Commit 0f762426 authored by Gwendal Grignou's avatar Gwendal Grignou Committed by Ulf Hansson
Browse files

mmc: core: Report firmware version for eMMC 5.0 devices. 



For eMMC 5.0 compliant device, firmware version is stored in ext_csd.
Report firmware as a 64bit hexa decimal. Vendor can use hexa or ascii
string to report firmware version.
Also add FFU related EXT_CSD register and note if the device is FFU capable.

Signed-off-by: default avatarGwendal Grignou <gwendal@chromium.org>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent e7791079

drivers/mmc/core/mmc.c

+26 −1
Original line number Diff line number Diff line
@@ -628,6 +628,14 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) 
		card->ext_csd.data_sector_size = 512;

	}



	/* eMMC v5 or later */

	if (card->ext_csd.rev >= 7) {

		memcpy(card->ext_csd.fwrev, &ext_csd[EXT_CSD_FIRMWARE_VERSION],

		       MMC_FIRMWARE_LEN);

		card->ext_csd.ffu_capable =

			(ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) &&

			!(ext_csd[EXT_CSD_FW_CONFIG] & 0x1);

	}

out:

	return err;

}
@@ -722,7 +730,7 @@ MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], 
MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);

MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9);

MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9);

MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);

MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable);

MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);

MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);

MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
@@ -735,6 +743,22 @@ MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); 
MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);

MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);



static ssize_t mmc_fwrev_show(struct device *dev,

			      struct device_attribute *attr,

			      char *buf)

{

	struct mmc_card *card = mmc_dev_to_card(dev);



	if (card->ext_csd.rev < 7) {

		return sprintf(buf, "0x%x\n", card->cid.fwrev);

	} else {

		return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,

			       card->ext_csd.fwrev);

	}

}



static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);



static struct attribute *mmc_std_attrs[] = {

	&dev_attr_cid.attr,

	&dev_attr_csd.attr,
@@ -742,6 +766,7 @@ static struct attribute *mmc_std_attrs[] = { 
	&dev_attr_erase_size.attr,

	&dev_attr_preferred_erase_size.attr,

	&dev_attr_fwrev.attr,

	&dev_attr_ffu_capable.attr,

	&dev_attr_hwrev.attr,

	&dev_attr_manfid.attr,

	&dev_attr_name.attr,

include/linux/mmc/card.h

+3 −0
Original line number Diff line number Diff line
@@ -88,6 +88,9 @@ struct mmc_ext_csd { 
	unsigned int            data_tag_unit_size;     /* DATA TAG UNIT size */

	unsigned int		boot_ro_lock;		/* ro lock support */

	bool			boot_ro_lockable;

	bool			ffu_capable;	/* Firmware upgrade support */

#define MMC_FIRMWARE_LEN 8

	u8			fwrev[MMC_FIRMWARE_LEN];  /* FW version */

	u8			raw_exception_status;	/* 54 */

	u8			raw_partition_support;	/* 160 */

	u8			raw_rpmb_size_mult;	/* 168 */

include/linux/mmc/mmc.h

+3 −0
Original line number Diff line number Diff line
@@ -296,6 +296,7 @@ struct _mmc_csd { 
#define EXT_CSD_SANITIZE_START		165     /* W */

#define EXT_CSD_WR_REL_PARAM		166	/* RO */

#define EXT_CSD_RPMB_MULT		168	/* RO */

#define EXT_CSD_FW_CONFIG		169	/* R/W */

#define EXT_CSD_BOOT_WP			173	/* R/W */

#define EXT_CSD_ERASE_GROUP_DEF		175	/* R/W */

#define EXT_CSD_PART_CONFIG		179	/* R/W */
@@ -332,6 +333,8 @@ 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_FIRMWARE_VERSION	254	/* RO, 8 bytes */

#define EXT_CSD_SUPPORTED_MODE		493	/* RO */

#define EXT_CSD_TAG_UNIT_SIZE		498	/* RO */

#define EXT_CSD_DATA_TAG_SUPPORT	499	/* RO */

#define EXT_CSD_MAX_PACKED_WRITES	500	/* RO */

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