FreeBSD/Linux Kernel Cross Reference
sys/dev/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 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD: releng/7.3/sys/dev/fb/splash.c 129879 2004-05-30 20:08:47Z phk $");
30
31 #include "opt_splash.h"
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/linker.h>
37 #include <sys/fbio.h>
38 #include <sys/kernel.h>
39 #include <sys/module.h>
40
41 #include <dev/fb/fbreg.h>
42 #include <dev/fb/splashreg.h>
43
44 MODULE_VERSION(splash, 1);
45
46 /* video adapter and image decoder */
47 static video_adapter_t *splash_adp;
48 static splash_decoder_t *splash_decoder;
49
50 /* decoder candidates */
51 static int decoders;
52 static splash_decoder_t **decoder_set;
53 #define DECODER_ARRAY_DELTA 4
54
55 /* console driver callback */
56 static int (*splash_callback)(int, void *);
57 static void *splash_arg;
58
59 static int
60 splash_find_data(splash_decoder_t *decoder)
61 {
62 caddr_t image_module;
63 caddr_t p;
64
65 if (decoder->data_type == NULL)
66 return 0;
67 image_module = preload_search_by_type(decoder->data_type);
68 if (image_module == NULL)
69 return ENOENT;
70 p = preload_search_info(image_module, MODINFO_ADDR);
71 if (p == NULL)
72 return ENOENT;
73 decoder->data = *(void **)p;
74 p = preload_search_info(image_module, MODINFO_SIZE);
75 if (p == NULL)
76 return ENOENT;
77 decoder->data_size = *(size_t *)p;
78 if (bootverbose)
79 printf("splash: image@%p, size:%lu\n",
80 (void *)decoder->data, (long)decoder->data_size);
81 return 0;
82 }
83
84 static int
85 splash_test(splash_decoder_t *decoder)
86 {
87 if (splash_find_data(decoder))
88 return ENOENT; /* XXX */
89 if (*decoder->init && (*decoder->init)(splash_adp)) {
90 decoder->data = NULL;
91 decoder->data_size = 0;
92 return ENODEV; /* XXX */
93 }
94 if (bootverbose)
95 printf("splash: image decoder found: %s\n", decoder->name);
96 return 0;
97 }
98
99 static void
100 splash_new(splash_decoder_t *decoder)
101 {
102 splash_decoder = decoder;
103 if (splash_callback != NULL)
104 (*splash_callback)(SPLASH_INIT, splash_arg);
105 }
106
107 int
108 splash_register(splash_decoder_t *decoder)
109 {
110 splash_decoder_t **p;
111 int error;
112 int i;
113
114 if (splash_adp != NULL) {
115 /*
116 * If the video card has aleady been initialized, test
117 * this decoder immediately.
118 */
119 error = splash_test(decoder);
120 if (error == 0) {
121 /* replace the current decoder with new one */
122 if (splash_decoder != NULL)
123 error = splash_term(splash_adp);
124 if (error == 0)
125 splash_new(decoder);
126 }
127 return error;
128 } else {
129 /* register the decoder for later use */
130 for (i = 0; i < decoders; ++i) {
131 if (decoder_set[i] == NULL)
132 break;
133 }
134 if ((i >= decoders) && (decoders % DECODER_ARRAY_DELTA) == 0) {
135 p = malloc(sizeof(*p)*(decoders + DECODER_ARRAY_DELTA),
136 M_DEVBUF, M_NOWAIT);
137 if (p == NULL)
138 return ENOMEM;
139 if (decoder_set != NULL) {
140 bcopy(decoder_set, p, sizeof(*p)*decoders);
141 free(decoder_set, M_DEVBUF);
142 }
143 decoder_set = p;
144 i = decoders++;
145 }
146 decoder_set[i] = decoder;
147 }
148
149 return 0;
150 }
151
152 int
153 splash_unregister(splash_decoder_t *decoder)
154 {
155 int error;
156
157 if (splash_decoder == decoder) {
158 if ((error = splash_term(splash_adp)) != 0)
159 return error;
160 }
161 return 0;
162 }
163
164 int
165 splash_init(video_adapter_t *adp, int (*callback)(int, void *), void *arg)
166 {
167 int i;
168
169 splash_adp = adp;
170 splash_callback = callback;
171 splash_arg = arg;
172
173 splash_decoder = NULL;
174 for (i = 0; i < decoders; ++i) {
175 if (decoder_set[i] == NULL)
176 continue;
177 if (splash_test(decoder_set[i]) == 0) {
178 splash_new(decoder_set[i]);
179 break;
180 }
181 decoder_set[i] = NULL;
182 }
183 for (++i; i < decoders; ++i) {
184 decoder_set[i] = NULL;
185 }
186 return 0;
187 }
188
189 int
190 splash_term(video_adapter_t *adp)
191 {
192 int error = 0;
193
194 if (splash_adp != adp)
195 return EINVAL;
196 if (splash_decoder != NULL) {
197 if (splash_callback != NULL)
198 error = (*splash_callback)(SPLASH_TERM, splash_arg);
199 if (error == 0 && splash_decoder->term)
200 error = (*splash_decoder->term)(adp);
201 if (error == 0)
202 splash_decoder = NULL;
203 }
204 return error;
205 }
206
207 int
208 splash(video_adapter_t *adp, int on)
209 {
210 if (splash_decoder != NULL)
211 return (*splash_decoder->splash)(adp, on);
212 return ENODEV;
213 }
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