->host->ops->execute_tuning) {
+			mmc_host_clk_hold(card->host);
+			err = card->host->ops->execute_tuning(card->host,
+				MMC_SEND_TUNING_BLOCK_HS200);
+			mmc_host_clk_release(card->host);
+		}
+		if (err) {
+			pr_warning("%s: tuning execution failed\n",
+				   mmc_hostname(card->host));
+			goto err;
+		}
+
+		ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
+				EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
+		err = mmc_select_powerclass(card, ext_csd_bits, ext_csd);
+		if (err)
+			pr_warning("%s: power class selection to bus width %d"
+				   " failed\n", mmc_hostname(card->host),
+				   1 << bus_width);
+	}
+
+	/*
+	 * Activate wide bus and DDR (if supported).
+	 */
+	if (!mmc_card_hs200(card) &&
+	    (card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
+	    (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
+		static unsigned ext_csd_bits[][2] = {
+			{ EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
+			{ EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
+			{ EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
+		};
+		static unsigned bus_widths[] = {
+			MMC_BUS_WIDTH_8,
+			MMC_BUS_WIDTH_4,
+			MMC_BUS_WIDTH_1
+		};
+		unsigned idx, bus_width = 0;
+
+		if (host->caps & MMC_CAP_8_BIT_DATA)
+			idx = 0;
+		else
+			idx = 1;
+		for (; idx < ARRAY_SIZE(bus_widths); idx++) {
+			bus_width = bus_widths[idx];
+			if (bus_width == MMC_BUS_WIDTH_1)
+				ddr = 0; /* no DDR for 1-bit width */
+			err = mmc_select_powerclass(card, ext_csd_bits[idx][0],
+						    ext_csd);
+			if (err)
+				pr_warning("%s: power class selection to "
+					   "bus width %d failed\n",
+					   mmc_hostname(card->host),
+					   1 << bus_width);
+
+			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+					 EXT_CSD_BUS_WIDTH,
+					 ext_csd_bits[idx][0],
+					 card->ext_csd.generic_cmd6_time);
+			if (!err) {
+				mmc_set_bus_width(card->host, bus_width);
+
+				/*
+				 * If controller can't handle bus width test,
+				 * compare ext_csd previously read in 1 bit mode
+				 * against ext_csd at new bus width
+				 */
+				if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
+					err = mmc_compare_ext_csds(card,
+						bus_width);
+				else
+					err = mmc_bus_test(card, bus_width);
+				if (!err)
+					break;
+			}
+		}
+
+		if (!err && ddr) {
+			err = mmc_select_powerclass(card, ext_csd_bits[idx][1],
+						    ext_csd);
+			if (err)
+				pr_warning("%s: power class selection to "
+					   "bus width %d ddr %d failed\n",
+					   mmc_hostname(card->host),
+					   1 << bus_width, ddr);
+
+			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+					 EXT_CSD_BUS_WIDTH,
+					 ext_csd_bits[idx][1],
+					 card->ext_csd.generic_cmd6_time);
+		}
+		if (err) {
+			pr_warning("%s: switch to bus width %d ddr %d "
+				"failed\n", mmc_hostname(card->host),
+				1 << bus_width, ddr);
+			goto free_card;
+		} else if (ddr) {
+			/*
+			 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
+			 * signaling.
+			 *
+			 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
+			 *
+			 * 1.8V vccq at 3.3V core voltage (vcc) is not required
+			 * in the JEDEC spec for DDR.
+			 *
+			 * Do not force change in vccq since we are obviously
+			 * working and no change to vccq is needed.
+			 *
+			 * WARNING: eMMC rules are NOT the same as SD DDR
+			 */
+			if (ddr == MMC_1_2V_DDR_MODE) {
+				err = mmc_set_signal_voltage(host,
+					MMC_SIGNAL_VOLTAGE_120, 0);
+				if (err)
+					goto err;
+			}
+			mmc_card_set_ddr_mode(card);
+			mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
+			mmc_set_bus_width(card->host, bus_width);
+		}
+	}
+
+	/*
+	 * Enable HPI feature (if supported)
+	 */
+	if (card->ext_csd.hpi) {
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				EXT_CSD_HPI_MGMT, 1,
+				card->ext_csd.generic_cmd6_time);
+		if (err && err != -EBADMSG)
+			goto free_card;
+		if (err) {
+			pr_warning("%s: Enabling HPI failed\n",
+				   mmc_hostname(card->host));
+			err = 0;
+		} else
+			card->ext_csd.hpi_en = 1;
+	}
+
+	/*
+	 * If cache size is higher than 0, this indicates
+	 * the existence of cache and it can be turned on.
+	 */
+	if ((host->caps2 & MMC_CAP2_CACHE_CTRL) &&
+			card->ext_csd.cache_size > 0) {
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				EXT_CSD_CACHE_CTRL, 1,
+				card->ext_csd.generic_cmd6_time);
+		if (err && err != -EBADMSG)
+			goto free_card;
+
+		/*
+		 * Only if no error, cache is turned on successfully.
+		 */
+		if (err) {
+			pr_warning("%s: Cache is supported, "
+					"but failed to turn on (%d)\n",
+					mmc_hostname(card->host), err);
+			card->ext_csd.cache_ctrl = 0;
+			err = 0;
+		} else {
+			card->ext_csd.cache_ctrl = 1;
+		}
+	}
+
+	if (!oldcard)
+		host->card = card;
+
+	mmc_free_ext_csd(ext_csd);
+	return 0;
+
+free_card:
+	if (!oldcard)
+		mmc_remove_card(card);
+err:
+	mmc_free_ext_csd(ext_csd);
+
+	return err;
+}
+
+/*
+ * Host is being removed. Free up the current card.
+ */
+static void mmc_remove(struct mmc_host *host)
+{
+	BUG_ON(!host);
+	BUG_ON(!host->card);
+
+	mmc_remove_card(host->card);
+	host->card = NULL;
+}
+
+/*
+ * Card detection - card is alive.
+ */
+static int mmc_alive(struct mmc_host *host)
+{
+	return mmc_send_status(host->card, NULL);
+}
+
+/*
+ * Card detection callback from host.
+ */
+static void mmc_detect(struct mmc_host *host)
+{
+	int err;
+
+	BUG_ON(!host);
+	BUG_ON(!host->card);
+
+	mmc_claim_host(host);
+
+	/*
+	 * Just check if our card has been removed.
+	 */
+	err = _mmc_detect_card_removed(host);
+
+	mmc_release_host(host);
+
+	if (err) {
+		mmc_remove(host);
+
+		mmc_claim_host(host);
+		mmc_detach_bus(host);
+		mmc_power_off(host);
+		mmc_release_host(host);
+	}
+}
+
+/*
+ * Suspend callback from host.
+ */
+static int mmc_suspend(struct mmc_host *host)
+{
+	int err = 0;
+
+	BUG_ON(!host);
+	BUG_ON(!host->card);
+
+	mmc_claim_host(host);
+	if (mmc_card_can_sleep(host)) {
+		err = mmc_card_sleep(host);
+		if (!err)
+			mmc_card_set_sleep(host->card);
+	} else if (!mmc_host_is_spi(host))
+		mmc_deselect_cards(host);
+	host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
+	mmc_release_host(host);
+
+	return err;
+}
+
+/*
+ * Resume callback from host.
+ *
+ * This function tries to determine if the same card is still present
+ * and, if so, restore all state to it.
+ */
+static int mmc_resume(struct mmc_host *host)
+{
+	int err;
+
+	BUG_ON(!host);
+	BUG_ON(!host->card);
+
+	mmc_claim_host(host);
+	if (mmc_card_is_sleep(host->card)) {
+		err = mmc_card_awake(host);
+		mmc_card_clr_sleep(host->card);
+	} else
+		err = mmc_init_card(host, host->ocr, host->card);
+	mmc_release_host(host);
+
+	return err;
+}
+
+static int mmc_power_restore(struct mmc_host *host)
+{
+	int ret;
+
+	host->card->state &= ~(MMC_STATE_HIGHSPEED | MMC_STATE_HIGHSPEED_200);
+	mmc_card_clr_sleep(host->card);
+	mmc_claim_host(host);
+	ret = mmc_init_card(host, host->ocr, host->card);
+	mmc_release_host(host);
+
+	return ret;
+}
+
+static int mmc_sleep(struct mmc_host *host)
+{
+	struct mmc_card *card = host->card;
+	int err = -ENOSYS;
+
+	if (card && card->ext_csd.rev >= 3) {
+		err = mmc_card_sleepawake(host, 1);
+		if (err < 0)
+			pr_debug("%s: Error %d while putting card into sleep",
+				 mmc_hostname(host), err);
+	}
+
+	return err;
+}
+
+static int mmc_awake(struct mmc_host *host)
+{
+	struct mmc_card *card = host->card;
+	int err = -ENOSYS;
+
+	if (card && card->ext_csd.rev >= 3) {
+		err = mmc_card_sleepawake(host, 0);
+		if (err < 0)
+			pr_debug("%s: Error %d while awaking sleeping card",
+				 mmc_hostname(host), err);
+	}
+
+	return err;
+}
+
+static const struct mmc_bus_ops mmc_ops = {
+	.awake = mmc_awake,
+	.sleep = mmc_sleep,
+	.remove = mmc_remove,
+	.detect = mmc_detect,
+	.suspend = NULL,
+	.resume = NULL,
+	.power_restore = mmc_power_restore,
+	.alive = mmc_alive,
+};
+
+static const struct mmc_bus_ops mmc_ops_unsafe = {
+	.awake = mmc_awake,
+	.sleep = mmc_sleep,
+	.remove = mmc_remove,
+	.detect = mmc_detect,
+	.suspend = mmc_suspend,
+	.resume = mmc_resume,
+	.power_restore = mmc_power_restore,
+	.alive = mmc_alive,
+};
+
+static void mmc_attach_bus_ops(struct mmc_host *host)
+{
+	const struct mmc_bus_ops *bus_ops;
+
+	if (!mmc_card_is_removable(host))
+		bus_ops = &mmc_ops_unsafe;
+	else
+		bus_ops = &mmc_ops;
+	mmc_attach_bus(host, bus_ops);
+}
+
+/*
+ * Starting point for MMC card init.
+ */
+int mmc_attach_mmc(struct mmc_host *host)
+{
+	int err;
+	u32 ocr;
+
+	BUG_ON(!host);
+	WARN_ON(!host->claimed);
+
+	/* Set correct bus mode for MMC before attempting attach */
+	if (!mmc_host_is_spi(host))
+		mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
+
+	err = mmc_send_op_cond(host, 0, &ocr);
+	if (err)
+		return err;
+
+	mmc_attach_bus_ops(host);
+	if (host->ocr_avail_mmc)
+		host->ocr_avail = host->ocr_avail_mmc;
+
+	/*
+	 * We need to get OCR a different way for SPI.
+	 */
+	if (mmc_host_is_spi(host)) {
+		err = mmc_spi_read_ocr(host, 1, &ocr);
+		if (err)
+			goto err;
+	}
+
+	/*
+	 * Sanity check the voltages that the card claims to
+	 * support.
+	 */
+	if (ocr & 0x7F) {
+		pr_warning("%s: card claims to support voltages "
+		       "below the defined range. These will be ignored.\n",
+		       mmc_hostname(host));
+		ocr &= ~0x7F;
+	}
+
+	host->ocr = mmc_select_voltage(host, ocr);
+
+	/*
+	 * Can we support the voltage of the card?
+	 */
+	if (!host->ocr) {
+		err = -EINVAL;
+		goto err;
+	}
+
+	/*
+	 * Detect and init the card.
+	 */
+	err = mmc_init_card(host, host->ocr, NULL);
+	if (err)
+		goto err;
+
+	mmc_release_host(host);
+	err = mmc_add_card(host->card);
+	mmc_claim_host(host);
+	if (err)
+		goto remove_card;
+
+	return 0;
+
+remove_card:
+	mmc_release_host(host);
+	mmc_remove_card(host->card);
+	mmc_claim_host(host);
+	host->card = NULL;
+err:
+	mmc_detach_bus(host);
+
+	pr_err("%s: error %d whilst initialising MMC card\n",
+		mmc_hostname(host), err);
+
+	return err;
+}
diff --git a/ANDROID_3.4.5/drivers/mmc/core/mmc_ops.c b/ANDROID_3.4.5/drivers/mmc/core/mmc_ops.c
new file mode 100644
index 00000000..69370f49
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/mmc_ops.c
@@ -0,0 +1,585 @@
+/*
+ *  linux/drivers/mmc/core/mmc_ops.h
+ *
+ *  Copyright 2006-2007 Pierre Ossman
+ *
+ * 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.
+ */
+
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <linux/types.h>
+#include <linux/scatterlist.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/mmc.h>
+
+#include "core.h"
+#include "mmc_ops.h"
+
+static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
+{
+	int err;
+	struct mmc_command cmd = {0};
+
+	BUG_ON(!host);
+
+	cmd.opcode = MMC_SELECT_CARD;
+
+	if (card) {
+		cmd.arg = card->rca << 16;
+		cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+	} else {
+		cmd.arg = 0;
+		cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
+	}
+
+	err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+int mmc_select_card(struct mmc_card *card)
+{
+	BUG_ON(!card);
+
+	return _mmc_select_card(card->host, card);
+}
+
+int mmc_deselect_cards(struct mmc_host *host)
+{
+	return _mmc_select_card(host, NULL);
+}
+
+int mmc_card_sleepawake(struct mmc_host *host, int sleep)
+{
+	struct mmc_command cmd = {0};
+	struct mmc_card *card = host->card;
+	int err;
+
+	if (sleep)
+		mmc_deselect_cards(host);
+
+	cmd.opcode = MMC_SLEEP_AWAKE;
+	cmd.arg = card->rca << 16;
+	if (sleep)
+		cmd.arg |= 1 << 15;
+
+	cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
+	err = mmc_wait_for_cmd(host, &cmd, 0);
+	if (err)
+		return err;
+
+	/*
+	 * If the host does not wait while the card signals busy, then we will
+	 * will have to wait the sleep/awake timeout.  Note, we cannot use the
+	 * SEND_STATUS command to poll the status because that command (and most
+	 * others) is invalid while the card sleeps.
+	 */
+	if (!(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
+		mmc_delay(DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000));
+
+	if (!sleep)
+		err = mmc_select_card(card);
+
+	return err;
+}
+
+int mmc_go_idle(struct mmc_host *host)
+{
+	int err;
+	struct mmc_command cmd = {0};
+
+	/*
+	 * Non-SPI hosts need to prevent chipselect going active during
+	 * GO_IDLE; that would put chips into SPI mode.  Remind them of
+	 * that in case of hardware that won't pull up DAT3/nCS otherwise.
+	 *
+	 * SPI hosts ignore ios.chip_select; it's managed according to
+	 * rules that must accommodate non-MMC slaves which this layer
+	 * won't even know about.
+	 */
+	if (!mmc_host_is_spi(host)) {
+		mmc_set_chip_select(host, MMC_CS_HIGH);
+		mmc_delay(1);
+	}
+
+	cmd.opcode = MMC_GO_IDLE_STATE;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC;
+
+	err = mmc_wait_for_cmd(host, &cmd, 0);
+
+	mmc_delay(1);
+
+	if (!mmc_host_is_spi(host)) {
+		mmc_set_chip_select(host, MMC_CS_DONTCARE);
+		mmc_delay(1);
+	}
+
+	host->use_spi_crc = 0;
+
+	return err;
+}
+
+int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
+{
+	struct mmc_command cmd = {0};
+	int i, err = 0;
+
+	BUG_ON(!host);
+
+	cmd.opcode = MMC_SEND_OP_COND;
+	cmd.arg = mmc_host_is_spi(host) ? 0 : ocr;
+	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
+
+	for (i = 100; i; i--) {
+		err = mmc_wait_for_cmd(host, &cmd, 0);
+		if (err)
+			break;
+
+		/* if we're just probing, do a single pass */
+		if (ocr == 0)
+			break;
+
+		/* otherwise wait until reset completes */
+		if (mmc_host_is_spi(host)) {
+			if (!(cmd.resp[0] & R1_SPI_IDLE))
+				break;
+		} else {
+			if (cmd.resp[0] & MMC_CARD_BUSY)
+				break;
+		}
+
+		err = -ETIMEDOUT;
+
+		mmc_delay(10);
+	}
+
+	if (rocr && !mmc_host_is_spi(host))
+		*rocr = cmd.resp[0];
+
+	return err;
+}
+
+int mmc_all_send_cid(struct mmc_host *host, u32 *cid)
+{
+	int err;
+	struct mmc_command cmd = {0};
+
+	BUG_ON(!host);
+	BUG_ON(!cid);
+
+	cmd.opcode = MMC_ALL_SEND_CID;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;
+
+	err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
+	if (err)
+		return err;
+
+	memcpy(cid, cmd.resp, sizeof(u32) * 4);
+
+	return 0;
+}
+
+int mmc_set_relative_addr(struct mmc_card *card)
+{
+	int err;
+	struct mmc_command cmd = {0};
+
+	BUG_ON(!card);
+	BUG_ON(!card->host);
+
+	cmd.opcode = MMC_SET_RELATIVE_ADDR;
+	cmd.arg = card->rca << 16;
+	cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+	err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static int
+mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)
+{
+	int err;
+	struct mmc_command cmd = {0};
+
+	BUG_ON(!host);
+	BUG_ON(!cxd);
+
+	cmd.opcode = opcode;
+	cmd.arg = arg;
+	cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
+
+	err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
+	if (err)
+		return err;
+
+	memcpy(cxd, cmd.resp, sizeof(u32) * 4);
+
+	return 0;
+}
+
+static int
+mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
+		u32 opcode, void *buf, unsigned len)
+{
+	struct mmc_request mrq = {NULL};
+	struct mmc_command cmd = {0};
+	struct mmc_data data = {0};
+	struct scatterlist sg;
+	void *data_buf;
+
+	/* dma onto stack is unsafe/nonportable, but callers to this
+	 * routine normally provide temporary on-stack buffers ...
+	 */
+	data_buf = kmalloc(len, GFP_KERNEL);
+	if (data_buf == NULL)
+		return -ENOMEM;
+
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+
+	cmd.opcode = opcode;
+	cmd.arg = 0;
+
+	/* NOTE HACK:  the MMC_RSP_SPI_R1 is always correct here, but we
+	 * rely on callers to never use this with "native" calls for reading
+	 * CSD or CID.  Native versions of those commands use the R2 type,
+	 * not R1 plus a data block.
+	 */
+	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
+
+	data.blksz = len;
+	data.blocks = 1;
+	data.flags = MMC_DATA_READ;
+	data.sg = &sg;
+	data.sg_len = 1;
+
+	sg_init_one(&sg, data_buf, len);
+
+	if (opcode == MMC_SEND_CSD || opcode == MMC_SEND_CID) {
+		/*
+		 * The spec states that CSR and CID accesses have a timeout
+		 * of 64 clock cycles.
+		 */
+		data.timeout_ns = 0;
+		data.timeout_clks = 64;
+	} else
+		mmc_set_data_timeout(&data, card);
+
+	mmc_wait_for_req(host, &mrq);
+
+	memcpy(buf, data_buf, len);
+	kfree(data_buf);
+
+	if (cmd.error)
+		return cmd.error;
+	if (data.error)
+		return data.error;
+
+	return 0;
+}
+
+int mmc_send_csd(struct mmc_card *card, u32 *csd)
+{
+	int ret, i;
+
+	if (!mmc_host_is_spi(card->host))
+		return mmc_send_cxd_native(card->host, card->rca << 16,
+				csd, MMC_SEND_CSD);
+
+	ret = mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd, 16);
+	if (ret)
+		return ret;
+
+	for (i = 0;i < 4;i++)
+		csd[i] = be32_to_cpu(csd[i]);
+
+	return 0;
+}
+
+int mmc_send_cid(struct mmc_host *host, u32 *cid)
+{
+	int ret, i;
+
+	if (!mmc_host_is_spi(host)) {
+		if (!host->card)
+			return -EINVAL;
+		return mmc_send_cxd_native(host, host->card->rca << 16,
+				cid, MMC_SEND_CID);
+	}
+
+	ret = mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid, 16);
+	if (ret)
+		return ret;
+
+	for (i = 0;i < 4;i++)
+		cid[i] = be32_to_cpu(cid[i]);
+
+	return 0;
+}
+
+int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd)
+{
+	return mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD,
+			ext_csd, 512);
+}
+
+int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp)
+{
+	struct mmc_command cmd = {0};
+	int err;
+
+	cmd.opcode = MMC_SPI_READ_OCR;
+	cmd.arg = highcap ? (1 << 30) : 0;
+	cmd.flags = MMC_RSP_SPI_R3;
+
+	err = mmc_wait_for_cmd(host, &cmd, 0);
+
+	*ocrp = cmd.resp[1];
+	return err;
+}
+
+int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
+{
+	struct mmc_command cmd = {0};
+	int err;
+
+	cmd.opcode = MMC_SPI_CRC_ON_OFF;
+	cmd.flags = MMC_RSP_SPI_R1;
+	cmd.arg = use_crc;
+
+	err = mmc_wait_for_cmd(host, &cmd, 0);
+	if (!err)
+		host->use_spi_crc = use_crc;
+	return err;
+}
+
+/**
+ *	mmc_switch - modify EXT_CSD register
+ *	@card: the MMC card associated with the data transfer
+ *	@set: cmd set values
+ *	@index: EXT_CSD register index
+ *	@value: value to program into EXT_CSD register
+ *	@timeout_ms: timeout (ms) for operation performed by register write,
+ *                   timeout of zero implies maximum possible timeout
+ *
+ *	Modifies the EXT_CSD register for selected card.
+ */
+int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
+	       unsigned int timeout_ms)
+{
+	int err;
+	struct mmc_command cmd = {0};
+	u32 status;
+
+	BUG_ON(!card);
+	BUG_ON(!card->host);
+
+	cmd.opcode = MMC_SWITCH;
+	cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
+		  (index << 16) |
+		  (value << 8) |
+		  set;
+	cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
+	cmd.cmd_timeout_ms = timeout_ms;
+
+	err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
+	if (err)
+		return err;
+
+	/* Must check status to be sure of no errors */
+	do {
+		err = mmc_send_status(card, &status);
+		if (err)
+			return err;
+		if (card->host->caps & MMC_CAP_WAIT_WHILE_BUSY)
+			break;
+		if (mmc_host_is_spi(card->host))
+			break;
+	} while (R1_CURRENT_STATE(status) == R1_STATE_PRG);
+
+	if (mmc_host_is_spi(card->host)) {
+		if (status & R1_SPI_ILLEGAL_COMMAND)
+			return -EBADMSG;
+	} else {
+		if (status & 0xFDFFA000)
+			pr_warning("%s: unexpected status %#x after "
+			       "switch", mmc_hostname(card->host), status);
+		if (status & R1_SWITCH_ERROR)
+			return -EBADMSG;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mmc_switch);
+
+int mmc_send_status(struct mmc_card *card, u32 *status)
+{
+	int err;
+	struct mmc_command cmd = {0};
+
+	BUG_ON(!card);
+	BUG_ON(!card->host);
+
+	cmd.opcode = MMC_SEND_STATUS;
+	if (!mmc_host_is_spi(card->host))
+		cmd.arg = card->rca << 16;
+	cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
+
+	err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
+	if (err)
+		return err;
+
+	/* NOTE: callers are required to understand the difference
+	 * between "native" and SPI format status words!
+	 */
+	if (status)
+		*status = cmd.resp[0];
+
+	return 0;
+}
+
+static int
+mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,
+		  u8 len)
+{
+	struct mmc_request mrq = {NULL};
+	struct mmc_command cmd = {0};
+	struct mmc_data data = {0};
+	struct scatterlist sg;
+	u8 *data_buf;
+	u8 *test_buf;
+	int i, err;
+	static u8 testdata_8bit[8] = { 0x55, 0xaa, 0, 0, 0, 0, 0, 0 };
+	static u8 testdata_4bit[4] = { 0x5a, 0, 0, 0 };
+
+	/* dma onto stack is unsafe/nonportable, but callers to this
+	 * routine normally provide temporary on-stack buffers ...
+	 */
+	data_buf = kmalloc(len, GFP_KERNEL);
+	if (!data_buf)
+		return -ENOMEM;
+
+	if (len == 8)
+		test_buf = testdata_8bit;
+	else if (len == 4)
+		test_buf = testdata_4bit;
+	else {
+		pr_err("%s: Invalid bus_width %d\n",
+		       mmc_hostname(host), len);
+		kfree(data_buf);
+		return -EINVAL;
+	}
+
+	if (opcode == MMC_BUS_TEST_W)
+		memcpy(data_buf, test_buf, len);
+
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+	cmd.opcode = opcode;
+	cmd.arg = 0;
+
+	/* NOTE HACK:  the MMC_RSP_SPI_R1 is always correct here, but we
+	 * rely on callers to never use this with "native" calls for reading
+	 * CSD or CID.  Native versions of those commands use the R2 type,
+	 * not R1 plus a data block.
+	 */
+	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
+
+	data.blksz = len;
+	data.blocks = 1;
+	if (opcode == MMC_BUS_TEST_R)
+		data.flags = MMC_DATA_READ;
+	else
+		data.flags = MMC_DATA_WRITE;
+
+	data.sg = &sg;
+	data.sg_len = 1;
+	sg_init_one(&sg, data_buf, len);
+	mmc_wait_for_req(host, &mrq);
+	err = 0;
+	if (opcode == MMC_BUS_TEST_R) {
+		for (i = 0; i < len / 4; i++)
+			if ((test_buf[i] ^ data_buf[i]) != 0xff) {
+				err = -EIO;
+				break;
+			}
+	}
+	kfree(data_buf);
+
+	if (cmd.error)
+		return cmd.error;
+	if (data.error)
+		return data.error;
+
+	return err;
+}
+
+int mmc_bus_test(struct mmc_card *card, u8 bus_width)
+{
+	int err, width;
+
+	if (bus_width == MMC_BUS_WIDTH_8)
+		width = 8;
+	else if (bus_width == MMC_BUS_WIDTH_4)
+		width = 4;
+	else if (bus_width == MMC_BUS_WIDTH_1)
+		return 0; /* no need for test */
+	else
+		return -EINVAL;
+
+	/*
+	 * Ignore errors from BUS_TEST_W.  BUS_TEST_R will fail if there
+	 * is a problem.  This improves chances that the test will work.
+	 */
+	mmc_send_bus_test(card, card->host, MMC_BUS_TEST_W, width);
+	err = mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width);
+	return err;
+}
+
+int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status)
+{
+	struct mmc_command cmd = {0};
+	unsigned int opcode;
+	int err;
+
+	if (!card->ext_csd.hpi) {
+		pr_warning("%s: Card didn't support HPI command\n",
+			   mmc_hostname(card->host));
+		return -EINVAL;
+	}
+
+	opcode = card->ext_csd.hpi_cmd;
+	if (opcode == MMC_STOP_TRANSMISSION)
+		cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
+	else if (opcode == MMC_SEND_STATUS)
+		cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+	cmd.opcode = opcode;
+	cmd.arg = card->rca << 16 | 1;
+	cmd.cmd_timeout_ms = card->ext_csd.out_of_int_time;
+
+	err = mmc_wait_for_cmd(card->host, &cmd, 0);
+	if (err) {
+		pr_warn("%s: error %d interrupting operation. "
+			"HPI command response %#x\n", mmc_hostname(card->host),
+			err, cmd.resp[0]);
+		return err;
+	}
+	if (status)
+		*status = cmd.resp[0];
+
+	return 0;
+}
diff --git a/ANDROID_3.4.5/drivers/mmc/core/mmc_ops.h b/ANDROID_3.4.5/drivers/mmc/core/mmc_ops.h
new file mode 100644
index 00000000..3dd8941c
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/mmc_ops.h
@@ -0,0 +1,32 @@
+/*
+ *  linux/drivers/mmc/core/mmc_ops.h
+ *
+ *  Copyright 2006-2007 Pierre Ossman
+ *
+ * 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.
+ */
+
+#ifndef _MMC_MMC_OPS_H
+#define _MMC_MMC_OPS_H
+
+int mmc_select_card(struct mmc_card *card);
+int mmc_deselect_cards(struct mmc_host *host);
+int mmc_go_idle(struct mmc_host *host);
+int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr);
+int mmc_all_send_cid(struct mmc_host *host, u32 *cid);
+int mmc_set_relative_addr(struct mmc_card *card);
+int mmc_send_csd(struct mmc_card *card, u32 *csd);
+int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd);
+int mmc_send_status(struct mmc_card *card, u32 *status);
+int mmc_send_cid(struct mmc_host *host, u32 *cid);
+int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp);
+int mmc_spi_set_crc(struct mmc_host *host, int use_crc);
+int mmc_card_sleepawake(struct mmc_host *host, int sleep);
+int mmc_bus_test(struct mmc_card *card, u8 bus_width);
+int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status);
+
+#endif
+
diff --git a/ANDROID_3.4.5/drivers/mmc/core/quirks.c b/ANDROID_3.4.5/drivers/mmc/core/quirks.c
new file mode 100644
index 00000000..06ee1aea
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/quirks.c
@@ -0,0 +1,91 @@
+/*
+ *  This file contains work-arounds for many known SD/MMC
+ *  and SDIO hardware bugs.
+ *
+ *  Copyright (c) 2011 Andrei Warkentin <andreiw@motorola.com>
+ *  Copyright (c) 2011 Pierre Tardy <tardyp@gmail.com>
+ *  Inspired from pci fixup code:
+ *  Copyright (c) 1999 Martin Mares <mj@ucw.cz>
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/mmc/card.h>
+
+#ifndef SDIO_VENDOR_ID_TI
+#define SDIO_VENDOR_ID_TI		0x0097
+#endif
+
+#ifndef SDIO_DEVICE_ID_TI_WL1271
+#define SDIO_DEVICE_ID_TI_WL1271	0x4076
+#endif
+
+#ifndef SDIO_VENDOR_ID_STE
+#define SDIO_VENDOR_ID_STE		0x0020
+#endif
+
+#ifndef SDIO_DEVICE_ID_STE_CW1200
+#define SDIO_DEVICE_ID_STE_CW1200	0x2280
+#endif
+
+/*
+ * This hook just adds a quirk for all sdio devices
+ */
+static void add_quirk_for_sdio_devices(struct mmc_card *card, int data)
+{
+	if (mmc_card_sdio(card))
+		card->quirks |= data;
+}
+
+static const struct mmc_fixup mmc_fixup_methods[] = {
+	/* by default sdio devices are considered CLK_GATING broken */
+	/* good cards will be whitelisted as they are tested */
+	SDIO_FIXUP(SDIO_ANY_ID, SDIO_ANY_ID,
+		   add_quirk_for_sdio_devices,
+		   MMC_QUIRK_BROKEN_CLK_GATING),
+
+	SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
+		   remove_quirk, MMC_QUIRK_BROKEN_CLK_GATING),
+
+	SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
+		   add_quirk, MMC_QUIRK_NONSTD_FUNC_IF),
+
+	SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
+		   add_quirk, MMC_QUIRK_DISABLE_CD),
+
+	SDIO_FIXUP(SDIO_VENDOR_ID_STE, SDIO_DEVICE_ID_STE_CW1200,
+		   add_quirk, MMC_QUIRK_BROKEN_BYTE_MODE_512),
+
+	END_FIXUP
+};
+
+void mmc_fixup_device(struct mmc_card *card, const struct mmc_fixup *table)
+{
+	const struct mmc_fixup *f;
+	u64 rev = cid_rev_card(card);
+
+	/* Non-core specific workarounds. */
+	if (!table)
+		table = mmc_fixup_methods;
+
+	for (f = table; f->vendor_fixup; f++) {
+		if ((f->manfid == CID_MANFID_ANY ||
+		     f->manfid == card->cid.manfid) &&
+		    (f->oemid == CID_OEMID_ANY ||
+		     f->oemid == card->cid.oemid) &&
+		    (f->name == CID_NAME_ANY ||
+		     !strncmp(f->name, card->cid.prod_name,
+			      sizeof(card->cid.prod_name))) &&
+		    (f->cis_vendor == card->cis.vendor ||
+		     f->cis_vendor == (u16) SDIO_ANY_ID) &&
+		    (f->cis_device == card->cis.device ||
+		     f->cis_device == (u16) SDIO_ANY_ID) &&
+		    rev >= f->rev_start && rev <= f->rev_end) {
+			dev_dbg(&card->dev, "calling %pF\n", f->vendor_fixup);
+			f->vendor_fixup(card, f->data);
+		}
+	}
+}
+EXPORT_SYMBOL(mmc_fixup_device);
diff --git a/ANDROID_3.4.5/drivers/mmc/core/sd.c b/ANDROID_3.4.5/drivers/mmc/core/sd.c
new file mode 100644
index 00000000..7c76a455
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/sd.c
@@ -0,0 +1,1325 @@
+/*
+ *  linux/drivers/mmc/core/sd.c
+ *
+ *  Copyright (C) 2003-2004 Russell King, All Rights Reserved.
+ *  SD support Copyright (C) 2004 Ian Molton, All Rights Reserved.
+ *  Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
+ *
+ * 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/err.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sd.h>
+
+#include "core.h"
+#include "bus.h"
+#include "mmc_ops.h"
+#include "sd.h"
+#include "sd_ops.h"
+
+static const unsigned int tran_exp[] = {
+	10000,		100000,		1000000,	10000000,
+	0,		0,		0,		0
+};
+
+static const unsigned char tran_mant[] = {
+	0,	10,	12,	13,	15,	20,	25,	30,
+	35,	40,	45,	50,	55,	60,	70,	80,
+};
+
+static const unsigned int tacc_exp[] = {
+	1,	10,	100,	1000,	10000,	100000,	1000000, 10000000,
+};
+
+static const unsigned int tacc_mant[] = {
+	0,	10,	12,	13,	15,	20,	25,	30,
+	35,	40,	45,	50,	55,	60,	70,	80,
+};
+
+#define UNSTUFF_BITS(resp,start,size)					\
+	({								\
+		const int __size = size;				\
+		const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1;	\
+		const int __off = 3 - ((start) / 32);			\
+		const int __shft = (start) & 31;			\
+		u32 __res;						\
+									\
+		__res = resp[__off] >> __shft;				\
+		if (__size + __shft > 32)				\
+			__res |= resp[__off-1] << ((32 - __shft) % 32);	\
+		__res & __mask;						\
+	})
+
+/*
+ * Given the decoded CSD structure, decode the raw CID to our CID structure.
+ */
+void mmc_decode_cid(struct mmc_card *card)
+{
+	u32 *resp = card->raw_cid;
+
+	memset(&card->cid, 0, sizeof(struct mmc_cid));
+
+	/*
+	 * SD doesn't currently have a version field so we will
+	 * have to assume we can parse this.
+	 */
+	card->cid.manfid		= UNSTUFF_BITS(resp, 120, 8);
+	card->cid.oemid			= UNSTUFF_BITS(resp, 104, 16);
+	card->cid.prod_name[0]		= UNSTUFF_BITS(resp, 96, 8);
+	card->cid.prod_name[1]		= UNSTUFF_BITS(resp, 88, 8);
+	card->cid.prod_name[2]		= UNSTUFF_BITS(resp, 80, 8);
+	card->cid.prod_name[3]		= UNSTUFF_BITS(resp, 72, 8);
+	card->cid.prod_name[4]		= UNSTUFF_BITS(resp, 64, 8);
+	card->cid.hwrev			= UNSTUFF_BITS(resp, 60, 4);
+	card->cid.fwrev			= UNSTUFF_BITS(resp, 56, 4);
+	card->cid.serial		= UNSTUFF_BITS(resp, 24, 32);
+	card->cid.year			= UNSTUFF_BITS(resp, 12, 8);
+	card->cid.month			= UNSTUFF_BITS(resp, 8, 4);
+
+	card->cid.year += 2000; /* SD cards year offset */
+}
+
+/*
+ * Given a 128-bit response, decode to our card CSD structure.
+ */
+static int mmc_decode_csd(struct mmc_card *card)
+{
+	struct mmc_csd *csd = &card->csd;
+	unsigned int e, m, csd_struct;
+	u32 *resp = card->raw_csd;
+
+	csd_struct = UNSTUFF_BITS(resp, 126, 2);
+
+	switch (csd_struct) {
+	case 0:
+		m = UNSTUFF_BITS(resp, 115, 4);
+		e = UNSTUFF_BITS(resp, 112, 3);
+		csd->tacc_ns	 = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
+		csd->tacc_clks	 = UNSTUFF_BITS(resp, 104, 8) * 100;
+
+		m = UNSTUFF_BITS(resp, 99, 4);
+		e = UNSTUFF_BITS(resp, 96, 3);
+		csd->max_dtr	  = tran_exp[e] * tran_mant[m];
+		csd->cmdclass	  = UNSTUFF_BITS(resp, 84, 12);
+
+		e = UNSTUFF_BITS(resp, 47, 3);
+		m = UNSTUFF_BITS(resp, 62, 12);
+		csd->capacity	  = (1 + m) << (e + 2);
+
+		csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
+		csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
+		csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
+		csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
+		csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
+		csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
+		csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
+
+		if (UNSTUFF_BITS(resp, 46, 1)) {
+			csd->erase_size = 1;
+		} else if (csd->write_blkbits >= 9) {
+			csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1;
+			csd->erase_size <<= csd->write_blkbits - 9;
+		}
+		break;
+	case 1:
+		/*
+		 * This is a block-addressed SDHC or SDXC card. Most
+		 * interesting fields are unused and have fixed
+		 * values. To avoid getting tripped by buggy cards,
+		 * we assume those fixed values ourselves.
+		 */
+		mmc_card_set_blockaddr(card);
+
+		csd->tacc_ns	 = 0; /* Unused */
+		csd->tacc_clks	 = 0; /* Unused */
+
+		m = UNSTUFF_BITS(resp, 99, 4);
+		e = UNSTUFF_BITS(resp, 96, 3);
+		csd->max_dtr	  = tran_exp[e] * tran_mant[m];
+		csd->cmdclass	  = UNSTUFF_BITS(resp, 84, 12);
+		csd->c_size	  = UNSTUFF_BITS(resp, 48, 22);
+
+		/* SDXC cards have a minimum C_SIZE of 0x00FFFF */
+		if (csd->c_size >= 0xFFFF)
+			mmc_card_set_ext_capacity(card);
+
+		m = UNSTUFF_BITS(resp, 48, 22);
+		csd->capacity     = (1 + m) << 10;
+
+		csd->read_blkbits = 9;
+		csd->read_partial = 0;
+		csd->write_misalign = 0;
+		csd->read_misalign = 0;
+		csd->r2w_factor = 4; /* Unused */
+		csd->write_blkbits = 9;
+		csd->write_partial = 0;
+		csd->erase_size = 1;
+		break;
+	default:
+		pr_err("%s: unrecognised CSD structure version %d\n",
+			mmc_hostname(card->host), csd_struct);
+		return -EINVAL;
+	}
+
+	card->erase_size = csd->erase_size;
+
+	return 0;
+}
+
+/*
+ * Given a 64-bit response, decode to our card SCR structure.
+ */
+static int mmc_decode_scr(struct mmc_card *card)
+{
+	struct sd_scr *scr = &card->scr;
+	unsigned int scr_struct;
+	u32 resp[4];
+
+	resp[3] = card->raw_scr[1];
+	resp[2] = card->raw_scr[0];
+
+	scr_struct = UNSTUFF_BITS(resp, 60, 4);
+	if (scr_struct != 0) {
+		pr_err("%s: unrecognised SCR structure version %d\n",
+			mmc_hostname(card->host), scr_struct);
+		return -EINVAL;
+	}
+
+	scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
+	scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
+	if (scr->sda_vsn == SCR_SPEC_VER_2)
+		/* Check if Physical Layer Spec v3.0 is supported */
+		scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1);
+
+	if (UNSTUFF_BITS(resp, 55, 1))
+		card->erased_byte = 0xFF;
+	else
+		card->erased_byte = 0x0;
+
+	if (scr->sda_spec3)
+		scr->cmds = UNSTUFF_BITS(resp, 32, 2);
+	return 0;
+}
+
+/*
+ * Fetch and process SD Status register.
+ */
+static int mmc_read_ssr(struct mmc_card *card)
+{
+	unsigned int au, es, et, eo;
+	int err, i;
+	u32 *ssr;
+
+	if (!(card->csd.cmdclass & CCC_APP_SPEC)) {
+		pr_warning("%s: card lacks mandatory SD Status "
+			"function.\n", mmc_hostname(card->host));
+		return 0;
+	}
+
+	ssr = kmalloc(64, GFP_KERNEL);
+	if (!ssr)
+		return -ENOMEM;
+
+	err = mmc_app_sd_status(card, ssr);
+	if (err) {
+		pr_warning("%s: problem reading SD Status "
+			"register.\n", mmc_hostname(card->host));
+		err = 0;
+		goto out;
+	}
+
+	for (i = 0; i < 16; i++)
+		ssr[i] = be32_to_cpu(ssr[i]);
+
+	/*
+	 * UNSTUFF_BITS only works with four u32s so we have to offset the
+	 * bitfield positions accordingly.
+	 */
+	au = UNSTUFF_BITS(ssr, 428 - 384, 4);
+	if (au > 0 || au <= 9) {
+		card->ssr.au = 1 << (au + 4);
+		es = UNSTUFF_BITS(ssr, 408 - 384, 16);
+		et = UNSTUFF_BITS(ssr, 402 - 384, 6);
+		eo = UNSTUFF_BITS(ssr, 400 - 384, 2);
+		if (es && et) {
+			card->ssr.erase_timeout = (et * 1000) / es;
+			card->ssr.erase_offset = eo * 1000;
+		}
+	} else {
+		pr_warning("%s: SD Status: Invalid Allocation Unit "
+			"size.\n", mmc_hostname(card->host));
+	}
+out:
+	kfree(ssr);
+	return err;
+}
+
+/*
+ * Fetches and decodes switch information
+ */
+static int mmc_read_switch(struct mmc_card *card)
+{
+	int err;
+	u8 *status;
+
+	if (card->scr.sda_vsn < SCR_SPEC_VER_1)
+		return 0;
+
+	if (!(card->csd.cmdclass & CCC_SWITCH)) {
+		pr_warning("%s: card lacks mandatory switch "
+			"function, performance might suffer.\n",
+			mmc_hostname(card->host));
+		return 0;
+	}
+
+	err = -EIO;
+
+	status = kmalloc(64, GFP_KERNEL);
+	if (!status) {
+		pr_err("%s: could not allocate a buffer for "
+			"switch capabilities.\n",
+			mmc_hostname(card->host));
+		return -ENOMEM;
+	}
+
+	/* Find out the supported Bus Speed Modes. */
+	err = mmc_sd_switch(card, 0, 0, 1, status);
+	if (err) {
+		/*
+		 * If the host or the card can't do the switch,
+		 * fail more gracefully.
+		 */
+		if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
+			goto out;
+
+		pr_warning("%s: problem reading Bus Speed modes.\n",
+			mmc_hostname(card->host));
+		err = 0;
+
+		goto out;
+	}
+
+	if (status[13] & SD_MODE_HIGH_SPEED)
+		card->sw_caps.hs_max_dtr = HIGH_SPEED_MAX_DTR;
+
+	if (card->scr.sda_spec3) {
+		card->sw_caps.sd3_bus_mode = status[13];
+
+		/* Find out Driver Strengths supported by the card */
+		err = mmc_sd_switch(card, 0, 2, 1, status);
+		if (err) {
+			/*
+			 * If the host or the card can't do the switch,
+			 * fail more gracefully.
+			 */
+			if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
+				goto out;
+
+			pr_warning("%s: problem reading "
+				"Driver Strength.\n",
+				mmc_hostname(card->host));
+			err = 0;
+
+			goto out;
+		}
+
+		card->sw_caps.sd3_drv_type = status[9];
+
+		/* Find out Current Limits supported by the card */
+		err = mmc_sd_switch(card, 0, 3, 1, status);
+		if (err) {
+			/*
+			 * If the host or the card can't do the switch,
+			 * fail more gracefully.
+			 */
+			if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
+				goto out;
+
+			pr_warning("%s: problem reading "
+				"Current Limit.\n",
+				mmc_hostname(card->host));
+			err = 0;
+
+			goto out;
+		}
+
+		card->sw_caps.sd3_curr_limit = status[7];
+	}
+
+out:
+	kfree(status);
+
+	return err;
+}
+
+/*
+ * Test if the card supports high-speed mode and, if so, switch to it.
+ */
+int mmc_sd_switch_hs(struct mmc_card *card)
+{
+	int err;
+	u8 *status;
+
+	if (card->scr.sda_vsn < SCR_SPEC_VER_1)
+		return 0;
+
+	if (!(card->csd.cmdclass & CCC_SWITCH))
+		return 0;
+
+	if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
+		return 0;
+
+	if (card->sw_caps.hs_max_dtr == 0)
+		return 0;
+
+	err = -EIO;
+
+	status = kmalloc(64, GFP_KERNEL);
+	if (!status) {
+		pr_err("%s: could not allocate a buffer for "
+			"switch capabilities.\n", mmc_hostname(card->host));
+		return -ENOMEM;
+	}
+
+	err = mmc_sd_switch(card, 1, 0, 1, status);
+	if (err)
+		goto out;
+
+	if ((status[16] & 0xF) != 1) {
+		pr_warning("%s: Problem switching card "
+			"into high-speed mode!\n",
+			mmc_hostname(card->host));
+		err = 0;
+	} else {
+		err = 1;
+	}
+
+out:
+	kfree(status);
+
+	return err;
+}
+
+static int sd_select_driver_type(struct mmc_card *card, u8 *status)
+{
+	int host_drv_type = SD_DRIVER_TYPE_B;
+	int card_drv_type = SD_DRIVER_TYPE_B;
+	int drive_strength;
+	int err;
+
+	/*
+	 * If the host doesn't support any of the Driver Types A,C or D,
+	 * or there is no board specific handler then default Driver
+	 * Type B is used.
+	 */
+	if (!(card->host->caps & (MMC_CAP_DRIVER_TYPE_A | MMC_CAP_DRIVER_TYPE_C
+	    | MMC_CAP_DRIVER_TYPE_D)))
+		return 0;
+
+	if (!card->host->ops->select_drive_strength)
+		return 0;
+
+	if (card->host->caps & MMC_CAP_DRIVER_TYPE_A)
+		host_drv_type |= SD_DRIVER_TYPE_A;
+
+	if (card->host->caps & MMC_CAP_DRIVER_TYPE_C)
+		host_drv_type |= SD_DRIVER_TYPE_C;
+
+	if (card->host->caps & MMC_CAP_DRIVER_TYPE_D)
+		host_drv_type |= SD_DRIVER_TYPE_D;
+
+	if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A)
+		card_drv_type |= SD_DRIVER_TYPE_A;
+
+	if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C)
+		card_drv_type |= SD_DRIVER_TYPE_C;
+
+	if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_D)
+		card_drv_type |= SD_DRIVER_TYPE_D;
+
+	/*
+	 * The drive strength that the hardware can support
+	 * depends on the board design.  Pass the appropriate
+	 * information and let the hardware specific code
+	 * return what is possible given the options
+	 */
+	mmc_host_clk_hold(card->host);
+	drive_strength = card->host->ops->select_drive_strength(
+		card->sw_caps.uhs_max_dtr,
+		host_drv_type, card_drv_type);
+	mmc_host_clk_release(card->host);
+
+	err = mmc_sd_switch(card, 1, 2, drive_strength, status);
+	if (err)
+		return err;
+
+	if ((status[15] & 0xF) != drive_strength) {
+		pr_warning("%s: Problem setting drive strength!\n",
+			mmc_hostname(card->host));
+		return 0;
+	}
+
+	mmc_set_driver_type(card->host, drive_strength);
+
+	return 0;
+}
+
+static void sd_update_bus_speed_mode(struct mmc_card *card)
+{
+	/*
+	 * If the host doesn't support any of the UHS-I modes, fallback on
+	 * default speed.
+	 */
+	if (!(card->host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
+	    MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50))) {
+		card->sd_bus_speed = 0;
+		return;
+	}
+
+	if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
+	    (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
+			card->sd_bus_speed = UHS_SDR104_BUS_SPEED;
+	} else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
+		   (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
+			card->sd_bus_speed = UHS_DDR50_BUS_SPEED;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		    MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
+		    SD_MODE_UHS_SDR50)) {
+			card->sd_bus_speed = UHS_SDR50_BUS_SPEED;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		    MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
+		   (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
+			card->sd_bus_speed = UHS_SDR25_BUS_SPEED;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		    MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
+		    MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
+		    SD_MODE_UHS_SDR12)) {
+			card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
+	}
+}
+
+static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status)
+{
+	int err;
+	unsigned int timing = 0;
+
+	switch (card->sd_bus_speed) {
+	case UHS_SDR104_BUS_SPEED:
+		timing = MMC_TIMING_UHS_SDR104;
+		card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
+		break;
+	case UHS_DDR50_BUS_SPEED:
+		timing = MMC_TIMING_UHS_DDR50;
+		card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
+		break;
+	case UHS_SDR50_BUS_SPEED:
+		timing = MMC_TIMING_UHS_SDR50;
+		card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
+		break;
+	case UHS_SDR25_BUS_SPEED:
+		timing = MMC_TIMING_UHS_SDR25;
+		card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
+		break;
+	case UHS_SDR12_BUS_SPEED:
+		timing = MMC_TIMING_UHS_SDR12;
+		card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
+		break;
+	default:
+		return 0;
+	}
+
+	err = mmc_sd_switch(card, 1, 0, card->sd_bus_speed, status);
+	if (err)
+		return err;
+
+	if ((status[16] & 0xF) != card->sd_bus_speed)
+		pr_warning("%s: Problem setting bus speed mode!\n",
+			mmc_hostname(card->host));
+	else {
+		mmc_set_timing(card->host, timing);
+		mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
+	}
+
+	return 0;
+}
+
+static int sd_set_current_limit(struct mmc_card *card, u8 *status)
+{
+	int current_limit = 0;
+	int err;
+
+	/*
+	 * Current limit switch is only defined for SDR50, SDR104, and DDR50
+	 * bus speed modes. For other bus speed modes, we set the default
+	 * current limit of 200mA.
+	 */
+	if ((card->sd_bus_speed == UHS_SDR50_BUS_SPEED) ||
+	    (card->sd_bus_speed == UHS_SDR104_BUS_SPEED) ||
+	    (card->sd_bus_speed == UHS_DDR50_BUS_SPEED)) {
+		if (card->host->caps & MMC_CAP_MAX_CURRENT_800) {
+			if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800)
+				current_limit = SD_SET_CURRENT_LIMIT_800;
+			else if (card->sw_caps.sd3_curr_limit &
+					SD_MAX_CURRENT_600)
+				current_limit = SD_SET_CURRENT_LIMIT_600;
+			else if (card->sw_caps.sd3_curr_limit &
+					SD_MAX_CURRENT_400)
+				current_limit = SD_SET_CURRENT_LIMIT_400;
+			else if (card->sw_caps.sd3_curr_limit &
+					SD_MAX_CURRENT_200)
+				current_limit = SD_SET_CURRENT_LIMIT_200;
+		} else if (card->host->caps & MMC_CAP_MAX_CURRENT_600) {
+			if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600)
+				current_limit = SD_SET_CURRENT_LIMIT_600;
+			else if (card->sw_caps.sd3_curr_limit &
+					SD_MAX_CURRENT_400)
+				current_limit = SD_SET_CURRENT_LIMIT_400;
+			else if (card->sw_caps.sd3_curr_limit &
+					SD_MAX_CURRENT_200)
+				current_limit = SD_SET_CURRENT_LIMIT_200;
+		} else if (card->host->caps & MMC_CAP_MAX_CURRENT_400) {
+			if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400)
+				current_limit = SD_SET_CURRENT_LIMIT_400;
+			else if (card->sw_caps.sd3_curr_limit &
+					SD_MAX_CURRENT_200)
+				current_limit = SD_SET_CURRENT_LIMIT_200;
+		} else if (card->host->caps & MMC_CAP_MAX_CURRENT_200) {
+			if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200)
+				current_limit = SD_SET_CURRENT_LIMIT_200;
+		}
+	} else
+		current_limit = SD_SET_CURRENT_LIMIT_200;
+
+	err = mmc_sd_switch(card, 1, 3, current_limit, status);
+	if (err)
+		return err;
+
+	if (((status[15] >> 4) & 0x0F) != current_limit)
+		pr_warning("%s: Problem setting current limit!\n",
+			mmc_hostname(card->host));
+
+	return 0;
+}
+
+/*
+ * UHS-I specific initialization procedure
+ */
+static int mmc_sd_init_uhs_card(struct mmc_card *card)
+{
+	int err;
+	u8 *status;
+
+	if (!card->scr.sda_spec3)
+		return 0;
+
+	if (!(card->csd.cmdclass & CCC_SWITCH))
+		return 0;
+
+	status = kmalloc(64, GFP_KERNEL);
+	if (!status) {
+		pr_err("%s: could not allocate a buffer for "
+			"switch capabilities.\n", mmc_hostname(card->host));
+		return -ENOMEM;
+	}
+
+	/* Set 4-bit bus width */
+	if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
+	    (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
+		err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
+		if (err)
+			goto out;
+
+		mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
+	}
+
+	/*
+	 * Select the bus speed mode depending on host
+	 * and card capability.
+	 */
+	sd_update_bus_speed_mode(card);
+
+	/* Set the driver strength for the card */
+	err = sd_select_driver_type(card, status);
+	if (err)
+		goto out;
+
+	/* Set current limit for the card */
+	err = sd_set_current_limit(card, status);
+	if (err)
+		goto out;
+
+	/* Set bus speed mode of the card */
+	err = sd_set_bus_speed_mode(card, status);
+	if (err)
+		goto out;
+
+	/* SPI mode doesn't define CMD19 */
+	if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning) {
+		mmc_host_clk_hold(card->host);
+		err = card->host->ops->execute_tuning(card->host,
+						      MMC_SEND_TUNING_BLOCK);
+		mmc_host_clk_release(card->host);
+	}
+
+out:
+	kfree(status);
+
+	return err;
+}
+
+MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
+	card->raw_cid[2], card->raw_cid[3]);
+MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
+	card->raw_csd[2], card->raw_csd[3]);
+MMC_DEV_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
+MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
+MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);
+MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);
+MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
+MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
+MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
+MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
+MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
+MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
+
+
+static struct attribute *sd_std_attrs[] = {
+	&dev_attr_cid.attr,
+	&dev_attr_csd.attr,
+	&dev_attr_scr.attr,
+	&dev_attr_date.attr,
+	&dev_attr_erase_size.attr,
+	&dev_attr_preferred_erase_size.attr,
+	&dev_attr_fwrev.attr,
+	&dev_attr_hwrev.attr,
+	&dev_attr_manfid.attr,
+	&dev_attr_name.attr,
+	&dev_attr_oemid.attr,
+	&dev_attr_serial.attr,
+	NULL,
+};
+
+static struct attribute_group sd_std_attr_group = {
+	.attrs = sd_std_attrs,
+};
+
+static const struct attribute_group *sd_attr_groups[] = {
+	&sd_std_attr_group,
+	NULL,
+};
+
+struct device_type sd_type = {
+	.groups = sd_attr_groups,
+};
+
+/*
+ * Fetch CID from card.
+ */
+int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
+{
+	int err;
+
+	/*
+	 * Since we're changing the OCR value, we seem to
+	 * need to tell some cards to go back to the idle
+	 * state.  We wait 1ms to give cards time to
+	 * respond.
+	 */
+	mmc_go_idle(host);
+
+	/*
+	 * If SD_SEND_IF_COND indicates an SD 2.0
+	 * compliant card and we should set bit 30
+	 * of the ocr to indicate that we can handle
+	 * block-addressed SDHC cards.
+	 */
+	err = mmc_send_if_cond(host, ocr);
+	if (!err)
+		ocr |= SD_OCR_CCS;
+
+	/*
+	 * If the host supports one of UHS-I modes, request the card
+	 * to switch to 1.8V signaling level.
+	 */
+	if (host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
+	    MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50))
+		ocr |= SD_OCR_S18R;
+
+	/* If the host can supply more than 150mA, XPC should be set to 1. */
+	if (host->caps & (MMC_CAP_SET_XPC_330 | MMC_CAP_SET_XPC_300 |
+	    MMC_CAP_SET_XPC_180))
+		ocr |= SD_OCR_XPC;
+
+try_again:
+	err = mmc_send_app_op_cond(host, ocr, rocr);
+	if (err)
+		return err;
+
+	/*
+	 * In case CCS and S18A in the response is set, start Signal Voltage
+	 * Switch procedure. SPI mode doesn't support CMD11.
+	 */
+	if (!mmc_host_is_spi(host) && rocr &&
+	   ((*rocr & 0x41000000) == 0x41000000)) {
+		err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, true);
+		if (err) {
+			ocr &= ~SD_OCR_S18R;
+			goto try_again;
+		}
+	}
+
+	if (mmc_host_is_spi(host))
+		err = mmc_send_cid(host, cid);
+	else
+		err = mmc_all_send_cid(host, cid);
+
+	return err;
+}
+
+int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card)
+{
+	int err;
+
+	/*
+	 * Fetch CSD from card.
+	 */
+	err = mmc_send_csd(card, card->raw_csd);
+	if (err)
+		return err;
+
+	err = mmc_decode_csd(card);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
+	bool reinit)
+{
+	int err;
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+	int retries;
+#endif
+
+	if (!reinit) {
+		/*
+		 * Fetch SCR from card.
+		 */
+		err = mmc_app_send_scr(card, card->raw_scr);
+		if (err)
+			return err;
+
+		err = mmc_decode_scr(card);
+		if (err)
+			return err;
+
+		/*
+		 * Fetch and process SD Status register.
+		 */
+		err = mmc_read_ssr(card);
+		if (err)
+			return err;
+
+		/* Erase init depends on CSD and SSR */
+		mmc_init_erase(card);
+
+		/*
+		 * Fetch switch information from card.
+		 */
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+		for (retries = 1; retries <= 3; retries++) {
+			err = mmc_read_switch(card);
+			if (!err) {
+				if (retries > 1) {
+					printk(KERN_WARNING
+					       "%s: recovered\n", 
+					       mmc_hostname(host));
+				}
+				break;
+			} else {
+				printk(KERN_WARNING
+				       "%s: read switch failed (attempt %d)\n",
+				       mmc_hostname(host), retries);
+			}
+		}
+#else
+		err = mmc_read_switch(card);
+#endif
+
+		if (err)
+			return err;
+	}
+
+	/*
+	 * For SPI, enable CRC as appropriate.
+	 * This CRC enable is located AFTER the reading of the
+	 * card registers because some SDHC cards are not able
+	 * to provide valid CRCs for non-512-byte blocks.
+	 */
+	if (mmc_host_is_spi(host)) {
+		err = mmc_spi_set_crc(host, use_spi_crc);
+		if (err)
+			return err;
+	}
+
+	/*
+	 * Check if read-only switch is active.
+	 */
+	if (!reinit) {
+		int ro = -1;
+
+		if (host->ops->get_ro) {
+			mmc_host_clk_hold(card->host);
+			ro = host->ops->get_ro(host);
+			mmc_host_clk_release(card->host);
+		}
+
+		if (ro < 0) {
+			pr_warning("%s: host does not "
+				"support reading read-only "
+				"switch. assuming write-enable.\n",
+				mmc_hostname(host));
+		} else if (ro > 0) {
+			mmc_card_set_readonly(card);
+		}
+	}
+
+	return 0;
+}
+
+unsigned mmc_sd_get_max_clock(struct mmc_card *card)
+{
+	unsigned max_dtr = (unsigned int)-1;
+
+	if (mmc_card_highspeed(card)) {
+		if (max_dtr > card->sw_caps.hs_max_dtr)
+			max_dtr = card->sw_caps.hs_max_dtr;
+	} else if (max_dtr > card->csd.max_dtr) {
+		max_dtr = card->csd.max_dtr;
+	}
+
+	return max_dtr;
+}
+
+void mmc_sd_go_highspeed(struct mmc_card *card)
+{
+	mmc_card_set_highspeed(card);
+	mmc_set_timing(card->host, MMC_TIMING_SD_HS);
+}
+
+/*
+ * Handle the detection and initialisation of a card.
+ *
+ * In the case of a resume, "oldcard" will contain the card
+ * we're trying to reinitialise.
+ */
+static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
+	struct mmc_card *oldcard)
+{
+	struct mmc_card *card;
+	int err;
+	u32 cid[4];
+	u32 rocr = 0;
+
+	BUG_ON(!host);
+	WARN_ON(!host->claimed);
+
+	/* The initialization should be done at 3.3 V I/O voltage. */
+	mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
+
+	err = mmc_sd_get_cid(host, ocr, cid, &rocr);
+	if (err)
+		return err;
+
+	if (oldcard) {
+		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0)
+			return -ENOENT;
+
+		card = oldcard;
+	} else {
+		/*
+		 * Allocate card structure.
+		 */
+		card = mmc_alloc_card(host, &sd_type);
+		if (IS_ERR(card))
+			return PTR_ERR(card);
+
+		card->type = MMC_TYPE_SD;
+		memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
+	}
+
+	/*
+	 * For native busses:  get card RCA and quit open drain mode.
+	 */
+	if (!mmc_host_is_spi(host)) {
+		err = mmc_send_relative_addr(host, &card->rca);
+		if (err)
+			return err;
+	}
+
+	if (!oldcard) {
+		err = mmc_sd_get_csd(host, card);
+		if (err)
+			return err;
+
+		mmc_decode_cid(card);
+	}
+
+	/*
+	 * Select card, as all following commands rely on that.
+	 */
+	if (!mmc_host_is_spi(host)) {
+		err = mmc_select_card(card);
+		if (err)
+			return err;
+	}
+
+	err = mmc_sd_setup_card(host, card, oldcard != NULL);
+	if (err)
+		goto free_card;
+
+	/* Initialization sequence for UHS-I cards */
+	if (rocr & SD_ROCR_S18A) {
+		err = mmc_sd_init_uhs_card(card);
+		if (err)
+			goto free_card;
+
+		/* Card is an ultra-high-speed card */
+		mmc_card_set_uhs(card);
+
+		/*
+		 * Since initialization is now complete, enable preset
+		 * value registers for UHS-I cards.
+		 */
+		if (host->ops->enable_preset_value) {
+			mmc_host_clk_hold(card->host);
+			host->ops->enable_preset_value(host, true);
+			mmc_host_clk_release(card->host);
+		}
+	} else {
+		/*
+		 * Attempt to change to high-speed (if supported)
+		 */
+		err = mmc_sd_switch_hs(card);
+		if (err > 0)
+			mmc_sd_go_highspeed(card);
+		else if (err)
+			goto free_card;
+
+		/*
+		 * Set bus speed.
+		 */
+		mmc_set_clock(host, mmc_sd_get_max_clock(card));
+
+		/*
+		 * Switch to wider bus (if supported).
+		 */
+		if ((host->caps & MMC_CAP_4_BIT_DATA) &&
+			(card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
+			err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
+			if (err)
+				goto free_card;
+
+			mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
+		}
+	}
+
+	host->card = card;
+	return 0;
+
+free_card:
+	if (!oldcard)
+		mmc_remove_card(card);
+
+	return err;
+}
+
+/*
+ * Host is being removed. Free up the current card.
+ */
+static void mmc_sd_remove(struct mmc_host *host)
+{
+	BUG_ON(!host);
+	BUG_ON(!host->card);
+
+	mmc_remove_card(host->card);
+	host->card = NULL;
+}
+
+/*
+ * Card detection - card is alive.
+ */
+static int mmc_sd_alive(struct mmc_host *host)
+{
+	return mmc_send_status(host->card, NULL);
+}
+
+/*
+ * Card detection callback from host.
+ */
+static void mmc_sd_detect(struct mmc_host *host)
+{
+	int err = 0;
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+        int retries = 5;
+#endif
+
+	BUG_ON(!host);
+	BUG_ON(!host->card);
+       
+	mmc_claim_host(host);
+
+	/*
+	 * Just check if our card has been removed.
+	 */
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+	while(retries) {
+		err = mmc_send_status(host->card, NULL);
+		if (err) {
+			retries--;
+			udelay(5);
+			continue;
+		}
+		break;
+	}
+	if (!retries) {
+		printk(KERN_ERR "%s(%s): Unable to re-detect card (%d)\n",
+		       __func__, mmc_hostname(host), err);
+	}
+#else
+	err = _mmc_detect_card_removed(host);
+#endif
+	mmc_release_host(host);
+
+	if (err) {
+		mmc_sd_remove(host);
+
+		mmc_claim_host(host);
+		mmc_detach_bus(host);
+		mmc_power_off(host);
+		mmc_release_host(host);
+	}
+}
+
+/*
+ * Suspend callback from host.
+ */
+static int mmc_sd_suspend(struct mmc_host *host)
+{
+	BUG_ON(!host);
+	BUG_ON(!host->card);
+
+	mmc_claim_host(host);
+	if (!mmc_host_is_spi(host))
+		mmc_deselect_cards(host);
+	host->card->state &= ~MMC_STATE_HIGHSPEED;
+	mmc_release_host(host);
+
+	return 0;
+}
+
+/*
+ * Resume callback from host.
+ *
+ * This function tries to determine if the same card is still present
+ * and, if so, restore all state to it.
+ */
+static int mmc_sd_resume(struct mmc_host *host)
+{
+	int err;
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+	int retries;
+#endif
+
+	BUG_ON(!host);
+	BUG_ON(!host->card);
+
+	mmc_claim_host(host);
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+	retries = 5;
+	while (retries) {
+		err = mmc_sd_init_card(host, host->ocr, host->card);
+
+		if (err) {
+			printk(KERN_ERR "%s: Re-init card rc = %d (retries = %d)\n",
+			       mmc_hostname(host), err, retries);
+			mdelay(5);
+			retries--;
+			continue;
+		}
+		break;
+	}
+#else
+	err = mmc_sd_init_card(host, host->ocr, host->card);
+#endif
+	mmc_release_host(host);
+
+	return err;
+}
+
+static int mmc_sd_power_restore(struct mmc_host *host)
+{
+	int ret;
+
+	host->card->state &= ~MMC_STATE_HIGHSPEED;
+	mmc_claim_host(host);
+	ret = mmc_sd_init_card(host, host->ocr, host->card);
+	mmc_release_host(host);
+
+	return ret;
+}
+
+static const struct mmc_bus_ops mmc_sd_ops = {
+	.remove = mmc_sd_remove,
+	.detect = mmc_sd_detect,
+	.suspend = NULL,
+	.resume = NULL,
+	.power_restore = mmc_sd_power_restore,
+	.alive = mmc_sd_alive,
+};
+
+static const struct mmc_bus_ops mmc_sd_ops_unsafe = {
+	.remove = mmc_sd_remove,
+	.detect = mmc_sd_detect,
+	.suspend = mmc_sd_suspend,
+	.resume = mmc_sd_resume,
+	.power_restore = mmc_sd_power_restore,
+	.alive = mmc_sd_alive,
+};
+
+static void mmc_sd_attach_bus_ops(struct mmc_host *host)
+{
+	const struct mmc_bus_ops *bus_ops;
+
+	if (!mmc_card_is_removable(host))
+		bus_ops = &mmc_sd_ops_unsafe;
+	else
+		bus_ops = &mmc_sd_ops;
+	mmc_attach_bus(host, bus_ops);
+}
+
+/*
+ * Starting point for SD card init.
+ */
+int mmc_attach_sd(struct mmc_host *host)
+{
+	int err;
+	u32 ocr;
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+	int retries;
+#endif
+
+	BUG_ON(!host);
+	WARN_ON(!host->claimed);
+
+	/* Disable preset value enable if already set since last time */
+	if (host->ops->enable_preset_value) {
+		mmc_host_clk_hold(host);
+		host->ops->enable_preset_value(host, false);
+		mmc_host_clk_release(host);
+	}
+
+	err = mmc_send_app_op_cond(host, 0, &ocr);
+	if (err)
+		return err;
+
+	mmc_sd_attach_bus_ops(host);
+	if (host->ocr_avail_sd)
+		host->ocr_avail = host->ocr_avail_sd;
+
+	/*
+	 * We need to get OCR a different way for SPI.
+	 */
+	if (mmc_host_is_spi(host)) {
+		mmc_go_idle(host);
+
+		err = mmc_spi_read_ocr(host, 0, &ocr);
+		if (err)
+			goto err;
+	}
+
+	/*
+	 * Sanity check the voltages that the card claims to
+	 * support.
+	 */
+	if (ocr & 0x7F) {
+		pr_warning("%s: card claims to support voltages "
+		       "below the defined range. These will be ignored.\n",
+		       mmc_hostname(host));
+		ocr &= ~0x7F;
+	}
+
+	if ((ocr & MMC_VDD_165_195) &&
+	    !(host->ocr_avail_sd & MMC_VDD_165_195)) {
+		pr_warning("%s: SD card claims to support the "
+		       "incompletely defined 'low voltage range'. This "
+		       "will be ignored.\n", mmc_hostname(host));
+		ocr &= ~MMC_VDD_165_195;
+	}
+
+	host->ocr = mmc_select_voltage(host, ocr);
+
+	/*
+	 * Can we support the voltage(s) of the card(s)?
+	 */
+	if (!host->ocr) {
+		err = -EINVAL;
+		goto err;
+	}
+
+	/*
+	 * Detect and init the card.
+	 */
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+	retries = 5;
+	while (retries) {
+		err = mmc_sd_init_card(host, host->ocr, NULL);
+		if (err) {
+			retries--;
+			continue;
+		}
+		break;
+	}
+
+	if (!retries) {
+		printk(KERN_ERR "%s: mmc_sd_init_card() failure (err = %d)\n",
+		       mmc_hostname(host), err);
+		goto err;
+	}
+#else
+	err = mmc_sd_init_card(host, host->ocr, NULL);
+	if (err)
+		goto err;
+#endif
+
+	mmc_release_host(host);
+	err = mmc_add_card(host->card);
+	mmc_claim_host(host);
+	if (err)
+		goto remove_card;
+
+	return 0;
+
+remove_card:
+	mmc_release_host(host);
+	mmc_remove_card(host->card);
+	host->card = NULL;
+	mmc_claim_host(host);
+err:
+	mmc_detach_bus(host);
+
+	pr_err("%s: error %d whilst initialising SD card\n",
+		mmc_hostname(host), err);
+
+	return err;
+}
+
diff --git a/ANDROID_3.4.5/drivers/mmc/core/sd.h b/ANDROID_3.4.5/drivers/mmc/core/sd.h
new file mode 100644
index 00000000..4b34b24f
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/sd.h
@@ -0,0 +1,17 @@
+#ifndef _MMC_CORE_SD_H
+#define _MMC_CORE_SD_H
+
+#include <linux/mmc/card.h>
+
+extern struct device_type sd_type;
+
+int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr);
+int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card);
+void mmc_decode_cid(struct mmc_card *card);
+int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
+	bool reinit);
+unsigned mmc_sd_get_max_clock(struct mmc_card *card);
+int mmc_sd_switch_hs(struct mmc_card *card);
+void mmc_sd_go_highspeed(struct mmc_card *card);
+
+#endif
diff --git a/ANDROID_3.4.5/drivers/mmc/core/sd_ops.c b/ANDROID_3.4.5/drivers/mmc/core/sd_ops.c
new file mode 100644
index 00000000..274ef00b
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/sd_ops.c
@@ -0,0 +1,392 @@
+/*
+ *  linux/drivers/mmc/core/sd_ops.h
+ *
+ *  Copyright 2006-2007 Pierre Ossman
+ *
+ * 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.
+ */
+
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/export.h>
+#include <linux/scatterlist.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sd.h>
+
+#include "core.h"
+#include "sd_ops.h"
+
+int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
+{
+	int err;
+	struct mmc_command cmd = {0};
+
+	BUG_ON(!host);
+	BUG_ON(card && (card->host != host));
+
+	cmd.opcode = MMC_APP_CMD;
+
+	if (card) {
+		cmd.arg = card->rca << 16;
+		cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
+	} else {
+		cmd.arg = 0;
+		cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_BCR;
+	}
+
+	err = mmc_wait_for_cmd(host, &cmd, 0);
+	if (err)
+		return err;
+
+	/* Check that card supported application commands */
+	if (!mmc_host_is_spi(host) && !(cmd.resp[0] & R1_APP_CMD))
+		return -EOPNOTSUPP;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mmc_app_cmd);
+
+/**
+ *	mmc_wait_for_app_cmd - start an application command and wait for
+ 			       completion
+ *	@host: MMC host to start command
+ *	@card: Card to send MMC_APP_CMD to
+ *	@cmd: MMC command to start
+ *	@retries: maximum number of retries
+ *
+ *	Sends a MMC_APP_CMD, checks the card response, sends the command
+ *	in the parameter and waits for it to complete. Return any error
+ *	that occurred while the command was executing.  Do not attempt to
+ *	parse the response.
+ */
+int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
+	struct mmc_command *cmd, int retries)
+{
+	struct mmc_request mrq = {NULL};
+
+	int i, err;
+
+	BUG_ON(!cmd);
+	BUG_ON(retries < 0);
+
+	err = -EIO;
+
+	/*
+	 * We have to resend MMC_APP_CMD for each attempt so
+	 * we cannot use the retries field in mmc_command.
+	 */
+	for (i = 0;i <= retries;i++) {
+		err = mmc_app_cmd(host, card);
+		if (err) {
+			/* no point in retrying; no APP commands allowed */
+			if (mmc_host_is_spi(host)) {
+				if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
+					break;
+			}
+			continue;
+		}
+
+		memset(&mrq, 0, sizeof(struct mmc_request));
+
+		memset(cmd->resp, 0, sizeof(cmd->resp));
+		cmd->retries = 0;
+
+		mrq.cmd = cmd;
+		cmd->data = NULL;
+
+		mmc_wait_for_req(host, &mrq);
+
+		err = cmd->error;
+		if (!cmd->error)
+			break;
+
+		/* no point in retrying illegal APP commands */
+		if (mmc_host_is_spi(host)) {
+			if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
+				break;
+		}
+	}
+
+	return err;
+}
+
+EXPORT_SYMBOL(mmc_wait_for_app_cmd);
+
+int mmc_app_set_bus_width(struct mmc_card *card, int width)
+{
+	int err;
+	struct mmc_command cmd = {0};
+
+	BUG_ON(!card);
+	BUG_ON(!card->host);
+
+	cmd.opcode = SD_APP_SET_BUS_WIDTH;
+	cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+	switch (width) {
+	case MMC_BUS_WIDTH_1:
+		cmd.arg = SD_BUS_WIDTH_1;
+		break;
+	case MMC_BUS_WIDTH_4:
+		cmd.arg = SD_BUS_WIDTH_4;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	err = mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
+{
+	struct mmc_command cmd = {0};
+	int i, err = 0;
+
+	BUG_ON(!host);
+
+	cmd.opcode = SD_APP_OP_COND;
+	if (mmc_host_is_spi(host))
+		cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
+	else
+		cmd.arg = ocr;
+	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
+
+	for (i = 100; i; i--) {
+		err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES);
+		if (err)
+			break;
+
+		/* if we're just probing, do a single pass */
+		if (ocr == 0)
+			break;
+
+		/* otherwise wait until reset completes */
+		if (mmc_host_is_spi(host)) {
+			if (!(cmd.resp[0] & R1_SPI_IDLE))
+				break;
+		} else {
+			if (cmd.resp[0] & MMC_CARD_BUSY)
+				break;
+		}
+
+		err = -ETIMEDOUT;
+
+		mmc_delay(10);
+	}
+
+	if (rocr && !mmc_host_is_spi(host))
+		*rocr = cmd.resp[0];
+
+	return err;
+}
+
+int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
+{
+	struct mmc_command cmd = {0};
+	int err;
+	static const u8 test_pattern = 0xAA;
+	u8 result_pattern;
+
+	/*
+	 * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
+	 * before SD_APP_OP_COND. This command will harmlessly fail for
+	 * SD 1.0 cards.
+	 */
+	cmd.opcode = SD_SEND_IF_COND;
+	cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
+	cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR;
+
+	err = mmc_wait_for_cmd(host, &cmd, 0);
+	if (err)
+		return err;
+
+	if (mmc_host_is_spi(host))
+		result_pattern = cmd.resp[1] & 0xFF;
+	else
+		result_pattern = cmd.resp[0] & 0xFF;
+
+	if (result_pattern != test_pattern)
+		return -EIO;
+
+	return 0;
+}
+
+int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
+{
+	int err;
+	struct mmc_command cmd = {0};
+
+	BUG_ON(!host);
+	BUG_ON(!rca);
+
+	cmd.opcode = SD_SEND_RELATIVE_ADDR;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
+
+	err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
+	if (err)
+		return err;
+
+	*rca = cmd.resp[0] >> 16;
+
+	return 0;
+}
+
+int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
+{
+	int err;
+	struct mmc_request mrq = {NULL};
+	struct mmc_command cmd = {0};
+	struct mmc_data data = {0};
+	struct scatterlist sg;
+	void *data_buf;
+
+	BUG_ON(!card);
+	BUG_ON(!card->host);
+	BUG_ON(!scr);
+
+	/* NOTE: caller guarantees scr is heap-allocated */
+
+	err = mmc_app_cmd(card->host, card);
+	if (err)
+		return err;
+
+	/* dma onto stack is unsafe/nonportable, but callers to this
+	 * routine normally provide temporary on-stack buffers ...
+	 */
+	data_buf = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
+	if (data_buf == NULL)
+		return -ENOMEM;
+
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+
+	cmd.opcode = SD_APP_SEND_SCR;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
+
+	data.blksz = 8;
+	data.blocks = 1;
+	data.flags = MMC_DATA_READ;
+	data.sg = &sg;
+	data.sg_len = 1;
+
+	sg_init_one(&sg, data_buf, 8);
+
+	mmc_set_data_timeout(&data, card);
+
+	mmc_wait_for_req(card->host, &mrq);
+
+	memcpy(scr, data_buf, sizeof(card->raw_scr));
+	kfree(data_buf);
+
+	if (cmd.error)
+		return cmd.error;
+	if (data.error)
+		return data.error;
+
+	scr[0] = be32_to_cpu(scr[0]);
+	scr[1] = be32_to_cpu(scr[1]);
+
+	return 0;
+}
+
+int mmc_sd_switch(struct mmc_card *card, int mode, int group,
+	u8 value, u8 *resp)
+{
+	struct mmc_request mrq = {NULL};
+	struct mmc_command cmd = {0};
+	struct mmc_data data = {0};
+	struct scatterlist sg;
+
+	BUG_ON(!card);
+	BUG_ON(!card->host);
+
+	/* NOTE: caller guarantees resp is heap-allocated */
+
+	mode = !!mode;
+	value &= 0xF;
+
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+
+	cmd.opcode = SD_SWITCH;
+	cmd.arg = mode << 31 | 0x00FFFFFF;
+	cmd.arg &= ~(0xF << (group * 4));
+	cmd.arg |= value << (group * 4);
+	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
+
+	data.blksz = 64;
+	data.blocks = 1;
+	data.flags = MMC_DATA_READ;
+	data.sg = &sg;
+	data.sg_len = 1;
+
+	sg_init_one(&sg, resp, 64);
+
+	mmc_set_data_timeout(&data, card);
+
+	mmc_wait_for_req(card->host, &mrq);
+
+	if (cmd.error)
+		return cmd.error;
+	if (data.error)
+		return data.error;
+
+	return 0;
+}
+
+int mmc_app_sd_status(struct mmc_card *card, void *ssr)
+{
+	int err;
+	struct mmc_request mrq = {NULL};
+	struct mmc_command cmd = {0};
+	struct mmc_data data = {0};
+	struct scatterlist sg;
+
+	BUG_ON(!card);
+	BUG_ON(!card->host);
+	BUG_ON(!ssr);
+
+	/* NOTE: caller guarantees ssr is heap-allocated */
+
+	err = mmc_app_cmd(card->host, card);
+	if (err)
+		return err;
+
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+
+	cmd.opcode = SD_APP_SD_STATUS;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;
+
+	data.blksz = 64;
+	data.blocks = 1;
+	data.flags = MMC_DATA_READ;
+	data.sg = &sg;
+	data.sg_len = 1;
+
+	sg_init_one(&sg, ssr, 64);
+
+	mmc_set_data_timeout(&data, card);
+
+	mmc_wait_for_req(card->host, &mrq);
+
+	if (cmd.error)
+		return cmd.error;
+	if (data.error)
+		return data.error;
+
+	return 0;
+}
diff --git a/ANDROID_3.4.5/drivers/mmc/core/sd_ops.h b/ANDROID_3.4.5/drivers/mmc/core/sd_ops.h
new file mode 100644
index 00000000..ffc2305d
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/sd_ops.h
@@ -0,0 +1,25 @@
+/*
+ *  linux/drivers/mmc/core/sd_ops.h
+ *
+ *  Copyright 2006-2007 Pierre Ossman
+ *
+ * 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.
+ */
+
+#ifndef _MMC_SD_OPS_H
+#define _MMC_SD_OPS_H
+
+int mmc_app_set_bus_width(struct mmc_card *card, int width);
+int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr);
+int mmc_send_if_cond(struct mmc_host *host, u32 ocr);
+int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca);
+int mmc_app_send_scr(struct mmc_card *card, u32 *scr);
+int mmc_sd_switch(struct mmc_card *card, int mode, int group,
+	u8 value, u8 *resp);
+int mmc_app_sd_status(struct mmc_card *card, void *ssr);
+
+#endif
+
diff --git a/ANDROID_3.4.5/drivers/mmc/core/sdio.c b/ANDROID_3.4.5/drivers/mmc/core/sdio.c
new file mode 100644
index 00000000..341b4c0f
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/sdio.c
@@ -0,0 +1,1260 @@
+/*
+ *  linux/drivers/mmc/sdio.c
+ *
+ *  Copyright 2006-2007 Pierre Ossman
+ *
+ * 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.
+ */
+
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sdio.h>
+#include <linux/mmc/sdio_func.h>
+#include <linux/mmc/sdio_ids.h>
+
+#include "core.h"
+#include "bus.h"
+#include "sd.h"
+#include "sdio_bus.h"
+#include "mmc_ops.h"
+#include "sd_ops.h"
+#include "sdio_ops.h"
+#include "sdio_cis.h"
+
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+#include <linux/mmc/sdio_ids.h>
+#endif
+
+static int sdio_read_fbr(struct sdio_func *func)
+{
+	int ret;
+	unsigned char data;
+
+	if (mmc_card_nonstd_func_interface(func->card)) {
+		func->class = SDIO_CLASS_NONE;
+		return 0;
+	}
+
+	ret = mmc_io_rw_direct(func->card, 0, 0,
+		SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data);
+	if (ret)
+		goto out;
+
+	data &= 0x0f;
+
+	if (data == 0x0f) {
+		ret = mmc_io_rw_direct(func->card, 0, 0,
+			SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data);
+		if (ret)
+			goto out;
+	}
+
+	func->class = data;
+
+out:
+	return ret;
+}
+
+static int sdio_init_func(struct mmc_card *card, unsigned int fn)
+{
+	int ret;
+	struct sdio_func *func;
+
+	BUG_ON(fn > SDIO_MAX_FUNCS);
+
+	func = sdio_alloc_func(card);
+	if (IS_ERR(func))
+		return PTR_ERR(func);
+
+	func->num = fn;
+
+	if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) {
+		ret = sdio_read_fbr(func);
+		if (ret)
+			goto fail;
+
+		ret = sdio_read_func_cis(func);
+		if (ret)
+			goto fail;
+	} else {
+		func->vendor = func->card->cis.vendor;
+		func->device = func->card->cis.device;
+		func->max_blksize = func->card->cis.blksize;
+	}
+
+	card->sdio_func[fn - 1] = func;
+
+	return 0;
+
+fail:
+	/*
+	 * It is okay to remove the function here even though we hold
+	 * the host lock as we haven't registered the device yet.
+	 */
+	sdio_remove_func(func);
+	return ret;
+}
+
+static int sdio_read_cccr(struct mmc_card *card, u32 ocr)
+{
+	int ret;
+	int cccr_vsn;
+	int uhs = ocr & R4_18V_PRESENT;
+	unsigned char data;
+	unsigned char speed;
+
+	memset(&card->cccr, 0, sizeof(struct sdio_cccr));
+
+	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data);
+	if (ret)
+		goto out;
+
+	cccr_vsn = data & 0x0f;
+
+	if (cccr_vsn > SDIO_CCCR_REV_3_00) {
+		pr_err("%s: unrecognised CCCR structure version %d\n",
+			mmc_hostname(card->host), cccr_vsn);
+		return -EINVAL;
+	}
+
+	card->cccr.sdio_vsn = (data & 0xf0) >> 4;
+
+	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data);
+	if (ret)
+		goto out;
+
+	if (data & SDIO_CCCR_CAP_SMB)
+		card->cccr.multi_block = 1;
+	if (data & SDIO_CCCR_CAP_LSC)
+		card->cccr.low_speed = 1;
+	if (data & SDIO_CCCR_CAP_4BLS)
+		card->cccr.wide_bus = 1;
+
+	if (cccr_vsn >= SDIO_CCCR_REV_1_10) {
+		ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data);
+		if (ret)
+			goto out;
+
+		if (data & SDIO_POWER_SMPC)
+			card->cccr.high_power = 1;
+	}
+
+	if (cccr_vsn >= SDIO_CCCR_REV_1_20) {
+		ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
+		if (ret)
+			goto out;
+
+		card->scr.sda_spec3 = 0;
+		card->sw_caps.sd3_bus_mode = 0;
+		card->sw_caps.sd3_drv_type = 0;
+		if (cccr_vsn >= SDIO_CCCR_REV_3_00 && uhs) {
+			card->scr.sda_spec3 = 1;
+			ret = mmc_io_rw_direct(card, 0, 0,
+				SDIO_CCCR_UHS, 0, &data);
+			if (ret)
+				goto out;
+
+			if (card->host->caps &
+				(MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
+				 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 |
+				 MMC_CAP_UHS_DDR50)) {
+				if (data & SDIO_UHS_DDR50)
+					card->sw_caps.sd3_bus_mode
+						|= SD_MODE_UHS_DDR50;
+
+				if (data & SDIO_UHS_SDR50)
+					card->sw_caps.sd3_bus_mode
+						|= SD_MODE_UHS_SDR50;
+
+				if (data & SDIO_UHS_SDR104)
+					card->sw_caps.sd3_bus_mode
+						|= SD_MODE_UHS_SDR104;
+			}
+
+			ret = mmc_io_rw_direct(card, 0, 0,
+				SDIO_CCCR_DRIVE_STRENGTH, 0, &data);
+			if (ret)
+				goto out;
+
+			if (data & SDIO_DRIVE_SDTA)
+				card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_A;
+			if (data & SDIO_DRIVE_SDTC)
+				card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_C;
+			if (data & SDIO_DRIVE_SDTD)
+				card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_D;
+		}
+
+		/* if no uhs mode ensure we check for high speed */
+		if (!card->sw_caps.sd3_bus_mode) {
+			if (speed & SDIO_SPEED_SHS) {
+				card->cccr.high_speed = 1;
+				card->sw_caps.hs_max_dtr = 50000000;
+			} else {
+				card->cccr.high_speed = 0;
+				card->sw_caps.hs_max_dtr = 25000000;
+			}
+		}
+	}
+
+out:
+	return ret;
+}
+
+static int sdio_enable_wide(struct mmc_card *card)
+{
+	int ret;
+	u8 ctrl;
+
+	if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
+		return 0;
+
+	if (card->cccr.low_speed && !card->cccr.wide_bus)
+		return 0;
+
+	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
+	if (ret)
+		return ret;
+
+	ctrl |= SDIO_BUS_WIDTH_4BIT;
+
+	ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
+	if (ret)
+		return ret;
+
+	return 1;
+}
+
+/*
+ * If desired, disconnect the pull-up resistor on CD/DAT[3] (pin 1)
+ * of the card. This may be required on certain setups of boards,
+ * controllers and embedded sdio device which do not need the card's
+ * pull-up. As a result, card detection is disabled and power is saved.
+ */
+static int sdio_disable_cd(struct mmc_card *card)
+{
+	int ret;
+	u8 ctrl;
+
+	if (!mmc_card_disable_cd(card))
+		return 0;
+
+	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
+	if (ret)
+		return ret;
+
+	ctrl |= SDIO_BUS_CD_DISABLE;
+
+	return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
+}
+
+/*
+ * Devices that remain active during a system suspend are
+ * put back into 1-bit mode.
+ */
+static int sdio_disable_wide(struct mmc_card *card)
+{
+	int ret;
+	u8 ctrl;
+
+	if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
+		return 0;
+
+	if (card->cccr.low_speed && !card->cccr.wide_bus)
+		return 0;
+
+	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
+	if (ret)
+		return ret;
+
+	if (!(ctrl & SDIO_BUS_WIDTH_4BIT))
+		return 0;
+
+	ctrl &= ~SDIO_BUS_WIDTH_4BIT;
+	ctrl |= SDIO_BUS_ASYNC_INT;
+
+	ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
+	if (ret)
+		return ret;
+
+	mmc_set_bus_width(card->host, MMC_BUS_WIDTH_1);
+
+	return 0;
+}
+
+
+static int sdio_enable_4bit_bus(struct mmc_card *card)
+{
+	int err;
+
+	if (card->type == MMC_TYPE_SDIO)
+		return sdio_enable_wide(card);
+
+	if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
+		(card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
+		err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
+		if (err)
+			return err;
+	} else
+		return 0;
+
+	err = sdio_enable_wide(card);
+	if (err <= 0)
+		mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1);
+
+	return err;
+}
+
+
+/*
+ * Test if the card supports high-speed mode and, if so, switch to it.
+ */
+static int mmc_sdio_switch_hs(struct mmc_card *card, int enable)
+{
+	int ret;
+	u8 speed;
+
+	if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
+		return 0;
+
+	if (!card->cccr.high_speed)
+		return 0;
+
+	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
+	if (ret)
+		return ret;
+
+	if (enable)
+		speed |= SDIO_SPEED_EHS;
+	else
+		speed &= ~SDIO_SPEED_EHS;
+
+	ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
+	if (ret)
+		return ret;
+
+	return 1;
+}
+
+/*
+ * Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported.
+ */
+static int sdio_enable_hs(struct mmc_card *card)
+{
+	int ret;
+
+	ret = mmc_sdio_switch_hs(card, true);
+	if (ret <= 0 || card->type == MMC_TYPE_SDIO)
+		return ret;
+
+	ret = mmc_sd_switch_hs(card);
+	if (ret <= 0)
+		mmc_sdio_switch_hs(card, false);
+
+	return ret;
+}
+
+static unsigned mmc_sdio_get_max_clock(struct mmc_card *card)
+{
+	unsigned max_dtr;
+
+	if (mmc_card_highspeed(card)) {
+		/*
+		 * The SDIO specification doesn't mention how
+		 * the CIS transfer speed register relates to
+		 * high-speed, but it seems that 50 MHz is
+		 * mandatory.
+		 */
+		max_dtr = 50000000;
+	} else {
+		max_dtr = card->cis.max_dtr;
+	}
+
+	if (card->type == MMC_TYPE_SD_COMBO)
+		max_dtr = min(max_dtr, mmc_sd_get_max_clock(card));
+
+	return max_dtr;
+}
+
+static unsigned char host_drive_to_sdio_drive(int host_strength)
+{
+	switch (host_strength) {
+	case MMC_SET_DRIVER_TYPE_A:
+		return SDIO_DTSx_SET_TYPE_A;
+	case MMC_SET_DRIVER_TYPE_B:
+		return SDIO_DTSx_SET_TYPE_B;
+	case MMC_SET_DRIVER_TYPE_C:
+		return SDIO_DTSx_SET_TYPE_C;
+	case MMC_SET_DRIVER_TYPE_D:
+		return SDIO_DTSx_SET_TYPE_D;
+	default:
+		return SDIO_DTSx_SET_TYPE_B;
+	}
+}
+
+static void sdio_select_driver_type(struct mmc_card *card)
+{
+	int host_drv_type = SD_DRIVER_TYPE_B;
+	int card_drv_type = SD_DRIVER_TYPE_B;
+	int drive_strength;
+	unsigned char card_strength;
+	int err;
+
+	/*
+	 * If the host doesn't support any of the Driver Types A,C or D,
+	 * or there is no board specific handler then default Driver
+	 * Type B is used.
+	 */
+	if (!(card->host->caps &
+		(MMC_CAP_DRIVER_TYPE_A |
+		 MMC_CAP_DRIVER_TYPE_C |
+		 MMC_CAP_DRIVER_TYPE_D)))
+		return;
+
+	if (!card->host->ops->select_drive_strength)
+		return;
+
+	if (card->host->caps & MMC_CAP_DRIVER_TYPE_A)
+		host_drv_type |= SD_DRIVER_TYPE_A;
+
+	if (card->host->caps & MMC_CAP_DRIVER_TYPE_C)
+		host_drv_type |= SD_DRIVER_TYPE_C;
+
+	if (card->host->caps & MMC_CAP_DRIVER_TYPE_D)
+		host_drv_type |= SD_DRIVER_TYPE_D;
+
+	if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A)
+		card_drv_type |= SD_DRIVER_TYPE_A;
+
+	if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C)
+		card_drv_type |= SD_DRIVER_TYPE_C;
+
+	if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_D)
+		card_drv_type |= SD_DRIVER_TYPE_D;
+
+	/*
+	 * The drive strength that the hardware can support
+	 * depends on the board design.  Pass the appropriate
+	 * information and let the hardware specific code
+	 * return what is possible given the options
+	 */
+	drive_strength = card->host->ops->select_drive_strength(
+		card->sw_caps.uhs_max_dtr,
+		host_drv_type, card_drv_type);
+
+	/* if error just use default for drive strength B */
+	err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_DRIVE_STRENGTH, 0,
+		&card_strength);
+	if (err)
+		return;
+
+	card_strength &= ~(SDIO_DRIVE_DTSx_MASK<<SDIO_DRIVE_DTSx_SHIFT);
+	card_strength |= host_drive_to_sdio_drive(drive_strength);
+
+	err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_DRIVE_STRENGTH,
+		card_strength, NULL);
+
+	/* if error default to drive strength B */
+	if (!err)
+		mmc_set_driver_type(card->host, drive_strength);
+}
+
+
+static int sdio_set_bus_speed_mode(struct mmc_card *card)
+{
+	unsigned int bus_speed, timing;
+	int err;
+	unsigned char speed;
+
+	/*
+	 * If the host doesn't support any of the UHS-I modes, fallback on
+	 * default speed.
+	 */
+	if (!(card->host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
+	    MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50)))
+		return 0;
+
+	bus_speed = SDIO_SPEED_SDR12;
+	timing = MMC_TIMING_UHS_SDR12;
+	if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
+	    (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
+			bus_speed = SDIO_SPEED_SDR104;
+			timing = MMC_TIMING_UHS_SDR104;
+			card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
+	} else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
+		   (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
+			bus_speed = SDIO_SPEED_DDR50;
+			timing = MMC_TIMING_UHS_DDR50;
+			card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		    MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
+		    SD_MODE_UHS_SDR50)) {
+			bus_speed = SDIO_SPEED_SDR50;
+			timing = MMC_TIMING_UHS_SDR50;
+			card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		    MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
+		   (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
+			bus_speed = SDIO_SPEED_SDR25;
+			timing = MMC_TIMING_UHS_SDR25;
+			card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		    MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
+		    MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
+		    SD_MODE_UHS_SDR12)) {
+			bus_speed = SDIO_SPEED_SDR12;
+			timing = MMC_TIMING_UHS_SDR12;
+			card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
+	}
+
+	err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
+	if (err)
+		return err;
+
+	speed &= ~SDIO_SPEED_BSS_MASK;
+	speed |= bus_speed;
+	err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
+	if (err)
+		return err;
+
+	if (bus_speed) {
+		mmc_set_timing(card->host, timing);
+		mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
+	}
+
+	return 0;
+}
+
+/*
+ * UHS-I specific initialization procedure
+ */
+static int mmc_sdio_init_uhs_card(struct mmc_card *card)
+{
+	int err;
+
+	if (!card->scr.sda_spec3)
+		return 0;
+
+	/*
+	 * Switch to wider bus (if supported).
+	 */
+	if (card->host->caps & MMC_CAP_4_BIT_DATA) {
+		err = sdio_enable_4bit_bus(card);
+		if (err > 0) {
+			mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
+			err = 0;
+		}
+	}
+
+	/* Set the driver strength for the card */
+	sdio_select_driver_type(card);
+
+	/* Set bus speed mode of the card */
+	err = sdio_set_bus_speed_mode(card);
+	if (err)
+		goto out;
+
+	/* Initialize and start re-tuning timer */
+	if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning)
+		err = card->host->ops->execute_tuning(card->host,
+						      MMC_SEND_TUNING_BLOCK);
+
+out:
+
+	return err;
+}
+
+/*
+ * Handle the detection and initialisation of a card.
+ *
+ * In the case of a resume, "oldcard" will contain the card
+ * we're trying to reinitialise.
+ */
+static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
+			      struct mmc_card *oldcard, int powered_resume)
+{
+	struct mmc_card *card;
+	int err;
+
+	BUG_ON(!host);
+	WARN_ON(!host->claimed);
+
+	/*
+	 * Inform the card of the voltage
+	 */
+	if (!powered_resume) {
+		/* The initialization should be done at 3.3 V I/O voltage. */
+		mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
+
+		err = mmc_send_io_op_cond(host, host->ocr, &ocr);
+		if (err)
+			goto err;
+	}
+
+	/*
+	 * For SPI, enable CRC as appropriate.
+	 */
+	if (mmc_host_is_spi(host)) {
+		err = mmc_spi_set_crc(host, use_spi_crc);
+		if (err)
+			goto err;
+	}
+
+	/*
+	 * Allocate card structure.
+	 */
+	card = mmc_alloc_card(host, NULL);
+	if (IS_ERR(card)) {
+		err = PTR_ERR(card);
+		goto err;
+	}
+
+	if ((ocr & R4_MEMORY_PRESENT) &&
+	    mmc_sd_get_cid(host, host->ocr & ocr, card->raw_cid, NULL) == 0) {
+		card->type = MMC_TYPE_SD_COMBO;
+
+		if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO ||
+		    memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) {
+			mmc_remove_card(card);
+			return -ENOENT;
+		}
+	} else {
+		card->type = MMC_TYPE_SDIO;
+
+		if (oldcard && oldcard->type != MMC_TYPE_SDIO) {
+			mmc_remove_card(card);
+			return -ENOENT;
+		}
+	}
+
+	/*
+	 * Call the optional HC's init_card function to handle quirks.
+	 */
+	if (host->ops->init_card)
+		host->ops->init_card(host, card);
+
+	/*
+	 * If the host and card support UHS-I mode request the card
+	 * to switch to 1.8V signaling level.  No 1.8v signalling if
+	 * UHS mode is not enabled to maintain compatibilty and some
+	 * systems that claim 1.8v signalling in fact do not support
+	 * it.
+	 */
+	if ((ocr & R4_18V_PRESENT) &&
+		(host->caps &
+			(MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
+			 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 |
+			 MMC_CAP_UHS_DDR50))) {
+		err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180,
+				true);
+		if (err) {
+			ocr &= ~R4_18V_PRESENT;
+			host->ocr &= ~R4_18V_PRESENT;
+		}
+		err = 0;
+	} else {
+		ocr &= ~R4_18V_PRESENT;
+		host->ocr &= ~R4_18V_PRESENT;
+	}
+
+	/*
+	 * For native busses:  set card RCA and quit open drain mode.
+	 */
+	if (!powered_resume && !mmc_host_is_spi(host)) {
+		err = mmc_send_relative_addr(host, &card->rca);
+		if (err)
+			goto remove;
+
+		/*
+		 * Update oldcard with the new RCA received from the SDIO
+		 * device -- we're doing this so that it's updated in the
+		 * "card" struct when oldcard overwrites that later.
+		 */
+		if (oldcard)
+			oldcard->rca = card->rca;
+	}
+
+	/*
+	 * Read CSD, before selecting the card
+	 */
+	if (!oldcard && card->type == MMC_TYPE_SD_COMBO) {
+		err = mmc_sd_get_csd(host, card);
+		if (err)
+			return err;
+
+		mmc_decode_cid(card);
+	}
+
+	/*
+	 * Select card, as all following commands rely on that.
+	 */
+	if (!powered_resume && !mmc_host_is_spi(host)) {
+		err = mmc_select_card(card);
+		if (err)
+			goto remove;
+	}
+
+	if (card->quirks & MMC_QUIRK_NONSTD_SDIO) {
+		/*
+		 * This is non-standard SDIO device, meaning it doesn't
+		 * have any CIA (Common I/O area) registers present.
+		 * It's host's responsibility to fill cccr and cis
+		 * structures in init_card().
+		 */
+		mmc_set_clock(host, card->cis.max_dtr);
+
+		if (card->cccr.high_speed) {
+			mmc_card_set_highspeed(card);
+			mmc_set_timing(card->host, MMC_TIMING_SD_HS);
+		}
+
+		goto finish;
+	}
+
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+	if (host->embedded_sdio_data.cccr)
+		memcpy(&card->cccr, host->embedded_sdio_data.cccr, sizeof(struct sdio_cccr));
+	else {
+#endif
+		/*
+		 * Read the common registers.
+		 */
+		err = sdio_read_cccr(card,  ocr);
+		if (err)
+			goto remove;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+	}
+#endif
+
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+	if (host->embedded_sdio_data.cis)
+		memcpy(&card->cis, host->embedded_sdio_data.cis, sizeof(struct sdio_cis));
+	else {
+#endif
+		/*
+		 * Read the common CIS tuples.
+		 */
+		err = sdio_read_common_cis(card);
+		if (err)
+			goto remove;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+	}
+#endif
+
+	if (oldcard) {
+		int same = (card->cis.vendor == oldcard->cis.vendor &&
+			    card->cis.device == oldcard->cis.device);
+		mmc_remove_card(card);
+		if (!same)
+			return -ENOENT;
+
+		card = oldcard;
+	}
+	mmc_fixup_device(card, NULL);
+
+	if (card->type == MMC_TYPE_SD_COMBO) {
+		err = mmc_sd_setup_card(host, card, oldcard != NULL);
+		/* handle as SDIO-only card if memory init failed */
+		if (err) {
+			mmc_go_idle(host);
+			if (mmc_host_is_spi(host))
+				/* should not fail, as it worked previously */
+				mmc_spi_set_crc(host, use_spi_crc);
+			card->type = MMC_TYPE_SDIO;
+		} else
+			card->dev.type = &sd_type;
+	}
+
+	/*
+	 * If needed, disconnect card detection pull-up resistor.
+	 */
+	err = sdio_disable_cd(card);
+	if (err)
+		goto remove;
+
+	/* Initialization sequence for UHS-I cards */
+	/* Only if card supports 1.8v and UHS signaling */
+	if ((ocr & R4_18V_PRESENT) && card->sw_caps.sd3_bus_mode) {
+		err = mmc_sdio_init_uhs_card(card);
+		if (err)
+			goto remove;
+
+		/* Card is an ultra-high-speed card */
+		mmc_card_set_uhs(card);
+	} else {
+		/*
+		 * Switch to high-speed (if supported).
+		 */
+		err = sdio_enable_hs(card);
+		if (err > 0)
+			mmc_sd_go_highspeed(card);
+		else if (err)
+			goto remove;
+
+		/*
+		 * Change to the card's maximum speed.
+		 */
+		mmc_set_clock(host, mmc_sdio_get_max_clock(card));
+
+		/*
+		 * Switch to wider bus (if supported).
+		 */
+		err = sdio_enable_4bit_bus(card);
+		if (err > 0)
+			mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
+		else if (err)
+			goto remove;
+	}
+finish:
+	if (!oldcard)
+		host->card = card;
+	return 0;
+
+remove:
+	if (!oldcard)
+		mmc_remove_card(card);
+
+err:
+	return err;
+}
+
+/*
+ * Host is being removed. Free up the current card.
+ */
+static void mmc_sdio_remove(struct mmc_host *host)
+{
+	int i;
+
+	BUG_ON(!host);
+	BUG_ON(!host->card);
+
+	for (i = 0;i < host->card->sdio_funcs;i++) {
+		if (host->card->sdio_func[i]) {
+			sdio_remove_func(host->card->sdio_func[i]);
+			host->card->sdio_func[i] = NULL;
+		}
+	}
+
+	mmc_remove_card(host->card);
+	host->card = NULL;
+}
+
+/*
+ * Card detection - card is alive.
+ */
+static int mmc_sdio_alive(struct mmc_host *host)
+{
+	return mmc_select_card(host->card);
+}
+
+/*
+ * Card detection callback from host.
+ */
+static void mmc_sdio_detect(struct mmc_host *host)
+{
+	int err;
+
+	BUG_ON(!host);
+	BUG_ON(!host->card);
+
+	/* Make sure card is powered before detecting it */
+	if (host->caps & MMC_CAP_POWER_OFF_CARD) {
+		err = pm_runtime_get_sync(&host->card->dev);
+		if (err < 0)
+			goto out;
+	}
+
+	mmc_claim_host(host);
+
+	/*
+	 * Just check if our card has been removed.
+	 */
+	err = _mmc_detect_card_removed(host);
+
+	mmc_release_host(host);
+
+	/*
+	 * Tell PM core it's OK to power off the card now.
+	 *
+	 * The _sync variant is used in order to ensure that the card
+	 * is left powered off in case an error occurred, and the card
+	 * is going to be removed.
+	 *
+	 * Since there is no specific reason to believe a new user
+	 * is about to show up at this point, the _sync variant is
+	 * desirable anyway.
+	 */
+	if (host->caps & MMC_CAP_POWER_OFF_CARD)
+		pm_runtime_put_sync(&host->card->dev);
+
+out:
+	if (err) {
+		mmc_sdio_remove(host);
+
+		mmc_claim_host(host);
+		mmc_detach_bus(host);
+		mmc_power_off(host);
+		mmc_release_host(host);
+	}
+}
+
+/*
+ * SDIO suspend.  We need to suspend all functions separately.
+ * Therefore all registered functions must have drivers with suspend
+ * and resume methods.  Failing that we simply remove the whole card.
+ */
+static int mmc_sdio_suspend(struct mmc_host *host)
+{
+	int i, err = 0;
+
+	for (i = 0; i < host->card->sdio_funcs; i++) {
+		struct sdio_func *func = host->card->sdio_func[i];
+		if (func && sdio_func_present(func) && func->dev.driver) {
+			const struct dev_pm_ops *pmops = func->dev.driver->pm;
+			if (!pmops || !pmops->suspend || !pmops->resume) {
+				/* force removal of entire card in that case */
+				err = -ENOSYS;
+			} else
+				err = pmops->suspend(&func->dev);
+			if (err)
+				break;
+		}
+	}
+	while (err && --i >= 0) {
+		struct sdio_func *func = host->card->sdio_func[i];
+		if (func && sdio_func_present(func) && func->dev.driver) {
+			const struct dev_pm_ops *pmops = func->dev.driver->pm;
+			pmops->resume(&func->dev);
+		}
+	}
+
+	if (!err && mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) {
+		mmc_claim_host(host);
+		sdio_disable_wide(host->card);
+		mmc_release_host(host);
+	}
+
+	return err;
+}
+
+static int mmc_sdio_resume(struct mmc_host *host)
+{
+	int i, err = 0;
+
+	BUG_ON(!host);
+	BUG_ON(!host->card);
+
+	/* Basic card reinitialization. */
+	mmc_claim_host(host);
+
+	/* No need to reinitialize powered-resumed nonremovable cards */
+	if (mmc_card_is_removable(host) || !mmc_card_keep_power(host))
+		err = mmc_sdio_init_card(host, host->ocr, host->card,
+					mmc_card_keep_power(host));
+	else if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) {
+		/* We may have switched to 1-bit mode during suspend */
+		err = sdio_enable_4bit_bus(host->card);
+		if (err > 0) {
+			mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
+			err = 0;
+		}
+	}
+
+	if (!err && host->sdio_irqs)
+		wake_up_process(host->sdio_irq_thread);
+	mmc_release_host(host);
+
+	/*
+	 * If the card looked to be the same as before suspending, then
+	 * we proceed to resume all card functions.  If one of them returns
+	 * an error then we simply return that error to the core and the
+	 * card will be redetected as new.  It is the responsibility of
+	 * the function driver to perform further tests with the extra
+	 * knowledge it has of the card to confirm the card is indeed the
+	 * same as before suspending (same MAC address for network cards,
+	 * etc.) and return an error otherwise.
+	 */
+	for (i = 0; !err && i < host->card->sdio_funcs; i++) {
+		struct sdio_func *func = host->card->sdio_func[i];
+		if (func && sdio_func_present(func) && func->dev.driver) {
+			const struct dev_pm_ops *pmops = func->dev.driver->pm;
+			err = pmops->resume(&func->dev);
+		}
+	}
+
+	return err;
+}
+
+static int mmc_sdio_power_restore(struct mmc_host *host)
+{
+	int ret;
+	u32 ocr;
+
+	BUG_ON(!host);
+	BUG_ON(!host->card);
+
+	mmc_claim_host(host);
+
+	/*
+	 * Reset the card by performing the same steps that are taken by
+	 * mmc_rescan_try_freq() and mmc_attach_sdio() during a "normal" probe.
+	 *
+	 * sdio_reset() is technically not needed. Having just powered up the
+	 * hardware, it should already be in reset state. However, some
+	 * platforms (such as SD8686 on OLPC) do not instantly cut power,
+	 * meaning that a reset is required when restoring power soon after
+	 * powering off. It is harmless in other cases.
+	 *
+	 * The CMD5 reset (mmc_send_io_op_cond()), according to the SDIO spec,
+	 * is not necessary for non-removable cards. However, it is required
+	 * for OLPC SD8686 (which expects a [CMD5,5,3,7] init sequence), and
+	 * harmless in other situations.
+	 *
+	 * With these steps taken, mmc_select_voltage() is also required to
+	 * restore the correct voltage setting of the card.
+	 */
+
+	/* The initialization should be done at 3.3 V I/O voltage. */
+	if (!mmc_card_keep_power(host))
+		mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
+
+	sdio_reset(host);
+	mmc_go_idle(host);
+	mmc_send_if_cond(host, host->ocr_avail);
+
+	ret = mmc_send_io_op_cond(host, 0, &ocr);
+	if (ret)
+		goto out;
+
+	if (host->ocr_avail_sdio)
+		host->ocr_avail = host->ocr_avail_sdio;
+
+	host->ocr = mmc_select_voltage(host, ocr & ~0x7F);
+	if (!host->ocr) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ret = mmc_sdio_init_card(host, host->ocr, host->card,
+				mmc_card_keep_power(host));
+	if (!ret && host->sdio_irqs)
+		mmc_signal_sdio_irq(host);
+
+out:
+	mmc_release_host(host);
+
+	return ret;
+}
+
+static const struct mmc_bus_ops mmc_sdio_ops = {
+	.remove = mmc_sdio_remove,
+	.detect = mmc_sdio_detect,
+	.suspend = mmc_sdio_suspend,
+	.resume = mmc_sdio_resume,
+	.power_restore = mmc_sdio_power_restore,
+	.alive = mmc_sdio_alive,
+};
+
+
+/*
+ * Starting point for SDIO card init.
+ */
+int mmc_attach_sdio(struct mmc_host *host)
+{
+	int err, i, funcs;
+	u32 ocr;
+	struct mmc_card *card;
+
+	BUG_ON(!host);
+	WARN_ON(!host->claimed);
+
+	err = mmc_send_io_op_cond(host, 0, &ocr);
+	if (err)
+		return err;
+
+	mmc_attach_bus(host, &mmc_sdio_ops);
+	if (host->ocr_avail_sdio)
+		host->ocr_avail = host->ocr_avail_sdio;
+
+	/*
+	 * Sanity check the voltages that the card claims to
+	 * support.
+	 */
+	if (ocr & 0x7F) {
+		pr_warning("%s: card claims to support voltages "
+		       "below the defined range. These will be ignored.\n",
+		       mmc_hostname(host));
+		ocr &= ~0x7F;
+	}
+
+	host->ocr = mmc_select_voltage(host, ocr);
+
+	/*
+	 * Can we support the voltage(s) of the card(s)?
+	 */
+	if (!host->ocr) {
+		err = -EINVAL;
+		goto err;
+	}
+
+	/*
+	 * Detect and init the card.
+	 */
+	err = mmc_sdio_init_card(host, host->ocr, NULL, 0);
+	if (err) {
+		if (err == -EAGAIN) {
+			/*
+			 * Retry initialization with S18R set to 0.
+			 */
+			host->ocr &= ~R4_18V_PRESENT;
+			err = mmc_sdio_init_card(host, host->ocr, NULL, 0);
+		}
+		if (err)
+			goto err;
+	}
+	card = host->card;
+
+	/*
+	 * Enable runtime PM only if supported by host+card+board
+	 */
+	if (host->caps & MMC_CAP_POWER_OFF_CARD) {
+		/*
+		 * Let runtime PM core know our card is active
+		 */
+		err = pm_runtime_set_active(&card->dev);
+		if (err)
+			goto remove;
+
+		/*
+		 * Enable runtime PM for this card
+		 */
+		pm_runtime_enable(&card->dev);
+	}
+
+	/*
+	 * The number of functions on the card is encoded inside
+	 * the ocr.
+	 */
+	funcs = (ocr & 0x70000000) >> 28;
+	card->sdio_funcs = 0;
+
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+	if (host->embedded_sdio_data.funcs)
+		card->sdio_funcs = funcs = host->embedded_sdio_data.num_funcs;
+#endif
+
+	/*
+	 * Initialize (but don't add) all present functions.
+	 */
+	for (i = 0; i < funcs; i++, card->sdio_funcs++) {
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+		if (host->embedded_sdio_data.funcs) {
+			struct sdio_func *tmp;
+
+			tmp = sdio_alloc_func(host->card);
+			if (IS_ERR(tmp))
+				goto remove;
+			tmp->num = (i + 1);
+			card->sdio_func[i] = tmp;
+			tmp->class = host->embedded_sdio_data.funcs[i].f_class;
+			tmp->max_blksize = host->embedded_sdio_data.funcs[i].f_maxblksize;
+			tmp->vendor = card->cis.vendor;
+			tmp->device = card->cis.device;
+		} else {
+#endif
+			err = sdio_init_func(host->card, i + 1);
+			if (err)
+				goto remove;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+		}
+#endif
+		/*
+		 * Enable Runtime PM for this func (if supported)
+		 */
+		if (host->caps & MMC_CAP_POWER_OFF_CARD)
+			pm_runtime_enable(&card->sdio_func[i]->dev);
+	}
+
+	/*
+	 * First add the card to the driver model...
+	 */
+	mmc_release_host(host);
+	err = mmc_add_card(host->card);
+	if (err)
+		goto remove_added;
+
+	/*
+	 * ...then the SDIO functions.
+	 */
+	for (i = 0;i < funcs;i++) {
+		err = sdio_add_func(host->card->sdio_func[i]);
+		if (err)
+			goto remove_added;
+	}
+
+	mmc_claim_host(host);
+	return 0;
+
+
+remove_added:
+	/* Remove without lock if the device has been added. */
+	mmc_sdio_remove(host);
+	mmc_claim_host(host);
+remove:
+	/* And with lock if it hasn't been added. */
+	mmc_release_host(host);
+	if (host->card)
+		mmc_sdio_remove(host);
+	mmc_claim_host(host);
+err:
+	mmc_detach_bus(host);
+
+	pr_err("%s: error %d whilst initialising SDIO card\n",
+		mmc_hostname(host), err);
+
+	return err;
+}
+
+int sdio_reset_comm(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+	u32 ocr;
+	int err;
+
+	printk("%s():\n", __func__);
+	mmc_claim_host(host);
+
+	mmc_go_idle(host);
+
+	mmc_set_clock(host, host->f_min);
+
+	err = mmc_send_io_op_cond(host, 0, &ocr);
+	if (err)
+		goto err;
+
+	host->ocr = mmc_select_voltage(host, ocr);
+	if (!host->ocr) {
+		err = -EINVAL;
+		goto err;
+	}
+
+	err = mmc_sdio_init_card(host, host->ocr, card, 0);
+	if (err)
+		goto err;
+
+	mmc_release_host(host);
+	return 0;
+err:
+	printk("%s: Error resetting SDIO communications (%d)\n",
+	       mmc_hostname(host), err);
+	mmc_release_host(host);
+	return err;
+}
+EXPORT_SYMBOL(sdio_reset_comm);
diff --git a/ANDROID_3.4.5/drivers/mmc/core/sdio_bus.c b/ANDROID_3.4.5/drivers/mmc/core/sdio_bus.c
new file mode 100644
index 00000000..56d020e2
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/sdio_bus.c
@@ -0,0 +1,337 @@
+/*
+ *  linux/drivers/mmc/core/sdio_bus.c
+ *
+ *  Copyright 2007 Pierre Ossman
+ *
+ * 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.
+ *
+ * SDIO function driver model
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/sdio_func.h>
+
+#include "sdio_cis.h"
+#include "sdio_bus.h"
+
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+#include <linux/mmc/host.h>
+#endif
+
+/* show configuration fields */
+#define sdio_config_attr(field, format_string)				\
+static ssize_t								\
+field##_show(struct device *dev, struct device_attribute *attr, char *buf)				\
+{									\
+	struct sdio_func *func;						\
+									\
+	func = dev_to_sdio_func (dev);					\
+	return sprintf (buf, format_string, func->field);		\
+}
+
+sdio_config_attr(class, "0x%02x\n");
+sdio_config_attr(vendor, "0x%04x\n");
+sdio_config_attr(device, "0x%04x\n");
+
+static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct sdio_func *func = dev_to_sdio_func (dev);
+
+	return sprintf(buf, "sdio:c%02Xv%04Xd%04X\n",
+			func->class, func->vendor, func->device);
+}
+
+static struct device_attribute sdio_dev_attrs[] = {
+	__ATTR_RO(class),
+	__ATTR_RO(vendor),
+	__ATTR_RO(device),
+	__ATTR_RO(modalias),
+	__ATTR_NULL,
+};
+
+static const struct sdio_device_id *sdio_match_one(struct sdio_func *func,
+	const struct sdio_device_id *id)
+{
+	if (id->class != (__u8)SDIO_ANY_ID && id->class != func->class)
+		return NULL;
+	if (id->vendor != (__u16)SDIO_ANY_ID && id->vendor != func->vendor)
+		return NULL;
+	if (id->device != (__u16)SDIO_ANY_ID && id->device != func->device)
+		return NULL;
+	return id;
+}
+
+static const struct sdio_device_id *sdio_match_device(struct sdio_func *func,
+	struct sdio_driver *sdrv)
+{
+	const struct sdio_device_id *ids;
+
+	ids = sdrv->id_table;
+
+	if (ids) {
+		while (ids->class || ids->vendor || ids->device) {
+			if (sdio_match_one(func, ids))
+				return ids;
+			ids++;
+		}
+	}
+
+	return NULL;
+}
+
+static int sdio_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct sdio_func *func = dev_to_sdio_func(dev);
+	struct sdio_driver *sdrv = to_sdio_driver(drv);
+
+	if (sdio_match_device(func, sdrv))
+		return 1;
+
+	return 0;
+}
+
+static int
+sdio_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+	struct sdio_func *func = dev_to_sdio_func(dev);
+
+	if (add_uevent_var(env,
+			"SDIO_CLASS=%02X", func->class))
+		return -ENOMEM;
+
+	if (add_uevent_var(env, 
+			"SDIO_ID=%04X:%04X", func->vendor, func->device))
+		return -ENOMEM;
+
+	if (add_uevent_var(env,
+			"MODALIAS=sdio:c%02Xv%04Xd%04X",
+			func->class, func->vendor, func->device))
+		return -ENOMEM;
+
+	return 0;
+}
+
+static int sdio_bus_probe(struct device *dev)
+{
+	struct sdio_driver *drv = to_sdio_driver(dev->driver);
+	struct sdio_func *func = dev_to_sdio_func(dev);
+	const struct sdio_device_id *id;
+	int ret;
+
+	id = sdio_match_device(func, drv);
+	if (!id)
+		return -ENODEV;
+
+	/* Unbound SDIO functions are always suspended.
+	 * During probe, the function is set active and the usage count
+	 * is incremented.  If the driver supports runtime PM,
+	 * it should call pm_runtime_put_noidle() in its probe routine and
+	 * pm_runtime_get_noresume() in its remove routine.
+	 */
+	if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD) {
+		ret = pm_runtime_get_sync(dev);
+		if (ret < 0)
+			goto out;
+	}
+
+	/* Set the default block size so the driver is sure it's something
+	 * sensible. */
+	sdio_claim_host(func);
+	ret = sdio_set_block_size(func, 0);
+	sdio_release_host(func);
+	if (ret)
+		goto disable_runtimepm;
+
+	ret = drv->probe(func, id);
+	if (ret)
+		goto disable_runtimepm;
+
+	return 0;
+
+disable_runtimepm:
+	if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD)
+		pm_runtime_put_noidle(dev);
+out:
+	return ret;
+}
+
+static int sdio_bus_remove(struct device *dev)
+{
+	struct sdio_driver *drv = to_sdio_driver(dev->driver);
+	struct sdio_func *func = dev_to_sdio_func(dev);
+	int ret = 0;
+
+	/* Make sure card is powered before invoking ->remove() */
+	if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD)
+		pm_runtime_get_sync(dev);
+
+	drv->remove(func);
+
+	if (func->irq_handler) {
+		pr_warning("WARNING: driver %s did not remove "
+			"its interrupt handler!\n", drv->name);
+		sdio_claim_host(func);
+		sdio_release_irq(func);
+		sdio_release_host(func);
+	}
+
+	/* First, undo the increment made directly above */
+	if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD)
+		pm_runtime_put_noidle(dev);
+
+	/* Then undo the runtime PM settings in sdio_bus_probe() */
+	if (func->card->host->caps & MMC_CAP_POWER_OFF_CARD)
+		pm_runtime_put_sync(dev);
+
+	return ret;
+}
+
+#ifdef CONFIG_PM
+
+static int pm_no_operation(struct device *dev)
+{
+	return 0;
+}
+
+static const struct dev_pm_ops sdio_bus_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_no_operation, pm_no_operation)
+	SET_RUNTIME_PM_OPS(
+		pm_generic_runtime_suspend,
+		pm_generic_runtime_resume,
+		pm_generic_runtime_idle
+	)
+};
+
+#define SDIO_PM_OPS_PTR	(&sdio_bus_pm_ops)
+
+#else /* !CONFIG_PM */
+
+#define SDIO_PM_OPS_PTR	NULL
+
+#endif /* !CONFIG_PM */
+
+static struct bus_type sdio_bus_type = {
+	.name		= "sdio",
+	.dev_attrs	= sdio_dev_attrs,
+	.match		= sdio_bus_match,
+	.uevent		= sdio_bus_uevent,
+	.probe		= sdio_bus_probe,
+	.remove		= sdio_bus_remove,
+	.pm		= SDIO_PM_OPS_PTR,
+};
+
+int sdio_register_bus(void)
+{
+	return bus_register(&sdio_bus_type);
+}
+
+void sdio_unregister_bus(void)
+{
+	bus_unregister(&sdio_bus_type);
+}
+
+/**
+ *	sdio_register_driver - register a function driver
+ *	@drv: SDIO function driver
+ */
+int sdio_register_driver(struct sdio_driver *drv)
+{
+	drv->drv.name = drv->name;
+	drv->drv.bus = &sdio_bus_type;
+	return driver_register(&drv->drv);
+}
+EXPORT_SYMBOL_GPL(sdio_register_driver);
+
+/**
+ *	sdio_unregister_driver - unregister a function driver
+ *	@drv: SDIO function driver
+ */
+void sdio_unregister_driver(struct sdio_driver *drv)
+{
+	drv->drv.bus = &sdio_bus_type;
+	driver_unregister(&drv->drv);
+}
+EXPORT_SYMBOL_GPL(sdio_unregister_driver);
+
+static void sdio_release_func(struct device *dev)
+{
+	struct sdio_func *func = dev_to_sdio_func(dev);
+
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+	/*
+	 * If this device is embedded then we never allocated
+	 * cis tables for this func
+	 */
+	if (!func->card->host->embedded_sdio_data.funcs)
+#endif
+		sdio_free_func_cis(func);
+
+	if (func->info)
+		kfree(func->info);
+
+	kfree(func);
+}
+
+/*
+ * Allocate and initialise a new SDIO function structure.
+ */
+struct sdio_func *sdio_alloc_func(struct mmc_card *card)
+{
+	struct sdio_func *func;
+
+	func = kzalloc(sizeof(struct sdio_func), GFP_KERNEL);
+	if (!func)
+		return ERR_PTR(-ENOMEM);
+
+	func->card = card;
+
+	device_initialize(&func->dev);
+
+	func->dev.parent = &card->dev;
+	func->dev.bus = &sdio_bus_type;
+	func->dev.release = sdio_release_func;
+
+	return func;
+}
+
+/*
+ * Register a new SDIO function with the driver model.
+ */
+int sdio_add_func(struct sdio_func *func)
+{
+	int ret;
+
+	dev_set_name(&func->dev, "%s:%d", mmc_card_id(func->card), func->num);
+
+	ret = device_add(&func->dev);
+	if (ret == 0)
+		sdio_func_set_present(func);
+
+	return ret;
+}
+
+/*
+ * Unregister a SDIO function with the driver model, and
+ * (eventually) free it.
+ * This function can be called through error paths where sdio_add_func() was
+ * never executed (because a failure occurred at an earlier point).
+ */
+void sdio_remove_func(struct sdio_func *func)
+{
+	if (!sdio_func_present(func))
+		return;
+
+	device_del(&func->dev);
+	put_device(&func->dev);
+}
+
diff --git a/ANDROID_3.4.5/drivers/mmc/core/sdio_bus.h b/ANDROID_3.4.5/drivers/mmc/core/sdio_bus.h
new file mode 100644
index 00000000..567a7682
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/sdio_bus.h
@@ -0,0 +1,22 @@
+/*
+ *  linux/drivers/mmc/core/sdio_bus.h
+ *
+ *  Copyright 2007 Pierre Ossman
+ *
+ * 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.
+ */
+#ifndef _MMC_CORE_SDIO_BUS_H
+#define _MMC_CORE_SDIO_BUS_H
+
+struct sdio_func *sdio_alloc_func(struct mmc_card *card);
+int sdio_add_func(struct sdio_func *func);
+void sdio_remove_func(struct sdio_func *func);
+
+int sdio_register_bus(void);
+void sdio_unregister_bus(void);
+
+#endif
+
diff --git a/ANDROID_3.4.5/drivers/mmc/core/sdio_cis.c b/ANDROID_3.4.5/drivers/mmc/core/sdio_cis.c
new file mode 100644
index 00000000..f1c7ed8f
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/sdio_cis.c
@@ -0,0 +1,412 @@
+/*
+ * linux/drivers/mmc/core/sdio_cis.c
+ *
+ * Author:	Nicolas Pitre
+ * Created:	June 11, 2007
+ * Copyright:	MontaVista Software Inc.
+ *
+ * Copyright 2007 Pierre Ossman
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/sdio.h>
+#include <linux/mmc/sdio_func.h>
+
+#include "sdio_cis.h"
+#include "sdio_ops.h"
+
+static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func,
+			 const unsigned char *buf, unsigned size)
+{
+	unsigned i, nr_strings;
+	char **buffer, *string;
+
+	/* Find all null-terminated (including zero length) strings in
+	   the TPLLV1_INFO field. Trailing garbage is ignored. */
+	buf += 2;
+	size -= 2;
+
+	nr_strings = 0;
+	for (i = 0; i < size; i++) {
+		if (buf[i] == 0xff)
+			break;
+		if (buf[i] == 0)
+			nr_strings++;
+	}
+	if (nr_strings == 0)
+		return 0;
+
+	size = i;
+
+	buffer = kzalloc(sizeof(char*) * nr_strings + size, GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
+
+	string = (char*)(buffer + nr_strings);
+
+	for (i = 0; i < nr_strings; i++) {
+		buffer[i] = string;
+		strcpy(string, buf);
+		string += strlen(string) + 1;
+		buf += strlen(buf) + 1;
+	}
+
+	if (func) {
+		func->num_info = nr_strings;
+		func->info = (const char**)buffer;
+	} else {
+		card->num_info = nr_strings;
+		card->info = (const char**)buffer;
+	}
+
+	return 0;
+}
+
+static int cistpl_manfid(struct mmc_card *card, struct sdio_func *func,
+			 const unsigned char *buf, unsigned size)
+{
+	unsigned int vendor, device;
+
+	/* TPLMID_MANF */
+	vendor = buf[0] | (buf[1] << 8);
+
+	/* TPLMID_CARD */
+	device = buf[2] | (buf[3] << 8);
+
+	if (func) {
+		func->vendor = vendor;
+		func->device = device;
+	} else {
+		card->cis.vendor = vendor;
+		card->cis.device = device;
+	}
+
+	return 0;
+}
+
+static const unsigned char speed_val[16] =
+	{ 0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 };
+static const unsigned int speed_unit[8] =
+	{ 10000, 100000, 1000000, 10000000, 0, 0, 0, 0 };
+
+
+typedef int (tpl_parse_t)(struct mmc_card *, struct sdio_func *,
+			   const unsigned char *, unsigned);
+
+struct cis_tpl {
+	unsigned char code;
+	unsigned char min_size;
+	tpl_parse_t *parse;
+};
+
+static int cis_tpl_parse(struct mmc_card *card, struct sdio_func *func,
+			 const char *tpl_descr,
+			 const struct cis_tpl *tpl, int tpl_count,
+			 unsigned char code,
+			 const unsigned char *buf, unsigned size)
+{
+	int i, ret;
+
+	/* look for a matching code in the table */
+	for (i = 0; i < tpl_count; i++, tpl++) {
+		if (tpl->code == code)
+			break;
+	}
+	if (i < tpl_count) {
+		if (size >= tpl->min_size) {
+			if (tpl->parse)
+				ret = tpl->parse(card, func, buf, size);
+			else
+				ret = -EILSEQ;	/* known tuple, not parsed */
+		} else {
+			/* invalid tuple */
+			ret = -EINVAL;
+		}
+		if (ret && ret != -EILSEQ && ret != -ENOENT) {
+			pr_err("%s: bad %s tuple 0x%02x (%u bytes)\n",
+			       mmc_hostname(card->host), tpl_descr, code, size);
+		}
+	} else {
+		/* unknown tuple */
+		ret = -ENOENT;
+	}
+
+	return ret;
+}
+
+static int cistpl_funce_common(struct mmc_card *card, struct sdio_func *func,
+			       const unsigned char *buf, unsigned size)
+{
+	/* Only valid for the common CIS (function 0) */
+	if (func)
+		return -EINVAL;
+
+	/* TPLFE_FN0_BLK_SIZE */
+	card->cis.blksize = buf[1] | (buf[2] << 8);
+
+	/* TPLFE_MAX_TRAN_SPEED */
+	card->cis.max_dtr = speed_val[(buf[3] >> 3) & 15] *
+			    speed_unit[buf[3] & 7];
+
+	return 0;
+}
+
+static int cistpl_funce_func(struct mmc_card *card, struct sdio_func *func,
+			     const unsigned char *buf, unsigned size)
+{
+	unsigned vsn;
+	unsigned min_size;
+
+	/* Only valid for the individual function's CIS (1-7) */
+	if (!func)
+		return -EINVAL;
+
+	/*
+	 * This tuple has a different length depending on the SDIO spec
+	 * version.
+	 */
+	vsn = func->card->cccr.sdio_vsn;
+	min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42;
+
+	if (size < min_size)
+		return -EINVAL;
+
+	/* TPLFE_MAX_BLK_SIZE */
+	func->max_blksize = buf[12] | (buf[13] << 8);
+
+	/* TPLFE_ENABLE_TIMEOUT_VAL, present in ver 1.1 and above */
+	if (vsn > SDIO_SDIO_REV_1_00)
+		func->enable_timeout = (buf[28] | (buf[29] << 8)) * 10;
+	else
+		func->enable_timeout = jiffies_to_msecs(HZ);
+
+	return 0;
+}
+
+/*
+ * Known TPLFE_TYPEs table for CISTPL_FUNCE tuples.
+ *
+ * Note that, unlike PCMCIA, CISTPL_FUNCE tuples are not parsed depending
+ * on the TPLFID_FUNCTION value of the previous CISTPL_FUNCID as on SDIO
+ * TPLFID_FUNCTION is always hardcoded to 0x0C.
+ */
+static const struct cis_tpl cis_tpl_funce_list[] = {
+	{	0x00,	4,	cistpl_funce_common		},
+	{	0x01,	0,	cistpl_funce_func		},
+	{	0x04,	1+1+6,	/* CISTPL_FUNCE_LAN_NODE_ID */	},
+};
+
+static int cistpl_funce(struct mmc_card *card, struct sdio_func *func,
+			const unsigned char *buf, unsigned size)
+{
+	if (size < 1)
+		return -EINVAL;
+
+	return cis_tpl_parse(card, func, "CISTPL_FUNCE",
+			     cis_tpl_funce_list,
+			     ARRAY_SIZE(cis_tpl_funce_list),
+			     buf[0], buf, size);
+}
+
+/* Known TPL_CODEs table for CIS tuples */
+static const struct cis_tpl cis_tpl_list[] = {
+	{	0x15,	3,	cistpl_vers_1		},
+	{	0x20,	4,	cistpl_manfid		},
+	{	0x21,	2,	/* cistpl_funcid */	},
+	{	0x22,	0,	cistpl_funce		},
+};
+
+static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
+{
+	int ret;
+	struct sdio_func_tuple *this, **prev;
+	unsigned i, ptr = 0;
+
+	/*
+	 * Note that this works for the common CIS (function number 0) as
+	 * well as a function's CIS * since SDIO_CCCR_CIS and SDIO_FBR_CIS
+	 * have the same offset.
+	 */
+	for (i = 0; i < 3; i++) {
+		unsigned char x, fn;
+
+		if (func)
+			fn = func->num;
+		else
+			fn = 0;
+
+		ret = mmc_io_rw_direct(card, 0, 0,
+			SDIO_FBR_BASE(fn) + SDIO_FBR_CIS + i, 0, &x);
+		if (ret)
+			return ret;
+		ptr |= x << (i * 8);
+	}
+
+	if (func)
+		prev = &func->tuples;
+	else
+		prev = &card->tuples;
+
+	BUG_ON(*prev);
+
+	do {
+		unsigned char tpl_code, tpl_link;
+
+		ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_code);
+		if (ret)
+			break;
+
+		/* 0xff means we're done */
+		if (tpl_code == 0xff)
+			break;
+
+		/* null entries have no link field or data */
+		if (tpl_code == 0x00)
+			continue;
+
+		ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_link);
+		if (ret)
+			break;
+
+		/* a size of 0xff also means we're done */
+		if (tpl_link == 0xff)
+			break;
+
+		this = kmalloc(sizeof(*this) + tpl_link, GFP_KERNEL);
+		if (!this)
+			return -ENOMEM;
+
+		for (i = 0; i < tpl_link; i++) {
+			ret = mmc_io_rw_direct(card, 0, 0,
+					       ptr + i, 0, &this->data[i]);
+			if (ret)
+				break;
+		}
+		if (ret) {
+			kfree(this);
+			break;
+		}
+
+		/* Try to parse the CIS tuple */
+		ret = cis_tpl_parse(card, func, "CIS",
+				    cis_tpl_list, ARRAY_SIZE(cis_tpl_list),
+				    tpl_code, this->data, tpl_link);
+		if (ret == -EILSEQ || ret == -ENOENT) {
+			/*
+			 * The tuple is unknown or known but not parsed.
+			 * Queue the tuple for the function driver.
+			 */
+			this->next = NULL;
+			this->code = tpl_code;
+			this->size = tpl_link;
+			*prev = this;
+			prev = &this->next;
+
+			if (ret == -ENOENT) {
+				/* warn about unknown tuples */
+				pr_warning("%s: queuing unknown"
+				       " CIS tuple 0x%02x (%u bytes)\n",
+				       mmc_hostname(card->host),
+				       tpl_code, tpl_link);
+			}
+
+			/* keep on analyzing tuples */
+			ret = 0;
+		} else {
+			/*
+			 * We don't need the tuple anymore if it was
+			 * successfully parsed by the SDIO core or if it is
+			 * not going to be queued for a driver.
+			 */
+			kfree(this);
+		}
+
+		ptr += tpl_link;
+	} while (!ret);
+
+	/*
+	 * Link in all unknown tuples found in the common CIS so that
+	 * drivers don't have to go digging in two places.
+	 */
+	if (func)
+		*prev = card->tuples;
+
+	return ret;
+}
+
+int sdio_read_common_cis(struct mmc_card *card)
+{
+	return sdio_read_cis(card, NULL);
+}
+
+void sdio_free_common_cis(struct mmc_card *card)
+{
+	struct sdio_func_tuple *tuple, *victim;
+
+	tuple = card->tuples;
+
+	while (tuple) {
+		victim = tuple;
+		tuple = tuple->next;
+		kfree(victim);
+	}
+
+	card->tuples = NULL;
+}
+
+int sdio_read_func_cis(struct sdio_func *func)
+{
+	int ret;
+
+	ret = sdio_read_cis(func->card, func);
+	if (ret)
+		return ret;
+
+	/*
+	 * Since we've linked to tuples in the card structure,
+	 * we must make sure we have a reference to it.
+	 */
+	get_device(&func->card->dev);
+
+	/*
+	 * Vendor/device id is optional for function CIS, so
+	 * copy it from the card structure as needed.
+	 */
+	if (func->vendor == 0) {
+		func->vendor = func->card->cis.vendor;
+		func->device = func->card->cis.device;
+	}
+
+	return 0;
+}
+
+void sdio_free_func_cis(struct sdio_func *func)
+{
+	struct sdio_func_tuple *tuple, *victim;
+
+	tuple = func->tuples;
+
+	while (tuple && tuple != func->card->tuples) {
+		victim = tuple;
+		tuple = tuple->next;
+		kfree(victim);
+	}
+
+	func->tuples = NULL;
+
+	/*
+	 * We have now removed the link to the tuples in the
+	 * card structure, so remove the reference.
+	 */
+	put_device(&func->card->dev);
+}
+
diff --git a/ANDROID_3.4.5/drivers/mmc/core/sdio_cis.h b/ANDROID_3.4.5/drivers/mmc/core/sdio_cis.h
new file mode 100644
index 00000000..4d903c2e
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/sdio_cis.h
@@ -0,0 +1,23 @@
+/*
+ * linux/drivers/mmc/core/sdio_cis.h
+ *
+ * Author:	Nicolas Pitre
+ * Created:	June 11, 2007
+ * Copyright:	MontaVista Software Inc.
+ *
+ * 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.
+ */
+
+#ifndef _MMC_SDIO_CIS_H
+#define _MMC_SDIO_CIS_H
+
+int sdio_read_common_cis(struct mmc_card *card);
+void sdio_free_common_cis(struct mmc_card *card);
+
+int sdio_read_func_cis(struct sdio_func *func);
+void sdio_free_func_cis(struct sdio_func *func);
+
+#endif
diff --git a/ANDROID_3.4.5/drivers/mmc/core/sdio_io.c b/ANDROID_3.4.5/drivers/mmc/core/sdio_io.c
new file mode 100755
index 00000000..01fa6e86
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/sdio_io.c
@@ -0,0 +1,759 @@
+/*
+ *  linux/drivers/mmc/core/sdio_io.c
+ *
+ *  Copyright 2007-2008 Pierre Ossman
+ *
+ * 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.
+ */
+
+#include <linux/export.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/sdio.h>
+#include <linux/mmc/sdio_func.h>
+
+#include "sdio_ops.h"
+
+/**
+ *	sdio_claim_host - exclusively claim a bus for a certain SDIO function
+ *	@func: SDIO function that will be accessed
+ *
+ *	Claim a bus for a set of operations. The SDIO function given
+ *	is used to figure out which bus is relevant.
+ */
+void sdio_claim_host(struct sdio_func *func)
+{
+	BUG_ON(!func);
+	BUG_ON(!func->card);
+
+	mmc_claim_host(func->card->host);
+}
+EXPORT_SYMBOL_GPL(sdio_claim_host);
+
+/**
+ *	sdio_release_host - release a bus for a certain SDIO function
+ *	@func: SDIO function that was accessed
+ *
+ *	Release a bus, allowing others to claim the bus for their
+ *	operations.
+ */
+void sdio_release_host(struct sdio_func *func)
+{
+	BUG_ON(!func);
+	BUG_ON(!func->card);
+
+	mmc_release_host(func->card->host);
+}
+EXPORT_SYMBOL_GPL(sdio_release_host);
+
+/**
+ *	sdio_enable_func - enables a SDIO function for usage
+ *	@func: SDIO function to enable
+ *
+ *	Powers up and activates a SDIO function so that register
+ *	access is possible.
+ */
+int sdio_enable_func(struct sdio_func *func)
+{
+	int ret;
+	unsigned char reg;
+	unsigned long timeout;
+
+	BUG_ON(!func);
+	BUG_ON(!func->card);
+
+	pr_debug("SDIO: Enabling device %s...\n", sdio_func_id(func));
+
+	ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IOEx, 0, &reg);
+	if (ret)
+		goto err;
+
+	reg |= 1 << func->num;
+
+	ret = mmc_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IOEx, reg, NULL);
+	if (ret)
+		goto err;
+
+	timeout = jiffies + msecs_to_jiffies(func->enable_timeout);
+
+	while (1) {
+		ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IORx, 0, &reg);
+		if (ret)
+			goto err;
+		if (reg & (1 << func->num))
+			break;
+		ret = -ETIME;
+		if (time_after(jiffies, timeout))
+			goto err;
+	}
+
+	pr_debug("SDIO: Enabled device %s\n", sdio_func_id(func));
+
+	return 0;
+
+err:
+	pr_debug("SDIO: Failed to enable device %s\n", sdio_func_id(func));
+	return ret;
+}
+EXPORT_SYMBOL_GPL(sdio_enable_func);
+
+/**
+ *	sdio_disable_func - disable a SDIO function
+ *	@func: SDIO function to disable
+ *
+ *	Powers down and deactivates a SDIO function. Register access
+ *	to this function will fail until the function is reenabled.
+ */
+int sdio_disable_func(struct sdio_func *func)
+{
+	int ret;
+	unsigned char reg;
+
+	BUG_ON(!func);
+	BUG_ON(!func->card);
+
+	pr_debug("SDIO: Disabling device %s...\n", sdio_func_id(func));
+
+	ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IOEx, 0, &reg);
+	if (ret)
+		goto err;
+
+	reg &= ~(1 << func->num);
+
+	ret = mmc_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IOEx, reg, NULL);
+	if (ret)
+		goto err;
+
+	pr_debug("SDIO: Disabled device %s\n", sdio_func_id(func));
+
+	return 0;
+
+err:
+	pr_debug("SDIO: Failed to disable device %s\n", sdio_func_id(func));
+	return -EIO;
+}
+EXPORT_SYMBOL_GPL(sdio_disable_func);
+
+/**
+ *	sdio_set_block_size - set the block size of an SDIO function
+ *	@func: SDIO function to change
+ *	@blksz: new block size or 0 to use the default.
+ *
+ *	The default block size is the largest supported by both the function
+ *	and the host, with a maximum of 512 to ensure that arbitrarily sized
+ *	data transfer use the optimal (least) number of commands.
+ *
+ *	A driver may call this to override the default block size set by the
+ *	core. This can be used to set a block size greater than the maximum
+ *	that reported by the card; it is the driver's responsibility to ensure
+ *	it uses a value that the card supports.
+ *
+ *	Returns 0 on success, -EINVAL if the host does not support the
+ *	requested block size, or -EIO (etc.) if one of the resultant FBR block
+ *	size register writes failed.
+ *
+ */
+int sdio_set_block_size(struct sdio_func *func, unsigned blksz)
+{
+	int ret;
+
+	if (blksz > func->card->host->max_blk_size)
+		return -EINVAL;
+
+	if (blksz == 0) {
+		blksz = min(func->max_blksize, func->card->host->max_blk_size);
+		blksz = min(blksz, 512u);
+	}
+
+	ret = mmc_io_rw_direct(func->card, 1, 0,
+		SDIO_FBR_BASE(func->num) + SDIO_FBR_BLKSIZE,
+		blksz & 0xff, NULL);
+	if (ret)
+		return ret;
+	ret = mmc_io_rw_direct(func->card, 1, 0,
+		SDIO_FBR_BASE(func->num) + SDIO_FBR_BLKSIZE + 1,
+		(blksz >> 8) & 0xff, NULL);
+	if (ret)
+		return ret;
+	func->cur_blksize = blksz;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(sdio_set_block_size);
+
+/*
+ * Calculate the maximum byte mode transfer size
+ */
+static inline unsigned int sdio_max_byte_size(struct sdio_func *func)
+{
+	unsigned mval =	min(func->card->host->max_seg_size,
+			    func->card->host->max_blk_size);
+
+	if (mmc_blksz_for_byte_mode(func->card))
+		mval = min(mval, func->cur_blksize);
+	else
+		mval = min(mval, func->max_blksize);
+
+	if (mmc_card_broken_byte_mode_512(func->card))
+		return min(mval, 511u);
+
+	return min(mval, 512u); /* maximum size for byte mode */
+}
+
+/**
+ *	sdio_align_size - pads a transfer size to a more optimal value
+ *	@func: SDIO function
+ *	@sz: original transfer size
+ *
+ *	Pads the original data size with a number of extra bytes in
+ *	order to avoid controller bugs and/or performance hits
+ *	(e.g. some controllers revert to PIO for certain sizes).
+ *
+ *	If possible, it will also adjust the size so that it can be
+ *	handled in just a single request.
+ *
+ *	Returns the improved size, which might be unmodified.
+ */
+unsigned int sdio_align_size(struct sdio_func *func, unsigned int sz)
+{
+	unsigned int orig_sz;
+	unsigned int blk_sz, byte_sz;
+	unsigned chunk_sz;
+
+	orig_sz = sz;
+
+	/*
+	 * Do a first check with the controller, in case it
+	 * wants to increase the size up to a point where it
+	 * might need more than one block.
+	 */
+	sz = mmc_align_data_size(func->card, sz);
+
+	/*
+	 * If we can still do this with just a byte transfer, then
+	 * we're done.
+	 */
+	if (sz <= sdio_max_byte_size(func))
+		return sz;
+
+	if (func->card->cccr.multi_block) {
+		/*
+		 * Check if the transfer is already block aligned
+		 */
+		if ((sz % func->cur_blksize) == 0)
+			return sz;
+
+		/*
+		 * Realign it so that it can be done with one request,
+		 * and recheck if the controller still likes it.
+		 */
+		blk_sz = ((sz + func->cur_blksize - 1) /
+			func->cur_blksize) * func->cur_blksize;
+		blk_sz = mmc_align_data_size(func->card, blk_sz);
+
+		/*
+		 * This value is only good if it is still just
+		 * one request.
+		 */
+		if ((blk_sz % func->cur_blksize) == 0)
+			return blk_sz;
+
+		/*
+		 * We failed to do one request, but at least try to
+		 * pad the remainder properly.
+		 */
+		byte_sz = mmc_align_data_size(func->card,
+				sz % func->cur_blksize);
+		if (byte_sz <= sdio_max_byte_size(func)) {
+			blk_sz = sz / func->cur_blksize;
+			return blk_sz * func->cur_blksize + byte_sz;
+		}
+	} else {
+		/*
+		 * We need multiple requests, so first check that the
+		 * controller can handle the chunk size;
+		 */
+		chunk_sz = mmc_align_data_size(func->card,
+				sdio_max_byte_size(func));
+		if (chunk_sz == sdio_max_byte_size(func)) {
+			/*
+			 * Fix up the size of the remainder (if any)
+			 */
+			byte_sz = orig_sz % chunk_sz;
+			if (byte_sz) {
+				byte_sz = mmc_align_data_size(func->card,
+						byte_sz);
+			}
+
+			return (orig_sz / chunk_sz) * chunk_sz + byte_sz;
+		}
+	}
+
+	/*
+	 * The controller is simply incapable of transferring the size
+	 * we want in decent manner, so just return the original size.
+	 */
+	return orig_sz;
+}
+EXPORT_SYMBOL_GPL(sdio_align_size);
+
+/* Split an arbitrarily sized data transfer into several
+ * IO_RW_EXTENDED commands. */
+static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
+	unsigned addr, int incr_addr, u8 *buf, unsigned size)
+{
+	unsigned remainder = size;
+	unsigned max_blocks;
+	int ret;
+
+	/* Do the bulk of the transfer using block mode (if supported). */
+	if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
+		/* Blocks per command is limited by host count, host transfer
+		 * size (we only use a single sg entry) and the maximum for
+		 * IO_RW_EXTENDED of 511 blocks. */
+		max_blocks = min(func->card->host->max_blk_count,
+			func->card->host->max_seg_size / func->cur_blksize);
+		max_blocks = min(max_blocks, 511u);
+
+		while (remainder >= func->cur_blksize) {
+			unsigned blocks;
+
+			blocks = remainder / func->cur_blksize;
+			if (blocks > max_blocks)
+				blocks = max_blocks;
+			size = blocks * func->cur_blksize;
+
+			ret = mmc_io_rw_extended(func->card, write,
+				func->num, addr, incr_addr, buf,
+				blocks, func->cur_blksize);
+			if (ret)
+				return ret;
+
+			remainder -= size;
+			buf += size;
+			if (incr_addr)
+				addr += size;
+		}
+	}
+
+	/* Write the remainder using byte mode. */
+	while (remainder > 0) {
+		size = min(remainder, sdio_max_byte_size(func));
+
+		/* Indicate byte mode by setting "blocks" = 0 */
+		ret = mmc_io_rw_extended(func->card, write, func->num, addr,
+			 incr_addr, buf, 0, size);
+		if (ret)
+			return ret;
+
+		remainder -= size;
+		buf += size;
+		if (incr_addr)
+			addr += size;
+	}
+	return 0;
+}
+
+/**
+ *	sdio_readb - read a single byte from a SDIO function
+ *	@func: SDIO function to access
+ *	@addr: address to read
+ *	@err_ret: optional status value from transfer
+ *
+ *	Reads a single byte from the address space of a given SDIO
+ *	function. If there is a problem reading the address, 0xff
+ *	is returned and @err_ret will contain the error code.
+ */
+u8 sdio_readb(struct sdio_func *func, unsigned int addr, int *err_ret)
+{
+	int ret;
+	u8 val;
+
+	BUG_ON(!func);
+
+	if (err_ret)
+		*err_ret = 0;
+
+	ret = mmc_io_rw_direct(func->card, 0, func->num, addr, 0, &val);
+	if (ret) {
+		if (err_ret)
+			*err_ret = ret;
+		return 0xFF;
+	}
+
+	return val;
+}
+EXPORT_SYMBOL_GPL(sdio_readb);
+
+/**
+ *	sdio_readb_ext - read a single byte from a SDIO function
+ *	@func: SDIO function to access
+ *	@addr: address to read
+ *	@err_ret: optional status value from transfer
+ *	@in: value to add to argument
+ *
+ *	Reads a single byte from the address space of a given SDIO
+ *	function. If there is a problem reading the address, 0xff
+ *	is returned and @err_ret will contain the error code.
+ */
+unsigned char sdio_readb_ext(struct sdio_func *func, unsigned int addr,
+	int *err_ret, unsigned in)
+{
+	int ret;
+	unsigned char val;
+
+	BUG_ON(!func);
+
+	if (err_ret)
+		*err_ret = 0;
+
+	ret = mmc_io_rw_direct(func->card, 0, func->num, addr, (u8)in, &val);
+	if (ret) {
+		if (err_ret)
+			*err_ret = ret;
+		return 0xFF;
+	}
+
+	return val;
+}
+EXPORT_SYMBOL_GPL(sdio_readb_ext);
+
+/**
+ *	sdio_writeb - write a single byte to a SDIO function
+ *	@func: SDIO function to access
+ *	@b: byte to write
+ *	@addr: address to write to
+ *	@err_ret: optional status value from transfer
+ *
+ *	Writes a single byte to the address space of a given SDIO
+ *	function. @err_ret will contain the status of the actual
+ *	transfer.
+ */
+void sdio_writeb(struct sdio_func *func, u8 b, unsigned int addr, int *err_ret)
+{
+	int ret;
+
+	BUG_ON(!func);
+
+	ret = mmc_io_rw_direct(func->card, 1, func->num, addr, b, NULL);
+	if (err_ret)
+		*err_ret = ret;
+}
+EXPORT_SYMBOL_GPL(sdio_writeb);
+
+/**
+ *	sdio_writeb_readb - write and read a byte from SDIO function
+ *	@func: SDIO function to access
+ *	@write_byte: byte to write
+ *	@addr: address to write to
+ *	@err_ret: optional status value from transfer
+ *
+ *	Performs a RAW (Read after Write) operation as defined by SDIO spec -
+ *	single byte is written to address space of a given SDIO function and
+ *	response is read back from the same address, both using single request.
+ *	If there is a problem with the operation, 0xff is returned and
+ *	@err_ret will contain the error code.
+ */
+u8 sdio_writeb_readb(struct sdio_func *func, u8 write_byte,
+	unsigned int addr, int *err_ret)
+{
+	int ret;
+	u8 val;
+
+	ret = mmc_io_rw_direct(func->card, 1, func->num, addr,
+			write_byte, &val);
+	if (err_ret)
+		*err_ret = ret;
+	if (ret)
+		val = 0xff;
+
+	return val;
+}
+EXPORT_SYMBOL_GPL(sdio_writeb_readb);
+
+/**
+ *	sdio_memcpy_fromio - read a chunk of memory from a SDIO function
+ *	@func: SDIO function to access
+ *	@dst: buffer to store the data
+ *	@addr: address to begin reading from
+ *	@count: number of bytes to read
+ *
+ *	Reads from the address space of a given SDIO function. Return
+ *	value indicates if the transfer succeeded or not.
+ */
+int sdio_memcpy_fromio(struct sdio_func *func, void *dst,
+	unsigned int addr, int count)
+{
+	return sdio_io_rw_ext_helper(func, 0, addr, 1, dst, count);
+}
+EXPORT_SYMBOL_GPL(sdio_memcpy_fromio);
+
+/**
+ *	sdio_memcpy_toio - write a chunk of memory to a SDIO function
+ *	@func: SDIO function to access
+ *	@addr: address to start writing to
+ *	@src: buffer that contains the data to write
+ *	@count: number of bytes to write
+ *
+ *	Writes to the address space of a given SDIO function. Return
+ *	value indicates if the transfer succeeded or not.
+ */
+int sdio_memcpy_toio(struct sdio_func *func, unsigned int addr,
+	void *src, int count)
+{
+	return sdio_io_rw_ext_helper(func, 1, addr, 1, src, count);
+}
+EXPORT_SYMBOL_GPL(sdio_memcpy_toio);
+
+/**
+ *	sdio_readsb - read from a FIFO on a SDIO function
+ *	@func: SDIO function to access
+ *	@dst: buffer to store the data
+ *	@addr: address of (single byte) FIFO
+ *	@count: number of bytes to read
+ *
+ *	Reads from the specified FIFO of a given SDIO function. Return
+ *	value indicates if the transfer succeeded or not.
+ */
+int sdio_readsb(struct sdio_func *func, void *dst, unsigned int addr,
+	int count)
+{
+	return sdio_io_rw_ext_helper(func, 0, addr, 0, dst, count);
+}
+EXPORT_SYMBOL_GPL(sdio_readsb);
+
+/**
+ *	sdio_writesb - write to a FIFO of a SDIO function
+ *	@func: SDIO function to access
+ *	@addr: address of (single byte) FIFO
+ *	@src: buffer that contains the data to write
+ *	@count: number of bytes to write
+ *
+ *	Writes to the specified FIFO of a given SDIO function. Return
+ *	value indicates if the transfer succeeded or not.
+ */
+int sdio_writesb(struct sdio_func *func, unsigned int addr, void *src,
+	int count)
+{
+	return sdio_io_rw_ext_helper(func, 1, addr, 0, src, count);
+}
+EXPORT_SYMBOL_GPL(sdio_writesb);
+
+/**
+ *	sdio_readw - read a 16 bit integer from a SDIO function
+ *	@func: SDIO function to access
+ *	@addr: address to read
+ *	@err_ret: optional status value from transfer
+ *
+ *	Reads a 16 bit integer from the address space of a given SDIO
+ *	function. If there is a problem reading the address, 0xffff
+ *	is returned and @err_ret will contain the error code.
+ */
+u16 sdio_readw(struct sdio_func *func, unsigned int addr, int *err_ret)
+{
+	int ret;
+
+	if (err_ret)
+		*err_ret = 0;
+
+	ret = sdio_memcpy_fromio(func, func->tmpbuf, addr, 2);
+	if (ret) {
+		if (err_ret)
+			*err_ret = ret;
+		return 0xFFFF;
+	}
+
+	return le16_to_cpup((__le16 *)func->tmpbuf);
+}
+EXPORT_SYMBOL_GPL(sdio_readw);
+
+/**
+ *	sdio_writew - write a 16 bit integer to a SDIO function
+ *	@func: SDIO function to access
+ *	@b: integer to write
+ *	@addr: address to write to
+ *	@err_ret: optional status value from transfer
+ *
+ *	Writes a 16 bit integer to the address space of a given SDIO
+ *	function. @err_ret will contain the status of the actual
+ *	transfer.
+ */
+void sdio_writew(struct sdio_func *func, u16 b, unsigned int addr, int *err_ret)
+{
+	int ret;
+
+	*(__le16 *)func->tmpbuf = cpu_to_le16(b);
+
+	ret = sdio_memcpy_toio(func, addr, func->tmpbuf, 2);
+	if (err_ret)
+		*err_ret = ret;
+}
+EXPORT_SYMBOL_GPL(sdio_writew);
+
+/**
+ *	sdio_readl - read a 32 bit integer from a SDIO function
+ *	@func: SDIO function to access
+ *	@addr: address to read
+ *	@err_ret: optional status value from transfer
+ *
+ *	Reads a 32 bit integer from the address space of a given SDIO
+ *	function. If there is a problem reading the address,
+ *	0xffffffff is returned and @err_ret will contain the error
+ *	code.
+ */
+u32 sdio_readl(struct sdio_func *func, unsigned int addr, int *err_ret)
+{
+	int ret;
+
+	if (err_ret)
+		*err_ret = 0;
+
+	ret = sdio_memcpy_fromio(func, func->tmpbuf, addr, 4);
+	if (ret) {
+		if (err_ret)
+			*err_ret = ret;
+		return 0xFFFFFFFF;
+	}
+
+	return le32_to_cpup((__le32 *)func->tmpbuf);
+}
+EXPORT_SYMBOL_GPL(sdio_readl);
+
+/**
+ *	sdio_writel - write a 32 bit integer to a SDIO function
+ *	@func: SDIO function to access
+ *	@b: integer to write
+ *	@addr: address to write to
+ *	@err_ret: optional status value from transfer
+ *
+ *	Writes a 32 bit integer to the address space of a given SDIO
+ *	function. @err_ret will contain the status of the actual
+ *	transfer.
+ */
+void sdio_writel(struct sdio_func *func, u32 b, unsigned int addr, int *err_ret)
+{
+	int ret;
+
+	*(__le32 *)func->tmpbuf = cpu_to_le32(b);
+
+	ret = sdio_memcpy_toio(func, addr, func->tmpbuf, 4);
+	if (err_ret)
+		*err_ret = ret;
+}
+EXPORT_SYMBOL_GPL(sdio_writel);
+
+/**
+ *	sdio_f0_readb - read a single byte from SDIO function 0
+ *	@func: an SDIO function of the card
+ *	@addr: address to read
+ *	@err_ret: optional status value from transfer
+ *
+ *	Reads a single byte from the address space of SDIO function 0.
+ *	If there is a problem reading the address, 0xff is returned
+ *	and @err_ret will contain the error code.
+ */
+unsigned char sdio_f0_readb(struct sdio_func *func, unsigned int addr,
+	int *err_ret)
+{
+	int ret;
+	unsigned char val;
+
+	BUG_ON(!func);
+
+	if (err_ret)
+		*err_ret = 0;
+
+	ret = mmc_io_rw_direct(func->card, 0, 0, addr, 0, &val);
+	if (ret) {
+		if (err_ret)
+			*err_ret = ret;
+		return 0xFF;
+	}
+
+	return val;
+}
+EXPORT_SYMBOL_GPL(sdio_f0_readb);
+
+/**
+ *	sdio_f0_writeb - write a single byte to SDIO function 0
+ *	@func: an SDIO function of the card
+ *	@b: byte to write
+ *	@addr: address to write to
+ *	@err_ret: optional status value from transfer
+ *
+ *	Writes a single byte to the address space of SDIO function 0.
+ *	@err_ret will contain the status of the actual transfer.
+ *
+ *	Only writes to the vendor specific CCCR registers (0xF0 -
+ *	0xFF) are permiited; @err_ret will be set to -EINVAL for *
+ *	writes outside this range.
+ */
+void sdio_f0_writeb(struct sdio_func *func, unsigned char b, unsigned int addr,
+	int *err_ret)
+{
+	int ret;
+
+	BUG_ON(!func);
+
+	if ((addr < 0xF0 || addr > 0xFF) && (!mmc_card_lenient_fn0(func->card))) {
+		if (err_ret)
+			*err_ret = -EINVAL;
+		return;
+	}
+
+	ret = mmc_io_rw_direct(func->card, 1, 0, addr, b, NULL);
+	if (err_ret)
+		*err_ret = ret;
+}
+EXPORT_SYMBOL_GPL(sdio_f0_writeb);
+
+/**
+ *	sdio_get_host_pm_caps - get host power management capabilities
+ *	@func: SDIO function attached to host
+ *
+ *	Returns a capability bitmask corresponding to power management
+ *	features supported by the host controller that the card function
+ *	might rely upon during a system suspend.  The host doesn't need
+ *	to be claimed, nor the function active, for this information to be
+ *	obtained.
+ */
+mmc_pm_flag_t sdio_get_host_pm_caps(struct sdio_func *func)
+{
+	BUG_ON(!func);
+	BUG_ON(!func->card);
+
+	return func->card->host->pm_caps;
+}
+EXPORT_SYMBOL_GPL(sdio_get_host_pm_caps);
+
+/**
+ *	sdio_set_host_pm_flags - set wanted host power management capabilities
+ *	@func: SDIO function attached to host
+ *
+ *	Set a capability bitmask corresponding to wanted host controller
+ *	power management features for the upcoming suspend state.
+ *	This must be called, if needed, each time the suspend method of
+ *	the function driver is called, and must contain only bits that
+ *	were returned by sdio_get_host_pm_caps().
+ *	The host doesn't need to be claimed, nor the function active,
+ *	for this information to be set.
+ */
+int sdio_set_host_pm_flags(struct sdio_func *func, mmc_pm_flag_t flags)
+{
+	struct mmc_host *host;
+
+	BUG_ON(!func);
+	BUG_ON(!func->card);
+
+	host = func->card->host;
+
+	if (flags & ~host->pm_caps)
+		return -EINVAL;
+
+	/* function suspend methods are serialized, hence no lock needed */
+	host->pm_flags |= flags;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(sdio_set_host_pm_flags);
diff --git a/ANDROID_3.4.5/drivers/mmc/core/sdio_irq.c b/ANDROID_3.4.5/drivers/mmc/core/sdio_irq.c
new file mode 100644
index 00000000..3d8ceb40
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/sdio_irq.c
@@ -0,0 +1,314 @@
+/*
+ * linux/drivers/mmc/core/sdio_irq.c
+ *
+ * Author:      Nicolas Pitre
+ * Created:     June 18, 2007
+ * Copyright:   MontaVista Software Inc.
+ *
+ * Copyright 2008 Pierre Ossman
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/kthread.h>
+#include <linux/export.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+
+#include <linux/mmc/core.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/sdio.h>
+#include <linux/mmc/sdio_func.h>
+
+#include "sdio_ops.h"
+
+static int process_sdio_pending_irqs(struct mmc_host *host)
+{
+	struct mmc_card *card = host->card;
+	int i, ret, count;
+	unsigned char pending;
+	struct sdio_func *func;
+
+	/*
+	 * Optimization, if there is only 1 function interrupt registered
+	 * and we know an IRQ was signaled then call irq handler directly.
+	 * Otherwise do the full probe.
+	 */
+	func = card->sdio_single_irq;
+	if (func && host->sdio_irq_pending) {
+		func->irq_handler(func);
+		return 1;
+	}
+
+	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_INTx, 0, &pending);
+	if (ret) {
+		pr_debug("%s: error %d reading SDIO_CCCR_INTx\n",
+		       mmc_card_id(card), ret);
+		return ret;
+	}
+
+	count = 0;
+	for (i = 1; i <= 7; i++) {
+		if (pending & (1 << i)) {
+			func = card->sdio_func[i - 1];
+			if (!func) {
+				pr_warning("%s: pending IRQ for "
+					"non-existent function\n",
+					mmc_card_id(card));
+				ret = -EINVAL;
+			} else if (func->irq_handler) {
+				func->irq_handler(func);
+				count++;
+			} else {
+				pr_warning("%s: pending IRQ with no handler\n",
+				       sdio_func_id(func));
+				ret = -EINVAL;
+			}
+		}
+	}
+
+	if (count)
+		return count;
+
+	return ret;
+}
+
+static int sdio_irq_thread(void *_host)
+{
+	struct mmc_host *host = _host;
+	struct sched_param param = { .sched_priority = 1 };
+	unsigned long period, idle_period;
+	int ret;
+
+	sched_setscheduler(current, SCHED_FIFO, &param);
+
+	/*
+	 * We want to allow for SDIO cards to work even on non SDIO
+	 * aware hosts.  One thing that non SDIO host cannot do is
+	 * asynchronous notification of pending SDIO card interrupts
+	 * hence we poll for them in that case.
+	 */
+	idle_period = msecs_to_jiffies(10);
+	period = (host->caps & MMC_CAP_SDIO_IRQ) ?
+		MAX_SCHEDULE_TIMEOUT : idle_period;
+
+	pr_debug("%s: IRQ thread started (poll period = %lu jiffies)\n",
+		 mmc_hostname(host), period);
+
+	do {
+		/*
+		 * We claim the host here on drivers behalf for a couple
+		 * reasons:
+		 *
+		 * 1) it is already needed to retrieve the CCCR_INTx;
+		 * 2) we want the driver(s) to clear the IRQ condition ASAP;
+		 * 3) we need to control the abort condition locally.
+		 *
+		 * Just like traditional hard IRQ handlers, we expect SDIO
+		 * IRQ handlers to be quick and to the point, so that the
+		 * holding of the host lock does not cover too much work
+		 * that doesn't require that lock to be held.
+		 */
+		ret = __mmc_claim_host(host, &host->sdio_irq_thread_abort);
+		if (ret)
+			break;
+		ret = process_sdio_pending_irqs(host);
+		host->sdio_irq_pending = false;
+		mmc_release_host(host);
+
+		/*
+		 * Give other threads a chance to run in the presence of
+		 * errors.
+		 */
+		if (ret < 0) {
+			set_current_state(TASK_INTERRUPTIBLE);
+			if (!kthread_should_stop())
+				schedule_timeout(HZ);
+			set_current_state(TASK_RUNNING);
+		}
+
+		/*
+		 * Adaptive polling frequency based on the assumption
+		 * that an interrupt will be closely followed by more.
+		 * This has a substantial benefit for network devices.
+		 */
+		if (!(host->caps & MMC_CAP_SDIO_IRQ)) {
+			if (ret > 0)
+				period /= 2;
+			else {
+				period++;
+				if (period > idle_period)
+					period = idle_period;
+			}
+		}
+
+		set_current_state(TASK_INTERRUPTIBLE);
+		if (host->caps & MMC_CAP_SDIO_IRQ) {
+			mmc_host_clk_hold(host);
+			host->ops->enable_sdio_irq(host, 1);
+			mmc_host_clk_release(host);
+		}
+		if (!kthread_should_stop())
+			schedule_timeout(period);
+		set_current_state(TASK_RUNNING);
+	} while (!kthread_should_stop());
+
+	if (host->caps & MMC_CAP_SDIO_IRQ) {
+		mmc_host_clk_hold(host);
+		host->ops->enable_sdio_irq(host, 0);
+		mmc_host_clk_release(host);
+	}
+
+	pr_debug("%s: IRQ thread exiting with code %d\n",
+		 mmc_hostname(host), ret);
+
+	return ret;
+}
+
+static int sdio_card_irq_get(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+
+	WARN_ON(!host->claimed);
+
+	if (!host->sdio_irqs++) {
+		atomic_set(&host->sdio_irq_thread_abort, 0);
+		host->sdio_irq_thread =
+			kthread_run(sdio_irq_thread, host, "ksdioirqd/%s",
+				mmc_hostname(host));
+		if (IS_ERR(host->sdio_irq_thread)) {
+			int err = PTR_ERR(host->sdio_irq_thread);
+			host->sdio_irqs--;
+			return err;
+		}
+	}
+
+	return 0;
+}
+
+static int sdio_card_irq_put(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+
+	WARN_ON(!host->claimed);
+	BUG_ON(host->sdio_irqs < 1);
+
+	if (!--host->sdio_irqs) {
+		atomic_set(&host->sdio_irq_thread_abort, 1);
+		kthread_stop(host->sdio_irq_thread);
+	}
+
+	return 0;
+}
+
+/* If there is only 1 function registered set sdio_single_irq */
+static void sdio_single_irq_set(struct mmc_card *card)
+{
+	struct sdio_func *func;
+	int i;
+
+	card->sdio_single_irq = NULL;
+	if ((card->host->caps & MMC_CAP_SDIO_IRQ) &&
+	    card->host->sdio_irqs == 1)
+		for (i = 0; i < card->sdio_funcs; i++) {
+		       func = card->sdio_func[i];
+		       if (func && func->irq_handler) {
+			       card->sdio_single_irq = func;
+			       break;
+		       }
+	       }
+}
+
+/**
+ *	sdio_claim_irq - claim the IRQ for a SDIO function
+ *	@func: SDIO function
+ *	@handler: IRQ handler callback
+ *
+ *	Claim and activate the IRQ for the given SDIO function. The provided
+ *	handler will be called when that IRQ is asserted.  The host is always
+ *	claimed already when the handler is called so the handler must not
+ *	call sdio_claim_host() nor sdio_release_host().
+ */
+int sdio_claim_irq(struct sdio_func *func, sdio_irq_handler_t *handler)
+{
+	int ret;
+	unsigned char reg;
+
+	BUG_ON(!func);
+	BUG_ON(!func->card);
+
+	pr_debug("SDIO: Enabling IRQ for %s...\n", sdio_func_id(func));
+
+	if (func->irq_handler) {
+		pr_debug("SDIO: IRQ for %s already in use.\n", sdio_func_id(func));
+		return -EBUSY;
+	}
+
+	ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IENx, 0, &reg);
+	if (ret)
+		return ret;
+
+	reg |= 1 << func->num;
+
+	reg |= 1; /* Master interrupt enable */
+
+	ret = mmc_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IENx, reg, NULL);
+	if (ret)
+		return ret;
+
+	func->irq_handler = handler;
+	ret = sdio_card_irq_get(func->card);
+	if (ret)
+		func->irq_handler = NULL;
+	sdio_single_irq_set(func->card);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(sdio_claim_irq);
+
+/**
+ *	sdio_release_irq - release the IRQ for a SDIO function
+ *	@func: SDIO function
+ *
+ *	Disable and release the IRQ for the given SDIO function.
+ */
+int sdio_release_irq(struct sdio_func *func)
+{
+	int ret;
+	unsigned char reg;
+
+	BUG_ON(!func);
+	BUG_ON(!func->card);
+
+	pr_debug("SDIO: Disabling IRQ for %s...\n", sdio_func_id(func));
+
+	if (func->irq_handler) {
+		func->irq_handler = NULL;
+		sdio_card_irq_put(func->card);
+		sdio_single_irq_set(func->card);
+	}
+
+	ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IENx, 0, &reg);
+	if (ret)
+		return ret;
+
+	reg &= ~(1 << func->num);
+
+	/* Disable master interrupt with the last function interrupt */
+	if (!(reg & 0xFE))
+		reg = 0;
+
+	ret = mmc_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IENx, reg, NULL);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(sdio_release_irq);
+
diff --git a/ANDROID_3.4.5/drivers/mmc/core/sdio_ops.c b/ANDROID_3.4.5/drivers/mmc/core/sdio_ops.c
new file mode 100644
index 00000000..d29e2063
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/sdio_ops.c
@@ -0,0 +1,199 @@
+/*
+ *  linux/drivers/mmc/sdio_ops.c
+ *
+ *  Copyright 2006-2007 Pierre Ossman
+ *
+ * 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.
+ */
+
+#include <linux/scatterlist.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sdio.h>
+
+#include "core.h"
+#include "sdio_ops.h"
+
+int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
+{
+	struct mmc_command cmd = {0};
+	int i, err = 0;
+
+	BUG_ON(!host);
+
+	cmd.opcode = SD_IO_SEND_OP_COND;
+	cmd.arg = ocr;
+	cmd.flags = MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR;
+
+	for (i = 100; i; i--) {
+		err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
+		if (err)
+			break;
+
+		/* if we're just probing, do a single pass */
+		if (ocr == 0)
+			break;
+
+		/* otherwise wait until reset completes */
+		if (mmc_host_is_spi(host)) {
+			/*
+			 * Both R1_SPI_IDLE and MMC_CARD_BUSY indicate
+			 * an initialized card under SPI, but some cards
+			 * (Marvell's) only behave when looking at this
+			 * one.
+			 */
+			if (cmd.resp[1] & MMC_CARD_BUSY)
+				break;
+		} else {
+			if (cmd.resp[0] & MMC_CARD_BUSY)
+				break;
+		}
+
+		err = -ETIMEDOUT;
+
+		mmc_delay(10);
+	}
+
+	if (rocr)
+		*rocr = cmd.resp[mmc_host_is_spi(host) ? 1 : 0];
+
+	return err;
+}
+
+static int mmc_io_rw_direct_host(struct mmc_host *host, int write, unsigned fn,
+	unsigned addr, u8 in, u8 *out)
+{
+	struct mmc_command cmd = {0};
+	int err;
+
+	BUG_ON(!host);
+	BUG_ON(fn > 7);
+
+	/* sanity check */
+	if (addr & ~0x1FFFF)
+		return -EINVAL;
+
+	cmd.opcode = SD_IO_RW_DIRECT;
+	cmd.arg = write ? 0x80000000 : 0x00000000;
+	cmd.arg |= fn << 28;
+	cmd.arg |= (write && out) ? 0x08000000 : 0x00000000;
+	cmd.arg |= addr << 9;
+	cmd.arg |= in;
+	cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC;
+
+	err = mmc_wait_for_cmd(host, &cmd, 0);
+	if (err)
+		return err;
+
+	if (mmc_host_is_spi(host)) {
+		/* host driver already reported errors */
+	} else {
+		if (cmd.resp[0] & R5_ERROR)
+			return -EIO;
+		if (cmd.resp[0] & R5_FUNCTION_NUMBER)
+			return -EINVAL;
+		if (cmd.resp[0] & R5_OUT_OF_RANGE)
+			return -ERANGE;
+	}
+
+	if (out) {
+		if (mmc_host_is_spi(host))
+			*out = (cmd.resp[0] >> 8) & 0xFF;
+		else
+			*out = cmd.resp[0] & 0xFF;
+	}
+
+	return 0;
+}
+
+int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn,
+	unsigned addr, u8 in, u8 *out)
+{
+	BUG_ON(!card);
+	return mmc_io_rw_direct_host(card->host, write, fn, addr, in, out);
+}
+
+int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
+	unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz)
+{
+	struct mmc_request mrq = {NULL};
+	struct mmc_command cmd = {0};
+	struct mmc_data data = {0};
+	struct scatterlist sg;
+
+	BUG_ON(!card);
+	BUG_ON(fn > 7);
+	WARN_ON(blksz == 0);
+
+	/* sanity check */
+	if (addr & ~0x1FFFF)
+		return -EINVAL;
+
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+
+	cmd.opcode = SD_IO_RW_EXTENDED;
+	cmd.arg = write ? 0x80000000 : 0x00000000;
+	cmd.arg |= fn << 28;
+	cmd.arg |= incr_addr ? 0x04000000 : 0x00000000;
+	cmd.arg |= addr << 9;
+	if (blocks == 0)
+		cmd.arg |= (blksz == 512) ? 0 : blksz;	/* byte mode */
+	else
+		cmd.arg |= 0x08000000 | blocks;		/* block mode */
+	cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
+
+	data.blksz = blksz;
+	/* Code in host drivers/fwk assumes that "blocks" always is >=1 */
+	data.blocks = blocks ? blocks : 1;
+	data.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
+	data.sg = &sg;
+	data.sg_len = 1;
+
+	sg_init_one(&sg, buf, data.blksz * data.blocks);
+
+	mmc_set_data_timeout(&data, card);
+
+	mmc_wait_for_req(card->host, &mrq);
+
+	if (cmd.error)
+		return cmd.error;
+	if (data.error)
+		return data.error;
+
+	if (mmc_host_is_spi(card->host)) {
+		/* host driver already reported errors */
+	} else {
+		if (cmd.resp[0] & R5_ERROR)
+			return -EIO;
+		if (cmd.resp[0] & R5_FUNCTION_NUMBER)
+			return -EINVAL;
+		if (cmd.resp[0] & R5_OUT_OF_RANGE)
+			return -ERANGE;
+	}
+
+	return 0;
+}
+
+int sdio_reset(struct mmc_host *host)
+{
+	int ret;
+	u8 abort;
+
+	/* SDIO Simplified Specification V2.0, 4.4 Reset for SDIO */
+
+	ret = mmc_io_rw_direct_host(host, 0, 0, SDIO_CCCR_ABORT, 0, &abort);
+	if (ret)
+		abort = 0x08;
+	else
+		abort |= 0x08;
+
+	ret = mmc_io_rw_direct_host(host, 1, 0, SDIO_CCCR_ABORT, abort, NULL);
+	return ret;
+}
+
diff --git a/ANDROID_3.4.5/drivers/mmc/core/sdio_ops.h b/ANDROID_3.4.5/drivers/mmc/core/sdio_ops.h
new file mode 100644
index 00000000..12a4d3ab
--- /dev/null
+++ b/ANDROID_3.4.5/drivers/mmc/core/sdio_ops.h
@@ -0,0 +1,23 @@
+/*
+ *  linux/drivers/mmc/sdio_ops.c
+ *
+ *  Copyright 2006-2007 Pierre Ossman
+ *
+ * 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.
+ */
+
+#ifndef _MMC_SDIO_OPS_H
+#define _MMC_SDIO_OPS_H
+
+int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr);
+int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn,
+	unsigned addr, u8 in, u8* out);
+int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
+	unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz);
+int sdio_reset(struct mmc_host *host);
+
+#endif
+