NetBSD/sys/arch/prep/pci/pcib.c

187 lines
4.8 KiB
C

/* $NetBSD: pcib.c,v 1.5 2001/07/22 14:58:20 wiz Exp $ */
/*-
* Copyright (c) 1996, 1998 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 REGENTS 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/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <dev/isa/isavar.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
#include "isa.h"
#include "isadma.h"
int pcibmatch(struct device *, struct cfdata *, void *);
void pcibattach(struct device *, struct device *, void *);
struct pcib_softc {
struct device sc_dev;
struct prep_isa_chipset sc_chipset;
};
struct cfattach pcib_ca = {
sizeof(struct pcib_softc), pcibmatch, pcibattach
};
void pcib_callback(struct device *);
int pcib_print(void *, const char *);
int
pcibmatch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct pci_attach_args *pa = aux;
/*
* Match PCI-ISA bridge.
*/
if (PCI_CLASS(pa->pa_class) == PCI_CLASS_BRIDGE &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_BRIDGE_ISA) {
return (1);
}
/*
* some special cases:
*/
switch (PCI_VENDOR(pa->pa_id)) {
case PCI_VENDOR_INTEL:
switch (PCI_PRODUCT(pa->pa_id)) {
case PCI_PRODUCT_INTEL_SIO:
/*
* The Intel SIO identifies itself as a
* miscellaneous prehistoric.
*/
return (1);
}
break;
}
return (0);
}
void
pcibattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct pci_attach_args *pa = aux;
char devinfo[256];
u_int32_t v;
int lvlmask = 0;
printf("\n");
v = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x40);
if ((v & 0x20) == 0) {
printf("%s: PIRQ[0-3] not used\n", self->dv_xname);
} else {
v = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x60);
if ((v & 0x80808080) == 0x80808080) {
printf("%s: PIRQ[0-3] disabled\n", self->dv_xname);
} else {
int i;
printf("%s:", self->dv_xname);
for (i = 0; i < 4; i++, v >>= 8) {
if ((v & 80) == 0 && (v & 0x0f) != 0) {
printf(" PIRQ[%d]=%d", i, v & 0x0f);
lvlmask |= (1 << (v & 0x0f));
}
}
printf("\n");
}
}
#if NISA > 0
/* Initialize interrupt controller */
init_icu(lvlmask);
#endif
/*
* Just print out a description and defer configuration
* until all PCI devices have been attached.
*/
pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
printf("%s: %s (rev. 0x%02x)\n", self->dv_xname, devinfo,
PCI_REVISION(pa->pa_class));
config_defer(self, pcib_callback);
}
void
pcib_callback(self)
struct device *self;
{
struct pcib_softc *sc = (struct pcib_softc *)self;
#if NISA > 0
struct isabus_attach_args iba;
/*
* Attach the ISA bus behind this bridge.
*/
memset(&iba, 0, sizeof(iba));
iba.iba_busname = "isa";
iba.iba_ic = &sc->sc_chipset;
iba.iba_iot = &prep_isa_io_space_tag;
iba.iba_memt = &prep_isa_mem_space_tag;
#if NISADMA > 0
iba.iba_dmat = &isa_bus_dma_tag;
#endif
config_found(&sc->sc_dev, &iba, pcib_print);
#endif
}
int
pcib_print(aux, pnp)
void *aux;
const char *pnp;
{
/* Only ISAs can attach to pcib's; easy. */
if (pnp)
printf("isa at %s", pnp);
return (UNCONF);
}