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Commit 6c4fa132 authored by Asutosh Das's avatar Asutosh Das Committed by Gerrit - the friendly Code Review server
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mmc: card: read the firmware version from ext_csd 



Read the firmware version from ext_csd register and print it
for debugging purpose.

Change-Id: I4c1fefd5bff753915c9858fb35c958335986c778
Signed-off-by: default avatarAsutosh Das <asutoshd@codeaurora.org>
Signed-off-by: default avatarSahitya Tummala <stummala@codeaurora.org>
parent ea0c0d74

drivers/mmc/core/mmc.c

+4 −0
Original line number Diff line number Diff line
@@ -670,6 +670,10 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) 
		 */

		card->ext_csd.strobe_support = ext_csd[EXT_CSD_STROBE_SUPPORT];

		card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT];

		card->ext_csd.fw_version = ext_csd[EXT_CSD_FW_VERSION];

		pr_info("%s: eMMC FW version: 0x%02x\n",

			mmc_hostname(card->host),

			card->ext_csd.fw_version);

		if (card->ext_csd.cmdq_support) {

			/*

			 * Queue Depth = N + 1,

include/linux/mmc/card.h

+1 −0
Original line number Diff line number Diff line
@@ -128,6 +128,7 @@ struct mmc_ext_csd { 
	u8			barrier_support;	/* 486 */

	u8			barrier_en;



	u8			fw_version;		/* 254 */

	unsigned int            feature_support;

#define MMC_DISCARD_FEATURE	BIT(0)                  /* CMD38 feature */

};

include/linux/mmc/mmc.h

+1 −0
Original line number Diff line number Diff line
@@ -283,6 +283,7 @@ struct _mmc_csd { 
#define EXT_CSD_GENERIC_CMD6_TIME	248	/* RO */

#define EXT_CSD_CACHE_SIZE		249	/* RO, 4 bytes */

#define EXT_CSD_PWR_CL_DDR_200_360	253	/* RO */

#define EXT_CSD_FW_VERSION		254	/* RO */

#define EXT_CSD_CMDQ_DEPTH		307	/* RO */

#define EXT_CSD_CMDQ_SUPPORT		308	/* RO */

#define EXT_CSD_BARRIER_SUPPORT		486	/* RO */