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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010037#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
Clemens Ladisch6983b722005-11-20 14:05:49 +010039#define SNDRV_OSS_MINORS 128
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
Clemens Ladisch6983b722005-11-20 14:05:49 +010041static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS];
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010042static DEFINE_MUTEX(sound_oss_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Clemens Ladischf87135f2005-11-20 14:06:59 +010044void *snd_lookup_oss_minor_data(unsigned int minor, int type)
45{
46 struct snd_minor *mreg;
47 void *private_data;
48
Adrian Bunk3a63e4442006-03-13 14:14:10 +010049 if (minor >= ARRAY_SIZE(snd_oss_minors))
Clemens Ladischf87135f2005-11-20 14:06:59 +010050 return NULL;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010051 mutex_lock(&sound_oss_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +010052 mreg = snd_oss_minors[minor];
53 if (mreg && mreg->type == type)
54 private_data = mreg->private_data;
55 else
56 private_data = NULL;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010057 mutex_unlock(&sound_oss_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +010058 return private_data;
59}
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:
67 snd_assert(card != NULL && dev <= 1, return -EINVAL);
68 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER));
69 break;
70 case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
71 minor = SNDRV_MINOR_OSS_SEQUENCER;
72 break;
73 case SNDRV_OSS_DEVICE_TYPE_MUSIC:
74 minor = SNDRV_MINOR_OSS_MUSIC;
75 break;
76 case SNDRV_OSS_DEVICE_TYPE_PCM:
77 snd_assert(card != NULL && dev <= 1, return -EINVAL);
78 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM));
79 break;
80 case SNDRV_OSS_DEVICE_TYPE_MIDI:
81 snd_assert(card != NULL && dev <= 1, return -EINVAL);
82 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI));
83 break;
84 case SNDRV_OSS_DEVICE_TYPE_DMFM:
85 minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM);
86 break;
87 case SNDRV_OSS_DEVICE_TYPE_SNDSTAT:
88 minor = SNDRV_MINOR_OSS_SNDSTAT;
89 break;
90 default:
91 return -EINVAL;
92 }
Clemens Ladisch6983b722005-11-20 14:05:49 +010093 snd_assert(minor >= 0 && minor < SNDRV_OSS_MINORS, return -EINVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 return minor;
95}
96
Takashi Iwai174c1f62005-11-17 14:00:19 +010097int snd_register_oss_device(int type, struct snd_card *card, int dev,
Clemens Ladischf87135f2005-11-20 14:06:59 +010098 struct file_operations *f_ops, void *private_data,
99 const char *name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100{
101 int minor = snd_oss_kernel_minor(type, card, dev);
102 int minor_unit;
Takashi Iwai174c1f62005-11-17 14:00:19 +0100103 struct snd_minor *preg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 int cidx = SNDRV_MINOR_OSS_CARD(minor);
105 int track2 = -1;
106 int register1 = -1, register2 = -1;
Takashi Iwaid5681212005-08-30 08:58:37 +0200107 struct device *carddev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
Clemens Ladischd0015442005-11-20 14:09:05 +0100109 if (card && card->number >= 8)
110 return 0; /* ignore silently */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 if (minor < 0)
112 return minor;
Clemens Ladisch6983b722005-11-20 14:05:49 +0100113 preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 if (preg == NULL)
115 return -ENOMEM;
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100116 preg->type = type;
Clemens Ladisch6983b722005-11-20 14:05:49 +0100117 preg->card = card ? card->number : -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 preg->device = dev;
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100119 preg->f_ops = f_ops;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100120 preg->private_data = private_data;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100121 mutex_lock(&sound_oss_mutex);
Clemens Ladisch6983b722005-11-20 14:05:49 +0100122 snd_oss_minors[minor] = preg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 minor_unit = SNDRV_MINOR_OSS_DEVICE(minor);
124 switch (minor_unit) {
125 case SNDRV_MINOR_OSS_PCM:
126 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
127 break;
128 case SNDRV_MINOR_OSS_MIDI:
129 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
130 break;
131 case SNDRV_MINOR_OSS_MIDI1:
132 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
133 break;
134 }
Takashi Iwaid5681212005-08-30 08:58:37 +0200135 if (card)
136 carddev = card->dev;
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100137 register1 = register_sound_special_device(f_ops, minor, carddev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 if (register1 != minor)
139 goto __end;
140 if (track2 >= 0) {
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100141 register2 = register_sound_special_device(f_ops, track2,
142 carddev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 if (register2 != track2)
144 goto __end;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100145 snd_oss_minors[track2] = preg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100147 mutex_unlock(&sound_oss_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 return 0;
149
150 __end:
151 if (register2 >= 0)
152 unregister_sound_special(register2);
153 if (register1 >= 0)
154 unregister_sound_special(register1);
Clemens Ladisch6983b722005-11-20 14:05:49 +0100155 snd_oss_minors[minor] = NULL;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100156 mutex_unlock(&sound_oss_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 kfree(preg);
158 return -EBUSY;
159}
160
Takashi Iwai174c1f62005-11-17 14:00:19 +0100161int snd_unregister_oss_device(int type, struct snd_card *card, int dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162{
163 int minor = snd_oss_kernel_minor(type, card, dev);
164 int cidx = SNDRV_MINOR_OSS_CARD(minor);
165 int track2 = -1;
Takashi Iwai174c1f62005-11-17 14:00:19 +0100166 struct snd_minor *mptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
Clemens Ladischd0015442005-11-20 14:09:05 +0100168 if (card && card->number >= 8)
169 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 if (minor < 0)
171 return minor;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100172 mutex_lock(&sound_oss_mutex);
Clemens Ladisch6983b722005-11-20 14:05:49 +0100173 mptr = snd_oss_minors[minor];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 if (mptr == NULL) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100175 mutex_unlock(&sound_oss_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 return -ENOENT;
177 }
178 unregister_sound_special(minor);
179 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
180 case SNDRV_MINOR_OSS_PCM:
181 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
182 break;
183 case SNDRV_MINOR_OSS_MIDI:
184 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
185 break;
186 case SNDRV_MINOR_OSS_MIDI1:
187 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
188 break;
189 }
Clemens Ladischf87135f2005-11-20 14:06:59 +0100190 if (track2 >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 unregister_sound_special(track2);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100192 snd_oss_minors[track2] = NULL;
193 }
Clemens Ladisch6983b722005-11-20 14:05:49 +0100194 snd_oss_minors[minor] = NULL;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100195 mutex_unlock(&sound_oss_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 kfree(mptr);
197 return 0;
198}
199
200/*
201 * INFO PART
202 */
203
204#ifdef CONFIG_PROC_FS
205
Takashi Iwai174c1f62005-11-17 14:00:19 +0100206static struct snd_info_entry *snd_minor_info_oss_entry = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100208static const char *snd_oss_device_type_name(int type)
209{
210 switch (type) {
211 case SNDRV_OSS_DEVICE_TYPE_MIXER:
212 return "mixer";
213 case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
214 case SNDRV_OSS_DEVICE_TYPE_MUSIC:
215 return "sequencer";
216 case SNDRV_OSS_DEVICE_TYPE_PCM:
217 return "digital audio";
218 case SNDRV_OSS_DEVICE_TYPE_MIDI:
219 return "raw midi";
220 case SNDRV_OSS_DEVICE_TYPE_DMFM:
221 return "hardware dependent";
222 default:
223 return "?";
224 }
225}
226
Takashi Iwai174c1f62005-11-17 14:00:19 +0100227static void snd_minor_info_oss_read(struct snd_info_entry *entry,
228 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229{
Clemens Ladisch6983b722005-11-20 14:05:49 +0100230 int minor;
Takashi Iwai174c1f62005-11-17 14:00:19 +0100231 struct snd_minor *mptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100233 mutex_lock(&sound_oss_mutex);
Clemens Ladisch6983b722005-11-20 14:05:49 +0100234 for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) {
235 if (!(mptr = snd_oss_minors[minor]))
236 continue;
237 if (mptr->card >= 0)
238 snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", minor,
239 mptr->card, mptr->device,
240 snd_oss_device_type_name(mptr->type));
241 else
242 snd_iprintf(buffer, "%3i: : %s\n", minor,
243 snd_oss_device_type_name(mptr->type));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100245 mutex_unlock(&sound_oss_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246}
247
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
249int __init snd_minor_info_oss_init(void)
250{
Takashi Iwai174c1f62005-11-17 14:00:19 +0100251 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
253 entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root);
254 if (entry) {
255 entry->c.text.read_size = PAGE_SIZE;
256 entry->c.text.read = snd_minor_info_oss_read;
257 if (snd_info_register(entry) < 0) {
258 snd_info_free_entry(entry);
259 entry = NULL;
260 }
261 }
262 snd_minor_info_oss_entry = entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 return 0;
264}
265
266int __exit snd_minor_info_oss_done(void)
267{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 if (snd_minor_info_oss_entry)
269 snd_info_unregister(snd_minor_info_oss_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 return 0;
271}
Takashi Iwaie28563c2005-12-01 10:42:42 +0100272#endif /* CONFIG_PROC_FS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274#endif /* CONFIG_SND_OSSEMUL */