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mmc: sdhci: clear auto cmd setting bits for no data cmds

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The auto cmd settings bits should be cleared before sending new commands
or we may receive command timeout error for normal commands due to wrongly
pre-sent auto cmd.

e.g. we receive CMD13 timeout error due to ACMD23 is wrongly enabled
by former data commands.

mmc2: new high speed DDR MMC card at address 0001
mmcblk1: mmc2:0001 SEM08G 7.39 GiB
mmcblk1boot0: mmc2:0001 SEM08G partition 1 2.00 MiB
mmcblk1boot1: mmc2:0001 SEM08G partition 2 2.00 MiB
mmcblk1rpmb: mmc2:0001 SEM08G partition 3 128 KiB
 mmcblk1: p1 p2 p3 p4 < p5 p6 p7 >
mmc2: Timeout waiting for hardware interrupt.
 mmcblk1boot1: unknown partition table
mmc2: Timeout waiting for hardware interrupt.
 mmcblk1boot0: unknown partition table

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Dong Aisheng 2013-10-30 22:09:48 +08:00 committed by Chris Ball
parent 0e4b0743bb
commit 2b558c13df
1 changed files with 6 additions and 1 deletions
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7
drivers/mmc/host/sdhci.c
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@ -898,8 +898,13 @@ static void sdhci_set_transfer_mode(struct sdhci_host *host,
u16 mode;
struct mmc_data *data = cmd->data;
if (data == NULL)
if (data == NULL) {
/* clear Auto CMD settings for no data CMDs */
mode = sdhci_readw(host, SDHCI_TRANSFER_MODE);
sdhci_writew(host, mode & ~(SDHCI_TRNS_AUTO_CMD12 |
SDHCI_TRNS_AUTO_CMD23), SDHCI_TRANSFER_MODE);
return;
}
WARN_ON(!host->data);