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TOMOYO Linux Cross Reference
Linux/sound/pci/ctxfi/ctmixer.c

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  1 /**
  2  * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
  3  *
  4  * This source file is released under GPL v2 license (no other versions).
  5  * See the COPYING file included in the main directory of this source
  6  * distribution for the license terms and conditions.
  7  *
  8  * @File        ctmixer.c
  9  *
 10  * @Brief
 11  * This file contains the implementation of alsa mixer device functions.
 12  *
 13  * @Author      Liu Chun
 14  * @Date        May 28 2008
 15  *
 16  */
 17 
 18 
 19 #include "ctmixer.h"
 20 #include "ctamixer.h"
 21 #include <linux/slab.h>
 22 #include <sound/core.h>
 23 #include <sound/control.h>
 24 #include <sound/asoundef.h>
 25 #include <sound/pcm.h>
 26 #include <sound/tlv.h>
 27 
 28 enum CT_SUM_CTL {
 29         SUM_IN_F,
 30         SUM_IN_R,
 31         SUM_IN_C,
 32         SUM_IN_S,
 33         SUM_IN_F_C,
 34 
 35         NUM_CT_SUMS
 36 };
 37 
 38 enum CT_AMIXER_CTL {
 39         /* volume control mixers */
 40         AMIXER_MASTER_F,
 41         AMIXER_MASTER_R,
 42         AMIXER_MASTER_C,
 43         AMIXER_MASTER_S,
 44         AMIXER_PCM_F,
 45         AMIXER_PCM_R,
 46         AMIXER_PCM_C,
 47         AMIXER_PCM_S,
 48         AMIXER_SPDIFI,
 49         AMIXER_LINEIN,
 50         AMIXER_MIC,
 51         AMIXER_SPDIFO,
 52         AMIXER_WAVE_F,
 53         AMIXER_WAVE_R,
 54         AMIXER_WAVE_C,
 55         AMIXER_WAVE_S,
 56         AMIXER_MASTER_F_C,
 57         AMIXER_PCM_F_C,
 58         AMIXER_SPDIFI_C,
 59         AMIXER_LINEIN_C,
 60         AMIXER_MIC_C,
 61 
 62         /* this should always be the last one */
 63         NUM_CT_AMIXERS
 64 };
 65 
 66 enum CTALSA_MIXER_CTL {
 67         /* volume control mixers */
 68         MIXER_MASTER_P,
 69         MIXER_PCM_P,
 70         MIXER_LINEIN_P,
 71         MIXER_MIC_P,
 72         MIXER_SPDIFI_P,
 73         MIXER_SPDIFO_P,
 74         MIXER_WAVEF_P,
 75         MIXER_WAVER_P,
 76         MIXER_WAVEC_P,
 77         MIXER_WAVES_P,
 78         MIXER_MASTER_C,
 79         MIXER_PCM_C,
 80         MIXER_LINEIN_C,
 81         MIXER_MIC_C,
 82         MIXER_SPDIFI_C,
 83 
 84         /* switch control mixers */
 85         MIXER_PCM_C_S,
 86         MIXER_LINEIN_C_S,
 87         MIXER_MIC_C_S,
 88         MIXER_SPDIFI_C_S,
 89         MIXER_SPDIFO_P_S,
 90         MIXER_WAVEF_P_S,
 91         MIXER_WAVER_P_S,
 92         MIXER_WAVEC_P_S,
 93         MIXER_WAVES_P_S,
 94         MIXER_DIGITAL_IO_S,
 95         MIXER_IEC958_MASK,
 96         MIXER_IEC958_DEFAULT,
 97         MIXER_IEC958_STREAM,
 98 
 99         /* this should always be the last one */
100         NUM_CTALSA_MIXERS
101 };
102 
103 #define VOL_MIXER_START         MIXER_MASTER_P
104 #define VOL_MIXER_END           MIXER_SPDIFI_C
105 #define VOL_MIXER_NUM           (VOL_MIXER_END - VOL_MIXER_START + 1)
106 #define SWH_MIXER_START         MIXER_PCM_C_S
107 #define SWH_MIXER_END           MIXER_DIGITAL_IO_S
108 #define SWH_CAPTURE_START       MIXER_PCM_C_S
109 #define SWH_CAPTURE_END         MIXER_SPDIFI_C_S
110 
111 #define CHN_NUM         2
112 
113 struct ct_kcontrol_init {
114         unsigned char ctl;
115         char *name;
116 };
117 
118 static struct ct_kcontrol_init
119 ct_kcontrol_init_table[NUM_CTALSA_MIXERS] = {
120         [MIXER_MASTER_P] = {
121                 .ctl = 1,
122                 .name = "Master Playback Volume",
123         },
124         [MIXER_MASTER_C] = {
125                 .ctl = 1,
126                 .name = "Master Capture Volume",
127         },
128         [MIXER_PCM_P] = {
129                 .ctl = 1,
130                 .name = "PCM Playback Volume",
131         },
132         [MIXER_PCM_C] = {
133                 .ctl = 1,
134                 .name = "PCM Capture Volume",
135         },
136         [MIXER_LINEIN_P] = {
137                 .ctl = 1,
138                 .name = "Line Playback Volume",
139         },
140         [MIXER_LINEIN_C] = {
141                 .ctl = 1,
142                 .name = "Line Capture Volume",
143         },
144         [MIXER_MIC_P] = {
145                 .ctl = 1,
146                 .name = "Mic Playback Volume",
147         },
148         [MIXER_MIC_C] = {
149                 .ctl = 1,
150                 .name = "Mic Capture Volume",
151         },
152         [MIXER_SPDIFI_P] = {
153                 .ctl = 1,
154                 .name = "IEC958 Playback Volume",
155         },
156         [MIXER_SPDIFI_C] = {
157                 .ctl = 1,
158                 .name = "IEC958 Capture Volume",
159         },
160         [MIXER_SPDIFO_P] = {
161                 .ctl = 1,
162                 .name = "Digital Playback Volume",
163         },
164         [MIXER_WAVEF_P] = {
165                 .ctl = 1,
166                 .name = "Front Playback Volume",
167         },
168         [MIXER_WAVES_P] = {
169                 .ctl = 1,
170                 .name = "Side Playback Volume",
171         },
172         [MIXER_WAVEC_P] = {
173                 .ctl = 1,
174                 .name = "Center/LFE Playback Volume",
175         },
176         [MIXER_WAVER_P] = {
177                 .ctl = 1,
178                 .name = "Surround Playback Volume",
179         },
180         [MIXER_PCM_C_S] = {
181                 .ctl = 1,
182                 .name = "PCM Capture Switch",
183         },
184         [MIXER_LINEIN_C_S] = {
185                 .ctl = 1,
186                 .name = "Line Capture Switch",
187         },
188         [MIXER_MIC_C_S] = {
189                 .ctl = 1,
190                 .name = "Mic Capture Switch",
191         },
192         [MIXER_SPDIFI_C_S] = {
193                 .ctl = 1,
194                 .name = "IEC958 Capture Switch",
195         },
196         [MIXER_SPDIFO_P_S] = {
197                 .ctl = 1,
198                 .name = "Digital Playback Switch",
199         },
200         [MIXER_WAVEF_P_S] = {
201                 .ctl = 1,
202                 .name = "Front Playback Switch",
203         },
204         [MIXER_WAVES_P_S] = {
205                 .ctl = 1,
206                 .name = "Side Playback Switch",
207         },
208         [MIXER_WAVEC_P_S] = {
209                 .ctl = 1,
210                 .name = "Center/LFE Playback Switch",
211         },
212         [MIXER_WAVER_P_S] = {
213                 .ctl = 1,
214                 .name = "Surround Playback Switch",
215         },
216         [MIXER_DIGITAL_IO_S] = {
217                 .ctl = 0,
218                 .name = "Digit-IO Playback Switch",
219         },
220 };
221 
222 static void
223 ct_mixer_recording_select(struct ct_mixer *mixer, enum CT_AMIXER_CTL type);
224 
225 static void
226 ct_mixer_recording_unselect(struct ct_mixer *mixer, enum CT_AMIXER_CTL type);
227 
228 /* FIXME: this static looks like it would fail if more than one card was */
229 /* installed. */
230 static struct snd_kcontrol *kctls[2] = {NULL};
231 
232 static enum CT_AMIXER_CTL get_amixer_index(enum CTALSA_MIXER_CTL alsa_index)
233 {
234         switch (alsa_index) {
235         case MIXER_MASTER_P:    return AMIXER_MASTER_F;
236         case MIXER_MASTER_C:    return AMIXER_MASTER_F_C;
237         case MIXER_PCM_P:       return AMIXER_PCM_F;
238         case MIXER_PCM_C:
239         case MIXER_PCM_C_S:     return AMIXER_PCM_F_C;
240         case MIXER_LINEIN_P:    return AMIXER_LINEIN;
241         case MIXER_LINEIN_C:
242         case MIXER_LINEIN_C_S:  return AMIXER_LINEIN_C;
243         case MIXER_MIC_P:       return AMIXER_MIC;
244         case MIXER_MIC_C:
245         case MIXER_MIC_C_S:     return AMIXER_MIC_C;
246         case MIXER_SPDIFI_P:    return AMIXER_SPDIFI;
247         case MIXER_SPDIFI_C:
248         case MIXER_SPDIFI_C_S:  return AMIXER_SPDIFI_C;
249         case MIXER_SPDIFO_P:    return AMIXER_SPDIFO;
250         case MIXER_WAVEF_P:     return AMIXER_WAVE_F;
251         case MIXER_WAVES_P:     return AMIXER_WAVE_S;
252         case MIXER_WAVEC_P:     return AMIXER_WAVE_C;
253         case MIXER_WAVER_P:     return AMIXER_WAVE_R;
254         default:                return NUM_CT_AMIXERS;
255         }
256 }
257 
258 static enum CT_AMIXER_CTL get_recording_amixer(enum CT_AMIXER_CTL index)
259 {
260         switch (index) {
261         case AMIXER_MASTER_F:   return AMIXER_MASTER_F_C;
262         case AMIXER_PCM_F:      return AMIXER_PCM_F_C;
263         case AMIXER_SPDIFI:     return AMIXER_SPDIFI_C;
264         case AMIXER_LINEIN:     return AMIXER_LINEIN_C;
265         case AMIXER_MIC:        return AMIXER_MIC_C;
266         default:                return NUM_CT_AMIXERS;
267         }
268 }
269 
270 static unsigned char
271 get_switch_state(struct ct_mixer *mixer, enum CTALSA_MIXER_CTL type)
272 {
273         return (mixer->switch_state & (0x1 << (type - SWH_MIXER_START)))
274                 ? 1 : 0;
275 }
276 
277 static void
278 set_switch_state(struct ct_mixer *mixer,
279                  enum CTALSA_MIXER_CTL type, unsigned char state)
280 {
281         if (state)
282                 mixer->switch_state |= (0x1 << (type - SWH_MIXER_START));
283         else
284                 mixer->switch_state &= ~(0x1 << (type - SWH_MIXER_START));
285 }
286 
287 #if 0 /* not used */
288 /* Map integer value ranging from 0 to 65535 to 14-bit float value ranging
289  * from 2^-6 to (1+1023/1024) */
290 static unsigned int uint16_to_float14(unsigned int x)
291 {
292         unsigned int i;
293 
294         if (x < 17)
295                 return 0;
296 
297         x *= 2031;
298         x /= 65535;
299         x += 16;
300 
301         /* i <= 6 */
302         for (i = 0; !(x & 0x400); i++)
303                 x <<= 1;
304 
305         x = (((7 - i) & 0x7) << 10) | (x & 0x3ff);
306 
307         return x;
308 }
309 
310 static unsigned int float14_to_uint16(unsigned int x)
311 {
312         unsigned int e;
313 
314         if (!x)
315                 return x;
316 
317         e = (x >> 10) & 0x7;
318         x &= 0x3ff;
319         x += 1024;
320         x >>= (7 - e);
321         x -= 16;
322         x *= 65535;
323         x /= 2031;
324 
325         return x;
326 }
327 #endif /* not used */
328 
329 #define VOL_SCALE       0x1c
330 #define VOL_MAX         0x100
331 
332 static const DECLARE_TLV_DB_SCALE(ct_vol_db_scale, -6400, 25, 1);
333 
334 static int ct_alsa_mix_volume_info(struct snd_kcontrol *kcontrol,
335                                    struct snd_ctl_elem_info *uinfo)
336 {
337         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
338         uinfo->count = 2;
339         uinfo->value.integer.min = 0;
340         uinfo->value.integer.max = VOL_MAX;
341 
342         return 0;
343 }
344 
345 static int ct_alsa_mix_volume_get(struct snd_kcontrol *kcontrol,
346                                   struct snd_ctl_elem_value *ucontrol)
347 {
348         struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
349         enum CT_AMIXER_CTL type = get_amixer_index(kcontrol->private_value);
350         struct amixer *amixer;
351         int i, val;
352 
353         for (i = 0; i < 2; i++) {
354                 amixer = ((struct ct_mixer *)atc->mixer)->
355                                                 amixers[type*CHN_NUM+i];
356                 val = amixer->ops->get_scale(amixer) / VOL_SCALE;
357                 if (val < 0)
358                         val = 0;
359                 else if (val > VOL_MAX)
360                         val = VOL_MAX;
361                 ucontrol->value.integer.value[i] = val;
362         }
363 
364         return 0;
365 }
366 
367 static int ct_alsa_mix_volume_put(struct snd_kcontrol *kcontrol,
368                                   struct snd_ctl_elem_value *ucontrol)
369 {
370         struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
371         struct ct_mixer *mixer = atc->mixer;
372         enum CT_AMIXER_CTL type = get_amixer_index(kcontrol->private_value);
373         struct amixer *amixer;
374         int i, j, val, oval, change = 0;
375 
376         for (i = 0; i < 2; i++) {
377                 val = ucontrol->value.integer.value[i];
378                 if (val < 0)
379                         val = 0;
380                 else if (val > VOL_MAX)
381                         val = VOL_MAX;
382                 val *= VOL_SCALE;
383                 amixer = mixer->amixers[type*CHN_NUM+i];
384                 oval = amixer->ops->get_scale(amixer);
385                 if (val != oval) {
386                         amixer->ops->set_scale(amixer, val);
387                         amixer->ops->commit_write(amixer);
388                         change = 1;
389                         /* Synchronize Master/PCM playback AMIXERs. */
390                         if (AMIXER_MASTER_F == type || AMIXER_PCM_F == type) {
391                                 for (j = 1; j < 4; j++) {
392                                         amixer = mixer->
393                                                 amixers[(type+j)*CHN_NUM+i];
394                                         amixer->ops->set_scale(amixer, val);
395                                         amixer->ops->commit_write(amixer);
396                                 }
397                         }
398                 }
399         }
400 
401         return change;
402 }
403 
404 static struct snd_kcontrol_new vol_ctl = {
405         .access         = SNDRV_CTL_ELEM_ACCESS_READWRITE |
406                           SNDRV_CTL_ELEM_ACCESS_TLV_READ,
407         .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
408         .info           = ct_alsa_mix_volume_info,
409         .get            = ct_alsa_mix_volume_get,
410         .put            = ct_alsa_mix_volume_put,
411         .tlv            = { .p =  ct_vol_db_scale },
412 };
413 
414 static int output_switch_info(struct snd_kcontrol *kcontrol,
415                               struct snd_ctl_elem_info *info)
416 {
417         static const char *const names[3] = {
418           "FP Headphones", "Headphones", "Speakers"
419         };
420 
421         return snd_ctl_enum_info(info, 1, 3, names);
422 }
423 
424 static int output_switch_get(struct snd_kcontrol *kcontrol,
425                              struct snd_ctl_elem_value *ucontrol)
426 {
427         struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
428         ucontrol->value.enumerated.item[0] = atc->output_switch_get(atc);
429         return 0;
430 }
431 
432 static int output_switch_put(struct snd_kcontrol *kcontrol,
433                              struct snd_ctl_elem_value *ucontrol)
434 {
435         struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
436         if (ucontrol->value.enumerated.item[0] > 2)
437                 return -EINVAL;
438         return atc->output_switch_put(atc, ucontrol->value.enumerated.item[0]);
439 }
440 
441 static struct snd_kcontrol_new output_ctl = {
442         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
443         .name = "Analog Output Playback Enum",
444         .info = output_switch_info,
445         .get = output_switch_get,
446         .put = output_switch_put,
447 };
448 
449 static int mic_source_switch_info(struct snd_kcontrol *kcontrol,
450                               struct snd_ctl_elem_info *info)
451 {
452         static const char *const names[3] = {
453           "Mic", "FP Mic", "Aux"
454         };
455 
456         return snd_ctl_enum_info(info, 1, 3, names);
457 }
458 
459 static int mic_source_switch_get(struct snd_kcontrol *kcontrol,
460                              struct snd_ctl_elem_value *ucontrol)
461 {
462         struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
463         ucontrol->value.enumerated.item[0] = atc->mic_source_switch_get(atc);
464         return 0;
465 }
466 
467 static int mic_source_switch_put(struct snd_kcontrol *kcontrol,
468                              struct snd_ctl_elem_value *ucontrol)
469 {
470         struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
471         if (ucontrol->value.enumerated.item[0] > 2)
472                 return -EINVAL;
473         return atc->mic_source_switch_put(atc,
474                                         ucontrol->value.enumerated.item[0]);
475 }
476 
477 static struct snd_kcontrol_new mic_source_ctl = {
478         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
479         .name = "Mic Source Capture Enum",
480         .info = mic_source_switch_info,
481         .get = mic_source_switch_get,
482         .put = mic_source_switch_put,
483 };
484 
485 static void
486 do_line_mic_switch(struct ct_atc *atc, enum CTALSA_MIXER_CTL type)
487 {
488 
489         if (MIXER_LINEIN_C_S == type) {
490                 atc->select_line_in(atc);
491                 set_switch_state(atc->mixer, MIXER_MIC_C_S, 0);
492                 snd_ctl_notify(atc->card, SNDRV_CTL_EVENT_MASK_VALUE,
493                                                         &kctls[1]->id);
494         } else if (MIXER_MIC_C_S == type) {
495                 atc->select_mic_in(atc);
496                 set_switch_state(atc->mixer, MIXER_LINEIN_C_S, 0);
497                 snd_ctl_notify(atc->card, SNDRV_CTL_EVENT_MASK_VALUE,
498                                                         &kctls[0]->id);
499         }
500 }
501 
502 static void
503 do_digit_io_switch(struct ct_atc *atc, int state)
504 {
505         struct ct_mixer *mixer = atc->mixer;
506 
507         if (state) {
508                 atc->select_digit_io(atc);
509                 atc->spdif_out_unmute(atc,
510                                 get_switch_state(mixer, MIXER_SPDIFO_P_S));
511                 atc->spdif_in_unmute(atc, 1);
512                 atc->line_in_unmute(atc, 0);
513                 return;
514         }
515 
516         if (get_switch_state(mixer, MIXER_LINEIN_C_S))
517                 atc->select_line_in(atc);
518         else if (get_switch_state(mixer, MIXER_MIC_C_S))
519                 atc->select_mic_in(atc);
520 
521         atc->spdif_out_unmute(atc, 0);
522         atc->spdif_in_unmute(atc, 0);
523         atc->line_in_unmute(atc, 1);
524         return;
525 }
526 
527 static void do_switch(struct ct_atc *atc, enum CTALSA_MIXER_CTL type, int state)
528 {
529         struct ct_mixer *mixer = atc->mixer;
530         struct capabilities cap = atc->capabilities(atc);
531 
532         /* Do changes in mixer. */
533         if ((SWH_CAPTURE_START <= type) && (SWH_CAPTURE_END >= type)) {
534                 if (state) {
535                         ct_mixer_recording_select(mixer,
536                                                   get_amixer_index(type));
537                 } else {
538                         ct_mixer_recording_unselect(mixer,
539                                                     get_amixer_index(type));
540                 }
541         }
542         /* Do changes out of mixer. */
543         if (!cap.dedicated_mic &&
544             (MIXER_LINEIN_C_S == type || MIXER_MIC_C_S == type)) {
545                 if (state)
546                         do_line_mic_switch(atc, type);
547                 atc->line_in_unmute(atc, state);
548         } else if (cap.dedicated_mic && (MIXER_LINEIN_C_S == type))
549                 atc->line_in_unmute(atc, state);
550         else if (cap.dedicated_mic && (MIXER_MIC_C_S == type))
551                 atc->mic_unmute(atc, state);
552         else if (MIXER_SPDIFI_C_S == type)
553                 atc->spdif_in_unmute(atc, state);
554         else if (MIXER_WAVEF_P_S == type)
555                 atc->line_front_unmute(atc, state);
556         else if (MIXER_WAVES_P_S == type)
557                 atc->line_surround_unmute(atc, state);
558         else if (MIXER_WAVEC_P_S == type)
559                 atc->line_clfe_unmute(atc, state);
560         else if (MIXER_WAVER_P_S == type)
561                 atc->line_rear_unmute(atc, state);
562         else if (MIXER_SPDIFO_P_S == type)
563                 atc->spdif_out_unmute(atc, state);
564         else if (MIXER_DIGITAL_IO_S == type)
565                 do_digit_io_switch(atc, state);
566 
567         return;
568 }
569 
570 static int ct_alsa_mix_switch_info(struct snd_kcontrol *kcontrol,
571                                    struct snd_ctl_elem_info *uinfo)
572 {
573         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
574         uinfo->count = 1;
575         uinfo->value.integer.min = 0;
576         uinfo->value.integer.max = 1;
577         uinfo->value.integer.step = 1;
578 
579         return 0;
580 }
581 
582 static int ct_alsa_mix_switch_get(struct snd_kcontrol *kcontrol,
583                                   struct snd_ctl_elem_value *ucontrol)
584 {
585         struct ct_mixer *mixer =
586                 ((struct ct_atc *)snd_kcontrol_chip(kcontrol))->mixer;
587         enum CTALSA_MIXER_CTL type = kcontrol->private_value;
588 
589         ucontrol->value.integer.value[0] = get_switch_state(mixer, type);
590         return 0;
591 }
592 
593 static int ct_alsa_mix_switch_put(struct snd_kcontrol *kcontrol,
594                                   struct snd_ctl_elem_value *ucontrol)
595 {
596         struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
597         struct ct_mixer *mixer = atc->mixer;
598         enum CTALSA_MIXER_CTL type = kcontrol->private_value;
599         int state;
600 
601         state = ucontrol->value.integer.value[0];
602         if (get_switch_state(mixer, type) == state)
603                 return 0;
604 
605         set_switch_state(mixer, type, state);
606         do_switch(atc, type, state);
607 
608         return 1;
609 }
610 
611 static struct snd_kcontrol_new swh_ctl = {
612         .access         = SNDRV_CTL_ELEM_ACCESS_READWRITE,
613         .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
614         .info           = ct_alsa_mix_switch_info,
615         .get            = ct_alsa_mix_switch_get,
616         .put            = ct_alsa_mix_switch_put
617 };
618 
619 static int ct_spdif_info(struct snd_kcontrol *kcontrol,
620                          struct snd_ctl_elem_info *uinfo)
621 {
622         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
623         uinfo->count = 1;
624         return 0;
625 }
626 
627 static int ct_spdif_get_mask(struct snd_kcontrol *kcontrol,
628                              struct snd_ctl_elem_value *ucontrol)
629 {
630         ucontrol->value.iec958.status[0] = 0xff;
631         ucontrol->value.iec958.status[1] = 0xff;
632         ucontrol->value.iec958.status[2] = 0xff;
633         ucontrol->value.iec958.status[3] = 0xff;
634         return 0;
635 }
636 
637 static int ct_spdif_get(struct snd_kcontrol *kcontrol,
638                         struct snd_ctl_elem_value *ucontrol)
639 {
640         struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
641         unsigned int status;
642 
643         atc->spdif_out_get_status(atc, &status);
644 
645         if (status == 0)
646                 status = SNDRV_PCM_DEFAULT_CON_SPDIF;
647 
648         ucontrol->value.iec958.status[0] = (status >> 0) & 0xff;
649         ucontrol->value.iec958.status[1] = (status >> 8) & 0xff;
650         ucontrol->value.iec958.status[2] = (status >> 16) & 0xff;
651         ucontrol->value.iec958.status[3] = (status >> 24) & 0xff;
652 
653         return 0;
654 }
655 
656 static int ct_spdif_put(struct snd_kcontrol *kcontrol,
657                         struct snd_ctl_elem_value *ucontrol)
658 {
659         struct ct_atc *atc = snd_kcontrol_chip(kcontrol);
660         int change;
661         unsigned int status, old_status;
662 
663         status = (ucontrol->value.iec958.status[0] << 0) |
664                  (ucontrol->value.iec958.status[1] << 8) |
665                  (ucontrol->value.iec958.status[2] << 16) |
666                  (ucontrol->value.iec958.status[3] << 24);
667 
668         atc->spdif_out_get_status(atc, &old_status);
669         change = (old_status != status);
670         if (change)
671                 atc->spdif_out_set_status(atc, status);
672 
673         return change;
674 }
675 
676 static struct snd_kcontrol_new iec958_mask_ctl = {
677         .access         = SNDRV_CTL_ELEM_ACCESS_READ,
678         .iface          = SNDRV_CTL_ELEM_IFACE_PCM,
679         .name           = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
680         .count          = 1,
681         .info           = ct_spdif_info,
682         .get            = ct_spdif_get_mask,
683         .private_value  = MIXER_IEC958_MASK
684 };
685 
686 static struct snd_kcontrol_new iec958_default_ctl = {
687         .iface          = SNDRV_CTL_ELEM_IFACE_PCM,
688         .name           = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
689         .count          = 1,
690         .info           = ct_spdif_info,
691         .get            = ct_spdif_get,
692         .put            = ct_spdif_put,
693         .private_value  = MIXER_IEC958_DEFAULT
694 };
695 
696 static struct snd_kcontrol_new iec958_ctl = {
697         .access         = SNDRV_CTL_ELEM_ACCESS_READWRITE,
698         .iface          = SNDRV_CTL_ELEM_IFACE_PCM,
699         .name           = SNDRV_CTL_NAME_IEC958("", PLAYBACK, PCM_STREAM),
700         .count          = 1,
701         .info           = ct_spdif_info,
702         .get            = ct_spdif_get,
703         .put            = ct_spdif_put,
704         .private_value  = MIXER_IEC958_STREAM
705 };
706 
707 #define NUM_IEC958_CTL 3
708 
709 static int
710 ct_mixer_kcontrol_new(struct ct_mixer *mixer, struct snd_kcontrol_new *new)
711 {
712         struct snd_kcontrol *kctl;
713         int err;
714 
715         kctl = snd_ctl_new1(new, mixer->atc);
716         if (!kctl)
717                 return -ENOMEM;
718 
719         if (SNDRV_CTL_ELEM_IFACE_PCM == kctl->id.iface)
720                 kctl->id.device = IEC958;
721 
722         err = snd_ctl_add(mixer->atc->card, kctl);
723         if (err)
724                 return err;
725 
726         switch (new->private_value) {
727         case MIXER_LINEIN_C_S:
728                 kctls[0] = kctl; break;
729         case MIXER_MIC_C_S:
730                 kctls[1] = kctl; break;
731         default:
732                 break;
733         }
734 
735         return 0;
736 }
737 
738 static int ct_mixer_kcontrols_create(struct ct_mixer *mixer)
739 {
740         enum CTALSA_MIXER_CTL type;
741         struct ct_atc *atc = mixer->atc;
742         struct capabilities cap = atc->capabilities(atc);
743         int err;
744 
745         /* Create snd kcontrol instances on demand */
746         for (type = VOL_MIXER_START; type <= VOL_MIXER_END; type++) {
747                 if (ct_kcontrol_init_table[type].ctl) {
748                         vol_ctl.name = ct_kcontrol_init_table[type].name;
749                         vol_ctl.private_value = (unsigned long)type;
750                         err = ct_mixer_kcontrol_new(mixer, &vol_ctl);
751                         if (err)
752                                 return err;
753                 }
754         }
755 
756         ct_kcontrol_init_table[MIXER_DIGITAL_IO_S].ctl = cap.digit_io_switch;
757 
758         for (type = SWH_MIXER_START; type <= SWH_MIXER_END; type++) {
759                 if (ct_kcontrol_init_table[type].ctl) {
760                         swh_ctl.name = ct_kcontrol_init_table[type].name;
761                         swh_ctl.private_value = (unsigned long)type;
762                         err = ct_mixer_kcontrol_new(mixer, &swh_ctl);
763                         if (err)
764                                 return err;
765                 }
766         }
767 
768         err = ct_mixer_kcontrol_new(mixer, &iec958_mask_ctl);
769         if (err)
770                 return err;
771 
772         err = ct_mixer_kcontrol_new(mixer, &iec958_default_ctl);
773         if (err)
774                 return err;
775 
776         err = ct_mixer_kcontrol_new(mixer, &iec958_ctl);
777         if (err)
778                 return err;
779 
780         if (cap.output_switch) {
781                 err = ct_mixer_kcontrol_new(mixer, &output_ctl);
782                 if (err)
783                         return err;
784         }
785 
786         if (cap.mic_source_switch) {
787                 err = ct_mixer_kcontrol_new(mixer, &mic_source_ctl);
788                 if (err)
789                         return err;
790         }
791         atc->line_front_unmute(atc, 1);
792         set_switch_state(mixer, MIXER_WAVEF_P_S, 1);
793         atc->line_surround_unmute(atc, 0);
794         set_switch_state(mixer, MIXER_WAVES_P_S, 0);
795         atc->line_clfe_unmute(atc, 0);
796         set_switch_state(mixer, MIXER_WAVEC_P_S, 0);
797         atc->line_rear_unmute(atc, 0);
798         set_switch_state(mixer, MIXER_WAVER_P_S, 0);
799         atc->spdif_out_unmute(atc, 0);
800         set_switch_state(mixer, MIXER_SPDIFO_P_S, 0);
801         atc->line_in_unmute(atc, 0);
802         if (cap.dedicated_mic)
803                 atc->mic_unmute(atc, 0);
804         atc->spdif_in_unmute(atc, 0);
805         set_switch_state(mixer, MIXER_PCM_C_S, 0);
806         set_switch_state(mixer, MIXER_LINEIN_C_S, 0);
807         set_switch_state(mixer, MIXER_SPDIFI_C_S, 0);
808 
809         return 0;
810 }
811 
812 static void
813 ct_mixer_recording_select(struct ct_mixer *mixer, enum CT_AMIXER_CTL type)
814 {
815         struct amixer *amix_d;
816         struct sum *sum_c;
817         int i;
818 
819         for (i = 0; i < 2; i++) {
820                 amix_d = mixer->amixers[type*CHN_NUM+i];
821                 sum_c = mixer->sums[SUM_IN_F_C*CHN_NUM+i];
822                 amix_d->ops->set_sum(amix_d, sum_c);
823                 amix_d->ops->commit_write(amix_d);
824         }
825 }
826 
827 static void
828 ct_mixer_recording_unselect(struct ct_mixer *mixer, enum CT_AMIXER_CTL type)
829 {
830         struct amixer *amix_d;
831         int i;
832 
833         for (i = 0; i < 2; i++) {
834                 amix_d = mixer->amixers[type*CHN_NUM+i];
835                 amix_d->ops->set_sum(amix_d, NULL);
836                 amix_d->ops->commit_write(amix_d);
837         }
838 }
839 
840 static int ct_mixer_get_resources(struct ct_mixer *mixer)
841 {
842         struct sum_mgr *sum_mgr;
843         struct sum *sum;
844         struct sum_desc sum_desc = {0};
845         struct amixer_mgr *amixer_mgr;
846         struct amixer *amixer;
847         struct amixer_desc am_desc = {0};
848         int err;
849         int i;
850 
851         /* Allocate sum resources for mixer obj */
852         sum_mgr = (struct sum_mgr *)mixer->atc->rsc_mgrs[SUM];
853         sum_desc.msr = mixer->atc->msr;
854         for (i = 0; i < (NUM_CT_SUMS * CHN_NUM); i++) {
855                 err = sum_mgr->get_sum(sum_mgr, &sum_desc, &sum);
856                 if (err) {
857                         dev_err(mixer->atc->card->dev,
858                                 "Failed to get sum resources for front output!\n");
859                         break;
860                 }
861                 mixer->sums[i] = sum;
862         }
863         if (err)
864                 goto error1;
865 
866         /* Allocate amixer resources for mixer obj */
867         amixer_mgr = (struct amixer_mgr *)mixer->atc->rsc_mgrs[AMIXER];
868         am_desc.msr = mixer->atc->msr;
869         for (i = 0; i < (NUM_CT_AMIXERS * CHN_NUM); i++) {
870                 err = amixer_mgr->get_amixer(amixer_mgr, &am_desc, &amixer);
871                 if (err) {
872                         dev_err(mixer->atc->card->dev,
873                                 "Failed to get amixer resources for mixer obj!\n");
874                         break;
875                 }
876                 mixer->amixers[i] = amixer;
877         }
878         if (err)
879                 goto error2;
880 
881         return 0;
882 
883 error2:
884         for (i = 0; i < (NUM_CT_AMIXERS * CHN_NUM); i++) {
885                 if (NULL != mixer->amixers[i]) {
886                         amixer = mixer->amixers[i];
887                         amixer_mgr->put_amixer(amixer_mgr, amixer);
888                         mixer->amixers[i] = NULL;
889                 }
890         }
891 error1:
892         for (i = 0; i < (NUM_CT_SUMS * CHN_NUM); i++) {
893                 if (NULL != mixer->sums[i]) {
894                         sum_mgr->put_sum(sum_mgr, (struct sum *)mixer->sums[i]);
895                         mixer->sums[i] = NULL;
896                 }
897         }
898 
899         return err;
900 }
901 
902 static int ct_mixer_get_mem(struct ct_mixer **rmixer)
903 {
904         struct ct_mixer *mixer;
905         int err;
906 
907         *rmixer = NULL;
908         /* Allocate mem for mixer obj */
909         mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
910         if (!mixer)
911                 return -ENOMEM;
912 
913         mixer->amixers = kzalloc(sizeof(void *)*(NUM_CT_AMIXERS*CHN_NUM),
914                                  GFP_KERNEL);
915         if (!mixer->amixers) {
916                 err = -ENOMEM;
917                 goto error1;
918         }
919         mixer->sums = kzalloc(sizeof(void *)*(NUM_CT_SUMS*CHN_NUM), GFP_KERNEL);
920         if (!mixer->sums) {
921                 err = -ENOMEM;
922                 goto error2;
923         }
924 
925         *rmixer = mixer;
926         return 0;
927 
928 error2:
929         kfree(mixer->amixers);
930 error1:
931         kfree(mixer);
932         return err;
933 }
934 
935 static int ct_mixer_topology_build(struct ct_mixer *mixer)
936 {
937         struct sum *sum;
938         struct amixer *amix_d, *amix_s;
939         enum CT_AMIXER_CTL i, j;
940 
941         /* Build topology from destination to source */
942 
943         /* Set up Master mixer */
944         for (i = AMIXER_MASTER_F, j = SUM_IN_F;
945                                         i <= AMIXER_MASTER_S; i++, j++) {
946                 amix_d = mixer->amixers[i*CHN_NUM];
947                 sum = mixer->sums[j*CHN_NUM];
948                 amix_d->ops->setup(amix_d, &sum->rsc, INIT_VOL, NULL);
949                 amix_d = mixer->amixers[i*CHN_NUM+1];
950                 sum = mixer->sums[j*CHN_NUM+1];
951                 amix_d->ops->setup(amix_d, &sum->rsc, INIT_VOL, NULL);
952         }
953 
954         /* Set up Wave-out mixer */
955         for (i = AMIXER_WAVE_F, j = AMIXER_MASTER_F;
956                                         i <= AMIXER_WAVE_S; i++, j++) {
957                 amix_d = mixer->amixers[i*CHN_NUM];
958                 amix_s = mixer->amixers[j*CHN_NUM];
959                 amix_d->ops->setup(amix_d, &amix_s->rsc, INIT_VOL, NULL);
960                 amix_d = mixer->amixers[i*CHN_NUM+1];
961                 amix_s = mixer->amixers[j*CHN_NUM+1];
962                 amix_d->ops->setup(amix_d, &amix_s->rsc, INIT_VOL, NULL);
963         }
964 
965         /* Set up S/PDIF-out mixer */
966         amix_d = mixer->amixers[AMIXER_SPDIFO*CHN_NUM];
967         amix_s = mixer->amixers[AMIXER_MASTER_F*CHN_NUM];
968         amix_d->ops->setup(amix_d, &amix_s->rsc, INIT_VOL, NULL);
969         amix_d = mixer->amixers[AMIXER_SPDIFO*CHN_NUM+1];
970         amix_s = mixer->amixers[AMIXER_MASTER_F*CHN_NUM+1];
971         amix_d->ops->setup(amix_d, &amix_s->rsc, INIT_VOL, NULL);
972 
973         /* Set up PCM-in mixer */
974         for (i = AMIXER_PCM_F, j = SUM_IN_F; i <= AMIXER_PCM_S; i++, j++) {
975                 amix_d = mixer->amixers[i*CHN_NUM];
976                 sum = mixer->sums[j*CHN_NUM];
977                 amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
978                 amix_d = mixer->amixers[i*CHN_NUM+1];
979                 sum = mixer->sums[j*CHN_NUM+1];
980                 amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
981         }
982 
983         /* Set up Line-in mixer */
984         amix_d = mixer->amixers[AMIXER_LINEIN*CHN_NUM];
985         sum = mixer->sums[SUM_IN_F*CHN_NUM];
986         amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
987         amix_d = mixer->amixers[AMIXER_LINEIN*CHN_NUM+1];
988         sum = mixer->sums[SUM_IN_F*CHN_NUM+1];
989         amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
990 
991         /* Set up Mic-in mixer */
992         amix_d = mixer->amixers[AMIXER_MIC*CHN_NUM];
993         sum = mixer->sums[SUM_IN_F*CHN_NUM];
994         amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
995         amix_d = mixer->amixers[AMIXER_MIC*CHN_NUM+1];
996         sum = mixer->sums[SUM_IN_F*CHN_NUM+1];
997         amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
998 
999         /* Set up S/PDIF-in mixer */
1000         amix_d = mixer->amixers[AMIXER_SPDIFI*CHN_NUM];
1001         sum = mixer->sums[SUM_IN_F*CHN_NUM];
1002         amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
1003         amix_d = mixer->amixers[AMIXER_SPDIFI*CHN_NUM+1];
1004         sum = mixer->sums[SUM_IN_F*CHN_NUM+1];
1005         amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
1006 
1007         /* Set up Master recording mixer */
1008         amix_d = mixer->amixers[AMIXER_MASTER_F_C*CHN_NUM];
1009         sum = mixer->sums[SUM_IN_F_C*CHN_NUM];
1010         amix_d->ops->setup(amix_d, &sum->rsc, INIT_VOL, NULL);
1011         amix_d = mixer->amixers[AMIXER_MASTER_F_C*CHN_NUM+1];
1012         sum = mixer->sums[SUM_IN_F_C*CHN_NUM+1];
1013         amix_d->ops->setup(amix_d, &sum->rsc, INIT_VOL, NULL);
1014 
1015         /* Set up PCM-in recording mixer */
1016         amix_d = mixer->amixers[AMIXER_PCM_F_C*CHN_NUM];
1017         sum = mixer->sums[SUM_IN_F_C*CHN_NUM];
1018         amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
1019         amix_d = mixer->amixers[AMIXER_PCM_F_C*CHN_NUM+1];
1020         sum = mixer->sums[SUM_IN_F_C*CHN_NUM+1];
1021         amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
1022 
1023         /* Set up Line-in recording mixer */
1024         amix_d = mixer->amixers[AMIXER_LINEIN_C*CHN_NUM];
1025         sum = mixer->sums[SUM_IN_F_C*CHN_NUM];
1026         amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
1027         amix_d = mixer->amixers[AMIXER_LINEIN_C*CHN_NUM+1];
1028         sum = mixer->sums[SUM_IN_F_C*CHN_NUM+1];
1029         amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
1030 
1031         /* Set up Mic-in recording mixer */
1032         amix_d = mixer->amixers[AMIXER_MIC_C*CHN_NUM];
1033         sum = mixer->sums[SUM_IN_F_C*CHN_NUM];
1034         amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
1035         amix_d = mixer->amixers[AMIXER_MIC_C*CHN_NUM+1];
1036         sum = mixer->sums[SUM_IN_F_C*CHN_NUM+1];
1037         amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
1038 
1039         /* Set up S/PDIF-in recording mixer */
1040         amix_d = mixer->amixers[AMIXER_SPDIFI_C*CHN_NUM];
1041         sum = mixer->sums[SUM_IN_F_C*CHN_NUM];
1042         amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
1043         amix_d = mixer->amixers[AMIXER_SPDIFI_C*CHN_NUM+1];
1044         sum = mixer->sums[SUM_IN_F_C*CHN_NUM+1];
1045         amix_d->ops->setup(amix_d, NULL, INIT_VOL, sum);
1046 
1047         return 0;
1048 }
1049 
1050 static int mixer_set_input_port(struct amixer *amixer, struct rsc *rsc)
1051 {
1052         amixer->ops->set_input(amixer, rsc);
1053         amixer->ops->commit_write(amixer);
1054 
1055         return 0;
1056 }
1057 
1058 static enum CT_AMIXER_CTL port_to_amixer(enum MIXER_PORT_T type)
1059 {
1060         switch (type) {
1061         case MIX_WAVE_FRONT:    return AMIXER_WAVE_F;
1062         case MIX_WAVE_SURROUND: return AMIXER_WAVE_S;
1063         case MIX_WAVE_CENTLFE:  return AMIXER_WAVE_C;
1064         case MIX_WAVE_REAR:     return AMIXER_WAVE_R;
1065         case MIX_PCMO_FRONT:    return AMIXER_MASTER_F_C;
1066         case MIX_SPDIF_OUT:     return AMIXER_SPDIFO;
1067         case MIX_LINE_IN:       return AMIXER_LINEIN;
1068         case MIX_MIC_IN:        return AMIXER_MIC;
1069         case MIX_SPDIF_IN:      return AMIXER_SPDIFI;
1070         case MIX_PCMI_FRONT:    return AMIXER_PCM_F;
1071         case MIX_PCMI_SURROUND: return AMIXER_PCM_S;
1072         case MIX_PCMI_CENTLFE:  return AMIXER_PCM_C;
1073         case MIX_PCMI_REAR:     return AMIXER_PCM_R;
1074         default:                return 0;
1075         }
1076 }
1077 
1078 static int mixer_get_output_ports(struct ct_mixer *mixer,
1079                                   enum MIXER_PORT_T type,
1080                                   struct rsc **rleft, struct rsc **rright)
1081 {
1082         enum CT_AMIXER_CTL amix = port_to_amixer(type);
1083 
1084         if (NULL != rleft)
1085                 *rleft = &((struct amixer *)mixer->amixers[amix*CHN_NUM])->rsc;
1086 
1087         if (NULL != rright)
1088                 *rright =
1089                         &((struct amixer *)mixer->amixers[amix*CHN_NUM+1])->rsc;
1090 
1091         return 0;
1092 }
1093 
1094 static int mixer_set_input_left(struct ct_mixer *mixer,
1095                                 enum MIXER_PORT_T type, struct rsc *rsc)
1096 {
1097         enum CT_AMIXER_CTL amix = port_to_amixer(type);
1098 
1099         mixer_set_input_port(mixer->amixers[amix*CHN_NUM], rsc);
1100         amix = get_recording_amixer(amix);
1101         if (amix < NUM_CT_AMIXERS)
1102                 mixer_set_input_port(mixer->amixers[amix*CHN_NUM], rsc);
1103 
1104         return 0;
1105 }
1106 
1107 static int
1108 mixer_set_input_right(struct ct_mixer *mixer,
1109                       enum MIXER_PORT_T type, struct rsc *rsc)
1110 {
1111         enum CT_AMIXER_CTL amix = port_to_amixer(type);
1112 
1113         mixer_set_input_port(mixer->amixers[amix*CHN_NUM+1], rsc);
1114         amix = get_recording_amixer(amix);
1115         if (amix < NUM_CT_AMIXERS)
1116                 mixer_set_input_port(mixer->amixers[amix*CHN_NUM+1], rsc);
1117 
1118         return 0;
1119 }
1120 
1121 #ifdef CONFIG_PM_SLEEP
1122 static int mixer_resume(struct ct_mixer *mixer)
1123 {
1124         int i, state;
1125         struct amixer *amixer;
1126 
1127         /* resume topology and volume gain. */
1128         for (i = 0; i < NUM_CT_AMIXERS*CHN_NUM; i++) {
1129                 amixer = mixer->amixers[i];
1130                 amixer->ops->commit_write(amixer);
1131         }
1132 
1133         /* resume switch state. */
1134         for (i = SWH_MIXER_START; i <= SWH_MIXER_END; i++) {
1135                 state = get_switch_state(mixer, i);
1136                 do_switch(mixer->atc, i, state);
1137         }
1138 
1139         return 0;
1140 }
1141 #endif
1142 
1143 int ct_mixer_destroy(struct ct_mixer *mixer)
1144 {
1145         struct sum_mgr *sum_mgr = (struct sum_mgr *)mixer->atc->rsc_mgrs[SUM];
1146         struct amixer_mgr *amixer_mgr =
1147                         (struct amixer_mgr *)mixer->atc->rsc_mgrs[AMIXER];
1148         struct amixer *amixer;
1149         int i = 0;
1150 
1151         /* Release amixer resources */
1152         for (i = 0; i < (NUM_CT_AMIXERS * CHN_NUM); i++) {
1153                 if (NULL != mixer->amixers[i]) {
1154                         amixer = mixer->amixers[i];
1155                         amixer_mgr->put_amixer(amixer_mgr, amixer);
1156                 }
1157         }
1158 
1159         /* Release sum resources */
1160         for (i = 0; i < (NUM_CT_SUMS * CHN_NUM); i++) {
1161                 if (NULL != mixer->sums[i])
1162                         sum_mgr->put_sum(sum_mgr, (struct sum *)mixer->sums[i]);
1163         }
1164 
1165         /* Release mem assigned to mixer object */
1166         kfree(mixer->sums);
1167         kfree(mixer->amixers);
1168         kfree(mixer);
1169 
1170         return 0;
1171 }
1172 
1173 int ct_mixer_create(struct ct_atc *atc, struct ct_mixer **rmixer)
1174 {
1175         struct ct_mixer *mixer;
1176         int err;
1177 
1178         *rmixer = NULL;
1179 
1180         /* Allocate mem for mixer obj */
1181         err = ct_mixer_get_mem(&mixer);
1182         if (err)
1183                 return err;
1184 
1185         mixer->switch_state = 0;
1186         mixer->atc = atc;
1187         /* Set operations */
1188         mixer->get_output_ports = mixer_get_output_ports;
1189         mixer->set_input_left = mixer_set_input_left;
1190         mixer->set_input_right = mixer_set_input_right;
1191 #ifdef CONFIG_PM_SLEEP
1192         mixer->resume = mixer_resume;
1193 #endif
1194 
1195         /* Allocate chip resources for mixer obj */
1196         err = ct_mixer_get_resources(mixer);
1197         if (err)
1198                 goto error;
1199 
1200         /* Build internal mixer topology */
1201         ct_mixer_topology_build(mixer);
1202 
1203         *rmixer = mixer;
1204 
1205         return 0;
1206 
1207 error:
1208         ct_mixer_destroy(mixer);
1209         return err;
1210 }
1211 
1212 int ct_alsa_mix_create(struct ct_atc *atc,
1213                        enum CTALSADEVS device,
1214                        const char *device_name)
1215 {
1216         int err;
1217 
1218         /* Create snd kcontrol instances on demand */
1219         /* vol_ctl.device = swh_ctl.device = device; */ /* better w/ device 0 */
1220         err = ct_mixer_kcontrols_create((struct ct_mixer *)atc->mixer);
1221         if (err)
1222                 return err;
1223 
1224         strcpy(atc->card->mixername, device_name);
1225 
1226         return 0;
1227 }
1228 

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