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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 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 mutex_lock(&mixer->reg_mutex);
134 for (chn = 0; chn < 31; chn++) {
135 pslot = &mixer->slots[chn];
136 if (pslot->put_volume || pslot->put_recsrc)
137 result |= 1 << chn;
138 }
139 mutex_unlock(&mixer->reg_mutex);
140 return result;
141}
142
143static int snd_mixer_oss_stereodevs(struct snd_mixer_oss_file *fmixer)
144{
145 struct snd_mixer_oss *mixer = fmixer->mixer;
146 struct snd_mixer_oss_slot *pslot;
147 int result = 0, chn;
148
149 if (mixer == NULL)
150 return -EIO;
151 mutex_lock(&mixer->reg_mutex);
152 for (chn = 0; chn < 31; chn++) {
153 pslot = &mixer->slots[chn];
154 if (pslot->put_volume && pslot->stereo)
155 result |= 1 << chn;
156 }
157 mutex_unlock(&mixer->reg_mutex);
158 return result;
159}
160
161static int snd_mixer_oss_recmask(struct snd_mixer_oss_file *fmixer)
162{
163 struct snd_mixer_oss *mixer = fmixer->mixer;
164 int result = 0;
165
166 if (mixer == NULL)
167 return -EIO;
168 mutex_lock(&mixer->reg_mutex);
169 if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */
170 result = mixer->mask_recsrc;
171 } else {
172 struct snd_mixer_oss_slot *pslot;
173 int chn;
174 for (chn = 0; chn < 31; chn++) {
175 pslot = &mixer->slots[chn];
176 if (pslot->put_recsrc)
177 result |= 1 << chn;
178 }
179 }
180 mutex_unlock(&mixer->reg_mutex);
181 return result;
182}
183
184static int snd_mixer_oss_get_recsrc(struct snd_mixer_oss_file *fmixer)
185{
186 struct snd_mixer_oss *mixer = fmixer->mixer;
187 int result = 0;
188
189 if (mixer == NULL)
190 return -EIO;
191 mutex_lock(&mixer->reg_mutex);
192 if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */
193 unsigned int index;
194 result = mixer->get_recsrc(fmixer, &index);
195 if (result < 0)
196 goto unlock;
197 result = 1 << index;
198 } else {
199 struct snd_mixer_oss_slot *pslot;
200 int chn;
201 for (chn = 0; chn < 31; chn++) {
202 pslot = &mixer->slots[chn];
203 if (pslot->get_recsrc) {
204 int active = 0;
205 pslot->get_recsrc(fmixer, pslot, &active);
206 if (active)
207 result |= 1 << chn;
208 }
209 }
210 }
211 mixer->oss_recsrc = result;
212 unlock:
213 mutex_unlock(&mixer->reg_mutex);
214 return result;
215}
216
217static int snd_mixer_oss_set_recsrc(struct snd_mixer_oss_file *fmixer, int recsrc)
218{
219 struct snd_mixer_oss *mixer = fmixer->mixer;
220 struct snd_mixer_oss_slot *pslot;
221 int chn, active;
222 unsigned int index;
223 int result = 0;
224
225 if (mixer == NULL)
226 return -EIO;
227 mutex_lock(&mixer->reg_mutex);
228 if (mixer->get_recsrc && mixer->put_recsrc) { /* exclusive input */
229 if (recsrc & ~mixer->oss_recsrc)
230 recsrc &= ~mixer->oss_recsrc;
231 mixer->put_recsrc(fmixer, ffz(~recsrc));
232 mixer->get_recsrc(fmixer, &index);
233 result = 1 << index;
234 }
235 for (chn = 0; chn < 31; chn++) {
236 pslot = &mixer->slots[chn];
237 if (pslot->put_recsrc) {
238 active = (recsrc & (1 << chn)) ? 1 : 0;
239 pslot->put_recsrc(fmixer, pslot, active);
240 }
241 }
242 if (! result) {
243 for (chn = 0; chn < 31; chn++) {
244 pslot = &mixer->slots[chn];
245 if (pslot->get_recsrc) {
246 active = 0;
247 pslot->get_recsrc(fmixer, pslot, &active);
248 if (active)
249 result |= 1 << chn;
250 }
251 }
252 }
253 mutex_unlock(&mixer->reg_mutex);
254 return result;
255}
256
257static int snd_mixer_oss_get_volume(struct snd_mixer_oss_file *fmixer, int slot)
258{
259 struct snd_mixer_oss *mixer = fmixer->mixer;
260 struct snd_mixer_oss_slot *pslot;
261 int result = 0, left, right;
262
263 if (mixer == NULL || slot > 30)
264 return -EIO;
265 mutex_lock(&mixer->reg_mutex);
266 pslot = &mixer->slots[slot];
267 left = pslot->volume[0];
268 right = pslot->volume[1];
269 if (pslot->get_volume)
270 result = pslot->get_volume(fmixer, pslot, &left, &right);
271 if (!pslot->stereo)
272 right = left;
273 if (snd_BUG_ON(left < 0 || left > 100)) {
274 result = -EIO;
275 goto unlock;
276 }
277 if (snd_BUG_ON(right < 0 || right > 100)) {
278 result = -EIO;
279 goto unlock;
280 }
281 if (result >= 0) {
282 pslot->volume[0] = left;
283 pslot->volume[1] = right;
284 result = (left & 0xff) | ((right & 0xff) << 8);
285 }
286 unlock:
287 mutex_unlock(&mixer->reg_mutex);
288 return result;
289}
290
291static int snd_mixer_oss_set_volume(struct snd_mixer_oss_file *fmixer,
292 int slot, int volume)
293{
294 struct snd_mixer_oss *mixer = fmixer->mixer;
295 struct snd_mixer_oss_slot *pslot;
296 int result = 0, left = volume & 0xff, right = (volume >> 8) & 0xff;
297
298 if (mixer == NULL || slot > 30)
299 return -EIO;
300 mutex_lock(&mixer->reg_mutex);
301 pslot = &mixer->slots[slot];
302 if (left > 100)
303 left = 100;
304 if (right > 100)
305 right = 100;
306 if (!pslot->stereo)
307 right = left;
308 if (pslot->put_volume)
309 result = pslot->put_volume(fmixer, pslot, left, right);
310 if (result < 0)
311 goto unlock;
312 pslot->volume[0] = left;
313 pslot->volume[1] = right;
314 result = (left & 0xff) | ((right & 0xff) << 8);
315 unlock:
316 mutex_unlock(&mixer->reg_mutex);
317 return result;
318}
319
320static int snd_mixer_oss_ioctl1(struct snd_mixer_oss_file *fmixer, unsigned int cmd, unsigned long arg)
321{
322 void __user *argp = (void __user *)arg;
323 int __user *p = argp;
324 int tmp;
325
326 if (snd_BUG_ON(!fmixer))
327 return -ENXIO;
328 if (((cmd >> 8) & 0xff) == 'M') {
329 switch (cmd) {
330 case SOUND_MIXER_INFO:
331 return snd_mixer_oss_info(fmixer, argp);
332 case SOUND_OLD_MIXER_INFO:
333 return snd_mixer_oss_info_obsolete(fmixer, argp);
334 case SOUND_MIXER_WRITE_RECSRC:
335 if (get_user(tmp, p))
336 return -EFAULT;
337 tmp = snd_mixer_oss_set_recsrc(fmixer, tmp);
338 if (tmp < 0)
339 return tmp;
340 return put_user(tmp, p);
341 case OSS_GETVERSION:
342 return put_user(SNDRV_OSS_VERSION, p);
343 case OSS_ALSAEMULVER:
344 return put_user(1, p);
345 case SOUND_MIXER_READ_DEVMASK:
346 tmp = snd_mixer_oss_devmask(fmixer);
347 if (tmp < 0)
348 return tmp;
349 return put_user(tmp, p);
350 case SOUND_MIXER_READ_STEREODEVS:
351 tmp = snd_mixer_oss_stereodevs(fmixer);
352 if (tmp < 0)
353 return tmp;
354 return put_user(tmp, p);
355 case SOUND_MIXER_READ_RECMASK:
356 tmp = snd_mixer_oss_recmask(fmixer);
357 if (tmp < 0)
358 return tmp;
359 return put_user(tmp, p);
360 case SOUND_MIXER_READ_CAPS:
361 tmp = snd_mixer_oss_caps(fmixer);
362 if (tmp < 0)
363 return tmp;
364 return put_user(tmp, p);
365 case SOUND_MIXER_READ_RECSRC:
366 tmp = snd_mixer_oss_get_recsrc(fmixer);
367 if (tmp < 0)
368 return tmp;
369 return put_user(tmp, p);
370 }
371 }
372 if (cmd & SIOC_IN) {
373 if (get_user(tmp, p))
374 return -EFAULT;
375 tmp = snd_mixer_oss_set_volume(fmixer, cmd & 0xff, tmp);
376 if (tmp < 0)
377 return tmp;
378 return put_user(tmp, p);
379 } else if (cmd & SIOC_OUT) {
380 tmp = snd_mixer_oss_get_volume(fmixer, cmd & 0xff);
381 if (tmp < 0)
382 return tmp;
383 return put_user(tmp, p);
384 }
385 return -ENXIO;
386}
387
388static long snd_mixer_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
389{
390 return snd_mixer_oss_ioctl1(file->private_data, cmd, arg);
391}
392
393int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg)
394{
395 struct snd_mixer_oss_file fmixer;
396
397 if (snd_BUG_ON(!card))
398 return -ENXIO;
399 if (card->mixer_oss == NULL)
400 return -ENXIO;
401 memset(&fmixer, 0, sizeof(fmixer));
402 fmixer.card = card;
403 fmixer.mixer = card->mixer_oss;
404 return snd_mixer_oss_ioctl1(&fmixer, cmd, arg);
405}
406EXPORT_SYMBOL(snd_mixer_oss_ioctl_card);
407
408#ifdef CONFIG_COMPAT
409/* all compatible */
410static long snd_mixer_oss_ioctl_compat(struct file *file, unsigned int cmd,
411 unsigned long arg)
412{
413 return snd_mixer_oss_ioctl1(file->private_data, cmd,
414 (unsigned long)compat_ptr(arg));
415}
416#else
417#define snd_mixer_oss_ioctl_compat NULL
418#endif
419
420/*
421 * REGISTRATION PART
422 */
423
424static const struct file_operations snd_mixer_oss_f_ops =
425{
426 .owner = THIS_MODULE,
427 .open = snd_mixer_oss_open,
428 .release = snd_mixer_oss_release,
429 .llseek = no_llseek,
430 .unlocked_ioctl = snd_mixer_oss_ioctl,
431 .compat_ioctl = snd_mixer_oss_ioctl_compat,
432};
433
434/*
435 * utilities
436 */
437
438static long snd_mixer_oss_conv(long val, long omin, long omax, long nmin, long nmax)
439{
440 long orange = omax - omin, nrange = nmax - nmin;
441
442 if (orange == 0)
443 return 0;
444 return DIV_ROUND_CLOSEST(nrange * (val - omin), orange) + nmin;
445}
446
447/* convert from alsa native to oss values (0-100) */
448static long snd_mixer_oss_conv1(long val, long min, long max, int *old)
449{
450 if (val == snd_mixer_oss_conv(*old, 0, 100, min, max))
451 return *old;
452 return snd_mixer_oss_conv(val, min, max, 0, 100);
453}
454
455/* convert from oss to alsa native values */
456static long snd_mixer_oss_conv2(long val, long min, long max)
457{
458 return snd_mixer_oss_conv(val, 0, 100, min, max);
459}
460
461#if 0
462static void snd_mixer_oss_recsrce_set(struct snd_card *card, int slot)
463{
464 struct snd_mixer_oss *mixer = card->mixer_oss;
465 if (mixer)
466 mixer->mask_recsrc |= 1 << slot;
467}
468
469static int snd_mixer_oss_recsrce_get(struct snd_card *card, int slot)
470{
471 struct snd_mixer_oss *mixer = card->mixer_oss;
472 if (mixer && (mixer->mask_recsrc & (1 << slot)))
473 return 1;
474 return 0;
475}
476#endif
477
478#define SNDRV_MIXER_OSS_SIGNATURE 0x65999250
479
480#define SNDRV_MIXER_OSS_ITEM_GLOBAL 0
481#define SNDRV_MIXER_OSS_ITEM_GSWITCH 1
482#define SNDRV_MIXER_OSS_ITEM_GROUTE 2
483#define SNDRV_MIXER_OSS_ITEM_GVOLUME 3
484#define SNDRV_MIXER_OSS_ITEM_PSWITCH 4
485#define SNDRV_MIXER_OSS_ITEM_PROUTE 5
486#define SNDRV_MIXER_OSS_ITEM_PVOLUME 6
487#define SNDRV_MIXER_OSS_ITEM_CSWITCH 7
488#define SNDRV_MIXER_OSS_ITEM_CROUTE 8
489#define SNDRV_MIXER_OSS_ITEM_CVOLUME 9
490#define SNDRV_MIXER_OSS_ITEM_CAPTURE 10
491
492#define SNDRV_MIXER_OSS_ITEM_COUNT 11
493
494#define SNDRV_MIXER_OSS_PRESENT_GLOBAL (1<<0)
495#define SNDRV_MIXER_OSS_PRESENT_GSWITCH (1<<1)
496#define SNDRV_MIXER_OSS_PRESENT_GROUTE (1<<2)
497#define SNDRV_MIXER_OSS_PRESENT_GVOLUME (1<<3)
498#define SNDRV_MIXER_OSS_PRESENT_PSWITCH (1<<4)
499#define SNDRV_MIXER_OSS_PRESENT_PROUTE (1<<5)
500#define SNDRV_MIXER_OSS_PRESENT_PVOLUME (1<<6)
501#define SNDRV_MIXER_OSS_PRESENT_CSWITCH (1<<7)
502#define SNDRV_MIXER_OSS_PRESENT_CROUTE (1<<8)
503#define SNDRV_MIXER_OSS_PRESENT_CVOLUME (1<<9)
504#define SNDRV_MIXER_OSS_PRESENT_CAPTURE (1<<10)
505
506struct slot {
507 unsigned int signature;
508 unsigned int present;
509 unsigned int channels;
510 unsigned int numid[SNDRV_MIXER_OSS_ITEM_COUNT];
511 unsigned int capture_item;
512 const struct snd_mixer_oss_assign_table *assigned;
513 unsigned int allocated: 1;
514};
515
516#define ID_UNKNOWN ((unsigned int)-1)
517
518static struct snd_kcontrol *snd_mixer_oss_test_id(struct snd_mixer_oss *mixer, const char *name, int index)
519{
520 struct snd_card *card = mixer->card;
521 struct snd_ctl_elem_id id;
522
523 memset(&id, 0, sizeof(id));
524 id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
525 strscpy(id.name, name, sizeof(id.name));
526 id.index = index;
527 return snd_ctl_find_id_locked(card, &id);
528}
529
530static void snd_mixer_oss_get_volume1_vol(struct snd_mixer_oss_file *fmixer,
531 struct snd_mixer_oss_slot *pslot,
532 unsigned int numid,
533 int *left, int *right)
534{
535 struct snd_ctl_elem_info *uinfo;
536 struct snd_ctl_elem_value *uctl;
537 struct snd_kcontrol *kctl;
538 struct snd_card *card = fmixer->card;
539
540 if (numid == ID_UNKNOWN)
541 return;
542 down_read(&card->controls_rwsem);
543 kctl = snd_ctl_find_numid_locked(card, numid);
544 if (!kctl) {
545 up_read(&card->controls_rwsem);
546 return;
547 }
548 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
549 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
550 if (uinfo == NULL || uctl == NULL)
551 goto __unalloc;
552 if (kctl->info(kctl, uinfo))
553 goto __unalloc;
554 if (kctl->get(kctl, uctl))
555 goto __unalloc;
556 if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
557 uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
558 goto __unalloc;
559 *left = snd_mixer_oss_conv1(uctl->value.integer.value[0], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[0]);
560 if (uinfo->count > 1)
561 *right = snd_mixer_oss_conv1(uctl->value.integer.value[1], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[1]);
562 __unalloc:
563 up_read(&card->controls_rwsem);
564 kfree(uctl);
565 kfree(uinfo);
566}
567
568static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer,
569 struct snd_mixer_oss_slot *pslot,
570 unsigned int numid,
571 int *left, int *right,
572 int route)
573{
574 struct snd_ctl_elem_info *uinfo;
575 struct snd_ctl_elem_value *uctl;
576 struct snd_kcontrol *kctl;
577 struct snd_card *card = fmixer->card;
578
579 if (numid == ID_UNKNOWN)
580 return;
581 down_read(&card->controls_rwsem);
582 kctl = snd_ctl_find_numid_locked(card, numid);
583 if (!kctl) {
584 up_read(&card->controls_rwsem);
585 return;
586 }
587 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
588 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
589 if (uinfo == NULL || uctl == NULL)
590 goto __unalloc;
591 if (kctl->info(kctl, uinfo))
592 goto __unalloc;
593 if (kctl->get(kctl, uctl))
594 goto __unalloc;
595 if (!uctl->value.integer.value[0]) {
596 *left = 0;
597 if (uinfo->count == 1)
598 *right = 0;
599 }
600 if (uinfo->count > 1 && !uctl->value.integer.value[route ? 3 : 1])
601 *right = 0;
602 __unalloc:
603 up_read(&card->controls_rwsem);
604 kfree(uctl);
605 kfree(uinfo);
606}
607
608static int snd_mixer_oss_get_volume1(struct snd_mixer_oss_file *fmixer,
609 struct snd_mixer_oss_slot *pslot,
610 int *left, int *right)
611{
612 struct slot *slot = pslot->private_data;
613
614 *left = *right = 100;
615 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
616 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
617 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
618 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
619 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
620 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
621 }
622 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
623 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
624 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
625 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
626 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
627 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
628 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
629 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
630 }
631 return 0;
632}
633
634static void snd_mixer_oss_put_volume1_vol(struct snd_mixer_oss_file *fmixer,
635 struct snd_mixer_oss_slot *pslot,
636 unsigned int numid,
637 int left, int right)
638{
639 struct snd_ctl_elem_info *uinfo;
640 struct snd_ctl_elem_value *uctl;
641 struct snd_kcontrol *kctl;
642 struct snd_card *card = fmixer->card;
643 int res;
644
645 if (numid == ID_UNKNOWN)
646 return;
647 down_read(&card->controls_rwsem);
648 kctl = snd_ctl_find_numid_locked(card, numid);
649 if (!kctl) {
650 up_read(&card->controls_rwsem);
651 return;
652 }
653 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
654 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
655 if (uinfo == NULL || uctl == NULL)
656 goto __unalloc;
657 if (kctl->info(kctl, uinfo))
658 goto __unalloc;
659 if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
660 uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
661 goto __unalloc;
662 uctl->value.integer.value[0] = snd_mixer_oss_conv2(left, uinfo->value.integer.min, uinfo->value.integer.max);
663 if (uinfo->count > 1)
664 uctl->value.integer.value[1] = snd_mixer_oss_conv2(right, uinfo->value.integer.min, uinfo->value.integer.max);
665 res = kctl->put(kctl, uctl);
666 if (res < 0)
667 goto __unalloc;
668 if (res > 0)
669 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
670 __unalloc:
671 up_read(&card->controls_rwsem);
672 kfree(uctl);
673 kfree(uinfo);
674}
675
676static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer,
677 struct snd_mixer_oss_slot *pslot,
678 unsigned int numid,
679 int left, int right,
680 int route)
681{
682 struct snd_ctl_elem_info *uinfo;
683 struct snd_ctl_elem_value *uctl;
684 struct snd_kcontrol *kctl;
685 struct snd_card *card = fmixer->card;
686 int res;
687
688 if (numid == ID_UNKNOWN)
689 return;
690 down_read(&card->controls_rwsem);
691 kctl = snd_ctl_find_numid_locked(card, numid);
692 if (!kctl) {
693 up_read(&card->controls_rwsem);
694 return;
695 }
696 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
697 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
698 if (uinfo == NULL || uctl == NULL)
699 goto __unalloc;
700 if (kctl->info(kctl, uinfo))
701 goto __unalloc;
702 if (uinfo->count > 1) {
703 uctl->value.integer.value[0] = left > 0 ? 1 : 0;
704 uctl->value.integer.value[route ? 3 : 1] = right > 0 ? 1 : 0;
705 if (route) {
706 uctl->value.integer.value[1] =
707 uctl->value.integer.value[2] = 0;
708 }
709 } else {
710 uctl->value.integer.value[0] = (left > 0 || right > 0) ? 1 : 0;
711 }
712 res = kctl->put(kctl, uctl);
713 if (res < 0)
714 goto __unalloc;
715 if (res > 0)
716 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
717 __unalloc:
718 up_read(&card->controls_rwsem);
719 kfree(uctl);
720 kfree(uinfo);
721}
722
723static int snd_mixer_oss_put_volume1(struct snd_mixer_oss_file *fmixer,
724 struct snd_mixer_oss_slot *pslot,
725 int left, int right)
726{
727 struct slot *slot = pslot->private_data;
728
729 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
730 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
731 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME)
732 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
733 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) {
734 snd_mixer_oss_put_volume1_vol(fmixer, pslot,
735 slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
736 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
737 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
738 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
739 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
740 }
741 if (left || right) {
742 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH)
743 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
744 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH)
745 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
746 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH)
747 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
748 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE)
749 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
750 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE)
751 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
752 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE)
753 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
754 } else {
755 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
756 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
757 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
758 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
759 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
760 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
761 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
762 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
763 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
764 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
765 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
766 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
767 }
768 }
769 return 0;
770}
771
772static int snd_mixer_oss_get_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
773 struct snd_mixer_oss_slot *pslot,
774 int *active)
775{
776 struct slot *slot = pslot->private_data;
777 int left, right;
778
779 left = right = 1;
780 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], &left, &right, 0);
781 *active = (left || right) ? 1 : 0;
782 return 0;
783}
784
785static int snd_mixer_oss_get_recsrc1_route(struct snd_mixer_oss_file *fmixer,
786 struct snd_mixer_oss_slot *pslot,
787 int *active)
788{
789 struct slot *slot = pslot->private_data;
790 int left, right;
791
792 left = right = 1;
793 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], &left, &right, 1);
794 *active = (left || right) ? 1 : 0;
795 return 0;
796}
797
798static int snd_mixer_oss_put_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
799 struct snd_mixer_oss_slot *pslot,
800 int active)
801{
802 struct slot *slot = pslot->private_data;
803
804 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], active, active, 0);
805 return 0;
806}
807
808static int snd_mixer_oss_put_recsrc1_route(struct snd_mixer_oss_file *fmixer,
809 struct snd_mixer_oss_slot *pslot,
810 int active)
811{
812 struct slot *slot = pslot->private_data;
813
814 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], active, active, 1);
815 return 0;
816}
817
818static int snd_mixer_oss_get_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int *active_index)
819{
820 struct snd_card *card = fmixer->card;
821 struct snd_mixer_oss *mixer = fmixer->mixer;
822 struct snd_kcontrol *kctl;
823 struct snd_mixer_oss_slot *pslot;
824 struct slot *slot;
825 struct snd_ctl_elem_info *uinfo;
826 struct snd_ctl_elem_value *uctl;
827 int err, idx;
828
829 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
830 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
831 if (uinfo == NULL || uctl == NULL) {
832 err = -ENOMEM;
833 goto __free_only;
834 }
835 down_read(&card->controls_rwsem);
836 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
837 if (! kctl) {
838 err = -ENOENT;
839 goto __unlock;
840 }
841 err = kctl->info(kctl, uinfo);
842 if (err < 0)
843 goto __unlock;
844 err = kctl->get(kctl, uctl);
845 if (err < 0)
846 goto __unlock;
847 for (idx = 0; idx < 32; idx++) {
848 if (!(mixer->mask_recsrc & (1 << idx)))
849 continue;
850 pslot = &mixer->slots[idx];
851 slot = pslot->private_data;
852 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
853 continue;
854 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
855 continue;
856 if (slot->capture_item == uctl->value.enumerated.item[0]) {
857 *active_index = idx;
858 break;
859 }
860 }
861 err = 0;
862 __unlock:
863 up_read(&card->controls_rwsem);
864 __free_only:
865 kfree(uctl);
866 kfree(uinfo);
867 return err;
868}
869
870static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int active_index)
871{
872 struct snd_card *card = fmixer->card;
873 struct snd_mixer_oss *mixer = fmixer->mixer;
874 struct snd_kcontrol *kctl;
875 struct snd_mixer_oss_slot *pslot;
876 struct slot *slot = NULL;
877 struct snd_ctl_elem_info *uinfo;
878 struct snd_ctl_elem_value *uctl;
879 int err;
880 unsigned int idx;
881
882 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
883 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
884 if (uinfo == NULL || uctl == NULL) {
885 err = -ENOMEM;
886 goto __free_only;
887 }
888 down_read(&card->controls_rwsem);
889 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
890 if (! kctl) {
891 err = -ENOENT;
892 goto __unlock;
893 }
894 err = kctl->info(kctl, uinfo);
895 if (err < 0)
896 goto __unlock;
897 for (idx = 0; idx < 32; idx++) {
898 if (!(mixer->mask_recsrc & (1 << idx)))
899 continue;
900 pslot = &mixer->slots[idx];
901 slot = pslot->private_data;
902 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
903 continue;
904 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
905 continue;
906 if (idx == active_index)
907 break;
908 slot = NULL;
909 }
910 if (! slot)
911 goto __unlock;
912 for (idx = 0; idx < uinfo->count; idx++)
913 uctl->value.enumerated.item[idx] = slot->capture_item;
914 err = kctl->put(kctl, uctl);
915 if (err > 0)
916 snd_ctl_notify(fmixer->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
917 err = 0;
918 __unlock:
919 up_read(&card->controls_rwsem);
920 __free_only:
921 kfree(uctl);
922 kfree(uinfo);
923 return err;
924}
925
926struct snd_mixer_oss_assign_table {
927 int oss_id;
928 const char *name;
929 int index;
930};
931
932static int snd_mixer_oss_build_test(struct snd_mixer_oss *mixer, struct slot *slot, const char *name, int index, int item)
933{
934 struct snd_ctl_elem_info *info;
935 struct snd_kcontrol *kcontrol;
936 struct snd_card *card = mixer->card;
937 int err;
938
939 down_read(&card->controls_rwsem);
940 kcontrol = snd_mixer_oss_test_id(mixer, name, index);
941 if (kcontrol == NULL) {
942 up_read(&card->controls_rwsem);
943 return 0;
944 }
945 info = kmalloc(sizeof(*info), GFP_KERNEL);
946 if (! info) {
947 up_read(&card->controls_rwsem);
948 return -ENOMEM;
949 }
950 err = kcontrol->info(kcontrol, info);
951 if (err < 0) {
952 up_read(&card->controls_rwsem);
953 kfree(info);
954 return err;
955 }
956 slot->numid[item] = kcontrol->id.numid;
957 up_read(&card->controls_rwsem);
958 if (info->count > slot->channels)
959 slot->channels = info->count;
960 slot->present |= 1 << item;
961 kfree(info);
962 return 0;
963}
964
965static void snd_mixer_oss_slot_free(struct snd_mixer_oss_slot *chn)
966{
967 struct slot *p = chn->private_data;
968 if (p) {
969 if (p->allocated && p->assigned) {
970 kfree_const(p->assigned->name);
971 kfree_const(p->assigned);
972 }
973 kfree(p);
974 }
975}
976
977static void mixer_slot_clear(struct snd_mixer_oss_slot *rslot)
978{
979 int idx = rslot->number; /* remember this */
980 if (rslot->private_free)
981 rslot->private_free(rslot);
982 memset(rslot, 0, sizeof(*rslot));
983 rslot->number = idx;
984}
985
986/* In a separate function to keep gcc 3.2 happy - do NOT merge this in
987 snd_mixer_oss_build_input! */
988static int snd_mixer_oss_build_test_all(struct snd_mixer_oss *mixer,
989 const struct snd_mixer_oss_assign_table *ptr,
990 struct slot *slot)
991{
992 char str[64];
993 int err;
994
995 err = snd_mixer_oss_build_test(mixer, slot, ptr->name, ptr->index,
996 SNDRV_MIXER_OSS_ITEM_GLOBAL);
997 if (err)
998 return err;
999 sprintf(str, "%s Switch", ptr->name);
1000 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1001 SNDRV_MIXER_OSS_ITEM_GSWITCH);
1002 if (err)
1003 return err;
1004 sprintf(str, "%s Route", ptr->name);
1005 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1006 SNDRV_MIXER_OSS_ITEM_GROUTE);
1007 if (err)
1008 return err;
1009 sprintf(str, "%s Volume", ptr->name);
1010 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1011 SNDRV_MIXER_OSS_ITEM_GVOLUME);
1012 if (err)
1013 return err;
1014 sprintf(str, "%s Playback Switch", ptr->name);
1015 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1016 SNDRV_MIXER_OSS_ITEM_PSWITCH);
1017 if (err)
1018 return err;
1019 sprintf(str, "%s Playback Route", ptr->name);
1020 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1021 SNDRV_MIXER_OSS_ITEM_PROUTE);
1022 if (err)
1023 return err;
1024 sprintf(str, "%s Playback Volume", ptr->name);
1025 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1026 SNDRV_MIXER_OSS_ITEM_PVOLUME);
1027 if (err)
1028 return err;
1029 sprintf(str, "%s Capture Switch", ptr->name);
1030 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1031 SNDRV_MIXER_OSS_ITEM_CSWITCH);
1032 if (err)
1033 return err;
1034 sprintf(str, "%s Capture Route", ptr->name);
1035 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1036 SNDRV_MIXER_OSS_ITEM_CROUTE);
1037 if (err)
1038 return err;
1039 sprintf(str, "%s Capture Volume", ptr->name);
1040 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
1041 SNDRV_MIXER_OSS_ITEM_CVOLUME);
1042 if (err)
1043 return err;
1044
1045 return 0;
1046}
1047
1048/*
1049 * build an OSS mixer element.
1050 * ptr_allocated means the entry is dynamically allocated (change via proc file).
1051 * when replace_old = 1, the old entry is replaced with the new one.
1052 */
1053static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer,
1054 const struct snd_mixer_oss_assign_table *ptr,
1055 int ptr_allocated, int replace_old)
1056{
1057 struct slot slot;
1058 struct slot *pslot;
1059 struct snd_kcontrol *kctl;
1060 struct snd_mixer_oss_slot *rslot;
1061 char str[64];
1062
1063 /* check if already assigned */
1064 if (mixer->slots[ptr->oss_id].get_volume && ! replace_old)
1065 return 0;
1066
1067 memset(&slot, 0, sizeof(slot));
1068 memset(slot.numid, 0xff, sizeof(slot.numid)); /* ID_UNKNOWN */
1069 if (snd_mixer_oss_build_test_all(mixer, ptr, &slot))
1070 return 0;
1071 down_read(&mixer->card->controls_rwsem);
1072 kctl = NULL;
1073 if (!ptr->index)
1074 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
1075 if (kctl) {
1076 struct snd_ctl_elem_info *uinfo;
1077
1078 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
1079 if (! uinfo) {
1080 up_read(&mixer->card->controls_rwsem);
1081 return -ENOMEM;
1082 }
1083
1084 if (kctl->info(kctl, uinfo)) {
1085 up_read(&mixer->card->controls_rwsem);
1086 kfree(uinfo);
1087 return 0;
1088 }
1089 strcpy(str, ptr->name);
1090 if (!strcmp(str, "Master"))
1091 strcpy(str, "Mix");
1092 if (!strcmp(str, "Master Mono"))
1093 strcpy(str, "Mix Mono");
1094 slot.capture_item = 0;
1095 if (!strcmp(uinfo->value.enumerated.name, str)) {
1096 slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1097 } else {
1098 for (slot.capture_item = 1; slot.capture_item < uinfo->value.enumerated.items; slot.capture_item++) {
1099 uinfo->value.enumerated.item = slot.capture_item;
1100 if (kctl->info(kctl, uinfo)) {
1101 up_read(&mixer->card->controls_rwsem);
1102 kfree(uinfo);
1103 return 0;
1104 }
1105 if (!strcmp(uinfo->value.enumerated.name, str)) {
1106 slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1107 break;
1108 }
1109 }
1110 }
1111 kfree(uinfo);
1112 }
1113 up_read(&mixer->card->controls_rwsem);
1114 if (slot.present != 0) {
1115 pslot = kmalloc(sizeof(slot), GFP_KERNEL);
1116 if (! pslot)
1117 return -ENOMEM;
1118 *pslot = slot;
1119 pslot->signature = SNDRV_MIXER_OSS_SIGNATURE;
1120 pslot->assigned = ptr;
1121 pslot->allocated = ptr_allocated;
1122 rslot = &mixer->slots[ptr->oss_id];
1123 mixer_slot_clear(rslot);
1124 rslot->stereo = slot.channels > 1 ? 1 : 0;
1125 rslot->get_volume = snd_mixer_oss_get_volume1;
1126 rslot->put_volume = snd_mixer_oss_put_volume1;
1127 /* note: ES18xx have both Capture Source and XX Capture Volume !!! */
1128 if (slot.present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
1129 rslot->get_recsrc = snd_mixer_oss_get_recsrc1_sw;
1130 rslot->put_recsrc = snd_mixer_oss_put_recsrc1_sw;
1131 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
1132 rslot->get_recsrc = snd_mixer_oss_get_recsrc1_route;
1133 rslot->put_recsrc = snd_mixer_oss_put_recsrc1_route;
1134 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CAPTURE) {
1135 mixer->mask_recsrc |= 1 << ptr->oss_id;
1136 }
1137 rslot->private_data = pslot;
1138 rslot->private_free = snd_mixer_oss_slot_free;
1139 return 1;
1140 }
1141 return 0;
1142}
1143
1144#ifdef CONFIG_SND_PROC_FS
1145/*
1146 */
1147#define MIXER_VOL(name) [SOUND_MIXER_##name] = #name
1148static const char * const oss_mixer_names[SNDRV_OSS_MAX_MIXERS] = {
1149 MIXER_VOL(VOLUME),
1150 MIXER_VOL(BASS),
1151 MIXER_VOL(TREBLE),
1152 MIXER_VOL(SYNTH),
1153 MIXER_VOL(PCM),
1154 MIXER_VOL(SPEAKER),
1155 MIXER_VOL(LINE),
1156 MIXER_VOL(MIC),
1157 MIXER_VOL(CD),
1158 MIXER_VOL(IMIX),
1159 MIXER_VOL(ALTPCM),
1160 MIXER_VOL(RECLEV),
1161 MIXER_VOL(IGAIN),
1162 MIXER_VOL(OGAIN),
1163 MIXER_VOL(LINE1),
1164 MIXER_VOL(LINE2),
1165 MIXER_VOL(LINE3),
1166 MIXER_VOL(DIGITAL1),
1167 MIXER_VOL(DIGITAL2),
1168 MIXER_VOL(DIGITAL3),
1169 MIXER_VOL(PHONEIN),
1170 MIXER_VOL(PHONEOUT),
1171 MIXER_VOL(VIDEO),
1172 MIXER_VOL(RADIO),
1173 MIXER_VOL(MONITOR),
1174};
1175
1176/*
1177 * /proc interface
1178 */
1179
1180static void snd_mixer_oss_proc_read(struct snd_info_entry *entry,
1181 struct snd_info_buffer *buffer)
1182{
1183 struct snd_mixer_oss *mixer = entry->private_data;
1184 int i;
1185
1186 mutex_lock(&mixer->reg_mutex);
1187 for (i = 0; i < SNDRV_OSS_MAX_MIXERS; i++) {
1188 struct slot *p;
1189
1190 if (! oss_mixer_names[i])
1191 continue;
1192 p = (struct slot *)mixer->slots[i].private_data;
1193 snd_iprintf(buffer, "%s ", oss_mixer_names[i]);
1194 if (p && p->assigned)
1195 snd_iprintf(buffer, "\"%s\" %d\n",
1196 p->assigned->name,
1197 p->assigned->index);
1198 else
1199 snd_iprintf(buffer, "\"\" 0\n");
1200 }
1201 mutex_unlock(&mixer->reg_mutex);
1202}
1203
1204static void snd_mixer_oss_proc_write(struct snd_info_entry *entry,
1205 struct snd_info_buffer *buffer)
1206{
1207 struct snd_mixer_oss *mixer = entry->private_data;
1208 char line[128], str[32], idxstr[16];
1209 const char *cptr;
1210 unsigned int idx;
1211 int ch;
1212 struct snd_mixer_oss_assign_table *tbl;
1213 struct slot *slot;
1214
1215 while (!snd_info_get_line(buffer, line, sizeof(line))) {
1216 cptr = snd_info_get_str(str, line, sizeof(str));
1217 for (ch = 0; ch < SNDRV_OSS_MAX_MIXERS; ch++)
1218 if (oss_mixer_names[ch] && strcmp(oss_mixer_names[ch], str) == 0)
1219 break;
1220 if (ch >= SNDRV_OSS_MAX_MIXERS) {
1221 pr_err("ALSA: mixer_oss: invalid OSS volume '%s'\n",
1222 str);
1223 continue;
1224 }
1225 cptr = snd_info_get_str(str, cptr, sizeof(str));
1226 if (! *str) {
1227 /* remove the entry */
1228 mutex_lock(&mixer->reg_mutex);
1229 mixer_slot_clear(&mixer->slots[ch]);
1230 mutex_unlock(&mixer->reg_mutex);
1231 continue;
1232 }
1233 snd_info_get_str(idxstr, cptr, sizeof(idxstr));
1234 idx = simple_strtoul(idxstr, NULL, 10);
1235 if (idx >= 0x4000) { /* too big */
1236 pr_err("ALSA: mixer_oss: invalid index %d\n", idx);
1237 continue;
1238 }
1239 mutex_lock(&mixer->reg_mutex);
1240 slot = (struct slot *)mixer->slots[ch].private_data;
1241 if (slot && slot->assigned &&
1242 slot->assigned->index == idx && ! strcmp(slot->assigned->name, str))
1243 /* not changed */
1244 goto __unlock;
1245 tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
1246 if (!tbl)
1247 goto __unlock;
1248 tbl->oss_id = ch;
1249 tbl->name = kstrdup(str, GFP_KERNEL);
1250 if (! tbl->name) {
1251 kfree(tbl);
1252 goto __unlock;
1253 }
1254 tbl->index = idx;
1255 if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) {
1256 kfree(tbl->name);
1257 kfree(tbl);
1258 }
1259 __unlock:
1260 mutex_unlock(&mixer->reg_mutex);
1261 }
1262}
1263
1264static void snd_mixer_oss_proc_init(struct snd_mixer_oss *mixer)
1265{
1266 struct snd_info_entry *entry;
1267
1268 entry = snd_info_create_card_entry(mixer->card, "oss_mixer",
1269 mixer->card->proc_root);
1270 if (! entry)
1271 return;
1272 entry->content = SNDRV_INFO_CONTENT_TEXT;
1273 entry->mode = S_IFREG | 0644;
1274 entry->c.text.read = snd_mixer_oss_proc_read;
1275 entry->c.text.write = snd_mixer_oss_proc_write;
1276 entry->private_data = mixer;
1277 if (snd_info_register(entry) < 0) {
1278 snd_info_free_entry(entry);
1279 entry = NULL;
1280 }
1281 mixer->proc_entry = entry;
1282}
1283
1284static void snd_mixer_oss_proc_done(struct snd_mixer_oss *mixer)
1285{
1286 snd_info_free_entry(mixer->proc_entry);
1287 mixer->proc_entry = NULL;
1288}
1289#else /* !CONFIG_SND_PROC_FS */
1290#define snd_mixer_oss_proc_init(mix)
1291#define snd_mixer_oss_proc_done(mix)
1292#endif /* CONFIG_SND_PROC_FS */
1293
1294static void snd_mixer_oss_build(struct snd_mixer_oss *mixer)
1295{
1296 static const struct snd_mixer_oss_assign_table table[] = {
1297 { SOUND_MIXER_VOLUME, "Master", 0 },
1298 { SOUND_MIXER_VOLUME, "Front", 0 }, /* fallback */
1299 { SOUND_MIXER_BASS, "Tone Control - Bass", 0 },
1300 { SOUND_MIXER_TREBLE, "Tone Control - Treble", 0 },
1301 { SOUND_MIXER_SYNTH, "Synth", 0 },
1302 { SOUND_MIXER_SYNTH, "FM", 0 }, /* fallback */
1303 { SOUND_MIXER_SYNTH, "Music", 0 }, /* fallback */
1304 { SOUND_MIXER_PCM, "PCM", 0 },
1305 { SOUND_MIXER_SPEAKER, "Beep", 0 },
1306 { SOUND_MIXER_SPEAKER, "PC Speaker", 0 }, /* fallback */
1307 { SOUND_MIXER_SPEAKER, "Speaker", 0 }, /* fallback */
1308 { SOUND_MIXER_LINE, "Line", 0 },
1309 { SOUND_MIXER_MIC, "Mic", 0 },
1310 { SOUND_MIXER_CD, "CD", 0 },
1311 { SOUND_MIXER_IMIX, "Monitor Mix", 0 },
1312 { SOUND_MIXER_ALTPCM, "PCM", 1 },
1313 { SOUND_MIXER_ALTPCM, "Headphone", 0 }, /* fallback */
1314 { SOUND_MIXER_ALTPCM, "Wave", 0 }, /* fallback */
1315 { SOUND_MIXER_RECLEV, "-- nothing --", 0 },
1316 { SOUND_MIXER_IGAIN, "Capture", 0 },
1317 { SOUND_MIXER_OGAIN, "Playback", 0 },
1318 { SOUND_MIXER_LINE1, "Aux", 0 },
1319 { SOUND_MIXER_LINE2, "Aux", 1 },
1320 { SOUND_MIXER_LINE3, "Aux", 2 },
1321 { SOUND_MIXER_DIGITAL1, "Digital", 0 },
1322 { SOUND_MIXER_DIGITAL1, "IEC958", 0 }, /* fallback */
1323 { SOUND_MIXER_DIGITAL1, "IEC958 Optical", 0 }, /* fallback */
1324 { SOUND_MIXER_DIGITAL1, "IEC958 Coaxial", 0 }, /* fallback */
1325 { SOUND_MIXER_DIGITAL2, "Digital", 1 },
1326 { SOUND_MIXER_DIGITAL3, "Digital", 2 },
1327 { SOUND_MIXER_PHONEIN, "Phone", 0 },
1328 { SOUND_MIXER_PHONEOUT, "Master Mono", 0 },
1329 { SOUND_MIXER_PHONEOUT, "Speaker", 0 }, /*fallback*/
1330 { SOUND_MIXER_PHONEOUT, "Mono", 0 }, /*fallback*/
1331 { SOUND_MIXER_PHONEOUT, "Phone", 0 }, /* fallback */
1332 { SOUND_MIXER_VIDEO, "Video", 0 },
1333 { SOUND_MIXER_RADIO, "Radio", 0 },
1334 { SOUND_MIXER_MONITOR, "Monitor", 0 }
1335 };
1336 unsigned int idx;
1337
1338 for (idx = 0; idx < ARRAY_SIZE(table); idx++)
1339 snd_mixer_oss_build_input(mixer, &table[idx], 0, 0);
1340 if (mixer->mask_recsrc) {
1341 mixer->get_recsrc = snd_mixer_oss_get_recsrc2;
1342 mixer->put_recsrc = snd_mixer_oss_put_recsrc2;
1343 }
1344}
1345
1346/*
1347 *
1348 */
1349
1350static int snd_mixer_oss_free1(void *private)
1351{
1352 struct snd_mixer_oss *mixer = private;
1353 struct snd_card *card;
1354 int idx;
1355
1356 if (!mixer)
1357 return 0;
1358 card = mixer->card;
1359 if (snd_BUG_ON(mixer != card->mixer_oss))
1360 return -ENXIO;
1361 card->mixer_oss = NULL;
1362 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) {
1363 struct snd_mixer_oss_slot *chn = &mixer->slots[idx];
1364 if (chn->private_free)
1365 chn->private_free(chn);
1366 }
1367 kfree(mixer);
1368 return 0;
1369}
1370
1371static int snd_mixer_oss_notify_handler(struct snd_card *card, int cmd)
1372{
1373 struct snd_mixer_oss *mixer;
1374
1375 if (cmd == SND_MIXER_OSS_NOTIFY_REGISTER) {
1376 int idx, err;
1377
1378 mixer = kcalloc(2, sizeof(*mixer), GFP_KERNEL);
1379 if (mixer == NULL)
1380 return -ENOMEM;
1381 mutex_init(&mixer->reg_mutex);
1382 err = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER,
1383 card, 0,
1384 &snd_mixer_oss_f_ops, card);
1385 if (err < 0) {
1386 dev_err(card->dev,
1387 "unable to register OSS mixer device %i:%i\n",
1388 card->number, 0);
1389 kfree(mixer);
1390 return err;
1391 }
1392 mixer->oss_dev_alloc = 1;
1393 mixer->card = card;
1394 if (*card->mixername)
1395 strscpy(mixer->name, card->mixername, sizeof(mixer->name));
1396 else
1397 snprintf(mixer->name, sizeof(mixer->name),
1398 "mixer%i", card->number);
1399#ifdef SNDRV_OSS_INFO_DEV_MIXERS
1400 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIXERS,
1401 card->number,
1402 mixer->name);
1403#endif
1404 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++)
1405 mixer->slots[idx].number = idx;
1406 card->mixer_oss = mixer;
1407 snd_mixer_oss_build(mixer);
1408 snd_mixer_oss_proc_init(mixer);
1409 } else {
1410 mixer = card->mixer_oss;
1411 if (mixer == NULL)
1412 return 0;
1413 if (mixer->oss_dev_alloc) {
1414#ifdef SNDRV_OSS_INFO_DEV_MIXERS
1415 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIXERS, mixer->card->number);
1416#endif
1417 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, mixer->card, 0);
1418 mixer->oss_dev_alloc = 0;
1419 }
1420 if (cmd == SND_MIXER_OSS_NOTIFY_DISCONNECT)
1421 return 0;
1422 snd_mixer_oss_proc_done(mixer);
1423 return snd_mixer_oss_free1(mixer);
1424 }
1425 return 0;
1426}
1427
1428static int __init alsa_mixer_oss_init(void)
1429{
1430 struct snd_card *card;
1431 int idx;
1432
1433 snd_mixer_oss_notify_callback = snd_mixer_oss_notify_handler;
1434 for (idx = 0; idx < SNDRV_CARDS; idx++) {
1435 card = snd_card_ref(idx);
1436 if (card) {
1437 snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_REGISTER);
1438 snd_card_unref(card);
1439 }
1440 }
1441 return 0;
1442}
1443
1444static void __exit alsa_mixer_oss_exit(void)
1445{
1446 struct snd_card *card;
1447 int idx;
1448
1449 snd_mixer_oss_notify_callback = NULL;
1450 for (idx = 0; idx < SNDRV_CARDS; idx++) {
1451 card = snd_card_ref(idx);
1452 if (card) {
1453 snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_FREE);
1454 snd_card_unref(card);
1455 }
1456 }
1457}
1458
1459module_init(alsa_mixer_oss_init)
1460module_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 guard(mutex)(&mixer->reg_mutex);
134 for (chn = 0; chn < 31; chn++) {
135 pslot = &mixer->slots[chn];
136 if (pslot->put_volume || pslot->put_recsrc)
137 result |= 1 << chn;
138 }
139 return result;
140}
141
142static int snd_mixer_oss_stereodevs(struct snd_mixer_oss_file *fmixer)
143{
144 struct snd_mixer_oss *mixer = fmixer->mixer;
145 struct snd_mixer_oss_slot *pslot;
146 int result = 0, chn;
147
148 if (mixer == NULL)
149 return -EIO;
150 guard(mutex)(&mixer->reg_mutex);
151 for (chn = 0; chn < 31; chn++) {
152 pslot = &mixer->slots[chn];
153 if (pslot->put_volume && pslot->stereo)
154 result |= 1 << chn;
155 }
156 return result;
157}
158
159static int snd_mixer_oss_recmask(struct snd_mixer_oss_file *fmixer)
160{
161 struct snd_mixer_oss *mixer = fmixer->mixer;
162 int result = 0;
163
164 if (mixer == NULL)
165 return -EIO;
166 guard(mutex)(&mixer->reg_mutex);
167 if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */
168 result = mixer->mask_recsrc;
169 } else {
170 struct snd_mixer_oss_slot *pslot;
171 int chn;
172 for (chn = 0; chn < 31; chn++) {
173 pslot = &mixer->slots[chn];
174 if (pslot->put_recsrc)
175 result |= 1 << chn;
176 }
177 }
178 return result;
179}
180
181static int snd_mixer_oss_get_recsrc(struct snd_mixer_oss_file *fmixer)
182{
183 struct snd_mixer_oss *mixer = fmixer->mixer;
184 int result = 0;
185
186 if (mixer == NULL)
187 return -EIO;
188 guard(mutex)(&mixer->reg_mutex);
189 if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */
190 unsigned int index;
191 result = mixer->get_recsrc(fmixer, &index);
192 if (result < 0)
193 return result;
194 result = 1 << index;
195 } else {
196 struct snd_mixer_oss_slot *pslot;
197 int chn;
198 for (chn = 0; chn < 31; chn++) {
199 pslot = &mixer->slots[chn];
200 if (pslot->get_recsrc) {
201 int active = 0;
202 pslot->get_recsrc(fmixer, pslot, &active);
203 if (active)
204 result |= 1 << chn;
205 }
206 }
207 }
208 mixer->oss_recsrc = result;
209 return result;
210}
211
212static int snd_mixer_oss_set_recsrc(struct snd_mixer_oss_file *fmixer, int recsrc)
213{
214 struct snd_mixer_oss *mixer = fmixer->mixer;
215 struct snd_mixer_oss_slot *pslot;
216 int chn, active;
217 unsigned int index;
218 int result = 0;
219
220 if (mixer == NULL)
221 return -EIO;
222 guard(mutex)(&mixer->reg_mutex);
223 if (mixer->get_recsrc && mixer->put_recsrc) { /* exclusive input */
224 if (recsrc & ~mixer->oss_recsrc)
225 recsrc &= ~mixer->oss_recsrc;
226 mixer->put_recsrc(fmixer, ffz(~recsrc));
227 mixer->get_recsrc(fmixer, &index);
228 result = 1 << index;
229 }
230 for (chn = 0; chn < 31; chn++) {
231 pslot = &mixer->slots[chn];
232 if (pslot->put_recsrc) {
233 active = (recsrc & (1 << chn)) ? 1 : 0;
234 pslot->put_recsrc(fmixer, pslot, active);
235 }
236 }
237 if (! result) {
238 for (chn = 0; chn < 31; chn++) {
239 pslot = &mixer->slots[chn];
240 if (pslot->get_recsrc) {
241 active = 0;
242 pslot->get_recsrc(fmixer, pslot, &active);
243 if (active)
244 result |= 1 << chn;
245 }
246 }
247 }
248 return result;
249}
250
251static int snd_mixer_oss_get_volume(struct snd_mixer_oss_file *fmixer, int slot)
252{
253 struct snd_mixer_oss *mixer = fmixer->mixer;
254 struct snd_mixer_oss_slot *pslot;
255 int result = 0, left, right;
256
257 if (mixer == NULL || slot > 30)
258 return -EIO;
259 guard(mutex)(&mixer->reg_mutex);
260 pslot = &mixer->slots[slot];
261 left = pslot->volume[0];
262 right = pslot->volume[1];
263 if (pslot->get_volume)
264 result = pslot->get_volume(fmixer, pslot, &left, &right);
265 if (!pslot->stereo)
266 right = left;
267 if (snd_BUG_ON(left < 0 || left > 100))
268 return -EIO;
269 if (snd_BUG_ON(right < 0 || right > 100))
270 return -EIO;
271 if (result >= 0) {
272 pslot->volume[0] = left;
273 pslot->volume[1] = right;
274 result = (left & 0xff) | ((right & 0xff) << 8);
275 }
276 return result;
277}
278
279static int snd_mixer_oss_set_volume(struct snd_mixer_oss_file *fmixer,
280 int slot, int volume)
281{
282 struct snd_mixer_oss *mixer = fmixer->mixer;
283 struct snd_mixer_oss_slot *pslot;
284 int result = 0, left = volume & 0xff, right = (volume >> 8) & 0xff;
285
286 if (mixer == NULL || slot > 30)
287 return -EIO;
288 guard(mutex)(&mixer->reg_mutex);
289 pslot = &mixer->slots[slot];
290 if (left > 100)
291 left = 100;
292 if (right > 100)
293 right = 100;
294 if (!pslot->stereo)
295 right = left;
296 if (pslot->put_volume)
297 result = pslot->put_volume(fmixer, pslot, left, right);
298 if (result < 0)
299 return result;
300 pslot->volume[0] = left;
301 pslot->volume[1] = right;
302 result = (left & 0xff) | ((right & 0xff) << 8);
303 return result;
304}
305
306static int snd_mixer_oss_ioctl1(struct snd_mixer_oss_file *fmixer, unsigned int cmd, unsigned long arg)
307{
308 void __user *argp = (void __user *)arg;
309 int __user *p = argp;
310 int tmp;
311
312 if (snd_BUG_ON(!fmixer))
313 return -ENXIO;
314 if (((cmd >> 8) & 0xff) == 'M') {
315 switch (cmd) {
316 case SOUND_MIXER_INFO:
317 return snd_mixer_oss_info(fmixer, argp);
318 case SOUND_OLD_MIXER_INFO:
319 return snd_mixer_oss_info_obsolete(fmixer, argp);
320 case SOUND_MIXER_WRITE_RECSRC:
321 if (get_user(tmp, p))
322 return -EFAULT;
323 tmp = snd_mixer_oss_set_recsrc(fmixer, tmp);
324 if (tmp < 0)
325 return tmp;
326 return put_user(tmp, p);
327 case OSS_GETVERSION:
328 return put_user(SNDRV_OSS_VERSION, p);
329 case OSS_ALSAEMULVER:
330 return put_user(1, p);
331 case SOUND_MIXER_READ_DEVMASK:
332 tmp = snd_mixer_oss_devmask(fmixer);
333 if (tmp < 0)
334 return tmp;
335 return put_user(tmp, p);
336 case SOUND_MIXER_READ_STEREODEVS:
337 tmp = snd_mixer_oss_stereodevs(fmixer);
338 if (tmp < 0)
339 return tmp;
340 return put_user(tmp, p);
341 case SOUND_MIXER_READ_RECMASK:
342 tmp = snd_mixer_oss_recmask(fmixer);
343 if (tmp < 0)
344 return tmp;
345 return put_user(tmp, p);
346 case SOUND_MIXER_READ_CAPS:
347 tmp = snd_mixer_oss_caps(fmixer);
348 if (tmp < 0)
349 return tmp;
350 return put_user(tmp, p);
351 case SOUND_MIXER_READ_RECSRC:
352 tmp = snd_mixer_oss_get_recsrc(fmixer);
353 if (tmp < 0)
354 return tmp;
355 return put_user(tmp, p);
356 }
357 }
358 if (cmd & SIOC_IN) {
359 if (get_user(tmp, p))
360 return -EFAULT;
361 tmp = snd_mixer_oss_set_volume(fmixer, cmd & 0xff, tmp);
362 if (tmp < 0)
363 return tmp;
364 return put_user(tmp, p);
365 } else if (cmd & SIOC_OUT) {
366 tmp = snd_mixer_oss_get_volume(fmixer, cmd & 0xff);
367 if (tmp < 0)
368 return tmp;
369 return put_user(tmp, p);
370 }
371 return -ENXIO;
372}
373
374static long snd_mixer_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
375{
376 return snd_mixer_oss_ioctl1(file->private_data, cmd, arg);
377}
378
379int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg)
380{
381 struct snd_mixer_oss_file fmixer;
382
383 if (snd_BUG_ON(!card))
384 return -ENXIO;
385 if (card->mixer_oss == NULL)
386 return -ENXIO;
387 memset(&fmixer, 0, sizeof(fmixer));
388 fmixer.card = card;
389 fmixer.mixer = card->mixer_oss;
390 return snd_mixer_oss_ioctl1(&fmixer, cmd, arg);
391}
392EXPORT_SYMBOL(snd_mixer_oss_ioctl_card);
393
394#ifdef CONFIG_COMPAT
395/* all compatible */
396static long snd_mixer_oss_ioctl_compat(struct file *file, unsigned int cmd,
397 unsigned long arg)
398{
399 return snd_mixer_oss_ioctl1(file->private_data, cmd,
400 (unsigned long)compat_ptr(arg));
401}
402#else
403#define snd_mixer_oss_ioctl_compat NULL
404#endif
405
406/*
407 * REGISTRATION PART
408 */
409
410static const struct file_operations snd_mixer_oss_f_ops =
411{
412 .owner = THIS_MODULE,
413 .open = snd_mixer_oss_open,
414 .release = snd_mixer_oss_release,
415 .llseek = no_llseek,
416 .unlocked_ioctl = snd_mixer_oss_ioctl,
417 .compat_ioctl = snd_mixer_oss_ioctl_compat,
418};
419
420/*
421 * utilities
422 */
423
424static long snd_mixer_oss_conv(long val, long omin, long omax, long nmin, long nmax)
425{
426 long orange = omax - omin, nrange = nmax - nmin;
427
428 if (orange == 0)
429 return 0;
430 return DIV_ROUND_CLOSEST(nrange * (val - omin), orange) + nmin;
431}
432
433/* convert from alsa native to oss values (0-100) */
434static long snd_mixer_oss_conv1(long val, long min, long max, int *old)
435{
436 if (val == snd_mixer_oss_conv(*old, 0, 100, min, max))
437 return *old;
438 return snd_mixer_oss_conv(val, min, max, 0, 100);
439}
440
441/* convert from oss to alsa native values */
442static long snd_mixer_oss_conv2(long val, long min, long max)
443{
444 return snd_mixer_oss_conv(val, 0, 100, min, max);
445}
446
447#if 0
448static void snd_mixer_oss_recsrce_set(struct snd_card *card, int slot)
449{
450 struct snd_mixer_oss *mixer = card->mixer_oss;
451 if (mixer)
452 mixer->mask_recsrc |= 1 << slot;
453}
454
455static int snd_mixer_oss_recsrce_get(struct snd_card *card, int slot)
456{
457 struct snd_mixer_oss *mixer = card->mixer_oss;
458 if (mixer && (mixer->mask_recsrc & (1 << slot)))
459 return 1;
460 return 0;
461}
462#endif
463
464#define SNDRV_MIXER_OSS_SIGNATURE 0x65999250
465
466#define SNDRV_MIXER_OSS_ITEM_GLOBAL 0
467#define SNDRV_MIXER_OSS_ITEM_GSWITCH 1
468#define SNDRV_MIXER_OSS_ITEM_GROUTE 2
469#define SNDRV_MIXER_OSS_ITEM_GVOLUME 3
470#define SNDRV_MIXER_OSS_ITEM_PSWITCH 4
471#define SNDRV_MIXER_OSS_ITEM_PROUTE 5
472#define SNDRV_MIXER_OSS_ITEM_PVOLUME 6
473#define SNDRV_MIXER_OSS_ITEM_CSWITCH 7
474#define SNDRV_MIXER_OSS_ITEM_CROUTE 8
475#define SNDRV_MIXER_OSS_ITEM_CVOLUME 9
476#define SNDRV_MIXER_OSS_ITEM_CAPTURE 10
477
478#define SNDRV_MIXER_OSS_ITEM_COUNT 11
479
480#define SNDRV_MIXER_OSS_PRESENT_GLOBAL (1<<0)
481#define SNDRV_MIXER_OSS_PRESENT_GSWITCH (1<<1)
482#define SNDRV_MIXER_OSS_PRESENT_GROUTE (1<<2)
483#define SNDRV_MIXER_OSS_PRESENT_GVOLUME (1<<3)
484#define SNDRV_MIXER_OSS_PRESENT_PSWITCH (1<<4)
485#define SNDRV_MIXER_OSS_PRESENT_PROUTE (1<<5)
486#define SNDRV_MIXER_OSS_PRESENT_PVOLUME (1<<6)
487#define SNDRV_MIXER_OSS_PRESENT_CSWITCH (1<<7)
488#define SNDRV_MIXER_OSS_PRESENT_CROUTE (1<<8)
489#define SNDRV_MIXER_OSS_PRESENT_CVOLUME (1<<9)
490#define SNDRV_MIXER_OSS_PRESENT_CAPTURE (1<<10)
491
492struct slot {
493 unsigned int signature;
494 unsigned int present;
495 unsigned int channels;
496 unsigned int numid[SNDRV_MIXER_OSS_ITEM_COUNT];
497 unsigned int capture_item;
498 const struct snd_mixer_oss_assign_table *assigned;
499 unsigned int allocated: 1;
500};
501
502#define ID_UNKNOWN ((unsigned int)-1)
503
504static struct snd_kcontrol *snd_mixer_oss_test_id(struct snd_mixer_oss *mixer, const char *name, int index)
505{
506 struct snd_card *card = mixer->card;
507 struct snd_ctl_elem_id id;
508
509 memset(&id, 0, sizeof(id));
510 id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
511 strscpy(id.name, name, sizeof(id.name));
512 id.index = index;
513 return snd_ctl_find_id_locked(card, &id);
514}
515
516static void snd_mixer_oss_get_volume1_vol(struct snd_mixer_oss_file *fmixer,
517 struct snd_mixer_oss_slot *pslot,
518 unsigned int numid,
519 int *left, int *right)
520{
521 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL;
522 struct snd_ctl_elem_value *uctl __free(kfree) = NULL;
523 struct snd_kcontrol *kctl;
524 struct snd_card *card = fmixer->card;
525
526 if (numid == ID_UNKNOWN)
527 return;
528 guard(rwsem_read)(&card->controls_rwsem);
529 kctl = snd_ctl_find_numid_locked(card, numid);
530 if (!kctl)
531 return;
532 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
533 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
534 if (uinfo == NULL || uctl == NULL)
535 return;
536 if (kctl->info(kctl, uinfo))
537 return;
538 if (kctl->get(kctl, uctl))
539 return;
540 if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
541 uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
542 return;
543 *left = snd_mixer_oss_conv1(uctl->value.integer.value[0], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[0]);
544 if (uinfo->count > 1)
545 *right = snd_mixer_oss_conv1(uctl->value.integer.value[1], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[1]);
546}
547
548static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer,
549 struct snd_mixer_oss_slot *pslot,
550 unsigned int numid,
551 int *left, int *right,
552 int route)
553{
554 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL;
555 struct snd_ctl_elem_value *uctl __free(kfree) = NULL;
556 struct snd_kcontrol *kctl;
557 struct snd_card *card = fmixer->card;
558
559 if (numid == ID_UNKNOWN)
560 return;
561 guard(rwsem_read)(&card->controls_rwsem);
562 kctl = snd_ctl_find_numid_locked(card, numid);
563 if (!kctl)
564 return;
565 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
566 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
567 if (uinfo == NULL || uctl == NULL)
568 return;
569 if (kctl->info(kctl, uinfo))
570 return;
571 if (kctl->get(kctl, uctl))
572 return;
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}
581
582static int snd_mixer_oss_get_volume1(struct snd_mixer_oss_file *fmixer,
583 struct snd_mixer_oss_slot *pslot,
584 int *left, int *right)
585{
586 struct slot *slot = pslot->private_data;
587
588 *left = *right = 100;
589 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
590 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
591 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
592 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
593 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
594 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
595 }
596 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
597 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
598 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
599 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
600 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
601 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
602 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
603 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
604 }
605 return 0;
606}
607
608static void snd_mixer_oss_put_volume1_vol(struct snd_mixer_oss_file *fmixer,
609 struct snd_mixer_oss_slot *pslot,
610 unsigned int numid,
611 int left, int right)
612{
613 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL;
614 struct snd_ctl_elem_value *uctl __free(kfree) = NULL;
615 struct snd_kcontrol *kctl;
616 struct snd_card *card = fmixer->card;
617 int res;
618
619 if (numid == ID_UNKNOWN)
620 return;
621 guard(rwsem_read)(&card->controls_rwsem);
622 kctl = snd_ctl_find_numid_locked(card, numid);
623 if (!kctl)
624 return;
625 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
626 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
627 if (uinfo == NULL || uctl == NULL)
628 return;
629 if (kctl->info(kctl, uinfo))
630 return;
631 if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
632 uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
633 return;
634 uctl->value.integer.value[0] = snd_mixer_oss_conv2(left, uinfo->value.integer.min, uinfo->value.integer.max);
635 if (uinfo->count > 1)
636 uctl->value.integer.value[1] = snd_mixer_oss_conv2(right, uinfo->value.integer.min, uinfo->value.integer.max);
637 res = kctl->put(kctl, uctl);
638 if (res < 0)
639 return;
640 if (res > 0)
641 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
642}
643
644static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer,
645 struct snd_mixer_oss_slot *pslot,
646 unsigned int numid,
647 int left, int right,
648 int route)
649{
650 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL;
651 struct snd_ctl_elem_value *uctl __free(kfree) = NULL;
652 struct snd_kcontrol *kctl;
653 struct snd_card *card = fmixer->card;
654 int res;
655
656 if (numid == ID_UNKNOWN)
657 return;
658 guard(rwsem_read)(&card->controls_rwsem);
659 kctl = snd_ctl_find_numid_locked(card, numid);
660 if (!kctl)
661 return;
662 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
663 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
664 if (uinfo == NULL || uctl == NULL)
665 return;
666 if (kctl->info(kctl, uinfo))
667 return;
668 if (uinfo->count > 1) {
669 uctl->value.integer.value[0] = left > 0 ? 1 : 0;
670 uctl->value.integer.value[route ? 3 : 1] = right > 0 ? 1 : 0;
671 if (route) {
672 uctl->value.integer.value[1] =
673 uctl->value.integer.value[2] = 0;
674 }
675 } else {
676 uctl->value.integer.value[0] = (left > 0 || right > 0) ? 1 : 0;
677 }
678 res = kctl->put(kctl, uctl);
679 if (res < 0)
680 return;
681 if (res > 0)
682 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
683}
684
685static int snd_mixer_oss_put_volume1(struct snd_mixer_oss_file *fmixer,
686 struct snd_mixer_oss_slot *pslot,
687 int left, int right)
688{
689 struct slot *slot = pslot->private_data;
690
691 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
692 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
693 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME)
694 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
695 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) {
696 snd_mixer_oss_put_volume1_vol(fmixer, pslot,
697 slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
698 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
699 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
700 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
701 snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
702 }
703 if (left || right) {
704 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH)
705 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
706 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH)
707 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
708 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH)
709 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
710 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE)
711 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
712 if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE)
713 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
714 if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE)
715 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
716 } else {
717 if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
718 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
719 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
720 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
721 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
722 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
723 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
724 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
725 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
726 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
727 } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
728 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
729 }
730 }
731 return 0;
732}
733
734static int snd_mixer_oss_get_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
735 struct snd_mixer_oss_slot *pslot,
736 int *active)
737{
738 struct slot *slot = pslot->private_data;
739 int left, right;
740
741 left = right = 1;
742 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], &left, &right, 0);
743 *active = (left || right) ? 1 : 0;
744 return 0;
745}
746
747static int snd_mixer_oss_get_recsrc1_route(struct snd_mixer_oss_file *fmixer,
748 struct snd_mixer_oss_slot *pslot,
749 int *active)
750{
751 struct slot *slot = pslot->private_data;
752 int left, right;
753
754 left = right = 1;
755 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], &left, &right, 1);
756 *active = (left || right) ? 1 : 0;
757 return 0;
758}
759
760static int snd_mixer_oss_put_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
761 struct snd_mixer_oss_slot *pslot,
762 int active)
763{
764 struct slot *slot = pslot->private_data;
765
766 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], active, active, 0);
767 return 0;
768}
769
770static int snd_mixer_oss_put_recsrc1_route(struct snd_mixer_oss_file *fmixer,
771 struct snd_mixer_oss_slot *pslot,
772 int active)
773{
774 struct slot *slot = pslot->private_data;
775
776 snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], active, active, 1);
777 return 0;
778}
779
780static int snd_mixer_oss_get_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int *active_index)
781{
782 struct snd_card *card = fmixer->card;
783 struct snd_mixer_oss *mixer = fmixer->mixer;
784 struct snd_kcontrol *kctl;
785 struct snd_mixer_oss_slot *pslot;
786 struct slot *slot;
787 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL;
788 struct snd_ctl_elem_value *uctl __free(kfree) = NULL;
789 int err, idx;
790
791 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
792 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
793 if (uinfo == NULL || uctl == NULL)
794 return -ENOMEM;
795 guard(rwsem_read)(&card->controls_rwsem);
796 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
797 if (!kctl)
798 return -ENOENT;
799 err = kctl->info(kctl, uinfo);
800 if (err < 0)
801 return err;
802 err = kctl->get(kctl, uctl);
803 if (err < 0)
804 return err;
805 for (idx = 0; idx < 32; idx++) {
806 if (!(mixer->mask_recsrc & (1 << idx)))
807 continue;
808 pslot = &mixer->slots[idx];
809 slot = pslot->private_data;
810 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
811 continue;
812 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
813 continue;
814 if (slot->capture_item == uctl->value.enumerated.item[0]) {
815 *active_index = idx;
816 break;
817 }
818 }
819 return 0;
820}
821
822static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int active_index)
823{
824 struct snd_card *card = fmixer->card;
825 struct snd_mixer_oss *mixer = fmixer->mixer;
826 struct snd_kcontrol *kctl;
827 struct snd_mixer_oss_slot *pslot;
828 struct slot *slot = NULL;
829 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL;
830 struct snd_ctl_elem_value *uctl __free(kfree) = NULL;
831 int err;
832 unsigned int idx;
833
834 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
835 uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
836 if (uinfo == NULL || uctl == NULL)
837 return -ENOMEM;
838 guard(rwsem_read)(&card->controls_rwsem);
839 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
840 if (!kctl)
841 return -ENOENT;
842 err = kctl->info(kctl, uinfo);
843 if (err < 0)
844 return err;
845 for (idx = 0; idx < 32; idx++) {
846 if (!(mixer->mask_recsrc & (1 << idx)))
847 continue;
848 pslot = &mixer->slots[idx];
849 slot = pslot->private_data;
850 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
851 continue;
852 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
853 continue;
854 if (idx == active_index)
855 break;
856 slot = NULL;
857 }
858 if (!slot)
859 return 0;
860 for (idx = 0; idx < uinfo->count; idx++)
861 uctl->value.enumerated.item[idx] = slot->capture_item;
862 err = kctl->put(kctl, uctl);
863 if (err > 0)
864 snd_ctl_notify(fmixer->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
865 return 0;
866}
867
868struct snd_mixer_oss_assign_table {
869 int oss_id;
870 const char *name;
871 int index;
872};
873
874static int snd_mixer_oss_build_test(struct snd_mixer_oss *mixer, struct slot *slot, const char *name, int index, int item)
875{
876 struct snd_ctl_elem_info *info __free(kfree) = NULL;
877 struct snd_kcontrol *kcontrol;
878 struct snd_card *card = mixer->card;
879 int err;
880
881 scoped_guard(rwsem_read, &card->controls_rwsem) {
882 kcontrol = snd_mixer_oss_test_id(mixer, name, index);
883 if (kcontrol == NULL)
884 return 0;
885 info = kmalloc(sizeof(*info), GFP_KERNEL);
886 if (!info)
887 return -ENOMEM;
888 err = kcontrol->info(kcontrol, info);
889 if (err < 0)
890 return err;
891 slot->numid[item] = kcontrol->id.numid;
892 }
893 if (info->count > slot->channels)
894 slot->channels = info->count;
895 slot->present |= 1 << item;
896 return 0;
897}
898
899static void snd_mixer_oss_slot_free(struct snd_mixer_oss_slot *chn)
900{
901 struct slot *p = chn->private_data;
902 if (p) {
903 if (p->allocated && p->assigned) {
904 kfree_const(p->assigned->name);
905 kfree_const(p->assigned);
906 }
907 kfree(p);
908 }
909}
910
911static void mixer_slot_clear(struct snd_mixer_oss_slot *rslot)
912{
913 int idx = rslot->number; /* remember this */
914 if (rslot->private_free)
915 rslot->private_free(rslot);
916 memset(rslot, 0, sizeof(*rslot));
917 rslot->number = idx;
918}
919
920/* In a separate function to keep gcc 3.2 happy - do NOT merge this in
921 snd_mixer_oss_build_input! */
922static int snd_mixer_oss_build_test_all(struct snd_mixer_oss *mixer,
923 const struct snd_mixer_oss_assign_table *ptr,
924 struct slot *slot)
925{
926 char str[64];
927 int err;
928
929 err = snd_mixer_oss_build_test(mixer, slot, ptr->name, ptr->index,
930 SNDRV_MIXER_OSS_ITEM_GLOBAL);
931 if (err)
932 return err;
933 sprintf(str, "%s Switch", ptr->name);
934 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
935 SNDRV_MIXER_OSS_ITEM_GSWITCH);
936 if (err)
937 return err;
938 sprintf(str, "%s Route", ptr->name);
939 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
940 SNDRV_MIXER_OSS_ITEM_GROUTE);
941 if (err)
942 return err;
943 sprintf(str, "%s Volume", ptr->name);
944 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
945 SNDRV_MIXER_OSS_ITEM_GVOLUME);
946 if (err)
947 return err;
948 sprintf(str, "%s Playback Switch", ptr->name);
949 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
950 SNDRV_MIXER_OSS_ITEM_PSWITCH);
951 if (err)
952 return err;
953 sprintf(str, "%s Playback Route", ptr->name);
954 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
955 SNDRV_MIXER_OSS_ITEM_PROUTE);
956 if (err)
957 return err;
958 sprintf(str, "%s Playback Volume", ptr->name);
959 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
960 SNDRV_MIXER_OSS_ITEM_PVOLUME);
961 if (err)
962 return err;
963 sprintf(str, "%s Capture Switch", ptr->name);
964 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
965 SNDRV_MIXER_OSS_ITEM_CSWITCH);
966 if (err)
967 return err;
968 sprintf(str, "%s Capture Route", ptr->name);
969 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
970 SNDRV_MIXER_OSS_ITEM_CROUTE);
971 if (err)
972 return err;
973 sprintf(str, "%s Capture Volume", ptr->name);
974 err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
975 SNDRV_MIXER_OSS_ITEM_CVOLUME);
976 if (err)
977 return err;
978
979 return 0;
980}
981
982/*
983 * build an OSS mixer element.
984 * ptr_allocated means the entry is dynamically allocated (change via proc file).
985 * when replace_old = 1, the old entry is replaced with the new one.
986 */
987static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer,
988 const struct snd_mixer_oss_assign_table *ptr,
989 int ptr_allocated, int replace_old)
990{
991 struct slot slot;
992 struct slot *pslot;
993 struct snd_kcontrol *kctl;
994 struct snd_mixer_oss_slot *rslot;
995 char str[64];
996
997 /* check if already assigned */
998 if (mixer->slots[ptr->oss_id].get_volume && ! replace_old)
999 return 0;
1000
1001 memset(&slot, 0, sizeof(slot));
1002 memset(slot.numid, 0xff, sizeof(slot.numid)); /* ID_UNKNOWN */
1003 if (snd_mixer_oss_build_test_all(mixer, ptr, &slot))
1004 return 0;
1005 guard(rwsem_read)(&mixer->card->controls_rwsem);
1006 kctl = NULL;
1007 if (!ptr->index)
1008 kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
1009 if (kctl) {
1010 struct snd_ctl_elem_info *uinfo __free(kfree) = NULL;
1011
1012 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
1013 if (!uinfo)
1014 return -ENOMEM;
1015
1016 if (kctl->info(kctl, uinfo))
1017 return 0;
1018 strcpy(str, ptr->name);
1019 if (!strcmp(str, "Master"))
1020 strcpy(str, "Mix");
1021 if (!strcmp(str, "Master Mono"))
1022 strcpy(str, "Mix Mono");
1023 slot.capture_item = 0;
1024 if (!strcmp(uinfo->value.enumerated.name, str)) {
1025 slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1026 } else {
1027 for (slot.capture_item = 1; slot.capture_item < uinfo->value.enumerated.items; slot.capture_item++) {
1028 uinfo->value.enumerated.item = slot.capture_item;
1029 if (kctl->info(kctl, uinfo))
1030 return 0;
1031 if (!strcmp(uinfo->value.enumerated.name, str)) {
1032 slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1033 break;
1034 }
1035 }
1036 }
1037 }
1038 if (slot.present != 0) {
1039 pslot = kmalloc(sizeof(slot), GFP_KERNEL);
1040 if (! pslot)
1041 return -ENOMEM;
1042 *pslot = slot;
1043 pslot->signature = SNDRV_MIXER_OSS_SIGNATURE;
1044 pslot->assigned = ptr;
1045 pslot->allocated = ptr_allocated;
1046 rslot = &mixer->slots[ptr->oss_id];
1047 mixer_slot_clear(rslot);
1048 rslot->stereo = slot.channels > 1 ? 1 : 0;
1049 rslot->get_volume = snd_mixer_oss_get_volume1;
1050 rslot->put_volume = snd_mixer_oss_put_volume1;
1051 /* note: ES18xx have both Capture Source and XX Capture Volume !!! */
1052 if (slot.present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
1053 rslot->get_recsrc = snd_mixer_oss_get_recsrc1_sw;
1054 rslot->put_recsrc = snd_mixer_oss_put_recsrc1_sw;
1055 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
1056 rslot->get_recsrc = snd_mixer_oss_get_recsrc1_route;
1057 rslot->put_recsrc = snd_mixer_oss_put_recsrc1_route;
1058 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CAPTURE) {
1059 mixer->mask_recsrc |= 1 << ptr->oss_id;
1060 }
1061 rslot->private_data = pslot;
1062 rslot->private_free = snd_mixer_oss_slot_free;
1063 return 1;
1064 }
1065 return 0;
1066}
1067
1068#ifdef CONFIG_SND_PROC_FS
1069/*
1070 */
1071#define MIXER_VOL(name) [SOUND_MIXER_##name] = #name
1072static const char * const oss_mixer_names[SNDRV_OSS_MAX_MIXERS] = {
1073 MIXER_VOL(VOLUME),
1074 MIXER_VOL(BASS),
1075 MIXER_VOL(TREBLE),
1076 MIXER_VOL(SYNTH),
1077 MIXER_VOL(PCM),
1078 MIXER_VOL(SPEAKER),
1079 MIXER_VOL(LINE),
1080 MIXER_VOL(MIC),
1081 MIXER_VOL(CD),
1082 MIXER_VOL(IMIX),
1083 MIXER_VOL(ALTPCM),
1084 MIXER_VOL(RECLEV),
1085 MIXER_VOL(IGAIN),
1086 MIXER_VOL(OGAIN),
1087 MIXER_VOL(LINE1),
1088 MIXER_VOL(LINE2),
1089 MIXER_VOL(LINE3),
1090 MIXER_VOL(DIGITAL1),
1091 MIXER_VOL(DIGITAL2),
1092 MIXER_VOL(DIGITAL3),
1093 MIXER_VOL(PHONEIN),
1094 MIXER_VOL(PHONEOUT),
1095 MIXER_VOL(VIDEO),
1096 MIXER_VOL(RADIO),
1097 MIXER_VOL(MONITOR),
1098};
1099
1100/*
1101 * /proc interface
1102 */
1103
1104static void snd_mixer_oss_proc_read(struct snd_info_entry *entry,
1105 struct snd_info_buffer *buffer)
1106{
1107 struct snd_mixer_oss *mixer = entry->private_data;
1108 int i;
1109
1110 guard(mutex)(&mixer->reg_mutex);
1111 for (i = 0; i < SNDRV_OSS_MAX_MIXERS; i++) {
1112 struct slot *p;
1113
1114 if (! oss_mixer_names[i])
1115 continue;
1116 p = (struct slot *)mixer->slots[i].private_data;
1117 snd_iprintf(buffer, "%s ", oss_mixer_names[i]);
1118 if (p && p->assigned)
1119 snd_iprintf(buffer, "\"%s\" %d\n",
1120 p->assigned->name,
1121 p->assigned->index);
1122 else
1123 snd_iprintf(buffer, "\"\" 0\n");
1124 }
1125}
1126
1127static void snd_mixer_oss_proc_write(struct snd_info_entry *entry,
1128 struct snd_info_buffer *buffer)
1129{
1130 struct snd_mixer_oss *mixer = entry->private_data;
1131 char line[128], str[32], idxstr[16];
1132 const char *cptr;
1133 unsigned int idx;
1134 int ch;
1135 struct snd_mixer_oss_assign_table *tbl;
1136 struct slot *slot;
1137
1138 while (!snd_info_get_line(buffer, line, sizeof(line))) {
1139 cptr = snd_info_get_str(str, line, sizeof(str));
1140 for (ch = 0; ch < SNDRV_OSS_MAX_MIXERS; ch++)
1141 if (oss_mixer_names[ch] && strcmp(oss_mixer_names[ch], str) == 0)
1142 break;
1143 if (ch >= SNDRV_OSS_MAX_MIXERS) {
1144 pr_err("ALSA: mixer_oss: invalid OSS volume '%s'\n",
1145 str);
1146 continue;
1147 }
1148 cptr = snd_info_get_str(str, cptr, sizeof(str));
1149 if (! *str) {
1150 /* remove the entry */
1151 scoped_guard(mutex, &mixer->reg_mutex)
1152 mixer_slot_clear(&mixer->slots[ch]);
1153 continue;
1154 }
1155 snd_info_get_str(idxstr, cptr, sizeof(idxstr));
1156 idx = simple_strtoul(idxstr, NULL, 10);
1157 if (idx >= 0x4000) { /* too big */
1158 pr_err("ALSA: mixer_oss: invalid index %d\n", idx);
1159 continue;
1160 }
1161 scoped_guard(mutex, &mixer->reg_mutex) {
1162 slot = (struct slot *)mixer->slots[ch].private_data;
1163 if (slot && slot->assigned &&
1164 slot->assigned->index == idx && !strcmp(slot->assigned->name, str))
1165 /* not changed */
1166 break;
1167 tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
1168 if (!tbl)
1169 break;
1170 tbl->oss_id = ch;
1171 tbl->name = kstrdup(str, GFP_KERNEL);
1172 if (!tbl->name) {
1173 kfree(tbl);
1174 break;
1175 }
1176 tbl->index = idx;
1177 if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) {
1178 kfree(tbl->name);
1179 kfree(tbl);
1180 }
1181 }
1182 }
1183}
1184
1185static void snd_mixer_oss_proc_init(struct snd_mixer_oss *mixer)
1186{
1187 struct snd_info_entry *entry;
1188
1189 entry = snd_info_create_card_entry(mixer->card, "oss_mixer",
1190 mixer->card->proc_root);
1191 if (! entry)
1192 return;
1193 entry->content = SNDRV_INFO_CONTENT_TEXT;
1194 entry->mode = S_IFREG | 0644;
1195 entry->c.text.read = snd_mixer_oss_proc_read;
1196 entry->c.text.write = snd_mixer_oss_proc_write;
1197 entry->private_data = mixer;
1198 if (snd_info_register(entry) < 0) {
1199 snd_info_free_entry(entry);
1200 entry = NULL;
1201 }
1202 mixer->proc_entry = entry;
1203}
1204
1205static void snd_mixer_oss_proc_done(struct snd_mixer_oss *mixer)
1206{
1207 snd_info_free_entry(mixer->proc_entry);
1208 mixer->proc_entry = NULL;
1209}
1210#else /* !CONFIG_SND_PROC_FS */
1211#define snd_mixer_oss_proc_init(mix)
1212#define snd_mixer_oss_proc_done(mix)
1213#endif /* CONFIG_SND_PROC_FS */
1214
1215static void snd_mixer_oss_build(struct snd_mixer_oss *mixer)
1216{
1217 static const struct snd_mixer_oss_assign_table table[] = {
1218 { SOUND_MIXER_VOLUME, "Master", 0 },
1219 { SOUND_MIXER_VOLUME, "Front", 0 }, /* fallback */
1220 { SOUND_MIXER_BASS, "Tone Control - Bass", 0 },
1221 { SOUND_MIXER_TREBLE, "Tone Control - Treble", 0 },
1222 { SOUND_MIXER_SYNTH, "Synth", 0 },
1223 { SOUND_MIXER_SYNTH, "FM", 0 }, /* fallback */
1224 { SOUND_MIXER_SYNTH, "Music", 0 }, /* fallback */
1225 { SOUND_MIXER_PCM, "PCM", 0 },
1226 { SOUND_MIXER_SPEAKER, "Beep", 0 },
1227 { SOUND_MIXER_SPEAKER, "PC Speaker", 0 }, /* fallback */
1228 { SOUND_MIXER_SPEAKER, "Speaker", 0 }, /* fallback */
1229 { SOUND_MIXER_LINE, "Line", 0 },
1230 { SOUND_MIXER_MIC, "Mic", 0 },
1231 { SOUND_MIXER_CD, "CD", 0 },
1232 { SOUND_MIXER_IMIX, "Monitor Mix", 0 },
1233 { SOUND_MIXER_ALTPCM, "PCM", 1 },
1234 { SOUND_MIXER_ALTPCM, "Headphone", 0 }, /* fallback */
1235 { SOUND_MIXER_ALTPCM, "Wave", 0 }, /* fallback */
1236 { SOUND_MIXER_RECLEV, "-- nothing --", 0 },
1237 { SOUND_MIXER_IGAIN, "Capture", 0 },
1238 { SOUND_MIXER_OGAIN, "Playback", 0 },
1239 { SOUND_MIXER_LINE1, "Aux", 0 },
1240 { SOUND_MIXER_LINE2, "Aux", 1 },
1241 { SOUND_MIXER_LINE3, "Aux", 2 },
1242 { SOUND_MIXER_DIGITAL1, "Digital", 0 },
1243 { SOUND_MIXER_DIGITAL1, "IEC958", 0 }, /* fallback */
1244 { SOUND_MIXER_DIGITAL1, "IEC958 Optical", 0 }, /* fallback */
1245 { SOUND_MIXER_DIGITAL1, "IEC958 Coaxial", 0 }, /* fallback */
1246 { SOUND_MIXER_DIGITAL2, "Digital", 1 },
1247 { SOUND_MIXER_DIGITAL3, "Digital", 2 },
1248 { SOUND_MIXER_PHONEIN, "Phone", 0 },
1249 { SOUND_MIXER_PHONEOUT, "Master Mono", 0 },
1250 { SOUND_MIXER_PHONEOUT, "Speaker", 0 }, /*fallback*/
1251 { SOUND_MIXER_PHONEOUT, "Mono", 0 }, /*fallback*/
1252 { SOUND_MIXER_PHONEOUT, "Phone", 0 }, /* fallback */
1253 { SOUND_MIXER_VIDEO, "Video", 0 },
1254 { SOUND_MIXER_RADIO, "Radio", 0 },
1255 { SOUND_MIXER_MONITOR, "Monitor", 0 }
1256 };
1257 unsigned int idx;
1258
1259 for (idx = 0; idx < ARRAY_SIZE(table); idx++)
1260 snd_mixer_oss_build_input(mixer, &table[idx], 0, 0);
1261 if (mixer->mask_recsrc) {
1262 mixer->get_recsrc = snd_mixer_oss_get_recsrc2;
1263 mixer->put_recsrc = snd_mixer_oss_put_recsrc2;
1264 }
1265}
1266
1267/*
1268 *
1269 */
1270
1271static int snd_mixer_oss_free1(void *private)
1272{
1273 struct snd_mixer_oss *mixer = private;
1274 struct snd_card *card;
1275 int idx;
1276
1277 if (!mixer)
1278 return 0;
1279 card = mixer->card;
1280 if (snd_BUG_ON(mixer != card->mixer_oss))
1281 return -ENXIO;
1282 card->mixer_oss = NULL;
1283 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) {
1284 struct snd_mixer_oss_slot *chn = &mixer->slots[idx];
1285 if (chn->private_free)
1286 chn->private_free(chn);
1287 }
1288 kfree(mixer);
1289 return 0;
1290}
1291
1292static int snd_mixer_oss_notify_handler(struct snd_card *card, int cmd)
1293{
1294 struct snd_mixer_oss *mixer;
1295
1296 if (cmd == SND_MIXER_OSS_NOTIFY_REGISTER) {
1297 int idx, err;
1298
1299 mixer = kcalloc(2, sizeof(*mixer), GFP_KERNEL);
1300 if (mixer == NULL)
1301 return -ENOMEM;
1302 mutex_init(&mixer->reg_mutex);
1303 err = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER,
1304 card, 0,
1305 &snd_mixer_oss_f_ops, card);
1306 if (err < 0) {
1307 dev_err(card->dev,
1308 "unable to register OSS mixer device %i:%i\n",
1309 card->number, 0);
1310 kfree(mixer);
1311 return err;
1312 }
1313 mixer->oss_dev_alloc = 1;
1314 mixer->card = card;
1315 if (*card->mixername)
1316 strscpy(mixer->name, card->mixername, sizeof(mixer->name));
1317 else
1318 snprintf(mixer->name, sizeof(mixer->name),
1319 "mixer%i", card->number);
1320#ifdef SNDRV_OSS_INFO_DEV_MIXERS
1321 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIXERS,
1322 card->number,
1323 mixer->name);
1324#endif
1325 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++)
1326 mixer->slots[idx].number = idx;
1327 card->mixer_oss = mixer;
1328 snd_mixer_oss_build(mixer);
1329 snd_mixer_oss_proc_init(mixer);
1330 } else {
1331 mixer = card->mixer_oss;
1332 if (mixer == NULL)
1333 return 0;
1334 if (mixer->oss_dev_alloc) {
1335#ifdef SNDRV_OSS_INFO_DEV_MIXERS
1336 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIXERS, mixer->card->number);
1337#endif
1338 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, mixer->card, 0);
1339 mixer->oss_dev_alloc = 0;
1340 }
1341 if (cmd == SND_MIXER_OSS_NOTIFY_DISCONNECT)
1342 return 0;
1343 snd_mixer_oss_proc_done(mixer);
1344 return snd_mixer_oss_free1(mixer);
1345 }
1346 return 0;
1347}
1348
1349static int __init alsa_mixer_oss_init(void)
1350{
1351 struct snd_card *card;
1352 int idx;
1353
1354 snd_mixer_oss_notify_callback = snd_mixer_oss_notify_handler;
1355 for (idx = 0; idx < SNDRV_CARDS; idx++) {
1356 card = snd_card_ref(idx);
1357 if (card) {
1358 snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_REGISTER);
1359 snd_card_unref(card);
1360 }
1361 }
1362 return 0;
1363}
1364
1365static void __exit alsa_mixer_oss_exit(void)
1366{
1367 struct snd_card *card;
1368 int idx;
1369
1370 snd_mixer_oss_notify_callback = NULL;
1371 for (idx = 0; idx < SNDRV_CARDS; idx++) {
1372 card = snd_card_ref(idx);
1373 if (card) {
1374 snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_FREE);
1375 snd_card_unref(card);
1376 }
1377 }
1378}
1379
1380module_init(alsa_mixer_oss_init)
1381module_exit(alsa_mixer_oss_exit)