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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * OSS emulation layer for the mixer interface
4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
5 */
6
7#include <linux/init.h>
8#include <linux/slab.h>
9#include <linux/time.h>
10#include <linux/string.h>
11#include <linux/module.h>
12#include <linux/compat.h>
13#include <sound/core.h>
14#include <sound/minors.h>
15#include <sound/control.h>
16#include <sound/info.h>
17#include <sound/mixer_oss.h>
18#include <linux/soundcard.h>
19
20#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
21
22MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
23MODULE_DESCRIPTION("Mixer OSS emulation for ALSA.");
24MODULE_LICENSE("GPL");
25MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MIXER);
26
27static int snd_mixer_oss_open(struct inode *inode, struct file *file)
28{
29 struct snd_card *card;
30 struct snd_mixer_oss_file *fmixer;
31 int err;
32
33 err = nonseekable_open(inode, file);
34 if (err < 0)
35 return err;
36
37 card = snd_lookup_oss_minor_data(iminor(inode),
38 SNDRV_OSS_DEVICE_TYPE_MIXER);
39 if (card == NULL)
40 return -ENODEV;
41 if (card->mixer_oss == NULL) {
42 snd_card_unref(card);
43 return -ENODEV;
44 }
45 err = snd_card_file_add(card, file);
46 if (err < 0) {
47 snd_card_unref(card);
48 return err;
49 }
50 fmixer = kzalloc(sizeof(*fmixer), GFP_KERNEL);
51 if (fmixer == NULL) {
52 snd_card_file_remove(card, file);
53 snd_card_unref(card);
54 return -ENOMEM;
55 }
56 fmixer->card = card;
57 fmixer->mixer = card->mixer_oss;
58 file->private_data = fmixer;
59 if (!try_module_get(card->module)) {
60 kfree(fmixer);
61 snd_card_file_remove(card, file);
62 snd_card_unref(card);
63 return -EFAULT;
64 }
65 snd_card_unref(card);
66 return 0;
67}
68
69static int snd_mixer_oss_release(struct inode *inode, struct file *file)
70{
71 struct snd_mixer_oss_file *fmixer;
72
73 if (file->private_data) {
74 fmixer = file->private_data;
75 module_put(fmixer->card->module);
76 snd_card_file_remove(fmixer->card, file);
77 kfree(fmixer);
78 }
79 return 0;
80}
81
82static int snd_mixer_oss_info(struct snd_mixer_oss_file *fmixer,
83 mixer_info __user *_info)
84{
85 struct snd_card *card = fmixer->card;
86 struct snd_mixer_oss *mixer = fmixer->mixer;
87 struct mixer_info info;
88
89 memset(&info, 0, sizeof(info));
90 strlcpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));
91 strlcpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));
92 info.modify_counter = card->mixer_oss_change_count;
93 if (copy_to_user(_info, &info, sizeof(info)))
94 return -EFAULT;
95 return 0;
96}
97
98static int snd_mixer_oss_info_obsolete(struct snd_mixer_oss_file *fmixer,
99 _old_mixer_info __user *_info)
100{
101 struct snd_card *card = fmixer->card;
102 struct snd_mixer_oss *mixer = fmixer->mixer;
103 _old_mixer_info info;
104
105 memset(&info, 0, sizeof(info));
106 strlcpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));
107 strlcpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));
108 if (copy_to_user(_info, &info, sizeof(info)))
109 return -EFAULT;
110 return 0;
111}
112
113static int snd_mixer_oss_caps(struct snd_mixer_oss_file *fmixer)
114{
115 struct snd_mixer_oss *mixer = fmixer->mixer;
116 int result = 0;
117
118 if (mixer == NULL)
119 return -EIO;
120 if (mixer->get_recsrc && mixer->put_recsrc)
121 result |= SOUND_CAP_EXCL_INPUT;
122 return result;
123}
124
125static int snd_mixer_oss_devmask(struct snd_mixer_oss_file *fmixer)
126{
127 struct snd_mixer_oss *mixer = fmixer->mixer;
128 struct snd_mixer_oss_slot *pslot;
129 int result = 0, chn;
130
131 if (mixer == NULL)
132 return -EIO;
133 for (chn = 0; chn < 31; chn++) {
134 pslot = &mixer->slots[chn];
135 if (pslot->put_volume || pslot->put_recsrc)
136 result |= 1 << chn;
137 }
138 return result;
139}
140
141static int snd_mixer_oss_stereodevs(struct snd_mixer_oss_file *fmixer)
142{
143 struct snd_mixer_oss *mixer = fmixer->mixer;
144 struct snd_mixer_oss_slot *pslot;
145 int result = 0, chn;
146
147 if (mixer == NULL)
148 return -EIO;
149 for (chn = 0; chn < 31; chn++) {
150 pslot = &mixer->slots[chn];
151 if (pslot->put_volume && pslot->stereo)
152 result |= 1 << chn;
153 }
154 return result;
155}
156
157static int snd_mixer_oss_recmask(struct snd_mixer_oss_file *fmixer)
158{
159 struct snd_mixer_oss *mixer = fmixer->mixer;
160 int result = 0;
161
162 if (mixer == NULL)
163 return -EIO;
164 if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */
165 result = mixer->mask_recsrc;
166 } else {
167 struct snd_mixer_oss_slot *pslot;
168 int chn;
169 for (chn = 0; chn < 31; chn++) {
170 pslot = &mixer->slots[chn];
171 if (pslot->put_recsrc)
172 result |= 1 << chn;
173 }
174 }
175 return result;
176}
177
178static int snd_mixer_oss_get_recsrc(struct snd_mixer_oss_file *fmixer)
179{
180 struct snd_mixer_oss *mixer = fmixer->mixer;
181 int result = 0;
182
183 if (mixer == NULL)
184 return -EIO;
185 if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */
186 int err;
187 unsigned int index;
188 if ((err = mixer->get_recsrc(fmixer, &index)) < 0)
189 return err;
190 result = 1 << index;
191 } else {
192 struct snd_mixer_oss_slot *pslot;
193 int chn;
194 for (chn = 0; chn < 31; chn++) {
195 pslot = &mixer->slots[chn];
196 if (pslot->get_recsrc) {
197 int active = 0;
198 pslot->get_recsrc(fmixer, pslot, &active);
199 if (active)
200 result |= 1 << chn;
201 }
202 }
203 }
204 return mixer->oss_recsrc = result;
205}
206
207static int snd_mixer_oss_set_recsrc(struct snd_mixer_oss_file *fmixer, int recsrc)
208{
209 struct snd_mixer_oss *mixer = fmixer->mixer;
210 struct snd_mixer_oss_slot *pslot;
211 int chn, active;
212 unsigned int index;
213 int result = 0;
214
215 if (mixer == NULL)
216 return -EIO;
217 if (mixer->get_recsrc && mixer->put_recsrc) { /* exclusive input */
218 if (recsrc & ~mixer->oss_recsrc)
219 recsrc &= ~mixer->oss_recsrc;
220 mixer->put_recsrc(fmixer, ffz(~recsrc));
221 mixer->get_recsrc(fmixer, &index);
222 result = 1 << index;
223 }
224 for (chn = 0; chn < 31; chn++) {
225 pslot = &mixer->slots[chn];
226 if (pslot->put_recsrc) {
227 active = (recsrc & (1 << chn)) ? 1 : 0;
228 pslot->put_recsrc(fmixer, pslot, active);
229 }
230 }
231 if (! result) {
232 for (chn = 0; chn < 31; chn++) {
233 pslot = &mixer->slots[chn];
234 if (pslot->get_recsrc) {
235 active = 0;
236 pslot->get_recsrc(fmixer, pslot, &active);
237 if (active)
238 result |= 1 << chn;
239 }
240 }
241 }
242 return result;
243}
244
245static int snd_mixer_oss_get_volume(struct snd_mixer_oss_file *fmixer, int slot)
246{
247 struct snd_mixer_oss *mixer = fmixer->mixer;
248 struct snd_mixer_oss_slot *pslot;
249 int result = 0, left, right;
250
251 if (mixer == NULL || slot > 30)
252 return -EIO;
253 pslot = &mixer->slots[slot];
254 left = pslot->volume[0];
255 right = pslot->volume[1];
256 if (pslot->get_volume)
257 result = pslot->get_volume(fmixer, pslot, &left, &right);
258 if (!pslot->stereo)
259 right = left;
260 if (snd_BUG_ON(left < 0 || left > 100))
261 return -EIO;
262 if (snd_BUG_ON(right < 0 || right > 100))
263 return -EIO;
264 if (result >= 0) {
265 pslot->volume[0] = left;
266 pslot->volume[1] = right;
267 result = (left & 0xff) | ((right & 0xff) << 8);
268 }
269 return result;
270}
271
272static int snd_mixer_oss_set_volume(struct snd_mixer_oss_file *fmixer,
273 int slot, int volume)
274{
275 struct snd_mixer_oss *mixer = fmixer->mixer;
276 struct snd_mixer_oss_slot *pslot;
277 int result = 0, left = volume & 0xff, right = (volume >> 8) & 0xff;
278
279 if (mixer == NULL || slot > 30)
280 return -EIO;
281 pslot = &mixer->slots[slot];
282 if (left > 100)
283 left = 100;
284 if (right > 100)
285 right = 100;
286 if (!pslot->stereo)
287 right = left;
288 if (pslot->put_volume)
289 result = pslot->put_volume(fmixer, pslot, left, right);
290 if (result < 0)
291 return result;
292 pslot->volume[0] = left;
293 pslot->volume[1] = right;
294 return (left & 0xff) | ((right & 0xff) << 8);
295}
296
297static int snd_mixer_oss_ioctl1(struct snd_mixer_oss_file *fmixer, unsigned int cmd, unsigned long arg)
298{
299 void __user *argp = (void __user *)arg;
300 int __user *p = argp;
301 int tmp;
302
303 if (snd_BUG_ON(!fmixer))
304 return -ENXIO;
305 if (((cmd >> 8) & 0xff) == 'M') {
306 switch (cmd) {
307 case SOUND_MIXER_INFO:
308 return snd_mixer_oss_info(fmixer, argp);
309 case SOUND_OLD_MIXER_INFO:
310 return snd_mixer_oss_info_obsolete(fmixer, argp);
311 case SOUND_MIXER_WRITE_RECSRC:
312 if (get_user(tmp, p))
313 return -EFAULT;
314 tmp = snd_mixer_oss_set_recsrc(fmixer, tmp);
315 if (tmp < 0)
316 return tmp;
317 return put_user(tmp, p);
318 case OSS_GETVERSION:
319 return put_user(SNDRV_OSS_VERSION, p);
320 case OSS_ALSAEMULVER:
321 return put_user(1, p);
322 case SOUND_MIXER_READ_DEVMASK:
323 tmp = snd_mixer_oss_devmask(fmixer);
324 if (tmp < 0)
325 return tmp;
326 return put_user(tmp, p);
327 case SOUND_MIXER_READ_STEREODEVS:
328 tmp = snd_mixer_oss_stereodevs(fmixer);
329 if (tmp < 0)
330 return tmp;
331 return put_user(tmp, p);
332 case SOUND_MIXER_READ_RECMASK:
333 tmp = snd_mixer_oss_recmask(fmixer);
334 if (tmp < 0)
335 return tmp;
336 return put_user(tmp, p);
337 case SOUND_MIXER_READ_CAPS:
338 tmp = snd_mixer_oss_caps(fmixer);
339 if (tmp < 0)
340 return tmp;
341 return put_user(tmp, p);
342 case SOUND_MIXER_READ_RECSRC:
343 tmp = snd_mixer_oss_get_recsrc(fmixer);
344 if (tmp < 0)
345 return tmp;
346 return put_user(tmp, p);
347 }
348 }
349 if (cmd & SIOC_IN) {
350 if (get_user(tmp, p))
351 return -EFAULT;
352 tmp = snd_mixer_oss_set_volume(fmixer, cmd & 0xff, tmp);
353 if (tmp < 0)
354 return tmp;
355 return put_user(tmp, p);
356 } else if (cmd & SIOC_OUT) {
357 tmp = snd_mixer_oss_get_volume(fmixer, cmd & 0xff);
358 if (tmp < 0)
359 return tmp;
360 return put_user(tmp, p);
361 }
362 return -ENXIO;
363}
364
365static long snd_mixer_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
366{
367 return snd_mixer_oss_ioctl1(file->private_data, cmd, arg);
368}
369
370int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg)
371{
372 struct snd_mixer_oss_file fmixer;
373
374 if (snd_BUG_ON(!card))
375 return -ENXIO;
376 if (card->mixer_oss == NULL)
377 return -ENXIO;
378 memset(&fmixer, 0, sizeof(fmixer));
379 fmixer.card = card;
380 fmixer.mixer = card->mixer_oss;
381 return snd_mixer_oss_ioctl1(&fmixer, cmd, arg);
382}
383EXPORT_SYMBOL(snd_mixer_oss_ioctl_card);
384
385#ifdef CONFIG_COMPAT
386/* all compatible */
387static long snd_mixer_oss_ioctl_compat(struct file *file, unsigned int cmd,
388 unsigned long arg)
389{
390 return snd_mixer_oss_ioctl1(file->private_data, cmd,
391 (unsigned long)compat_ptr(arg));
392}
393#else
394#define snd_mixer_oss_ioctl_compat NULL
395#endif
396
397/*
398 * REGISTRATION PART
399 */
400
401static const struct file_operations snd_mixer_oss_f_ops =
402{
403 .owner = THIS_MODULE,
404 .open = snd_mixer_oss_open,
405 .release = snd_mixer_oss_release,
406 .llseek = no_llseek,
407 .unlocked_ioctl = snd_mixer_oss_ioctl,
408 .compat_ioctl = snd_mixer_oss_ioctl_compat,
409};
410
411/*
412 * utilities
413 */
414
415static long snd_mixer_oss_conv(long val, long omin, long omax, long nmin, long nmax)
416{
417 long orange = omax - omin, nrange = nmax - nmin;
418
419 if (orange == 0)
420 return 0;
421 return ((nrange * (val - omin)) + (orange / 2)) / orange + nmin;
422}
423
424/* convert from alsa native to oss values (0-100) */
425static long snd_mixer_oss_conv1(long val, long min, long max, int *old)
426{
427 if (val == snd_mixer_oss_conv(*old, 0, 100, min, max))
428 return *old;
429 return snd_mixer_oss_conv(val, min, max, 0, 100);
430}
431
432/* convert from oss to alsa native values */
433static long snd_mixer_oss_conv2(long val, long min, long max)
434{
435 return snd_mixer_oss_conv(val, 0, 100, min, max);
436}
437
438#if 0
439static void snd_mixer_oss_recsrce_set(struct snd_card *card, int slot)
440{
441 struct snd_mixer_oss *mixer = card->mixer_oss;
442 if (mixer)
443 mixer->mask_recsrc |= 1 << slot;
444}
445
446static int snd_mixer_oss_recsrce_get(struct snd_card *card, int slot)
447{
448 struct snd_mixer_oss *mixer = card->mixer_oss;
449 if (mixer && (mixer->mask_recsrc & (1 << slot)))
450 return 1;
451 return 0;
452}
453#endif
454
455#define SNDRV_MIXER_OSS_SIGNATURE 0x65999250
456
457#define SNDRV_MIXER_OSS_ITEM_GLOBAL 0
458#define SNDRV_MIXER_OSS_ITEM_GSWITCH 1
459#define SNDRV_MIXER_OSS_ITEM_GROUTE 2
460#define SNDRV_MIXER_OSS_ITEM_GVOLUME 3
461#define SNDRV_MIXER_OSS_ITEM_PSWITCH 4
462#define SNDRV_MIXER_OSS_ITEM_PROUTE 5
463#define SNDRV_MIXER_OSS_ITEM_PVOLUME 6
464#define SNDRV_MIXER_OSS_ITEM_CSWITCH 7
465#define SNDRV_MIXER_OSS_ITEM_CROUTE 8
466#define SNDRV_MIXER_OSS_ITEM_CVOLUME 9
467#define SNDRV_MIXER_OSS_ITEM_CAPTURE 10
468
469#define SNDRV_MIXER_OSS_ITEM_COUNT 11
470
471#define SNDRV_MIXER_OSS_PRESENT_GLOBAL (1<<0)
472#define SNDRV_MIXER_OSS_PRESENT_GSWITCH (1<<1)
473#define SNDRV_MIXER_OSS_PRESENT_GROUTE (1<<2)
474#define SNDRV_MIXER_OSS_PRESENT_GVOLUME (1<<3)
475#define SNDRV_MIXER_OSS_PRESENT_PSWITCH (1<<4)
476#define SNDRV_MIXER_OSS_PRESENT_PROUTE (1<<5)
477#define SNDRV_MIXER_OSS_PRESENT_PVOLUME (1<<6)
478#define SNDRV_MIXER_OSS_PRESENT_CSWITCH (1<<7)
479#define SNDRV_MIXER_OSS_PRESENT_CROUTE (1<<8)
480#define SNDRV_MIXER_OSS_PRESENT_CVOLUME (1<<9)
481#define SNDRV_MIXER_OSS_PRESENT_CAPTURE (1<<10)
482
483struct slot {
484 unsigned int signature;
485 unsigned int present;
486 unsigned int channels;
487 unsigned int numid[SNDRV_MIXER_OSS_ITEM_COUNT];
488 unsigned int capture_item;
489 const struct snd_mixer_oss_assign_table *assigned;
490 unsigned int allocated: 1;
491};
492
493#define ID_UNKNOWN ((unsigned int)-1)
494
495static struct snd_kcontrol *snd_mixer_oss_test_id(struct snd_mixer_oss *mixer, const char *name, int index)
496{
497 struct snd_card *card = mixer->card;
498 struct snd_ctl_elem_id id;
499
500 memset(&id, 0, sizeof(id));
501 id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
502 strlcpy(id.name, name, sizeof(id.name));
503 id.index = index;
504 return snd_ctl_find_id(card, &id);
505}
506
507static void snd_mixer_oss_get_volume1_vol(struct snd_mixer_oss_file *fmixer,
508 struct snd_mixer_oss_slot *pslot,
509 unsigned int numid,
510 int *left, int *right)
511{
512 struct snd_ctl_elem_info *uinfo;
513 struct snd_ctl_elem_value *uctl;
514 struct snd_kcontrol *kctl;
515 struct snd_card *card = fmixer->card;
516
517 if (numid == ID_UNKNOWN)
518 return;
519 down_read(&card->controls_rwsem);
520 if ((kctl = snd_ctl_find_numid(card, numid)) == NULL) {
521 up_read(&card->controls_rwsem);
522 return;
523 }
524 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
525 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
526 if (uinfo == NULL || uctl == NULL)
527 goto __unalloc;
528 if (kctl->info(kctl, uinfo))
529 goto __unalloc;
530 if (kctl->get(kctl, uctl))
531 goto __unalloc;
532 if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
533 uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
534 goto __unalloc;
535 *left = snd_mixer_oss_conv1(uctl->value.integer.value[0], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[0]);
536 if (uinfo->count > 1)
537 *right = snd_mixer_oss_conv1(uctl->value.integer.value[1], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[1]);
538 __unalloc:
539 up_read(&card->controls_rwsem);
540 kfree(uctl);
541 kfree(uinfo);
542}
543
544static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer,
545 struct snd_mixer_oss_slot *pslot,
546 unsigned int numid,
547 int *left, int *right,
548 int route)
549{
550 struct snd_ctl_elem_info *uinfo;
551 struct snd_ctl_elem_value *uctl;
552 struct snd_kcontrol *kctl;
553 struct snd_card *card = fmixer->card;
554
555 if (numid == ID_UNKNOWN)
556 return;
557 down_read(&card->controls_rwsem);
558 if ((kctl = snd_ctl_find_numid(card, numid)) == NULL) {
559 up_read(&card->controls_rwsem);
560 return;
561 }
562 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
563 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
564 if (uinfo == NULL || uctl == NULL)
565 goto __unalloc;
566 if (kctl->info(kctl, uinfo))
567 goto __unalloc;
568 if (kctl->get(kctl, uctl))
569 goto __unalloc;
570 if (!uctl->value.integer.value[0]) {
571 *left = 0;
572 if (uinfo->count == 1)
573 *right = 0;
574 }
575 if (uinfo->count > 1 && !uctl->value.integer.value[route ? 3 : 1])
576 *right = 0;
577 __unalloc:
578 up_read(&card->controls_rwsem);
579 kfree(uctl);
580 kfree(uinfo);
581}
582
583static int snd_mixer_oss_get_volume1(struct snd_mixer_oss_file *fmixer,
584 struct snd_mixer_oss_slot *pslot,
585 int *left, int *right)
586{
587 struct slot *slot = pslot->private_data;
588
589 *left = *right = 100;
590 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
591 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
592 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
593 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
594 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
595 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
596 }
597 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
598 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
599 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
600 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
601 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
602 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
603 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
604 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
605 }
606 return 0;
607}
608
609static void snd_mixer_oss_put_volume1_vol(struct snd_mixer_oss_file *fmixer,
610 struct snd_mixer_oss_slot *pslot,
611 unsigned int numid,
612 int left, int right)
613{
614 struct snd_ctl_elem_info *uinfo;
615 struct snd_ctl_elem_value *uctl;
616 struct snd_kcontrol *kctl;
617 struct snd_card *card = fmixer->card;
618 int res;
619
620 if (numid == ID_UNKNOWN)
621 return;
622 down_read(&card->controls_rwsem);
623 if ((kctl = snd_ctl_find_numid(card, numid)) == NULL) {
624 up_read(&card->controls_rwsem);
625 return;
626 }
627 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
628 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
629 if (uinfo == NULL || uctl == NULL)
630 goto __unalloc;
631 if (kctl->info(kctl, uinfo))
632 goto __unalloc;
633 if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
634 uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
635 goto __unalloc;
636 uctl->value.integer.value[0] = snd_mixer_oss_conv2(left, uinfo->value.integer.min, uinfo->value.integer.max);
637 if (uinfo->count > 1)
638 uctl->value.integer.value[1] = snd_mixer_oss_conv2(right, uinfo->value.integer.min, uinfo->value.integer.max);
639 if ((res = kctl->put(kctl, uctl)) < 0)
640 goto __unalloc;
641 if (res > 0)
642 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
643 __unalloc:
644 up_read(&card->controls_rwsem);
645 kfree(uctl);
646 kfree(uinfo);
647}
648
649static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer,
650 struct snd_mixer_oss_slot *pslot,
651 unsigned int numid,
652 int left, int right,
653 int route)
654{
655 struct snd_ctl_elem_info *uinfo;
656 struct snd_ctl_elem_value *uctl;
657 struct snd_kcontrol *kctl;
658 struct snd_card *card = fmixer->card;
659 int res;
660
661 if (numid == ID_UNKNOWN)
662 return;
663 down_read(&card->controls_rwsem);
664 if ((kctl = snd_ctl_find_numid(card, numid)) == NULL) {
665 up_read(&card->controls_rwsem);
666 return;
667 }
668 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
669 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
670 if (uinfo == NULL || uctl == NULL)
671 goto __unalloc;
672 if (kctl->info(kctl, uinfo))
673 goto __unalloc;
674 if (uinfo->count > 1) {
675 uctl->value.integer.value[0] = left > 0 ? 1 : 0;
676 uctl->value.integer.value[route ? 3 : 1] = right > 0 ? 1 : 0;
677 if (route) {
678 uctl->value.integer.value[1] =
679 uctl->value.integer.value[2] = 0;
680 }
681 } else {
682 uctl->value.integer.value[0] = (left > 0 || right > 0) ? 1 : 0;
683 }
684 if ((res = kctl->put(kctl, uctl)) < 0)
685 goto __unalloc;
686 if (res > 0)
687 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
688 __unalloc:
689 up_read(&card->controls_rwsem);
690 kfree(uctl);
691 kfree(uinfo);
692}
693
694static int snd_mixer_oss_put_volume1(struct snd_mixer_oss_file *fmixer,
695 struct snd_mixer_oss_slot *pslot,
696 int left, int right)
697{
698 struct slot *slot = pslot->private_data;
699
700 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
701 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
702 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME)
703 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
704 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) {
705 snd_mixer_oss_put_volume1_vol(fmixer, pslot,
706 slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
707 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
708 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
709 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
710 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
711 }
712 if (left || right) {
713 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH)
714 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
715 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH)
716 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
717 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH)
718 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
719 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE)
720 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
721 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE)
722 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
723 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE)
724 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
725 } else {
726 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
727 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
728 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
729 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
730 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
731 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
732 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
733 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
734 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
735 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
736 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
737 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
738 }
739 }
740 return 0;
741}
742
743static int snd_mixer_oss_get_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
744 struct snd_mixer_oss_slot *pslot,
745 int *active)
746{
747 struct slot *slot = pslot->private_data;
748 int left, right;
749
750 left = right = 1;
751 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], &left, &right, 0);
752 *active = (left || right) ? 1 : 0;
753 return 0;
754}
755
756static int snd_mixer_oss_get_recsrc1_route(struct snd_mixer_oss_file *fmixer,
757 struct snd_mixer_oss_slot *pslot,
758 int *active)
759{
760 struct slot *slot = pslot->private_data;
761 int left, right;
762
763 left = right = 1;
764 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], &left, &right, 1);
765 *active = (left || right) ? 1 : 0;
766 return 0;
767}
768
769static int snd_mixer_oss_put_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
770 struct snd_mixer_oss_slot *pslot,
771 int active)
772{
773 struct slot *slot = pslot->private_data;
774
775 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], active, active, 0);
776 return 0;
777}
778
779static int snd_mixer_oss_put_recsrc1_route(struct snd_mixer_oss_file *fmixer,
780 struct snd_mixer_oss_slot *pslot,
781 int active)
782{
783 struct slot *slot = pslot->private_data;
784
785 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], active, active, 1);
786 return 0;
787}
788
789static int snd_mixer_oss_get_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int *active_index)
790{
791 struct snd_card *card = fmixer->card;
792 struct snd_mixer_oss *mixer = fmixer->mixer;
793 struct snd_kcontrol *kctl;
794 struct snd_mixer_oss_slot *pslot;
795 struct slot *slot;
796 struct snd_ctl_elem_info *uinfo;
797 struct snd_ctl_elem_value *uctl;
798 int err, idx;
799
800 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
801 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
802 if (uinfo == NULL || uctl == NULL) {
803 err = -ENOMEM;
804 goto __free_only;
805 }
806 down_read(&card->controls_rwsem);
807 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
808 if (! kctl) {
809 err = -ENOENT;
810 goto __unlock;
811 }
812 if ((err = kctl->info(kctl, uinfo)) < 0)
813 goto __unlock;
814 if ((err = kctl->get(kctl, uctl)) < 0)
815 goto __unlock;
816 for (idx = 0; idx < 32; idx++) {
817 if (!(mixer->mask_recsrc & (1 << idx)))
818 continue;
819 pslot = &mixer->slots[idx];
820 slot = pslot->private_data;
821 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
822 continue;
823 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
824 continue;
825 if (slot->capture_item == uctl->value.enumerated.item[0]) {
826 *active_index = idx;
827 break;
828 }
829 }
830 err = 0;
831 __unlock:
832 up_read(&card->controls_rwsem);
833 __free_only:
834 kfree(uctl);
835 kfree(uinfo);
836 return err;
837}
838
839static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int active_index)
840{
841 struct snd_card *card = fmixer->card;
842 struct snd_mixer_oss *mixer = fmixer->mixer;
843 struct snd_kcontrol *kctl;
844 struct snd_mixer_oss_slot *pslot;
845 struct slot *slot = NULL;
846 struct snd_ctl_elem_info *uinfo;
847 struct snd_ctl_elem_value *uctl;
848 int err;
849 unsigned int idx;
850
851 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
852 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
853 if (uinfo == NULL || uctl == NULL) {
854 err = -ENOMEM;
855 goto __free_only;
856 }
857 down_read(&card->controls_rwsem);
858 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
859 if (! kctl) {
860 err = -ENOENT;
861 goto __unlock;
862 }
863 if ((err = kctl->info(kctl, uinfo)) < 0)
864 goto __unlock;
865 for (idx = 0; idx < 32; idx++) {
866 if (!(mixer->mask_recsrc & (1 << idx)))
867 continue;
868 pslot = &mixer->slots[idx];
869 slot = pslot->private_data;
870 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
871 continue;
872 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
873 continue;
874 if (idx == active_index)
875 break;
876 slot = NULL;
877 }
878 if (! slot)
879 goto __unlock;
880 for (idx = 0; idx < uinfo->count; idx++)
881 uctl->value.enumerated.item[idx] = slot->capture_item;
882 err = kctl->put(kctl, uctl);
883 if (err > 0)
884 snd_ctl_notify(fmixer->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
885 err = 0;
886 __unlock:
887 up_read(&card->controls_rwsem);
888 __free_only:
889 kfree(uctl);
890 kfree(uinfo);
891 return err;
892}
893
894struct snd_mixer_oss_assign_table {
895 int oss_id;
896 const char *name;
897 int index;
898};
899
900static int snd_mixer_oss_build_test(struct snd_mixer_oss *mixer, struct slot *slot, const char *name, int index, int item)
901{
902 struct snd_ctl_elem_info *info;
903 struct snd_kcontrol *kcontrol;
904 struct snd_card *card = mixer->card;
905 int err;
906
907 down_read(&card->controls_rwsem);
908 kcontrol = snd_mixer_oss_test_id(mixer, name, index);
909 if (kcontrol == NULL) {
910 up_read(&card->controls_rwsem);
911 return 0;
912 }
913 info = kmalloc(sizeof(*info), GFP_KERNEL);
914 if (! info) {
915 up_read(&card->controls_rwsem);
916 return -ENOMEM;
917 }
918 if ((err = kcontrol->info(kcontrol, info)) < 0) {
919 up_read(&card->controls_rwsem);
920 kfree(info);
921 return err;
922 }
923 slot->numid[item] = kcontrol->id.numid;
924 up_read(&card->controls_rwsem);
925 if (info->count > slot->channels)
926 slot->channels = info->count;
927 slot->present |= 1 << item;
928 kfree(info);
929 return 0;
930}
931
932static void snd_mixer_oss_slot_free(struct snd_mixer_oss_slot *chn)
933{
934 struct slot *p = chn->private_data;
935 if (p) {
936 if (p->allocated && p->assigned) {
937 kfree_const(p->assigned->name);
938 kfree_const(p->assigned);
939 }
940 kfree(p);
941 }
942}
943
944static void mixer_slot_clear(struct snd_mixer_oss_slot *rslot)
945{
946 int idx = rslot->number; /* remember this */
947 if (rslot->private_free)
948 rslot->private_free(rslot);
949 memset(rslot, 0, sizeof(*rslot));
950 rslot->number = idx;
951}
952
953/* In a separate function to keep gcc 3.2 happy - do NOT merge this in
954 snd_mixer_oss_build_input! */
955static int snd_mixer_oss_build_test_all(struct snd_mixer_oss *mixer,
956 const struct snd_mixer_oss_assign_table *ptr,
957 struct slot *slot)
958{
959 char str[64];
960 int err;
961
962 err = snd_mixer_oss_build_test(mixer, slot, ptr->name, ptr->index,
963 SNDRV_MIXER_OSS_ITEM_GLOBAL);
964 if (err)
965 return err;
966 sprintf(str, "%s Switch", ptr->name);
967 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
968 SNDRV_MIXER_OSS_ITEM_GSWITCH);
969 if (err)
970 return err;
971 sprintf(str, "%s Route", ptr->name);
972 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
973 SNDRV_MIXER_OSS_ITEM_GROUTE);
974 if (err)
975 return err;
976 sprintf(str, "%s Volume", ptr->name);
977 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
978 SNDRV_MIXER_OSS_ITEM_GVOLUME);
979 if (err)
980 return err;
981 sprintf(str, "%s Playback Switch", ptr->name);
982 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
983 SNDRV_MIXER_OSS_ITEM_PSWITCH);
984 if (err)
985 return err;
986 sprintf(str, "%s Playback Route", ptr->name);
987 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
988 SNDRV_MIXER_OSS_ITEM_PROUTE);
989 if (err)
990 return err;
991 sprintf(str, "%s Playback Volume", ptr->name);
992 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
993 SNDRV_MIXER_OSS_ITEM_PVOLUME);
994 if (err)
995 return err;
996 sprintf(str, "%s Capture Switch", ptr->name);
997 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
998 SNDRV_MIXER_OSS_ITEM_CSWITCH);
999 if (err)
1000 return err;
1001 sprintf(str, "%s Capture Route", ptr->name);
1002 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1003 SNDRV_MIXER_OSS_ITEM_CROUTE);
1004 if (err)
1005 return err;
1006 sprintf(str, "%s Capture Volume", ptr->name);
1007 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1008 SNDRV_MIXER_OSS_ITEM_CVOLUME);
1009 if (err)
1010 return err;
1011
1012 return 0;
1013}
1014
1015/*
1016 * build an OSS mixer element.
1017 * ptr_allocated means the entry is dynamically allocated (change via proc file).
1018 * when replace_old = 1, the old entry is replaced with the new one.
1019 */
1020static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer,
1021 const struct snd_mixer_oss_assign_table *ptr,
1022 int ptr_allocated, int replace_old)
1023{
1024 struct slot slot;
1025 struct slot *pslot;
1026 struct snd_kcontrol *kctl;
1027 struct snd_mixer_oss_slot *rslot;
1028 char str[64];
1029
1030 /* check if already assigned */
1031 if (mixer->slots[ptr->oss_id].get_volume && ! replace_old)
1032 return 0;
1033
1034 memset(&slot, 0, sizeof(slot));
1035 memset(slot.numid, 0xff, sizeof(slot.numid)); /* ID_UNKNOWN */
1036 if (snd_mixer_oss_build_test_all(mixer, ptr, &slot))
1037 return 0;
1038 down_read(&mixer->card->controls_rwsem);
1039 if (ptr->index == 0 && (kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0)) != NULL) {
1040 struct snd_ctl_elem_info *uinfo;
1041
1042 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
1043 if (! uinfo) {
1044 up_read(&mixer->card->controls_rwsem);
1045 return -ENOMEM;
1046 }
1047
1048 if (kctl->info(kctl, uinfo)) {
1049 up_read(&mixer->card->controls_rwsem);
1050 kfree(uinfo);
1051 return 0;
1052 }
1053 strcpy(str, ptr->name);
1054 if (!strcmp(str, "Master"))
1055 strcpy(str, "Mix");
1056 if (!strcmp(str, "Master Mono"))
1057 strcpy(str, "Mix Mono");
1058 slot.capture_item = 0;
1059 if (!strcmp(uinfo->value.enumerated.name, str)) {
1060 slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1061 } else {
1062 for (slot.capture_item = 1; slot.capture_item < uinfo->value.enumerated.items; slot.capture_item++) {
1063 uinfo->value.enumerated.item = slot.capture_item;
1064 if (kctl->info(kctl, uinfo)) {
1065 up_read(&mixer->card->controls_rwsem);
1066 kfree(uinfo);
1067 return 0;
1068 }
1069 if (!strcmp(uinfo->value.enumerated.name, str)) {
1070 slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1071 break;
1072 }
1073 }
1074 }
1075 kfree(uinfo);
1076 }
1077 up_read(&mixer->card->controls_rwsem);
1078 if (slot.present != 0) {
1079 pslot = kmalloc(sizeof(slot), GFP_KERNEL);
1080 if (! pslot)
1081 return -ENOMEM;
1082 *pslot = slot;
1083 pslot->signature = SNDRV_MIXER_OSS_SIGNATURE;
1084 pslot->assigned = ptr;
1085 pslot->allocated = ptr_allocated;
1086 rslot = &mixer->slots[ptr->oss_id];
1087 mixer_slot_clear(rslot);
1088 rslot->stereo = slot.channels > 1 ? 1 : 0;
1089 rslot->get_volume = snd_mixer_oss_get_volume1;
1090 rslot->put_volume = snd_mixer_oss_put_volume1;
1091 /* note: ES18xx have both Capture Source and XX Capture Volume !!! */
1092 if (slot.present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
1093 rslot->get_recsrc = snd_mixer_oss_get_recsrc1_sw;
1094 rslot->put_recsrc = snd_mixer_oss_put_recsrc1_sw;
1095 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
1096 rslot->get_recsrc = snd_mixer_oss_get_recsrc1_route;
1097 rslot->put_recsrc = snd_mixer_oss_put_recsrc1_route;
1098 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CAPTURE) {
1099 mixer->mask_recsrc |= 1 << ptr->oss_id;
1100 }
1101 rslot->private_data = pslot;
1102 rslot->private_free = snd_mixer_oss_slot_free;
1103 return 1;
1104 }
1105 return 0;
1106}
1107
1108#ifdef CONFIG_SND_PROC_FS
1109/*
1110 */
1111#define MIXER_VOL(name) [SOUND_MIXER_##name] = #name
1112static const char * const oss_mixer_names[SNDRV_OSS_MAX_MIXERS] = {
1113 MIXER_VOL(VOLUME),
1114 MIXER_VOL(BASS),
1115 MIXER_VOL(TREBLE),
1116 MIXER_VOL(SYNTH),
1117 MIXER_VOL(PCM),
1118 MIXER_VOL(SPEAKER),
1119 MIXER_VOL(LINE),
1120 MIXER_VOL(MIC),
1121 MIXER_VOL(CD),
1122 MIXER_VOL(IMIX),
1123 MIXER_VOL(ALTPCM),
1124 MIXER_VOL(RECLEV),
1125 MIXER_VOL(IGAIN),
1126 MIXER_VOL(OGAIN),
1127 MIXER_VOL(LINE1),
1128 MIXER_VOL(LINE2),
1129 MIXER_VOL(LINE3),
1130 MIXER_VOL(DIGITAL1),
1131 MIXER_VOL(DIGITAL2),
1132 MIXER_VOL(DIGITAL3),
1133 MIXER_VOL(PHONEIN),
1134 MIXER_VOL(PHONEOUT),
1135 MIXER_VOL(VIDEO),
1136 MIXER_VOL(RADIO),
1137 MIXER_VOL(MONITOR),
1138};
1139
1140/*
1141 * /proc interface
1142 */
1143
1144static void snd_mixer_oss_proc_read(struct snd_info_entry *entry,
1145 struct snd_info_buffer *buffer)
1146{
1147 struct snd_mixer_oss *mixer = entry->private_data;
1148 int i;
1149
1150 mutex_lock(&mixer->reg_mutex);
1151 for (i = 0; i < SNDRV_OSS_MAX_MIXERS; i++) {
1152 struct slot *p;
1153
1154 if (! oss_mixer_names[i])
1155 continue;
1156 p = (struct slot *)mixer->slots[i].private_data;
1157 snd_iprintf(buffer, "%s ", oss_mixer_names[i]);
1158 if (p && p->assigned)
1159 snd_iprintf(buffer, "\"%s\" %d\n",
1160 p->assigned->name,
1161 p->assigned->index);
1162 else
1163 snd_iprintf(buffer, "\"\" 0\n");
1164 }
1165 mutex_unlock(&mixer->reg_mutex);
1166}
1167
1168static void snd_mixer_oss_proc_write(struct snd_info_entry *entry,
1169 struct snd_info_buffer *buffer)
1170{
1171 struct snd_mixer_oss *mixer = entry->private_data;
1172 char line[128], str[32], idxstr[16];
1173 const char *cptr;
1174 unsigned int idx;
1175 int ch;
1176 struct snd_mixer_oss_assign_table *tbl;
1177 struct slot *slot;
1178
1179 while (!snd_info_get_line(buffer, line, sizeof(line))) {
1180 cptr = snd_info_get_str(str, line, sizeof(str));
1181 for (ch = 0; ch < SNDRV_OSS_MAX_MIXERS; ch++)
1182 if (oss_mixer_names[ch] && strcmp(oss_mixer_names[ch], str) == 0)
1183 break;
1184 if (ch >= SNDRV_OSS_MAX_MIXERS) {
1185 pr_err("ALSA: mixer_oss: invalid OSS volume '%s'\n",
1186 str);
1187 continue;
1188 }
1189 cptr = snd_info_get_str(str, cptr, sizeof(str));
1190 if (! *str) {
1191 /* remove the entry */
1192 mutex_lock(&mixer->reg_mutex);
1193 mixer_slot_clear(&mixer->slots[ch]);
1194 mutex_unlock(&mixer->reg_mutex);
1195 continue;
1196 }
1197 snd_info_get_str(idxstr, cptr, sizeof(idxstr));
1198 idx = simple_strtoul(idxstr, NULL, 10);
1199 if (idx >= 0x4000) { /* too big */
1200 pr_err("ALSA: mixer_oss: invalid index %d\n", idx);
1201 continue;
1202 }
1203 mutex_lock(&mixer->reg_mutex);
1204 slot = (struct slot *)mixer->slots[ch].private_data;
1205 if (slot && slot->assigned &&
1206 slot->assigned->index == idx && ! strcmp(slot->assigned->name, str))
1207 /* not changed */
1208 goto __unlock;
1209 tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
1210 if (!tbl)
1211 goto __unlock;
1212 tbl->oss_id = ch;
1213 tbl->name = kstrdup(str, GFP_KERNEL);
1214 if (! tbl->name) {
1215 kfree(tbl);
1216 goto __unlock;
1217 }
1218 tbl->index = idx;
1219 if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) {
1220 kfree(tbl->name);
1221 kfree(tbl);
1222 }
1223 __unlock:
1224 mutex_unlock(&mixer->reg_mutex);
1225 }
1226}
1227
1228static void snd_mixer_oss_proc_init(struct snd_mixer_oss *mixer)
1229{
1230 struct snd_info_entry *entry;
1231
1232 entry = snd_info_create_card_entry(mixer->card, "oss_mixer",
1233 mixer->card->proc_root);
1234 if (! entry)
1235 return;
1236 entry->content = SNDRV_INFO_CONTENT_TEXT;
1237 entry->mode = S_IFREG | 0644;
1238 entry->c.text.read = snd_mixer_oss_proc_read;
1239 entry->c.text.write = snd_mixer_oss_proc_write;
1240 entry->private_data = mixer;
1241 if (snd_info_register(entry) < 0) {
1242 snd_info_free_entry(entry);
1243 entry = NULL;
1244 }
1245 mixer->proc_entry = entry;
1246}
1247
1248static void snd_mixer_oss_proc_done(struct snd_mixer_oss *mixer)
1249{
1250 snd_info_free_entry(mixer->proc_entry);
1251 mixer->proc_entry = NULL;
1252}
1253#else /* !CONFIG_SND_PROC_FS */
1254#define snd_mixer_oss_proc_init(mix)
1255#define snd_mixer_oss_proc_done(mix)
1256#endif /* CONFIG_SND_PROC_FS */
1257
1258static void snd_mixer_oss_build(struct snd_mixer_oss *mixer)
1259{
1260 static const struct snd_mixer_oss_assign_table table[] = {
1261 { SOUND_MIXER_VOLUME, "Master", 0 },
1262 { SOUND_MIXER_VOLUME, "Front", 0 }, /* fallback */
1263 { SOUND_MIXER_BASS, "Tone Control - Bass", 0 },
1264 { SOUND_MIXER_TREBLE, "Tone Control - Treble", 0 },
1265 { SOUND_MIXER_SYNTH, "Synth", 0 },
1266 { SOUND_MIXER_SYNTH, "FM", 0 }, /* fallback */
1267 { SOUND_MIXER_SYNTH, "Music", 0 }, /* fallback */
1268 { SOUND_MIXER_PCM, "PCM", 0 },
1269 { SOUND_MIXER_SPEAKER, "Beep", 0 },
1270 { SOUND_MIXER_SPEAKER, "PC Speaker", 0 }, /* fallback */
1271 { SOUND_MIXER_SPEAKER, "Speaker", 0 }, /* fallback */
1272 { SOUND_MIXER_LINE, "Line", 0 },
1273 { SOUND_MIXER_MIC, "Mic", 0 },
1274 { SOUND_MIXER_CD, "CD", 0 },
1275 { SOUND_MIXER_IMIX, "Monitor Mix", 0 },
1276 { SOUND_MIXER_ALTPCM, "PCM", 1 },
1277 { SOUND_MIXER_ALTPCM, "Headphone", 0 }, /* fallback */
1278 { SOUND_MIXER_ALTPCM, "Wave", 0 }, /* fallback */
1279 { SOUND_MIXER_RECLEV, "-- nothing --", 0 },
1280 { SOUND_MIXER_IGAIN, "Capture", 0 },
1281 { SOUND_MIXER_OGAIN, "Playback", 0 },
1282 { SOUND_MIXER_LINE1, "Aux", 0 },
1283 { SOUND_MIXER_LINE2, "Aux", 1 },
1284 { SOUND_MIXER_LINE3, "Aux", 2 },
1285 { SOUND_MIXER_DIGITAL1, "Digital", 0 },
1286 { SOUND_MIXER_DIGITAL1, "IEC958", 0 }, /* fallback */
1287 { SOUND_MIXER_DIGITAL1, "IEC958 Optical", 0 }, /* fallback */
1288 { SOUND_MIXER_DIGITAL1, "IEC958 Coaxial", 0 }, /* fallback */
1289 { SOUND_MIXER_DIGITAL2, "Digital", 1 },
1290 { SOUND_MIXER_DIGITAL3, "Digital", 2 },
1291 { SOUND_MIXER_PHONEIN, "Phone", 0 },
1292 { SOUND_MIXER_PHONEOUT, "Master Mono", 0 },
1293 { SOUND_MIXER_PHONEOUT, "Speaker", 0 }, /*fallback*/
1294 { SOUND_MIXER_PHONEOUT, "Mono", 0 }, /*fallback*/
1295 { SOUND_MIXER_PHONEOUT, "Phone", 0 }, /* fallback */
1296 { SOUND_MIXER_VIDEO, "Video", 0 },
1297 { SOUND_MIXER_RADIO, "Radio", 0 },
1298 { SOUND_MIXER_MONITOR, "Monitor", 0 }
1299 };
1300 unsigned int idx;
1301
1302 for (idx = 0; idx < ARRAY_SIZE(table); idx++)
1303 snd_mixer_oss_build_input(mixer, &table[idx], 0, 0);
1304 if (mixer->mask_recsrc) {
1305 mixer->get_recsrc = snd_mixer_oss_get_recsrc2;
1306 mixer->put_recsrc = snd_mixer_oss_put_recsrc2;
1307 }
1308}
1309
1310/*
1311 *
1312 */
1313
1314static int snd_mixer_oss_free1(void *private)
1315{
1316 struct snd_mixer_oss *mixer = private;
1317 struct snd_card *card;
1318 int idx;
1319
1320 if (!mixer)
1321 return 0;
1322 card = mixer->card;
1323 if (snd_BUG_ON(mixer != card->mixer_oss))
1324 return -ENXIO;
1325 card->mixer_oss = NULL;
1326 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) {
1327 struct snd_mixer_oss_slot *chn = &mixer->slots[idx];
1328 if (chn->private_free)
1329 chn->private_free(chn);
1330 }
1331 kfree(mixer);
1332 return 0;
1333}
1334
1335static int snd_mixer_oss_notify_handler(struct snd_card *card, int cmd)
1336{
1337 struct snd_mixer_oss *mixer;
1338
1339 if (cmd == SND_MIXER_OSS_NOTIFY_REGISTER) {
1340 int idx, err;
1341
1342 mixer = kcalloc(2, sizeof(*mixer), GFP_KERNEL);
1343 if (mixer == NULL)
1344 return -ENOMEM;
1345 mutex_init(&mixer->reg_mutex);
1346 if ((err = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER,
1347 card, 0,
1348 &snd_mixer_oss_f_ops, card)) < 0) {
1349 dev_err(card->dev,
1350 "unable to register OSS mixer device %i:%i\n",
1351 card->number, 0);
1352 kfree(mixer);
1353 return err;
1354 }
1355 mixer->oss_dev_alloc = 1;
1356 mixer->card = card;
1357 if (*card->mixername)
1358 strlcpy(mixer->name, card->mixername, sizeof(mixer->name));
1359 else
1360 snprintf(mixer->name, sizeof(mixer->name),
1361 "mixer%i", card->number);
1362#ifdef SNDRV_OSS_INFO_DEV_MIXERS
1363 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIXERS,
1364 card->number,
1365 mixer->name);
1366#endif
1367 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++)
1368 mixer->slots[idx].number = idx;
1369 card->mixer_oss = mixer;
1370 snd_mixer_oss_build(mixer);
1371 snd_mixer_oss_proc_init(mixer);
1372 } else {
1373 mixer = card->mixer_oss;
1374 if (mixer == NULL)
1375 return 0;
1376 if (mixer->oss_dev_alloc) {
1377#ifdef SNDRV_OSS_INFO_DEV_MIXERS
1378 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIXERS, mixer->card->number);
1379#endif
1380 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, mixer->card, 0);
1381 mixer->oss_dev_alloc = 0;
1382 }
1383 if (cmd == SND_MIXER_OSS_NOTIFY_DISCONNECT)
1384 return 0;
1385 snd_mixer_oss_proc_done(mixer);
1386 return snd_mixer_oss_free1(mixer);
1387 }
1388 return 0;
1389}
1390
1391static int __init alsa_mixer_oss_init(void)
1392{
1393 struct snd_card *card;
1394 int idx;
1395
1396 snd_mixer_oss_notify_callback = snd_mixer_oss_notify_handler;
1397 for (idx = 0; idx < SNDRV_CARDS; idx++) {
1398 card = snd_card_ref(idx);
1399 if (card) {
1400 snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_REGISTER);
1401 snd_card_unref(card);
1402 }
1403 }
1404 return 0;
1405}
1406
1407static void __exit alsa_mixer_oss_exit(void)
1408{
1409 struct snd_card *card;
1410 int idx;
1411
1412 snd_mixer_oss_notify_callback = NULL;
1413 for (idx = 0; idx < SNDRV_CARDS; idx++) {
1414 card = snd_card_ref(idx);
1415 if (card) {
1416 snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_FREE);
1417 snd_card_unref(card);
1418 }
1419 }
1420}
1421
1422module_init(alsa_mixer_oss_init)
1423module_exit(alsa_mixer_oss_exit)
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * OSS emulation layer for the mixer interface
4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
5 */
6
7#include <linux/init.h>
8#include <linux/slab.h>
9#include <linux/time.h>
10#include <linux/string.h>
11#include <linux/module.h>
12#include <linux/compat.h>
13#include <sound/core.h>
14#include <sound/minors.h>
15#include <sound/control.h>
16#include <sound/info.h>
17#include <sound/mixer_oss.h>
18#include <linux/soundcard.h>
19
20#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
21
22MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
23MODULE_DESCRIPTION("Mixer OSS emulation for ALSA.");
24MODULE_LICENSE("GPL");
25MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MIXER);
26
27static int snd_mixer_oss_open(struct inode *inode, struct file *file)
28{
29 struct snd_card *card;
30 struct snd_mixer_oss_file *fmixer;
31 int err;
32
33 err = nonseekable_open(inode, file);
34 if (err < 0)
35 return err;
36
37 card = snd_lookup_oss_minor_data(iminor(inode),
38 SNDRV_OSS_DEVICE_TYPE_MIXER);
39 if (card == NULL)
40 return -ENODEV;
41 if (card->mixer_oss == NULL) {
42 snd_card_unref(card);
43 return -ENODEV;
44 }
45 err = snd_card_file_add(card, file);
46 if (err < 0) {
47 snd_card_unref(card);
48 return err;
49 }
50 fmixer = kzalloc(sizeof(*fmixer), GFP_KERNEL);
51 if (fmixer == NULL) {
52 snd_card_file_remove(card, file);
53 snd_card_unref(card);
54 return -ENOMEM;
55 }
56 fmixer->card = card;
57 fmixer->mixer = card->mixer_oss;
58 file->private_data = fmixer;
59 if (!try_module_get(card->module)) {
60 kfree(fmixer);
61 snd_card_file_remove(card, file);
62 snd_card_unref(card);
63 return -EFAULT;
64 }
65 snd_card_unref(card);
66 return 0;
67}
68
69static int snd_mixer_oss_release(struct inode *inode, struct file *file)
70{
71 struct snd_mixer_oss_file *fmixer;
72
73 if (file->private_data) {
74 fmixer = file->private_data;
75 module_put(fmixer->card->module);
76 snd_card_file_remove(fmixer->card, file);
77 kfree(fmixer);
78 }
79 return 0;
80}
81
82static int snd_mixer_oss_info(struct snd_mixer_oss_file *fmixer,
83 mixer_info __user *_info)
84{
85 struct snd_card *card = fmixer->card;
86 struct snd_mixer_oss *mixer = fmixer->mixer;
87 struct mixer_info info;
88
89 memset(&info, 0, sizeof(info));
90 strscpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));
91 strscpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));
92 info.modify_counter = card->mixer_oss_change_count;
93 if (copy_to_user(_info, &info, sizeof(info)))
94 return -EFAULT;
95 return 0;
96}
97
98static int snd_mixer_oss_info_obsolete(struct snd_mixer_oss_file *fmixer,
99 _old_mixer_info __user *_info)
100{
101 struct snd_card *card = fmixer->card;
102 struct snd_mixer_oss *mixer = fmixer->mixer;
103 _old_mixer_info info;
104
105 memset(&info, 0, sizeof(info));
106 strscpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));
107 strscpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));
108 if (copy_to_user(_info, &info, sizeof(info)))
109 return -EFAULT;
110 return 0;
111}
112
113static int snd_mixer_oss_caps(struct snd_mixer_oss_file *fmixer)
114{
115 struct snd_mixer_oss *mixer = fmixer->mixer;
116 int result = 0;
117
118 if (mixer == NULL)
119 return -EIO;
120 if (mixer->get_recsrc && mixer->put_recsrc)
121 result |= SOUND_CAP_EXCL_INPUT;
122 return result;
123}
124
125static int snd_mixer_oss_devmask(struct snd_mixer_oss_file *fmixer)
126{
127 struct snd_mixer_oss *mixer = fmixer->mixer;
128 struct snd_mixer_oss_slot *pslot;
129 int result = 0, chn;
130
131 if (mixer == NULL)
132 return -EIO;
133 for (chn = 0; chn < 31; chn++) {
134 pslot = &mixer->slots[chn];
135 if (pslot->put_volume || pslot->put_recsrc)
136 result |= 1 << chn;
137 }
138 return result;
139}
140
141static int snd_mixer_oss_stereodevs(struct snd_mixer_oss_file *fmixer)
142{
143 struct snd_mixer_oss *mixer = fmixer->mixer;
144 struct snd_mixer_oss_slot *pslot;
145 int result = 0, chn;
146
147 if (mixer == NULL)
148 return -EIO;
149 for (chn = 0; chn < 31; chn++) {
150 pslot = &mixer->slots[chn];
151 if (pslot->put_volume && pslot->stereo)
152 result |= 1 << chn;
153 }
154 return result;
155}
156
157static int snd_mixer_oss_recmask(struct snd_mixer_oss_file *fmixer)
158{
159 struct snd_mixer_oss *mixer = fmixer->mixer;
160 int result = 0;
161
162 if (mixer == NULL)
163 return -EIO;
164 if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */
165 result = mixer->mask_recsrc;
166 } else {
167 struct snd_mixer_oss_slot *pslot;
168 int chn;
169 for (chn = 0; chn < 31; chn++) {
170 pslot = &mixer->slots[chn];
171 if (pslot->put_recsrc)
172 result |= 1 << chn;
173 }
174 }
175 return result;
176}
177
178static int snd_mixer_oss_get_recsrc(struct snd_mixer_oss_file *fmixer)
179{
180 struct snd_mixer_oss *mixer = fmixer->mixer;
181 int result = 0;
182
183 if (mixer == NULL)
184 return -EIO;
185 if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */
186 int err;
187 unsigned int index;
188 err = mixer->get_recsrc(fmixer, &index);
189 if (err < 0)
190 return err;
191 result = 1 << index;
192 } else {
193 struct snd_mixer_oss_slot *pslot;
194 int chn;
195 for (chn = 0; chn < 31; chn++) {
196 pslot = &mixer->slots[chn];
197 if (pslot->get_recsrc) {
198 int active = 0;
199 pslot->get_recsrc(fmixer, pslot, &active);
200 if (active)
201 result |= 1 << chn;
202 }
203 }
204 }
205 return mixer->oss_recsrc = result;
206}
207
208static int snd_mixer_oss_set_recsrc(struct snd_mixer_oss_file *fmixer, int recsrc)
209{
210 struct snd_mixer_oss *mixer = fmixer->mixer;
211 struct snd_mixer_oss_slot *pslot;
212 int chn, active;
213 unsigned int index;
214 int result = 0;
215
216 if (mixer == NULL)
217 return -EIO;
218 if (mixer->get_recsrc && mixer->put_recsrc) { /* exclusive input */
219 if (recsrc & ~mixer->oss_recsrc)
220 recsrc &= ~mixer->oss_recsrc;
221 mixer->put_recsrc(fmixer, ffz(~recsrc));
222 mixer->get_recsrc(fmixer, &index);
223 result = 1 << index;
224 }
225 for (chn = 0; chn < 31; chn++) {
226 pslot = &mixer->slots[chn];
227 if (pslot->put_recsrc) {
228 active = (recsrc & (1 << chn)) ? 1 : 0;
229 pslot->put_recsrc(fmixer, pslot, active);
230 }
231 }
232 if (! result) {
233 for (chn = 0; chn < 31; chn++) {
234 pslot = &mixer->slots[chn];
235 if (pslot->get_recsrc) {
236 active = 0;
237 pslot->get_recsrc(fmixer, pslot, &active);
238 if (active)
239 result |= 1 << chn;
240 }
241 }
242 }
243 return result;
244}
245
246static int snd_mixer_oss_get_volume(struct snd_mixer_oss_file *fmixer, int slot)
247{
248 struct snd_mixer_oss *mixer = fmixer->mixer;
249 struct snd_mixer_oss_slot *pslot;
250 int result = 0, left, right;
251
252 if (mixer == NULL || slot > 30)
253 return -EIO;
254 pslot = &mixer->slots[slot];
255 left = pslot->volume[0];
256 right = pslot->volume[1];
257 if (pslot->get_volume)
258 result = pslot->get_volume(fmixer, pslot, &left, &right);
259 if (!pslot->stereo)
260 right = left;
261 if (snd_BUG_ON(left < 0 || left > 100))
262 return -EIO;
263 if (snd_BUG_ON(right < 0 || right > 100))
264 return -EIO;
265 if (result >= 0) {
266 pslot->volume[0] = left;
267 pslot->volume[1] = right;
268 result = (left & 0xff) | ((right & 0xff) << 8);
269 }
270 return result;
271}
272
273static int snd_mixer_oss_set_volume(struct snd_mixer_oss_file *fmixer,
274 int slot, int volume)
275{
276 struct snd_mixer_oss *mixer = fmixer->mixer;
277 struct snd_mixer_oss_slot *pslot;
278 int result = 0, left = volume & 0xff, right = (volume >> 8) & 0xff;
279
280 if (mixer == NULL || slot > 30)
281 return -EIO;
282 pslot = &mixer->slots[slot];
283 if (left > 100)
284 left = 100;
285 if (right > 100)
286 right = 100;
287 if (!pslot->stereo)
288 right = left;
289 if (pslot->put_volume)
290 result = pslot->put_volume(fmixer, pslot, left, right);
291 if (result < 0)
292 return result;
293 pslot->volume[0] = left;
294 pslot->volume[1] = right;
295 return (left & 0xff) | ((right & 0xff) << 8);
296}
297
298static int snd_mixer_oss_ioctl1(struct snd_mixer_oss_file *fmixer, unsigned int cmd, unsigned long arg)
299{
300 void __user *argp = (void __user *)arg;
301 int __user *p = argp;
302 int tmp;
303
304 if (snd_BUG_ON(!fmixer))
305 return -ENXIO;
306 if (((cmd >> 8) & 0xff) == 'M') {
307 switch (cmd) {
308 case SOUND_MIXER_INFO:
309 return snd_mixer_oss_info(fmixer, argp);
310 case SOUND_OLD_MIXER_INFO:
311 return snd_mixer_oss_info_obsolete(fmixer, argp);
312 case SOUND_MIXER_WRITE_RECSRC:
313 if (get_user(tmp, p))
314 return -EFAULT;
315 tmp = snd_mixer_oss_set_recsrc(fmixer, tmp);
316 if (tmp < 0)
317 return tmp;
318 return put_user(tmp, p);
319 case OSS_GETVERSION:
320 return put_user(SNDRV_OSS_VERSION, p);
321 case OSS_ALSAEMULVER:
322 return put_user(1, p);
323 case SOUND_MIXER_READ_DEVMASK:
324 tmp = snd_mixer_oss_devmask(fmixer);
325 if (tmp < 0)
326 return tmp;
327 return put_user(tmp, p);
328 case SOUND_MIXER_READ_STEREODEVS:
329 tmp = snd_mixer_oss_stereodevs(fmixer);
330 if (tmp < 0)
331 return tmp;
332 return put_user(tmp, p);
333 case SOUND_MIXER_READ_RECMASK:
334 tmp = snd_mixer_oss_recmask(fmixer);
335 if (tmp < 0)
336 return tmp;
337 return put_user(tmp, p);
338 case SOUND_MIXER_READ_CAPS:
339 tmp = snd_mixer_oss_caps(fmixer);
340 if (tmp < 0)
341 return tmp;
342 return put_user(tmp, p);
343 case SOUND_MIXER_READ_RECSRC:
344 tmp = snd_mixer_oss_get_recsrc(fmixer);
345 if (tmp < 0)
346 return tmp;
347 return put_user(tmp, p);
348 }
349 }
350 if (cmd & SIOC_IN) {
351 if (get_user(tmp, p))
352 return -EFAULT;
353 tmp = snd_mixer_oss_set_volume(fmixer, cmd & 0xff, tmp);
354 if (tmp < 0)
355 return tmp;
356 return put_user(tmp, p);
357 } else if (cmd & SIOC_OUT) {
358 tmp = snd_mixer_oss_get_volume(fmixer, cmd & 0xff);
359 if (tmp < 0)
360 return tmp;
361 return put_user(tmp, p);
362 }
363 return -ENXIO;
364}
365
366static long snd_mixer_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
367{
368 return snd_mixer_oss_ioctl1(file->private_data, cmd, arg);
369}
370
371int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg)
372{
373 struct snd_mixer_oss_file fmixer;
374
375 if (snd_BUG_ON(!card))
376 return -ENXIO;
377 if (card->mixer_oss == NULL)
378 return -ENXIO;
379 memset(&fmixer, 0, sizeof(fmixer));
380 fmixer.card = card;
381 fmixer.mixer = card->mixer_oss;
382 return snd_mixer_oss_ioctl1(&fmixer, cmd, arg);
383}
384EXPORT_SYMBOL(snd_mixer_oss_ioctl_card);
385
386#ifdef CONFIG_COMPAT
387/* all compatible */
388static long snd_mixer_oss_ioctl_compat(struct file *file, unsigned int cmd,
389 unsigned long arg)
390{
391 return snd_mixer_oss_ioctl1(file->private_data, cmd,
392 (unsigned long)compat_ptr(arg));
393}
394#else
395#define snd_mixer_oss_ioctl_compat NULL
396#endif
397
398/*
399 * REGISTRATION PART
400 */
401
402static const struct file_operations snd_mixer_oss_f_ops =
403{
404 .owner = THIS_MODULE,
405 .open = snd_mixer_oss_open,
406 .release = snd_mixer_oss_release,
407 .llseek = no_llseek,
408 .unlocked_ioctl = snd_mixer_oss_ioctl,
409 .compat_ioctl = snd_mixer_oss_ioctl_compat,
410};
411
412/*
413 * utilities
414 */
415
416static long snd_mixer_oss_conv(long val, long omin, long omax, long nmin, long nmax)
417{
418 long orange = omax - omin, nrange = nmax - nmin;
419
420 if (orange == 0)
421 return 0;
422 return DIV_ROUND_CLOSEST(nrange * (val - omin), orange) + nmin;
423}
424
425/* convert from alsa native to oss values (0-100) */
426static long snd_mixer_oss_conv1(long val, long min, long max, int *old)
427{
428 if (val == snd_mixer_oss_conv(*old, 0, 100, min, max))
429 return *old;
430 return snd_mixer_oss_conv(val, min, max, 0, 100);
431}
432
433/* convert from oss to alsa native values */
434static long snd_mixer_oss_conv2(long val, long min, long max)
435{
436 return snd_mixer_oss_conv(val, 0, 100, min, max);
437}
438
439#if 0
440static void snd_mixer_oss_recsrce_set(struct snd_card *card, int slot)
441{
442 struct snd_mixer_oss *mixer = card->mixer_oss;
443 if (mixer)
444 mixer->mask_recsrc |= 1 << slot;
445}
446
447static int snd_mixer_oss_recsrce_get(struct snd_card *card, int slot)
448{
449 struct snd_mixer_oss *mixer = card->mixer_oss;
450 if (mixer && (mixer->mask_recsrc & (1 << slot)))
451 return 1;
452 return 0;
453}
454#endif
455
456#define SNDRV_MIXER_OSS_SIGNATURE 0x65999250
457
458#define SNDRV_MIXER_OSS_ITEM_GLOBAL 0
459#define SNDRV_MIXER_OSS_ITEM_GSWITCH 1
460#define SNDRV_MIXER_OSS_ITEM_GROUTE 2
461#define SNDRV_MIXER_OSS_ITEM_GVOLUME 3
462#define SNDRV_MIXER_OSS_ITEM_PSWITCH 4
463#define SNDRV_MIXER_OSS_ITEM_PROUTE 5
464#define SNDRV_MIXER_OSS_ITEM_PVOLUME 6
465#define SNDRV_MIXER_OSS_ITEM_CSWITCH 7
466#define SNDRV_MIXER_OSS_ITEM_CROUTE 8
467#define SNDRV_MIXER_OSS_ITEM_CVOLUME 9
468#define SNDRV_MIXER_OSS_ITEM_CAPTURE 10
469
470#define SNDRV_MIXER_OSS_ITEM_COUNT 11
471
472#define SNDRV_MIXER_OSS_PRESENT_GLOBAL (1<<0)
473#define SNDRV_MIXER_OSS_PRESENT_GSWITCH (1<<1)
474#define SNDRV_MIXER_OSS_PRESENT_GROUTE (1<<2)
475#define SNDRV_MIXER_OSS_PRESENT_GVOLUME (1<<3)
476#define SNDRV_MIXER_OSS_PRESENT_PSWITCH (1<<4)
477#define SNDRV_MIXER_OSS_PRESENT_PROUTE (1<<5)
478#define SNDRV_MIXER_OSS_PRESENT_PVOLUME (1<<6)
479#define SNDRV_MIXER_OSS_PRESENT_CSWITCH (1<<7)
480#define SNDRV_MIXER_OSS_PRESENT_CROUTE (1<<8)
481#define SNDRV_MIXER_OSS_PRESENT_CVOLUME (1<<9)
482#define SNDRV_MIXER_OSS_PRESENT_CAPTURE (1<<10)
483
484struct slot {
485 unsigned int signature;
486 unsigned int present;
487 unsigned int channels;
488 unsigned int numid[SNDRV_MIXER_OSS_ITEM_COUNT];
489 unsigned int capture_item;
490 const struct snd_mixer_oss_assign_table *assigned;
491 unsigned int allocated: 1;
492};
493
494#define ID_UNKNOWN ((unsigned int)-1)
495
496static struct snd_kcontrol *snd_mixer_oss_test_id(struct snd_mixer_oss *mixer, const char *name, int index)
497{
498 struct snd_card *card = mixer->card;
499 struct snd_ctl_elem_id id;
500
501 memset(&id, 0, sizeof(id));
502 id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
503 strscpy(id.name, name, sizeof(id.name));
504 id.index = index;
505 return snd_ctl_find_id(card, &id);
506}
507
508static void snd_mixer_oss_get_volume1_vol(struct snd_mixer_oss_file *fmixer,
509 struct snd_mixer_oss_slot *pslot,
510 unsigned int numid,
511 int *left, int *right)
512{
513 struct snd_ctl_elem_info *uinfo;
514 struct snd_ctl_elem_value *uctl;
515 struct snd_kcontrol *kctl;
516 struct snd_card *card = fmixer->card;
517
518 if (numid == ID_UNKNOWN)
519 return;
520 down_read(&card->controls_rwsem);
521 kctl = snd_ctl_find_numid(card, numid);
522 if (!kctl) {
523 up_read(&card->controls_rwsem);
524 return;
525 }
526 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
527 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
528 if (uinfo == NULL || uctl == NULL)
529 goto __unalloc;
530 if (kctl->info(kctl, uinfo))
531 goto __unalloc;
532 if (kctl->get(kctl, uctl))
533 goto __unalloc;
534 if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
535 uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
536 goto __unalloc;
537 *left = snd_mixer_oss_conv1(uctl->value.integer.value[0], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[0]);
538 if (uinfo->count > 1)
539 *right = snd_mixer_oss_conv1(uctl->value.integer.value[1], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[1]);
540 __unalloc:
541 up_read(&card->controls_rwsem);
542 kfree(uctl);
543 kfree(uinfo);
544}
545
546static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer,
547 struct snd_mixer_oss_slot *pslot,
548 unsigned int numid,
549 int *left, int *right,
550 int route)
551{
552 struct snd_ctl_elem_info *uinfo;
553 struct snd_ctl_elem_value *uctl;
554 struct snd_kcontrol *kctl;
555 struct snd_card *card = fmixer->card;
556
557 if (numid == ID_UNKNOWN)
558 return;
559 down_read(&card->controls_rwsem);
560 kctl = snd_ctl_find_numid(card, numid);
561 if (!kctl) {
562 up_read(&card->controls_rwsem);
563 return;
564 }
565 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
566 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
567 if (uinfo == NULL || uctl == NULL)
568 goto __unalloc;
569 if (kctl->info(kctl, uinfo))
570 goto __unalloc;
571 if (kctl->get(kctl, uctl))
572 goto __unalloc;
573 if (!uctl->value.integer.value[0]) {
574 *left = 0;
575 if (uinfo->count == 1)
576 *right = 0;
577 }
578 if (uinfo->count > 1 && !uctl->value.integer.value[route ? 3 : 1])
579 *right = 0;
580 __unalloc:
581 up_read(&card->controls_rwsem);
582 kfree(uctl);
583 kfree(uinfo);
584}
585
586static int snd_mixer_oss_get_volume1(struct snd_mixer_oss_file *fmixer,
587 struct snd_mixer_oss_slot *pslot,
588 int *left, int *right)
589{
590 struct slot *slot = pslot->private_data;
591
592 *left = *right = 100;
593 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
594 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
595 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
596 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
597 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
598 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
599 }
600 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
601 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
602 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
603 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
604 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
605 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
606 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
607 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
608 }
609 return 0;
610}
611
612static void snd_mixer_oss_put_volume1_vol(struct snd_mixer_oss_file *fmixer,
613 struct snd_mixer_oss_slot *pslot,
614 unsigned int numid,
615 int left, int right)
616{
617 struct snd_ctl_elem_info *uinfo;
618 struct snd_ctl_elem_value *uctl;
619 struct snd_kcontrol *kctl;
620 struct snd_card *card = fmixer->card;
621 int res;
622
623 if (numid == ID_UNKNOWN)
624 return;
625 down_read(&card->controls_rwsem);
626 kctl = snd_ctl_find_numid(card, numid);
627 if (!kctl) {
628 up_read(&card->controls_rwsem);
629 return;
630 }
631 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
632 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
633 if (uinfo == NULL || uctl == NULL)
634 goto __unalloc;
635 if (kctl->info(kctl, uinfo))
636 goto __unalloc;
637 if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
638 uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
639 goto __unalloc;
640 uctl->value.integer.value[0] = snd_mixer_oss_conv2(left, uinfo->value.integer.min, uinfo->value.integer.max);
641 if (uinfo->count > 1)
642 uctl->value.integer.value[1] = snd_mixer_oss_conv2(right, uinfo->value.integer.min, uinfo->value.integer.max);
643 res = kctl->put(kctl, uctl);
644 if (res < 0)
645 goto __unalloc;
646 if (res > 0)
647 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
648 __unalloc:
649 up_read(&card->controls_rwsem);
650 kfree(uctl);
651 kfree(uinfo);
652}
653
654static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer,
655 struct snd_mixer_oss_slot *pslot,
656 unsigned int numid,
657 int left, int right,
658 int route)
659{
660 struct snd_ctl_elem_info *uinfo;
661 struct snd_ctl_elem_value *uctl;
662 struct snd_kcontrol *kctl;
663 struct snd_card *card = fmixer->card;
664 int res;
665
666 if (numid == ID_UNKNOWN)
667 return;
668 down_read(&card->controls_rwsem);
669 kctl = snd_ctl_find_numid(card, numid);
670 if (!kctl) {
671 up_read(&card->controls_rwsem);
672 return;
673 }
674 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
675 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
676 if (uinfo == NULL || uctl == NULL)
677 goto __unalloc;
678 if (kctl->info(kctl, uinfo))
679 goto __unalloc;
680 if (uinfo->count > 1) {
681 uctl->value.integer.value[0] = left > 0 ? 1 : 0;
682 uctl->value.integer.value[route ? 3 : 1] = right > 0 ? 1 : 0;
683 if (route) {
684 uctl->value.integer.value[1] =
685 uctl->value.integer.value[2] = 0;
686 }
687 } else {
688 uctl->value.integer.value[0] = (left > 0 || right > 0) ? 1 : 0;
689 }
690 res = kctl->put(kctl, uctl);
691 if (res < 0)
692 goto __unalloc;
693 if (res > 0)
694 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
695 __unalloc:
696 up_read(&card->controls_rwsem);
697 kfree(uctl);
698 kfree(uinfo);
699}
700
701static int snd_mixer_oss_put_volume1(struct snd_mixer_oss_file *fmixer,
702 struct snd_mixer_oss_slot *pslot,
703 int left, int right)
704{
705 struct slot *slot = pslot->private_data;
706
707 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
708 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
709 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME)
710 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
711 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) {
712 snd_mixer_oss_put_volume1_vol(fmixer, pslot,
713 slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
714 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
715 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
716 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
717 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
718 }
719 if (left || right) {
720 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH)
721 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
722 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH)
723 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
724 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH)
725 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
726 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE)
727 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
728 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE)
729 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
730 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE)
731 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
732 } else {
733 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
734 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
735 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
736 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
737 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
738 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
739 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
740 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
741 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
742 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
743 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
744 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
745 }
746 }
747 return 0;
748}
749
750static int snd_mixer_oss_get_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
751 struct snd_mixer_oss_slot *pslot,
752 int *active)
753{
754 struct slot *slot = pslot->private_data;
755 int left, right;
756
757 left = right = 1;
758 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], &left, &right, 0);
759 *active = (left || right) ? 1 : 0;
760 return 0;
761}
762
763static int snd_mixer_oss_get_recsrc1_route(struct snd_mixer_oss_file *fmixer,
764 struct snd_mixer_oss_slot *pslot,
765 int *active)
766{
767 struct slot *slot = pslot->private_data;
768 int left, right;
769
770 left = right = 1;
771 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], &left, &right, 1);
772 *active = (left || right) ? 1 : 0;
773 return 0;
774}
775
776static int snd_mixer_oss_put_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
777 struct snd_mixer_oss_slot *pslot,
778 int active)
779{
780 struct slot *slot = pslot->private_data;
781
782 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], active, active, 0);
783 return 0;
784}
785
786static int snd_mixer_oss_put_recsrc1_route(struct snd_mixer_oss_file *fmixer,
787 struct snd_mixer_oss_slot *pslot,
788 int active)
789{
790 struct slot *slot = pslot->private_data;
791
792 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], active, active, 1);
793 return 0;
794}
795
796static int snd_mixer_oss_get_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int *active_index)
797{
798 struct snd_card *card = fmixer->card;
799 struct snd_mixer_oss *mixer = fmixer->mixer;
800 struct snd_kcontrol *kctl;
801 struct snd_mixer_oss_slot *pslot;
802 struct slot *slot;
803 struct snd_ctl_elem_info *uinfo;
804 struct snd_ctl_elem_value *uctl;
805 int err, idx;
806
807 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
808 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
809 if (uinfo == NULL || uctl == NULL) {
810 err = -ENOMEM;
811 goto __free_only;
812 }
813 down_read(&card->controls_rwsem);
814 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
815 if (! kctl) {
816 err = -ENOENT;
817 goto __unlock;
818 }
819 err = kctl->info(kctl, uinfo);
820 if (err < 0)
821 goto __unlock;
822 err = kctl->get(kctl, uctl);
823 if (err < 0)
824 goto __unlock;
825 for (idx = 0; idx < 32; idx++) {
826 if (!(mixer->mask_recsrc & (1 << idx)))
827 continue;
828 pslot = &mixer->slots[idx];
829 slot = pslot->private_data;
830 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
831 continue;
832 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
833 continue;
834 if (slot->capture_item == uctl->value.enumerated.item[0]) {
835 *active_index = idx;
836 break;
837 }
838 }
839 err = 0;
840 __unlock:
841 up_read(&card->controls_rwsem);
842 __free_only:
843 kfree(uctl);
844 kfree(uinfo);
845 return err;
846}
847
848static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int active_index)
849{
850 struct snd_card *card = fmixer->card;
851 struct snd_mixer_oss *mixer = fmixer->mixer;
852 struct snd_kcontrol *kctl;
853 struct snd_mixer_oss_slot *pslot;
854 struct slot *slot = NULL;
855 struct snd_ctl_elem_info *uinfo;
856 struct snd_ctl_elem_value *uctl;
857 int err;
858 unsigned int idx;
859
860 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
861 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
862 if (uinfo == NULL || uctl == NULL) {
863 err = -ENOMEM;
864 goto __free_only;
865 }
866 down_read(&card->controls_rwsem);
867 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
868 if (! kctl) {
869 err = -ENOENT;
870 goto __unlock;
871 }
872 err = kctl->info(kctl, uinfo);
873 if (err < 0)
874 goto __unlock;
875 for (idx = 0; idx < 32; idx++) {
876 if (!(mixer->mask_recsrc & (1 << idx)))
877 continue;
878 pslot = &mixer->slots[idx];
879 slot = pslot->private_data;
880 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
881 continue;
882 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
883 continue;
884 if (idx == active_index)
885 break;
886 slot = NULL;
887 }
888 if (! slot)
889 goto __unlock;
890 for (idx = 0; idx < uinfo->count; idx++)
891 uctl->value.enumerated.item[idx] = slot->capture_item;
892 err = kctl->put(kctl, uctl);
893 if (err > 0)
894 snd_ctl_notify(fmixer->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
895 err = 0;
896 __unlock:
897 up_read(&card->controls_rwsem);
898 __free_only:
899 kfree(uctl);
900 kfree(uinfo);
901 return err;
902}
903
904struct snd_mixer_oss_assign_table {
905 int oss_id;
906 const char *name;
907 int index;
908};
909
910static int snd_mixer_oss_build_test(struct snd_mixer_oss *mixer, struct slot *slot, const char *name, int index, int item)
911{
912 struct snd_ctl_elem_info *info;
913 struct snd_kcontrol *kcontrol;
914 struct snd_card *card = mixer->card;
915 int err;
916
917 down_read(&card->controls_rwsem);
918 kcontrol = snd_mixer_oss_test_id(mixer, name, index);
919 if (kcontrol == NULL) {
920 up_read(&card->controls_rwsem);
921 return 0;
922 }
923 info = kmalloc(sizeof(*info), GFP_KERNEL);
924 if (! info) {
925 up_read(&card->controls_rwsem);
926 return -ENOMEM;
927 }
928 err = kcontrol->info(kcontrol, info);
929 if (err < 0) {
930 up_read(&card->controls_rwsem);
931 kfree(info);
932 return err;
933 }
934 slot->numid[item] = kcontrol->id.numid;
935 up_read(&card->controls_rwsem);
936 if (info->count > slot->channels)
937 slot->channels = info->count;
938 slot->present |= 1 << item;
939 kfree(info);
940 return 0;
941}
942
943static void snd_mixer_oss_slot_free(struct snd_mixer_oss_slot *chn)
944{
945 struct slot *p = chn->private_data;
946 if (p) {
947 if (p->allocated && p->assigned) {
948 kfree_const(p->assigned->name);
949 kfree_const(p->assigned);
950 }
951 kfree(p);
952 }
953}
954
955static void mixer_slot_clear(struct snd_mixer_oss_slot *rslot)
956{
957 int idx = rslot->number; /* remember this */
958 if (rslot->private_free)
959 rslot->private_free(rslot);
960 memset(rslot, 0, sizeof(*rslot));
961 rslot->number = idx;
962}
963
964/* In a separate function to keep gcc 3.2 happy - do NOT merge this in
965 snd_mixer_oss_build_input! */
966static int snd_mixer_oss_build_test_all(struct snd_mixer_oss *mixer,
967 const struct snd_mixer_oss_assign_table *ptr,
968 struct slot *slot)
969{
970 char str[64];
971 int err;
972
973 err = snd_mixer_oss_build_test(mixer, slot, ptr->name, ptr->index,
974 SNDRV_MIXER_OSS_ITEM_GLOBAL);
975 if (err)
976 return err;
977 sprintf(str, "%s Switch", ptr->name);
978 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
979 SNDRV_MIXER_OSS_ITEM_GSWITCH);
980 if (err)
981 return err;
982 sprintf(str, "%s Route", ptr->name);
983 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
984 SNDRV_MIXER_OSS_ITEM_GROUTE);
985 if (err)
986 return err;
987 sprintf(str, "%s Volume", ptr->name);
988 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
989 SNDRV_MIXER_OSS_ITEM_GVOLUME);
990 if (err)
991 return err;
992 sprintf(str, "%s Playback Switch", ptr->name);
993 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
994 SNDRV_MIXER_OSS_ITEM_PSWITCH);
995 if (err)
996 return err;
997 sprintf(str, "%s Playback Route", ptr->name);
998 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
999 SNDRV_MIXER_OSS_ITEM_PROUTE);
1000 if (err)
1001 return err;
1002 sprintf(str, "%s Playback Volume", ptr->name);
1003 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1004 SNDRV_MIXER_OSS_ITEM_PVOLUME);
1005 if (err)
1006 return err;
1007 sprintf(str, "%s Capture Switch", ptr->name);
1008 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1009 SNDRV_MIXER_OSS_ITEM_CSWITCH);
1010 if (err)
1011 return err;
1012 sprintf(str, "%s Capture Route", ptr->name);
1013 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1014 SNDRV_MIXER_OSS_ITEM_CROUTE);
1015 if (err)
1016 return err;
1017 sprintf(str, "%s Capture Volume", ptr->name);
1018 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1019 SNDRV_MIXER_OSS_ITEM_CVOLUME);
1020 if (err)
1021 return err;
1022
1023 return 0;
1024}
1025
1026/*
1027 * build an OSS mixer element.
1028 * ptr_allocated means the entry is dynamically allocated (change via proc file).
1029 * when replace_old = 1, the old entry is replaced with the new one.
1030 */
1031static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer,
1032 const struct snd_mixer_oss_assign_table *ptr,
1033 int ptr_allocated, int replace_old)
1034{
1035 struct slot slot;
1036 struct slot *pslot;
1037 struct snd_kcontrol *kctl;
1038 struct snd_mixer_oss_slot *rslot;
1039 char str[64];
1040
1041 /* check if already assigned */
1042 if (mixer->slots[ptr->oss_id].get_volume && ! replace_old)
1043 return 0;
1044
1045 memset(&slot, 0, sizeof(slot));
1046 memset(slot.numid, 0xff, sizeof(slot.numid)); /* ID_UNKNOWN */
1047 if (snd_mixer_oss_build_test_all(mixer, ptr, &slot))
1048 return 0;
1049 down_read(&mixer->card->controls_rwsem);
1050 kctl = NULL;
1051 if (!ptr->index)
1052 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
1053 if (kctl) {
1054 struct snd_ctl_elem_info *uinfo;
1055
1056 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
1057 if (! uinfo) {
1058 up_read(&mixer->card->controls_rwsem);
1059 return -ENOMEM;
1060 }
1061
1062 if (kctl->info(kctl, uinfo)) {
1063 up_read(&mixer->card->controls_rwsem);
1064 kfree(uinfo);
1065 return 0;
1066 }
1067 strcpy(str, ptr->name);
1068 if (!strcmp(str, "Master"))
1069 strcpy(str, "Mix");
1070 if (!strcmp(str, "Master Mono"))
1071 strcpy(str, "Mix Mono");
1072 slot.capture_item = 0;
1073 if (!strcmp(uinfo->value.enumerated.name, str)) {
1074 slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1075 } else {
1076 for (slot.capture_item = 1; slot.capture_item < uinfo->value.enumerated.items; slot.capture_item++) {
1077 uinfo->value.enumerated.item = slot.capture_item;
1078 if (kctl->info(kctl, uinfo)) {
1079 up_read(&mixer->card->controls_rwsem);
1080 kfree(uinfo);
1081 return 0;
1082 }
1083 if (!strcmp(uinfo->value.enumerated.name, str)) {
1084 slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1085 break;
1086 }
1087 }
1088 }
1089 kfree(uinfo);
1090 }
1091 up_read(&mixer->card->controls_rwsem);
1092 if (slot.present != 0) {
1093 pslot = kmalloc(sizeof(slot), GFP_KERNEL);
1094 if (! pslot)
1095 return -ENOMEM;
1096 *pslot = slot;
1097 pslot->signature = SNDRV_MIXER_OSS_SIGNATURE;
1098 pslot->assigned = ptr;
1099 pslot->allocated = ptr_allocated;
1100 rslot = &mixer->slots[ptr->oss_id];
1101 mixer_slot_clear(rslot);
1102 rslot->stereo = slot.channels > 1 ? 1 : 0;
1103 rslot->get_volume = snd_mixer_oss_get_volume1;
1104 rslot->put_volume = snd_mixer_oss_put_volume1;
1105 /* note: ES18xx have both Capture Source and XX Capture Volume !!! */
1106 if (slot.present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
1107 rslot->get_recsrc = snd_mixer_oss_get_recsrc1_sw;
1108 rslot->put_recsrc = snd_mixer_oss_put_recsrc1_sw;
1109 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
1110 rslot->get_recsrc = snd_mixer_oss_get_recsrc1_route;
1111 rslot->put_recsrc = snd_mixer_oss_put_recsrc1_route;
1112 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CAPTURE) {
1113 mixer->mask_recsrc |= 1 << ptr->oss_id;
1114 }
1115 rslot->private_data = pslot;
1116 rslot->private_free = snd_mixer_oss_slot_free;
1117 return 1;
1118 }
1119 return 0;
1120}
1121
1122#ifdef CONFIG_SND_PROC_FS
1123/*
1124 */
1125#define MIXER_VOL(name) [SOUND_MIXER_##name] = #name
1126static const char * const oss_mixer_names[SNDRV_OSS_MAX_MIXERS] = {
1127 MIXER_VOL(VOLUME),
1128 MIXER_VOL(BASS),
1129 MIXER_VOL(TREBLE),
1130 MIXER_VOL(SYNTH),
1131 MIXER_VOL(PCM),
1132 MIXER_VOL(SPEAKER),
1133 MIXER_VOL(LINE),
1134 MIXER_VOL(MIC),
1135 MIXER_VOL(CD),
1136 MIXER_VOL(IMIX),
1137 MIXER_VOL(ALTPCM),
1138 MIXER_VOL(RECLEV),
1139 MIXER_VOL(IGAIN),
1140 MIXER_VOL(OGAIN),
1141 MIXER_VOL(LINE1),
1142 MIXER_VOL(LINE2),
1143 MIXER_VOL(LINE3),
1144 MIXER_VOL(DIGITAL1),
1145 MIXER_VOL(DIGITAL2),
1146 MIXER_VOL(DIGITAL3),
1147 MIXER_VOL(PHONEIN),
1148 MIXER_VOL(PHONEOUT),
1149 MIXER_VOL(VIDEO),
1150 MIXER_VOL(RADIO),
1151 MIXER_VOL(MONITOR),
1152};
1153
1154/*
1155 * /proc interface
1156 */
1157
1158static void snd_mixer_oss_proc_read(struct snd_info_entry *entry,
1159 struct snd_info_buffer *buffer)
1160{
1161 struct snd_mixer_oss *mixer = entry->private_data;
1162 int i;
1163
1164 mutex_lock(&mixer->reg_mutex);
1165 for (i = 0; i < SNDRV_OSS_MAX_MIXERS; i++) {
1166 struct slot *p;
1167
1168 if (! oss_mixer_names[i])
1169 continue;
1170 p = (struct slot *)mixer->slots[i].private_data;
1171 snd_iprintf(buffer, "%s ", oss_mixer_names[i]);
1172 if (p && p->assigned)
1173 snd_iprintf(buffer, "\"%s\" %d\n",
1174 p->assigned->name,
1175 p->assigned->index);
1176 else
1177 snd_iprintf(buffer, "\"\" 0\n");
1178 }
1179 mutex_unlock(&mixer->reg_mutex);
1180}
1181
1182static void snd_mixer_oss_proc_write(struct snd_info_entry *entry,
1183 struct snd_info_buffer *buffer)
1184{
1185 struct snd_mixer_oss *mixer = entry->private_data;
1186 char line[128], str[32], idxstr[16];
1187 const char *cptr;
1188 unsigned int idx;
1189 int ch;
1190 struct snd_mixer_oss_assign_table *tbl;
1191 struct slot *slot;
1192
1193 while (!snd_info_get_line(buffer, line, sizeof(line))) {
1194 cptr = snd_info_get_str(str, line, sizeof(str));
1195 for (ch = 0; ch < SNDRV_OSS_MAX_MIXERS; ch++)
1196 if (oss_mixer_names[ch] && strcmp(oss_mixer_names[ch], str) == 0)
1197 break;
1198 if (ch >= SNDRV_OSS_MAX_MIXERS) {
1199 pr_err("ALSA: mixer_oss: invalid OSS volume '%s'\n",
1200 str);
1201 continue;
1202 }
1203 cptr = snd_info_get_str(str, cptr, sizeof(str));
1204 if (! *str) {
1205 /* remove the entry */
1206 mutex_lock(&mixer->reg_mutex);
1207 mixer_slot_clear(&mixer->slots[ch]);
1208 mutex_unlock(&mixer->reg_mutex);
1209 continue;
1210 }
1211 snd_info_get_str(idxstr, cptr, sizeof(idxstr));
1212 idx = simple_strtoul(idxstr, NULL, 10);
1213 if (idx >= 0x4000) { /* too big */
1214 pr_err("ALSA: mixer_oss: invalid index %d\n", idx);
1215 continue;
1216 }
1217 mutex_lock(&mixer->reg_mutex);
1218 slot = (struct slot *)mixer->slots[ch].private_data;
1219 if (slot && slot->assigned &&
1220 slot->assigned->index == idx && ! strcmp(slot->assigned->name, str))
1221 /* not changed */
1222 goto __unlock;
1223 tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
1224 if (!tbl)
1225 goto __unlock;
1226 tbl->oss_id = ch;
1227 tbl->name = kstrdup(str, GFP_KERNEL);
1228 if (! tbl->name) {
1229 kfree(tbl);
1230 goto __unlock;
1231 }
1232 tbl->index = idx;
1233 if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) {
1234 kfree(tbl->name);
1235 kfree(tbl);
1236 }
1237 __unlock:
1238 mutex_unlock(&mixer->reg_mutex);
1239 }
1240}
1241
1242static void snd_mixer_oss_proc_init(struct snd_mixer_oss *mixer)
1243{
1244 struct snd_info_entry *entry;
1245
1246 entry = snd_info_create_card_entry(mixer->card, "oss_mixer",
1247 mixer->card->proc_root);
1248 if (! entry)
1249 return;
1250 entry->content = SNDRV_INFO_CONTENT_TEXT;
1251 entry->mode = S_IFREG | 0644;
1252 entry->c.text.read = snd_mixer_oss_proc_read;
1253 entry->c.text.write = snd_mixer_oss_proc_write;
1254 entry->private_data = mixer;
1255 if (snd_info_register(entry) < 0) {
1256 snd_info_free_entry(entry);
1257 entry = NULL;
1258 }
1259 mixer->proc_entry = entry;
1260}
1261
1262static void snd_mixer_oss_proc_done(struct snd_mixer_oss *mixer)
1263{
1264 snd_info_free_entry(mixer->proc_entry);
1265 mixer->proc_entry = NULL;
1266}
1267#else /* !CONFIG_SND_PROC_FS */
1268#define snd_mixer_oss_proc_init(mix)
1269#define snd_mixer_oss_proc_done(mix)
1270#endif /* CONFIG_SND_PROC_FS */
1271
1272static void snd_mixer_oss_build(struct snd_mixer_oss *mixer)
1273{
1274 static const struct snd_mixer_oss_assign_table table[] = {
1275 { SOUND_MIXER_VOLUME, "Master", 0 },
1276 { SOUND_MIXER_VOLUME, "Front", 0 }, /* fallback */
1277 { SOUND_MIXER_BASS, "Tone Control - Bass", 0 },
1278 { SOUND_MIXER_TREBLE, "Tone Control - Treble", 0 },
1279 { SOUND_MIXER_SYNTH, "Synth", 0 },
1280 { SOUND_MIXER_SYNTH, "FM", 0 }, /* fallback */
1281 { SOUND_MIXER_SYNTH, "Music", 0 }, /* fallback */
1282 { SOUND_MIXER_PCM, "PCM", 0 },
1283 { SOUND_MIXER_SPEAKER, "Beep", 0 },
1284 { SOUND_MIXER_SPEAKER, "PC Speaker", 0 }, /* fallback */
1285 { SOUND_MIXER_SPEAKER, "Speaker", 0 }, /* fallback */
1286 { SOUND_MIXER_LINE, "Line", 0 },
1287 { SOUND_MIXER_MIC, "Mic", 0 },
1288 { SOUND_MIXER_CD, "CD", 0 },
1289 { SOUND_MIXER_IMIX, "Monitor Mix", 0 },
1290 { SOUND_MIXER_ALTPCM, "PCM", 1 },
1291 { SOUND_MIXER_ALTPCM, "Headphone", 0 }, /* fallback */
1292 { SOUND_MIXER_ALTPCM, "Wave", 0 }, /* fallback */
1293 { SOUND_MIXER_RECLEV, "-- nothing --", 0 },
1294 { SOUND_MIXER_IGAIN, "Capture", 0 },
1295 { SOUND_MIXER_OGAIN, "Playback", 0 },
1296 { SOUND_MIXER_LINE1, "Aux", 0 },
1297 { SOUND_MIXER_LINE2, "Aux", 1 },
1298 { SOUND_MIXER_LINE3, "Aux", 2 },
1299 { SOUND_MIXER_DIGITAL1, "Digital", 0 },
1300 { SOUND_MIXER_DIGITAL1, "IEC958", 0 }, /* fallback */
1301 { SOUND_MIXER_DIGITAL1, "IEC958 Optical", 0 }, /* fallback */
1302 { SOUND_MIXER_DIGITAL1, "IEC958 Coaxial", 0 }, /* fallback */
1303 { SOUND_MIXER_DIGITAL2, "Digital", 1 },
1304 { SOUND_MIXER_DIGITAL3, "Digital", 2 },
1305 { SOUND_MIXER_PHONEIN, "Phone", 0 },
1306 { SOUND_MIXER_PHONEOUT, "Master Mono", 0 },
1307 { SOUND_MIXER_PHONEOUT, "Speaker", 0 }, /*fallback*/
1308 { SOUND_MIXER_PHONEOUT, "Mono", 0 }, /*fallback*/
1309 { SOUND_MIXER_PHONEOUT, "Phone", 0 }, /* fallback */
1310 { SOUND_MIXER_VIDEO, "Video", 0 },
1311 { SOUND_MIXER_RADIO, "Radio", 0 },
1312 { SOUND_MIXER_MONITOR, "Monitor", 0 }
1313 };
1314 unsigned int idx;
1315
1316 for (idx = 0; idx < ARRAY_SIZE(table); idx++)
1317 snd_mixer_oss_build_input(mixer, &table[idx], 0, 0);
1318 if (mixer->mask_recsrc) {
1319 mixer->get_recsrc = snd_mixer_oss_get_recsrc2;
1320 mixer->put_recsrc = snd_mixer_oss_put_recsrc2;
1321 }
1322}
1323
1324/*
1325 *
1326 */
1327
1328static int snd_mixer_oss_free1(void *private)
1329{
1330 struct snd_mixer_oss *mixer = private;
1331 struct snd_card *card;
1332 int idx;
1333
1334 if (!mixer)
1335 return 0;
1336 card = mixer->card;
1337 if (snd_BUG_ON(mixer != card->mixer_oss))
1338 return -ENXIO;
1339 card->mixer_oss = NULL;
1340 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) {
1341 struct snd_mixer_oss_slot *chn = &mixer->slots[idx];
1342 if (chn->private_free)
1343 chn->private_free(chn);
1344 }
1345 kfree(mixer);
1346 return 0;
1347}
1348
1349static int snd_mixer_oss_notify_handler(struct snd_card *card, int cmd)
1350{
1351 struct snd_mixer_oss *mixer;
1352
1353 if (cmd == SND_MIXER_OSS_NOTIFY_REGISTER) {
1354 int idx, err;
1355
1356 mixer = kcalloc(2, sizeof(*mixer), GFP_KERNEL);
1357 if (mixer == NULL)
1358 return -ENOMEM;
1359 mutex_init(&mixer->reg_mutex);
1360 err = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER,
1361 card, 0,
1362 &snd_mixer_oss_f_ops, card);
1363 if (err < 0) {
1364 dev_err(card->dev,
1365 "unable to register OSS mixer device %i:%i\n",
1366 card->number, 0);
1367 kfree(mixer);
1368 return err;
1369 }
1370 mixer->oss_dev_alloc = 1;
1371 mixer->card = card;
1372 if (*card->mixername)
1373 strscpy(mixer->name, card->mixername, sizeof(mixer->name));
1374 else
1375 snprintf(mixer->name, sizeof(mixer->name),
1376 "mixer%i", card->number);
1377#ifdef SNDRV_OSS_INFO_DEV_MIXERS
1378 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIXERS,
1379 card->number,
1380 mixer->name);
1381#endif
1382 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++)
1383 mixer->slots[idx].number = idx;
1384 card->mixer_oss = mixer;
1385 snd_mixer_oss_build(mixer);
1386 snd_mixer_oss_proc_init(mixer);
1387 } else {
1388 mixer = card->mixer_oss;
1389 if (mixer == NULL)
1390 return 0;
1391 if (mixer->oss_dev_alloc) {
1392#ifdef SNDRV_OSS_INFO_DEV_MIXERS
1393 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIXERS, mixer->card->number);
1394#endif
1395 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, mixer->card, 0);
1396 mixer->oss_dev_alloc = 0;
1397 }
1398 if (cmd == SND_MIXER_OSS_NOTIFY_DISCONNECT)
1399 return 0;
1400 snd_mixer_oss_proc_done(mixer);
1401 return snd_mixer_oss_free1(mixer);
1402 }
1403 return 0;
1404}
1405
1406static int __init alsa_mixer_oss_init(void)
1407{
1408 struct snd_card *card;
1409 int idx;
1410
1411 snd_mixer_oss_notify_callback = snd_mixer_oss_notify_handler;
1412 for (idx = 0; idx < SNDRV_CARDS; idx++) {
1413 card = snd_card_ref(idx);
1414 if (card) {
1415 snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_REGISTER);
1416 snd_card_unref(card);
1417 }
1418 }
1419 return 0;
1420}
1421
1422static void __exit alsa_mixer_oss_exit(void)
1423{
1424 struct snd_card *card;
1425 int idx;
1426
1427 snd_mixer_oss_notify_callback = NULL;
1428 for (idx = 0; idx < SNDRV_CARDS; idx++) {
1429 card = snd_card_ref(idx);
1430 if (card) {
1431 snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_FREE);
1432 snd_card_unref(card);
1433 }
1434 }
1435}
1436
1437module_init(alsa_mixer_oss_init)
1438module_exit(alsa_mixer_oss_exit)