sys/arch/sparc/dev/dma_obio.c

   1 /*      $NetBSD: dma_obio.c,v 1.10 2008/04/13 04:55:53 tsutsui 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  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: dma_obio.c,v 1.10 2008/04/13 04:55:53 tsutsui Exp $");
  34
  35 #include <sys/types.h>
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/kernel.h>
  39 #include <sys/errno.h>
  40 #include <sys/device.h>
  41 #include <sys/malloc.h>
  42
  43 #include <machine/bus.h>
  44 #include <machine/autoconf.h>
  45 #include <machine/cpu.h>
  46
  47 #include <dev/sbus/sbusvar.h>
  48
  49 #include <dev/ic/lsi64854reg.h>
  50 #include <dev/ic/lsi64854var.h>
  51
  52 int     dmamatch_obio(device_t, cfdata_t, void *);
  53 void    dmaattach_obio(device_t, device_t, void *);
  54
  55 CFATTACH_DECL_NEW(dma_obio, sizeof(struct lsi64854_softc),
  56     dmamatch_obio, dmaattach_obio, NULL, NULL);
  57
  58 int
  59 dmamatch_obio(device_t parent, cfdata_t cf, void *aux)
  60 {
  61         union obio_attach_args *uoba = aux;
  62         struct obio4_attach_args *oba;
  63
  64         if (uoba->uoba_isobio4 == 0)
  65                 return 0;
  66
  67         oba = &uoba->uoba_oba4;
  68         return bus_space_probe(oba->oba_bustag, oba->oba_paddr,
  69                                 4,      /* probe size */
  70                                 0,      /* offset */
  71                                 0,      /* flags */
  72                                 NULL, NULL);
  73 }
  74
  75
  76 void
  77 dmaattach_obio(device_t parent, device_t self, void *aux)
  78 {
  79         struct lsi64854_softc *sc = device_private(self);
  80         union obio_attach_args *uoba = aux;
  81         struct obio4_attach_args *oba = &uoba->uoba_oba4;
  82
  83         sc->sc_dev = self;
  84         sc->sc_bustag = oba->oba_bustag;
  85         sc->sc_dmatag = oba->oba_dmatag;
  86
  87         if (bus_space_map(oba->oba_bustag, oba->oba_paddr,
  88                           4 * sizeof(uint32_t),
  89                           0, &sc->sc_regs) != 0) {
  90                 aprint_error(": cannot map registers\n");
  91                 return;
  92         }
  93
  94         /* Any point in setting `sc_burst' to anything here? */
  95         sc->sc_channel = L64854_CHANNEL_SCSI;
  96         lsi64854_attach(sc);
  97 }