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mmc: support packed write command for eMMC4.5 device

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This patch supports packed write command of eMMC4.5 device.
Several writes can be grouped in packed command and all data
of the individual commands can be sent in a single transfer
on the bus.

[tlinder@codeaurora.org: Difference in definition:
R1_EXP_EVENT -- > R1_EXCEPTION_EVENT]

(cherry picked from commit 53f8f574c6c68687098cd064af8224da44de2484)

Change-Id: I26ee7c0b957a3aec5e4ffc6d6df806ea38435784
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Reviewed-by: Maya Erez <merez@codeaurora.org>
Reviewed-by: Namjae Jeon <linkinjeon@gmail.com>
Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
(cherry picked from commit 6d24bc3b6e86412cbfbc37377bbbf196cbdebce9)
This commit is contained in:
Seungwon Jeon
2012-09-27 15:00:26 +02:00
committed by Stephen Boyd
parent 20bafab63b
commit 37e288ec83
6 changed files with 444 additions and 19 deletions
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5
include/linux/mmc/card.h
View File

@@ -300,6 +300,11 @@ static inline void mmc_part_add(struct mmc_card *card, unsigned int size,
card->nr_parts++;
}
static inline bool mmc_large_sec(struct mmc_card *card)
{
return card->ext_csd.data_sector_size == 4096;
}
/*
* The world is not perfect and supplies us with broken mmc/sdio devices.
* For at least some of these bugs we need a work-around.

4
include/linux/mmc/core.h
View File

@@ -18,6 +18,9 @@ struct mmc_request;
struct mmc_command {
u32 opcode;
u32 arg;
#define MMC_CMD23_ARG_REL_WR (1 << 31)
#define MMC_CMD23_ARG_PACKED ((0 << 31) | (1 << 30))
#define MMC_CMD23_ARG_TAG_REQ (1 << 29)
u32 resp[4];
unsigned int flags; /* expected response type */
#define MMC_RSP_PRESENT (1 << 0)
@@ -148,6 +151,7 @@ extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,
extern void mmc_start_bkops(struct mmc_card *card, bool from_exception);
extern int __mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int, bool);
extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int);
extern int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd);
#define MMC_ERASE_ARG 0x00000000
#define MMC_SECURE_ERASE_ARG 0x80000000