xref: /freebsd/sys/dev/fb/splash.c (revision 3fc36ee018bb836bd1796067cf4ef8683f166ebc)
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("$FreeBSD$");
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 	void *ptr;
64 	size_t sz;
65 
66 	if (decoder->data_type == NULL)
67 		return (0);
68 
69 	image_module = preload_search_by_type(decoder->data_type);
70 	if (image_module == NULL)
71 		return (ENOENT);
72 
73 	ptr = preload_fetch_addr(image_module);
74 	sz = preload_fetch_size(image_module);
75 	if (ptr == NULL || sz == 0)
76 		return (ENOENT);
77 
78 	if (bootverbose)
79 		printf("splash: image@%p, size:%zu\n", ptr, sz);
80 
81 	decoder->data = ptr;
82 	decoder->data_size = sz;
83 	return (0);
84 }
85 
86 static int
87 splash_test(splash_decoder_t *decoder)
88 {
89 	if (splash_find_data(decoder))
90 		return ENOENT;	/* XXX */
91 	if (*decoder->init && (*decoder->init)(splash_adp)) {
92 		decoder->data = NULL;
93 		decoder->data_size = 0;
94 		return ENODEV;	/* XXX */
95 	}
96 	if (bootverbose)
97 		printf("splash: image decoder found: %s\n", decoder->name);
98 	return 0;
99 }
100 
101 static void
102 splash_new(splash_decoder_t *decoder)
103 {
104 	splash_decoder = decoder;
105 	if (splash_callback != NULL)
106 		(*splash_callback)(SPLASH_INIT, splash_arg);
107 }
108 
109 int
110 splash_register(splash_decoder_t *decoder)
111 {
112 	splash_decoder_t **p;
113 	int error;
114 	int i;
115 
116 	if (splash_adp != NULL) {
117 		/*
118 		 * If the video card has already been initialized, test
119 		 * this decoder immediately.
120 		 */
121 		error = splash_test(decoder);
122 		if (error == 0) {
123 			/* replace the current decoder with new one */
124 			if (splash_decoder != NULL)
125 				error = splash_term(splash_adp);
126 			if (error == 0)
127 				splash_new(decoder);
128 		}
129 		return error;
130 	} else {
131 		/* register the decoder for later use */
132 		for (i = 0; i < decoders; ++i) {
133 			if (decoder_set[i] == NULL)
134 				break;
135 		}
136 		if ((i >= decoders) && (decoders % DECODER_ARRAY_DELTA) == 0) {
137 			p = malloc(sizeof(*p)*(decoders + DECODER_ARRAY_DELTA),
138 			   	M_DEVBUF, M_NOWAIT);
139 			if (p == NULL)
140 				return ENOMEM;
141 			if (decoder_set != NULL) {
142 				bcopy(decoder_set, p, sizeof(*p)*decoders);
143 				free(decoder_set, M_DEVBUF);
144 			}
145 			decoder_set = p;
146 			i = decoders++;
147 		}
148 		decoder_set[i] = decoder;
149 	}
150 
151 	return 0;
152 }
153 
154 int
155 splash_unregister(splash_decoder_t *decoder)
156 {
157 	int error;
158 
159 	if (splash_decoder == decoder) {
160 		if ((error = splash_term(splash_adp)) != 0)
161 			return error;
162 	}
163 	return 0;
164 }
165 
166 int
167 splash_init(video_adapter_t *adp, int (*callback)(int, void *), void *arg)
168 {
169 	int i;
170 
171 	splash_adp = adp;
172 	splash_callback = callback;
173 	splash_arg = arg;
174 
175 	splash_decoder = NULL;
176 	for (i = 0; i < decoders; ++i) {
177 		if (decoder_set[i] == NULL)
178 			continue;
179 		if (splash_test(decoder_set[i]) == 0) {
180 			splash_new(decoder_set[i]);
181 			break;
182 		}
183 		decoder_set[i] = NULL;
184 	}
185 	for (++i; i < decoders; ++i) {
186 		decoder_set[i] = NULL;
187 	}
188 	return 0;
189 }
190 
191 int
192 splash_term(video_adapter_t *adp)
193 {
194 	int error = 0;
195 
196 	if (splash_adp != adp)
197 		return EINVAL;
198 	if (splash_decoder != NULL) {
199 		if (splash_callback != NULL)
200 			error = (*splash_callback)(SPLASH_TERM, splash_arg);
201 		if (error == 0 && splash_decoder->term)
202 			error = (*splash_decoder->term)(adp);
203 		if (error == 0)
204 			splash_decoder = NULL;
205 	}
206 	return error;
207 }
208 
209 int
210 splash(video_adapter_t *adp, int on)
211 {
212 	if (splash_decoder != NULL)
213 		return (*splash_decoder->splash)(adp, on);
214 	return ENODEV;
215 }
216