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mmc: mmc: extend the mmc_send_tuning()

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The mmc_execute_tuning() has already prepared the opcode,
there is no need to prepare it again at mmc_send_tuning(),
and, there is a BUG of mmc_send_tuning() to determine the opcode
by bus width, assume eMMC was running at HS200, 4bit mode,
then the mmc_send_tuning() will overwrite the opcode from CMD21
to CMD19, then got error.

in addition, extend an argument of "cmd_error" to allow getting
if there was cmd error when tune response.

Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
[Ulf: Rebased patch]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Chaotian Jing 2015-10-27 14:24:28 +08:00 • committed by Ulf Hansson
parent c9b5061e77
commit 9979dbe515
9 changed files with 16 additions and 16 deletions
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2
include/linux/mmc/core.h
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@ -153,7 +153,7 @@ extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,
struct mmc_command *, int);
extern void mmc_start_bkops(struct mmc_card *card, bool from_exception);
extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int);
extern int mmc_send_tuning(struct mmc_host *host);
extern int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error);
extern int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd);
#define MMC_ERASE_ARG 0x00000000