From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 21 Sep 2000 13:07:39 -0700 From: Tom Rini To: linuxppc-dev@lists.linuxppc.org Subject: Re: PCI bridge bases, IDE on the B&W G3 Message-ID: <20000921130739.A482@opus.bloom.county> References: <20000921214446.A865@ibrium.se> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20000921214446.A865@ibrium.se>; from samuel@ibrium.se on Thu, Sep 21, 2000 at 09:44:47PM +0200 Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: On Thu, Sep 21, 2000 at 09:44:47PM +0200, Samuel Rydh wrote: > - The B&W G3 has two PCI-buses. The second one is > accessed through a DEC,21154 controller. The expension > slots as well as the internal CMD646 IDE-controller is on > the second bus. The problem is that the bridge reports > zero in the both baseregisters (the new PCI resource > allocation scheme then fails miserably). This problem > is simply fixed by (arch/ppc/kernel/pci.c): > > void __init pcibios_fixup_bus(struct pci_bus *bus) > { > + pci_read_bridge_bases(bus); > + > if ( ppc_md.pcibios_fixup_bus ) > ppc_md.pcibios_fixup_bus(bus); > } Hmm, I wonder if this will fix all of thouse pci resource conflicts I see here. > - The pci card was never enabled. I solved this by calling > pci_enable_device(dev) by hand. But... shouldn't this really > be done automatically by the generic ide layer? Nope. the driver for that card should be doing pci_enable_device(dev). > - If yaboot loads the kernel (or the yaboot config file?) > from the ACARD IDE-bus, then the card will not work (lost > interrupts). The same problem (lost interrupts) occurs if > one tries to boot from the built-in CMD646 controller. > Possibly, IDE devices are not left in a good state by the > firmware/yaboot on the B&W G3? iirc, around 2.4.0-test5 or 6 there were some IDE updates and the only working IDE driver for us right now is/was ide-pmac. Ben knows more tho :) -- Tom Rini (TR1265) http://gate.crashing.org/~trini/ ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/