diff options
| author | Pavan Kunapuli <pkunapuli@nvidia.com> | 2010-12-20 15:48:45 +0530 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2011-04-26 15:48:42 -0700 |
| commit | fd4a3d3c3e8c745e448257601e06c999dd02d6e7 (patch) | |
| tree | a9491e51ae65fa5afc26af19c696778e0a1d7a03 /include/linux | |
| parent | 7c5e1d658e6ddae99ad8d1af971cc4477a3dd314 (diff) | |
mmc:Add ddr mode support for eMMC v4.4
Adding ddr mode support for eMMC v4.4 cards.
If the card and host controller support ddr mode,
configuring it. Setting clock divisor as 1 in case
ddr mode is configured.
Original-Change-Id: I94c7f2c4d23e856a67ccf312672e5f1eaee04a91
Reviewed-on: http://git-master/r/13798
Tested-by: Pavan Kunapuli <pkunapuli@nvidia.com>
Reviewed-by: Scott Williams <scwilliams@nvidia.com>
Change-Id: I79cd2f6a5ca1e8e00e4bceed5fdf61b4543aa1e4
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mmc/card.h | 2 | ||||
| -rw-r--r-- | include/linux/mmc/host.h | 6 | ||||
| -rw-r--r-- | include/linux/mmc/mmc.h | 5 |
3 files changed, 12 insertions, 1 deletions
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 13fe335fe653..832e494296c3 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -54,6 +54,7 @@ struct mmc_ext_csd { unsigned int sec_trim_mult; /* Secure trim multiplier */ unsigned int sec_erase_mult; /* Secure erase multiplier */ unsigned int trim_timeout; /* In milliseconds */ + unsigned int card_type; }; struct sd_scr { @@ -122,6 +123,7 @@ struct mmc_card { /* (missing CIA registers) */ #define MMC_QUIRK_INAND_CMD38 (1<<3) /* iNAND devices have broken CMD38 */ + unsigned char bus_speed; /* bus speed mode */ unsigned int erase_size; /* erase size in sectors */ unsigned int erase_shift; /* if erase unit is power 2 */ unsigned int pref_erase; /* in sectors */ diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 8187e32d917d..29ddcb71c635 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -50,6 +50,11 @@ struct mmc_ios { #define MMC_TIMING_LEGACY 0 #define MMC_TIMING_MMC_HS 1 #define MMC_TIMING_SD_HS 2 + + unsigned char bus_speed_mode; /* bus speed mode */ + +#define MMC_BUS_SPEED_MODE_DDR50 4 + }; struct mmc_host_ops { @@ -158,6 +163,7 @@ struct mmc_host { #define MMC_CAP_WAIT_WHILE_BUSY (1 << 9) /* Waits while card is busy */ #define MMC_CAP_ERASE (1 << 10) /* Allow erase/trim commands */ #define MMC_CAP_FORCE_HS (1 << 11) /* Must enable highspeed mode */ +#define MMC_CAP_DDR50 (1 << 12) /* Can support DDR mode at 50 MHz */ mmc_pm_flag_t pm_caps; /* supported pm features */ diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h index 5b35987e691b..feaff8f1bcce 100644 --- a/include/linux/mmc/mmc.h +++ b/include/linux/mmc/mmc.h @@ -278,11 +278,14 @@ struct _mmc_csd { #define EXT_CSD_CARD_TYPE_26 (1<<0) /* Card can run at 26MHz */ #define EXT_CSD_CARD_TYPE_52 (1<<1) /* Card can run at 52MHz */ -#define EXT_CSD_CARD_TYPE_MASK 0x3 /* Mask out reserved and DDR bits */ +#define EXT_CSD_CARD_TYPE_DDR_50 (1<<2) /* Card can run at 50MHz in DDR mode*/ +#define EXT_CSD_CARD_TYPE_MASK 0x7 /* Mask out reserved and DDR bits */ #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 */ #define EXT_CSD_BUS_WIDTH_8 2 /* Card is in 8 bit mode */ +#define EXT_CSD_DDR_BUS_WIDTH_4 5 /* Card is in ddr 4 bit mode */ +#define EXT_CSD_DDR_BUS_WIDTH_8 6 /* Card is in ddr 8 bit mode */ #define EXT_CSD_SEC_ER_EN BIT(0) #define EXT_CSD_SEC_BD_BLK_EN BIT(2) |