David Relson wrote:
Hi Dave,
The results are below. What they mean is outside my expertise :-<
Hmm, as I suspected: nothing very informative.
Except that it looks like the root hub has some overcurrent issues ... was that only when you modprobed with the power switching flag?
The OHCI hardware has several options that the OHCI HCD has always (since 2.2.early) overridden, seemingly because on at least some early boards the BIOS didn't initialize things correctly. The key things relate to power switching and overcurrent reporting ... each one can optionally be supported not at all, with multiport gangs, or with per-port switching.
Now, I've always suspected that the hub driver doesn't deal with all the possible combinations correctly, and have never quite trusted how OHCI initializes it. In fact I've been tempted to add a mode that actually uses the mode the BIOS set up. Maybe in 2.7 that should become the default.
I don't have time right now to look at that, but if you wanted to experiment, change hc_start(), the "handle root hub init quirks" ... the write to roothub.a is what overrides the BIOS defaults. Rebuild, and cold boot.
- Dave
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