935a665e15
This patch implement hw_reset function for DesignWare MMC controller. By adding this feature, mmc blk can do some basic recovery. Set the following resets: software reset – BMOD[0] for IDMAC only DMA reset - CTRL[2] FIFO reset - CTRL[1] bits Program the CARD_RESET register with a value of 0 for the bit corresponding to the card number; This programming asserts the RST_n signal and resets the card. After a minimum of 1 ?s, de-asserts the RST_n signal and takes the card out of reset. The application can program a new CMD only after a minimum of 200 us This implementation can be easily tested by cutting off->On vmmc while doing data accessing in background to simulate that case. Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> |
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| card | ||
| core | ||
| host | ||
| Kconfig | ||
| Makefile | ||