On Thu, Mar 26, 2009 at 6:13 AM, Shankar Ganesh <shankarganeshk@xxxxxxxxx> wrote: > > On Thu, Mar 26, 2009 at 2:16 PM, Adrian Hunter <adrian.hunter@xxxxxxxxx> > wrote: >> >> twebb wrote: >>> >>> On Wed, Mar 25, 2009 at 10:13 AM, twebb <taliaferro62@xxxxxxxxx> wrote: >>>> >>>> I'm currently using linux-omap-2.6.27 (tag=omap1) and trying to add >>>> MMC2 support. I've back ported what I think I need from various files >>>> inn l-o-2.6.28-omap1. I will eventually move to 2.6.28-omap1 but for >>>> now am trying to get it working on 2.6.27. >>>> >>>> Traces show that all looks good up until first command is issued, then >>>> nothing seems to happen. STAT reg shows 0, don't see clock or cmd >>>> activity. MMC1 is working fine with an SD card; MMC2 is connected to >>>> eMMC flash. Seems like I'm missing something basic like a clock or >>>> enable, though I've confirmed ICLK and FCLK are enabled. Any ideas? >>>> >>>> Thanks, >>>> twebb >>>> >>> >>> I found at least part of my problem. SDVS field of HCTL was being set >>> to 0x7 (3.3V) instead of 0x5 (1.8V), and apparently MMC2 must be set >>> for 0x5. >>> -- >>> To unsubscribe from this list: send the line "unsubscribe linux-omap" in >>> the body of a message to majordomo@xxxxxxxxxxxxxxx >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>> >> >> The most up to date omap_hsmmc.c is here: >> >> >> http://git.kernel.org/?p=linux/kernel/git/drzeus/mmc.git;a=blob;f=drivers/mmc/host/omap_hsmmc.c;h=488f222054f8a1493142d02da526c951def5ddfe;hb=next >> >> That includes the 10 patches on LKML except number 8 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-omap" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > > Refer http://git.omapzoom.com/?p=repo/omapkernel.git;a=summary ; has working > MMC2 code. Also this version detects eMMC on MMC2 > I'm having difficulty detecting eMMC flash on MMC2. I ported in the code from the git, and most everything looks good. However, it always fails detecting the eMMC with a timeout. If I handpoke commands to the eMMC I see the same thing - even with the most basic commands. I see CLK and CMDs going to the eMMC, but never see any responses on the CMD line from the eMMC. Any ideas what I might be doing wrong? (I do have an SD card working fine on MMC1. Also, the eMMC flash is hardwired with power and has no CardDetect or WriteProtect logic - so none of that should be an issue.) Help, twebb (sorry for double posting) -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
