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Commit b4493eea authored by Grégory Soutadé's avatar Grégory Soutadé Committed by Ulf Hansson
Browse files

mmc: Move code that manages user area and gp partitions into functions 



Move code that manages user area and general purpose
 partitions into functions.

Signed-off-by: default avatarGrégory Soutadé <gsoutade@neotion.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 87d2163d

drivers/mmc/core/mmc.c

+89 −73
Original line number Diff line number Diff line
@@ -299,6 +299,93 @@ static void mmc_select_card_type(struct mmc_card *card) 
	card->mmc_avail_type = avail_type;

}



static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)

{

	u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;



	/*

	 * 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;

	}

}



static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)

{

	unsigned int part_size;

	u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;

	int idx;



	/*

	 * 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);

		}

	}

}



/*

 * Decode extended CSD.

 */
@@ -306,7 +393,6 @@ 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);
@@ -403,80 +489,10 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) 
		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];

		mmc_manage_enhanced_area(card, ext_csd);



				card->ext_csd.enhanced_area_en = 1;

			}

		mmc_manage_gp_partitions(card, ext_csd);



			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 =