Re: OMAP3430: MUSB host and hot-plugging

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On Thu, Mar 20, 2008 at 01:25:28PM -0700, David Brownell wrote:
> On Thursday 20 March 2008, Felipe Balbi wrote:
> > Could it be some
> > problem in the ULPI support for omap3 that's preventing musb to wake up
> > and switch to host role ?
> 
> Your theory is as good as mine; I don't have that hardware.
> 
> I was just pointing out that this specific area has always
> been a significant PITA for the MUSB silicon ... I'm not the
> only developer who's ended up losing weeks of time chasing
> (undocumented) bogosity in the area of host-side startup.
> 
> The thing is that making it "switch to host role" is the
> very black magic that regularly misbehaved.  ISTR there was
> a chicken/egg thing going on:  it couldn't know it needed to
> switch to "host role" unless the oddball Mentor "session"
> was already active, but it couldn't be activated unless you
> somehow knew it should be in host role...

Hmm... thanks for the tips Dave, I'll re-check that programmers guide
again tomorrow and try to debug a bit more.

-- 
Best Regards,

Felipe Balbi
me@xxxxxxxxxxxxxxx
http://blog.felipebalbi.com
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