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  * $DragonFly: src/sys/dev/video/fb/splash.c,v 1.6 2006/12/22 23:26:27 swildner Exp $
  28  */
  29
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/kernel.h>
  33 #include <sys/malloc.h>
  34 #include <sys/linker.h>
  35 #include <sys/fbio.h>
  36
  37 #include "fbreg.h"
  38 #include "splashreg.h"
  39
  40 /* video adapter and image decoder */
  41 static video_adapter_t  *splash_adp;
  42 static splash_decoder_t *splash_decoder;
  43
  44 /* decoder candidates */
  45 static int              decoders;
  46 static splash_decoder_t **decoder_set;
  47 #define DECODER_ARRAY_DELTA 4
  48
  49 /* console driver callback */
  50 static int              (*splash_callback)(int, void *);
  51 static void             *splash_arg;
  52
  53 static int
  54 splash_find_data(splash_decoder_t *decoder)
  55 {
  56         caddr_t image_module;
  57         caddr_t p;
  58
  59         if (decoder->data_type == NULL)
  60                 return 0;
  61         image_module = preload_search_by_type(decoder->data_type);
  62         if (image_module == NULL)
  63                 return ENOENT;
  64         p = preload_search_info(image_module, MODINFO_ADDR);
  65         if (p == NULL)
  66                 return ENOENT;
  67         decoder->data = *(void **)p;
  68         p = preload_search_info(image_module, MODINFO_SIZE);
  69         if (p == NULL)
  70                 return ENOENT;
  71         decoder->data_size = *(size_t *)p;
  72         if (bootverbose)
  73                 kprintf("splash: image@%p, size:%lu\n",
  74                        (void *)decoder->data, (long)decoder->data_size);
  75         return 0;
  76 }
  77
  78 static int
  79 splash_test(splash_decoder_t *decoder)
  80 {
  81         if (splash_find_data(decoder))
  82                 return ENOENT;  /* XXX */
  83         if (*decoder->init && (*decoder->init)(splash_adp)) {
  84                 decoder->data = NULL;
  85                 decoder->data_size = 0;
  86                 return ENODEV;  /* XXX */
  87         }
  88         if (bootverbose)
  89                 kprintf("splash: image decoder found: %s\n", decoder->name);
  90         return 0;
  91 }
  92
  93 static void
  94 splash_new(splash_decoder_t *decoder)
  95 {
  96         splash_decoder = decoder;
  97         if (splash_callback != NULL)
  98                 (*splash_callback)(SPLASH_INIT, splash_arg);
  99 }
 100
 101 int
 102 splash_register(splash_decoder_t *decoder)
 103 {
 104         splash_decoder_t **p;
 105         int error;
 106         int i;
 107
 108         if (splash_adp != NULL) {
 109                 /*
 110                  * If the video card has aleady been initialized, test
 111                  * this decoder immediately.
 112                  */
 113                 error = splash_test(decoder);
 114                 if (error == 0) {
 115                         /* replace the current decoder with new one */
 116                         if (splash_decoder != NULL)
 117                                 error = splash_term(splash_adp);
 118                         if (error == 0)
 119                                 splash_new(decoder);
 120                 }
 121                 return error;
 122         } else {
 123                 /* register the decoder for later use */
 124                 for (i = 0; i < decoders; ++i) {
 125                         if (decoder_set[i] == NULL)
 126                                 break;
 127                 }
 128                 if ((i >= decoders) && (decoders % DECODER_ARRAY_DELTA) == 0) {
 129                         p = kmalloc(sizeof(*p)*(decoders + DECODER_ARRAY_DELTA),
 130                                 M_DEVBUF, M_NOWAIT);
 131                         if (p == NULL)
 132                                 return ENOMEM;
 133                         if (decoder_set != NULL) {
 134                                 bcopy(decoder_set, p, sizeof(*p)*decoders);
 135                                 kfree(decoder_set, M_DEVBUF);
 136                         }
 137                         decoder_set = p;
 138                         i = decoders++;
 139                 }
 140                 decoder_set[i] = decoder;
 141         }
 142
 143         return 0;
 144 }
 145
 146 int
 147 splash_unregister(splash_decoder_t *decoder)
 148 {
 149         int error;
 150
 151         if (splash_decoder == decoder) {
 152                 if ((error = splash_term(splash_adp)) != 0)
 153                         return error;
 154         }
 155         return 0;
 156 }
 157
 158 int
 159 splash_init(video_adapter_t *adp, int (*callback)(int, void *), void *arg)
 160 {
 161         int i;
 162
 163         splash_adp = adp;
 164         splash_callback = callback;
 165         splash_arg = arg;
 166
 167         splash_decoder = NULL;
 168         for (i = 0; i < decoders; ++i) {
 169                 if (decoder_set[i] == NULL)
 170                         continue;
 171                 if (splash_test(decoder_set[i]) == 0) {
 172                         splash_new(decoder_set[i]);
 173                         break;
 174                 }
 175                 decoder_set[i] = NULL;
 176         }
 177         for (++i; i < decoders; ++i) {
 178                 decoder_set[i] = NULL;
 179         }
 180         return 0;
 181 }
 182
 183 int
 184 splash_term(video_adapter_t *adp)
 185 {
 186         int error = 0;
 187
 188         if (splash_adp != adp)
 189                 return EINVAL;
 190         if (splash_decoder != NULL) {
 191                 if (splash_callback != NULL)
 192                         error = (*splash_callback)(SPLASH_TERM, splash_arg);
 193                 if (error == 0 && splash_decoder->term)
 194                         error = (*splash_decoder->term)(adp);
 195                 if (error == 0)
 196                         splash_decoder = NULL;
 197         }
 198         return error;
 199 }
 200
 201 int
 202 splash(video_adapter_t *adp, int on)
 203 {
 204         if (splash_decoder != NULL)
 205                 return (*splash_decoder->splash)(adp, on);
 206         return ENODEV;
 207 }