splash.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer as
   12  *    the first lines of this file unmodified.
   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  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD$");
   32 
   33 #include "opt_splash.h"
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/malloc.h>
   38 #include <sys/linker.h>
   39 #include <sys/fbio.h>
   40 #include <sys/kernel.h>
   41 #include <sys/module.h>
   42 
   43 #include <dev/fb/fbreg.h>
   44 #include <dev/fb/splashreg.h>
   45 
   46 MODULE_VERSION(splash, 1);
   47 
   48 /* video adapter and image decoder */
   49 static video_adapter_t  *splash_adp;
   50 static splash_decoder_t *splash_decoder;
   51 
   52 /* decoder candidates */
   53 static int              decoders;
   54 static splash_decoder_t **decoder_set;
   55 #define DECODER_ARRAY_DELTA 4
   56 
   57 /* console driver callback */
   58 static int              (*splash_callback)(int, void *);
   59 static void             *splash_arg;
   60 
   61 static int
   62 splash_find_data(splash_decoder_t *decoder)
   63 {
   64         caddr_t image_module;
   65         void *ptr;
   66         size_t sz;
   67 
   68         if (decoder->data_type == NULL)
   69                 return (0);
   70 
   71         image_module = preload_search_by_type(decoder->data_type);
   72         if (image_module == NULL)
   73                 return (ENOENT);
   74 
   75         ptr = preload_fetch_addr(image_module);
   76         sz = preload_fetch_size(image_module);
   77         if (ptr == NULL || sz == 0)
   78                 return (ENOENT);
   79 
   80         if (bootverbose)
   81                 printf("splash: image@%p, size:%zu\n", ptr, sz);
   82 
   83         decoder->data = ptr;
   84         decoder->data_size = sz;
   85         return (0);
   86 }
   87 
   88 static int
   89 splash_test(splash_decoder_t *decoder)
   90 {
   91         if (splash_find_data(decoder))
   92                 return ENOENT;  /* XXX */
   93         if (*decoder->init && (*decoder->init)(splash_adp)) {
   94                 decoder->data = NULL;
   95                 decoder->data_size = 0;
   96                 return ENODEV;  /* XXX */
   97         }
   98         if (bootverbose)
   99                 printf("splash: image decoder found: %s\n", decoder->name);
  100         return 0;
  101 }
  102 
  103 static void
  104 splash_new(splash_decoder_t *decoder)
  105 {
  106         splash_decoder = decoder;
  107         if (splash_callback != NULL)
  108                 (*splash_callback)(SPLASH_INIT, splash_arg);
  109 }
  110 
  111 int
  112 splash_register(splash_decoder_t *decoder)
  113 {
  114         splash_decoder_t **p;
  115         int error;
  116         int i;
  117 
  118         if (splash_adp != NULL) {
  119                 /*
  120                  * If the video card has already been initialized, test
  121                  * this decoder immediately.
  122                  */
  123                 error = splash_test(decoder);
  124                 if (error == 0) {
  125                         /* replace the current decoder with new one */
  126                         if (splash_decoder != NULL)
  127                                 error = splash_term(splash_adp);
  128                         if (error == 0)
  129                                 splash_new(decoder);
  130                 }
  131                 return error;
  132         } else {
  133                 /* register the decoder for later use */
  134                 for (i = 0; i < decoders; ++i) {
  135                         if (decoder_set[i] == NULL)
  136                                 break;
  137                 }
  138                 if ((i >= decoders) && (decoders % DECODER_ARRAY_DELTA) == 0) {
  139                         p = malloc(sizeof(*p)*(decoders + DECODER_ARRAY_DELTA),
  140                                 M_DEVBUF, M_NOWAIT);
  141                         if (p == NULL)
  142                                 return ENOMEM;
  143                         if (decoder_set != NULL) {
  144                                 bcopy(decoder_set, p, sizeof(*p)*decoders);
  145                                 free(decoder_set, M_DEVBUF);
  146                         }
  147                         decoder_set = p;
  148                         i = decoders++;
  149                 }
  150                 decoder_set[i] = decoder;
  151         }
  152 
  153         return 0;
  154 }
  155 
  156 int
  157 splash_unregister(splash_decoder_t *decoder)
  158 {
  159         int error;
  160 
  161         if (splash_decoder == decoder) {
  162                 if ((error = splash_term(splash_adp)) != 0)
  163                         return error;
  164         }
  165         return 0;
  166 }
  167 
  168 int
  169 splash_init(video_adapter_t *adp, int (*callback)(int, void *), void *arg)
  170 {
  171         int i;
  172 
  173         splash_adp = adp;
  174         splash_callback = callback;
  175         splash_arg = arg;
  176 
  177         splash_decoder = NULL;
  178         for (i = 0; i < decoders; ++i) {
  179                 if (decoder_set[i] == NULL)
  180                         continue;
  181                 if (splash_test(decoder_set[i]) == 0) {
  182                         splash_new(decoder_set[i]);
  183                         break;
  184                 }
  185                 decoder_set[i] = NULL;
  186         }
  187         for (++i; i < decoders; ++i) {
  188                 decoder_set[i] = NULL;
  189         }
  190         return 0;
  191 }
  192 
  193 int
  194 splash_term(video_adapter_t *adp)
  195 {
  196         int error = 0;
  197 
  198         if (splash_adp != adp)
  199                 return EINVAL;
  200         if (splash_decoder != NULL) {
  201                 if (splash_callback != NULL)
  202                         error = (*splash_callback)(SPLASH_TERM, splash_arg);
  203                 if (error == 0 && splash_decoder->term)
  204                         error = (*splash_decoder->term)(adp);
  205                 if (error == 0)
  206                         splash_decoder = NULL;
  207         }
  208         return error;
  209 }
  210 
  211 int
  212 splash(video_adapter_t *adp, int on)
  213 {
  214         if (splash_decoder != NULL)
  215                 return (*splash_decoder->splash)(adp, on);
  216         return ENODEV;
  217 }

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

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