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mmc: add support for HS400 mode of eMMC5.0

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This patch adds HS400 mode support for eMMC5.0 device.  HS400 mode is high
speed DDR interface timing from HS200.  Clock frequency is up to 200MHz
and only 8-bit bus width is supported. In addition, tuning process of
HS200 is required to synchronize the command response on the CMD line
because CMD input timing for HS400 mode is the same as HS200 mode.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Reviewed-by: Jackey Shen <jackey.shen@amd.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>
This commit is contained in:
Seungwon Jeon 2014-04-23 17:14:58 +09:00 • committed by Chris Ball
parent 577fb13199
commit 0a5b6438ee
6 changed files with 118 additions and 6 deletions
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7
include/linux/mmc/mmc.h
View file

@ -325,6 +325,7 @@ struct _mmc_csd {
#define EXT_CSD_POWER_OFF_LONG_TIME 247 /* RO */
#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_TAG_UNIT_SIZE 498 /* RO */
#define EXT_CSD_DATA_TAG_SUPPORT 499 /* RO */
#define EXT_CSD_MAX_PACKED_WRITES 500 /* RO */
@ -354,7 +355,6 @@ struct _mmc_csd {
#define EXT_CSD_CMD_SET_SECURE (1<<1)
#define EXT_CSD_CMD_SET_CPSECURE (1<<2)
#define EXT_CSD_CARD_TYPE_MASK 0x3F /* Mask out reserved bits */
#define EXT_CSD_CARD_TYPE_HS_26 (1<<0) /* Card can run at 26MHz */
#define EXT_CSD_CARD_TYPE_HS_52 (1<<1) /* Card can run at 52MHz */
#define EXT_CSD_CARD_TYPE_HS (EXT_CSD_CARD_TYPE_HS_26 | \
@ -370,6 +370,10 @@ struct _mmc_csd {
/* SDR mode @1.2V I/O */
#define EXT_CSD_CARD_TYPE_HS200 (EXT_CSD_CARD_TYPE_HS200_1_8V | \
EXT_CSD_CARD_TYPE_HS200_1_2V)
#define EXT_CSD_CARD_TYPE_HS400_1_8V (1<<6) /* Card can run at 200MHz DDR, 1.8V */
#define EXT_CSD_CARD_TYPE_HS400_1_2V (1<<7) /* Card can run at 200MHz DDR, 1.2V */
#define EXT_CSD_CARD_TYPE_HS400 (EXT_CSD_CARD_TYPE_HS400_1_8V | \
EXT_CSD_CARD_TYPE_HS400_1_2V)
#define EXT_CSD_BUS_WIDTH_1 0 /* Card is in 1 bit mode */
#define EXT_CSD_BUS_WIDTH_4 1 /* Card is in 4 bit mode */
@ -380,6 +384,7 @@ struct _mmc_csd {
#define EXT_CSD_TIMING_BC 0 /* Backwards compatility */
#define EXT_CSD_TIMING_HS 1 /* High speed */
#define EXT_CSD_TIMING_HS200 2 /* HS200 */
#define EXT_CSD_TIMING_HS400 3 /* HS400 */
#define EXT_CSD_SEC_ER_EN BIT(0)
#define EXT_CSD_SEC_BD_BLK_EN BIT(2)