xref: /src/sys/arch/cats/pci/pcib.c

/*	$NetBSD: pcib.c,v 1.18 2021/08/07 16:18:47 thorpej 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.
 *
 * 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.
 *
 * 	from:  i386/pci/pcib.c,v 1.12
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pcib.c,v 1.18 2021/08/07 16:18:47 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <sys/bus.h>

#include <dev/isa/isavar.h>

#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>

#include <dev/pci/pcidevs.h>

#include "isadma.h"

int	pcibmatch(device_t, cfdata_t, void *);
void	pcibattach(device_t, device_t, void *);

CFATTACH_DECL_NEW(pcib, 0,
    pcibmatch, pcibattach, NULL, NULL);

void	pcib_callback(device_t);

int
pcibmatch(device_t parent, cfdata_t match, void *aux)
{
	struct pci_attach_args *pa = aux;

	/*
	 * Match tested PCI-ISA bridges.
	 */
	switch (PCI_VENDOR(pa->pa_id)) {
	case PCI_VENDOR_ALI:
		switch (PCI_PRODUCT(pa->pa_id)) {
		case PCI_PRODUCT_ALI_M1533:
			return (1);
		}
		break;
	}

	return (0);
}

void
pcibattach(device_t parent, device_t self, void *aux)
{
	struct pci_attach_args *pa = aux;
	char devinfo[256];

	printf("\n");

	/*
	 * Just print out a description and set the ISA bus
	 * callback.
	 */
	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
	printf("%s: %s (rev. 0x%02x)\n", device_xname(self), devinfo,
	    PCI_REVISION(pa->pa_class));

	/* Set the ISA bus callback */
	config_defer(self, pcib_callback);
}

void
pcib_callback(device_t self)
{
	struct isabus_attach_args iba;

	/*
	 * Attach the ISA bus behind this bridge.
	 */
	memset(&iba, 0, sizeof(iba));
	iba.iba_iot = &isa_io_bs_tag;
	iba.iba_memt = &isa_mem_bs_tag;
#if NISADMA > 0
	iba.iba_dmat = &isa_bus_dma_tag;
#endif
	config_found(self, &iba, isabusprint, CFARGS_NONE);
}