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Commit 6a7a6b45 authored by Andrei Warkentin's avatar Andrei Warkentin Committed by Chris Ball
Browse files

mmc: quirks: Fix erase/trim for certain SanDisk cards. 



CMD38 argument is passed through EXT_CSD[113].

Signed-off-by: default avatarAndrei Warkentin <andreiw@motorola.com>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent f6a03cbf

drivers/mmc/card/block.c

+42 −1
Original line number Diff line number Diff line
@@ -48,6 +48,13 @@ MODULE_ALIAS("mmc:block"); 
#endif

#define MODULE_PARAM_PREFIX "mmcblk."



#define INAND_CMD38_ARG_EXT_CSD  113

#define INAND_CMD38_ARG_ERASE    0x00

#define INAND_CMD38_ARG_TRIM     0x01

#define INAND_CMD38_ARG_SECERASE 0x80

#define INAND_CMD38_ARG_SECTRIM1 0x81

#define INAND_CMD38_ARG_SECTRIM2 0x88



#define REL_WRITES_SUPPORTED(card) (mmc_card_mmc((card)) &&	\

    (((card)->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||	\

     ((card)->ext_csd.rel_sectors)))
@@ -356,6 +363,16 @@ static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) 
	else

		arg = MMC_ERASE_ARG;



	if (card->quirks & MMC_QUIRK_INAND_CMD38) {

		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,

				 INAND_CMD38_ARG_EXT_CSD,

				 arg == MMC_TRIM_ARG ?

				 INAND_CMD38_ARG_TRIM :

				 INAND_CMD38_ARG_ERASE,

				 0);

		if (err)

			goto out;

	}

	err = mmc_erase(card, from, nr, arg);

out:

	spin_lock_irq(&md->lock);
@@ -386,9 +403,28 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, 
	else

		arg = MMC_SECURE_ERASE_ARG;



	if (card->quirks & MMC_QUIRK_INAND_CMD38) {

		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,

				 INAND_CMD38_ARG_EXT_CSD,

				 arg == MMC_SECURE_TRIM1_ARG ?

				 INAND_CMD38_ARG_SECTRIM1 :

				 INAND_CMD38_ARG_SECERASE,

				 0);

		if (err)

			goto out;

	}

	err = mmc_erase(card, from, nr, arg);

	if (!err && arg == MMC_SECURE_TRIM1_ARG)

	if (!err && arg == MMC_SECURE_TRIM1_ARG) {

		if (card->quirks & MMC_QUIRK_INAND_CMD38) {

			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,

					 INAND_CMD38_ARG_EXT_CSD,

					 INAND_CMD38_ARG_SECTRIM2,

					 0);

			if (err)

				goto out;

		}

		err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);

	}

out:

	spin_lock_irq(&md->lock);

	__blk_end_request(req, err, blk_rq_bytes(req));
@@ -941,6 +977,11 @@ static int mmc_add_disk(struct mmc_blk_data *md) 


static const struct mmc_fixup blk_fixups[] =

{

	MMC_FIXUP("SEM02G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),

	MMC_FIXUP("SEM04G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),

	MMC_FIXUP("SEM08G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),

	MMC_FIXUP("SEM16G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),

	MMC_FIXUP("SEM32G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),

	END_FIXUP

};

include/linux/mmc/card.h

+1 −0
Original line number Diff line number Diff line
@@ -133,6 +133,7 @@ struct mmc_card { 
#define MMC_QUIRK_BROKEN_CLK_GATING (1<<3)	/* clock gating the sdio bus will make card fail */

#define MMC_QUIRK_NONSTD_FUNC_IF (1<<4)		/* SDIO card has nonstd function interfaces */

#define MMC_QUIRK_DISABLE_CD	(1<<5)		/* disconnect CD/DAT[3] resistor */

#define MMC_QUIRK_INAND_CMD38	(1<<6)		/* iNAND devices have broken CMD38 */



	unsigned int		erase_size;	/* erase size in sectors */

 	unsigned int		erase_shift;	/* if erase unit is power 2 */