Date: Mon, 18 Aug 2003 16:18:52 +0200 From: Igor Pokrovsky <igor.pokrovsky@cnrm.meteo.fr> To: Bruce M Simpson <bms@spc.org>, Igor Pokrovsky <igor.pokrovsky@cnrm.meteo.fr>, freebsd-hackers@freebsd.org Subject: Re: PCI quirk Message-ID: <20030818141852.GA40572@exmatis1.cnrm.meteo.fr> In-Reply-To: <20030818141217.GD21219@spc.org> References: <20030818124841.GA35843@exmatis1.cnrm.meteo.fr> <20030818141217.GD21219@spc.org>
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On Mon, Aug 18, 2003 at 03:12:17PM +0100, Bruce M Simpson wrote: > On Mon, Aug 18, 2003 at 02:48:41PM +0200, Igor Pokrovsky wrote: > > Hello all, > > > > I'd like to add a PCI quirk, which will enable SMBus on boot > > (it gets disabled by BIOS). What is the best place in kernel > > to do this? I looked through PCI sources, but haven't found > > any suitable place for that (not like in USB case). > > This sounds like perhaps you need to add a patch tied to your southbridge. > > Generally the SMBus interface hangs off the southbridge or a power management > controller. But you haven't told us which one, so any advice we may be able > to give you is largely academic. > > Do you know the PCI ID of the *function* that implements the SMBus interface > in your system? If so, grep through the kernel source and find which driver > is attached to it, if any. If not, pciconf -lv is a good place to start. Yes, I have all information. I need to do the similar thing in kernel: pciconf -w -h pci0:31:0 0xf2 0 Generally according to datashit I have to turn off zero and third bits of 0xf2, but in fact zeroing whole 2 bytes of 0xf2 works also. And I'm searching for a right place to add this. -ip -- Write-Protect Tab, n.: A small sticker created to cover the unsightly notch carelessly left by disk manufacturers. The use of the tab creates an error message once in a while, but its aesthetic value far outweighs the momentary inconvenience. -- Robb Russon
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