mmc: core: Disable HPI for certain Hynix eMMC cards

Certain Hynix eMMC 4.41 cards might get broken when HPI feature is used
and hence this patch disables the HPI feature for such buggy cards.

As some of the other features like BKOPs/Cache/Sanitize are dependent on
HPI feature, those features would also get disabled if HPI is disabled.

Signed-off-by: Pratibhasagar V <pratibha@codeaurora.org>
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
[gdavis: Forward port and cleanup]
Signed-off-by: George G. Davis <george_davis@mentor.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/card/block.c

@@ -2499,12 +2499,6 @@ static int mmc_add_disk(struct mmc_blk_data *md)
 	return ret;
 }
 
-#define CID_MANFID_SANDISK	0x2
-#define CID_MANFID_TOSHIBA	0x11
-#define CID_MANFID_MICRON	0x13
-#define CID_MANFID_SAMSUNG	0x15
-#define CID_MANFID_KINGSTON	0x70
-
 static const struct mmc_fixup blk_fixups[] =
 {
 	MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,

drivers/mmc/core/mmc.c

@@ -45,6 +45,17 @@ static const unsigned int tacc_mant[] = {
 	35,	40,	45,	50,	55,	60,	70,	80,
 };
 
+static const struct mmc_fixup mmc_ext_csd_fixups[] = {
+	/*
+	 * Certain Hynix eMMC 4.41 cards might get broken when HPI feature
+	 * is used so disable the HPI feature for such buggy cards.
+	 */
+	MMC_FIXUP_EXT_CSD_REV(CID_NAME_ANY, CID_MANFID_HYNIX,
+			      0x014a, add_quirk, MMC_QUIRK_BROKEN_HPI, 5),
+
+	END_FIXUP
+};
+
 #define UNSTUFF_BITS(resp,start,size)					\
 	({								\
 		const int __size = size;				\
@@ -375,6 +386,9 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
 	 */
 	card->ext_csd.rev = ext_csd[EXT_CSD_REV];
 
+	/* fixup device after ext_csd revision field is updated */
+	mmc_fixup_device(card, mmc_ext_csd_fixups);
+
 	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];
@@ -506,7 +520,8 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
 			card->cid.year += 16;
 
 		/* check whether the eMMC card supports BKOPS */
-		if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
+		if (!mmc_card_broken_hpi(card) &&
+		    ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
 			card->ext_csd.bkops = 1;
 			card->ext_csd.man_bkops_en =
 					(ext_csd[EXT_CSD_BKOPS_EN] &
@@ -519,7 +534,8 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
 		}
 
 		/* check whether the eMMC card supports HPI */
-		if (!broken_hpi && (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1)) {
+		if (!mmc_card_broken_hpi(card) &&
+		    !broken_hpi && (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;
@@ -1675,7 +1691,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	 * If cache size is higher than 0, this indicates
 	 * the existence of cache and it can be turned on.
 	 */
-	if (card->ext_csd.cache_size > 0) {
+	if (!mmc_card_broken_hpi(card) &&
+	    card->ext_csd.cache_size > 0) {
 		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 				EXT_CSD_CACHE_CTRL, 1,
 				card->ext_csd.generic_cmd6_time);

drivers/mmc/core/quirks.c

@@ -72,6 +72,8 @@ void mmc_fixup_device(struct mmc_card *card, const struct mmc_fixup *table)
 		     f->cis_vendor == (u16) SDIO_ANY_ID) &&
 		    (f->cis_device == card->cis.device ||
 		     f->cis_device == (u16) SDIO_ANY_ID) &&
+		    (f->ext_csd_rev == EXT_CSD_REV_ANY ||
+		     f->ext_csd_rev == card->ext_csd.rev) &&
 		    rev >= f->rev_start && rev <= f->rev_end) {
 			dev_dbg(&card->dev, "calling %pf\n", f->vendor_fixup);
 			f->vendor_fixup(card, f->data);

include/linux/mmc/card.h

@@ -280,6 +280,7 @@ struct mmc_card {
 #define MMC_QUIRK_SEC_ERASE_TRIM_BROKEN (1<<10)	/* Skip secure for erase/trim */
 #define MMC_QUIRK_BROKEN_IRQ_POLLING	(1<<11)	/* Polling SDIO_CCCR_INTx could create a fake interrupt */
 #define MMC_QUIRK_TRIM_BROKEN	(1<<12)		/* Skip trim */
+#define MMC_QUIRK_BROKEN_HPI	(1<<13)		/* Disable broken HPI support */
 
 
 	unsigned int		erase_size;	/* erase size in sectors */
@@ -354,6 +355,9 @@ struct mmc_fixup {
 	/* SDIO-specfic fields. You can use SDIO_ANY_ID here of course */
 	u16 cis_vendor, cis_device;
 
+	/* for MMC cards */
+	unsigned int ext_csd_rev;
+
 	void (*vendor_fixup)(struct mmc_card *card, int data);
 	int data;
 };
@@ -362,11 +366,20 @@ struct mmc_fixup {
 #define CID_OEMID_ANY ((unsigned short) -1)
 #define CID_NAME_ANY (NULL)
 
+#define EXT_CSD_REV_ANY (-1u)
+
+#define CID_MANFID_SANDISK      0x2
+#define CID_MANFID_TOSHIBA      0x11
+#define CID_MANFID_MICRON       0x13
+#define CID_MANFID_SAMSUNG      0x15
+#define CID_MANFID_KINGSTON     0x70
+#define CID_MANFID_HYNIX	0x90
+
 #define END_FIXUP { NULL }
 
 #define _FIXUP_EXT(_name, _manfid, _oemid, _rev_start, _rev_end,	\
 		   _cis_vendor, _cis_device,				\
-		   _fixup, _data)					\
+		   _fixup, _data, _ext_csd_rev)				\
 	{						   \
 		.name = (_name),			   \
 		.manfid = (_manfid),			   \
@@ -377,23 +390,30 @@ struct mmc_fixup {
 		.cis_device = (_cis_device),		   \
 		.vendor_fixup = (_fixup),		   \
 		.data = (_data),			   \
+		.ext_csd_rev = (_ext_csd_rev),		   \
 	 }
 
 #define MMC_FIXUP_REV(_name, _manfid, _oemid, _rev_start, _rev_end,	\
-		      _fixup, _data)					\
+		      _fixup, _data, _ext_csd_rev)			\
 	_FIXUP_EXT(_name, _manfid,					\
 		   _oemid, _rev_start, _rev_end,			\
 		   SDIO_ANY_ID, SDIO_ANY_ID,				\
-		   _fixup, _data)					\
+		   _fixup, _data, _ext_csd_rev)				\
 
 #define MMC_FIXUP(_name, _manfid, _oemid, _fixup, _data) \
-	MMC_FIXUP_REV(_name, _manfid, _oemid, 0, -1ull, _fixup, _data)
+	MMC_FIXUP_REV(_name, _manfid, _oemid, 0, -1ull, _fixup, _data,	\
+		      EXT_CSD_REV_ANY)
+
+#define MMC_FIXUP_EXT_CSD_REV(_name, _manfid, _oemid, _fixup, _data,	\
+			      _ext_csd_rev)				\
+	MMC_FIXUP_REV(_name, _manfid, _oemid, 0, -1ull, _fixup, _data,	\
+		      _ext_csd_rev)
 
 #define SDIO_FIXUP(_vendor, _device, _fixup, _data)			\
 	_FIXUP_EXT(CID_NAME_ANY, CID_MANFID_ANY,			\
 		    CID_OEMID_ANY, 0, -1ull,				\
 		   _vendor, _device,					\
-		   _fixup, _data)					\
+		   _fixup, _data, EXT_CSD_REV_ANY)			\
 
 #define cid_rev(hwrev, fwrev, year, month)	\
 	(((u64) hwrev) << 40 |                  \
@@ -512,6 +532,11 @@ static inline int mmc_card_broken_irq_polling(const struct mmc_card *c)
 	return c->quirks & MMC_QUIRK_BROKEN_IRQ_POLLING;
 }
 
+static inline int mmc_card_broken_hpi(const struct mmc_card *c)
+{
+	return c->quirks & MMC_QUIRK_BROKEN_HPI;
+}
+
 #define mmc_card_name(c)	((c)->cid.prod_name)
 #define mmc_card_id(c)		(dev_name(&(c)->dev))