Hi,
On Sat, May 25, 2013 at 8:32 AM, jean-francois simon <j...@themis.com> wrote: > We have a new design that is based on Freescale SABRE SD card. > We see that accesses made to the eMMC (Micron MTFC64GJVDN-4M ) are not > working. > We have placed the eMMC on SD3 (SD4 on Sabre SD). We want to use it in > 8bit bus width, DDR, fast speed. > The very first command sent to the device hangs. The hang happens in > this function, when the mmc driver is waiting for an interrupt to > occur: > .... Still stuck on this. A naive question: Does u-boot mmc driver support dual data rate? I am not sure looking at the code. I see mentions of version 4.4 and higher, but nothing about DDR. I am very ignorant of MMC stuff and even looking at the jedec 4.4 spec, I am not sure if 4.4 support means DDR is mandatory. I saw this u-boot thread: http://www.mail-archive.com/u-boot@lists.denx.de/msg78023.html and I wonder it is still the same situation? If we hack the Freescale 2009 u-boot to make it run on our design, the eMMC works just fine. What should I do? start from Freescale driver and try to port it to u-boot? I am kind in the dark here , looking which way to go. Thanks for any help, -jfs _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot