linux-kernel - Re: via irq quirk breakage

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Date:	Tue, 30 Jan 2007 09:50:06 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Alan <alan@...rguk.ukuu.org.uk>
CC:	Jean Delvare <jdelvare@...e.de>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Daniel Drake <dsd@...ctivated.net>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Adrian Bunk <bunk@...sta.de>
Subject: Re: via irq quirk breakage

Alan wrote:
>> You have an old VT82C686 south bridge, which was tagged as "special" by
>> Alan. For this chip, Alan's code only allows devices 00:00.x to be quirked.
>> As my code was merely a reimplementation of Alan's idea, it does the same.
>> Your USB controllers are at 00:07.x, so I'm not surprised they weren't
>> quirked.
>>
>> Alan, why were dev_lo and dev_hi both set to 0 for the VT82C868 in your
>> implementation? Is it a typo, or...?
> 
> According to the documentation the VT82C686 has the following devices on
> the internal bus: bus 0 dev ? fn 0-6.  dev ? being the device of the
> bridge itself. Re-reading the docs unlike the other the PCI idents aren't
> fixed so my assumption of dev 0 is actually unsafe. I can't see anything
> in the doc which guarantees 7 either.


BTW, older VIA docs are publicly archived at 
http://gkernel.sourceforge.net/specs/via/

	Jeff



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