mmc.c

	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;
	bool has_parts = false;
	bool part_completed;

#ifdef CONFIG_MMC_SPI_CRC_ON
	if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
		cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
		cmd.resp_type = MMC_RSP_R1;
		cmd.cmdarg = 1;
		err = mmc_send_cmd(mmc, &cmd, NULL);

		if (err)
			return err;
	}
#endif

	/* Put the Card in Identify Mode */
	cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
		MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
	cmd.resp_type = MMC_RSP_R2;
	cmd.cmdarg = 0;

	err = mmc_send_cmd(mmc, &cmd, NULL);

	if (err)
		return err;

	memcpy(mmc->cid, cmd.response, 16);

	/*
	 * For MMC cards, set the Relative Address.
	 * For SD cards, get the Relatvie Address.
	 * This also puts the cards into Standby State
	 */
	if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
		cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
		cmd.cmdarg = mmc->rca << 16;
		cmd.resp_type = MMC_RSP_R6;

		err = mmc_send_cmd(mmc, &cmd, NULL);

		if (err)
			return err;

		if (IS_SD(mmc))
			mmc->rca = (cmd.response[0] >> 16) & 0xffff;
	}

	/* Get the Card-Specific Data */
	cmd.cmdidx = MMC_CMD_SEND_CSD;
	cmd.resp_type = MMC_RSP_R2;
	cmd.cmdarg = mmc->rca << 16;

	err = mmc_send_cmd(mmc, &cmd, NULL);

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

	if (err)
		return err;

	mmc->csd[0] = cmd.response[0];
	mmc->csd[1] = cmd.response[1];
	mmc->csd[2] = cmd.response[2];
	mmc->csd[3] = cmd.response[3];

	if (mmc->version == MMC_VERSION_UNKNOWN) {
		int version = (cmd.response[0] >> 26) & 0xf;

		switch (version) {
			case 0:
				mmc->version = MMC_VERSION_1_2;
				break;
			case 1:
				mmc->version = MMC_VERSION_1_4;
				break;
			case 2:
				mmc->version = MMC_VERSION_2_2;
				break;
			case 3:
				mmc->version = MMC_VERSION_3;
				break;
			case 4:
				mmc->version = MMC_VERSION_4;
				break;
			default:
				mmc->version = MMC_VERSION_1_2;
				break;
		}
	}

	/* divide frequency by 10, since the mults are 10x bigger */
	freq = fbase[(cmd.response[0] & 0x7)];
	mult = multipliers[((cmd.response[0] >> 3) & 0xf)];

	mmc->tran_speed = freq * mult;

	mmc->dsr_imp = ((cmd.response[1] >> 12) & 0x1);
	mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);

	if (IS_SD(mmc))
		mmc->write_bl_len = mmc->read_bl_len;
	else
		mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);

	if (mmc->high_capacity) {
		csize = (mmc->csd[1] & 0x3f) << 16
			| (mmc->csd[2] & 0xffff0000) >> 16;
		cmult = 8;
	} else {
		csize = (mmc->csd[1] & 0x3ff) << 2
			| (mmc->csd[2] & 0xc0000000) >> 30;
		cmult = (mmc->csd[2] & 0x00038000) >> 15;
	}

	mmc->capacity_user = (csize + 1) << (cmult + 2);
	mmc->capacity_user *= mmc->read_bl_len;
	mmc->capacity_boot = 0;
	mmc->capacity_rpmb = 0;
	for (i = 0; i < 4; i++)
		mmc->capacity_gp[i] = 0;

	if (mmc->read_bl_len > MMC_MAX_BLOCK_LEN)
		mmc->read_bl_len = MMC_MAX_BLOCK_LEN;

	if (mmc->write_bl_len > MMC_MAX_BLOCK_LEN)
		mmc->write_bl_len = MMC_MAX_BLOCK_LEN;

	if ((mmc->dsr_imp) && (0xffffffff != mmc->dsr)) {
		cmd.cmdidx = MMC_CMD_SET_DSR;
		cmd.cmdarg = (mmc->dsr & 0xffff) << 16;
		cmd.resp_type = MMC_RSP_NONE;
		if (mmc_send_cmd(mmc, &cmd, NULL))
			printf("MMC: SET_DSR failed\n");
	}

	/* Select the card, and put it into Transfer Mode */
	if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
		cmd.cmdidx = MMC_CMD_SELECT_CARD;
		cmd.resp_type = MMC_RSP_R1;
		cmd.cmdarg = mmc->rca << 16;
		err = mmc_send_cmd(mmc, &cmd, NULL);

		if (err)
			return err;
	}

	/*
	 * For SD, its erase group is always one sector
	 */
	mmc->erase_grp_size = 1;
	mmc->part_config = MMCPART_NOAVAILABLE;
	if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
		/* check  ext_csd version and capacity */
		err = mmc_send_ext_csd(mmc, ext_csd);
		if (err)
			return err;
		if (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;
		case 7:
			mmc->version = MMC_VERSION_5_0;
			break;
		}

		/* The partition data may be non-zero but it is only
		 * effective if PARTITION_SETTING_COMPLETED is set in
		 * EXT_CSD, so ignore any data if this bit is not set,
		 * except for enabling the high-capacity group size
		 * definition (see below). */
		part_completed = !!(ext_csd[EXT_CSD_PARTITION_SETTING] &
				    EXT_CSD_PARTITION_SETTING_COMPLETED);

		/* store the partition info of emmc */
		mmc->part_support = ext_csd[EXT_CSD_PARTITIONING_SUPPORT];
		if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) ||
		    ext_csd[EXT_CSD_BOOT_MULT])
			mmc->part_config = ext_csd[EXT_CSD_PART_CONF];
		if (part_completed &&
		    (ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & ENHNCD_SUPPORT))
			mmc->part_attr = ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE];

		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;
			uint mult = (ext_csd[idx + 2] << 16) +
				(ext_csd[idx + 1] << 8) + ext_csd[idx];
			if (mult)
				has_parts = true;
			if (!part_completed)
				continue;
			mmc->capacity_gp[i] = mult;
			mmc->capacity_gp[i] *=
				ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
			mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
			mmc->capacity_gp[i] <<= 19;
		}

		if (part_completed) {
			mmc->enh_user_size =
				(ext_csd[EXT_CSD_ENH_SIZE_MULT+2] << 16) +
				(ext_csd[EXT_CSD_ENH_SIZE_MULT+1] << 8) +
				ext_csd[EXT_CSD_ENH_SIZE_MULT];
			mmc->enh_user_size *= ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
			mmc->enh_user_size *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
			mmc->enh_user_size <<= 19;
			mmc->enh_user_start =
				(ext_csd[EXT_CSD_ENH_START_ADDR+3] << 24) +
				(ext_csd[EXT_CSD_ENH_START_ADDR+2] << 16) +
				(ext_csd[EXT_CSD_ENH_START_ADDR+1] << 8) +
				ext_csd[EXT_CSD_ENH_START_ADDR];
			if (mmc->high_capacity)
				mmc->enh_user_start <<= 9;
		}

		/*
		 * Host needs to enable ERASE_GRP_DEF bit if device is
		 * partitioned. This bit will be lost every time after a reset
		 * or power off. This will affect erase size.
		 */
		if (part_completed)
			has_parts = true;
		if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) &&
		    (ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE] & PART_ENH_ATTRIB))
			has_parts = true;
		if (has_parts) {
			err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
				EXT_CSD_ERASE_GROUP_DEF, 1);

			if (err)
				return err;
			else
				ext_csd[EXT_CSD_ERASE_GROUP_DEF] = 1;
		}

		if (ext_csd[EXT_CSD_ERASE_GROUP_DEF] & 0x01) {
			/* Read out group size from ext_csd */
			mmc->erase_grp_size =
				ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 1024;
			/*
			 * if high capacity and partition setting completed
			 * SEC_COUNT is valid even if it is smaller than 2 GiB
			 * JEDEC Standard JESD84-B45, 6.2.4
			 */
			if (mmc->high_capacity && part_completed) {
				capacity = (ext_csd[EXT_CSD_SEC_CNT]) |
					(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;
				mmc->capacity_user = capacity;
			}
		} else {
			/* Calculate the group size from the csd value. */
			int erase_gsz, erase_gmul;
			erase_gsz = (mmc->csd[2] & 0x00007c00) >> 10;
			erase_gmul = (mmc->csd[2] & 0x000003e0) >> 5;
			mmc->erase_grp_size = (erase_gsz + 1)
				* (erase_gmul + 1);
		}

		mmc->hc_wp_grp_size = 1024
			* ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]
			* 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->cfg->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_DDR_BUS_WIDTH_8,
			EXT_CSD_DDR_BUS_WIDTH_4,
			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_DDR_BUS_WIDTH_4] =
				MMC_MODE_DDR_52MHz | MMC_MODE_4BIT,
			[EXT_CSD_DDR_BUS_WIDTH_8] =
				MMC_MODE_DDR_52MHz | MMC_MODE_8BIT,
			[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, 8, 4, 1,
		};

		for (idx=0; idx < ARRAY_SIZE(ext_csd_bits); idx++) {
			unsigned int extw = ext_csd_bits[idx];
			unsigned int caps = ext_to_hostcaps[extw];

			/*
			 * Check to make sure the card and controller support
			 * these capabilities
			 */
			if ((mmc->card_caps & caps) != caps)
				continue;

			err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
					EXT_CSD_BUS_WIDTH, extw);

			if (err)
				continue;

			mmc->ddr_mode = (caps & MMC_MODE_DDR_52MHz) ? 1 : 0;
			mmc_set_bus_width(mmc, widths[idx]);

			err = mmc_send_ext_csd(mmc, test_csd);

			if (err)
				continue;

			/* Only compare read only fields */
			if (ext_csd[EXT_CSD_PARTITIONING_SUPPORT]
				== test_csd[EXT_CSD_PARTITIONING_SUPPORT] &&
			    ext_csd[EXT_CSD_HC_WP_GRP_SIZE]
				== test_csd[EXT_CSD_HC_WP_GRP_SIZE] &&
			    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)
				break;
			else
				err = SWITCH_ERR;
		}

		if (err)
			return err;

		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);

	/* Fix the block length for DDR mode */
	if (mmc->ddr_mode) {
		mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
		mmc->write_bl_len = MMC_MAX_BLOCK_LEN;
	}

	/* fill in device description */
	mmc->block_dev.lun = 0;
	mmc->block_dev.type = 0;
	mmc->block_dev.blksz = mmc->read_bl_len;
	mmc->block_dev.log2blksz = LOG2(mmc->block_dev.blksz);
	mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
	sprintf(mmc->block_dev.vendor, "Man %06x Snr %04x%04x",
		mmc->cid[0] >> 24, (mmc->cid[2] & 0xffff),
		(mmc->cid[3] >> 16) & 0xffff);
	sprintf(mmc->block_dev.product, "%c%c%c%c%c%c", mmc->cid[0] & 0xff,
		(mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
		(mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff,
		(mmc->cid[2] >> 24) & 0xff);
	sprintf(mmc->block_dev.revision, "%d.%d", (mmc->cid[2] >> 20) & 0xf,
		(mmc->cid[2] >> 16) & 0xf);
#else
	mmc->block_dev.vendor[0] = 0;
	mmc->block_dev.product[0] = 0;
	mmc->block_dev.revision[0] = 0;
#endif
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBDISK_SUPPORT)
	init_part(&mmc->block_dev);
#endif

	return 0;
}

static int mmc_send_if_cond(struct mmc *mmc)
{
	struct mmc_cmd cmd;
	int err;

	cmd.cmdidx = SD_CMD_SEND_IF_COND;
	/* We set the bit if the host supports voltages between 2.7 and 3.6 V */
	cmd.cmdarg = ((mmc->cfg->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;
}

/* not used any more */
int __deprecated mmc_register(struct mmc *mmc)
{
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
	printf("%s is deprecated! use mmc_create() instead.\n", __func__);
#endif
	return -1;
}

struct mmc *mmc_create(const struct mmc_config *cfg, void *priv)
{
	struct mmc *mmc;

	/* quick validation */
	if (cfg == NULL || cfg->ops == NULL || cfg->ops->send_cmd == NULL ||
			cfg->f_min == 0 || cfg->f_max == 0 || cfg->b_max == 0)
		return NULL;

	mmc = calloc(1, sizeof(*mmc));
	if (mmc == NULL)
		return NULL;

	mmc->cfg = cfg;
	mmc->priv = priv;

	/* the following chunk was mmc_register() */

	/* Setup dsr related values */
	mmc->dsr_imp = 0;
	mmc->dsr = 0xffffffff;
	/* Setup the universal parts of the block interface just once */
	mmc->block_dev.if_type = IF_TYPE_MMC;
	mmc->block_dev.dev = cur_dev_num++;
	mmc->block_dev.removable = 1;
	mmc->block_dev.block_read = mmc_bread;
	mmc->block_dev.block_write = mmc_bwrite;
	mmc->block_dev.block_erase = mmc_berase;

	/* setup initial part type */
	mmc->block_dev.part_type = mmc->cfg->part_type;

	INIT_LIST_HEAD(&mmc->link);

	list_add_tail(&mmc->link, &mmc_devices);

	return mmc;
}

void mmc_destroy(struct mmc *mmc)
{
	/* only freeing memory for now */
	free(mmc);
}

#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

/* board-specific MMC power initializations. */
__weak void board_mmc_power_init(void)
{
}

int mmc_start_init(struct mmc *mmc)
{
	int err;

	/* we pretend there's no card when init is NULL */
	if (mmc_getcd(mmc) == 0 || mmc->cfg->ops->init == NULL) {
		mmc->has_init = 0;
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
		printf("MMC: no card present\n");
#endif
		return NO_CARD_ERR;
	}

	if (mmc->has_init)
		return 0;

	board_mmc_power_init();

	/* made sure it's not NULL earlier */
	err = mmc->cfg->ops->init(mmc);

	if (err)
		return err;

	mmc->ddr_mode = 0;
	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) {
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
			printf("Card did not respond to voltage select!\n");
#endif
			return UNUSABLE_ERR;
		}
	}

	if (err == IN_PROGRESS)
		mmc->init_in_progress = 1;

	return err;
}

static int mmc_complete_init(struct mmc *mmc)
{
	int err = 0;

	if (mmc->op_cond_pending)
		err = mmc_complete_op_cond(mmc);

	if (!err)
		err = mmc_startup(mmc);
	if (err)
		mmc->has_init = 0;
	else
		mmc->has_init = 1;
	mmc->init_in_progress = 0;
	return err;
}

int mmc_init(struct mmc *mmc)
{
	int err = IN_PROGRESS;
	unsigned start;

	if (mmc->has_init)
		return 0;

	start = get_timer(0);

	if (!mmc->init_in_progress)
		err = mmc_start_init(mmc);

	if (!err || err == IN_PROGRESS)
		err = mmc_complete_init(mmc);
	debug("%s: %d, time %lu\n", __func__, err, get_timer(start));
	return err;
}

int mmc_set_dsr(struct mmc *mmc, u16 val)
{
	mmc->dsr = val;
	return 0;
}

/* CPU-specific MMC initializations */
__weak int cpu_mmc_init(bd_t *bis)
{
	return -1;
}

/* board-specific MMC initializations. */
__weak int board_mmc_init(bd_t *bis)
{
	return -1;
}

#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)

void print_mmc_devices(char separator)
{
	struct mmc *m;
	struct list_head *entry;

	list_for_each(entry, &mmc_devices) {
		m = list_entry(entry, struct mmc, link);

		printf("%s: %d", m->cfg->name, m->block_dev.dev);

		if (entry->next != &mmc_devices) {
			printf("%c", separator);
			if (separator != '\n')
				puts (" ");
		}
	}

	printf("\n");
}

#else
void print_mmc_devices(char separator) { }
#endif

int get_mmc_num(void)
{
	return cur_dev_num;
}

void mmc_set_preinit(struct mmc *mmc, int preinit)
{
	mmc->preinit = preinit;
}

static void do_preinit(void)
{
	struct mmc *m;
	struct list_head *entry;

	list_for_each(entry, &mmc_devices) {
		m = list_entry(entry, struct mmc, link);

		if (m->preinit)
			mmc_start_init(m);
	}
}


int mmc_initialize(bd_t *bis)
{
	INIT_LIST_HEAD (&mmc_devices);
	cur_dev_num = 0;

	if (board_mmc_init(bis) < 0)
		cpu_mmc_init(bis);

#ifndef CONFIG_SPL_BUILD
	print_mmc_devices(',');
#endif

	do_preinit();
	return 0;
}

#ifdef CONFIG_SUPPORT_EMMC_BOOT
/*
 * This function changes the size of boot partition and the size of rpmb
 * partition present on EMMC devices.
 *
 * Input Parameters:
 * struct *mmc: pointer for the mmc device strcuture
 * bootsize: size of boot partition
 * rpmbsize: size of rpmb partition
 *
 * Returns 0 on success.
 */

int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
				unsigned long rpmbsize)
{
	int err;
	struct mmc_cmd cmd;

	/* Only use this command for raw EMMC moviNAND. Enter backdoor mode */
	cmd.cmdidx = MMC_CMD_RES_MAN;
	cmd.resp_type = MMC_RSP_R1b;
	cmd.cmdarg = MMC_CMD62_ARG1;

	err = mmc_send_cmd(mmc, &cmd, NULL);
	if (err) {
		debug("mmc_boot_partition_size_change: Error1 = %d\n", err);
		return err;
	}

	/* Boot partition changing mode */
	cmd.cmdidx = MMC_CMD_RES_MAN;
	cmd.resp_type = MMC_RSP_R1b;
	cmd.cmdarg = MMC_CMD62_ARG2;

	err = mmc_send_cmd(mmc, &cmd, NULL);
	if (err) {
		debug("mmc_boot_partition_size_change: Error2 = %d\n", err);
		return err;
	}
	/* boot partition size is multiple of 128KB */
	bootsize = (bootsize * 1024) / 128;

	/* Arg: boot partition size */
	cmd.cmdidx = MMC_CMD_RES_MAN;
	cmd.resp_type = MMC_RSP_R1b;
	cmd.cmdarg = bootsize;

	err = mmc_send_cmd(mmc, &cmd, NULL);
	if (err) {
		debug("mmc_boot_partition_size_change: Error3 = %d\n", err);
		return err;
	}
	/* RPMB partition size is multiple of 128KB */
	rpmbsize = (rpmbsize * 1024) / 128;
	/* Arg: RPMB partition size */
	cmd.cmdidx = MMC_CMD_RES_MAN;
	cmd.resp_type = MMC_RSP_R1b;
	cmd.cmdarg = rpmbsize;

	err = mmc_send_cmd(mmc, &cmd, NULL);
	if (err) {
		debug("mmc_boot_partition_size_change: Error4 = %d\n", err);
		return err;
	}
	return 0;
}

/*
 * Modify EXT_CSD[177] which is BOOT_BUS_WIDTH
 * based on the passed in values for BOOT_BUS_WIDTH, RESET_BOOT_BUS_WIDTH
 * and BOOT_MODE.
 *
 * Returns 0 on success.
 */
int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode)
{
	int err;

	err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_BUS_WIDTH,
			 EXT_CSD_BOOT_BUS_WIDTH_MODE(mode) |
			 EXT_CSD_BOOT_BUS_WIDTH_RESET(reset) |
			 EXT_CSD_BOOT_BUS_WIDTH_WIDTH(width));

	if (err)
		return err;
	return 0;
}

/*
 * Modify EXT_CSD[179] which is PARTITION_CONFIG (formerly BOOT_CONFIG)
 * based on the passed in values for BOOT_ACK, BOOT_PARTITION_ENABLE and
 * PARTITION_ACCESS.
 *
 * Returns 0 on success.
 */
int mmc_set_part_conf(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
{
	int err;

	err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
			 EXT_CSD_BOOT_ACK(ack) |
			 EXT_CSD_BOOT_PART_NUM(part_num) |
			 EXT_CSD_PARTITION_ACCESS(access));

	if (err)
		return err;
	return 0;
}

/*
 * Modify EXT_CSD[162] which is RST_n_FUNCTION based on the given value
 * for enable.  Note that this is a write-once field for non-zero values.
 *
 * Returns 0 on success.
 */
int mmc_set_rst_n_function(struct mmc *mmc, u8 enable)
{
	return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_RST_N_FUNCTION,
			  enable);
}
#endif