u-boot v2009.08 sd/mmc support.

Signed-off-by: Terry Lv <r65388@freescale.com>

4 files changed, 492 insertions, 1583 deletions

diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index afb74ae16b..15c07caf3a 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -34,6 +34,7 @@ COBJS-$(CONFIG_MXC_MMC) += mxcmmc.o
 COBJS-$(CONFIG_PXA_MMC) += pxa_mmc.o
 COBJS-$(CONFIG_FSL_MMC) += fsl_mmc.o
 COBJS-$(CONFIG_FSL_MMC) += fsl_esdhc.o
+COBJS-$(CONFIG_IMX_MMC) += imx_esdhc.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)
diff --git a/drivers/mmc/fsl_mmc.c b/drivers/mmc/fsl_mmc.c
deleted file mode 100644
index 2be9f3e702..0000000000
--- a/drivers/mmc/fsl_mmc.c
+++ /dev/null
@@ -1,1569 +0,0 @@
-/*
- * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
- *
- * See file CREDITS for	list of people who contributed to this
- * project.
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59	Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <config.h>
-#include <common.h>
-#ifdef CONFIG_MMC
-#include <linux/mmc/mmc.h>
-#include <linux/mmc/sd.h>
-#include <linux/mmc/core.h>
-#include <linux/mmc/card.h>
-#include <asm/errno.h>
-#include <part.h>
-#include <asm/arch/sdhc.h>
-#include <linux/types.h>
-
-#define CARD_SUPPORT_BYTE_MODE			(0)
-#define CARD_SUPPORT_SECT_MODE			(1)
-
-#define RETRY_TIMEOUT					(10)
-
-
-extern int sdhc_init();
-
-extern int fat_register_device(block_dev_desc_t *dev_desc, int part_no);
-
-static block_dev_desc_t	mmc_dev;
-
-block_dev_desc_t *mmc_get_dev(int dev)
-{
-	return (block_dev_desc_t *)&mmc_dev;
-}
-
-/*
- * FIXME needs to read cid and csd info	to determine block size
- * and other parameters
- */
-static int mmc_ready;
-static u32 g_Card_Address_Mode;
-static u32 g_Card_rca;
-
-enum states {
-    IDLE,
-    READY,
-    IDENT,
-    STBY,
-    TRAN,
-    DATA,
-    RCV,
-    PRG,
-    DIS,
-    BTST,
-    SLP
-};
-
-static u32 mmc_cmd(struct mmc_command *cmd, u32 opcode,
-		u32 arg, u32 xfer, u32 fmt, u32 write,
-		u32 crc, u32 cmd_check_en);
-static u32 mmc_acmd(struct mmc_command *cmd, u32 opcode,
-		u32 arg, u32 xfer, u32 fmt, u32 write,
-		u32 crc, u32 cmd_check_en);
-static s32 mmc_decode_cid(struct mmc_card *card);
-static s32 mmc_decode_csd(struct mmc_card *card);
-static s32 sd_voltage_validation(void);
-static s32 mmc_voltage_validation(void);
-static s32 mmc_send_cid(struct mmc_card *card);
-static s32 mmc_send_csd(struct mmc_card *card, u32 u32CardRCA);
-static s32 mmc_select_card(u32 card_rca);
-static s32 mmcsd_check_status(u32 card_rca, u32 timeout,
-		u32 card_state, u32 status_bit);
-static s32 mmc_send_relative_addr(u32 *u32CardRCA);
-static s32 mmc_decode_scr(struct mmc_card *card);
-static s32 mmc_send_scr(struct mmc_card *card);
-static s32 mmc_set_relative_addr(u32 u32CardRCA);
-static s32 mmc_app_set_bus_width(s32 width);
-static s32 mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value);
-static s32 mmc_sd_switch(struct mmc_card *card, s32 mode, s32 group,
-						u8 value, u8 *resp);
-
-static u32 mmc_cmd(struct mmc_command *cmd, u32 opcode,
-			u32 arg, u32 xfer, u32 fmt,
-			u32 write, u32 crc, u32 cmd_check_en)
-{
-	struct mmc_command *pCmd = cmd;
-
-	pCmd->cmd.command = opcode;
-	pCmd->cmd.arg =	arg;
-	pCmd->cmd.data_transfer	= xfer;
-	pCmd->cmd.response_format = pCmd->resp.format = fmt;
-	pCmd->cmd.data_present = write;
-	pCmd->cmd.crc_check = crc;
-	pCmd->cmd.cmdindex_check = cmd_check_en;
-
-	if (MMC_READ_MULTIPLE_BLOCK == opcode || \
-		MMC_WRITE_MULTIPLE_BLOCK == opcode) {
-		pCmd->cmd.block_count_enable_check = ENABLE;
-		pCmd->cmd.multi_single_block = MULTIPLE;
-	} else {
-		pCmd->cmd.block_count_enable_check = DISABLE;
-		pCmd->cmd.multi_single_block = SINGLE;
-	}
-
-	if (interface_send_cmd_wait_resp(&(pCmd->cmd))) {
-		debug("interface_send_cmd_wait_resp Failed!\n");
-		return EPERM;
-	}
-
-	interface_read_response(&(pCmd->resp));
-
-	return 0;
-}
-
-static u32 mmc_acmd(struct mmc_command *cmd, u32 opcode,
-			u32 arg, u32 xfer, u32 fmt, u32 write,
-			u32 crc, u32 cmd_check_en)
-{
-	struct mmc_command *pCmd = cmd;
-	struct mmc_command stAPCmd;
-
-	memset(&stAPCmd, 0, sizeof(struct mmc_command));
-
-	/* Send MMC_APP_CMD first to use ACMD */
-	stAPCmd.cmd.command = MMC_APP_CMD;
-	stAPCmd.cmd.arg = (g_Card_rca << 16);
-	stAPCmd.cmd.data_transfer = READ;
-	stAPCmd.cmd.response_format = stAPCmd.resp.format = RESPONSE_48;
-	stAPCmd.cmd.data_present = DATA_PRESENT_NONE;
-	stAPCmd.cmd.crc_check = ENABLE;
-	stAPCmd.cmd.cmdindex_check = ENABLE;
-
-	if (interface_send_cmd_wait_resp(&(stAPCmd.cmd))) {
-		debug("Send MMC_APP_CMD Failed! :(\n");
-		return EPERM;
-	}
-
-	pCmd->cmd.command = opcode;
-	pCmd->cmd.arg =	arg;
-	pCmd->cmd.data_transfer	= xfer;
-	pCmd->cmd.response_format = pCmd->resp.format = fmt;
-	pCmd->cmd.data_present = write;
-	pCmd->cmd.crc_check = crc;
-	pCmd->cmd.cmdindex_check = cmd_check_en;
-
-	if (interface_send_cmd_wait_resp(&(pCmd->cmd))) {
-		debug("interface_send_cmd_wait_resp Failed!, :(\n");
-		return EPERM;
-	}
-
-	interface_read_response(&(pCmd->resp));
-
-	return 0;
-}
-
-int
-/****************************************************/
-mmc_read(ulong src, uchar *dst, int size)
-/****************************************************/
-{
-	struct mmc_command stCmd;
-	u32 u32Offset = src;
-	u32 *pu32Dst = (u32 *)dst;
-	s32 s32Rslt = EPERM;
-	s32 s32ReadRslt	= 0;
-	u32 u32BlkLen = BLK_LEN;
-	u32 u32MultiBlkNum = 0;
-
-	if (!mmc_ready)	{
-		printf("Please initial the Card first\n");
-		return EPERM;
-	}
-
-	if (size == 0)
-		return 0;
-
-	debug("Entry: mmc_read\n");
-
-	debug("src:%08x	dst:%08x size:%d\n", src,	dst, size);
-
-	memset(&stCmd, 0, sizeof(struct	mmc_command));
-
-	if (g_Card_Address_Mode	== CARD_SUPPORT_SECT_MODE) {
-		u32BlkLen = 1;
-		u32Offset /= BLK_LEN;
-	}
-
-	u32MultiBlkNum = (size % BLK_LEN) ? ((size / BLK_LEN) + 1) \
-					 : (size / BLK_LEN);
-
-	if (mmcsd_check_status(g_Card_rca, 96, TRAN, R1_ERROR)) {
-		debug("Can't wait for TRAN state! :(\n");
-		return EPERM;
-	}
-
-	interface_config_block_info(BLK_LEN, u32MultiBlkNum, \
-				(u32)0x00000080);
-
-	s32Rslt	= mmc_cmd(&stCmd,
-			((u32MultiBlkNum > 1) ? MMC_READ_MULTIPLE_BLOCK : MMC_READ_SINGLE_BLOCK),
-			u32Offset,
-			READ,
-			RESPONSE_48,
-			DATA_PRESENT,
-			ENABLE,
-			ENABLE);
-
-	if (s32Rslt) {
-		debug("Send MMC_READ_MULTIPLE_BLOCK Failed! :(\n");
-		return EPERM;
-	}
-
-	s32Rslt	= interface_data_read((u32 *)pu32Dst, BLK_LEN * u32MultiBlkNum);
-
-	if (s32Rslt) {
-		debug("interface_data_read Failed! :(\n");
-		return EPERM;
-	}
-
-	if (u32MultiBlkNum > 1) {
-		s32Rslt	= mmc_cmd(&stCmd,
-				MMC_STOP_TRANSMISSION,
-				0,
-				READ,
-				RESPONSE_48,
-				DATA_PRESENT_NONE,
-				ENABLE,
-				ENABLE);
-
-		if (s32Rslt) {
-			debug("Send MMC_STOP_TRANSMISSION Failed! :(\n");
-			return EPERM;
-		}
-	}
-
-	debug("mmc_read	succeed! :)\n");
-
-	debug("Exit: mmc_read\n");
-
-	return s32ReadRslt;
-}
-
-int
-/****************************************************/
-mmc_write(uchar *src, ulong dst, int size)
-/****************************************************/
-{
-	struct mmc_command stCmd;
-	u32 u32Offset = dst;
-	s32 s32Rslt = EPERM;
-	s32 s32WriteRslt = 0;
-	u32 u32BlkLen = BLK_LEN;
-	u32 *pu32Src = (u32 *)src;
-	u32 u32MultiBlkNum = 0;
-
-	debug("Entry: mmc_write\n");
-
-	debug("src:%08x	dst:%08x size:%d\n", src,	dst, size);
-
-	if (!mmc_ready)	{
-		printf("Please initial the Card first\n");
-		return -1;
-	}
-
-	if (size == 0)
-		return 0;
-
-	memset(&stCmd, 0, sizeof(struct	mmc_command));
-
-	if (g_Card_Address_Mode	== CARD_SUPPORT_SECT_MODE) {
-		u32BlkLen = 1;
-		u32Offset /= BLK_LEN;
-	}
-
-	u32MultiBlkNum = (size % BLK_LEN) ? ((size / BLK_LEN) + 1) \
-					 : (size / BLK_LEN);
-
-	if (mmcsd_check_status(g_Card_rca, 96, TRAN, R1_ERROR)) {
-		debug("Can't wait for TRAN state! :(\n");
-		return EPERM;
-	}
-
-	interface_config_block_info(BLK_LEN, u32MultiBlkNum, \
-					(u32)0x00800000);
-
-	s32Rslt	= mmc_cmd(&stCmd,
-			((u32MultiBlkNum > 1) ? MMC_WRITE_MULTIPLE_BLOCK : MMC_WRITE_BLOCK),
-			u32Offset,
-			WRITE,
-			RESPONSE_48,
-			DATA_PRESENT,
-			ENABLE,
-			ENABLE);
-
-	if (s32Rslt) {
-		debug("Send MMC_WRITE_BLOCK Failed! :(\n");
-		return EPERM;
-	}
-
-	s32Rslt	= interface_data_write((u32 *)pu32Src,
-					BLK_LEN * u32MultiBlkNum);
-
-	if (s32Rslt) {
-		debug("interface_data_read Failed! :(\n");
-		return EPERM;
-	}
-
-	if (u32MultiBlkNum > 1) {
-		s32Rslt	= mmc_cmd(&stCmd,
-				MMC_STOP_TRANSMISSION,
-				0,
-				READ,
-				RESPONSE_48,
-				DATA_PRESENT_NONE,
-				ENABLE,
-				ENABLE);
-
-		if (s32Rslt) {
-			debug("Send MMC_STOP_TRANSMISSION Failed! :(\n");
-			return EPERM;
-		}
-	}
-
-	debug("mmc_write succeed! :)\n");
-
-	debug("Exit: mmc_write\n");
-
-	return s32WriteRslt;
-}
-
-ulong
-/****************************************************/
-mmc_bread(int dev, ulong blknr, lbaint_t blkcnt, void *dst)
-/****************************************************/
-{
-	int mmc_block_size = BLK_LEN;
-	ulong src = blknr * mmc_block_size + CONFIG_MMC_BASE;
-
-	if (mmc_read(src, (uchar *)dst, blkcnt * mmc_block_size))
-		return 0;
-	else
-		return blkcnt;
-}
-
-ulong
-/****************************************************/
-mmc_bwrite(int dev, ulong blknr, lbaint_t blkcnt, const void *src)
-/****************************************************/
-{
-	int mmc_block_size = BLK_LEN;
-	ulong dst = blknr * mmc_block_size + CONFIG_MMC_BASE;
-
-	if (mmc_write((uchar *)src, dst, blkcnt * mmc_block_size))
-		return 0;
-	else
-		return blkcnt;
-}
-
-#define	UNSTUFF_BITS(resp, start, size)					\
-	({								\
-		const int __size = size;				\
-		const uint32_t __mask =	(__size	< 32 ? 1 << __size : 0) - 1; \
-		const int32_t __off = 3 - ((start) / 32); \
-		const int32_t __shft = (start) & 31; \
-		uint32_t __res;						\
-									\
-		__res =	resp[__off] >> __shft;				\
-		if (__size + __shft > 32)				\
-			__res |= resp[__off-1] << ((32 - __shft) % 32);	\
-		__res &	__mask;						\
-	})
-
-static const unsigned int tran_exp[] = {
-	10000, 100000, 1000000, 10000000,
-	0, 0, 0, 0
-};
-
-static const unsigned char tran_mant[] = {
-	0,  10, 12, 13, 15, 20, 25, 30,
-	35, 40, 45, 50, 55, 60, 70, 80,
-};
-
-static const unsigned int tacc_exp[] = {
-	1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
-};
-
-static const unsigned int tacc_mant[] = {
-	0,  10, 12, 13, 15, 20, 25, 30,
-	35, 40, 45, 50, 55, 60, 70, 80,
-};
-
-static s32 mmc_set_blk_len(u32 len)
-{
-	s32 s32Rslt = 0;
-	struct mmc_command stCmd;
-
-	debug("Entry: mmc_set_blk_len\n");
-
-	memset(&stCmd, 0, sizeof(struct mmc_command));
-
-	s32Rslt	= mmc_cmd(&stCmd,
-			MMC_SET_BLOCKLEN,
-			BLK_LEN,
-			READ,
-			RESPONSE_48,
-			DATA_PRESENT_NONE,
-			ENABLE,
-			ENABLE);
-
-	if (s32Rslt) {
-		debug("Send MMC_SET_BLOCKLEN Failed! :(\n");
-		return EPERM;
-	}
-
-	debug("Exit: mmc_set_blk_len\n");
-
-	return s32Rslt;
-}
-
-/*
- * Given the decoded CSD structure, decode the raw CID to our CID structure.
- */
-static s32 mmc_decode_cid(struct mmc_card *card)
-{
-	u32 *resp = card->raw_cid;
-
-	debug("Entry: mmc_decode_cid\n");
-
-	if (!card) {
-		debug("NULL card pointer!\n");
-		return EPERM;
-	}
-
-	memset(&card->cid, 0, sizeof(struct mmc_cid));
-
-	switch (card->type) {
-	case MMC_TYPE_MMC:
-		debug("MMC Card!\n");
-		/*
-		* 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;
-
-			sprintf((char *)mmc_dev.vendor,
-				"Man %08x \"%c%c%c%c%c%c%c\" Date %02u/%04u",
-				card->cid.manfid,
-				card->cid.prod_name[0],
-				card->cid.prod_name[1],
-				card->cid.prod_name[2],
-				card->cid.prod_name[3],
-				card->cid.prod_name[4],
-				card->cid.prod_name[5],
-				card->cid.prod_name[6],
-				card->cid.month,
-				card->cid.year);
-			sprintf((char *)mmc_dev.revision, "%d.%d",
-					card->cid.hwrev,
-					card->cid.fwrev);
-			sprintf((char *)mmc_dev.product, "%u",
-					card->cid.serial);
-			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.mmc_id	= \
-				UNSTUFF_BITS(resp, 104, 16);
-			card->cid.prod_name[0]	= \
-				UNSTUFF_BITS(resp, 96, 8);
-			card->cid.prod_name[1]	= \
-				UNSTUFF_BITS(resp, 88, 8);
-			card->cid.prod_name[2]	= \
-				UNSTUFF_BITS(resp, 80, 8);
-			card->cid.prod_name[3]	= \
-				UNSTUFF_BITS(resp, 72, 8);
-			card->cid.prod_name[4]	= \
-				UNSTUFF_BITS(resp, 64, 8);
-			card->cid.prod_name[5]	= \
-				UNSTUFF_BITS(resp, 56, 8);
-			card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
-			card->cid.month	 = UNSTUFF_BITS(resp, 12, 4);
-			card->cid.year	 = \
-				UNSTUFF_BITS(resp, 8, 4) + 1997;
-
-			sprintf((char *)mmc_dev.vendor,
-			"Man %02x OEM %04x \"%c%c%c%c%c%c\" Date %02u/%04u",
-				card->cid.manfid,
-				card->cid.oemid.mmc_id,
-				card->cid.prod_name[0],
-				card->cid.prod_name[1],
-				card->cid.prod_name[2],
-				card->cid.prod_name[3],
-				card->cid.prod_name[4],
-				card->cid.prod_name[5],
-				card->cid.month,
-				card->cid.year);
-			sprintf((char *)mmc_dev.product, "%u",
-					card->cid.serial);
-			sprintf((char *)mmc_dev.revision, "N/A");
-			break;
-		default:
-			printf("MMC card has unknown MMCA version %d\n",
-				card->csd.mmca_vsn);
-			return EPERM;
-		}
-		break;
-
-	case MMC_TYPE_SD:
-		debug("SD Card!\n");
-		card->cid.manfid	= UNSTUFF_BITS(resp, 120, 8);
-		card->cid.oemid.sd_id[0] = UNSTUFF_BITS(resp, 112, 8);
-		card->cid.oemid.sd_id[1] = UNSTUFF_BITS(resp, 104, 8);
-		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 */
-
-		sprintf((char *)mmc_dev.vendor,
-			"Man %02x OEM %c%c \"%c%c%c%c%c\" Date %02u/%04u",
-			card->cid.manfid,
-			card->cid.oemid.sd_id[0],
-			card->cid.oemid.sd_id[1],
-			card->cid.prod_name[0],
-			card->cid.prod_name[1],
-			card->cid.prod_name[2],
-			card->cid.prod_name[3],
-			card->cid.prod_name[4],
-			card->cid.month,
-			card->cid.year);
-		sprintf((char *)mmc_dev.revision, "%d.%d",
-				card->cid.hwrev, card->cid.fwrev);
-		sprintf((char *)mmc_dev.product, "%u",
-				card->cid.serial);
-		break;
-
-	default:
-		printf("unknown card type!\n");
-		return EPERM;
-	}
-
-	printf("%s card.\nVendor: %s\nProduct: %s\nRevision: %s\n",
-	       (IF_TYPE_SD == mmc_dev.if_type) ? "SD" : "MMC", mmc_dev.vendor,
-	       mmc_dev.product, mmc_dev.revision);
-
-	debug("Exit: mmc_decode_cid\n");
-
-	return 0;
-}
-
-/*
- * Given a 128-bit response, decode to our card CSD structure.
- */
-static s32 mmc_decode_csd(struct mmc_card *card)
-{
-	struct mmc_csd *csd = &card->csd;
-	u32 e, m, csd_struct;
-	u32 *resp = card->raw_csd;
-
-	debug("Entry: mmc_decode_csd\n");
-
-	if (!card) {
-		debug("NULL card pointer!\n");
-		return EPERM;
-	}
-
-	switch (card->type) {
-	case MMC_TYPE_MMC:
-		/*
-		 * We only understand CSD structure v1.1 and v1.2.
-		 * v1.2	has extra information in bits 15, 11 and 10.
-		 */
-		csd_struct = UNSTUFF_BITS(resp,	126, 2);
-		if (csd_struct != 1 && csd_struct != 2)	{
-			printf("unrecognised CSD structure version %d\n",
-				csd_struct);
-			return EPERM;
-		}
-
-		csd->mmca_vsn	 = UNSTUFF_BITS(resp, 122, 4);
-		m = UNSTUFF_BITS(resp, 115, 4);
-		e = UNSTUFF_BITS(resp, 112, 3);
-		csd->tacc_ns   = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
-		csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
-
-		m = UNSTUFF_BITS(resp, 99, 4);
-		e = UNSTUFF_BITS(resp, 96, 3);
-		csd->max_dtr  = tran_exp[e] * tran_mant[m];
-		csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
-
-		e =	UNSTUFF_BITS(resp, 47, 3);
-		m =	UNSTUFF_BITS(resp, 62, 12);
-		csd->capacity = (1 + m) << (e + 2);
-
-		csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
-		csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
-		csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
-		csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
-		csd->r2w_factor	= UNSTUFF_BITS(resp, 26, 3);
-		csd->write_blkbits = UNSTUFF_BITS(resp,	22, 4);
-		csd->write_partial = UNSTUFF_BITS(resp,	21, 1);
-
-		mmc_dev.if_type = IF_TYPE_MMC;
-
-		mmc_dev.lba = csd->capacity;
-		mmc_dev.blksz = 1 << csd->read_blkbits;
-		mmc_dev.part_type = PART_TYPE_DOS;
-		mmc_dev.dev = 0;
-		mmc_dev.lun = 0;
-		mmc_dev.type = DEV_TYPE_HARDDISK;
-		mmc_dev.removable = 0;
-		mmc_dev.block_read  = mmc_bread;
-		mmc_dev.block_write = mmc_bwrite;
-
-		break;
-
-	case MMC_TYPE_SD:
-		csd_struct = UNSTUFF_BITS(resp,	126, 2);
-
-		switch (csd_struct) {
-		case 0:
-			m = UNSTUFF_BITS(resp, 115, 4);
-			e = UNSTUFF_BITS(resp, 112, 3);
-			csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9)	/ 10;
-			csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
-
-			m = UNSTUFF_BITS(resp, 99, 4);
-			e = UNSTUFF_BITS(resp, 96, 3);
-			csd->max_dtr = tran_exp[e] * tran_mant[m];
-			csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
-
-			e = UNSTUFF_BITS(resp, 47, 3);
-			m = UNSTUFF_BITS(resp, 62, 12);
-			csd->capacity = (1 + m) << (e + 2);
-
-			csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
-			csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
-			csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
-			csd->read_misalign = UNSTUFF_BITS(resp,	77, 1);
-			csd->r2w_factor	= UNSTUFF_BITS(resp, 26, 3);
-			csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
-			csd->write_partial = UNSTUFF_BITS(resp,	21, 1);
-
-			mmc_dev.if_type = IF_TYPE_SD;
-
-			mmc_dev.lba = csd->capacity;
-			mmc_dev.blksz = 1 << csd->read_blkbits;
-			mmc_dev.part_type = PART_TYPE_DOS;
-			mmc_dev.dev = 0;
-			mmc_dev.lun = 0;
-			mmc_dev.type = DEV_TYPE_HARDDISK;
-			mmc_dev.removable = 0;
-			mmc_dev.block_read  = mmc_bread;
-			mmc_dev.block_write = mmc_bwrite;
-
-			break;
-		case 1:
-			/*
-			 * This	is a block-addressed SDHC card.	Most
-			 * interesting fields are unused and have fixed
-			 * values. To avoid getting tripped by buggy cards,
-			 * we assume those fixed values	ourselves.
-			 */
-			mmc_card_set_blockaddr(card);
-
-			csd->tacc_ns   = 0; /* Unused */
-			csd->tacc_clks = 0; /* Unused */
-
-			m = UNSTUFF_BITS(resp, 99, 4);
-			e = UNSTUFF_BITS(resp, 96, 3);
-			csd->max_dtr  = tran_exp[e] * tran_mant[m];
-			csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
-
-			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;
-
-			mmc_dev.if_type = IF_TYPE_SD;
-
-			mmc_dev.lba = csd->capacity;
-			mmc_dev.blksz = 512;
-			mmc_dev.part_type = PART_TYPE_DOS;
-			mmc_dev.dev = 0;
-			mmc_dev.lun = 0;
-			mmc_dev.type = DEV_TYPE_HARDDISK;
-			mmc_dev.removable = 0;
-			mmc_dev.block_read = mmc_bread;
-
-			break;
-		default:
-			printf("unrecognised CSD structure version %d\n",
-					csd_struct);
-			return EPERM;
-		}
-		break;
-
-	default:
-		printf("unknown	card type!\n");
-		return EPERM;
-		}
-
-	debug("Exit: mmc_decode_csd\n");
-
-	return 0;
-}
-
-/*
- * Do SD voltage validation.
- */
-static s32 sd_voltage_validation(void)
-{
-	struct mmc_command stCmd;
-	u32 u32OcrVal =	0;
-	u32 u32VoltageValidation = EPERM;
-	s32 s32Rslt	= EPERM;
-	s32 s32Retries = 0;
-	/* Supported arguments for CMD8 */
-	const u32 sd_if_cmd_arg[SD_IF_CMD_ARG_COUNT] = {
-		SD_IF_HV_COND_ARG,
-		SD_IF_LV_COND_ARG };
-	const u32 sd_ocr_value[SD_OCR_VALUE_COUNT] = {
-		SD_OCR_VALUE_HV_HC,
-		SD_OCR_VALUE_LV_HC,
-		SD_OCR_VALUE_HV_LC };
-
-	debug("Entry: sd_voltage_validation\n");
-
-	memset(&stCmd, 0, sizeof(struct	mmc_command));
-
-	for (s32Retries = 0; s32Retries < SD_IF_CMD_ARG_COUNT; ++s32Retries) {
-		/* Configure CMD55 for SD card */
-		/* This	command	expects	defualt	RCA 0x0000 as argument.*/
-		s32Rslt	= mmc_cmd(&stCmd,
-				SD_SEND_IF_COND,
-				sd_if_cmd_arg[s32Retries],
-				READ,
-				RESPONSE_48,
-				DATA_PRESENT_NONE,
-				ENABLE,
-				ENABLE);
-
-		if (!s32Rslt) {
-			if (sd_if_cmd_arg[s32Retries] == \
-			(stCmd.resp.cmd_rsp0 & sd_if_cmd_arg[s32Retries])) {
-				u32OcrVal = sd_ocr_value[s32Retries];
-			} else {
-				u32OcrVal = 0;
-			}
-			break;
-		}
-	}
-
-	if (s32Rslt) {
-		debug("Card is of SD-1.x spec with LC\n");
-		u32OcrVal = SD_OCR_VALUE_HV_LC;
-	}
-
-	for (s32Retries = RETRY_TIMEOUT; s32Retries; --s32Retries) {
-		/* Configure ACMD41	for	SD card	*/
-		/* This	command	expects	operating voltage range	as argument.*/
-		s32Rslt	= mmc_acmd(&stCmd,
-				SD_APP_OP_COND,
-				u32OcrVal,
-				READ,
-				RESPONSE_48,
-				DATA_PRESENT_NONE,
-				DISABLE,
-				DISABLE);
-
-		/* Issue ACMD41	to SD Memory card to determine OCR value */
-		if (s32Rslt == EPERM) {
-			debug("Send SD_APP_OP_COND Failed! :(\n");
-			break;
-		}
-
-		/* Obtain OCR value	from the response buffer
-		*/
-		u32OcrVal = stCmd.resp.cmd_rsp0;
-
-		/* Check if	card busy bit is cleared or	not	*/
-		if (!(u32OcrVal	& MMC_CARD_BUSY))
-			continue;
-
-		u32VoltageValidation = 0;
-
-		/* Check if volatge	lies in	range or not*/
-		g_Card_Address_Mode = (u32OcrVal & 0x40000000) ? \
-			 CARD_SUPPORT_SECT_MODE : CARD_SUPPORT_BYTE_MODE;
-		break;
-	}
-
-	debug("Exit: sd_voltage_validation\n");
-
-	return u32VoltageValidation;
-}
-
-/*
- * Do SD voltage validation.
- */
-static s32 mmc_voltage_validation(void)
-{
-	struct mmc_command stCmd;
-	u32 u32Respones	= 0;
-	u32 u32VoltageValidation = EPERM;
-	s32 s32Rslt = EPERM;
-	s32 s32Retries = 0;
-
-	debug("Entry: mmc_voltage_validation\n");
-
-	for (s32Retries = RETRY_TIMEOUT; s32Retries; --s32Retries) {
-		s32Rslt	= mmc_cmd(&stCmd,
-				MMC_SEND_OP_COND,
-				(u32)0x40FF8000,
-				READ,
-				RESPONSE_48,
-				DATA_PRESENT_NONE,
-				DISABLE,
-				DISABLE);
-
-		/* Issue CMD55 to SD Memory card*/
-		if (s32Rslt == EPERM) {
-			debug("Send MMC_SEND_OP_COND Failed! :(\n");
-			break;
-		}
-
-		/* Obtain OCR value from the response buffer
-		*/
-		u32Respones = stCmd.resp.cmd_rsp0;
-
-		/* Check if card busy bit is cleared or not */
-		if (!(u32Respones & MMC_CARD_BUSY)) {
-			debug("Card Busy!\n");
-			continue;
-		}
-
-		u32VoltageValidation = 0;
-
-		/* Check if volatge lies in range or not*/
-		if (0x40000000 == (u32Respones & 0x60000000)) {
-			debug("Address_mode: SECT_MODE\n");
-			g_Card_Address_Mode = CARD_SUPPORT_SECT_MODE;
-		} else {
-			debug("Address_mode: BYTE_MODE\n");
-			g_Card_Address_Mode = CARD_SUPPORT_BYTE_MODE;
-		}
-	}
-
-	debug("mmc_voltage_validation succeed! :)\n");
-
-	debug("Exit: mmc_voltage_validation\n");
-
-	return u32VoltageValidation;
-}
-
-static s32 mmc_send_cid(struct mmc_card *card)
-{
-	struct mmc_command stCmd;
-	s32 s32Rslt = EPERM;
-
-	debug("Entry: mmc_send_cid\n");
-
-	if (!card) {
-		debug("NULL card pointer!\n");
-		return EPERM;
-	}
-
-	memset(&stCmd, 0, sizeof(struct	mmc_command));
-
-	s32Rslt	= mmc_cmd(&stCmd,
-			MMC_ALL_SEND_CID,
-			0,
-			READ,
-			RESPONSE_136,
-			DATA_PRESENT_NONE,
-			ENABLE,
-			DISABLE);
-
-	/* Issue CMD55 to SD Memory card*/
-	if (s32Rslt) {
-		debug("Send MMC_ALL_SEND_CID Failed! :(\n");
-		return EPERM;
-	}
-
-	/*
-	card->raw_cid[0] = stCmd.resp.cmd_rsp0;
-	card->raw_cid[1] = stCmd.resp.cmd_rsp1;
-	card->raw_cid[2] = stCmd.resp.cmd_rsp2;
-	card->raw_cid[3] = stCmd.resp.cmd_rsp3;
-	*/
-
-	card->raw_cid[0] = (stCmd.resp.cmd_rsp3 << 8) | \
-				(stCmd.resp.cmd_rsp2 >> 24);
-	card->raw_cid[1] = (stCmd.resp.cmd_rsp2 << 8) | \
-				(stCmd.resp.cmd_rsp1 >> 24);
-	card->raw_cid[2] = (stCmd.resp.cmd_rsp1 << 8) | \
-				(stCmd.resp.cmd_rsp0 >> 24);
-	card->raw_cid[3] = stCmd.resp.cmd_rsp0 << 8;
-
-	debug("mmc_send_cid succeed! :)\n");
-
-	debug("Exit: mmc_send_cid\n");
-
-	return 0;
-}
-
-static s32 mmc_send_csd(struct mmc_card *card, u32 u32CardRCA)
-{
-	struct mmc_command stCmd;
-	s32 s32Rslt = EPERM;
-
-	debug("Entry: mmc_send_csd\n");
-
-	if (!card) {
-		debug("NULL card pointer!\n");
-		return s32Rslt;
-	}
-
-	memset(&stCmd, 0, sizeof(struct	mmc_command));
-
-	s32Rslt	= mmc_cmd(&stCmd,
-			MMC_SEND_CSD,
-			(u32CardRCA << 16),
-			READ,
-			RESPONSE_136,
-			DATA_PRESENT_NONE,
-			ENABLE,
-			DISABLE);
-
-	 /* Issue CMD55 to SD Memory card*/
-	 if (s32Rslt) {
-		debug("Send MMC_SEND_CSD Failed! :(\n");
-		return EPERM;
-	 }
-
-	 /*
-	card->raw_csd[0] = stCmd.resp.cmd_rsp0;
-	card->raw_csd[1] = stCmd.resp.cmd_rsp1;
-	card->raw_csd[2] = stCmd.resp.cmd_rsp2;
-	card->raw_csd[3] = stCmd.resp.cmd_rsp3;
-	*/
-
-	card->raw_csd[0] = (stCmd.resp.cmd_rsp3 << 8) | \
-				(stCmd.resp.cmd_rsp2 >> 24);
-	card->raw_csd[1] = (stCmd.resp.cmd_rsp2 << 8) | \
-				(stCmd.resp.cmd_rsp1 >> 24);
-	card->raw_csd[2] = (stCmd.resp.cmd_rsp1 << 8) | \
-				(stCmd.resp.cmd_rsp0 >> 24);
-	card->raw_csd[3] = stCmd.resp.cmd_rsp0 << 8;
-
-	debug("mmc_send_csd succeed! :)\n");
-
-	debug("Exit: mmc_send_csd\n");
-
-	return 0;
-}
-
-static s32 mmc_select_card(u32 card_rca)
-{
-	struct mmc_command stCmd;
-	s32 s32Rslt = EPERM;
-	u32 u32CardAddr = card_rca << 16;
-
-	debug("Entry: mmcsd_set_data_transfer_mode\n");
-
-	memset(&stCmd, 0, sizeof(struct	mmc_command));
-
-	s32Rslt	= mmc_cmd(&stCmd,
-			MMC_SELECT_CARD,
-			u32CardAddr,
-			READ,
-			RESPONSE_48,
-			DATA_PRESENT_NONE,
-			ENABLE,
-			ENABLE);
-	if (s32Rslt) {
-		debug("Send MMC_SELECT_CARD Failed! :(\n");
-		return EPERM;
-	}
-
-	debug("Exit mmcsd_set_data_transfer_mode\n");
-
-	return mmcsd_check_status(card_rca, 96, TRAN, R1_ERROR);
-}
-
-static s32 mmcsd_check_status(u32 card_rca, u32 timeout, \
-				u32 card_state, u32 status_bit)
-{
-	struct mmc_command stCmd;
-	s32 s32Rslt = EPERM;
-	s32 s32Retries = 0;
-	u32 u32CardAddr	= card_rca << 16;
-	s32 s32Status =	1;
-
-	debug("Entry: mmcsd_check_status\n");
-
-	memset(&stCmd, 0, sizeof(struct	mmc_command));
-
-	for (s32Retries = 10; s32Retries; --s32Retries)	{
-
-		udelay(timeout);
-
-		s32Rslt	= mmc_cmd(&stCmd,
-			MMC_SEND_STATUS,
-			u32CardAddr,
-			READ,
-			RESPONSE_48,
-			DATA_PRESENT_NONE,
-			ENABLE,
-			ENABLE);
-		if (s32Rslt) {
-			debug("Send MMC_SEND_STATUS Failed!	:(\n");
-			break;
-		}
-
-		if (stCmd.resp.cmd_rsp0 & status_bit) {
-			debug("R1 Error! :(\n");
-			break;
-		}
-
-		if (R1_CURRENT_STATE(stCmd.resp.cmd_rsp0) == card_state) {
-			debug("Get state! :)\n");
-			s32Status = 0;
-			break;
-		}
-	}
-
-	debug("Exit: mmcsd_check_status\n");
-
-	return s32Status;
-}
-
-static s32 mmc_send_relative_addr(u32 *u32CardRCA)
-{
-	struct mmc_command stCmd;
-	s32 s32Status = 1;
-	s32	s32Rslt	= EPERM;
-
-	debug("Entry: mmc_send_relative_addr\n");
-
-	memset(&stCmd, 0, sizeof(struct	mmc_command));
-
-	s32Rslt	= mmc_cmd(&stCmd,
-			SD_SEND_RELATIVE_ADDR,
-			0,
-			READ,
-			RESPONSE_48,
-			DATA_PRESENT_NONE,
-			ENABLE,
-			ENABLE);
-	if (s32Rslt) {
-		debug("Send SD_SEND_RELATIVE_ADDR Failed! :(\n");
-		return s32Status;
-	}
-
-	*u32CardRCA = (u32)stCmd.resp.cmd_rsp0 >> 16;
-
-	if (R1_CURRENT_STATE(stCmd.resp.cmd_rsp0) != IDENT) {
-		debug("Invalid R1 State! :(\n");
-		return s32Status;
-	}
-
-	debug("Exit: mmc_send_relative_addr\n");
-
-	return 0;
-}
-
-static s32 mmc_set_relative_addr(u32 u32CardRCA)
-{
-	struct mmc_command stCmd;
-	s32	s32Rslt	= EPERM;
-
-	debug("Entry: mmc_set_relative_addr\n");
-
-	memset(&stCmd, 0, sizeof(struct	mmc_command));
-
-	/* Set RCA */
-	s32Rslt	= mmc_cmd(&stCmd,
-			MMC_SET_RELATIVE_ADDR,
-			(u32CardRCA	<< 16),
-			READ,
-			RESPONSE_48,
-			DATA_PRESENT_NONE,
-			ENABLE,
-			ENABLE);
-	if (s32Rslt) {
-		debug("Send MMC_SET_RELATIVE_ADDR Failed! :(\n");
-		return 1;
-	}
-
-	if (R1_CURRENT_STATE(stCmd.resp.cmd_rsp0) != IDENT) {
-		debug("Invalid R1 State! :(\n");
-		return 1;
-	}
-
-	debug("Exit: mmc_set_relative_addr\n");
-
-	return 0;
-}
-
-static s32 mmc_send_scr(struct mmc_card *card)
-{
-	struct mmc_command stCmd;
-	s32 s32Rslt = EPERM;
-
-	debug("Entry: mmc_app_send_scr\n");
-
-	if (!card) {
-		debug("NULL card pointer!\n");
-		return s32Rslt;
-	}
-
-	memset(&stCmd, 0, sizeof(struct	mmc_command));
-
-	s32Rslt	= mmc_acmd(&stCmd,
-			SD_APP_SEND_SCR,
-			0,
-			READ,
-			RESPONSE_48,
-			DATA_PRESENT_NONE,
-			ENABLE,
-			ENABLE);
-
-	 /* Issue CMD55 to SD Memory card*/
-	 if (s32Rslt) {
-		debug("Send SD_APP_SEND_SCR Failed! :(\n");
-		return EPERM;
-	 }
-
-	card->raw_scr[0] = stCmd.resp.cmd_rsp0;
-	card->raw_scr[1] = stCmd.resp.cmd_rsp1;
-
-	mmc_decode_scr(card);
-
-	debug("mmc_send_scr succeed! :)\n");
-
-	debug("Exit: mmc_app_send_scr\n");
-
-	return 0;
-}
-
-static s32 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) {
-		printf("Unrecognised SCR structure version %d\n", scr_struct);
-		return 1;
-	}
-
-	scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
-	scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
-
-	return 0;
-}
-
-static s32 mmc_read_switch(struct mmc_card *card)
-{
-	u8 status[64] = { 0 };
-
-	if (card->scr.sda_vsn < SCR_SPEC_VER_1)
-		return 0;
-
-	if (!(card->csd.cmdclass & CCC_SWITCH)) {
-		printf("card lacks mandatory switch "
-			"function, performance might suffer.\n");
-		return 0;
-	}
-
-	if (mmc_sd_switch(card, 0, 0, 1, status)) {
-		/*
-		 * We all hosts that cannot perform the command
-		 * to fail more gracefully
-		 */
-		printf("problem reading switch "
-			"capabilities, performance might suffer.\n");
-
-		return 1;
-	}
-
-	if (status[13] & 0x02)
-		card->sw_caps.hs_max_dtr = 50000000;
-
-	return 0;
-}
-
-static s32 mmc_sd_switch(struct mmc_card *card, s32 mode, s32 group,
-						u8 value, u8 *resp)
-{
-	struct mmc_command stCmd;
-	s32 s32Rslt = EPERM;
-	u32 u32Args = 0;
-
-	debug("Entry: mmc_sd_switch\n");
-
-	if (!card) {
-		debug("NULL card pointer!\n");
-		return s32Rslt;
-	}
-
-	memset(&stCmd, 0, sizeof(struct	mmc_command));
-
-	u32Args = mode << 31 | 0x00FFFFFF;
-	u32Args &= ~(0xF << (group * 4));
-	u32Args |= value << (group * 4);
-
-	s32Rslt	= mmc_acmd(&stCmd,
-			SD_SWITCH,
-			u32Args,
-			READ,
-			RESPONSE_48,
-			DATA_PRESENT,
-			ENABLE,
-			ENABLE);
-
-	 /* Issue CMD55 to SD Memory card*/
-	 if (s32Rslt) {
-		debug("Send SD_SWITCH Failed! :(\n");
-		return EPERM;
-	 }
-
-	return 0;
-}
-
-static s32 mmc_app_set_bus_width(s32 width)
-{
-	struct mmc_command stCmd;
-	s32 s32Rslt = EPERM;
-
-	debug("Entry: mmc_app_set_bus_width\n");
-
-	memset(&stCmd, 0, sizeof(struct	mmc_command));
-
-	s32Rslt	= mmc_acmd(&stCmd,
-			SD_APP_SET_BUS_WIDTH,
-			width,
-			READ,
-			RESPONSE_48,
-			DATA_PRESENT_NONE,
-			ENABLE,
-			ENABLE);
-
-	if (s32Rslt) {
-		debug("Send SD_APP_SET_BUS_WIDTH Failed! :(\n");
-		return EPERM;
-	 }
-
-	debug("Exit: mmc_app_set_bus_width\n");
-
-	return 0;
-}
-
-static s32 mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value)
-{
-	struct mmc_command stCmd;
-	s32 s32Rslt = EPERM;
-	u32 u32Args = 0;
-
-	debug("Entry: mmc_sd_switch\n");
-
-	if (!card) {
-		debug("NULL card pointer!\n");
-		return s32Rslt;
-	}
-
-	memset(&stCmd, 0, sizeof(struct	mmc_command));
-
-	u32Args = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
-				(index << 16) | (value << 8) | set;
-
-	s32Rslt	= mmc_cmd(&stCmd,
-			MMC_SWITCH,
-			u32Args,
-			READ,
-			RESPONSE_48,
-			DATA_PRESENT_NONE,
-			ENABLE,
-			ENABLE);
-
-	/* Issue CMD55 to SD Memory card*/
-	if (s32Rslt) {
-		debug("Send SD_SWITCH Failed! :(\n");
-		return EPERM;
-	}
-
-	debug("Entry: mmc_sd_switch\n");
-
-	return 0;
-}
-
-
-static s32 mmc_init_sd(struct mmc_card *card)
-{
-	u32 u32CardRCA = 0;
-
-	if (mmc_send_cid(card)) {
-		debug("mmcsd_get_cid Failed! :(\n");
-		return 1;
-	}
-
-	if (mmc_send_relative_addr(&u32CardRCA)) {
-		debug("sd_send_relative_addr Failed! :(\n");
-		return 1;
-	}
-
-	if (mmc_send_csd(card, u32CardRCA)) {
-		debug("mmcsd_get_csd Failed! :(\n");
-		return 1;
-	}
-
-	g_Card_rca = u32CardRCA;
-
-	mmc_decode_csd(card);
-	mmc_decode_cid(card);
-
-	/* Enable operating	frequency */
-	interface_configure_clock(OPERATING_FREQ);
-
-	if (mmc_select_card(u32CardRCA)) {
-		debug("mmc_select_card Failed! :(\n");
-		return 1;
-	}
-
-	if (mmcsd_check_status(g_Card_rca, 96, TRAN, R1_ERROR)) {
-		debug("Can't wait for TRAN state! :(\n");
-		return EPERM;
-	}
-
-	if (mmc_set_blk_len(BLK_LEN)) {
-		debug("mmc_set_blk_len Failed! :(\n");
-		return EPERM;
-	}
-
-	/*
-	if (mmc_send_scr(card)) {
-		debug("mmc_send_scr Failed! :(\n");
-		return 1;
-	}
-	*/
-
-	if (mmc_app_set_bus_width(SD_BUS_WIDTH_4)) {
-		/* Try to set 1 bit mode */
-		if (mmc_app_set_bus_width(SD_BUS_WIDTH_1)) {
-			debug("mmc_app_set_bus_width Failed\n");
-			return EPERM;
-		}
-		interface_set_bus_width(SD_BUS_WIDTH_1);
-	} else {
-		interface_set_bus_width(SD_BUS_WIDTH_4);
-	}
-
-	return 0;
-}
-
-static s32 mmc_init_mmc(struct mmc_card *card)
-{
-	u32 u32CardRCA = 1;
-
-	/* mmc init */
-	if (mmc_send_cid(card)) {
-		debug("mmcsd_get_cid Failed! :(\n");
-		return 1;
-	}
-
-	/* Set RCA */
-	if (mmc_set_relative_addr(u32CardRCA)) {
-		debug("mmc_set_relative_addr Failed! :(\n");
-		return 1;
-	}
-
-	if (mmc_send_csd(card, u32CardRCA)) {
-		debug("mmcsd_get_csd Failed! :(\n");
-		return 1;
-	}
-
-	g_Card_rca = u32CardRCA;
-
-	mmc_decode_csd(card);
-	mmc_decode_cid(card);
-
-	/* Enable operating frequency */
-	interface_configure_clock(OPERATING_FREQ);
-
-	if (mmc_select_card(u32CardRCA)) {
-		debug("mmc_select_card Failed! :(\n");
-		return 1;
-	}
-
-	if (mmcsd_check_status(g_Card_rca, 96, TRAN, R1_ERROR)) {
-		debug("Can't wait for TRAN state! :(\n");
-		return EPERM;
-	}
-
-	if (mmc_set_blk_len(BLK_LEN)) {
-		debug("mmc_set_blk_len Failed! :(\n");
-		return 1;
-	}
-
-	if (card->csd.mmca_vsn >= CSD_SPEC_VER_4) {
-		if (mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
-			EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4)) {
-			debug("Switch card to 4 bits failed! :(\n");
-			return 1;
-		}
-		interface_set_bus_width(MMC_BUS_WIDTH_4);
-	}
-
-	return 0;
-}
-
-int
-/****************************************************/
-mmc_init(int verbose)
-/****************************************************/
-{
-	struct mmc_command stCmd;
-	s32	s32InitStatus =	-1;
-	struct mmc_card	card;
-	s32	s32Rslt	= EPERM;
-
-	debug("Entry: mmc_init\n");
-
-	memset(&stCmd, 0, sizeof(struct	mmc_command));
-	memset(&card, 0, sizeof(struct mmc_card));
-
-	g_Card_rca = 0;
-
-	/* Reset device	interface type */
-	mmc_dev.if_type	= IF_TYPE_UNKNOWN;
-
-	/* initialize Interface	Controller */
-	sdhc_init();
-
-	/* Software reset to Interface Controller */
-	if (interface_reset()) {
-		debug("interface_reset failed! :(\n");
-		return s32InitStatus;
-	}
-
-	/* Enable Identification Frequency */
-	interface_configure_clock(IDENTIFICATION_FREQ);
-
-	/* Software reset */
-	s32Rslt	= mmc_cmd(&stCmd,
-			MMC_GO_IDLE_STATE,
-			0,
-			READ,
-			RESPONSE_NONE,
-			DATA_PRESENT_NONE,
-			DISABLE,
-			DISABLE);
-
-	if (!sd_voltage_validation()) {
-		debug("SD Card Detected!\n");
-		card.type = MMC_TYPE_SD;
-
-		/* SD init */
-		if (mmc_init_sd(&card)) {
-			debug("mmc_init_sd Failed! :(\n");
-			return s32InitStatus;
-		}
-
-		s32InitStatus = 0;
-		mmc_ready = 1;
-	} else if (!mmc_voltage_validation()) {
-		debug("MMC Card	Detected!\n");
-		card.type = MMC_TYPE_MMC;
-
-		/* mmc init	*/
-		if (mmc_init_mmc(&card)) {
-			debug("mmc_init_mmc Failed! :(\n");
-			return s32InitStatus;
-		}
-
-		s32InitStatus = 0;
-		mmc_ready = 1;
-	} else {
-		mmc_ready = 0;
-		return s32InitStatus;
-	}
-
-	fat_register_device(&mmc_dev, 1); /* partitions start counting with 1 */
-
-	debug("Exit: mmc_init\n");
-
-	return s32InitStatus;
-}
-
-int mmc_ident(block_dev_desc_t *dev)
-{
-	return 0;
-}
-
-int mmc2info(ulong addr)
-{
-	u32 u32BaseAddr = 0;
-
-#if defined(CONFIG_MMC_BASE)
-	u32BaseAddr = CONFIG_MMC_BASE;
-#endif
-
-	if (addr >= CONFIG_MMC_BASE
-	    && addr < CONFIG_MMC_BASE + (mmc_dev.lba * mmc_dev.blksz)) {
-		return 1;
-	}
-	return 0;
-}
-
-#endif /* CONFIG_MMC */
-
diff --git a/drivers/mmc/imx_esdhc.c b/drivers/mmc/imx_esdhc.c
new file mode 100644
index 0000000000..776bb1f429
--- /dev/null
+++ b/drivers/mmc/imx_esdhc.c
@@ -0,0 +1,448 @@
+/*
+ * Copyright 2007, Freescale Semiconductor, Inc
+ * Andy Fleming
+ *
+ * Based vaguely on the pxa mmc code:
+ * (C) Copyright 2003
+ * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <common.h>
+#include <command.h>
+#include <hwconfig.h>
+#include <mmc.h>
+#include <part.h>
+#include <malloc.h>
+#include <mmc.h>
+#include <fsl_esdhc.h>
+#include <fdt_support.h>
+#include <asm/io.h>
+
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define SDHCI_IRQ_EN_BITS		(IRQSTATEN_CC | IRQSTATEN_TC | \
+				IRQSTATEN_BWR | IRQSTATEN_BRR | IRQSTATEN_CINT | \
+				IRQSTATEN_CTOE | IRQSTATEN_CCE | IRQSTATEN_CEBE | \
+				IRQSTATEN_CIE | IRQSTATEN_DTOE | IRQSTATEN_DCE | IRQSTATEN_DEBE)
+
+struct fsl_esdhc {
+	uint	dsaddr;
+	uint	blkattr;
+	uint	cmdarg;
+	uint	xfertyp;
+	uint	cmdrsp0;
+	uint	cmdrsp1;
+	uint	cmdrsp2;
+	uint	cmdrsp3;
+	uint	datport;
+	uint	prsstat;
+	uint	proctl;
+	uint	sysctl;
+	uint	irqstat;
+	uint	irqstaten;
+	uint	irqsigen;
+	uint	autoc12err;
+	uint	hostcapblt;
+	uint	wml;
+	char	reserved1[8];
+	uint	fevt;
+	char	reserved2[168];
+	uint	hostver;
+	char	reserved3[780];
+	uint	scr;
+};
+
+
+static inline void mdelay(unsigned long msec)
+{
+	unsigned long i;
+	for (i = 0; i < msec * 10; i++)
+		udelay(100);
+}
+
+static inline void sdelay(unsigned long sec)
+{
+	unsigned long i;
+	for (i = 0; i < sec * 10; i++)
+		mdelay(100);
+}
+
+/* Return the XFERTYP flags for a given command and data packet */
+uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
+{
+	uint xfertyp = 0;
+
+	if (data) {
+		xfertyp |= XFERTYP_DPSEL;
+
+		if (data->blocks > 1) {
+			xfertyp |= XFERTYP_MSBSEL;
+			xfertyp |= XFERTYP_BCEN;
+		}
+
+		if (data->flags & MMC_DATA_READ)
+			xfertyp |= XFERTYP_DTDSEL;
+	}
+
+	if (cmd->resp_type & MMC_RSP_CRC)
+		xfertyp |= XFERTYP_CCCEN;
+	if (cmd->resp_type & MMC_RSP_OPCODE)
+		xfertyp |= XFERTYP_CICEN;
+	if (cmd->resp_type & MMC_RSP_136)
+		xfertyp |= XFERTYP_RSPTYP_136;
+	else if (cmd->resp_type & MMC_RSP_BUSY)
+		xfertyp |= XFERTYP_RSPTYP_48_BUSY;
+	else if (cmd->resp_type & MMC_RSP_PRESENT)
+		xfertyp |= XFERTYP_RSPTYP_48;
+
+	return XFERTYP_CMD(cmd->cmdidx) | xfertyp;
+}
+
+static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
+{
+	uint wml_value;
+	int timeout;
+	u32 tmp;
+	struct fsl_esdhc *regs = mmc->priv;
+
+	wml_value = data->blocksize / 4;
+
+	if (wml_value > 0x80)
+		wml_value = 0x80;
+
+	if (!(data->flags & MMC_DATA_READ)) {
+		if ((readl(&regs->prsstat) & PRSSTAT_WPSPL) == 0) {
+			printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
+			return TIMEOUT;
+		}
+		wml_value = wml_value << 16;
+	}
+
+	writel(wml_value, &regs->wml);
+
+	writel(data->blocks << 16 | data->blocksize, &regs->blkattr);
+
+	/* Calculate the timeout period for data transactions */
+	/*
+	timeout = __ilog2(mmc->tran_speed/10);
+	timeout -= 13;
+
+	if (timeout > 14)
+		timeout = 14;
+
+	if (timeout < 0)
+		timeout = 0;
+	*/
+	timeout = 14;
+
+	tmp = (readl(&regs->sysctl) & (~SYSCTL_TIMEOUT_MASK)) | (timeout << 16);
+	writel(tmp, &regs->sysctl);
+
+	return 0;
+}
+
+
+/*
+ * Sends a command out on the bus.  Takes the mmc pointer,
+ * a command pointer, and an optional data pointer.
+ */
+static int
+esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
+{
+	uint	xfertyp;
+	uint	irqstat;
+	u32	tmp;
+	volatile struct fsl_esdhc *regs = mmc->priv;
+
+	writel(-1, &regs->irqstat);
+
+	sync();
+
+	tmp = readl(&regs->irqstaten) | SDHCI_IRQ_EN_BITS;
+	writel(tmp, &regs->irqstaten);
+
+	/* Wait for the bus to be idle */
+	while ((readl(&regs->prsstat) & PRSSTAT_CICHB) ||
+			(readl(&regs->prsstat) & PRSSTAT_CIDHB))
+			mdelay(1);
+
+	while (readl(&regs->prsstat) & PRSSTAT_DLA);
+
+	/* Wait at least 8 SD clock cycles before the next command */
+	/*
+	 * Note: This is way more than 8 cycles, but 1ms seems to
+	 * resolve timing issues with some cards
+	 */
+	mdelay(10);
+
+	/* Set up for a data transfer if we have one */
+	if (data) {
+		int err;
+
+		err = esdhc_setup_data(mmc, data);
+		if(err)
+			return err;
+	}
+
+	/* Figure out the transfer arguments */
+	xfertyp = esdhc_xfertyp(cmd, data);
+
+	/* Send the command */
+	writel(cmd->cmdarg, &regs->cmdarg);
+	writel(xfertyp, &regs->xfertyp);
+
+	mdelay(10);
+
+	/* Mask all irqs */
+	writel(0, &regs->irqsigen);
+
+	/* Wait for the command to complete */
+	while (!(readl(&regs->irqstat) & IRQSTAT_CC));
+
+	irqstat = readl(&regs->irqstat);
+	writel(irqstat, &regs->irqstat);
+
+	if (irqstat & CMD_ERR)
+		return COMM_ERR;
+
+	if (irqstat & IRQSTAT_CTOE)
+		return TIMEOUT;
+
+	/* Copy the response to the response buffer */
+	if (cmd->resp_type & MMC_RSP_136) {
+		u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
+
+		cmdrsp3 = readl(&regs->cmdrsp3);
+		cmdrsp2 = readl(&regs->cmdrsp2);
+		cmdrsp1 = readl(&regs->cmdrsp1);
+		cmdrsp0 = readl(&regs->cmdrsp0);
+		cmd->response[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24);
+		cmd->response[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24);
+		cmd->response[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24);
+		cmd->response[3] = (cmdrsp0 << 8);
+	} else
+		cmd->response[0] = readl(&regs->cmdrsp0);
+
+	/* Wait until all of the blocks are transferred */
+	if (data) {
+		int i = 0, j = 0;
+		u32 *tmp_ptr = NULL;
+		uint block_size = data->blocksize;
+		uint block_cnt = data->blocks;
+
+		tmp = readl(&regs->irqstaten) | SDHCI_IRQ_EN_BITS;
+		writel(tmp, &regs->irqstaten);
+
+		if (data->flags & MMC_DATA_READ) {
+			tmp_ptr = (u32 *)data->dest;
+
+			for (i = 0; i < (block_cnt); ++i) {
+				while (!(readl(&regs->irqstat) & IRQSTAT_BRR)) 
+					mdelay(1);
+
+				for (j = 0; j < (block_size >> 2); ++j, ++tmp_ptr) {
+					*tmp_ptr = readl(&regs->datport);
+				}
+
+				tmp = readl(&regs->irqstat) & (IRQSTAT_BRR);
+				writel(tmp, &regs->irqstat);
+			}
+		} else {
+			tmp_ptr = (u32 *)data->src;
+
+			for (i = 0; i < (block_cnt); ++i) {
+				while (!(readl(&regs->irqstat) & IRQSTAT_BWR)) 
+					mdelay(1);
+
+				for (j = 0; j < (block_size >> 2); ++j, ++tmp_ptr) {
+					writel(*tmp_ptr, &regs->datport);
+				}
+
+				tmp = readl(&regs->irqstat) & (IRQSTAT_BWR);
+				writel(tmp, &regs->irqstat);
+			}
+		}
+
+		while (!(readl(&regs->irqstat) & IRQSTAT_TC)) ;
+	}
+
+	writel(-1, &regs->irqstat);
+
+	return 0;
+}
+
+void set_sysctl(struct mmc *mmc, uint clock)
+{
+	int sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
+	int div, pre_div;
+	volatile struct fsl_esdhc *regs = mmc->priv;
+	uint clk;
+	u32 tmp;
+
+	if (sdhc_clk / 16 > clock) {
+		for (pre_div = 2; pre_div < 256; pre_div *= 2)
+			if ((sdhc_clk / pre_div) <= (clock * 16))
+				break;
+	} else
+		pre_div = 2;
+
+	for (div = 1; div <= 16; div++)
+		if ((sdhc_clk / (div * pre_div)) <= clock)
+			break;
+
+	pre_div >>= 1;
+	div -= 1;
+
+	clk = (pre_div << 8) | (div << 4);
+
+	tmp = readl(&regs->sysctl) & (~SYSCTL_SDCLKEN);
+	writel(tmp, &regs->sysctl);
+
+	tmp = (readl(&regs->sysctl) & (~SYSCTL_CLOCK_MASK)) | clk;
+	writel(tmp, &regs->sysctl);
+
+	mdelay(100);
+
+	while (!(readl(&regs->prsstat) & PRSSTAT_SDSTB)) ;
+
+	tmp = readl(&regs->sysctl) | (SYSCTL_SDCLKEN);
+	writel(tmp, &regs->sysctl);
+}
+
+static void esdhc_set_ios(struct mmc *mmc)
+{
+	struct fsl_esdhc *regs = mmc->priv;
+	u32 tmp;
+
+	/* Set the clock speed */
+	set_sysctl(mmc, mmc->clock);
+
+	/* Set the bus width */
+	tmp = readl(&regs->proctl) & (~(PROCTL_DTW_4 | PROCTL_DTW_8));
+	writel(tmp, &regs->proctl);
+
+	if (mmc->bus_width == 4) {
+		tmp = readl(&regs->proctl) | PROCTL_DTW_4;
+		writel(tmp, &regs->proctl);
+	} else if (mmc->bus_width == 8) {
+		tmp = readl(&regs->proctl) | PROCTL_DTW_8;
+		writel(tmp, &regs->proctl);
+	}
+}
+
+static int esdhc_init(struct mmc *mmc)
+{
+	struct fsl_esdhc *regs = mmc->priv;
+	int timeout = 1000;
+	u32 tmp;
+
+	/* Reset the eSDHC by writing 1 to RSTA bit of SYSCTRL Register */
+	tmp = readl(&regs->sysctl) | SYSCTL_RSTA;
+	writel(tmp, &regs->sysctl);
+
+	while (readl(&regs->sysctl) & SYSCTL_RSTA)
+	    mdelay(1);
+
+	/* Set the initial clock speed */
+	set_sysctl(mmc, 400000);
+
+	/* Put the PROCTL reg back to the default */
+	writel(PROCTL_INIT | PROCTL_D3CD, &regs->proctl);
+
+	/* FIXME: For our CINS bit doesn't work. So this section is disabled. */
+
+	while (!(readl(&regs->prsstat) & PRSSTAT_CINS) && --timeout)
+		mdelay(1);
+
+	if (timeout <= 0) {
+		printf("No MMC card detected!\n");
+		return NO_CARD_ERR;
+	}
+
+
+	set_sysctl(mmc, 400000);
+
+	tmp = readl(&regs->sysctl) | SYSCTL_INITA;
+	writel(tmp, &regs->sysctl);
+
+	while (readl(&regs->sysctl) & SYSCTL_INITA)
+		mdelay(1);
+
+	return 0;
+}
+
+#ifndef CONFIG_SYS_FSL_ESDHC_ADDR
+extern u32 *imx_esdhc_base_addr;
+#endif
+
+static int esdhc_initialize(bd_t *bis)
+{
+#ifdef CONFIG_SYS_FSL_ESDHC_ADDR
+	struct fsl_esdhc *regs = (struct fsl_esdhc *)CONFIG_SYS_IMX_ESDHC_ADDR;
+#else
+	struct fsl_esdhc *regs = (struct fsl_esdhc *)imx_esdhc_base_addr;
+#endif
+	struct mmc *mmc;
+	u32 caps;
+
+	mmc = malloc(sizeof(struct mmc));
+
+	sprintf(mmc->name, "FSL_ESDHC");
+	mmc->priv = regs;
+	mmc->send_cmd = esdhc_send_cmd;
+	mmc->set_ios = esdhc_set_ios;
+	mmc->init = esdhc_init;
+
+	/*
+	caps = regs->hostcapblt;
+
+	if (caps & ESDHC_HOSTCAPBLT_VS18)
+		mmc->voltages |= MMC_VDD_165_195;
+	if (caps & ESDHC_HOSTCAPBLT_VS30)
+		mmc->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31;
+	if (caps & ESDHC_HOSTCAPBLT_VS33) {
+		mmc->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34;
+	}
+	*/
+	mmc->voltages = MMC_VDD_35_36 | MMC_VDD_34_35 | MMC_VDD_33_34 |
+			MMC_VDD_32_33 | MMC_VDD_31_32 | MMC_VDD_30_31 |
+			MMC_VDD_29_30 | MMC_VDD_28_29 | MMC_VDD_27_28;
+
+	mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
+
+	if (caps & ESDHC_HOSTCAPBLT_HSS)
+		mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
+
+	mmc->f_min = 400000;
+	mmc->f_max = MIN(mxc_get_clock(MXC_ESDHC_CLK), 50000000);
+
+	mmc_register(mmc);
+
+	return 0;
+}
+
+int fsl_esdhc_mmc_init(bd_t *bis)
+{
+	return esdhc_initialize(bis);
+}
+
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index b69ce152a8..dcc9548aef 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -88,7 +88,7 @@ mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
 	err = mmc_set_blocklen(mmc, mmc->write_bl_len);
 
 	if (err) {
-		printf("set write bl len failed\n\r");
+		puts("set write bl len failed\n\r");
 		return err;
 	}
 
@@ -113,7 +113,7 @@ mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
 	err = mmc_send_cmd(mmc, &cmd, &data);
 
 	if (err) {
-		printf("mmc write failed\n\r");
+		puts("mmc write failed\n\r");
 		return err;
 	}
 
@@ -164,7 +164,7 @@ int mmc_read(struct mmc *mmc, u64 src, uchar *dst, int size)
 	buffer = malloc(blklen);
 
 	if (!buffer) {
-		printf("Could not allocate buffer for MMC read!\n");
+		puts("Could not allocate buffer for MMC read!\n");
 		return -1;
 	}
 
@@ -205,27 +205,56 @@ free_buffer:
 
 static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
 {
+	struct mmc_cmd cmd;
+	struct mmc_data data;
 	int err;
-	int i;
+	int stoperr = 0;
 	struct mmc *mmc = find_mmc_device(dev_num);
+	int blklen;
 
 	if (!mmc)
-		return 0;
+		return -1;
 
-	/* We always do full block reads from the card */
-	err = mmc_set_blocklen(mmc, mmc->read_bl_len);
+	blklen = mmc->read_bl_len;
+
+	err = mmc_set_blocklen(mmc, blklen);
 
 	if (err) {
-		return 0;
+		puts("set read bl len failed\n\r");
+		return err;
 	}
 
-	for (i = start; i < start + blkcnt; i++, dst += mmc->read_bl_len) {
-		err = mmc_read_block(mmc, dst, i);
+	if (blkcnt > 1)
+		cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
+	else
+		cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
 
-		if (err) {
-			printf("block read failed: %d\n", err);
-			return i - start;
-		}
+	if (mmc->high_capacity)
+		cmd.cmdarg = start;
+	else
+		cmd.cmdarg = start * blklen;
+
+	cmd.resp_type = MMC_RSP_R1;
+	cmd.flags = 0;
+
+	data.dest = dst;
+	data.blocks = blkcnt;
+	data.blocksize = blklen;
+	data.flags = MMC_DATA_READ;
+
+	err = mmc_send_cmd(mmc, &cmd, &data);
+
+	if (err) {
+		puts("mmc read failed\n\r");
+		return err;
+	}
+
+	if (blkcnt > 1) {
+		cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
+		cmd.cmdarg = 0;
+		cmd.resp_type = MMC_RSP_R1b;
+		cmd.flags = 0;
+		stoperr = mmc_send_cmd(mmc, &cmd, NULL);
 	}
 
 	return blkcnt;