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
22 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
23 MODULE_DESCRIPTION("Mixer OSS emulation for ALSA.");
24 MODULE_LICENSE("GPL");
25 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MIXER);
26
snd_mixer_oss_open(struct inode * inode,struct file * file)27 static 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
snd_mixer_oss_release(struct inode * inode,struct file * file)69 static 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
snd_mixer_oss_info(struct snd_mixer_oss_file * fmixer,mixer_info __user * _info)82 static 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
snd_mixer_oss_info_obsolete(struct snd_mixer_oss_file * fmixer,_old_mixer_info __user * _info)98 static 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
snd_mixer_oss_caps(struct snd_mixer_oss_file * fmixer)113 static 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
snd_mixer_oss_devmask(struct snd_mixer_oss_file * fmixer)125 static 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
snd_mixer_oss_stereodevs(struct snd_mixer_oss_file * fmixer)143 static 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
snd_mixer_oss_recmask(struct snd_mixer_oss_file * fmixer)161 static 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
snd_mixer_oss_get_recsrc(struct snd_mixer_oss_file * fmixer)184 static 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
snd_mixer_oss_set_recsrc(struct snd_mixer_oss_file * fmixer,int recsrc)217 static 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
snd_mixer_oss_get_volume(struct snd_mixer_oss_file * fmixer,int slot)257 static 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
snd_mixer_oss_set_volume(struct snd_mixer_oss_file * fmixer,int slot,int volume)291 static 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
snd_mixer_oss_ioctl1(struct snd_mixer_oss_file * fmixer,unsigned int cmd,unsigned long arg)320 static 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
snd_mixer_oss_ioctl(struct file * file,unsigned int cmd,unsigned long arg)388 static 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
snd_mixer_oss_ioctl_card(struct snd_card * card,unsigned int cmd,unsigned long arg)393 int 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 }
406 EXPORT_SYMBOL(snd_mixer_oss_ioctl_card);
407
408 #ifdef CONFIG_COMPAT
409 /* all compatible */
snd_mixer_oss_ioctl_compat(struct file * file,unsigned int cmd,unsigned long arg)410 static 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
424 static 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
snd_mixer_oss_conv(long val,long omin,long omax,long nmin,long nmax)438 static 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) */
snd_mixer_oss_conv1(long val,long min,long max,int * old)448 static 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 */
snd_mixer_oss_conv2(long val,long min,long max)456 static 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
462 static 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
469 static 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
506 struct 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
snd_mixer_oss_test_id(struct snd_mixer_oss * mixer,const char * name,int index)518 static 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
snd_mixer_oss_get_volume1_vol(struct snd_mixer_oss_file * fmixer,struct snd_mixer_oss_slot * pslot,unsigned int numid,int * left,int * right)530 static 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
snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file * fmixer,struct snd_mixer_oss_slot * pslot,unsigned int numid,int * left,int * right,int route)568 static 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
snd_mixer_oss_get_volume1(struct snd_mixer_oss_file * fmixer,struct snd_mixer_oss_slot * pslot,int * left,int * right)608 static 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
snd_mixer_oss_put_volume1_vol(struct snd_mixer_oss_file * fmixer,struct snd_mixer_oss_slot * pslot,unsigned int numid,int left,int right)634 static 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
snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file * fmixer,struct snd_mixer_oss_slot * pslot,unsigned int numid,int left,int right,int route)676 static 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
snd_mixer_oss_put_volume1(struct snd_mixer_oss_file * fmixer,struct snd_mixer_oss_slot * pslot,int left,int right)723 static 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
snd_mixer_oss_get_recsrc1_sw(struct snd_mixer_oss_file * fmixer,struct snd_mixer_oss_slot * pslot,int * active)772 static 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
snd_mixer_oss_get_recsrc1_route(struct snd_mixer_oss_file * fmixer,struct snd_mixer_oss_slot * pslot,int * active)785 static 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
snd_mixer_oss_put_recsrc1_sw(struct snd_mixer_oss_file * fmixer,struct snd_mixer_oss_slot * pslot,int active)798 static 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
snd_mixer_oss_put_recsrc1_route(struct snd_mixer_oss_file * fmixer,struct snd_mixer_oss_slot * pslot,int active)808 static 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
snd_mixer_oss_get_recsrc2(struct snd_mixer_oss_file * fmixer,unsigned int * active_index)818 static 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
snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file * fmixer,unsigned int active_index)870 static 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
926 struct snd_mixer_oss_assign_table {
927 int oss_id;
928 const char *name;
929 int index;
930 };
931
snd_mixer_oss_build_test(struct snd_mixer_oss * mixer,struct slot * slot,const char * name,int index,int item)932 static 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
snd_mixer_oss_slot_free(struct snd_mixer_oss_slot * chn)965 static 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
mixer_slot_clear(struct snd_mixer_oss_slot * rslot)977 static 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! */
snd_mixer_oss_build_test_all(struct snd_mixer_oss * mixer,const struct snd_mixer_oss_assign_table * ptr,struct slot * slot)988 static 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 */
snd_mixer_oss_build_input(struct snd_mixer_oss * mixer,const struct snd_mixer_oss_assign_table * ptr,int ptr_allocated,int replace_old)1053 static 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
1148 static 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
snd_mixer_oss_proc_read(struct snd_info_entry * entry,struct snd_info_buffer * buffer)1180 static 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
snd_mixer_oss_proc_write(struct snd_info_entry * entry,struct snd_info_buffer * buffer)1204 static 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
snd_mixer_oss_proc_init(struct snd_mixer_oss * mixer)1264 static 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
snd_mixer_oss_proc_done(struct snd_mixer_oss * mixer)1284 static 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
snd_mixer_oss_build(struct snd_mixer_oss * mixer)1294 static 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
snd_mixer_oss_free1(void * private)1350 static 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
snd_mixer_oss_notify_handler(struct snd_card * card,int cmd)1371 static 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
alsa_mixer_oss_init(void)1428 static 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
alsa_mixer_oss_exit(void)1444 static 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
1459 module_init(alsa_mixer_oss_init)
1460 module_exit(alsa_mixer_oss_exit)
1461