sys/arch/arm/iomd/vidc20.c

   1 /*      $NetBSD: vidc20.c,v 1.14 2006/03/08 23:46:23 lukem Exp $        */
   2
   3 /*
   4  * Copyright (c) 1997 Mark Brinicombe
   5  * Copyright (c) 1997 Causality Limited
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by Mark Brinicombe
  19  * 4. The name of the company nor the name of the author may be used to
  20  *    endorse or promote products derived from this software without specific
  21  *    prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  24  * OR IMPLIED  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  25  * WARRANTIES OF  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE
  27  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  33  * THE POSSIBILITY OF SUCH DAMAGE.
  34  *
  35  * RiscBSD kernel project
  36  *
  37  * vidc20.c
  38  *
  39  * VIDC20 driver
  40  *
  41  * Created      : 22/02/97
  42  */
  43
  44 #include <sys/cdefs.h>
  45 __KERNEL_RCSID(0, "$NetBSD: vidc20.c,v 1.14 2006/03/08 23:46:23 lukem Exp $");
  46
  47 #include <sys/types.h>
  48 #include <sys/param.h>
  49 #include <sys/systm.h>
  50 #include <sys/device.h>
  51
  52 #include <machine/bus.h>
  53 #include <arm/iomd/vidc.h>
  54 #include <machine/io.h>
  55 #include <arm/iomd/iomdreg.h>
  56 #include <arm/iomd/iomdvar.h>
  57 #include <arm/mainbus/mainbus.h>
  58
  59 #include "locators.h"
  60
  61 struct vidc20_softc {
  62         struct device   sc_dev;
  63         bus_space_tag_t sc_iot;
  64 };
  65
  66 static int  vidcmatch(struct device *, struct cfdata *, void *);
  67 static void vidcattach(struct device *, struct device *, void *);
  68 static int  vidcsearch(struct device *, struct cfdata *,
  69                        const int *, void *);
  70
  71 /*
  72  * vidc_base gives the base of the VIDC chip in memory; this is for
  73  * the rest isnt busspaceified yet. Initialised with VIDC_BASE for
  74  * backwards compatibility.
  75  */
  76 int *vidc_base = (int *)VIDC_BASE;
  77
  78
  79 /*
  80  * vidc_fref is the reference frequency in MHz of the detected VIDC
  81  * (dependent on IOMD/IOC)
  82  * XXX default is RPC600 ?
  83  */
  84 int  vidc_fref = 24000000;
  85
  86
  87 CFATTACH_DECL(vidc, sizeof (struct vidc20_softc),
  88     vidcmatch, vidcattach, NULL, NULL);
  89
  90 /*
  91  * vidcmatch()
  92  *
  93  * VIDC20 is a write only device so we cannot probe it
  94  * We must assume things are ok.
  95  */
  96 static int
  97 vidcmatch(struct device *parent, struct cfdata *cf, void *aux)
  98 {
  99
 100         return 1;
 101 }
 102
 103 /*
 104  * vidcsearch()
 105  *
 106  * search routine used during the config of children
 107  */
 108
 109 static int
 110 vidcsearch(struct device *parent, struct cfdata *cf,
 111            const int *ldesc, void *aux)
 112 {
 113
 114         if (config_match(parent, cf, NULL) > 0)
 115                 config_attach(parent, cf, NULL, NULL);
 116
 117         return 0;
 118 }
 119
 120 /*
 121  * vidcattach()
 122  *
 123  * Configure all the child devices of the VIDC
 124  */
 125 static void
 126 vidcattach(struct device *parent, struct device *self, void *aux)
 127 {
 128         struct vidc20_softc *sc = (struct vidc20_softc *)self;
 129         struct mainbus_attach_args *mb = aux;
 130
 131         sc->sc_iot = mb->mb_iot;
 132
 133         /*
 134          * Since the VIDC is write-only, infer the type of VIDC from the
 135          * type of IOMD.
 136          */
 137         switch (IOMD_ID) {
 138         case ARM7500_IOC_ID:
 139                 printf(": ARM7500 video and sound macrocell\n");
 140                 vidc_fref = 32000000;
 141                 break;
 142         case ARM7500FE_IOC_ID:
 143                 printf(": ARM7500FE video and sound macrocell\n");
 144                 vidc_fref = 32000000;
 145                 break;
 146         default:                                /* XXX default? */
 147         case RPC600_IOMD_ID:
 148                 printf(": VIDC20\n");
 149                 vidc_fref = 24000000;
 150                 break;
 151         }
 152
 153         config_search_ia(vidcsearch, self, "vidc", NULL);
 154 }
 155
 156 /* End of vidc20.c */