SD card won't power up in OFW

[Mitch Bradley]

I think we will need to debug this problem interactively on IRC.  The 
card detection is fairly complicated, depending on v1 vs. v2 SD physical 
layer, MMC vs SD, SD vs SDHC, and on the set of operating voltages that 
the card supports.  There are too many code paths for me to guess which 
one is being chosen in your case.

I am Mitch_Bradley on #olpc-devel on irc.oftc.net

James Lee wrote:
> I hope this isn't a bad place to post this.
>
> I have a Kingston 4GB Class 4 SDHC card which I'd like to use with my XO
> (flashing, alternate distros, etc), but it does not seem to work in OFW. 
> Factory formatted, I get the following:
>
> ok dir sd:\
> SDHCI: Card didn't power up after 1 second
> Can't open directory
>
> ok test /pci/sd at c,1
> SDHCI: Card didn't power up after 1 second
> No selftest method for /pci/sd at c,1
>
> I can use this card just fine once Linux has booted.  The only other card
> I have is a SanDisk 2GB MicroSD card and it works in both OFW and Linux. 
> I don't know whether that is an HC card, though.
>
> Is SDHC just not supported in OFW?  Any suggestions?
>
> Thanks,
>
> James Lee
> jlee at thestaticvoid.org
>
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