On Tuesday, December 27, 2011 04:16:31 AM James Bartlett wrote: > I'm trying to enable the SDHC controller under Linux running on the > ordb2a-ep4ce22 board. I'm very stuck; mainly because I'm a newbie, so > could anyone give me pointers as to go about this?
I've been working on this section for a while. The SD controller as currently published isn't quite generic enough for Linux MMC support, and I haven't found a driver for it. orpmon does support reading from it, but with rather fragile code. I have a u-boot driver which may be ported into Linux once it works. Currently it fails at a detection stage, trying to do a short 1-bit read of a configuration register via the data bus. The SD controller on opencores doesn't support either (1-bit or short block), but the one in the ordb2a internal repository has code for it (I intend to push it back once that works). On that note, really sorry about our backwards order! We were a bit rushed getting the ORDB2A out, and still need to submit the board port into the main orpsocv2 repository. _______________________________________________ OpenRISC mailing list [email protected] http://lists.openrisc.net/listinfo/openrisc
