diff --git a/marvell/uboot/drivers/mmc/mmc.c b/marvell/uboot/drivers/mmc/mmc.c
new file mode 100644
index 0000000..c62b2a5
--- /dev/null
+++ b/marvell/uboot/drivers/mmc/mmc.c
@@ -0,0 +1,1526 @@
+/*
+ * Copyright 2008, Freescale Semiconductor, Inc
+ * Andy Fleming
+ *
+ * Based vaguely on the Linux code
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <config.h>
+#include <common.h>
+#include <command.h>
+#include <mmc.h>
+#include <part.h>
+#include <malloc.h>
+#include <linux/list.h>
+#include <div64.h>
+#include "mmc_private.h"
+
+/* Set block count limit because of 16 bit register limit on some hardware*/
+#ifndef CONFIG_SYS_MMC_MAX_BLK_COUNT
+#define CONFIG_SYS_MMC_MAX_BLK_COUNT 65535
+#endif
+
+static struct list_head mmc_devices;
+static int cur_dev_num = -1;
+
+int __weak board_mmc_getwp(struct mmc *mmc)
+{
+	return -1;
+}
+
+int mmc_getwp(struct mmc *mmc)
+{
+	int wp;
+
+	wp = board_mmc_getwp(mmc);
+
+	if (wp < 0) {
+		if (mmc->getwp)
+			wp = mmc->getwp(mmc);
+		else
+			wp = 0;
+	}
+
+	return wp;
+}
+
+int __board_mmc_getcd(struct mmc *mmc) {
+	return -1;
+}
+
+int board_mmc_getcd(struct mmc *mmc)__attribute__((weak,
+	alias("__board_mmc_getcd")));
+
+int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
+{
+	int ret;
+
+#ifdef CONFIG_MMC_TRACE
+	int i;
+	u8 *ptr;
+
+	printf("CMD_SEND:%d\n", cmd->cmdidx);
+	printf("\t\tARG\t\t\t 0x%08X\n", cmd->cmdarg);
+	ret = mmc->send_cmd(mmc, cmd, data);
+	switch (cmd->resp_type) {
+		case MMC_RSP_NONE:
+			printf("\t\tMMC_RSP_NONE\n");
+			break;
+		case MMC_RSP_R1:
+			printf("\t\tMMC_RSP_R1,5,6,7 \t 0x%08X \n",
+				cmd->response[0]);
+			break;
+		case MMC_RSP_R1b:
+			printf("\t\tMMC_RSP_R1b\t\t 0x%08X \n",
+				cmd->response[0]);
+			break;
+		case MMC_RSP_R2:
+			printf("\t\tMMC_RSP_R2\t\t 0x%08X \n",
+				cmd->response[0]);
+			printf("\t\t          \t\t 0x%08X \n",
+				cmd->response[1]);
+			printf("\t\t          \t\t 0x%08X \n",
+				cmd->response[2]);
+			printf("\t\t          \t\t 0x%08X \n",
+				cmd->response[3]);
+			printf("\n");
+			printf("\t\t\t\t\tDUMPING DATA\n");
+			for (i = 0; i < 4; i++) {
+				int j;
+				printf("\t\t\t\t\t%03d - ", i*4);
+				ptr = (u8 *)&cmd->response[i];
+				ptr += 3;
+				for (j = 0; j < 4; j++)
+					printf("%02X ", *ptr--);
+				printf("\n");
+			}
+			break;
+		case MMC_RSP_R3:
+			printf("\t\tMMC_RSP_R3,4\t\t 0x%08X \n",
+				cmd->response[0]);
+			break;
+		default:
+			printf("\t\tERROR MMC rsp not supported\n");
+			break;
+	}
+#else
+	ret = mmc->send_cmd(mmc, cmd, data);
+#endif
+	return ret;
+}
+
+int mmc_send_status(struct mmc *mmc, int timeout)
+{
+	struct mmc_cmd cmd;
+	int err, retries = 5;
+#ifdef CONFIG_MMC_TRACE
+	int status;
+#endif
+
+	cmd.cmdidx = MMC_CMD_SEND_STATUS;
+	cmd.resp_type = MMC_RSP_R1;
+	if (!mmc_host_is_spi(mmc))
+		cmd.cmdarg = mmc->rca << 16;
+
+	do {
+		err = mmc_send_cmd(mmc, &cmd, NULL);
+		if (!err) {
+			if ((cmd.response[0] & MMC_STATUS_RDY_FOR_DATA) &&
+			    (cmd.response[0] & MMC_STATUS_CURR_STATE) !=
+			     MMC_STATE_PRG)
+				break;
+			else if (cmd.response[0] & MMC_STATUS_MASK) {
+#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
+				printf("Status Error: 0x%08X\n",
+					cmd.response[0]);
+#endif
+				return COMM_ERR;
+			}
+		} else if (--retries < 0)
+			return err;
+
+		udelay(1000);
+
+	} while (timeout--);
+
+#ifdef CONFIG_MMC_TRACE
+	status = (cmd.response[0] & MMC_STATUS_CURR_STATE) >> 9;
+	printf("CURR STATE:%d\n", status);
+#endif
+	if (timeout <= 0) {
+#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
+		printf("Timeout waiting card ready\n");
+#endif
+		return TIMEOUT;
+	}
+
+	return 0;
+}
+
+int mmc_set_blocklen(struct mmc *mmc, int len)
+{
+	struct mmc_cmd cmd;
+
+	cmd.cmdidx = MMC_CMD_SET_BLOCKLEN;
+	cmd.resp_type = MMC_RSP_R1;
+	cmd.cmdarg = len;
+
+	udelay(1000);
+	return mmc_send_cmd(mmc, &cmd, NULL);
+}
+
+struct mmc *find_mmc_device(int dev_num)
+{
+	struct mmc *m;
+	struct list_head *entry;
+
+	list_for_each(entry, &mmc_devices) {
+		m = list_entry(entry, struct mmc, link);
+
+		if (m->block_dev.dev == dev_num)
+			return m;
+	}
+
+#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
+	printf("MMC Device %d not found\n", dev_num);
+#endif
+
+	return NULL;
+}
+
+static int mmc_read_blocks(struct mmc *mmc, void *dst, lbaint_t start,
+			   lbaint_t blkcnt)
+{
+	struct mmc_cmd cmd;
+	struct mmc_data data;
+
+	if (blkcnt > 1)
+		cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
+	else
+		cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
+
+	if (mmc->high_capacity)
+		cmd.cmdarg = start;
+	else
+		cmd.cmdarg = start * mmc->read_bl_len;
+
+	cmd.resp_type = MMC_RSP_R1;
+
+	data.dest = dst;
+	data.blocks = blkcnt;
+	data.blocksize = mmc->read_bl_len;
+	data.flags = MMC_DATA_READ;
+
+	if (mmc_send_cmd(mmc, &cmd, &data))
+		return 0;
+
+	if (blkcnt > 1) {
+		cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
+		cmd.cmdarg = 0;
+		cmd.resp_type = MMC_RSP_R1b;
+		if (mmc_send_cmd(mmc, &cmd, NULL)) {
+#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
+			printf("mmc fail to send stop cmd\n");
+#endif
+			return 0;
+		}
+	}
+
+	return blkcnt;
+}
+
+static ulong mmc_bread(int dev_num, lbaint_t start, lbaint_t blkcnt, void *dst)
+{
+	lbaint_t cur, blocks_todo = blkcnt;
+
+	if (blkcnt == 0)
+		return 0;
+
+	struct mmc *mmc = find_mmc_device(dev_num);
+	if (!mmc)
+		return 0;
+
+	if ((start + blkcnt) > mmc->block_dev.lba) {
+#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
+		printf("MMC: block number 0x" LBAF " exceeds max(0x" LBAF ")\n",
+			start + blkcnt, mmc->block_dev.lba);
+#endif
+		return 0;
+	}
+
+	if (mmc_set_blocklen(mmc, mmc->read_bl_len))
+		return 0;
+
+	do {
+		cur = (blocks_todo > mmc->b_max) ?  mmc->b_max : blocks_todo;
+		if(mmc_read_blocks(mmc, dst, start, cur) != cur)
+			return 0;
+		blocks_todo -= cur;
+		start += cur;
+		dst += cur * mmc->read_bl_len;
+	} while (blocks_todo > 0);
+
+	return blkcnt;
+}
+
+static int mmc_go_idle(struct mmc *mmc)
+{
+	struct mmc_cmd cmd;
+	int err;
+
+	udelay(1000);
+
+	cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
+	cmd.cmdarg = 0;
+	cmd.resp_type = MMC_RSP_NONE;
+
+	err = mmc_send_cmd(mmc, &cmd, NULL);
+
+	if (err)
+		return err;
+
+	udelay(2000);
+
+	return 0;
+}
+
+static int sd_send_op_cond(struct mmc *mmc)
+{
+	int timeout = 1000;
+	int err;
+	struct mmc_cmd cmd;
+
+	do {
+		cmd.cmdidx = MMC_CMD_APP_CMD;
+		cmd.resp_type = MMC_RSP_R1;
+		cmd.cmdarg = 0;
+
+		err = mmc_send_cmd(mmc, &cmd, NULL);
+
+		if (err)
+			return err;
+
+		cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
+		cmd.resp_type = MMC_RSP_R3;
+
+		/*
+		 * Most cards do not answer if some reserved bits
+		 * in the ocr are set. However, Some controller
+		 * can set bit 7 (reserved for low voltages), but
+		 * how to manage low voltages SD card is not yet
+		 * specified.
+		 */
+		cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 :
+			(mmc->voltages & 0xff8000);
+
+		if (mmc->version == SD_VERSION_2)
+			cmd.cmdarg |= OCR_HCS;
+
+		err = mmc_send_cmd(mmc, &cmd, NULL);
+
+		if (err)
+			return err;
+
+		udelay(1000);
+	} while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
+
+	if (timeout <= 0)
+		return UNUSABLE_ERR;
+
+	if (mmc->version != SD_VERSION_2)
+		mmc->version = SD_VERSION_1_0;
+
+	if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
+		cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
+		cmd.resp_type = MMC_RSP_R3;
+		cmd.cmdarg = 0;
+
+		err = mmc_send_cmd(mmc, &cmd, NULL);
+
+		if (err)
+			return err;
+	}
+
+	mmc->ocr = cmd.response[0];
+
+	mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
+	mmc->rca = 0;
+
+	return 0;
+}
+
+/* We pass in the cmd since otherwise the init seems to fail */
+static int mmc_send_op_cond_iter(struct mmc *mmc, struct mmc_cmd *cmd,
+		int use_arg)
+{
+	int err;
+
+	cmd->cmdidx = MMC_CMD_SEND_OP_COND;
+	cmd->resp_type = MMC_RSP_R3;
+	cmd->cmdarg = 0;
+	if (use_arg && !mmc_host_is_spi(mmc)) {
+		cmd->cmdarg =
+			(mmc->voltages &
+			(mmc->op_cond_response & OCR_VOLTAGE_MASK)) |
+			(mmc->op_cond_response & OCR_ACCESS_MODE);
+
+		if (mmc->host_caps & MMC_MODE_HC)
+			cmd->cmdarg |= OCR_HCS;
+	}
+	err = mmc_send_cmd(mmc, cmd, NULL);
+	if (err)
+		return err;
+	mmc->op_cond_response = cmd->response[0];
+	return 0;
+}
+
+int mmc_send_op_cond(struct mmc *mmc)
+{
+	struct mmc_cmd cmd;
+	int err, i;
+
+	/* Some cards seem to need this */
+	mmc_go_idle(mmc);
+
+ 	/* Asking to the card its capabilities */
+	mmc->op_cond_pending = 1;
+	for (i = 0; i < 2; i++) {
+		err = mmc_send_op_cond_iter(mmc, &cmd, i != 0);
+		if (err)
+			return err;
+
+		/* exit if not busy (flag seems to be inverted) */
+		if (mmc->op_cond_response & OCR_BUSY)
+			return 0;
+	}
+	return IN_PROGRESS;
+}
+
+int mmc_complete_op_cond(struct mmc *mmc)
+{
+	struct mmc_cmd cmd;
+	int timeout = 1000;
+	uint start;
+	int err;
+
+	mmc->op_cond_pending = 0;
+	start = get_timer(0);
+	do {
+		err = mmc_send_op_cond_iter(mmc, &cmd, 1);
+		if (err)
+			return err;
+		if (get_timer(start) > timeout)
+			return UNUSABLE_ERR;
+		udelay(100);
+	} while (!(mmc->op_cond_response & OCR_BUSY));
+
+	if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
+		cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
+		cmd.resp_type = MMC_RSP_R3;
+		cmd.cmdarg = 0;
+
+		err = mmc_send_cmd(mmc, &cmd, NULL);
+
+		if (err)
+			return err;
+	}
+
+	mmc->version = MMC_VERSION_UNKNOWN;
+	mmc->ocr = cmd.response[0];
+
+	mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
+	mmc->rca = 0;
+
+	return 0;
+}
+
+
+static int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd)
+{
+	struct mmc_cmd cmd;
+	struct mmc_data data;
+	int err;
+
+	/* Get the Card Status Register */
+	cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
+	cmd.resp_type = MMC_RSP_R1;
+	cmd.cmdarg = 0;
+
+	data.dest = (char *)ext_csd;
+	data.blocks = 1;
+	data.blocksize = MMC_MAX_BLOCK_LEN;
+	data.flags = MMC_DATA_READ;
+
+	err = mmc_send_cmd(mmc, &cmd, &data);
+
+	return err;
+}
+
+
+static int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
+{
+	struct mmc_cmd cmd;
+	int timeout = 1000;
+	int ret;
+
+	cmd.cmdidx = MMC_CMD_SWITCH;
+	cmd.resp_type = MMC_RSP_R1b;
+	cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
+				 (index << 16) |
+				 (value << 8);
+
+	ret = mmc_send_cmd(mmc, &cmd, NULL);
+
+	/* Waiting for the ready status */
+	if (!ret)
+		ret = mmc_send_status(mmc, timeout);
+
+	return ret;
+
+}
+
+static int mmc_change_freq(struct mmc *mmc)
+{
+	ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
+	char cardtype;
+	int err;
+
+	mmc->card_caps = 0;
+
+	if (mmc_host_is_spi(mmc))
+		return 0;
+
+	/* Only version 4 supports high-speed */
+	if (mmc->version < MMC_VERSION_4)
+		return 0;
+
+	err = mmc_send_ext_csd(mmc, ext_csd);
+
+	if (err)
+		return err;
+
+	cardtype = ext_csd[EXT_CSD_CARD_TYPE] & 0xf;
+
+	err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
+
+	if (err)
+		return err;
+
+	/* Now check to see that it worked */
+	err = mmc_send_ext_csd(mmc, ext_csd);
+
+	if (err)
+		return err;
+
+	/* No high-speed support */
+	if (!ext_csd[EXT_CSD_HS_TIMING])
+		return 0;
+
+	/* High Speed is set, there are two types: 52MHz and 26MHz */
+	if (cardtype & MMC_HS_52MHZ)
+		mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
+	else
+		mmc->card_caps |= MMC_MODE_HS;
+
+	return 0;
+}
+
+static int mmc_set_capacity(struct mmc *mmc, int part_num)
+{
+	switch (part_num) {
+	case 0:
+		mmc->capacity = mmc->capacity_user;
+		break;
+	case 1:
+	case 2:
+		mmc->capacity = mmc->capacity_boot;
+		break;
+	case 3:
+		mmc->capacity = mmc->capacity_rpmb;
+		break;
+	case 4:
+	case 5:
+	case 6:
+	case 7:
+		mmc->capacity = mmc->capacity_gp[part_num - 4];
+		break;
+	default:
+		return -1;
+	}
+
+	mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
+
+	return 0;
+}
+
+int mmc_switch_part(int dev_num, unsigned int part_num)
+{
+	struct mmc *mmc = find_mmc_device(dev_num);
+	int ret;
+
+	if (!mmc)
+		return -1;
+
+	ret = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
+			 (mmc->part_config & ~PART_ACCESS_MASK)
+			 | (part_num & PART_ACCESS_MASK));
+	if (ret)
+		return ret;
+
+	return mmc_set_capacity(mmc, part_num);
+}
+
+int mmc_getcd(struct mmc *mmc)
+{
+	int cd;
+
+	cd = board_mmc_getcd(mmc);
+
+	if (cd < 0) {
+		if (mmc->getcd)
+			cd = mmc->getcd(mmc);
+		else
+			cd = 1;
+	}
+
+	return cd;
+}
+
+static int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
+{
+	struct mmc_cmd cmd;
+	struct mmc_data data;
+
+	/* Switch the frequency */
+	cmd.cmdidx = SD_CMD_SWITCH_FUNC;
+	cmd.resp_type = MMC_RSP_R1;
+	cmd.cmdarg = (mode << 31) | 0xffffff;
+	cmd.cmdarg &= ~(0xf << (group * 4));
+	cmd.cmdarg |= value << (group * 4);
+
+	data.dest = (char *)resp;
+	data.blocksize = 64;
+	data.blocks = 1;
+	data.flags = MMC_DATA_READ;
+
+	return mmc_send_cmd(mmc, &cmd, &data);
+}
+
+
+static int sd_change_freq(struct mmc *mmc)
+{
+	int err;
+	struct mmc_cmd cmd;
+	ALLOC_CACHE_ALIGN_BUFFER(uint, scr, 2);
+	ALLOC_CACHE_ALIGN_BUFFER(uint, switch_status, 16);
+	struct mmc_data data;
+	int timeout;
+
+	mmc->card_caps = 0;
+
+	if (mmc_host_is_spi(mmc))
+		return 0;
+
+	/* Read the SCR to find out if this card supports higher speeds */
+	cmd.cmdidx = MMC_CMD_APP_CMD;
+	cmd.resp_type = MMC_RSP_R1;
+	cmd.cmdarg = mmc->rca << 16;
+
+	err = mmc_send_cmd(mmc, &cmd, NULL);
+
+	if (err)
+		return err;
+
+	cmd.cmdidx = SD_CMD_APP_SEND_SCR;
+	cmd.resp_type = MMC_RSP_R1;
+	cmd.cmdarg = 0;
+
+	timeout = 3;
+
+retry_scr:
+	data.dest = (char *)scr;
+	data.blocksize = 8;
+	data.blocks = 1;
+	data.flags = MMC_DATA_READ;
+
+	err = mmc_send_cmd(mmc, &cmd, &data);
+
+	if (err) {
+		if (timeout--)
+			goto retry_scr;
+
+		return err;
+	}
+
+	mmc->scr[0] = __be32_to_cpu(scr[0]);
+	mmc->scr[1] = __be32_to_cpu(scr[1]);
+
+	switch ((mmc->scr[0] >> 24) & 0xf) {
+		case 0:
+			mmc->version = SD_VERSION_1_0;
+			break;
+		case 1:
+			mmc->version = SD_VERSION_1_10;
+			break;
+		case 2:
+			mmc->version = SD_VERSION_2;
+			if ((mmc->scr[0] >> 15) & 0x1)
+				mmc->version = SD_VERSION_3;
+			break;
+		default:
+			mmc->version = SD_VERSION_1_0;
+			break;
+	}
+
+	if (mmc->scr[0] & SD_DATA_4BIT)
+		mmc->card_caps |= MMC_MODE_4BIT;
+
+	/* Version 1.0 doesn't support switching */
+	if (mmc->version == SD_VERSION_1_0)
+		return 0;
+
+	timeout = 4;
+	while (timeout--) {
+		err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
+				(u8 *)switch_status);
+
+		if (err)
+			return err;
+
+		/* The high-speed function is busy.  Try again */
+		if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
+			break;
+	}
+
+	/* If high-speed isn't supported, we return */
+	if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
+		return 0;
+
+	/*
+	 * If the host doesn't support SD_HIGHSPEED, do not switch card to
+	 * HIGHSPEED mode even if the card support SD_HIGHSPPED.
+	 * This can avoid furthur problem when the card runs in different
+	 * mode between the host.
+	 */
+	if (!((mmc->host_caps & MMC_MODE_HS_52MHz) &&
+		(mmc->host_caps & MMC_MODE_HS)))
+		return 0;
+
+	err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)switch_status);
+
+	if (err)
+		return err;
+
+	if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
+		mmc->card_caps |= MMC_MODE_HS;
+
+	return 0;
+}
+
+/* frequency bases */
+/* divided by 10 to be nice to platforms without floating point */
+static const int fbase[] = {
+	10000,
+	100000,
+	1000000,
+	10000000,
+};
+
+/* Multiplier values for TRAN_SPEED.  Multiplied by 10 to be nice
+ * to platforms without floating point.
+ */
+static const int multipliers[] = {
+	0,	/* reserved */
+	10,
+	12,
+	13,
+	15,
+	20,
+	25,
+	30,
+	35,
+	40,
+	45,
+	50,
+	55,
+	60,
+	70,
+	80,
+};
+
+static void mmc_set_ios(struct mmc *mmc)
+{
+	mmc->set_ios(mmc);
+}
+
+static void mmc_set_74_clk(struct mmc *mmc)
+{
+	mmc->set_74_clk(mmc);
+}
+
+void mmc_set_clock(struct mmc *mmc, uint clock)
+{
+	if (clock > mmc->f_max)
+		clock = mmc->f_max;
+
+	if (clock < mmc->f_min)
+		clock = mmc->f_min;
+
+	mmc->clock = clock;
+
+	mmc_set_ios(mmc);
+}
+
+static void mmc_set_bus_width(struct mmc *mmc, uint width)
+{
+	mmc->bus_width = width;
+
+	mmc_set_ios(mmc);
+}
+
+static int mmc_startup(struct mmc *mmc)
+{
+	int err, i;
+	uint mult, freq;
+	u64 cmult, csize, capacity;
+	struct mmc_cmd cmd;
+	ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
+	ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, MMC_MAX_BLOCK_LEN);
+	int timeout = 1000;
+
+#ifdef CONFIG_MMC_SPI_CRC_ON
+	if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
+		cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
+		cmd.resp_type = MMC_RSP_R1;
+		cmd.cmdarg = 1;
+		err = mmc_send_cmd(mmc, &cmd, NULL);
+
+		if (err)
+			return err;
+	}
+#endif
+
+	/* Put the Card in Identify Mode */
+	cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
+		MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
+	cmd.resp_type = MMC_RSP_R2;
+	cmd.cmdarg = 0;
+
+	err = mmc_send_cmd(mmc, &cmd, NULL);
+
+	if (err)
+		return err;
+
+	memcpy(mmc->cid, cmd.response, 16);
+
+	/*
+	 * For MMC cards, set the Relative Address.
+	 * For SD cards, get the Relatvie Address.
+	 * This also puts the cards into Standby State
+	 */
+	if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
+		cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
+		cmd.cmdarg = mmc->rca << 16;
+		cmd.resp_type = MMC_RSP_R6;
+
+		err = mmc_send_cmd(mmc, &cmd, NULL);
+
+		if (err)
+			return err;
+
+		if (IS_SD(mmc))
+			mmc->rca = (cmd.response[0] >> 16) & 0xffff;
+	}
+
+	/* Get the Card-Specific Data */
+	cmd.cmdidx = MMC_CMD_SEND_CSD;
+	cmd.resp_type = MMC_RSP_R2;
+	cmd.cmdarg = mmc->rca << 16;
+
+	err = mmc_send_cmd(mmc, &cmd, NULL);
+
+	/* Waiting for the ready status */
+	mmc_send_status(mmc, timeout);
+
+	if (err)
+		return err;
+
+	mmc->csd[0] = cmd.response[0];
+	mmc->csd[1] = cmd.response[1];
+	mmc->csd[2] = cmd.response[2];
+	mmc->csd[3] = cmd.response[3];
+
+	if (mmc->version == MMC_VERSION_UNKNOWN) {
+		int version = (cmd.response[0] >> 26) & 0xf;
+
+		switch (version) {
+			case 0:
+				mmc->version = MMC_VERSION_1_2;
+				break;
+			case 1:
+				mmc->version = MMC_VERSION_1_4;
+				break;
+			case 2:
+				mmc->version = MMC_VERSION_2_2;
+				break;
+			case 3:
+				mmc->version = MMC_VERSION_3;
+				break;
+			case 4:
+				mmc->version = MMC_VERSION_4;
+				break;
+			default:
+				mmc->version = MMC_VERSION_1_2;
+				break;
+		}
+	}
+
+	/* divide frequency by 10, since the mults are 10x bigger */
+	freq = fbase[(cmd.response[0] & 0x7)];
+	mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
+
+	mmc->tran_speed = freq * mult;
+
+	mmc->dsr_imp = ((cmd.response[1] >> 12) & 0x1);
+	mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
+
+	if (IS_SD(mmc))
+		mmc->write_bl_len = mmc->read_bl_len;
+	else
+		mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
+
+	if (mmc->high_capacity) {
+		csize = (mmc->csd[1] & 0x3f) << 16
+			| (mmc->csd[2] & 0xffff0000) >> 16;
+		cmult = 8;
+	} else {
+		csize = (mmc->csd[1] & 0x3ff) << 2
+			| (mmc->csd[2] & 0xc0000000) >> 30;
+		cmult = (mmc->csd[2] & 0x00038000) >> 15;
+	}
+
+	mmc->capacity_user = (csize + 1) << (cmult + 2);
+	mmc->capacity_user *= mmc->read_bl_len;
+	mmc->capacity_boot = 0;
+	mmc->capacity_rpmb = 0;
+	for (i = 0; i < 4; i++)
+		mmc->capacity_gp[i] = 0;
+
+	if (mmc->read_bl_len > MMC_MAX_BLOCK_LEN)
+		mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
+
+	if (mmc->write_bl_len > MMC_MAX_BLOCK_LEN)
+		mmc->write_bl_len = MMC_MAX_BLOCK_LEN;
+
+	if ((mmc->dsr_imp) && (0xffffffff != mmc->dsr)) {
+		cmd.cmdidx = MMC_CMD_SET_DSR;
+		cmd.cmdarg = (mmc->dsr & 0xffff) << 16;
+		cmd.resp_type = MMC_RSP_NONE;
+		if (mmc_send_cmd(mmc, &cmd, NULL))
+			printf("MMC: SET_DSR failed\n");
+	}
+
+	/* Select the card, and put it into Transfer Mode */
+	if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
+		cmd.cmdidx = MMC_CMD_SELECT_CARD;
+		cmd.resp_type = MMC_RSP_R1;
+		cmd.cmdarg = mmc->rca << 16;
+		err = mmc_send_cmd(mmc, &cmd, NULL);
+
+		if (err)
+			return err;
+	}
+
+	/*
+	 * For SD, its erase group is always one sector
+	 */
+	mmc->erase_grp_size = 1;
+	mmc->part_config = MMCPART_NOAVAILABLE;
+	if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
+		/* check  ext_csd version and capacity */
+		err = mmc_send_ext_csd(mmc, ext_csd);
+		if (!err && (ext_csd[EXT_CSD_REV] >= 2)) {
+			/*
+			 * According to the JEDEC Standard, the value of
+			 * ext_csd's capacity is valid if the value is more
+			 * than 2GB
+			 */
+			capacity = ext_csd[EXT_CSD_SEC_CNT] << 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;
+			capacity *= MMC_MAX_BLOCK_LEN;
+			if ((capacity >> 20) > 2 * 1024)
+				mmc->capacity_user = capacity;
+		}
+
+		switch (ext_csd[EXT_CSD_REV]) {
+		case 1:
+			mmc->version = MMC_VERSION_4_1;
+			break;
+		case 2:
+			mmc->version = MMC_VERSION_4_2;
+			break;
+		case 3:
+			mmc->version = MMC_VERSION_4_3;
+			break;
+		case 5:
+			mmc->version = MMC_VERSION_4_41;
+			break;
+		case 6:
+			mmc->version = MMC_VERSION_4_5;
+			break;
+		}
+
+		/*
+		 * Host needs to enable ERASE_GRP_DEF bit if device is
+		 * partitioned. This bit will be lost every time after a reset
+		 * or power off. This will affect erase size.
+		 */
+		if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) &&
+		    (ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE] & PART_ENH_ATTRIB)) {
+			err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
+				EXT_CSD_ERASE_GROUP_DEF, 1);
+
+			if (err)
+				return err;
+
+			/* Read out group size from ext_csd */
+			mmc->erase_grp_size =
+				ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] *
+					MMC_MAX_BLOCK_LEN * 1024;
+		} else {
+			/* Calculate the group size from the csd value. */
+			int erase_gsz, erase_gmul;
+			erase_gsz = (mmc->csd[2] & 0x00007c00) >> 10;
+			erase_gmul = (mmc->csd[2] & 0x000003e0) >> 5;
+			mmc->erase_grp_size = (erase_gsz + 1)
+				* (erase_gmul + 1);
+		}
+
+		/* store the partition info of emmc */
+		if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) ||
+		    ext_csd[EXT_CSD_BOOT_MULT])
+			mmc->part_config = ext_csd[EXT_CSD_PART_CONF];
+
+		mmc->capacity_boot = ext_csd[EXT_CSD_BOOT_MULT] << 17;
+
+		mmc->capacity_rpmb = ext_csd[EXT_CSD_RPMB_MULT] << 17;
+
+		for (i = 0; i < 4; i++) {
+			int idx = EXT_CSD_GP_SIZE_MULT + i * 3;
+			mmc->capacity_gp[i] = (ext_csd[idx + 2] << 16) +
+				(ext_csd[idx + 1] << 8) + ext_csd[idx];
+			mmc->capacity_gp[i] *=
+				ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+			mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+		}
+	}
+
+	err = mmc_set_capacity(mmc, mmc->part_num);
+	if (err)
+		return err;
+
+	if (IS_SD(mmc))
+		err = sd_change_freq(mmc);
+	else
+		err = mmc_change_freq(mmc);
+
+	if (err)
+		return err;
+
+	/* Restrict card's capabilities by what the host can do */
+	mmc->card_caps &= mmc->host_caps;
+
+	if (IS_SD(mmc)) {
+		if (mmc->card_caps & MMC_MODE_4BIT) {
+			cmd.cmdidx = MMC_CMD_APP_CMD;
+			cmd.resp_type = MMC_RSP_R1;
+			cmd.cmdarg = mmc->rca << 16;
+
+			err = mmc_send_cmd(mmc, &cmd, NULL);
+			if (err)
+				return err;
+
+			cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
+			cmd.resp_type = MMC_RSP_R1;
+			cmd.cmdarg = 2;
+			err = mmc_send_cmd(mmc, &cmd, NULL);
+			if (err)
+				return err;
+
+			mmc_set_bus_width(mmc, 4);
+		}
+
+		if (mmc->card_caps & MMC_MODE_HS)
+			mmc->tran_speed = 50000000;
+		else
+			mmc->tran_speed = 25000000;
+	} else {
+		int idx;
+
+		/* An array of possible bus widths in order of preference */
+		static unsigned ext_csd_bits[] = {
+			EXT_CSD_BUS_WIDTH_8,
+			EXT_CSD_BUS_WIDTH_4,
+			EXT_CSD_BUS_WIDTH_1,
+		};
+
+		/* An array to map CSD bus widths to host cap bits */
+		static unsigned ext_to_hostcaps[] = {
+			[EXT_CSD_BUS_WIDTH_4] = MMC_MODE_4BIT,
+			[EXT_CSD_BUS_WIDTH_8] = MMC_MODE_8BIT,
+		};
+
+		/* An array to map chosen bus width to an integer */
+		static unsigned widths[] = {
+			8, 4, 1,
+		};
+
+		for (idx=0; idx < ARRAY_SIZE(ext_csd_bits); idx++) {
+			unsigned int extw = ext_csd_bits[idx];
+
+			/*
+			 * Check to make sure the controller supports
+			 * this bus width, if it's more than 1
+			 */
+			if (extw != EXT_CSD_BUS_WIDTH_1 &&
+					!(mmc->host_caps & ext_to_hostcaps[extw]))
+				continue;
+
+			err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
+					EXT_CSD_BUS_WIDTH, extw);
+
+			if (err)
+				continue;
+
+			mmc_set_bus_width(mmc, widths[idx]);
+
+			err = mmc_send_ext_csd(mmc, test_csd);
+			if (!err && ext_csd[EXT_CSD_PARTITIONING_SUPPORT] \
+				    == test_csd[EXT_CSD_PARTITIONING_SUPPORT]
+				 && ext_csd[EXT_CSD_ERASE_GROUP_DEF] \
+				    == test_csd[EXT_CSD_ERASE_GROUP_DEF] \
+				 && ext_csd[EXT_CSD_REV] \
+				    == test_csd[EXT_CSD_REV]
+				 && ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] \
+				    == test_csd[EXT_CSD_HC_ERASE_GRP_SIZE]
+				 && memcmp(&ext_csd[EXT_CSD_SEC_CNT], \
+					&test_csd[EXT_CSD_SEC_CNT], 4) == 0) {
+
+				mmc->card_caps |= ext_to_hostcaps[extw];
+				break;
+			}
+		}
+
+		if (mmc->card_caps & MMC_MODE_HS) {
+			if (mmc->card_caps & MMC_MODE_HS_52MHz)
+				mmc->tran_speed = 52000000;
+			else
+				mmc->tran_speed = 26000000;
+		}
+	}
+
+	mmc_set_clock(mmc, mmc->tran_speed);
+
+	/* fill in device description */
+	mmc->block_dev.lun = 0;
+	mmc->block_dev.type = 0;
+	mmc->block_dev.blksz = mmc->read_bl_len;
+	mmc->block_dev.log2blksz = LOG2(mmc->block_dev.blksz);
+	mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
+#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
+	sprintf(mmc->block_dev.vendor, "Man %06x Snr %04x%04x",
+		mmc->cid[0] >> 24, (mmc->cid[2] & 0xffff),
+		(mmc->cid[3] >> 16) & 0xffff);
+	sprintf(mmc->block_dev.product, "%c%c%c%c%c%c", mmc->cid[0] & 0xff,
+		(mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
+		(mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff,
+		(mmc->cid[2] >> 24) & 0xff);
+	sprintf(mmc->block_dev.revision, "%d.%d", (mmc->cid[2] >> 20) & 0xf,
+		(mmc->cid[2] >> 16) & 0xf);
+#else
+	mmc->block_dev.vendor[0] = 0;
+	mmc->block_dev.product[0] = 0;
+	mmc->block_dev.revision[0] = 0;
+#endif
+#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBDISK_SUPPORT)
+	init_part(&mmc->block_dev);
+#endif
+
+	return 0;
+}
+
+static int mmc_send_if_cond(struct mmc *mmc)
+{
+	struct mmc_cmd cmd;
+	int err;
+
+	cmd.cmdidx = SD_CMD_SEND_IF_COND;
+	/* We set the bit if the host supports voltages between 2.7 and 3.6 V */
+	cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
+	cmd.resp_type = MMC_RSP_R7;
+
+	err = mmc_send_cmd(mmc, &cmd, NULL);
+
+	if (err)
+		return err;
+
+	if ((cmd.response[0] & 0xff) != 0xaa)
+		return UNUSABLE_ERR;
+	else
+		mmc->version = SD_VERSION_2;
+
+	return 0;
+}
+
+static int mmc_dev_init(int dev_num);
+int mmc_register(struct mmc *mmc)
+{
+	/* Setup dsr related values */
+	mmc->dsr_imp = 0;
+	mmc->dsr = 0xffffffff;
+	/* Setup the universal parts of the block interface just once */
+	mmc->block_dev.if_type = IF_TYPE_MMC;
+	mmc->block_dev.dev = cur_dev_num++;
+	mmc->block_dev.removable = 1;
+	mmc->block_dev.block_read = mmc_bread;
+	mmc->block_dev.block_write = mmc_bwrite;
+	mmc->block_dev.block_erase = mmc_berase;
+	mmc->block_dev.dev_init = mmc_dev_init;
+	if (!mmc->b_max)
+		mmc->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
+
+	INIT_LIST_HEAD (&mmc->link);
+
+	list_add_tail (&mmc->link, &mmc_devices);
+
+	return 0;
+}
+
+#ifdef CONFIG_PARTITIONS
+block_dev_desc_t *mmc_get_dev(int dev)
+{
+	struct mmc *mmc = find_mmc_device(dev);
+	if (!mmc || mmc_init(mmc))
+		return NULL;
+
+	return &mmc->block_dev;
+}
+#endif
+
+int mmc_start_init(struct mmc *mmc)
+{
+	int err;
+
+	if (mmc_getcd(mmc) == 0) {
+		mmc->has_init = 0;
+#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
+		printf("MMC: no card present\n");
+#endif
+		return NO_CARD_ERR;
+	}
+
+	if (mmc->has_init)
+		return 0;
+
+	err = mmc->init(mmc);
+
+	if (err)
+		return err;
+
+	mmc_set_bus_width(mmc, 1);
+	mmc_set_clock(mmc, 1);
+	mmc_set_74_clk(mmc);
+
+	/* Reset the Card */
+	err = mmc_go_idle(mmc);
+
+	if (err)
+		return err;
+
+	/* The internal partition reset to user partition(0) at every CMD0*/
+	mmc->part_num = 0;
+
+	/* Test for SD version 2 */
+	err = mmc_send_if_cond(mmc);
+
+	/* Now try to get the SD card's operating condition */
+	err = sd_send_op_cond(mmc);
+
+	/* If the command timed out, we check for an MMC card */
+	if (err == TIMEOUT) {
+		err = mmc_send_op_cond(mmc);
+
+		if (err && err != IN_PROGRESS) {
+#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
+			printf("Card did not respond to voltage select!\n");
+#endif
+			return UNUSABLE_ERR;
+		}
+	}
+
+	if (err == IN_PROGRESS)
+		mmc->init_in_progress = 1;
+
+	return err;
+}
+
+static int mmc_complete_init(struct mmc *mmc)
+{
+	int err = 0;
+
+	if (mmc->op_cond_pending)
+		err = mmc_complete_op_cond(mmc);
+
+	if (!err)
+		err = mmc_startup(mmc);
+	if (err)
+		mmc->has_init = 0;
+	else
+		mmc->has_init = 1;
+	mmc->init_in_progress = 0;
+	return err;
+}
+
+int mmc_init(struct mmc *mmc)
+{
+	int err = IN_PROGRESS;
+	unsigned start = get_timer(0);
+
+	if (mmc->has_init)
+		return 0;
+	if (!mmc->init_in_progress)
+		err = mmc_start_init(mmc);
+
+	if (!err || err == IN_PROGRESS)
+		err = mmc_complete_init(mmc);
+	debug("%s: %d, time %lu\n", __func__, err, get_timer(start));
+	return err;
+}
+
+int mmc_set_dsr(struct mmc *mmc, u16 val)
+{
+	mmc->dsr = val;
+	return 0;
+}
+
+static int mmc_dev_init(int dev_num)
+{
+	struct mmc *mmc = find_mmc_device(dev_num);
+	if (!mmc)
+		return -1;
+
+	return mmc_init(mmc);
+}
+
+/*
+ * CPU and board-specific MMC initializations.  Aliased function
+ * signals caller to move on
+ */
+static int __def_mmc_init(bd_t *bis)
+{
+	return -1;
+}
+
+int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
+int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
+
+#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
+
+void print_mmc_devices(char separator)
+{
+	struct mmc *m;
+	struct list_head *entry;
+
+	list_for_each(entry, &mmc_devices) {
+		m = list_entry(entry, struct mmc, link);
+
+		printf("%s: %d", m->name, m->block_dev.dev);
+
+		if (entry->next != &mmc_devices)
+			printf("%c ", separator);
+	}
+
+	printf("\n");
+}
+
+#else
+void print_mmc_devices(char separator) { }
+#endif
+
+int get_mmc_num(void)
+{
+	return cur_dev_num;
+}
+
+void mmc_set_preinit(struct mmc *mmc, int preinit)
+{
+	mmc->preinit = preinit;
+}
+
+static void do_preinit(void)
+{
+	struct mmc *m;
+	struct list_head *entry;
+
+	list_for_each(entry, &mmc_devices) {
+		m = list_entry(entry, struct mmc, link);
+
+		if (m->preinit)
+			mmc_start_init(m);
+	}
+}
+
+
+int mmc_initialize(bd_t *bis)
+{
+	INIT_LIST_HEAD (&mmc_devices);
+	cur_dev_num = 0;
+
+	if (board_mmc_init(bis) < 0)
+		cpu_mmc_init(bis);
+
+#ifndef CONFIG_SPL_BUILD
+	print_mmc_devices(',');
+#endif
+
+	do_preinit();
+	return 0;
+}
+
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+/*
+ * This function changes the size of boot partition and the size of rpmb
+ * partition present on EMMC devices.
+ *
+ * Input Parameters:
+ * struct *mmc: pointer for the mmc device strcuture
+ * bootsize: size of boot partition
+ * rpmbsize: size of rpmb partition
+ *
+ * Returns 0 on success.
+ */
+
+int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
+				unsigned long rpmbsize)
+{
+	int err;
+	struct mmc_cmd cmd;
+
+	/* Only use this command for raw EMMC moviNAND. Enter backdoor mode */
+	cmd.cmdidx = MMC_CMD_RES_MAN;
+	cmd.resp_type = MMC_RSP_R1b;
+	cmd.cmdarg = MMC_CMD62_ARG1;
+
+	err = mmc_send_cmd(mmc, &cmd, NULL);
+	if (err) {
+		debug("mmc_boot_partition_size_change: Error1 = %d\n", err);
+		return err;
+	}
+
+	/* Boot partition changing mode */
+	cmd.cmdidx = MMC_CMD_RES_MAN;
+	cmd.resp_type = MMC_RSP_R1b;
+	cmd.cmdarg = MMC_CMD62_ARG2;
+
+	err = mmc_send_cmd(mmc, &cmd, NULL);
+	if (err) {
+		debug("mmc_boot_partition_size_change: Error2 = %d\n", err);
+		return err;
+	}
+	/* boot partition size is multiple of 128KB */
+	bootsize = (bootsize * 1024) / 128;
+
+	/* Arg: boot partition size */
+	cmd.cmdidx = MMC_CMD_RES_MAN;
+	cmd.resp_type = MMC_RSP_R1b;
+	cmd.cmdarg = bootsize;
+
+	err = mmc_send_cmd(mmc, &cmd, NULL);
+	if (err) {
+		debug("mmc_boot_partition_size_change: Error3 = %d\n", err);
+		return err;
+	}
+	/* RPMB partition size is multiple of 128KB */
+	rpmbsize = (rpmbsize * 1024) / 128;
+	/* Arg: RPMB partition size */
+	cmd.cmdidx = MMC_CMD_RES_MAN;
+	cmd.resp_type = MMC_RSP_R1b;
+	cmd.cmdarg = rpmbsize;
+
+	err = mmc_send_cmd(mmc, &cmd, NULL);
+	if (err) {
+		debug("mmc_boot_partition_size_change: Error4 = %d\n", err);
+		return err;
+	}
+	return 0;
+}
+
+/*
+ * This function shall form and send the commands to open / close the
+ * boot partition specified by user.
+ *
+ * Input Parameters:
+ * ack: 0x0 - No boot acknowledge sent (default)
+ *	0x1 - Boot acknowledge sent during boot operation
+ * part_num: User selects boot data that will be sent to master
+ *	0x0 - Device not boot enabled (default)
+ *	0x1 - Boot partition 1 enabled for boot
+ *	0x2 - Boot partition 2 enabled for boot
+ * access: User selects partitions to access
+ *	0x0 : No access to boot partition (default)
+ *	0x1 : R/W boot partition 1
+ *	0x2 : R/W boot partition 2
+ *	0x3 : R/W Replay Protected Memory Block (RPMB)
+ *
+ * Returns 0 on success.
+ */
+int mmc_boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
+{
+	int err;
+	struct mmc_cmd cmd;
+
+	/* Boot ack enable, boot partition enable , boot partition access */
+	cmd.cmdidx = MMC_CMD_SWITCH;
+	cmd.resp_type = MMC_RSP_R1b;
+
+	cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
+			(EXT_CSD_PART_CONF << 16) |
+			((EXT_CSD_BOOT_ACK(ack) |
+			EXT_CSD_BOOT_PART_NUM(part_num) |
+			EXT_CSD_PARTITION_ACCESS(access)) << 8);
+
+	err = mmc_send_cmd(mmc, &cmd, NULL);
+	if (err) {
+		if (access) {
+			debug("mmc boot partition#%d open fail:Error1 = %d\n",
+			      part_num, err);
+		} else {
+			debug("mmc boot partition#%d close fail:Error = %d\n",
+			      part_num, err);
+		}
+		return err;
+	}
+
+	if (access) {
+		/* 4bit transfer mode at booting time. */
+		cmd.cmdidx = MMC_CMD_SWITCH;
+		cmd.resp_type = MMC_RSP_R1b;
+
+		cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
+				(EXT_CSD_BOOT_BUS_WIDTH << 16) |
+				((1 << 0) << 8);
+
+		err = mmc_send_cmd(mmc, &cmd, NULL);
+		if (err) {
+			debug("mmc boot partition#%d open fail:Error2 = %d\n",
+			      part_num, err);
+			return err;
+		}
+	}
+	return 0;
+}
+#endif