[U-Boot-Users] detect MMC 4GB

Hi, I use a MMCplus 4GB on my design (with at91sam9260). It's wired with 4 bits. Currently U-boot can't detect correctly the MMC and so I can't read my Linux kernel Image on the ext3 part on this MMC. Somebody have already use it? Or somebody have already implemented the ext_csd and high capacity with MMC on another platform? Thanks in advance to help me.

Regards,

Pierre