/*
 * Copyright 2008, Freescale Semiconductor, Inc
 * Andy Fleming
 *
 * Based vaguely on the Linux code
 *
 * 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 <mmc.h>
#include <part.h>
#include <malloc.h>
#include <linux/list.h>
#include <div64.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")));

static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
                        struct mmc_data *data)
{
        struct mmc_data backup;
        int ret;

        memset(&backup, 0, sizeof(backup));

#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;
}

static 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) {
                                printf("Status Error: 0x%08X\n",
                                        cmd.response[0]);
                                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) {
                printf("Timeout waiting card ready\n");
                return TIMEOUT;
        }

        return 0;
}

static 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;

        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;
        }

        printf("MMC Device %d not found\n", dev_num);

        return NULL;
}

static ulong mmc_erase_t(struct mmc *mmc, ulong start, lbaint_t blkcnt)
{
        struct mmc_cmd cmd;
        ulong end;
        int err, start_cmd, end_cmd;

        if (mmc->high_capacity)
                end = start + blkcnt - 1;
        else {
                end = (start + blkcnt - 1) * mmc->write_bl_len;
                start *= mmc->write_bl_len;
        }

        if (IS_SD(mmc)) {
                start_cmd = SD_CMD_ERASE_WR_BLK_START;
                end_cmd = SD_CMD_ERASE_WR_BLK_END;
        } else {
                start_cmd = MMC_CMD_ERASE_GROUP_START;
                end_cmd = MMC_CMD_ERASE_GROUP_END;
        }

        cmd.cmdidx = start_cmd;
        cmd.cmdarg = start;
        cmd.resp_type = MMC_RSP_R1;

        err = mmc_send_cmd(mmc, &cmd, NULL);
        if (err)
                goto err_out;

        cmd.cmdidx = end_cmd;
        cmd.cmdarg = end;

        err = mmc_send_cmd(mmc, &cmd, NULL);
        if (err)
                goto err_out;

        cmd.cmdidx = MMC_CMD_ERASE;
        cmd.cmdarg = SECURE_ERASE;
        cmd.resp_type = MMC_RSP_R1b;

        err = mmc_send_cmd(mmc, &cmd, NULL);
        if (err)
                goto err_out;

        return 0;

err_out:
        puts("mmc erase failed\n");
        return err;
}

static unsigned long
mmc_berase(int dev_num, lbaint_t start, lbaint_t blkcnt)
{
        int err = 0;
        struct mmc *mmc = find_mmc_device(dev_num);
        lbaint_t blk = 0, blk_r = 0;
        int timeout = 1000;

        if (!mmc)
                return -1;

        if ((start % mmc->erase_grp_size) || (blkcnt % mmc->erase_grp_size))
                printf("\n\nCaution! Your devices Erase group is 0x%x\n"
                       "The erase range would be change to "
                       "0x" LBAF "~0x" LBAF "\n\n",
                       mmc->erase_grp_size, start & ~(mmc->erase_grp_size - 1),
                       ((start + blkcnt + mmc->erase_grp_size)
                       & ~(mmc->erase_grp_size - 1)) - 1);

        while (blk < blkcnt) {
                blk_r = ((blkcnt - blk) > mmc->erase_grp_size) ?
                        mmc->erase_grp_size : (blkcnt - blk);
                err = mmc_erase_t(mmc, start + blk, blk_r);
                if (err)
                        break;

                blk += blk_r;

                /* Waiting for the ready status */
                if (mmc_send_status(mmc, timeout))
                        return 0;
        }

        return blk;
}

static ulong
mmc_write_blocks(struct mmc *mmc, lbaint_t start, lbaint_t blkcnt, const void*src)
{
        struct mmc_cmd cmd;
        struct mmc_data data;
        int timeout = 1000;

        if ((start + blkcnt) > mmc->block_dev.lba) {
                printf("MMC: block number 0x" LBAF " exceeds max(0x" LBAF ")\n",
                        start + blkcnt, mmc->block_dev.lba);
                return 0;
        }

        if (blkcnt == 0)
                return 0;
        else if (blkcnt == 1)
                cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
        else
                cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;

        if (mmc->high_capacity)
                cmd.cmdarg = start;
        else
                cmd.cmdarg = start * mmc->write_bl_len;

        cmd.resp_type = MMC_RSP_R1;

        data.src = src;
        data.blocks = blkcnt;
        data.blocksize = mmc->write_bl_len;
        data.flags = MMC_DATA_WRITE;

        if (mmc_send_cmd(mmc, &cmd, &data)) {
                printf("mmc write failed\n");
                return 0;
        }

        /* SPI multiblock writes terminate using a special
         * token, not a STOP_TRANSMISSION request.
         */
        if (!mmc_host_is_spi(mmc) && blkcnt > 1) {
                cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
                cmd.cmdarg = 0;
                cmd.resp_type = MMC_RSP_R1b;
                if (mmc_send_cmd(mmc, &cmd, NULL)) {
                        printf("mmc fail to send stop cmd\n");
                        return 0;
                }
        }

        /* Waiting for the ready status */
        if (mmc_send_status(mmc, timeout))
                return 0;

        return blkcnt;
}

static ulong
mmc_bwrite(int dev_num, lbaint_t start, lbaint_t blkcnt, const void*src)
{
        lbaint_t cur, blocks_todo = blkcnt;

        struct mmc *mmc = find_mmc_device(dev_num);
        if (!mmc)
                return 0;

        if (mmc_set_blocklen(mmc, mmc->write_bl_len))
                return 0;

        do {
                cur = (blocks_todo > mmc->b_max) ?  mmc->b_max : blocks_todo;
                if(mmc_write_blocks(mmc, start, cur, src) != cur)
                        return 0;
                blocks_todo -= cur;
                start += cur;
                src += cur * mmc->write_bl_len;
        } while (blocks_todo > 0);

        return blkcnt;
}

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)) {
                        printf("mmc fail to send stop cmd\n");
                        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) {
                printf("MMC: block number 0x" LBAF " exceeds max(0x" LBAF ")\n",
                        start + blkcnt, mmc->block_dev.lba);
                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);
}

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->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;

        /* 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;
                }

                /*
                 * Check whether GROUP_DEF is set, if yes, read out
                 * group size from ext_csd directly, or calculate
                 * the group size from the csd value.
                 */
                if (ext_csd[EXT_CSD_ERASE_GROUP_DEF]) {
                        mmc->erase_grp_size =
                                ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] *
                                        MMC_MAX_BLOCK_LEN * 1024;
                } else {
                        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);
        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);
#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;
}

int mmc_register(struct mmc *mmc)
{
        /* 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;
        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;
                printf("MMC: no card present\n");
                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);

        /* 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) {
                        printf("Card did not respond to voltage select!\n");
                        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;
}

/*
 * 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")));

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");
}

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);

        print_mmc_devices(',');

        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