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ASoC: 88pm860x-codec - reset the codec correctly
[deliverable/linux.git] / sound / soc / soc-dapm.c
1 /*
2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * Features:
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
15 * DACs/ADCs.
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
20 * sinks, dacs, etc
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
22 * device reopen.
23 *
24 * Todo:
25 * o DAPM power change sequencing - allow for configurable per
26 * codec sequences.
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
30 */
31
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/async.h>
36 #include <linux/delay.h>
37 #include <linux/pm.h>
38 #include <linux/bitops.h>
39 #include <linux/platform_device.h>
40 #include <linux/jiffies.h>
41 #include <linux/debugfs.h>
42 #include <linux/slab.h>
43 #include <sound/core.h>
44 #include <sound/pcm.h>
45 #include <sound/pcm_params.h>
46 #include <sound/soc.h>
47 #include <sound/initval.h>
48
49 #include <trace/events/asoc.h>
50
51 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
52
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq[] = {
55 [snd_soc_dapm_pre] = 0,
56 [snd_soc_dapm_supply] = 1,
57 [snd_soc_dapm_micbias] = 2,
58 [snd_soc_dapm_aif_in] = 3,
59 [snd_soc_dapm_aif_out] = 3,
60 [snd_soc_dapm_mic] = 4,
61 [snd_soc_dapm_mux] = 5,
62 [snd_soc_dapm_virt_mux] = 5,
63 [snd_soc_dapm_value_mux] = 5,
64 [snd_soc_dapm_dac] = 6,
65 [snd_soc_dapm_mixer] = 7,
66 [snd_soc_dapm_mixer_named_ctl] = 7,
67 [snd_soc_dapm_pga] = 8,
68 [snd_soc_dapm_adc] = 9,
69 [snd_soc_dapm_out_drv] = 10,
70 [snd_soc_dapm_hp] = 10,
71 [snd_soc_dapm_spk] = 10,
72 [snd_soc_dapm_post] = 11,
73 };
74
75 static int dapm_down_seq[] = {
76 [snd_soc_dapm_pre] = 0,
77 [snd_soc_dapm_adc] = 1,
78 [snd_soc_dapm_hp] = 2,
79 [snd_soc_dapm_spk] = 2,
80 [snd_soc_dapm_out_drv] = 2,
81 [snd_soc_dapm_pga] = 4,
82 [snd_soc_dapm_mixer_named_ctl] = 5,
83 [snd_soc_dapm_mixer] = 5,
84 [snd_soc_dapm_dac] = 6,
85 [snd_soc_dapm_mic] = 7,
86 [snd_soc_dapm_micbias] = 8,
87 [snd_soc_dapm_mux] = 9,
88 [snd_soc_dapm_virt_mux] = 9,
89 [snd_soc_dapm_value_mux] = 9,
90 [snd_soc_dapm_aif_in] = 10,
91 [snd_soc_dapm_aif_out] = 10,
92 [snd_soc_dapm_supply] = 11,
93 [snd_soc_dapm_post] = 12,
94 };
95
96 static void pop_wait(u32 pop_time)
97 {
98 if (pop_time)
99 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
100 }
101
102 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
103 {
104 va_list args;
105 char *buf;
106
107 if (!pop_time)
108 return;
109
110 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
111 if (buf == NULL)
112 return;
113
114 va_start(args, fmt);
115 vsnprintf(buf, PAGE_SIZE, fmt, args);
116 dev_info(dev, "%s", buf);
117 va_end(args);
118
119 kfree(buf);
120 }
121
122 /* create a new dapm widget */
123 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
124 const struct snd_soc_dapm_widget *_widget)
125 {
126 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
127 }
128
129 /* get snd_card from DAPM context */
130 static inline struct snd_card *dapm_get_snd_card(
131 struct snd_soc_dapm_context *dapm)
132 {
133 if (dapm->codec)
134 return dapm->codec->card->snd_card;
135 else if (dapm->platform)
136 return dapm->platform->card->snd_card;
137 else
138 BUG();
139
140 /* unreachable */
141 return NULL;
142 }
143
144 /* get soc_card from DAPM context */
145 static inline struct snd_soc_card *dapm_get_soc_card(
146 struct snd_soc_dapm_context *dapm)
147 {
148 if (dapm->codec)
149 return dapm->codec->card;
150 else if (dapm->platform)
151 return dapm->platform->card;
152 else
153 BUG();
154
155 /* unreachable */
156 return NULL;
157 }
158
159 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
160 {
161 if (w->codec)
162 return snd_soc_read(w->codec, reg);
163 else if (w->platform)
164 return snd_soc_platform_read(w->platform, reg);
165
166 dev_err(w->dapm->dev, "no valid widget read method\n");
167 return -1;
168 }
169
170 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
171 {
172 if (w->codec)
173 return snd_soc_write(w->codec, reg, val);
174 else if (w->platform)
175 return snd_soc_platform_write(w->platform, reg, val);
176
177 dev_err(w->dapm->dev, "no valid widget write method\n");
178 return -1;
179 }
180
181 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
182 unsigned short reg, unsigned int mask, unsigned int value)
183 {
184 int change;
185 unsigned int old, new;
186 int ret;
187
188 ret = soc_widget_read(w, reg);
189 if (ret < 0)
190 return ret;
191
192 old = ret;
193 new = (old & ~mask) | (value & mask);
194 change = old != new;
195 if (change) {
196 ret = soc_widget_write(w, reg, new);
197 if (ret < 0)
198 return ret;
199 }
200
201 return change;
202 }
203
204 /**
205 * snd_soc_dapm_set_bias_level - set the bias level for the system
206 * @dapm: DAPM context
207 * @level: level to configure
208 *
209 * Configure the bias (power) levels for the SoC audio device.
210 *
211 * Returns 0 for success else error.
212 */
213 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
214 enum snd_soc_bias_level level)
215 {
216 struct snd_soc_card *card = dapm->card;
217 int ret = 0;
218
219 trace_snd_soc_bias_level_start(card, level);
220
221 if (card && card->set_bias_level)
222 ret = card->set_bias_level(card, dapm, level);
223 if (ret != 0)
224 goto out;
225
226 if (dapm->codec) {
227 if (dapm->codec->driver->set_bias_level)
228 ret = dapm->codec->driver->set_bias_level(dapm->codec,
229 level);
230 else
231 dapm->bias_level = level;
232 }
233 if (ret != 0)
234 goto out;
235
236 if (card && card->set_bias_level_post)
237 ret = card->set_bias_level_post(card, dapm, level);
238 out:
239 trace_snd_soc_bias_level_done(card, level);
240
241 return ret;
242 }
243
244 /* set up initial codec paths */
245 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
246 struct snd_soc_dapm_path *p, int i)
247 {
248 switch (w->id) {
249 case snd_soc_dapm_switch:
250 case snd_soc_dapm_mixer:
251 case snd_soc_dapm_mixer_named_ctl: {
252 int val;
253 struct soc_mixer_control *mc = (struct soc_mixer_control *)
254 w->kcontrol_news[i].private_value;
255 unsigned int reg = mc->reg;
256 unsigned int shift = mc->shift;
257 int max = mc->max;
258 unsigned int mask = (1 << fls(max)) - 1;
259 unsigned int invert = mc->invert;
260
261 val = soc_widget_read(w, reg);
262 val = (val >> shift) & mask;
263
264 if ((invert && !val) || (!invert && val))
265 p->connect = 1;
266 else
267 p->connect = 0;
268 }
269 break;
270 case snd_soc_dapm_mux: {
271 struct soc_enum *e = (struct soc_enum *)
272 w->kcontrol_news[i].private_value;
273 int val, item, bitmask;
274
275 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
276 ;
277 val = soc_widget_read(w, e->reg);
278 item = (val >> e->shift_l) & (bitmask - 1);
279
280 p->connect = 0;
281 for (i = 0; i < e->max; i++) {
282 if (!(strcmp(p->name, e->texts[i])) && item == i)
283 p->connect = 1;
284 }
285 }
286 break;
287 case snd_soc_dapm_virt_mux: {
288 struct soc_enum *e = (struct soc_enum *)
289 w->kcontrol_news[i].private_value;
290
291 p->connect = 0;
292 /* since a virtual mux has no backing registers to
293 * decide which path to connect, it will try to match
294 * with the first enumeration. This is to ensure
295 * that the default mux choice (the first) will be
296 * correctly powered up during initialization.
297 */
298 if (!strcmp(p->name, e->texts[0]))
299 p->connect = 1;
300 }
301 break;
302 case snd_soc_dapm_value_mux: {
303 struct soc_enum *e = (struct soc_enum *)
304 w->kcontrol_news[i].private_value;
305 int val, item;
306
307 val = soc_widget_read(w, e->reg);
308 val = (val >> e->shift_l) & e->mask;
309 for (item = 0; item < e->max; item++) {
310 if (val == e->values[item])
311 break;
312 }
313
314 p->connect = 0;
315 for (i = 0; i < e->max; i++) {
316 if (!(strcmp(p->name, e->texts[i])) && item == i)
317 p->connect = 1;
318 }
319 }
320 break;
321 /* does not effect routing - always connected */
322 case snd_soc_dapm_pga:
323 case snd_soc_dapm_out_drv:
324 case snd_soc_dapm_output:
325 case snd_soc_dapm_adc:
326 case snd_soc_dapm_input:
327 case snd_soc_dapm_dac:
328 case snd_soc_dapm_micbias:
329 case snd_soc_dapm_vmid:
330 case snd_soc_dapm_supply:
331 case snd_soc_dapm_aif_in:
332 case snd_soc_dapm_aif_out:
333 p->connect = 1;
334 break;
335 /* does effect routing - dynamically connected */
336 case snd_soc_dapm_hp:
337 case snd_soc_dapm_mic:
338 case snd_soc_dapm_spk:
339 case snd_soc_dapm_line:
340 case snd_soc_dapm_pre:
341 case snd_soc_dapm_post:
342 p->connect = 0;
343 break;
344 }
345 }
346
347 /* connect mux widget to its interconnecting audio paths */
348 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
349 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
350 struct snd_soc_dapm_path *path, const char *control_name,
351 const struct snd_kcontrol_new *kcontrol)
352 {
353 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
354 int i;
355
356 for (i = 0; i < e->max; i++) {
357 if (!(strcmp(control_name, e->texts[i]))) {
358 list_add(&path->list, &dapm->card->paths);
359 list_add(&path->list_sink, &dest->sources);
360 list_add(&path->list_source, &src->sinks);
361 path->name = (char*)e->texts[i];
362 dapm_set_path_status(dest, path, 0);
363 return 0;
364 }
365 }
366
367 return -ENODEV;
368 }
369
370 /* connect mixer widget to its interconnecting audio paths */
371 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
372 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
373 struct snd_soc_dapm_path *path, const char *control_name)
374 {
375 int i;
376
377 /* search for mixer kcontrol */
378 for (i = 0; i < dest->num_kcontrols; i++) {
379 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
380 list_add(&path->list, &dapm->card->paths);
381 list_add(&path->list_sink, &dest->sources);
382 list_add(&path->list_source, &src->sinks);
383 path->name = dest->kcontrol_news[i].name;
384 dapm_set_path_status(dest, path, i);
385 return 0;
386 }
387 }
388 return -ENODEV;
389 }
390
391 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
392 struct snd_soc_dapm_widget *kcontrolw,
393 const struct snd_kcontrol_new *kcontrol_new,
394 struct snd_kcontrol **kcontrol)
395 {
396 struct snd_soc_dapm_widget *w;
397 int i;
398
399 *kcontrol = NULL;
400
401 list_for_each_entry(w, &dapm->card->widgets, list) {
402 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
403 continue;
404 for (i = 0; i < w->num_kcontrols; i++) {
405 if (&w->kcontrol_news[i] == kcontrol_new) {
406 if (w->kcontrols)
407 *kcontrol = w->kcontrols[i];
408 return 1;
409 }
410 }
411 }
412
413 return 0;
414 }
415
416 /* create new dapm mixer control */
417 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
418 {
419 struct snd_soc_dapm_context *dapm = w->dapm;
420 int i, ret = 0;
421 size_t name_len, prefix_len;
422 struct snd_soc_dapm_path *path;
423 struct snd_card *card = dapm->card->snd_card;
424 const char *prefix;
425 struct snd_soc_dapm_widget_list *wlist;
426 size_t wlistsize;
427
428 if (dapm->codec)
429 prefix = dapm->codec->name_prefix;
430 else
431 prefix = NULL;
432
433 if (prefix)
434 prefix_len = strlen(prefix) + 1;
435 else
436 prefix_len = 0;
437
438 /* add kcontrol */
439 for (i = 0; i < w->num_kcontrols; i++) {
440
441 /* match name */
442 list_for_each_entry(path, &w->sources, list_sink) {
443
444 /* mixer/mux paths name must match control name */
445 if (path->name != (char *)w->kcontrol_news[i].name)
446 continue;
447
448 if (w->kcontrols[i]) {
449 path->kcontrol = w->kcontrols[i];
450 continue;
451 }
452
453 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
454 sizeof(struct snd_soc_dapm_widget *),
455 wlist = kzalloc(wlistsize, GFP_KERNEL);
456 if (wlist == NULL) {
457 dev_err(dapm->dev,
458 "asoc: can't allocate widget list for %s\n",
459 w->name);
460 return -ENOMEM;
461 }
462 wlist->num_widgets = 1;
463 wlist->widgets[0] = w;
464
465 /* add dapm control with long name.
466 * for dapm_mixer this is the concatenation of the
467 * mixer and kcontrol name.
468 * for dapm_mixer_named_ctl this is simply the
469 * kcontrol name.
470 */
471 name_len = strlen(w->kcontrol_news[i].name) + 1;
472 if (w->id != snd_soc_dapm_mixer_named_ctl)
473 name_len += 1 + strlen(w->name);
474
475 path->long_name = kmalloc(name_len, GFP_KERNEL);
476
477 if (path->long_name == NULL) {
478 kfree(wlist);
479 return -ENOMEM;
480 }
481
482 switch (w->id) {
483 default:
484 /* The control will get a prefix from
485 * the control creation process but
486 * we're also using the same prefix
487 * for widgets so cut the prefix off
488 * the front of the widget name.
489 */
490 snprintf(path->long_name, name_len, "%s %s",
491 w->name + prefix_len,
492 w->kcontrol_news[i].name);
493 break;
494 case snd_soc_dapm_mixer_named_ctl:
495 snprintf(path->long_name, name_len, "%s",
496 w->kcontrol_news[i].name);
497 break;
498 }
499
500 path->long_name[name_len - 1] = '\0';
501
502 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
503 wlist, path->long_name,
504 prefix);
505 ret = snd_ctl_add(card, path->kcontrol);
506 if (ret < 0) {
507 dev_err(dapm->dev,
508 "asoc: failed to add dapm kcontrol %s: %d\n",
509 path->long_name, ret);
510 kfree(wlist);
511 kfree(path->long_name);
512 path->long_name = NULL;
513 return ret;
514 }
515 w->kcontrols[i] = path->kcontrol;
516 }
517 }
518 return ret;
519 }
520
521 /* create new dapm mux control */
522 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
523 {
524 struct snd_soc_dapm_context *dapm = w->dapm;
525 struct snd_soc_dapm_path *path = NULL;
526 struct snd_kcontrol *kcontrol;
527 struct snd_card *card = dapm->card->snd_card;
528 const char *prefix;
529 size_t prefix_len;
530 int ret;
531 struct snd_soc_dapm_widget_list *wlist;
532 int shared, wlistentries;
533 size_t wlistsize;
534 char *name;
535
536 if (w->num_kcontrols != 1) {
537 dev_err(dapm->dev,
538 "asoc: mux %s has incorrect number of controls\n",
539 w->name);
540 return -EINVAL;
541 }
542
543 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
544 &kcontrol);
545 if (kcontrol) {
546 wlist = kcontrol->private_data;
547 wlistentries = wlist->num_widgets + 1;
548 } else {
549 wlist = NULL;
550 wlistentries = 1;
551 }
552 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
553 wlistentries * sizeof(struct snd_soc_dapm_widget *),
554 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
555 if (wlist == NULL) {
556 dev_err(dapm->dev,
557 "asoc: can't allocate widget list for %s\n", w->name);
558 return -ENOMEM;
559 }
560 wlist->num_widgets = wlistentries;
561 wlist->widgets[wlistentries - 1] = w;
562
563 if (!kcontrol) {
564 if (dapm->codec)
565 prefix = dapm->codec->name_prefix;
566 else
567 prefix = NULL;
568
569 if (shared) {
570 name = w->kcontrol_news[0].name;
571 prefix_len = 0;
572 } else {
573 name = w->name;
574 if (prefix)
575 prefix_len = strlen(prefix) + 1;
576 else
577 prefix_len = 0;
578 }
579
580 /*
581 * The control will get a prefix from the control creation
582 * process but we're also using the same prefix for widgets so
583 * cut the prefix off the front of the widget name.
584 */
585 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
586 name + prefix_len, prefix);
587 ret = snd_ctl_add(card, kcontrol);
588 if (ret < 0) {
589 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
590 w->name, ret);
591 kfree(wlist);
592 return ret;
593 }
594 }
595
596 kcontrol->private_data = wlist;
597
598 w->kcontrols[0] = kcontrol;
599
600 list_for_each_entry(path, &w->sources, list_sink)
601 path->kcontrol = kcontrol;
602
603 return 0;
604 }
605
606 /* create new dapm volume control */
607 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
608 {
609 if (w->num_kcontrols)
610 dev_err(w->dapm->dev,
611 "asoc: PGA controls not supported: '%s'\n", w->name);
612
613 return 0;
614 }
615
616 /* reset 'walked' bit for each dapm path */
617 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
618 {
619 struct snd_soc_dapm_path *p;
620
621 list_for_each_entry(p, &dapm->card->paths, list)
622 p->walked = 0;
623 }
624
625 /* We implement power down on suspend by checking the power state of
626 * the ALSA card - when we are suspending the ALSA state for the card
627 * is set to D3.
628 */
629 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
630 {
631 int level = snd_power_get_state(widget->dapm->card->snd_card);
632
633 switch (level) {
634 case SNDRV_CTL_POWER_D3hot:
635 case SNDRV_CTL_POWER_D3cold:
636 if (widget->ignore_suspend)
637 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
638 widget->name);
639 return widget->ignore_suspend;
640 default:
641 return 1;
642 }
643 }
644
645 /*
646 * Recursively check for a completed path to an active or physically connected
647 * output widget. Returns number of complete paths.
648 */
649 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
650 {
651 struct snd_soc_dapm_path *path;
652 int con = 0;
653
654 DAPM_UPDATE_STAT(widget, path_checks);
655
656 if (widget->id == snd_soc_dapm_supply)
657 return 0;
658
659 switch (widget->id) {
660 case snd_soc_dapm_adc:
661 case snd_soc_dapm_aif_out:
662 if (widget->active)
663 return snd_soc_dapm_suspend_check(widget);
664 default:
665 break;
666 }
667
668 if (widget->connected) {
669 /* connected pin ? */
670 if (widget->id == snd_soc_dapm_output && !widget->ext)
671 return snd_soc_dapm_suspend_check(widget);
672
673 /* connected jack or spk ? */
674 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
675 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
676 return snd_soc_dapm_suspend_check(widget);
677 }
678
679 list_for_each_entry(path, &widget->sinks, list_source) {
680 if (path->weak)
681 continue;
682
683 if (path->walked)
684 continue;
685
686 if (path->sink && path->connect) {
687 path->walked = 1;
688 con += is_connected_output_ep(path->sink);
689 }
690 }
691
692 return con;
693 }
694
695 /*
696 * Recursively check for a completed path to an active or physically connected
697 * input widget. Returns number of complete paths.
698 */
699 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
700 {
701 struct snd_soc_dapm_path *path;
702 int con = 0;
703
704 DAPM_UPDATE_STAT(widget, path_checks);
705
706 if (widget->id == snd_soc_dapm_supply)
707 return 0;
708
709 /* active stream ? */
710 switch (widget->id) {
711 case snd_soc_dapm_dac:
712 case snd_soc_dapm_aif_in:
713 if (widget->active)
714 return snd_soc_dapm_suspend_check(widget);
715 default:
716 break;
717 }
718
719 if (widget->connected) {
720 /* connected pin ? */
721 if (widget->id == snd_soc_dapm_input && !widget->ext)
722 return snd_soc_dapm_suspend_check(widget);
723
724 /* connected VMID/Bias for lower pops */
725 if (widget->id == snd_soc_dapm_vmid)
726 return snd_soc_dapm_suspend_check(widget);
727
728 /* connected jack ? */
729 if (widget->id == snd_soc_dapm_mic ||
730 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
731 return snd_soc_dapm_suspend_check(widget);
732 }
733
734 list_for_each_entry(path, &widget->sources, list_sink) {
735 if (path->weak)
736 continue;
737
738 if (path->walked)
739 continue;
740
741 if (path->source && path->connect) {
742 path->walked = 1;
743 con += is_connected_input_ep(path->source);
744 }
745 }
746
747 return con;
748 }
749
750 /*
751 * Handler for generic register modifier widget.
752 */
753 int dapm_reg_event(struct snd_soc_dapm_widget *w,
754 struct snd_kcontrol *kcontrol, int event)
755 {
756 unsigned int val;
757
758 if (SND_SOC_DAPM_EVENT_ON(event))
759 val = w->on_val;
760 else
761 val = w->off_val;
762
763 soc_widget_update_bits(w, -(w->reg + 1),
764 w->mask << w->shift, val << w->shift);
765
766 return 0;
767 }
768 EXPORT_SYMBOL_GPL(dapm_reg_event);
769
770 /* Generic check to see if a widget should be powered.
771 */
772 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
773 {
774 int in, out;
775
776 DAPM_UPDATE_STAT(w, power_checks);
777
778 in = is_connected_input_ep(w);
779 dapm_clear_walk(w->dapm);
780 out = is_connected_output_ep(w);
781 dapm_clear_walk(w->dapm);
782 return out != 0 && in != 0;
783 }
784
785 /* Check to see if an ADC has power */
786 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
787 {
788 int in;
789
790 DAPM_UPDATE_STAT(w, power_checks);
791
792 if (w->active) {
793 in = is_connected_input_ep(w);
794 dapm_clear_walk(w->dapm);
795 return in != 0;
796 } else {
797 return dapm_generic_check_power(w);
798 }
799 }
800
801 /* Check to see if a DAC has power */
802 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
803 {
804 int out;
805
806 DAPM_UPDATE_STAT(w, power_checks);
807
808 if (w->active) {
809 out = is_connected_output_ep(w);
810 dapm_clear_walk(w->dapm);
811 return out != 0;
812 } else {
813 return dapm_generic_check_power(w);
814 }
815 }
816
817 /* Check to see if a power supply is needed */
818 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
819 {
820 struct snd_soc_dapm_path *path;
821 int power = 0;
822
823 DAPM_UPDATE_STAT(w, power_checks);
824
825 /* Check if one of our outputs is connected */
826 list_for_each_entry(path, &w->sinks, list_source) {
827 if (path->weak)
828 continue;
829
830 if (path->connected &&
831 !path->connected(path->source, path->sink))
832 continue;
833
834 if (!path->sink)
835 continue;
836
837 if (path->sink->force) {
838 power = 1;
839 break;
840 }
841
842 if (path->sink->power_check &&
843 path->sink->power_check(path->sink)) {
844 power = 1;
845 break;
846 }
847 }
848
849 dapm_clear_walk(w->dapm);
850
851 return power;
852 }
853
854 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
855 struct snd_soc_dapm_widget *b,
856 bool power_up)
857 {
858 int *sort;
859
860 if (power_up)
861 sort = dapm_up_seq;
862 else
863 sort = dapm_down_seq;
864
865 if (sort[a->id] != sort[b->id])
866 return sort[a->id] - sort[b->id];
867 if (a->subseq != b->subseq) {
868 if (power_up)
869 return a->subseq - b->subseq;
870 else
871 return b->subseq - a->subseq;
872 }
873 if (a->reg != b->reg)
874 return a->reg - b->reg;
875 if (a->dapm != b->dapm)
876 return (unsigned long)a->dapm - (unsigned long)b->dapm;
877
878 return 0;
879 }
880
881 /* Insert a widget in order into a DAPM power sequence. */
882 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
883 struct list_head *list,
884 bool power_up)
885 {
886 struct snd_soc_dapm_widget *w;
887
888 list_for_each_entry(w, list, power_list)
889 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
890 list_add_tail(&new_widget->power_list, &w->power_list);
891 return;
892 }
893
894 list_add_tail(&new_widget->power_list, list);
895 }
896
897 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
898 struct snd_soc_dapm_widget *w, int event)
899 {
900 struct snd_soc_card *card = dapm->card;
901 const char *ev_name;
902 int power, ret;
903
904 switch (event) {
905 case SND_SOC_DAPM_PRE_PMU:
906 ev_name = "PRE_PMU";
907 power = 1;
908 break;
909 case SND_SOC_DAPM_POST_PMU:
910 ev_name = "POST_PMU";
911 power = 1;
912 break;
913 case SND_SOC_DAPM_PRE_PMD:
914 ev_name = "PRE_PMD";
915 power = 0;
916 break;
917 case SND_SOC_DAPM_POST_PMD:
918 ev_name = "POST_PMD";
919 power = 0;
920 break;
921 default:
922 BUG();
923 return;
924 }
925
926 if (w->power != power)
927 return;
928
929 if (w->event && (w->event_flags & event)) {
930 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
931 w->name, ev_name);
932 trace_snd_soc_dapm_widget_event_start(w, event);
933 ret = w->event(w, NULL, event);
934 trace_snd_soc_dapm_widget_event_done(w, event);
935 if (ret < 0)
936 pr_err("%s: %s event failed: %d\n",
937 ev_name, w->name, ret);
938 }
939 }
940
941 /* Apply the coalesced changes from a DAPM sequence */
942 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
943 struct list_head *pending)
944 {
945 struct snd_soc_card *card = dapm->card;
946 struct snd_soc_dapm_widget *w;
947 int reg, power;
948 unsigned int value = 0;
949 unsigned int mask = 0;
950 unsigned int cur_mask;
951
952 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
953 power_list)->reg;
954
955 list_for_each_entry(w, pending, power_list) {
956 cur_mask = 1 << w->shift;
957 BUG_ON(reg != w->reg);
958
959 if (w->invert)
960 power = !w->power;
961 else
962 power = w->power;
963
964 mask |= cur_mask;
965 if (power)
966 value |= cur_mask;
967
968 pop_dbg(dapm->dev, card->pop_time,
969 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
970 w->name, reg, value, mask);
971
972 /* Check for events */
973 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
974 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
975 }
976
977 if (reg >= 0) {
978 /* Any widget will do, they should all be updating the
979 * same register.
980 */
981 w = list_first_entry(pending, struct snd_soc_dapm_widget,
982 power_list);
983
984 pop_dbg(dapm->dev, card->pop_time,
985 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
986 value, mask, reg, card->pop_time);
987 pop_wait(card->pop_time);
988 soc_widget_update_bits(w, reg, mask, value);
989 }
990
991 list_for_each_entry(w, pending, power_list) {
992 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
993 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
994 }
995 }
996
997 /* Apply a DAPM power sequence.
998 *
999 * We walk over a pre-sorted list of widgets to apply power to. In
1000 * order to minimise the number of writes to the device required
1001 * multiple widgets will be updated in a single write where possible.
1002 * Currently anything that requires more than a single write is not
1003 * handled.
1004 */
1005 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1006 struct list_head *list, int event, bool power_up)
1007 {
1008 struct snd_soc_dapm_widget *w, *n;
1009 LIST_HEAD(pending);
1010 int cur_sort = -1;
1011 int cur_subseq = -1;
1012 int cur_reg = SND_SOC_NOPM;
1013 struct snd_soc_dapm_context *cur_dapm = NULL;
1014 int ret, i;
1015 int *sort;
1016
1017 if (power_up)
1018 sort = dapm_up_seq;
1019 else
1020 sort = dapm_down_seq;
1021
1022 list_for_each_entry_safe(w, n, list, power_list) {
1023 ret = 0;
1024
1025 /* Do we need to apply any queued changes? */
1026 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1027 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1028 if (!list_empty(&pending))
1029 dapm_seq_run_coalesced(cur_dapm, &pending);
1030
1031 if (cur_dapm && cur_dapm->seq_notifier) {
1032 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1033 if (sort[i] == cur_sort)
1034 cur_dapm->seq_notifier(cur_dapm,
1035 i,
1036 cur_subseq);
1037 }
1038
1039 INIT_LIST_HEAD(&pending);
1040 cur_sort = -1;
1041 cur_subseq = INT_MIN;
1042 cur_reg = SND_SOC_NOPM;
1043 cur_dapm = NULL;
1044 }
1045
1046 switch (w->id) {
1047 case snd_soc_dapm_pre:
1048 if (!w->event)
1049 list_for_each_entry_safe_continue(w, n, list,
1050 power_list);
1051
1052 if (event == SND_SOC_DAPM_STREAM_START)
1053 ret = w->event(w,
1054 NULL, SND_SOC_DAPM_PRE_PMU);
1055 else if (event == SND_SOC_DAPM_STREAM_STOP)
1056 ret = w->event(w,
1057 NULL, SND_SOC_DAPM_PRE_PMD);
1058 break;
1059
1060 case snd_soc_dapm_post:
1061 if (!w->event)
1062 list_for_each_entry_safe_continue(w, n, list,
1063 power_list);
1064
1065 if (event == SND_SOC_DAPM_STREAM_START)
1066 ret = w->event(w,
1067 NULL, SND_SOC_DAPM_POST_PMU);
1068 else if (event == SND_SOC_DAPM_STREAM_STOP)
1069 ret = w->event(w,
1070 NULL, SND_SOC_DAPM_POST_PMD);
1071 break;
1072
1073 default:
1074 /* Queue it up for application */
1075 cur_sort = sort[w->id];
1076 cur_subseq = w->subseq;
1077 cur_reg = w->reg;
1078 cur_dapm = w->dapm;
1079 list_move(&w->power_list, &pending);
1080 break;
1081 }
1082
1083 if (ret < 0)
1084 dev_err(w->dapm->dev,
1085 "Failed to apply widget power: %d\n", ret);
1086 }
1087
1088 if (!list_empty(&pending))
1089 dapm_seq_run_coalesced(cur_dapm, &pending);
1090
1091 if (cur_dapm && cur_dapm->seq_notifier) {
1092 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1093 if (sort[i] == cur_sort)
1094 cur_dapm->seq_notifier(cur_dapm,
1095 i, cur_subseq);
1096 }
1097 }
1098
1099 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1100 {
1101 struct snd_soc_dapm_update *update = dapm->update;
1102 struct snd_soc_dapm_widget *w;
1103 int ret;
1104
1105 if (!update)
1106 return;
1107
1108 w = update->widget;
1109
1110 if (w->event &&
1111 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1112 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1113 if (ret != 0)
1114 pr_err("%s DAPM pre-event failed: %d\n",
1115 w->name, ret);
1116 }
1117
1118 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1119 update->val);
1120 if (ret < 0)
1121 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1122
1123 if (w->event &&
1124 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1125 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1126 if (ret != 0)
1127 pr_err("%s DAPM post-event failed: %d\n",
1128 w->name, ret);
1129 }
1130 }
1131
1132 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1133 * they're changing state.
1134 */
1135 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1136 {
1137 struct snd_soc_dapm_context *d = data;
1138 int ret;
1139
1140 /* If we're off and we're not supposed to be go into STANDBY */
1141 if (d->bias_level == SND_SOC_BIAS_OFF &&
1142 d->target_bias_level != SND_SOC_BIAS_OFF) {
1143 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1144 if (ret != 0)
1145 dev_err(d->dev,
1146 "Failed to turn on bias: %d\n", ret);
1147 }
1148
1149 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1150 if (d->bias_level != d->target_bias_level) {
1151 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1152 if (ret != 0)
1153 dev_err(d->dev,
1154 "Failed to prepare bias: %d\n", ret);
1155 }
1156 }
1157
1158 /* Async callback run prior to DAPM sequences - brings to their final
1159 * state.
1160 */
1161 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1162 {
1163 struct snd_soc_dapm_context *d = data;
1164 int ret;
1165
1166 /* If we just powered the last thing off drop to standby bias */
1167 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1168 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1169 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1170 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1171 if (ret != 0)
1172 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1173 ret);
1174 }
1175
1176 /* If we're in standby and can support bias off then do that */
1177 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1178 d->target_bias_level == SND_SOC_BIAS_OFF) {
1179 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1180 if (ret != 0)
1181 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1182 }
1183
1184 /* If we just powered up then move to active bias */
1185 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1186 d->target_bias_level == SND_SOC_BIAS_ON) {
1187 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1188 if (ret != 0)
1189 dev_err(d->dev, "Failed to apply active bias: %d\n",
1190 ret);
1191 }
1192 }
1193
1194 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1195 struct list_head *up_list,
1196 struct list_head *down_list)
1197 {
1198 struct snd_soc_dapm_context *d;
1199 int power;
1200
1201 switch (w->id) {
1202 case snd_soc_dapm_pre:
1203 dapm_seq_insert(w, down_list, false);
1204 break;
1205 case snd_soc_dapm_post:
1206 dapm_seq_insert(w, up_list, true);
1207 break;
1208
1209 default:
1210 if (!w->power_check)
1211 break;
1212
1213 if (!w->force)
1214 power = w->power_check(w);
1215 else
1216 power = 1;
1217
1218 if (power) {
1219 d = w->dapm;
1220
1221 /* Supplies and micbiases only bring the
1222 * context up to STANDBY as unless something
1223 * else is active and passing audio they
1224 * generally don't require full power.
1225 */
1226 switch (w->id) {
1227 case snd_soc_dapm_supply:
1228 case snd_soc_dapm_micbias:
1229 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1230 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1231 break;
1232 default:
1233 d->target_bias_level = SND_SOC_BIAS_ON;
1234 break;
1235 }
1236 }
1237
1238 if (w->power == power)
1239 break;
1240
1241 trace_snd_soc_dapm_widget_power(w, power);
1242
1243 if (power)
1244 dapm_seq_insert(w, up_list, true);
1245 else
1246 dapm_seq_insert(w, down_list, false);
1247
1248 w->power = power;
1249 break;
1250 }
1251 }
1252
1253 /*
1254 * Scan each dapm widget for complete audio path.
1255 * A complete path is a route that has valid endpoints i.e.:-
1256 *
1257 * o DAC to output pin.
1258 * o Input Pin to ADC.
1259 * o Input pin to Output pin (bypass, sidetone)
1260 * o DAC to ADC (loopback).
1261 */
1262 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1263 {
1264 struct snd_soc_card *card = dapm->card;
1265 struct snd_soc_dapm_widget *w;
1266 struct snd_soc_dapm_context *d;
1267 LIST_HEAD(up_list);
1268 LIST_HEAD(down_list);
1269 LIST_HEAD(async_domain);
1270 enum snd_soc_bias_level bias;
1271
1272 trace_snd_soc_dapm_start(card);
1273
1274 list_for_each_entry(d, &card->dapm_list, list) {
1275 if (d->n_widgets || d->codec == NULL) {
1276 if (d->idle_bias_off)
1277 d->target_bias_level = SND_SOC_BIAS_OFF;
1278 else
1279 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1280 }
1281 }
1282
1283 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
1284
1285 /* Check which widgets we need to power and store them in
1286 * lists indicating if they should be powered up or down.
1287 */
1288 list_for_each_entry(w, &card->widgets, list) {
1289 dapm_power_one_widget(w, &up_list, &down_list);
1290 }
1291
1292 /* If there are no DAPM widgets then try to figure out power from the
1293 * event type.
1294 */
1295 if (!dapm->n_widgets) {
1296 switch (event) {
1297 case SND_SOC_DAPM_STREAM_START:
1298 case SND_SOC_DAPM_STREAM_RESUME:
1299 dapm->target_bias_level = SND_SOC_BIAS_ON;
1300 break;
1301 case SND_SOC_DAPM_STREAM_STOP:
1302 if (dapm->codec->active)
1303 dapm->target_bias_level = SND_SOC_BIAS_ON;
1304 else
1305 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1306 break;
1307 case SND_SOC_DAPM_STREAM_SUSPEND:
1308 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1309 break;
1310 case SND_SOC_DAPM_STREAM_NOP:
1311 dapm->target_bias_level = dapm->bias_level;
1312 break;
1313 default:
1314 break;
1315 }
1316 }
1317
1318 /* Force all contexts in the card to the same bias state */
1319 bias = SND_SOC_BIAS_OFF;
1320 list_for_each_entry(d, &card->dapm_list, list)
1321 if (d->target_bias_level > bias)
1322 bias = d->target_bias_level;
1323 list_for_each_entry(d, &card->dapm_list, list)
1324 d->target_bias_level = bias;
1325
1326 trace_snd_soc_dapm_walk_done(card);
1327
1328 /* Run all the bias changes in parallel */
1329 list_for_each_entry(d, &dapm->card->dapm_list, list)
1330 async_schedule_domain(dapm_pre_sequence_async, d,
1331 &async_domain);
1332 async_synchronize_full_domain(&async_domain);
1333
1334 /* Power down widgets first; try to avoid amplifying pops. */
1335 dapm_seq_run(dapm, &down_list, event, false);
1336
1337 dapm_widget_update(dapm);
1338
1339 /* Now power up. */
1340 dapm_seq_run(dapm, &up_list, event, true);
1341
1342 /* Run all the bias changes in parallel */
1343 list_for_each_entry(d, &dapm->card->dapm_list, list)
1344 async_schedule_domain(dapm_post_sequence_async, d,
1345 &async_domain);
1346 async_synchronize_full_domain(&async_domain);
1347
1348 pop_dbg(dapm->dev, card->pop_time,
1349 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1350 pop_wait(card->pop_time);
1351
1352 trace_snd_soc_dapm_done(card);
1353
1354 return 0;
1355 }
1356
1357 #ifdef CONFIG_DEBUG_FS
1358 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1359 {
1360 file->private_data = inode->i_private;
1361 return 0;
1362 }
1363
1364 static ssize_t dapm_widget_power_read_file(struct file *file,
1365 char __user *user_buf,
1366 size_t count, loff_t *ppos)
1367 {
1368 struct snd_soc_dapm_widget *w = file->private_data;
1369 char *buf;
1370 int in, out;
1371 ssize_t ret;
1372 struct snd_soc_dapm_path *p = NULL;
1373
1374 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1375 if (!buf)
1376 return -ENOMEM;
1377
1378 in = is_connected_input_ep(w);
1379 dapm_clear_walk(w->dapm);
1380 out = is_connected_output_ep(w);
1381 dapm_clear_walk(w->dapm);
1382
1383 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1384 w->name, w->power ? "On" : "Off", in, out);
1385
1386 if (w->reg >= 0)
1387 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1388 " - R%d(0x%x) bit %d",
1389 w->reg, w->reg, w->shift);
1390
1391 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1392
1393 if (w->sname)
1394 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1395 w->sname,
1396 w->active ? "active" : "inactive");
1397
1398 list_for_each_entry(p, &w->sources, list_sink) {
1399 if (p->connected && !p->connected(w, p->sink))
1400 continue;
1401
1402 if (p->connect)
1403 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1404 " in \"%s\" \"%s\"\n",
1405 p->name ? p->name : "static",
1406 p->source->name);
1407 }
1408 list_for_each_entry(p, &w->sinks, list_source) {
1409 if (p->connected && !p->connected(w, p->sink))
1410 continue;
1411
1412 if (p->connect)
1413 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1414 " out \"%s\" \"%s\"\n",
1415 p->name ? p->name : "static",
1416 p->sink->name);
1417 }
1418
1419 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1420
1421 kfree(buf);
1422 return ret;
1423 }
1424
1425 static const struct file_operations dapm_widget_power_fops = {
1426 .open = dapm_widget_power_open_file,
1427 .read = dapm_widget_power_read_file,
1428 .llseek = default_llseek,
1429 };
1430
1431 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1432 {
1433 file->private_data = inode->i_private;
1434 return 0;
1435 }
1436
1437 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1438 size_t count, loff_t *ppos)
1439 {
1440 struct snd_soc_dapm_context *dapm = file->private_data;
1441 char *level;
1442
1443 switch (dapm->bias_level) {
1444 case SND_SOC_BIAS_ON:
1445 level = "On\n";
1446 break;
1447 case SND_SOC_BIAS_PREPARE:
1448 level = "Prepare\n";
1449 break;
1450 case SND_SOC_BIAS_STANDBY:
1451 level = "Standby\n";
1452 break;
1453 case SND_SOC_BIAS_OFF:
1454 level = "Off\n";
1455 break;
1456 default:
1457 BUG();
1458 level = "Unknown\n";
1459 break;
1460 }
1461
1462 return simple_read_from_buffer(user_buf, count, ppos, level,
1463 strlen(level));
1464 }
1465
1466 static const struct file_operations dapm_bias_fops = {
1467 .open = dapm_bias_open_file,
1468 .read = dapm_bias_read_file,
1469 .llseek = default_llseek,
1470 };
1471
1472 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1473 struct dentry *parent)
1474 {
1475 struct dentry *d;
1476
1477 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1478
1479 if (!dapm->debugfs_dapm) {
1480 printk(KERN_WARNING
1481 "Failed to create DAPM debugfs directory\n");
1482 return;
1483 }
1484
1485 d = debugfs_create_file("bias_level", 0444,
1486 dapm->debugfs_dapm, dapm,
1487 &dapm_bias_fops);
1488 if (!d)
1489 dev_warn(dapm->dev,
1490 "ASoC: Failed to create bias level debugfs file\n");
1491 }
1492
1493 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1494 {
1495 struct snd_soc_dapm_context *dapm = w->dapm;
1496 struct dentry *d;
1497
1498 if (!dapm->debugfs_dapm || !w->name)
1499 return;
1500
1501 d = debugfs_create_file(w->name, 0444,
1502 dapm->debugfs_dapm, w,
1503 &dapm_widget_power_fops);
1504 if (!d)
1505 dev_warn(w->dapm->dev,
1506 "ASoC: Failed to create %s debugfs file\n",
1507 w->name);
1508 }
1509
1510 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1511 {
1512 debugfs_remove_recursive(dapm->debugfs_dapm);
1513 }
1514
1515 #else
1516 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1517 struct dentry *parent)
1518 {
1519 }
1520
1521 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1522 {
1523 }
1524
1525 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1526 {
1527 }
1528
1529 #endif
1530
1531 /* test and update the power status of a mux widget */
1532 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1533 struct snd_kcontrol *kcontrol, int change,
1534 int mux, struct soc_enum *e)
1535 {
1536 struct snd_soc_dapm_path *path;
1537 int found = 0;
1538
1539 if (widget->id != snd_soc_dapm_mux &&
1540 widget->id != snd_soc_dapm_virt_mux &&
1541 widget->id != snd_soc_dapm_value_mux)
1542 return -ENODEV;
1543
1544 if (!change)
1545 return 0;
1546
1547 /* find dapm widget path assoc with kcontrol */
1548 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1549 if (path->kcontrol != kcontrol)
1550 continue;
1551
1552 if (!path->name || !e->texts[mux])
1553 continue;
1554
1555 found = 1;
1556 /* we now need to match the string in the enum to the path */
1557 if (!(strcmp(path->name, e->texts[mux])))
1558 path->connect = 1; /* new connection */
1559 else
1560 path->connect = 0; /* old connection must be powered down */
1561 }
1562
1563 if (found)
1564 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1565
1566 return 0;
1567 }
1568
1569 /* test and update the power status of a mixer or switch widget */
1570 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1571 struct snd_kcontrol *kcontrol, int connect)
1572 {
1573 struct snd_soc_dapm_path *path;
1574 int found = 0;
1575
1576 if (widget->id != snd_soc_dapm_mixer &&
1577 widget->id != snd_soc_dapm_mixer_named_ctl &&
1578 widget->id != snd_soc_dapm_switch)
1579 return -ENODEV;
1580
1581 /* find dapm widget path assoc with kcontrol */
1582 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1583 if (path->kcontrol != kcontrol)
1584 continue;
1585
1586 /* found, now check type */
1587 found = 1;
1588 path->connect = connect;
1589 }
1590
1591 if (found)
1592 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1593
1594 return 0;
1595 }
1596
1597 /* show dapm widget status in sys fs */
1598 static ssize_t dapm_widget_show(struct device *dev,
1599 struct device_attribute *attr, char *buf)
1600 {
1601 struct snd_soc_pcm_runtime *rtd =
1602 container_of(dev, struct snd_soc_pcm_runtime, dev);
1603 struct snd_soc_codec *codec =rtd->codec;
1604 struct snd_soc_dapm_widget *w;
1605 int count = 0;
1606 char *state = "not set";
1607
1608 list_for_each_entry(w, &codec->card->widgets, list) {
1609 if (w->dapm != &codec->dapm)
1610 continue;
1611
1612 /* only display widgets that burnm power */
1613 switch (w->id) {
1614 case snd_soc_dapm_hp:
1615 case snd_soc_dapm_mic:
1616 case snd_soc_dapm_spk:
1617 case snd_soc_dapm_line:
1618 case snd_soc_dapm_micbias:
1619 case snd_soc_dapm_dac:
1620 case snd_soc_dapm_adc:
1621 case snd_soc_dapm_pga:
1622 case snd_soc_dapm_out_drv:
1623 case snd_soc_dapm_mixer:
1624 case snd_soc_dapm_mixer_named_ctl:
1625 case snd_soc_dapm_supply:
1626 if (w->name)
1627 count += sprintf(buf + count, "%s: %s\n",
1628 w->name, w->power ? "On":"Off");
1629 break;
1630 default:
1631 break;
1632 }
1633 }
1634
1635 switch (codec->dapm.bias_level) {
1636 case SND_SOC_BIAS_ON:
1637 state = "On";
1638 break;
1639 case SND_SOC_BIAS_PREPARE:
1640 state = "Prepare";
1641 break;
1642 case SND_SOC_BIAS_STANDBY:
1643 state = "Standby";
1644 break;
1645 case SND_SOC_BIAS_OFF:
1646 state = "Off";
1647 break;
1648 }
1649 count += sprintf(buf + count, "PM State: %s\n", state);
1650
1651 return count;
1652 }
1653
1654 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1655
1656 int snd_soc_dapm_sys_add(struct device *dev)
1657 {
1658 return device_create_file(dev, &dev_attr_dapm_widget);
1659 }
1660
1661 static void snd_soc_dapm_sys_remove(struct device *dev)
1662 {
1663 device_remove_file(dev, &dev_attr_dapm_widget);
1664 }
1665
1666 /* free all dapm widgets and resources */
1667 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1668 {
1669 struct snd_soc_dapm_widget *w, *next_w;
1670 struct snd_soc_dapm_path *p, *next_p;
1671
1672 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1673 if (w->dapm != dapm)
1674 continue;
1675 list_del(&w->list);
1676 /*
1677 * remove source and sink paths associated to this widget.
1678 * While removing the path, remove reference to it from both
1679 * source and sink widgets so that path is removed only once.
1680 */
1681 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1682 list_del(&p->list_sink);
1683 list_del(&p->list_source);
1684 list_del(&p->list);
1685 kfree(p->long_name);
1686 kfree(p);
1687 }
1688 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1689 list_del(&p->list_sink);
1690 list_del(&p->list_source);
1691 list_del(&p->list);
1692 kfree(p->long_name);
1693 kfree(p);
1694 }
1695 kfree(w->kcontrols);
1696 kfree(w->name);
1697 kfree(w);
1698 }
1699 }
1700
1701 static struct snd_soc_dapm_widget *dapm_find_widget(
1702 struct snd_soc_dapm_context *dapm, const char *pin,
1703 bool search_other_contexts)
1704 {
1705 struct snd_soc_dapm_widget *w;
1706 struct snd_soc_dapm_widget *fallback = NULL;
1707
1708 list_for_each_entry(w, &dapm->card->widgets, list) {
1709 if (!strcmp(w->name, pin)) {
1710 if (w->dapm == dapm)
1711 return w;
1712 else
1713 fallback = w;
1714 }
1715 }
1716
1717 if (search_other_contexts)
1718 return fallback;
1719
1720 return NULL;
1721 }
1722
1723 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1724 const char *pin, int status)
1725 {
1726 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1727
1728 if (!w) {
1729 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1730 return -EINVAL;
1731 }
1732
1733 w->connected = status;
1734 if (status == 0)
1735 w->force = 0;
1736
1737 return 0;
1738 }
1739
1740 /**
1741 * snd_soc_dapm_sync - scan and power dapm paths
1742 * @dapm: DAPM context
1743 *
1744 * Walks all dapm audio paths and powers widgets according to their
1745 * stream or path usage.
1746 *
1747 * Returns 0 for success.
1748 */
1749 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1750 {
1751 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1752 }
1753 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1754
1755 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1756 const struct snd_soc_dapm_route *route)
1757 {
1758 struct snd_soc_dapm_path *path;
1759 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1760 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1761 const char *sink;
1762 const char *control = route->control;
1763 const char *source;
1764 char prefixed_sink[80];
1765 char prefixed_source[80];
1766 int ret = 0;
1767
1768 if (dapm->codec && dapm->codec->name_prefix) {
1769 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1770 dapm->codec->name_prefix, route->sink);
1771 sink = prefixed_sink;
1772 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1773 dapm->codec->name_prefix, route->source);
1774 source = prefixed_source;
1775 } else {
1776 sink = route->sink;
1777 source = route->source;
1778 }
1779
1780 /*
1781 * find src and dest widgets over all widgets but favor a widget from
1782 * current DAPM context
1783 */
1784 list_for_each_entry(w, &dapm->card->widgets, list) {
1785 if (!wsink && !(strcmp(w->name, sink))) {
1786 wtsink = w;
1787 if (w->dapm == dapm)
1788 wsink = w;
1789 continue;
1790 }
1791 if (!wsource && !(strcmp(w->name, source))) {
1792 wtsource = w;
1793 if (w->dapm == dapm)
1794 wsource = w;
1795 }
1796 }
1797 /* use widget from another DAPM context if not found from this */
1798 if (!wsink)
1799 wsink = wtsink;
1800 if (!wsource)
1801 wsource = wtsource;
1802
1803 if (wsource == NULL || wsink == NULL)
1804 return -ENODEV;
1805
1806 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1807 if (!path)
1808 return -ENOMEM;
1809
1810 path->source = wsource;
1811 path->sink = wsink;
1812 path->connected = route->connected;
1813 INIT_LIST_HEAD(&path->list);
1814 INIT_LIST_HEAD(&path->list_source);
1815 INIT_LIST_HEAD(&path->list_sink);
1816
1817 /* check for external widgets */
1818 if (wsink->id == snd_soc_dapm_input) {
1819 if (wsource->id == snd_soc_dapm_micbias ||
1820 wsource->id == snd_soc_dapm_mic ||
1821 wsource->id == snd_soc_dapm_line ||
1822 wsource->id == snd_soc_dapm_output)
1823 wsink->ext = 1;
1824 }
1825 if (wsource->id == snd_soc_dapm_output) {
1826 if (wsink->id == snd_soc_dapm_spk ||
1827 wsink->id == snd_soc_dapm_hp ||
1828 wsink->id == snd_soc_dapm_line ||
1829 wsink->id == snd_soc_dapm_input)
1830 wsource->ext = 1;
1831 }
1832
1833 /* connect static paths */
1834 if (control == NULL) {
1835 list_add(&path->list, &dapm->card->paths);
1836 list_add(&path->list_sink, &wsink->sources);
1837 list_add(&path->list_source, &wsource->sinks);
1838 path->connect = 1;
1839 return 0;
1840 }
1841
1842 /* connect dynamic paths */
1843 switch (wsink->id) {
1844 case snd_soc_dapm_adc:
1845 case snd_soc_dapm_dac:
1846 case snd_soc_dapm_pga:
1847 case snd_soc_dapm_out_drv:
1848 case snd_soc_dapm_input:
1849 case snd_soc_dapm_output:
1850 case snd_soc_dapm_micbias:
1851 case snd_soc_dapm_vmid:
1852 case snd_soc_dapm_pre:
1853 case snd_soc_dapm_post:
1854 case snd_soc_dapm_supply:
1855 case snd_soc_dapm_aif_in:
1856 case snd_soc_dapm_aif_out:
1857 list_add(&path->list, &dapm->card->paths);
1858 list_add(&path->list_sink, &wsink->sources);
1859 list_add(&path->list_source, &wsource->sinks);
1860 path->connect = 1;
1861 return 0;
1862 case snd_soc_dapm_mux:
1863 case snd_soc_dapm_virt_mux:
1864 case snd_soc_dapm_value_mux:
1865 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1866 &wsink->kcontrol_news[0]);
1867 if (ret != 0)
1868 goto err;
1869 break;
1870 case snd_soc_dapm_switch:
1871 case snd_soc_dapm_mixer:
1872 case snd_soc_dapm_mixer_named_ctl:
1873 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1874 if (ret != 0)
1875 goto err;
1876 break;
1877 case snd_soc_dapm_hp:
1878 case snd_soc_dapm_mic:
1879 case snd_soc_dapm_line:
1880 case snd_soc_dapm_spk:
1881 list_add(&path->list, &dapm->card->paths);
1882 list_add(&path->list_sink, &wsink->sources);
1883 list_add(&path->list_source, &wsource->sinks);
1884 path->connect = 0;
1885 return 0;
1886 }
1887 return 0;
1888
1889 err:
1890 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1891 source, control, sink);
1892 kfree(path);
1893 return ret;
1894 }
1895
1896 /**
1897 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1898 * @dapm: DAPM context
1899 * @route: audio routes
1900 * @num: number of routes
1901 *
1902 * Connects 2 dapm widgets together via a named audio path. The sink is
1903 * the widget receiving the audio signal, whilst the source is the sender
1904 * of the audio signal.
1905 *
1906 * Returns 0 for success else error. On error all resources can be freed
1907 * with a call to snd_soc_card_free().
1908 */
1909 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1910 const struct snd_soc_dapm_route *route, int num)
1911 {
1912 int i, ret;
1913
1914 for (i = 0; i < num; i++) {
1915 ret = snd_soc_dapm_add_route(dapm, route);
1916 if (ret < 0) {
1917 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1918 route->source, route->sink);
1919 return ret;
1920 }
1921 route++;
1922 }
1923
1924 return 0;
1925 }
1926 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1927
1928 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
1929 const struct snd_soc_dapm_route *route)
1930 {
1931 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
1932 route->source,
1933 true);
1934 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
1935 route->sink,
1936 true);
1937 struct snd_soc_dapm_path *path;
1938 int count = 0;
1939
1940 if (!source) {
1941 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
1942 route->source);
1943 return -ENODEV;
1944 }
1945
1946 if (!sink) {
1947 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
1948 route->sink);
1949 return -ENODEV;
1950 }
1951
1952 if (route->control || route->connected)
1953 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
1954 route->source, route->sink);
1955
1956 list_for_each_entry(path, &source->sinks, list_source) {
1957 if (path->sink == sink) {
1958 path->weak = 1;
1959 count++;
1960 }
1961 }
1962
1963 if (count == 0)
1964 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
1965 route->source, route->sink);
1966 if (count > 1)
1967 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
1968 count, route->source, route->sink);
1969
1970 return 0;
1971 }
1972
1973 /**
1974 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
1975 * @dapm: DAPM context
1976 * @route: audio routes
1977 * @num: number of routes
1978 *
1979 * Mark existing routes matching those specified in the passed array
1980 * as being weak, meaning that they are ignored for the purpose of
1981 * power decisions. The main intended use case is for sidetone paths
1982 * which couple audio between other independent paths if they are both
1983 * active in order to make the combination work better at the user
1984 * level but which aren't intended to be "used".
1985 *
1986 * Note that CODEC drivers should not use this as sidetone type paths
1987 * can frequently also be used as bypass paths.
1988 */
1989 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
1990 const struct snd_soc_dapm_route *route, int num)
1991 {
1992 int i, err;
1993 int ret = 0;
1994
1995 for (i = 0; i < num; i++) {
1996 err = snd_soc_dapm_weak_route(dapm, route);
1997 if (err)
1998 ret = err;
1999 route++;
2000 }
2001
2002 return ret;
2003 }
2004 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2005
2006 /**
2007 * snd_soc_dapm_new_widgets - add new dapm widgets
2008 * @dapm: DAPM context
2009 *
2010 * Checks the codec for any new dapm widgets and creates them if found.
2011 *
2012 * Returns 0 for success.
2013 */
2014 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2015 {
2016 struct snd_soc_dapm_widget *w;
2017 unsigned int val;
2018
2019 list_for_each_entry(w, &dapm->card->widgets, list)
2020 {
2021 if (w->new)
2022 continue;
2023
2024 if (w->num_kcontrols) {
2025 w->kcontrols = kzalloc(w->num_kcontrols *
2026 sizeof(struct snd_kcontrol *),
2027 GFP_KERNEL);
2028 if (!w->kcontrols)
2029 return -ENOMEM;
2030 }
2031
2032 switch(w->id) {
2033 case snd_soc_dapm_switch:
2034 case snd_soc_dapm_mixer:
2035 case snd_soc_dapm_mixer_named_ctl:
2036 w->power_check = dapm_generic_check_power;
2037 dapm_new_mixer(w);
2038 break;
2039 case snd_soc_dapm_mux:
2040 case snd_soc_dapm_virt_mux:
2041 case snd_soc_dapm_value_mux:
2042 w->power_check = dapm_generic_check_power;
2043 dapm_new_mux(w);
2044 break;
2045 case snd_soc_dapm_adc:
2046 case snd_soc_dapm_aif_out:
2047 w->power_check = dapm_adc_check_power;
2048 break;
2049 case snd_soc_dapm_dac:
2050 case snd_soc_dapm_aif_in:
2051 w->power_check = dapm_dac_check_power;
2052 break;
2053 case snd_soc_dapm_pga:
2054 case snd_soc_dapm_out_drv:
2055 w->power_check = dapm_generic_check_power;
2056 dapm_new_pga(w);
2057 break;
2058 case snd_soc_dapm_input:
2059 case snd_soc_dapm_output:
2060 case snd_soc_dapm_micbias:
2061 case snd_soc_dapm_spk:
2062 case snd_soc_dapm_hp:
2063 case snd_soc_dapm_mic:
2064 case snd_soc_dapm_line:
2065 w->power_check = dapm_generic_check_power;
2066 break;
2067 case snd_soc_dapm_supply:
2068 w->power_check = dapm_supply_check_power;
2069 case snd_soc_dapm_vmid:
2070 case snd_soc_dapm_pre:
2071 case snd_soc_dapm_post:
2072 break;
2073 }
2074
2075 /* Read the initial power state from the device */
2076 if (w->reg >= 0) {
2077 val = soc_widget_read(w, w->reg);
2078 val &= 1 << w->shift;
2079 if (w->invert)
2080 val = !val;
2081
2082 if (val)
2083 w->power = 1;
2084 }
2085
2086 w->new = 1;
2087
2088 dapm_debugfs_add_widget(w);
2089 }
2090
2091 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2092 return 0;
2093 }
2094 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2095
2096 /**
2097 * snd_soc_dapm_get_volsw - dapm mixer get callback
2098 * @kcontrol: mixer control
2099 * @ucontrol: control element information
2100 *
2101 * Callback to get the value of a dapm mixer control.
2102 *
2103 * Returns 0 for success.
2104 */
2105 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2106 struct snd_ctl_elem_value *ucontrol)
2107 {
2108 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2109 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2110 struct soc_mixer_control *mc =
2111 (struct soc_mixer_control *)kcontrol->private_value;
2112 unsigned int reg = mc->reg;
2113 unsigned int shift = mc->shift;
2114 unsigned int rshift = mc->rshift;
2115 int max = mc->max;
2116 unsigned int invert = mc->invert;
2117 unsigned int mask = (1 << fls(max)) - 1;
2118
2119 ucontrol->value.integer.value[0] =
2120 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2121 if (shift != rshift)
2122 ucontrol->value.integer.value[1] =
2123 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2124 if (invert) {
2125 ucontrol->value.integer.value[0] =
2126 max - ucontrol->value.integer.value[0];
2127 if (shift != rshift)
2128 ucontrol->value.integer.value[1] =
2129 max - ucontrol->value.integer.value[1];
2130 }
2131
2132 return 0;
2133 }
2134 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2135
2136 /**
2137 * snd_soc_dapm_put_volsw - dapm mixer set callback
2138 * @kcontrol: mixer control
2139 * @ucontrol: control element information
2140 *
2141 * Callback to set the value of a dapm mixer control.
2142 *
2143 * Returns 0 for success.
2144 */
2145 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2146 struct snd_ctl_elem_value *ucontrol)
2147 {
2148 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2149 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2150 struct snd_soc_codec *codec = widget->codec;
2151 struct soc_mixer_control *mc =
2152 (struct soc_mixer_control *)kcontrol->private_value;
2153 unsigned int reg = mc->reg;
2154 unsigned int shift = mc->shift;
2155 int max = mc->max;
2156 unsigned int mask = (1 << fls(max)) - 1;
2157 unsigned int invert = mc->invert;
2158 unsigned int val;
2159 int connect, change;
2160 struct snd_soc_dapm_update update;
2161 int wi;
2162
2163 val = (ucontrol->value.integer.value[0] & mask);
2164
2165 if (invert)
2166 val = max - val;
2167 mask = mask << shift;
2168 val = val << shift;
2169
2170 if (val)
2171 /* new connection */
2172 connect = invert ? 0 : 1;
2173 else
2174 /* old connection must be powered down */
2175 connect = invert ? 1 : 0;
2176
2177 mutex_lock(&codec->mutex);
2178
2179 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2180 if (change) {
2181 for (wi = 0; wi < wlist->num_widgets; wi++) {
2182 widget = wlist->widgets[wi];
2183
2184 widget->value = val;
2185
2186 update.kcontrol = kcontrol;
2187 update.widget = widget;
2188 update.reg = reg;
2189 update.mask = mask;
2190 update.val = val;
2191 widget->dapm->update = &update;
2192
2193 dapm_mixer_update_power(widget, kcontrol, connect);
2194
2195 widget->dapm->update = NULL;
2196 }
2197 }
2198
2199 mutex_unlock(&codec->mutex);
2200 return 0;
2201 }
2202 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2203
2204 /**
2205 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2206 * @kcontrol: mixer control
2207 * @ucontrol: control element information
2208 *
2209 * Callback to get the value of a dapm enumerated double mixer control.
2210 *
2211 * Returns 0 for success.
2212 */
2213 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2214 struct snd_ctl_elem_value *ucontrol)
2215 {
2216 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2217 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2218 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2219 unsigned int val, bitmask;
2220
2221 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2222 ;
2223 val = snd_soc_read(widget->codec, e->reg);
2224 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2225 if (e->shift_l != e->shift_r)
2226 ucontrol->value.enumerated.item[1] =
2227 (val >> e->shift_r) & (bitmask - 1);
2228
2229 return 0;
2230 }
2231 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2232
2233 /**
2234 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2235 * @kcontrol: mixer control
2236 * @ucontrol: control element information
2237 *
2238 * Callback to set the value of a dapm enumerated double mixer control.
2239 *
2240 * Returns 0 for success.
2241 */
2242 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2243 struct snd_ctl_elem_value *ucontrol)
2244 {
2245 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2246 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2247 struct snd_soc_codec *codec = widget->codec;
2248 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2249 unsigned int val, mux, change;
2250 unsigned int mask, bitmask;
2251 struct snd_soc_dapm_update update;
2252 int wi;
2253
2254 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2255 ;
2256 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2257 return -EINVAL;
2258 mux = ucontrol->value.enumerated.item[0];
2259 val = mux << e->shift_l;
2260 mask = (bitmask - 1) << e->shift_l;
2261 if (e->shift_l != e->shift_r) {
2262 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2263 return -EINVAL;
2264 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2265 mask |= (bitmask - 1) << e->shift_r;
2266 }
2267
2268 mutex_lock(&codec->mutex);
2269
2270 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2271 if (change) {
2272 for (wi = 0; wi < wlist->num_widgets; wi++) {
2273 widget = wlist->widgets[wi];
2274
2275 widget->value = val;
2276
2277 update.kcontrol = kcontrol;
2278 update.widget = widget;
2279 update.reg = e->reg;
2280 update.mask = mask;
2281 update.val = val;
2282 widget->dapm->update = &update;
2283
2284 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2285
2286 widget->dapm->update = NULL;
2287 }
2288 }
2289
2290 mutex_unlock(&codec->mutex);
2291 return change;
2292 }
2293 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2294
2295 /**
2296 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2297 * @kcontrol: mixer control
2298 * @ucontrol: control element information
2299 *
2300 * Returns 0 for success.
2301 */
2302 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2303 struct snd_ctl_elem_value *ucontrol)
2304 {
2305 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2306 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2307
2308 ucontrol->value.enumerated.item[0] = widget->value;
2309
2310 return 0;
2311 }
2312 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2313
2314 /**
2315 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2316 * @kcontrol: mixer control
2317 * @ucontrol: control element information
2318 *
2319 * Returns 0 for success.
2320 */
2321 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2322 struct snd_ctl_elem_value *ucontrol)
2323 {
2324 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2325 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2326 struct snd_soc_codec *codec = widget->codec;
2327 struct soc_enum *e =
2328 (struct soc_enum *)kcontrol->private_value;
2329 int change;
2330 int ret = 0;
2331 int wi;
2332
2333 if (ucontrol->value.enumerated.item[0] >= e->max)
2334 return -EINVAL;
2335
2336 mutex_lock(&codec->mutex);
2337
2338 change = widget->value != ucontrol->value.enumerated.item[0];
2339 if (change) {
2340 for (wi = 0; wi < wlist->num_widgets; wi++) {
2341 widget = wlist->widgets[wi];
2342
2343 widget->value = ucontrol->value.enumerated.item[0];
2344
2345 dapm_mux_update_power(widget, kcontrol, change,
2346 widget->value, e);
2347 }
2348 }
2349
2350 mutex_unlock(&codec->mutex);
2351 return ret;
2352 }
2353 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2354
2355 /**
2356 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2357 * callback
2358 * @kcontrol: mixer control
2359 * @ucontrol: control element information
2360 *
2361 * Callback to get the value of a dapm semi enumerated double mixer control.
2362 *
2363 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2364 * used for handling bitfield coded enumeration for example.
2365 *
2366 * Returns 0 for success.
2367 */
2368 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2369 struct snd_ctl_elem_value *ucontrol)
2370 {
2371 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2372 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2373 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2374 unsigned int reg_val, val, mux;
2375
2376 reg_val = snd_soc_read(widget->codec, e->reg);
2377 val = (reg_val >> e->shift_l) & e->mask;
2378 for (mux = 0; mux < e->max; mux++) {
2379 if (val == e->values[mux])
2380 break;
2381 }
2382 ucontrol->value.enumerated.item[0] = mux;
2383 if (e->shift_l != e->shift_r) {
2384 val = (reg_val >> e->shift_r) & e->mask;
2385 for (mux = 0; mux < e->max; mux++) {
2386 if (val == e->values[mux])
2387 break;
2388 }
2389 ucontrol->value.enumerated.item[1] = mux;
2390 }
2391
2392 return 0;
2393 }
2394 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2395
2396 /**
2397 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2398 * callback
2399 * @kcontrol: mixer control
2400 * @ucontrol: control element information
2401 *
2402 * Callback to set the value of a dapm semi enumerated double mixer control.
2403 *
2404 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2405 * used for handling bitfield coded enumeration for example.
2406 *
2407 * Returns 0 for success.
2408 */
2409 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2410 struct snd_ctl_elem_value *ucontrol)
2411 {
2412 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2413 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2414 struct snd_soc_codec *codec = widget->codec;
2415 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2416 unsigned int val, mux, change;
2417 unsigned int mask;
2418 struct snd_soc_dapm_update update;
2419 int wi;
2420
2421 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2422 return -EINVAL;
2423 mux = ucontrol->value.enumerated.item[0];
2424 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2425 mask = e->mask << e->shift_l;
2426 if (e->shift_l != e->shift_r) {
2427 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2428 return -EINVAL;
2429 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2430 mask |= e->mask << e->shift_r;
2431 }
2432
2433 mutex_lock(&codec->mutex);
2434
2435 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2436 if (change) {
2437 for (wi = 0; wi < wlist->num_widgets; wi++) {
2438 widget = wlist->widgets[wi];
2439
2440 widget->value = val;
2441
2442 update.kcontrol = kcontrol;
2443 update.widget = widget;
2444 update.reg = e->reg;
2445 update.mask = mask;
2446 update.val = val;
2447 widget->dapm->update = &update;
2448
2449 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2450
2451 widget->dapm->update = NULL;
2452 }
2453 }
2454
2455 mutex_unlock(&codec->mutex);
2456 return change;
2457 }
2458 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2459
2460 /**
2461 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2462 *
2463 * @kcontrol: mixer control
2464 * @uinfo: control element information
2465 *
2466 * Callback to provide information about a pin switch control.
2467 */
2468 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2469 struct snd_ctl_elem_info *uinfo)
2470 {
2471 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2472 uinfo->count = 1;
2473 uinfo->value.integer.min = 0;
2474 uinfo->value.integer.max = 1;
2475
2476 return 0;
2477 }
2478 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2479
2480 /**
2481 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2482 *
2483 * @kcontrol: mixer control
2484 * @ucontrol: Value
2485 */
2486 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2487 struct snd_ctl_elem_value *ucontrol)
2488 {
2489 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2490 const char *pin = (const char *)kcontrol->private_value;
2491
2492 mutex_lock(&codec->mutex);
2493
2494 ucontrol->value.integer.value[0] =
2495 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2496
2497 mutex_unlock(&codec->mutex);
2498
2499 return 0;
2500 }
2501 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2502
2503 /**
2504 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2505 *
2506 * @kcontrol: mixer control
2507 * @ucontrol: Value
2508 */
2509 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2510 struct snd_ctl_elem_value *ucontrol)
2511 {
2512 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2513 const char *pin = (const char *)kcontrol->private_value;
2514
2515 mutex_lock(&codec->mutex);
2516
2517 if (ucontrol->value.integer.value[0])
2518 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2519 else
2520 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2521
2522 snd_soc_dapm_sync(&codec->dapm);
2523
2524 mutex_unlock(&codec->mutex);
2525
2526 return 0;
2527 }
2528 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2529
2530 /**
2531 * snd_soc_dapm_new_control - create new dapm control
2532 * @dapm: DAPM context
2533 * @widget: widget template
2534 *
2535 * Creates a new dapm control based upon the template.
2536 *
2537 * Returns 0 for success else error.
2538 */
2539 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2540 const struct snd_soc_dapm_widget *widget)
2541 {
2542 struct snd_soc_dapm_widget *w;
2543 size_t name_len;
2544
2545 if ((w = dapm_cnew_widget(widget)) == NULL)
2546 return -ENOMEM;
2547
2548 name_len = strlen(widget->name) + 1;
2549 if (dapm->codec && dapm->codec->name_prefix)
2550 name_len += 1 + strlen(dapm->codec->name_prefix);
2551 w->name = kmalloc(name_len, GFP_KERNEL);
2552 if (w->name == NULL) {
2553 kfree(w);
2554 return -ENOMEM;
2555 }
2556 if (dapm->codec && dapm->codec->name_prefix)
2557 snprintf(w->name, name_len, "%s %s",
2558 dapm->codec->name_prefix, widget->name);
2559 else
2560 snprintf(w->name, name_len, "%s", widget->name);
2561
2562 dapm->n_widgets++;
2563 w->dapm = dapm;
2564 w->codec = dapm->codec;
2565 w->platform = dapm->platform;
2566 INIT_LIST_HEAD(&w->sources);
2567 INIT_LIST_HEAD(&w->sinks);
2568 INIT_LIST_HEAD(&w->list);
2569 list_add(&w->list, &dapm->card->widgets);
2570
2571 /* machine layer set ups unconnected pins and insertions */
2572 w->connected = 1;
2573 return 0;
2574 }
2575 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2576
2577 /**
2578 * snd_soc_dapm_new_controls - create new dapm controls
2579 * @dapm: DAPM context
2580 * @widget: widget array
2581 * @num: number of widgets
2582 *
2583 * Creates new DAPM controls based upon the templates.
2584 *
2585 * Returns 0 for success else error.
2586 */
2587 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2588 const struct snd_soc_dapm_widget *widget,
2589 int num)
2590 {
2591 int i, ret;
2592
2593 for (i = 0; i < num; i++) {
2594 ret = snd_soc_dapm_new_control(dapm, widget);
2595 if (ret < 0) {
2596 dev_err(dapm->dev,
2597 "ASoC: Failed to create DAPM control %s: %d\n",
2598 widget->name, ret);
2599 return ret;
2600 }
2601 widget++;
2602 }
2603 return 0;
2604 }
2605 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2606
2607 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2608 const char *stream, int event)
2609 {
2610 struct snd_soc_dapm_widget *w;
2611
2612 list_for_each_entry(w, &dapm->card->widgets, list)
2613 {
2614 if (!w->sname || w->dapm != dapm)
2615 continue;
2616 dev_vdbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2617 w->name, w->sname, stream, event);
2618 if (strstr(w->sname, stream)) {
2619 switch(event) {
2620 case SND_SOC_DAPM_STREAM_START:
2621 w->active = 1;
2622 break;
2623 case SND_SOC_DAPM_STREAM_STOP:
2624 w->active = 0;
2625 break;
2626 case SND_SOC_DAPM_STREAM_SUSPEND:
2627 case SND_SOC_DAPM_STREAM_RESUME:
2628 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2629 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2630 break;
2631 }
2632 }
2633 }
2634
2635 dapm_power_widgets(dapm, event);
2636
2637 /* do we need to notify any clients that DAPM stream is complete */
2638 if (dapm->stream_event)
2639 dapm->stream_event(dapm, event);
2640 }
2641
2642 /**
2643 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2644 * @rtd: PCM runtime data
2645 * @stream: stream name
2646 * @event: stream event
2647 *
2648 * Sends a stream event to the dapm core. The core then makes any
2649 * necessary widget power changes.
2650 *
2651 * Returns 0 for success else error.
2652 */
2653 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2654 const char *stream, int event)
2655 {
2656 struct snd_soc_codec *codec = rtd->codec;
2657
2658 if (stream == NULL)
2659 return 0;
2660
2661 mutex_lock(&codec->mutex);
2662 soc_dapm_stream_event(&codec->dapm, stream, event);
2663 mutex_unlock(&codec->mutex);
2664 return 0;
2665 }
2666
2667 /**
2668 * snd_soc_dapm_enable_pin - enable pin.
2669 * @dapm: DAPM context
2670 * @pin: pin name
2671 *
2672 * Enables input/output pin and its parents or children widgets iff there is
2673 * a valid audio route and active audio stream.
2674 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2675 * do any widget power switching.
2676 */
2677 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2678 {
2679 return snd_soc_dapm_set_pin(dapm, pin, 1);
2680 }
2681 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2682
2683 /**
2684 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2685 * @dapm: DAPM context
2686 * @pin: pin name
2687 *
2688 * Enables input/output pin regardless of any other state. This is
2689 * intended for use with microphone bias supplies used in microphone
2690 * jack detection.
2691 *
2692 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2693 * do any widget power switching.
2694 */
2695 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2696 const char *pin)
2697 {
2698 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2699
2700 if (!w) {
2701 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2702 return -EINVAL;
2703 }
2704
2705 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2706 w->connected = 1;
2707 w->force = 1;
2708
2709 return 0;
2710 }
2711 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2712
2713 /**
2714 * snd_soc_dapm_disable_pin - disable pin.
2715 * @dapm: DAPM context
2716 * @pin: pin name
2717 *
2718 * Disables input/output pin and its parents or children widgets.
2719 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2720 * do any widget power switching.
2721 */
2722 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2723 const char *pin)
2724 {
2725 return snd_soc_dapm_set_pin(dapm, pin, 0);
2726 }
2727 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2728
2729 /**
2730 * snd_soc_dapm_nc_pin - permanently disable pin.
2731 * @dapm: DAPM context
2732 * @pin: pin name
2733 *
2734 * Marks the specified pin as being not connected, disabling it along
2735 * any parent or child widgets. At present this is identical to
2736 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2737 * additional things such as disabling controls which only affect
2738 * paths through the pin.
2739 *
2740 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2741 * do any widget power switching.
2742 */
2743 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2744 {
2745 return snd_soc_dapm_set_pin(dapm, pin, 0);
2746 }
2747 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2748
2749 /**
2750 * snd_soc_dapm_get_pin_status - get audio pin status
2751 * @dapm: DAPM context
2752 * @pin: audio signal pin endpoint (or start point)
2753 *
2754 * Get audio pin status - connected or disconnected.
2755 *
2756 * Returns 1 for connected otherwise 0.
2757 */
2758 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2759 const char *pin)
2760 {
2761 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2762
2763 if (w)
2764 return w->connected;
2765
2766 return 0;
2767 }
2768 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2769
2770 /**
2771 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2772 * @dapm: DAPM context
2773 * @pin: audio signal pin endpoint (or start point)
2774 *
2775 * Mark the given endpoint or pin as ignoring suspend. When the
2776 * system is disabled a path between two endpoints flagged as ignoring
2777 * suspend will not be disabled. The path must already be enabled via
2778 * normal means at suspend time, it will not be turned on if it was not
2779 * already enabled.
2780 */
2781 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2782 const char *pin)
2783 {
2784 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2785
2786 if (!w) {
2787 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2788 return -EINVAL;
2789 }
2790
2791 w->ignore_suspend = 1;
2792
2793 return 0;
2794 }
2795 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2796
2797 /**
2798 * snd_soc_dapm_free - free dapm resources
2799 * @dapm: DAPM context
2800 *
2801 * Free all dapm widgets and resources.
2802 */
2803 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2804 {
2805 snd_soc_dapm_sys_remove(dapm->dev);
2806 dapm_debugfs_cleanup(dapm);
2807 dapm_free_widgets(dapm);
2808 list_del(&dapm->list);
2809 }
2810 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2811
2812 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2813 {
2814 struct snd_soc_dapm_widget *w;
2815 LIST_HEAD(down_list);
2816 int powerdown = 0;
2817
2818 list_for_each_entry(w, &dapm->card->widgets, list) {
2819 if (w->dapm != dapm)
2820 continue;
2821 if (w->power) {
2822 dapm_seq_insert(w, &down_list, false);
2823 w->power = 0;
2824 powerdown = 1;
2825 }
2826 }
2827
2828 /* If there were no widgets to power down we're already in
2829 * standby.
2830 */
2831 if (powerdown) {
2832 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
2833 dapm_seq_run(dapm, &down_list, 0, false);
2834 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
2835 }
2836 }
2837
2838 /*
2839 * snd_soc_dapm_shutdown - callback for system shutdown
2840 */
2841 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2842 {
2843 struct snd_soc_codec *codec;
2844
2845 list_for_each_entry(codec, &card->codec_dev_list, list) {
2846 soc_dapm_shutdown_codec(&codec->dapm);
2847 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
2848 }
2849 }
2850
2851 /* Module information */
2852 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2853 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2854 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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