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dma_obio.c revision 1.3 
      1 /*	$NetBSD: dma_obio.c,v 1.3 1999/04/12 23:01:00 pk Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Paul Kranenburg.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/types.h>
     40 #include <sys/param.h>
     41 #include <sys/systm.h>
     42 #include <sys/kernel.h>
     43 #include <sys/errno.h>
     44 #include <sys/device.h>
     45 #include <sys/malloc.h>
     46 
     47 #include <machine/bus.h>
     48 #include <machine/autoconf.h>
     49 #include <machine/cpu.h>
     50 
     51 #include <dev/sbus/sbusvar.h>
     52 
     53 #include <dev/ic/lsi64854reg.h>
     54 #include <dev/ic/lsi64854var.h>
     55 
     56 int	dmamatch_obio	__P((struct device *, struct cfdata *, void *));
     57 void	dmaattach_obio	__P((struct device *, struct device *, void *));
     58 
     59 struct cfattach dma_obio_ca = {
     60 	sizeof(struct lsi64854_softc), dmamatch_obio, dmaattach_obio
     61 };
     62 
     63 int
     64 dmamatch_obio(parent, cf, aux)
     65 	struct device *parent;
     66 	struct cfdata *cf;
     67 	void *aux;
     68 {
     69 	union obio_attach_args *uoba = aux;
     70 	struct obio4_attach_args *oba;
     71 
     72 	if (uoba->uoba_isobio4 == 0)
     73 		return (0);
     74 
     75 	oba = &uoba->uoba_oba4;
     76 	return (bus_space_probe(oba->oba_bustag, 0, oba->oba_paddr,
     77 				4,	/* probe size */
     78 				0,	/* offset */
     79 				0,	/* flags */
     80 				NULL, NULL));
     81 }
     82 
     83 
     84 void
     85 dmaattach_obio(parent, self, aux)
     86 	struct device *parent, *self;
     87 	void *aux;
     88 {
     89 	union obio_attach_args *uoba = aux;
     90 	struct obio4_attach_args *oba = &uoba->uoba_oba4;
     91 	struct lsi64854_softc *sc = (void *)self;
     92 
     93 	sc->sc_bustag = oba->oba_bustag;
     94 	sc->sc_dmatag = oba->oba_dmatag;
     95 
     96 	if (obio_bus_map(oba->oba_bustag, oba->oba_paddr,
     97 			 0, 4 * sizeof(u_int32_t),
     98 			 0, 0,
     99 			 &sc->sc_regs) != 0) {
    100 		printf("dmaattach_obio: cannot map registers\n");
    101 		return;
    102 	}
    103 
    104 	/* Any point in setting `sc_burst' to anything here? */
    105 	sc->sc_channel = L64854_CHANNEL_SCSI;
    106 	lsi64854_attach(sc);
    107 }
    108