blob: 7fe12264ff80d60cba667b37804e082dc82d8ef3 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Advanced Linux Sound Architecture
Jaroslav Kyselac1017a42007-10-15 09:50:19 +02003 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#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>
29#include <linux/slab.h>
30#include <linux/time.h>
31#include <sound/core.h>
32#include <sound/minors.h>
33#include <sound/info.h>
34#include <linux/sound.h>
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010035#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Clemens Ladisch6983b722005-11-20 14:05:49 +010037#define SNDRV_OSS_MINORS 128
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
Clemens Ladisch6983b722005-11-20 14:05:49 +010039static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS];
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010040static DEFINE_MUTEX(sound_oss_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Clemens Ladischf87135f2005-11-20 14:06:59 +010042void *snd_lookup_oss_minor_data(unsigned int minor, int type)
43{
44 struct snd_minor *mreg;
45 void *private_data;
46
Adrian Bunk3a63e4442006-03-13 14:14:10 +010047 if (minor >= ARRAY_SIZE(snd_oss_minors))
Clemens Ladischf87135f2005-11-20 14:06:59 +010048 return NULL;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010049 mutex_lock(&sound_oss_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +010050 mreg = snd_oss_minors[minor];
51 if (mreg && mreg->type == type)
52 private_data = mreg->private_data;
53 else
54 private_data = NULL;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010055 mutex_unlock(&sound_oss_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +010056 return private_data;
57}
58
Takashi Iwaic0d3fb32006-04-28 15:13:39 +020059EXPORT_SYMBOL(snd_lookup_oss_minor_data);
60
Takashi Iwai174c1f62005-11-17 14:00:19 +010061static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070062{
63 int minor;
64
65 switch (type) {
66 case SNDRV_OSS_DEVICE_TYPE_MIXER:
Takashi Iwai7eaa9432008-08-08 17:09:09 +020067 if (snd_BUG_ON(!card || dev < 0 || dev > 1))
68 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER));
70 break;
71 case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
72 minor = SNDRV_MINOR_OSS_SEQUENCER;
73 break;
74 case SNDRV_OSS_DEVICE_TYPE_MUSIC:
75 minor = SNDRV_MINOR_OSS_MUSIC;
76 break;
77 case SNDRV_OSS_DEVICE_TYPE_PCM:
Takashi Iwai7eaa9432008-08-08 17:09:09 +020078 if (snd_BUG_ON(!card || dev < 0 || dev > 1))
79 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM));
81 break;
82 case SNDRV_OSS_DEVICE_TYPE_MIDI:
Takashi Iwai7eaa9432008-08-08 17:09:09 +020083 if (snd_BUG_ON(!card || dev < 0 || dev > 1))
84 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI));
86 break;
87 case SNDRV_OSS_DEVICE_TYPE_DMFM:
88 minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM);
89 break;
90 case SNDRV_OSS_DEVICE_TYPE_SNDSTAT:
91 minor = SNDRV_MINOR_OSS_SNDSTAT;
92 break;
93 default:
94 return -EINVAL;
95 }
Takashi Iwai7eaa9432008-08-08 17:09:09 +020096 if (snd_BUG_ON(minor < 0 || minor >= SNDRV_OSS_MINORS))
97 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 return minor;
99}
100
Takashi Iwai174c1f62005-11-17 14:00:19 +0100101int snd_register_oss_device(int type, struct snd_card *card, int dev,
Arjan van de Ven99ac48f2006-03-28 01:56:41 -0800102 const struct file_operations *f_ops, void *private_data,
Clemens Ladischf87135f2005-11-20 14:06:59 +0100103 const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104{
105 int minor = snd_oss_kernel_minor(type, card, dev);
106 int minor_unit;
Takashi Iwai174c1f62005-11-17 14:00:19 +0100107 struct snd_minor *preg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 int cidx = SNDRV_MINOR_OSS_CARD(minor);
109 int track2 = -1;
110 int register1 = -1, register2 = -1;
Takashi Iwai7d2aae12007-01-26 12:40:31 +0100111 struct device *carddev = snd_card_get_device_link(card);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
Clemens Ladischd0015442005-11-20 14:09:05 +0100113 if (card && card->number >= 8)
114 return 0; /* ignore silently */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 if (minor < 0)
116 return minor;
Clemens Ladisch6983b722005-11-20 14:05:49 +0100117 preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 if (preg == NULL)
119 return -ENOMEM;
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100120 preg->type = type;
Clemens Ladisch6983b722005-11-20 14:05:49 +0100121 preg->card = card ? card->number : -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 preg->device = dev;
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100123 preg->f_ops = f_ops;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100124 preg->private_data = private_data;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100125 mutex_lock(&sound_oss_mutex);
Clemens Ladisch6983b722005-11-20 14:05:49 +0100126 snd_oss_minors[minor] = preg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 minor_unit = SNDRV_MINOR_OSS_DEVICE(minor);
128 switch (minor_unit) {
129 case SNDRV_MINOR_OSS_PCM:
130 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
131 break;
132 case SNDRV_MINOR_OSS_MIDI:
133 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
134 break;
135 case SNDRV_MINOR_OSS_MIDI1:
136 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
137 break;
138 }
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100139 register1 = register_sound_special_device(f_ops, minor, carddev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 if (register1 != minor)
141 goto __end;
142 if (track2 >= 0) {
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100143 register2 = register_sound_special_device(f_ops, track2,
144 carddev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 if (register2 != track2)
146 goto __end;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100147 snd_oss_minors[track2] = preg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100149 mutex_unlock(&sound_oss_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 return 0;
151
152 __end:
153 if (register2 >= 0)
154 unregister_sound_special(register2);
155 if (register1 >= 0)
156 unregister_sound_special(register1);
Clemens Ladisch6983b722005-11-20 14:05:49 +0100157 snd_oss_minors[minor] = NULL;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100158 mutex_unlock(&sound_oss_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 kfree(preg);
160 return -EBUSY;
161}
162
Takashi Iwaic0d3fb32006-04-28 15:13:39 +0200163EXPORT_SYMBOL(snd_register_oss_device);
164
Takashi Iwai174c1f62005-11-17 14:00:19 +0100165int snd_unregister_oss_device(int type, struct snd_card *card, int dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166{
167 int minor = snd_oss_kernel_minor(type, card, dev);
168 int cidx = SNDRV_MINOR_OSS_CARD(minor);
169 int track2 = -1;
Takashi Iwai174c1f62005-11-17 14:00:19 +0100170 struct snd_minor *mptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
Clemens Ladischd0015442005-11-20 14:09:05 +0100172 if (card && card->number >= 8)
173 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 if (minor < 0)
175 return minor;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100176 mutex_lock(&sound_oss_mutex);
Clemens Ladisch6983b722005-11-20 14:05:49 +0100177 mptr = snd_oss_minors[minor];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 if (mptr == NULL) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100179 mutex_unlock(&sound_oss_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 return -ENOENT;
181 }
182 unregister_sound_special(minor);
183 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
184 case SNDRV_MINOR_OSS_PCM:
185 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
186 break;
187 case SNDRV_MINOR_OSS_MIDI:
188 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
189 break;
190 case SNDRV_MINOR_OSS_MIDI1:
191 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
192 break;
193 }
Clemens Ladischf87135f2005-11-20 14:06:59 +0100194 if (track2 >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 unregister_sound_special(track2);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100196 snd_oss_minors[track2] = NULL;
197 }
Clemens Ladisch6983b722005-11-20 14:05:49 +0100198 snd_oss_minors[minor] = NULL;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100199 mutex_unlock(&sound_oss_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 kfree(mptr);
201 return 0;
202}
203
Takashi Iwaic0d3fb32006-04-28 15:13:39 +0200204EXPORT_SYMBOL(snd_unregister_oss_device);
205
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206/*
207 * INFO PART
208 */
209
210#ifdef CONFIG_PROC_FS
211
Takashi Iwai6581f4e2006-05-17 17:14:51 +0200212static struct snd_info_entry *snd_minor_info_oss_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100214static const char *snd_oss_device_type_name(int type)
215{
216 switch (type) {
217 case SNDRV_OSS_DEVICE_TYPE_MIXER:
218 return "mixer";
219 case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
220 case SNDRV_OSS_DEVICE_TYPE_MUSIC:
221 return "sequencer";
222 case SNDRV_OSS_DEVICE_TYPE_PCM:
223 return "digital audio";
224 case SNDRV_OSS_DEVICE_TYPE_MIDI:
225 return "raw midi";
226 case SNDRV_OSS_DEVICE_TYPE_DMFM:
227 return "hardware dependent";
228 default:
229 return "?";
230 }
231}
232
Takashi Iwai174c1f62005-11-17 14:00:19 +0100233static void snd_minor_info_oss_read(struct snd_info_entry *entry,
234 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235{
Clemens Ladisch6983b722005-11-20 14:05:49 +0100236 int minor;
Takashi Iwai174c1f62005-11-17 14:00:19 +0100237 struct snd_minor *mptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100239 mutex_lock(&sound_oss_mutex);
Clemens Ladisch6983b722005-11-20 14:05:49 +0100240 for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) {
241 if (!(mptr = snd_oss_minors[minor]))
242 continue;
243 if (mptr->card >= 0)
244 snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", minor,
245 mptr->card, mptr->device,
246 snd_oss_device_type_name(mptr->type));
247 else
248 snd_iprintf(buffer, "%3i: : %s\n", minor,
249 snd_oss_device_type_name(mptr->type));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100251 mutex_unlock(&sound_oss_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252}
253
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
255int __init snd_minor_info_oss_init(void)
256{
Takashi Iwai174c1f62005-11-17 14:00:19 +0100257 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
259 entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root);
260 if (entry) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 entry->c.text.read = snd_minor_info_oss_read;
262 if (snd_info_register(entry) < 0) {
263 snd_info_free_entry(entry);
264 entry = NULL;
265 }
266 }
267 snd_minor_info_oss_entry = entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 return 0;
269}
270
271int __exit snd_minor_info_oss_done(void)
272{
Takashi Iwai746d4a02006-06-23 14:37:59 +0200273 snd_info_free_entry(snd_minor_info_oss_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 return 0;
275}
Takashi Iwaie28563c2005-12-01 10:42:42 +0100276#endif /* CONFIG_PROC_FS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278#endif /* CONFIG_SND_OSSEMUL */