Implement a simple generic PCI-ISA bridge driver. This driver exists
primarily to nicely print version information about your PCI chipset (try with "options PCIVERBOSE"). Eventually, it may be used to enable/disable features/bugs of a given PCI chipset. In addition, this driver uses the PCI-ISA bridge callback mechanism to logically attach the ISA bus to the PCI-ISA bridge.
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thorpej
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/* $NetBSD: pcib.c,v 1.1 1996/11/28 02:53:45 thorpej Exp $ */
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/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <machine/bus.h>
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#include <dev/isa/isavar.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcidevs.h>
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int pcibmatch __P((struct device *, void *, void *));
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void pcibattach __P((struct device *, struct device *, void *));
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struct cfattach pcib_ca = {
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sizeof(struct device), pcibmatch, pcibattach
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};
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struct cfdriver pcib_cd = {
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NULL, "pcib", DV_DULL
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};
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void pcib_callback __P((void *));
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int pcib_print __P((void *, const char *));
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int
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pcibmatch(parent, match, aux)
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struct device *parent;
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void *match, *aux;
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{
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struct pci_attach_args *pa = aux;
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/*
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* Match all known PCI-ISA bridges.
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*/
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if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_INTEL) {
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switch (PCI_PRODUCT(pa->pa_id)) {
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case PCI_PRODUCT_INTEL_SIO:
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case PCI_PRODUCT_INTEL_PCIB:
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case PCI_PRODUCT_INTEL_82471:
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case PCI_PRODUCT_INTEL_82371SB:
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return (1);
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}
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}
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if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_UMC) {
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switch (PCI_PRODUCT(pa->pa_id)) {
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case PCI_PRODUCT_UMC_UM8886F:
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return (1);
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}
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}
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return (0);
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}
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void
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pcibattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct pci_attach_args *pa = aux;
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char devinfo[256];
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printf("\n");
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/*
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* Just print out a description and set the ISA bus
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* callback.
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*/
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pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
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printf("%s: %s (rev. 0x%02x)\n", self->dv_xname, devinfo,
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PCI_REVISION(pa->pa_class));
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set_pci_isa_bridge_callback(pcib_callback, self);
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}
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void
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pcib_callback(arg)
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void *arg;
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{
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struct device *self = arg;
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struct isabus_attach_args iba;
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/*
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* Attach the ISA bus behind this bridge.
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*/
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bzero(&iba, sizeof(iba));
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iba.iba_busname = "isa";
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iba.iba_iot = I386_BUS_SPACE_IO;
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iba.iba_memt = I386_BUS_SPACE_MEM;
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config_found(self, &iba, pcib_print);
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}
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int
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pcib_print(aux, pnp)
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void *aux;
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const char *pnp;
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{
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/* Only ISAs can attach to pcib's; easy. */
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if (pnp)
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printf("isa at %s", pnp);
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return (UNCONF);
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}
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