Get eMMC EXT CSD

Set block size to desired value.

reg_blocksize

xfer_blocksize

0x04

11:0

Block size value

Set up ADMA2 descriptor table (see Table: Setup ADMA2 Descriptor Table).

Data cache invalidate range.

Set transfer mode with data direction and DMA enable.

reg_transfermode

xfermode_dmaenable | xfermode_dataxferdir

0x0C

4 and 1

0x11