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