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mmc: core: Enable re-use of mmc_blk_in_tran_state()

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To allow subsequent changes to re-use the code from the static function
mmc_blk_in_tran_state(), let's move it to a public header. While at it,
let's also rename it to mmc_ready_for_data(), as to try to better describe
its purpose.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Baolin Wang <baolin.wang7@gmail.com>
Tested-by: Ludovic Barre <ludovic.barre@st.com>
Reviewed-by: Ludovic Barre <ludovic.barre@st.com>
Link: https://lore.kernel.org/r/20200204085449.32585-7-ulf.hansson@linaro.org
This commit is contained in:
Ulf Hansson 2020-02-04 09:54:43 +01:00
parent 6972096a03
commit 40c96853fe
2 changed files with 14 additions and 20 deletions
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10
include/linux/mmc/mmc.h
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@ -161,6 +161,16 @@ static inline bool mmc_op_multi(u32 opcode)
#define R1_STATE_PRG 7
#define R1_STATE_DIS 8
static inline bool mmc_ready_for_data(u32 status)
{
/*
* Some cards mishandle the status bits, so make sure to check both the
* busy indication and the card state.
*/
return status & R1_READY_FOR_DATA &&
R1_CURRENT_STATE(status) == R1_STATE_TRAN;
}
/*
* MMC/SD in SPI mode reports R1 status always, and R2 for SEND_STATUS
* R1 is the low order byte; R2 is the next highest byte, when present.