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dma_obio.c revision 1.6 
      1 /*	$NetBSD: dma_obio.c,v 1.6 2002/10/01 18:57:51 thorpej 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 CFATTACH_DECL(dma_obio, sizeof(struct lsi64854_softc),
     60     dmamatch_obio, dmaattach_obio, NULL, NULL)
     61 
     62 int
     63 dmamatch_obio(parent, cf, aux)
     64 	struct device *parent;
     65 	struct cfdata *cf;
     66 	void *aux;
     67 {
     68 	union obio_attach_args *uoba = aux;
     69 	struct obio4_attach_args *oba;
     70 
     71 	if (uoba->uoba_isobio4 == 0)
     72 		return (0);
     73 
     74 	oba = &uoba->uoba_oba4;
     75 	return (bus_space_probe(oba->oba_bustag, oba->oba_paddr,
     76 				4,	/* probe size */
     77 				0,	/* offset */
     78 				0,	/* flags */
     79 				NULL, NULL));
     80 }
     81 
     82 
     83 void
     84 dmaattach_obio(parent, self, aux)
     85 	struct device *parent, *self;
     86 	void *aux;
     87 {
     88 	union obio_attach_args *uoba = aux;
     89 	struct obio4_attach_args *oba = &uoba->uoba_oba4;
     90 	struct lsi64854_softc *sc = (void *)self;
     91 
     92 	sc->sc_bustag = oba->oba_bustag;
     93 	sc->sc_dmatag = oba->oba_dmatag;
     94 
     95 	if (bus_space_map(oba->oba_bustag, oba->oba_paddr,
     96 			  4 * sizeof(u_int32_t),
     97 			  0, &sc->sc_regs) != 0) {
     98 		printf("dmaattach_obio: cannot map registers\n");
     99 		return;
    100 	}
    101 
    102 	/* Any point in setting `sc_burst' to anything here? */
    103 	sc->sc_channel = L64854_CHANNEL_SCSI;
    104 	lsi64854_attach(sc);
    105 }
    106