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/* $OpenBSD: pcib.c,v 1.4 2012/08/18 16:00:20 miod Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/bus.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <dev/isa/isavar.h>
#include <dev/pci/glxreg.h>
#include <dev/pci/glxvar.h>
#include "isa.h"
int pcibmatch(struct device *, void *, void *);
void pcibattach(struct device *, struct device *, void *);
struct pcib_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_tag_t sc_memt;
bus_dma_tag_t sc_dmat;
};
const struct cfattach pcib_ca = {
sizeof(struct pcib_softc), pcibmatch, pcibattach
};
void pcib_callback(struct device *);
void pcib_isa_attach(struct pcib_softc *, bus_space_tag_t, bus_space_tag_t,
bus_dma_tag_t);
int pcib_print(void *, const char *);
struct cfdriver pcib_cd = {
NULL, "pcib", DV_DULL
};
int
pcibmatch(struct device *parent, void *match, void *aux)
{
struct pci_attach_args *pa = aux;
switch (PCI_VENDOR(pa->pa_id)) {
case PCI_VENDOR_INTEL:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_INTEL_SIO:
case PCI_PRODUCT_INTEL_82371MX:
case PCI_PRODUCT_INTEL_82371AB_ISA:
case PCI_PRODUCT_INTEL_82440MX_ISA:
/* The above bridges mis-identify themselves */
return (1);
}
break;
case PCI_VENDOR_SIS:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_SIS_85C503:
/* mis-identifies itself as a miscellaneous prehistoric */
return (1);
}
break;
case PCI_VENDOR_VIATECH:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_VIATECH_VT82C686A_SMB:
/* mis-identifies itself as a ISA bridge */
return (0);
}
break;
}
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA)
return (1);
return (0);
}
void
pcibattach(struct device *parent, struct device *self, void *aux)
{
struct pcib_softc *sc = (struct pcib_softc *)self;
struct pci_attach_args *pa = (struct pci_attach_args *)aux;
printf("\n");
/*
* If we are actually a glxpcib, we can't use softc fields
* beyond the base struct device, for this would corrupt
* the glxpcib softc. Decide to attach isa immediately in this
* case - glxpcib-based designs are not expected to have ISA
* slots and attaching isa early should not cause problems.
*/
if (strncmp(self->dv_xname, "glxpcib", 7) == 0) {
pcib_isa_attach(sc, pa->pa_iot, pa->pa_memt, pa->pa_dmat);
} else {
/*
* Wait until all PCI devices are attached before attaching isa;
* existing pcib code on other platforms mentions that not
* doing this ``might mess the interrupt setup on some
* systems'', although this is very unlikely to be the case
* on loongson.
*/
sc->sc_iot = pa->pa_iot;
sc->sc_memt = pa->pa_memt;
sc->sc_dmat = pa->pa_dmat;
config_defer(self, pcib_callback);
}
}
void
pcib_callback(struct device *self)
{
struct pcib_softc *sc = (struct pcib_softc *)self;
pcib_isa_attach(sc, sc->sc_iot, sc->sc_memt, sc->sc_dmat);
}
void
pcib_isa_attach(struct pcib_softc *sc, bus_space_tag_t iot,
bus_space_tag_t memt, bus_dma_tag_t dmat)
{
struct isabus_attach_args iba;
/*
* Attach the ISA bus behind this bridge.
*/
memset(&iba, 0, sizeof(iba));
iba.iba_busname = "isa";
iba.iba_iot = iot;
iba.iba_memt = memt;
#if NISADMA > 0
iba.iba_dmat = dmat;
#endif
iba.iba_ic = sys_platform->isa_chipset;
if (iba.iba_ic != NULL)
config_found(&sc->sc_dev, &iba, pcib_print);
}
int
pcib_print(void *aux, const char *pnp)
{
/* Only ISAs can attach to pcib's; easy. */
if (pnp)
printf("isa at %s", pnp);
return (UNCONF);
}
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