rpi3: sdhost: SDHost driver improvement
This commit improves the SDHost driver for RPi3 as following: * Unblock MMC_CMD(17). Using MMC_CMD(17) is more efficient on block reading. * In some low probability that SEND_OP_COND might results CRC7 error. We can consider that the command runs correctly. We don't need to retry this command so removing the code for retry. * Using MMC_BUS_WIDTH_1 as MMC default value to improve the stability. * Increase the clock to 50Mhz in data mode to speed up the io. * Change the pull resistors configuration to gain more stability. Signed-off-by: Ying-Chun Liu (PaulLiu) <paulliu@debian.org> |
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drivers/rpi3/sdhost/rpi3_sdhost.c |
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include/drivers/rpi3/sdhost/rpi3_sdhost.h |
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plat/rpi3/rpi3_bl2_setup.c |
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