diff options
| author | Pierre Ossman <drzeus@drzeus.cx> | 2006-11-08 23:03:10 +0100 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2006-12-01 18:53:37 +0100 |
| commit | 7ccd266e676a3f0c6f8f897f58b684cac3dd1650 (patch) | |
| tree | aba8632fc523c5c663a56876ce67c580ce8d38eb /include/linux/mmc/card.h | |
| parent | 73778120c4088a0a7b59c4c378904f7a230b4820 (diff) | |
mmc: Support for high speed SD cards
Modern SD cards support a clock speed of 50 MHz. Make sure we test for
this capability and do the song and dance required to activate it.
Activating high speed support actually modifies the TRAN_SPEED field
of the CSD. But as the spec says that the cards must report 50 MHz,
we might as well skip re-reading the CSD.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'include/linux/mmc/card.h')
| -rw-r--r-- | include/linux/mmc/card.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index ce25256f80d5..d0e6a5497614 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -50,6 +50,10 @@ struct sd_scr { #define SD_SCR_BUS_WIDTH_4 (1<<2) }; +struct sd_switch_caps { + unsigned int hs_max_dtr; +}; + struct mmc_host; /* @@ -66,7 +70,7 @@ struct mmc_card { #define MMC_STATE_BAD (1<<2) /* unrecognised device */ #define MMC_STATE_SDCARD (1<<3) /* is an SD card */ #define MMC_STATE_READONLY (1<<4) /* card is read-only */ -#define MMC_STATE_HIGHSPEED (1<<5) /* card is in mmc4 highspeed mode */ +#define MMC_STATE_HIGHSPEED (1<<5) /* card is in high speed mode */ u32 raw_cid[4]; /* raw card CID */ u32 raw_csd[4]; /* raw card CSD */ u32 raw_scr[2]; /* raw card SCR */ @@ -74,6 +78,7 @@ struct mmc_card { struct mmc_csd csd; /* card specific */ struct mmc_ext_csd ext_csd; /* mmc v4 extended card specific */ struct sd_scr scr; /* extra SD information */ + struct sd_switch_caps sw_caps; /* switch (CMD6) caps */ }; #define mmc_card_present(c) ((c)->state & MMC_STATE_PRESENT) |