/*      $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);
}