linux-kernel - Re: usb gadget on zaurus and kexec

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <87wru7xc4z.fsf@free.fr>
Date:	Thu, 10 Jun 2010 15:14:52 +0200
From:	Robert Jarzmik <robert.jarzmik@...e.fr>
To:	Marek Vasut <marek.vasut@...il.com>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Eric Miao <eric.y.miao@...il.com>, dbaryshkov@...il.com,
	Cyril Hrubis <metan@....cz>, arminlitzel@....de,
	kernel list <linux-kernel@...r.kernel.org>, utx@...guin.cz,
	lenz@...wisc.edu, rpurdie@...ys.net, pave@....cz,
	thommycheck@...il.com, zaurus-devel@...ts.linuxtogo.org,
	omegamoon@...il.com
Subject: Re: usb gadget on zaurus and kexec

Marek Vasut <marek.vasut@...il.com> 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
anymore.

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.

Cheers.

--
Robert
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/