2 * Advanced Linux Sound Architecture
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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.
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.
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
22 #ifdef CONFIG_SND_OSSEMUL
24 #if !defined(CONFIG_SOUND) && !(defined(MODULE) && defined(CONFIG_SOUND_MODULE))
25 #error "Enable the OSS soundcore multiplexer (CONFIG_SOUND) in the kernel."
28 #include <linux/init.h>
29 #include <linux/export.h>
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>
36 #include <linux/mutex.h>
38 #define SNDRV_OSS_MINORS 256
40 static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS];
41 static DEFINE_MUTEX(sound_oss_mutex);
43 void *snd_lookup_oss_minor_data(unsigned int minor, int type)
45 struct snd_minor *mreg;
48 if (minor >= ARRAY_SIZE(snd_oss_minors))
50 mutex_lock(&sound_oss_mutex);
51 mreg = snd_oss_minors[minor];
52 if (mreg && mreg->type == type)
53 private_data = mreg->private_data;
56 mutex_unlock(&sound_oss_mutex);
60 EXPORT_SYMBOL(snd_lookup_oss_minor_data);
62 static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
67 case SNDRV_OSS_DEVICE_TYPE_MIXER:
68 if (snd_BUG_ON(!card || dev < 0 || dev > 1))
70 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER));
72 case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
73 minor = SNDRV_MINOR_OSS_SEQUENCER;
75 case SNDRV_OSS_DEVICE_TYPE_MUSIC:
76 minor = SNDRV_MINOR_OSS_MUSIC;
78 case SNDRV_OSS_DEVICE_TYPE_PCM:
79 if (snd_BUG_ON(!card || dev < 0 || dev > 1))
81 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM));
83 case SNDRV_OSS_DEVICE_TYPE_MIDI:
84 if (snd_BUG_ON(!card || dev < 0 || dev > 1))
86 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI));
88 case SNDRV_OSS_DEVICE_TYPE_DMFM:
89 minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM);
91 case SNDRV_OSS_DEVICE_TYPE_SNDSTAT:
92 minor = SNDRV_MINOR_OSS_SNDSTAT;
97 if (minor < 0 || minor >= SNDRV_OSS_MINORS)
102 int snd_register_oss_device(int type, struct snd_card *card, int dev,
103 const struct file_operations *f_ops, void *private_data,
106 int minor = snd_oss_kernel_minor(type, card, dev);
108 struct snd_minor *preg;
109 int cidx = SNDRV_MINOR_OSS_CARD(minor);
111 int register1 = -1, register2 = -1;
112 struct device *carddev = snd_card_get_device_link(card);
114 if (card && card->number >= SNDRV_MINOR_OSS_DEVICES)
115 return 0; /* ignore silently */
118 preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL);
122 preg->card = card ? card->number : -1;
125 preg->private_data = private_data;
126 mutex_lock(&sound_oss_mutex);
127 snd_oss_minors[minor] = preg;
128 minor_unit = SNDRV_MINOR_OSS_DEVICE(minor);
129 switch (minor_unit) {
130 case SNDRV_MINOR_OSS_PCM:
131 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
133 case SNDRV_MINOR_OSS_MIDI:
134 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
136 case SNDRV_MINOR_OSS_MIDI1:
137 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
140 register1 = register_sound_special_device(f_ops, minor, carddev);
141 if (register1 != minor)
144 register2 = register_sound_special_device(f_ops, track2,
146 if (register2 != track2)
148 snd_oss_minors[track2] = preg;
150 mutex_unlock(&sound_oss_mutex);
155 unregister_sound_special(register2);
157 unregister_sound_special(register1);
158 snd_oss_minors[minor] = NULL;
159 mutex_unlock(&sound_oss_mutex);
164 EXPORT_SYMBOL(snd_register_oss_device);
166 int snd_unregister_oss_device(int type, struct snd_card *card, int dev)
168 int minor = snd_oss_kernel_minor(type, card, dev);
169 int cidx = SNDRV_MINOR_OSS_CARD(minor);
171 struct snd_minor *mptr;
173 if (card && card->number >= SNDRV_MINOR_OSS_DEVICES)
177 mutex_lock(&sound_oss_mutex);
178 mptr = snd_oss_minors[minor];
180 mutex_unlock(&sound_oss_mutex);
183 unregister_sound_special(minor);
184 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
185 case SNDRV_MINOR_OSS_PCM:
186 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
188 case SNDRV_MINOR_OSS_MIDI:
189 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
191 case SNDRV_MINOR_OSS_MIDI1:
192 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
196 unregister_sound_special(track2);
197 snd_oss_minors[track2] = NULL;
199 snd_oss_minors[minor] = NULL;
200 mutex_unlock(&sound_oss_mutex);
205 EXPORT_SYMBOL(snd_unregister_oss_device);
211 #ifdef CONFIG_PROC_FS
213 static struct snd_info_entry *snd_minor_info_oss_entry;
215 static const char *snd_oss_device_type_name(int type)
218 case SNDRV_OSS_DEVICE_TYPE_MIXER:
220 case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
221 case SNDRV_OSS_DEVICE_TYPE_MUSIC:
223 case SNDRV_OSS_DEVICE_TYPE_PCM:
224 return "digital audio";
225 case SNDRV_OSS_DEVICE_TYPE_MIDI:
227 case SNDRV_OSS_DEVICE_TYPE_DMFM:
228 return "hardware dependent";
234 static void snd_minor_info_oss_read(struct snd_info_entry *entry,
235 struct snd_info_buffer *buffer)
238 struct snd_minor *mptr;
240 mutex_lock(&sound_oss_mutex);
241 for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) {
242 if (!(mptr = snd_oss_minors[minor]))
245 snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", minor,
246 mptr->card, mptr->device,
247 snd_oss_device_type_name(mptr->type));
249 snd_iprintf(buffer, "%3i: : %s\n", minor,
250 snd_oss_device_type_name(mptr->type));
252 mutex_unlock(&sound_oss_mutex);
256 int __init snd_minor_info_oss_init(void)
258 struct snd_info_entry *entry;
260 entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root);
262 entry->c.text.read = snd_minor_info_oss_read;
263 if (snd_info_register(entry) < 0) {
264 snd_info_free_entry(entry);
268 snd_minor_info_oss_entry = entry;
272 int __exit snd_minor_info_oss_done(void)
274 snd_info_free_entry(snd_minor_info_oss_entry);
277 #endif /* CONFIG_PROC_FS */
279 #endif /* CONFIG_SND_OSSEMUL */