xref: /src/sys/arch/evbmips/loongson/bonito_mainbus.c

/*	$NetBSD: bonito_mainbus.c,v 1.6 2022/03/03 06:27:21 riastradh Exp $	*/

/*-
 * Copyright (c) 2001 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: bonito_mainbus.c,v 1.6 2022/03/03 06:27:21 riastradh Exp $");

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

#include <sys/bus.h>

#include <mips/cpuregs.h>
#include <mips/bonito/bonitoreg.h>

#include <evbmips/loongson/autoconf.h>
#include <evbmips/loongson/loongson_bus_defs.h>
#include <dev/pci/pcivar.h>

static int	bonito_mainbus_match(device_t, cfdata_t, void *);
static void	bonito_mainbus_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(bonito_mainbus, 0,
    bonito_mainbus_match, bonito_mainbus_attach, NULL, NULL);

extern struct cfdriver bonito_cd;

int
bonito_mainbus_match(device_t parent, cfdata_t cf, void *aux)
{
	struct mainbus_attach_args * const maa = aux;

	if (strcmp(maa->maa_name, bonito_cd.cd_name) == 0)
		return (1);

	return (0);
}

void
bonito_mainbus_attach(device_t parent, device_t self, void *aux)
{
	struct pcibus_attach_args pba;
	pcireg_t rev;
	bool compatible;

	device_set_private(self, __UNCONST(&sys_platform->bonito_config));

	/*
	 * Loongson 2F processors do not use a real Bonito64 chip but
	 * their own derivative, which is no longer 100% compatible.
	 * We need to make sure we never try to access an unimplemented
	 * register...
	 */
	if (loongson_ver >= 0x2f)
		compatible = false;
	else
		compatible = true;

	/*
	 * There is only one PCI controller on a Loongson chip.
	 */

	rev = PCI_REVISION(REGVAL(BONITO_PCICLASS));
	if (compatible) {
		aprint_normal(": BONITO Memory and PCI controller,"
		    " %s rev. %d.%d\n", BONITO_REV_FPGA(rev) ? "FPGA" : "ASIC",
		    BONITO_REV_MAJOR(rev), BONITO_REV_MINOR(rev));
	} else {
		aprint_normal(": Memory and PCI-X controller, rev. %d\n",
		    PCI_REVISION(rev));
	}

	/*
	 * Attach PCI bus.
	 */

	pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY;
	pba.pba_bus = 0;
	pba.pba_bridgetag = NULL;

	pba.pba_iot = &bonito_iot;
	pba.pba_memt = &bonito_memt;
	pba.pba_dmat = &bonito_dmat;
	pba.pba_dmat64 = NULL;
	pba.pba_pc = &bonito_pc;

	config_found(self, &pba, pcibusprint, CFARGS_NONE);
}