Re: usb gadget on zaurus and kexec

From: Robert Jarzmik
Date: Thu Jun 10 2010 - 09:15:23 EST

Marek Vasut <marek.vasut@xxxxxxxxx> writes:

>> > Dumping out the registers of the two situations and doing a comparison
>> > then might be a quick way.
>> Any debugging update on this?
> Yeah, there's a workaround. Cyril's working on a proper fix, but that might take
> some time. Simply -- UP2OCR is misconfigured.

That's quite interesting. In the pxa27x_udc gadget driver, I seem to have a
regression on the resume from suspend to RAM path. My USB UDC is not enumerated

The might be a correlation, as UP2OCR is lost in the suspend process. I'm very
interested by your analysis of the issue you have on kexec, as that might ease
my work :)

Besides, it's been some time I've been thinking that the pxa deserves a proper
encapsulation of the USB internal routing paths (ie. a proper way to switch from
usb host handled by ohci-pxa27x to an usb client handled by pxa2x_udc), to
reflect the setup of the Pad Unit (see TRM chapter 12.4 : tables 12.2, 12.15,
12.17, 12.18 and 12.19).

Whatever you find on the USB Port2 configuration register would help me design
the Pad block.


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