Esempio n. 1
0
/*
 * Decode extended CSD.
 */
static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
{
	int err = 0, idx;
	unsigned int part_size;
	u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;

	BUG_ON(!card);

	if (!ext_csd)
		return 0;

	/* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
	card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
	if (card->csd.structure == 3) {
		if (card->ext_csd.raw_ext_csd_structure > 2) {
			pr_err("%s: unrecognised EXT_CSD structure "
				"version %d\n", mmc_hostname(card->host),
					card->ext_csd.raw_ext_csd_structure);
			err = -EINVAL;
			goto out;
		}
	}

	card->ext_csd.rev = ext_csd[EXT_CSD_REV];
	if (card->ext_csd.rev > 6) {
		printk(KERN_ERR "%s: unrecognised EXT_CSD revision %d\n",
			mmc_hostname(card->host), card->ext_csd.rev);
		err = -EINVAL;
		goto out;
	}

	card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
	card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
	card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
	card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
	if (card->ext_csd.rev >= 2) {
		card->ext_csd.sectors =
			ext_csd[EXT_CSD_SEC_CNT + 0] << 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;

		/* Cards with density > 2GiB are sector addressed */
		if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
			mmc_card_set_blockaddr(card);
	}

	card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
	mmc_select_card_type(card);

	card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
	card->ext_csd.raw_erase_timeout_mult =
		ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
	card->ext_csd.raw_hc_erase_grp_size =
		ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
	if (card->ext_csd.rev >= 3) {
		u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
		card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];

		/* EXT_CSD value is in units of 10ms, but we store in ms */
		card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];

		/* Sleep / awake timeout in 100ns units */
		if (sa_shift > 0 && sa_shift <= 0x17)
			card->ext_csd.sa_timeout =
					1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
		card->ext_csd.erase_group_def =
			ext_csd[EXT_CSD_ERASE_GROUP_DEF];
		card->ext_csd.hc_erase_timeout = 300 *
			ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
		card->ext_csd.hc_erase_size =
			ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;

		card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];

		/*
		 * There are two boot regions of equal size, defined in
		 * multiples of 128K.
		 */
		if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
			for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
				part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
				mmc_part_add(card, part_size,
					EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
					"boot%d", idx, true,
					MMC_BLK_DATA_AREA_BOOT);
			}
		}
	}

	card->ext_csd.raw_hc_erase_gap_size =
		ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
	card->ext_csd.raw_sec_trim_mult =
		ext_csd[EXT_CSD_SEC_TRIM_MULT];
	card->ext_csd.raw_sec_erase_mult =
		ext_csd[EXT_CSD_SEC_ERASE_MULT];
	card->ext_csd.raw_sec_feature_support =
		ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
	card->ext_csd.raw_trim_mult =
		ext_csd[EXT_CSD_TRIM_MULT];
	card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
	if (card->ext_csd.rev >= 4) {
		/*
		 * Enhanced area feature support -- check whether the eMMC
		 * card has the Enhanced area enabled.  If so, export enhanced
		 * area offset and size to user by adding sysfs interface.
		 */
		if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
		    (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
			hc_erase_grp_sz =
				ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
			hc_wp_grp_sz =
				ext_csd[EXT_CSD_HC_WP_GRP_SIZE];

			card->ext_csd.enhanced_area_en = 1;
			/*
			 * calculate the enhanced data area offset, in bytes
			 */
			card->ext_csd.enhanced_area_offset =
				(ext_csd[139] << 24) + (ext_csd[138] << 16) +
				(ext_csd[137] << 8) + ext_csd[136];
			if (mmc_card_blockaddr(card))
				card->ext_csd.enhanced_area_offset <<= 9;
			/*
			 * calculate the enhanced data area size, in kilobytes
			 */
			card->ext_csd.enhanced_area_size =
				(ext_csd[142] << 16) + (ext_csd[141] << 8) +
				ext_csd[140];
			card->ext_csd.enhanced_area_size *=
				(size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
			card->ext_csd.enhanced_area_size <<= 9;
		} else {
			/*
			 * If the enhanced area is not enabled, disable these
			 * device attributes.
			 */
			card->ext_csd.enhanced_area_offset = -EINVAL;
			card->ext_csd.enhanced_area_size = -EINVAL;
		}

		/*
		 * General purpose partition feature support --
		 * If ext_csd has the size of general purpose partitions,
		 * set size, part_cfg, partition name in mmc_part.
		 */
		if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
			EXT_CSD_PART_SUPPORT_PART_EN) {
			if (card->ext_csd.enhanced_area_en != 1) {
				hc_erase_grp_sz =
					ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
				hc_wp_grp_sz =
					ext_csd[EXT_CSD_HC_WP_GRP_SIZE];

				card->ext_csd.enhanced_area_en = 1;
			}

			for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
				if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
				!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
				!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
					continue;
				part_size =
				(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
					<< 16) +
				(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
					<< 8) +
				ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
				part_size *= (size_t)(hc_erase_grp_sz *
					hc_wp_grp_sz);
				mmc_part_add(card, part_size << 19,
					EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
					"gp%d", idx, false,
					MMC_BLK_DATA_AREA_GP);
			}
		}
		card->ext_csd.sec_trim_mult =
			ext_csd[EXT_CSD_SEC_TRIM_MULT];
		card->ext_csd.sec_erase_mult =
			ext_csd[EXT_CSD_SEC_ERASE_MULT];
		card->ext_csd.sec_feature_support =
			ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
		card->ext_csd.trim_timeout = 300 *
			ext_csd[EXT_CSD_TRIM_MULT];

		/*
		 * Note that the call to mmc_part_add above defaults to read
		 * only. If this default assumption is changed, the call must
		 * take into account the value of boot_locked below.
		 */
		card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
		card->ext_csd.boot_ro_lockable = true;
	}

	if (card->ext_csd.rev >= 5) {
		/* check whether the eMMC card support BKOPS */
		if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
			card->ext_csd.bkops = 1;
			card->ext_csd.bkops_en = ext_csd[EXT_CSD_BKOPS_EN];
			card->ext_csd.raw_bkops_status =
				ext_csd[EXT_CSD_BKOPS_STATUS];
			if (!card->ext_csd.bkops_en &&
				card->host->caps2 & MMC_CAP2_INIT_BKOPS) {
				err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
					EXT_CSD_BKOPS_EN, 1, 0);
				if (err)
					pr_warning("%s: Enabling BKOPS failed\n",
						mmc_hostname(card->host));
				else
					card->ext_csd.bkops_en = 1;
			}
		}

		/* check whether the eMMC card supports HPI */
		if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
			card->ext_csd.hpi = 1;
			if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
				card->ext_csd.hpi_cmd =	MMC_STOP_TRANSMISSION;
			else
				card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
			/*
			 * Indicate the maximum timeout to close
			 * a command interrupted by HPI
			 */
			card->ext_csd.out_of_int_time =
				ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
		}

		card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
		card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
	}

	card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
	if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
		card->erased_byte = 0xFF;
	else
		card->erased_byte = 0x0;

	/* eMMC v4.5 or later */
	if (card->ext_csd.rev >= 6) {
		card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;

		card->ext_csd.generic_cmd6_time = 10 *
			ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
		card->ext_csd.power_off_longtime = 10 *
			ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];

		card->ext_csd.cache_size =
			ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
			ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
			ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
			ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;

		if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
			card->ext_csd.data_sector_size = 4096;
		else
			card->ext_csd.data_sector_size = 512;

		if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
		    (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
			card->ext_csd.data_tag_unit_size =
			((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
			(card->ext_csd.data_sector_size);
		} else {
			card->ext_csd.data_tag_unit_size = 0;
		}
		card->ext_csd.max_packed_writes =
			ext_csd[EXT_CSD_MAX_PACKED_WRITES];
		card->ext_csd.max_packed_reads =
			ext_csd[EXT_CSD_MAX_PACKED_READS];
	}

	/* [LGE_CHANGE_S] [email protected]  
	 * samsung support discard option on version 4.41+ 
	 * Enable discard only for V3, also check manufacture id in case of V3 support both memory(Hynix, Samsung).
	 * DO NOT add feature for v7/u0/m4/etc without firm reason on emmc spec or vendor confirm */
#if defined (CONFIG_MACH_MSM7X25A_V3) && defined (CONFIG_MACH_FEATURE_DISCARD)
#define MANUFACTURE_ID_SAMSUNG	0x15
	if (card->cid.manfid == MANUFACTURE_ID_SAMSUNG)
	{
		card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
		pr_info("%s: !!! card->cid.manfid:%d, prod_name:%s !!! \n", 
			mmc_hostname(card->host), card->cid.manfid, card->cid.prod_name);
	}
#endif

out:
	return err;
}
Esempio n. 2
0
static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
{
	int err = 0, idx;
	unsigned int part_size;
	u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;

	BUG_ON(!card);

	if (!ext_csd)
		return 0;

	/* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
	card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
	if (card->csd.structure == 3) {
		if (card->ext_csd.raw_ext_csd_structure > 2) {
			pr_err("%s: unrecognised EXT_CSD structure "
				"version %d\n", mmc_hostname(card->host),
					card->ext_csd.raw_ext_csd_structure);
			err = -EINVAL;
			goto out;
		}
	}

	card->ext_csd.rev = ext_csd[EXT_CSD_REV];
	if (card->ext_csd.rev > 7) {
		pr_err("%s: unrecognised EXT_CSD revision %d\n",
			mmc_hostname(card->host), card->ext_csd.rev);
		err = -EINVAL;
		goto out;
	}

	card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
	card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
	card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
	card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
	if (card->ext_csd.rev >= 2) {
		card->ext_csd.sectors =
			ext_csd[EXT_CSD_SEC_CNT + 0] << 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;

		/* Cards with density > 2GiB are sector addressed */
		if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
			mmc_card_set_blockaddr(card);
	}
	card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
	switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
	case EXT_CSD_CARD_TYPE_SDR_ALL:
	case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_1_8V:
	case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_1_2V:
	case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_52:
		card->ext_csd.hs_max_dtr = 200000000;
		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_200;
		break;
	case EXT_CSD_CARD_TYPE_SDR_1_2V_ALL:
	case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_1_8V:
	case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_1_2V:
	case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_52:
		card->ext_csd.hs_max_dtr = 200000000;
		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_1_2V;
		break;
	case EXT_CSD_CARD_TYPE_SDR_1_8V_ALL:
	case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_1_8V:
	case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_1_2V:
	case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_52:
		card->ext_csd.hs_max_dtr = 200000000;
		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_1_8V;
		break;
	case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 |
	     EXT_CSD_CARD_TYPE_26:
		card->ext_csd.hs_max_dtr = 52000000;
		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_52;
		break;
	case EXT_CSD_CARD_TYPE_DDR_1_2V | EXT_CSD_CARD_TYPE_52 |
	     EXT_CSD_CARD_TYPE_26:
		card->ext_csd.hs_max_dtr = 52000000;
		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_2V;
		break;
	case EXT_CSD_CARD_TYPE_DDR_1_8V | EXT_CSD_CARD_TYPE_52 |
	     EXT_CSD_CARD_TYPE_26:
		card->ext_csd.hs_max_dtr = 52000000;
		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_DDR_1_8V;
		break;
	case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26:
		card->ext_csd.hs_max_dtr = 52000000;
		break;
	case EXT_CSD_CARD_TYPE_26:
		card->ext_csd.hs_max_dtr = 26000000;
		break;
	default:
		/* MMC v4 spec says this cannot happen */
		pr_warning("%s: card is mmc v4 but doesn't "
			"support any high-speed modes.\n",
			mmc_hostname(card->host));
	}

	card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
	card->ext_csd.raw_erase_timeout_mult =
		ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
	card->ext_csd.raw_hc_erase_grp_size =
		ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
	if (card->ext_csd.rev >= 3) {
		u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
		card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];

		/* EXT_CSD value is in units of 10ms, but we store in ms */
		card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];

		/* Sleep / awake timeout in 100ns units */
		if (sa_shift > 0 && sa_shift <= 0x17)
			card->ext_csd.sa_timeout =
					1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
		card->ext_csd.erase_group_def =
			ext_csd[EXT_CSD_ERASE_GROUP_DEF];
		card->ext_csd.hc_erase_timeout = 300 *
			ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
		card->ext_csd.hc_erase_size =
			ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;

		card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];

		/*
		 * There are two boot regions of equal size, defined in
		 * multiples of 128K.
		 */
		if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
			for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
				part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
				mmc_part_add(card, part_size,
					EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
					"boot%d", idx, true,
					MMC_BLK_DATA_AREA_BOOT);
			}
		}
	}

	card->ext_csd.raw_hc_erase_gap_size =
		ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
	card->ext_csd.raw_sec_trim_mult =
		ext_csd[EXT_CSD_SEC_TRIM_MULT];
	card->ext_csd.raw_sec_erase_mult =
		ext_csd[EXT_CSD_SEC_ERASE_MULT];
	card->ext_csd.raw_sec_feature_support =
		ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
	card->ext_csd.raw_trim_mult =
		ext_csd[EXT_CSD_TRIM_MULT];
	if (card->ext_csd.rev >= 4) {
		/*
		 * Enhanced area feature support -- check whether the eMMC
		 * card has the Enhanced area enabled.  If so, export enhanced
		 * area offset and size to user by adding sysfs interface.
		 */
		card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
		if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
		    (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
			hc_erase_grp_sz =
				ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
			hc_wp_grp_sz =
				ext_csd[EXT_CSD_HC_WP_GRP_SIZE];

			card->ext_csd.enhanced_area_en = 1;
			/*
			 * calculate the enhanced data area offset, in bytes
			 */
			card->ext_csd.enhanced_area_offset =
				(ext_csd[139] << 24) + (ext_csd[138] << 16) +
				(ext_csd[137] << 8) + ext_csd[136];
			if (mmc_card_blockaddr(card))
				card->ext_csd.enhanced_area_offset <<= 9;
			/*
			 * calculate the enhanced data area size, in kilobytes
			 */
			card->ext_csd.enhanced_area_size =
				(ext_csd[142] << 16) + (ext_csd[141] << 8) +
				ext_csd[140];
			card->ext_csd.enhanced_area_size *=
				(size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
			card->ext_csd.enhanced_area_size <<= 9;
		} else {
			/*
			 * If the enhanced area is not enabled, disable these
			 * device attributes.
			 */
			card->ext_csd.enhanced_area_offset = -EINVAL;
			card->ext_csd.enhanced_area_size = -EINVAL;
		}

		/*
		 * General purpose partition feature support --
		 * If ext_csd has the size of general purpose partitions,
		 * set size, part_cfg, partition name in mmc_part.
		 */
		if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
			EXT_CSD_PART_SUPPORT_PART_EN) {
			if (card->ext_csd.enhanced_area_en != 1) {
				hc_erase_grp_sz =
					ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
				hc_wp_grp_sz =
					ext_csd[EXT_CSD_HC_WP_GRP_SIZE];

				card->ext_csd.enhanced_area_en = 1;
			}

			for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
				if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
				!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
				!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
					continue;
				part_size =
				(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
					<< 16) +
				(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
					<< 8) +
				ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
				part_size *= (size_t)(hc_erase_grp_sz *
					hc_wp_grp_sz);
				mmc_part_add(card, part_size << 19,
					EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
					"gp%d", idx, false,
					MMC_BLK_DATA_AREA_GP);
			}
		}
		card->ext_csd.sec_trim_mult =
			ext_csd[EXT_CSD_SEC_TRIM_MULT];
		card->ext_csd.sec_erase_mult =
			ext_csd[EXT_CSD_SEC_ERASE_MULT];
		card->ext_csd.sec_feature_support =
			ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
		card->ext_csd.trim_timeout = 300 *
			ext_csd[EXT_CSD_TRIM_MULT];

		/*
		 * Note that the call to mmc_part_add above defaults to read
		 * only. If this default assumption is changed, the call must
		 * take into account the value of boot_locked below.
		 */
		card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
		card->ext_csd.boot_ro_lockable = true;
	}

	if (card->ext_csd.rev >= 5) {
		/* check whether the eMMC card supports HPI */
		if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
			card->ext_csd.hpi = 1;
			if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
				card->ext_csd.hpi_cmd =	MMC_STOP_TRANSMISSION;
			else
				card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
			/*
			 * Indicate the maximum timeout to close
			 * a command interrupted by HPI
			 */
			card->ext_csd.out_of_int_time =
				ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
		}

		card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
		card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
	}

	card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
	if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
		card->erased_byte = 0xFF;
	else
		card->erased_byte = 0x0;

        /* for samsung emmc4.41 plus spec */
        if ((card->cid.manfid == VENDOR_SAMSUNG) && 
            (card->ext_csd.rev == 5)             && 
            (1 == (0x1 & ext_csd[EXT_CSD_SAMSUNG_FEATURE]))){
            printk("set to support discard\n");
            card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
        }

	/* eMMC v4.5 or later */
	if (card->ext_csd.rev >= 6) {
		card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;

		card->ext_csd.generic_cmd6_time = 10 *
			ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
		card->ext_csd.power_off_longtime = 10 *
			ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];

		card->ext_csd.cache_size =
			ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
			ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
			ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
			ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;

		if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
			card->ext_csd.data_sector_size = 4096;
		else
			card->ext_csd.data_sector_size = 512;

		if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
		    (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
			card->ext_csd.data_tag_unit_size =
			((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
			(card->ext_csd.data_sector_size);
		} else {
			card->ext_csd.data_tag_unit_size = 0;
		}
	}

out:
	return err;
}
/*
 * Decode extended CSD.
 */
static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
{
	int err = 0, idx;
	unsigned int part_size;
	u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;

	BUG_ON(!card);

	if (!ext_csd)
		return 0;

	/* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
	card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
	if (card->csd.structure == 3) {
		if (card->ext_csd.raw_ext_csd_structure > 2) {
			pr_err("%s: unrecognised EXT_CSD structure "
				"version %d\n", mmc_hostname(card->host),
					card->ext_csd.raw_ext_csd_structure);
			err = -EINVAL;
			goto out;
		}
	}

	card->ext_csd.rev = ext_csd[EXT_CSD_REV];
	if (card->ext_csd.rev > 7) {
		pr_err("%s: unrecognised EXT_CSD revision %d\n",
			mmc_hostname(card->host), card->ext_csd.rev);
		err = -EINVAL;
		goto out;
	}

	card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
	card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
	card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
	card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
	if (card->ext_csd.rev >= 2) {
		card->ext_csd.sectors =
			ext_csd[EXT_CSD_SEC_CNT + 0] << 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;

		/* Cards with density > 2GiB are sector addressed */
		if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
			mmc_card_set_blockaddr(card);
	}

	card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
	mmc_select_card_type(card);

	card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
	card->ext_csd.raw_erase_timeout_mult =
		ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
	card->ext_csd.raw_hc_erase_grp_size =
		ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
	card->ext_csd.part_set_complete =
		ext_csd[EXT_CSD_PART_SET_COMPLETE];
	if (card->ext_csd.rev >= 3) {
		u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
		card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];

		/* EXT_CSD value is in units of 10ms, but we store in ms */
		card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];

		/* Sleep / awake timeout in 100ns units */
		if (sa_shift > 0 && sa_shift <= 0x17)
			card->ext_csd.sa_timeout =
					1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
		card->ext_csd.erase_group_def =
			ext_csd[EXT_CSD_ERASE_GROUP_DEF];
		card->ext_csd.hc_erase_timeout = 300 *
			ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
		card->ext_csd.hc_erase_size =
			ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;

		card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];

		/*
		 * There are two boot regions of equal size, defined in
		 * multiples of 128K.
		 */
		if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
			for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
				part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
				mmc_part_add(card, part_size,
					EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
					"boot%d", idx, true,
					MMC_BLK_DATA_AREA_BOOT);
			}
		}
	}

	card->ext_csd.raw_hc_erase_gap_size =
		ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
	card->ext_csd.raw_sec_trim_mult =
		ext_csd[EXT_CSD_SEC_TRIM_MULT];
	card->ext_csd.raw_sec_erase_mult =
		ext_csd[EXT_CSD_SEC_ERASE_MULT];
	card->ext_csd.raw_sec_feature_support =
		ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
	card->ext_csd.raw_trim_mult =
		ext_csd[EXT_CSD_TRIM_MULT];
	card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
	if (card->ext_csd.rev >= 4) {
		/*
		 * Enhanced area feature support -- check whether the eMMC
		 * card has the Enhanced area enabled.  If so, export enhanced
		 * area offset and size to user by adding sysfs interface.
		 */
		if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
		    (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
			hc_erase_grp_sz =
				ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
			hc_wp_grp_sz =
				ext_csd[EXT_CSD_HC_WP_GRP_SIZE];

			card->ext_csd.enhanced_area_en = 1;
			/*
			 * calculate the enhanced data area offset, in bytes
			 */
			card->ext_csd.enhanced_area_offset =
				(ext_csd[139] << 24) + (ext_csd[138] << 16) +
				(ext_csd[137] << 8) + ext_csd[136];
			if (mmc_card_blockaddr(card))
				card->ext_csd.enhanced_area_offset <<= 9;
			/*
			 * calculate the enhanced data area size, in kilobytes
			 */
			card->ext_csd.enhanced_area_size =
				(ext_csd[142] << 16) + (ext_csd[141] << 8) +
				ext_csd[140];
			card->ext_csd.enhanced_area_size *=
				(size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
			card->ext_csd.enhanced_area_size <<= 9;
		} else {
			/*
			 * If the enhanced area is not enabled, disable these
			 * device attributes.
			 */
			card->ext_csd.enhanced_area_offset = -EINVAL;
			card->ext_csd.enhanced_area_size = -EINVAL;
		}

		/*
		 * General purpose partition feature support --
		 * If ext_csd has the size of general purpose partitions,
		 * set size, part_cfg, partition name in mmc_part.
		 */
		if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
			EXT_CSD_PART_SUPPORT_PART_EN) {
			if (card->ext_csd.enhanced_area_en != 1) {
				hc_erase_grp_sz =
					ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
				hc_wp_grp_sz =
					ext_csd[EXT_CSD_HC_WP_GRP_SIZE];

				card->ext_csd.enhanced_area_en = 1;
			}

			for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
				if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
				!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
				!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
					continue;
				part_size =
				(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
					<< 16) +
				(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
					<< 8) +
				ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
				part_size *= (size_t)(hc_erase_grp_sz *
						hc_wp_grp_sz);
				card->ext_csd.gpp_sz[idx] = part_size << 10;
				mmc_part_add(card, part_size << 19,
					EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
					"gp%d", idx, false,
					MMC_BLK_DATA_AREA_GP);
			}
			card->ext_csd.wpg_sz = (size_t)(hc_erase_grp_sz *
					hc_wp_grp_sz);
		}
		card->ext_csd.sec_trim_mult =
			ext_csd[EXT_CSD_SEC_TRIM_MULT];
		card->ext_csd.sec_erase_mult =
			ext_csd[EXT_CSD_SEC_ERASE_MULT];
		card->ext_csd.sec_feature_support =
			ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
		card->ext_csd.trim_timeout = 300 *
			ext_csd[EXT_CSD_TRIM_MULT];

		/*
		 * Note that the call to mmc_part_add above defaults to read
		 * only. If this default assumption is changed, the call must
		 * take into account the value of boot_locked below.
		 */
		card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
		card->ext_csd.boot_ro_lockable = true;
	}

	if (card->ext_csd.rev >= 5) {
		/* check whether the eMMC card supports BKOPS */
		if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
			card->ext_csd.bkops = 1;
			card->ext_csd.bkops_en = ext_csd[EXT_CSD_BKOPS_EN];
			card->ext_csd.raw_bkops_status =
				ext_csd[EXT_CSD_BKOPS_STATUS];
			if (!card->ext_csd.bkops_en)
				pr_info("%s: BKOPS_EN bit is not set\n",
					mmc_hostname(card->host));
		}

		/* check whether the eMMC card supports HPI */
		if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
			card->ext_csd.hpi = 1;
			if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
				card->ext_csd.hpi_cmd =	MMC_STOP_TRANSMISSION;
			else
				card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
			/*
			 * Indicate the maximum timeout to close
			 * a command interrupted by HPI
			 */
			card->ext_csd.out_of_int_time =
				ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
		}

		card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
		card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];

		/*
		 * RPMB regions are defined in multiples of 128K.
		 */
		card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT];
		card->ext_csd.rpmb_size = 128 *
			card->ext_csd.raw_rpmb_size_mult;
		card->ext_csd.rpmb_size <<= 2; /* Unit: half sector */
		if (ext_csd[EXT_CSD_RPMB_MULT] && mmc_host_cmd23(card->host)
			&& mmc_rpmb_partition_access(card->host)) {
			mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17,
				EXT_CSD_PART_CONFIG_ACC_RPMB,
				"rpmb", 0, false,
				MMC_BLK_DATA_AREA_RPMB);
		}
	}

	card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
	if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
		card->erased_byte = 0xFF;
	else
		card->erased_byte = 0x0;

	/* eMMC v4.5 or later */
	if (card->ext_csd.rev >= 6) {
		card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;

		card->ext_csd.generic_cmd6_time = 10 *
			ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
		card->ext_csd.power_off_longtime = 10 *
			ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];

		card->ext_csd.cache_size =
			ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
			ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
			ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
			ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;

		if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
			card->ext_csd.data_sector_size = 4096;
		else
			card->ext_csd.data_sector_size = 512;

		if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
		    (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
			card->ext_csd.data_tag_unit_size =
			((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
			(card->ext_csd.data_sector_size);
		} else {
			card->ext_csd.data_tag_unit_size = 0;
		}

		card->ext_csd.max_packed_writes =
			ext_csd[EXT_CSD_MAX_PACKED_WRITES];
		card->ext_csd.max_packed_reads =
			ext_csd[EXT_CSD_MAX_PACKED_READS];
	} else {
		card->ext_csd.data_sector_size = 512;
	}

	/*
	 * If use legacy relaible write, then the blk counts must not
	 * big than the relaible write sectors
	 */
	if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
		if (card->ext_csd.rel_sectors < RPMB_AVALIABLE_SECTORS)
			card->rpmb_max_req = card->ext_csd.rel_sectors;
		else
			card->rpmb_max_req = RPMB_AVALIABLE_SECTORS;
	} else
		card->rpmb_max_req = RPMB_AVALIABLE_SECTORS;
out:
	return err;
}
Esempio n. 4
0
static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
{
	int err = 0, idx;
	unsigned int part_size;
	u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;

	BUG_ON(!card);

	if (!ext_csd)
		return 0;

	
	card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
	if (card->csd.structure == 3) {
		if (card->ext_csd.raw_ext_csd_structure > 2) {
			pr_err("%s: unrecognised EXT_CSD structure "
				"version %d\n", mmc_hostname(card->host),
					card->ext_csd.raw_ext_csd_structure);
			err = -EINVAL;
			goto out;
		}
	}

	card->ext_csd.rev = ext_csd[EXT_CSD_REV];
	if (card->ext_csd.rev > 6) {
		printk(KERN_ERR "%s: unrecognised EXT_CSD revision %d\n",
			mmc_hostname(card->host), card->ext_csd.rev);
		err = -EINVAL;
		goto out;
	}

	card->ext_csd.raw_sectors[0] = ext_csd[EXT_CSD_SEC_CNT + 0];
	card->ext_csd.raw_sectors[1] = ext_csd[EXT_CSD_SEC_CNT + 1];
	card->ext_csd.raw_sectors[2] = ext_csd[EXT_CSD_SEC_CNT + 2];
	card->ext_csd.raw_sectors[3] = ext_csd[EXT_CSD_SEC_CNT + 3];
	if (card->ext_csd.rev >= 2) {
		card->ext_csd.sectors =
			ext_csd[EXT_CSD_SEC_CNT + 0] << 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;

		
		if (card->ext_csd.sectors > (2u * 1024 * 1024 * 1024) / 512)
			mmc_card_set_blockaddr(card);
	}

	card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
	mmc_select_card_type(card);

	card->ext_csd.raw_s_a_timeout = ext_csd[EXT_CSD_S_A_TIMEOUT];
	card->ext_csd.raw_erase_timeout_mult =
		ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
	card->ext_csd.raw_hc_erase_grp_size =
		ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
	if (card->ext_csd.rev >= 3) {
		u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
		card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];

		
		card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];

		
		if (sa_shift > 0 && sa_shift <= 0x17)
			card->ext_csd.sa_timeout =
					1 << ext_csd[EXT_CSD_S_A_TIMEOUT];
		card->ext_csd.erase_group_def =
			ext_csd[EXT_CSD_ERASE_GROUP_DEF];
		card->ext_csd.hc_erase_timeout = 300 *
			ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
		card->ext_csd.hc_erase_size =
			ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;

		card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];

		if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
			for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
				part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
				mmc_part_add(card, part_size,
					EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
					"boot%d", idx, true,
					MMC_BLK_DATA_AREA_BOOT);
			}
		}
	}

	card->ext_csd.raw_hc_erase_gap_size =
		ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
	card->ext_csd.raw_sec_trim_mult =
		ext_csd[EXT_CSD_SEC_TRIM_MULT];
	card->ext_csd.raw_sec_erase_mult =
		ext_csd[EXT_CSD_SEC_ERASE_MULT];
	card->ext_csd.raw_sec_feature_support =
		ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
	card->ext_csd.raw_trim_mult =
		ext_csd[EXT_CSD_TRIM_MULT];
	if (card->ext_csd.rev >= 4) {
		card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
		if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
		    (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
			hc_erase_grp_sz =
				ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
			hc_wp_grp_sz =
				ext_csd[EXT_CSD_HC_WP_GRP_SIZE];

			card->ext_csd.enhanced_area_en = 1;
			card->ext_csd.enhanced_area_offset =
				(ext_csd[139] << 24) + (ext_csd[138] << 16) +
				(ext_csd[137] << 8) + ext_csd[136];
			if (mmc_card_blockaddr(card))
				card->ext_csd.enhanced_area_offset <<= 9;
			card->ext_csd.enhanced_area_size =
				(ext_csd[142] << 16) + (ext_csd[141] << 8) +
				ext_csd[140];
			card->ext_csd.enhanced_area_size *=
				(size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
			card->ext_csd.enhanced_area_size <<= 9;
		} else {
			card->ext_csd.enhanced_area_offset = -EINVAL;
			card->ext_csd.enhanced_area_size = -EINVAL;
		}

		if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
			EXT_CSD_PART_SUPPORT_PART_EN) {
			if (card->ext_csd.enhanced_area_en != 1) {
				hc_erase_grp_sz =
					ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
				hc_wp_grp_sz =
					ext_csd[EXT_CSD_HC_WP_GRP_SIZE];

				card->ext_csd.enhanced_area_en = 1;
			}

			for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
				if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
				!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
				!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
					continue;
				part_size =
				(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
					<< 16) +
				(ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
					<< 8) +
				ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
				part_size *= (size_t)(hc_erase_grp_sz *
					hc_wp_grp_sz);
				mmc_part_add(card, part_size << 19,
					EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
					"gp%d", idx, false,
					MMC_BLK_DATA_AREA_GP);
			}
		}
		card->ext_csd.sec_trim_mult =
			ext_csd[EXT_CSD_SEC_TRIM_MULT];
		card->ext_csd.sec_erase_mult =
			ext_csd[EXT_CSD_SEC_ERASE_MULT];
		card->ext_csd.sec_feature_support =
			ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
		card->ext_csd.trim_timeout = 300 *
			ext_csd[EXT_CSD_TRIM_MULT];

		card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
		card->ext_csd.boot_ro_lockable = true;
	}

	if (card->ext_csd.rev >= 5) {
		
		if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
			card->ext_csd.bkops = 1;
			card->ext_csd.bkops_en = ext_csd[EXT_CSD_BKOPS_EN];
			pr_info("[HTC_KER_ADD]%s: ext_csd[EXT_CSD_BKOPS_EN] = %d\n",
			mmc_hostname(card->host),
			ext_csd[EXT_CSD_BKOPS_EN]);
			card->ext_csd.raw_bkops_status =
				ext_csd[EXT_CSD_BKOPS_STATUS];
			if (!card->ext_csd.bkops_en &&
				card->host->caps2 & MMC_CAP2_INIT_BKOPS) {
				err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
					EXT_CSD_BKOPS_EN, 1, 0);
				if (err)
					pr_warning("%s: Enabling BKOPS failed\n",
						mmc_hostname(card->host));
				else {
					card->ext_csd.bkops_en = 1;
					pr_info("[HTC_KER_ADD]%s: Enabled BKOPs\n",
					mmc_hostname(card->host));
				}
			}
		}

		
		if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
			card->ext_csd.hpi = 1;
			if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
				card->ext_csd.hpi_cmd =	MMC_STOP_TRANSMISSION;
			else
				card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
			card->ext_csd.out_of_int_time =
				ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
		}

		card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
		card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
	}

	card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
	if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
		card->erased_byte = 0xFF;
	else
		card->erased_byte = 0x0;

	
	if (card->ext_csd.rev >= 6) {
		card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;

		card->ext_csd.generic_cmd6_time = 10 *
			ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
		card->ext_csd.power_off_longtime = 10 *
			ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];

		card->ext_csd.cache_size =
			ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
			ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
			ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
			ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;

		if (ext_csd[EXT_CSD_DATA_SECTOR_SIZE] == 1)
			card->ext_csd.data_sector_size = 4096;
		else
			card->ext_csd.data_sector_size = 512;

		if ((ext_csd[EXT_CSD_DATA_TAG_SUPPORT] & 1) &&
		    (ext_csd[EXT_CSD_TAG_UNIT_SIZE] <= 8)) {
			card->ext_csd.data_tag_unit_size =
			((unsigned int) 1 << ext_csd[EXT_CSD_TAG_UNIT_SIZE]) *
			(card->ext_csd.data_sector_size);
		} else {
			card->ext_csd.data_tag_unit_size = 0;
		}
		card->ext_csd.max_packed_writes =
			ext_csd[EXT_CSD_MAX_PACKED_WRITES];
		card->ext_csd.max_packed_reads =
			ext_csd[EXT_CSD_MAX_PACKED_READS];
	}

	if (card->cid.manfid == SANDISK_MMC) {
		char buf[7] = {0};
		sprintf(buf, "%c%c%c%c%c%c", ext_csd[73], ext_csd[74], ext_csd[75],
										ext_csd[76], ext_csd[77], ext_csd[78]);
		strncpy(card->ext_csd.fwrev, buf, strlen(buf));
	}

	if (mmc_card_mmc(card)) {
		char *buf;
		int i, j;
		ssize_t n = 0;
		pr_info("%s: cid %08x%08x%08x%08x\n",
			mmc_hostname(card->host),
			card->raw_cid[0], card->raw_cid[1],
			card->raw_cid[2], card->raw_cid[3]);
		pr_info("%s: csd %08x%08x%08x%08x\n",
			mmc_hostname(card->host),
			card->raw_csd[0], card->raw_csd[1],
			card->raw_csd[2], card->raw_csd[3]);

		buf = kmalloc(512, GFP_KERNEL);
		if (buf) {
			for (i = 0; i < 32; i++) {
				for (j = 511 - (16 * i); j >= 496 - (16 * i); j--)
					n += sprintf(buf + n, "%02x", ext_csd[j]);
				n += sprintf(buf + n, "\n");
				pr_info("%s: ext_csd %s", mmc_hostname(card->host), buf);
				n = 0;
			}
		}
		if (buf)
			kfree(buf);
	}

out:
	return err;
}