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/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>
35 #include <linux/mutex.h>
37 #define SNDRV_OSS_MINORS 128
39 static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS];
40 static DEFINE_MUTEX(sound_oss_mutex);
42 void *snd_lookup_oss_minor_data(unsigned int minor, int type)
44 struct snd_minor *mreg;
47 if (minor >= ARRAY_SIZE(snd_oss_minors))
49 mutex_lock(&sound_oss_mutex);
50 mreg = snd_oss_minors[minor];
51 if (mreg && mreg->type == type)
52 private_data = mreg->private_data;
55 mutex_unlock(&sound_oss_mutex);
59 EXPORT_SYMBOL(snd_lookup_oss_minor_data);
61 static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
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));
70 case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
71 minor = SNDRV_MINOR_OSS_SEQUENCER;
73 case SNDRV_OSS_DEVICE_TYPE_MUSIC:
74 minor = SNDRV_MINOR_OSS_MUSIC;
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));
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));
84 case SNDRV_OSS_DEVICE_TYPE_DMFM:
85 minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM);
87 case SNDRV_OSS_DEVICE_TYPE_SNDSTAT:
88 minor = SNDRV_MINOR_OSS_SNDSTAT;
93 snd_assert(minor >= 0 && minor < SNDRV_OSS_MINORS, return -EINVAL);
97 int snd_register_oss_device(int type, struct snd_card *card, int dev,
98 const struct file_operations *f_ops, void *private_data,
101 int minor = snd_oss_kernel_minor(type, card, dev);
103 struct snd_minor *preg;
104 int cidx = SNDRV_MINOR_OSS_CARD(minor);
106 int register1 = -1, register2 = -1;
107 struct device *carddev = snd_card_get_device_link(card);
109 if (card && card->number >= 8)
110 return 0; /* ignore silently */
113 preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL);
117 preg->card = card ? card->number : -1;
120 preg->private_data = private_data;
121 mutex_lock(&sound_oss_mutex);
122 snd_oss_minors[minor] = preg;
123 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);
128 case SNDRV_MINOR_OSS_MIDI:
129 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
131 case SNDRV_MINOR_OSS_MIDI1:
132 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
135 register1 = register_sound_special_device(f_ops, minor, carddev);
136 if (register1 != minor)
139 register2 = register_sound_special_device(f_ops, track2,
141 if (register2 != track2)
143 snd_oss_minors[track2] = preg;
145 mutex_unlock(&sound_oss_mutex);
150 unregister_sound_special(register2);
152 unregister_sound_special(register1);
153 snd_oss_minors[minor] = NULL;
154 mutex_unlock(&sound_oss_mutex);
159 EXPORT_SYMBOL(snd_register_oss_device);
161 int snd_unregister_oss_device(int type, struct snd_card *card, int dev)
163 int minor = snd_oss_kernel_minor(type, card, dev);
164 int cidx = SNDRV_MINOR_OSS_CARD(minor);
166 struct snd_minor *mptr;
168 if (card && card->number >= 8)
172 mutex_lock(&sound_oss_mutex);
173 mptr = snd_oss_minors[minor];
175 mutex_unlock(&sound_oss_mutex);
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);
183 case SNDRV_MINOR_OSS_MIDI:
184 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
186 case SNDRV_MINOR_OSS_MIDI1:
187 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
191 unregister_sound_special(track2);
192 snd_oss_minors[track2] = NULL;
194 snd_oss_minors[minor] = NULL;
195 mutex_unlock(&sound_oss_mutex);
200 EXPORT_SYMBOL(snd_unregister_oss_device);
206 #ifdef CONFIG_PROC_FS
208 static struct snd_info_entry *snd_minor_info_oss_entry;
210 static const char *snd_oss_device_type_name(int type)
213 case SNDRV_OSS_DEVICE_TYPE_MIXER:
215 case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
216 case SNDRV_OSS_DEVICE_TYPE_MUSIC:
218 case SNDRV_OSS_DEVICE_TYPE_PCM:
219 return "digital audio";
220 case SNDRV_OSS_DEVICE_TYPE_MIDI:
222 case SNDRV_OSS_DEVICE_TYPE_DMFM:
223 return "hardware dependent";
229 static void snd_minor_info_oss_read(struct snd_info_entry *entry,
230 struct snd_info_buffer *buffer)
233 struct snd_minor *mptr;
235 mutex_lock(&sound_oss_mutex);
236 for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) {
237 if (!(mptr = snd_oss_minors[minor]))
240 snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", minor,
241 mptr->card, mptr->device,
242 snd_oss_device_type_name(mptr->type));
244 snd_iprintf(buffer, "%3i: : %s\n", minor,
245 snd_oss_device_type_name(mptr->type));
247 mutex_unlock(&sound_oss_mutex);
251 int __init snd_minor_info_oss_init(void)
253 struct snd_info_entry *entry;
255 entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root);
257 entry->c.text.read = snd_minor_info_oss_read;
258 if (snd_info_register(entry) < 0) {
259 snd_info_free_entry(entry);
263 snd_minor_info_oss_entry = entry;
267 int __exit snd_minor_info_oss_done(void)
269 snd_info_free_entry(snd_minor_info_oss_entry);
272 #endif /* CONFIG_PROC_FS */
274 #endif /* CONFIG_SND_OSSEMUL */