splash.c revision 50477 
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: head/sys/dev/fb/splash.c 50477 1999-08-28 01:08:13Z peter $
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#include <sys/fbio.h>
39
40#include <dev/fb/fbreg.h>
41#include <dev/fb/splashreg.h>
42
43/* video adapter and image decoder */
44static video_adapter_t	*splash_adp;
45static splash_decoder_t	*splash_decoder;
46
47/* decoder candidates */
48static int		decoders;
49static splash_decoder_t **decoder_set;
50#define DECODER_ARRAY_DELTA 4
51
52/* console driver callback */
53static int		(*splash_callback)(int, void *);
54static void		*splash_arg;
55
56static int
57splash_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:%lu\n",
77		       (void *)decoder->data, (long)decoder->data_size);
78	return 0;
79}
80
81static int
82splash_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
96static void
97splash_new(splash_decoder_t *decoder)
98{
99	splash_decoder = decoder;
100	if (splash_callback != NULL)
101		(*splash_callback)(SPLASH_INIT, splash_arg);
102}
103
104int
105splash_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
149int
150splash_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
161int
162splash_init(video_adapter_t *adp, int (*callback)(int, void *), void *arg)
163{
164	int i;
165
166	splash_adp = adp;
167	splash_callback = callback;
168	splash_arg = arg;
169
170	splash_decoder = NULL;
171	for (i = 0; i < decoders; ++i) {
172		if (decoder_set[i] == NULL)
173			continue;
174		if (splash_test(decoder_set[i]) == 0) {
175			splash_new(decoder_set[i]);
176			break;
177		}
178		decoder_set[i] = NULL;
179	}
180	for (++i; i < decoders; ++i) {
181		decoder_set[i] = NULL;
182	}
183	return 0;
184}
185
186int
187splash_term(video_adapter_t *adp)
188{
189	int error = 0;
190
191	if (splash_adp != adp)
192		return EINVAL;
193	if (splash_decoder != NULL) {
194		if (splash_callback != NULL)
195			error = (*splash_callback)(SPLASH_TERM, splash_arg);
196		if (error == 0)
197			error = (*splash_decoder->term)(adp);
198		if (error == 0)
199			splash_decoder = NULL;
200	}
201	return error;
202}
203
204int
205splash(video_adapter_t *adp, int on)
206{
207	if (splash_decoder != NULL)
208		return (*splash_decoder->splash)(adp, on);
209	return ENODEV;
210}
211
212#endif /* NSPLASH > 0 */
213