ALSA: Add const prefix to proc helper functions
[linux-2.6.git] / sound / core / oss / mixer_oss.c
1 /*
2  *  OSS emulation layer for the mixer interface
3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4  *
5  *
6  *   This program is free software; you can redistribute it and/or modify
7  *   it under the terms of the GNU General Public License as published by
8  *   the Free Software Foundation; either version 2 of the License, or
9  *   (at your option) any later version.
10  *
11  *   This program is distributed in the hope that it will be useful,
12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *   GNU General Public License for more details.
15  *
16  *   You should have received a copy of the GNU General Public License
17  *   along with this program; if not, write to the Free Software
18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
19  *
20  */
21
22 #include <linux/init.h>
23 #include <linux/slab.h>
24 #include <linux/time.h>
25 #include <linux/string.h>
26 #include <sound/core.h>
27 #include <sound/minors.h>
28 #include <sound/control.h>
29 #include <sound/info.h>
30 #include <sound/mixer_oss.h>
31 #include <linux/soundcard.h>
32
33 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
34
35 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
36 MODULE_DESCRIPTION("Mixer OSS emulation for ALSA.");
37 MODULE_LICENSE("GPL");
38 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MIXER);
39
40 static int snd_mixer_oss_open(struct inode *inode, struct file *file)
41 {
42         struct snd_card *card;
43         struct snd_mixer_oss_file *fmixer;
44         int err;
45
46         card = snd_lookup_oss_minor_data(iminor(inode),
47                                          SNDRV_OSS_DEVICE_TYPE_MIXER);
48         if (card == NULL)
49                 return -ENODEV;
50         if (card->mixer_oss == NULL)
51                 return -ENODEV;
52         err = snd_card_file_add(card, file);
53         if (err < 0)
54                 return err;
55         fmixer = kzalloc(sizeof(*fmixer), GFP_KERNEL);
56         if (fmixer == NULL) {
57                 snd_card_file_remove(card, file);
58                 return -ENOMEM;
59         }
60         fmixer->card = card;
61         fmixer->mixer = card->mixer_oss;
62         file->private_data = fmixer;
63         if (!try_module_get(card->module)) {
64                 kfree(fmixer);
65                 snd_card_file_remove(card, file);
66                 return -EFAULT;
67         }
68         return 0;
69 }
70
71 static int snd_mixer_oss_release(struct inode *inode, struct file *file)
72 {
73         struct snd_mixer_oss_file *fmixer;
74
75         if (file->private_data) {
76                 fmixer = (struct snd_mixer_oss_file *) file->private_data;
77                 module_put(fmixer->card->module);
78                 snd_card_file_remove(fmixer->card, file);
79                 kfree(fmixer);
80         }
81         return 0;
82 }
83
84 static int snd_mixer_oss_info(struct snd_mixer_oss_file *fmixer,
85                               mixer_info __user *_info)
86 {
87         struct snd_card *card = fmixer->card;
88         struct snd_mixer_oss *mixer = fmixer->mixer;
89         struct mixer_info info;
90         
91         memset(&info, 0, sizeof(info));
92         strlcpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));
93         strlcpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));
94         info.modify_counter = card->mixer_oss_change_count;
95         if (copy_to_user(_info, &info, sizeof(info)))
96                 return -EFAULT;
97         return 0;
98 }
99
100 static int snd_mixer_oss_info_obsolete(struct snd_mixer_oss_file *fmixer,
101                                        _old_mixer_info __user *_info)
102 {
103         struct snd_card *card = fmixer->card;
104         struct snd_mixer_oss *mixer = fmixer->mixer;
105         _old_mixer_info info;
106         
107         memset(&info, 0, sizeof(info));
108         strlcpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));
109         strlcpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));
110         if (copy_to_user(_info, &info, sizeof(info)))
111                 return -EFAULT;
112         return 0;
113 }
114
115 static int snd_mixer_oss_caps(struct snd_mixer_oss_file *fmixer)
116 {
117         struct snd_mixer_oss *mixer = fmixer->mixer;
118         int result = 0;
119
120         if (mixer == NULL)
121                 return -EIO;
122         if (mixer->get_recsrc && mixer->put_recsrc)
123                 result |= SOUND_CAP_EXCL_INPUT;
124         return result;
125 }
126
127 static int snd_mixer_oss_devmask(struct snd_mixer_oss_file *fmixer)
128 {
129         struct snd_mixer_oss *mixer = fmixer->mixer;
130         struct snd_mixer_oss_slot *pslot;
131         int result = 0, chn;
132
133         if (mixer == NULL)
134                 return -EIO;
135         for (chn = 0; chn < 31; chn++) {
136                 pslot = &mixer->slots[chn];
137                 if (pslot->put_volume || pslot->put_recsrc)
138                         result |= 1 << chn;
139         }
140         return result;
141 }
142
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         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
159 static 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         if (mixer->put_recsrc && mixer->get_recsrc) {   /* exclusive */
167                 result = mixer->mask_recsrc;
168         } else {
169                 struct snd_mixer_oss_slot *pslot;
170                 int chn;
171                 for (chn = 0; chn < 31; chn++) {
172                         pslot = &mixer->slots[chn];
173                         if (pslot->put_recsrc)
174                                 result |= 1 << chn;
175                 }
176         }
177         return result;
178 }
179
180 static int snd_mixer_oss_get_recsrc(struct snd_mixer_oss_file *fmixer)
181 {
182         struct snd_mixer_oss *mixer = fmixer->mixer;
183         int result = 0;
184
185         if (mixer == NULL)
186                 return -EIO;
187         if (mixer->put_recsrc && mixer->get_recsrc) {   /* exclusive */
188                 int err;
189                 if ((err = mixer->get_recsrc(fmixer, &result)) < 0)
190                         return err;
191                 result = 1 << result;
192         } else {
193                 struct snd_mixer_oss_slot *pslot;
194                 int chn;
195                 for (chn = 0; chn < 31; chn++) {
196                         pslot = &mixer->slots[chn];
197                         if (pslot->get_recsrc) {
198                                 int active = 0;
199                                 pslot->get_recsrc(fmixer, pslot, &active);
200                                 if (active)
201                                         result |= 1 << chn;
202                         }
203                 }
204         }
205         return mixer->oss_recsrc = result;
206 }
207
208 static int snd_mixer_oss_set_recsrc(struct snd_mixer_oss_file *fmixer, int recsrc)
209 {
210         struct snd_mixer_oss *mixer = fmixer->mixer;
211         struct snd_mixer_oss_slot *pslot;
212         int chn, active;
213         int result = 0;
214
215         if (mixer == NULL)
216                 return -EIO;
217         if (mixer->get_recsrc && mixer->put_recsrc) {   /* exclusive input */
218                 if (recsrc & ~mixer->oss_recsrc)
219                         recsrc &= ~mixer->oss_recsrc;
220                 mixer->put_recsrc(fmixer, ffz(~recsrc));
221                 mixer->get_recsrc(fmixer, &result);
222                 result = 1 << result;
223         }
224         for (chn = 0; chn < 31; chn++) {
225                 pslot = &mixer->slots[chn];
226                 if (pslot->put_recsrc) {
227                         active = (recsrc & (1 << chn)) ? 1 : 0;
228                         pslot->put_recsrc(fmixer, pslot, active);
229                 }
230         }
231         if (! result) {
232                 for (chn = 0; chn < 31; chn++) {
233                         pslot = &mixer->slots[chn];
234                         if (pslot->get_recsrc) {
235                                 active = 0;
236                                 pslot->get_recsrc(fmixer, pslot, &active);
237                                 if (active)
238                                         result |= 1 << chn;
239                         }
240                 }
241         }
242         return result;
243 }
244
245 static int snd_mixer_oss_get_volume(struct snd_mixer_oss_file *fmixer, int slot)
246 {
247         struct snd_mixer_oss *mixer = fmixer->mixer;
248         struct snd_mixer_oss_slot *pslot;
249         int result = 0, left, right;
250
251         if (mixer == NULL || slot > 30)
252                 return -EIO;
253         pslot = &mixer->slots[slot];
254         left = pslot->volume[0];
255         right = pslot->volume[1];
256         if (pslot->get_volume)
257                 result = pslot->get_volume(fmixer, pslot, &left, &right);
258         if (!pslot->stereo)
259                 right = left;
260         if (snd_BUG_ON(left < 0 || left > 100))
261                 return -EIO;
262         if (snd_BUG_ON(right < 0 || right > 100))
263                 return -EIO;
264         if (result >= 0) {
265                 pslot->volume[0] = left;
266                 pslot->volume[1] = right;
267                 result = (left & 0xff) | ((right & 0xff) << 8);
268         }
269         return result;
270 }
271
272 static int snd_mixer_oss_set_volume(struct snd_mixer_oss_file *fmixer,
273                                     int slot, int volume)
274 {
275         struct snd_mixer_oss *mixer = fmixer->mixer;
276         struct snd_mixer_oss_slot *pslot;
277         int result = 0, left = volume & 0xff, right = (volume >> 8) & 0xff;
278
279         if (mixer == NULL || slot > 30)
280                 return -EIO;
281         pslot = &mixer->slots[slot];
282         if (left > 100)
283                 left = 100;
284         if (right > 100)
285                 right = 100;
286         if (!pslot->stereo)
287                 right = left;
288         if (pslot->put_volume)
289                 result = pslot->put_volume(fmixer, pslot, left, right);
290         if (result < 0)
291                 return result;
292         pslot->volume[0] = left;
293         pslot->volume[1] = right;
294         return (left & 0xff) | ((right & 0xff) << 8);
295 }
296
297 static int snd_mixer_oss_ioctl1(struct snd_mixer_oss_file *fmixer, unsigned int cmd, unsigned long arg)
298 {
299         void __user *argp = (void __user *)arg;
300         int __user *p = argp;
301         int tmp;
302
303         if (snd_BUG_ON(!fmixer))
304                 return -ENXIO;
305         if (((cmd >> 8) & 0xff) == 'M') {
306                 switch (cmd) {
307                 case SOUND_MIXER_INFO:
308                         return snd_mixer_oss_info(fmixer, argp);
309                 case SOUND_OLD_MIXER_INFO:
310                         return snd_mixer_oss_info_obsolete(fmixer, argp);
311                 case SOUND_MIXER_WRITE_RECSRC:
312                         if (get_user(tmp, p))
313                                 return -EFAULT;
314                         tmp = snd_mixer_oss_set_recsrc(fmixer, tmp);
315                         if (tmp < 0)
316                                 return tmp;
317                         return put_user(tmp, p);
318                 case OSS_GETVERSION:
319                         return put_user(SNDRV_OSS_VERSION, p);
320                 case OSS_ALSAEMULVER:
321                         return put_user(1, p);
322                 case SOUND_MIXER_READ_DEVMASK:
323                         tmp = snd_mixer_oss_devmask(fmixer);
324                         if (tmp < 0)
325                                 return tmp;
326                         return put_user(tmp, p);
327                 case SOUND_MIXER_READ_STEREODEVS:
328                         tmp = snd_mixer_oss_stereodevs(fmixer);
329                         if (tmp < 0)
330                                 return tmp;
331                         return put_user(tmp, p);
332                 case SOUND_MIXER_READ_RECMASK:
333                         tmp = snd_mixer_oss_recmask(fmixer);
334                         if (tmp < 0)
335                                 return tmp;
336                         return put_user(tmp, p);
337                 case SOUND_MIXER_READ_CAPS:
338                         tmp = snd_mixer_oss_caps(fmixer);
339                         if (tmp < 0)
340                                 return tmp;
341                         return put_user(tmp, p);
342                 case SOUND_MIXER_READ_RECSRC:
343                         tmp = snd_mixer_oss_get_recsrc(fmixer);
344                         if (tmp < 0)
345                                 return tmp;
346                         return put_user(tmp, p);
347                 }
348         }
349         if (cmd & SIOC_IN) {
350                 if (get_user(tmp, p))
351                         return -EFAULT;
352                 tmp = snd_mixer_oss_set_volume(fmixer, cmd & 0xff, tmp);
353                 if (tmp < 0)
354                         return tmp;
355                 return put_user(tmp, p);
356         } else if (cmd & SIOC_OUT) {
357                 tmp = snd_mixer_oss_get_volume(fmixer, cmd & 0xff);
358                 if (tmp < 0)
359                         return tmp;
360                 return put_user(tmp, p);
361         }
362         return -ENXIO;
363 }
364
365 static long snd_mixer_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
366 {
367         return snd_mixer_oss_ioctl1((struct snd_mixer_oss_file *) file->private_data, cmd, arg);
368 }
369
370 int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg)
371 {
372         struct snd_mixer_oss_file fmixer;
373         
374         if (snd_BUG_ON(!card))
375                 return -ENXIO;
376         if (card->mixer_oss == NULL)
377                 return -ENXIO;
378         memset(&fmixer, 0, sizeof(fmixer));
379         fmixer.card = card;
380         fmixer.mixer = card->mixer_oss;
381         return snd_mixer_oss_ioctl1(&fmixer, cmd, arg);
382 }
383
384 #ifdef CONFIG_COMPAT
385 /* all compatible */
386 #define snd_mixer_oss_ioctl_compat      snd_mixer_oss_ioctl
387 #else
388 #define snd_mixer_oss_ioctl_compat      NULL
389 #endif
390
391 /*
392  *  REGISTRATION PART
393  */
394
395 static const struct file_operations snd_mixer_oss_f_ops =
396 {
397         .owner =        THIS_MODULE,
398         .open =         snd_mixer_oss_open,
399         .release =      snd_mixer_oss_release,
400         .unlocked_ioctl =       snd_mixer_oss_ioctl,
401         .compat_ioctl = snd_mixer_oss_ioctl_compat,
402 };
403
404 /*
405  *  utilities
406  */
407
408 static long snd_mixer_oss_conv(long val, long omin, long omax, long nmin, long nmax)
409 {
410         long orange = omax - omin, nrange = nmax - nmin;
411         
412         if (orange == 0)
413                 return 0;
414         return ((nrange * (val - omin)) + (orange / 2)) / orange + nmin;
415 }
416
417 /* convert from alsa native to oss values (0-100) */
418 static long snd_mixer_oss_conv1(long val, long min, long max, int *old)
419 {
420         if (val == snd_mixer_oss_conv(*old, 0, 100, min, max))
421                 return *old;
422         return snd_mixer_oss_conv(val, min, max, 0, 100);
423 }
424
425 /* convert from oss to alsa native values */
426 static long snd_mixer_oss_conv2(long val, long min, long max)
427 {
428         return snd_mixer_oss_conv(val, 0, 100, min, max);
429 }
430
431 #if 0
432 static void snd_mixer_oss_recsrce_set(struct snd_card *card, int slot)
433 {
434         struct snd_mixer_oss *mixer = card->mixer_oss;
435         if (mixer)
436                 mixer->mask_recsrc |= 1 << slot;
437 }
438
439 static int snd_mixer_oss_recsrce_get(struct snd_card *card, int slot)
440 {
441         struct snd_mixer_oss *mixer = card->mixer_oss;
442         if (mixer && (mixer->mask_recsrc & (1 << slot)))
443                 return 1;
444         return 0;
445 }
446 #endif
447
448 #define SNDRV_MIXER_OSS_SIGNATURE               0x65999250
449
450 #define SNDRV_MIXER_OSS_ITEM_GLOBAL     0
451 #define SNDRV_MIXER_OSS_ITEM_GSWITCH    1
452 #define SNDRV_MIXER_OSS_ITEM_GROUTE     2
453 #define SNDRV_MIXER_OSS_ITEM_GVOLUME    3
454 #define SNDRV_MIXER_OSS_ITEM_PSWITCH    4
455 #define SNDRV_MIXER_OSS_ITEM_PROUTE     5
456 #define SNDRV_MIXER_OSS_ITEM_PVOLUME    6
457 #define SNDRV_MIXER_OSS_ITEM_CSWITCH    7
458 #define SNDRV_MIXER_OSS_ITEM_CROUTE     8
459 #define SNDRV_MIXER_OSS_ITEM_CVOLUME    9
460 #define SNDRV_MIXER_OSS_ITEM_CAPTURE    10
461
462 #define SNDRV_MIXER_OSS_ITEM_COUNT      11
463
464 #define SNDRV_MIXER_OSS_PRESENT_GLOBAL  (1<<0)
465 #define SNDRV_MIXER_OSS_PRESENT_GSWITCH (1<<1)
466 #define SNDRV_MIXER_OSS_PRESENT_GROUTE  (1<<2)
467 #define SNDRV_MIXER_OSS_PRESENT_GVOLUME (1<<3)
468 #define SNDRV_MIXER_OSS_PRESENT_PSWITCH (1<<4)
469 #define SNDRV_MIXER_OSS_PRESENT_PROUTE  (1<<5)
470 #define SNDRV_MIXER_OSS_PRESENT_PVOLUME (1<<6)
471 #define SNDRV_MIXER_OSS_PRESENT_CSWITCH (1<<7)
472 #define SNDRV_MIXER_OSS_PRESENT_CROUTE  (1<<8)
473 #define SNDRV_MIXER_OSS_PRESENT_CVOLUME (1<<9)
474 #define SNDRV_MIXER_OSS_PRESENT_CAPTURE (1<<10)
475
476 struct slot {
477         unsigned int signature;
478         unsigned int present;
479         unsigned int channels;
480         unsigned int numid[SNDRV_MIXER_OSS_ITEM_COUNT];
481         unsigned int capture_item;
482         struct snd_mixer_oss_assign_table *assigned;
483         unsigned int allocated: 1;
484 };
485
486 #define ID_UNKNOWN      ((unsigned int)-1)
487
488 static struct snd_kcontrol *snd_mixer_oss_test_id(struct snd_mixer_oss *mixer, const char *name, int index)
489 {
490         struct snd_card *card = mixer->card;
491         struct snd_ctl_elem_id id;
492         
493         memset(&id, 0, sizeof(id));
494         id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
495         strcpy(id.name, name);
496         id.index = index;
497         return snd_ctl_find_id(card, &id);
498 }
499
500 static void snd_mixer_oss_get_volume1_vol(struct snd_mixer_oss_file *fmixer,
501                                           struct snd_mixer_oss_slot *pslot,
502                                           unsigned int numid,
503                                           int *left, int *right)
504 {
505         struct snd_ctl_elem_info *uinfo;
506         struct snd_ctl_elem_value *uctl;
507         struct snd_kcontrol *kctl;
508         struct snd_card *card = fmixer->card;
509
510         if (numid == ID_UNKNOWN)
511                 return;
512         down_read(&card->controls_rwsem);
513         if ((kctl = snd_ctl_find_numid(card, numid)) == NULL) {
514                 up_read(&card->controls_rwsem);
515                 return;
516         }
517         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
518         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
519         if (uinfo == NULL || uctl == NULL)
520                 goto __unalloc;
521         if (kctl->info(kctl, uinfo))
522                 goto __unalloc;
523         if (kctl->get(kctl, uctl))
524                 goto __unalloc;
525         if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
526             uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
527                 goto __unalloc;
528         *left = snd_mixer_oss_conv1(uctl->value.integer.value[0], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[0]);
529         if (uinfo->count > 1)
530                 *right = snd_mixer_oss_conv1(uctl->value.integer.value[1], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[1]);
531       __unalloc:
532         up_read(&card->controls_rwsem);
533         kfree(uctl);
534         kfree(uinfo);
535 }
536
537 static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer,
538                                          struct snd_mixer_oss_slot *pslot,
539                                          unsigned int numid,
540                                          int *left, int *right,
541                                          int route)
542 {
543         struct snd_ctl_elem_info *uinfo;
544         struct snd_ctl_elem_value *uctl;
545         struct snd_kcontrol *kctl;
546         struct snd_card *card = fmixer->card;
547
548         if (numid == ID_UNKNOWN)
549                 return;
550         down_read(&card->controls_rwsem);
551         if ((kctl = snd_ctl_find_numid(card, numid)) == NULL) {
552                 up_read(&card->controls_rwsem);
553                 return;
554         }
555         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
556         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
557         if (uinfo == NULL || uctl == NULL)
558                 goto __unalloc;
559         if (kctl->info(kctl, uinfo))
560                 goto __unalloc;
561         if (kctl->get(kctl, uctl))
562                 goto __unalloc;
563         if (!uctl->value.integer.value[0]) {
564                 *left = 0;
565                 if (uinfo->count == 1)
566                         *right = 0;
567         }
568         if (uinfo->count > 1 && !uctl->value.integer.value[route ? 3 : 1])
569                 *right = 0;
570       __unalloc:
571         up_read(&card->controls_rwsem);
572         kfree(uctl);
573         kfree(uinfo);
574 }
575
576 static int snd_mixer_oss_get_volume1(struct snd_mixer_oss_file *fmixer,
577                                      struct snd_mixer_oss_slot *pslot,
578                                      int *left, int *right)
579 {
580         struct slot *slot = (struct slot *)pslot->private_data;
581         
582         *left = *right = 100;
583         if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
584                 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
585         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
586                 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
587         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
588                 snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
589         }
590         if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
591                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
592         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
593                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
594         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
595                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
596         } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
597                 snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
598         }
599         return 0;
600 }
601
602 static void snd_mixer_oss_put_volume1_vol(struct snd_mixer_oss_file *fmixer,
603                                           struct snd_mixer_oss_slot *pslot,
604                                           unsigned int numid,
605                                           int left, int right)
606 {
607         struct snd_ctl_elem_info *uinfo;
608         struct snd_ctl_elem_value *uctl;
609         struct snd_kcontrol *kctl;
610         struct snd_card *card = fmixer->card;
611         int res;
612
613         if (numid == ID_UNKNOWN)
614                 return;
615         down_read(&card->controls_rwsem);
616         if ((kctl = snd_ctl_find_numid(card, numid)) == NULL)
617                 return;
618         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
619         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
620         if (uinfo == NULL || uctl == NULL)
621                 goto __unalloc;
622         if (kctl->info(kctl, uinfo))
623                 goto __unalloc;
624         if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
625             uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
626                 goto __unalloc;
627         uctl->value.integer.value[0] = snd_mixer_oss_conv2(left, uinfo->value.integer.min, uinfo->value.integer.max);
628         if (uinfo->count > 1)
629                 uctl->value.integer.value[1] = snd_mixer_oss_conv2(right, uinfo->value.integer.min, uinfo->value.integer.max);
630         if ((res = kctl->put(kctl, uctl)) < 0)
631                 goto __unalloc;
632         if (res > 0)
633                 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
634       __unalloc:
635         up_read(&card->controls_rwsem);
636         kfree(uctl);
637         kfree(uinfo);
638 }
639
640 static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer,
641                                          struct snd_mixer_oss_slot *pslot,
642                                          unsigned int numid,
643                                          int left, int right,
644                                          int route)
645 {
646         struct snd_ctl_elem_info *uinfo;
647         struct snd_ctl_elem_value *uctl;
648         struct snd_kcontrol *kctl;
649         struct snd_card *card = fmixer->card;
650         int res;
651
652         if (numid == ID_UNKNOWN)
653                 return;
654         down_read(&card->controls_rwsem);
655         if ((kctl = snd_ctl_find_numid(card, numid)) == NULL) {
656                 up_read(&fmixer->card->controls_rwsem);
657                 return;
658         }
659         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
660         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
661         if (uinfo == NULL || uctl == NULL)
662                 goto __unalloc;
663         if (kctl->info(kctl, uinfo))
664                 goto __unalloc;
665         if (uinfo->count > 1) {
666                 uctl->value.integer.value[0] = left > 0 ? 1 : 0;
667                 uctl->value.integer.value[route ? 3 : 1] = right > 0 ? 1 : 0;
668                 if (route) {
669                         uctl->value.integer.value[1] =
670                         uctl->value.integer.value[2] = 0;
671                 }
672         } else {
673                 uctl->value.integer.value[0] = (left > 0 || right > 0) ? 1 : 0;
674         }
675         if ((res = kctl->put(kctl, uctl)) < 0)
676                 goto __unalloc;
677         if (res > 0)
678                 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
679       __unalloc:
680         up_read(&card->controls_rwsem);
681         kfree(uctl);
682         kfree(uinfo);
683 }
684
685 static 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 = (struct 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
734 static 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 = (struct 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
747 static 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 = (struct 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
760 static 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 = (struct 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
770 static 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 = (struct 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
780 static 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;
788         struct snd_ctl_elem_value *uctl;
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                 err = -ENOMEM;
795                 goto __unlock;
796         }
797         down_read(&card->controls_rwsem);
798         kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
799         if (! kctl) {
800                 err = -ENOENT;
801                 goto __unlock;
802         }
803         if ((err = kctl->info(kctl, uinfo)) < 0)
804                 goto __unlock;
805         if ((err = kctl->get(kctl, uctl)) < 0)
806                 goto __unlock;
807         for (idx = 0; idx < 32; idx++) {
808                 if (!(mixer->mask_recsrc & (1 << idx)))
809                         continue;
810                 pslot = &mixer->slots[idx];
811                 slot = (struct slot *)pslot->private_data;
812                 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
813                         continue;
814                 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
815                         continue;
816                 if (slot->capture_item == uctl->value.enumerated.item[0]) {
817                         *active_index = idx;
818                         break;
819                 }
820         }
821         err = 0;
822       __unlock:
823         up_read(&card->controls_rwsem);
824         kfree(uctl);
825         kfree(uinfo);
826         return err;
827 }
828
829 static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int active_index)
830 {
831         struct snd_card *card = fmixer->card;
832         struct snd_mixer_oss *mixer = fmixer->mixer;
833         struct snd_kcontrol *kctl;
834         struct snd_mixer_oss_slot *pslot;
835         struct slot *slot = NULL;
836         struct snd_ctl_elem_info *uinfo;
837         struct snd_ctl_elem_value *uctl;
838         int err;
839         unsigned int idx;
840
841         uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
842         uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
843         if (uinfo == NULL || uctl == NULL) {
844                 err = -ENOMEM;
845                 goto __unlock;
846         }
847         down_read(&card->controls_rwsem);
848         kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
849         if (! kctl) {
850                 err = -ENOENT;
851                 goto __unlock;
852         }
853         if ((err = kctl->info(kctl, uinfo)) < 0)
854                 goto __unlock;
855         for (idx = 0; idx < 32; idx++) {
856                 if (!(mixer->mask_recsrc & (1 << idx)))
857                         continue;
858                 pslot = &mixer->slots[idx];
859                 slot = (struct slot *)pslot->private_data;
860                 if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
861                         continue;
862                 if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
863                         continue;
864                 if (idx == active_index)
865                         break;
866                 slot = NULL;
867         }
868         if (! slot)
869                 goto __unlock;
870         for (idx = 0; idx < uinfo->count; idx++)
871                 uctl->value.enumerated.item[idx] = slot->capture_item;
872         err = kctl->put(kctl, uctl);
873         if (err > 0)
874                 snd_ctl_notify(fmixer->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
875         err = 0;
876       __unlock:
877         up_read(&card->controls_rwsem);
878         kfree(uctl);
879         kfree(uinfo);
880         return err;
881 }
882
883 struct snd_mixer_oss_assign_table {
884         int oss_id;
885         const char *name;
886         int index;
887 };
888
889 static int snd_mixer_oss_build_test(struct snd_mixer_oss *mixer, struct slot *slot, const char *name, int index, int item)
890 {
891         struct snd_ctl_elem_info *info;
892         struct snd_kcontrol *kcontrol;
893         struct snd_card *card = mixer->card;
894         int err;
895
896         down_read(&card->controls_rwsem);
897         kcontrol = snd_mixer_oss_test_id(mixer, name, index);
898         if (kcontrol == NULL) {
899                 up_read(&card->controls_rwsem);
900                 return 0;
901         }
902         info = kmalloc(sizeof(*info), GFP_KERNEL);
903         if (! info) {
904                 up_read(&card->controls_rwsem);
905                 return -ENOMEM;
906         }
907         if ((err = kcontrol->info(kcontrol, info)) < 0) {
908                 up_read(&card->controls_rwsem);
909                 kfree(info);
910                 return err;
911         }
912         slot->numid[item] = kcontrol->id.numid;
913         up_read(&card->controls_rwsem);
914         if (info->count > slot->channels)
915                 slot->channels = info->count;
916         slot->present |= 1 << item;
917         kfree(info);
918         return 0;
919 }
920
921 static void snd_mixer_oss_slot_free(struct snd_mixer_oss_slot *chn)
922 {
923         struct slot *p = (struct slot *)chn->private_data;
924         if (p) {
925                 if (p->allocated && p->assigned) {
926                         kfree(p->assigned->name);
927                         kfree(p->assigned);
928                 }
929                 kfree(p);
930         }
931 }
932
933 static void mixer_slot_clear(struct snd_mixer_oss_slot *rslot)
934 {
935         int idx = rslot->number; /* remember this */
936         if (rslot->private_free)
937                 rslot->private_free(rslot);
938         memset(rslot, 0, sizeof(*rslot));
939         rslot->number = idx;
940 }
941
942 /* In a separate function to keep gcc 3.2 happy - do NOT merge this in
943    snd_mixer_oss_build_input! */
944 static int snd_mixer_oss_build_test_all(struct snd_mixer_oss *mixer,
945                                         struct snd_mixer_oss_assign_table *ptr,
946                                         struct slot *slot)
947 {
948         char str[64];
949         int err;
950
951         err = snd_mixer_oss_build_test(mixer, slot, ptr->name, ptr->index,
952                                        SNDRV_MIXER_OSS_ITEM_GLOBAL);
953         if (err)
954                 return err;
955         sprintf(str, "%s Switch", ptr->name);
956         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
957                                        SNDRV_MIXER_OSS_ITEM_GSWITCH);
958         if (err)
959                 return err;
960         sprintf(str, "%s Route", ptr->name);
961         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
962                                        SNDRV_MIXER_OSS_ITEM_GROUTE);
963         if (err)
964                 return err;
965         sprintf(str, "%s Volume", ptr->name);
966         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
967                                        SNDRV_MIXER_OSS_ITEM_GVOLUME);
968         if (err)
969                 return err;
970         sprintf(str, "%s Playback Switch", ptr->name);
971         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
972                                        SNDRV_MIXER_OSS_ITEM_PSWITCH);
973         if (err)
974                 return err;
975         sprintf(str, "%s Playback Route", ptr->name);
976         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
977                                        SNDRV_MIXER_OSS_ITEM_PROUTE);
978         if (err)
979                 return err;
980         sprintf(str, "%s Playback Volume", ptr->name);
981         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
982                                        SNDRV_MIXER_OSS_ITEM_PVOLUME);
983         if (err)
984                 return err;
985         sprintf(str, "%s Capture Switch", ptr->name);
986         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
987                                        SNDRV_MIXER_OSS_ITEM_CSWITCH);
988         if (err)
989                 return err;
990         sprintf(str, "%s Capture Route", ptr->name);
991         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
992                                        SNDRV_MIXER_OSS_ITEM_CROUTE);
993         if (err)
994                 return err;
995         sprintf(str, "%s Capture Volume", ptr->name);
996         err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
997                                        SNDRV_MIXER_OSS_ITEM_CVOLUME);
998         if (err)
999                 return err;
1000
1001         return 0;
1002 }
1003
1004 /*
1005  * build an OSS mixer element.
1006  * ptr_allocated means the entry is dynamically allocated (change via proc file).
1007  * when replace_old = 1, the old entry is replaced with the new one.
1008  */
1009 static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer, struct snd_mixer_oss_assign_table *ptr, int ptr_allocated, int replace_old)
1010 {
1011         struct slot slot;
1012         struct slot *pslot;
1013         struct snd_kcontrol *kctl;
1014         struct snd_mixer_oss_slot *rslot;
1015         char str[64];   
1016         
1017         /* check if already assigned */
1018         if (mixer->slots[ptr->oss_id].get_volume && ! replace_old)
1019                 return 0;
1020
1021         memset(&slot, 0, sizeof(slot));
1022         memset(slot.numid, 0xff, sizeof(slot.numid)); /* ID_UNKNOWN */
1023         if (snd_mixer_oss_build_test_all(mixer, ptr, &slot))
1024                 return 0;
1025         down_read(&mixer->card->controls_rwsem);
1026         if (ptr->index == 0 && (kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0)) != NULL) {
1027                 struct snd_ctl_elem_info *uinfo;
1028
1029                 uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
1030                 if (! uinfo) {
1031                         up_read(&mixer->card->controls_rwsem);
1032                         return -ENOMEM;
1033                 }
1034                         
1035                 if (kctl->info(kctl, uinfo)) {
1036                         up_read(&mixer->card->controls_rwsem);
1037                         return 0;
1038                 }
1039                 strcpy(str, ptr->name);
1040                 if (!strcmp(str, "Master"))
1041                         strcpy(str, "Mix");
1042                 if (!strcmp(str, "Master Mono"))
1043                         strcpy(str, "Mix Mono");
1044                 slot.capture_item = 0;
1045                 if (!strcmp(uinfo->value.enumerated.name, str)) {
1046                         slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1047                 } else {
1048                         for (slot.capture_item = 1; slot.capture_item < uinfo->value.enumerated.items; slot.capture_item++) {
1049                                 uinfo->value.enumerated.item = slot.capture_item;
1050                                 if (kctl->info(kctl, uinfo)) {
1051                                         up_read(&mixer->card->controls_rwsem);
1052                                         return 0;
1053                                 }
1054                                 if (!strcmp(uinfo->value.enumerated.name, str)) {
1055                                         slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
1056                                         break;
1057                                 }
1058                         }
1059                 }
1060                 kfree(uinfo);
1061         }
1062         up_read(&mixer->card->controls_rwsem);
1063         if (slot.present != 0) {
1064                 pslot = kmalloc(sizeof(slot), GFP_KERNEL);
1065                 if (! pslot)
1066                         return -ENOMEM;
1067                 *pslot = slot;
1068                 pslot->signature = SNDRV_MIXER_OSS_SIGNATURE;
1069                 pslot->assigned = ptr;
1070                 pslot->allocated = ptr_allocated;
1071                 rslot = &mixer->slots[ptr->oss_id];
1072                 mixer_slot_clear(rslot);
1073                 rslot->stereo = slot.channels > 1 ? 1 : 0;
1074                 rslot->get_volume = snd_mixer_oss_get_volume1;
1075                 rslot->put_volume = snd_mixer_oss_put_volume1;
1076                 /* note: ES18xx have both Capture Source and XX Capture Volume !!! */
1077                 if (slot.present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
1078                         rslot->get_recsrc = snd_mixer_oss_get_recsrc1_sw;
1079                         rslot->put_recsrc = snd_mixer_oss_put_recsrc1_sw;
1080                 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
1081                         rslot->get_recsrc = snd_mixer_oss_get_recsrc1_route;
1082                         rslot->put_recsrc = snd_mixer_oss_put_recsrc1_route;
1083                 } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CAPTURE) {
1084                         mixer->mask_recsrc |= 1 << ptr->oss_id;
1085                 }
1086                 rslot->private_data = pslot;
1087                 rslot->private_free = snd_mixer_oss_slot_free;
1088                 return 1;
1089         }
1090         return 0;
1091 }
1092
1093 #ifdef CONFIG_PROC_FS
1094 /*
1095  */
1096 #define MIXER_VOL(name) [SOUND_MIXER_##name] = #name
1097 static char *oss_mixer_names[SNDRV_OSS_MAX_MIXERS] = {
1098         MIXER_VOL(VOLUME),
1099         MIXER_VOL(BASS),
1100         MIXER_VOL(TREBLE),
1101         MIXER_VOL(SYNTH),
1102         MIXER_VOL(PCM),
1103         MIXER_VOL(SPEAKER),
1104         MIXER_VOL(LINE),
1105         MIXER_VOL(MIC),
1106         MIXER_VOL(CD),
1107         MIXER_VOL(IMIX),
1108         MIXER_VOL(ALTPCM),
1109         MIXER_VOL(RECLEV),
1110         MIXER_VOL(IGAIN),
1111         MIXER_VOL(OGAIN),
1112         MIXER_VOL(LINE1),
1113         MIXER_VOL(LINE2),
1114         MIXER_VOL(LINE3),
1115         MIXER_VOL(DIGITAL1),
1116         MIXER_VOL(DIGITAL2),
1117         MIXER_VOL(DIGITAL3),
1118         MIXER_VOL(PHONEIN),
1119         MIXER_VOL(PHONEOUT),
1120         MIXER_VOL(VIDEO),
1121         MIXER_VOL(RADIO),
1122         MIXER_VOL(MONITOR),
1123 };
1124         
1125 /*
1126  *  /proc interface
1127  */
1128
1129 static void snd_mixer_oss_proc_read(struct snd_info_entry *entry,
1130                                     struct snd_info_buffer *buffer)
1131 {
1132         struct snd_mixer_oss *mixer = entry->private_data;
1133         int i;
1134
1135         mutex_lock(&mixer->reg_mutex);
1136         for (i = 0; i < SNDRV_OSS_MAX_MIXERS; i++) {
1137                 struct slot *p;
1138
1139                 if (! oss_mixer_names[i])
1140                         continue;
1141                 p = (struct slot *)mixer->slots[i].private_data;
1142                 snd_iprintf(buffer, "%s ", oss_mixer_names[i]);
1143                 if (p && p->assigned)
1144                         snd_iprintf(buffer, "\"%s\" %d\n",
1145                                     p->assigned->name,
1146                                     p->assigned->index);
1147                 else
1148                         snd_iprintf(buffer, "\"\" 0\n");
1149         }
1150         mutex_unlock(&mixer->reg_mutex);
1151 }
1152
1153 static void snd_mixer_oss_proc_write(struct snd_info_entry *entry,
1154                                      struct snd_info_buffer *buffer)
1155 {
1156         struct snd_mixer_oss *mixer = entry->private_data;
1157         char line[128], str[32], idxstr[16];
1158         const char *cptr;
1159         int ch, idx;
1160         struct snd_mixer_oss_assign_table *tbl;
1161         struct slot *slot;
1162
1163         while (!snd_info_get_line(buffer, line, sizeof(line))) {
1164                 cptr = snd_info_get_str(str, line, sizeof(str));
1165                 for (ch = 0; ch < SNDRV_OSS_MAX_MIXERS; ch++)
1166                         if (oss_mixer_names[ch] && strcmp(oss_mixer_names[ch], str) == 0)
1167                                 break;
1168                 if (ch >= SNDRV_OSS_MAX_MIXERS) {
1169                         snd_printk(KERN_ERR "mixer_oss: invalid OSS volume '%s'\n", str);
1170                         continue;
1171                 }
1172                 cptr = snd_info_get_str(str, cptr, sizeof(str));
1173                 if (! *str) {
1174                         /* remove the entry */
1175                         mutex_lock(&mixer->reg_mutex);
1176                         mixer_slot_clear(&mixer->slots[ch]);
1177                         mutex_unlock(&mixer->reg_mutex);
1178                         continue;
1179                 }
1180                 snd_info_get_str(idxstr, cptr, sizeof(idxstr));
1181                 idx = simple_strtoul(idxstr, NULL, 10);
1182                 if (idx >= 0x4000) { /* too big */
1183                         snd_printk(KERN_ERR "mixer_oss: invalid index %d\n", idx);
1184                         continue;
1185                 }
1186                 mutex_lock(&mixer->reg_mutex);
1187                 slot = (struct slot *)mixer->slots[ch].private_data;
1188                 if (slot && slot->assigned &&
1189                     slot->assigned->index == idx && ! strcmp(slot->assigned->name, str))
1190                         /* not changed */
1191                         goto __unlock;
1192                 tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
1193                 if (! tbl) {
1194                         snd_printk(KERN_ERR "mixer_oss: no memory\n");
1195                         goto __unlock;
1196                 }
1197                 tbl->oss_id = ch;
1198                 tbl->name = kstrdup(str, GFP_KERNEL);
1199                 if (! tbl->name) {
1200                         kfree(tbl);
1201                         goto __unlock;
1202                 }
1203                 tbl->index = idx;
1204                 if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) {
1205                         kfree(tbl->name);
1206                         kfree(tbl);
1207                 }
1208         __unlock:
1209                 mutex_unlock(&mixer->reg_mutex);
1210         }
1211 }
1212
1213 static void snd_mixer_oss_proc_init(struct snd_mixer_oss *mixer)
1214 {
1215         struct snd_info_entry *entry;
1216
1217         entry = snd_info_create_card_entry(mixer->card, "oss_mixer",
1218                                            mixer->card->proc_root);
1219         if (! entry)
1220                 return;
1221         entry->content = SNDRV_INFO_CONTENT_TEXT;
1222         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
1223         entry->c.text.read = snd_mixer_oss_proc_read;
1224         entry->c.text.write = snd_mixer_oss_proc_write;
1225         entry->private_data = mixer;
1226         if (snd_info_register(entry) < 0) {
1227                 snd_info_free_entry(entry);
1228                 entry = NULL;
1229         }
1230         mixer->proc_entry = entry;
1231 }
1232
1233 static void snd_mixer_oss_proc_done(struct snd_mixer_oss *mixer)
1234 {
1235         snd_info_free_entry(mixer->proc_entry);
1236         mixer->proc_entry = NULL;
1237 }
1238 #else /* !CONFIG_PROC_FS */
1239 #define snd_mixer_oss_proc_init(mix)
1240 #define snd_mixer_oss_proc_done(mix)
1241 #endif /* CONFIG_PROC_FS */
1242
1243 static void snd_mixer_oss_build(struct snd_mixer_oss *mixer)
1244 {
1245         static struct snd_mixer_oss_assign_table table[] = {
1246                 { SOUND_MIXER_VOLUME,   "Master",               0 },
1247                 { SOUND_MIXER_VOLUME,   "Front",                0 }, /* fallback */
1248                 { SOUND_MIXER_BASS,     "Tone Control - Bass",  0 },
1249                 { SOUND_MIXER_TREBLE,   "Tone Control - Treble", 0 },
1250                 { SOUND_MIXER_SYNTH,    "Synth",                0 },
1251                 { SOUND_MIXER_SYNTH,    "FM",                   0 }, /* fallback */
1252                 { SOUND_MIXER_SYNTH,    "Music",                0 }, /* fallback */
1253                 { SOUND_MIXER_PCM,      "PCM",                  0 },
1254                 { SOUND_MIXER_SPEAKER,  "PC Speaker",           0 },
1255                 { SOUND_MIXER_LINE,     "Line",                 0 },
1256                 { SOUND_MIXER_MIC,      "Mic",                  0 },
1257                 { SOUND_MIXER_CD,       "CD",                   0 },
1258                 { SOUND_MIXER_IMIX,     "Monitor Mix",          0 },
1259                 { SOUND_MIXER_ALTPCM,   "PCM",                  1 },
1260                 { SOUND_MIXER_ALTPCM,   "Headphone",            0 }, /* fallback */
1261                 { SOUND_MIXER_ALTPCM,   "Wave",                 0 }, /* fallback */
1262                 { SOUND_MIXER_RECLEV,   "-- nothing --",        0 },
1263                 { SOUND_MIXER_IGAIN,    "Capture",              0 },
1264                 { SOUND_MIXER_OGAIN,    "Playback",             0 },
1265                 { SOUND_MIXER_LINE1,    "Aux",                  0 },
1266                 { SOUND_MIXER_LINE2,    "Aux",                  1 },
1267                 { SOUND_MIXER_LINE3,    "Aux",                  2 },
1268                 { SOUND_MIXER_DIGITAL1, "Digital",              0 },
1269                 { SOUND_MIXER_DIGITAL1, "IEC958",               0 }, /* fallback */
1270                 { SOUND_MIXER_DIGITAL1, "IEC958 Optical",       0 }, /* fallback */
1271                 { SOUND_MIXER_DIGITAL1, "IEC958 Coaxial",       0 }, /* fallback */
1272                 { SOUND_MIXER_DIGITAL2, "Digital",              1 },
1273                 { SOUND_MIXER_DIGITAL3, "Digital",              2 },
1274                 { SOUND_MIXER_PHONEIN,  "Phone",                0 },
1275                 { SOUND_MIXER_PHONEOUT, "Master Mono",          0 },
1276                 { SOUND_MIXER_PHONEOUT, "Speaker",              0 }, /*fallback*/
1277                 { SOUND_MIXER_PHONEOUT, "Mono",                 0 }, /*fallback*/
1278                 { SOUND_MIXER_PHONEOUT, "Phone",                0 }, /* fallback */
1279                 { SOUND_MIXER_VIDEO,    "Video",                0 },
1280                 { SOUND_MIXER_RADIO,    "Radio",                0 },
1281                 { SOUND_MIXER_MONITOR,  "Monitor",              0 }
1282         };
1283         unsigned int idx;
1284         
1285         for (idx = 0; idx < ARRAY_SIZE(table); idx++)
1286                 snd_mixer_oss_build_input(mixer, &table[idx], 0, 0);
1287         if (mixer->mask_recsrc) {
1288                 mixer->get_recsrc = snd_mixer_oss_get_recsrc2;
1289                 mixer->put_recsrc = snd_mixer_oss_put_recsrc2;
1290         }
1291 }
1292
1293 /*
1294  *
1295  */
1296
1297 static int snd_mixer_oss_free1(void *private)
1298 {
1299         struct snd_mixer_oss *mixer = private;
1300         struct snd_card *card;
1301         int idx;
1302  
1303         if (!mixer)
1304                 return 0;
1305         card = mixer->card;
1306         if (snd_BUG_ON(mixer != card->mixer_oss))
1307                 return -ENXIO;
1308         card->mixer_oss = NULL;
1309         for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) {
1310                 struct snd_mixer_oss_slot *chn = &mixer->slots[idx];
1311                 if (chn->private_free)
1312                         chn->private_free(chn);
1313         }
1314         kfree(mixer);
1315         return 0;
1316 }
1317
1318 static int snd_mixer_oss_notify_handler(struct snd_card *card, int cmd)
1319 {
1320         struct snd_mixer_oss *mixer;
1321
1322         if (cmd == SND_MIXER_OSS_NOTIFY_REGISTER) {
1323                 char name[128];
1324                 int idx, err;
1325
1326                 mixer = kcalloc(2, sizeof(*mixer), GFP_KERNEL);
1327                 if (mixer == NULL)
1328                         return -ENOMEM;
1329                 mutex_init(&mixer->reg_mutex);
1330                 sprintf(name, "mixer%i%i", card->number, 0);
1331                 if ((err = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER,
1332                                                    card, 0,
1333                                                    &snd_mixer_oss_f_ops, card,
1334                                                    name)) < 0) {
1335                         snd_printk(KERN_ERR "unable to register OSS mixer device %i:%i\n",
1336                                    card->number, 0);
1337                         kfree(mixer);
1338                         return err;
1339                 }
1340                 mixer->oss_dev_alloc = 1;
1341                 mixer->card = card;
1342                 if (*card->mixername)
1343                         strlcpy(mixer->name, card->mixername, sizeof(mixer->name));
1344                 else
1345                         strlcpy(mixer->name, name, sizeof(mixer->name));
1346 #ifdef SNDRV_OSS_INFO_DEV_MIXERS
1347                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIXERS,
1348                                       card->number,
1349                                       mixer->name);
1350 #endif
1351                 for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++)
1352                         mixer->slots[idx].number = idx;
1353                 card->mixer_oss = mixer;
1354                 snd_mixer_oss_build(mixer);
1355                 snd_mixer_oss_proc_init(mixer);
1356         } else {
1357                 mixer = card->mixer_oss;
1358                 if (mixer == NULL)
1359                         return 0;
1360                 if (mixer->oss_dev_alloc) {
1361 #ifdef SNDRV_OSS_INFO_DEV_MIXERS
1362                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIXERS, mixer->card->number);
1363 #endif
1364                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, mixer->card, 0);
1365                         mixer->oss_dev_alloc = 0;
1366                 }
1367                 if (cmd == SND_MIXER_OSS_NOTIFY_DISCONNECT)
1368                         return 0;
1369                 snd_mixer_oss_proc_done(mixer);
1370                 return snd_mixer_oss_free1(mixer);
1371         }
1372         return 0;
1373 }
1374
1375 static int __init alsa_mixer_oss_init(void)
1376 {
1377         int idx;
1378         
1379         snd_mixer_oss_notify_callback = snd_mixer_oss_notify_handler;
1380         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1381                 if (snd_cards[idx])
1382                         snd_mixer_oss_notify_handler(snd_cards[idx], SND_MIXER_OSS_NOTIFY_REGISTER);
1383         }
1384         return 0;
1385 }
1386
1387 static void __exit alsa_mixer_oss_exit(void)
1388 {
1389         int idx;
1390
1391         snd_mixer_oss_notify_callback = NULL;
1392         for (idx = 0; idx < SNDRV_CARDS; idx++) {
1393                 if (snd_cards[idx])
1394                         snd_mixer_oss_notify_handler(snd_cards[idx], SND_MIXER_OSS_NOTIFY_FREE);
1395         }
1396 }
1397
1398 module_init(alsa_mixer_oss_init)
1399 module_exit(alsa_mixer_oss_exit)
1400
1401 EXPORT_SYMBOL(snd_mixer_oss_ioctl_card);