mmc.c

	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);

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

	do_preinit();
	return 0;
}

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

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

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

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

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

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

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

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

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

/*
 * This function shall form and send the commands to open / close the
 * boot partition specified by user.
 *
 * Input Parameters:
 * ack: 0x0 - No boot acknowledge sent (default)
 *	0x1 - Boot acknowledge sent during boot operation
 * part_num: User selects boot data that will be sent to master
 *	0x0 - Device not boot enabled (default)
 *	0x1 - Boot partition 1 enabled for boot
 *	0x2 - Boot partition 2 enabled for boot
 * access: User selects partitions to access
 *	0x0 : No access to boot partition (default)
 *	0x1 : R/W boot partition 1
 *	0x2 : R/W boot partition 2
 *	0x3 : R/W Replay Protected Memory Block (RPMB)
 *
 * Returns 0 on success.
 */
int mmc_boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
{
	int err;
	struct mmc_cmd cmd;

	/* Boot ack enable, boot partition enable , boot partition access */
	cmd.cmdidx = MMC_CMD_SWITCH;
	cmd.resp_type = MMC_RSP_R1b;

	cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
			(EXT_CSD_PART_CONF << 16) |
			((EXT_CSD_BOOT_ACK(ack) |
			EXT_CSD_BOOT_PART_NUM(part_num) |
			EXT_CSD_PARTITION_ACCESS(access)) << 8);

	err = mmc_send_cmd(mmc, &cmd, NULL);
	if (err) {
		if (access) {
			debug("mmc boot partition#%d open fail:Error1 = %d\n",
			      part_num, err);
		} else {
			debug("mmc boot partition#%d close fail:Error = %d\n",
			      part_num, err);
		}
		return err;
	}

	if (access) {
		/* 4bit transfer mode at booting time. */
		cmd.cmdidx = MMC_CMD_SWITCH;
		cmd.resp_type = MMC_RSP_R1b;

		cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
				(EXT_CSD_BOOT_BUS_WIDTH << 16) |
				((1 << 0) << 8);

		err = mmc_send_cmd(mmc, &cmd, NULL);
		if (err) {
			debug("mmc boot partition#%d open fail:Error2 = %d\n",
			      part_num, err);
			return err;
		}
	}
	return 0;
}
#endif