splash.c

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    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  * $FreeBSD$
   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 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/fb/splash.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/fb/splash.c