On Fri, 28 May 2004 15:15:22 -0700
David Brownell wrote:
> 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?
Those message are present only when I use the power switching flag. I
had not seen them before (and I've been looking at USB messages for
about 10 days).
> 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
I'll experiment some this weekend and let you know what happens :-)
Have a good 'un.
David
Osage Software Systems, Inc. [EMAIL PROTECTED]
Ann Arbor, MI 48103 www.osagesoftware.com tel: 734.821.8800
-------------------------------------------------------
This SF.Net email is sponsored by: Oracle 10g
Get certified on the hottest thing ever to hit the market... Oracle 10g.
Take an Oracle 10g class now, and we'll give you the exam FREE.
http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click
_______________________________________________
[EMAIL PROTECTED]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
