Messages in this thread | | | Date | Fri, 11 Jan 2008 11:05:05 +0100 | From | Pierre Ossman <> | Subject | Re: [patch] split MMC_CAP_4_BIT_DATA |
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On Fri, 11 Jan 2008 04:47:44 -0500 "Mike Frysinger" <vapier.adi@gmail.com> wrote:
> Cliff should be able to enumerate the cards he has tested and the > issues he's run into. i'll see if i cant get more in depth > information from the hardware guys beyond the documentation on the sdh > already available in the hardware manual (which i'm guessing has not > been enough to appease you). >
Great. And you're right in that the spec did not give any indication that MMC shouldn't work.
I did notice one thing though. The pull-ups and pull-downs seem to be controllable. If I remember correctly, DAT3 needs to have a controller-side pull-up for MMC cards. And the docs said the default was not to provide that (in order to use the internal pull-up that most, but not all, SD cards have for detection). Might be something to look at if you haven't already.
Rgds -- -- Pierre Ossman
Linux kernel, MMC maintainer http://www.kernel.org PulseAudio, core developer http://pulseaudio.org rdesktop, core developer http://www.rdesktop.org
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