[Trac #1227] OFW can't access SDHC card

[Zarro Boogs per Child]

#1227: OFW can't access SDHC card
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 Reporter:  gnu                  |       Owner:  wmb at firmworks.com
     Type:  defect               |      Status:  new              
 Priority:  normal               |   Milestone:  Untriaged        
Component:  ofw - open firmware  |    Keywords:                   
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 Using Q2B83 firmware, I tried running the SD card speed test from bug
 #397.  This worked fine with a Corsair "60x" 2GB SD Flash Media Card
 (getting abuot 16.5 MBytes/sec).  When I replaced that card with an A-Data
 4GB Turbo SDHC 2.0 "150x" (also sold as a "class 6", though only some of
 them are physically labeled that way), OFW hung when doing:

 ok select /sd

 ok attach-card .

 [hangs for at least minutes here]

 If we want to be able to boot/upgrade from SD cards, OFW should support
 SDHC.  It's just a few modifications (that Pierre has already figured out
 for the kernel driver).

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Ticket URL: <http://dev.laptop.org/ticket/1227>
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