Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Advanced Linux Sound Architecture | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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 | ||
1da177e4 LT |
22 | #ifdef CONFIG_SND_OSSEMUL |
23 | ||
24 | #if !defined(CONFIG_SOUND) && !(defined(MODULE) && defined(CONFIG_SOUND_MODULE)) | |
25 | #error "Enable the OSS soundcore multiplexer (CONFIG_SOUND) in the kernel." | |
26 | #endif | |
27 | ||
28 | #include <linux/init.h> | |
d81a6d71 | 29 | #include <linux/export.h> |
1da177e4 LT |
30 | #include <linux/slab.h> |
31 | #include <linux/time.h> | |
32 | #include <sound/core.h> | |
33 | #include <sound/minors.h> | |
34 | #include <sound/info.h> | |
35 | #include <linux/sound.h> | |
1a60d4c5 | 36 | #include <linux/mutex.h> |
1da177e4 | 37 | |
779ae5a0 | 38 | #define SNDRV_OSS_MINORS 256 |
1da177e4 | 39 | |
6983b724 | 40 | static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS]; |
1a60d4c5 | 41 | static DEFINE_MUTEX(sound_oss_mutex); |
1da177e4 | 42 | |
a0830dbd TI |
43 | /* NOTE: This function increments the refcount of the associated card like |
44 | * snd_lookup_minor_data(); the caller must call snd_card_unref() appropriately | |
45 | */ | |
f87135f5 CL |
46 | void *snd_lookup_oss_minor_data(unsigned int minor, int type) |
47 | { | |
48 | struct snd_minor *mreg; | |
49 | void *private_data; | |
50 | ||
3a63e444 | 51 | if (minor >= ARRAY_SIZE(snd_oss_minors)) |
f87135f5 | 52 | return NULL; |
1a60d4c5 | 53 | mutex_lock(&sound_oss_mutex); |
f87135f5 | 54 | mreg = snd_oss_minors[minor]; |
a0830dbd | 55 | if (mreg && mreg->type == type) { |
f87135f5 | 56 | private_data = mreg->private_data; |
8bb4d9ce | 57 | if (private_data && mreg->card_ptr) |
a0830dbd TI |
58 | atomic_inc(&mreg->card_ptr->refcount); |
59 | } else | |
f87135f5 | 60 | private_data = NULL; |
1a60d4c5 | 61 | mutex_unlock(&sound_oss_mutex); |
f87135f5 CL |
62 | return private_data; |
63 | } | |
64 | ||
c0d3fb39 TI |
65 | EXPORT_SYMBOL(snd_lookup_oss_minor_data); |
66 | ||
174c1f65 | 67 | static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev) |
1da177e4 LT |
68 | { |
69 | int minor; | |
70 | ||
71 | switch (type) { | |
72 | case SNDRV_OSS_DEVICE_TYPE_MIXER: | |
7eaa943c TI |
73 | if (snd_BUG_ON(!card || dev < 0 || dev > 1)) |
74 | return -EINVAL; | |
1da177e4 LT |
75 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER)); |
76 | break; | |
77 | case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: | |
78 | minor = SNDRV_MINOR_OSS_SEQUENCER; | |
79 | break; | |
80 | case SNDRV_OSS_DEVICE_TYPE_MUSIC: | |
81 | minor = SNDRV_MINOR_OSS_MUSIC; | |
82 | break; | |
83 | case SNDRV_OSS_DEVICE_TYPE_PCM: | |
7eaa943c TI |
84 | if (snd_BUG_ON(!card || dev < 0 || dev > 1)) |
85 | return -EINVAL; | |
1da177e4 LT |
86 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM)); |
87 | break; | |
88 | case SNDRV_OSS_DEVICE_TYPE_MIDI: | |
7eaa943c TI |
89 | if (snd_BUG_ON(!card || dev < 0 || dev > 1)) |
90 | return -EINVAL; | |
1da177e4 LT |
91 | minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI)); |
92 | break; | |
93 | case SNDRV_OSS_DEVICE_TYPE_DMFM: | |
94 | minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM); | |
95 | break; | |
96 | case SNDRV_OSS_DEVICE_TYPE_SNDSTAT: | |
97 | minor = SNDRV_MINOR_OSS_SNDSTAT; | |
98 | break; | |
99 | default: | |
100 | return -EINVAL; | |
101 | } | |
808c569f | 102 | if (minor < 0 || minor >= SNDRV_OSS_MINORS) |
7eaa943c | 103 | return -EINVAL; |
1da177e4 LT |
104 | return minor; |
105 | } | |
106 | ||
174c1f65 | 107 | int snd_register_oss_device(int type, struct snd_card *card, int dev, |
99ac48f5 | 108 | const struct file_operations *f_ops, void *private_data, |
f87135f5 | 109 | const char *name) |
1da177e4 LT |
110 | { |
111 | int minor = snd_oss_kernel_minor(type, card, dev); | |
112 | int minor_unit; | |
174c1f65 | 113 | struct snd_minor *preg; |
1da177e4 LT |
114 | int cidx = SNDRV_MINOR_OSS_CARD(minor); |
115 | int track2 = -1; | |
116 | int register1 = -1, register2 = -1; | |
7d2aae1e | 117 | struct device *carddev = snd_card_get_device_link(card); |
1da177e4 | 118 | |
779ae5a0 | 119 | if (card && card->number >= SNDRV_MINOR_OSS_DEVICES) |
d001544d | 120 | return 0; /* ignore silently */ |
1da177e4 LT |
121 | if (minor < 0) |
122 | return minor; | |
6983b724 | 123 | preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL); |
1da177e4 LT |
124 | if (preg == NULL) |
125 | return -ENOMEM; | |
2af677fc | 126 | preg->type = type; |
6983b724 | 127 | preg->card = card ? card->number : -1; |
1da177e4 | 128 | preg->device = dev; |
2af677fc | 129 | preg->f_ops = f_ops; |
f87135f5 | 130 | preg->private_data = private_data; |
a0830dbd | 131 | preg->card_ptr = card; |
1a60d4c5 | 132 | mutex_lock(&sound_oss_mutex); |
6983b724 | 133 | snd_oss_minors[minor] = preg; |
1da177e4 LT |
134 | minor_unit = SNDRV_MINOR_OSS_DEVICE(minor); |
135 | switch (minor_unit) { | |
136 | case SNDRV_MINOR_OSS_PCM: | |
137 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); | |
138 | break; | |
139 | case SNDRV_MINOR_OSS_MIDI: | |
140 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); | |
141 | break; | |
142 | case SNDRV_MINOR_OSS_MIDI1: | |
143 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); | |
144 | break; | |
145 | } | |
2af677fc | 146 | register1 = register_sound_special_device(f_ops, minor, carddev); |
1da177e4 LT |
147 | if (register1 != minor) |
148 | goto __end; | |
149 | if (track2 >= 0) { | |
2af677fc CL |
150 | register2 = register_sound_special_device(f_ops, track2, |
151 | carddev); | |
1da177e4 LT |
152 | if (register2 != track2) |
153 | goto __end; | |
f87135f5 | 154 | snd_oss_minors[track2] = preg; |
1da177e4 | 155 | } |
1a60d4c5 | 156 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
157 | return 0; |
158 | ||
159 | __end: | |
160 | if (register2 >= 0) | |
161 | unregister_sound_special(register2); | |
162 | if (register1 >= 0) | |
163 | unregister_sound_special(register1); | |
6983b724 | 164 | snd_oss_minors[minor] = NULL; |
1a60d4c5 | 165 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
166 | kfree(preg); |
167 | return -EBUSY; | |
168 | } | |
169 | ||
c0d3fb39 TI |
170 | EXPORT_SYMBOL(snd_register_oss_device); |
171 | ||
174c1f65 | 172 | int snd_unregister_oss_device(int type, struct snd_card *card, int dev) |
1da177e4 LT |
173 | { |
174 | int minor = snd_oss_kernel_minor(type, card, dev); | |
175 | int cidx = SNDRV_MINOR_OSS_CARD(minor); | |
176 | int track2 = -1; | |
174c1f65 | 177 | struct snd_minor *mptr; |
1da177e4 | 178 | |
779ae5a0 | 179 | if (card && card->number >= SNDRV_MINOR_OSS_DEVICES) |
d001544d | 180 | return 0; |
1da177e4 LT |
181 | if (minor < 0) |
182 | return minor; | |
1a60d4c5 | 183 | mutex_lock(&sound_oss_mutex); |
6983b724 | 184 | mptr = snd_oss_minors[minor]; |
1da177e4 | 185 | if (mptr == NULL) { |
1a60d4c5 | 186 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
187 | return -ENOENT; |
188 | } | |
189 | unregister_sound_special(minor); | |
190 | switch (SNDRV_MINOR_OSS_DEVICE(minor)) { | |
191 | case SNDRV_MINOR_OSS_PCM: | |
192 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO); | |
193 | break; | |
194 | case SNDRV_MINOR_OSS_MIDI: | |
195 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI); | |
196 | break; | |
197 | case SNDRV_MINOR_OSS_MIDI1: | |
198 | track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1); | |
199 | break; | |
200 | } | |
f87135f5 | 201 | if (track2 >= 0) { |
1da177e4 | 202 | unregister_sound_special(track2); |
f87135f5 CL |
203 | snd_oss_minors[track2] = NULL; |
204 | } | |
6983b724 | 205 | snd_oss_minors[minor] = NULL; |
1a60d4c5 | 206 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
207 | kfree(mptr); |
208 | return 0; | |
209 | } | |
210 | ||
c0d3fb39 TI |
211 | EXPORT_SYMBOL(snd_unregister_oss_device); |
212 | ||
1da177e4 LT |
213 | /* |
214 | * INFO PART | |
215 | */ | |
216 | ||
217 | #ifdef CONFIG_PROC_FS | |
218 | ||
6581f4e7 | 219 | static struct snd_info_entry *snd_minor_info_oss_entry; |
1da177e4 | 220 | |
2af677fc CL |
221 | static const char *snd_oss_device_type_name(int type) |
222 | { | |
223 | switch (type) { | |
224 | case SNDRV_OSS_DEVICE_TYPE_MIXER: | |
225 | return "mixer"; | |
226 | case SNDRV_OSS_DEVICE_TYPE_SEQUENCER: | |
227 | case SNDRV_OSS_DEVICE_TYPE_MUSIC: | |
228 | return "sequencer"; | |
229 | case SNDRV_OSS_DEVICE_TYPE_PCM: | |
230 | return "digital audio"; | |
231 | case SNDRV_OSS_DEVICE_TYPE_MIDI: | |
232 | return "raw midi"; | |
233 | case SNDRV_OSS_DEVICE_TYPE_DMFM: | |
234 | return "hardware dependent"; | |
235 | default: | |
236 | return "?"; | |
237 | } | |
238 | } | |
239 | ||
174c1f65 TI |
240 | static void snd_minor_info_oss_read(struct snd_info_entry *entry, |
241 | struct snd_info_buffer *buffer) | |
1da177e4 | 242 | { |
6983b724 | 243 | int minor; |
174c1f65 | 244 | struct snd_minor *mptr; |
1da177e4 | 245 | |
1a60d4c5 | 246 | mutex_lock(&sound_oss_mutex); |
6983b724 CL |
247 | for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) { |
248 | if (!(mptr = snd_oss_minors[minor])) | |
249 | continue; | |
250 | if (mptr->card >= 0) | |
251 | snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", minor, | |
252 | mptr->card, mptr->device, | |
253 | snd_oss_device_type_name(mptr->type)); | |
254 | else | |
255 | snd_iprintf(buffer, "%3i: : %s\n", minor, | |
256 | snd_oss_device_type_name(mptr->type)); | |
1da177e4 | 257 | } |
1a60d4c5 | 258 | mutex_unlock(&sound_oss_mutex); |
1da177e4 LT |
259 | } |
260 | ||
1da177e4 LT |
261 | |
262 | int __init snd_minor_info_oss_init(void) | |
263 | { | |
174c1f65 | 264 | struct snd_info_entry *entry; |
1da177e4 LT |
265 | |
266 | entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root); | |
267 | if (entry) { | |
1da177e4 LT |
268 | entry->c.text.read = snd_minor_info_oss_read; |
269 | if (snd_info_register(entry) < 0) { | |
270 | snd_info_free_entry(entry); | |
271 | entry = NULL; | |
272 | } | |
273 | } | |
274 | snd_minor_info_oss_entry = entry; | |
1da177e4 LT |
275 | return 0; |
276 | } | |
277 | ||
278 | int __exit snd_minor_info_oss_done(void) | |
279 | { | |
746d4a02 | 280 | snd_info_free_entry(snd_minor_info_oss_entry); |
1da177e4 LT |
281 | return 0; |
282 | } | |
e28563cc | 283 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 284 | |
1da177e4 | 285 | #endif /* CONFIG_SND_OSSEMUL */ |