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_OSS_MINORS 128
40 static struct snd_minor *snd_oss_minors[SNDRV_OSS_MINORS];
42 static DECLARE_MUTEX(sound_oss_mutex);
44 static int snd_oss_kernel_minor(int type, struct snd_card *card, int dev)
49 case SNDRV_OSS_DEVICE_TYPE_MIXER:
50 snd_assert(card != NULL && dev <= 1, return -EINVAL);
51 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIXER1 : SNDRV_MINOR_OSS_MIXER));
53 case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
54 minor = SNDRV_MINOR_OSS_SEQUENCER;
56 case SNDRV_OSS_DEVICE_TYPE_MUSIC:
57 minor = SNDRV_MINOR_OSS_MUSIC;
59 case SNDRV_OSS_DEVICE_TYPE_PCM:
60 snd_assert(card != NULL && dev <= 1, return -EINVAL);
61 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_PCM1 : SNDRV_MINOR_OSS_PCM));
63 case SNDRV_OSS_DEVICE_TYPE_MIDI:
64 snd_assert(card != NULL && dev <= 1, return -EINVAL);
65 minor = SNDRV_MINOR_OSS(card->number, (dev ? SNDRV_MINOR_OSS_MIDI1 : SNDRV_MINOR_OSS_MIDI));
67 case SNDRV_OSS_DEVICE_TYPE_DMFM:
68 minor = SNDRV_MINOR_OSS(card->number, SNDRV_MINOR_OSS_DMFM);
70 case SNDRV_OSS_DEVICE_TYPE_SNDSTAT:
71 minor = SNDRV_MINOR_OSS_SNDSTAT;
76 snd_assert(minor >= 0 && minor < SNDRV_OSS_MINORS, return -EINVAL);
80 int snd_register_oss_device(int type, struct snd_card *card, int dev,
81 struct file_operations *f_ops, const char *name)
83 int minor = snd_oss_kernel_minor(type, card, dev);
85 struct snd_minor *preg;
86 int cidx = SNDRV_MINOR_OSS_CARD(minor);
88 int register1 = -1, register2 = -1;
89 struct device *carddev = NULL;
93 preg = kmalloc(sizeof(struct snd_minor), GFP_KERNEL);
97 preg->card = card ? card->number : -1;
100 down(&sound_oss_mutex);
101 snd_oss_minors[minor] = preg;
102 minor_unit = SNDRV_MINOR_OSS_DEVICE(minor);
103 switch (minor_unit) {
104 case SNDRV_MINOR_OSS_PCM:
105 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
107 case SNDRV_MINOR_OSS_MIDI:
108 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
110 case SNDRV_MINOR_OSS_MIDI1:
111 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
116 register1 = register_sound_special_device(f_ops, minor, carddev);
117 if (register1 != minor)
120 register2 = register_sound_special_device(f_ops, track2,
122 if (register2 != track2)
125 up(&sound_oss_mutex);
130 unregister_sound_special(register2);
132 unregister_sound_special(register1);
133 snd_oss_minors[minor] = NULL;
134 up(&sound_oss_mutex);
139 int snd_unregister_oss_device(int type, struct snd_card *card, int dev)
141 int minor = snd_oss_kernel_minor(type, card, dev);
142 int cidx = SNDRV_MINOR_OSS_CARD(minor);
144 struct snd_minor *mptr;
148 down(&sound_oss_mutex);
149 mptr = snd_oss_minors[minor];
151 up(&sound_oss_mutex);
154 unregister_sound_special(minor);
155 switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
156 case SNDRV_MINOR_OSS_PCM:
157 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_AUDIO);
159 case SNDRV_MINOR_OSS_MIDI:
160 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI);
162 case SNDRV_MINOR_OSS_MIDI1:
163 track2 = SNDRV_MINOR_OSS(cidx, SNDRV_MINOR_OSS_DMMIDI1);
167 unregister_sound_special(track2);
168 snd_oss_minors[minor] = NULL;
169 up(&sound_oss_mutex);
178 #ifdef CONFIG_PROC_FS
180 static struct snd_info_entry *snd_minor_info_oss_entry = NULL;
182 static const char *snd_oss_device_type_name(int type)
185 case SNDRV_OSS_DEVICE_TYPE_MIXER:
187 case SNDRV_OSS_DEVICE_TYPE_SEQUENCER:
188 case SNDRV_OSS_DEVICE_TYPE_MUSIC:
190 case SNDRV_OSS_DEVICE_TYPE_PCM:
191 return "digital audio";
192 case SNDRV_OSS_DEVICE_TYPE_MIDI:
194 case SNDRV_OSS_DEVICE_TYPE_DMFM:
195 return "hardware dependent";
201 static void snd_minor_info_oss_read(struct snd_info_entry *entry,
202 struct snd_info_buffer *buffer)
205 struct snd_minor *mptr;
207 down(&sound_oss_mutex);
208 for (minor = 0; minor < SNDRV_OSS_MINORS; ++minor) {
209 if (!(mptr = snd_oss_minors[minor]))
212 snd_iprintf(buffer, "%3i: [%i-%2i]: %s\n", minor,
213 mptr->card, mptr->device,
214 snd_oss_device_type_name(mptr->type));
216 snd_iprintf(buffer, "%3i: : %s\n", minor,
217 snd_oss_device_type_name(mptr->type));
219 up(&sound_oss_mutex);
222 #endif /* CONFIG_PROC_FS */
224 int __init snd_minor_info_oss_init(void)
226 #ifdef CONFIG_PROC_FS
227 struct snd_info_entry *entry;
229 entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root);
231 entry->c.text.read_size = PAGE_SIZE;
232 entry->c.text.read = snd_minor_info_oss_read;
233 if (snd_info_register(entry) < 0) {
234 snd_info_free_entry(entry);
238 snd_minor_info_oss_entry = entry;
243 int __exit snd_minor_info_oss_done(void)
245 #ifdef CONFIG_PROC_FS
246 if (snd_minor_info_oss_entry)
247 snd_info_unregister(snd_minor_info_oss_entry);
252 #endif /* CONFIG_SND_OSSEMUL */