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1da177e4 LT |
1 | /* |
2 | * Advanced Linux Sound Architecture | |
3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
4 | * | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <sound/driver.h> | |
23 | ||
24 | #ifdef CONFIG_SND_OSSEMUL | |
25 | ||
26 | #if !defined(CONFIG_SOUND) && !(defined(MODULE) && defined(CONFIG_SOUND_MODULE)) | |
27 | #error "Enable the OSS soundcore multiplexer (CONFIG_SOUND) in the kernel." | |
28 | #endif | |
29 | ||
30 | #include <linux/init.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/time.h> | |
33 | #include <sound/core.h> | |
34 | #include <sound/minors.h> | |
35 | #include <sound/info.h> | |
36 | #include <linux/sound.h> | |
37 | ||
38 | #define SNDRV_OS_MINORS 256 | |
39 | ||
40 | static struct list_head snd_oss_minors_hash[SNDRV_CARDS]; | |
41 | ||
42 | static DECLARE_MUTEX(sound_oss_mutex); | |
43 | ||
44 | static snd_minor_t *snd_oss_minor_search(int minor) | |
45 | { | |
46 | struct list_head *list; | |
47 | snd_minor_t *mptr; | |
48 | ||
49 | list_for_each(list, &snd_oss_minors_hash[SNDRV_MINOR_OSS_CARD(minor)]) { | |
50 | mptr = list_entry(list, snd_minor_t, list); | |
51 | if (mptr->number == minor) | |
52 | return mptr; | |
53 | } | |
54 | return NULL; | |
55 | } | |
56 | ||
57 | static int snd_oss_kernel_minor(int type, snd_card_t * card, int dev) | |
58 | { | |
59 | int minor; | |
60 | ||
61 | switch (type) { | |
62 | case SNDRV_OSS_DEVICE_TYPE_MIXER: | |
63 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | |
64 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER)); | |
65 | break; | |
66 | case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: | |
67 | minor = SNDRV_MINOR_OSS_SEQUENCER; | |
68 | break; | |
69 | case SNDRV_OSS_DEVICE_TYPE_MUSIC: | |
70 | minor = SNDRV_MINOR_OSS_MUSIC; | |
71 | break; | |
72 | case SNDRV_OSS_DEVICE_TYPE_PCM: | |
73 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | |
74 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM)); | |
75 | break; | |
76 | case SNDRV_OSS_DEVICE_TYPE_MIDI: | |
77 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | |
78 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI)); | |
79 | break; | |
80 | case SNDRV_OSS_DEVICE_TYPE_DMFM: | |
81 | minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM); | |
82 | break; | |
83 | case SNDRV_OSS_DEVICE_TYPE_SNDSTAT: | |
84 | minor = SNDRV_MINOR_OSS_SNDSTAT; | |
85 | break; | |
86 | default: | |
87 | return -EINVAL; | |
88 | } | |
89 | snd_assert(minor >= 0 && minor < SNDRV_OS_MINORS, return -EINVAL); | |
90 | return minor; | |
91 | } | |
92 | ||
93 | int snd_register_oss_device(int type, snd_card_t * card, int dev, snd_minor_t * reg, const char *name) | |
94 | { | |
95 | int minor = snd_oss_kernel_minor(type, card, dev); | |
96 | int minor_unit; | |
97 | snd_minor_t *preg; | |
98 | int cidx = SNDRV_MINOR_OSS_CARD(minor); | |
99 | int track2 = -1; | |
100 | int register1 = -1, register2 = -1; | |
d568121c | 101 | struct device *carddev = NULL; |
1da177e4 LT |
102 | |
103 | if (minor < 0) | |
104 | return minor; | |
105 | preg = (snd_minor_t *)kmalloc(sizeof(snd_minor_t), GFP_KERNEL); | |
106 | if (preg == NULL) | |
107 | return -ENOMEM; | |
108 | *preg = *reg; | |
109 | preg->number = minor; | |
110 | preg->device = dev; | |
111 | down(&sound_oss_mutex); | |
112 | list_add_tail(&preg->list, &snd_oss_minors_hash[cidx]); | |
113 | minor_unit = SNDRV_MINOR_OSS_DEVICE(minor); | |
114 | switch (minor_unit) { | |
115 | case SNDRV_MINOR_OSS_PCM: | |
116 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); | |
117 | break; | |
118 | case SNDRV_MINOR_OSS_MIDI: | |
119 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); | |
120 | break; | |
121 | case SNDRV_MINOR_OSS_MIDI1: | |
122 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); | |
123 | break; | |
124 | } | |
d568121c TI |
125 | if (card) |
126 | carddev = card->dev; | |
127 | register1 = register_sound_special_device(reg->f_ops, minor, carddev); | |
1da177e4 LT |
128 | if (register1 != minor) |
129 | goto __end; | |
130 | if (track2 >= 0) { | |
d568121c | 131 | register2 = register_sound_special_device(reg->f_ops, track2, carddev); |
1da177e4 LT |
132 | if (register2 != track2) |
133 | goto __end; | |
134 | } | |
135 | up(&sound_oss_mutex); | |
136 | return 0; | |
137 | ||
138 | __end: | |
139 | if (register2 >= 0) | |
140 | unregister_sound_special(register2); | |
141 | if (register1 >= 0) | |
142 | unregister_sound_special(register1); | |
143 | list_del(&preg->list); | |
144 | up(&sound_oss_mutex); | |
145 | kfree(preg); | |
146 | return -EBUSY; | |
147 | } | |
148 | ||
149 | int snd_unregister_oss_device(int type, snd_card_t * card, int dev) | |
150 | { | |
151 | int minor = snd_oss_kernel_minor(type, card, dev); | |
152 | int cidx = SNDRV_MINOR_OSS_CARD(minor); | |
153 | int track2 = -1; | |
154 | snd_minor_t *mptr; | |
155 | ||
156 | if (minor < 0) | |
157 | return minor; | |
158 | down(&sound_oss_mutex); | |
159 | mptr = snd_oss_minor_search(minor); | |
160 | if (mptr == NULL) { | |
161 | up(&sound_oss_mutex); | |
162 | return -ENOENT; | |
163 | } | |
164 | unregister_sound_special(minor); | |
165 | switch (SNDRV_MINOR_OSS_DEVICE(minor)) { | |
166 | case SNDRV_MINOR_OSS_PCM: | |
167 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); | |
168 | break; | |
169 | case SNDRV_MINOR_OSS_MIDI: | |
170 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); | |
171 | break; | |
172 | case SNDRV_MINOR_OSS_MIDI1: | |
173 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); | |
174 | break; | |
175 | } | |
176 | if (track2 >= 0) | |
177 | unregister_sound_special(track2); | |
178 | list_del(&mptr->list); | |
179 | up(&sound_oss_mutex); | |
180 | kfree(mptr); | |
181 | return 0; | |
182 | } | |
183 | ||
184 | /* | |
185 | * INFO PART | |
186 | */ | |
187 | ||
188 | #ifdef CONFIG_PROC_FS | |
189 | ||
190 | static snd_info_entry_t *snd_minor_info_oss_entry = NULL; | |
191 | ||
192 | static void snd_minor_info_oss_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer) | |
193 | { | |
194 | int card, dev; | |
195 | struct list_head *list; | |
196 | snd_minor_t *mptr; | |
197 | ||
198 | down(&sound_oss_mutex); | |
199 | for (card = 0; card < SNDRV_CARDS; card++) { | |
200 | list_for_each(list, &snd_oss_minors_hash[card]) { | |
201 | mptr = list_entry(list, snd_minor_t, list); | |
202 | dev = SNDRV_MINOR_OSS_DEVICE(mptr->number); | |
203 | if (dev != SNDRV_MINOR_OSS_SNDSTAT && | |
204 | dev != SNDRV_MINOR_OSS_SEQUENCER && | |
205 | dev != SNDRV_MINOR_OSS_MUSIC) | |
206 | snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", mptr->number, card, dev, mptr->comment); | |
207 | else | |
208 | snd_iprintf(buffer, "%3i: : %s\n", mptr->number, mptr->comment); | |
209 | } | |
210 | } | |
211 | up(&sound_oss_mutex); | |
212 | } | |
213 | ||
214 | #endif /* CONFIG_PROC_FS */ | |
215 | ||
216 | int __init snd_minor_info_oss_init(void) | |
217 | { | |
218 | #ifdef CONFIG_PROC_FS | |
219 | snd_info_entry_t *entry; | |
220 | ||
221 | entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root); | |
222 | if (entry) { | |
223 | entry->c.text.read_size = PAGE_SIZE; | |
224 | entry->c.text.read = snd_minor_info_oss_read; | |
225 | if (snd_info_register(entry) < 0) { | |
226 | snd_info_free_entry(entry); | |
227 | entry = NULL; | |
228 | } | |
229 | } | |
230 | snd_minor_info_oss_entry = entry; | |
231 | #endif | |
232 | return 0; | |
233 | } | |
234 | ||
235 | int __exit snd_minor_info_oss_done(void) | |
236 | { | |
237 | #ifdef CONFIG_PROC_FS | |
238 | if (snd_minor_info_oss_entry) | |
239 | snd_info_unregister(snd_minor_info_oss_entry); | |
240 | #endif | |
241 | return 0; | |
242 | } | |
243 | ||
244 | int __init snd_oss_init_module(void) | |
245 | { | |
246 | int card; | |
247 | ||
248 | for (card = 0; card < SNDRV_CARDS; card++) | |
249 | INIT_LIST_HEAD(&snd_oss_minors_hash[card]); | |
250 | return 0; | |
251 | } | |
252 | ||
253 | #endif /* CONFIG_SND_OSSEMUL */ |