linux-kernel - Re: PCI-ISA Bridge not operating

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Message-ID: <20080711205253.GA30670@cosmic.amd.com>
Date:	Fri, 11 Jul 2008 14:52:53 -0600
From:	Jordan Crouse <jordan.crouse@....com>
To:	David Brigada <brigad@....edu>
CC:	jim.cromie@...il.com, LKML <linux-kernel@...r.kernel.org>,
	linux-geode@...ts.infradead.org
Subject: Re: PCI-ISA Bridge not operating

On 11/07/08 16:31 -0400, David Brigada wrote:

<snip>
> >> That *is* puzzling.  When I do lspci, the entry for the IT8888G does not 
> >> appear.  I don't have much experience with PCI internals.  Would that be 
> >> because there is no driver for it in the kernel, or is there something 
> >> more insidious afoot?
> > 
> > Well - the first step would be to get a dmesg output.  if the kernel
> > is doing anything to the device at all, the dmesg will show it.
> 
> The dmesg output doesn't have anything related to the device.  I have 
> attached my dmesg output for completeness.  Ignore the last four lines, 
> that's my testing.  The PCI ID of the IT8888G is 1283:8888.

Okay - interesting.  Can you try lcpci with direct hardware access?
By default lspci only lists those devices that Linux found and
enumerated.  Direct hardware access does the CF8/CFC dance.  If 
we find it that way, then its a hunt to figure out why Linux silently
discarded it.  Also, check the I/O ports you are trying to access in
/proc/ioports to see if anybody has claimed them.

Jordan

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