NetBSD/sys/arch/sparc/dev/dma_obio.c

/*	$NetBSD: dma_obio.c,v 1.9 2005/11/16 00:49:03 uwe 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.
 * 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 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 1.9 2005/11/16 00:49:03 uwe 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/malloc.h>

#include <machine/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(struct device *, struct cfdata *, void *);
void	dmaattach_obio(struct device *, struct device *, void *);

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

int
dmamatch_obio(struct device *parent, struct cfdata *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(struct device *parent, struct device *self, void *aux)
{
	union obio_attach_args *uoba = aux;
	struct obio4_attach_args *oba = &uoba->uoba_oba4;
	struct lsi64854_softc *sc = (void *)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) {
		printf("dmaattach_obio: cannot map registers\n");
		return;
	}

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