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mmc: core: retry CMD1 in mmc_send_op_cond() even if the ocr = 0

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According to eMMC specification v5.1 section 6.4.3, we should issue
CMD1 repeatedly in the idle state until the eMMC is ready even if
the mmc_attach_mmc() calls this function with ocr = 0. Otherwise
some eMMC devices seems to enter the inactive mode after
mmc_init_card() issued CMD0 when the eMMC device is busy.

Change-Id: I7f91d9c20ab75842f00b3c9edfb738715963af6f
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
This commit is contained in:
Shawn Lin
2019-04-18 15:40:46 +08:00
committed by Tao Huang
parent c43cd9e00c
commit 5ecc90c53c
1 changed files with 11 additions and 5 deletions
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16
drivers/mmc/core/mmc_ops.c
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@@ -197,11 +197,7 @@ int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
if (err)
break;
/* if we're just probing, do a single pass */
if (ocr == 0)
break;
/* otherwise wait until reset completes */
/* wait until reset completes */
if (mmc_host_is_spi(host)) {
if (!(cmd.resp[0] & R1_SPI_IDLE))
break;
@@ -213,6 +209,16 @@ int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
err = -ETIMEDOUT;
mmc_delay(10);
/*
* According to eMMC specification v5.1 section 6.4.3, we
* should issue CMD1 repeatedly in the idle state until
* the eMMC is ready. Otherwise some eMMC devices seem to enter
* the inactive mode after mmc_init_card() issued CMD0 when
* the eMMC device is busy.
*/
if (!ocr && !mmc_host_is_spi(host))
cmd.arg = cmd.resp[0] | BIT(30);
}
if (rocr && !mmc_host_is_spi(host))