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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> | |
1a60d4c5 | 37 | #include <linux/mutex.h> |
1da177e4 | 38 | |
6983b724 | 39 | #define SNDRV_OSS_MINORS 128 |
1da177e4 | 40 | |
6983b724 | 41 | static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS]; |
1a60d4c5 | 42 | static DEFINE_MUTEX(sound_oss_mutex); |
1da177e4 | 43 | |
f87135f5 CL |
44 | void *snd_lookup_oss_minor_data(unsigned int minor, int type) |
45 | { | |
46 | struct snd_minor *mreg; | |
47 | void *private_data; | |
48 | ||
3a63e444 | 49 | if (minor >= ARRAY_SIZE(snd_oss_minors)) |
f87135f5 | 50 | return NULL; |
1a60d4c5 | 51 | mutex_lock(&sound_oss_mutex); |
f87135f5 CL |
52 | mreg = snd_oss_minors[minor]; |
53 | if (mreg && mreg->type == type) | |
54 | private_data = mreg->private_data; | |
55 | else | |
56 | private_data = NULL; | |
1a60d4c5 | 57 | mutex_unlock(&sound_oss_mutex); |
f87135f5 CL |
58 | return private_data; |
59 | } | |
60 | ||
c0d3fb39 TI |
61 | EXPORT_SYMBOL(snd_lookup_oss_minor_data); |
62 | ||
174c1f65 | 63 | static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev) |
1da177e4 LT |
64 | { |
65 | int minor; | |
66 | ||
67 | switch (type) { | |
68 | case SNDRV_OSS_DEVICE_TYPE_MIXER: | |
69 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | |
70 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER)); | |
71 | break; | |
72 | case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: | |
73 | minor = SNDRV_MINOR_OSS_SEQUENCER; | |
74 | break; | |
75 | case SNDRV_OSS_DEVICE_TYPE_MUSIC: | |
76 | minor = SNDRV_MINOR_OSS_MUSIC; | |
77 | break; | |
78 | case SNDRV_OSS_DEVICE_TYPE_PCM: | |
79 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | |
80 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM)); | |
81 | break; | |
82 | case SNDRV_OSS_DEVICE_TYPE_MIDI: | |
83 | snd_assert(card != NULL && dev <= 1, return -EINVAL); | |
84 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI)); | |
85 | break; | |
86 | case SNDRV_OSS_DEVICE_TYPE_DMFM: | |
87 | minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM); | |
88 | break; | |
89 | case SNDRV_OSS_DEVICE_TYPE_SNDSTAT: | |
90 | minor = SNDRV_MINOR_OSS_SNDSTAT; | |
91 | break; | |
92 | default: | |
93 | return -EINVAL; | |
94 | } | |
6983b724 | 95 | snd_assert(minor >= 0 && minor < SNDRV_OSS_MINORS, return -EINVAL); |
1da177e4 LT |
96 | return minor; |
97 | } | |
98 | ||
174c1f65 | 99 | int snd_register_oss_device(int type, struct snd_card *card, int dev, |
99ac48f5 | 100 | const struct file_operations *f_ops, void *private_data, |
f87135f5 | 101 | const char *name) |
1da177e4 LT |
102 | { |
103 | int minor = snd_oss_kernel_minor(type, card, dev); | |
104 | int minor_unit; | |
174c1f65 | 105 | struct snd_minor *preg; |
1da177e4 LT |
106 | int cidx = SNDRV_MINOR_OSS_CARD(minor); |
107 | int track2 = -1; | |
108 | int register1 = -1, register2 = -1; | |
7d2aae1e | 109 | struct device *carddev = snd_card_get_device_link(card); |
1da177e4 | 110 | |
d001544d CL |
111 | if (card && card->number >= 8) |
112 | return 0; /* ignore silently */ | |
1da177e4 LT |
113 | if (minor < 0) |
114 | return minor; | |
6983b724 | 115 | preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL); |
1da177e4 LT |
116 | if (preg == NULL) |
117 | return -ENOMEM; | |
2af677fc | 118 | preg->type = type; |
6983b724 | 119 | preg->card = card ? card->number : -1; |
1da177e4 | 120 | preg->device = dev; |
2af677fc | 121 | preg->f_ops = f_ops; |
f87135f5 | 122 | preg->private_data = private_data; |
1a60d4c5 | 123 | mutex_lock(&sound_oss_mutex); |
6983b724 | 124 | snd_oss_minors[minor] = preg; |
1da177e4 LT |
125 | minor_unit = SNDRV_MINOR_OSS_DEVICE(minor); |
126 | switch (minor_unit) { | |
127 | case SNDRV_MINOR_OSS_PCM: | |
128 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); | |
129 | break; | |
130 | case SNDRV_MINOR_OSS_MIDI: | |
131 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); | |
132 | break; | |
133 | case SNDRV_MINOR_OSS_MIDI1: | |
134 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); | |
135 | break; | |
136 | } | |
2af677fc | 137 | register1 = register_sound_special_device(f_ops, minor, carddev); |
1da177e4 LT |
138 | if (register1 != minor) |
139 | goto __end; | |
140 | if (track2 >= 0) { | |
2af677fc CL |
141 | register2 = register_sound_special_device(f_ops, track2, |
142 | carddev); | |
1da177e4 LT |
143 | if (register2 != track2) |
144 | goto __end; | |
f87135f5 | 145 | snd_oss_minors[track2] = preg; |
1da177e4 | 146 | } |
1a60d4c5 | 147 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
148 | return 0; |
149 | ||
150 | __end: | |
151 | if (register2 >= 0) | |
152 | unregister_sound_special(register2); | |
153 | if (register1 >= 0) | |
154 | unregister_sound_special(register1); | |
6983b724 | 155 | snd_oss_minors[minor] = NULL; |
1a60d4c5 | 156 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
157 | kfree(preg); |
158 | return -EBUSY; | |
159 | } | |
160 | ||
c0d3fb39 TI |
161 | EXPORT_SYMBOL(snd_register_oss_device); |
162 | ||
174c1f65 | 163 | int snd_unregister_oss_device(int type, struct snd_card *card, int dev) |
1da177e4 LT |
164 | { |
165 | int minor = snd_oss_kernel_minor(type, card, dev); | |
166 | int cidx = SNDRV_MINOR_OSS_CARD(minor); | |
167 | int track2 = -1; | |
174c1f65 | 168 | struct snd_minor *mptr; |
1da177e4 | 169 | |
d001544d CL |
170 | if (card && card->number >= 8) |
171 | return 0; | |
1da177e4 LT |
172 | if (minor < 0) |
173 | return minor; | |
1a60d4c5 | 174 | mutex_lock(&sound_oss_mutex); |
6983b724 | 175 | mptr = snd_oss_minors[minor]; |
1da177e4 | 176 | if (mptr == NULL) { |
1a60d4c5 | 177 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
178 | return -ENOENT; |
179 | } | |
180 | unregister_sound_special(minor); | |
181 | switch (SNDRV_MINOR_OSS_DEVICE(minor)) { | |
182 | case SNDRV_MINOR_OSS_PCM: | |
183 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); | |
184 | break; | |
185 | case SNDRV_MINOR_OSS_MIDI: | |
186 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); | |
187 | break; | |
188 | case SNDRV_MINOR_OSS_MIDI1: | |
189 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); | |
190 | break; | |
191 | } | |
f87135f5 | 192 | if (track2 >= 0) { |
1da177e4 | 193 | unregister_sound_special(track2); |
f87135f5 CL |
194 | snd_oss_minors[track2] = NULL; |
195 | } | |
6983b724 | 196 | snd_oss_minors[minor] = NULL; |
1a60d4c5 | 197 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
198 | kfree(mptr); |
199 | return 0; | |
200 | } | |
201 | ||
c0d3fb39 TI |
202 | EXPORT_SYMBOL(snd_unregister_oss_device); |
203 | ||
1da177e4 LT |
204 | /* |
205 | * INFO PART | |
206 | */ | |
207 | ||
208 | #ifdef CONFIG_PROC_FS | |
209 | ||
6581f4e7 | 210 | static struct snd_info_entry *snd_minor_info_oss_entry; |
1da177e4 | 211 | |
2af677fc CL |
212 | static const char *snd_oss_device_type_name(int type) |
213 | { | |
214 | switch (type) { | |
215 | case SNDRV_OSS_DEVICE_TYPE_MIXER: | |
216 | return "mixer"; | |
217 | case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: | |
218 | case SNDRV_OSS_DEVICE_TYPE_MUSIC: | |
219 | return "sequencer"; | |
220 | case SNDRV_OSS_DEVICE_TYPE_PCM: | |
221 | return "digital audio"; | |
222 | case SNDRV_OSS_DEVICE_TYPE_MIDI: | |
223 | return "raw midi"; | |
224 | case SNDRV_OSS_DEVICE_TYPE_DMFM: | |
225 | return "hardware dependent"; | |
226 | default: | |
227 | return "?"; | |
228 | } | |
229 | } | |
230 | ||
174c1f65 TI |
231 | static void snd_minor_info_oss_read(struct snd_info_entry *entry, |
232 | struct snd_info_buffer *buffer) | |
1da177e4 | 233 | { |
6983b724 | 234 | int minor; |
174c1f65 | 235 | struct snd_minor *mptr; |
1da177e4 | 236 | |
1a60d4c5 | 237 | mutex_lock(&sound_oss_mutex); |
6983b724 CL |
238 | for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) { |
239 | if (!(mptr = snd_oss_minors[minor])) | |
240 | continue; | |
241 | if (mptr->card >= 0) | |
242 | snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", minor, | |
243 | mptr->card, mptr->device, | |
244 | snd_oss_device_type_name(mptr->type)); | |
245 | else | |
246 | snd_iprintf(buffer, "%3i: : %s\n", minor, | |
247 | snd_oss_device_type_name(mptr->type)); | |
1da177e4 | 248 | } |
1a60d4c5 | 249 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
250 | } |
251 | ||
1da177e4 LT |
252 | |
253 | int __init snd_minor_info_oss_init(void) | |
254 | { | |
174c1f65 | 255 | struct snd_info_entry *entry; |
1da177e4 LT |
256 | |
257 | entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root); | |
258 | if (entry) { | |
1da177e4 LT |
259 | entry->c.text.read = snd_minor_info_oss_read; |
260 | if (snd_info_register(entry) < 0) { | |
261 | snd_info_free_entry(entry); | |
262 | entry = NULL; | |
263 | } | |
264 | } | |
265 | snd_minor_info_oss_entry = entry; | |
1da177e4 LT |
266 | return 0; |
267 | } | |
268 | ||
269 | int __exit snd_minor_info_oss_done(void) | |
270 | { | |
746d4a02 | 271 | snd_info_free_entry(snd_minor_info_oss_entry); |
1da177e4 LT |
272 | return 0; |
273 | } | |
e28563cc | 274 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 275 | |
1da177e4 | 276 | #endif /* CONFIG_SND_OSSEMUL */ |