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

155 lines
4.3 KiB
C

/* $NetBSD: pcib.c,v 1.10 2001/07/22 14:34:37 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"
int pcibmatch __P((struct device *, struct cfdata *, void *));
void pcibattach __P((struct device *, struct device *, void *));
struct pcib_softc {
struct device sc_dev;
struct bebox_isa_chipset sc_chipset;
};
struct cfattach pcib_ca = {
sizeof(struct pcib_softc), pcibmatch, pcibattach
};
void pcib_callback __P((struct device *));
int pcib_print __P((void *, const char *));
extern const struct powerpc_bus_space bebox_isa_io_bs_tag;
extern const struct powerpc_bus_space bebox_isa_mem_bs_tag;
int
pcibmatch(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct pci_attach_args *pa = aux;
/*
* Match SIO(82378ZB) PCI-ISA bridge.
*/
if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL ||
PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_INTEL_SIO)
return (0);
return (1);
}
void
pcibattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct pci_attach_args *pa = aux;
char devinfo[256];
printf("\n");
/*
* 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;
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 = &bebox_isa_io_bs_tag;
iba.iba_memt = &bebox_isa_mem_bs_tag;
#if NISA > 0
iba.iba_dmat = &isa_bus_dma_tag;
#if 0
/*
* XXX THIS WILL NOT WORK, BUT ADDING SUPPORT FOR HIGHPAGE MIGHT BE
* XXX WORTH WHILE EVENTUALLY.
*/
#define SIO_DMAHIGHPAGE 0x480
if (bus_space_map(iba.iba_iot, SIO_DMAHIGHPAGE, 0xf, 0,
(bus_space_handle_t *)&iba.iba_ic))
panic("pcib_callback: can't map DMA high page registers");
#endif
#endif
config_found(&sc->sc_dev, &iba, pcib_print);
}
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);
}