Hi all, I have basically adapted the linux esdhc driver for the mx35 for uboot. I am using the mmc_init routine in fsl_esdhc driver for the initialization sequence including the "IDentification cycle" for the card. The issue is that i have a particular card from vendor "Kingston" which works rock solid withput any problems and after hooking the driver with the FAT32 infrstructure in uboot, i can use file api' just fine on it.
But a card from another vendor behaves in a peculiar way. Ifi soft reset my initialization sequence just runs fine and the card is succesfully identified( OCR, voltage validation and RCA get identified succesfully). But out of a hard reset, the card fails initialzation and "mmc_init" retrurn error. Even while using it in linux, there are occasional issues with the uninitialization/initialization cycle as the initialaztion fails every alternate time. I had the same card working on the mx27 platform using the same approach of porting the linux driver over to uboot(the only difference being this is a polled version rather thatn interrupts and DMA). Please let me know if it could be the issue out of a hard rest with the eSDHC(enhance host controller) misbehaving for this particular card. Adding delay before the Card/host reset/init sequence does not help. Thanks, Alfred. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
