Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

40 files changed, 22598 insertions, 0 deletions

diff --git a/drivers/mmc/core/Kconfig b/drivers/mmc/core/Kconfig
new file mode 100644
index 000000000..42e89060c
--- /dev/null
+++ b/drivers/mmc/core/Kconfig
@@ -0,0 +1,82 @@
+#
+# MMC core configuration
+#
+config PWRSEQ_EMMC
+	tristate "HW reset support for eMMC"
+	default y
+	depends on OF
+	help
+	  This selects Hardware reset support aka pwrseq-emmc for eMMC
+	  devices. By default this option is set to y.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called pwrseq_emmc.
+
+config PWRSEQ_SD8787
+	tristate "HW reset support for SD8787 BT + Wifi module"
+	depends on OF && (MWIFIEX || BT_MRVL_SDIO)
+	help
+	  This selects hardware reset support for the SD8787 BT + Wifi
+	  module. By default this option is set to n.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called pwrseq_sd8787.
+
+config PWRSEQ_SIMPLE
+	tristate "Simple HW reset support for MMC"
+	default y
+	depends on OF
+	help
+	  This selects simple hardware reset support aka pwrseq-simple for MMC
+	  devices. By default this option is set to y.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called pwrseq_simple.
+
+config MMC_BLOCK
+	tristate "MMC block device driver"
+	depends on BLOCK
+	default y
+	help
+	  Say Y here to enable the MMC block device driver support.
+	  This provides a block device driver, which you can use to
+	  mount the filesystem. Almost everyone wishing MMC support
+	  should say Y or M here.
+
+config MMC_BLOCK_MINORS
+	int "Number of minors per block device"
+	depends on MMC_BLOCK
+	range 4 256
+	default 8
+	help
+	  Number of minors per block device. One is needed for every
+	  partition on the disk (plus one for the whole disk).
+
+	  Number of total MMC minors available is 256, so your number
+	  of supported block devices will be limited to 256 divided
+	  by this number.
+
+	  Default is 8 to be backwards compatible with previous
+	  hardwired device numbering.
+
+	  If unsure, say 8 here.
+
+config SDIO_UART
+	tristate "SDIO UART/GPS class support"
+	depends on TTY
+	help
+	  SDIO function driver for SDIO cards that implements the UART
+	  class, as well as the GPS class which appears like a UART.
+
+config MMC_TEST
+	tristate "MMC host test driver"
+	help
+	  Development driver that performs a series of reads and writes
+	  to a memory card in order to expose certain well known bugs
+	  in host controllers. The tests are executed by writing to the
+	  "test" file in debugfs under each card. Note that whatever is
+	  on your card will be overwritten by these tests.
+
+	  This driver is only of interest to those developing or
+	  testing a host driver. Most people should say N here.
+
diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile
new file mode 100644
index 000000000..abba078f7
--- /dev/null
+++ b/drivers/mmc/core/Makefile
@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the kernel mmc core.
+#
+
+obj-$(CONFIG_MMC)		+= mmc_core.o
+mmc_core-y			:= core.o bus.o host.o \
+				   mmc.o mmc_ops.o sd.o sd_ops.o \
+				   sdio.o sdio_ops.o sdio_bus.o \
+				   sdio_cis.o sdio_io.o sdio_irq.o \
+				   slot-gpio.o
+mmc_core-$(CONFIG_OF)		+= pwrseq.o
+obj-$(CONFIG_PWRSEQ_SIMPLE)	+= pwrseq_simple.o
+obj-$(CONFIG_PWRSEQ_SD8787)	+= pwrseq_sd8787.o
+obj-$(CONFIG_PWRSEQ_EMMC)	+= pwrseq_emmc.o
+mmc_core-$(CONFIG_DEBUG_FS)	+= debugfs.o
+obj-$(CONFIG_MMC_BLOCK)		+= mmc_block.o
+mmc_block-objs			:= block.o queue.o
+obj-$(CONFIG_MMC_TEST)		+= mmc_test.o
+obj-$(CONFIG_SDIO_UART)		+= sdio_uart.o
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
new file mode 100644
index 000000000..3029886a4
--- /dev/null
+++ b/drivers/mmc/core/block.c
@@ -0,0 +1,3095 @@
+/*
+ * Block driver for media (i.e., flash cards)
+ *
+ * Copyright 2002 Hewlett-Packard Company
+ * Copyright 2005-2008 Pierre Ossman
+ *
+ * Use consistent with the GNU GPL is permitted,
+ * provided that this copyright notice is
+ * preserved in its entirety in all copies and derived works.
+ *
+ * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
+ * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
+ * FITNESS FOR ANY PARTICULAR PURPOSE.
+ *
+ * Many thanks to Alessandro Rubini and Jonathan Corbet!
+ *
+ * Author:  Andrew Christian
+ *          28 May 2002
+ */
+#include <linux/moduleparam.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/hdreg.h>
+#include <linux/kdev_t.h>
+#include <linux/blkdev.h>
+#include <linux/cdev.h>
+#include <linux/mutex.h>
+#include <linux/scatterlist.h>
+#include <linux/string_helpers.h>
+#include <linux/delay.h>
+#include <linux/capability.h>
+#include <linux/compat.h>
+#include <linux/pm_runtime.h>
+#include <linux/idr.h>
+#include <linux/debugfs.h>
+
+#include <linux/mmc/ioctl.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sd.h>
+
+#include <linux/uaccess.h>
+
+#include "queue.h"
+#include "block.h"
+#include "core.h"
+#include "card.h"
+#include "host.h"
+#include "bus.h"
+#include "mmc_ops.h"
+#include "quirks.h"
+#include "sd_ops.h"
+
+MODULE_ALIAS("mmc:block");
+#ifdef MODULE_PARAM_PREFIX
+#undef MODULE_PARAM_PREFIX
+#endif
+#define MODULE_PARAM_PREFIX "mmcblk."
+
+/*
+ * Set a 10 second timeout for polling write request busy state. Note, mmc core
+ * is setting a 3 second timeout for SD cards, and SDHCI has long had a 10
+ * second software timer to timeout the whole request, so 10 seconds should be
+ * ample.
+ */
+#define MMC_BLK_TIMEOUT_MS  (10 * 1000)
+#define MMC_SANITIZE_REQ_TIMEOUT 240000
+#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
+#define MMC_EXTRACT_VALUE_FROM_ARG(x) ((x & 0x0000FF00) >> 8)
+
+#define mmc_req_rel_wr(req)	((req->cmd_flags & REQ_FUA) && \
+				  (rq_data_dir(req) == WRITE))
+static DEFINE_MUTEX(block_mutex);
+
+/*
+ * The defaults come from config options but can be overriden by module
+ * or bootarg options.
+ */
+static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
+
+/*
+ * We've only got one major, so number of mmcblk devices is
+ * limited to (1 << 20) / number of minors per device.  It is also
+ * limited by the MAX_DEVICES below.
+ */
+static int max_devices;
+
+#define MAX_DEVICES 256
+
+static DEFINE_IDA(mmc_blk_ida);
+static DEFINE_IDA(mmc_rpmb_ida);
+
+/*
+ * There is one mmc_blk_data per slot.
+ */
+struct mmc_blk_data {
+	spinlock_t	lock;
+	struct device	*parent;
+	struct gendisk	*disk;
+	struct mmc_queue queue;
+	struct list_head part;
+	struct list_head rpmbs;
+
+	unsigned int	flags;
+#define MMC_BLK_CMD23	(1 << 0)	/* Can do SET_BLOCK_COUNT for multiblock */
+#define MMC_BLK_REL_WR	(1 << 1)	/* MMC Reliable write support */
+
+	unsigned int	usage;
+	unsigned int	read_only;
+	unsigned int	part_type;
+	unsigned int	reset_done;
+#define MMC_BLK_READ		BIT(0)
+#define MMC_BLK_WRITE		BIT(1)
+#define MMC_BLK_DISCARD		BIT(2)
+#define MMC_BLK_SECDISCARD	BIT(3)
+#define MMC_BLK_CQE_RECOVERY	BIT(4)
+
+	/*
+	 * Only set in main mmc_blk_data associated
+	 * with mmc_card with dev_set_drvdata, and keeps
+	 * track of the current selected device partition.
+	 */
+	unsigned int	part_curr;
+	struct device_attribute force_ro;
+	struct device_attribute power_ro_lock;
+	int	area_type;
+
+	/* debugfs files (only in main mmc_blk_data) */
+	struct dentry *status_dentry;
+	struct dentry *ext_csd_dentry;
+};
+
+/* Device type for RPMB character devices */
+static dev_t mmc_rpmb_devt;
+
+/* Bus type for RPMB character devices */
+static struct bus_type mmc_rpmb_bus_type = {
+	.name = "mmc_rpmb",
+};
+
+/**
+ * struct mmc_rpmb_data - special RPMB device type for these areas
+ * @dev: the device for the RPMB area
+ * @chrdev: character device for the RPMB area
+ * @id: unique device ID number
+ * @part_index: partition index (0 on first)
+ * @md: parent MMC block device
+ * @node: list item, so we can put this device on a list
+ */
+struct mmc_rpmb_data {
+	struct device dev;
+	struct cdev chrdev;
+	int id;
+	unsigned int part_index;
+	struct mmc_blk_data *md;
+	struct list_head node;
+};
+
+static DEFINE_MUTEX(open_lock);
+
+module_param(perdev_minors, int, 0444);
+MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
+
+static inline int mmc_blk_part_switch(struct mmc_card *card,
+				      unsigned int part_type);
+
+static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
+{
+	struct mmc_blk_data *md;
+
+	mutex_lock(&open_lock);
+	md = disk->private_data;
+	if (md && md->usage == 0)
+		md = NULL;
+	if (md)
+		md->usage++;
+	mutex_unlock(&open_lock);
+
+	return md;
+}
+
+static inline int mmc_get_devidx(struct gendisk *disk)
+{
+	int devidx = disk->first_minor / perdev_minors;
+	return devidx;
+}
+
+static void mmc_blk_put(struct mmc_blk_data *md)
+{
+	mutex_lock(&open_lock);
+	md->usage--;
+	if (md->usage == 0) {
+		int devidx = mmc_get_devidx(md->disk);
+		blk_put_queue(md->queue.queue);
+		ida_simple_remove(&mmc_blk_ida, devidx);
+		put_disk(md->disk);
+		kfree(md);
+	}
+	mutex_unlock(&open_lock);
+}
+
+static ssize_t power_ro_lock_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	int ret;
+	struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
+	struct mmc_card *card = md->queue.card;
+	int locked = 0;
+
+	if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
+		locked = 2;
+	else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
+		locked = 1;
+
+	ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
+
+	mmc_blk_put(md);
+
+	return ret;
+}
+
+static ssize_t power_ro_lock_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	int ret;
+	struct mmc_blk_data *md, *part_md;
+	struct mmc_queue *mq;
+	struct request *req;
+	unsigned long set;
+
+	if (kstrtoul(buf, 0, &set))
+		return -EINVAL;
+
+	if (set != 1)
+		return count;
+
+	md = mmc_blk_get(dev_to_disk(dev));
+	mq = &md->queue;
+
+	/* Dispatch locking to the block layer */
+	req = blk_get_request(mq->queue, REQ_OP_DRV_OUT, 0);
+	if (IS_ERR(req)) {
+		count = PTR_ERR(req);
+		goto out_put;
+	}
+	req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_BOOT_WP;
+	blk_execute_rq(mq->queue, NULL, req, 0);
+	ret = req_to_mmc_queue_req(req)->drv_op_result;
+	blk_put_request(req);
+
+	if (!ret) {
+		pr_info("%s: Locking boot partition ro until next power on\n",
+			md->disk->disk_name);
+		set_disk_ro(md->disk, 1);
+
+		list_for_each_entry(part_md, &md->part, part)
+			if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
+				pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
+				set_disk_ro(part_md->disk, 1);
+			}
+	}
+out_put:
+	mmc_blk_put(md);
+	return count;
+}
+
+static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	int ret;
+	struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
+
+	ret = snprintf(buf, PAGE_SIZE, "%d\n",
+		       get_disk_ro(dev_to_disk(dev)) ^
+		       md->read_only);
+	mmc_blk_put(md);
+	return ret;
+}
+
+static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	int ret;
+	char *end;
+	struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
+	unsigned long set = simple_strtoul(buf, &end, 0);
+	if (end == buf) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	set_disk_ro(dev_to_disk(dev), set || md->read_only);
+	ret = count;
+out:
+	mmc_blk_put(md);
+	return ret;
+}
+
+static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
+{
+	struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
+	int ret = -ENXIO;
+
+	mutex_lock(&block_mutex);
+	if (md) {
+		if (md->usage == 2)
+			check_disk_change(bdev);
+		ret = 0;
+
+		if ((mode & FMODE_WRITE) && md->read_only) {
+			mmc_blk_put(md);
+			ret = -EROFS;
+		}
+	}
+	mutex_unlock(&block_mutex);
+
+	return ret;
+}
+
+static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
+{
+	struct mmc_blk_data *md = disk->private_data;
+
+	mutex_lock(&block_mutex);
+	mmc_blk_put(md);
+	mutex_unlock(&block_mutex);
+}
+
+static int
+mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
+{
+	geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
+	geo->heads = 4;
+	geo->sectors = 16;
+	return 0;
+}
+
+struct mmc_blk_ioc_data {
+	struct mmc_ioc_cmd ic;
+	unsigned char *buf;
+	u64 buf_bytes;
+	struct mmc_rpmb_data *rpmb;
+};
+
+static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
+	struct mmc_ioc_cmd __user *user)
+{
+	struct mmc_blk_ioc_data *idata;
+	int err;
+
+	idata = kmalloc(sizeof(*idata), GFP_KERNEL);
+	if (!idata) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
+		err = -EFAULT;
+		goto idata_err;
+	}
+
+	idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
+	if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
+		err = -EOVERFLOW;
+		goto idata_err;
+	}
+
+	if (!idata->buf_bytes) {
+		idata->buf = NULL;
+		return idata;
+	}
+
+	idata->buf = memdup_user((void __user *)(unsigned long)
+				 idata->ic.data_ptr, idata->buf_bytes);
+	if (IS_ERR(idata->buf)) {
+		err = PTR_ERR(idata->buf);
+		goto idata_err;
+	}
+
+	return idata;
+
+idata_err:
+	kfree(idata);
+out:
+	return ERR_PTR(err);
+}
+
+static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
+				      struct mmc_blk_ioc_data *idata)
+{
+	struct mmc_ioc_cmd *ic = &idata->ic;
+
+	if (copy_to_user(&(ic_ptr->response), ic->response,
+			 sizeof(ic->response)))
+		return -EFAULT;
+
+	if (!idata->ic.write_flag) {
+		if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
+				 idata->buf, idata->buf_bytes))
+			return -EFAULT;
+	}
+
+	return 0;
+}
+
+static int ioctl_do_sanitize(struct mmc_card *card)
+{
+	int err;
+
+	if (!mmc_can_sanitize(card)) {
+			pr_warn("%s: %s - SANITIZE is not supported\n",
+				mmc_hostname(card->host), __func__);
+			err = -EOPNOTSUPP;
+			goto out;
+	}
+
+	pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
+		mmc_hostname(card->host), __func__);
+
+	err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+					EXT_CSD_SANITIZE_START, 1,
+					MMC_SANITIZE_REQ_TIMEOUT);
+
+	if (err)
+		pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
+		       mmc_hostname(card->host), __func__, err);
+
+	pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
+					     __func__);
+out:
+	return err;
+}
+
+static inline bool mmc_blk_in_tran_state(u32 status)
+{
+	/*
+	 * Some cards mishandle the status bits, so make sure to check both the
+	 * busy indication and the card state.
+	 */
+	return status & R1_READY_FOR_DATA &&
+	       (R1_CURRENT_STATE(status) == R1_STATE_TRAN);
+}
+
+static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
+			    u32 *resp_errs)
+{
+	unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
+	int err = 0;
+	u32 status;
+
+	do {
+		bool done = time_after(jiffies, timeout);
+
+		err = __mmc_send_status(card, &status, 5);
+		if (err) {
+			dev_err(mmc_dev(card->host),
+				"error %d requesting status\n", err);
+			return err;
+		}
+
+		/* Accumulate any response error bits seen */
+		if (resp_errs)
+			*resp_errs |= status;
+
+		/*
+		 * Timeout if the device never becomes ready for data and never
+		 * leaves the program state.
+		 */
+		if (done) {
+			dev_err(mmc_dev(card->host),
+				"Card stuck in wrong state! %s status: %#x\n",
+				 __func__, status);
+			return -ETIMEDOUT;
+		}
+
+		/*
+		 * Some cards mishandle the status bits,
+		 * so make sure to check both the busy
+		 * indication and the card state.
+		 */
+	} while (!mmc_blk_in_tran_state(status));
+
+	return err;
+}
+
+static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
+			       struct mmc_blk_ioc_data *idata)
+{
+	struct mmc_command cmd = {}, sbc = {};
+	struct mmc_data data = {};
+	struct mmc_request mrq = {};
+	struct scatterlist sg;
+	int err;
+	unsigned int target_part;
+
+	if (!card || !md || !idata)
+		return -EINVAL;
+
+	/*
+	 * The RPMB accesses comes in from the character device, so we
+	 * need to target these explicitly. Else we just target the
+	 * partition type for the block device the ioctl() was issued
+	 * on.
+	 */
+	if (idata->rpmb) {
+		/* Support multiple RPMB partitions */
+		target_part = idata->rpmb->part_index;
+		target_part |= EXT_CSD_PART_CONFIG_ACC_RPMB;
+	} else {
+		target_part = md->part_type;
+	}
+
+	cmd.opcode = idata->ic.opcode;
+	cmd.arg = idata->ic.arg;
+	cmd.flags = idata->ic.flags;
+
+	if (idata->buf_bytes) {
+		data.sg = &sg;
+		data.sg_len = 1;
+		data.blksz = idata->ic.blksz;
+		data.blocks = idata->ic.blocks;
+
+		sg_init_one(data.sg, idata->buf, idata->buf_bytes);
+
+		if (idata->ic.write_flag)
+			data.flags = MMC_DATA_WRITE;
+		else
+			data.flags = MMC_DATA_READ;
+
+		/* data.flags must already be set before doing this. */
+		mmc_set_data_timeout(&data, card);
+
+		/* Allow overriding the timeout_ns for empirical tuning. */
+		if (idata->ic.data_timeout_ns)
+			data.timeout_ns = idata->ic.data_timeout_ns;
+
+		if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
+			/*
+			 * Pretend this is a data transfer and rely on the
+			 * host driver to compute timeout.  When all host
+			 * drivers support cmd.cmd_timeout for R1B, this
+			 * can be changed to:
+			 *
+			 *     mrq.data = NULL;
+			 *     cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
+			 */
+			data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
+		}
+
+		mrq.data = &data;
+	}
+
+	mrq.cmd = &cmd;
+
+	err = mmc_blk_part_switch(card, target_part);
+	if (err)
+		return err;
+
+	if (idata->ic.is_acmd) {
+		err = mmc_app_cmd(card->host, card);
+		if (err)
+			return err;
+	}
+
+	if (idata->rpmb) {
+		sbc.opcode = MMC_SET_BLOCK_COUNT;
+		/*
+		 * We don't do any blockcount validation because the max size
+		 * may be increased by a future standard. We just copy the
+		 * 'Reliable Write' bit here.
+		 */
+		sbc.arg = data.blocks | (idata->ic.write_flag & BIT(31));
+		sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
+		mrq.sbc = &sbc;
+	}
+
+	if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
+	    (cmd.opcode == MMC_SWITCH)) {
+		err = ioctl_do_sanitize(card);
+
+		if (err)
+			pr_err("%s: ioctl_do_sanitize() failed. err = %d",
+			       __func__, err);
+
+		return err;
+	}
+
+	mmc_wait_for_req(card->host, &mrq);
+	memcpy(&idata->ic.response, cmd.resp, sizeof(cmd.resp));
+
+	if (cmd.error) {
+		dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
+						__func__, cmd.error);
+		return cmd.error;
+	}
+	if (data.error) {
+		dev_err(mmc_dev(card->host), "%s: data error %d\n",
+						__func__, data.error);
+		return data.error;
+	}
+
+	/*
+	 * Make sure the cache of the PARTITION_CONFIG register and
+	 * PARTITION_ACCESS bits is updated in case the ioctl ext_csd write
+	 * changed it successfully.
+	 */
+	if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_PART_CONFIG) &&
+	    (cmd.opcode == MMC_SWITCH)) {
+		struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
+		u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg);
+
+		/*
+		 * Update cache so the next mmc_blk_part_switch call operates
+		 * on up-to-date data.
+		 */
+		card->ext_csd.part_config = value;
+		main_md->part_curr = value & EXT_CSD_PART_CONFIG_ACC_MASK;
+	}
+
+	/*
+	 * Make sure to update CACHE_CTRL in case it was changed. The cache
+	 * will get turned back on if the card is re-initialized, e.g.
+	 * suspend/resume or hw reset in recovery.
+	 */
+	if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_CACHE_CTRL) &&
+	    (cmd.opcode == MMC_SWITCH)) {
+		u8 value = MMC_EXTRACT_VALUE_FROM_ARG(cmd.arg) & 1;
+
+		card->ext_csd.cache_ctrl = value;
+	}
+
+	/*
+	 * According to the SD specs, some commands require a delay after
+	 * issuing the command.
+	 */
+	if (idata->ic.postsleep_min_us)
+		usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
+
+	if (idata->rpmb || (cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
+		/*
+		 * Ensure RPMB/R1B command has completed by polling CMD13
+		 * "Send Status".
+		 */
+		err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, NULL);
+	}
+
+	return err;
+}
+
+static int mmc_blk_ioctl_cmd(struct mmc_blk_data *md,
+			     struct mmc_ioc_cmd __user *ic_ptr,
+			     struct mmc_rpmb_data *rpmb)
+{
+	struct mmc_blk_ioc_data *idata;
+	struct mmc_blk_ioc_data *idatas[1];
+	struct mmc_queue *mq;
+	struct mmc_card *card;
+	int err = 0, ioc_err = 0;
+	struct request *req;
+
+	idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
+	if (IS_ERR(idata))
+		return PTR_ERR(idata);
+	/* This will be NULL on non-RPMB ioctl():s */
+	idata->rpmb = rpmb;
+
+	card = md->queue.card;
+	if (IS_ERR(card)) {
+		err = PTR_ERR(card);
+		goto cmd_done;
+	}
+
+	/*
+	 * Dispatch the ioctl() into the block request queue.
+	 */
+	mq = &md->queue;
+	req = blk_get_request(mq->queue,
+		idata->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
+	if (IS_ERR(req)) {
+		err = PTR_ERR(req);
+		goto cmd_done;
+	}
+	idatas[0] = idata;
+	req_to_mmc_queue_req(req)->drv_op =
+		rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL;
+	req_to_mmc_queue_req(req)->drv_op_data = idatas;
+	req_to_mmc_queue_req(req)->ioc_count = 1;
+	blk_execute_rq(mq->queue, NULL, req, 0);
+	ioc_err = req_to_mmc_queue_req(req)->drv_op_result;
+	err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
+	blk_put_request(req);
+
+cmd_done:
+	kfree(idata->buf);
+	kfree(idata);
+	return ioc_err ? ioc_err : err;
+}
+
+static int mmc_blk_ioctl_multi_cmd(struct mmc_blk_data *md,
+				   struct mmc_ioc_multi_cmd __user *user,
+				   struct mmc_rpmb_data *rpmb)
+{
+	struct mmc_blk_ioc_data **idata = NULL;
+	struct mmc_ioc_cmd __user *cmds = user->cmds;
+	struct mmc_card *card;
+	struct mmc_queue *mq;
+	int i, err = 0, ioc_err = 0;
+	__u64 num_of_cmds;
+	struct request *req;
+
+	if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
+			   sizeof(num_of_cmds)))
+		return -EFAULT;
+
+	if (!num_of_cmds)
+		return 0;
+
+	if (num_of_cmds > MMC_IOC_MAX_CMDS)
+		return -EINVAL;
+
+	idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
+	if (!idata)
+		return -ENOMEM;
+
+	for (i = 0; i < num_of_cmds; i++) {
+		idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
+		if (IS_ERR(idata[i])) {
+			err = PTR_ERR(idata[i]);
+			num_of_cmds = i;
+			goto cmd_err;
+		}
+		/* This will be NULL on non-RPMB ioctl():s */
+		idata[i]->rpmb = rpmb;
+	}
+
+	card = md->queue.card;
+	if (IS_ERR(card)) {
+		err = PTR_ERR(card);
+		goto cmd_err;
+	}
+
+
+	/*
+	 * Dispatch the ioctl()s into the block request queue.
+	 */
+	mq = &md->queue;
+	req = blk_get_request(mq->queue,
+		idata[0]->ic.write_flag ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
+	if (IS_ERR(req)) {
+		err = PTR_ERR(req);
+		goto cmd_err;
+	}
+	req_to_mmc_queue_req(req)->drv_op =
+		rpmb ? MMC_DRV_OP_IOCTL_RPMB : MMC_DRV_OP_IOCTL;
+	req_to_mmc_queue_req(req)->drv_op_data = idata;
+	req_to_mmc_queue_req(req)->ioc_count = num_of_cmds;
+	blk_execute_rq(mq->queue, NULL, req, 0);
+	ioc_err = req_to_mmc_queue_req(req)->drv_op_result;
+
+	/* copy to user if data and response */
+	for (i = 0; i < num_of_cmds && !err; i++)
+		err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
+
+	blk_put_request(req);
+
+cmd_err:
+	for (i = 0; i < num_of_cmds; i++) {
+		kfree(idata[i]->buf);
+		kfree(idata[i]);
+	}
+	kfree(idata);
+	return ioc_err ? ioc_err : err;
+}
+
+static int mmc_blk_check_blkdev(struct block_device *bdev)
+{
+	/*
+	 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
+	 * whole block device, not on a partition.  This prevents overspray
+	 * between sibling partitions.
+	 */
+	if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
+		return -EPERM;
+	return 0;
+}
+
+static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
+	unsigned int cmd, unsigned long arg)
+{
+	struct mmc_blk_data *md;
+	int ret;
+
+	switch (cmd) {
+	case MMC_IOC_CMD:
+		ret = mmc_blk_check_blkdev(bdev);
+		if (ret)
+			return ret;
+		md = mmc_blk_get(bdev->bd_disk);
+		if (!md)
+			return -EINVAL;
+		ret = mmc_blk_ioctl_cmd(md,
+					(struct mmc_ioc_cmd __user *)arg,
+					NULL);
+		mmc_blk_put(md);
+		return ret;
+	case MMC_IOC_MULTI_CMD:
+		ret = mmc_blk_check_blkdev(bdev);
+		if (ret)
+			return ret;
+		md = mmc_blk_get(bdev->bd_disk);
+		if (!md)
+			return -EINVAL;
+		ret = mmc_blk_ioctl_multi_cmd(md,
+					(struct mmc_ioc_multi_cmd __user *)arg,
+					NULL);
+		mmc_blk_put(md);
+		return ret;
+	default:
+		return -EINVAL;
+	}
+}
+
+#ifdef CONFIG_COMPAT
+static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
+	unsigned int cmd, unsigned long arg)
+{
+	return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
+}
+#endif
+
+static const struct block_device_operations mmc_bdops = {
+	.open			= mmc_blk_open,
+	.release		= mmc_blk_release,
+	.getgeo			= mmc_blk_getgeo,
+	.owner			= THIS_MODULE,
+	.ioctl			= mmc_blk_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl		= mmc_blk_compat_ioctl,
+#endif
+};
+
+static int mmc_blk_part_switch_pre(struct mmc_card *card,
+				   unsigned int part_type)
+{
+	int ret = 0;
+
+	if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) {
+		if (card->ext_csd.cmdq_en) {
+			ret = mmc_cmdq_disable(card);
+			if (ret)
+				return ret;
+		}
+		mmc_retune_pause(card->host);
+	}
+
+	return ret;
+}
+
+static int mmc_blk_part_switch_post(struct mmc_card *card,
+				    unsigned int part_type)
+{
+	int ret = 0;
+
+	if (part_type == EXT_CSD_PART_CONFIG_ACC_RPMB) {
+		mmc_retune_unpause(card->host);
+		if (card->reenable_cmdq && !card->ext_csd.cmdq_en)
+			ret = mmc_cmdq_enable(card);
+	}
+
+	return ret;
+}
+
+static inline int mmc_blk_part_switch(struct mmc_card *card,
+				      unsigned int part_type)
+{
+	int ret = 0;
+	struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
+
+	if (main_md->part_curr == part_type)
+		return 0;
+
+	if (mmc_card_mmc(card)) {
+		u8 part_config = card->ext_csd.part_config;
+
+		ret = mmc_blk_part_switch_pre(card, part_type);
+		if (ret)
+			return ret;
+
+		part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
+		part_config |= part_type;
+
+		ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 EXT_CSD_PART_CONFIG, part_config,
+				 card->ext_csd.part_time);
+		if (ret) {
+			mmc_blk_part_switch_post(card, part_type);
+			return ret;
+		}
+
+		card->ext_csd.part_config = part_config;
+
+		ret = mmc_blk_part_switch_post(card, main_md->part_curr);
+	}
+
+	main_md->part_curr = part_type;
+	return ret;
+}
+
+static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks)
+{
+	int err;
+	u32 result;
+	__be32 *blocks;
+
+	struct mmc_request mrq = {};
+	struct mmc_command cmd = {};
+	struct mmc_data data = {};
+
+	struct scatterlist sg;
+
+	cmd.opcode = MMC_APP_CMD;
+	cmd.arg = card->rca << 16;
+	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
+
+	err = mmc_wait_for_cmd(card->host, &cmd, 0);
+	if (err)
+		return err;
+	if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
+		return -EIO;
+
+	memset(&cmd, 0, sizeof(struct mmc_command));
+
+	cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
+
+	data.blksz = 4;
+	data.blocks = 1;
+	data.flags = MMC_DATA_READ;
+	data.sg = &sg;
+	data.sg_len = 1;
+	mmc_set_data_timeout(&data, card);
+
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+
+	blocks = kmalloc(4, GFP_KERNEL);
+	if (!blocks)
+		return -ENOMEM;
+
+	sg_init_one(&sg, blocks, 4);
+
+	mmc_wait_for_req(card->host, &mrq);
+
+	result = ntohl(*blocks);
+	kfree(blocks);
+
+	if (cmd.error || data.error)
+		return -EIO;
+
+	*written_blocks = result;
+
+	return 0;
+}
+
+static unsigned int mmc_blk_clock_khz(struct mmc_host *host)
+{
+	if (host->actual_clock)
+		return host->actual_clock / 1000;
+
+	/* Clock may be subject to a divisor, fudge it by a factor of 2. */
+	if (host->ios.clock)
+		return host->ios.clock / 2000;
+
+	/* How can there be no clock */
+	WARN_ON_ONCE(1);
+	return 100; /* 100 kHz is minimum possible value */
+}
+
+static unsigned int mmc_blk_data_timeout_ms(struct mmc_host *host,
+					    struct mmc_data *data)
+{
+	unsigned int ms = DIV_ROUND_UP(data->timeout_ns, 1000000);
+	unsigned int khz;
+
+	if (data->timeout_clks) {
+		khz = mmc_blk_clock_khz(host);
+		ms += DIV_ROUND_UP(data->timeout_clks, khz);
+	}
+
+	return ms;
+}
+
+static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
+			 int type)
+{
+	int err;
+
+	if (md->reset_done & type)
+		return -EEXIST;
+
+	md->reset_done |= type;
+	err = mmc_hw_reset(host);
+	/* Ensure we switch back to the correct partition */
+	if (err != -EOPNOTSUPP) {
+		struct mmc_blk_data *main_md =
+			dev_get_drvdata(&host->card->dev);
+		int part_err;
+
+		main_md->part_curr = main_md->part_type;
+		part_err = mmc_blk_part_switch(host->card, md->part_type);
+		if (part_err) {
+			/*
+			 * We have failed to get back into the correct
+			 * partition, so we need to abort the whole request.
+			 */
+			return -ENODEV;
+		}
+	}
+	return err;
+}
+
+static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
+{
+	md->reset_done &= ~type;
+}
+
+/*
+ * The non-block commands come back from the block layer after it queued it and
+ * processed it with all other requests and then they get issued in this
+ * function.
+ */
+static void mmc_blk_issue_drv_op(struct mmc_queue *mq, struct request *req)
+{
+	struct mmc_queue_req *mq_rq;
+	struct mmc_card *card = mq->card;
+	struct mmc_blk_data *md = mq->blkdata;
+	struct mmc_blk_ioc_data **idata;
+	bool rpmb_ioctl;
+	u8 **ext_csd;
+	u32 status;
+	int ret;
+	int i;
+
+	mq_rq = req_to_mmc_queue_req(req);
+	rpmb_ioctl = (mq_rq->drv_op == MMC_DRV_OP_IOCTL_RPMB);
+
+	switch (mq_rq->drv_op) {
+	case MMC_DRV_OP_IOCTL:
+		if (card->ext_csd.cmdq_en) {
+			ret = mmc_cmdq_disable(card);
+			if (ret)
+				break;
+		}
+		/* fallthrough */
+	case MMC_DRV_OP_IOCTL_RPMB:
+		idata = mq_rq->drv_op_data;
+		for (i = 0, ret = 0; i < mq_rq->ioc_count; i++) {
+			ret = __mmc_blk_ioctl_cmd(card, md, idata[i]);
+			if (ret)
+				break;
+		}
+		/* Always switch back to main area after RPMB access */
+		if (rpmb_ioctl)
+			mmc_blk_part_switch(card, 0);
+		else if (card->reenable_cmdq && !card->ext_csd.cmdq_en)
+			mmc_cmdq_enable(card);
+		break;
+	case MMC_DRV_OP_BOOT_WP:
+		ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
+				 card->ext_csd.boot_ro_lock |
+				 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
+				 card->ext_csd.part_time);
+		if (ret)
+			pr_err("%s: Locking boot partition ro until next power on failed: %d\n",
+			       md->disk->disk_name, ret);
+		else
+			card->ext_csd.boot_ro_lock |=
+				EXT_CSD_BOOT_WP_B_PWR_WP_EN;
+		break;
+	case MMC_DRV_OP_GET_CARD_STATUS:
+		ret = mmc_send_status(card, &status);
+		if (!ret)
+			ret = status;
+		break;
+	case MMC_DRV_OP_GET_EXT_CSD:
+		ext_csd = mq_rq->drv_op_data;
+		ret = mmc_get_ext_csd(card, ext_csd);
+		break;
+	default:
+		pr_err("%s: unknown driver specific operation\n",
+		       md->disk->disk_name);
+		ret = -EINVAL;
+		break;
+	}
+	mq_rq->drv_op_result = ret;
+	blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK);
+}
+
+static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
+{
+	struct mmc_blk_data *md = mq->blkdata;
+	struct mmc_card *card = md->queue.card;
+	unsigned int from, nr, arg;
+	int err = 0, type = MMC_BLK_DISCARD;
+	blk_status_t status = BLK_STS_OK;
+
+	if (!mmc_can_erase(card)) {
+		status = BLK_STS_NOTSUPP;
+		goto fail;
+	}
+
+	from = blk_rq_pos(req);
+	nr = blk_rq_sectors(req);
+
+	if (mmc_can_discard(card))
+		arg = MMC_DISCARD_ARG;
+	else if (mmc_can_trim(card))
+		arg = MMC_TRIM_ARG;
+	else
+		arg = MMC_ERASE_ARG;
+	do {
+		err = 0;
+		if (card->quirks & MMC_QUIRK_INAND_CMD38) {
+			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+					 INAND_CMD38_ARG_EXT_CSD,
+					 arg == MMC_TRIM_ARG ?
+					 INAND_CMD38_ARG_TRIM :
+					 INAND_CMD38_ARG_ERASE,
+					 card->ext_csd.generic_cmd6_time);
+		}
+		if (!err)
+			err = mmc_erase(card, from, nr, arg);
+	} while (err == -EIO && !mmc_blk_reset(md, card->host, type));
+	if (err)
+		status = BLK_STS_IOERR;
+	else
+		mmc_blk_reset_success(md, type);
+fail:
+	blk_mq_end_request(req, status);
+}
+
+static void mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
+				       struct request *req)
+{
+	struct mmc_blk_data *md = mq->blkdata;
+	struct mmc_card *card = md->queue.card;
+	unsigned int from, nr, arg;
+	int err = 0, type = MMC_BLK_SECDISCARD;
+	blk_status_t status = BLK_STS_OK;
+
+	if (!(mmc_can_secure_erase_trim(card))) {
+		status = BLK_STS_NOTSUPP;
+		goto out;
+	}
+
+	from = blk_rq_pos(req);
+	nr = blk_rq_sectors(req);
+
+	if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
+		arg = MMC_SECURE_TRIM1_ARG;
+	else
+		arg = MMC_SECURE_ERASE_ARG;
+
+retry:
+	if (card->quirks & MMC_QUIRK_INAND_CMD38) {
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 INAND_CMD38_ARG_EXT_CSD,
+				 arg == MMC_SECURE_TRIM1_ARG ?
+				 INAND_CMD38_ARG_SECTRIM1 :
+				 INAND_CMD38_ARG_SECERASE,
+				 card->ext_csd.generic_cmd6_time);
+		if (err)
+			goto out_retry;
+	}
+
+	err = mmc_erase(card, from, nr, arg);
+	if (err == -EIO)
+		goto out_retry;
+	if (err) {
+		status = BLK_STS_IOERR;
+		goto out;
+	}
+
+	if (arg == MMC_SECURE_TRIM1_ARG) {
+		if (card->quirks & MMC_QUIRK_INAND_CMD38) {
+			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+					 INAND_CMD38_ARG_EXT_CSD,
+					 INAND_CMD38_ARG_SECTRIM2,
+					 card->ext_csd.generic_cmd6_time);
+			if (err)
+				goto out_retry;
+		}
+
+		err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
+		if (err == -EIO)
+			goto out_retry;
+		if (err) {
+			status = BLK_STS_IOERR;
+			goto out;
+		}
+	}
+
+out_retry:
+	if (err && !mmc_blk_reset(md, card->host, type))
+		goto retry;
+	if (!err)
+		mmc_blk_reset_success(md, type);
+out:
+	blk_mq_end_request(req, status);
+}
+
+static void mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
+{
+	struct mmc_blk_data *md = mq->blkdata;
+	struct mmc_card *card = md->queue.card;
+	int ret = 0;
+
+	ret = mmc_flush_cache(card);
+	blk_mq_end_request(req, ret ? BLK_STS_IOERR : BLK_STS_OK);
+}
+
+/*
+ * Reformat current write as a reliable write, supporting
+ * both legacy and the enhanced reliable write MMC cards.
+ * In each transfer we'll handle only as much as a single
+ * reliable write can handle, thus finish the request in
+ * partial completions.
+ */
+static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
+				    struct mmc_card *card,
+				    struct request *req)
+{
+	if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
+		/* Legacy mode imposes restrictions on transfers. */
+		if (!IS_ALIGNED(blk_rq_pos(req), card->ext_csd.rel_sectors))
+			brq->data.blocks = 1;
+
+		if (brq->data.blocks > card->ext_csd.rel_sectors)
+			brq->data.blocks = card->ext_csd.rel_sectors;
+		else if (brq->data.blocks < card->ext_csd.rel_sectors)
+			brq->data.blocks = 1;
+	}
+}
+
+#define CMD_ERRORS_EXCL_OOR						\
+	(R1_ADDRESS_ERROR |	/* Misaligned address */		\
+	 R1_BLOCK_LEN_ERROR |	/* Transferred block length incorrect */\
+	 R1_WP_VIOLATION |	/* Tried to write to protected block */	\
+	 R1_CARD_ECC_FAILED |	/* Card ECC failed */			\
+	 R1_CC_ERROR |		/* Card controller error */		\
+	 R1_ERROR)		/* General/unknown error */
+
+#define CMD_ERRORS							\
+	(CMD_ERRORS_EXCL_OOR |						\
+	 R1_OUT_OF_RANGE)	/* Command argument out of range */	\
+
+static void mmc_blk_eval_resp_error(struct mmc_blk_request *brq)
+{
+	u32 val;
+
+	/*
+	 * Per the SD specification(physical layer version 4.10)[1],
+	 * section 4.3.3, it explicitly states that "When the last
+	 * block of user area is read using CMD18, the host should
+	 * ignore OUT_OF_RANGE error that may occur even the sequence
+	 * is correct". And JESD84-B51 for eMMC also has a similar
+	 * statement on section 6.8.3.
+	 *
+	 * Multiple block read/write could be done by either predefined
+	 * method, namely CMD23, or open-ending mode. For open-ending mode,
+	 * we should ignore the OUT_OF_RANGE error as it's normal behaviour.
+	 *
+	 * However the spec[1] doesn't tell us whether we should also
+	 * ignore that for predefined method. But per the spec[1], section
+	 * 4.15 Set Block Count Command, it says"If illegal block count
+	 * is set, out of range error will be indicated during read/write
+	 * operation (For example, data transfer is stopped at user area
+	 * boundary)." In another word, we could expect a out of range error
+	 * in the response for the following CMD18/25. And if argument of
+	 * CMD23 + the argument of CMD18/25 exceed the max number of blocks,
+	 * we could also expect to get a -ETIMEDOUT or any error number from
+	 * the host drivers due to missing data response(for write)/data(for
+	 * read), as the cards will stop the data transfer by itself per the
+	 * spec. So we only need to check R1_OUT_OF_RANGE for open-ending mode.
+	 */
+
+	if (!brq->stop.error) {
+		bool oor_with_open_end;
+		/* If there is no error yet, check R1 response */
+
+		val = brq->stop.resp[0] & CMD_ERRORS;
+		oor_with_open_end = val & R1_OUT_OF_RANGE && !brq->mrq.sbc;
+
+		if (val && !oor_with_open_end)
+			brq->stop.error = -EIO;
+	}
+}
+
+static void mmc_blk_data_prep(struct mmc_queue *mq, struct mmc_queue_req *mqrq,
+			      int disable_multi, bool *do_rel_wr_p,
+			      bool *do_data_tag_p)
+{
+	struct mmc_blk_data *md = mq->blkdata;
+	struct mmc_card *card = md->queue.card;
+	struct mmc_blk_request *brq = &mqrq->brq;
+	struct request *req = mmc_queue_req_to_req(mqrq);
+	bool do_rel_wr, do_data_tag;
+
+	/*
+	 * Reliable writes are used to implement Forced Unit Access and
+	 * are supported only on MMCs.
+	 */
+	do_rel_wr = (req->cmd_flags & REQ_FUA) &&
+		    rq_data_dir(req) == WRITE &&
+		    (md->flags & MMC_BLK_REL_WR);
+
+	memset(brq, 0, sizeof(struct mmc_blk_request));
+
+	brq->mrq.data = &brq->data;
+	brq->mrq.tag = req->tag;
+
+	brq->stop.opcode = MMC_STOP_TRANSMISSION;
+	brq->stop.arg = 0;
+
+	if (rq_data_dir(req) == READ) {
+		brq->data.flags = MMC_DATA_READ;
+		brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
+	} else {
+		brq->data.flags = MMC_DATA_WRITE;
+		brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
+	}
+
+	brq->data.blksz = 512;
+	brq->data.blocks = blk_rq_sectors(req);
+	brq->data.blk_addr = blk_rq_pos(req);
+
+	/*
+	 * The command queue supports 2 priorities: "high" (1) and "simple" (0).
+	 * The eMMC will give "high" priority tasks priority over "simple"
+	 * priority tasks. Here we always set "simple" priority by not setting
+	 * MMC_DATA_PRIO.
+	 */
+
+	/*
+	 * The block layer doesn't support all sector count
+	 * restrictions, so we need to be prepared for too big
+	 * requests.
+	 */
+	if (brq->data.blocks > card->host->max_blk_count)
+		brq->data.blocks = card->host->max_blk_count;
+
+	if (brq->data.blocks > 1) {
+		/*
+		 * Some SD cards in SPI mode return a CRC error or even lock up
+		 * completely when trying to read the last block using a
+		 * multiblock read command.
+		 */
+		if (mmc_host_is_spi(card->host) && (rq_data_dir(req) == READ) &&
+		    (blk_rq_pos(req) + blk_rq_sectors(req) ==
+		     get_capacity(md->disk)))
+			brq->data.blocks--;
+
+		/*
+		 * After a read error, we redo the request one sector
+		 * at a time in order to accurately determine which
+		 * sectors can be read successfully.
+		 */
+		if (disable_multi)
+			brq->data.blocks = 1;
+
+		/*
+		 * Some controllers have HW issues while operating
+		 * in multiple I/O mode
+		 */
+		if (card->host->ops->multi_io_quirk)
+			brq->data.blocks = card->host->ops->multi_io_quirk(card,
+						(rq_data_dir(req) == READ) ?
+						MMC_DATA_READ : MMC_DATA_WRITE,
+						brq->data.blocks);
+	}
+
+	if (do_rel_wr) {
+		mmc_apply_rel_rw(brq, card, req);
+		brq->data.flags |= MMC_DATA_REL_WR;
+	}
+
+	/*
+	 * Data tag is used only during writing meta data to speed
+	 * up write and any subsequent read of this meta data
+	 */
+	do_data_tag = card->ext_csd.data_tag_unit_size &&
+		      (req->cmd_flags & REQ_META) &&
+		      (rq_data_dir(req) == WRITE) &&
+		      ((brq->data.blocks * brq->data.blksz) >=
+		       card->ext_csd.data_tag_unit_size);
+
+	if (do_data_tag)
+		brq->data.flags |= MMC_DATA_DAT_TAG;
+
+	mmc_set_data_timeout(&brq->data, card);
+
+	brq->data.sg = mqrq->sg;
+	brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
+
+	/*
+	 * Adjust the sg list so it is the same size as the
+	 * request.
+	 */
+	if (brq->data.blocks != blk_rq_sectors(req)) {
+		int i, data_size = brq->data.blocks << 9;
+		struct scatterlist *sg;
+
+		for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
+			data_size -= sg->length;
+			if (data_size <= 0) {
+				sg->length += data_size;
+				i++;
+				break;
+			}
+		}
+		brq->data.sg_len = i;
+	}
+
+	if (do_rel_wr_p)
+		*do_rel_wr_p = do_rel_wr;
+
+	if (do_data_tag_p)
+		*do_data_tag_p = do_data_tag;
+}
+
+#define MMC_CQE_RETRIES 2
+
+static void mmc_blk_cqe_complete_rq(struct mmc_queue *mq, struct request *req)
+{
+	struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
+	struct mmc_request *mrq = &mqrq->brq.mrq;
+	struct request_queue *q = req->q;
+	struct mmc_host *host = mq->card->host;
+	enum mmc_issue_type issue_type = mmc_issue_type(mq, req);
+	unsigned long flags;
+	bool put_card;
+	int err;
+
+	mmc_cqe_post_req(host, mrq);
+
+	if (mrq->cmd && mrq->cmd->error)
+		err = mrq->cmd->error;
+	else if (mrq->data && mrq->data->error)
+		err = mrq->data->error;
+	else
+		err = 0;
+
+	if (err) {
+		if (mqrq->retries++ < MMC_CQE_RETRIES)
+			blk_mq_requeue_request(req, true);
+		else
+			blk_mq_end_request(req, BLK_STS_IOERR);
+	} else if (mrq->data) {
+		if (blk_update_request(req, BLK_STS_OK, mrq->data->bytes_xfered))
+			blk_mq_requeue_request(req, true);
+		else
+			__blk_mq_end_request(req, BLK_STS_OK);
+	} else {
+		blk_mq_end_request(req, BLK_STS_OK);
+	}
+
+	spin_lock_irqsave(q->queue_lock, flags);
+
+	mq->in_flight[issue_type] -= 1;
+
+	put_card = (mmc_tot_in_flight(mq) == 0);
+
+	mmc_cqe_check_busy(mq);
+
+	spin_unlock_irqrestore(q->queue_lock, flags);
+
+	if (!mq->cqe_busy)
+		blk_mq_run_hw_queues(q, true);
+
+	if (put_card)
+		mmc_put_card(mq->card, &mq->ctx);
+}
+
+void mmc_blk_cqe_recovery(struct mmc_queue *mq)
+{
+	struct mmc_card *card = mq->card;
+	struct mmc_host *host = card->host;
+	int err;
+
+	pr_debug("%s: CQE recovery start\n", mmc_hostname(host));
+
+	err = mmc_cqe_recovery(host);
+	if (err)
+		mmc_blk_reset(mq->blkdata, host, MMC_BLK_CQE_RECOVERY);
+	mmc_blk_reset_success(mq->blkdata, MMC_BLK_CQE_RECOVERY);
+
+	pr_debug("%s: CQE recovery done\n", mmc_hostname(host));
+}
+
+static void mmc_blk_cqe_req_done(struct mmc_request *mrq)
+{
+	struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req,
+						  brq.mrq);
+	struct request *req = mmc_queue_req_to_req(mqrq);
+	struct request_queue *q = req->q;
+	struct mmc_queue *mq = q->queuedata;
+
+	/*
+	 * Block layer timeouts race with completions which means the normal
+	 * completion path cannot be used during recovery.
+	 */
+	if (mq->in_recovery)
+		mmc_blk_cqe_complete_rq(mq, req);
+	else
+		blk_mq_complete_request(req);
+}
+
+static int mmc_blk_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq)
+{
+	mrq->done		= mmc_blk_cqe_req_done;
+	mrq->recovery_notifier	= mmc_cqe_recovery_notifier;
+
+	return mmc_cqe_start_req(host, mrq);
+}
+
+static struct mmc_request *mmc_blk_cqe_prep_dcmd(struct mmc_queue_req *mqrq,
+						 struct request *req)
+{
+	struct mmc_blk_request *brq = &mqrq->brq;
+
+	memset(brq, 0, sizeof(*brq));
+
+	brq->mrq.cmd = &brq->cmd;
+	brq->mrq.tag = req->tag;
+
+	return &brq->mrq;
+}
+
+static int mmc_blk_cqe_issue_flush(struct mmc_queue *mq, struct request *req)
+{
+	struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
+	struct mmc_request *mrq = mmc_blk_cqe_prep_dcmd(mqrq, req);
+
+	mrq->cmd->opcode = MMC_SWITCH;
+	mrq->cmd->arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
+			(EXT_CSD_FLUSH_CACHE << 16) |
+			(1 << 8) |
+			EXT_CSD_CMD_SET_NORMAL;
+	mrq->cmd->flags = MMC_CMD_AC | MMC_RSP_R1B;
+
+	return mmc_blk_cqe_start_req(mq->card->host, mrq);
+}
+
+static int mmc_blk_cqe_issue_rw_rq(struct mmc_queue *mq, struct request *req)
+{
+	struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
+
+	mmc_blk_data_prep(mq, mqrq, 0, NULL, NULL);
+
+	return mmc_blk_cqe_start_req(mq->card->host, &mqrq->brq.mrq);
+}
+
+static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
+			       struct mmc_card *card,
+			       int disable_multi,
+			       struct mmc_queue *mq)
+{
+	u32 readcmd, writecmd;
+	struct mmc_blk_request *brq = &mqrq->brq;
+	struct request *req = mmc_queue_req_to_req(mqrq);
+	struct mmc_blk_data *md = mq->blkdata;
+	bool do_rel_wr, do_data_tag;
+
+	mmc_blk_data_prep(mq, mqrq, disable_multi, &do_rel_wr, &do_data_tag);
+
+	brq->mrq.cmd = &brq->cmd;
+
+	brq->cmd.arg = blk_rq_pos(req);
+	if (!mmc_card_blockaddr(card))
+		brq->cmd.arg <<= 9;
+	brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
+
+	if (brq->data.blocks > 1 || do_rel_wr) {
+		/* SPI multiblock writes terminate using a special
+		 * token, not a STOP_TRANSMISSION request.
+		 */
+		if (!mmc_host_is_spi(card->host) ||
+		    rq_data_dir(req) == READ)
+			brq->mrq.stop = &brq->stop;
+		readcmd = MMC_READ_MULTIPLE_BLOCK;
+		writecmd = MMC_WRITE_MULTIPLE_BLOCK;
+	} else {
+		brq->mrq.stop = NULL;
+		readcmd = MMC_READ_SINGLE_BLOCK;
+		writecmd = MMC_WRITE_BLOCK;
+	}
+	brq->cmd.opcode = rq_data_dir(req) == READ ? readcmd : writecmd;
+
+	/*
+	 * Pre-defined multi-block transfers are preferable to
+	 * open ended-ones (and necessary for reliable writes).
+	 * However, it is not sufficient to just send CMD23,
+	 * and avoid the final CMD12, as on an error condition
+	 * CMD12 (stop) needs to be sent anyway. This, coupled
+	 * with Auto-CMD23 enhancements provided by some
+	 * hosts, means that the complexity of dealing
+	 * with this is best left to the host. If CMD23 is
+	 * supported by card and host, we'll fill sbc in and let
+	 * the host deal with handling it correctly. This means
+	 * that for hosts that don't expose MMC_CAP_CMD23, no
+	 * change of behavior will be observed.
+	 *
+	 * N.B: Some MMC cards experience perf degradation.
+	 * We'll avoid using CMD23-bounded multiblock writes for
+	 * these, while retaining features like reliable writes.
+	 */
+	if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
+	    (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
+	     do_data_tag)) {
+		brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
+		brq->sbc.arg = brq->data.blocks |
+			(do_rel_wr ? (1 << 31) : 0) |
+			(do_data_tag ? (1 << 29) : 0);
+		brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
+		brq->mrq.sbc = &brq->sbc;
+	}
+}
+
+#define MMC_MAX_RETRIES		5
+#define MMC_DATA_RETRIES	2
+#define MMC_NO_RETRIES		(MMC_MAX_RETRIES + 1)
+
+static int mmc_blk_send_stop(struct mmc_card *card, unsigned int timeout)
+{
+	struct mmc_command cmd = {
+		.opcode = MMC_STOP_TRANSMISSION,
+		.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC,
+		/* Some hosts wait for busy anyway, so provide a busy timeout */
+		.busy_timeout = timeout,
+	};
+
+	return mmc_wait_for_cmd(card->host, &cmd, 5);
+}
+
+static int mmc_blk_fix_state(struct mmc_card *card, struct request *req)
+{
+	struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
+	struct mmc_blk_request *brq = &mqrq->brq;
+	unsigned int timeout = mmc_blk_data_timeout_ms(card->host, &brq->data);
+	int err;
+
+	mmc_retune_hold_now(card->host);
+
+	mmc_blk_send_stop(card, timeout);
+
+	err = card_busy_detect(card, timeout, NULL);
+
+	mmc_retune_release(card->host);
+
+	return err;
+}
+
+#define MMC_READ_SINGLE_RETRIES	2
+
+/* Single sector read during recovery */
+static void mmc_blk_read_single(struct mmc_queue *mq, struct request *req)
+{
+	struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
+	struct mmc_request *mrq = &mqrq->brq.mrq;
+	struct mmc_card *card = mq->card;
+	struct mmc_host *host = card->host;
+	blk_status_t error = BLK_STS_OK;
+
+	do {
+		u32 status;
+		int err;
+		int retries = 0;
+
+		while (retries++ <= MMC_READ_SINGLE_RETRIES) {
+			mmc_blk_rw_rq_prep(mqrq, card, 1, mq);
+
+			mmc_wait_for_req(host, mrq);
+
+			err = mmc_send_status(card, &status);
+			if (err)
+				goto error_exit;
+
+			if (!mmc_host_is_spi(host) &&
+			    !mmc_blk_in_tran_state(status)) {
+				err = mmc_blk_fix_state(card, req);
+				if (err)
+					goto error_exit;
+			}
+
+			if (!mrq->cmd->error)
+				break;
+		}
+
+		if (mrq->cmd->error ||
+		    mrq->data->error ||
+		    (!mmc_host_is_spi(host) &&
+		     (mrq->cmd->resp[0] & CMD_ERRORS || status & CMD_ERRORS)))
+			error = BLK_STS_IOERR;
+		else
+			error = BLK_STS_OK;
+
+	} while (blk_update_request(req, error, 512));
+
+	return;
+
+error_exit:
+	mrq->data->bytes_xfered = 0;
+	blk_update_request(req, BLK_STS_IOERR, 512);
+	/* Let it try the remaining request again */
+	if (mqrq->retries > MMC_MAX_RETRIES - 1)
+		mqrq->retries = MMC_MAX_RETRIES - 1;
+}
+
+static inline bool mmc_blk_oor_valid(struct mmc_blk_request *brq)
+{
+	return !!brq->mrq.sbc;
+}
+
+static inline u32 mmc_blk_stop_err_bits(struct mmc_blk_request *brq)
+{
+	return mmc_blk_oor_valid(brq) ? CMD_ERRORS : CMD_ERRORS_EXCL_OOR;
+}
+
+/*
+ * Check for errors the host controller driver might not have seen such as
+ * response mode errors or invalid card state.
+ */
+static bool mmc_blk_status_error(struct request *req, u32 status)
+{
+	struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
+	struct mmc_blk_request *brq = &mqrq->brq;
+	struct mmc_queue *mq = req->q->queuedata;
+	u32 stop_err_bits;
+
+	if (mmc_host_is_spi(mq->card->host))
+		return false;
+
+	stop_err_bits = mmc_blk_stop_err_bits(brq);
+
+	return brq->cmd.resp[0]  & CMD_ERRORS    ||
+	       brq->stop.resp[0] & stop_err_bits ||
+	       status            & stop_err_bits ||
+	       (rq_data_dir(req) == WRITE && !mmc_blk_in_tran_state(status));
+}
+
+static inline bool mmc_blk_cmd_started(struct mmc_blk_request *brq)
+{
+	return !brq->sbc.error && !brq->cmd.error &&
+	       !(brq->cmd.resp[0] & CMD_ERRORS);
+}
+
+/*
+ * Requests are completed by mmc_blk_mq_complete_rq() which sets simple
+ * policy:
+ * 1. A request that has transferred at least some data is considered
+ * successful and will be requeued if there is remaining data to
+ * transfer.
+ * 2. Otherwise the number of retries is incremented and the request
+ * will be requeued if there are remaining retries.
+ * 3. Otherwise the request will be errored out.
+ * That means mmc_blk_mq_complete_rq() is controlled by bytes_xfered and
+ * mqrq->retries. So there are only 4 possible actions here:
+ *	1. do not accept the bytes_xfered value i.e. set it to zero
+ *	2. change mqrq->retries to determine the number of retries
+ *	3. try to reset the card
+ *	4. read one sector at a time
+ */
+static void mmc_blk_mq_rw_recovery(struct mmc_queue *mq, struct request *req)
+{
+	int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
+	struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
+	struct mmc_blk_request *brq = &mqrq->brq;
+	struct mmc_blk_data *md = mq->blkdata;
+	struct mmc_card *card = mq->card;
+	u32 status;
+	u32 blocks;
+	int err;
+
+	/*
+	 * Some errors the host driver might not have seen. Set the number of
+	 * bytes transferred to zero in that case.
+	 */
+	err = __mmc_send_status(card, &status, 0);
+	if (err || mmc_blk_status_error(req, status))
+		brq->data.bytes_xfered = 0;
+
+	mmc_retune_release(card->host);
+
+	/*
+	 * Try again to get the status. This also provides an opportunity for
+	 * re-tuning.
+	 */
+	if (err)
+		err = __mmc_send_status(card, &status, 0);
+
+	/*
+	 * Nothing more to do after the number of bytes transferred has been
+	 * updated and there is no card.
+	 */
+	if (err && mmc_detect_card_removed(card->host))
+		return;
+
+	/* Try to get back to "tran" state */
+	if (!mmc_host_is_spi(mq->card->host) &&
+	    (err || !mmc_blk_in_tran_state(status)))
+		err = mmc_blk_fix_state(mq->card, req);
+
+	/*
+	 * Special case for SD cards where the card might record the number of
+	 * blocks written.
+	 */
+	if (!err && mmc_blk_cmd_started(brq) && mmc_card_sd(card) &&
+	    rq_data_dir(req) == WRITE) {
+		if (mmc_sd_num_wr_blocks(card, &blocks))
+			brq->data.bytes_xfered = 0;
+		else
+			brq->data.bytes_xfered = blocks << 9;
+	}
+
+	/* Reset if the card is in a bad state */
+	if (!mmc_host_is_spi(mq->card->host) &&
+	    err && mmc_blk_reset(md, card->host, type)) {
+		pr_err("%s: recovery failed!\n", req->rq_disk->disk_name);
+		mqrq->retries = MMC_NO_RETRIES;
+		return;
+	}
+
+	/*
+	 * If anything was done, just return and if there is anything remaining
+	 * on the request it will get requeued.
+	 */
+	if (brq->data.bytes_xfered)
+		return;
+
+	/* Reset before last retry */
+	if (mqrq->retries + 1 == MMC_MAX_RETRIES)
+		mmc_blk_reset(md, card->host, type);
+
+	/* Command errors fail fast, so use all MMC_MAX_RETRIES */
+	if (brq->sbc.error || brq->cmd.error)
+		return;
+
+	/* Reduce the remaining retries for data errors */
+	if (mqrq->retries < MMC_MAX_RETRIES - MMC_DATA_RETRIES) {
+		mqrq->retries = MMC_MAX_RETRIES - MMC_DATA_RETRIES;
+		return;
+	}
+
+	/* FIXME: Missing single sector read for large sector size */
+	if (!mmc_large_sector(card) && rq_data_dir(req) == READ &&
+	    brq->data.blocks > 1) {
+		/* Read one sector at a time */
+		mmc_blk_read_single(mq, req);
+		return;
+	}
+}
+
+static inline bool mmc_blk_rq_error(struct mmc_blk_request *brq)
+{
+	mmc_blk_eval_resp_error(brq);
+
+	return brq->sbc.error || brq->cmd.error || brq->stop.error ||
+	       brq->data.error || brq->cmd.resp[0] & CMD_ERRORS;
+}
+
+static int mmc_blk_card_busy(struct mmc_card *card, struct request *req)
+{
+	struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
+	u32 status = 0;
+	int err;
+
+	if (mmc_host_is_spi(card->host) || rq_data_dir(req) == READ)
+		return 0;
+
+	err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, &status);
+
+	/*
+	 * Do not assume data transferred correctly if there are any error bits
+	 * set.
+	 */
+	if (status & mmc_blk_stop_err_bits(&mqrq->brq)) {
+		mqrq->brq.data.bytes_xfered = 0;
+		err = err ? err : -EIO;
+	}
+
+	/* Copy the exception bit so it will be seen later on */
+	if (mmc_card_mmc(card) && status & R1_EXCEPTION_EVENT)
+		mqrq->brq.cmd.resp[0] |= R1_EXCEPTION_EVENT;
+
+	return err;
+}
+
+static inline void mmc_blk_rw_reset_success(struct mmc_queue *mq,
+					    struct request *req)
+{
+	int type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
+
+	mmc_blk_reset_success(mq->blkdata, type);
+}
+
+static void mmc_blk_mq_complete_rq(struct mmc_queue *mq, struct request *req)
+{
+	struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
+	unsigned int nr_bytes = mqrq->brq.data.bytes_xfered;
+
+	if (nr_bytes) {
+		if (blk_update_request(req, BLK_STS_OK, nr_bytes))
+			blk_mq_requeue_request(req, true);
+		else
+			__blk_mq_end_request(req, BLK_STS_OK);
+	} else if (!blk_rq_bytes(req)) {
+		__blk_mq_end_request(req, BLK_STS_IOERR);
+	} else if (mqrq->retries++ < MMC_MAX_RETRIES) {
+		blk_mq_requeue_request(req, true);
+	} else {
+		if (mmc_card_removed(mq->card))
+			req->rq_flags |= RQF_QUIET;
+		blk_mq_end_request(req, BLK_STS_IOERR);
+	}
+}
+
+static bool mmc_blk_urgent_bkops_needed(struct mmc_queue *mq,
+					struct mmc_queue_req *mqrq)
+{
+	return mmc_card_mmc(mq->card) && !mmc_host_is_spi(mq->card->host) &&
+	       (mqrq->brq.cmd.resp[0] & R1_EXCEPTION_EVENT ||
+		mqrq->brq.stop.resp[0] & R1_EXCEPTION_EVENT);
+}
+
+static void mmc_blk_urgent_bkops(struct mmc_queue *mq,
+				 struct mmc_queue_req *mqrq)
+{
+	if (mmc_blk_urgent_bkops_needed(mq, mqrq))
+		mmc_run_bkops(mq->card);
+}
+
+void mmc_blk_mq_complete(struct request *req)
+{
+	struct mmc_queue *mq = req->q->queuedata;
+
+	if (mq->use_cqe)
+		mmc_blk_cqe_complete_rq(mq, req);
+	else
+		mmc_blk_mq_complete_rq(mq, req);
+}
+
+static void mmc_blk_mq_poll_completion(struct mmc_queue *mq,
+				       struct request *req)
+{
+	struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
+	struct mmc_host *host = mq->card->host;
+
+	if (mmc_blk_rq_error(&mqrq->brq) ||
+	    mmc_blk_card_busy(mq->card, req)) {
+		mmc_blk_mq_rw_recovery(mq, req);
+	} else {
+		mmc_blk_rw_reset_success(mq, req);
+		mmc_retune_release(host);
+	}
+
+	mmc_blk_urgent_bkops(mq, mqrq);
+}
+
+static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, struct request *req)
+{
+	struct request_queue *q = req->q;
+	unsigned long flags;
+	bool put_card;
+
+	spin_lock_irqsave(q->queue_lock, flags);
+
+	mq->in_flight[mmc_issue_type(mq, req)] -= 1;
+
+	put_card = (mmc_tot_in_flight(mq) == 0);
+
+	spin_unlock_irqrestore(q->queue_lock, flags);
+
+	if (put_card)
+		mmc_put_card(mq->card, &mq->ctx);
+}
+
+static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req)
+{
+	struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
+	struct mmc_request *mrq = &mqrq->brq.mrq;
+	struct mmc_host *host = mq->card->host;
+
+	mmc_post_req(host, mrq, 0);
+
+	/*
+	 * Block layer timeouts race with completions which means the normal
+	 * completion path cannot be used during recovery.
+	 */
+	if (mq->in_recovery)
+		mmc_blk_mq_complete_rq(mq, req);
+	else
+		blk_mq_complete_request(req);
+
+	mmc_blk_mq_dec_in_flight(mq, req);
+}
+
+void mmc_blk_mq_recovery(struct mmc_queue *mq)
+{
+	struct request *req = mq->recovery_req;
+	struct mmc_host *host = mq->card->host;
+	struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
+
+	mq->recovery_req = NULL;
+	mq->rw_wait = false;
+
+	if (mmc_blk_rq_error(&mqrq->brq)) {
+		mmc_retune_hold_now(host);
+		mmc_blk_mq_rw_recovery(mq, req);
+	}
+
+	mmc_blk_urgent_bkops(mq, mqrq);
+
+	mmc_blk_mq_post_req(mq, req);
+}
+
+static void mmc_blk_mq_complete_prev_req(struct mmc_queue *mq,
+					 struct request **prev_req)
+{
+	if (mmc_host_done_complete(mq->card->host))
+		return;
+
+	mutex_lock(&mq->complete_lock);
+
+	if (!mq->complete_req)
+		goto out_unlock;
+
+	mmc_blk_mq_poll_completion(mq, mq->complete_req);
+
+	if (prev_req)
+		*prev_req = mq->complete_req;
+	else
+		mmc_blk_mq_post_req(mq, mq->complete_req);
+
+	mq->complete_req = NULL;
+
+out_unlock:
+	mutex_unlock(&mq->complete_lock);
+}
+
+void mmc_blk_mq_complete_work(struct work_struct *work)
+{
+	struct mmc_queue *mq = container_of(work, struct mmc_queue,
+					    complete_work);
+
+	mmc_blk_mq_complete_prev_req(mq, NULL);
+}
+
+static void mmc_blk_mq_req_done(struct mmc_request *mrq)
+{
+	struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req,
+						  brq.mrq);
+	struct request *req = mmc_queue_req_to_req(mqrq);
+	struct request_queue *q = req->q;
+	struct mmc_queue *mq = q->queuedata;
+	struct mmc_host *host = mq->card->host;
+	unsigned long flags;
+
+	if (!mmc_host_done_complete(host)) {
+		bool waiting;
+
+		/*
+		 * We cannot complete the request in this context, so record
+		 * that there is a request to complete, and that a following
+		 * request does not need to wait (although it does need to
+		 * complete complete_req first).
+		 */
+		spin_lock_irqsave(q->queue_lock, flags);
+		mq->complete_req = req;
+		mq->rw_wait = false;
+		waiting = mq->waiting;
+		spin_unlock_irqrestore(q->queue_lock, flags);
+
+		/*
+		 * If 'waiting' then the waiting task will complete this
+		 * request, otherwise queue a work to do it. Note that
+		 * complete_work may still race with the dispatch of a following
+		 * request.
+		 */
+		if (waiting)
+			wake_up(&mq->wait);
+		else
+			queue_work(mq->card->complete_wq, &mq->complete_work);
+
+		return;
+	}
+
+	/* Take the recovery path for errors or urgent background operations */
+	if (mmc_blk_rq_error(&mqrq->brq) ||
+	    mmc_blk_urgent_bkops_needed(mq, mqrq)) {
+		spin_lock_irqsave(q->queue_lock, flags);
+		mq->recovery_needed = true;
+		mq->recovery_req = req;
+		spin_unlock_irqrestore(q->queue_lock, flags);
+		wake_up(&mq->wait);
+		schedule_work(&mq->recovery_work);
+		return;
+	}
+
+	mmc_blk_rw_reset_success(mq, req);
+
+	mq->rw_wait = false;
+	wake_up(&mq->wait);
+
+	mmc_blk_mq_post_req(mq, req);
+}
+
+static bool mmc_blk_rw_wait_cond(struct mmc_queue *mq, int *err)
+{
+	struct request_queue *q = mq->queue;
+	unsigned long flags;
+	bool done;
+
+	/*
+	 * Wait while there is another request in progress, but not if recovery
+	 * is needed. Also indicate whether there is a request waiting to start.
+	 */
+	spin_lock_irqsave(q->queue_lock, flags);
+	if (mq->recovery_needed) {
+		*err = -EBUSY;
+		done = true;
+	} else {
+		done = !mq->rw_wait;
+	}
+	mq->waiting = !done;
+	spin_unlock_irqrestore(q->queue_lock, flags);
+
+	return done;
+}
+
+static int mmc_blk_rw_wait(struct mmc_queue *mq, struct request **prev_req)
+{
+	int err = 0;
+
+	wait_event(mq->wait, mmc_blk_rw_wait_cond(mq, &err));
+
+	/* Always complete the previous request if there is one */
+	mmc_blk_mq_complete_prev_req(mq, prev_req);
+
+	return err;
+}
+
+static int mmc_blk_mq_issue_rw_rq(struct mmc_queue *mq,
+				  struct request *req)
+{
+	struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
+	struct mmc_host *host = mq->card->host;
+	struct request *prev_req = NULL;
+	int err = 0;
+
+	mmc_blk_rw_rq_prep(mqrq, mq->card, 0, mq);
+
+	mqrq->brq.mrq.done = mmc_blk_mq_req_done;
+
+	mmc_pre_req(host, &mqrq->brq.mrq);
+
+	err = mmc_blk_rw_wait(mq, &prev_req);
+	if (err)
+		goto out_post_req;
+
+	mq->rw_wait = true;
+
+	err = mmc_start_request(host, &mqrq->brq.mrq);
+
+	if (prev_req)
+		mmc_blk_mq_post_req(mq, prev_req);
+
+	if (err)
+		mq->rw_wait = false;
+
+	/* Release re-tuning here where there is no synchronization required */
+	if (err || mmc_host_done_complete(host))
+		mmc_retune_release(host);
+
+out_post_req:
+	if (err)
+		mmc_post_req(host, &mqrq->brq.mrq, err);
+
+	return err;
+}
+
+static int mmc_blk_wait_for_idle(struct mmc_queue *mq, struct mmc_host *host)
+{
+	if (mq->use_cqe)
+		return host->cqe_ops->cqe_wait_for_idle(host);
+
+	return mmc_blk_rw_wait(mq, NULL);
+}
+
+enum mmc_issued mmc_blk_mq_issue_rq(struct mmc_queue *mq, struct request *req)
+{
+	struct mmc_blk_data *md = mq->blkdata;
+	struct mmc_card *card = md->queue.card;
+	struct mmc_host *host = card->host;
+	int ret;
+
+	ret = mmc_blk_part_switch(card, md->part_type);
+	if (ret)
+		return MMC_REQ_FAILED_TO_START;
+
+	switch (mmc_issue_type(mq, req)) {
+	case MMC_ISSUE_SYNC:
+		ret = mmc_blk_wait_for_idle(mq, host);
+		if (ret)
+			return MMC_REQ_BUSY;
+		switch (req_op(req)) {
+		case REQ_OP_DRV_IN:
+		case REQ_OP_DRV_OUT:
+			mmc_blk_issue_drv_op(mq, req);
+			break;
+		case REQ_OP_DISCARD:
+			mmc_blk_issue_discard_rq(mq, req);
+			break;
+		case REQ_OP_SECURE_ERASE:
+			mmc_blk_issue_secdiscard_rq(mq, req);
+			break;
+		case REQ_OP_FLUSH:
+			mmc_blk_issue_flush(mq, req);
+			break;
+		default:
+			WARN_ON_ONCE(1);
+			return MMC_REQ_FAILED_TO_START;
+		}
+		return MMC_REQ_FINISHED;
+	case MMC_ISSUE_DCMD:
+	case MMC_ISSUE_ASYNC:
+		switch (req_op(req)) {
+		case REQ_OP_FLUSH:
+			if (!mmc_cache_enabled(host)) {
+				blk_mq_end_request(req, BLK_STS_OK);
+				return MMC_REQ_FINISHED;
+			}
+			ret = mmc_blk_cqe_issue_flush(mq, req);
+			break;
+		case REQ_OP_READ:
+		case REQ_OP_WRITE:
+			if (mq->use_cqe)
+				ret = mmc_blk_cqe_issue_rw_rq(mq, req);
+			else
+				ret = mmc_blk_mq_issue_rw_rq(mq, req);
+			break;
+		default:
+			WARN_ON_ONCE(1);
+			ret = -EINVAL;
+		}
+		if (!ret)
+			return MMC_REQ_STARTED;
+		return ret == -EBUSY ? MMC_REQ_BUSY : MMC_REQ_FAILED_TO_START;
+	default:
+		WARN_ON_ONCE(1);
+		return MMC_REQ_FAILED_TO_START;
+	}
+}
+
+static inline int mmc_blk_readonly(struct mmc_card *card)
+{
+	return mmc_card_readonly(card) ||
+	       !(card->csd.cmdclass & CCC_BLOCK_WRITE);
+}
+
+static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
+					      struct device *parent,
+					      sector_t size,
+					      bool default_ro,
+					      const char *subname,
+					      int area_type)
+{
+	struct mmc_blk_data *md;
+	int devidx, ret;
+
+	devidx = ida_simple_get(&mmc_blk_ida, 0, max_devices, GFP_KERNEL);
+	if (devidx < 0) {
+		/*
+		 * We get -ENOSPC because there are no more any available
+		 * devidx. The reason may be that, either userspace haven't yet
+		 * unmounted the partitions, which postpones mmc_blk_release()
+		 * from being called, or the device has more partitions than
+		 * what we support.
+		 */
+		if (devidx == -ENOSPC)
+			dev_err(mmc_dev(card->host),
+				"no more device IDs available\n");
+
+		return ERR_PTR(devidx);
+	}
+
+	md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
+	if (!md) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	md->area_type = area_type;
+
+	/*
+	 * Set the read-only status based on the supported commands
+	 * and the write protect switch.
+	 */
+	md->read_only = mmc_blk_readonly(card);
+
+	md->disk = alloc_disk(perdev_minors);
+	if (md->disk == NULL) {
+		ret = -ENOMEM;
+		goto err_kfree;
+	}
+
+	spin_lock_init(&md->lock);
+	INIT_LIST_HEAD(&md->part);
+	INIT_LIST_HEAD(&md->rpmbs);
+	md->usage = 1;
+
+	ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
+	if (ret)
+		goto err_putdisk;
+
+	md->queue.blkdata = md;
+
+	/*
+	 * Keep an extra reference to the queue so that we can shutdown the
+	 * queue (i.e. call blk_cleanup_queue()) while there are still
+	 * references to the 'md'. The corresponding blk_put_queue() is in
+	 * mmc_blk_put().
+	 */
+	if (!blk_get_queue(md->queue.queue)) {
+		mmc_cleanup_queue(&md->queue);
+		ret = -ENODEV;
+		goto err_putdisk;
+	}
+
+	md->disk->major	= MMC_BLOCK_MAJOR;
+	md->disk->first_minor = devidx * perdev_minors;
+	md->disk->fops = &mmc_bdops;
+	md->disk->private_data = md;
+	md->disk->queue = md->queue.queue;
+	md->parent = parent;
+	set_disk_ro(md->disk, md->read_only || default_ro);
+	md->disk->flags = GENHD_FL_EXT_DEVT;
+	if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
+		md->disk->flags |= GENHD_FL_NO_PART_SCAN
+				   | GENHD_FL_SUPPRESS_PARTITION_INFO;
+
+	/*
+	 * As discussed on lkml, GENHD_FL_REMOVABLE should:
+	 *
+	 * - be set for removable media with permanent block devices
+	 * - be unset for removable block devices with permanent media
+	 *
+	 * Since MMC block devices clearly fall under the second
+	 * case, we do not set GENHD_FL_REMOVABLE.  Userspace
+	 * should use the block device creation/destruction hotplug
+	 * messages to tell when the card is present.
+	 */
+
+	snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
+		 "mmcblk%u%s", card->host->index, subname ? subname : "");
+
+	set_capacity(md->disk, size);
+
+	if (mmc_host_cmd23(card->host)) {
+		if ((mmc_card_mmc(card) &&
+		     card->csd.mmca_vsn >= CSD_SPEC_VER_3) ||
+		    (mmc_card_sd(card) &&
+		     card->scr.cmds & SD_SCR_CMD23_SUPPORT))
+			md->flags |= MMC_BLK_CMD23;
+	}
+
+	if (mmc_card_mmc(card) &&
+	    md->flags & MMC_BLK_CMD23 &&
+	    ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
+	     card->ext_csd.rel_sectors)) {
+		md->flags |= MMC_BLK_REL_WR;
+		blk_queue_write_cache(md->queue.queue, true, true);
+	}
+
+	return md;
+
+ err_putdisk:
+	put_disk(md->disk);
+ err_kfree:
+	kfree(md);
+ out:
+	ida_simple_remove(&mmc_blk_ida, devidx);
+	return ERR_PTR(ret);
+}
+
+static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
+{
+	sector_t size;
+
+	if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
+		/*
+		 * The EXT_CSD sector count is in number or 512 byte
+		 * sectors.
+		 */
+		size = card->ext_csd.sectors;
+	} else {
+		/*
+		 * The CSD capacity field is in units of read_blkbits.
+		 * set_capacity takes units of 512 bytes.
+		 */
+		size = (typeof(sector_t))card->csd.capacity
+			<< (card->csd.read_blkbits - 9);
+	}
+
+	return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
+					MMC_BLK_DATA_AREA_MAIN);
+}
+
+static int mmc_blk_alloc_part(struct mmc_card *card,
+			      struct mmc_blk_data *md,
+			      unsigned int part_type,
+			      sector_t size,
+			      bool default_ro,
+			      const char *subname,
+			      int area_type)
+{
+	char cap_str[10];
+	struct mmc_blk_data *part_md;
+
+	part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
+				    subname, area_type);
+	if (IS_ERR(part_md))
+		return PTR_ERR(part_md);
+	part_md->part_type = part_type;
+	list_add(&part_md->part, &md->part);
+
+	string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
+			cap_str, sizeof(cap_str));
+	pr_info("%s: %s %s partition %u %s\n",
+	       part_md->disk->disk_name, mmc_card_id(card),
+	       mmc_card_name(card), part_md->part_type, cap_str);
+	return 0;
+}
+
+/**
+ * mmc_rpmb_ioctl() - ioctl handler for the RPMB chardev
+ * @filp: the character device file
+ * @cmd: the ioctl() command
+ * @arg: the argument from userspace
+ *
+ * This will essentially just redirect the ioctl()s coming in over to
+ * the main block device spawning the RPMB character device.
+ */
+static long mmc_rpmb_ioctl(struct file *filp, unsigned int cmd,
+			   unsigned long arg)
+{
+	struct mmc_rpmb_data *rpmb = filp->private_data;
+	int ret;
+
+	switch (cmd) {
+	case MMC_IOC_CMD:
+		ret = mmc_blk_ioctl_cmd(rpmb->md,
+					(struct mmc_ioc_cmd __user *)arg,
+					rpmb);
+		break;
+	case MMC_IOC_MULTI_CMD:
+		ret = mmc_blk_ioctl_multi_cmd(rpmb->md,
+					(struct mmc_ioc_multi_cmd __user *)arg,
+					rpmb);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+#ifdef CONFIG_COMPAT
+static long mmc_rpmb_ioctl_compat(struct file *filp, unsigned int cmd,
+			      unsigned long arg)
+{
+	return mmc_rpmb_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
+static int mmc_rpmb_chrdev_open(struct inode *inode, struct file *filp)
+{
+	struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev,
+						  struct mmc_rpmb_data, chrdev);
+
+	get_device(&rpmb->dev);
+	filp->private_data = rpmb;
+	mmc_blk_get(rpmb->md->disk);
+
+	return nonseekable_open(inode, filp);
+}
+
+static int mmc_rpmb_chrdev_release(struct inode *inode, struct file *filp)
+{
+	struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev,
+						  struct mmc_rpmb_data, chrdev);
+
+	mmc_blk_put(rpmb->md);
+	put_device(&rpmb->dev);
+
+	return 0;
+}
+
+static const struct file_operations mmc_rpmb_fileops = {
+	.release = mmc_rpmb_chrdev_release,
+	.open = mmc_rpmb_chrdev_open,
+	.owner = THIS_MODULE,
+	.llseek = no_llseek,
+	.unlocked_ioctl = mmc_rpmb_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl = mmc_rpmb_ioctl_compat,
+#endif
+};
+
+static void mmc_blk_rpmb_device_release(struct device *dev)
+{
+	struct mmc_rpmb_data *rpmb = dev_get_drvdata(dev);
+
+	ida_simple_remove(&mmc_rpmb_ida, rpmb->id);
+	kfree(rpmb);
+}
+
+static int mmc_blk_alloc_rpmb_part(struct mmc_card *card,
+				   struct mmc_blk_data *md,
+				   unsigned int part_index,
+				   sector_t size,
+				   const char *subname)
+{
+	int devidx, ret;
+	char rpmb_name[DISK_NAME_LEN];
+	char cap_str[10];
+	struct mmc_rpmb_data *rpmb;
+
+	/* This creates the minor number for the RPMB char device */
+	devidx = ida_simple_get(&mmc_rpmb_ida, 0, max_devices, GFP_KERNEL);
+	if (devidx < 0)
+		return devidx;
+
+	rpmb = kzalloc(sizeof(*rpmb), GFP_KERNEL);
+	if (!rpmb) {
+		ida_simple_remove(&mmc_rpmb_ida, devidx);
+		return -ENOMEM;
+	}
+
+	snprintf(rpmb_name, sizeof(rpmb_name),
+		 "mmcblk%u%s", card->host->index, subname ? subname : "");
+
+	rpmb->id = devidx;
+	rpmb->part_index = part_index;
+	rpmb->dev.init_name = rpmb_name;
+	rpmb->dev.bus = &mmc_rpmb_bus_type;
+	rpmb->dev.devt = MKDEV(MAJOR(mmc_rpmb_devt), rpmb->id);
+	rpmb->dev.parent = &card->dev;
+	rpmb->dev.release = mmc_blk_rpmb_device_release;
+	device_initialize(&rpmb->dev);
+	dev_set_drvdata(&rpmb->dev, rpmb);
+	rpmb->md = md;
+
+	cdev_init(&rpmb->chrdev, &mmc_rpmb_fileops);
+	rpmb->chrdev.owner = THIS_MODULE;
+	ret = cdev_device_add(&rpmb->chrdev, &rpmb->dev);
+	if (ret) {
+		pr_err("%s: could not add character device\n", rpmb_name);
+		goto out_put_device;
+	}
+
+	list_add(&rpmb->node, &md->rpmbs);
+
+	string_get_size((u64)size, 512, STRING_UNITS_2,
+			cap_str, sizeof(cap_str));
+
+	pr_info("%s: %s %s partition %u %s, chardev (%d:%d)\n",
+		rpmb_name, mmc_card_id(card),
+		mmc_card_name(card), EXT_CSD_PART_CONFIG_ACC_RPMB, cap_str,
+		MAJOR(mmc_rpmb_devt), rpmb->id);
+
+	return 0;
+
+out_put_device:
+	put_device(&rpmb->dev);
+	return ret;
+}
+
+static void mmc_blk_remove_rpmb_part(struct mmc_rpmb_data *rpmb)
+
+{
+	cdev_device_del(&rpmb->chrdev, &rpmb->dev);
+	put_device(&rpmb->dev);
+}
+
+/* MMC Physical partitions consist of two boot partitions and
+ * up to four general purpose partitions.
+ * For each partition enabled in EXT_CSD a block device will be allocatedi
+ * to provide access to the partition.
+ */
+
+static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
+{
+	int idx, ret;
+
+	if (!mmc_card_mmc(card))
+		return 0;
+
+	for (idx = 0; idx < card->nr_parts; idx++) {
+		if (card->part[idx].area_type & MMC_BLK_DATA_AREA_RPMB) {
+			/*
+			 * RPMB partitions does not provide block access, they
+			 * are only accessed using ioctl():s. Thus create
+			 * special RPMB block devices that do not have a
+			 * backing block queue for these.
+			 */
+			ret = mmc_blk_alloc_rpmb_part(card, md,
+				card->part[idx].part_cfg,
+				card->part[idx].size >> 9,
+				card->part[idx].name);
+			if (ret)
+				return ret;
+		} else if (card->part[idx].size) {
+			ret = mmc_blk_alloc_part(card, md,
+				card->part[idx].part_cfg,
+				card->part[idx].size >> 9,
+				card->part[idx].force_ro,
+				card->part[idx].name,
+				card->part[idx].area_type);
+			if (ret)
+				return ret;
+		}
+	}
+
+	return 0;
+}
+
+static void mmc_blk_remove_req(struct mmc_blk_data *md)
+{
+	struct mmc_card *card;
+
+	if (md) {
+		/*
+		 * Flush remaining requests and free queues. It
+		 * is freeing the queue that stops new requests
+		 * from being accepted.
+		 */
+		card = md->queue.card;
+		if (md->disk->flags & GENHD_FL_UP) {
+			device_remove_file(disk_to_dev(md->disk), &md->force_ro);
+			if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
+					card->ext_csd.boot_ro_lockable)
+				device_remove_file(disk_to_dev(md->disk),
+					&md->power_ro_lock);
+
+			del_gendisk(md->disk);
+		}
+		mmc_cleanup_queue(&md->queue);
+		mmc_blk_put(md);
+	}
+}
+
+static void mmc_blk_remove_parts(struct mmc_card *card,
+				 struct mmc_blk_data *md)
+{
+	struct list_head *pos, *q;
+	struct mmc_blk_data *part_md;
+	struct mmc_rpmb_data *rpmb;
+
+	/* Remove RPMB partitions */
+	list_for_each_safe(pos, q, &md->rpmbs) {
+		rpmb = list_entry(pos, struct mmc_rpmb_data, node);
+		list_del(pos);
+		mmc_blk_remove_rpmb_part(rpmb);
+	}
+	/* Remove block partitions */
+	list_for_each_safe(pos, q, &md->part) {
+		part_md = list_entry(pos, struct mmc_blk_data, part);
+		list_del(pos);
+		mmc_blk_remove_req(part_md);
+	}
+}
+
+static int mmc_add_disk(struct mmc_blk_data *md)
+{
+	int ret;
+	struct mmc_card *card = md->queue.card;
+
+	device_add_disk(md->parent, md->disk, NULL);
+	md->force_ro.show = force_ro_show;
+	md->force_ro.store = force_ro_store;
+	sysfs_attr_init(&md->force_ro.attr);
+	md->force_ro.attr.name = "force_ro";
+	md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
+	ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
+	if (ret)
+		goto force_ro_fail;
+
+	if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
+	     card->ext_csd.boot_ro_lockable) {
+		umode_t mode;
+
+		if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
+			mode = S_IRUGO;
+		else
+			mode = S_IRUGO | S_IWUSR;
+
+		md->power_ro_lock.show = power_ro_lock_show;
+		md->power_ro_lock.store = power_ro_lock_store;
+		sysfs_attr_init(&md->power_ro_lock.attr);
+		md->power_ro_lock.attr.mode = mode;
+		md->power_ro_lock.attr.name =
+					"ro_lock_until_next_power_on";
+		ret = device_create_file(disk_to_dev(md->disk),
+				&md->power_ro_lock);
+		if (ret)
+			goto power_ro_lock_fail;
+	}
+	return ret;
+
+power_ro_lock_fail:
+	device_remove_file(disk_to_dev(md->disk), &md->force_ro);
+force_ro_fail:
+	del_gendisk(md->disk);
+
+	return ret;
+}
+
+#ifdef CONFIG_DEBUG_FS
+
+static int mmc_dbg_card_status_get(void *data, u64 *val)
+{
+	struct mmc_card *card = data;
+	struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
+	struct mmc_queue *mq = &md->queue;
+	struct request *req;
+	int ret;
+
+	/* Ask the block layer about the card status */
+	req = blk_get_request(mq->queue, REQ_OP_DRV_IN, 0);
+	if (IS_ERR(req))
+		return PTR_ERR(req);
+	req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_CARD_STATUS;
+	blk_execute_rq(mq->queue, NULL, req, 0);
+	ret = req_to_mmc_queue_req(req)->drv_op_result;
+	if (ret >= 0) {
+		*val = ret;
+		ret = 0;
+	}
+	blk_put_request(req);
+
+	return ret;
+}
+DEFINE_SIMPLE_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
+		NULL, "%08llx\n");
+
+/* That is two digits * 512 + 1 for newline */
+#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;
+	struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
+	struct mmc_queue *mq = &md->queue;
+	struct request *req;
+	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;
+
+	/* Ask the block layer for the EXT CSD */
+	req = blk_get_request(mq->queue, REQ_OP_DRV_IN, 0);
+	if (IS_ERR(req)) {
+		err = PTR_ERR(req);
+		goto out_free;
+	}
+	req_to_mmc_queue_req(req)->drv_op = MMC_DRV_OP_GET_EXT_CSD;
+	req_to_mmc_queue_req(req)->drv_op_data = &ext_csd;
+	blk_execute_rq(mq->queue, NULL, req, 0);
+	err = req_to_mmc_queue_req(req)->drv_op_result;
+	blk_put_request(req);
+	if (err) {
+		pr_err("FAILED %d\n", err);
+		goto out_free;
+	}
+
+	for (i = 0; i < 512; i++)
+		n += sprintf(buf + n, "%02x", ext_csd[i]);
+	n += sprintf(buf + n, "\n");
+
+	if (n != EXT_CSD_STR_LEN) {
+		err = -EINVAL;
+		kfree(ext_csd);
+		goto out_free;
+	}
+
+	filp->private_data = buf;
+	kfree(ext_csd);
+	return 0;
+
+out_free:
+	kfree(buf);
+	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,
+};
+
+static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md)
+{
+	struct dentry *root;
+
+	if (!card->debugfs_root)
+		return 0;
+
+	root = card->debugfs_root;
+
+	if (mmc_card_mmc(card) || mmc_card_sd(card)) {
+		md->status_dentry =
+			debugfs_create_file("status", S_IRUSR, root, card,
+					    &mmc_dbg_card_status_fops);
+		if (!md->status_dentry)
+			return -EIO;
+	}
+
+	if (mmc_card_mmc(card)) {
+		md->ext_csd_dentry =
+			debugfs_create_file("ext_csd", S_IRUSR, root, card,
+					    &mmc_dbg_ext_csd_fops);
+		if (!md->ext_csd_dentry)
+			return -EIO;
+	}
+
+	return 0;
+}
+
+static void mmc_blk_remove_debugfs(struct mmc_card *card,
+				   struct mmc_blk_data *md)
+{
+	if (!card->debugfs_root)
+		return;
+
+	if (!IS_ERR_OR_NULL(md->status_dentry)) {
+		debugfs_remove(md->status_dentry);
+		md->status_dentry = NULL;
+	}
+
+	if (!IS_ERR_OR_NULL(md->ext_csd_dentry)) {
+		debugfs_remove(md->ext_csd_dentry);
+		md->ext_csd_dentry = NULL;
+	}
+}
+
+#else
+
+static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md)
+{
+	return 0;
+}
+
+static void mmc_blk_remove_debugfs(struct mmc_card *card,
+				   struct mmc_blk_data *md)
+{
+}
+
+#endif /* CONFIG_DEBUG_FS */
+
+static int mmc_blk_probe(struct mmc_card *card)
+{
+	struct mmc_blk_data *md, *part_md;
+	char cap_str[10];
+
+	/*
+	 * Check that the card supports the command class(es) we need.
+	 */
+	if (!(card->csd.cmdclass & CCC_BLOCK_READ))
+		return -ENODEV;
+
+	mmc_fixup_device(card, mmc_blk_fixups);
+
+	card->complete_wq = alloc_workqueue("mmc_complete",
+					WQ_MEM_RECLAIM | WQ_HIGHPRI, 0);
+	if (unlikely(!card->complete_wq)) {
+		pr_err("Failed to create mmc completion workqueue");
+		return -ENOMEM;
+	}
+
+	md = mmc_blk_alloc(card);
+	if (IS_ERR(md))
+		return PTR_ERR(md);
+
+	string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
+			cap_str, sizeof(cap_str));
+	pr_info("%s: %s %s %s %s\n",
+		md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
+		cap_str, md->read_only ? "(ro)" : "");
+
+	if (mmc_blk_alloc_parts(card, md))
+		goto out;
+
+	dev_set_drvdata(&card->dev, md);
+
+	if (mmc_add_disk(md))
+		goto out;
+
+	list_for_each_entry(part_md, &md->part, part) {
+		if (mmc_add_disk(part_md))
+			goto out;
+	}
+
+	/* Add two debugfs entries */
+	mmc_blk_add_debugfs(card, md);
+
+	pm_runtime_set_autosuspend_delay(&card->dev, 3000);
+	pm_runtime_use_autosuspend(&card->dev);
+
+	/*
+	 * Don't enable runtime PM for SD-combo cards here. Leave that
+	 * decision to be taken during the SDIO init sequence instead.
+	 */
+	if (card->type != MMC_TYPE_SD_COMBO) {
+		pm_runtime_set_active(&card->dev);
+		pm_runtime_enable(&card->dev);
+	}
+
+	return 0;
+
+ out:
+	mmc_blk_remove_parts(card, md);
+	mmc_blk_remove_req(md);
+	return 0;
+}
+
+static void mmc_blk_remove(struct mmc_card *card)
+{
+	struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
+
+	mmc_blk_remove_debugfs(card, md);
+	mmc_blk_remove_parts(card, md);
+	pm_runtime_get_sync(&card->dev);
+	if (md->part_curr != md->part_type) {
+		mmc_claim_host(card->host);
+		mmc_blk_part_switch(card, md->part_type);
+		mmc_release_host(card->host);
+	}
+	if (card->type != MMC_TYPE_SD_COMBO)
+		pm_runtime_disable(&card->dev);
+	pm_runtime_put_noidle(&card->dev);
+	mmc_blk_remove_req(md);
+	dev_set_drvdata(&card->dev, NULL);
+	destroy_workqueue(card->complete_wq);
+}
+
+static int _mmc_blk_suspend(struct mmc_card *card)
+{
+	struct mmc_blk_data *part_md;
+	struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
+
+	if (md) {
+		mmc_queue_suspend(&md->queue);
+		list_for_each_entry(part_md, &md->part, part) {
+			mmc_queue_suspend(&part_md->queue);
+		}
+	}
+	return 0;
+}
+
+static void mmc_blk_shutdown(struct mmc_card *card)
+{
+	_mmc_blk_suspend(card);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int mmc_blk_suspend(struct device *dev)
+{
+	struct mmc_card *card = mmc_dev_to_card(dev);
+
+	return _mmc_blk_suspend(card);
+}
+
+static int mmc_blk_resume(struct device *dev)
+{
+	struct mmc_blk_data *part_md;
+	struct mmc_blk_data *md = dev_get_drvdata(dev);
+
+	if (md) {
+		/*
+		 * Resume involves the card going into idle state,
+		 * so current partition is always the main one.
+		 */
+		md->part_curr = md->part_type;
+		mmc_queue_resume(&md->queue);
+		list_for_each_entry(part_md, &md->part, part) {
+			mmc_queue_resume(&part_md->queue);
+		}
+	}
+	return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
+
+static struct mmc_driver mmc_driver = {
+	.drv		= {
+		.name	= "mmcblk",
+		.pm	= &mmc_blk_pm_ops,
+	},
+	.probe		= mmc_blk_probe,
+	.remove		= mmc_blk_remove,
+	.shutdown	= mmc_blk_shutdown,
+};
+
+static int __init mmc_blk_init(void)
+{
+	int res;
+
+	res  = bus_register(&mmc_rpmb_bus_type);
+	if (res < 0) {
+		pr_err("mmcblk: could not register RPMB bus type\n");
+		return res;
+	}
+	res = alloc_chrdev_region(&mmc_rpmb_devt, 0, MAX_DEVICES, "rpmb");
+	if (res < 0) {
+		pr_err("mmcblk: failed to allocate rpmb chrdev region\n");
+		goto out_bus_unreg;
+	}
+
+	if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
+		pr_info("mmcblk: using %d minors per device\n", perdev_minors);
+
+	max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
+
+	res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
+	if (res)
+		goto out_chrdev_unreg;
+
+	res = mmc_register_driver(&mmc_driver);
+	if (res)
+		goto out_blkdev_unreg;
+
+	return 0;
+
+out_blkdev_unreg:
+	unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
+out_chrdev_unreg:
+	unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES);
+out_bus_unreg:
+	bus_unregister(&mmc_rpmb_bus_type);
+	return res;
+}
+
+static void __exit mmc_blk_exit(void)
+{
+	mmc_unregister_driver(&mmc_driver);
+	unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
+	unregister_chrdev_region(mmc_rpmb_devt, MAX_DEVICES);
+	bus_unregister(&mmc_rpmb_bus_type);
+}
+
+module_init(mmc_blk_init);
+module_exit(mmc_blk_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
+
diff --git a/drivers/mmc/core/block.h b/drivers/mmc/core/block.h
new file mode 100644
index 000000000..31153f656
--- /dev/null
+++ b/drivers/mmc/core/block.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _MMC_CORE_BLOCK_H
+#define _MMC_CORE_BLOCK_H
+
+struct mmc_queue;
+struct request;
+
+void mmc_blk_cqe_recovery(struct mmc_queue *mq);
+
+enum mmc_issued;
+
+enum mmc_issued mmc_blk_mq_issue_rq(struct mmc_queue *mq, struct request *req);
+void mmc_blk_mq_complete(struct request *req);
+void mmc_blk_mq_recovery(struct mmc_queue *mq);
+
+struct work_struct;
+
+void mmc_blk_mq_complete_work(struct work_struct *work);
+
+#endif
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
new file mode 100644
index 000000000..941f39ca4
--- /dev/null
+++ b/drivers/mmc/core/bus.c
@@ -0,0 +1,397 @@
+/*
+ *  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/of.h>
+#include <linux/pm_runtime.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+
+#include "core.h"
+#include "card.h"
+#include "host.h"
+#include "sdio_cis.h"
+#include "bus.h"
+
+#define to_mmc_driver(d)	container_of(d, struct mmc_driver, drv)
+
+static ssize_t 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 DEVICE_ATTR_RO(type);
+
+static struct attribute *mmc_dev_attrs[] = {
+	&dev_attr_type.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(mmc_dev);
+
+/*
+ * 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 void mmc_bus_shutdown(struct device *dev)
+{
+	struct mmc_driver *drv = to_mmc_driver(dev->driver);
+	struct mmc_card *card = mmc_dev_to_card(dev);
+	struct mmc_host *host = card->host;
+	int ret;
+
+	if (dev->driver && drv->shutdown)
+		drv->shutdown(card);
+
+	if (host->bus_ops->shutdown) {
+		ret = host->bus_ops->shutdown(host);
+		if (ret)
+			pr_warn("%s: error %d during shutdown\n",
+				mmc_hostname(host), ret);
+	}
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int mmc_bus_suspend(struct device *dev)
+{
+	struct mmc_card *card = mmc_dev_to_card(dev);
+	struct mmc_host *host = card->host;
+	int ret;
+
+	ret = pm_generic_suspend(dev);
+	if (ret)
+		return ret;
+
+	ret = host->bus_ops->suspend(host);
+	if (ret)
+		pm_generic_resume(dev);
+
+	return ret;
+}
+
+static int mmc_bus_resume(struct device *dev)
+{
+	struct mmc_card *card = mmc_dev_to_card(dev);
+	struct mmc_host *host = card->host;
+	int ret;
+
+	ret = host->bus_ops->resume(host);
+	if (ret)
+		pr_warn("%s: error %d during resume (card was removed?)\n",
+			mmc_hostname(host), ret);
+
+	ret = pm_generic_resume(dev);
+	return ret;
+}
+#endif
+
+#ifdef CONFIG_PM
+static int mmc_runtime_suspend(struct device *dev)
+{
+	struct mmc_card *card = mmc_dev_to_card(dev);
+	struct mmc_host *host = card->host;
+
+	return host->bus_ops->runtime_suspend(host);
+}
+
+static int mmc_runtime_resume(struct device *dev)
+{
+	struct mmc_card *card = mmc_dev_to_card(dev);
+	struct mmc_host *host = card->host;
+
+	return host->bus_ops->runtime_resume(host);
+}
+#endif /* !CONFIG_PM */
+
+static const struct dev_pm_ops mmc_bus_pm_ops = {
+	SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
+};
+
+static struct bus_type mmc_bus_type = {
+	.name		= "mmc",
+	.dev_groups	= mmc_dev_groups,
+	.match		= mmc_bus_match,
+	.uevent		= mmc_bus_uevent,
+	.probe		= mmc_bus_probe,
+	.remove		= mmc_bus_remove,
+	.shutdown	= mmc_bus_shutdown,
+	.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);
+
+	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_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_hs(card) ? "high speed " : "",
+			mmc_card_ddr52(card) ? "DDR " : "",
+			type);
+	} else {
+		pr_info("%s: new %s%s%s%s%s%s card at address %04x\n",
+			mmc_hostname(card->host),
+			mmc_card_uhs(card) ? "ultra high speed " :
+			(mmc_card_hs(card) ? "high speed " : ""),
+			mmc_card_hs400(card) ? "HS400 " :
+			(mmc_card_hs200(card) ? "HS200 " : ""),
+			mmc_card_hs400es(card) ? "Enhanced strobe " : "",
+			mmc_card_ddr52(card) ? "DDR " : "",
+			uhs_bus_speed_mode, type, card->rca);
+	}
+
+#ifdef CONFIG_DEBUG_FS
+	mmc_add_card_debugfs(card);
+#endif
+	card->dev.of_node = mmc_of_find_child_device(card->host, 0);
+
+	device_enable_async_suspend(&card->dev);
+
+	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)
+{
+	struct mmc_host *host = card->host;
+
+#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);
+		of_node_put(card->dev.of_node);
+	}
+
+	if (host->cqe_enabled) {
+		host->cqe_ops->cqe_disable(host);
+		host->cqe_enabled = false;
+	}
+
+	put_device(&card->dev);
+}
diff --git a/drivers/mmc/core/bus.h b/drivers/mmc/core/bus.h
new file mode 100644
index 000000000..72b0ef03f
--- /dev/null
+++ b/drivers/mmc/core/bus.h
@@ -0,0 +1,45 @@
+/*
+ *  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
+
+#include <linux/device.h>
+
+struct mmc_host;
+struct mmc_card;
+
+#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);
+
+struct mmc_driver {
+	struct device_driver drv;
+	int (*probe)(struct mmc_card *card);
+	void (*remove)(struct mmc_card *card);
+	void (*shutdown)(struct mmc_card *card);
+};
+
+int mmc_register_driver(struct mmc_driver *drv);
+void mmc_unregister_driver(struct mmc_driver *drv);
+
+#endif
diff --git a/drivers/mmc/core/card.h b/drivers/mmc/core/card.h
new file mode 100644
index 000000000..eef301452
--- /dev/null
+++ b/drivers/mmc/core/card.h
@@ -0,0 +1,226 @@
+/*
+ * Private header for the mmc subsystem
+ *
+ * Copyright (C) 2016 Linaro Ltd
+ *
+ * Author: Ulf Hansson <ulf.hansson@linaro.org>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef _MMC_CORE_CARD_H
+#define _MMC_CORE_CARD_H
+
+#include <linux/mmc/card.h>
+
+#define mmc_card_name(c)	((c)->cid.prod_name)
+#define mmc_card_id(c)		(dev_name(&(c)->dev))
+#define mmc_dev_to_card(d)	container_of(d, struct mmc_card, dev)
+
+/* Card states */
+#define MMC_STATE_PRESENT	(1<<0)		/* present in sysfs */
+#define MMC_STATE_READONLY	(1<<1)		/* card is read-only */
+#define MMC_STATE_BLOCKADDR	(1<<2)		/* card uses block-addressing */
+#define MMC_CARD_SDXC		(1<<3)		/* card is SDXC */
+#define MMC_CARD_REMOVED	(1<<4)		/* card has been removed */
+#define MMC_STATE_SUSPENDED	(1<<5)		/* card is suspended */
+
+#define mmc_card_present(c)	((c)->state & MMC_STATE_PRESENT)
+#define mmc_card_readonly(c)	((c)->state & MMC_STATE_READONLY)
+#define mmc_card_blockaddr(c)	((c)->state & MMC_STATE_BLOCKADDR)
+#define mmc_card_ext_capacity(c) ((c)->state & MMC_CARD_SDXC)
+#define mmc_card_removed(c)	((c) && ((c)->state & MMC_CARD_REMOVED))
+#define mmc_card_suspended(c)	((c)->state & MMC_STATE_SUSPENDED)
+
+#define mmc_card_set_present(c)	((c)->state |= MMC_STATE_PRESENT)
+#define mmc_card_set_readonly(c) ((c)->state |= MMC_STATE_READONLY)
+#define mmc_card_set_blockaddr(c) ((c)->state |= MMC_STATE_BLOCKADDR)
+#define mmc_card_set_ext_capacity(c) ((c)->state |= MMC_CARD_SDXC)
+#define mmc_card_set_removed(c) ((c)->state |= MMC_CARD_REMOVED)
+#define mmc_card_set_suspended(c) ((c)->state |= MMC_STATE_SUSPENDED)
+#define mmc_card_clr_suspended(c) ((c)->state &= ~MMC_STATE_SUSPENDED)
+
+/*
+ * The world is not perfect and supplies us with broken mmc/sdio devices.
+ * For at least some of these bugs we need a work-around.
+ */
+struct mmc_fixup {
+	/* CID-specific fields. */
+	const char *name;
+
+	/* Valid revision range */
+	u64 rev_start, rev_end;
+
+	unsigned int manfid;
+	unsigned short oemid;
+
+	/* SDIO-specific fields. You can use SDIO_ANY_ID here of course */
+	u16 cis_vendor, cis_device;
+
+	/* for MMC cards */
+	unsigned int ext_csd_rev;
+
+	void (*vendor_fixup)(struct mmc_card *card, int data);
+	int data;
+};
+
+#define CID_MANFID_ANY (-1u)
+#define CID_OEMID_ANY ((unsigned short) -1)
+#define CID_NAME_ANY (NULL)
+
+#define EXT_CSD_REV_ANY (-1u)
+
+#define CID_MANFID_SANDISK      0x2
+#define CID_MANFID_ATP          0x9
+#define CID_MANFID_TOSHIBA      0x11
+#define CID_MANFID_MICRON       0x13
+#define CID_MANFID_SAMSUNG      0x15
+#define CID_MANFID_APACER       0x27
+#define CID_MANFID_KINGSTON     0x70
+#define CID_MANFID_HYNIX	0x90
+#define CID_MANFID_NUMONYX	0xFE
+
+#define END_FIXUP { NULL }
+
+#define _FIXUP_EXT(_name, _manfid, _oemid, _rev_start, _rev_end,	\
+		   _cis_vendor, _cis_device,				\
+		   _fixup, _data, _ext_csd_rev)				\
+	{						\
+		.name = (_name),			\
+		.manfid = (_manfid),			\
+		.oemid = (_oemid),			\
+		.rev_start = (_rev_start),		\
+		.rev_end = (_rev_end),			\
+		.cis_vendor = (_cis_vendor),		\
+		.cis_device = (_cis_device),		\
+		.vendor_fixup = (_fixup),		\
+		.data = (_data),			\
+		.ext_csd_rev = (_ext_csd_rev),		\
+	}
+
+#define MMC_FIXUP_REV(_name, _manfid, _oemid, _rev_start, _rev_end,	\
+		      _fixup, _data, _ext_csd_rev)			\
+	_FIXUP_EXT(_name, _manfid,					\
+		   _oemid, _rev_start, _rev_end,			\
+		   SDIO_ANY_ID, SDIO_ANY_ID,				\
+		   _fixup, _data, _ext_csd_rev)				\
+
+#define MMC_FIXUP(_name, _manfid, _oemid, _fixup, _data) \
+	MMC_FIXUP_REV(_name, _manfid, _oemid, 0, -1ull, _fixup, _data,	\
+		      EXT_CSD_REV_ANY)
+
+#define MMC_FIXUP_EXT_CSD_REV(_name, _manfid, _oemid, _fixup, _data,	\
+			      _ext_csd_rev)				\
+	MMC_FIXUP_REV(_name, _manfid, _oemid, 0, -1ull, _fixup, _data,	\
+		      _ext_csd_rev)
+
+#define SDIO_FIXUP(_vendor, _device, _fixup, _data)			\
+	_FIXUP_EXT(CID_NAME_ANY, CID_MANFID_ANY,			\
+		    CID_OEMID_ANY, 0, -1ull,				\
+		   _vendor, _device,					\
+		   _fixup, _data, EXT_CSD_REV_ANY)			\
+
+#define cid_rev(hwrev, fwrev, year, month)	\
+	(((u64) hwrev) << 40 |			\
+	 ((u64) fwrev) << 32 |			\
+	 ((u64) year) << 16 |			\
+	 ((u64) month))
+
+#define cid_rev_card(card)			\
+	cid_rev(card->cid.hwrev,		\
+		    card->cid.fwrev,		\
+		    card->cid.year,		\
+		    card->cid.month)
+
+/*
+ * Unconditionally quirk add/remove.
+ */
+static inline void __maybe_unused add_quirk(struct mmc_card *card, int data)
+{
+	card->quirks |= data;
+}
+
+static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
+{
+	card->quirks &= ~data;
+}
+
+static inline void __maybe_unused add_limit_rate_quirk(struct mmc_card *card,
+						       int data)
+{
+	card->quirk_max_rate = data;
+}
+
+/*
+ * Quirk add/remove for MMC products.
+ */
+static inline void __maybe_unused add_quirk_mmc(struct mmc_card *card, int data)
+{
+	if (mmc_card_mmc(card))
+		card->quirks |= data;
+}
+
+static inline void __maybe_unused remove_quirk_mmc(struct mmc_card *card,
+						   int data)
+{
+	if (mmc_card_mmc(card))
+		card->quirks &= ~data;
+}
+
+/*
+ * Quirk add/remove for SD products.
+ */
+static inline void __maybe_unused add_quirk_sd(struct mmc_card *card, int data)
+{
+	if (mmc_card_sd(card))
+		card->quirks |= data;
+}
+
+static inline void __maybe_unused remove_quirk_sd(struct mmc_card *card,
+						   int data)
+{
+	if (mmc_card_sd(card))
+		card->quirks &= ~data;
+}
+
+static inline int mmc_card_lenient_fn0(const struct mmc_card *c)
+{
+	return c->quirks & MMC_QUIRK_LENIENT_FN0;
+}
+
+static inline int mmc_blksz_for_byte_mode(const struct mmc_card *c)
+{
+	return c->quirks & MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
+}
+
+static inline int mmc_card_disable_cd(const struct mmc_card *c)
+{
+	return c->quirks & MMC_QUIRK_DISABLE_CD;
+}
+
+static inline int mmc_card_nonstd_func_interface(const struct mmc_card *c)
+{
+	return c->quirks & MMC_QUIRK_NONSTD_FUNC_IF;
+}
+
+static inline int mmc_card_broken_byte_mode_512(const struct mmc_card *c)
+{
+	return c->quirks & MMC_QUIRK_BROKEN_BYTE_MODE_512;
+}
+
+static inline int mmc_card_long_read_time(const struct mmc_card *c)
+{
+	return c->quirks & MMC_QUIRK_LONG_READ_TIME;
+}
+
+static inline int mmc_card_broken_irq_polling(const struct mmc_card *c)
+{
+	return c->quirks & MMC_QUIRK_BROKEN_IRQ_POLLING;
+}
+
+static inline int mmc_card_broken_hpi(const struct mmc_card *c)
+{
+	return c->quirks & MMC_QUIRK_BROKEN_HPI;
+}
+
+#endif
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
new file mode 100644
index 000000000..e340791a8
--- /dev/null
+++ b/drivers/mmc/core/core.c
@@ -0,0 +1,2835 @@
+/*
+ *  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/pm_wakeup.h>
+#include <linux/suspend.h>
+#include <linux/fault-inject.h>
+#include <linux/random.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sd.h>
+#include <linux/mmc/slot-gpio.h>
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/mmc.h>
+
+#include "core.h"
+#include "card.h"
+#include "bus.h"
+#include "host.h"
+#include "sdio_bus.h"
+#include "pwrseq.h"
+
+#include "mmc_ops.h"
+#include "sd_ops.h"
+#include "sdio_ops.h"
+
+/* The max erase timeout, used when host->max_busy_timeout isn't specified */
+#define MMC_ERASE_TIMEOUT_MS	(60 * 1000) /* 60 s */
+
+static const unsigned freqs[] = { 400000, 300000, 200000, 100000 };
+
+/*
+ * 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);
+
+static int mmc_schedule_delayed_work(struct delayed_work *work,
+				     unsigned long delay)
+{
+	/*
+	 * We use the system_freezable_wq, because of two reasons.
+	 * First, it allows several works (not the same work item) to be
+	 * executed simultaneously. Second, the queue becomes frozen when
+	 * userspace becomes frozen during system PM.
+	 */
+	return queue_delayed_work(system_freezable_wq, work, delay);
+}
+
+#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 && cmd->error) || data->error ||
+	    !should_fail(&host->fail_mmc_request, data->blksz * data->blocks))
+		return;
+
+	data->error = data_errors[prandom_u32() % ARRAY_SIZE(data_errors)];
+	data->bytes_xfered = (prandom_u32() % (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 */
+
+static inline void mmc_complete_cmd(struct mmc_request *mrq)
+{
+	if (mrq->cap_cmd_during_tfr && !completion_done(&mrq->cmd_completion))
+		complete_all(&mrq->cmd_completion);
+}
+
+void mmc_command_done(struct mmc_host *host, struct mmc_request *mrq)
+{
+	if (!mrq->cap_cmd_during_tfr)
+		return;
+
+	mmc_complete_cmd(mrq);
+
+	pr_debug("%s: cmd done, tfr ongoing (CMD%u)\n",
+		 mmc_hostname(host), mrq->cmd->opcode);
+}
+EXPORT_SYMBOL(mmc_command_done);
+
+/**
+ *	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;
+
+	/* Flag re-tuning needed on CRC errors */
+	if (cmd->opcode != MMC_SEND_TUNING_BLOCK &&
+	    cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200 &&
+	    !host->retune_crc_disable &&
+	    (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) ||
+	    (mrq->data && mrq->data->error == -EILSEQ) ||
+	    (mrq->stop && mrq->stop->error == -EILSEQ)))
+		mmc_retune_needed(host);
+
+	if (err && cmd->retries && mmc_host_is_spi(host)) {
+		if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
+			cmd->retries = 0;
+	}
+
+	if (host->ongoing_mrq == mrq)
+		host->ongoing_mrq = NULL;
+
+	mmc_complete_cmd(mrq);
+
+	trace_mmc_request_done(host, mrq);
+
+	/*
+	 * We list various conditions for the command to be considered
+	 * properly done:
+	 *
+	 * - There was no error, OK fine then
+	 * - We are not doing some kind of retry
+	 * - The card was removed (...so just complete everything no matter
+	 *   if there are errors or retries)
+	 */
+	if (!err || !cmd->retries || mmc_card_removed(host->card)) {
+		mmc_should_fail_request(host, mrq);
+
+		if (!host->ongoing_mrq)
+			led_trigger_event(host->led, LED_OFF);
+
+		if (mrq->sbc) {
+			pr_debug("%s: req done <CMD%u>: %d: %08x %08x %08x %08x\n",
+				mmc_hostname(host), mrq->sbc->opcode,
+				mrq->sbc->error,
+				mrq->sbc->resp[0], mrq->sbc->resp[1],
+				mrq->sbc->resp[2], mrq->sbc->resp[3]);
+		}
+
+		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]);
+		}
+	}
+	/*
+	 * Request starter must handle retries - see
+	 * mmc_wait_for_req_done().
+	 */
+	if (mrq->done)
+		mrq->done(mrq);
+}
+
+EXPORT_SYMBOL(mmc_request_done);
+
+static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
+{
+	int err;
+
+	/* Assumes host controller has been runtime resumed by mmc_claim_host */
+	err = mmc_retune(host);
+	if (err) {
+		mrq->cmd->error = err;
+		mmc_request_done(host, mrq);
+		return;
+	}
+
+	/*
+	 * For sdio rw commands we must wait for card busy otherwise some
+	 * sdio devices won't work properly.
+	 * And bypass I/O abort, reset and bus suspend operations.
+	 */
+	if (sdio_is_io_busy(mrq->cmd->opcode, mrq->cmd->arg) &&
+	    host->ops->card_busy) {
+		int tries = 500; /* Wait aprox 500ms at maximum */
+
+		while (host->ops->card_busy(host) && --tries)
+			mmc_delay(1);
+
+		if (tries == 0) {
+			mrq->cmd->error = -EBUSY;
+			mmc_request_done(host, mrq);
+			return;
+		}
+	}
+
+	if (mrq->cap_cmd_during_tfr) {
+		host->ongoing_mrq = mrq;
+		/*
+		 * Retry path could come through here without having waiting on
+		 * cmd_completion, so ensure it is reinitialised.
+		 */
+		reinit_completion(&mrq->cmd_completion);
+	}
+
+	trace_mmc_request_start(host, mrq);
+
+	if (host->cqe_on)
+		host->cqe_ops->cqe_off(host);
+
+	host->ops->request(host, mrq);
+}
+
+static void mmc_mrq_pr_debug(struct mmc_host *host, struct mmc_request *mrq,
+			     bool cqe)
+{
+	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);
+	}
+
+	if (mrq->cmd) {
+		pr_debug("%s: starting %sCMD%u arg %08x flags %08x\n",
+			 mmc_hostname(host), cqe ? "CQE direct " : "",
+			 mrq->cmd->opcode, mrq->cmd->arg, mrq->cmd->flags);
+	} else if (cqe) {
+		pr_debug("%s: starting CQE transfer for tag %d blkaddr %u\n",
+			 mmc_hostname(host), mrq->tag, mrq->data->blk_addr);
+	}
+
+	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);
+	}
+}
+
+static int mmc_mrq_prep(struct mmc_host *host, struct mmc_request *mrq)
+{
+	unsigned int i, sz = 0;
+	struct scatterlist *sg;
+
+	if (mrq->cmd) {
+		mrq->cmd->error = 0;
+		mrq->cmd->mrq = mrq;
+		mrq->cmd->data = mrq->data;
+	}
+	if (mrq->sbc) {
+		mrq->sbc->error = 0;
+		mrq->sbc->mrq = mrq;
+	}
+	if (mrq->data) {
+		if (mrq->data->blksz > host->max_blk_size ||
+		    mrq->data->blocks > host->max_blk_count ||
+		    mrq->data->blocks * mrq->data->blksz > host->max_req_size)
+			return -EINVAL;
+
+		for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i)
+			sz += sg->length;
+		if (sz != mrq->data->blocks * mrq->data->blksz)
+			return -EINVAL;
+
+		mrq->data->error = 0;
+		mrq->data->mrq = mrq;
+		if (mrq->stop) {
+			mrq->data->stop = mrq->stop;
+			mrq->stop->error = 0;
+			mrq->stop->mrq = mrq;
+		}
+	}
+
+	return 0;
+}
+
+int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
+{
+	int err;
+
+	init_completion(&mrq->cmd_completion);
+
+	mmc_retune_hold(host);
+
+	if (mmc_card_removed(host->card))
+		return -ENOMEDIUM;
+
+	mmc_mrq_pr_debug(host, mrq, false);
+
+	WARN_ON(!host->claimed);
+
+	err = mmc_mrq_prep(host, mrq);
+	if (err)
+		return err;
+
+	led_trigger_event(host->led, LED_FULL);
+	__mmc_start_request(host, mrq);
+
+	return 0;
+}
+EXPORT_SYMBOL(mmc_start_request);
+
+static void mmc_wait_done(struct mmc_request *mrq)
+{
+	complete(&mrq->completion);
+}
+
+static inline void mmc_wait_ongoing_tfr_cmd(struct mmc_host *host)
+{
+	struct mmc_request *ongoing_mrq = READ_ONCE(host->ongoing_mrq);
+
+	/*
+	 * If there is an ongoing transfer, wait for the command line to become
+	 * available.
+	 */
+	if (ongoing_mrq && !completion_done(&ongoing_mrq->cmd_completion))
+		wait_for_completion(&ongoing_mrq->cmd_completion);
+}
+
+static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq)
+{
+	int err;
+
+	mmc_wait_ongoing_tfr_cmd(host);
+
+	init_completion(&mrq->completion);
+	mrq->done = mmc_wait_done;
+
+	err = mmc_start_request(host, mrq);
+	if (err) {
+		mrq->cmd->error = err;
+		mmc_complete_cmd(mrq);
+		complete(&mrq->completion);
+	}
+
+	return err;
+}
+
+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 host has timed out waiting for the sanitize
+		 * to complete, card might be still in programming state
+		 * so let's try to bring the card out of programming
+		 * state.
+		 */
+		if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) {
+			if (!mmc_interrupt_hpi(host->card)) {
+				pr_warn("%s: %s: Interrupted sanitize\n",
+					mmc_hostname(host), __func__);
+				cmd->error = 0;
+				break;
+			} else {
+				pr_err("%s: %s: Failed to interrupt sanitize\n",
+				       mmc_hostname(host), __func__);
+			}
+		}
+		if (!cmd->error || !cmd->retries ||
+		    mmc_card_removed(host->card))
+			break;
+
+		mmc_retune_recheck(host);
+
+		pr_debug("%s: req failed (CMD%u): %d, retrying...\n",
+			 mmc_hostname(host), cmd->opcode, cmd->error);
+		cmd->retries--;
+		cmd->error = 0;
+		__mmc_start_request(host, mrq);
+	}
+
+	mmc_retune_release(host);
+}
+EXPORT_SYMBOL(mmc_wait_for_req_done);
+
+/*
+ * mmc_cqe_start_req - Start a CQE request.
+ * @host: MMC host to start the request
+ * @mrq: request to start
+ *
+ * Start the request, re-tuning if needed and it is possible. Returns an error
+ * code if the request fails to start or -EBUSY if CQE is busy.
+ */
+int mmc_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq)
+{
+	int err;
+
+	/*
+	 * CQE cannot process re-tuning commands. Caller must hold retuning
+	 * while CQE is in use.  Re-tuning can happen here only when CQE has no
+	 * active requests i.e. this is the first.  Note, re-tuning will call
+	 * ->cqe_off().
+	 */
+	err = mmc_retune(host);
+	if (err)
+		goto out_err;
+
+	mrq->host = host;
+
+	mmc_mrq_pr_debug(host, mrq, true);
+
+	err = mmc_mrq_prep(host, mrq);
+	if (err)
+		goto out_err;
+
+	err = host->cqe_ops->cqe_request(host, mrq);
+	if (err)
+		goto out_err;
+
+	trace_mmc_request_start(host, mrq);
+
+	return 0;
+
+out_err:
+	if (mrq->cmd) {
+		pr_debug("%s: failed to start CQE direct CMD%u, error %d\n",
+			 mmc_hostname(host), mrq->cmd->opcode, err);
+	} else {
+		pr_debug("%s: failed to start CQE transfer for tag %d, error %d\n",
+			 mmc_hostname(host), mrq->tag, err);
+	}
+	return err;
+}
+EXPORT_SYMBOL(mmc_cqe_start_req);
+
+/**
+ *	mmc_cqe_request_done - CQE has finished processing an MMC request
+ *	@host: MMC host which completed request
+ *	@mrq: MMC request which completed
+ *
+ *	CQE drivers should call this function when they have completed
+ *	their processing of a request.
+ */
+void mmc_cqe_request_done(struct mmc_host *host, struct mmc_request *mrq)
+{
+	mmc_should_fail_request(host, mrq);
+
+	/* Flag re-tuning needed on CRC errors */
+	if ((mrq->cmd && mrq->cmd->error == -EILSEQ) ||
+	    (mrq->data && mrq->data->error == -EILSEQ))
+		mmc_retune_needed(host);
+
+	trace_mmc_request_done(host, mrq);
+
+	if (mrq->cmd) {
+		pr_debug("%s: CQE req done (direct CMD%u): %d\n",
+			 mmc_hostname(host), mrq->cmd->opcode, mrq->cmd->error);
+	} else {
+		pr_debug("%s: CQE transfer done tag %d\n",
+			 mmc_hostname(host), mrq->tag);
+	}
+
+	if (mrq->data) {
+		pr_debug("%s:     %d bytes transferred: %d\n",
+			 mmc_hostname(host),
+			 mrq->data->bytes_xfered, mrq->data->error);
+	}
+
+	mrq->done(mrq);
+}
+EXPORT_SYMBOL(mmc_cqe_request_done);
+
+/**
+ *	mmc_cqe_post_req - CQE post process of a completed MMC request
+ *	@host: MMC host
+ *	@mrq: MMC request to be processed
+ */
+void mmc_cqe_post_req(struct mmc_host *host, struct mmc_request *mrq)
+{
+	if (host->cqe_ops->cqe_post_req)
+		host->cqe_ops->cqe_post_req(host, mrq);
+}
+EXPORT_SYMBOL(mmc_cqe_post_req);
+
+/* Arbitrary 1 second timeout */
+#define MMC_CQE_RECOVERY_TIMEOUT	1000
+
+/*
+ * mmc_cqe_recovery - Recover from CQE errors.
+ * @host: MMC host to recover
+ *
+ * Recovery consists of stopping CQE, stopping eMMC, discarding the queue in
+ * in eMMC, and discarding the queue in CQE. CQE must call
+ * mmc_cqe_request_done() on all requests. An error is returned if the eMMC
+ * fails to discard its queue.
+ */
+int mmc_cqe_recovery(struct mmc_host *host)
+{
+	struct mmc_command cmd;
+	int err;
+
+	mmc_retune_hold_now(host);
+
+	/*
+	 * Recovery is expected seldom, if at all, but it reduces performance,
+	 * so make sure it is not completely silent.
+	 */
+	pr_warn("%s: running CQE recovery\n", mmc_hostname(host));
+
+	host->cqe_ops->cqe_recovery_start(host);
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.opcode       = MMC_STOP_TRANSMISSION,
+	cmd.flags        = MMC_RSP_R1B | MMC_CMD_AC,
+	cmd.flags       &= ~MMC_RSP_CRC; /* Ignore CRC */
+	cmd.busy_timeout = MMC_CQE_RECOVERY_TIMEOUT,
+	mmc_wait_for_cmd(host, &cmd, 0);
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.opcode       = MMC_CMDQ_TASK_MGMT;
+	cmd.arg          = 1; /* Discard entire queue */
+	cmd.flags        = MMC_RSP_R1B | MMC_CMD_AC;
+	cmd.flags       &= ~MMC_RSP_CRC; /* Ignore CRC */
+	cmd.busy_timeout = MMC_CQE_RECOVERY_TIMEOUT,
+	err = mmc_wait_for_cmd(host, &cmd, 0);
+
+	host->cqe_ops->cqe_recovery_finish(host);
+
+	mmc_retune_release(host);
+
+	return err;
+}
+EXPORT_SYMBOL(mmc_cqe_recovery);
+
+/**
+ *	mmc_is_req_done - Determine if a 'cap_cmd_during_tfr' request is done
+ *	@host: MMC host
+ *	@mrq: MMC request
+ *
+ *	mmc_is_req_done() is used with requests that have
+ *	mrq->cap_cmd_during_tfr = true. mmc_is_req_done() must be called after
+ *	starting a request and before waiting for it to complete. That is,
+ *	either in between calls to mmc_start_req(), or after mmc_wait_for_req()
+ *	and before mmc_wait_for_req_done(). If it is called at other times the
+ *	result is not meaningful.
+ */
+bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq)
+{
+	return completion_done(&mrq->completion);
+}
+EXPORT_SYMBOL(mmc_is_req_done);
+
+/**
+ *	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. In the case of 'cap_cmd_during_tfr'
+ *	requests, the transfer is ongoing and the caller can issue further
+ *	commands that do not use the data lines, and then wait by calling
+ *	mmc_wait_for_req_done().
+ *	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);
+
+	if (!mrq->cap_cmd_during_tfr)
+		mmc_wait_for_req_done(host, mrq);
+}
+EXPORT_SYMBOL(mmc_wait_for_req);
+
+/**
+ *	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 = {};
+
+	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.taac_ns * mult;
+	data->timeout_clks = card->csd.taac_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 (card->host->ios.clock)
+			timeout_us += data->timeout_clks * 1000 /
+				(card->host->ios.clock / 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) {
+			data->timeout_ns = limit_us * 1000;
+			data->timeout_clks = 0;
+		}
+
+		/* assign limit value if invalid */
+		if (timeout_us == 0)
+			data->timeout_ns = limit_us * 1000;
+	}
+
+	/*
+	 * 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, 600ms 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 = 600000000;
+		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);
+
+/*
+ * Allow claiming an already claimed host if the context is the same or there is
+ * no context but the task is the same.
+ */
+static inline bool mmc_ctx_matches(struct mmc_host *host, struct mmc_ctx *ctx,
+				   struct task_struct *task)
+{
+	return host->claimer == ctx ||
+	       (!ctx && task && host->claimer->task == task);
+}
+
+static inline void mmc_ctx_set_claimer(struct mmc_host *host,
+				       struct mmc_ctx *ctx,
+				       struct task_struct *task)
+{
+	if (!host->claimer) {
+		if (ctx)
+			host->claimer = ctx;
+		else
+			host->claimer = &host->default_ctx;
+	}
+	if (task)
+		host->claimer->task = task;
+}
+
+/**
+ *	__mmc_claim_host - exclusively claim a host
+ *	@host: mmc host to claim
+ *	@ctx: context that claims the host or NULL in which case the default
+ *	context will be used
+ *	@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, struct mmc_ctx *ctx,
+		     atomic_t *abort)
+{
+	struct task_struct *task = ctx ? NULL : current;
+	DECLARE_WAITQUEUE(wait, current);
+	unsigned long flags;
+	int stop;
+	bool pm = false;
+
+	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 || mmc_ctx_matches(host, ctx, task))
+			break;
+		spin_unlock_irqrestore(&host->lock, flags);
+		schedule();
+		spin_lock_irqsave(&host->lock, flags);
+	}
+	set_current_state(TASK_RUNNING);
+	if (!stop) {
+		host->claimed = 1;
+		mmc_ctx_set_claimer(host, ctx, task);
+		host->claim_cnt += 1;
+		if (host->claim_cnt == 1)
+			pm = true;
+	} else
+		wake_up(&host->wq);
+	spin_unlock_irqrestore(&host->lock, flags);
+	remove_wait_queue(&host->wq, &wait);
+
+	if (pm)
+		pm_runtime_get_sync(mmc_dev(host));
+
+	return stop;
+}
+EXPORT_SYMBOL(__mmc_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);
+
+	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->task = NULL;
+		host->claimer = NULL;
+		spin_unlock_irqrestore(&host->lock, flags);
+		wake_up(&host->wq);
+		pm_runtime_mark_last_busy(mmc_dev(host));
+		pm_runtime_put_autosuspend(mmc_dev(host));
+	}
+}
+EXPORT_SYMBOL(mmc_release_host);
+
+/*
+ * This is a helper function, which fetches a runtime pm reference for the
+ * card device and also claims the host.
+ */
+void mmc_get_card(struct mmc_card *card, struct mmc_ctx *ctx)
+{
+	pm_runtime_get_sync(&card->dev);
+	__mmc_claim_host(card->host, ctx, NULL);
+}
+EXPORT_SYMBOL(mmc_get_card);
+
+/*
+ * This is a helper function, which releases the host and drops the runtime
+ * pm reference for the card device.
+ */
+void mmc_put_card(struct mmc_card *card, struct mmc_ctx *ctx)
+{
+	struct mmc_host *host = card->host;
+
+	WARN_ON(ctx && host->claimer != ctx);
+
+	mmc_release_host(host);
+	pm_runtime_mark_last_busy(&card->dev);
+	pm_runtime_put_autosuspend(&card->dev);
+}
+EXPORT_SYMBOL(mmc_put_card);
+
+/*
+ * 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,
+		 1 << ios->bus_width, ios->timing);
+
+	host->ops->set_ios(host, ios);
+}
+
+/*
+ * Control chip select pin on a host.
+ */
+void mmc_set_chip_select(struct mmc_host *host, int mode)
+{
+	host->ios.chip_select = mode;
+	mmc_set_ios(host);
+}
+
+/*
+ * Sets the host clock to the highest possible frequency that
+ * is below "hz".
+ */
+void mmc_set_clock(struct mmc_host *host, unsigned int hz)
+{
+	WARN_ON(hz && hz < host->f_min);
+
+	if (hz > host->f_max)
+		hz = host->f_max;
+
+	host->ios.clock = hz;
+	mmc_set_ios(host);
+}
+
+int mmc_execute_tuning(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+	u32 opcode;
+	int err;
+
+	if (!host->ops->execute_tuning)
+		return 0;
+
+	if (host->cqe_on)
+		host->cqe_ops->cqe_off(host);
+
+	if (mmc_card_mmc(card))
+		opcode = MMC_SEND_TUNING_BLOCK_HS200;
+	else
+		opcode = MMC_SEND_TUNING_BLOCK;
+
+	err = host->ops->execute_tuning(host, opcode);
+
+	if (err) {
+		pr_err("%s: tuning execution failed: %d\n",
+			mmc_hostname(host), err);
+	} else {
+		host->retune_now = 0;
+		host->need_retune = 0;
+		mmc_retune_enable(host);
+	}
+
+	return err;
+}
+
+/*
+ * Change the bus mode (open drain/push-pull) of a host.
+ */
+void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode)
+{
+	host->ios.bus_mode = mode;
+	mmc_set_ios(host);
+}
+
+/*
+ * Change data bus width of a host.
+ */
+void mmc_set_bus_width(struct mmc_host *host, unsigned int width)
+{
+	host->ios.bus_width = width;
+	mmc_set_ios(host);
+}
+
+/*
+ * Set initial state after a power cycle or a hw_reset.
+ */
+void mmc_set_initial_state(struct mmc_host *host)
+{
+	if (host->cqe_on)
+		host->cqe_ops->cqe_off(host);
+
+	mmc_retune_disable(host);
+
+	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.bus_width = MMC_BUS_WIDTH_1;
+	host->ios.timing = MMC_TIMING_LEGACY;
+	host->ios.drv_type = 0;
+	host->ios.enhanced_strobe = false;
+
+	/*
+	 * Make sure we are in non-enhanced strobe mode before we
+	 * actually enable it in ext_csd.
+	 */
+	if ((host->caps2 & MMC_CAP2_HS400_ES) &&
+	     host->ops->hs400_enhanced_strobe)
+		host->ops->hs400_enhanced_strobe(host, &host->ios);
+
+	mmc_set_ios(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_OF
+
+/**
+ * mmc_of_parse_voltage - return mask of supported voltages
+ * @np: The device node need to be parsed.
+ * @mask: mask of voltages available for MMC/SD/SDIO
+ *
+ * Parse the "voltage-ranges" DT property, returning zero if it is not
+ * found, negative errno if the voltage-range specification is invalid,
+ * or one if the voltage-range is specified and successfully parsed.
+ */
+int mmc_of_parse_voltage(struct device_node *np, u32 *mask)
+{
+	const u32 *voltage_ranges;
+	int num_ranges, i;
+
+	voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges);
+	num_ranges = num_ranges / sizeof(*voltage_ranges) / 2;
+	if (!voltage_ranges) {
+		pr_debug("%pOF: voltage-ranges unspecified\n", np);
+		return 0;
+	}
+	if (!num_ranges) {
+		pr_err("%pOF: voltage-ranges empty\n", np);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < num_ranges; i++) {
+		const int j = i * 2;
+		u32 ocr_mask;
+
+		ocr_mask = mmc_vddrange_to_ocrmask(
+				be32_to_cpu(voltage_ranges[j]),
+				be32_to_cpu(voltage_ranges[j + 1]));
+		if (!ocr_mask) {
+			pr_err("%pOF: voltage-range #%d is invalid\n",
+				np, i);
+			return -EINVAL;
+		}
+		*mask |= ocr_mask;
+	}
+
+	return 1;
+}
+EXPORT_SYMBOL(mmc_of_parse_voltage);
+
+#endif /* CONFIG_OF */
+
+static int mmc_of_get_func_num(struct device_node *node)
+{
+	u32 reg;
+	int ret;
+
+	ret = of_property_read_u32(node, "reg", &reg);
+	if (ret < 0)
+		return ret;
+
+	return reg;
+}
+
+struct device_node *mmc_of_find_child_device(struct mmc_host *host,
+		unsigned func_num)
+{
+	struct device_node *node;
+
+	if (!host->parent || !host->parent->of_node)
+		return NULL;
+
+	for_each_child_of_node(host->parent->of_node, node) {
+		if (mmc_of_get_func_num(node) == func_num)
+			return node;
+	}
+
+	return NULL;
+}
+
+#ifdef CONFIG_REGULATOR
+
+/**
+ * mmc_ocrbitnum_to_vdd - Convert a OCR bit number to its voltage
+ * @vdd_bit:	OCR bit number
+ * @min_uV:	minimum voltage value (mV)
+ * @max_uV:	maximum voltage value (mV)
+ *
+ * This function returns the voltage range according to the provided OCR
+ * bit number. If conversion is not possible a negative errno value returned.
+ */
+static int mmc_ocrbitnum_to_vdd(int vdd_bit, int *min_uV, int *max_uV)
+{
+	int		tmp;
+
+	if (!vdd_bit)
+		return -EINVAL;
+
+	/*
+	 * 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;
+	}
+
+	return 0;
+}
+
+/**
+ * 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;
+	int			vdd_uV;
+	int			vdd_mV;
+
+	count = regulator_count_voltages(supply);
+	if (count < 0)
+		return count;
+
+	for (i = 0; i < count; i++) {
+		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);
+	}
+
+	if (!result) {
+		vdd_uV = regulator_get_voltage(supply);
+		if (vdd_uV <= 0)
+			return vdd_uV;
+
+		vdd_mV = vdd_uV / 1000;
+		result = mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV);
+	}
+
+	return result;
+}
+EXPORT_SYMBOL_GPL(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) {
+		mmc_ocrbitnum_to_vdd(vdd_bit, &min_uV, &max_uV);
+
+		result = regulator_set_voltage(supply, min_uV, max_uV);
+		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_GPL(mmc_regulator_set_ocr);
+
+static int mmc_regulator_set_voltage_if_supported(struct regulator *regulator,
+						  int min_uV, int target_uV,
+						  int max_uV)
+{
+	/*
+	 * Check if supported first to avoid errors since we may try several
+	 * signal levels during power up and don't want to show errors.
+	 */
+	if (!regulator_is_supported_voltage(regulator, min_uV, max_uV))
+		return -EINVAL;
+
+	return regulator_set_voltage_triplet(regulator, min_uV, target_uV,
+					     max_uV);
+}
+
+/**
+ * mmc_regulator_set_vqmmc - Set VQMMC as per the ios
+ *
+ * For 3.3V signaling, we try to match VQMMC to VMMC as closely as possible.
+ * That will match the behavior of old boards where VQMMC and VMMC were supplied
+ * by the same supply.  The Bus Operating conditions for 3.3V signaling in the
+ * SD card spec also define VQMMC in terms of VMMC.
+ * If this is not possible we'll try the full 2.7-3.6V of the spec.
+ *
+ * For 1.2V and 1.8V signaling we'll try to get as close as possible to the
+ * requested voltage.  This is definitely a good idea for UHS where there's a
+ * separate regulator on the card that's trying to make 1.8V and it's best if
+ * we match.
+ *
+ * This function is expected to be used by a controller's
+ * start_signal_voltage_switch() function.
+ */
+int mmc_regulator_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+	struct device *dev = mmc_dev(mmc);
+	int ret, volt, min_uV, max_uV;
+
+	/* If no vqmmc supply then we can't change the voltage */
+	if (IS_ERR(mmc->supply.vqmmc))
+		return -EINVAL;
+
+	switch (ios->signal_voltage) {
+	case MMC_SIGNAL_VOLTAGE_120:
+		return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
+						1100000, 1200000, 1300000);
+	case MMC_SIGNAL_VOLTAGE_180:
+		return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
+						1700000, 1800000, 1950000);
+	case MMC_SIGNAL_VOLTAGE_330:
+		ret = mmc_ocrbitnum_to_vdd(mmc->ios.vdd, &volt, &max_uV);
+		if (ret < 0)
+			return ret;
+
+		dev_dbg(dev, "%s: found vmmc voltage range of %d-%duV\n",
+			__func__, volt, max_uV);
+
+		min_uV = max(volt - 300000, 2700000);
+		max_uV = min(max_uV + 200000, 3600000);
+
+		/*
+		 * Due to a limitation in the current implementation of
+		 * regulator_set_voltage_triplet() which is taking the lowest
+		 * voltage possible if below the target, search for a suitable
+		 * voltage in two steps and try to stay close to vmmc
+		 * with a 0.3V tolerance at first.
+		 */
+		if (!mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
+						min_uV, volt, max_uV))
+			return 0;
+
+		return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
+						2700000, volt, 3600000);
+	default:
+		return -EINVAL;
+	}
+}
+EXPORT_SYMBOL_GPL(mmc_regulator_set_vqmmc);
+
+#endif /* CONFIG_REGULATOR */
+
+/**
+ * mmc_regulator_get_supply - try to get VMMC and VQMMC regulators for a host
+ * @mmc: the host to regulate
+ *
+ * Returns 0 or errno. errno should be handled, it is either a critical error
+ * or -EPROBE_DEFER. 0 means no critical error but it does not mean all
+ * regulators have been found because they all are optional. If you require
+ * certain regulators, you need to check separately in your driver if they got
+ * populated after calling this function.
+ */
+int mmc_regulator_get_supply(struct mmc_host *mmc)
+{
+	struct device *dev = mmc_dev(mmc);
+	int ret;
+
+	mmc->supply.vmmc = devm_regulator_get_optional(dev, "vmmc");
+	mmc->supply.vqmmc = devm_regulator_get_optional(dev, "vqmmc");
+
+	if (IS_ERR(mmc->supply.vmmc)) {
+		if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_dbg(dev, "No vmmc regulator found\n");
+	} else {
+		ret = mmc_regulator_get_ocrmask(mmc->supply.vmmc);
+		if (ret > 0)
+			mmc->ocr_avail = ret;
+		else
+			dev_warn(dev, "Failed getting OCR mask: %d\n", ret);
+	}
+
+	if (IS_ERR(mmc->supply.vqmmc)) {
+		if (PTR_ERR(mmc->supply.vqmmc) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		dev_dbg(dev, "No vqmmc regulator found\n");
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mmc_regulator_get_supply);
+
+/*
+ * 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;
+
+	/*
+	 * Sanity check the voltages that the card claims to
+	 * support.
+	 */
+	if (ocr & 0x7F) {
+		dev_warn(mmc_dev(host),
+		"card claims to support voltages below defined range\n");
+		ocr &= ~0x7F;
+	}
+
+	ocr &= host->ocr_avail;
+	if (!ocr) {
+		dev_warn(mmc_dev(host), "no support for card's volts\n");
+		return 0;
+	}
+
+	if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) {
+		bit = ffs(ocr) - 1;
+		ocr &= 3 << bit;
+		mmc_power_cycle(host, ocr);
+	} else {
+		bit = fls(ocr) - 1;
+		ocr &= 3 << bit;
+		if (bit != host->ios.vdd)
+			dev_warn(mmc_dev(host), "exceeding card's volts\n");
+	}
+
+	return ocr;
+}
+
+int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage)
+{
+	int err = 0;
+	int old_signal_voltage = host->ios.signal_voltage;
+
+	host->ios.signal_voltage = signal_voltage;
+	if (host->ops->start_signal_voltage_switch)
+		err = host->ops->start_signal_voltage_switch(host, &host->ios);
+
+	if (err)
+		host->ios.signal_voltage = old_signal_voltage;
+
+	return err;
+
+}
+
+void mmc_set_initial_signal_voltage(struct mmc_host *host)
+{
+	/* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */
+	if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330))
+		dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n");
+	else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180))
+		dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n");
+	else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120))
+		dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n");
+}
+
+int mmc_host_set_uhs_voltage(struct mmc_host *host)
+{
+	u32 clock;
+
+	/*
+	 * During a signal voltage level switch, the clock must be gated
+	 * for 5 ms according to the SD spec
+	 */
+	clock = host->ios.clock;
+	host->ios.clock = 0;
+	mmc_set_ios(host);
+
+	if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180))
+		return -EAGAIN;
+
+	/* Keep clock gated for at least 10 ms, though spec only says 5 ms */
+	mmc_delay(10);
+	host->ios.clock = clock;
+	mmc_set_ios(host);
+
+	return 0;
+}
+
+int mmc_set_uhs_voltage(struct mmc_host *host, u32 ocr)
+{
+	struct mmc_command cmd = {};
+	int err = 0;
+
+	/*
+	 * If we cannot switch voltages, return failure so the caller
+	 * can continue without UHS mode
+	 */
+	if (!host->ops->start_signal_voltage_switch)
+		return -EPERM;
+	if (!host->ops->card_busy)
+		pr_warn("%s: cannot verify signal voltage switch\n",
+			mmc_hostname(host));
+
+	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)
+		goto power_cycle;
+
+	if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR))
+		return -EIO;
+
+	/*
+	 * The card should drive cmd and dat[0:3] low immediately
+	 * after the response of cmd11, but wait 1 ms to be sure
+	 */
+	mmc_delay(1);
+	if (host->ops->card_busy && !host->ops->card_busy(host)) {
+		err = -EAGAIN;
+		goto power_cycle;
+	}
+
+	if (mmc_host_set_uhs_voltage(host)) {
+		/*
+		 * Voltages may not have been switched, but we've already
+		 * sent CMD11, so a power cycle is required anyway
+		 */
+		err = -EAGAIN;
+		goto power_cycle;
+	}
+
+	/* Wait for at least 1 ms according to spec */
+	mmc_delay(1);
+
+	/*
+	 * Failure to switch is indicated by the card holding
+	 * dat[0:3] low
+	 */
+	if (host->ops->card_busy && host->ops->card_busy(host))
+		err = -EAGAIN;
+
+power_cycle:
+	if (err) {
+		pr_debug("%s: Signal voltage switch failed, "
+			"power cycling card\n", mmc_hostname(host));
+		mmc_power_cycle(host, ocr);
+	}
+
+	return err;
+}
+
+/*
+ * Select timing parameters for host.
+ */
+void mmc_set_timing(struct mmc_host *host, unsigned int timing)
+{
+	host->ios.timing = timing;
+	mmc_set_ios(host);
+}
+
+/*
+ * Select appropriate driver type for host.
+ */
+void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type)
+{
+	host->ios.drv_type = drv_type;
+	mmc_set_ios(host);
+}
+
+int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr,
+			      int card_drv_type, int *drv_type)
+{
+	struct mmc_host *host = card->host;
+	int host_drv_type = SD_DRIVER_TYPE_B;
+
+	*drv_type = 0;
+
+	if (!host->ops->select_drive_strength)
+		return 0;
+
+	/* Use SD definition of driver strength for hosts */
+	if (host->caps & MMC_CAP_DRIVER_TYPE_A)
+		host_drv_type |= SD_DRIVER_TYPE_A;
+
+	if (host->caps & MMC_CAP_DRIVER_TYPE_C)
+		host_drv_type |= SD_DRIVER_TYPE_C;
+
+	if (host->caps & MMC_CAP_DRIVER_TYPE_D)
+		host_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
+	 */
+	return host->ops->select_drive_strength(card, max_dtr,
+						host_drv_type,
+						card_drv_type,
+						drv_type);
+}
+
+/*
+ * 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.
+ */
+void mmc_power_up(struct mmc_host *host, u32 ocr)
+{
+	if (host->ios.power_mode == MMC_POWER_ON)
+		return;
+
+	mmc_pwrseq_pre_power_on(host);
+
+	host->ios.vdd = fls(ocr) - 1;
+	host->ios.power_mode = MMC_POWER_UP;
+	/* Set initial state and call mmc_set_ios */
+	mmc_set_initial_state(host);
+
+	mmc_set_initial_signal_voltage(host);
+
+	/*
+	 * This delay should be sufficient to allow the power supply
+	 * to reach the minimum voltage.
+	 */
+	mmc_delay(host->ios.power_delay_ms);
+
+	mmc_pwrseq_post_power_on(host);
+
+	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(host->ios.power_delay_ms);
+}
+
+void mmc_power_off(struct mmc_host *host)
+{
+	if (host->ios.power_mode == MMC_POWER_OFF)
+		return;
+
+	mmc_pwrseq_power_off(host);
+
+	host->ios.clock = 0;
+	host->ios.vdd = 0;
+
+	host->ios.power_mode = MMC_POWER_OFF;
+	/* Set initial state and call mmc_set_ios */
+	mmc_set_initial_state(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);
+}
+
+void mmc_power_cycle(struct mmc_host *host, u32 ocr)
+{
+	mmc_power_off(host);
+	/* Wait at least 1 ms according to SD spec */
+	mmc_delay(1);
+	mmc_power_up(host, ocr);
+}
+
+/*
+ * Cleanup when the last reference to the bus operator is dropped.
+ */
+static void __mmc_release_bus(struct mmc_host *host)
+{
+	WARN_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);
+}
+
+/*
+ * 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;
+
+	WARN_ON(!host->claimed);
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	WARN_ON(host->bus_ops);
+	WARN_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;
+
+	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);
+}
+
+static void _mmc_detect_change(struct mmc_host *host, unsigned long delay,
+				bool cd_irq)
+{
+	/*
+	 * If the device is configured as wakeup, we prevent a new sleep for
+	 * 5 s to give provision for user space to consume the event.
+	 */
+	if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL) &&
+		device_can_wakeup(mmc_dev(host)))
+		pm_wakeup_event(mmc_dev(host), 5000);
+
+	host->detect_change = 1;
+	mmc_schedule_delayed_work(&host->detect, delay);
+}
+
+/**
+ *	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)
+{
+	_mmc_detect_change(host, delay, true);
+}
+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, have a stab at ai good value and 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. Also note, erase_size is already set to
+	 * High Capacity Erase Size if available when this function is called.
+	 */
+	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->erase_size) {
+		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;
+		}
+	} else
+		card->pref_erase = 0;
+}
+
+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.taac_clks * mult;
+		unsigned int timeout_us;
+
+		/* Avoid overflow: e.g. taac_ns=80000000 mult=1280 */
+		if (card->csd.taac_ns < 1000000)
+			timeout_us = (card->csd.taac_ns * mult) / 1000;
+		else
+			timeout_us = (card->csd.taac_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) /
+			      (card->host->ios.clock / 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 = {};
+	unsigned int qty = 0, busy_timeout = 0;
+	bool use_r1b_resp = false;
+	unsigned long timeout;
+	int loop_udelay=64, udelay_max=32768;
+	int err;
+
+	mmc_retune_hold(card->host);
+
+	/*
+	 * 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;
+	busy_timeout = mmc_erase_timeout(card, arg, qty);
+	/*
+	 * If the host controller supports busy signalling and the timeout for
+	 * the erase operation does not exceed the max_busy_timeout, we should
+	 * use R1B response. Or we need to prevent the host from doing hw busy
+	 * detection, which is done by converting to a R1 response instead.
+	 * Note, some hosts requires R1B, which also means they are on their own
+	 * when it comes to deal with the busy timeout.
+	 */
+	if (!(card->host->caps & MMC_CAP_NEED_RSP_BUSY) &&
+	    card->host->max_busy_timeout &&
+	    busy_timeout > card->host->max_busy_timeout) {
+		cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
+	} else {
+		cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
+		cmd.busy_timeout = busy_timeout;
+		use_r1b_resp = true;
+	}
+
+	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;
+
+	/*
+	 * In case of when R1B + MMC_CAP_WAIT_WHILE_BUSY is used, the polling
+	 * shall be avoided.
+	 */
+	if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp)
+		goto out;
+
+	timeout = jiffies + msecs_to_jiffies(busy_timeout);
+	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 || R1_STATUS(cmd.resp[0])) {
+			pr_err("error %d requesting status %#x\n",
+				err, cmd.resp[0]);
+			err = -EIO;
+			goto out;
+		}
+
+		/* Timeout if the device never becomes ready for data and
+		 * never leaves the program state.
+		 */
+		if (time_after(jiffies, timeout)) {
+			pr_err("%s: Card stuck in programming state! %s\n",
+				mmc_hostname(card->host), __func__);
+			err =  -EIO;
+			goto out;
+		}
+		if ((cmd.resp[0] & R1_READY_FOR_DATA) &&
+		    R1_CURRENT_STATE(cmd.resp[0]) != R1_STATE_PRG)
+			break;
+
+		usleep_range(loop_udelay, loop_udelay*2);
+		if (loop_udelay < udelay_max)
+			loop_udelay *= 2;
+	} while (1);
+
+out:
+	mmc_retune_release(card->host);
+	return err;
+}
+
+static unsigned int mmc_align_erase_size(struct mmc_card *card,
+					 unsigned int *from,
+					 unsigned int *to,
+					 unsigned int nr)
+{
+	unsigned int from_new = *from, nr_new = nr, rem;
+
+	/*
+	 * When the 'card->erase_size' is power of 2, we can use round_up/down()
+	 * to align the erase size efficiently.
+	 */
+	if (is_power_of_2(card->erase_size)) {
+		unsigned int temp = from_new;
+
+		from_new = round_up(temp, card->erase_size);
+		rem = from_new - temp;
+
+		if (nr_new > rem)
+			nr_new -= rem;
+		else
+			return 0;
+
+		nr_new = round_down(nr_new, card->erase_size);
+	} else {
+		rem = from_new % card->erase_size;
+		if (rem) {
+			rem = card->erase_size - rem;
+			from_new += rem;
+			if (nr_new > rem)
+				nr_new -= rem;
+			else
+				return 0;
+		}
+
+		rem = nr_new % card->erase_size;
+		if (rem)
+			nr_new -= rem;
+	}
+
+	if (nr_new == 0)
+		return 0;
+
+	*to = from_new + nr_new;
+	*from = from_new;
+
+	return nr_new;
+}
+
+/**
+ * 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;
+	int err;
+
+	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)
+		nr = mmc_align_erase_size(card, &from, &to, nr);
+
+	if (nr == 0)
+		return 0;
+
+	if (to <= from)
+		return -EINVAL;
+
+	/* 'from' and 'to' are inclusive */
+	to -= 1;
+
+	/*
+	 * Special case where only one erase-group fits in the timeout budget:
+	 * If the region crosses an erase-group boundary on this particular
+	 * case, we will be trimming more than one erase-group which, does not
+	 * fit in the timeout budget of the controller, so we need to split it
+	 * and call mmc_do_erase() twice if necessary. This special case is
+	 * identified by the card->eg_boundary flag.
+	 */
+	rem = card->erase_size - (from % card->erase_size);
+	if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && (nr > rem)) {
+		err = mmc_do_erase(card, from, from + rem - 1, arg);
+		from += rem;
+		if ((err) || (to <= from))
+			return err;
+	}
+
+	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) &&
+	    (!(card->quirks & MMC_QUIRK_TRIM_BROKEN)))
+		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) &&
+	    !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN))
+		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, min_qty, timeout;
+	unsigned int last_timeout = 0;
+	unsigned int max_busy_timeout = host->max_busy_timeout ?
+			host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS;
+
+	if (card->erase_shift) {
+		max_qty = UINT_MAX >> card->erase_shift;
+		min_qty = card->pref_erase >> card->erase_shift;
+	} else if (mmc_card_sd(card)) {
+		max_qty = UINT_MAX;
+		min_qty = card->pref_erase;
+	} else {
+		max_qty = UINT_MAX / card->erase_size;
+		min_qty = card->pref_erase / card->erase_size;
+	}
+
+	/*
+	 * We should not only use 'host->max_busy_timeout' as the limitation
+	 * when deciding the max discard sectors. We should set a balance value
+	 * to improve the erase speed, and it can not get too long timeout at
+	 * the same time.
+	 *
+	 * Here we set 'card->pref_erase' as the minimal discard sectors no
+	 * matter what size of 'host->max_busy_timeout', but if the
+	 * 'host->max_busy_timeout' is large enough for more discard sectors,
+	 * then we can continue to increase the max discard sectors until we
+	 * get a balance value. In cases when the 'host->max_busy_timeout'
+	 * isn't specified, use the default max erase 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 (qty + x > min_qty && timeout > max_busy_timeout)
+				break;
+
+			if (timeout < last_timeout)
+				break;
+			last_timeout = timeout;
+			y = x;
+		}
+		qty += y;
+	} while (y);
+
+	if (!qty)
+		return 0;
+
+	/*
+	 * When specifying a sector range to trim, chances are we might cross
+	 * an erase-group boundary even if the amount of sectors is less than
+	 * one erase-group.
+	 * If we can only fit one erase-group in the controller timeout budget,
+	 * we have to care that erase-group boundaries are not crossed by a
+	 * single trim operation. We flag that special case with "eg_boundary".
+	 * In all other cases we can just decrement qty and pretend that we
+	 * always touch (qty + 1) erase-groups as a simple optimization.
+	 */
+	if (qty == 1)
+		card->eg_boundary = 1;
+	else
+		qty--;
+
+	/* Convert qty to sectors */
+	if (card->erase_shift)
+		max_discard = qty << card->erase_shift;
+	else if (mmc_card_sd(card))
+		max_discard = qty + 1;
+	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;
+
+	/*
+	 * 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 == 0)
+			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_busy_timeout ?
+		host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS);
+	return max_discard;
+}
+EXPORT_SYMBOL(mmc_calc_max_discard);
+
+bool mmc_card_is_blockaddr(struct mmc_card *card)
+{
+	return card ? mmc_card_blockaddr(card) : false;
+}
+EXPORT_SYMBOL(mmc_card_is_blockaddr);
+
+int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen)
+{
+	struct mmc_command cmd = {};
+
+	if (mmc_card_blockaddr(card) || mmc_card_ddr52(card) ||
+	    mmc_card_hs400(card) || mmc_card_hs400es(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);
+
+int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount,
+			bool is_rel_write)
+{
+	struct mmc_command cmd = {};
+
+	cmd.opcode = MMC_SET_BLOCK_COUNT;
+	cmd.arg = blockcount & 0x0000FFFF;
+	if (is_rel_write)
+		cmd.arg |= 1 << 31;
+	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_blockcount);
+
+static void mmc_hw_reset_for_init(struct mmc_host *host)
+{
+	mmc_pwrseq_reset(host);
+
+	if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
+		return;
+	host->ops->hw_reset(host);
+}
+
+int mmc_hw_reset(struct mmc_host *host)
+{
+	int ret;
+
+	if (!host->card)
+		return -EINVAL;
+
+	mmc_bus_get(host);
+	if (!host->bus_ops || host->bus_dead || !host->bus_ops->hw_reset) {
+		mmc_bus_put(host);
+		return -EOPNOTSUPP;
+	}
+
+	ret = host->bus_ops->hw_reset(host);
+	mmc_bus_put(host);
+
+	if (ret)
+		pr_warn("%s: tried to HW reset card, got error %d\n",
+			mmc_hostname(host), ret);
+
+	return ret;
+}
+EXPORT_SYMBOL(mmc_hw_reset);
+
+int mmc_sw_reset(struct mmc_host *host)
+{
+	int ret;
+
+	if (!host->card)
+		return -EINVAL;
+
+	mmc_bus_get(host);
+	if (!host->bus_ops || host->bus_dead || !host->bus_ops->sw_reset) {
+		mmc_bus_put(host);
+		return -EOPNOTSUPP;
+	}
+
+	ret = host->bus_ops->sw_reset(host);
+	mmc_bus_put(host);
+
+	if (ret)
+		pr_warn("%s: tried to SW reset card, got error %d\n",
+			mmc_hostname(host), ret);
+
+	return ret;
+}
+EXPORT_SYMBOL(mmc_sw_reset);
+
+static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
+{
+	host->f_init = freq;
+
+	pr_debug("%s: %s: trying to init card at %u Hz\n",
+		mmc_hostname(host), __func__, host->f_init);
+
+	mmc_power_up(host, host->ocr_avail);
+
+	/*
+	 * 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);
+
+	/*
+	 * 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.
+	 * Skip it if we already know that we do not support SDIO commands
+	 */
+	if (!(host->caps2 & MMC_CAP2_NO_SDIO))
+		sdio_reset(host);
+
+	mmc_go_idle(host);
+
+	if (!(host->caps2 & MMC_CAP2_NO_SD))
+		mmc_send_if_cond(host, host->ocr_avail);
+
+	/* Order's important: probe SDIO, then SD, then MMC */
+	if (!(host->caps2 & MMC_CAP2_NO_SDIO))
+		if (!mmc_attach_sdio(host))
+			return 0;
+
+	if (!(host->caps2 & MMC_CAP2_NO_SD))
+		if (!mmc_attach_sd(host))
+			return 0;
+
+	if (!(host->caps2 & MMC_CAP2_NO_MMC))
+		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->card || mmc_card_removed(host->card))
+		return 1;
+
+	ret = host->bus_ops->alive(host);
+
+	/*
+	 * Card detect status and alive check may be out of sync if card is
+	 * removed slowly, when card detect switch changes while card/slot
+	 * pads are still contacted in hardware (refer to "SD Card Mechanical
+	 * Addendum, Appendix C: Card Detection Switch"). So reschedule a
+	 * detect work 200ms later for this case.
+	 */
+	if (!ret && host->ops->get_cd && !host->ops->get_cd(host)) {
+		mmc_detect_change(host, msecs_to_jiffies(200));
+		pr_debug("%s: card removed too slowly\n", mmc_hostname(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;
+
+	if (!mmc_card_is_removable(host))
+		return 0;
+
+	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))
+		return ret;
+
+	host->detect_change = 0;
+	if (!ret) {
+		ret = _mmc_detect_card_removed(host);
+		if (ret && (host->caps & MMC_CAP_NEEDS_POLL)) {
+			/*
+			 * 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, false);
+		}
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL(mmc_detect_card_removed);
+
+void mmc_rescan(struct work_struct *work)
+{
+	struct mmc_host *host =
+		container_of(work, struct mmc_host, detect.work);
+	int i;
+
+	if (host->rescan_disable)
+		return;
+
+	/* If there is a non-removable card registered, only scan once */
+	if (!mmc_card_is_removable(host) && host->rescan_entered)
+		return;
+	host->rescan_entered = 1;
+
+	if (host->trigger_card_event && host->ops->card_event) {
+		mmc_claim_host(host);
+		host->ops->card_event(host);
+		mmc_release_host(host);
+		host->trigger_card_event = false;
+	}
+
+	mmc_bus_get(host);
+
+	/*
+	 * if there is a _removable_ card registered, check whether it is
+	 * still present
+	 */
+	if (host->bus_ops && !host->bus_dead && mmc_card_is_removable(host))
+		host->bus_ops->detect(host);
+
+	host->detect_change = 0;
+
+	/*
+	 * 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);
+
+	mmc_claim_host(host);
+	if (mmc_card_is_removable(host) && host->ops->get_cd &&
+			host->ops->get_cd(host) == 0) {
+		mmc_power_off(host);
+		mmc_release_host(host);
+		goto out;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(freqs); i++) {
+		if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min)))
+			break;
+		if (freqs[i] <= host->f_min)
+			break;
+	}
+	mmc_release_host(host);
+
+ out:
+	if (host->caps & MMC_CAP_NEEDS_POLL)
+		mmc_schedule_delayed_work(&host->detect, HZ);
+}
+
+void mmc_start_host(struct mmc_host *host)
+{
+	host->f_init = max(freqs[0], host->f_min);
+	host->rescan_disable = 0;
+	host->ios.power_mode = MMC_POWER_UNDEFINED;
+
+	if (!(host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)) {
+		mmc_claim_host(host);
+		mmc_power_up(host, host->ocr_avail);
+		mmc_release_host(host);
+	}
+
+	mmc_gpiod_request_cd_irq(host);
+	_mmc_detect_change(host, 0, false);
+}
+
+void mmc_stop_host(struct mmc_host *host)
+{
+	if (host->slot.cd_irq >= 0) {
+		mmc_gpio_set_cd_wake(host, false);
+		disable_irq(host->slot.cd_irq);
+	}
+
+	host->rescan_disable = 1;
+	cancel_delayed_work_sync(&host->detect);
+
+	/* 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 */
+		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);
+
+	mmc_claim_host(host);
+	mmc_power_off(host);
+	mmc_release_host(host);
+}
+
+#ifdef CONFIG_PM_SLEEP
+/* 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.
+*/
+static 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;
+	int err = 0;
+
+	switch (mode) {
+	case PM_HIBERNATION_PREPARE:
+	case PM_SUSPEND_PREPARE:
+	case PM_RESTORE_PREPARE:
+		spin_lock_irqsave(&host->lock, flags);
+		host->rescan_disable = 1;
+		spin_unlock_irqrestore(&host->lock, flags);
+		cancel_delayed_work_sync(&host->detect);
+
+		if (!host->bus_ops)
+			break;
+
+		/* Validate prerequisites for suspend */
+		if (host->bus_ops->pre_suspend)
+			err = host->bus_ops->pre_suspend(host);
+		if (!err)
+			break;
+
+		if (!mmc_card_is_removable(host)) {
+			dev_warn(mmc_dev(host),
+				 "pre_suspend failed for non-removable host: "
+				 "%d\n", err);
+			/* Avoid removing non-removable hosts */
+			break;
+		}
+
+		/* Calling bus_ops->remove() with a claimed host can deadlock */
+		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);
+		host->rescan_disable = 0;
+		spin_unlock_irqrestore(&host->lock, flags);
+		_mmc_detect_change(host, 0, false);
+
+	}
+
+	return 0;
+}
+
+void mmc_register_pm_notifier(struct mmc_host *host)
+{
+	host->pm_notify.notifier_call = mmc_pm_notify;
+	register_pm_notifier(&host->pm_notify);
+}
+
+void mmc_unregister_pm_notifier(struct mmc_host *host)
+{
+	unregister_pm_notifier(&host->pm_notify);
+}
+#endif
+
+static int __init mmc_init(void)
+{
+	int ret;
+
+	ret = mmc_register_bus();
+	if (ret)
+		return ret;
+
+	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();
+	return ret;
+}
+
+static void __exit mmc_exit(void)
+{
+	sdio_unregister_bus();
+	mmc_unregister_host_class();
+	mmc_unregister_bus();
+}
+
+subsys_initcall(mmc_init);
+module_exit(mmc_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
new file mode 100644
index 000000000..3071b644e
--- /dev/null
+++ b/drivers/mmc/core/core.h
@@ -0,0 +1,185 @@
+/*
+ *  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>
+#include <linux/sched.h>
+
+struct mmc_host;
+struct mmc_card;
+struct mmc_request;
+
+#define MMC_CMD_RETRIES        3
+
+struct mmc_bus_ops {
+	void (*remove)(struct mmc_host *);
+	void (*detect)(struct mmc_host *);
+	int (*pre_suspend)(struct mmc_host *);
+	int (*suspend)(struct mmc_host *);
+	int (*resume)(struct mmc_host *);
+	int (*runtime_suspend)(struct mmc_host *);
+	int (*runtime_resume)(struct mmc_host *);
+	int (*alive)(struct mmc_host *);
+	int (*shutdown)(struct mmc_host *);
+	int (*hw_reset)(struct mmc_host *);
+	int (*sw_reset)(struct mmc_host *);
+	bool (*cache_enabled)(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);
+
+struct device_node *mmc_of_find_child_device(struct mmc_host *host,
+		unsigned func_num);
+
+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_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_uhs_voltage(struct mmc_host *host, u32 ocr);
+int mmc_host_set_uhs_voltage(struct mmc_host *host);
+int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage);
+void mmc_set_initial_signal_voltage(struct mmc_host *host);
+void mmc_set_timing(struct mmc_host *host, unsigned int timing);
+void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type);
+int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr,
+			      int card_drv_type, int *drv_type);
+void mmc_power_up(struct mmc_host *host, u32 ocr);
+void mmc_power_off(struct mmc_host *host);
+void mmc_power_cycle(struct mmc_host *host, u32 ocr);
+void mmc_set_initial_state(struct mmc_host *host);
+
+static inline void mmc_delay(unsigned int ms)
+{
+	if (ms <= 20)
+		usleep_range(ms * 1000, ms * 1250);
+	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_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);
+
+int mmc_execute_tuning(struct mmc_card *card);
+int mmc_hs200_to_hs400(struct mmc_card *card);
+int mmc_hs400_to_hs200(struct mmc_card *card);
+
+#ifdef CONFIG_PM_SLEEP
+void mmc_register_pm_notifier(struct mmc_host *host);
+void mmc_unregister_pm_notifier(struct mmc_host *host);
+#else
+static inline void mmc_register_pm_notifier(struct mmc_host *host) { }
+static inline void mmc_unregister_pm_notifier(struct mmc_host *host) { }
+#endif
+
+void mmc_wait_for_req_done(struct mmc_host *host, struct mmc_request *mrq);
+bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq);
+
+int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq);
+
+int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
+		unsigned int arg);
+int mmc_can_erase(struct mmc_card *card);
+int mmc_can_trim(struct mmc_card *card);
+int mmc_can_discard(struct mmc_card *card);
+int mmc_can_sanitize(struct mmc_card *card);
+int mmc_can_secure_erase_trim(struct mmc_card *card);
+int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
+			unsigned int nr);
+unsigned int mmc_calc_max_discard(struct mmc_card *card);
+
+int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen);
+int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount,
+			bool is_rel_write);
+
+int __mmc_claim_host(struct mmc_host *host, struct mmc_ctx *ctx,
+		     atomic_t *abort);
+void mmc_release_host(struct mmc_host *host);
+void mmc_get_card(struct mmc_card *card, struct mmc_ctx *ctx);
+void mmc_put_card(struct mmc_card *card, struct mmc_ctx *ctx);
+
+/**
+ *	mmc_claim_host - exclusively claim a host
+ *	@host: mmc host to claim
+ *
+ *	Claim a host for a set of operations.
+ */
+static inline void mmc_claim_host(struct mmc_host *host)
+{
+	__mmc_claim_host(host, NULL, NULL);
+}
+
+int mmc_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq);
+void mmc_cqe_post_req(struct mmc_host *host, struct mmc_request *mrq);
+int mmc_cqe_recovery(struct mmc_host *host);
+
+/**
+ *	mmc_pre_req - Prepare for a new request
+ *	@host: MMC host to prepare command
+ *	@mrq: MMC request to prepare for
+ *
+ *	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 inline void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq)
+{
+	if (host->ops->pre_req)
+		host->ops->pre_req(host, mrq);
+}
+
+/**
+ *	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 request is running.
+ */
+static inline void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq,
+				int err)
+{
+	if (host->ops->post_req)
+		host->ops->post_req(host, mrq, err);
+}
+
+static inline bool mmc_cache_enabled(struct mmc_host *host)
+{
+	if (host->bus_ops->cache_enabled)
+		return host->bus_ops->cache_enabled(host);
+
+	return false;
+}
+
+#endif
diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c
new file mode 100644
index 000000000..d2275c5a2
--- /dev/null
+++ b/drivers/mmc/core/debugfs.c
@@ -0,0 +1,313 @@
+/*
+ * 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 "card.h"
+#include "host.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_SDR12:
+		str = "sd uhs SDR12";
+		break;
+	case MMC_TIMING_UHS_SDR25:
+		str = "sd uhs SDR25";
+		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_DDR52:
+		str = "mmc DDR52";
+		break;
+	case MMC_TIMING_MMC_HS200:
+		str = "mmc HS200";
+		break;
+	case MMC_TIMING_MMC_HS400:
+		str = mmc_card_hs400es(host->card) ?
+			"mmc HS400 enhanced strobe" : "mmc HS400";
+		break;
+	default:
+		str = "invalid";
+		break;
+	}
+	seq_printf(s, "timing spec:\t%u (%s)\n", ios->timing, str);
+
+	switch (ios->signal_voltage) {
+	case MMC_SIGNAL_VOLTAGE_330:
+		str = "3.30 V";
+		break;
+	case MMC_SIGNAL_VOLTAGE_180:
+		str = "1.80 V";
+		break;
+	case MMC_SIGNAL_VOLTAGE_120:
+		str = "1.20 V";
+		break;
+	default:
+		str = "invalid";
+		break;
+	}
+	seq_printf(s, "signal voltage:\t%u (%s)\n", ios->signal_voltage, str);
+
+	switch (ios->drv_type) {
+	case MMC_SET_DRIVER_TYPE_A:
+		str = "driver type A";
+		break;
+	case MMC_SET_DRIVER_TYPE_B:
+		str = "driver type B";
+		break;
+	case MMC_SET_DRIVER_TYPE_C:
+		str = "driver type C";
+		break;
+	case MMC_SET_DRIVER_TYPE_D:
+		str = "driver type D";
+		break;
+	default:
+		str = "invalid";
+		break;
+	}
+	seq_printf(s, "driver type:\t%u (%s)\n", ios->drv_type, str);
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(mmc_ios);
+
+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 != 0 && (val > host->f_max || val < host->f_min))
+		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_x32("caps", S_IRUSR, root, &host->caps))
+		goto err_node;
+
+	if (!debugfs_create_x32("caps2", S_IRUSR, root, &host->caps2))
+		goto err_node;
+
+	if (!debugfs_create_file("clock", S_IRUSR | S_IWUSR, root, host,
+			&mmc_clock_fops))
+		goto err_node;
+
+#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);
+}
+
+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;
+
+	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);
+	card->debugfs_root = NULL;
+}
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
new file mode 100644
index 000000000..9de8a3553
--- /dev/null
+++ b/drivers/mmc/core/host.c
@@ -0,0 +1,496 @@
+/*
+ *  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/of.h>
+#include <linux/of_gpio.h>
+#include <linux/pagemap.h>
+#include <linux/export.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/slot-gpio.h>
+
+#include "core.h"
+#include "host.h"
+#include "slot-gpio.h"
+#include "pwrseq.h"
+#include "sdio_ops.h"
+
+#define cls_dev_to_mmc_host(d)	container_of(d, struct mmc_host, class_dev)
+
+static DEFINE_IDA(mmc_host_ida);
+
+static void mmc_host_classdev_release(struct device *dev)
+{
+	struct mmc_host *host = cls_dev_to_mmc_host(dev);
+	ida_simple_remove(&mmc_host_ida, host->index);
+	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);
+}
+
+void mmc_retune_enable(struct mmc_host *host)
+{
+	host->can_retune = 1;
+	if (host->retune_period)
+		mod_timer(&host->retune_timer,
+			  jiffies + host->retune_period * HZ);
+}
+
+/*
+ * Pause re-tuning for a small set of operations.  The pause begins after the
+ * next command and after first doing re-tuning.
+ */
+void mmc_retune_pause(struct mmc_host *host)
+{
+	if (!host->retune_paused) {
+		host->retune_paused = 1;
+		mmc_retune_needed(host);
+		mmc_retune_hold(host);
+	}
+}
+EXPORT_SYMBOL(mmc_retune_pause);
+
+void mmc_retune_unpause(struct mmc_host *host)
+{
+	if (host->retune_paused) {
+		host->retune_paused = 0;
+		mmc_retune_release(host);
+	}
+}
+EXPORT_SYMBOL(mmc_retune_unpause);
+
+void mmc_retune_disable(struct mmc_host *host)
+{
+	mmc_retune_unpause(host);
+	host->can_retune = 0;
+	del_timer_sync(&host->retune_timer);
+	host->retune_now = 0;
+	host->need_retune = 0;
+}
+
+void mmc_retune_timer_stop(struct mmc_host *host)
+{
+	del_timer_sync(&host->retune_timer);
+}
+EXPORT_SYMBOL(mmc_retune_timer_stop);
+
+void mmc_retune_hold(struct mmc_host *host)
+{
+	if (!host->hold_retune)
+		host->retune_now = 1;
+	host->hold_retune += 1;
+}
+
+void mmc_retune_release(struct mmc_host *host)
+{
+	if (host->hold_retune)
+		host->hold_retune -= 1;
+	else
+		WARN_ON(1);
+}
+EXPORT_SYMBOL(mmc_retune_release);
+
+int mmc_retune(struct mmc_host *host)
+{
+	bool return_to_hs400 = false;
+	int err;
+
+	if (host->retune_now)
+		host->retune_now = 0;
+	else
+		return 0;
+
+	if (!host->need_retune || host->doing_retune || !host->card)
+		return 0;
+
+	host->need_retune = 0;
+
+	host->doing_retune = 1;
+
+	if (host->ios.timing == MMC_TIMING_MMC_HS400) {
+		err = mmc_hs400_to_hs200(host->card);
+		if (err)
+			goto out;
+
+		return_to_hs400 = true;
+	}
+
+	err = mmc_execute_tuning(host->card);
+	if (err)
+		goto out;
+
+	if (return_to_hs400)
+		err = mmc_hs200_to_hs400(host->card);
+out:
+	host->doing_retune = 0;
+
+	return err;
+}
+
+static void mmc_retune_timer(struct timer_list *t)
+{
+	struct mmc_host *host = from_timer(host, t, retune_timer);
+
+	mmc_retune_needed(host);
+}
+
+/**
+ *	mmc_of_parse() - parse host's device-tree node
+ *	@host: host whose node should be parsed.
+ *
+ * To keep the rest of the MMC subsystem unaware of whether DT has been
+ * used to to instantiate and configure this host instance or not, we
+ * parse the properties and set respective generic mmc-host flags and
+ * parameters.
+ */
+int mmc_of_parse(struct mmc_host *host)
+{
+	struct device *dev = host->parent;
+	u32 bus_width, drv_type, cd_debounce_delay_ms;
+	int ret;
+	bool cd_cap_invert, cd_gpio_invert = false;
+	bool ro_cap_invert, ro_gpio_invert = false;
+
+	if (!dev || !dev_fwnode(dev))
+		return 0;
+
+	/* "bus-width" is translated to MMC_CAP_*_BIT_DATA flags */
+	if (device_property_read_u32(dev, "bus-width", &bus_width) < 0) {
+		dev_dbg(host->parent,
+			"\"bus-width\" property is missing, assuming 1 bit.\n");
+		bus_width = 1;
+	}
+
+	switch (bus_width) {
+	case 8:
+		host->caps |= MMC_CAP_8_BIT_DATA;
+		/* Hosts capable of 8-bit transfers can also do 4 bits */
+	case 4:
+		host->caps |= MMC_CAP_4_BIT_DATA;
+		break;
+	case 1:
+		break;
+	default:
+		dev_err(host->parent,
+			"Invalid \"bus-width\" value %u!\n", bus_width);
+		return -EINVAL;
+	}
+
+	/* f_max is obtained from the optional "max-frequency" property */
+	device_property_read_u32(dev, "max-frequency", &host->f_max);
+
+	/*
+	 * Configure CD and WP pins. They are both by default active low to
+	 * match the SDHCI spec. If GPIOs are provided for CD and / or WP, the
+	 * mmc-gpio helpers are used to attach, configure and use them. If
+	 * polarity inversion is specified in DT, one of MMC_CAP2_CD_ACTIVE_HIGH
+	 * and MMC_CAP2_RO_ACTIVE_HIGH capability-2 flags is set. If the
+	 * "broken-cd" property is provided, the MMC_CAP_NEEDS_POLL capability
+	 * is set. If the "non-removable" property is found, the
+	 * MMC_CAP_NONREMOVABLE capability is set and no card-detection
+	 * configuration is performed.
+	 */
+
+	/* Parse Card Detection */
+	if (device_property_read_bool(dev, "non-removable")) {
+		host->caps |= MMC_CAP_NONREMOVABLE;
+	} else {
+		cd_cap_invert = device_property_read_bool(dev, "cd-inverted");
+
+		if (device_property_read_u32(dev, "cd-debounce-delay-ms",
+					     &cd_debounce_delay_ms))
+			cd_debounce_delay_ms = 200;
+
+		if (device_property_read_bool(dev, "broken-cd"))
+			host->caps |= MMC_CAP_NEEDS_POLL;
+
+		ret = mmc_gpiod_request_cd(host, "cd", 0, true,
+					   cd_debounce_delay_ms * 1000,
+					   &cd_gpio_invert);
+		if (!ret)
+			dev_info(host->parent, "Got CD GPIO\n");
+		else if (ret != -ENOENT && ret != -ENOSYS)
+			return ret;
+
+		/*
+		 * There are two ways to flag that the CD line is inverted:
+		 * through the cd-inverted flag and by the GPIO line itself
+		 * being inverted from the GPIO subsystem. This is a leftover
+		 * from the times when the GPIO subsystem did not make it
+		 * possible to flag a line as inverted.
+		 *
+		 * If the capability on the host AND the GPIO line are
+		 * both inverted, the end result is that the CD line is
+		 * not inverted.
+		 */
+		if (cd_cap_invert ^ cd_gpio_invert)
+			host->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
+	}
+
+	/* Parse Write Protection */
+	ro_cap_invert = device_property_read_bool(dev, "wp-inverted");
+
+	ret = mmc_gpiod_request_ro(host, "wp", 0, false, 0, &ro_gpio_invert);
+	if (!ret)
+		dev_info(host->parent, "Got WP GPIO\n");
+	else if (ret != -ENOENT && ret != -ENOSYS)
+		return ret;
+
+	if (device_property_read_bool(dev, "disable-wp"))
+		host->caps2 |= MMC_CAP2_NO_WRITE_PROTECT;
+
+	/* See the comment on CD inversion above */
+	if (ro_cap_invert ^ ro_gpio_invert)
+		host->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
+
+	if (device_property_read_bool(dev, "cap-sd-highspeed"))
+		host->caps |= MMC_CAP_SD_HIGHSPEED;
+	if (device_property_read_bool(dev, "cap-mmc-highspeed"))
+		host->caps |= MMC_CAP_MMC_HIGHSPEED;
+	if (device_property_read_bool(dev, "sd-uhs-sdr12"))
+		host->caps |= MMC_CAP_UHS_SDR12;
+	if (device_property_read_bool(dev, "sd-uhs-sdr25"))
+		host->caps |= MMC_CAP_UHS_SDR25;
+	if (device_property_read_bool(dev, "sd-uhs-sdr50"))
+		host->caps |= MMC_CAP_UHS_SDR50;
+	if (device_property_read_bool(dev, "sd-uhs-sdr104"))
+		host->caps |= MMC_CAP_UHS_SDR104;
+	if (device_property_read_bool(dev, "sd-uhs-ddr50"))
+		host->caps |= MMC_CAP_UHS_DDR50;
+	if (device_property_read_bool(dev, "cap-power-off-card"))
+		host->caps |= MMC_CAP_POWER_OFF_CARD;
+	if (device_property_read_bool(dev, "cap-mmc-hw-reset"))
+		host->caps |= MMC_CAP_HW_RESET;
+	if (device_property_read_bool(dev, "cap-sdio-irq"))
+		host->caps |= MMC_CAP_SDIO_IRQ;
+	if (device_property_read_bool(dev, "full-pwr-cycle"))
+		host->caps2 |= MMC_CAP2_FULL_PWR_CYCLE;
+	if (device_property_read_bool(dev, "keep-power-in-suspend"))
+		host->pm_caps |= MMC_PM_KEEP_POWER;
+	if (device_property_read_bool(dev, "wakeup-source") ||
+	    device_property_read_bool(dev, "enable-sdio-wakeup")) /* legacy */
+		host->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
+	if (device_property_read_bool(dev, "mmc-ddr-3_3v"))
+		host->caps |= MMC_CAP_3_3V_DDR;
+	if (device_property_read_bool(dev, "mmc-ddr-1_8v"))
+		host->caps |= MMC_CAP_1_8V_DDR;
+	if (device_property_read_bool(dev, "mmc-ddr-1_2v"))
+		host->caps |= MMC_CAP_1_2V_DDR;
+	if (device_property_read_bool(dev, "mmc-hs200-1_8v"))
+		host->caps2 |= MMC_CAP2_HS200_1_8V_SDR;
+	if (device_property_read_bool(dev, "mmc-hs200-1_2v"))
+		host->caps2 |= MMC_CAP2_HS200_1_2V_SDR;
+	if (device_property_read_bool(dev, "mmc-hs400-1_8v"))
+		host->caps2 |= MMC_CAP2_HS400_1_8V | MMC_CAP2_HS200_1_8V_SDR;
+	if (device_property_read_bool(dev, "mmc-hs400-1_2v"))
+		host->caps2 |= MMC_CAP2_HS400_1_2V | MMC_CAP2_HS200_1_2V_SDR;
+	if (device_property_read_bool(dev, "mmc-hs400-enhanced-strobe"))
+		host->caps2 |= MMC_CAP2_HS400_ES;
+	if (device_property_read_bool(dev, "no-sdio"))
+		host->caps2 |= MMC_CAP2_NO_SDIO;
+	if (device_property_read_bool(dev, "no-sd"))
+		host->caps2 |= MMC_CAP2_NO_SD;
+	if (device_property_read_bool(dev, "no-mmc"))
+		host->caps2 |= MMC_CAP2_NO_MMC;
+
+	/* Must be after "non-removable" check */
+	if (device_property_read_u32(dev, "fixed-emmc-driver-type", &drv_type) == 0) {
+		if (host->caps & MMC_CAP_NONREMOVABLE)
+			host->fixed_drv_type = drv_type;
+		else
+			dev_err(host->parent,
+				"can't use fixed driver type, media is removable\n");
+	}
+
+	host->dsr_req = !device_property_read_u32(dev, "dsr", &host->dsr);
+	if (host->dsr_req && (host->dsr & ~0xffff)) {
+		dev_err(host->parent,
+			"device tree specified broken value for DSR: 0x%x, ignoring\n",
+			host->dsr);
+		host->dsr_req = 0;
+	}
+
+	device_property_read_u32(dev, "post-power-on-delay-ms",
+				 &host->ios.power_delay_ms);
+
+	return mmc_pwrseq_alloc(host);
+}
+
+EXPORT_SYMBOL(mmc_of_parse);
+
+/**
+ *	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;
+
+	host = kzalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
+	if (!host)
+		return NULL;
+
+	/* scanning will be enabled when we're ready */
+	host->rescan_disable = 1;
+
+	err = ida_simple_get(&mmc_host_ida, 0, 0, GFP_KERNEL);
+	if (err < 0) {
+		kfree(host);
+		return NULL;
+	}
+
+	host->index = err;
+
+	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);
+	device_enable_async_suspend(&host->class_dev);
+
+	if (mmc_gpio_alloc(host)) {
+		put_device(&host->class_dev);
+		return NULL;
+	}
+
+	spin_lock_init(&host->lock);
+	init_waitqueue_head(&host->wq);
+	INIT_DELAYED_WORK(&host->detect, mmc_rescan);
+	INIT_DELAYED_WORK(&host->sdio_irq_work, sdio_irq_work);
+	timer_setup(&host->retune_timer, mmc_retune_timer, 0);
+
+	/*
+	 * 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_SIZE;
+
+	host->max_req_size = PAGE_SIZE;
+	host->max_blk_size = 512;
+	host->max_blk_count = PAGE_SIZE / 512;
+
+	host->fixed_drv_type = -EINVAL;
+	host->ios.power_delay_ms = 10;
+
+	return host;
+}
+
+EXPORT_SYMBOL(mmc_alloc_host);
+
+static int mmc_validate_host_caps(struct mmc_host *host)
+{
+	if (host->caps & MMC_CAP_SDIO_IRQ && !host->ops->enable_sdio_irq) {
+		dev_warn(host->parent, "missing ->enable_sdio_irq() ops\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/**
+ *	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;
+
+	err = mmc_validate_host_caps(host);
+	if (err)
+		return err;
+
+	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_start_host(host);
+	mmc_register_pm_notifier(host);
+
+	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)
+{
+	mmc_unregister_pm_notifier(host);
+	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);
+}
+
+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)
+{
+	mmc_pwrseq_free(host);
+	put_device(&host->class_dev);
+}
+
+EXPORT_SYMBOL(mmc_free_host);
diff --git a/drivers/mmc/core/host.h b/drivers/mmc/core/host.h
new file mode 100644
index 000000000..4805438c0
--- /dev/null
+++ b/drivers/mmc/core/host.h
@@ -0,0 +1,84 @@
+/*
+ *  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);
+
+void mmc_retune_enable(struct mmc_host *host);
+void mmc_retune_disable(struct mmc_host *host);
+void mmc_retune_hold(struct mmc_host *host);
+void mmc_retune_release(struct mmc_host *host);
+int mmc_retune(struct mmc_host *host);
+void mmc_retune_pause(struct mmc_host *host);
+void mmc_retune_unpause(struct mmc_host *host);
+
+static inline void mmc_retune_hold_now(struct mmc_host *host)
+{
+	host->retune_now = 0;
+	host->hold_retune += 1;
+}
+
+static inline void mmc_retune_recheck(struct mmc_host *host)
+{
+	if (host->hold_retune <= 1)
+		host->retune_now = 1;
+}
+
+static inline int mmc_host_cmd23(struct mmc_host *host)
+{
+	return host->caps & MMC_CAP_CMD23;
+}
+
+static inline bool mmc_host_done_complete(struct mmc_host *host)
+{
+	return host->caps & MMC_CAP_DONE_COMPLETE;
+}
+
+static inline int mmc_boot_partition_access(struct mmc_host *host)
+{
+	return !(host->caps2 & MMC_CAP2_BOOTPART_NOACC);
+}
+
+static inline int mmc_host_uhs(struct mmc_host *host)
+{
+	return host->caps &
+		(MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
+		 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 |
+		 MMC_CAP_UHS_DDR50) &&
+	       host->caps & MMC_CAP_4_BIT_DATA;
+}
+
+static inline bool mmc_card_hs200(struct mmc_card *card)
+{
+	return card->host->ios.timing == MMC_TIMING_MMC_HS200;
+}
+
+static inline bool mmc_card_ddr52(struct mmc_card *card)
+{
+	return card->host->ios.timing == MMC_TIMING_MMC_DDR52;
+}
+
+static inline bool mmc_card_hs400(struct mmc_card *card)
+{
+	return card->host->ios.timing == MMC_TIMING_MMC_HS400;
+}
+
+static inline bool mmc_card_hs400es(struct mmc_card *card)
+{
+	return card->host->ios.enhanced_strobe;
+}
+
+#endif
+
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
new file mode 100644
index 000000000..745a4b07f
--- /dev/null
+++ b/drivers/mmc/core/mmc.c
@@ -0,0 +1,2266 @@
+/*
+ *  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/of.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/pm_runtime.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/mmc.h>
+
+#include "core.h"
+#include "card.h"
+#include "host.h"
+#include "bus.h"
+#include "mmc_ops.h"
+#include "quirks.h"
+#include "sd_ops.h"
+#include "pwrseq.h"
+
+#define DEFAULT_CMD6_TIMEOUT_MS	500
+#define MIN_CACHE_EN_TIMEOUT_MS 1600
+
+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 taac_exp[] = {
+	1,	10,	100,	1000,	10000,	100000,	1000000, 10000000,
+};
+
+static const unsigned int taac_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.prv		= UNSTUFF_BITS(resp, 48, 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->taac_ns	 = (taac_exp[e] * taac_mant[m] + 9) / 10;
+	csd->taac_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->dsr_imp = UNSTUFF_BITS(resp, 76, 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;
+}
+
+static void mmc_select_card_type(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+	u8 card_type = card->ext_csd.raw_card_type;
+	u32 caps = host->caps, caps2 = host->caps2;
+	unsigned int hs_max_dtr = 0, hs200_max_dtr = 0;
+	unsigned int avail_type = 0;
+
+	if (caps & MMC_CAP_MMC_HIGHSPEED &&
+	    card_type & EXT_CSD_CARD_TYPE_HS_26) {
+		hs_max_dtr = MMC_HIGH_26_MAX_DTR;
+		avail_type |= EXT_CSD_CARD_TYPE_HS_26;
+	}
+
+	if (caps & MMC_CAP_MMC_HIGHSPEED &&
+	    card_type & EXT_CSD_CARD_TYPE_HS_52) {
+		hs_max_dtr = MMC_HIGH_52_MAX_DTR;
+		avail_type |= EXT_CSD_CARD_TYPE_HS_52;
+	}
+
+	if (caps & (MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR) &&
+	    card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) {
+		hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
+		avail_type |= EXT_CSD_CARD_TYPE_DDR_1_8V;
+	}
+
+	if (caps & MMC_CAP_1_2V_DDR &&
+	    card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
+		hs_max_dtr = MMC_HIGH_DDR_MAX_DTR;
+		avail_type |= EXT_CSD_CARD_TYPE_DDR_1_2V;
+	}
+
+	if (caps2 & MMC_CAP2_HS200_1_8V_SDR &&
+	    card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) {
+		hs200_max_dtr = MMC_HS200_MAX_DTR;
+		avail_type |= EXT_CSD_CARD_TYPE_HS200_1_8V;
+	}
+
+	if (caps2 & MMC_CAP2_HS200_1_2V_SDR &&
+	    card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) {
+		hs200_max_dtr = MMC_HS200_MAX_DTR;
+		avail_type |= EXT_CSD_CARD_TYPE_HS200_1_2V;
+	}
+
+	if (caps2 & MMC_CAP2_HS400_1_8V &&
+	    card_type & EXT_CSD_CARD_TYPE_HS400_1_8V) {
+		hs200_max_dtr = MMC_HS200_MAX_DTR;
+		avail_type |= EXT_CSD_CARD_TYPE_HS400_1_8V;
+	}
+
+	if (caps2 & MMC_CAP2_HS400_1_2V &&
+	    card_type & EXT_CSD_CARD_TYPE_HS400_1_2V) {
+		hs200_max_dtr = MMC_HS200_MAX_DTR;
+		avail_type |= EXT_CSD_CARD_TYPE_HS400_1_2V;
+	}
+
+	if ((caps2 & MMC_CAP2_HS400_ES) &&
+	    card->ext_csd.strobe_support &&
+	    (avail_type & EXT_CSD_CARD_TYPE_HS400))
+		avail_type |= EXT_CSD_CARD_TYPE_HS400ES;
+
+	card->ext_csd.hs_max_dtr = hs_max_dtr;
+	card->ext_csd.hs200_max_dtr = hs200_max_dtr;
+	card->mmc_avail_type = avail_type;
+}
+
+static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
+{
+	u8 hc_erase_grp_sz, hc_wp_grp_sz;
+
+	/*
+	 * Disable these attributes by default
+	 */
+	card->ext_csd.enhanced_area_offset = -EINVAL;
+	card->ext_csd.enhanced_area_size = -EINVAL;
+
+	/*
+	 * 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.
+	 */
+	if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
+	    (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
+		if (card->ext_csd.partition_setting_completed) {
+			hc_erase_grp_sz =
+				ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+			hc_wp_grp_sz =
+				ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+
+			/*
+			 * calculate the enhanced data area offset, in bytes
+			 */
+			card->ext_csd.enhanced_area_offset =
+				(((unsigned long long)ext_csd[139]) << 24) +
+				(((unsigned long long)ext_csd[138]) << 16) +
+				(((unsigned long long)ext_csd[137]) << 8) +
+				(((unsigned long long)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 {
+			pr_warn("%s: defines enhanced area without partition setting complete\n",
+				mmc_hostname(card->host));
+		}
+	}
+}
+
+static void mmc_part_add(struct mmc_card *card, u64 size,
+			 unsigned int part_cfg, char *name, int idx, bool ro,
+			 int area_type)
+{
+	card->part[card->nr_parts].size = size;
+	card->part[card->nr_parts].part_cfg = part_cfg;
+	sprintf(card->part[card->nr_parts].name, name, idx);
+	card->part[card->nr_parts].force_ro = ro;
+	card->part[card->nr_parts].area_type = area_type;
+	card->nr_parts++;
+}
+
+static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
+{
+	int idx;
+	u8 hc_erase_grp_sz, hc_wp_grp_sz;
+	u64 part_size;
+
+	/*
+	 * 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) {
+		hc_erase_grp_sz =
+			ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+		hc_wp_grp_sz =
+			ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+
+		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;
+			if (card->ext_csd.partition_setting_completed == 0) {
+				pr_warn("%s: has partition size defined without partition complete\n",
+					mmc_hostname(card->host));
+				break;
+			}
+			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 *= (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);
+		}
+	}
+}
+
+/* Minimum partition switch timeout in milliseconds */
+#define MMC_MIN_PART_SWITCH_TIME	300
+
+/*
+ * Decode extended CSD.
+ */
+static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
+{
+	int err = 0, idx;
+	u64 part_size;
+	struct device_node *np;
+	bool broken_hpi = false;
+
+	/* 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;
+		}
+	}
+
+	np = mmc_of_find_child_device(card->host, 0);
+	if (np && of_device_is_compatible(np, "mmc-card"))
+		broken_hpi = of_property_read_bool(np, "broken-hpi");
+	of_node_put(np);
+
+	/*
+	 * The EXT_CSD format is meant to be forward compatible. As long
+	 * as CSD_STRUCTURE does not change, all values for EXT_CSD_REV
+	 * are authorized, see JEDEC JESD84-B50 section B.8.
+	 */
+	card->ext_csd.rev = ext_csd[EXT_CSD_REV];
+
+	/* fixup device after ext_csd revision field is updated */
+	mmc_fixup_device(card, mmc_ext_csd_fixups);
+
+	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.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];
+	card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
+	mmc_select_card_type(card);
+
+	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];
+	card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
+	card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH];
+	if (card->ext_csd.rev >= 4) {
+		if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
+		    EXT_CSD_PART_SETTING_COMPLETED)
+			card->ext_csd.partition_setting_completed = 1;
+		else
+			card->ext_csd.partition_setting_completed = 0;
+
+		mmc_manage_enhanced_area(card, ext_csd);
+
+		mmc_manage_gp_partitions(card, ext_csd);
+
+		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;
+
+		/* Save power class values */
+		card->ext_csd.raw_pwr_cl_52_195 =
+			ext_csd[EXT_CSD_PWR_CL_52_195];
+		card->ext_csd.raw_pwr_cl_26_195 =
+			ext_csd[EXT_CSD_PWR_CL_26_195];
+		card->ext_csd.raw_pwr_cl_52_360 =
+			ext_csd[EXT_CSD_PWR_CL_52_360];
+		card->ext_csd.raw_pwr_cl_26_360 =
+			ext_csd[EXT_CSD_PWR_CL_26_360];
+		card->ext_csd.raw_pwr_cl_200_195 =
+			ext_csd[EXT_CSD_PWR_CL_200_195];
+		card->ext_csd.raw_pwr_cl_200_360 =
+			ext_csd[EXT_CSD_PWR_CL_200_360];
+		card->ext_csd.raw_pwr_cl_ddr_52_195 =
+			ext_csd[EXT_CSD_PWR_CL_DDR_52_195];
+		card->ext_csd.raw_pwr_cl_ddr_52_360 =
+			ext_csd[EXT_CSD_PWR_CL_DDR_52_360];
+		card->ext_csd.raw_pwr_cl_ddr_200_360 =
+			ext_csd[EXT_CSD_PWR_CL_DDR_200_360];
+	}
+
+	if (card->ext_csd.rev >= 5) {
+		/* Adjust production date as per JEDEC JESD84-B451 */
+		if (card->cid.year < 2010)
+			card->cid.year += 16;
+
+		/* check whether the eMMC card supports BKOPS */
+		if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
+			card->ext_csd.bkops = 1;
+			card->ext_csd.man_bkops_en =
+					(ext_csd[EXT_CSD_BKOPS_EN] &
+						EXT_CSD_MANUAL_BKOPS_MASK);
+			card->ext_csd.raw_bkops_status =
+				ext_csd[EXT_CSD_BKOPS_STATUS];
+			if (card->ext_csd.man_bkops_en)
+				pr_debug("%s: MAN_BKOPS_EN bit is set\n",
+					mmc_hostname(card->host));
+			card->ext_csd.auto_bkops_en =
+					(ext_csd[EXT_CSD_BKOPS_EN] &
+						EXT_CSD_AUTO_BKOPS_MASK);
+			if (card->ext_csd.auto_bkops_en)
+				pr_debug("%s: AUTO_BKOPS_EN bit is set\n",
+					mmc_hostname(card->host));
+		}
+
+		/* check whether the eMMC card supports HPI */
+		if (!mmc_card_broken_hpi(card) &&
+		    !broken_hpi && (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];
+
+		/*
+		 * RPMB regions are defined in multiples of 128K.
+		 */
+		card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
+		if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)) {
+			mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
+				EXT_CSD_PART_CONFIG_ACC_RPMB,
+				"rpmb", 0, false,
+				MMC_BLK_DATA_AREA_RPMB);
+		}
+	}
+
+	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 */
+	card->ext_csd.generic_cmd6_time = DEFAULT_CMD6_TIMEOUT_MS;
+	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;
+		}
+
+		card->ext_csd.max_packed_writes =
+			ext_csd[EXT_CSD_MAX_PACKED_WRITES];
+		card->ext_csd.max_packed_reads =
+			ext_csd[EXT_CSD_MAX_PACKED_READS];
+	} else {
+		card->ext_csd.data_sector_size = 512;
+	}
+
+	/*
+	 * GENERIC_CMD6_TIME is to be used "unless a specific timeout is defined
+	 * when accessing a specific field", so use it here if there is no
+	 * PARTITION_SWITCH_TIME.
+	 */
+	if (!card->ext_csd.part_time)
+		card->ext_csd.part_time = card->ext_csd.generic_cmd6_time;
+	/* Some eMMC set the value too low so set a minimum */
+	if (card->ext_csd.part_time < MMC_MIN_PART_SWITCH_TIME)
+		card->ext_csd.part_time = MMC_MIN_PART_SWITCH_TIME;
+
+	/* eMMC v5 or later */
+	if (card->ext_csd.rev >= 7) {
+		memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],
+		       MMC_FIRMWARE_LEN);
+		card->ext_csd.ffu_capable =
+			(ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&
+			!(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);
+
+		card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO];
+		card->ext_csd.device_life_time_est_typ_a =
+			ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A];
+		card->ext_csd.device_life_time_est_typ_b =
+			ext_csd[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B];
+	}
+
+	/* eMMC v5.1 or later */
+	if (card->ext_csd.rev >= 8) {
+		card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] &
+					     EXT_CSD_CMDQ_SUPPORTED;
+		card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] &
+					    EXT_CSD_CMDQ_DEPTH_MASK) + 1;
+		/* Exclude inefficiently small queue depths */
+		if (card->ext_csd.cmdq_depth <= 2) {
+			card->ext_csd.cmdq_support = false;
+			card->ext_csd.cmdq_depth = 0;
+		}
+		if (card->ext_csd.cmdq_support) {
+			pr_debug("%s: Command Queue supported depth %u\n",
+				 mmc_hostname(card->host),
+				 card->ext_csd.cmdq_depth);
+		}
+	}
+out:
+	return err;
+}
+
+static int mmc_read_ext_csd(struct mmc_card *card)
+{
+	u8 *ext_csd;
+	int err;
+
+	if (!mmc_can_ext_csd(card))
+		return 0;
+
+	err = mmc_get_ext_csd(card, &ext_csd);
+	if (err) {
+		/* 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_warn("%s: unable to read EXT_CSD, performance might suffer\n",
+				mmc_hostname(card->host));
+			err = 0;
+		}
+
+		return err;
+	}
+
+	err = mmc_decode_ext_csd(card, ext_csd);
+	kfree(ext_csd);
+	return err;
+}
+
+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)
+		return err;
+
+	/* 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]) &&
+		(card->ext_csd.raw_pwr_cl_52_195 ==
+			bw_ext_csd[EXT_CSD_PWR_CL_52_195]) &&
+		(card->ext_csd.raw_pwr_cl_26_195 ==
+			bw_ext_csd[EXT_CSD_PWR_CL_26_195]) &&
+		(card->ext_csd.raw_pwr_cl_52_360 ==
+			bw_ext_csd[EXT_CSD_PWR_CL_52_360]) &&
+		(card->ext_csd.raw_pwr_cl_26_360 ==
+			bw_ext_csd[EXT_CSD_PWR_CL_26_360]) &&
+		(card->ext_csd.raw_pwr_cl_200_195 ==
+			bw_ext_csd[EXT_CSD_PWR_CL_200_195]) &&
+		(card->ext_csd.raw_pwr_cl_200_360 ==
+			bw_ext_csd[EXT_CSD_PWR_CL_200_360]) &&
+		(card->ext_csd.raw_pwr_cl_ddr_52_195 ==
+			bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_195]) &&
+		(card->ext_csd.raw_pwr_cl_ddr_52_360 ==
+			bw_ext_csd[EXT_CSD_PWR_CL_DDR_52_360]) &&
+		(card->ext_csd.raw_pwr_cl_ddr_200_360 ==
+			bw_ext_csd[EXT_CSD_PWR_CL_DDR_200_360]));
+
+	if (err)
+		err = -EINVAL;
+
+	kfree(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(ffu_capable, "%d\n", card->ext_csd.ffu_capable);
+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(prv, "0x%x\n", card->cid.prv);
+MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev);
+MMC_DEV_ATTR(pre_eol_info, "0x%02x\n", card->ext_csd.pre_eol_info);
+MMC_DEV_ATTR(life_time, "0x%02x 0x%02x\n",
+	card->ext_csd.device_life_time_est_typ_a,
+	card->ext_csd.device_life_time_est_typ_b);
+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);
+MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
+MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
+MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
+MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
+MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en);
+
+static ssize_t mmc_fwrev_show(struct device *dev,
+			      struct device_attribute *attr,
+			      char *buf)
+{
+	struct mmc_card *card = mmc_dev_to_card(dev);
+
+	if (card->ext_csd.rev < 7) {
+		return sprintf(buf, "0x%x\n", card->cid.fwrev);
+	} else {
+		return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
+			       card->ext_csd.fwrev);
+	}
+}
+
+static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
+
+static ssize_t mmc_dsr_show(struct device *dev,
+			    struct device_attribute *attr,
+			    char *buf)
+{
+	struct mmc_card *card = mmc_dev_to_card(dev);
+	struct mmc_host *host = card->host;
+
+	if (card->csd.dsr_imp && host->dsr_req)
+		return sprintf(buf, "0x%x\n", host->dsr);
+	else
+		/* return default DSR value */
+		return sprintf(buf, "0x%x\n", 0x404);
+}
+
+static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
+
+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_ffu_capable.attr,
+	&dev_attr_hwrev.attr,
+	&dev_attr_manfid.attr,
+	&dev_attr_name.attr,
+	&dev_attr_oemid.attr,
+	&dev_attr_prv.attr,
+	&dev_attr_rev.attr,
+	&dev_attr_pre_eol_info.attr,
+	&dev_attr_life_time.attr,
+	&dev_attr_serial.attr,
+	&dev_attr_enhanced_area_offset.attr,
+	&dev_attr_enhanced_area_size.attr,
+	&dev_attr_raw_rpmb_size_mult.attr,
+	&dev_attr_rel_sectors.attr,
+	&dev_attr_ocr.attr,
+	&dev_attr_rca.attr,
+	&dev_attr_dsr.attr,
+	&dev_attr_cmdq_en.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(mmc_std);
+
+static struct device_type mmc_type = {
+	.groups = mmc_std_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)
+{
+	struct mmc_host *host = card->host;
+	struct mmc_ext_csd *ext_csd = &card->ext_csd;
+	unsigned int pwrclass_val = 0;
+	int err = 0;
+
+	switch (1 << host->ios.vdd) {
+	case MMC_VDD_165_195:
+		if (host->ios.clock <= MMC_HIGH_26_MAX_DTR)
+			pwrclass_val = ext_csd->raw_pwr_cl_26_195;
+		else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
+			pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
+				ext_csd->raw_pwr_cl_52_195 :
+				ext_csd->raw_pwr_cl_ddr_52_195;
+		else if (host->ios.clock <= MMC_HS200_MAX_DTR)
+			pwrclass_val = ext_csd->raw_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 <= MMC_HIGH_26_MAX_DTR)
+			pwrclass_val = ext_csd->raw_pwr_cl_26_360;
+		else if (host->ios.clock <= MMC_HIGH_52_MAX_DTR)
+			pwrclass_val = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
+				ext_csd->raw_pwr_cl_52_360 :
+				ext_csd->raw_pwr_cl_ddr_52_360;
+		else if (host->ios.clock <= MMC_HS200_MAX_DTR)
+			pwrclass_val = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?
+				ext_csd->raw_pwr_cl_ddr_200_360 :
+				ext_csd->raw_pwr_cl_200_360;
+		break;
+	default:
+		pr_warn("%s: Voltage range not supported for power class\n",
+			mmc_hostname(host));
+		return -EINVAL;
+	}
+
+	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;
+}
+
+static int mmc_select_powerclass(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+	u32 bus_width, ext_csd_bits;
+	int err, ddr;
+
+	/* Power class selection is supported for versions >= 4.0 */
+	if (!mmc_can_ext_csd(card))
+		return 0;
+
+	bus_width = host->ios.bus_width;
+	/* Power class values are defined only for 4/8 bit bus */
+	if (bus_width == MMC_BUS_WIDTH_1)
+		return 0;
+
+	ddr = card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52;
+	if (ddr)
+		ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
+			EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
+	else
+		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);
+	if (err)
+		pr_warn("%s: power class selection to bus width %d ddr %d failed\n",
+			mmc_hostname(host), 1 << bus_width, ddr);
+
+	return err;
+}
+
+/*
+ * Set the bus speed for the selected speed mode.
+ */
+static void mmc_set_bus_speed(struct mmc_card *card)
+{
+	unsigned int max_dtr = (unsigned int)-1;
+
+	if ((mmc_card_hs200(card) || mmc_card_hs400(card)) &&
+	     max_dtr > card->ext_csd.hs200_max_dtr)
+		max_dtr = card->ext_csd.hs200_max_dtr;
+	else if (mmc_card_hs(card) && 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(card->host, max_dtr);
+}
+
+/*
+ * Select the bus width amoung 4-bit and 8-bit(SDR).
+ * If the bus width is changed successfully, return the selected width value.
+ * Zero is returned instead of error value if the wide width is not supported.
+ */
+static int mmc_select_bus_width(struct mmc_card *card)
+{
+	static unsigned ext_csd_bits[] = {
+		EXT_CSD_BUS_WIDTH_8,
+		EXT_CSD_BUS_WIDTH_4,
+	};
+	static unsigned bus_widths[] = {
+		MMC_BUS_WIDTH_8,
+		MMC_BUS_WIDTH_4,
+	};
+	struct mmc_host *host = card->host;
+	unsigned idx, bus_width = 0;
+	int err = 0;
+
+	if (!mmc_can_ext_csd(card) ||
+	    !(host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)))
+		return 0;
+
+	idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 0 : 1;
+
+	/*
+	 * 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 < ARRAY_SIZE(bus_widths); 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;
+
+		bus_width = bus_widths[idx];
+		mmc_set_bus_width(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) {
+			err = bus_width;
+			break;
+		} else {
+			pr_warn("%s: switch to bus width %d failed\n",
+				mmc_hostname(host), 1 << bus_width);
+		}
+	}
+
+	return err;
+}
+
+/*
+ * Switch to the high-speed mode
+ */
+static int mmc_select_hs(struct mmc_card *card)
+{
+	int err;
+
+	err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+			   EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
+			   card->ext_csd.generic_cmd6_time, MMC_TIMING_MMC_HS,
+			   true, true, true);
+	if (err)
+		pr_warn("%s: switch to high-speed failed, err:%d\n",
+			mmc_hostname(card->host), err);
+
+	return err;
+}
+
+/*
+ * Activate wide bus and DDR if supported.
+ */
+static int mmc_select_hs_ddr(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+	u32 bus_width, ext_csd_bits;
+	int err = 0;
+
+	if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_52))
+		return 0;
+
+	bus_width = host->ios.bus_width;
+	if (bus_width == MMC_BUS_WIDTH_1)
+		return 0;
+
+	ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
+		EXT_CSD_DDR_BUS_WIDTH_8 : EXT_CSD_DDR_BUS_WIDTH_4;
+
+	err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+			   EXT_CSD_BUS_WIDTH,
+			   ext_csd_bits,
+			   card->ext_csd.generic_cmd6_time,
+			   MMC_TIMING_MMC_DDR52,
+			   true, true, true);
+	if (err) {
+		pr_err("%s: switch to bus width %d ddr failed\n",
+			mmc_hostname(host), 1 << bus_width);
+		return err;
+	}
+
+	/*
+	 * 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.
+	 *
+	 * Even (e)MMC card can support 3.3v to 1.2v vccq, but not all
+	 * host controller can support this, like some of the SDHCI
+	 * controller which connect to an eMMC device. Some of these
+	 * host controller still needs to use 1.8v vccq for supporting
+	 * DDR mode.
+	 *
+	 * So the sequence will be:
+	 * if (host and device can both support 1.2v IO)
+	 *	use 1.2v IO;
+	 * else if (host and device can both support 1.8v IO)
+	 *	use 1.8v IO;
+	 * so if host and device can only support 3.3v IO, this is the
+	 * last choice.
+	 *
+	 * WARNING: eMMC rules are NOT the same as SD DDR
+	 */
+	if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_2V) {
+		err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
+		if (!err)
+			return 0;
+	}
+
+	if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_DDR_1_8V &&
+	    host->caps & MMC_CAP_1_8V_DDR)
+		err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
+
+	/* make sure vccq is 3.3v after switching disaster */
+	if (err)
+		err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
+
+	return err;
+}
+
+static int mmc_select_hs400(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+	unsigned int max_dtr;
+	int err = 0;
+	u8 val;
+
+	/*
+	 * HS400 mode requires 8-bit bus width
+	 */
+	if (!(card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
+	      host->ios.bus_width == MMC_BUS_WIDTH_8))
+		return 0;
+
+	/* Switch card to HS mode */
+	val = EXT_CSD_TIMING_HS;
+	err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+			   EXT_CSD_HS_TIMING, val,
+			   card->ext_csd.generic_cmd6_time, 0,
+			   true, false, true);
+	if (err) {
+		pr_err("%s: switch to high-speed from hs200 failed, err:%d\n",
+			mmc_hostname(host), err);
+		return err;
+	}
+
+	/* Set host controller to HS timing */
+	mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
+
+	/* Prepare host to downgrade to HS timing */
+	if (host->ops->hs400_downgrade)
+		host->ops->hs400_downgrade(host);
+
+	/* Reduce frequency to HS frequency */
+	max_dtr = card->ext_csd.hs_max_dtr;
+	mmc_set_clock(host, max_dtr);
+
+	err = mmc_switch_status(card);
+	if (err)
+		goto out_err;
+
+	/* Switch card to DDR */
+	err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+			 EXT_CSD_BUS_WIDTH,
+			 EXT_CSD_DDR_BUS_WIDTH_8,
+			 card->ext_csd.generic_cmd6_time);
+	if (err) {
+		pr_err("%s: switch to bus width for hs400 failed, err:%d\n",
+			mmc_hostname(host), err);
+		return err;
+	}
+
+	/* Switch card to HS400 */
+	val = EXT_CSD_TIMING_HS400 |
+	      card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
+	err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+			   EXT_CSD_HS_TIMING, val,
+			   card->ext_csd.generic_cmd6_time, 0,
+			   true, false, true);
+	if (err) {
+		pr_err("%s: switch to hs400 failed, err:%d\n",
+			 mmc_hostname(host), err);
+		return err;
+	}
+
+	/* Set host controller to HS400 timing and frequency */
+	mmc_set_timing(host, MMC_TIMING_MMC_HS400);
+	mmc_set_bus_speed(card);
+
+	if (host->ops->hs400_complete)
+		host->ops->hs400_complete(host);
+
+	err = mmc_switch_status(card);
+	if (err)
+		goto out_err;
+
+	return 0;
+
+out_err:
+	pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
+	       __func__, err);
+	return err;
+}
+
+int mmc_hs200_to_hs400(struct mmc_card *card)
+{
+	return mmc_select_hs400(card);
+}
+
+int mmc_hs400_to_hs200(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+	unsigned int max_dtr;
+	int err;
+	u8 val;
+
+	/* Reduce frequency to HS */
+	max_dtr = card->ext_csd.hs_max_dtr;
+	mmc_set_clock(host, max_dtr);
+
+	/* Switch HS400 to HS DDR */
+	val = EXT_CSD_TIMING_HS;
+	err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
+			   val, card->ext_csd.generic_cmd6_time, 0,
+			   true, false, true);
+	if (err)
+		goto out_err;
+
+	mmc_set_timing(host, MMC_TIMING_MMC_DDR52);
+
+	err = mmc_switch_status(card);
+	if (err)
+		goto out_err;
+
+	/* Switch HS DDR to HS */
+	err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH,
+			   EXT_CSD_BUS_WIDTH_8, card->ext_csd.generic_cmd6_time,
+			   0, true, false, true);
+	if (err)
+		goto out_err;
+
+	mmc_set_timing(host, MMC_TIMING_MMC_HS);
+
+	if (host->ops->hs400_downgrade)
+		host->ops->hs400_downgrade(host);
+
+	err = mmc_switch_status(card);
+	if (err)
+		goto out_err;
+
+	/* Switch HS to HS200 */
+	val = EXT_CSD_TIMING_HS200 |
+	      card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
+	err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
+			   val, card->ext_csd.generic_cmd6_time, 0,
+			   true, false, true);
+	if (err)
+		goto out_err;
+
+	mmc_set_timing(host, MMC_TIMING_MMC_HS200);
+
+	/*
+	 * For HS200, CRC errors are not a reliable way to know the switch
+	 * failed. If there really is a problem, we would expect tuning will
+	 * fail and the result ends up the same.
+	 */
+	err = __mmc_switch_status(card, false);
+	if (err)
+		goto out_err;
+
+	mmc_set_bus_speed(card);
+
+	/* Prepare tuning for HS400 mode. */
+	if (host->ops->prepare_hs400_tuning)
+		host->ops->prepare_hs400_tuning(host, &host->ios);
+
+	return 0;
+
+out_err:
+	pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
+	       __func__, err);
+	return err;
+}
+
+static void mmc_select_driver_type(struct mmc_card *card)
+{
+	int card_drv_type, drive_strength, drv_type = 0;
+	int fixed_drv_type = card->host->fixed_drv_type;
+
+	card_drv_type = card->ext_csd.raw_driver_strength |
+			mmc_driver_type_mask(0);
+
+	if (fixed_drv_type >= 0)
+		drive_strength = card_drv_type & mmc_driver_type_mask(fixed_drv_type)
+				 ? fixed_drv_type : 0;
+	else
+		drive_strength = mmc_select_drive_strength(card,
+							   card->ext_csd.hs200_max_dtr,
+							   card_drv_type, &drv_type);
+
+	card->drive_strength = drive_strength;
+
+	if (drv_type)
+		mmc_set_driver_type(card->host, drv_type);
+}
+
+static int mmc_select_hs400es(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+	int err = -EINVAL;
+	u8 val;
+
+	if (!(host->caps & MMC_CAP_8_BIT_DATA)) {
+		err = -ENOTSUPP;
+		goto out_err;
+	}
+
+	if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
+		err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
+
+	if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_8V)
+		err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
+
+	/* If fails try again during next card power cycle */
+	if (err)
+		goto out_err;
+
+	err = mmc_select_bus_width(card);
+	if (err != MMC_BUS_WIDTH_8) {
+		pr_err("%s: switch to 8bit bus width failed, err:%d\n",
+			mmc_hostname(host), err);
+		err = err < 0 ? err : -ENOTSUPP;
+		goto out_err;
+	}
+
+	/* Switch card to HS mode */
+	err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+			   EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,
+			   card->ext_csd.generic_cmd6_time, 0,
+			   true, false, true);
+	if (err) {
+		pr_err("%s: switch to hs for hs400es failed, err:%d\n",
+			mmc_hostname(host), err);
+		goto out_err;
+	}
+
+	mmc_set_timing(host, MMC_TIMING_MMC_HS);
+	err = mmc_switch_status(card);
+	if (err)
+		goto out_err;
+
+	mmc_set_clock(host, card->ext_csd.hs_max_dtr);
+
+	/* Switch card to DDR with strobe bit */
+	val = EXT_CSD_DDR_BUS_WIDTH_8 | EXT_CSD_BUS_WIDTH_STROBE;
+	err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+			 EXT_CSD_BUS_WIDTH,
+			 val,
+			 card->ext_csd.generic_cmd6_time);
+	if (err) {
+		pr_err("%s: switch to bus width for hs400es failed, err:%d\n",
+			mmc_hostname(host), err);
+		goto out_err;
+	}
+
+	mmc_select_driver_type(card);
+
+	/* Switch card to HS400 */
+	val = EXT_CSD_TIMING_HS400 |
+	      card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
+	err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+			   EXT_CSD_HS_TIMING, val,
+			   card->ext_csd.generic_cmd6_time, 0,
+			   true, false, true);
+	if (err) {
+		pr_err("%s: switch to hs400es failed, err:%d\n",
+			mmc_hostname(host), err);
+		goto out_err;
+	}
+
+	/* Set host controller to HS400 timing and frequency */
+	mmc_set_timing(host, MMC_TIMING_MMC_HS400);
+
+	/* Controller enable enhanced strobe function */
+	host->ios.enhanced_strobe = true;
+	if (host->ops->hs400_enhanced_strobe)
+		host->ops->hs400_enhanced_strobe(host, &host->ios);
+
+	err = mmc_switch_status(card);
+	if (err)
+		goto out_err;
+
+	return 0;
+
+out_err:
+	pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
+	       __func__, err);
+	return err;
+}
+
+/*
+ * For device supporting HS200 mode, the following sequence
+ * should be done before executing the tuning process.
+ * 1. set the desired bus width(4-bit or 8-bit, 1-bit is not supported)
+ * 2. switch to HS200 mode
+ * 3. set the clock to > 52Mhz and <=200MHz
+ */
+static int mmc_select_hs200(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+	unsigned int old_timing, old_signal_voltage;
+	int err = -EINVAL;
+	u8 val;
+
+	old_signal_voltage = host->ios.signal_voltage;
+	if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_2V)
+		err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
+
+	if (err && card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200_1_8V)
+		err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
+
+	/* If fails try again during next card power cycle */
+	if (err)
+		return err;
+
+	mmc_select_driver_type(card);
+
+	/*
+	 * Set the bus width(4 or 8) with host's support and
+	 * switch to HS200 mode if bus width is set successfully.
+	 */
+	err = mmc_select_bus_width(card);
+	if (err > 0) {
+		val = EXT_CSD_TIMING_HS200 |
+		      card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
+		err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				   EXT_CSD_HS_TIMING, val,
+				   card->ext_csd.generic_cmd6_time, 0,
+				   true, false, true);
+		if (err)
+			goto err;
+		old_timing = host->ios.timing;
+		mmc_set_timing(host, MMC_TIMING_MMC_HS200);
+
+		/*
+		 * For HS200, CRC errors are not a reliable way to know the
+		 * switch failed. If there really is a problem, we would expect
+		 * tuning will fail and the result ends up the same.
+		 */
+		err = __mmc_switch_status(card, false);
+
+		/*
+		 * mmc_select_timing() assumes timing has not changed if
+		 * it is a switch error.
+		 */
+		if (err == -EBADMSG)
+			mmc_set_timing(host, old_timing);
+	}
+err:
+	if (err) {
+		/* fall back to the old signal voltage, if fails report error */
+		if (mmc_set_signal_voltage(host, old_signal_voltage))
+			err = -EIO;
+
+		pr_err("%s: %s failed, error %d\n", mmc_hostname(card->host),
+		       __func__, err);
+	}
+	return err;
+}
+
+/*
+ * Activate High Speed, HS200 or HS400ES mode if supported.
+ */
+static int mmc_select_timing(struct mmc_card *card)
+{
+	int err = 0;
+
+	if (!mmc_can_ext_csd(card))
+		goto bus_speed;
+
+	if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES)
+		err = mmc_select_hs400es(card);
+	else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
+		err = mmc_select_hs200(card);
+	else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
+		err = mmc_select_hs(card);
+
+	if (err && err != -EBADMSG)
+		return err;
+
+bus_speed:
+	/*
+	 * Set the bus speed to the selected bus timing.
+	 * If timing is not selected, backward compatible is the default.
+	 */
+	mmc_set_bus_speed(card);
+	return 0;
+}
+
+/*
+ * Execute tuning sequence to seek the proper bus operating
+ * conditions for HS200 and HS400, which sends CMD21 to the device.
+ */
+static int mmc_hs200_tuning(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+
+	/*
+	 * Timing should be adjusted to the HS400 target
+	 * operation frequency for tuning process
+	 */
+	if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400 &&
+	    host->ios.bus_width == MMC_BUS_WIDTH_8)
+		if (host->ops->prepare_hs400_tuning)
+			host->ops->prepare_hs400_tuning(host, &host->ios);
+
+	return mmc_execute_tuning(card);
+}
+
+/*
+ * 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;
+	u32 cid[4];
+	u32 rocr;
+
+	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);
+
+	/*
+	 * 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.
+	 */
+	err = mmc_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->ocr = ocr;
+		card->type = MMC_TYPE_MMC;
+		card->rca = 1;
+		memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
+	}
+
+	/*
+	 * Call the optional HC's init_card function to handle quirks.
+	 */
+	if (host->ops->init_card)
+		host->ops->init_card(host, card);
+
+	/*
+	 * 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;
+	}
+
+	/*
+	 * handling only for cards supporting DSR and hosts requesting
+	 * DSR configuration
+	 */
+	if (card->csd.dsr_imp && host->dsr_req)
+		mmc_set_dsr(host);
+
+	/*
+	 * 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) {
+		/* Read extended CSD. */
+		err = mmc_read_ext_csd(card);
+		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 (rocr & BIT(30))
+			mmc_card_set_blockaddr(card);
+
+		/* Erase size depends on CSD and Extended CSD */
+		mmc_set_erase_size(card);
+	}
+
+	/* Enable ERASE_GRP_DEF. This bit is lost after a reset or power off. */
+	if (card->ext_csd.rev >= 3) {
+		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;
+	}
+
+	/*
+	 * Enable power_off_notification byte in the ext_csd register
+	 */
+	if (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->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
+	}
+
+	/*
+	 * Select timing interface
+	 */
+	err = mmc_select_timing(card);
+	if (err)
+		goto free_card;
+
+	if (mmc_card_hs200(card)) {
+		err = mmc_hs200_tuning(card);
+		if (err)
+			goto free_card;
+
+		err = mmc_select_hs400(card);
+		if (err)
+			goto free_card;
+	} else if (!mmc_card_hs400es(card)) {
+		/* Select the desired bus width optionally */
+		err = mmc_select_bus_width(card);
+		if (err > 0 && mmc_card_hs(card)) {
+			err = mmc_select_hs_ddr(card);
+			if (err)
+				goto free_card;
+		}
+	}
+
+	/*
+	 * Choose the power class with selected bus interface
+	 */
+	mmc_select_powerclass(card);
+
+	/*
+	 * 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_warn("%s: Enabling HPI failed\n",
+				mmc_hostname(card->host));
+			card->ext_csd.hpi_en = 0;
+			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. Note that some eMMCs from Micron has been
+	 * reported to need ~800 ms timeout, while enabling the cache after
+	 * sudden power failure tests. Let's extend the timeout to a minimum of
+	 * DEFAULT_CACHE_EN_TIMEOUT_MS and do it for all cards.
+	 */
+	if (card->ext_csd.cache_size > 0) {
+		unsigned int timeout_ms = MIN_CACHE_EN_TIMEOUT_MS;
+
+		timeout_ms = max(card->ext_csd.generic_cmd6_time, timeout_ms);
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				EXT_CSD_CACHE_CTRL, 1, timeout_ms);
+		if (err && err != -EBADMSG)
+			goto free_card;
+
+		/*
+		 * Only if no error, cache is turned on successfully.
+		 */
+		if (err) {
+			pr_warn("%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;
+		}
+	}
+
+	/*
+	 * Enable Command Queue if supported. Note that Packed Commands cannot
+	 * be used with Command Queue.
+	 */
+	card->ext_csd.cmdq_en = false;
+	if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) {
+		err = mmc_cmdq_enable(card);
+		if (err && err != -EBADMSG)
+			goto free_card;
+		if (err) {
+			pr_warn("%s: Enabling CMDQ failed\n",
+				mmc_hostname(card->host));
+			card->ext_csd.cmdq_support = false;
+			card->ext_csd.cmdq_depth = 0;
+			err = 0;
+		}
+	}
+	/*
+	 * In some cases (e.g. RPMB or mmc_test), the Command Queue must be
+	 * disabled for a time, so a flag is needed to indicate to re-enable the
+	 * Command Queue.
+	 */
+	card->reenable_cmdq = card->ext_csd.cmdq_en;
+
+	if (card->ext_csd.cmdq_en && !host->cqe_enabled) {
+		err = host->cqe_ops->cqe_enable(host, card);
+		if (err) {
+			pr_err("%s: Failed to enable CQE, error %d\n",
+				mmc_hostname(host), err);
+		} else {
+			host->cqe_enabled = true;
+			pr_info("%s: Command Queue Engine enabled\n",
+				mmc_hostname(host));
+		}
+	}
+
+	if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
+	    host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
+		pr_err("%s: Host failed to negotiate down from 3.3V\n",
+			mmc_hostname(host));
+		err = -EINVAL;
+		goto free_card;
+	}
+
+	if (!oldcard)
+		host->card = card;
+
+	return 0;
+
+free_card:
+	if (!oldcard)
+		mmc_remove_card(card);
+err:
+	return err;
+}
+
+static int mmc_can_sleep(struct mmc_card *card)
+{
+	return (card && card->ext_csd.rev >= 3);
+}
+
+static int mmc_sleep(struct mmc_host *host)
+{
+	struct mmc_command cmd = {};
+	struct mmc_card *card = host->card;
+	unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);
+	int err;
+
+	/* Re-tuning can't be done once the card is deselected */
+	mmc_retune_hold(host);
+
+	err = mmc_deselect_cards(host);
+	if (err)
+		goto out_release;
+
+	cmd.opcode = MMC_SLEEP_AWAKE;
+	cmd.arg = card->rca << 16;
+	cmd.arg |= 1 << 15;
+
+	/*
+	 * If the max_busy_timeout of the host is specified, validate it against
+	 * the sleep cmd timeout. A failure means we need to prevent the host
+	 * from doing hw busy detection, which is done by converting to a R1
+	 * response instead of a R1B. Note, some hosts requires R1B, which also
+	 * means they are on their own when it comes to deal with the busy
+	 * timeout.
+	 */
+	if (!(host->caps & MMC_CAP_NEED_RSP_BUSY) && host->max_busy_timeout &&
+	    (timeout_ms > host->max_busy_timeout)) {
+		cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+	} else {
+		cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
+		cmd.busy_timeout = timeout_ms;
+	}
+
+	err = mmc_wait_for_cmd(host, &cmd, 0);
+	if (err)
+		goto out_release;
+
+	/*
+	 * 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 (!cmd.busy_timeout || !(host->caps & MMC_CAP_WAIT_WHILE_BUSY))
+		mmc_delay(timeout_ms);
+
+out_release:
+	mmc_retune_release(host);
+	return err;
+}
+
+static int mmc_can_poweroff_notify(const struct mmc_card *card)
+{
+	return card &&
+		mmc_card_mmc(card) &&
+		(card->ext_csd.power_off_notification == EXT_CSD_POWER_ON);
+}
+
+static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
+{
+	unsigned int timeout = card->ext_csd.generic_cmd6_time;
+	int err;
+
+	/* Use EXT_CSD_POWER_OFF_SHORT as default notification type. */
+	if (notify_type == EXT_CSD_POWER_OFF_LONG)
+		timeout = card->ext_csd.power_off_longtime;
+
+	err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+			EXT_CSD_POWER_OFF_NOTIFICATION,
+			notify_type, timeout, 0, true, false, false);
+	if (err)
+		pr_err("%s: Power Off Notification timed out, %u\n",
+		       mmc_hostname(card->host), timeout);
+
+	/* Disable the power off notification after the switch operation. */
+	card->ext_csd.power_off_notification = EXT_CSD_NO_POWER_NOTIFICATION;
+
+	return err;
+}
+
+/*
+ * Host is being removed. Free up the current card.
+ */
+static void mmc_remove(struct mmc_host *host)
+{
+	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;
+
+	mmc_get_card(host->card, NULL);
+
+	/*
+	 * Just check if our card has been removed.
+	 */
+	err = _mmc_detect_card_removed(host);
+
+	mmc_put_card(host->card, NULL);
+
+	if (err) {
+		mmc_remove(host);
+
+		mmc_claim_host(host);
+		mmc_detach_bus(host);
+		mmc_power_off(host);
+		mmc_release_host(host);
+	}
+}
+
+static bool _mmc_cache_enabled(struct mmc_host *host)
+{
+	return host->card->ext_csd.cache_size > 0 &&
+	       host->card->ext_csd.cache_ctrl & 1;
+}
+
+static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
+{
+	int err = 0;
+	unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
+					EXT_CSD_POWER_OFF_LONG;
+
+	mmc_claim_host(host);
+
+	if (mmc_card_suspended(host->card))
+		goto out;
+
+	err = mmc_flush_cache(host->card);
+	if (err)
+		goto out;
+
+	if (mmc_can_poweroff_notify(host->card) &&
+		((host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) || !is_suspend))
+		err = mmc_poweroff_notify(host->card, notify_type);
+	else if (mmc_can_sleep(host->card))
+		err = mmc_sleep(host);
+	else if (!mmc_host_is_spi(host))
+		err = mmc_deselect_cards(host);
+
+	if (!err) {
+		mmc_power_off(host);
+		mmc_card_set_suspended(host->card);
+	}
+out:
+	mmc_release_host(host);
+	return err;
+}
+
+/*
+ * Suspend callback
+ */
+static int mmc_suspend(struct mmc_host *host)
+{
+	int err;
+
+	err = _mmc_suspend(host, true);
+	if (!err) {
+		pm_runtime_disable(&host->card->dev);
+		pm_runtime_set_suspended(&host->card->dev);
+	}
+
+	return err;
+}
+
+/*
+ * 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 = 0;
+
+	mmc_claim_host(host);
+
+	if (!mmc_card_suspended(host->card))
+		goto out;
+
+	mmc_power_up(host, host->card->ocr);
+	err = mmc_init_card(host, host->card->ocr, host->card);
+	mmc_card_clr_suspended(host->card);
+
+out:
+	mmc_release_host(host);
+	return err;
+}
+
+/*
+ * Shutdown callback
+ */
+static int mmc_shutdown(struct mmc_host *host)
+{
+	int err = 0;
+
+	/*
+	 * In a specific case for poweroff notify, we need to resume the card
+	 * before we can shutdown it properly.
+	 */
+	if (mmc_can_poweroff_notify(host->card) &&
+		!(host->caps2 & MMC_CAP2_FULL_PWR_CYCLE))
+		err = _mmc_resume(host);
+
+	if (!err)
+		err = _mmc_suspend(host, false);
+
+	return err;
+}
+
+/*
+ * Callback for resume.
+ */
+static int mmc_resume(struct mmc_host *host)
+{
+	pm_runtime_enable(&host->card->dev);
+	return 0;
+}
+
+/*
+ * Callback for runtime_suspend.
+ */
+static int mmc_runtime_suspend(struct mmc_host *host)
+{
+	int err;
+
+	if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
+		return 0;
+
+	err = _mmc_suspend(host, true);
+	if (err)
+		pr_err("%s: error %d doing aggressive suspend\n",
+			mmc_hostname(host), err);
+
+	return err;
+}
+
+/*
+ * Callback for runtime_resume.
+ */
+static int mmc_runtime_resume(struct mmc_host *host)
+{
+	int err;
+
+	err = _mmc_resume(host);
+	if (err && err != -ENOMEDIUM)
+		pr_err("%s: error %d doing runtime resume\n",
+			mmc_hostname(host), err);
+
+	return 0;
+}
+
+static int mmc_can_reset(struct mmc_card *card)
+{
+	u8 rst_n_function;
+
+	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;
+}
+
+static int _mmc_hw_reset(struct mmc_host *host)
+{
+	struct mmc_card *card = host->card;
+
+	/*
+	 * In the case of recovery, we can't expect flushing the cache to work
+	 * always, but we have a go and ignore errors.
+	 */
+	mmc_flush_cache(host->card);
+
+	if ((host->caps & MMC_CAP_HW_RESET) && host->ops->hw_reset &&
+	     mmc_can_reset(card)) {
+		/* If the card accept RST_n signal, send it. */
+		mmc_set_clock(host, host->f_init);
+		host->ops->hw_reset(host);
+		/* Set initial state and call mmc_set_ios */
+		mmc_set_initial_state(host);
+	} else {
+		/* Do a brute force power cycle */
+		mmc_power_cycle(host, card->ocr);
+		mmc_pwrseq_reset(host);
+	}
+	return mmc_init_card(host, card->ocr, card);
+}
+
+static const struct mmc_bus_ops mmc_ops = {
+	.remove = mmc_remove,
+	.detect = mmc_detect,
+	.suspend = mmc_suspend,
+	.resume = mmc_resume,
+	.runtime_suspend = mmc_runtime_suspend,
+	.runtime_resume = mmc_runtime_resume,
+	.alive = mmc_alive,
+	.shutdown = mmc_shutdown,
+	.hw_reset = _mmc_hw_reset,
+	.cache_enabled = _mmc_cache_enabled,
+};
+
+/*
+ * Starting point for MMC card init.
+ */
+int mmc_attach_mmc(struct mmc_host *host)
+{
+	int err;
+	u32 ocr, rocr;
+
+	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(host, &mmc_ops);
+	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;
+	}
+
+	rocr = mmc_select_voltage(host, ocr);
+
+	/*
+	 * Can we support the voltage of the card?
+	 */
+	if (!rocr) {
+		err = -EINVAL;
+		goto err;
+	}
+
+	/*
+	 * Detect and init the card.
+	 */
+	err = mmc_init_card(host, rocr, NULL);
+	if (err)
+		goto err;
+
+	mmc_release_host(host);
+	err = mmc_add_card(host->card);
+	if (err)
+		goto remove_card;
+
+	mmc_claim_host(host);
+	return 0;
+
+remove_card:
+	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/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
new file mode 100644
index 000000000..c2187fc6d
--- /dev/null
+++ b/drivers/mmc/core/mmc_ops.c
@@ -0,0 +1,1005 @@
+/*
+ *  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 "card.h"
+#include "host.h"
+#include "mmc_ops.h"
+
+#define MMC_OPS_TIMEOUT_MS		(10 * 60 * 1000) /* 10min*/
+#define MMC_BKOPS_TIMEOUT_MS		(120 * 1000) /* 120s */
+#define MMC_CACHE_FLUSH_TIMEOUT_MS	(30 * 1000) /* 30s */
+
+static const u8 tuning_blk_pattern_4bit[] = {
+	0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc,
+	0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef,
+	0xff, 0xdf, 0xff, 0xdd, 0xff, 0xfb, 0xff, 0xfb,
+	0xbf, 0xff, 0x7f, 0xff, 0x77, 0xf7, 0xbd, 0xef,
+	0xff, 0xf0, 0xff, 0xf0, 0x0f, 0xfc, 0xcc, 0x3c,
+	0xcc, 0x33, 0xcc, 0xcf, 0xff, 0xef, 0xff, 0xee,
+	0xff, 0xfd, 0xff, 0xfd, 0xdf, 0xff, 0xbf, 0xff,
+	0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde,
+};
+
+static const u8 tuning_blk_pattern_8bit[] = {
+	0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00,
+	0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc,
+	0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff,
+	0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff,
+	0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd,
+	0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb,
+	0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff,
+	0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff,
+	0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00,
+	0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc,
+	0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff,
+	0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee,
+	0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd,
+	0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff,
+	0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff,
+	0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee,
+};
+
+int __mmc_send_status(struct mmc_card *card, u32 *status, unsigned int retries)
+{
+	int err;
+	struct mmc_command cmd = {};
+
+	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, 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;
+}
+EXPORT_SYMBOL_GPL(__mmc_send_status);
+
+int mmc_send_status(struct mmc_card *card, u32 *status)
+{
+	return __mmc_send_status(card, status, MMC_CMD_RETRIES);
+}
+EXPORT_SYMBOL_GPL(mmc_send_status);
+
+static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
+{
+	struct mmc_command cmd = {};
+
+	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;
+	}
+
+	return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
+}
+
+int mmc_select_card(struct mmc_card *card)
+{
+
+	return _mmc_select_card(card->host, card);
+}
+
+int mmc_deselect_cards(struct mmc_host *host)
+{
+	return _mmc_select_card(host, NULL);
+}
+
+/*
+ * Write the value specified in the device tree or board code into the optional
+ * 16 bit Driver Stage Register. This can be used to tune raise/fall times and
+ * drive strength of the DAT and CMD outputs. The actual meaning of a given
+ * value is hardware dependant.
+ * The presence of the DSR register can be determined from the CSD register,
+ * bit 76.
+ */
+int mmc_set_dsr(struct mmc_host *host)
+{
+	struct mmc_command cmd = {};
+
+	cmd.opcode = MMC_SET_DSR;
+
+	cmd.arg = (host->dsr << 16) | 0xffff;
+	cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
+
+	return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
+}
+
+int mmc_go_idle(struct mmc_host *host)
+{
+	int err;
+	struct mmc_command cmd = {};
+
+	/*
+	 * 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 = {};
+	int i, err = 0;
+
+	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_set_relative_addr(struct mmc_card *card)
+{
+	struct mmc_command cmd = {};
+
+	cmd.opcode = MMC_SET_RELATIVE_ADDR;
+	cmd.arg = card->rca << 16;
+	cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+	return mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
+}
+
+static int
+mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)
+{
+	int err;
+	struct mmc_command cmd = {};
+
+	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;
+}
+
+/*
+ * NOTE: void *buf, caller for the buf is required to use DMA-capable
+ * buffer or on-stack buffer (with some overhead in callee).
+ */
+static int
+mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
+		u32 opcode, void *buf, unsigned len)
+{
+	struct mmc_request mrq = {};
+	struct mmc_command cmd = {};
+	struct mmc_data data = {};
+	struct scatterlist sg;
+
+	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, 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);
+
+	if (cmd.error)
+		return cmd.error;
+	if (data.error)
+		return data.error;
+
+	return 0;
+}
+
+static int mmc_spi_send_csd(struct mmc_card *card, u32 *csd)
+{
+	int ret, i;
+	__be32 *csd_tmp;
+
+	csd_tmp = kzalloc(16, GFP_KERNEL);
+	if (!csd_tmp)
+		return -ENOMEM;
+
+	ret = mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd_tmp, 16);
+	if (ret)
+		goto err;
+
+	for (i = 0; i < 4; i++)
+		csd[i] = be32_to_cpu(csd_tmp[i]);
+
+err:
+	kfree(csd_tmp);
+	return ret;
+}
+
+int mmc_send_csd(struct mmc_card *card, u32 *csd)
+{
+	if (mmc_host_is_spi(card->host))
+		return mmc_spi_send_csd(card, csd);
+
+	return mmc_send_cxd_native(card->host, card->rca << 16,	csd,
+				MMC_SEND_CSD);
+}
+
+static int mmc_spi_send_cid(struct mmc_host *host, u32 *cid)
+{
+	int ret, i;
+	__be32 *cid_tmp;
+
+	cid_tmp = kzalloc(16, GFP_KERNEL);
+	if (!cid_tmp)
+		return -ENOMEM;
+
+	ret = mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid_tmp, 16);
+	if (ret)
+		goto err;
+
+	for (i = 0; i < 4; i++)
+		cid[i] = be32_to_cpu(cid_tmp[i]);
+
+err:
+	kfree(cid_tmp);
+	return ret;
+}
+
+int mmc_send_cid(struct mmc_host *host, u32 *cid)
+{
+	if (mmc_host_is_spi(host))
+		return mmc_spi_send_cid(host, cid);
+
+	return mmc_send_cxd_native(host, 0, cid, MMC_ALL_SEND_CID);
+}
+
+int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
+{
+	int err;
+	u8 *ext_csd;
+
+	if (!card || !new_ext_csd)
+		return -EINVAL;
+
+	if (!mmc_can_ext_csd(card))
+		return -EOPNOTSUPP;
+
+	/*
+	 * As the ext_csd is so large and mostly unused, we don't store the
+	 * raw block in mmc_card.
+	 */
+	ext_csd = kzalloc(512, GFP_KERNEL);
+	if (!ext_csd)
+		return -ENOMEM;
+
+	err = mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD, ext_csd,
+				512);
+	if (err)
+		kfree(ext_csd);
+	else
+		*new_ext_csd = ext_csd;
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(mmc_get_ext_csd);
+
+int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp)
+{
+	struct mmc_command cmd = {};
+	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 = {};
+	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;
+}
+
+static int mmc_switch_status_error(struct mmc_host *host, u32 status)
+{
+	if (mmc_host_is_spi(host)) {
+		if (status & R1_SPI_ILLEGAL_COMMAND)
+			return -EBADMSG;
+	} else {
+		if (R1_STATUS(status))
+			pr_warn("%s: unexpected status %#x after switch\n",
+				mmc_hostname(host), status);
+		if (status & R1_SWITCH_ERROR)
+			return -EBADMSG;
+	}
+	return 0;
+}
+
+/* Caller must hold re-tuning */
+int __mmc_switch_status(struct mmc_card *card, bool crc_err_fatal)
+{
+	u32 status;
+	int err;
+
+	err = mmc_send_status(card, &status);
+	if (!crc_err_fatal && err == -EILSEQ)
+		return 0;
+	if (err)
+		return err;
+
+	return mmc_switch_status_error(card->host, status);
+}
+
+int mmc_switch_status(struct mmc_card *card)
+{
+	return __mmc_switch_status(card, true);
+}
+
+static int mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
+			bool send_status, bool retry_crc_err)
+{
+	struct mmc_host *host = card->host;
+	int err;
+	unsigned long timeout;
+	u32 status = 0;
+	bool expired = false;
+	bool busy = false;
+
+	/*
+	 * In cases when not allowed to poll by using CMD13 or because we aren't
+	 * capable of polling by using ->card_busy(), then rely on waiting the
+	 * stated timeout to be sufficient.
+	 */
+	if (!send_status && !host->ops->card_busy) {
+		mmc_delay(timeout_ms);
+		return 0;
+	}
+
+	timeout = jiffies + msecs_to_jiffies(timeout_ms) + 1;
+	do {
+		/*
+		 * Due to the possibility of being preempted while polling,
+		 * check the expiration time first.
+		 */
+		expired = time_after(jiffies, timeout);
+
+		if (host->ops->card_busy) {
+			busy = host->ops->card_busy(host);
+		} else {
+			err = mmc_send_status(card, &status);
+			if (retry_crc_err && err == -EILSEQ) {
+				busy = true;
+			} else if (err) {
+				return err;
+			} else {
+				err = mmc_switch_status_error(host, status);
+				if (err)
+					return err;
+				busy = R1_CURRENT_STATE(status) == R1_STATE_PRG;
+			}
+		}
+
+		/* Timeout if the device still remains busy. */
+		if (expired && busy) {
+			pr_err("%s: Card stuck being busy! %s\n",
+				mmc_hostname(host), __func__);
+			return -ETIMEDOUT;
+		}
+	} while (busy);
+
+	return 0;
+}
+
+/**
+ *	__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
+ *	@timing: new timing to change to
+ *	@use_busy_signal: use the busy signal as response type
+ *	@send_status: send status cmd to poll for busy
+ *	@retry_crc_err: retry when CRC errors when polling with CMD13 for busy
+ *
+ *	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, unsigned char timing,
+		bool use_busy_signal, bool send_status,	bool retry_crc_err)
+{
+	struct mmc_host *host = card->host;
+	int err;
+	struct mmc_command cmd = {};
+	bool use_r1b_resp = use_busy_signal;
+	unsigned char old_timing = host->ios.timing;
+
+	mmc_retune_hold(host);
+
+	if (!timeout_ms) {
+		pr_warn("%s: unspecified timeout for CMD6 - use generic\n",
+			mmc_hostname(host));
+		timeout_ms = card->ext_csd.generic_cmd6_time;
+	}
+
+	/*
+	 * If the cmd timeout and the max_busy_timeout of the host are both
+	 * specified, let's validate them. A failure means we need to prevent
+	 * the host from doing hw busy detection, which is done by converting
+	 * to a R1 response instead of a R1B. Note, some hosts requires R1B,
+	 * which also means they are on their own when it comes to deal with the
+	 * busy timeout.
+	 */
+	if (!(host->caps & MMC_CAP_NEED_RSP_BUSY) &&
+	    host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
+		use_r1b_resp = false;
+
+	cmd.opcode = MMC_SWITCH;
+	cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
+		  (index << 16) |
+		  (value << 8) |
+		  set;
+	cmd.flags = MMC_CMD_AC;
+	if (use_r1b_resp) {
+		cmd.flags |= MMC_RSP_SPI_R1B | MMC_RSP_R1B;
+		cmd.busy_timeout = timeout_ms;
+	} else {
+		cmd.flags |= MMC_RSP_SPI_R1 | MMC_RSP_R1;
+	}
+
+	if (index == EXT_CSD_SANITIZE_START)
+		cmd.sanitize_busy = true;
+
+	err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
+	if (err)
+		goto out;
+
+	/* No need to check card status in case of unblocking command */
+	if (!use_busy_signal)
+		goto out;
+
+	/*If SPI or used HW busy detection above, then we don't need to poll. */
+	if (((host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) ||
+		mmc_host_is_spi(host))
+		goto out_tim;
+
+	/* Let's try to poll to find out when the command is completed. */
+	err = mmc_poll_for_busy(card, timeout_ms, send_status, retry_crc_err);
+	if (err)
+		goto out;
+
+out_tim:
+	/* Switch to new timing before check switch status. */
+	if (timing)
+		mmc_set_timing(host, timing);
+
+	if (send_status) {
+		err = mmc_switch_status(card);
+		if (err && timing)
+			mmc_set_timing(host, old_timing);
+	}
+out:
+	mmc_retune_release(host);
+
+	return err;
+}
+
+int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
+		unsigned int timeout_ms)
+{
+	return __mmc_switch(card, set, index, value, timeout_ms, 0,
+			true, true, false);
+}
+EXPORT_SYMBOL_GPL(mmc_switch);
+
+int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error)
+{
+	struct mmc_request mrq = {};
+	struct mmc_command cmd = {};
+	struct mmc_data data = {};
+	struct scatterlist sg;
+	struct mmc_ios *ios = &host->ios;
+	const u8 *tuning_block_pattern;
+	int size, err = 0;
+	u8 *data_buf;
+
+	if (ios->bus_width == MMC_BUS_WIDTH_8) {
+		tuning_block_pattern = tuning_blk_pattern_8bit;
+		size = sizeof(tuning_blk_pattern_8bit);
+	} else if (ios->bus_width == MMC_BUS_WIDTH_4) {
+		tuning_block_pattern = tuning_blk_pattern_4bit;
+		size = sizeof(tuning_blk_pattern_4bit);
+	} else
+		return -EINVAL;
+
+	data_buf = kzalloc(size, GFP_KERNEL);
+	if (!data_buf)
+		return -ENOMEM;
+
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+
+	cmd.opcode = opcode;
+	cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+
+	data.blksz = size;
+	data.blocks = 1;
+	data.flags = MMC_DATA_READ;
+
+	/*
+	 * According to the tuning specs, Tuning process
+	 * is normally shorter 40 executions of CMD19,
+	 * and timeout value should be shorter than 150 ms
+	 */
+	data.timeout_ns = 150 * NSEC_PER_MSEC;
+
+	data.sg = &sg;
+	data.sg_len = 1;
+	sg_init_one(&sg, data_buf, size);
+
+	mmc_wait_for_req(host, &mrq);
+
+	if (cmd_error)
+		*cmd_error = cmd.error;
+
+	if (cmd.error) {
+		err = cmd.error;
+		goto out;
+	}
+
+	if (data.error) {
+		err = data.error;
+		goto out;
+	}
+
+	if (memcmp(data_buf, tuning_block_pattern, size))
+		err = -EIO;
+
+out:
+	kfree(data_buf);
+	return err;
+}
+EXPORT_SYMBOL_GPL(mmc_send_tuning);
+
+int mmc_abort_tuning(struct mmc_host *host, u32 opcode)
+{
+	struct mmc_command cmd = {};
+
+	/*
+	 * eMMC specification specifies that CMD12 can be used to stop a tuning
+	 * command, but SD specification does not, so do nothing unless it is
+	 * eMMC.
+	 */
+	if (opcode != MMC_SEND_TUNING_BLOCK_HS200)
+		return 0;
+
+	cmd.opcode = MMC_STOP_TRANSMISSION;
+	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
+
+	/*
+	 * For drivers that override R1 to R1b, set an arbitrary timeout based
+	 * on the tuning timeout i.e. 150ms.
+	 */
+	cmd.busy_timeout = 150;
+
+	return mmc_wait_for_cmd(host, &cmd, 0);
+}
+EXPORT_SYMBOL_GPL(mmc_abort_tuning);
+
+static int
+mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,
+		  u8 len)
+{
+	struct mmc_request mrq = {};
+	struct mmc_command cmd = {};
+	struct mmc_data data = {};
+	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;
+	mmc_set_data_timeout(&data, card);
+	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 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);
+	return mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width);
+}
+
+static int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status)
+{
+	struct mmc_command cmd = {};
+	unsigned int opcode;
+	int err;
+
+	if (!card->ext_csd.hpi) {
+		pr_warn("%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;
+
+	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;
+}
+
+/**
+ *	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
+ *	until out-of prg-state.
+ */
+int mmc_interrupt_hpi(struct mmc_card *card)
+{
+	int err;
+	u32 status;
+	unsigned long prg_wait;
+
+	if (!card->ext_csd.hpi_en) {
+		pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host));
+		return 1;
+	}
+
+	err = mmc_send_status(card, &status);
+	if (err) {
+		pr_err("%s: Get card status fail\n", mmc_hostname(card->host));
+		goto out;
+	}
+
+	switch (R1_CURRENT_STATE(status)) {
+	case R1_STATE_IDLE:
+	case R1_STATE_READY:
+	case R1_STATE_STBY:
+	case R1_STATE_TRAN:
+		/*
+		 * In idle and transfer states, HPI is not needed and the caller
+		 * can issue the next intended command immediately
+		 */
+		goto out;
+	case R1_STATE_PRG:
+		break;
+	default:
+		/* In all other states, it's illegal to issue HPI */
+		pr_debug("%s: HPI cannot be sent. Card state=%d\n",
+			mmc_hostname(card->host), R1_CURRENT_STATE(status));
+		err = -EINVAL;
+		goto out;
+	}
+
+	err = mmc_send_hpi_cmd(card, &status);
+	if (err)
+		goto out;
+
+	prg_wait = jiffies + msecs_to_jiffies(card->ext_csd.out_of_int_time);
+	do {
+		err = mmc_send_status(card, &status);
+
+		if (!err && R1_CURRENT_STATE(status) == R1_STATE_TRAN)
+			break;
+		if (time_after(jiffies, prg_wait))
+			err = -ETIMEDOUT;
+	} while (!err);
+
+out:
+	return err;
+}
+
+int mmc_can_ext_csd(struct mmc_card *card)
+{
+	return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3);
+}
+
+static int mmc_read_bkops_status(struct mmc_card *card)
+{
+	int err;
+	u8 *ext_csd;
+
+	err = mmc_get_ext_csd(card, &ext_csd);
+	if (err)
+		return err;
+
+	card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS];
+	card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS];
+	kfree(ext_csd);
+	return 0;
+}
+
+/**
+ *	mmc_run_bkops - Run BKOPS for supported cards
+ *	@card: MMC card to run BKOPS for
+ *
+ *	Run background operations synchronously for cards having manual BKOPS
+ *	enabled and in case it reports urgent BKOPS level.
+*/
+void mmc_run_bkops(struct mmc_card *card)
+{
+	int err;
+
+	if (!card->ext_csd.man_bkops_en)
+		return;
+
+	err = mmc_read_bkops_status(card);
+	if (err) {
+		pr_err("%s: Failed to read bkops status: %d\n",
+		       mmc_hostname(card->host), err);
+		return;
+	}
+
+	if (!card->ext_csd.raw_bkops_status ||
+	    card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2)
+		return;
+
+	mmc_retune_hold(card->host);
+
+	/*
+	 * For urgent BKOPS status, LEVEL_2 and higher, let's execute
+	 * synchronously. Future wise, we may consider to start BKOPS, for less
+	 * urgent levels by using an asynchronous background task, when idle.
+	 */
+	err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+			 EXT_CSD_BKOPS_START, 1, MMC_BKOPS_TIMEOUT_MS);
+	if (err)
+		pr_warn("%s: Error %d starting bkops\n",
+			mmc_hostname(card->host), err);
+
+	mmc_retune_release(card->host);
+}
+EXPORT_SYMBOL(mmc_run_bkops);
+
+/*
+ * Flush the cache to the non-volatile storage.
+ */
+int mmc_flush_cache(struct mmc_card *card)
+{
+	int err = 0;
+
+	if (mmc_cache_enabled(card->host)) {
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 EXT_CSD_FLUSH_CACHE, 1,
+				 MMC_CACHE_FLUSH_TIMEOUT_MS);
+		if (err)
+			pr_err("%s: cache flush error %d\n",
+					mmc_hostname(card->host), err);
+	}
+
+	return err;
+}
+EXPORT_SYMBOL(mmc_flush_cache);
+
+static int mmc_cmdq_switch(struct mmc_card *card, bool enable)
+{
+	u8 val = enable ? EXT_CSD_CMDQ_MODE_ENABLED : 0;
+	int err;
+
+	if (!card->ext_csd.cmdq_support)
+		return -EOPNOTSUPP;
+
+	err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_CMDQ_MODE_EN,
+			 val, card->ext_csd.generic_cmd6_time);
+	if (!err)
+		card->ext_csd.cmdq_en = enable;
+
+	return err;
+}
+
+int mmc_cmdq_enable(struct mmc_card *card)
+{
+	return mmc_cmdq_switch(card, true);
+}
+EXPORT_SYMBOL_GPL(mmc_cmdq_enable);
+
+int mmc_cmdq_disable(struct mmc_card *card)
+{
+	return mmc_cmdq_switch(card, false);
+}
+EXPORT_SYMBOL_GPL(mmc_cmdq_disable);
diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h
new file mode 100644
index 000000000..018a5e3f6
--- /dev/null
+++ b/drivers/mmc/core/mmc_ops.h
@@ -0,0 +1,49 @@
+/*
+ *  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
+
+#include <linux/types.h>
+
+struct mmc_host;
+struct mmc_card;
+
+int mmc_select_card(struct mmc_card *card);
+int mmc_deselect_cards(struct mmc_host *host);
+int mmc_set_dsr(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_set_relative_addr(struct mmc_card *card);
+int mmc_send_csd(struct mmc_card *card, u32 *csd);
+int __mmc_send_status(struct mmc_card *card, u32 *status, unsigned int retries);
+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_bus_test(struct mmc_card *card, u8 bus_width);
+int mmc_interrupt_hpi(struct mmc_card *card);
+int mmc_can_ext_csd(struct mmc_card *card);
+int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd);
+int mmc_switch_status(struct mmc_card *card);
+int __mmc_switch_status(struct mmc_card *card, bool crc_err_fatal);
+int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
+		unsigned int timeout_ms, unsigned char timing,
+		bool use_busy_signal, bool send_status,	bool retry_crc_err);
+int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
+		unsigned int timeout_ms);
+void mmc_run_bkops(struct mmc_card *card);
+int mmc_flush_cache(struct mmc_card *card);
+int mmc_cmdq_enable(struct mmc_card *card);
+int mmc_cmdq_disable(struct mmc_card *card);
+
+#endif
+
diff --git a/drivers/mmc/core/mmc_test.c b/drivers/mmc/core/mmc_test.c
new file mode 100644
index 000000000..ef18daeaa
--- /dev/null
+++ b/drivers/mmc/core/mmc_test.c
@@ -0,0 +1,3296 @@
+/*
+ *  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/mmc/core.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/slab.h>
+
+#include <linux/scatterlist.h>
+#include <linux/swap.h>		/* For nr_free_buffer_pages() */
+#include <linux/list.h>
+
+#include <linux/debugfs.h>
+#include <linux/uaccess.h>
+#include <linux/seq_file.h>
+#include <linux/module.h>
+
+#include "core.h"
+#include "card.h"
+#include "host.h"
+#include "bus.h"
+#include "mmc_ops.h"
+
+#define RESULT_OK		0
+#define RESULT_FAIL		1
+#define RESULT_UNSUP_HOST	2
+#define RESULT_UNSUP_CARD	3
+
+#define BUFFER_ORDER		2
+#define BUFFER_SIZE		(PAGE_SIZE << BUFFER_ORDER)
+
+#define TEST_ALIGN_END		8
+
+/*
+ * Limit the test area size to the maximum MMC HC erase group size.  Note that
+ * the maximum SD allocation unit size is just 4MiB.
+ */
+#define TEST_AREA_MAX_SIZE (128 * 1024 * 1024)
+
+/**
+ * struct mmc_test_pages - pages allocated by 'alloc_pages()'.
+ * @page: first page in the allocation
+ * @order: order of the number of pages allocated
+ */
+struct mmc_test_pages {
+	struct page *page;
+	unsigned int order;
+};
+
+/**
+ * struct mmc_test_mem - allocated memory.
+ * @arr: array of allocations
+ * @cnt: number of allocations
+ */
+struct mmc_test_mem {
+	struct mmc_test_pages *arr;
+	unsigned int cnt;
+};
+
+/**
+ * struct mmc_test_area - information for performance tests.
+ * @max_sz: test area size (in bytes)
+ * @dev_addr: address on card at which to do performance tests
+ * @max_tfr: maximum transfer size allowed by driver (in bytes)
+ * @max_segs: maximum segments allowed by driver in scatterlist @sg
+ * @max_seg_sz: maximum segment size allowed by driver
+ * @blocks: number of (512 byte) blocks currently mapped by @sg
+ * @sg_len: length of currently mapped scatterlist @sg
+ * @mem: allocated memory
+ * @sg: scatterlist
+ */
+struct mmc_test_area {
+	unsigned long max_sz;
+	unsigned int dev_addr;
+	unsigned int max_tfr;
+	unsigned int max_segs;
+	unsigned int max_seg_sz;
+	unsigned int blocks;
+	unsigned int sg_len;
+	struct mmc_test_mem *mem;
+	struct scatterlist *sg;
+};
+
+/**
+ * struct mmc_test_transfer_result - transfer results for performance tests.
+ * @link: double-linked list
+ * @count: amount of group of sectors to check
+ * @sectors: amount of sectors to check in one group
+ * @ts: time values of transfer
+ * @rate: calculated transfer rate
+ * @iops: I/O operations per second (times 100)
+ */
+struct mmc_test_transfer_result {
+	struct list_head link;
+	unsigned int count;
+	unsigned int sectors;
+	struct timespec64 ts;
+	unsigned int rate;
+	unsigned int iops;
+};
+
+/**
+ * struct mmc_test_general_result - results for tests.
+ * @link: double-linked list
+ * @card: card under test
+ * @testcase: number of test case
+ * @result: result of test run
+ * @tr_lst: transfer measurements if any as mmc_test_transfer_result
+ */
+struct mmc_test_general_result {
+	struct list_head link;
+	struct mmc_card *card;
+	int testcase;
+	int result;
+	struct list_head tr_lst;
+};
+
+/**
+ * struct mmc_test_dbgfs_file - debugfs related file.
+ * @link: double-linked list
+ * @card: card under test
+ * @file: file created under debugfs
+ */
+struct mmc_test_dbgfs_file {
+	struct list_head link;
+	struct mmc_card *card;
+	struct dentry *file;
+};
+
+/**
+ * struct mmc_test_card - test information.
+ * @card: card under test
+ * @scratch: transfer buffer
+ * @buffer: transfer buffer
+ * @highmem: buffer for highmem tests
+ * @area: information for performance tests
+ * @gr: pointer to results of current testcase
+ */
+struct mmc_test_card {
+	struct mmc_card	*card;
+
+	u8		scratch[BUFFER_SIZE];
+	u8		*buffer;
+#ifdef CONFIG_HIGHMEM
+	struct page	*highmem;
+#endif
+	struct mmc_test_area		area;
+	struct mmc_test_general_result	*gr;
+};
+
+enum mmc_test_prep_media {
+	MMC_TEST_PREP_NONE = 0,
+	MMC_TEST_PREP_WRITE_FULL = 1 << 0,
+	MMC_TEST_PREP_ERASE = 1 << 1,
+};
+
+struct mmc_test_multiple_rw {
+	unsigned int *sg_len;
+	unsigned int *bs;
+	unsigned int len;
+	unsigned int size;
+	bool do_write;
+	bool do_nonblock_req;
+	enum mmc_test_prep_media prepare;
+};
+
+/*******************************************************************/
+/*  General helper functions                                       */
+/*******************************************************************/
+
+/*
+ * Configure correct block size in card
+ */
+static int mmc_test_set_blksize(struct mmc_test_card *test, unsigned size)
+{
+	return mmc_set_blocklen(test->card, size);
+}
+
+static bool mmc_test_card_cmd23(struct mmc_card *card)
+{
+	return mmc_card_mmc(card) ||
+	       (mmc_card_sd(card) && card->scr.cmds & SD_SCR_CMD23_SUPPORT);
+}
+
+static void mmc_test_prepare_sbc(struct mmc_test_card *test,
+				 struct mmc_request *mrq, unsigned int blocks)
+{
+	struct mmc_card *card = test->card;
+
+	if (!mrq->sbc || !mmc_host_cmd23(card->host) ||
+	    !mmc_test_card_cmd23(card) || !mmc_op_multi(mrq->cmd->opcode) ||
+	    (card->quirks & MMC_QUIRK_BLK_NO_CMD23)) {
+		mrq->sbc = NULL;
+		return;
+	}
+
+	mrq->sbc->opcode = MMC_SET_BLOCK_COUNT;
+	mrq->sbc->arg = blocks;
+	mrq->sbc->flags = MMC_RSP_R1 | MMC_CMD_AC;
+}
+
+/*
+ * Fill in the mmc_request structure given a set of transfer parameters.
+ */
+static void mmc_test_prepare_mrq(struct mmc_test_card *test,
+	struct mmc_request *mrq, struct scatterlist *sg, unsigned sg_len,
+	unsigned dev_addr, unsigned blocks, unsigned blksz, int write)
+{
+	if (WARN_ON(!mrq || !mrq->cmd || !mrq->data || !mrq->stop))
+		return;
+
+	if (blocks > 1) {
+		mrq->cmd->opcode = write ?
+			MMC_WRITE_MULTIPLE_BLOCK : MMC_READ_MULTIPLE_BLOCK;
+	} else {
+		mrq->cmd->opcode = write ?
+			MMC_WRITE_BLOCK : MMC_READ_SINGLE_BLOCK;
+	}
+
+	mrq->cmd->arg = dev_addr;
+	if (!mmc_card_blockaddr(test->card))
+		mrq->cmd->arg <<= 9;
+
+	mrq->cmd->flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+
+	if (blocks == 1)
+		mrq->stop = NULL;
+	else {
+		mrq->stop->opcode = MMC_STOP_TRANSMISSION;
+		mrq->stop->arg = 0;
+		mrq->stop->flags = MMC_RSP_R1B | MMC_CMD_AC;
+	}
+
+	mrq->data->blksz = blksz;
+	mrq->data->blocks = blocks;
+	mrq->data->flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
+	mrq->data->sg = sg;
+	mrq->data->sg_len = sg_len;
+
+	mmc_test_prepare_sbc(test, mrq, blocks);
+
+	mmc_set_data_timeout(mrq->data, test->card);
+}
+
+static int mmc_test_busy(struct mmc_command *cmd)
+{
+	return !(cmd->resp[0] & R1_READY_FOR_DATA) ||
+		(R1_CURRENT_STATE(cmd->resp[0]) == R1_STATE_PRG);
+}
+
+/*
+ * Wait for the card to finish the busy state
+ */
+static int mmc_test_wait_busy(struct mmc_test_card *test)
+{
+	int ret, busy;
+	struct mmc_command cmd = {};
+
+	busy = 0;
+	do {
+		memset(&cmd, 0, sizeof(struct mmc_command));
+
+		cmd.opcode = MMC_SEND_STATUS;
+		cmd.arg = test->card->rca << 16;
+		cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+		ret = mmc_wait_for_cmd(test->card->host, &cmd, 0);
+		if (ret)
+			break;
+
+		if (!busy && mmc_test_busy(&cmd)) {
+			busy = 1;
+			if (test->card->host->caps & MMC_CAP_WAIT_WHILE_BUSY)
+				pr_info("%s: Warning: Host did not wait for busy state to end.\n",
+					mmc_hostname(test->card->host));
+		}
+	} while (mmc_test_busy(&cmd));
+
+	return ret;
+}
+
+/*
+ * Transfer a single sector of kernel addressable data
+ */
+static int mmc_test_buffer_transfer(struct mmc_test_card *test,
+	u8 *buffer, unsigned addr, unsigned blksz, int write)
+{
+	struct mmc_request mrq = {};
+	struct mmc_command cmd = {};
+	struct mmc_command stop = {};
+	struct mmc_data data = {};
+
+	struct scatterlist sg;
+
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+	mrq.stop = &stop;
+
+	sg_init_one(&sg, buffer, blksz);
+
+	mmc_test_prepare_mrq(test, &mrq, &sg, 1, addr, 1, blksz, write);
+
+	mmc_wait_for_req(test->card->host, &mrq);
+
+	if (cmd.error)
+		return cmd.error;
+	if (data.error)
+		return data.error;
+
+	return mmc_test_wait_busy(test);
+}
+
+static void mmc_test_free_mem(struct mmc_test_mem *mem)
+{
+	if (!mem)
+		return;
+	while (mem->cnt--)
+		__free_pages(mem->arr[mem->cnt].page,
+			     mem->arr[mem->cnt].order);
+	kfree(mem->arr);
+	kfree(mem);
+}
+
+/*
+ * Allocate a lot of memory, preferably max_sz but at least min_sz.  In case
+ * there isn't much memory do not exceed 1/16th total lowmem pages.  Also do
+ * not exceed a maximum number of segments and try not to make segments much
+ * bigger than maximum segment size.
+ */
+static struct mmc_test_mem *mmc_test_alloc_mem(unsigned long min_sz,
+					       unsigned long max_sz,
+					       unsigned int max_segs,
+					       unsigned int max_seg_sz)
+{
+	unsigned long max_page_cnt = DIV_ROUND_UP(max_sz, PAGE_SIZE);
+	unsigned long min_page_cnt = DIV_ROUND_UP(min_sz, PAGE_SIZE);
+	unsigned long max_seg_page_cnt = DIV_ROUND_UP(max_seg_sz, PAGE_SIZE);
+	unsigned long page_cnt = 0;
+	unsigned long limit = nr_free_buffer_pages() >> 4;
+	struct mmc_test_mem *mem;
+
+	if (max_page_cnt > limit)
+		max_page_cnt = limit;
+	if (min_page_cnt > max_page_cnt)
+		min_page_cnt = max_page_cnt;
+
+	if (max_seg_page_cnt > max_page_cnt)
+		max_seg_page_cnt = max_page_cnt;
+
+	if (max_segs > max_page_cnt)
+		max_segs = max_page_cnt;
+
+	mem = kzalloc(sizeof(*mem), GFP_KERNEL);
+	if (!mem)
+		return NULL;
+
+	mem->arr = kcalloc(max_segs, sizeof(*mem->arr), GFP_KERNEL);
+	if (!mem->arr)
+		goto out_free;
+
+	while (max_page_cnt) {
+		struct page *page;
+		unsigned int order;
+		gfp_t flags = GFP_KERNEL | GFP_DMA | __GFP_NOWARN |
+				__GFP_NORETRY;
+
+		order = get_order(max_seg_page_cnt << PAGE_SHIFT);
+		while (1) {
+			page = alloc_pages(flags, order);
+			if (page || !order)
+				break;
+			order -= 1;
+		}
+		if (!page) {
+			if (page_cnt < min_page_cnt)
+				goto out_free;
+			break;
+		}
+		mem->arr[mem->cnt].page = page;
+		mem->arr[mem->cnt].order = order;
+		mem->cnt += 1;
+		if (max_page_cnt <= (1UL << order))
+			break;
+		max_page_cnt -= 1UL << order;
+		page_cnt += 1UL << order;
+		if (mem->cnt >= max_segs) {
+			if (page_cnt < min_page_cnt)
+				goto out_free;
+			break;
+		}
+	}
+
+	return mem;
+
+out_free:
+	mmc_test_free_mem(mem);
+	return NULL;
+}
+
+/*
+ * Map memory into a scatterlist.  Optionally allow the same memory to be
+ * mapped more than once.
+ */
+static int mmc_test_map_sg(struct mmc_test_mem *mem, unsigned long size,
+			   struct scatterlist *sglist, int repeat,
+			   unsigned int max_segs, unsigned int max_seg_sz,
+			   unsigned int *sg_len, int min_sg_len)
+{
+	struct scatterlist *sg = NULL;
+	unsigned int i;
+	unsigned long sz = size;
+
+	sg_init_table(sglist, max_segs);
+	if (min_sg_len > max_segs)
+		min_sg_len = max_segs;
+
+	*sg_len = 0;
+	do {
+		for (i = 0; i < mem->cnt; i++) {
+			unsigned long len = PAGE_SIZE << mem->arr[i].order;
+
+			if (min_sg_len && (size / min_sg_len < len))
+				len = ALIGN(size / min_sg_len, 512);
+			if (len > sz)
+				len = sz;
+			if (len > max_seg_sz)
+				len = max_seg_sz;
+			if (sg)
+				sg = sg_next(sg);
+			else
+				sg = sglist;
+			if (!sg)
+				return -EINVAL;
+			sg_set_page(sg, mem->arr[i].page, len, 0);
+			sz -= len;
+			*sg_len += 1;
+			if (!sz)
+				break;
+		}
+	} while (sz && repeat);
+
+	if (sz)
+		return -EINVAL;
+
+	if (sg)
+		sg_mark_end(sg);
+
+	return 0;
+}
+
+/*
+ * Map memory into a scatterlist so that no pages are contiguous.  Allow the
+ * same memory to be mapped more than once.
+ */
+static int mmc_test_map_sg_max_scatter(struct mmc_test_mem *mem,
+				       unsigned long sz,
+				       struct scatterlist *sglist,
+				       unsigned int max_segs,
+				       unsigned int max_seg_sz,
+				       unsigned int *sg_len)
+{
+	struct scatterlist *sg = NULL;
+	unsigned int i = mem->cnt, cnt;
+	unsigned long len;
+	void *base, *addr, *last_addr = NULL;
+
+	sg_init_table(sglist, max_segs);
+
+	*sg_len = 0;
+	while (sz) {
+		base = page_address(mem->arr[--i].page);
+		cnt = 1 << mem->arr[i].order;
+		while (sz && cnt) {
+			addr = base + PAGE_SIZE * --cnt;
+			if (last_addr && last_addr + PAGE_SIZE == addr)
+				continue;
+			last_addr = addr;
+			len = PAGE_SIZE;
+			if (len > max_seg_sz)
+				len = max_seg_sz;
+			if (len > sz)
+				len = sz;
+			if (sg)
+				sg = sg_next(sg);
+			else
+				sg = sglist;
+			if (!sg)
+				return -EINVAL;
+			sg_set_page(sg, virt_to_page(addr), len, 0);
+			sz -= len;
+			*sg_len += 1;
+		}
+		if (i == 0)
+			i = mem->cnt;
+	}
+
+	if (sg)
+		sg_mark_end(sg);
+
+	return 0;
+}
+
+/*
+ * Calculate transfer rate in bytes per second.
+ */
+static unsigned int mmc_test_rate(uint64_t bytes, struct timespec64 *ts)
+{
+	uint64_t ns;
+
+	ns = timespec64_to_ns(ts);
+	bytes *= 1000000000;
+
+	while (ns > UINT_MAX) {
+		bytes >>= 1;
+		ns >>= 1;
+	}
+
+	if (!ns)
+		return 0;
+
+	do_div(bytes, (uint32_t)ns);
+
+	return bytes;
+}
+
+/*
+ * Save transfer results for future usage
+ */
+static void mmc_test_save_transfer_result(struct mmc_test_card *test,
+	unsigned int count, unsigned int sectors, struct timespec64 ts,
+	unsigned int rate, unsigned int iops)
+{
+	struct mmc_test_transfer_result *tr;
+
+	if (!test->gr)
+		return;
+
+	tr = kmalloc(sizeof(*tr), GFP_KERNEL);
+	if (!tr)
+		return;
+
+	tr->count = count;
+	tr->sectors = sectors;
+	tr->ts = ts;
+	tr->rate = rate;
+	tr->iops = iops;
+
+	list_add_tail(&tr->link, &test->gr->tr_lst);
+}
+
+/*
+ * Print the transfer rate.
+ */
+static void mmc_test_print_rate(struct mmc_test_card *test, uint64_t bytes,
+				struct timespec64 *ts1, struct timespec64 *ts2)
+{
+	unsigned int rate, iops, sectors = bytes >> 9;
+	struct timespec64 ts;
+
+	ts = timespec64_sub(*ts2, *ts1);
+
+	rate = mmc_test_rate(bytes, &ts);
+	iops = mmc_test_rate(100, &ts); /* I/O ops per sec x 100 */
+
+	pr_info("%s: Transfer of %u sectors (%u%s KiB) took %llu.%09u "
+			 "seconds (%u kB/s, %u KiB/s, %u.%02u IOPS)\n",
+			 mmc_hostname(test->card->host), sectors, sectors >> 1,
+			 (sectors & 1 ? ".5" : ""), (u64)ts.tv_sec,
+			 (u32)ts.tv_nsec, rate / 1000, rate / 1024,
+			 iops / 100, iops % 100);
+
+	mmc_test_save_transfer_result(test, 1, sectors, ts, rate, iops);
+}
+
+/*
+ * Print the average transfer rate.
+ */
+static void mmc_test_print_avg_rate(struct mmc_test_card *test, uint64_t bytes,
+				    unsigned int count, struct timespec64 *ts1,
+				    struct timespec64 *ts2)
+{
+	unsigned int rate, iops, sectors = bytes >> 9;
+	uint64_t tot = bytes * count;
+	struct timespec64 ts;
+
+	ts = timespec64_sub(*ts2, *ts1);
+
+	rate = mmc_test_rate(tot, &ts);
+	iops = mmc_test_rate(count * 100, &ts); /* I/O ops per sec x 100 */
+
+	pr_info("%s: Transfer of %u x %u sectors (%u x %u%s KiB) took "
+			 "%llu.%09u seconds (%u kB/s, %u KiB/s, "
+			 "%u.%02u IOPS, sg_len %d)\n",
+			 mmc_hostname(test->card->host), count, sectors, count,
+			 sectors >> 1, (sectors & 1 ? ".5" : ""),
+			 (u64)ts.tv_sec, (u32)ts.tv_nsec,
+			 rate / 1000, rate / 1024, iops / 100, iops % 100,
+			 test->area.sg_len);
+
+	mmc_test_save_transfer_result(test, count, sectors, ts, rate, iops);
+}
+
+/*
+ * Return the card size in sectors.
+ */
+static unsigned int mmc_test_capacity(struct mmc_card *card)
+{
+	if (!mmc_card_sd(card) && mmc_card_blockaddr(card))
+		return card->ext_csd.sectors;
+	else
+		return card->csd.capacity << (card->csd.read_blkbits - 9);
+}
+
+/*******************************************************************/
+/*  Test preparation and cleanup                                   */
+/*******************************************************************/
+
+/*
+ * Fill the first couple of sectors of the card with known data
+ * so that bad reads/writes can be detected
+ */
+static int __mmc_test_prepare(struct mmc_test_card *test, int write)
+{
+	int ret, i;
+
+	ret = mmc_test_set_blksize(test, 512);
+	if (ret)
+		return ret;
+
+	if (write)
+		memset(test->buffer, 0xDF, 512);
+	else {
+		for (i = 0; i < 512; i++)
+			test->buffer[i] = i;
+	}
+
+	for (i = 0; i < BUFFER_SIZE / 512; i++) {
+		ret = mmc_test_buffer_transfer(test, test->buffer, i, 512, 1);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int mmc_test_prepare_write(struct mmc_test_card *test)
+{
+	return __mmc_test_prepare(test, 1);
+}
+
+static int mmc_test_prepare_read(struct mmc_test_card *test)
+{
+	return __mmc_test_prepare(test, 0);
+}
+
+static int mmc_test_cleanup(struct mmc_test_card *test)
+{
+	int ret, i;
+
+	ret = mmc_test_set_blksize(test, 512);
+	if (ret)
+		return ret;
+
+	memset(test->buffer, 0, 512);
+
+	for (i = 0; i < BUFFER_SIZE / 512; i++) {
+		ret = mmc_test_buffer_transfer(test, test->buffer, i, 512, 1);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+/*******************************************************************/
+/*  Test execution helpers                                         */
+/*******************************************************************/
+
+/*
+ * Modifies the mmc_request to perform the "short transfer" tests
+ */
+static void mmc_test_prepare_broken_mrq(struct mmc_test_card *test,
+	struct mmc_request *mrq, int write)
+{
+	if (WARN_ON(!mrq || !mrq->cmd || !mrq->data))
+		return;
+
+	if (mrq->data->blocks > 1) {
+		mrq->cmd->opcode = write ?
+			MMC_WRITE_BLOCK : MMC_READ_SINGLE_BLOCK;
+		mrq->stop = NULL;
+	} else {
+		mrq->cmd->opcode = MMC_SEND_STATUS;
+		mrq->cmd->arg = test->card->rca << 16;
+	}
+}
+
+/*
+ * Checks that a normal transfer didn't have any errors
+ */
+static int mmc_test_check_result(struct mmc_test_card *test,
+				 struct mmc_request *mrq)
+{
+	int ret;
+
+	if (WARN_ON(!mrq || !mrq->cmd || !mrq->data))
+		return -EINVAL;
+
+	ret = 0;
+
+	if (mrq->sbc && mrq->sbc->error)
+		ret = mrq->sbc->error;
+	if (!ret && mrq->cmd->error)
+		ret = mrq->cmd->error;
+	if (!ret && mrq->data->error)
+		ret = mrq->data->error;
+	if (!ret && mrq->stop && mrq->stop->error)
+		ret = mrq->stop->error;
+	if (!ret && mrq->data->bytes_xfered !=
+		mrq->data->blocks * mrq->data->blksz)
+		ret = RESULT_FAIL;
+
+	if (ret == -EINVAL)
+		ret = RESULT_UNSUP_HOST;
+
+	return ret;
+}
+
+/*
+ * Checks that a "short transfer" behaved as expected
+ */
+static int mmc_test_check_broken_result(struct mmc_test_card *test,
+	struct mmc_request *mrq)
+{
+	int ret;
+
+	if (WARN_ON(!mrq || !mrq->cmd || !mrq->data))
+		return -EINVAL;
+
+	ret = 0;
+
+	if (!ret && mrq->cmd->error)
+		ret = mrq->cmd->error;
+	if (!ret && mrq->data->error == 0)
+		ret = RESULT_FAIL;
+	if (!ret && mrq->data->error != -ETIMEDOUT)
+		ret = mrq->data->error;
+	if (!ret && mrq->stop && mrq->stop->error)
+		ret = mrq->stop->error;
+	if (mrq->data->blocks > 1) {
+		if (!ret && mrq->data->bytes_xfered > mrq->data->blksz)
+			ret = RESULT_FAIL;
+	} else {
+		if (!ret && mrq->data->bytes_xfered > 0)
+			ret = RESULT_FAIL;
+	}
+
+	if (ret == -EINVAL)
+		ret = RESULT_UNSUP_HOST;
+
+	return ret;
+}
+
+struct mmc_test_req {
+	struct mmc_request mrq;
+	struct mmc_command sbc;
+	struct mmc_command cmd;
+	struct mmc_command stop;
+	struct mmc_command status;
+	struct mmc_data data;
+};
+
+/*
+ * Tests nonblock transfer with certain parameters
+ */
+static void mmc_test_req_reset(struct mmc_test_req *rq)
+{
+	memset(rq, 0, sizeof(struct mmc_test_req));
+
+	rq->mrq.cmd = &rq->cmd;
+	rq->mrq.data = &rq->data;
+	rq->mrq.stop = &rq->stop;
+}
+
+static struct mmc_test_req *mmc_test_req_alloc(void)
+{
+	struct mmc_test_req *rq = kmalloc(sizeof(*rq), GFP_KERNEL);
+
+	if (rq)
+		mmc_test_req_reset(rq);
+
+	return rq;
+}
+
+static void mmc_test_wait_done(struct mmc_request *mrq)
+{
+	complete(&mrq->completion);
+}
+
+static int mmc_test_start_areq(struct mmc_test_card *test,
+			       struct mmc_request *mrq,
+			       struct mmc_request *prev_mrq)
+{
+	struct mmc_host *host = test->card->host;
+	int err = 0;
+
+	if (mrq) {
+		init_completion(&mrq->completion);
+		mrq->done = mmc_test_wait_done;
+		mmc_pre_req(host, mrq);
+	}
+
+	if (prev_mrq) {
+		wait_for_completion(&prev_mrq->completion);
+		err = mmc_test_wait_busy(test);
+		if (!err)
+			err = mmc_test_check_result(test, prev_mrq);
+	}
+
+	if (!err && mrq) {
+		err = mmc_start_request(host, mrq);
+		if (err)
+			mmc_retune_release(host);
+	}
+
+	if (prev_mrq)
+		mmc_post_req(host, prev_mrq, 0);
+
+	if (err && mrq)
+		mmc_post_req(host, mrq, err);
+
+	return err;
+}
+
+static int mmc_test_nonblock_transfer(struct mmc_test_card *test,
+				      struct scatterlist *sg, unsigned sg_len,
+				      unsigned dev_addr, unsigned blocks,
+				      unsigned blksz, int write, int count)
+{
+	struct mmc_test_req *rq1, *rq2;
+	struct mmc_request *mrq, *prev_mrq;
+	int i;
+	int ret = RESULT_OK;
+
+	rq1 = mmc_test_req_alloc();
+	rq2 = mmc_test_req_alloc();
+	if (!rq1 || !rq2) {
+		ret = RESULT_FAIL;
+		goto err;
+	}
+
+	mrq = &rq1->mrq;
+	prev_mrq = NULL;
+
+	for (i = 0; i < count; i++) {
+		mmc_test_req_reset(container_of(mrq, struct mmc_test_req, mrq));
+		mmc_test_prepare_mrq(test, mrq, sg, sg_len, dev_addr, blocks,
+				     blksz, write);
+		ret = mmc_test_start_areq(test, mrq, prev_mrq);
+		if (ret)
+			goto err;
+
+		if (!prev_mrq)
+			prev_mrq = &rq2->mrq;
+
+		swap(mrq, prev_mrq);
+		dev_addr += blocks;
+	}
+
+	ret = mmc_test_start_areq(test, NULL, prev_mrq);
+err:
+	kfree(rq1);
+	kfree(rq2);
+	return ret;
+}
+
+/*
+ * Tests a basic transfer with certain parameters
+ */
+static int mmc_test_simple_transfer(struct mmc_test_card *test,
+	struct scatterlist *sg, unsigned sg_len, unsigned dev_addr,
+	unsigned blocks, unsigned blksz, int write)
+{
+	struct mmc_request mrq = {};
+	struct mmc_command cmd = {};
+	struct mmc_command stop = {};
+	struct mmc_data data = {};
+
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+	mrq.stop = &stop;
+
+	mmc_test_prepare_mrq(test, &mrq, sg, sg_len, dev_addr,
+		blocks, blksz, write);
+
+	mmc_wait_for_req(test->card->host, &mrq);
+
+	mmc_test_wait_busy(test);
+
+	return mmc_test_check_result(test, &mrq);
+}
+
+/*
+ * Tests a transfer where the card will fail completely or partly
+ */
+static int mmc_test_broken_transfer(struct mmc_test_card *test,
+	unsigned blocks, unsigned blksz, int write)
+{
+	struct mmc_request mrq = {};
+	struct mmc_command cmd = {};
+	struct mmc_command stop = {};
+	struct mmc_data data = {};
+
+	struct scatterlist sg;
+
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+	mrq.stop = &stop;
+
+	sg_init_one(&sg, test->buffer, blocks * blksz);
+
+	mmc_test_prepare_mrq(test, &mrq, &sg, 1, 0, blocks, blksz, write);
+	mmc_test_prepare_broken_mrq(test, &mrq, write);
+
+	mmc_wait_for_req(test->card->host, &mrq);
+
+	mmc_test_wait_busy(test);
+
+	return mmc_test_check_broken_result(test, &mrq);
+}
+
+/*
+ * Does a complete transfer test where data is also validated
+ *
+ * Note: mmc_test_prepare() must have been done before this call
+ */
+static int mmc_test_transfer(struct mmc_test_card *test,
+	struct scatterlist *sg, unsigned sg_len, unsigned dev_addr,
+	unsigned blocks, unsigned blksz, int write)
+{
+	int ret, i;
+	unsigned long flags;
+
+	if (write) {
+		for (i = 0; i < blocks * blksz; i++)
+			test->scratch[i] = i;
+	} else {
+		memset(test->scratch, 0, BUFFER_SIZE);
+	}
+	local_irq_save(flags);
+	sg_copy_from_buffer(sg, sg_len, test->scratch, BUFFER_SIZE);
+	local_irq_restore(flags);
+
+	ret = mmc_test_set_blksize(test, blksz);
+	if (ret)
+		return ret;
+
+	ret = mmc_test_simple_transfer(test, sg, sg_len, dev_addr,
+		blocks, blksz, write);
+	if (ret)
+		return ret;
+
+	if (write) {
+		int sectors;
+
+		ret = mmc_test_set_blksize(test, 512);
+		if (ret)
+			return ret;
+
+		sectors = (blocks * blksz + 511) / 512;
+		if ((sectors * 512) == (blocks * blksz))
+			sectors++;
+
+		if ((sectors * 512) > BUFFER_SIZE)
+			return -EINVAL;
+
+		memset(test->buffer, 0, sectors * 512);
+
+		for (i = 0; i < sectors; i++) {
+			ret = mmc_test_buffer_transfer(test,
+				test->buffer + i * 512,
+				dev_addr + i, 512, 0);
+			if (ret)
+				return ret;
+		}
+
+		for (i = 0; i < blocks * blksz; i++) {
+			if (test->buffer[i] != (u8)i)
+				return RESULT_FAIL;
+		}
+
+		for (; i < sectors * 512; i++) {
+			if (test->buffer[i] != 0xDF)
+				return RESULT_FAIL;
+		}
+	} else {
+		local_irq_save(flags);
+		sg_copy_to_buffer(sg, sg_len, test->scratch, BUFFER_SIZE);
+		local_irq_restore(flags);
+		for (i = 0; i < blocks * blksz; i++) {
+			if (test->scratch[i] != (u8)i)
+				return RESULT_FAIL;
+		}
+	}
+
+	return 0;
+}
+
+/*******************************************************************/
+/*  Tests                                                          */
+/*******************************************************************/
+
+struct mmc_test_case {
+	const char *name;
+
+	int (*prepare)(struct mmc_test_card *);
+	int (*run)(struct mmc_test_card *);
+	int (*cleanup)(struct mmc_test_card *);
+};
+
+static int mmc_test_basic_write(struct mmc_test_card *test)
+{
+	int ret;
+	struct scatterlist sg;
+
+	ret = mmc_test_set_blksize(test, 512);
+	if (ret)
+		return ret;
+
+	sg_init_one(&sg, test->buffer, 512);
+
+	return mmc_test_simple_transfer(test, &sg, 1, 0, 1, 512, 1);
+}
+
+static int mmc_test_basic_read(struct mmc_test_card *test)
+{
+	int ret;
+	struct scatterlist sg;
+
+	ret = mmc_test_set_blksize(test, 512);
+	if (ret)
+		return ret;
+
+	sg_init_one(&sg, test->buffer, 512);
+
+	return mmc_test_simple_transfer(test, &sg, 1, 0, 1, 512, 0);
+}
+
+static int mmc_test_verify_write(struct mmc_test_card *test)
+{
+	struct scatterlist sg;
+
+	sg_init_one(&sg, test->buffer, 512);
+
+	return mmc_test_transfer(test, &sg, 1, 0, 1, 512, 1);
+}
+
+static int mmc_test_verify_read(struct mmc_test_card *test)
+{
+	struct scatterlist sg;
+
+	sg_init_one(&sg, test->buffer, 512);
+
+	return mmc_test_transfer(test, &sg, 1, 0, 1, 512, 0);
+}
+
+static int mmc_test_multi_write(struct mmc_test_card *test)
+{
+	unsigned int size;
+	struct scatterlist sg;
+
+	if (test->card->host->max_blk_count == 1)
+		return RESULT_UNSUP_HOST;
+
+	size = PAGE_SIZE * 2;
+	size = min(size, test->card->host->max_req_size);
+	size = min(size, test->card->host->max_seg_size);
+	size = min(size, test->card->host->max_blk_count * 512);
+
+	if (size < 1024)
+		return RESULT_UNSUP_HOST;
+
+	sg_init_one(&sg, test->buffer, size);
+
+	return mmc_test_transfer(test, &sg, 1, 0, size / 512, 512, 1);
+}
+
+static int mmc_test_multi_read(struct mmc_test_card *test)
+{
+	unsigned int size;
+	struct scatterlist sg;
+
+	if (test->card->host->max_blk_count == 1)
+		return RESULT_UNSUP_HOST;
+
+	size = PAGE_SIZE * 2;
+	size = min(size, test->card->host->max_req_size);
+	size = min(size, test->card->host->max_seg_size);
+	size = min(size, test->card->host->max_blk_count * 512);
+
+	if (size < 1024)
+		return RESULT_UNSUP_HOST;
+
+	sg_init_one(&sg, test->buffer, size);
+
+	return mmc_test_transfer(test, &sg, 1, 0, size / 512, 512, 0);
+}
+
+static int mmc_test_pow2_write(struct mmc_test_card *test)
+{
+	int ret, i;
+	struct scatterlist sg;
+
+	if (!test->card->csd.write_partial)
+		return RESULT_UNSUP_CARD;
+
+	for (i = 1; i < 512; i <<= 1) {
+		sg_init_one(&sg, test->buffer, i);
+		ret = mmc_test_transfer(test, &sg, 1, 0, 1, i, 1);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int mmc_test_pow2_read(struct mmc_test_card *test)
+{
+	int ret, i;
+	struct scatterlist sg;
+
+	if (!test->card->csd.read_partial)
+		return RESULT_UNSUP_CARD;
+
+	for (i = 1; i < 512; i <<= 1) {
+		sg_init_one(&sg, test->buffer, i);
+		ret = mmc_test_transfer(test, &sg, 1, 0, 1, i, 0);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int mmc_test_weird_write(struct mmc_test_card *test)
+{
+	int ret, i;
+	struct scatterlist sg;
+
+	if (!test->card->csd.write_partial)
+		return RESULT_UNSUP_CARD;
+
+	for (i = 3; i < 512; i += 7) {
+		sg_init_one(&sg, test->buffer, i);
+		ret = mmc_test_transfer(test, &sg, 1, 0, 1, i, 1);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int mmc_test_weird_read(struct mmc_test_card *test)
+{
+	int ret, i;
+	struct scatterlist sg;
+
+	if (!test->card->csd.read_partial)
+		return RESULT_UNSUP_CARD;
+
+	for (i = 3; i < 512; i += 7) {
+		sg_init_one(&sg, test->buffer, i);
+		ret = mmc_test_transfer(test, &sg, 1, 0, 1, i, 0);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int mmc_test_align_write(struct mmc_test_card *test)
+{
+	int ret, i;
+	struct scatterlist sg;
+
+	for (i = 1; i < TEST_ALIGN_END; i++) {
+		sg_init_one(&sg, test->buffer + i, 512);
+		ret = mmc_test_transfer(test, &sg, 1, 0, 1, 512, 1);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int mmc_test_align_read(struct mmc_test_card *test)
+{
+	int ret, i;
+	struct scatterlist sg;
+
+	for (i = 1; i < TEST_ALIGN_END; i++) {
+		sg_init_one(&sg, test->buffer + i, 512);
+		ret = mmc_test_transfer(test, &sg, 1, 0, 1, 512, 0);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int mmc_test_align_multi_write(struct mmc_test_card *test)
+{
+	int ret, i;
+	unsigned int size;
+	struct scatterlist sg;
+
+	if (test->card->host->max_blk_count == 1)
+		return RESULT_UNSUP_HOST;
+
+	size = PAGE_SIZE * 2;
+	size = min(size, test->card->host->max_req_size);
+	size = min(size, test->card->host->max_seg_size);
+	size = min(size, test->card->host->max_blk_count * 512);
+
+	if (size < 1024)
+		return RESULT_UNSUP_HOST;
+
+	for (i = 1; i < TEST_ALIGN_END; i++) {
+		sg_init_one(&sg, test->buffer + i, size);
+		ret = mmc_test_transfer(test, &sg, 1, 0, size / 512, 512, 1);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int mmc_test_align_multi_read(struct mmc_test_card *test)
+{
+	int ret, i;
+	unsigned int size;
+	struct scatterlist sg;
+
+	if (test->card->host->max_blk_count == 1)
+		return RESULT_UNSUP_HOST;
+
+	size = PAGE_SIZE * 2;
+	size = min(size, test->card->host->max_req_size);
+	size = min(size, test->card->host->max_seg_size);
+	size = min(size, test->card->host->max_blk_count * 512);
+
+	if (size < 1024)
+		return RESULT_UNSUP_HOST;
+
+	for (i = 1; i < TEST_ALIGN_END; i++) {
+		sg_init_one(&sg, test->buffer + i, size);
+		ret = mmc_test_transfer(test, &sg, 1, 0, size / 512, 512, 0);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int mmc_test_xfersize_write(struct mmc_test_card *test)
+{
+	int ret;
+
+	ret = mmc_test_set_blksize(test, 512);
+	if (ret)
+		return ret;
+
+	return mmc_test_broken_transfer(test, 1, 512, 1);
+}
+
+static int mmc_test_xfersize_read(struct mmc_test_card *test)
+{
+	int ret;
+
+	ret = mmc_test_set_blksize(test, 512);
+	if (ret)
+		return ret;
+
+	return mmc_test_broken_transfer(test, 1, 512, 0);
+}
+
+static int mmc_test_multi_xfersize_write(struct mmc_test_card *test)
+{
+	int ret;
+
+	if (test->card->host->max_blk_count == 1)
+		return RESULT_UNSUP_HOST;
+
+	ret = mmc_test_set_blksize(test, 512);
+	if (ret)
+		return ret;
+
+	return mmc_test_broken_transfer(test, 2, 512, 1);
+}
+
+static int mmc_test_multi_xfersize_read(struct mmc_test_card *test)
+{
+	int ret;
+
+	if (test->card->host->max_blk_count == 1)
+		return RESULT_UNSUP_HOST;
+
+	ret = mmc_test_set_blksize(test, 512);
+	if (ret)
+		return ret;
+
+	return mmc_test_broken_transfer(test, 2, 512, 0);
+}
+
+#ifdef CONFIG_HIGHMEM
+
+static int mmc_test_write_high(struct mmc_test_card *test)
+{
+	struct scatterlist sg;
+
+	sg_init_table(&sg, 1);
+	sg_set_page(&sg, test->highmem, 512, 0);
+
+	return mmc_test_transfer(test, &sg, 1, 0, 1, 512, 1);
+}
+
+static int mmc_test_read_high(struct mmc_test_card *test)
+{
+	struct scatterlist sg;
+
+	sg_init_table(&sg, 1);
+	sg_set_page(&sg, test->highmem, 512, 0);
+
+	return mmc_test_transfer(test, &sg, 1, 0, 1, 512, 0);
+}
+
+static int mmc_test_multi_write_high(struct mmc_test_card *test)
+{
+	unsigned int size;
+	struct scatterlist sg;
+
+	if (test->card->host->max_blk_count == 1)
+		return RESULT_UNSUP_HOST;
+
+	size = PAGE_SIZE * 2;
+	size = min(size, test->card->host->max_req_size);
+	size = min(size, test->card->host->max_seg_size);
+	size = min(size, test->card->host->max_blk_count * 512);
+
+	if (size < 1024)
+		return RESULT_UNSUP_HOST;
+
+	sg_init_table(&sg, 1);
+	sg_set_page(&sg, test->highmem, size, 0);
+
+	return mmc_test_transfer(test, &sg, 1, 0, size / 512, 512, 1);
+}
+
+static int mmc_test_multi_read_high(struct mmc_test_card *test)
+{
+	unsigned int size;
+	struct scatterlist sg;
+
+	if (test->card->host->max_blk_count == 1)
+		return RESULT_UNSUP_HOST;
+
+	size = PAGE_SIZE * 2;
+	size = min(size, test->card->host->max_req_size);
+	size = min(size, test->card->host->max_seg_size);
+	size = min(size, test->card->host->max_blk_count * 512);
+
+	if (size < 1024)
+		return RESULT_UNSUP_HOST;
+
+	sg_init_table(&sg, 1);
+	sg_set_page(&sg, test->highmem, size, 0);
+
+	return mmc_test_transfer(test, &sg, 1, 0, size / 512, 512, 0);
+}
+
+#else
+
+static int mmc_test_no_highmem(struct mmc_test_card *test)
+{
+	pr_info("%s: Highmem not configured - test skipped\n",
+	       mmc_hostname(test->card->host));
+	return 0;
+}
+
+#endif /* CONFIG_HIGHMEM */
+
+/*
+ * Map sz bytes so that it can be transferred.
+ */
+static int mmc_test_area_map(struct mmc_test_card *test, unsigned long sz,
+			     int max_scatter, int min_sg_len)
+{
+	struct mmc_test_area *t = &test->area;
+	int err;
+
+	t->blocks = sz >> 9;
+
+	if (max_scatter) {
+		err = mmc_test_map_sg_max_scatter(t->mem, sz, t->sg,
+						  t->max_segs, t->max_seg_sz,
+				       &t->sg_len);
+	} else {
+		err = mmc_test_map_sg(t->mem, sz, t->sg, 1, t->max_segs,
+				      t->max_seg_sz, &t->sg_len, min_sg_len);
+	}
+	if (err)
+		pr_info("%s: Failed to map sg list\n",
+		       mmc_hostname(test->card->host));
+	return err;
+}
+
+/*
+ * Transfer bytes mapped by mmc_test_area_map().
+ */
+static int mmc_test_area_transfer(struct mmc_test_card *test,
+				  unsigned int dev_addr, int write)
+{
+	struct mmc_test_area *t = &test->area;
+
+	return mmc_test_simple_transfer(test, t->sg, t->sg_len, dev_addr,
+					t->blocks, 512, write);
+}
+
+/*
+ * Map and transfer bytes for multiple transfers.
+ */
+static int mmc_test_area_io_seq(struct mmc_test_card *test, unsigned long sz,
+				unsigned int dev_addr, int write,
+				int max_scatter, int timed, int count,
+				bool nonblock, int min_sg_len)
+{
+	struct timespec64 ts1, ts2;
+	int ret = 0;
+	int i;
+	struct mmc_test_area *t = &test->area;
+
+	/*
+	 * In the case of a maximally scattered transfer, the maximum transfer
+	 * size is further limited by using PAGE_SIZE segments.
+	 */
+	if (max_scatter) {
+		struct mmc_test_area *t = &test->area;
+		unsigned long max_tfr;
+
+		if (t->max_seg_sz >= PAGE_SIZE)
+			max_tfr = t->max_segs * PAGE_SIZE;
+		else
+			max_tfr = t->max_segs * t->max_seg_sz;
+		if (sz > max_tfr)
+			sz = max_tfr;
+	}
+
+	ret = mmc_test_area_map(test, sz, max_scatter, min_sg_len);
+	if (ret)
+		return ret;
+
+	if (timed)
+		ktime_get_ts64(&ts1);
+	if (nonblock)
+		ret = mmc_test_nonblock_transfer(test, t->sg, t->sg_len,
+				 dev_addr, t->blocks, 512, write, count);
+	else
+		for (i = 0; i < count && ret == 0; i++) {
+			ret = mmc_test_area_transfer(test, dev_addr, write);
+			dev_addr += sz >> 9;
+		}
+
+	if (ret)
+		return ret;
+
+	if (timed)
+		ktime_get_ts64(&ts2);
+
+	if (timed)
+		mmc_test_print_avg_rate(test, sz, count, &ts1, &ts2);
+
+	return 0;
+}
+
+static int mmc_test_area_io(struct mmc_test_card *test, unsigned long sz,
+			    unsigned int dev_addr, int write, int max_scatter,
+			    int timed)
+{
+	return mmc_test_area_io_seq(test, sz, dev_addr, write, max_scatter,
+				    timed, 1, false, 0);
+}
+
+/*
+ * Write the test area entirely.
+ */
+static int mmc_test_area_fill(struct mmc_test_card *test)
+{
+	struct mmc_test_area *t = &test->area;
+
+	return mmc_test_area_io(test, t->max_tfr, t->dev_addr, 1, 0, 0);
+}
+
+/*
+ * Erase the test area entirely.
+ */
+static int mmc_test_area_erase(struct mmc_test_card *test)
+{
+	struct mmc_test_area *t = &test->area;
+
+	if (!mmc_can_erase(test->card))
+		return 0;
+
+	return mmc_erase(test->card, t->dev_addr, t->max_sz >> 9,
+			 MMC_ERASE_ARG);
+}
+
+/*
+ * Cleanup struct mmc_test_area.
+ */
+static int mmc_test_area_cleanup(struct mmc_test_card *test)
+{
+	struct mmc_test_area *t = &test->area;
+
+	kfree(t->sg);
+	mmc_test_free_mem(t->mem);
+
+	return 0;
+}
+
+/*
+ * Initialize an area for testing large transfers.  The test area is set to the
+ * middle of the card because cards may have different characteristics at the
+ * front (for FAT file system optimization).  Optionally, the area is erased
+ * (if the card supports it) which may improve write performance.  Optionally,
+ * the area is filled with data for subsequent read tests.
+ */
+static int mmc_test_area_init(struct mmc_test_card *test, int erase, int fill)
+{
+	struct mmc_test_area *t = &test->area;
+	unsigned long min_sz = 64 * 1024, sz;
+	int ret;
+
+	ret = mmc_test_set_blksize(test, 512);
+	if (ret)
+		return ret;
+
+	/* Make the test area size about 4MiB */
+	sz = (unsigned long)test->card->pref_erase << 9;
+	t->max_sz = sz;
+	while (t->max_sz < 4 * 1024 * 1024)
+		t->max_sz += sz;
+	while (t->max_sz > TEST_AREA_MAX_SIZE && t->max_sz > sz)
+		t->max_sz -= sz;
+
+	t->max_segs = test->card->host->max_segs;
+	t->max_seg_sz = test->card->host->max_seg_size;
+	t->max_seg_sz -= t->max_seg_sz % 512;
+
+	t->max_tfr = t->max_sz;
+	if (t->max_tfr >> 9 > test->card->host->max_blk_count)
+		t->max_tfr = test->card->host->max_blk_count << 9;
+	if (t->max_tfr > test->card->host->max_req_size)
+		t->max_tfr = test->card->host->max_req_size;
+	if (t->max_tfr / t->max_seg_sz > t->max_segs)
+		t->max_tfr = t->max_segs * t->max_seg_sz;
+
+	/*
+	 * Try to allocate enough memory for a max. sized transfer.  Less is OK
+	 * because the same memory can be mapped into the scatterlist more than
+	 * once.  Also, take into account the limits imposed on scatterlist
+	 * segments by the host driver.
+	 */
+	t->mem = mmc_test_alloc_mem(min_sz, t->max_tfr, t->max_segs,
+				    t->max_seg_sz);
+	if (!t->mem)
+		return -ENOMEM;
+
+	t->sg = kmalloc_array(t->max_segs, sizeof(*t->sg), GFP_KERNEL);
+	if (!t->sg) {
+		ret = -ENOMEM;
+		goto out_free;
+	}
+
+	t->dev_addr = mmc_test_capacity(test->card) / 2;
+	t->dev_addr -= t->dev_addr % (t->max_sz >> 9);
+
+	if (erase) {
+		ret = mmc_test_area_erase(test);
+		if (ret)
+			goto out_free;
+	}
+
+	if (fill) {
+		ret = mmc_test_area_fill(test);
+		if (ret)
+			goto out_free;
+	}
+
+	return 0;
+
+out_free:
+	mmc_test_area_cleanup(test);
+	return ret;
+}
+
+/*
+ * Prepare for large transfers.  Do not erase the test area.
+ */
+static int mmc_test_area_prepare(struct mmc_test_card *test)
+{
+	return mmc_test_area_init(test, 0, 0);
+}
+
+/*
+ * Prepare for large transfers.  Do erase the test area.
+ */
+static int mmc_test_area_prepare_erase(struct mmc_test_card *test)
+{
+	return mmc_test_area_init(test, 1, 0);
+}
+
+/*
+ * Prepare for large transfers.  Erase and fill the test area.
+ */
+static int mmc_test_area_prepare_fill(struct mmc_test_card *test)
+{
+	return mmc_test_area_init(test, 1, 1);
+}
+
+/*
+ * Test best-case performance.  Best-case performance is expected from
+ * a single large transfer.
+ *
+ * An additional option (max_scatter) allows the measurement of the same
+ * transfer but with no contiguous pages in the scatter list.  This tests
+ * the efficiency of DMA to handle scattered pages.
+ */
+static int mmc_test_best_performance(struct mmc_test_card *test, int write,
+				     int max_scatter)
+{
+	struct mmc_test_area *t = &test->area;
+
+	return mmc_test_area_io(test, t->max_tfr, t->dev_addr, write,
+				max_scatter, 1);
+}
+
+/*
+ * Best-case read performance.
+ */
+static int mmc_test_best_read_performance(struct mmc_test_card *test)
+{
+	return mmc_test_best_performance(test, 0, 0);
+}
+
+/*
+ * Best-case write performance.
+ */
+static int mmc_test_best_write_performance(struct mmc_test_card *test)
+{
+	return mmc_test_best_performance(test, 1, 0);
+}
+
+/*
+ * Best-case read performance into scattered pages.
+ */
+static int mmc_test_best_read_perf_max_scatter(struct mmc_test_card *test)
+{
+	return mmc_test_best_performance(test, 0, 1);
+}
+
+/*
+ * Best-case write performance from scattered pages.
+ */
+static int mmc_test_best_write_perf_max_scatter(struct mmc_test_card *test)
+{
+	return mmc_test_best_performance(test, 1, 1);
+}
+
+/*
+ * Single read performance by transfer size.
+ */
+static int mmc_test_profile_read_perf(struct mmc_test_card *test)
+{
+	struct mmc_test_area *t = &test->area;
+	unsigned long sz;
+	unsigned int dev_addr;
+	int ret;
+
+	for (sz = 512; sz < t->max_tfr; sz <<= 1) {
+		dev_addr = t->dev_addr + (sz >> 9);
+		ret = mmc_test_area_io(test, sz, dev_addr, 0, 0, 1);
+		if (ret)
+			return ret;
+	}
+	sz = t->max_tfr;
+	dev_addr = t->dev_addr;
+	return mmc_test_area_io(test, sz, dev_addr, 0, 0, 1);
+}
+
+/*
+ * Single write performance by transfer size.
+ */
+static int mmc_test_profile_write_perf(struct mmc_test_card *test)
+{
+	struct mmc_test_area *t = &test->area;
+	unsigned long sz;
+	unsigned int dev_addr;
+	int ret;
+
+	ret = mmc_test_area_erase(test);
+	if (ret)
+		return ret;
+	for (sz = 512; sz < t->max_tfr; sz <<= 1) {
+		dev_addr = t->dev_addr + (sz >> 9);
+		ret = mmc_test_area_io(test, sz, dev_addr, 1, 0, 1);
+		if (ret)
+			return ret;
+	}
+	ret = mmc_test_area_erase(test);
+	if (ret)
+		return ret;
+	sz = t->max_tfr;
+	dev_addr = t->dev_addr;
+	return mmc_test_area_io(test, sz, dev_addr, 1, 0, 1);
+}
+
+/*
+ * Single trim performance by transfer size.
+ */
+static int mmc_test_profile_trim_perf(struct mmc_test_card *test)
+{
+	struct mmc_test_area *t = &test->area;
+	unsigned long sz;
+	unsigned int dev_addr;
+	struct timespec64 ts1, ts2;
+	int ret;
+
+	if (!mmc_can_trim(test->card))
+		return RESULT_UNSUP_CARD;
+
+	if (!mmc_can_erase(test->card))
+		return RESULT_UNSUP_HOST;
+
+	for (sz = 512; sz < t->max_sz; sz <<= 1) {
+		dev_addr = t->dev_addr + (sz >> 9);
+		ktime_get_ts64(&ts1);
+		ret = mmc_erase(test->card, dev_addr, sz >> 9, MMC_TRIM_ARG);
+		if (ret)
+			return ret;
+		ktime_get_ts64(&ts2);
+		mmc_test_print_rate(test, sz, &ts1, &ts2);
+	}
+	dev_addr = t->dev_addr;
+	ktime_get_ts64(&ts1);
+	ret = mmc_erase(test->card, dev_addr, sz >> 9, MMC_TRIM_ARG);
+	if (ret)
+		return ret;
+	ktime_get_ts64(&ts2);
+	mmc_test_print_rate(test, sz, &ts1, &ts2);
+	return 0;
+}
+
+static int mmc_test_seq_read_perf(struct mmc_test_card *test, unsigned long sz)
+{
+	struct mmc_test_area *t = &test->area;
+	unsigned int dev_addr, i, cnt;
+	struct timespec64 ts1, ts2;
+	int ret;
+
+	cnt = t->max_sz / sz;
+	dev_addr = t->dev_addr;
+	ktime_get_ts64(&ts1);
+	for (i = 0; i < cnt; i++) {
+		ret = mmc_test_area_io(test, sz, dev_addr, 0, 0, 0);
+		if (ret)
+			return ret;
+		dev_addr += (sz >> 9);
+	}
+	ktime_get_ts64(&ts2);
+	mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2);
+	return 0;
+}
+
+/*
+ * Consecutive read performance by transfer size.
+ */
+static int mmc_test_profile_seq_read_perf(struct mmc_test_card *test)
+{
+	struct mmc_test_area *t = &test->area;
+	unsigned long sz;
+	int ret;
+
+	for (sz = 512; sz < t->max_tfr; sz <<= 1) {
+		ret = mmc_test_seq_read_perf(test, sz);
+		if (ret)
+			return ret;
+	}
+	sz = t->max_tfr;
+	return mmc_test_seq_read_perf(test, sz);
+}
+
+static int mmc_test_seq_write_perf(struct mmc_test_card *test, unsigned long sz)
+{
+	struct mmc_test_area *t = &test->area;
+	unsigned int dev_addr, i, cnt;
+	struct timespec64 ts1, ts2;
+	int ret;
+
+	ret = mmc_test_area_erase(test);
+	if (ret)
+		return ret;
+	cnt = t->max_sz / sz;
+	dev_addr = t->dev_addr;
+	ktime_get_ts64(&ts1);
+	for (i = 0; i < cnt; i++) {
+		ret = mmc_test_area_io(test, sz, dev_addr, 1, 0, 0);
+		if (ret)
+			return ret;
+		dev_addr += (sz >> 9);
+	}
+	ktime_get_ts64(&ts2);
+	mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2);
+	return 0;
+}
+
+/*
+ * Consecutive write performance by transfer size.
+ */
+static int mmc_test_profile_seq_write_perf(struct mmc_test_card *test)
+{
+	struct mmc_test_area *t = &test->area;
+	unsigned long sz;
+	int ret;
+
+	for (sz = 512; sz < t->max_tfr; sz <<= 1) {
+		ret = mmc_test_seq_write_perf(test, sz);
+		if (ret)
+			return ret;
+	}
+	sz = t->max_tfr;
+	return mmc_test_seq_write_perf(test, sz);
+}
+
+/*
+ * Consecutive trim performance by transfer size.
+ */
+static int mmc_test_profile_seq_trim_perf(struct mmc_test_card *test)
+{
+	struct mmc_test_area *t = &test->area;
+	unsigned long sz;
+	unsigned int dev_addr, i, cnt;
+	struct timespec64 ts1, ts2;
+	int ret;
+
+	if (!mmc_can_trim(test->card))
+		return RESULT_UNSUP_CARD;
+
+	if (!mmc_can_erase(test->card))
+		return RESULT_UNSUP_HOST;
+
+	for (sz = 512; sz <= t->max_sz; sz <<= 1) {
+		ret = mmc_test_area_erase(test);
+		if (ret)
+			return ret;
+		ret = mmc_test_area_fill(test);
+		if (ret)
+			return ret;
+		cnt = t->max_sz / sz;
+		dev_addr = t->dev_addr;
+		ktime_get_ts64(&ts1);
+		for (i = 0; i < cnt; i++) {
+			ret = mmc_erase(test->card, dev_addr, sz >> 9,
+					MMC_TRIM_ARG);
+			if (ret)
+				return ret;
+			dev_addr += (sz >> 9);
+		}
+		ktime_get_ts64(&ts2);
+		mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2);
+	}
+	return 0;
+}
+
+static unsigned int rnd_next = 1;
+
+static unsigned int mmc_test_rnd_num(unsigned int rnd_cnt)
+{
+	uint64_t r;
+
+	rnd_next = rnd_next * 1103515245 + 12345;
+	r = (rnd_next >> 16) & 0x7fff;
+	return (r * rnd_cnt) >> 15;
+}
+
+static int mmc_test_rnd_perf(struct mmc_test_card *test, int write, int print,
+			     unsigned long sz)
+{
+	unsigned int dev_addr, cnt, rnd_addr, range1, range2, last_ea = 0, ea;
+	unsigned int ssz;
+	struct timespec64 ts1, ts2, ts;
+	int ret;
+
+	ssz = sz >> 9;
+
+	rnd_addr = mmc_test_capacity(test->card) / 4;
+	range1 = rnd_addr / test->card->pref_erase;
+	range2 = range1 / ssz;
+
+	ktime_get_ts64(&ts1);
+	for (cnt = 0; cnt < UINT_MAX; cnt++) {
+		ktime_get_ts64(&ts2);
+		ts = timespec64_sub(ts2, ts1);
+		if (ts.tv_sec >= 10)
+			break;
+		ea = mmc_test_rnd_num(range1);
+		if (ea == last_ea)
+			ea -= 1;
+		last_ea = ea;
+		dev_addr = rnd_addr + test->card->pref_erase * ea +
+			   ssz * mmc_test_rnd_num(range2);
+		ret = mmc_test_area_io(test, sz, dev_addr, write, 0, 0);
+		if (ret)
+			return ret;
+	}
+	if (print)
+		mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2);
+	return 0;
+}
+
+static int mmc_test_random_perf(struct mmc_test_card *test, int write)
+{
+	struct mmc_test_area *t = &test->area;
+	unsigned int next;
+	unsigned long sz;
+	int ret;
+
+	for (sz = 512; sz < t->max_tfr; sz <<= 1) {
+		/*
+		 * When writing, try to get more consistent results by running
+		 * the test twice with exactly the same I/O but outputting the
+		 * results only for the 2nd run.
+		 */
+		if (write) {
+			next = rnd_next;
+			ret = mmc_test_rnd_perf(test, write, 0, sz);
+			if (ret)
+				return ret;
+			rnd_next = next;
+		}
+		ret = mmc_test_rnd_perf(test, write, 1, sz);
+		if (ret)
+			return ret;
+	}
+	sz = t->max_tfr;
+	if (write) {
+		next = rnd_next;
+		ret = mmc_test_rnd_perf(test, write, 0, sz);
+		if (ret)
+			return ret;
+		rnd_next = next;
+	}
+	return mmc_test_rnd_perf(test, write, 1, sz);
+}
+
+/*
+ * Random read performance by transfer size.
+ */
+static int mmc_test_random_read_perf(struct mmc_test_card *test)
+{
+	return mmc_test_random_perf(test, 0);
+}
+
+/*
+ * Random write performance by transfer size.
+ */
+static int mmc_test_random_write_perf(struct mmc_test_card *test)
+{
+	return mmc_test_random_perf(test, 1);
+}
+
+static int mmc_test_seq_perf(struct mmc_test_card *test, int write,
+			     unsigned int tot_sz, int max_scatter)
+{
+	struct mmc_test_area *t = &test->area;
+	unsigned int dev_addr, i, cnt, sz, ssz;
+	struct timespec64 ts1, ts2;
+	int ret;
+
+	sz = t->max_tfr;
+
+	/*
+	 * In the case of a maximally scattered transfer, the maximum transfer
+	 * size is further limited by using PAGE_SIZE segments.
+	 */
+	if (max_scatter) {
+		unsigned long max_tfr;
+
+		if (t->max_seg_sz >= PAGE_SIZE)
+			max_tfr = t->max_segs * PAGE_SIZE;
+		else
+			max_tfr = t->max_segs * t->max_seg_sz;
+		if (sz > max_tfr)
+			sz = max_tfr;
+	}
+
+	ssz = sz >> 9;
+	dev_addr = mmc_test_capacity(test->card) / 4;
+	if (tot_sz > dev_addr << 9)
+		tot_sz = dev_addr << 9;
+	cnt = tot_sz / sz;
+	dev_addr &= 0xffff0000; /* Round to 64MiB boundary */
+
+	ktime_get_ts64(&ts1);
+	for (i = 0; i < cnt; i++) {
+		ret = mmc_test_area_io(test, sz, dev_addr, write,
+				       max_scatter, 0);
+		if (ret)
+			return ret;
+		dev_addr += ssz;
+	}
+	ktime_get_ts64(&ts2);
+
+	mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2);
+
+	return 0;
+}
+
+static int mmc_test_large_seq_perf(struct mmc_test_card *test, int write)
+{
+	int ret, i;
+
+	for (i = 0; i < 10; i++) {
+		ret = mmc_test_seq_perf(test, write, 10 * 1024 * 1024, 1);
+		if (ret)
+			return ret;
+	}
+	for (i = 0; i < 5; i++) {
+		ret = mmc_test_seq_perf(test, write, 100 * 1024 * 1024, 1);
+		if (ret)
+			return ret;
+	}
+	for (i = 0; i < 3; i++) {
+		ret = mmc_test_seq_perf(test, write, 1000 * 1024 * 1024, 1);
+		if (ret)
+			return ret;
+	}
+
+	return ret;
+}
+
+/*
+ * Large sequential read performance.
+ */
+static int mmc_test_large_seq_read_perf(struct mmc_test_card *test)
+{
+	return mmc_test_large_seq_perf(test, 0);
+}
+
+/*
+ * Large sequential write performance.
+ */
+static int mmc_test_large_seq_write_perf(struct mmc_test_card *test)
+{
+	return mmc_test_large_seq_perf(test, 1);
+}
+
+static int mmc_test_rw_multiple(struct mmc_test_card *test,
+				struct mmc_test_multiple_rw *tdata,
+				unsigned int reqsize, unsigned int size,
+				int min_sg_len)
+{
+	unsigned int dev_addr;
+	struct mmc_test_area *t = &test->area;
+	int ret = 0;
+
+	/* Set up test area */
+	if (size > mmc_test_capacity(test->card) / 2 * 512)
+		size = mmc_test_capacity(test->card) / 2 * 512;
+	if (reqsize > t->max_tfr)
+		reqsize = t->max_tfr;
+	dev_addr = mmc_test_capacity(test->card) / 4;
+	if ((dev_addr & 0xffff0000))
+		dev_addr &= 0xffff0000; /* Round to 64MiB boundary */
+	else
+		dev_addr &= 0xfffff800; /* Round to 1MiB boundary */
+	if (!dev_addr)
+		goto err;
+
+	if (reqsize > size)
+		return 0;
+
+	/* prepare test area */
+	if (mmc_can_erase(test->card) &&
+	    tdata->prepare & MMC_TEST_PREP_ERASE) {
+		ret = mmc_erase(test->card, dev_addr,
+				size / 512, MMC_SECURE_ERASE_ARG);
+		if (ret)
+			ret = mmc_erase(test->card, dev_addr,
+					size / 512, MMC_ERASE_ARG);
+		if (ret)
+			goto err;
+	}
+
+	/* Run test */
+	ret = mmc_test_area_io_seq(test, reqsize, dev_addr,
+				   tdata->do_write, 0, 1, size / reqsize,
+				   tdata->do_nonblock_req, min_sg_len);
+	if (ret)
+		goto err;
+
+	return ret;
+ err:
+	pr_info("[%s] error\n", __func__);
+	return ret;
+}
+
+static int mmc_test_rw_multiple_size(struct mmc_test_card *test,
+				     struct mmc_test_multiple_rw *rw)
+{
+	int ret = 0;
+	int i;
+	void *pre_req = test->card->host->ops->pre_req;
+	void *post_req = test->card->host->ops->post_req;
+
+	if (rw->do_nonblock_req &&
+	    ((!pre_req && post_req) || (pre_req && !post_req))) {
+		pr_info("error: only one of pre/post is defined\n");
+		return -EINVAL;
+	}
+
+	for (i = 0 ; i < rw->len && ret == 0; i++) {
+		ret = mmc_test_rw_multiple(test, rw, rw->bs[i], rw->size, 0);
+		if (ret)
+			break;
+	}
+	return ret;
+}
+
+static int mmc_test_rw_multiple_sg_len(struct mmc_test_card *test,
+				       struct mmc_test_multiple_rw *rw)
+{
+	int ret = 0;
+	int i;
+
+	for (i = 0 ; i < rw->len && ret == 0; i++) {
+		ret = mmc_test_rw_multiple(test, rw, 512 * 1024, rw->size,
+					   rw->sg_len[i]);
+		if (ret)
+			break;
+	}
+	return ret;
+}
+
+/*
+ * Multiple blocking write 4k to 4 MB chunks
+ */
+static int mmc_test_profile_mult_write_blocking_perf(struct mmc_test_card *test)
+{
+	unsigned int bs[] = {1 << 12, 1 << 13, 1 << 14, 1 << 15, 1 << 16,
+			     1 << 17, 1 << 18, 1 << 19, 1 << 20, 1 << 22};
+	struct mmc_test_multiple_rw test_data = {
+		.bs = bs,
+		.size = TEST_AREA_MAX_SIZE,
+		.len = ARRAY_SIZE(bs),
+		.do_write = true,
+		.do_nonblock_req = false,
+		.prepare = MMC_TEST_PREP_ERASE,
+	};
+
+	return mmc_test_rw_multiple_size(test, &test_data);
+};
+
+/*
+ * Multiple non-blocking write 4k to 4 MB chunks
+ */
+static int mmc_test_profile_mult_write_nonblock_perf(struct mmc_test_card *test)
+{
+	unsigned int bs[] = {1 << 12, 1 << 13, 1 << 14, 1 << 15, 1 << 16,
+			     1 << 17, 1 << 18, 1 << 19, 1 << 20, 1 << 22};
+	struct mmc_test_multiple_rw test_data = {
+		.bs = bs,
+		.size = TEST_AREA_MAX_SIZE,
+		.len = ARRAY_SIZE(bs),
+		.do_write = true,
+		.do_nonblock_req = true,
+		.prepare = MMC_TEST_PREP_ERASE,
+	};
+
+	return mmc_test_rw_multiple_size(test, &test_data);
+}
+
+/*
+ * Multiple blocking read 4k to 4 MB chunks
+ */
+static int mmc_test_profile_mult_read_blocking_perf(struct mmc_test_card *test)
+{
+	unsigned int bs[] = {1 << 12, 1 << 13, 1 << 14, 1 << 15, 1 << 16,
+			     1 << 17, 1 << 18, 1 << 19, 1 << 20, 1 << 22};
+	struct mmc_test_multiple_rw test_data = {
+		.bs = bs,
+		.size = TEST_AREA_MAX_SIZE,
+		.len = ARRAY_SIZE(bs),
+		.do_write = false,
+		.do_nonblock_req = false,
+		.prepare = MMC_TEST_PREP_NONE,
+	};
+
+	return mmc_test_rw_multiple_size(test, &test_data);
+}
+
+/*
+ * Multiple non-blocking read 4k to 4 MB chunks
+ */
+static int mmc_test_profile_mult_read_nonblock_perf(struct mmc_test_card *test)
+{
+	unsigned int bs[] = {1 << 12, 1 << 13, 1 << 14, 1 << 15, 1 << 16,
+			     1 << 17, 1 << 18, 1 << 19, 1 << 20, 1 << 22};
+	struct mmc_test_multiple_rw test_data = {
+		.bs = bs,
+		.size = TEST_AREA_MAX_SIZE,
+		.len = ARRAY_SIZE(bs),
+		.do_write = false,
+		.do_nonblock_req = true,
+		.prepare = MMC_TEST_PREP_NONE,
+	};
+
+	return mmc_test_rw_multiple_size(test, &test_data);
+}
+
+/*
+ * Multiple blocking write 1 to 512 sg elements
+ */
+static int mmc_test_profile_sglen_wr_blocking_perf(struct mmc_test_card *test)
+{
+	unsigned int sg_len[] = {1, 1 << 3, 1 << 4, 1 << 5, 1 << 6,
+				 1 << 7, 1 << 8, 1 << 9};
+	struct mmc_test_multiple_rw test_data = {
+		.sg_len = sg_len,
+		.size = TEST_AREA_MAX_SIZE,
+		.len = ARRAY_SIZE(sg_len),
+		.do_write = true,
+		.do_nonblock_req = false,
+		.prepare = MMC_TEST_PREP_ERASE,
+	};
+
+	return mmc_test_rw_multiple_sg_len(test, &test_data);
+};
+
+/*
+ * Multiple non-blocking write 1 to 512 sg elements
+ */
+static int mmc_test_profile_sglen_wr_nonblock_perf(struct mmc_test_card *test)
+{
+	unsigned int sg_len[] = {1, 1 << 3, 1 << 4, 1 << 5, 1 << 6,
+				 1 << 7, 1 << 8, 1 << 9};
+	struct mmc_test_multiple_rw test_data = {
+		.sg_len = sg_len,
+		.size = TEST_AREA_MAX_SIZE,
+		.len = ARRAY_SIZE(sg_len),
+		.do_write = true,
+		.do_nonblock_req = true,
+		.prepare = MMC_TEST_PREP_ERASE,
+	};
+
+	return mmc_test_rw_multiple_sg_len(test, &test_data);
+}
+
+/*
+ * Multiple blocking read 1 to 512 sg elements
+ */
+static int mmc_test_profile_sglen_r_blocking_perf(struct mmc_test_card *test)
+{
+	unsigned int sg_len[] = {1, 1 << 3, 1 << 4, 1 << 5, 1 << 6,
+				 1 << 7, 1 << 8, 1 << 9};
+	struct mmc_test_multiple_rw test_data = {
+		.sg_len = sg_len,
+		.size = TEST_AREA_MAX_SIZE,
+		.len = ARRAY_SIZE(sg_len),
+		.do_write = false,
+		.do_nonblock_req = false,
+		.prepare = MMC_TEST_PREP_NONE,
+	};
+
+	return mmc_test_rw_multiple_sg_len(test, &test_data);
+}
+
+/*
+ * Multiple non-blocking read 1 to 512 sg elements
+ */
+static int mmc_test_profile_sglen_r_nonblock_perf(struct mmc_test_card *test)
+{
+	unsigned int sg_len[] = {1, 1 << 3, 1 << 4, 1 << 5, 1 << 6,
+				 1 << 7, 1 << 8, 1 << 9};
+	struct mmc_test_multiple_rw test_data = {
+		.sg_len = sg_len,
+		.size = TEST_AREA_MAX_SIZE,
+		.len = ARRAY_SIZE(sg_len),
+		.do_write = false,
+		.do_nonblock_req = true,
+		.prepare = MMC_TEST_PREP_NONE,
+	};
+
+	return mmc_test_rw_multiple_sg_len(test, &test_data);
+}
+
+/*
+ * eMMC hardware reset.
+ */
+static int mmc_test_reset(struct mmc_test_card *test)
+{
+	struct mmc_card *card = test->card;
+	struct mmc_host *host = card->host;
+	int err;
+
+	err = mmc_hw_reset(host);
+	if (!err) {
+		/*
+		 * Reset will re-enable the card's command queue, but tests
+		 * expect it to be disabled.
+		 */
+		if (card->ext_csd.cmdq_en)
+			mmc_cmdq_disable(card);
+		return RESULT_OK;
+	} else if (err == -EOPNOTSUPP) {
+		return RESULT_UNSUP_HOST;
+	}
+
+	return RESULT_FAIL;
+}
+
+static int mmc_test_send_status(struct mmc_test_card *test,
+				struct mmc_command *cmd)
+{
+	memset(cmd, 0, sizeof(*cmd));
+
+	cmd->opcode = MMC_SEND_STATUS;
+	if (!mmc_host_is_spi(test->card->host))
+		cmd->arg = test->card->rca << 16;
+	cmd->flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
+
+	return mmc_wait_for_cmd(test->card->host, cmd, 0);
+}
+
+static int mmc_test_ongoing_transfer(struct mmc_test_card *test,
+				     unsigned int dev_addr, int use_sbc,
+				     int repeat_cmd, int write, int use_areq)
+{
+	struct mmc_test_req *rq = mmc_test_req_alloc();
+	struct mmc_host *host = test->card->host;
+	struct mmc_test_area *t = &test->area;
+	struct mmc_request *mrq;
+	unsigned long timeout;
+	bool expired = false;
+	int ret = 0, cmd_ret;
+	u32 status = 0;
+	int count = 0;
+
+	if (!rq)
+		return -ENOMEM;
+
+	mrq = &rq->mrq;
+	if (use_sbc)
+		mrq->sbc = &rq->sbc;
+	mrq->cap_cmd_during_tfr = true;
+
+	mmc_test_prepare_mrq(test, mrq, t->sg, t->sg_len, dev_addr, t->blocks,
+			     512, write);
+
+	if (use_sbc && t->blocks > 1 && !mrq->sbc) {
+		ret =  mmc_host_cmd23(host) ?
+		       RESULT_UNSUP_CARD :
+		       RESULT_UNSUP_HOST;
+		goto out_free;
+	}
+
+	/* Start ongoing data request */
+	if (use_areq) {
+		ret = mmc_test_start_areq(test, mrq, NULL);
+		if (ret)
+			goto out_free;
+	} else {
+		mmc_wait_for_req(host, mrq);
+	}
+
+	timeout = jiffies + msecs_to_jiffies(3000);
+	do {
+		count += 1;
+
+		/* Send status command while data transfer in progress */
+		cmd_ret = mmc_test_send_status(test, &rq->status);
+		if (cmd_ret)
+			break;
+
+		status = rq->status.resp[0];
+		if (status & R1_ERROR) {
+			cmd_ret = -EIO;
+			break;
+		}
+
+		if (mmc_is_req_done(host, mrq))
+			break;
+
+		expired = time_after(jiffies, timeout);
+		if (expired) {
+			pr_info("%s: timeout waiting for Tran state status %#x\n",
+				mmc_hostname(host), status);
+			cmd_ret = -ETIMEDOUT;
+			break;
+		}
+	} while (repeat_cmd && R1_CURRENT_STATE(status) != R1_STATE_TRAN);
+
+	/* Wait for data request to complete */
+	if (use_areq) {
+		ret = mmc_test_start_areq(test, NULL, mrq);
+	} else {
+		mmc_wait_for_req_done(test->card->host, mrq);
+	}
+
+	/*
+	 * For cap_cmd_during_tfr request, upper layer must send stop if
+	 * required.
+	 */
+	if (mrq->data->stop && (mrq->data->error || !mrq->sbc)) {
+		if (ret)
+			mmc_wait_for_cmd(host, mrq->data->stop, 0);
+		else
+			ret = mmc_wait_for_cmd(host, mrq->data->stop, 0);
+	}
+
+	if (ret)
+		goto out_free;
+
+	if (cmd_ret) {
+		pr_info("%s: Send Status failed: status %#x, error %d\n",
+			mmc_hostname(test->card->host), status, cmd_ret);
+	}
+
+	ret = mmc_test_check_result(test, mrq);
+	if (ret)
+		goto out_free;
+
+	ret = mmc_test_wait_busy(test);
+	if (ret)
+		goto out_free;
+
+	if (repeat_cmd && (t->blocks + 1) << 9 > t->max_tfr)
+		pr_info("%s: %d commands completed during transfer of %u blocks\n",
+			mmc_hostname(test->card->host), count, t->blocks);
+
+	if (cmd_ret)
+		ret = cmd_ret;
+out_free:
+	kfree(rq);
+
+	return ret;
+}
+
+static int __mmc_test_cmds_during_tfr(struct mmc_test_card *test,
+				      unsigned long sz, int use_sbc, int write,
+				      int use_areq)
+{
+	struct mmc_test_area *t = &test->area;
+	int ret;
+
+	if (!(test->card->host->caps & MMC_CAP_CMD_DURING_TFR))
+		return RESULT_UNSUP_HOST;
+
+	ret = mmc_test_area_map(test, sz, 0, 0);
+	if (ret)
+		return ret;
+
+	ret = mmc_test_ongoing_transfer(test, t->dev_addr, use_sbc, 0, write,
+					use_areq);
+	if (ret)
+		return ret;
+
+	return mmc_test_ongoing_transfer(test, t->dev_addr, use_sbc, 1, write,
+					 use_areq);
+}
+
+static int mmc_test_cmds_during_tfr(struct mmc_test_card *test, int use_sbc,
+				    int write, int use_areq)
+{
+	struct mmc_test_area *t = &test->area;
+	unsigned long sz;
+	int ret;
+
+	for (sz = 512; sz <= t->max_tfr; sz += 512) {
+		ret = __mmc_test_cmds_during_tfr(test, sz, use_sbc, write,
+						 use_areq);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+/*
+ * Commands during read - no Set Block Count (CMD23).
+ */
+static int mmc_test_cmds_during_read(struct mmc_test_card *test)
+{
+	return mmc_test_cmds_during_tfr(test, 0, 0, 0);
+}
+
+/*
+ * Commands during write - no Set Block Count (CMD23).
+ */
+static int mmc_test_cmds_during_write(struct mmc_test_card *test)
+{
+	return mmc_test_cmds_during_tfr(test, 0, 1, 0);
+}
+
+/*
+ * Commands during read - use Set Block Count (CMD23).
+ */
+static int mmc_test_cmds_during_read_cmd23(struct mmc_test_card *test)
+{
+	return mmc_test_cmds_during_tfr(test, 1, 0, 0);
+}
+
+/*
+ * Commands during write - use Set Block Count (CMD23).
+ */
+static int mmc_test_cmds_during_write_cmd23(struct mmc_test_card *test)
+{
+	return mmc_test_cmds_during_tfr(test, 1, 1, 0);
+}
+
+/*
+ * Commands during non-blocking read - use Set Block Count (CMD23).
+ */
+static int mmc_test_cmds_during_read_cmd23_nonblock(struct mmc_test_card *test)
+{
+	return mmc_test_cmds_during_tfr(test, 1, 0, 1);
+}
+
+/*
+ * Commands during non-blocking write - use Set Block Count (CMD23).
+ */
+static int mmc_test_cmds_during_write_cmd23_nonblock(struct mmc_test_card *test)
+{
+	return mmc_test_cmds_during_tfr(test, 1, 1, 1);
+}
+
+static const struct mmc_test_case mmc_test_cases[] = {
+	{
+		.name = "Basic write (no data verification)",
+		.run = mmc_test_basic_write,
+	},
+
+	{
+		.name = "Basic read (no data verification)",
+		.run = mmc_test_basic_read,
+	},
+
+	{
+		.name = "Basic write (with data verification)",
+		.prepare = mmc_test_prepare_write,
+		.run = mmc_test_verify_write,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Basic read (with data verification)",
+		.prepare = mmc_test_prepare_read,
+		.run = mmc_test_verify_read,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Multi-block write",
+		.prepare = mmc_test_prepare_write,
+		.run = mmc_test_multi_write,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Multi-block read",
+		.prepare = mmc_test_prepare_read,
+		.run = mmc_test_multi_read,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Power of two block writes",
+		.prepare = mmc_test_prepare_write,
+		.run = mmc_test_pow2_write,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Power of two block reads",
+		.prepare = mmc_test_prepare_read,
+		.run = mmc_test_pow2_read,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Weird sized block writes",
+		.prepare = mmc_test_prepare_write,
+		.run = mmc_test_weird_write,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Weird sized block reads",
+		.prepare = mmc_test_prepare_read,
+		.run = mmc_test_weird_read,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Badly aligned write",
+		.prepare = mmc_test_prepare_write,
+		.run = mmc_test_align_write,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Badly aligned read",
+		.prepare = mmc_test_prepare_read,
+		.run = mmc_test_align_read,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Badly aligned multi-block write",
+		.prepare = mmc_test_prepare_write,
+		.run = mmc_test_align_multi_write,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Badly aligned multi-block read",
+		.prepare = mmc_test_prepare_read,
+		.run = mmc_test_align_multi_read,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Correct xfer_size at write (start failure)",
+		.run = mmc_test_xfersize_write,
+	},
+
+	{
+		.name = "Correct xfer_size at read (start failure)",
+		.run = mmc_test_xfersize_read,
+	},
+
+	{
+		.name = "Correct xfer_size at write (midway failure)",
+		.run = mmc_test_multi_xfersize_write,
+	},
+
+	{
+		.name = "Correct xfer_size at read (midway failure)",
+		.run = mmc_test_multi_xfersize_read,
+	},
+
+#ifdef CONFIG_HIGHMEM
+
+	{
+		.name = "Highmem write",
+		.prepare = mmc_test_prepare_write,
+		.run = mmc_test_write_high,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Highmem read",
+		.prepare = mmc_test_prepare_read,
+		.run = mmc_test_read_high,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Multi-block highmem write",
+		.prepare = mmc_test_prepare_write,
+		.run = mmc_test_multi_write_high,
+		.cleanup = mmc_test_cleanup,
+	},
+
+	{
+		.name = "Multi-block highmem read",
+		.prepare = mmc_test_prepare_read,
+		.run = mmc_test_multi_read_high,
+		.cleanup = mmc_test_cleanup,
+	},
+
+#else
+
+	{
+		.name = "Highmem write",
+		.run = mmc_test_no_highmem,
+	},
+
+	{
+		.name = "Highmem read",
+		.run = mmc_test_no_highmem,
+	},
+
+	{
+		.name = "Multi-block highmem write",
+		.run = mmc_test_no_highmem,
+	},
+
+	{
+		.name = "Multi-block highmem read",
+		.run = mmc_test_no_highmem,
+	},
+
+#endif /* CONFIG_HIGHMEM */
+
+	{
+		.name = "Best-case read performance",
+		.prepare = mmc_test_area_prepare_fill,
+		.run = mmc_test_best_read_performance,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Best-case write performance",
+		.prepare = mmc_test_area_prepare_erase,
+		.run = mmc_test_best_write_performance,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Best-case read performance into scattered pages",
+		.prepare = mmc_test_area_prepare_fill,
+		.run = mmc_test_best_read_perf_max_scatter,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Best-case write performance from scattered pages",
+		.prepare = mmc_test_area_prepare_erase,
+		.run = mmc_test_best_write_perf_max_scatter,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Single read performance by transfer size",
+		.prepare = mmc_test_area_prepare_fill,
+		.run = mmc_test_profile_read_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Single write performance by transfer size",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_write_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Single trim performance by transfer size",
+		.prepare = mmc_test_area_prepare_fill,
+		.run = mmc_test_profile_trim_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Consecutive read performance by transfer size",
+		.prepare = mmc_test_area_prepare_fill,
+		.run = mmc_test_profile_seq_read_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Consecutive write performance by transfer size",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_seq_write_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Consecutive trim performance by transfer size",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_seq_trim_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Random read performance by transfer size",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_random_read_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Random write performance by transfer size",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_random_write_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Large sequential read into scattered pages",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_large_seq_read_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Large sequential write from scattered pages",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_large_seq_write_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Write performance with blocking req 4k to 4MB",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_mult_write_blocking_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Write performance with non-blocking req 4k to 4MB",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_mult_write_nonblock_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Read performance with blocking req 4k to 4MB",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_mult_read_blocking_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Read performance with non-blocking req 4k to 4MB",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_mult_read_nonblock_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Write performance blocking req 1 to 512 sg elems",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_sglen_wr_blocking_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Write performance non-blocking req 1 to 512 sg elems",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_sglen_wr_nonblock_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Read performance blocking req 1 to 512 sg elems",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_sglen_r_blocking_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Read performance non-blocking req 1 to 512 sg elems",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_profile_sglen_r_nonblock_perf,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Reset test",
+		.run = mmc_test_reset,
+	},
+
+	{
+		.name = "Commands during read - no Set Block Count (CMD23)",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_cmds_during_read,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Commands during write - no Set Block Count (CMD23)",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_cmds_during_write,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Commands during read - use Set Block Count (CMD23)",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_cmds_during_read_cmd23,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Commands during write - use Set Block Count (CMD23)",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_cmds_during_write_cmd23,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Commands during non-blocking read - use Set Block Count (CMD23)",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_cmds_during_read_cmd23_nonblock,
+		.cleanup = mmc_test_area_cleanup,
+	},
+
+	{
+		.name = "Commands during non-blocking write - use Set Block Count (CMD23)",
+		.prepare = mmc_test_area_prepare,
+		.run = mmc_test_cmds_during_write_cmd23_nonblock,
+		.cleanup = mmc_test_area_cleanup,
+	},
+};
+
+static DEFINE_MUTEX(mmc_test_lock);
+
+static LIST_HEAD(mmc_test_result);
+
+static void mmc_test_run(struct mmc_test_card *test, int testcase)
+{
+	int i, ret;
+
+	pr_info("%s: Starting tests of card %s...\n",
+		mmc_hostname(test->card->host), mmc_card_id(test->card));
+
+	mmc_claim_host(test->card->host);
+
+	for (i = 0; i < ARRAY_SIZE(mmc_test_cases); i++) {
+		struct mmc_test_general_result *gr;
+
+		if (testcase && ((i + 1) != testcase))
+			continue;
+
+		pr_info("%s: Test case %d. %s...\n",
+			mmc_hostname(test->card->host), i + 1,
+			mmc_test_cases[i].name);
+
+		if (mmc_test_cases[i].prepare) {
+			ret = mmc_test_cases[i].prepare(test);
+			if (ret) {
+				pr_info("%s: Result: Prepare stage failed! (%d)\n",
+					mmc_hostname(test->card->host),
+					ret);
+				continue;
+			}
+		}
+
+		gr = kzalloc(sizeof(*gr), GFP_KERNEL);
+		if (gr) {
+			INIT_LIST_HEAD(&gr->tr_lst);
+
+			/* Assign data what we know already */
+			gr->card = test->card;
+			gr->testcase = i;
+
+			/* Append container to global one */
+			list_add_tail(&gr->link, &mmc_test_result);
+
+			/*
+			 * Save the pointer to created container in our private
+			 * structure.
+			 */
+			test->gr = gr;
+		}
+
+		ret = mmc_test_cases[i].run(test);
+		switch (ret) {
+		case RESULT_OK:
+			pr_info("%s: Result: OK\n",
+				mmc_hostname(test->card->host));
+			break;
+		case RESULT_FAIL:
+			pr_info("%s: Result: FAILED\n",
+				mmc_hostname(test->card->host));
+			break;
+		case RESULT_UNSUP_HOST:
+			pr_info("%s: Result: UNSUPPORTED (by host)\n",
+				mmc_hostname(test->card->host));
+			break;
+		case RESULT_UNSUP_CARD:
+			pr_info("%s: Result: UNSUPPORTED (by card)\n",
+				mmc_hostname(test->card->host));
+			break;
+		default:
+			pr_info("%s: Result: ERROR (%d)\n",
+				mmc_hostname(test->card->host), ret);
+		}
+
+		/* Save the result */
+		if (gr)
+			gr->result = ret;
+
+		if (mmc_test_cases[i].cleanup) {
+			ret = mmc_test_cases[i].cleanup(test);
+			if (ret) {
+				pr_info("%s: Warning: Cleanup stage failed! (%d)\n",
+					mmc_hostname(test->card->host),
+					ret);
+			}
+		}
+	}
+
+	mmc_release_host(test->card->host);
+
+	pr_info("%s: Tests completed.\n",
+		mmc_hostname(test->card->host));
+}
+
+static void mmc_test_free_result(struct mmc_card *card)
+{
+	struct mmc_test_general_result *gr, *grs;
+
+	mutex_lock(&mmc_test_lock);
+
+	list_for_each_entry_safe(gr, grs, &mmc_test_result, link) {
+		struct mmc_test_transfer_result *tr, *trs;
+
+		if (card && gr->card != card)
+			continue;
+
+		list_for_each_entry_safe(tr, trs, &gr->tr_lst, link) {
+			list_del(&tr->link);
+			kfree(tr);
+		}
+
+		list_del(&gr->link);
+		kfree(gr);
+	}
+
+	mutex_unlock(&mmc_test_lock);
+}
+
+static LIST_HEAD(mmc_test_file_test);
+
+static int mtf_test_show(struct seq_file *sf, void *data)
+{
+	struct mmc_card *card = (struct mmc_card *)sf->private;
+	struct mmc_test_general_result *gr;
+
+	mutex_lock(&mmc_test_lock);
+
+	list_for_each_entry(gr, &mmc_test_result, link) {
+		struct mmc_test_transfer_result *tr;
+
+		if (gr->card != card)
+			continue;
+
+		seq_printf(sf, "Test %d: %d\n", gr->testcase + 1, gr->result);
+
+		list_for_each_entry(tr, &gr->tr_lst, link) {
+			seq_printf(sf, "%u %d %llu.%09u %u %u.%02u\n",
+				tr->count, tr->sectors,
+				(u64)tr->ts.tv_sec, (u32)tr->ts.tv_nsec,
+				tr->rate, tr->iops / 100, tr->iops % 100);
+		}
+	}
+
+	mutex_unlock(&mmc_test_lock);
+
+	return 0;
+}
+
+static int mtf_test_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, mtf_test_show, inode->i_private);
+}
+
+static ssize_t mtf_test_write(struct file *file, const char __user *buf,
+	size_t count, loff_t *pos)
+{
+	struct seq_file *sf = (struct seq_file *)file->private_data;
+	struct mmc_card *card = (struct mmc_card *)sf->private;
+	struct mmc_test_card *test;
+	long testcase;
+	int ret;
+
+	ret = kstrtol_from_user(buf, count, 10, &testcase);
+	if (ret)
+		return ret;
+
+	test = kzalloc(sizeof(*test), GFP_KERNEL);
+	if (!test)
+		return -ENOMEM;
+
+	/*
+	 * Remove all test cases associated with given card. Thus we have only
+	 * actual data of the last run.
+	 */
+	mmc_test_free_result(card);
+
+	test->card = card;
+
+	test->buffer = kzalloc(BUFFER_SIZE, GFP_KERNEL);
+#ifdef CONFIG_HIGHMEM
+	test->highmem = alloc_pages(GFP_KERNEL | __GFP_HIGHMEM, BUFFER_ORDER);
+#endif
+
+#ifdef CONFIG_HIGHMEM
+	if (test->buffer && test->highmem) {
+#else
+	if (test->buffer) {
+#endif
+		mutex_lock(&mmc_test_lock);
+		mmc_test_run(test, testcase);
+		mutex_unlock(&mmc_test_lock);
+	}
+
+#ifdef CONFIG_HIGHMEM
+	__free_pages(test->highmem, BUFFER_ORDER);
+#endif
+	kfree(test->buffer);
+	kfree(test);
+
+	return count;
+}
+
+static const struct file_operations mmc_test_fops_test = {
+	.open		= mtf_test_open,
+	.read		= seq_read,
+	.write		= mtf_test_write,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static int mtf_testlist_show(struct seq_file *sf, void *data)
+{
+	int i;
+
+	mutex_lock(&mmc_test_lock);
+
+	seq_puts(sf, "0:\tRun all tests\n");
+	for (i = 0; i < ARRAY_SIZE(mmc_test_cases); i++)
+		seq_printf(sf, "%d:\t%s\n", i + 1, mmc_test_cases[i].name);
+
+	mutex_unlock(&mmc_test_lock);
+
+	return 0;
+}
+
+static int mtf_testlist_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, mtf_testlist_show, inode->i_private);
+}
+
+static const struct file_operations mmc_test_fops_testlist = {
+	.open		= mtf_testlist_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static void mmc_test_free_dbgfs_file(struct mmc_card *card)
+{
+	struct mmc_test_dbgfs_file *df, *dfs;
+
+	mutex_lock(&mmc_test_lock);
+
+	list_for_each_entry_safe(df, dfs, &mmc_test_file_test, link) {
+		if (card && df->card != card)
+			continue;
+		debugfs_remove(df->file);
+		list_del(&df->link);
+		kfree(df);
+	}
+
+	mutex_unlock(&mmc_test_lock);
+}
+
+static int __mmc_test_register_dbgfs_file(struct mmc_card *card,
+	const char *name, umode_t mode, const struct file_operations *fops)
+{
+	struct dentry *file = NULL;
+	struct mmc_test_dbgfs_file *df;
+
+	if (card->debugfs_root)
+		file = debugfs_create_file(name, mode, card->debugfs_root,
+			card, fops);
+
+	if (IS_ERR_OR_NULL(file)) {
+		dev_err(&card->dev,
+			"Can't create %s. Perhaps debugfs is disabled.\n",
+			name);
+		return -ENODEV;
+	}
+
+	df = kmalloc(sizeof(*df), GFP_KERNEL);
+	if (!df) {
+		debugfs_remove(file);
+		return -ENOMEM;
+	}
+
+	df->card = card;
+	df->file = file;
+
+	list_add(&df->link, &mmc_test_file_test);
+	return 0;
+}
+
+static int mmc_test_register_dbgfs_file(struct mmc_card *card)
+{
+	int ret;
+
+	mutex_lock(&mmc_test_lock);
+
+	ret = __mmc_test_register_dbgfs_file(card, "test", S_IWUSR | S_IRUGO,
+		&mmc_test_fops_test);
+	if (ret)
+		goto err;
+
+	ret = __mmc_test_register_dbgfs_file(card, "testlist", S_IRUGO,
+		&mmc_test_fops_testlist);
+	if (ret)
+		goto err;
+
+err:
+	mutex_unlock(&mmc_test_lock);
+
+	return ret;
+}
+
+static int mmc_test_probe(struct mmc_card *card)
+{
+	int ret;
+
+	if (!mmc_card_mmc(card) && !mmc_card_sd(card))
+		return -ENODEV;
+
+	ret = mmc_test_register_dbgfs_file(card);
+	if (ret)
+		return ret;
+
+	if (card->ext_csd.cmdq_en) {
+		mmc_claim_host(card->host);
+		ret = mmc_cmdq_disable(card);
+		mmc_release_host(card->host);
+		if (ret)
+			return ret;
+	}
+
+	dev_info(&card->dev, "Card claimed for testing.\n");
+
+	return 0;
+}
+
+static void mmc_test_remove(struct mmc_card *card)
+{
+	if (card->reenable_cmdq) {
+		mmc_claim_host(card->host);
+		mmc_cmdq_enable(card);
+		mmc_release_host(card->host);
+	}
+	mmc_test_free_result(card);
+	mmc_test_free_dbgfs_file(card);
+}
+
+static void mmc_test_shutdown(struct mmc_card *card)
+{
+}
+
+static struct mmc_driver mmc_driver = {
+	.drv		= {
+		.name	= "mmc_test",
+	},
+	.probe		= mmc_test_probe,
+	.remove		= mmc_test_remove,
+	.shutdown	= mmc_test_shutdown,
+};
+
+static int __init mmc_test_init(void)
+{
+	return mmc_register_driver(&mmc_driver);
+}
+
+static void __exit mmc_test_exit(void)
+{
+	/* Clear stalled data if card is still plugged */
+	mmc_test_free_result(NULL);
+	mmc_test_free_dbgfs_file(NULL);
+
+	mmc_unregister_driver(&mmc_driver);
+}
+
+module_init(mmc_test_init);
+module_exit(mmc_test_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Multimedia Card (MMC) host test driver");
+MODULE_AUTHOR("Pierre Ossman");
diff --git a/drivers/mmc/core/pwrseq.c b/drivers/mmc/core/pwrseq.c
new file mode 100644
index 000000000..e3ad30fa8
--- /dev/null
+++ b/drivers/mmc/core/pwrseq.c
@@ -0,0 +1,118 @@
+/*
+ *  Copyright (C) 2014 Linaro Ltd
+ *
+ * Author: Ulf Hansson <ulf.hansson@linaro.org>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ *
+ *  MMC power sequence management
+ */
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/of.h>
+
+#include <linux/mmc/host.h>
+
+#include "pwrseq.h"
+
+static DEFINE_MUTEX(pwrseq_list_mutex);
+static LIST_HEAD(pwrseq_list);
+
+int mmc_pwrseq_alloc(struct mmc_host *host)
+{
+	struct device_node *np;
+	struct mmc_pwrseq *p;
+
+	np = of_parse_phandle(host->parent->of_node, "mmc-pwrseq", 0);
+	if (!np)
+		return 0;
+
+	mutex_lock(&pwrseq_list_mutex);
+	list_for_each_entry(p, &pwrseq_list, pwrseq_node) {
+		if (p->dev->of_node == np) {
+			if (!try_module_get(p->owner))
+				dev_err(host->parent,
+					"increasing module refcount failed\n");
+			else
+				host->pwrseq = p;
+
+			break;
+		}
+	}
+
+	of_node_put(np);
+	mutex_unlock(&pwrseq_list_mutex);
+
+	if (!host->pwrseq)
+		return -EPROBE_DEFER;
+
+	dev_info(host->parent, "allocated mmc-pwrseq\n");
+
+	return 0;
+}
+
+void mmc_pwrseq_pre_power_on(struct mmc_host *host)
+{
+	struct mmc_pwrseq *pwrseq = host->pwrseq;
+
+	if (pwrseq && pwrseq->ops->pre_power_on)
+		pwrseq->ops->pre_power_on(host);
+}
+
+void mmc_pwrseq_post_power_on(struct mmc_host *host)
+{
+	struct mmc_pwrseq *pwrseq = host->pwrseq;
+
+	if (pwrseq && pwrseq->ops->post_power_on)
+		pwrseq->ops->post_power_on(host);
+}
+
+void mmc_pwrseq_power_off(struct mmc_host *host)
+{
+	struct mmc_pwrseq *pwrseq = host->pwrseq;
+
+	if (pwrseq && pwrseq->ops->power_off)
+		pwrseq->ops->power_off(host);
+}
+
+void mmc_pwrseq_reset(struct mmc_host *host)
+{
+	struct mmc_pwrseq *pwrseq = host->pwrseq;
+
+	if (pwrseq && pwrseq->ops->reset)
+		pwrseq->ops->reset(host);
+}
+
+void mmc_pwrseq_free(struct mmc_host *host)
+{
+	struct mmc_pwrseq *pwrseq = host->pwrseq;
+
+	if (pwrseq) {
+		module_put(pwrseq->owner);
+		host->pwrseq = NULL;
+	}
+}
+
+int mmc_pwrseq_register(struct mmc_pwrseq *pwrseq)
+{
+	if (!pwrseq || !pwrseq->ops || !pwrseq->dev)
+		return -EINVAL;
+
+	mutex_lock(&pwrseq_list_mutex);
+	list_add(&pwrseq->pwrseq_node, &pwrseq_list);
+	mutex_unlock(&pwrseq_list_mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mmc_pwrseq_register);
+
+void mmc_pwrseq_unregister(struct mmc_pwrseq *pwrseq)
+{
+	if (pwrseq) {
+		mutex_lock(&pwrseq_list_mutex);
+		list_del(&pwrseq->pwrseq_node);
+		mutex_unlock(&pwrseq_list_mutex);
+	}
+}
+EXPORT_SYMBOL_GPL(mmc_pwrseq_unregister);
diff --git a/drivers/mmc/core/pwrseq.h b/drivers/mmc/core/pwrseq.h
new file mode 100644
index 000000000..819386f4e
--- /dev/null
+++ b/drivers/mmc/core/pwrseq.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2014 Linaro Ltd
+ *
+ * Author: Ulf Hansson <ulf.hansson@linaro.org>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+#ifndef _MMC_CORE_PWRSEQ_H
+#define _MMC_CORE_PWRSEQ_H
+
+#include <linux/types.h>
+
+struct mmc_host;
+struct device;
+struct module;
+
+struct mmc_pwrseq_ops {
+	void (*pre_power_on)(struct mmc_host *host);
+	void (*post_power_on)(struct mmc_host *host);
+	void (*power_off)(struct mmc_host *host);
+	void (*reset)(struct mmc_host *host);
+};
+
+struct mmc_pwrseq {
+	const struct mmc_pwrseq_ops *ops;
+	struct device *dev;
+	struct list_head pwrseq_node;
+	struct module *owner;
+};
+
+#ifdef CONFIG_OF
+
+int mmc_pwrseq_register(struct mmc_pwrseq *pwrseq);
+void mmc_pwrseq_unregister(struct mmc_pwrseq *pwrseq);
+
+int mmc_pwrseq_alloc(struct mmc_host *host);
+void mmc_pwrseq_pre_power_on(struct mmc_host *host);
+void mmc_pwrseq_post_power_on(struct mmc_host *host);
+void mmc_pwrseq_power_off(struct mmc_host *host);
+void mmc_pwrseq_reset(struct mmc_host *host);
+void mmc_pwrseq_free(struct mmc_host *host);
+
+#else
+
+static inline int mmc_pwrseq_register(struct mmc_pwrseq *pwrseq)
+{
+	return -ENOSYS;
+}
+static inline void mmc_pwrseq_unregister(struct mmc_pwrseq *pwrseq) {}
+static inline int mmc_pwrseq_alloc(struct mmc_host *host) { return 0; }
+static inline void mmc_pwrseq_pre_power_on(struct mmc_host *host) {}
+static inline void mmc_pwrseq_post_power_on(struct mmc_host *host) {}
+static inline void mmc_pwrseq_power_off(struct mmc_host *host) {}
+static inline void mmc_pwrseq_reset(struct mmc_host *host) {}
+static inline void mmc_pwrseq_free(struct mmc_host *host) {}
+
+#endif
+
+#endif
diff --git a/drivers/mmc/core/pwrseq_emmc.c b/drivers/mmc/core/pwrseq_emmc.c
new file mode 100644
index 000000000..154f4204d
--- /dev/null
+++ b/drivers/mmc/core/pwrseq_emmc.c
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2015, Samsung Electronics Co., Ltd.
+ *
+ * Author: Marek Szyprowski <m.szyprowski@samsung.com>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ *
+ * Simple eMMC hardware reset provider
+ */
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/reboot.h>
+
+#include <linux/mmc/host.h>
+
+#include "pwrseq.h"
+
+struct mmc_pwrseq_emmc {
+	struct mmc_pwrseq pwrseq;
+	struct notifier_block reset_nb;
+	struct gpio_desc *reset_gpio;
+};
+
+#define to_pwrseq_emmc(p) container_of(p, struct mmc_pwrseq_emmc, pwrseq)
+
+static void mmc_pwrseq_emmc_reset(struct mmc_host *host)
+{
+	struct mmc_pwrseq_emmc *pwrseq =  to_pwrseq_emmc(host->pwrseq);
+
+	gpiod_set_value_cansleep(pwrseq->reset_gpio, 1);
+	udelay(1);
+	gpiod_set_value_cansleep(pwrseq->reset_gpio, 0);
+	udelay(200);
+}
+
+static int mmc_pwrseq_emmc_reset_nb(struct notifier_block *this,
+				    unsigned long mode, void *cmd)
+{
+	struct mmc_pwrseq_emmc *pwrseq = container_of(this,
+					struct mmc_pwrseq_emmc, reset_nb);
+	gpiod_set_value(pwrseq->reset_gpio, 1);
+	udelay(1);
+	gpiod_set_value(pwrseq->reset_gpio, 0);
+	udelay(200);
+
+	return NOTIFY_DONE;
+}
+
+static const struct mmc_pwrseq_ops mmc_pwrseq_emmc_ops = {
+	.reset = mmc_pwrseq_emmc_reset,
+};
+
+static int mmc_pwrseq_emmc_probe(struct platform_device *pdev)
+{
+	struct mmc_pwrseq_emmc *pwrseq;
+	struct device *dev = &pdev->dev;
+
+	pwrseq = devm_kzalloc(dev, sizeof(*pwrseq), GFP_KERNEL);
+	if (!pwrseq)
+		return -ENOMEM;
+
+	pwrseq->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(pwrseq->reset_gpio))
+		return PTR_ERR(pwrseq->reset_gpio);
+
+	if (!gpiod_cansleep(pwrseq->reset_gpio)) {
+		/*
+		 * register reset handler to ensure emmc reset also from
+		 * emergency_reboot(), priority 255 is the highest priority
+		 * so it will be executed before any system reboot handler.
+		 */
+		pwrseq->reset_nb.notifier_call = mmc_pwrseq_emmc_reset_nb;
+		pwrseq->reset_nb.priority = 255;
+		register_restart_handler(&pwrseq->reset_nb);
+	} else {
+		dev_notice(dev, "EMMC reset pin tied to a sleepy GPIO driver; reset on emergency-reboot disabled\n");
+	}
+
+	pwrseq->pwrseq.ops = &mmc_pwrseq_emmc_ops;
+	pwrseq->pwrseq.dev = dev;
+	pwrseq->pwrseq.owner = THIS_MODULE;
+	platform_set_drvdata(pdev, pwrseq);
+
+	return mmc_pwrseq_register(&pwrseq->pwrseq);
+}
+
+static int mmc_pwrseq_emmc_remove(struct platform_device *pdev)
+{
+	struct mmc_pwrseq_emmc *pwrseq = platform_get_drvdata(pdev);
+
+	unregister_restart_handler(&pwrseq->reset_nb);
+	mmc_pwrseq_unregister(&pwrseq->pwrseq);
+
+	return 0;
+}
+
+static const struct of_device_id mmc_pwrseq_emmc_of_match[] = {
+	{ .compatible = "mmc-pwrseq-emmc",},
+	{/* sentinel */},
+};
+
+MODULE_DEVICE_TABLE(of, mmc_pwrseq_emmc_of_match);
+
+static struct platform_driver mmc_pwrseq_emmc_driver = {
+	.probe = mmc_pwrseq_emmc_probe,
+	.remove = mmc_pwrseq_emmc_remove,
+	.driver = {
+		.name = "pwrseq_emmc",
+		.of_match_table = mmc_pwrseq_emmc_of_match,
+	},
+};
+
+module_platform_driver(mmc_pwrseq_emmc_driver);
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mmc/core/pwrseq_sd8787.c b/drivers/mmc/core/pwrseq_sd8787.c
new file mode 100644
index 000000000..1a21e1445
--- /dev/null
+++ b/drivers/mmc/core/pwrseq_sd8787.c
@@ -0,0 +1,117 @@
+/*
+ * pwrseq_sd8787.c - power sequence support for Marvell SD8787 BT + Wifi chip
+ *
+ * Copyright (C) 2016 Matt Ranostay <matt@ranostay.consulting>
+ *
+ * Based on the original work pwrseq_simple.c
+ *  Copyright (C) 2014 Linaro Ltd
+ *  Author: Ulf Hansson <ulf.hansson@linaro.org>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+
+#include <linux/mmc/host.h>
+
+#include "pwrseq.h"
+
+struct mmc_pwrseq_sd8787 {
+	struct mmc_pwrseq pwrseq;
+	struct gpio_desc *reset_gpio;
+	struct gpio_desc *pwrdn_gpio;
+};
+
+#define to_pwrseq_sd8787(p) container_of(p, struct mmc_pwrseq_sd8787, pwrseq)
+
+static void mmc_pwrseq_sd8787_pre_power_on(struct mmc_host *host)
+{
+	struct mmc_pwrseq_sd8787 *pwrseq = to_pwrseq_sd8787(host->pwrseq);
+
+	gpiod_set_value_cansleep(pwrseq->reset_gpio, 1);
+
+	msleep(300);
+	gpiod_set_value_cansleep(pwrseq->pwrdn_gpio, 1);
+}
+
+static void mmc_pwrseq_sd8787_power_off(struct mmc_host *host)
+{
+	struct mmc_pwrseq_sd8787 *pwrseq = to_pwrseq_sd8787(host->pwrseq);
+
+	gpiod_set_value_cansleep(pwrseq->pwrdn_gpio, 0);
+	gpiod_set_value_cansleep(pwrseq->reset_gpio, 0);
+}
+
+static const struct mmc_pwrseq_ops mmc_pwrseq_sd8787_ops = {
+	.pre_power_on = mmc_pwrseq_sd8787_pre_power_on,
+	.power_off = mmc_pwrseq_sd8787_power_off,
+};
+
+static const struct of_device_id mmc_pwrseq_sd8787_of_match[] = {
+	{ .compatible = "mmc-pwrseq-sd8787",},
+	{/* sentinel */},
+};
+MODULE_DEVICE_TABLE(of, mmc_pwrseq_sd8787_of_match);
+
+static int mmc_pwrseq_sd8787_probe(struct platform_device *pdev)
+{
+	struct mmc_pwrseq_sd8787 *pwrseq;
+	struct device *dev = &pdev->dev;
+
+	pwrseq = devm_kzalloc(dev, sizeof(*pwrseq), GFP_KERNEL);
+	if (!pwrseq)
+		return -ENOMEM;
+
+	pwrseq->pwrdn_gpio = devm_gpiod_get(dev, "powerdown", GPIOD_OUT_LOW);
+	if (IS_ERR(pwrseq->pwrdn_gpio))
+		return PTR_ERR(pwrseq->pwrdn_gpio);
+
+	pwrseq->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(pwrseq->reset_gpio))
+		return PTR_ERR(pwrseq->reset_gpio);
+
+	pwrseq->pwrseq.dev = dev;
+	pwrseq->pwrseq.ops = &mmc_pwrseq_sd8787_ops;
+	pwrseq->pwrseq.owner = THIS_MODULE;
+	platform_set_drvdata(pdev, pwrseq);
+
+	return mmc_pwrseq_register(&pwrseq->pwrseq);
+}
+
+static int mmc_pwrseq_sd8787_remove(struct platform_device *pdev)
+{
+	struct mmc_pwrseq_sd8787 *pwrseq = platform_get_drvdata(pdev);
+
+	mmc_pwrseq_unregister(&pwrseq->pwrseq);
+
+	return 0;
+}
+
+static struct platform_driver mmc_pwrseq_sd8787_driver = {
+	.probe = mmc_pwrseq_sd8787_probe,
+	.remove = mmc_pwrseq_sd8787_remove,
+	.driver = {
+		.name = "pwrseq_sd8787",
+		.of_match_table = mmc_pwrseq_sd8787_of_match,
+	},
+};
+
+module_platform_driver(mmc_pwrseq_sd8787_driver);
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mmc/core/pwrseq_simple.c b/drivers/mmc/core/pwrseq_simple.c
new file mode 100644
index 000000000..a8b9fee4d
--- /dev/null
+++ b/drivers/mmc/core/pwrseq_simple.c
@@ -0,0 +1,161 @@
+/*
+ *  Copyright (C) 2014 Linaro Ltd
+ *
+ * Author: Ulf Hansson <ulf.hansson@linaro.org>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ *
+ *  Simple MMC power sequence management
+ */
+#include <linux/clk.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/delay.h>
+#include <linux/property.h>
+
+#include <linux/mmc/host.h>
+
+#include "pwrseq.h"
+
+struct mmc_pwrseq_simple {
+	struct mmc_pwrseq pwrseq;
+	bool clk_enabled;
+	u32 post_power_on_delay_ms;
+	u32 power_off_delay_us;
+	struct clk *ext_clk;
+	struct gpio_descs *reset_gpios;
+};
+
+#define to_pwrseq_simple(p) container_of(p, struct mmc_pwrseq_simple, pwrseq)
+
+static void mmc_pwrseq_simple_set_gpios_value(struct mmc_pwrseq_simple *pwrseq,
+					      int value)
+{
+	struct gpio_descs *reset_gpios = pwrseq->reset_gpios;
+
+	if (!IS_ERR(reset_gpios)) {
+		int i, *values;
+		int nvalues = reset_gpios->ndescs;
+
+		values = kmalloc_array(nvalues, sizeof(int), GFP_KERNEL);
+		if (!values)
+			return;
+
+		for (i = 0; i < nvalues; i++)
+			values[i] = value;
+
+		gpiod_set_array_value_cansleep(nvalues, reset_gpios->desc, values);
+		kfree(values);
+	}
+}
+
+static void mmc_pwrseq_simple_pre_power_on(struct mmc_host *host)
+{
+	struct mmc_pwrseq_simple *pwrseq = to_pwrseq_simple(host->pwrseq);
+
+	if (!IS_ERR(pwrseq->ext_clk) && !pwrseq->clk_enabled) {
+		clk_prepare_enable(pwrseq->ext_clk);
+		pwrseq->clk_enabled = true;
+	}
+
+	mmc_pwrseq_simple_set_gpios_value(pwrseq, 1);
+}
+
+static void mmc_pwrseq_simple_post_power_on(struct mmc_host *host)
+{
+	struct mmc_pwrseq_simple *pwrseq = to_pwrseq_simple(host->pwrseq);
+
+	mmc_pwrseq_simple_set_gpios_value(pwrseq, 0);
+
+	if (pwrseq->post_power_on_delay_ms)
+		msleep(pwrseq->post_power_on_delay_ms);
+}
+
+static void mmc_pwrseq_simple_power_off(struct mmc_host *host)
+{
+	struct mmc_pwrseq_simple *pwrseq = to_pwrseq_simple(host->pwrseq);
+
+	mmc_pwrseq_simple_set_gpios_value(pwrseq, 1);
+
+	if (pwrseq->power_off_delay_us)
+		usleep_range(pwrseq->power_off_delay_us,
+			2 * pwrseq->power_off_delay_us);
+
+	if (!IS_ERR(pwrseq->ext_clk) && pwrseq->clk_enabled) {
+		clk_disable_unprepare(pwrseq->ext_clk);
+		pwrseq->clk_enabled = false;
+	}
+}
+
+static const struct mmc_pwrseq_ops mmc_pwrseq_simple_ops = {
+	.pre_power_on = mmc_pwrseq_simple_pre_power_on,
+	.post_power_on = mmc_pwrseq_simple_post_power_on,
+	.power_off = mmc_pwrseq_simple_power_off,
+};
+
+static const struct of_device_id mmc_pwrseq_simple_of_match[] = {
+	{ .compatible = "mmc-pwrseq-simple",},
+	{/* sentinel */},
+};
+MODULE_DEVICE_TABLE(of, mmc_pwrseq_simple_of_match);
+
+static int mmc_pwrseq_simple_probe(struct platform_device *pdev)
+{
+	struct mmc_pwrseq_simple *pwrseq;
+	struct device *dev = &pdev->dev;
+
+	pwrseq = devm_kzalloc(dev, sizeof(*pwrseq), GFP_KERNEL);
+	if (!pwrseq)
+		return -ENOMEM;
+
+	pwrseq->ext_clk = devm_clk_get(dev, "ext_clock");
+	if (IS_ERR(pwrseq->ext_clk) && PTR_ERR(pwrseq->ext_clk) != -ENOENT)
+		return PTR_ERR(pwrseq->ext_clk);
+
+	pwrseq->reset_gpios = devm_gpiod_get_array(dev, "reset",
+							GPIOD_OUT_HIGH);
+	if (IS_ERR(pwrseq->reset_gpios) &&
+	    PTR_ERR(pwrseq->reset_gpios) != -ENOENT &&
+	    PTR_ERR(pwrseq->reset_gpios) != -ENOSYS) {
+		return PTR_ERR(pwrseq->reset_gpios);
+	}
+
+	device_property_read_u32(dev, "post-power-on-delay-ms",
+				 &pwrseq->post_power_on_delay_ms);
+	device_property_read_u32(dev, "power-off-delay-us",
+				 &pwrseq->power_off_delay_us);
+
+	pwrseq->pwrseq.dev = dev;
+	pwrseq->pwrseq.ops = &mmc_pwrseq_simple_ops;
+	pwrseq->pwrseq.owner = THIS_MODULE;
+	platform_set_drvdata(pdev, pwrseq);
+
+	return mmc_pwrseq_register(&pwrseq->pwrseq);
+}
+
+static int mmc_pwrseq_simple_remove(struct platform_device *pdev)
+{
+	struct mmc_pwrseq_simple *pwrseq = platform_get_drvdata(pdev);
+
+	mmc_pwrseq_unregister(&pwrseq->pwrseq);
+
+	return 0;
+}
+
+static struct platform_driver mmc_pwrseq_simple_driver = {
+	.probe = mmc_pwrseq_simple_probe,
+	.remove = mmc_pwrseq_simple_remove,
+	.driver = {
+		.name = "pwrseq_simple",
+		.of_match_table = mmc_pwrseq_simple_of_match,
+	},
+};
+
+module_platform_driver(mmc_pwrseq_simple_driver);
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c
new file mode 100644
index 000000000..9aaf5a2d8
--- /dev/null
+++ b/drivers/mmc/core/queue.c
@@ -0,0 +1,520 @@
+/*
+ *  Copyright (C) 2003 Russell King, All Rights Reserved.
+ *  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 version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/freezer.h>
+#include <linux/kthread.h>
+#include <linux/scatterlist.h>
+#include <linux/dma-mapping.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+
+#include "queue.h"
+#include "block.h"
+#include "core.h"
+#include "card.h"
+#include "host.h"
+
+static inline bool mmc_cqe_dcmd_busy(struct mmc_queue *mq)
+{
+	/* Allow only 1 DCMD at a time */
+	return mq->in_flight[MMC_ISSUE_DCMD];
+}
+
+void mmc_cqe_check_busy(struct mmc_queue *mq)
+{
+	if ((mq->cqe_busy & MMC_CQE_DCMD_BUSY) && !mmc_cqe_dcmd_busy(mq))
+		mq->cqe_busy &= ~MMC_CQE_DCMD_BUSY;
+
+	mq->cqe_busy &= ~MMC_CQE_QUEUE_FULL;
+}
+
+static inline bool mmc_cqe_can_dcmd(struct mmc_host *host)
+{
+	return host->caps2 & MMC_CAP2_CQE_DCMD;
+}
+
+static enum mmc_issue_type mmc_cqe_issue_type(struct mmc_host *host,
+					      struct request *req)
+{
+	switch (req_op(req)) {
+	case REQ_OP_DRV_IN:
+	case REQ_OP_DRV_OUT:
+	case REQ_OP_DISCARD:
+	case REQ_OP_SECURE_ERASE:
+		return MMC_ISSUE_SYNC;
+	case REQ_OP_FLUSH:
+		return mmc_cqe_can_dcmd(host) ? MMC_ISSUE_DCMD : MMC_ISSUE_SYNC;
+	default:
+		return MMC_ISSUE_ASYNC;
+	}
+}
+
+enum mmc_issue_type mmc_issue_type(struct mmc_queue *mq, struct request *req)
+{
+	struct mmc_host *host = mq->card->host;
+
+	if (mq->use_cqe)
+		return mmc_cqe_issue_type(host, req);
+
+	if (req_op(req) == REQ_OP_READ || req_op(req) == REQ_OP_WRITE)
+		return MMC_ISSUE_ASYNC;
+
+	return MMC_ISSUE_SYNC;
+}
+
+static void __mmc_cqe_recovery_notifier(struct mmc_queue *mq)
+{
+	if (!mq->recovery_needed) {
+		mq->recovery_needed = true;
+		schedule_work(&mq->recovery_work);
+	}
+}
+
+void mmc_cqe_recovery_notifier(struct mmc_request *mrq)
+{
+	struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req,
+						  brq.mrq);
+	struct request *req = mmc_queue_req_to_req(mqrq);
+	struct request_queue *q = req->q;
+	struct mmc_queue *mq = q->queuedata;
+	unsigned long flags;
+
+	spin_lock_irqsave(q->queue_lock, flags);
+	__mmc_cqe_recovery_notifier(mq);
+	spin_unlock_irqrestore(q->queue_lock, flags);
+}
+
+static enum blk_eh_timer_return mmc_cqe_timed_out(struct request *req)
+{
+	struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
+	struct mmc_request *mrq = &mqrq->brq.mrq;
+	struct mmc_queue *mq = req->q->queuedata;
+	struct mmc_host *host = mq->card->host;
+	enum mmc_issue_type issue_type = mmc_issue_type(mq, req);
+	bool recovery_needed = false;
+
+	switch (issue_type) {
+	case MMC_ISSUE_ASYNC:
+	case MMC_ISSUE_DCMD:
+		if (host->cqe_ops->cqe_timeout(host, mrq, &recovery_needed)) {
+			if (recovery_needed)
+				mmc_cqe_recovery_notifier(mrq);
+			return BLK_EH_RESET_TIMER;
+		}
+		/* The request has gone already */
+		return BLK_EH_DONE;
+	default:
+		/* Timeout is handled by mmc core */
+		return BLK_EH_RESET_TIMER;
+	}
+}
+
+static enum blk_eh_timer_return mmc_mq_timed_out(struct request *req,
+						 bool reserved)
+{
+	struct request_queue *q = req->q;
+	struct mmc_queue *mq = q->queuedata;
+	unsigned long flags;
+	bool ignore_tout;
+
+	spin_lock_irqsave(q->queue_lock, flags);
+	ignore_tout = mq->recovery_needed || !mq->use_cqe;
+	spin_unlock_irqrestore(q->queue_lock, flags);
+
+	return ignore_tout ? BLK_EH_RESET_TIMER : mmc_cqe_timed_out(req);
+}
+
+static void mmc_mq_recovery_handler(struct work_struct *work)
+{
+	struct mmc_queue *mq = container_of(work, struct mmc_queue,
+					    recovery_work);
+	struct request_queue *q = mq->queue;
+
+	mmc_get_card(mq->card, &mq->ctx);
+
+	mq->in_recovery = true;
+
+	if (mq->use_cqe)
+		mmc_blk_cqe_recovery(mq);
+	else
+		mmc_blk_mq_recovery(mq);
+
+	mq->in_recovery = false;
+
+	spin_lock_irq(q->queue_lock);
+	mq->recovery_needed = false;
+	spin_unlock_irq(q->queue_lock);
+
+	mmc_put_card(mq->card, &mq->ctx);
+
+	blk_mq_run_hw_queues(q, true);
+}
+
+static struct scatterlist *mmc_alloc_sg(int sg_len, gfp_t gfp)
+{
+	struct scatterlist *sg;
+
+	sg = kmalloc_array(sg_len, sizeof(*sg), gfp);
+	if (sg)
+		sg_init_table(sg, sg_len);
+
+	return sg;
+}
+
+static void mmc_queue_setup_discard(struct request_queue *q,
+				    struct mmc_card *card)
+{
+	unsigned max_discard;
+
+	max_discard = mmc_calc_max_discard(card);
+	if (!max_discard)
+		return;
+
+	blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
+	blk_queue_max_discard_sectors(q, max_discard);
+	q->limits.discard_granularity = card->pref_erase << 9;
+	/* granularity must not be greater than max. discard */
+	if (card->pref_erase > max_discard)
+		q->limits.discard_granularity = SECTOR_SIZE;
+	if (mmc_can_secure_erase_trim(card))
+		blk_queue_flag_set(QUEUE_FLAG_SECERASE, q);
+}
+
+/**
+ * mmc_init_request() - initialize the MMC-specific per-request data
+ * @q: the request queue
+ * @req: the request
+ * @gfp: memory allocation policy
+ */
+static int __mmc_init_request(struct mmc_queue *mq, struct request *req,
+			      gfp_t gfp)
+{
+	struct mmc_queue_req *mq_rq = req_to_mmc_queue_req(req);
+	struct mmc_card *card = mq->card;
+	struct mmc_host *host = card->host;
+
+	mq_rq->sg = mmc_alloc_sg(host->max_segs, gfp);
+	if (!mq_rq->sg)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static void mmc_exit_request(struct request_queue *q, struct request *req)
+{
+	struct mmc_queue_req *mq_rq = req_to_mmc_queue_req(req);
+
+	kfree(mq_rq->sg);
+	mq_rq->sg = NULL;
+}
+
+static int mmc_mq_init_request(struct blk_mq_tag_set *set, struct request *req,
+			       unsigned int hctx_idx, unsigned int numa_node)
+{
+	return __mmc_init_request(set->driver_data, req, GFP_KERNEL);
+}
+
+static void mmc_mq_exit_request(struct blk_mq_tag_set *set, struct request *req,
+				unsigned int hctx_idx)
+{
+	struct mmc_queue *mq = set->driver_data;
+
+	mmc_exit_request(mq->queue, req);
+}
+
+static blk_status_t mmc_mq_queue_rq(struct blk_mq_hw_ctx *hctx,
+				    const struct blk_mq_queue_data *bd)
+{
+	struct request *req = bd->rq;
+	struct request_queue *q = req->q;
+	struct mmc_queue *mq = q->queuedata;
+	struct mmc_card *card = mq->card;
+	struct mmc_host *host = card->host;
+	enum mmc_issue_type issue_type;
+	enum mmc_issued issued;
+	bool get_card, cqe_retune_ok;
+	int ret;
+
+	if (mmc_card_removed(mq->card)) {
+		req->rq_flags |= RQF_QUIET;
+		return BLK_STS_IOERR;
+	}
+
+	issue_type = mmc_issue_type(mq, req);
+
+	spin_lock_irq(q->queue_lock);
+
+	if (mq->recovery_needed || mq->busy) {
+		spin_unlock_irq(q->queue_lock);
+		return BLK_STS_RESOURCE;
+	}
+
+	switch (issue_type) {
+	case MMC_ISSUE_DCMD:
+		if (mmc_cqe_dcmd_busy(mq)) {
+			mq->cqe_busy |= MMC_CQE_DCMD_BUSY;
+			spin_unlock_irq(q->queue_lock);
+			return BLK_STS_RESOURCE;
+		}
+		break;
+	case MMC_ISSUE_ASYNC:
+		break;
+	default:
+		/*
+		 * Timeouts are handled by mmc core, and we don't have a host
+		 * API to abort requests, so we can't handle the timeout anyway.
+		 * However, when the timeout happens, blk_mq_complete_request()
+		 * no longer works (to stop the request disappearing under us).
+		 * To avoid racing with that, set a large timeout.
+		 */
+		req->timeout = 600 * HZ;
+		break;
+	}
+
+	/* Parallel dispatch of requests is not supported at the moment */
+	mq->busy = true;
+
+	mq->in_flight[issue_type] += 1;
+	get_card = (mmc_tot_in_flight(mq) == 1);
+	cqe_retune_ok = (mmc_cqe_qcnt(mq) == 1);
+
+	spin_unlock_irq(q->queue_lock);
+
+	if (!(req->rq_flags & RQF_DONTPREP)) {
+		req_to_mmc_queue_req(req)->retries = 0;
+		req->rq_flags |= RQF_DONTPREP;
+	}
+
+	if (get_card)
+		mmc_get_card(card, &mq->ctx);
+
+	if (mq->use_cqe) {
+		host->retune_now = host->need_retune && cqe_retune_ok &&
+				   !host->hold_retune;
+	}
+
+	blk_mq_start_request(req);
+
+	issued = mmc_blk_mq_issue_rq(mq, req);
+
+	switch (issued) {
+	case MMC_REQ_BUSY:
+		ret = BLK_STS_RESOURCE;
+		break;
+	case MMC_REQ_FAILED_TO_START:
+		ret = BLK_STS_IOERR;
+		break;
+	default:
+		ret = BLK_STS_OK;
+		break;
+	}
+
+	if (issued != MMC_REQ_STARTED) {
+		bool put_card = false;
+
+		spin_lock_irq(q->queue_lock);
+		mq->in_flight[issue_type] -= 1;
+		if (mmc_tot_in_flight(mq) == 0)
+			put_card = true;
+		mq->busy = false;
+		spin_unlock_irq(q->queue_lock);
+		if (put_card)
+			mmc_put_card(card, &mq->ctx);
+	} else {
+		WRITE_ONCE(mq->busy, false);
+	}
+
+	return ret;
+}
+
+static const struct blk_mq_ops mmc_mq_ops = {
+	.queue_rq	= mmc_mq_queue_rq,
+	.init_request	= mmc_mq_init_request,
+	.exit_request	= mmc_mq_exit_request,
+	.complete	= mmc_blk_mq_complete,
+	.timeout	= mmc_mq_timed_out,
+};
+
+static void mmc_setup_queue(struct mmc_queue *mq, struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+	u64 limit = BLK_BOUNCE_HIGH;
+	unsigned block_size = 512;
+
+	if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask)
+		limit = (u64)dma_max_pfn(mmc_dev(host)) << PAGE_SHIFT;
+
+	blk_queue_flag_set(QUEUE_FLAG_NONROT, mq->queue);
+	blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, mq->queue);
+	if (mmc_can_erase(card))
+		mmc_queue_setup_discard(mq->queue, card);
+
+	blk_queue_bounce_limit(mq->queue, limit);
+	blk_queue_max_hw_sectors(mq->queue,
+		min(host->max_blk_count, host->max_req_size / 512));
+	blk_queue_max_segments(mq->queue, host->max_segs);
+
+	if (mmc_card_mmc(card) && card->ext_csd.data_sector_size) {
+		block_size = card->ext_csd.data_sector_size;
+		WARN_ON(block_size != 512 && block_size != 4096);
+	}
+
+	blk_queue_logical_block_size(mq->queue, block_size);
+	blk_queue_max_segment_size(mq->queue,
+			round_down(host->max_seg_size, block_size));
+
+	INIT_WORK(&mq->recovery_work, mmc_mq_recovery_handler);
+	INIT_WORK(&mq->complete_work, mmc_blk_mq_complete_work);
+
+	mutex_init(&mq->complete_lock);
+
+	init_waitqueue_head(&mq->wait);
+}
+
+static int mmc_mq_init_queue(struct mmc_queue *mq, int q_depth,
+			     const struct blk_mq_ops *mq_ops, spinlock_t *lock)
+{
+	int ret;
+
+	memset(&mq->tag_set, 0, sizeof(mq->tag_set));
+	mq->tag_set.ops = mq_ops;
+	mq->tag_set.queue_depth = q_depth;
+	mq->tag_set.numa_node = NUMA_NO_NODE;
+	mq->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_SG_MERGE |
+			    BLK_MQ_F_BLOCKING;
+	mq->tag_set.nr_hw_queues = 1;
+	mq->tag_set.cmd_size = sizeof(struct mmc_queue_req);
+	mq->tag_set.driver_data = mq;
+
+	ret = blk_mq_alloc_tag_set(&mq->tag_set);
+	if (ret)
+		return ret;
+
+	mq->queue = blk_mq_init_queue(&mq->tag_set);
+	if (IS_ERR(mq->queue)) {
+		ret = PTR_ERR(mq->queue);
+		goto free_tag_set;
+	}
+
+	mq->queue->queue_lock = lock;
+	mq->queue->queuedata = mq;
+
+	return 0;
+
+free_tag_set:
+	blk_mq_free_tag_set(&mq->tag_set);
+
+	return ret;
+}
+
+/* Set queue depth to get a reasonable value for q->nr_requests */
+#define MMC_QUEUE_DEPTH 64
+
+static int mmc_mq_init(struct mmc_queue *mq, struct mmc_card *card,
+			 spinlock_t *lock)
+{
+	struct mmc_host *host = card->host;
+	int q_depth;
+	int ret;
+
+	/*
+	 * The queue depth for CQE must match the hardware because the request
+	 * tag is used to index the hardware queue.
+	 */
+	if (mq->use_cqe)
+		q_depth = min_t(int, card->ext_csd.cmdq_depth, host->cqe_qdepth);
+	else
+		q_depth = MMC_QUEUE_DEPTH;
+
+	ret = mmc_mq_init_queue(mq, q_depth, &mmc_mq_ops, lock);
+	if (ret)
+		return ret;
+
+	blk_queue_rq_timeout(mq->queue, 60 * HZ);
+
+	mmc_setup_queue(mq, card);
+
+	return 0;
+}
+
+/**
+ * mmc_init_queue - initialise a queue structure.
+ * @mq: mmc queue
+ * @card: mmc card to attach this queue
+ * @lock: queue lock
+ * @subname: partition subname
+ *
+ * Initialise a MMC card request queue.
+ */
+int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
+		   spinlock_t *lock, const char *subname)
+{
+	struct mmc_host *host = card->host;
+
+	mq->card = card;
+
+	mq->use_cqe = host->cqe_enabled;
+
+	return mmc_mq_init(mq, card, lock);
+}
+
+void mmc_queue_suspend(struct mmc_queue *mq)
+{
+	blk_mq_quiesce_queue(mq->queue);
+
+	/*
+	 * The host remains claimed while there are outstanding requests, so
+	 * simply claiming and releasing here ensures there are none.
+	 */
+	mmc_claim_host(mq->card->host);
+	mmc_release_host(mq->card->host);
+}
+
+void mmc_queue_resume(struct mmc_queue *mq)
+{
+	blk_mq_unquiesce_queue(mq->queue);
+}
+
+void mmc_cleanup_queue(struct mmc_queue *mq)
+{
+	struct request_queue *q = mq->queue;
+
+	/*
+	 * The legacy code handled the possibility of being suspended,
+	 * so do that here too.
+	 */
+	if (blk_queue_quiesced(q))
+		blk_mq_unquiesce_queue(q);
+
+	blk_cleanup_queue(q);
+	blk_mq_free_tag_set(&mq->tag_set);
+
+	/*
+	 * A request can be completed before the next request, potentially
+	 * leaving a complete_work with nothing to do. Such a work item might
+	 * still be queued at this point. Flush it.
+	 */
+	flush_work(&mq->complete_work);
+
+	mq->card = NULL;
+}
+
+/*
+ * Prepare the sg list(s) to be handed of to the host driver
+ */
+unsigned int mmc_queue_map_sg(struct mmc_queue *mq, struct mmc_queue_req *mqrq)
+{
+	struct request *req = mmc_queue_req_to_req(mqrq);
+
+	return blk_rq_map_sg(mq->queue, req, mqrq->sg);
+}
diff --git a/drivers/mmc/core/queue.h b/drivers/mmc/core/queue.h
new file mode 100644
index 000000000..9bf3c9245
--- /dev/null
+++ b/drivers/mmc/core/queue.h
@@ -0,0 +1,124 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef MMC_QUEUE_H
+#define MMC_QUEUE_H
+
+#include <linux/types.h>
+#include <linux/blkdev.h>
+#include <linux/blk-mq.h>
+#include <linux/mmc/core.h>
+#include <linux/mmc/host.h>
+
+enum mmc_issued {
+	MMC_REQ_STARTED,
+	MMC_REQ_BUSY,
+	MMC_REQ_FAILED_TO_START,
+	MMC_REQ_FINISHED,
+};
+
+enum mmc_issue_type {
+	MMC_ISSUE_SYNC,
+	MMC_ISSUE_DCMD,
+	MMC_ISSUE_ASYNC,
+	MMC_ISSUE_MAX,
+};
+
+static inline struct mmc_queue_req *req_to_mmc_queue_req(struct request *rq)
+{
+	return blk_mq_rq_to_pdu(rq);
+}
+
+struct mmc_queue_req;
+
+static inline struct request *mmc_queue_req_to_req(struct mmc_queue_req *mqr)
+{
+	return blk_mq_rq_from_pdu(mqr);
+}
+
+struct mmc_blk_data;
+struct mmc_blk_ioc_data;
+
+struct mmc_blk_request {
+	struct mmc_request	mrq;
+	struct mmc_command	sbc;
+	struct mmc_command	cmd;
+	struct mmc_command	stop;
+	struct mmc_data		data;
+};
+
+/**
+ * enum mmc_drv_op - enumerates the operations in the mmc_queue_req
+ * @MMC_DRV_OP_IOCTL: ioctl operation
+ * @MMC_DRV_OP_IOCTL_RPMB: RPMB-oriented ioctl operation
+ * @MMC_DRV_OP_BOOT_WP: write protect boot partitions
+ * @MMC_DRV_OP_GET_CARD_STATUS: get card status
+ * @MMC_DRV_OP_GET_EXT_CSD: get the EXT CSD from an eMMC card
+ */
+enum mmc_drv_op {
+	MMC_DRV_OP_IOCTL,
+	MMC_DRV_OP_IOCTL_RPMB,
+	MMC_DRV_OP_BOOT_WP,
+	MMC_DRV_OP_GET_CARD_STATUS,
+	MMC_DRV_OP_GET_EXT_CSD,
+};
+
+struct mmc_queue_req {
+	struct mmc_blk_request	brq;
+	struct scatterlist	*sg;
+	enum mmc_drv_op		drv_op;
+	int			drv_op_result;
+	void			*drv_op_data;
+	unsigned int		ioc_count;
+	int			retries;
+};
+
+struct mmc_queue {
+	struct mmc_card		*card;
+	struct mmc_ctx		ctx;
+	struct blk_mq_tag_set	tag_set;
+	struct mmc_blk_data	*blkdata;
+	struct request_queue	*queue;
+	int			in_flight[MMC_ISSUE_MAX];
+	unsigned int		cqe_busy;
+#define MMC_CQE_DCMD_BUSY	BIT(0)
+#define MMC_CQE_QUEUE_FULL	BIT(1)
+	bool			busy;
+	bool			use_cqe;
+	bool			recovery_needed;
+	bool			in_recovery;
+	bool			rw_wait;
+	bool			waiting;
+	struct work_struct	recovery_work;
+	wait_queue_head_t	wait;
+	struct request		*recovery_req;
+	struct request		*complete_req;
+	struct mutex		complete_lock;
+	struct work_struct	complete_work;
+};
+
+extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
+			  const char *);
+extern void mmc_cleanup_queue(struct mmc_queue *);
+extern void mmc_queue_suspend(struct mmc_queue *);
+extern void mmc_queue_resume(struct mmc_queue *);
+extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
+				     struct mmc_queue_req *);
+
+void mmc_cqe_check_busy(struct mmc_queue *mq);
+void mmc_cqe_recovery_notifier(struct mmc_request *mrq);
+
+enum mmc_issue_type mmc_issue_type(struct mmc_queue *mq, struct request *req);
+
+static inline int mmc_tot_in_flight(struct mmc_queue *mq)
+{
+	return mq->in_flight[MMC_ISSUE_SYNC] +
+	       mq->in_flight[MMC_ISSUE_DCMD] +
+	       mq->in_flight[MMC_ISSUE_ASYNC];
+}
+
+static inline int mmc_cqe_qcnt(struct mmc_queue *mq)
+{
+	return mq->in_flight[MMC_ISSUE_DCMD] +
+	       mq->in_flight[MMC_ISSUE_ASYNC];
+}
+
+#endif
diff --git a/drivers/mmc/core/quirks.h b/drivers/mmc/core/quirks.h
new file mode 100644
index 000000000..d5bbe8e54
--- /dev/null
+++ b/drivers/mmc/core/quirks.h
@@ -0,0 +1,173 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  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/mmc/sdio_ids.h>
+
+#include "card.h"
+
+static const struct mmc_fixup mmc_blk_fixups[] = {
+#define INAND_CMD38_ARG_EXT_CSD  113
+#define INAND_CMD38_ARG_ERASE    0x00
+#define INAND_CMD38_ARG_TRIM     0x01
+#define INAND_CMD38_ARG_SECERASE 0x80
+#define INAND_CMD38_ARG_SECTRIM1 0x81
+#define INAND_CMD38_ARG_SECTRIM2 0x88
+	/* CMD38 argument is passed through EXT_CSD[113] */
+	MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
+		  MMC_QUIRK_INAND_CMD38),
+	MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
+		  MMC_QUIRK_INAND_CMD38),
+	MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
+		  MMC_QUIRK_INAND_CMD38),
+	MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
+		  MMC_QUIRK_INAND_CMD38),
+	MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
+		  MMC_QUIRK_INAND_CMD38),
+
+	/*
+	 * Some MMC cards experience performance degradation with CMD23
+	 * instead of CMD12-bounded multiblock transfers. For now we'll
+	 * black list what's bad...
+	 * - Certain Toshiba cards.
+	 *
+	 * N.B. This doesn't affect SD cards.
+	 */
+	MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_BLK_NO_CMD23),
+	MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_BLK_NO_CMD23),
+	MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_BLK_NO_CMD23),
+	MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_BLK_NO_CMD23),
+	MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_BLK_NO_CMD23),
+
+	/*
+	 * Some SD cards lockup while using CMD23 multiblock transfers.
+	 */
+	MMC_FIXUP("AF SD", CID_MANFID_ATP, CID_OEMID_ANY, add_quirk_sd,
+		  MMC_QUIRK_BLK_NO_CMD23),
+	MMC_FIXUP("APUSD", CID_MANFID_APACER, 0x5048, add_quirk_sd,
+		  MMC_QUIRK_BLK_NO_CMD23),
+
+	/*
+	 * Some MMC cards need longer data read timeout than indicated in CSD.
+	 */
+	MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
+		  MMC_QUIRK_LONG_READ_TIME),
+	MMC_FIXUP("008GE0", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_LONG_READ_TIME),
+
+	/*
+	 * On these Samsung MoviNAND parts, performing secure erase or
+	 * secure trim can result in unrecoverable corruption due to a
+	 * firmware bug.
+	 */
+	MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
+	MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
+	MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
+	MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
+	MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
+	MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
+	MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
+	MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
+
+	/*
+	 *  On Some Kingston eMMCs, performing trim can result in
+	 *  unrecoverable data conrruption occasionally due to a firmware bug.
+	 */
+	MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_TRIM_BROKEN),
+	MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_TRIM_BROKEN),
+
+	END_FIXUP
+};
+
+static const struct mmc_fixup mmc_ext_csd_fixups[] = {
+	/*
+	 * Certain Hynix eMMC 4.41 cards might get broken when HPI feature
+	 * is used so disable the HPI feature for such buggy cards.
+	 */
+	MMC_FIXUP_EXT_CSD_REV(CID_NAME_ANY, CID_MANFID_HYNIX,
+			      0x014a, add_quirk, MMC_QUIRK_BROKEN_HPI, 5),
+	/*
+	 * Certain Micron (Numonyx) eMMC 4.5 cards might get broken when HPI
+	 * feature is used so disable the HPI feature for such buggy cards.
+	 */
+	MMC_FIXUP_EXT_CSD_REV(CID_NAME_ANY, CID_MANFID_NUMONYX,
+			      0x014e, add_quirk, MMC_QUIRK_BROKEN_HPI, 6),
+
+	END_FIXUP
+};
+
+
+static const struct mmc_fixup sdio_fixup_methods[] = {
+	SDIO_FIXUP(SDIO_VENDOR_ID_TI_WL1251, SDIO_DEVICE_ID_TI_WL1251,
+		   add_quirk, MMC_QUIRK_NONSTD_FUNC_IF),
+
+	SDIO_FIXUP(SDIO_VENDOR_ID_TI_WL1251, SDIO_DEVICE_ID_TI_WL1251,
+		   add_quirk, MMC_QUIRK_DISABLE_CD),
+
+	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),
+
+	SDIO_FIXUP(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797_F0,
+		   add_quirk, MMC_QUIRK_BROKEN_IRQ_POLLING),
+
+	SDIO_FIXUP(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8887WLAN,
+		   add_limit_rate_quirk, 150000000),
+
+	END_FIXUP
+};
+
+static inline void mmc_fixup_device(struct mmc_card *card,
+				    const struct mmc_fixup *table)
+{
+	const struct mmc_fixup *f;
+	u64 rev = cid_rev_card(card);
+
+	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) &&
+		    (f->ext_csd_rev == EXT_CSD_REV_ANY ||
+		     f->ext_csd_rev == card->ext_csd.rev) &&
+		    rev >= f->rev_start && rev <= f->rev_end) {
+			dev_dbg(&card->dev, "calling %pf\n", f->vendor_fixup);
+			f->vendor_fixup(card, f->data);
+		}
+	}
+}
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
new file mode 100644
index 000000000..c179c4984
--- /dev/null
+++ b/drivers/mmc/core/sd.c
@@ -0,0 +1,1330 @@
+/*
+ *  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/sizes.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/pm_runtime.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 "card.h"
+#include "host.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 taac_exp[] = {
+	1,	10,	100,	1000,	10000,	100000,	1000000, 10000000,
+};
+
+static const unsigned int taac_mant[] = {
+	0,	10,	12,	13,	15,	20,	25,	30,
+	35,	40,	45,	50,	55,	60,	70,	80,
+};
+
+static const unsigned int sd_au_size[] = {
+	0,		SZ_16K / 512,		SZ_32K / 512,	SZ_64K / 512,
+	SZ_128K / 512,	SZ_256K / 512,		SZ_512K / 512,	SZ_1M / 512,
+	SZ_2M / 512,	SZ_4M / 512,		SZ_8M / 512,	(SZ_8M + SZ_4M) / 512,
+	SZ_16M / 512,	(SZ_16M + SZ_8M) / 512,	SZ_32M / 512,	SZ_64M / 512,
+};
+
+#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;
+
+	/*
+	 * 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->taac_ns	 = (taac_exp[e] * taac_mant[m] + 9) / 10;
+		csd->taac_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->dsr_imp = UNSTUFF_BITS(resp, 76, 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;
+		}
+
+		if (UNSTUFF_BITS(resp, 13, 1))
+			mmc_card_set_readonly(card);
+		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->taac_ns	 = 0; /* Unused */
+		csd->taac_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;
+
+		if (UNSTUFF_BITS(resp, 13, 1))
+			mmc_card_set_readonly(card);
+		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);
+
+	/* SD Spec says: any SD Card shall set at least bits 0 and 2 */
+	if (!(scr->bus_widths & SD_SCR_BUS_WIDTH_1) ||
+	    !(scr->bus_widths & SD_SCR_BUS_WIDTH_4)) {
+		pr_err("%s: invalid bus width\n", mmc_hostname(card->host));
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/*
+ * Fetch and process SD Status register.
+ */
+static int mmc_read_ssr(struct mmc_card *card)
+{
+	unsigned int au, es, et, eo;
+	__be32 *raw_ssr;
+	int i;
+
+	if (!(card->csd.cmdclass & CCC_APP_SPEC)) {
+		pr_warn("%s: card lacks mandatory SD Status function\n",
+			mmc_hostname(card->host));
+		return 0;
+	}
+
+	raw_ssr = kmalloc(sizeof(card->raw_ssr), GFP_KERNEL);
+	if (!raw_ssr)
+		return -ENOMEM;
+
+	if (mmc_app_sd_status(card, raw_ssr)) {
+		pr_warn("%s: problem reading SD Status register\n",
+			mmc_hostname(card->host));
+		kfree(raw_ssr);
+		return 0;
+	}
+
+	for (i = 0; i < 16; i++)
+		card->raw_ssr[i] = be32_to_cpu(raw_ssr[i]);
+
+	kfree(raw_ssr);
+
+	/*
+	 * UNSTUFF_BITS only works with four u32s so we have to offset the
+	 * bitfield positions accordingly.
+	 */
+	au = UNSTUFF_BITS(card->raw_ssr, 428 - 384, 4);
+	if (au) {
+		if (au <= 9 || card->scr.sda_spec3) {
+			card->ssr.au = sd_au_size[au];
+			es = UNSTUFF_BITS(card->raw_ssr, 408 - 384, 16);
+			et = UNSTUFF_BITS(card->raw_ssr, 402 - 384, 6);
+			if (es && et) {
+				eo = UNSTUFF_BITS(card->raw_ssr, 400 - 384, 2);
+				card->ssr.erase_timeout = (et * 1000) / es;
+				card->ssr.erase_offset = eo * 1000;
+			}
+		} else {
+			pr_warn("%s: SD Status: Invalid Allocation Unit size\n",
+				mmc_hostname(card->host));
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * 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_warn("%s: card lacks mandatory switch function, performance might suffer\n",
+			mmc_hostname(card->host));
+		return 0;
+	}
+
+	status = kmalloc(64, GFP_KERNEL);
+	if (!status)
+		return -ENOMEM;
+
+	/*
+	 * Find out the card's support bits with a mode 0 operation.
+	 * The argument does not matter, as the support bits do not
+	 * change with the arguments.
+	 */
+	err = mmc_sd_switch(card, 0, 0, 0, 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_warn("%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];
+		/* Driver Strengths supported by the card */
+		card->sw_caps.sd3_drv_type = status[9];
+		card->sw_caps.sd3_curr_limit = status[7] | status[6] << 8;
+	}
+
+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;
+
+	status = kmalloc(64, GFP_KERNEL);
+	if (!status)
+		return -ENOMEM;
+
+	err = mmc_sd_switch(card, 1, 0, 1, status);
+	if (err)
+		goto out;
+
+	if ((status[16] & 0xF) != 1) {
+		pr_warn("%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 card_drv_type, drive_strength, drv_type;
+	int err;
+
+	card->drive_strength = 0;
+
+	card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
+
+	drive_strength = mmc_select_drive_strength(card,
+						   card->sw_caps.uhs_max_dtr,
+						   card_drv_type, &drv_type);
+
+	if (drive_strength) {
+		err = mmc_sd_switch(card, 1, 2, drive_strength, status);
+		if (err)
+			return err;
+		if ((status[15] & 0xF) != drive_strength) {
+			pr_warn("%s: Problem setting drive strength!\n",
+				mmc_hostname(card->host));
+			return 0;
+		}
+		card->drive_strength = drive_strength;
+	}
+
+	if (drv_type)
+		mmc_set_driver_type(card->host, drv_type);
+
+	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 (!mmc_host_uhs(card->host)) {
+		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_warn("%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;
+}
+
+/* Get host's max current setting at its current voltage */
+static u32 sd_get_host_max_current(struct mmc_host *host)
+{
+	u32 voltage, max_current;
+
+	voltage = 1 << host->ios.vdd;
+	switch (voltage) {
+	case MMC_VDD_165_195:
+		max_current = host->max_current_180;
+		break;
+	case MMC_VDD_29_30:
+	case MMC_VDD_30_31:
+		max_current = host->max_current_300;
+		break;
+	case MMC_VDD_32_33:
+	case MMC_VDD_33_34:
+		max_current = host->max_current_330;
+		break;
+	default:
+		max_current = 0;
+	}
+
+	return max_current;
+}
+
+static int sd_set_current_limit(struct mmc_card *card, u8 *status)
+{
+	int current_limit = SD_SET_CURRENT_NO_CHANGE;
+	int err;
+	u32 max_current;
+
+	/*
+	 * Current limit switch is only defined for SDR50, SDR104, and DDR50
+	 * bus speed modes. For other bus speed modes, we do not change the
+	 * current limit.
+	 */
+	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))
+		return 0;
+
+	/*
+	 * Host has different current capabilities when operating at
+	 * different voltages, so find out its max current first.
+	 */
+	max_current = sd_get_host_max_current(card->host);
+
+	/*
+	 * We only check host's capability here, if we set a limit that is
+	 * higher than the card's maximum current, the card will be using its
+	 * maximum current, e.g. if the card's maximum current is 300ma, and
+	 * when we set current limit to 200ma, the card will draw 200ma, and
+	 * when we set current limit to 400/600/800ma, the card will draw its
+	 * maximum 300ma from the host.
+	 *
+	 * The above is incorrect: if we try to set a current limit that is
+	 * not supported by the card, the card can rightfully error out the
+	 * attempt, and remain at the default current limit.  This results
+	 * in a 300mA card being limited to 200mA even though the host
+	 * supports 800mA. Failures seen with SanDisk 8GB UHS cards with
+	 * an iMX6 host. --rmk
+	 */
+	if (max_current >= 800 &&
+	    card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800)
+		current_limit = SD_SET_CURRENT_LIMIT_800;
+	else if (max_current >= 600 &&
+		 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600)
+		current_limit = SD_SET_CURRENT_LIMIT_600;
+	else if (max_current >= 400 &&
+		 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400)
+		current_limit = SD_SET_CURRENT_LIMIT_400;
+	else if (max_current >= 200 &&
+		 card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200)
+		current_limit = SD_SET_CURRENT_LIMIT_200;
+
+	if (current_limit != SD_SET_CURRENT_NO_CHANGE) {
+		err = mmc_sd_switch(card, 1, 3, current_limit, status);
+		if (err)
+			return err;
+
+		if (((status[15] >> 4) & 0x0F) != current_limit)
+			pr_warn("%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->csd.cmdclass & CCC_SWITCH))
+		return 0;
+
+	status = kmalloc(64, GFP_KERNEL);
+	if (!status)
+		return -ENOMEM;
+
+	/* Set 4-bit bus width */
+	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 and tuning is only valid for SDR50 and
+	 * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
+	 */
+	if (!mmc_host_is_spi(card->host) &&
+		(card->host->ios.timing == MMC_TIMING_UHS_SDR50 ||
+		 card->host->ios.timing == MMC_TIMING_UHS_DDR50 ||
+		 card->host->ios.timing == MMC_TIMING_UHS_SDR104)) {
+		err = mmc_execute_tuning(card);
+
+		/*
+		 * As SD Specifications Part1 Physical Layer Specification
+		 * Version 3.01 says, CMD19 tuning is available for unlocked
+		 * cards in transfer state of 1.8V signaling mode. The small
+		 * difference between v3.00 and 3.01 spec means that CMD19
+		 * tuning is also available for DDR50 mode.
+		 */
+		if (err && card->host->ios.timing == MMC_TIMING_UHS_DDR50) {
+			pr_warn("%s: ddr50 tuning failed\n",
+				mmc_hostname(card->host));
+			err = 0;
+		}
+	}
+
+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(ssr,
+	"%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x\n",
+		card->raw_ssr[0], card->raw_ssr[1], card->raw_ssr[2],
+		card->raw_ssr[3], card->raw_ssr[4], card->raw_ssr[5],
+		card->raw_ssr[6], card->raw_ssr[7], card->raw_ssr[8],
+		card->raw_ssr[9], card->raw_ssr[10], card->raw_ssr[11],
+		card->raw_ssr[12], card->raw_ssr[13], card->raw_ssr[14],
+		card->raw_ssr[15]);
+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(ocr, "0x%08x\n", card->ocr);
+MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
+
+
+static ssize_t mmc_dsr_show(struct device *dev,
+                           struct device_attribute *attr,
+                           char *buf)
+{
+       struct mmc_card *card = mmc_dev_to_card(dev);
+       struct mmc_host *host = card->host;
+
+       if (card->csd.dsr_imp && host->dsr_req)
+               return sprintf(buf, "0x%x\n", host->dsr);
+       else
+               /* return default DSR value */
+               return sprintf(buf, "0x%x\n", 0x404);
+}
+
+static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
+
+static struct attribute *sd_std_attrs[] = {
+	&dev_attr_cid.attr,
+	&dev_attr_csd.attr,
+	&dev_attr_scr.attr,
+	&dev_attr_ssr.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_ocr.attr,
+	&dev_attr_rca.attr,
+	&dev_attr_dsr.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(sd_std);
+
+struct device_type sd_type = {
+	.groups = sd_std_groups,
+};
+
+/*
+ * Fetch CID from card.
+ */
+int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
+{
+	int err;
+	u32 max_current;
+	int retries = 10;
+	u32 pocr = ocr;
+
+try_again:
+	if (!retries) {
+		ocr &= ~SD_OCR_S18R;
+		pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host));
+	}
+
+	/*
+	 * 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 the card has failed
+	 * repeatedly to switch however, skip this.
+	 */
+	if (retries && mmc_host_uhs(host))
+		ocr |= SD_OCR_S18R;
+
+	/*
+	 * If the host can supply more than 150mA at current voltage,
+	 * XPC should be set to 1.
+	 */
+	max_current = sd_get_host_max_current(host);
+	if (max_current > 150)
+		ocr |= SD_OCR_XPC;
+
+	err = mmc_send_app_op_cond(host, ocr, rocr);
+	if (err)
+		return err;
+
+	/*
+	 * In case the S18A bit is set in the response, let's start the signal
+	 * voltage switch procedure. SPI mode doesn't support CMD11.
+	 * Note that, according to the spec, the S18A bit is not valid unless
+	 * the CCS bit is set as well. We deliberately deviate from the spec in
+	 * regards to this, which allows UHS-I to be supported for SDSC cards.
+	 */
+	if (!mmc_host_is_spi(host) && rocr && (*rocr & 0x01000000)) {
+		err = mmc_set_uhs_voltage(host, pocr);
+		if (err == -EAGAIN) {
+			retries--;
+			goto try_again;
+		} else if (err) {
+			retries = 0;
+			goto try_again;
+		}
+	}
+
+	err = mmc_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;
+}
+
+static int mmc_sd_get_ro(struct mmc_host *host)
+{
+	int ro;
+
+	/*
+	 * Some systems don't feature a write-protect pin and don't need one.
+	 * E.g. because they only have micro-SD card slot. For those systems
+	 * assume that the SD card is always read-write.
+	 */
+	if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT)
+		return 0;
+
+	if (!host->ops->get_ro)
+		return -1;
+
+	ro = host->ops->get_ro(host);
+
+	return ro;
+}
+
+int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
+	bool reinit)
+{
+	int err;
+
+	if (!reinit) {
+		/*
+		 * Fetch SCR from card.
+		 */
+		err = mmc_app_send_scr(card);
+		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.
+		 */
+		err = mmc_read_switch(card);
+		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 = mmc_sd_get_ro(host);
+
+		if (ro < 0) {
+			pr_warn("%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_hs(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;
+}
+
+static bool mmc_sd_card_using_v18(struct mmc_card *card)
+{
+	/*
+	 * According to the SD spec., the Bus Speed Mode (function group 1) bits
+	 * 2 to 4 are zero if the card is initialized at 3.3V signal level. Thus
+	 * they can be used to determine if the card has already switched to
+	 * 1.8V signaling.
+	 */
+	return card->sw_caps.sd3_bus_mode &
+	       (SD_MODE_UHS_SDR50 | SD_MODE_UHS_SDR104 | SD_MODE_UHS_DDR50);
+}
+
+/*
+ * 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;
+	bool v18_fixup_failed = false;
+
+	WARN_ON(!host->claimed);
+retry:
+	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->ocr = ocr;
+		card->type = MMC_TYPE_SD;
+		memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
+	}
+
+	/*
+	 * Call the optional HC's init_card function to handle quirks.
+	 */
+	if (host->ops->init_card)
+		host->ops->init_card(host, card);
+
+	/*
+	 * 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)
+			goto free_card;
+	}
+
+	if (!oldcard) {
+		err = mmc_sd_get_csd(host, card);
+		if (err)
+			goto free_card;
+
+		mmc_decode_cid(card);
+	}
+
+	/*
+	 * handling only for cards supporting DSR and hosts requesting
+	 * DSR configuration
+	 */
+	if (card->csd.dsr_imp && host->dsr_req)
+		mmc_set_dsr(host);
+
+	/*
+	 * 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;
+	}
+
+	err = mmc_sd_setup_card(host, card, oldcard != NULL);
+	if (err)
+		goto free_card;
+
+	/*
+	 * If the card has not been power cycled, it may still be using 1.8V
+	 * signaling. Detect that situation and try to initialize a UHS-I (1.8V)
+	 * transfer mode.
+	 */
+	if (!v18_fixup_failed && !mmc_host_is_spi(host) && mmc_host_uhs(host) &&
+	    mmc_sd_card_using_v18(card) &&
+	    host->ios.signal_voltage != MMC_SIGNAL_VOLTAGE_180) {
+		/*
+		 * Re-read switch information in case it has changed since
+		 * oldcard was initialized.
+		 */
+		if (oldcard) {
+			err = mmc_read_switch(card);
+			if (err)
+				goto free_card;
+		}
+		if (mmc_sd_card_using_v18(card)) {
+			if (mmc_host_set_uhs_voltage(host) ||
+			    mmc_sd_init_uhs_card(card)) {
+				v18_fixup_failed = true;
+				mmc_power_cycle(host, ocr);
+				if (!oldcard)
+					mmc_remove_card(card);
+				goto retry;
+			}
+			goto done;
+		}
+	}
+
+	/* Initialization sequence for UHS-I cards */
+	if (rocr & SD_ROCR_S18A && mmc_host_uhs(host)) {
+		err = mmc_sd_init_uhs_card(card);
+		if (err)
+			goto free_card;
+	} else {
+		/*
+		 * Attempt to change to high-speed (if supported)
+		 */
+		err = mmc_sd_switch_hs(card);
+		if (err > 0)
+			mmc_set_timing(card->host, MMC_TIMING_SD_HS);
+		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);
+		}
+	}
+
+	if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
+	    host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
+		pr_err("%s: Host failed to negotiate down from 3.3V\n",
+			mmc_hostname(host));
+		err = -EINVAL;
+		goto free_card;
+	}
+done:
+	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)
+{
+	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;
+
+	mmc_get_card(host->card, NULL);
+
+	/*
+	 * Just check if our card has been removed.
+	 */
+	err = _mmc_detect_card_removed(host);
+
+	mmc_put_card(host->card, NULL);
+
+	if (err) {
+		mmc_sd_remove(host);
+
+		mmc_claim_host(host);
+		mmc_detach_bus(host);
+		mmc_power_off(host);
+		mmc_release_host(host);
+	}
+}
+
+static int _mmc_sd_suspend(struct mmc_host *host)
+{
+	int err = 0;
+
+	mmc_claim_host(host);
+
+	if (mmc_card_suspended(host->card))
+		goto out;
+
+	if (!mmc_host_is_spi(host))
+		err = mmc_deselect_cards(host);
+
+	if (!err) {
+		mmc_power_off(host);
+		mmc_card_set_suspended(host->card);
+	}
+
+out:
+	mmc_release_host(host);
+	return err;
+}
+
+/*
+ * Callback for suspend
+ */
+static int mmc_sd_suspend(struct mmc_host *host)
+{
+	int err;
+
+	err = _mmc_sd_suspend(host);
+	if (!err) {
+		pm_runtime_disable(&host->card->dev);
+		pm_runtime_set_suspended(&host->card->dev);
+	}
+
+	return err;
+}
+
+/*
+ * 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 = 0;
+
+	mmc_claim_host(host);
+
+	if (!mmc_card_suspended(host->card))
+		goto out;
+
+	mmc_power_up(host, host->card->ocr);
+	err = mmc_sd_init_card(host, host->card->ocr, host->card);
+	mmc_card_clr_suspended(host->card);
+
+out:
+	mmc_release_host(host);
+	return err;
+}
+
+/*
+ * Callback for resume
+ */
+static int mmc_sd_resume(struct mmc_host *host)
+{
+	pm_runtime_enable(&host->card->dev);
+	return 0;
+}
+
+/*
+ * Callback for runtime_suspend.
+ */
+static int mmc_sd_runtime_suspend(struct mmc_host *host)
+{
+	int err;
+
+	if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
+		return 0;
+
+	err = _mmc_sd_suspend(host);
+	if (err)
+		pr_err("%s: error %d doing aggressive suspend\n",
+			mmc_hostname(host), err);
+
+	return err;
+}
+
+/*
+ * Callback for runtime_resume.
+ */
+static int mmc_sd_runtime_resume(struct mmc_host *host)
+{
+	int err;
+
+	err = _mmc_sd_resume(host);
+	if (err && err != -ENOMEDIUM)
+		pr_err("%s: error %d doing runtime resume\n",
+			mmc_hostname(host), err);
+
+	return 0;
+}
+
+static int mmc_sd_hw_reset(struct mmc_host *host)
+{
+	mmc_power_cycle(host, host->card->ocr);
+	return mmc_sd_init_card(host, host->card->ocr, host->card);
+}
+
+static const struct mmc_bus_ops mmc_sd_ops = {
+	.remove = mmc_sd_remove,
+	.detect = mmc_sd_detect,
+	.runtime_suspend = mmc_sd_runtime_suspend,
+	.runtime_resume = mmc_sd_runtime_resume,
+	.suspend = mmc_sd_suspend,
+	.resume = mmc_sd_resume,
+	.alive = mmc_sd_alive,
+	.shutdown = mmc_sd_suspend,
+	.hw_reset = mmc_sd_hw_reset,
+};
+
+/*
+ * Starting point for SD card init.
+ */
+int mmc_attach_sd(struct mmc_host *host)
+{
+	int err;
+	u32 ocr, rocr;
+
+	WARN_ON(!host->claimed);
+
+	err = mmc_send_app_op_cond(host, 0, &ocr);
+	if (err)
+		return err;
+
+	mmc_attach_bus(host, &mmc_sd_ops);
+	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;
+	}
+
+	/*
+	 * Some SD cards claims an out of spec VDD voltage range. Let's treat
+	 * these bits as being in-valid and especially also bit7.
+	 */
+	ocr &= ~0x7FFF;
+
+	rocr = mmc_select_voltage(host, ocr);
+
+	/*
+	 * Can we support the voltage(s) of the card(s)?
+	 */
+	if (!rocr) {
+		err = -EINVAL;
+		goto err;
+	}
+
+	/*
+	 * Detect and init the card.
+	 */
+	err = mmc_sd_init_card(host, rocr, NULL);
+	if (err)
+		goto err;
+
+	mmc_release_host(host);
+	err = mmc_add_card(host->card);
+	if (err)
+		goto remove_card;
+
+	mmc_claim_host(host);
+	return 0;
+
+remove_card:
+	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/drivers/mmc/core/sd.h b/drivers/mmc/core/sd.h
new file mode 100644
index 000000000..497c026a5
--- /dev/null
+++ b/drivers/mmc/core/sd.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _MMC_CORE_SD_H
+#define _MMC_CORE_SD_H
+
+#include <linux/types.h>
+
+extern struct device_type sd_type;
+
+struct mmc_host;
+struct mmc_card;
+
+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);
+
+#endif
diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c
new file mode 100644
index 000000000..47056d8d1
--- /dev/null
+++ b/drivers/mmc/core/sd_ops.c
@@ -0,0 +1,370 @@
+/*
+ *  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 = {};
+
+	if (WARN_ON(card && card->host != host))
+		return -EINVAL;
+
+	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 = {};
+
+	int i, err;
+
+	if (retries < 0)
+		retries = MMC_CMD_RETRIES;
+
+	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)
+{
+	struct mmc_command cmd = {};
+
+	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;
+	}
+
+	return mmc_wait_for_app_cmd(card->host, card, &cmd, MMC_CMD_RETRIES);
+}
+
+int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
+{
+	struct mmc_command cmd = {};
+	int i, err = 0;
+
+	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 (!i)
+		pr_err("%s: card never left busy state\n", mmc_hostname(host));
+
+	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 = {};
+	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 = {};
+
+	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)
+{
+	int err;
+	struct mmc_request mrq = {};
+	struct mmc_command cmd = {};
+	struct mmc_data data = {};
+	struct scatterlist sg;
+	__be32 *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 ...
+	 */
+	scr = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
+	if (!scr)
+		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, scr, 8);
+
+	mmc_set_data_timeout(&data, card);
+
+	mmc_wait_for_req(card->host, &mrq);
+
+	card->raw_scr[0] = be32_to_cpu(scr[0]);
+	card->raw_scr[1] = be32_to_cpu(scr[1]);
+
+	kfree(scr);
+
+	if (cmd.error)
+		return cmd.error;
+	if (data.error)
+		return data.error;
+
+	return 0;
+}
+
+int mmc_sd_switch(struct mmc_card *card, int mode, int group,
+	u8 value, u8 *resp)
+{
+	struct mmc_request mrq = {};
+	struct mmc_command cmd = {};
+	struct mmc_data data = {};
+	struct scatterlist sg;
+
+	/* 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 = {};
+	struct mmc_command cmd = {};
+	struct mmc_data data = {};
+	struct scatterlist sg;
+
+	/* 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/drivers/mmc/core/sd_ops.h b/drivers/mmc/core/sd_ops.h
new file mode 100644
index 000000000..0e6c3d51e
--- /dev/null
+++ b/drivers/mmc/core/sd_ops.h
@@ -0,0 +1,34 @@
+/*
+ *  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
+
+#include <linux/types.h>
+
+struct mmc_card;
+struct mmc_host;
+struct mmc_command;
+
+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);
+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);
+int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card);
+int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
+	struct mmc_command *cmd, int retries);
+
+#endif
+
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
new file mode 100644
index 000000000..5f1ee88aa
--- /dev/null
+++ b/drivers/mmc/core/sdio.c
@@ -0,0 +1,1224 @@
+/*
+ *  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/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 "card.h"
+#include "host.h"
+#include "bus.h"
+#include "quirks.h"
+#include "sd.h"
+#include "sdio_bus.h"
+#include "mmc_ops.h"
+#include "sd_ops.h"
+#include "sdio_ops.h"
+#include "sdio_cis.h"
+
+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;
+
+	if (WARN_ON(fn > SDIO_MAX_FUNCS))
+		return -EINVAL;
+
+	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;
+
+	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 (mmc_host_uhs(card->host)) {
+				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;
+
+	if ((ctrl & SDIO_BUS_WIDTH_MASK) == SDIO_BUS_WIDTH_RESERVED)
+		pr_warn("%s: SDIO_CCCR_IF is invalid: 0x%02x\n",
+			mmc_hostname(card->host), ctrl);
+
+	/* set as 4-bit bus width */
+	ctrl &= ~SDIO_BUS_WIDTH_MASK;
+	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)
+		err = sdio_enable_wide(card);
+	else 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;
+		err = sdio_enable_wide(card);
+		if (err <= 0)
+			mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1);
+	} else
+		return 0;
+
+	if (err > 0) {
+		mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
+		err = 0;
+	}
+
+	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_hs(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 card_drv_type, drive_strength, drv_type;
+	unsigned char card_strength;
+	int err;
+
+	card->drive_strength = 0;
+
+	card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
+
+	drive_strength = mmc_select_drive_strength(card,
+						   card->sw_caps.uhs_max_dtr,
+						   card_drv_type, &drv_type);
+
+	if (drive_strength) {
+		/* 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);
+
+		/* if error default to drive strength B */
+		err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_DRIVE_STRENGTH,
+				       card_strength, NULL);
+		if (err)
+			return;
+		card->drive_strength = drive_strength;
+	}
+
+	if (drv_type)
+		mmc_set_driver_type(card->host, drv_type);
+}
+
+
+static int sdio_set_bus_speed_mode(struct mmc_card *card)
+{
+	unsigned int bus_speed, timing;
+	int err;
+	unsigned char speed;
+	unsigned int max_rate;
+
+	/*
+	 * If the host doesn't support any of the UHS-I modes, fallback on
+	 * default speed.
+	 */
+	if (!mmc_host_uhs(card->host))
+		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;
+			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)) {
+			bus_speed = SDIO_SPEED_DDR50;
+			timing = MMC_TIMING_UHS_DDR50;
+			card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
+			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)) {
+			bus_speed = SDIO_SPEED_SDR50;
+			timing = MMC_TIMING_UHS_SDR50;
+			card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
+			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)) {
+			bus_speed = SDIO_SPEED_SDR25;
+			timing = MMC_TIMING_UHS_SDR25;
+			card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
+			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)) {
+			bus_speed = SDIO_SPEED_SDR12;
+			timing = MMC_TIMING_UHS_SDR12;
+			card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
+			card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
+	}
+
+	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;
+
+	max_rate = min_not_zero(card->quirk_max_rate,
+				card->sw_caps.uhs_max_dtr);
+
+	if (bus_speed) {
+		mmc_set_timing(card->host, timing);
+		mmc_set_clock(card->host, max_rate);
+	}
+
+	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 */
+	err = sdio_enable_4bit_bus(card);
+	if (err)
+		goto out;
+
+	/* 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;
+
+	/*
+	 * SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and
+	 * SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
+	 */
+	if (!mmc_host_is_spi(card->host) &&
+	    ((card->host->ios.timing == MMC_TIMING_UHS_SDR50) ||
+	      (card->host->ios.timing == MMC_TIMING_UHS_SDR104)))
+		err = mmc_execute_tuning(card);
+out:
+	return err;
+}
+
+static void mmc_sdio_resend_if_cond(struct mmc_host *host,
+				    struct mmc_card *card)
+{
+	sdio_reset(host);
+	mmc_go_idle(host);
+	mmc_send_if_cond(host, host->ocr_avail);
+	mmc_remove_card(card);
+}
+
+/*
+ * 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;
+	int retries = 10;
+	u32 rocr = 0;
+	u32 ocr_card = ocr;
+
+	WARN_ON(!host->claimed);
+
+	/* to query card if 1.8V signalling is supported */
+	if (mmc_host_uhs(host))
+		ocr |= R4_18V_PRESENT;
+
+try_again:
+	if (!retries) {
+		pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host));
+		ocr &= ~R4_18V_PRESENT;
+	}
+
+	/*
+	 * Inform the card of the voltage
+	 */
+	if (!powered_resume) {
+		err = mmc_send_io_op_cond(host, ocr, &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;
+	}
+
+	/*
+	 * Allocate card structure.
+	 */
+	card = mmc_alloc_card(host, NULL);
+	if (IS_ERR(card)) {
+		err = PTR_ERR(card);
+		goto err;
+	}
+
+	if ((rocr & R4_MEMORY_PRESENT) &&
+	    mmc_sd_get_cid(host, ocr & rocr, 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);
+
+	card->ocr = ocr_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 compatibility and some
+	 * systems that claim 1.8v signalling in fact do not support
+	 * it. Per SDIO spec v3, section 3.1.2, if the voltage is already
+	 * 1.8v, the card sets S18A to 0 in the R4 response. So it will
+	 * fails to check rocr & R4_18V_PRESENT,  but we still need to
+	 * try to init uhs card. sdio_read_cccr will take over this task
+	 * to make sure which speed mode should work.
+	 */
+	if (!powered_resume && (rocr & ocr & R4_18V_PRESENT)) {
+		err = mmc_set_uhs_voltage(host, ocr_card);
+		if (err == -EAGAIN) {
+			mmc_sdio_resend_if_cond(host, card);
+			retries--;
+			goto try_again;
+		} else if (err) {
+			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_set_timing(card->host, MMC_TIMING_SD_HS);
+		}
+
+		goto finish;
+	}
+
+	/*
+	 * Read the common registers. Note that we should try to
+	 * validate whether UHS would work or not.
+	 */
+	err = sdio_read_cccr(card, ocr);
+	if (err) {
+		mmc_sdio_resend_if_cond(host, card);
+		if (ocr & R4_18V_PRESENT) {
+			/* Retry init sequence, but without R4_18V_PRESENT. */
+			retries = 0;
+			goto try_again;
+		}
+		return err;
+	}
+
+	/*
+	 * Read the common CIS tuples.
+	 */
+	err = sdio_read_common_cis(card);
+	if (err)
+		goto remove;
+
+	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, sdio_fixup_methods);
+
+	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;
+	} else {
+		/*
+		 * Switch to high-speed (if supported).
+		 */
+		err = sdio_enable_hs(card);
+		if (err > 0)
+			mmc_set_timing(card->host, MMC_TIMING_SD_HS);
+		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)
+			goto remove;
+	}
+
+	if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
+	    host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
+		pr_err("%s: Host failed to negotiate down from 3.3V\n",
+			mmc_hostname(host));
+		err = -EINVAL;
+		goto remove;
+	}
+finish:
+	if (!oldcard)
+		host->card = card;
+	return 0;
+
+remove:
+	if (!oldcard)
+		mmc_remove_card(card);
+
+err:
+	return err;
+}
+
+static int mmc_sdio_reinit_card(struct mmc_host *host, bool powered_resume)
+{
+	int ret;
+
+	sdio_reset(host);
+	mmc_go_idle(host);
+	mmc_send_if_cond(host, host->card->ocr);
+
+	ret = mmc_send_io_op_cond(host, 0, NULL);
+	if (ret)
+		return ret;
+
+	return mmc_sdio_init_card(host, host->card->ocr, host->card,
+				  powered_resume);
+}
+
+/*
+ * Host is being removed. Free up the current card.
+ */
+static void mmc_sdio_remove(struct mmc_host *host)
+{
+	int i;
+
+	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;
+
+	/* 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) {
+			pm_runtime_put_noidle(&host->card->dev);
+			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 pre_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_pre_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;
+				break;
+			}
+		}
+	}
+
+	return err;
+}
+
+/*
+ * SDIO suspend.  Suspend all functions separately.
+ */
+static int mmc_sdio_suspend(struct mmc_host *host)
+{
+	/* Prevent processing of SDIO IRQs in suspended state. */
+	mmc_card_set_suspended(host->card);
+	cancel_delayed_work_sync(&host->sdio_irq_work);
+
+	mmc_claim_host(host);
+
+	if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host))
+		sdio_disable_wide(host->card);
+
+	if (!mmc_card_keep_power(host)) {
+		mmc_power_off(host);
+	} else if (host->retune_period) {
+		mmc_retune_timer_stop(host);
+		mmc_retune_needed(host);
+	}
+
+	mmc_release_host(host);
+
+	return 0;
+}
+
+static int mmc_sdio_resume(struct mmc_host *host)
+{
+	int err = 0;
+
+	/* Basic card reinitialization. */
+	mmc_claim_host(host);
+
+	/* Restore power if needed */
+	if (!mmc_card_keep_power(host)) {
+		mmc_power_up(host, host->card->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 (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);
+		}
+	}
+
+	/* No need to reinitialize powered-resumed nonremovable cards */
+	if (mmc_card_is_removable(host) || !mmc_card_keep_power(host)) {
+		err = mmc_sdio_reinit_card(host, 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)
+		goto out;
+
+	/* Allow SDIO IRQs to be processed again. */
+	mmc_card_clr_suspended(host->card);
+
+	if (host->sdio_irqs) {
+		if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD))
+			wake_up_process(host->sdio_irq_thread);
+		else if (host->caps & MMC_CAP_SDIO_IRQ)
+			host->ops->enable_sdio_irq(host, 1);
+	}
+
+out:
+	mmc_release_host(host);
+
+	host->pm_flags &= ~MMC_PM_KEEP_POWER;
+	return err;
+}
+
+static int mmc_sdio_power_restore(struct mmc_host *host)
+{
+	int ret;
+
+	/*
+	 * 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.
+	 *
+	 */
+
+	mmc_claim_host(host);
+
+	ret = mmc_sdio_reinit_card(host, mmc_card_keep_power(host));
+	if (!ret && host->sdio_irqs)
+		mmc_signal_sdio_irq(host);
+
+	mmc_release_host(host);
+
+	return ret;
+}
+
+static int mmc_sdio_runtime_suspend(struct mmc_host *host)
+{
+	/* No references to the card, cut the power to it. */
+	mmc_claim_host(host);
+	mmc_power_off(host);
+	mmc_release_host(host);
+
+	return 0;
+}
+
+static int mmc_sdio_runtime_resume(struct mmc_host *host)
+{
+	int ret;
+
+	/* Restore power and re-initialize. */
+	mmc_claim_host(host);
+	mmc_power_up(host, host->card->ocr);
+	ret = mmc_sdio_power_restore(host);
+	mmc_release_host(host);
+
+	return ret;
+}
+
+static int mmc_sdio_hw_reset(struct mmc_host *host)
+{
+	mmc_power_cycle(host, host->card->ocr);
+	return mmc_sdio_power_restore(host);
+}
+
+static int mmc_sdio_sw_reset(struct mmc_host *host)
+{
+	mmc_set_clock(host, host->f_init);
+	sdio_reset(host);
+	mmc_go_idle(host);
+
+	mmc_set_initial_state(host);
+	mmc_set_initial_signal_voltage(host);
+
+	return mmc_sdio_reinit_card(host, 0);
+}
+
+static const struct mmc_bus_ops mmc_sdio_ops = {
+	.remove = mmc_sdio_remove,
+	.detect = mmc_sdio_detect,
+	.pre_suspend = mmc_sdio_pre_suspend,
+	.suspend = mmc_sdio_suspend,
+	.resume = mmc_sdio_resume,
+	.runtime_suspend = mmc_sdio_runtime_suspend,
+	.runtime_resume = mmc_sdio_runtime_resume,
+	.alive = mmc_sdio_alive,
+	.hw_reset = mmc_sdio_hw_reset,
+	.sw_reset = mmc_sdio_sw_reset,
+};
+
+
+/*
+ * Starting point for SDIO card init.
+ */
+int mmc_attach_sdio(struct mmc_host *host)
+{
+	int err, i, funcs;
+	u32 ocr, rocr;
+	struct mmc_card *card;
+
+	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;
+
+
+	rocr = mmc_select_voltage(host, ocr);
+
+	/*
+	 * Can we support the voltage(s) of the card(s)?
+	 */
+	if (!rocr) {
+		err = -EINVAL;
+		goto err;
+	}
+
+	/*
+	 * Detect and init the card.
+	 */
+	err = mmc_sdio_init_card(host, rocr, 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) {
+		/*
+		 * Do not allow runtime suspend until after SDIO function
+		 * devices are added.
+		 */
+		pm_runtime_get_noresume(&card->dev);
+
+		/*
+		 * 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;
+
+	/*
+	 * Initialize (but don't add) all present functions.
+	 */
+	for (i = 0; i < funcs; i++, card->sdio_funcs++) {
+		err = sdio_init_func(host->card, i + 1);
+		if (err)
+			goto remove;
+
+		/*
+		 * 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;
+	}
+
+	if (host->caps & MMC_CAP_POWER_OFF_CARD)
+		pm_runtime_put(&card->dev);
+
+	mmc_claim_host(host);
+	return 0;
+
+
+remove:
+	mmc_release_host(host);
+remove_added:
+	/*
+	 * The devices are being deleted so it is not necessary to disable
+	 * runtime PM. Similarly we also don't pm_runtime_put() the SDIO card
+	 * because it needs to be active to remove any function devices that
+	 * were probed, and after that it gets deleted.
+	 */
+	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;
+}
+
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
new file mode 100644
index 000000000..b6d8203e4
--- /dev/null
+++ b/drivers/mmc/core/sdio_bus.c
@@ -0,0 +1,359 @@
+/*
+ *  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/pm_domain.h>
+#include <linux/acpi.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/sdio_func.h>
+#include <linux/of.h>
+
+#include "core.h"
+#include "card.h"
+#include "sdio_cis.h"
+#include "sdio_bus.h"
+
+#define to_sdio_driver(d)	container_of(d, struct sdio_driver, drv)
+
+/* 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);		\
+}									\
+static DEVICE_ATTR_RO(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 DEVICE_ATTR_RO(modalias);
+
+static struct attribute *sdio_dev_attrs[] = {
+	&dev_attr_class.attr,
+	&dev_attr_vendor.attr,
+	&dev_attr_device.attr,
+	&dev_attr_modalias.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(sdio_dev);
+
+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;
+
+	ret = dev_pm_domain_attach(dev, false);
+	if (ret)
+		return ret;
+
+	/* 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 disable_runtimepm;
+	}
+
+	/* 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);
+	dev_pm_domain_detach(dev, false);
+	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_warn("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);
+
+	dev_pm_domain_detach(dev, false);
+
+	return ret;
+}
+
+static const struct dev_pm_ops sdio_bus_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_generic_suspend, pm_generic_resume)
+	SET_RUNTIME_PM_OPS(
+		pm_generic_runtime_suspend,
+		pm_generic_runtime_resume,
+		NULL
+	)
+};
+
+static struct bus_type sdio_bus_type = {
+	.name		= "sdio",
+	.dev_groups	= sdio_dev_groups,
+	.match		= sdio_bus_match,
+	.uevent		= sdio_bus_uevent,
+	.probe		= sdio_bus_probe,
+	.remove		= sdio_bus_remove,
+	.pm		= &sdio_bus_pm_ops,
+};
+
+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);
+
+	sdio_free_func_cis(func);
+
+	kfree(func->info);
+	kfree(func->tmpbuf);
+	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);
+
+	/*
+	 * allocate buffer separately to make sure it's properly aligned for
+	 * DMA usage (incl. 64 bit DMA)
+	 */
+	func->tmpbuf = kmalloc(4, GFP_KERNEL);
+	if (!func->tmpbuf) {
+		kfree(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;
+}
+
+#ifdef CONFIG_ACPI
+static void sdio_acpi_set_handle(struct sdio_func *func)
+{
+	struct mmc_host *host = func->card->host;
+	u64 addr = ((u64)host->slotno << 16) | func->num;
+
+	acpi_preset_companion(&func->dev, ACPI_COMPANION(host->parent), addr);
+}
+#else
+static inline void sdio_acpi_set_handle(struct sdio_func *func) {}
+#endif
+
+static void sdio_set_of_node(struct sdio_func *func)
+{
+	struct mmc_host *host = func->card->host;
+
+	func->dev.of_node = mmc_of_find_child_device(host, func->num);
+}
+
+/*
+ * 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);
+
+	sdio_set_of_node(func);
+	sdio_acpi_set_handle(func);
+	device_enable_async_suspend(&func->dev);
+	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);
+	of_node_put(func->dev.of_node);
+	put_device(&func->dev);
+}
+
diff --git a/drivers/mmc/core/sdio_bus.h b/drivers/mmc/core/sdio_bus.h
new file mode 100644
index 000000000..b69a2540a
--- /dev/null
+++ b/drivers/mmc/core/sdio_bus.h
@@ -0,0 +1,25 @@
+/*
+ *  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 mmc_card;
+struct sdio_func;
+
+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/drivers/mmc/core/sdio_cis.c b/drivers/mmc/core/sdio_cis.c
new file mode 100644
index 000000000..dca72444b
--- /dev/null
+++ b/drivers/mmc/core/sdio_cis.c
@@ -0,0 +1,428 @@
+/*
+ * 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"
+
+#define SDIO_READ_CIS_TIMEOUT_MS  (10 * 1000) /* 10s */
+
+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;
+
+	if (size < 2)
+		return 0;
+
+	/* 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 == 28 && vsn == SDIO_SDIO_REV_1_10) {
+		pr_warn("%s: card has broken SDIO 1.1 CIS, forcing SDIO 1.0\n",
+			mmc_hostname(card->host));
+		vsn = SDIO_SDIO_REV_1_00;
+	} else 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		},
+	{	0x91,	2,	/* cistpl_sdio_std */	},
+};
+
+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;
+
+	if (*prev)
+		return -EINVAL;
+
+	do {
+		unsigned char tpl_code, tpl_link;
+		unsigned long timeout = jiffies +
+			msecs_to_jiffies(SDIO_READ_CIS_TIMEOUT_MS);
+
+		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) {
+				if (time_after(jiffies, timeout))
+					break;
+				/* warn about unknown tuples */
+				pr_warn_ratelimited("%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/drivers/mmc/core/sdio_cis.h b/drivers/mmc/core/sdio_cis.h
new file mode 100644
index 000000000..16aa563fa
--- /dev/null
+++ b/drivers/mmc/core/sdio_cis.h
@@ -0,0 +1,26 @@
+/*
+ * 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
+
+struct mmc_card;
+struct sdio_func;
+
+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/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
new file mode 100644
index 000000000..ed2d8c48e
--- /dev/null
+++ b/drivers/mmc/core/sdio_io.c
@@ -0,0 +1,804 @@
+/*
+ *  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"
+#include "core.h"
+#include "card.h"
+#include "host.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)
+{
+	if (WARN_ON(!func))
+		return;
+
+	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)
+{
+	if (WARN_ON(!func))
+		return;
+
+	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;
+
+	if (!func)
+		return -EINVAL;
+
+	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;
+
+	if (!func)
+		return -EINVAL;
+
+	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 =	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;
+
+	if (!func || (func->num > 7))
+		return -EINVAL;
+
+	/* 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 and the maximum for IO_RW_EXTENDED of 511 blocks. */
+		max_blocks = min(func->card->host->max_blk_count, 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;
+
+	if (!func) {
+		if (err_ret)
+			*err_ret = -EINVAL;
+		return 0xFF;
+	}
+
+	ret = mmc_io_rw_direct(func->card, 0, func->num, addr, 0, &val);
+	if (err_ret)
+		*err_ret = ret;
+	if (ret)
+		return 0xFF;
+
+	return val;
+}
+EXPORT_SYMBOL_GPL(sdio_readb);
+
+/**
+ *	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;
+
+	if (!func) {
+		if (err_ret)
+			*err_ret = -EINVAL;
+		return;
+	}
+
+	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)
+		return 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;
+
+	ret = sdio_memcpy_fromio(func, func->tmpbuf, addr, 2);
+	if (err_ret)
+		*err_ret = ret;
+	if (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;
+
+	ret = sdio_memcpy_fromio(func, func->tmpbuf, addr, 4);
+	if (err_ret)
+		*err_ret = ret;
+	if (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;
+
+	if (!func) {
+		if (err_ret)
+			*err_ret = -EINVAL;
+		return 0xFF;
+	}
+
+	ret = mmc_io_rw_direct(func->card, 0, 0, addr, 0, &val);
+	if (err_ret)
+		*err_ret = ret;
+	if (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;
+
+	if (!func) {
+		if (err_ret)
+			*err_ret = -EINVAL;
+		return;
+	}
+
+	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)
+{
+	if (!func)
+		return 0;
+
+	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;
+
+	if (!func)
+		return -EINVAL;
+
+	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);
+
+/**
+ *	sdio_retune_crc_disable - temporarily disable retuning on CRC errors
+ *	@func: SDIO function attached to host
+ *
+ *	If the SDIO card is known to be in a state where it might produce
+ *	CRC errors on the bus in response to commands (like if we know it is
+ *	transitioning between power states), an SDIO function driver can
+ *	call this function to temporarily disable the SD/MMC core behavior of
+ *	triggering an automatic retuning.
+ *
+ *	This function should be called while the host is claimed and the host
+ *	should remain claimed until sdio_retune_crc_enable() is called.
+ *	Specifically, the expected sequence of calls is:
+ *	- sdio_claim_host()
+ *	- sdio_retune_crc_disable()
+ *	- some number of calls like sdio_writeb() and sdio_readb()
+ *	- sdio_retune_crc_enable()
+ *	- sdio_release_host()
+ */
+void sdio_retune_crc_disable(struct sdio_func *func)
+{
+	func->card->host->retune_crc_disable = true;
+}
+EXPORT_SYMBOL_GPL(sdio_retune_crc_disable);
+
+/**
+ *	sdio_retune_crc_enable - re-enable retuning on CRC errors
+ *	@func: SDIO function attached to host
+ *
+ *	This is the compement to sdio_retune_crc_disable().
+ */
+void sdio_retune_crc_enable(struct sdio_func *func)
+{
+	func->card->host->retune_crc_disable = false;
+}
+EXPORT_SYMBOL_GPL(sdio_retune_crc_enable);
+
+/**
+ *	sdio_retune_hold_now - start deferring retuning requests till release
+ *	@func: SDIO function attached to host
+ *
+ *	This function can be called if it's currently a bad time to do
+ *	a retune of the SDIO card.  Retune requests made during this time
+ *	will be held and we'll actually do the retune sometime after the
+ *	release.
+ *
+ *	This function could be useful if an SDIO card is in a power state
+ *	where it can respond to a small subset of commands that doesn't
+ *	include the retuning command.  Care should be taken when using
+ *	this function since (presumably) the retuning request we might be
+ *	deferring was made for a good reason.
+ *
+ *	This function should be called while the host is claimed.
+ */
+void sdio_retune_hold_now(struct sdio_func *func)
+{
+	mmc_retune_hold_now(func->card->host);
+}
+EXPORT_SYMBOL_GPL(sdio_retune_hold_now);
+
+/**
+ *	sdio_retune_release - signal that it's OK to retune now
+ *	@func: SDIO function attached to host
+ *
+ *	This is the complement to sdio_retune_hold_now().  Calling this
+ *	function won't make a retune happen right away but will allow
+ *	them to be scheduled normally.
+ *
+ *	This function should be called while the host is claimed.
+ */
+void sdio_retune_release(struct sdio_func *func)
+{
+	mmc_retune_release(func->card->host);
+}
+EXPORT_SYMBOL_GPL(sdio_retune_release);
diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c
new file mode 100644
index 000000000..d206f2de8
--- /dev/null
+++ b/drivers/mmc/core/sdio_irq.c
@@ -0,0 +1,366 @@
+/*
+ * 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 <uapi/linux/sched/types.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"
+#include "core.h"
+#include "card.h"
+
+static int process_sdio_pending_irqs(struct mmc_host *host)
+{
+	struct mmc_card *card = host->card;
+	int i, ret, count;
+	bool sdio_irq_pending = host->sdio_irq_pending;
+	unsigned char pending;
+	struct sdio_func *func;
+
+	/* Don't process SDIO IRQs if the card is suspended. */
+	if (mmc_card_suspended(card))
+		return 0;
+
+	/* Clear the flag to indicate that we have processed the IRQ. */
+	host->sdio_irq_pending = false;
+
+	/*
+	 * 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 && 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;
+	}
+
+	if (pending && mmc_card_broken_irq_polling(card) &&
+	    !(host->caps & MMC_CAP_SDIO_IRQ)) {
+		unsigned char dummy;
+
+		/* A fake interrupt could be created when we poll SDIO_CCCR_INTx
+		 * register with a Marvell SD8797 card. A dummy CMD52 read to
+		 * function 0 register 0xff can avoid this.
+		 */
+		mmc_io_rw_direct(card, 0, 0, 0xff, 0, &dummy);
+	}
+
+	count = 0;
+	for (i = 1; i <= 7; i++) {
+		if (pending & (1 << i)) {
+			func = card->sdio_func[i - 1];
+			if (!func) {
+				pr_warn("%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_warn("%s: pending IRQ with no handler\n",
+					sdio_func_id(func));
+				ret = -EINVAL;
+			}
+		}
+	}
+
+	if (count)
+		return count;
+
+	return ret;
+}
+
+void sdio_run_irqs(struct mmc_host *host)
+{
+	mmc_claim_host(host);
+	if (host->sdio_irqs) {
+		process_sdio_pending_irqs(host);
+		if (host->ops->ack_sdio_irq)
+			host->ops->ack_sdio_irq(host);
+	}
+	mmc_release_host(host);
+}
+EXPORT_SYMBOL_GPL(sdio_run_irqs);
+
+void sdio_irq_work(struct work_struct *work)
+{
+	struct mmc_host *host =
+		container_of(work, struct mmc_host, sdio_irq_work.work);
+
+	sdio_run_irqs(host);
+}
+
+void sdio_signal_irq(struct mmc_host *host)
+{
+	host->sdio_irq_pending = true;
+	queue_delayed_work(system_wq, &host->sdio_irq_work, 0);
+}
+EXPORT_SYMBOL_GPL(sdio_signal_irq);
+
+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, NULL,
+				       &host->sdio_irq_thread_abort);
+		if (ret)
+			break;
+		ret = process_sdio_pending_irqs(host);
+		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)
+			host->ops->enable_sdio_irq(host, 1);
+		if (!kthread_should_stop())
+			schedule_timeout(period);
+		set_current_state(TASK_RUNNING);
+	} while (!kthread_should_stop());
+
+	if (host->caps & MMC_CAP_SDIO_IRQ)
+		host->ops->enable_sdio_irq(host, 0);
+
+	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++) {
+		if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) {
+			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;
+			}
+		} else if (host->caps & MMC_CAP_SDIO_IRQ) {
+			host->ops->enable_sdio_irq(host, 1);
+		}
+	}
+
+	return 0;
+}
+
+static int sdio_card_irq_put(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+
+	WARN_ON(!host->claimed);
+
+	if (host->sdio_irqs < 1)
+		return -EINVAL;
+
+	if (!--host->sdio_irqs) {
+		if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) {
+			atomic_set(&host->sdio_irq_thread_abort, 1);
+			kthread_stop(host->sdio_irq_thread);
+		} else if (host->caps & MMC_CAP_SDIO_IRQ) {
+			host->ops->enable_sdio_irq(host, 0);
+		}
+	}
+
+	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 should not
+ *	call sdio_claim_host() or sdio_release_host().
+ */
+int sdio_claim_irq(struct sdio_func *func, sdio_irq_handler_t *handler)
+{
+	int ret;
+	unsigned char reg;
+
+	if (!func)
+		return -EINVAL;
+
+	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;
+
+	if (!func)
+		return -EINVAL;
+
+	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/drivers/mmc/core/sdio_ops.c b/drivers/mmc/core/sdio_ops.c
new file mode 100644
index 000000000..abaaba385
--- /dev/null
+++ b/drivers/mmc/core/sdio_ops.c
@@ -0,0 +1,216 @@
+/*
+ *  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 = {};
+	int i, err = 0;
+
+	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 = {};
+	int err;
+
+	if (fn > 7)
+		return -EINVAL;
+
+	/* 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)
+{
+	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 = {};
+	struct mmc_command cmd = {};
+	struct mmc_data data = {};
+	struct scatterlist sg, *sg_ptr;
+	struct sg_table sgtable;
+	unsigned int nents, left_size, i;
+	unsigned int seg_size = card->host->max_seg_size;
+
+	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;
+
+	left_size = data.blksz * data.blocks;
+	nents = DIV_ROUND_UP(left_size, seg_size);
+	if (nents > 1) {
+		if (sg_alloc_table(&sgtable, nents, GFP_KERNEL))
+			return -ENOMEM;
+
+		data.sg = sgtable.sgl;
+		data.sg_len = nents;
+
+		for_each_sg(data.sg, sg_ptr, data.sg_len, i) {
+			sg_set_buf(sg_ptr, buf + i * seg_size,
+				   min(seg_size, left_size));
+			left_size -= seg_size;
+		}
+	} else {
+		data.sg = &sg;
+		data.sg_len = 1;
+
+		sg_init_one(&sg, buf, left_size);
+	}
+
+	mmc_set_data_timeout(&data, card);
+
+	mmc_wait_for_req(card->host, &mrq);
+
+	if (nents > 1)
+		sg_free_table(&sgtable);
+
+	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;
+
+	return mmc_io_rw_direct_host(host, 1, 0, SDIO_CCCR_ABORT, abort, NULL);
+}
+
diff --git a/drivers/mmc/core/sdio_ops.h b/drivers/mmc/core/sdio_ops.h
new file mode 100644
index 000000000..96945cafb
--- /dev/null
+++ b/drivers/mmc/core/sdio_ops.h
@@ -0,0 +1,43 @@
+/*
+ *  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
+
+#include <linux/types.h>
+#include <linux/mmc/sdio.h>
+
+struct mmc_host;
+struct mmc_card;
+struct work_struct;
+
+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);
+unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz);
+void sdio_irq_work(struct work_struct *work);
+
+static inline bool sdio_is_io_busy(u32 opcode, u32 arg)
+{
+	u32 addr;
+
+	addr = (arg >> 9) & 0x1FFFF;
+
+	return (opcode == SD_IO_RW_EXTENDED ||
+		(opcode == SD_IO_RW_DIRECT &&
+		!(addr == SDIO_CCCR_ABORT || addr == SDIO_CCCR_SUSPEND)));
+}
+
+#endif
+
diff --git a/drivers/mmc/core/sdio_uart.c b/drivers/mmc/core/sdio_uart.c
new file mode 100644
index 000000000..25e113001
--- /dev/null
+++ b/drivers/mmc/core/sdio_uart.c
@@ -0,0 +1,1187 @@
+/*
+ * SDIO UART/GPS driver
+ *
+ * Based on drivers/serial/8250.c and drivers/serial/serial_core.c
+ * by Russell King.
+ *
+ * Author:	Nicolas Pitre
+ * Created:	June 15, 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.
+ */
+
+/*
+ * Note: Although this driver assumes a 16550A-like UART implementation,
+ * it is not possible to leverage the common 8250/16550 driver, nor the
+ * core UART infrastructure, as they assumes direct access to the hardware
+ * registers, often under a spinlock.  This is not possible in the SDIO
+ * context as SDIO access functions must be able to sleep.
+ *
+ * Because we need to lock the SDIO host to ensure an exclusive access to
+ * the card, we simply rely on that lock to also prevent and serialize
+ * concurrent access to the same port.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mutex.h>
+#include <linux/seq_file.h>
+#include <linux/serial_reg.h>
+#include <linux/circ_buf.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/kfifo.h>
+#include <linux/slab.h>
+
+#include <linux/mmc/core.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/sdio_func.h>
+#include <linux/mmc/sdio_ids.h>
+
+
+#define UART_NR		8	/* Number of UARTs this driver can handle */
+
+
+#define FIFO_SIZE	PAGE_SIZE
+#define WAKEUP_CHARS	256
+
+struct uart_icount {
+	__u32	cts;
+	__u32	dsr;
+	__u32	rng;
+	__u32	dcd;
+	__u32	rx;
+	__u32	tx;
+	__u32	frame;
+	__u32	overrun;
+	__u32	parity;
+	__u32	brk;
+};
+
+struct sdio_uart_port {
+	struct tty_port		port;
+	unsigned int		index;
+	struct sdio_func	*func;
+	struct mutex		func_lock;
+	struct task_struct	*in_sdio_uart_irq;
+	unsigned int		regs_offset;
+	struct kfifo		xmit_fifo;
+	spinlock_t		write_lock;
+	struct uart_icount	icount;
+	unsigned int		uartclk;
+	unsigned int		mctrl;
+	unsigned int		rx_mctrl;
+	unsigned int		read_status_mask;
+	unsigned int		ignore_status_mask;
+	unsigned char		x_char;
+	unsigned char           ier;
+	unsigned char           lcr;
+};
+
+static struct sdio_uart_port *sdio_uart_table[UART_NR];
+static DEFINE_SPINLOCK(sdio_uart_table_lock);
+
+static int sdio_uart_add_port(struct sdio_uart_port *port)
+{
+	int index, ret = -EBUSY;
+
+	mutex_init(&port->func_lock);
+	spin_lock_init(&port->write_lock);
+	if (kfifo_alloc(&port->xmit_fifo, FIFO_SIZE, GFP_KERNEL))
+		return -ENOMEM;
+
+	spin_lock(&sdio_uart_table_lock);
+	for (index = 0; index < UART_NR; index++) {
+		if (!sdio_uart_table[index]) {
+			port->index = index;
+			sdio_uart_table[index] = port;
+			ret = 0;
+			break;
+		}
+	}
+	spin_unlock(&sdio_uart_table_lock);
+
+	return ret;
+}
+
+static struct sdio_uart_port *sdio_uart_port_get(unsigned index)
+{
+	struct sdio_uart_port *port;
+
+	if (index >= UART_NR)
+		return NULL;
+
+	spin_lock(&sdio_uart_table_lock);
+	port = sdio_uart_table[index];
+	if (port)
+		tty_port_get(&port->port);
+	spin_unlock(&sdio_uart_table_lock);
+
+	return port;
+}
+
+static void sdio_uart_port_put(struct sdio_uart_port *port)
+{
+	tty_port_put(&port->port);
+}
+
+static void sdio_uart_port_remove(struct sdio_uart_port *port)
+{
+	struct sdio_func *func;
+
+	spin_lock(&sdio_uart_table_lock);
+	sdio_uart_table[port->index] = NULL;
+	spin_unlock(&sdio_uart_table_lock);
+
+	/*
+	 * We're killing a port that potentially still is in use by
+	 * the tty layer. Be careful to prevent any further access
+	 * to the SDIO function and arrange for the tty layer to
+	 * give up on that port ASAP.
+	 * Beware: the lock ordering is critical.
+	 */
+	mutex_lock(&port->port.mutex);
+	mutex_lock(&port->func_lock);
+	func = port->func;
+	sdio_claim_host(func);
+	port->func = NULL;
+	mutex_unlock(&port->func_lock);
+	/* tty_hangup is async so is this safe as is ?? */
+	tty_port_tty_hangup(&port->port, false);
+	mutex_unlock(&port->port.mutex);
+	sdio_release_irq(func);
+	sdio_disable_func(func);
+	sdio_release_host(func);
+
+	sdio_uart_port_put(port);
+}
+
+static int sdio_uart_claim_func(struct sdio_uart_port *port)
+{
+	mutex_lock(&port->func_lock);
+	if (unlikely(!port->func)) {
+		mutex_unlock(&port->func_lock);
+		return -ENODEV;
+	}
+	if (likely(port->in_sdio_uart_irq != current))
+		sdio_claim_host(port->func);
+	mutex_unlock(&port->func_lock);
+	return 0;
+}
+
+static inline void sdio_uart_release_func(struct sdio_uart_port *port)
+{
+	if (likely(port->in_sdio_uart_irq != current))
+		sdio_release_host(port->func);
+}
+
+static inline unsigned int sdio_in(struct sdio_uart_port *port, int offset)
+{
+	unsigned char c;
+	c = sdio_readb(port->func, port->regs_offset + offset, NULL);
+	return c;
+}
+
+static inline void sdio_out(struct sdio_uart_port *port, int offset, int value)
+{
+	sdio_writeb(port->func, value, port->regs_offset + offset, NULL);
+}
+
+static unsigned int sdio_uart_get_mctrl(struct sdio_uart_port *port)
+{
+	unsigned char status;
+	unsigned int ret;
+
+	/* FIXME: What stops this losing the delta bits and breaking
+	   sdio_uart_check_modem_status ? */
+	status = sdio_in(port, UART_MSR);
+
+	ret = 0;
+	if (status & UART_MSR_DCD)
+		ret |= TIOCM_CAR;
+	if (status & UART_MSR_RI)
+		ret |= TIOCM_RNG;
+	if (status & UART_MSR_DSR)
+		ret |= TIOCM_DSR;
+	if (status & UART_MSR_CTS)
+		ret |= TIOCM_CTS;
+	return ret;
+}
+
+static void sdio_uart_write_mctrl(struct sdio_uart_port *port,
+				  unsigned int mctrl)
+{
+	unsigned char mcr = 0;
+
+	if (mctrl & TIOCM_RTS)
+		mcr |= UART_MCR_RTS;
+	if (mctrl & TIOCM_DTR)
+		mcr |= UART_MCR_DTR;
+	if (mctrl & TIOCM_OUT1)
+		mcr |= UART_MCR_OUT1;
+	if (mctrl & TIOCM_OUT2)
+		mcr |= UART_MCR_OUT2;
+	if (mctrl & TIOCM_LOOP)
+		mcr |= UART_MCR_LOOP;
+
+	sdio_out(port, UART_MCR, mcr);
+}
+
+static inline void sdio_uart_update_mctrl(struct sdio_uart_port *port,
+					  unsigned int set, unsigned int clear)
+{
+	unsigned int old;
+
+	old = port->mctrl;
+	port->mctrl = (old & ~clear) | set;
+	if (old != port->mctrl)
+		sdio_uart_write_mctrl(port, port->mctrl);
+}
+
+#define sdio_uart_set_mctrl(port, x)	sdio_uart_update_mctrl(port, x, 0)
+#define sdio_uart_clear_mctrl(port, x)	sdio_uart_update_mctrl(port, 0, x)
+
+static void sdio_uart_change_speed(struct sdio_uart_port *port,
+				   struct ktermios *termios,
+				   struct ktermios *old)
+{
+	unsigned char cval, fcr = 0;
+	unsigned int baud, quot;
+
+	switch (termios->c_cflag & CSIZE) {
+	case CS5:
+		cval = UART_LCR_WLEN5;
+		break;
+	case CS6:
+		cval = UART_LCR_WLEN6;
+		break;
+	case CS7:
+		cval = UART_LCR_WLEN7;
+		break;
+	default:
+	case CS8:
+		cval = UART_LCR_WLEN8;
+		break;
+	}
+
+	if (termios->c_cflag & CSTOPB)
+		cval |= UART_LCR_STOP;
+	if (termios->c_cflag & PARENB)
+		cval |= UART_LCR_PARITY;
+	if (!(termios->c_cflag & PARODD))
+		cval |= UART_LCR_EPAR;
+
+	for (;;) {
+		baud = tty_termios_baud_rate(termios);
+		if (baud == 0)
+			baud = 9600;  /* Special case: B0 rate. */
+		if (baud <= port->uartclk)
+			break;
+		/*
+		 * Oops, the quotient was zero.  Try again with the old
+		 * baud rate if possible, otherwise default to 9600.
+		 */
+		termios->c_cflag &= ~CBAUD;
+		if (old) {
+			termios->c_cflag |= old->c_cflag & CBAUD;
+			old = NULL;
+		} else
+			termios->c_cflag |= B9600;
+	}
+	quot = (2 * port->uartclk + baud) / (2 * baud);
+
+	if (baud < 2400)
+		fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
+	else
+		fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10;
+
+	port->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
+	if (termios->c_iflag & INPCK)
+		port->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
+	if (termios->c_iflag & (BRKINT | PARMRK))
+		port->read_status_mask |= UART_LSR_BI;
+
+	/*
+	 * Characters to ignore
+	 */
+	port->ignore_status_mask = 0;
+	if (termios->c_iflag & IGNPAR)
+		port->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
+	if (termios->c_iflag & IGNBRK) {
+		port->ignore_status_mask |= UART_LSR_BI;
+		/*
+		 * If we're ignoring parity and break indicators,
+		 * ignore overruns too (for real raw support).
+		 */
+		if (termios->c_iflag & IGNPAR)
+			port->ignore_status_mask |= UART_LSR_OE;
+	}
+
+	/*
+	 * ignore all characters if CREAD is not set
+	 */
+	if ((termios->c_cflag & CREAD) == 0)
+		port->ignore_status_mask |= UART_LSR_DR;
+
+	/*
+	 * CTS flow control flag and modem status interrupts
+	 */
+	port->ier &= ~UART_IER_MSI;
+	if ((termios->c_cflag & CRTSCTS) || !(termios->c_cflag & CLOCAL))
+		port->ier |= UART_IER_MSI;
+
+	port->lcr = cval;
+
+	sdio_out(port, UART_IER, port->ier);
+	sdio_out(port, UART_LCR, cval | UART_LCR_DLAB);
+	sdio_out(port, UART_DLL, quot & 0xff);
+	sdio_out(port, UART_DLM, quot >> 8);
+	sdio_out(port, UART_LCR, cval);
+	sdio_out(port, UART_FCR, fcr);
+
+	sdio_uart_write_mctrl(port, port->mctrl);
+}
+
+static void sdio_uart_start_tx(struct sdio_uart_port *port)
+{
+	if (!(port->ier & UART_IER_THRI)) {
+		port->ier |= UART_IER_THRI;
+		sdio_out(port, UART_IER, port->ier);
+	}
+}
+
+static void sdio_uart_stop_tx(struct sdio_uart_port *port)
+{
+	if (port->ier & UART_IER_THRI) {
+		port->ier &= ~UART_IER_THRI;
+		sdio_out(port, UART_IER, port->ier);
+	}
+}
+
+static void sdio_uart_stop_rx(struct sdio_uart_port *port)
+{
+	port->ier &= ~UART_IER_RLSI;
+	port->read_status_mask &= ~UART_LSR_DR;
+	sdio_out(port, UART_IER, port->ier);
+}
+
+static void sdio_uart_receive_chars(struct sdio_uart_port *port,
+				    unsigned int *status)
+{
+	unsigned int ch, flag;
+	int max_count = 256;
+
+	do {
+		ch = sdio_in(port, UART_RX);
+		flag = TTY_NORMAL;
+		port->icount.rx++;
+
+		if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE |
+					UART_LSR_FE | UART_LSR_OE))) {
+			/*
+			 * For statistics only
+			 */
+			if (*status & UART_LSR_BI) {
+				*status &= ~(UART_LSR_FE | UART_LSR_PE);
+				port->icount.brk++;
+			} else if (*status & UART_LSR_PE)
+				port->icount.parity++;
+			else if (*status & UART_LSR_FE)
+				port->icount.frame++;
+			if (*status & UART_LSR_OE)
+				port->icount.overrun++;
+
+			/*
+			 * Mask off conditions which should be ignored.
+			 */
+			*status &= port->read_status_mask;
+			if (*status & UART_LSR_BI)
+				flag = TTY_BREAK;
+			else if (*status & UART_LSR_PE)
+				flag = TTY_PARITY;
+			else if (*status & UART_LSR_FE)
+				flag = TTY_FRAME;
+		}
+
+		if ((*status & port->ignore_status_mask & ~UART_LSR_OE) == 0)
+			tty_insert_flip_char(&port->port, ch, flag);
+
+		/*
+		 * Overrun is special.  Since it's reported immediately,
+		 * it doesn't affect the current character.
+		 */
+		if (*status & ~port->ignore_status_mask & UART_LSR_OE)
+			tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
+
+		*status = sdio_in(port, UART_LSR);
+	} while ((*status & UART_LSR_DR) && (max_count-- > 0));
+
+	tty_flip_buffer_push(&port->port);
+}
+
+static void sdio_uart_transmit_chars(struct sdio_uart_port *port)
+{
+	struct kfifo *xmit = &port->xmit_fifo;
+	int count;
+	struct tty_struct *tty;
+	u8 iobuf[16];
+	int len;
+
+	if (port->x_char) {
+		sdio_out(port, UART_TX, port->x_char);
+		port->icount.tx++;
+		port->x_char = 0;
+		return;
+	}
+
+	tty = tty_port_tty_get(&port->port);
+
+	if (tty == NULL || !kfifo_len(xmit) ||
+				tty->stopped || tty->hw_stopped) {
+		sdio_uart_stop_tx(port);
+		tty_kref_put(tty);
+		return;
+	}
+
+	len = kfifo_out_locked(xmit, iobuf, 16, &port->write_lock);
+	for (count = 0; count < len; count++) {
+		sdio_out(port, UART_TX, iobuf[count]);
+		port->icount.tx++;
+	}
+
+	len = kfifo_len(xmit);
+	if (len < WAKEUP_CHARS) {
+		tty_wakeup(tty);
+		if (len == 0)
+			sdio_uart_stop_tx(port);
+	}
+	tty_kref_put(tty);
+}
+
+static void sdio_uart_check_modem_status(struct sdio_uart_port *port)
+{
+	int status;
+	struct tty_struct *tty;
+
+	status = sdio_in(port, UART_MSR);
+
+	if ((status & UART_MSR_ANY_DELTA) == 0)
+		return;
+
+	if (status & UART_MSR_TERI)
+		port->icount.rng++;
+	if (status & UART_MSR_DDSR)
+		port->icount.dsr++;
+	if (status & UART_MSR_DDCD) {
+		port->icount.dcd++;
+		/* DCD raise - wake for open */
+		if (status & UART_MSR_DCD)
+			wake_up_interruptible(&port->port.open_wait);
+		else {
+			/* DCD drop - hang up if tty attached */
+			tty_port_tty_hangup(&port->port, false);
+		}
+	}
+	if (status & UART_MSR_DCTS) {
+		port->icount.cts++;
+		tty = tty_port_tty_get(&port->port);
+		if (tty && C_CRTSCTS(tty)) {
+			int cts = (status & UART_MSR_CTS);
+			if (tty->hw_stopped) {
+				if (cts) {
+					tty->hw_stopped = 0;
+					sdio_uart_start_tx(port);
+					tty_wakeup(tty);
+				}
+			} else {
+				if (!cts) {
+					tty->hw_stopped = 1;
+					sdio_uart_stop_tx(port);
+				}
+			}
+		}
+		tty_kref_put(tty);
+	}
+}
+
+/*
+ * This handles the interrupt from one port.
+ */
+static void sdio_uart_irq(struct sdio_func *func)
+{
+	struct sdio_uart_port *port = sdio_get_drvdata(func);
+	unsigned int iir, lsr;
+
+	/*
+	 * In a few places sdio_uart_irq() is called directly instead of
+	 * waiting for the actual interrupt to be raised and the SDIO IRQ
+	 * thread scheduled in order to reduce latency.  However, some
+	 * interaction with the tty core may end up calling us back
+	 * (serial echo, flow control, etc.) through those same places
+	 * causing undesirable effects.  Let's stop the recursion here.
+	 */
+	if (unlikely(port->in_sdio_uart_irq == current))
+		return;
+
+	iir = sdio_in(port, UART_IIR);
+	if (iir & UART_IIR_NO_INT)
+		return;
+
+	port->in_sdio_uart_irq = current;
+	lsr = sdio_in(port, UART_LSR);
+	if (lsr & UART_LSR_DR)
+		sdio_uart_receive_chars(port, &lsr);
+	sdio_uart_check_modem_status(port);
+	if (lsr & UART_LSR_THRE)
+		sdio_uart_transmit_chars(port);
+	port->in_sdio_uart_irq = NULL;
+}
+
+static int uart_carrier_raised(struct tty_port *tport)
+{
+	struct sdio_uart_port *port =
+			container_of(tport, struct sdio_uart_port, port);
+	unsigned int ret = sdio_uart_claim_func(port);
+	if (ret)	/* Missing hardware shouldn't block for carrier */
+		return 1;
+	ret = sdio_uart_get_mctrl(port);
+	sdio_uart_release_func(port);
+	if (ret & TIOCM_CAR)
+		return 1;
+	return 0;
+}
+
+/**
+ *	uart_dtr_rts		-	 port helper to set uart signals
+ *	@tport: tty port to be updated
+ *	@onoff: set to turn on DTR/RTS
+ *
+ *	Called by the tty port helpers when the modem signals need to be
+ *	adjusted during an open, close and hangup.
+ */
+
+static void uart_dtr_rts(struct tty_port *tport, int onoff)
+{
+	struct sdio_uart_port *port =
+			container_of(tport, struct sdio_uart_port, port);
+	int ret = sdio_uart_claim_func(port);
+	if (ret)
+		return;
+	if (onoff == 0)
+		sdio_uart_clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
+	else
+		sdio_uart_set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
+	sdio_uart_release_func(port);
+}
+
+/**
+ *	sdio_uart_activate	-	start up hardware
+ *	@tport: tty port to activate
+ *	@tty: tty bound to this port
+ *
+ *	Activate a tty port. The port locking guarantees us this will be
+ *	run exactly once per set of opens, and if successful will see the
+ *	shutdown method run exactly once to match. Start up and shutdown are
+ *	protected from each other by the internal locking and will not run
+ *	at the same time even during a hangup event.
+ *
+ *	If we successfully start up the port we take an extra kref as we
+ *	will keep it around until shutdown when the kref is dropped.
+ */
+
+static int sdio_uart_activate(struct tty_port *tport, struct tty_struct *tty)
+{
+	struct sdio_uart_port *port =
+			container_of(tport, struct sdio_uart_port, port);
+	int ret;
+
+	/*
+	 * Set the TTY IO error marker - we will only clear this
+	 * once we have successfully opened the port.
+	 */
+	set_bit(TTY_IO_ERROR, &tty->flags);
+
+	kfifo_reset(&port->xmit_fifo);
+
+	ret = sdio_uart_claim_func(port);
+	if (ret)
+		return ret;
+	ret = sdio_enable_func(port->func);
+	if (ret)
+		goto err1;
+	ret = sdio_claim_irq(port->func, sdio_uart_irq);
+	if (ret)
+		goto err2;
+
+	/*
+	 * Clear the FIFO buffers and disable them.
+	 * (they will be reenabled in sdio_change_speed())
+	 */
+	sdio_out(port, UART_FCR, UART_FCR_ENABLE_FIFO);
+	sdio_out(port, UART_FCR, UART_FCR_ENABLE_FIFO |
+		       UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
+	sdio_out(port, UART_FCR, 0);
+
+	/*
+	 * Clear the interrupt registers.
+	 */
+	(void) sdio_in(port, UART_LSR);
+	(void) sdio_in(port, UART_RX);
+	(void) sdio_in(port, UART_IIR);
+	(void) sdio_in(port, UART_MSR);
+
+	/*
+	 * Now, initialize the UART
+	 */
+	sdio_out(port, UART_LCR, UART_LCR_WLEN8);
+
+	port->ier = UART_IER_RLSI|UART_IER_RDI|UART_IER_RTOIE|UART_IER_UUE;
+	port->mctrl = TIOCM_OUT2;
+
+	sdio_uart_change_speed(port, &tty->termios, NULL);
+
+	if (C_BAUD(tty))
+		sdio_uart_set_mctrl(port, TIOCM_RTS | TIOCM_DTR);
+
+	if (C_CRTSCTS(tty))
+		if (!(sdio_uart_get_mctrl(port) & TIOCM_CTS))
+			tty->hw_stopped = 1;
+
+	clear_bit(TTY_IO_ERROR, &tty->flags);
+
+	/* Kick the IRQ handler once while we're still holding the host lock */
+	sdio_uart_irq(port->func);
+
+	sdio_uart_release_func(port);
+	return 0;
+
+err2:
+	sdio_disable_func(port->func);
+err1:
+	sdio_uart_release_func(port);
+	return ret;
+}
+
+/**
+ *	sdio_uart_shutdown	-	stop hardware
+ *	@tport: tty port to shut down
+ *
+ *	Deactivate a tty port. The port locking guarantees us this will be
+ *	run only if a successful matching activate already ran. The two are
+ *	protected from each other by the internal locking and will not run
+ *	at the same time even during a hangup event.
+ */
+
+static void sdio_uart_shutdown(struct tty_port *tport)
+{
+	struct sdio_uart_port *port =
+			container_of(tport, struct sdio_uart_port, port);
+	int ret;
+
+	ret = sdio_uart_claim_func(port);
+	if (ret)
+		return;
+
+	sdio_uart_stop_rx(port);
+
+	/* Disable interrupts from this port */
+	sdio_release_irq(port->func);
+	port->ier = 0;
+	sdio_out(port, UART_IER, 0);
+
+	sdio_uart_clear_mctrl(port, TIOCM_OUT2);
+
+	/* Disable break condition and FIFOs. */
+	port->lcr &= ~UART_LCR_SBC;
+	sdio_out(port, UART_LCR, port->lcr);
+	sdio_out(port, UART_FCR, UART_FCR_ENABLE_FIFO |
+				 UART_FCR_CLEAR_RCVR |
+				 UART_FCR_CLEAR_XMIT);
+	sdio_out(port, UART_FCR, 0);
+
+	sdio_disable_func(port->func);
+
+	sdio_uart_release_func(port);
+}
+
+static void sdio_uart_port_destroy(struct tty_port *tport)
+{
+	struct sdio_uart_port *port =
+		container_of(tport, struct sdio_uart_port, port);
+	kfifo_free(&port->xmit_fifo);
+	kfree(port);
+}
+
+/**
+ *	sdio_uart_install	-	install method
+ *	@driver: the driver in use (sdio_uart in our case)
+ *	@tty: the tty being bound
+ *
+ *	Look up and bind the tty and the driver together. Initialize
+ *	any needed private data (in our case the termios)
+ */
+
+static int sdio_uart_install(struct tty_driver *driver, struct tty_struct *tty)
+{
+	int idx = tty->index;
+	struct sdio_uart_port *port = sdio_uart_port_get(idx);
+	int ret = tty_standard_install(driver, tty);
+
+	if (ret == 0)
+		/* This is the ref sdio_uart_port get provided */
+		tty->driver_data = port;
+	else
+		sdio_uart_port_put(port);
+	return ret;
+}
+
+/**
+ *	sdio_uart_cleanup	-	called on the last tty kref drop
+ *	@tty: the tty being destroyed
+ *
+ *	Called asynchronously when the last reference to the tty is dropped.
+ *	We cannot destroy the tty->driver_data port kref until this point
+ */
+
+static void sdio_uart_cleanup(struct tty_struct *tty)
+{
+	struct sdio_uart_port *port = tty->driver_data;
+	tty->driver_data = NULL;	/* Bug trap */
+	sdio_uart_port_put(port);
+}
+
+/*
+ *	Open/close/hangup is now entirely boilerplate
+ */
+
+static int sdio_uart_open(struct tty_struct *tty, struct file *filp)
+{
+	struct sdio_uart_port *port = tty->driver_data;
+	return tty_port_open(&port->port, tty, filp);
+}
+
+static void sdio_uart_close(struct tty_struct *tty, struct file * filp)
+{
+	struct sdio_uart_port *port = tty->driver_data;
+	tty_port_close(&port->port, tty, filp);
+}
+
+static void sdio_uart_hangup(struct tty_struct *tty)
+{
+	struct sdio_uart_port *port = tty->driver_data;
+	tty_port_hangup(&port->port);
+}
+
+static int sdio_uart_write(struct tty_struct *tty, const unsigned char *buf,
+			   int count)
+{
+	struct sdio_uart_port *port = tty->driver_data;
+	int ret;
+
+	if (!port->func)
+		return -ENODEV;
+
+	ret = kfifo_in_locked(&port->xmit_fifo, buf, count, &port->write_lock);
+	if (!(port->ier & UART_IER_THRI)) {
+		int err = sdio_uart_claim_func(port);
+		if (!err) {
+			sdio_uart_start_tx(port);
+			sdio_uart_irq(port->func);
+			sdio_uart_release_func(port);
+		} else
+			ret = err;
+	}
+
+	return ret;
+}
+
+static int sdio_uart_write_room(struct tty_struct *tty)
+{
+	struct sdio_uart_port *port = tty->driver_data;
+	return FIFO_SIZE - kfifo_len(&port->xmit_fifo);
+}
+
+static int sdio_uart_chars_in_buffer(struct tty_struct *tty)
+{
+	struct sdio_uart_port *port = tty->driver_data;
+	return kfifo_len(&port->xmit_fifo);
+}
+
+static void sdio_uart_send_xchar(struct tty_struct *tty, char ch)
+{
+	struct sdio_uart_port *port = tty->driver_data;
+
+	port->x_char = ch;
+	if (ch && !(port->ier & UART_IER_THRI)) {
+		if (sdio_uart_claim_func(port) != 0)
+			return;
+		sdio_uart_start_tx(port);
+		sdio_uart_irq(port->func);
+		sdio_uart_release_func(port);
+	}
+}
+
+static void sdio_uart_throttle(struct tty_struct *tty)
+{
+	struct sdio_uart_port *port = tty->driver_data;
+
+	if (!I_IXOFF(tty) && !C_CRTSCTS(tty))
+		return;
+
+	if (sdio_uart_claim_func(port) != 0)
+		return;
+
+	if (I_IXOFF(tty)) {
+		port->x_char = STOP_CHAR(tty);
+		sdio_uart_start_tx(port);
+	}
+
+	if (C_CRTSCTS(tty))
+		sdio_uart_clear_mctrl(port, TIOCM_RTS);
+
+	sdio_uart_irq(port->func);
+	sdio_uart_release_func(port);
+}
+
+static void sdio_uart_unthrottle(struct tty_struct *tty)
+{
+	struct sdio_uart_port *port = tty->driver_data;
+
+	if (!I_IXOFF(tty) && !C_CRTSCTS(tty))
+		return;
+
+	if (sdio_uart_claim_func(port) != 0)
+		return;
+
+	if (I_IXOFF(tty)) {
+		if (port->x_char) {
+			port->x_char = 0;
+		} else {
+			port->x_char = START_CHAR(tty);
+			sdio_uart_start_tx(port);
+		}
+	}
+
+	if (C_CRTSCTS(tty))
+		sdio_uart_set_mctrl(port, TIOCM_RTS);
+
+	sdio_uart_irq(port->func);
+	sdio_uart_release_func(port);
+}
+
+static void sdio_uart_set_termios(struct tty_struct *tty,
+						struct ktermios *old_termios)
+{
+	struct sdio_uart_port *port = tty->driver_data;
+	unsigned int cflag = tty->termios.c_cflag;
+
+	if (sdio_uart_claim_func(port) != 0)
+		return;
+
+	sdio_uart_change_speed(port, &tty->termios, old_termios);
+
+	/* Handle transition to B0 status */
+	if ((old_termios->c_cflag & CBAUD) && !(cflag & CBAUD))
+		sdio_uart_clear_mctrl(port, TIOCM_RTS | TIOCM_DTR);
+
+	/* Handle transition away from B0 status */
+	if (!(old_termios->c_cflag & CBAUD) && (cflag & CBAUD)) {
+		unsigned int mask = TIOCM_DTR;
+		if (!(cflag & CRTSCTS) || !tty_throttled(tty))
+			mask |= TIOCM_RTS;
+		sdio_uart_set_mctrl(port, mask);
+	}
+
+	/* Handle turning off CRTSCTS */
+	if ((old_termios->c_cflag & CRTSCTS) && !(cflag & CRTSCTS)) {
+		tty->hw_stopped = 0;
+		sdio_uart_start_tx(port);
+	}
+
+	/* Handle turning on CRTSCTS */
+	if (!(old_termios->c_cflag & CRTSCTS) && (cflag & CRTSCTS)) {
+		if (!(sdio_uart_get_mctrl(port) & TIOCM_CTS)) {
+			tty->hw_stopped = 1;
+			sdio_uart_stop_tx(port);
+		}
+	}
+
+	sdio_uart_release_func(port);
+}
+
+static int sdio_uart_break_ctl(struct tty_struct *tty, int break_state)
+{
+	struct sdio_uart_port *port = tty->driver_data;
+	int result;
+
+	result = sdio_uart_claim_func(port);
+	if (result != 0)
+		return result;
+
+	if (break_state == -1)
+		port->lcr |= UART_LCR_SBC;
+	else
+		port->lcr &= ~UART_LCR_SBC;
+	sdio_out(port, UART_LCR, port->lcr);
+
+	sdio_uart_release_func(port);
+	return 0;
+}
+
+static int sdio_uart_tiocmget(struct tty_struct *tty)
+{
+	struct sdio_uart_port *port = tty->driver_data;
+	int result;
+
+	result = sdio_uart_claim_func(port);
+	if (!result) {
+		result = port->mctrl | sdio_uart_get_mctrl(port);
+		sdio_uart_release_func(port);
+	}
+
+	return result;
+}
+
+static int sdio_uart_tiocmset(struct tty_struct *tty,
+			      unsigned int set, unsigned int clear)
+{
+	struct sdio_uart_port *port = tty->driver_data;
+	int result;
+
+	result = sdio_uart_claim_func(port);
+	if (!result) {
+		sdio_uart_update_mctrl(port, set, clear);
+		sdio_uart_release_func(port);
+	}
+
+	return result;
+}
+
+static int sdio_uart_proc_show(struct seq_file *m, void *v)
+{
+	int i;
+
+	seq_printf(m, "serinfo:1.0 driver%s%s revision:%s\n",
+		       "", "", "");
+	for (i = 0; i < UART_NR; i++) {
+		struct sdio_uart_port *port = sdio_uart_port_get(i);
+		if (port) {
+			seq_printf(m, "%d: uart:SDIO", i);
+			if (capable(CAP_SYS_ADMIN)) {
+				seq_printf(m, " tx:%d rx:%d",
+					      port->icount.tx, port->icount.rx);
+				if (port->icount.frame)
+					seq_printf(m, " fe:%d",
+						      port->icount.frame);
+				if (port->icount.parity)
+					seq_printf(m, " pe:%d",
+						      port->icount.parity);
+				if (port->icount.brk)
+					seq_printf(m, " brk:%d",
+						      port->icount.brk);
+				if (port->icount.overrun)
+					seq_printf(m, " oe:%d",
+						      port->icount.overrun);
+				if (port->icount.cts)
+					seq_printf(m, " cts:%d",
+						      port->icount.cts);
+				if (port->icount.dsr)
+					seq_printf(m, " dsr:%d",
+						      port->icount.dsr);
+				if (port->icount.rng)
+					seq_printf(m, " rng:%d",
+						      port->icount.rng);
+				if (port->icount.dcd)
+					seq_printf(m, " dcd:%d",
+						      port->icount.dcd);
+			}
+			sdio_uart_port_put(port);
+			seq_putc(m, '\n');
+		}
+	}
+	return 0;
+}
+
+static const struct tty_port_operations sdio_uart_port_ops = {
+	.dtr_rts = uart_dtr_rts,
+	.carrier_raised = uart_carrier_raised,
+	.shutdown = sdio_uart_shutdown,
+	.activate = sdio_uart_activate,
+	.destruct = sdio_uart_port_destroy,
+};
+
+static const struct tty_operations sdio_uart_ops = {
+	.open			= sdio_uart_open,
+	.close			= sdio_uart_close,
+	.write			= sdio_uart_write,
+	.write_room		= sdio_uart_write_room,
+	.chars_in_buffer	= sdio_uart_chars_in_buffer,
+	.send_xchar		= sdio_uart_send_xchar,
+	.throttle		= sdio_uart_throttle,
+	.unthrottle		= sdio_uart_unthrottle,
+	.set_termios		= sdio_uart_set_termios,
+	.hangup			= sdio_uart_hangup,
+	.break_ctl		= sdio_uart_break_ctl,
+	.tiocmget		= sdio_uart_tiocmget,
+	.tiocmset		= sdio_uart_tiocmset,
+	.install		= sdio_uart_install,
+	.cleanup		= sdio_uart_cleanup,
+	.proc_show		= sdio_uart_proc_show,
+};
+
+static struct tty_driver *sdio_uart_tty_driver;
+
+static int sdio_uart_probe(struct sdio_func *func,
+			   const struct sdio_device_id *id)
+{
+	struct sdio_uart_port *port;
+	int ret;
+
+	port = kzalloc(sizeof(struct sdio_uart_port), GFP_KERNEL);
+	if (!port)
+		return -ENOMEM;
+
+	if (func->class == SDIO_CLASS_UART) {
+		pr_warn("%s: need info on UART class basic setup\n",
+			sdio_func_id(func));
+		kfree(port);
+		return -ENOSYS;
+	} else if (func->class == SDIO_CLASS_GPS) {
+		/*
+		 * We need tuple 0x91.  It contains SUBTPL_SIOREG
+		 * and SUBTPL_RCVCAPS.
+		 */
+		struct sdio_func_tuple *tpl;
+		for (tpl = func->tuples; tpl; tpl = tpl->next) {
+			if (tpl->code != 0x91)
+				continue;
+			if (tpl->size < 10)
+				continue;
+			if (tpl->data[1] == 0)  /* SUBTPL_SIOREG */
+				break;
+		}
+		if (!tpl) {
+			pr_warn("%s: can't find tuple 0x91 subtuple 0 (SUBTPL_SIOREG) for GPS class\n",
+				sdio_func_id(func));
+			kfree(port);
+			return -EINVAL;
+		}
+		pr_debug("%s: Register ID = 0x%02x, Exp ID = 0x%02x\n",
+		       sdio_func_id(func), tpl->data[2], tpl->data[3]);
+		port->regs_offset = (tpl->data[4] << 0) |
+				    (tpl->data[5] << 8) |
+				    (tpl->data[6] << 16);
+		pr_debug("%s: regs offset = 0x%x\n",
+		       sdio_func_id(func), port->regs_offset);
+		port->uartclk = tpl->data[7] * 115200;
+		if (port->uartclk == 0)
+			port->uartclk = 115200;
+		pr_debug("%s: clk %d baudcode %u 4800-div %u\n",
+		       sdio_func_id(func), port->uartclk,
+		       tpl->data[7], tpl->data[8] | (tpl->data[9] << 8));
+	} else {
+		kfree(port);
+		return -EINVAL;
+	}
+
+	port->func = func;
+	sdio_set_drvdata(func, port);
+	tty_port_init(&port->port);
+	port->port.ops = &sdio_uart_port_ops;
+
+	ret = sdio_uart_add_port(port);
+	if (ret) {
+		kfree(port);
+	} else {
+		struct device *dev;
+		dev = tty_port_register_device(&port->port,
+				sdio_uart_tty_driver, port->index, &func->dev);
+		if (IS_ERR(dev)) {
+			sdio_uart_port_remove(port);
+			ret = PTR_ERR(dev);
+		}
+	}
+
+	return ret;
+}
+
+static void sdio_uart_remove(struct sdio_func *func)
+{
+	struct sdio_uart_port *port = sdio_get_drvdata(func);
+
+	tty_unregister_device(sdio_uart_tty_driver, port->index);
+	sdio_uart_port_remove(port);
+}
+
+static const struct sdio_device_id sdio_uart_ids[] = {
+	{ SDIO_DEVICE_CLASS(SDIO_CLASS_UART)		},
+	{ SDIO_DEVICE_CLASS(SDIO_CLASS_GPS)		},
+	{ /* end: all zeroes */				},
+};
+
+MODULE_DEVICE_TABLE(sdio, sdio_uart_ids);
+
+static struct sdio_driver sdio_uart_driver = {
+	.probe		= sdio_uart_probe,
+	.remove		= sdio_uart_remove,
+	.name		= "sdio_uart",
+	.id_table	= sdio_uart_ids,
+};
+
+static int __init sdio_uart_init(void)
+{
+	int ret;
+	struct tty_driver *tty_drv;
+
+	sdio_uart_tty_driver = tty_drv = alloc_tty_driver(UART_NR);
+	if (!tty_drv)
+		return -ENOMEM;
+
+	tty_drv->driver_name = "sdio_uart";
+	tty_drv->name =   "ttySDIO";
+	tty_drv->major = 0;  /* dynamically allocated */
+	tty_drv->minor_start = 0;
+	tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
+	tty_drv->subtype = SERIAL_TYPE_NORMAL;
+	tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+	tty_drv->init_termios = tty_std_termios;
+	tty_drv->init_termios.c_cflag = B4800 | CS8 | CREAD | HUPCL | CLOCAL;
+	tty_drv->init_termios.c_ispeed = 4800;
+	tty_drv->init_termios.c_ospeed = 4800;
+	tty_set_operations(tty_drv, &sdio_uart_ops);
+
+	ret = tty_register_driver(tty_drv);
+	if (ret)
+		goto err1;
+
+	ret = sdio_register_driver(&sdio_uart_driver);
+	if (ret)
+		goto err2;
+
+	return 0;
+
+err2:
+	tty_unregister_driver(tty_drv);
+err1:
+	put_tty_driver(tty_drv);
+	return ret;
+}
+
+static void __exit sdio_uart_exit(void)
+{
+	sdio_unregister_driver(&sdio_uart_driver);
+	tty_unregister_driver(sdio_uart_tty_driver);
+	put_tty_driver(sdio_uart_tty_driver);
+}
+
+module_init(sdio_uart_init);
+module_exit(sdio_uart_exit);
+
+MODULE_AUTHOR("Nicolas Pitre");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mmc/core/slot-gpio.c b/drivers/mmc/core/slot-gpio.c
new file mode 100644
index 000000000..86803a3a0
--- /dev/null
+++ b/drivers/mmc/core/slot-gpio.c
@@ -0,0 +1,344 @@
+/*
+ * 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/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/jiffies.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/slot-gpio.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include "slot-gpio.h"
+
+struct mmc_gpio {
+	struct gpio_desc *ro_gpio;
+	struct gpio_desc *cd_gpio;
+	bool override_ro_active_level;
+	bool override_cd_active_level;
+	irqreturn_t (*cd_gpio_isr)(int irq, void *dev_id);
+	char *ro_label;
+	u32 cd_debounce_delay_ms;
+	char cd_label[];
+};
+
+static irqreturn_t mmc_gpio_cd_irqt(int irq, void *dev_id)
+{
+	/* Schedule a card detection after a debounce timeout */
+	struct mmc_host *host = dev_id;
+	struct mmc_gpio *ctx = host->slot.handler_priv;
+
+	host->trigger_card_event = true;
+	mmc_detect_change(host, msecs_to_jiffies(ctx->cd_debounce_delay_ms));
+
+	return IRQ_HANDLED;
+}
+
+int mmc_gpio_alloc(struct mmc_host *host)
+{
+	size_t len = strlen(dev_name(host->parent)) + 4;
+	struct mmc_gpio *ctx = devm_kzalloc(host->parent,
+				sizeof(*ctx) + 2 * len,	GFP_KERNEL);
+
+	if (ctx) {
+		ctx->ro_label = ctx->cd_label + len;
+		ctx->cd_debounce_delay_ms = 200;
+		snprintf(ctx->cd_label, len, "%s cd", dev_name(host->parent));
+		snprintf(ctx->ro_label, len, "%s ro", dev_name(host->parent));
+		host->slot.handler_priv = ctx;
+		host->slot.cd_irq = -EINVAL;
+	}
+
+	return ctx ? 0 : -ENOMEM;
+}
+
+int mmc_gpio_get_ro(struct mmc_host *host)
+{
+	struct mmc_gpio *ctx = host->slot.handler_priv;
+
+	if (!ctx || !ctx->ro_gpio)
+		return -ENOSYS;
+
+	if (ctx->override_ro_active_level)
+		return !gpiod_get_raw_value_cansleep(ctx->ro_gpio) ^
+			!!(host->caps2 & MMC_CAP2_RO_ACTIVE_HIGH);
+
+	return gpiod_get_value_cansleep(ctx->ro_gpio);
+}
+EXPORT_SYMBOL(mmc_gpio_get_ro);
+
+int mmc_gpio_get_cd(struct mmc_host *host)
+{
+	struct mmc_gpio *ctx = host->slot.handler_priv;
+	int cansleep;
+
+	if (!ctx || !ctx->cd_gpio)
+		return -ENOSYS;
+
+	cansleep = gpiod_cansleep(ctx->cd_gpio);
+	if (ctx->override_cd_active_level) {
+		int value = cansleep ?
+				gpiod_get_raw_value_cansleep(ctx->cd_gpio) :
+				gpiod_get_raw_value(ctx->cd_gpio);
+		return !value ^ !!(host->caps2 & MMC_CAP2_CD_ACTIVE_HIGH);
+	}
+
+	return cansleep ?
+		gpiod_get_value_cansleep(ctx->cd_gpio) :
+		gpiod_get_value(ctx->cd_gpio);
+}
+EXPORT_SYMBOL(mmc_gpio_get_cd);
+
+/**
+ * mmc_gpio_request_ro - request a gpio for write-protection
+ * @host: mmc host
+ * @gpio: gpio number requested
+ *
+ * As devm_* managed functions are used in mmc_gpio_request_ro(), client
+ * drivers do not need to worry about freeing up memory.
+ *
+ * Returns zero on success, else an error.
+ */
+int mmc_gpio_request_ro(struct mmc_host *host, unsigned int gpio)
+{
+	struct mmc_gpio *ctx = host->slot.handler_priv;
+	int ret;
+
+	if (!gpio_is_valid(gpio))
+		return -EINVAL;
+
+	ret = devm_gpio_request_one(host->parent, gpio, GPIOF_DIR_IN,
+				    ctx->ro_label);
+	if (ret < 0)
+		return ret;
+
+	ctx->override_ro_active_level = true;
+	ctx->ro_gpio = gpio_to_desc(gpio);
+
+	return 0;
+}
+EXPORT_SYMBOL(mmc_gpio_request_ro);
+
+void mmc_gpiod_request_cd_irq(struct mmc_host *host)
+{
+	struct mmc_gpio *ctx = host->slot.handler_priv;
+	int irq = -EINVAL;
+	int ret;
+
+	if (host->slot.cd_irq >= 0 || !ctx || !ctx->cd_gpio)
+		return;
+
+	/*
+	 * Do not use IRQ if the platform prefers to poll, e.g., because that
+	 * IRQ number is already used by another unit and cannot be shared.
+	 */
+	if (!(host->caps & MMC_CAP_NEEDS_POLL))
+		irq = gpiod_to_irq(ctx->cd_gpio);
+
+	if (irq >= 0) {
+		if (!ctx->cd_gpio_isr)
+			ctx->cd_gpio_isr = mmc_gpio_cd_irqt;
+		ret = devm_request_threaded_irq(host->parent, irq,
+			NULL, ctx->cd_gpio_isr,
+			IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+			ctx->cd_label, host);
+		if (ret < 0)
+			irq = ret;
+	}
+
+	host->slot.cd_irq = irq;
+
+	if (irq < 0)
+		host->caps |= MMC_CAP_NEEDS_POLL;
+}
+EXPORT_SYMBOL(mmc_gpiod_request_cd_irq);
+
+int mmc_gpio_set_cd_wake(struct mmc_host *host, bool on)
+{
+	int ret = 0;
+
+	if (!(host->caps & MMC_CAP_CD_WAKE) ||
+	    host->slot.cd_irq < 0 ||
+	    on == host->slot.cd_wake_enabled)
+		return 0;
+
+	if (on) {
+		ret = enable_irq_wake(host->slot.cd_irq);
+		host->slot.cd_wake_enabled = !ret;
+	} else {
+		disable_irq_wake(host->slot.cd_irq);
+		host->slot.cd_wake_enabled = false;
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL(mmc_gpio_set_cd_wake);
+
+/* Register an alternate interrupt service routine for
+ * the card-detect GPIO.
+ */
+void mmc_gpio_set_cd_isr(struct mmc_host *host,
+			 irqreturn_t (*isr)(int irq, void *dev_id))
+{
+	struct mmc_gpio *ctx = host->slot.handler_priv;
+
+	WARN_ON(ctx->cd_gpio_isr);
+	ctx->cd_gpio_isr = isr;
+}
+EXPORT_SYMBOL(mmc_gpio_set_cd_isr);
+
+/**
+ * mmc_gpio_request_cd - request a gpio for card-detection
+ * @host: mmc host
+ * @gpio: gpio number requested
+ * @debounce: debounce time in microseconds
+ *
+ * As devm_* managed functions are used in mmc_gpio_request_cd(), client
+ * drivers do not need to worry about freeing up memory.
+ *
+ * If GPIO debouncing is desired, set the debounce parameter to a non-zero
+ * value. The caller is responsible for ensuring that the GPIO driver associated
+ * with the GPIO supports debouncing, otherwise an error will be returned.
+ *
+ * Returns zero on success, else an error.
+ */
+int mmc_gpio_request_cd(struct mmc_host *host, unsigned int gpio,
+			unsigned int debounce)
+{
+	struct mmc_gpio *ctx = host->slot.handler_priv;
+	int ret;
+
+	ret = devm_gpio_request_one(host->parent, gpio, GPIOF_DIR_IN,
+				    ctx->cd_label);
+	if (ret < 0)
+		/*
+		 * don't bother freeing memory. It might still get used by other
+		 * slot functions, in any case it will be freed, when the device
+		 * is destroyed.
+		 */
+		return ret;
+
+	if (debounce) {
+		ret = gpio_set_debounce(gpio, debounce);
+		if (ret < 0)
+			return ret;
+	}
+
+	ctx->override_cd_active_level = true;
+	ctx->cd_gpio = gpio_to_desc(gpio);
+
+	return 0;
+}
+EXPORT_SYMBOL(mmc_gpio_request_cd);
+
+/**
+ * mmc_gpiod_request_cd - request a gpio descriptor for card-detection
+ * @host: mmc host
+ * @con_id: function within the GPIO consumer
+ * @idx: index of the GPIO to obtain in the consumer
+ * @override_active_level: ignore %GPIO_ACTIVE_LOW flag
+ * @debounce: debounce time in microseconds
+ * @gpio_invert: will return whether the GPIO line is inverted or not, set
+ * to NULL to ignore
+ *
+ * Use this function in place of mmc_gpio_request_cd() to use the GPIO
+ * descriptor API.  Note that it must be called prior to mmc_add_host()
+ * otherwise the caller must also call mmc_gpiod_request_cd_irq().
+ *
+ * Returns zero on success, else an error.
+ */
+int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id,
+			 unsigned int idx, bool override_active_level,
+			 unsigned int debounce, bool *gpio_invert)
+{
+	struct mmc_gpio *ctx = host->slot.handler_priv;
+	struct gpio_desc *desc;
+	int ret;
+
+	desc = devm_gpiod_get_index(host->parent, con_id, idx, GPIOD_IN);
+	if (IS_ERR(desc))
+		return PTR_ERR(desc);
+
+	if (debounce) {
+		ret = gpiod_set_debounce(desc, debounce);
+		if (ret < 0)
+			ctx->cd_debounce_delay_ms = debounce / 1000;
+	}
+
+	if (gpio_invert)
+		*gpio_invert = !gpiod_is_active_low(desc);
+
+	ctx->override_cd_active_level = override_active_level;
+	ctx->cd_gpio = desc;
+
+	return 0;
+}
+EXPORT_SYMBOL(mmc_gpiod_request_cd);
+
+bool mmc_can_gpio_cd(struct mmc_host *host)
+{
+	struct mmc_gpio *ctx = host->slot.handler_priv;
+
+	return ctx->cd_gpio ? true : false;
+}
+EXPORT_SYMBOL(mmc_can_gpio_cd);
+
+/**
+ * mmc_gpiod_request_ro - request a gpio descriptor for write protection
+ * @host: mmc host
+ * @con_id: function within the GPIO consumer
+ * @idx: index of the GPIO to obtain in the consumer
+ * @override_active_level: ignore %GPIO_ACTIVE_LOW flag
+ * @debounce: debounce time in microseconds
+ * @gpio_invert: will return whether the GPIO line is inverted or not,
+ * set to NULL to ignore
+ *
+ * Use this function in place of mmc_gpio_request_ro() to use the GPIO
+ * descriptor API.
+ *
+ * Returns zero on success, else an error.
+ */
+int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id,
+			 unsigned int idx, bool override_active_level,
+			 unsigned int debounce, bool *gpio_invert)
+{
+	struct mmc_gpio *ctx = host->slot.handler_priv;
+	struct gpio_desc *desc;
+	int ret;
+
+	desc = devm_gpiod_get_index(host->parent, con_id, idx, GPIOD_IN);
+	if (IS_ERR(desc))
+		return PTR_ERR(desc);
+
+	if (debounce) {
+		ret = gpiod_set_debounce(desc, debounce);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (gpio_invert)
+		*gpio_invert = !gpiod_is_active_low(desc);
+
+	ctx->override_ro_active_level = override_active_level;
+	ctx->ro_gpio = desc;
+
+	return 0;
+}
+EXPORT_SYMBOL(mmc_gpiod_request_ro);
+
+bool mmc_can_gpio_ro(struct mmc_host *host)
+{
+	struct mmc_gpio *ctx = host->slot.handler_priv;
+
+	return ctx->ro_gpio ? true : false;
+}
+EXPORT_SYMBOL(mmc_can_gpio_ro);
diff --git a/drivers/mmc/core/slot-gpio.h b/drivers/mmc/core/slot-gpio.h
new file mode 100644
index 000000000..a06fd843f
--- /dev/null
+++ b/drivers/mmc/core/slot-gpio.h
@@ -0,0 +1,15 @@
+/*
+  * Copyright (C) 2014 Linaro Ltd
+ *
+ * Author: Ulf Hansson <ulf.hansson@linaro.org>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+#ifndef _MMC_CORE_SLOTGPIO_H
+#define _MMC_CORE_SLOTGPIO_H
+
+struct mmc_host;
+
+int mmc_gpio_alloc(struct mmc_host *host);
+
+#endif