xref: /src/sys/arch/sparc/dev/dma_obio.c

/*	$NetBSD: dma_obio.c,v 1.13 2023/12/20 05:33:18 thorpej Exp $ */

/*-
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Paul Kranenburg.
 *
 * 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: dma_obio.c,v 1.13 2023/12/20 05:33:18 thorpej Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/device.h>

#include <sys/bus.h>
#include <machine/autoconf.h>
#include <machine/cpu.h>

#include <dev/sbus/sbusvar.h>

#include <dev/ic/lsi64854reg.h>
#include <dev/ic/lsi64854var.h>

int	dmamatch_obio(device_t, cfdata_t, void *);
void	dmaattach_obio(device_t, device_t, void *);

CFATTACH_DECL_NEW(dma_obio, sizeof(struct lsi64854_softc),
    dmamatch_obio, dmaattach_obio, NULL, NULL);

int
dmamatch_obio(device_t parent, cfdata_t cf, void *aux)
{
	union obio_attach_args *uoba = aux;
	struct obio4_attach_args *oba;

	if (uoba->uoba_isobio4 == 0)
		return 0;

	oba = &uoba->uoba_oba4;
	return bus_space_probe(oba->oba_bustag, oba->oba_paddr,
				4,	/* probe size */
				0,	/* offset */
				0,	/* flags */
				NULL, NULL);
}


void
dmaattach_obio(device_t parent, device_t self, void *aux)
{
	struct lsi64854_softc *sc = device_private(self);
	union obio_attach_args *uoba = aux;
	struct obio4_attach_args *oba = &uoba->uoba_oba4;

	sc->sc_dev = self;
	sc->sc_bustag = oba->oba_bustag;
	sc->sc_dmatag = oba->oba_dmatag;

	if (bus_space_map(oba->oba_bustag, oba->oba_paddr,
			  4 * sizeof(uint32_t),
			  0, &sc->sc_regs) != 0) {
		aprint_error(": cannot map registers\n");
		return;
	}

	/* Any point in setting `sc_burst' to anything here? */
	sc->sc_channel = L64854_CHANNEL_SCSI;
	lsi64854_attach(sc);
}