sys/dev/video/fb/splash.c

   1 /*-
   2  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer as
  10  *    the first lines of this file unmodified.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sys/dev/fb/splash.c,v 1.8 2000/01/29 14:42:57 peter Exp $
  27  */
  28
  29 #include <sys/param.h>
  30 #include <sys/systm.h>
  31 #include <sys/kernel.h>
  32 #include <sys/malloc.h>
  33 #include <sys/linker.h>
  34 #include <sys/fbio.h>
  35
  36 #include <dev/fb/fbreg.h>
  37 #include <dev/fb/splashreg.h>
  38
  39 /* video adapter and image decoder */
  40 static video_adapter_t  *splash_adp;
  41 static splash_decoder_t *splash_decoder;
  42
  43 /* decoder candidates */
  44 static int              decoders;
  45 static splash_decoder_t **decoder_set;
  46 #define DECODER_ARRAY_DELTA 4
  47
  48 /* console driver callback */
  49 static int              (*splash_callback)(int, void *);
  50 static void             *splash_arg;
  51
  52 static int
  53 splash_find_data(splash_decoder_t *decoder)
  54 {
  55         caddr_t image_module;
  56         caddr_t p;
  57
  58         if (decoder->data_type == NULL)
  59                 return 0;
  60         image_module = preload_search_by_type(decoder->data_type);
  61         if (image_module == NULL)
  62                 return ENOENT;
  63         p = preload_search_info(image_module, MODINFO_ADDR);
  64         if (p == NULL)
  65                 return ENOENT;
  66         decoder->data = *(void **)p;
  67         p = preload_search_info(image_module, MODINFO_SIZE);
  68         if (p == NULL)
  69                 return ENOENT;
  70         decoder->data_size = *(size_t *)p;
  71         if (bootverbose)
  72                 printf("splash: image@%p, size:%lu\n",
  73                        (void *)decoder->data, (long)decoder->data_size);
  74         return 0;
  75 }
  76
  77 static int
  78 splash_test(splash_decoder_t *decoder)
  79 {
  80         if (splash_find_data(decoder))
  81                 return ENOENT;  /* XXX */
  82         if (*decoder->init && (*decoder->init)(splash_adp)) {
  83                 decoder->data = NULL;
  84                 decoder->data_size = 0;
  85                 return ENODEV;  /* XXX */
  86         }
  87         if (bootverbose)
  88                 printf("splash: image decoder found: %s\n", decoder->name);
  89         return 0;
  90 }
  91
  92 static void
  93 splash_new(splash_decoder_t *decoder)
  94 {
  95         splash_decoder = decoder;
  96         if (splash_callback != NULL)
  97                 (*splash_callback)(SPLASH_INIT, splash_arg);
  98 }
  99
 100 int
 101 splash_register(splash_decoder_t *decoder)
 102 {
 103         splash_decoder_t **p;
 104         int error;
 105         int i;
 106
 107         if (splash_adp != NULL) {
 108                 /*
 109                  * If the video card has aleady been initialized, test
 110                  * this decoder immediately.
 111                  */
 112                 error = splash_test(decoder);
 113                 if (error == 0) {
 114                         /* replace the current decoder with new one */
 115                         if (splash_decoder != NULL)
 116                                 error = splash_term(splash_adp);
 117                         if (error == 0)
 118                                 splash_new(decoder);
 119                 }
 120                 return error;
 121         } else {
 122                 /* register the decoder for later use */
 123                 for (i = 0; i < decoders; ++i) {
 124                         if (decoder_set[i] == NULL)
 125                                 break;
 126                 }
 127                 if ((i >= decoders) && (decoders % DECODER_ARRAY_DELTA) == 0) {
 128                         p = malloc(sizeof(*p)*(decoders + DECODER_ARRAY_DELTA),
 129                                 M_DEVBUF, M_NOWAIT);
 130                         if (p == NULL)
 131                                 return ENOMEM;
 132                         if (decoder_set != NULL) {
 133                                 bcopy(decoder_set, p, sizeof(*p)*decoders);
 134                                 free(decoder_set, M_DEVBUF);
 135                         }
 136                         decoder_set = p;
 137                         i = decoders++;
 138                 }
 139                 decoder_set[i] = decoder;
 140         }
 141
 142         return 0;
 143 }
 144
 145 int
 146 splash_unregister(splash_decoder_t *decoder)
 147 {
 148         int error;
 149
 150         if (splash_decoder == decoder) {
 151                 if ((error = splash_term(splash_adp)) != 0)
 152                         return error;
 153         }
 154         return 0;
 155 }
 156
 157 int
 158 splash_init(video_adapter_t *adp, int (*callback)(int, void *), void *arg)
 159 {
 160         int i;
 161
 162         splash_adp = adp;
 163         splash_callback = callback;
 164         splash_arg = arg;
 165
 166         splash_decoder = NULL;
 167         for (i = 0; i < decoders; ++i) {
 168                 if (decoder_set[i] == NULL)
 169                         continue;
 170                 if (splash_test(decoder_set[i]) == 0) {
 171                         splash_new(decoder_set[i]);
 172                         break;
 173                 }
 174                 decoder_set[i] = NULL;
 175         }
 176         for (++i; i < decoders; ++i) {
 177                 decoder_set[i] = NULL;
 178         }
 179         return 0;
 180 }
 181
 182 int
 183 splash_term(video_adapter_t *adp)
 184 {
 185         int error = 0;
 186
 187         if (splash_adp != adp)
 188                 return EINVAL;
 189         if (splash_decoder != NULL) {
 190                 if (splash_callback != NULL)
 191                         error = (*splash_callback)(SPLASH_TERM, splash_arg);
 192                 if (error == 0 && splash_decoder->term)
 193                         error = (*splash_decoder->term)(adp);
 194                 if (error == 0)
 195                         splash_decoder = NULL;
 196         }
 197         return error;
 198 }
 199
 200 int
 201 splash(video_adapter_t *adp, int on)
 202 {
 203         if (splash_decoder != NULL)
 204                 return (*splash_decoder->splash)(adp, on);
 205         return ENODEV;
 206 }