2 * Advanced Linux Sound Architecture
3 * Copyright (c) by Jaroslav Kysela <perex@suse.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 #include <sound/driver.h>
24 #ifdef CONFIG_SND_OSSEMUL
26 #if !defined(CONFIG_SOUND) && !(defined(MODULE) && defined(CONFIG_SOUND_MODULE))
27 #error "Enable the OSS soundcore multiplexer (CONFIG_SOUND) in the kernel."
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>
38 #define SNDRV_OS_MINORS 256
40 static struct list_head snd_oss_minors_hash[SNDRV_CARDS];
42 static DECLARE_MUTEX(sound_oss_mutex);
44 static struct snd_minor *snd_oss_minor_search(int minor)
46 struct list_head *list;
47 struct snd_minor *mptr;
49 list_for_each(list, &snd_oss_minors_hash[SNDRV_MINOR_OSS_CARD(minor)]) {
50 mptr = list_entry(list, struct snd_minor, list);
51 if (mptr->number == minor)
57 static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
62 case SNDRV_OSS_DEVICE_TYPE_MIXER:
63 snd_assert(card != NULL && dev <= 1, return -EINVAL);
64 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER));
66 case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
67 minor = SNDRV_MINOR_OSS_SEQUENCER;
69 case SNDRV_OSS_DEVICE_TYPE_MUSIC:
70 minor = SNDRV_MINOR_OSS_MUSIC;
72 case SNDRV_OSS_DEVICE_TYPE_PCM:
73 snd_assert(card != NULL && dev <= 1, return -EINVAL);
74 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM));
76 case SNDRV_OSS_DEVICE_TYPE_MIDI:
77 snd_assert(card != NULL && dev <= 1, return -EINVAL);
78 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI));
80 case SNDRV_OSS_DEVICE_TYPE_DMFM:
81 minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM);
83 case SNDRV_OSS_DEVICE_TYPE_SNDSTAT:
84 minor = SNDRV_MINOR_OSS_SNDSTAT;
89 snd_assert(minor >= 0 && minor < SNDRV_OS_MINORS, return -EINVAL);
93 int snd_register_oss_device(int type, struct snd_card *card, int dev,
94 struct snd_minor * reg, const char *name)
96 int minor = snd_oss_kernel_minor(type, card, dev);
98 struct snd_minor *preg;
99 int cidx = SNDRV_MINOR_OSS_CARD(minor);
101 int register1 = -1, register2 = -1;
102 struct device *carddev = NULL;
106 preg = (struct snd_minor *)kmalloc(sizeof(struct snd_minor), GFP_KERNEL);
110 preg->number = minor;
112 down(&sound_oss_mutex);
113 list_add_tail(&preg->list, &snd_oss_minors_hash[cidx]);
114 minor_unit = SNDRV_MINOR_OSS_DEVICE(minor);
115 switch (minor_unit) {
116 case SNDRV_MINOR_OSS_PCM:
117 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
119 case SNDRV_MINOR_OSS_MIDI:
120 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
122 case SNDRV_MINOR_OSS_MIDI1:
123 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
128 register1 = register_sound_special_device(reg->f_ops, minor, carddev);
129 if (register1 != minor)
132 register2 = register_sound_special_device(reg->f_ops, track2, carddev);
133 if (register2 != track2)
136 up(&sound_oss_mutex);
141 unregister_sound_special(register2);
143 unregister_sound_special(register1);
144 list_del(&preg->list);
145 up(&sound_oss_mutex);
150 int snd_unregister_oss_device(int type, struct snd_card *card, int dev)
152 int minor = snd_oss_kernel_minor(type, card, dev);
153 int cidx = SNDRV_MINOR_OSS_CARD(minor);
155 struct snd_minor *mptr;
159 down(&sound_oss_mutex);
160 mptr = snd_oss_minor_search(minor);
162 up(&sound_oss_mutex);
165 unregister_sound_special(minor);
166 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
167 case SNDRV_MINOR_OSS_PCM:
168 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
170 case SNDRV_MINOR_OSS_MIDI:
171 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
173 case SNDRV_MINOR_OSS_MIDI1:
174 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
178 unregister_sound_special(track2);
179 list_del(&mptr->list);
180 up(&sound_oss_mutex);
189 #ifdef CONFIG_PROC_FS
191 static struct snd_info_entry *snd_minor_info_oss_entry = NULL;
193 static void snd_minor_info_oss_read(struct snd_info_entry *entry,
194 struct snd_info_buffer *buffer)
197 struct list_head *list;
198 struct snd_minor *mptr;
200 down(&sound_oss_mutex);
201 for (card = 0; card < SNDRV_CARDS; card++) {
202 list_for_each(list, &snd_oss_minors_hash[card]) {
203 mptr = list_entry(list, struct snd_minor, list);
204 dev = SNDRV_MINOR_OSS_DEVICE(mptr->number);
205 if (dev != SNDRV_MINOR_OSS_SNDSTAT &&
206 dev != SNDRV_MINOR_OSS_SEQUENCER &&
207 dev != SNDRV_MINOR_OSS_MUSIC)
208 snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", mptr->number, card, dev, mptr->comment);
210 snd_iprintf(buffer, "%3i: : %s\n", mptr->number, mptr->comment);
213 up(&sound_oss_mutex);
216 #endif /* CONFIG_PROC_FS */
218 int __init snd_minor_info_oss_init(void)
220 #ifdef CONFIG_PROC_FS
221 struct snd_info_entry *entry;
223 entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root);
225 entry->c.text.read_size = PAGE_SIZE;
226 entry->c.text.read = snd_minor_info_oss_read;
227 if (snd_info_register(entry) < 0) {
228 snd_info_free_entry(entry);
232 snd_minor_info_oss_entry = entry;
237 int __exit snd_minor_info_oss_done(void)
239 #ifdef CONFIG_PROC_FS
240 if (snd_minor_info_oss_entry)
241 snd_info_unregister(snd_minor_info_oss_entry);
246 int __init snd_oss_init_module(void)
250 for (card = 0; card < SNDRV_CARDS; card++)
251 INIT_LIST_HEAD(&snd_oss_minors_hash[card]);
255 #endif /* CONFIG_SND_OSSEMUL */