I added Micron MTFC16GJVEC-2M WT, which is 16 GB v4.41 eMMC chip to my custom TMS320C6748 based board.
What I found out is that PSP 03.00.01.00 drivers do not support eMMC out of the box. They try to open it in byte access mode instead of sector acces mode, therefore response to CMD1 will be always busy. I managed to change this behavior and got beyond init. Next hurdle is that I guess driver read info about card capacity from CSD register instead of EXT_CSD.
I try to create a patch to overcome these problems, however my question is that maybe this is already sorted out somewhere. Maybe I could get newer version from PSP drivers.
I am not tested it yet, however I bet there are the same problem with ROM bootloader, which might not support boot from eMMC at all. Does someone know if this is true?
Andres