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mmc: dw_mmc: Add a timeout for sending CMD11

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In the Designware databook's description of the "Voltage Switch Normal
Scenario" it instructs us to set a timer and fail the voltage change
if we don't see the voltage change interrupt within 2ms.  Let's
implement that.  Without implementing this I have often been able to
reproduce a hang while trying to send CMD11 on an rk3288-based board
while constantly ejecting and inserting UHS cards.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Doug Anderson
2015-03-09 16:18:21 -07:00
committed by Ulf Hansson
parent 488b8d63a6
commit 5c935165da
2 changed files with 28 additions and 0 deletions
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include/linux/mmc/dw_mmc.h
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@@ -202,6 +202,8 @@ struct dw_mci {
int irq;
int sdio_id0;
struct timer_list cmd11_timer;
};
/* DMA ops for Internal/External DMAC interface */