Date: Thu, 16 Nov 2000 11:56:09 -0800 (PST) From: Bill Paul <wpaul@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/pci if_pcn.c Message-ID: <200011161956.LAA38439@freefall.freebsd.org>
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wpaul 2000/11/16 11:56:09 PST
Modified files:
sys/pci if_pcn.c
Log:
When checking the device code in the probe routine, leave the chip in
16-bit mode. Technically, pcn_probe() is destructive because once the
chip goes into 32-bit mode, the only way to get it out again is a
hardware reset. And once the device is in 32-bit mode, the lnc driver
won't be able to talk to it. So if pcn_probe() is called before the
lnc probe routine, and pcn_probe() rejects the chip as one it doesn't
support, the lnc driver will be SOL.
I don't like this. I think it's a design flaw that you can't switch
the chip out of 32-bit mode once it's selected. The only 'right'
solution is for the pcn driver to support all of the PCI devices
in 32-bit mode, however I don't have samples of all the PCnet series
cards for testing.
Revision Changes Path
1.12 +24 -5 src/sys/pci/if_pcn.c
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