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ASoC: wm9712: Remove driver specific version
[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/pm_runtime.h>
43 #include <linux/regulator/consumer.h>
44 #include <linux/slab.h>
45 #include <sound/core.h>
46 #include <sound/pcm.h>
47 #include <sound/pcm_params.h>
48 #include <sound/soc.h>
49 #include <sound/initval.h>
50
51 #include <trace/events/asoc.h>
52
53 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
54
55 /* dapm power sequences - make this per codec in the future */
56 static int dapm_up_seq[] = {
57 [snd_soc_dapm_pre] = 0,
58 [snd_soc_dapm_supply] = 1,
59 [snd_soc_dapm_regulator_supply] = 1,
60 [snd_soc_dapm_micbias] = 2,
61 [snd_soc_dapm_aif_in] = 3,
62 [snd_soc_dapm_aif_out] = 3,
63 [snd_soc_dapm_mic] = 4,
64 [snd_soc_dapm_mux] = 5,
65 [snd_soc_dapm_virt_mux] = 5,
66 [snd_soc_dapm_value_mux] = 5,
67 [snd_soc_dapm_dac] = 6,
68 [snd_soc_dapm_mixer] = 7,
69 [snd_soc_dapm_mixer_named_ctl] = 7,
70 [snd_soc_dapm_pga] = 8,
71 [snd_soc_dapm_adc] = 9,
72 [snd_soc_dapm_out_drv] = 10,
73 [snd_soc_dapm_hp] = 10,
74 [snd_soc_dapm_spk] = 10,
75 [snd_soc_dapm_post] = 11,
76 };
77
78 static int dapm_down_seq[] = {
79 [snd_soc_dapm_pre] = 0,
80 [snd_soc_dapm_adc] = 1,
81 [snd_soc_dapm_hp] = 2,
82 [snd_soc_dapm_spk] = 2,
83 [snd_soc_dapm_out_drv] = 2,
84 [snd_soc_dapm_pga] = 4,
85 [snd_soc_dapm_mixer_named_ctl] = 5,
86 [snd_soc_dapm_mixer] = 5,
87 [snd_soc_dapm_dac] = 6,
88 [snd_soc_dapm_mic] = 7,
89 [snd_soc_dapm_micbias] = 8,
90 [snd_soc_dapm_mux] = 9,
91 [snd_soc_dapm_virt_mux] = 9,
92 [snd_soc_dapm_value_mux] = 9,
93 [snd_soc_dapm_aif_in] = 10,
94 [snd_soc_dapm_aif_out] = 10,
95 [snd_soc_dapm_regulator_supply] = 11,
96 [snd_soc_dapm_supply] = 11,
97 [snd_soc_dapm_post] = 12,
98 };
99
100 static void pop_wait(u32 pop_time)
101 {
102 if (pop_time)
103 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
104 }
105
106 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
107 {
108 va_list args;
109 char *buf;
110
111 if (!pop_time)
112 return;
113
114 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
115 if (buf == NULL)
116 return;
117
118 va_start(args, fmt);
119 vsnprintf(buf, PAGE_SIZE, fmt, args);
120 dev_info(dev, "%s", buf);
121 va_end(args);
122
123 kfree(buf);
124 }
125
126 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
127 {
128 return !list_empty(&w->dirty);
129 }
130
131 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
132 {
133 if (!dapm_dirty_widget(w)) {
134 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
135 w->name, reason);
136 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
137 }
138 }
139 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
140
141 /* create a new dapm widget */
142 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
143 const struct snd_soc_dapm_widget *_widget)
144 {
145 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
146 }
147
148 /* get snd_card from DAPM context */
149 static inline struct snd_card *dapm_get_snd_card(
150 struct snd_soc_dapm_context *dapm)
151 {
152 if (dapm->codec)
153 return dapm->codec->card->snd_card;
154 else if (dapm->platform)
155 return dapm->platform->card->snd_card;
156 else
157 BUG();
158
159 /* unreachable */
160 return NULL;
161 }
162
163 /* get soc_card from DAPM context */
164 static inline struct snd_soc_card *dapm_get_soc_card(
165 struct snd_soc_dapm_context *dapm)
166 {
167 if (dapm->codec)
168 return dapm->codec->card;
169 else if (dapm->platform)
170 return dapm->platform->card;
171 else
172 BUG();
173
174 /* unreachable */
175 return NULL;
176 }
177
178 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
179 {
180 if (w->codec)
181 return snd_soc_read(w->codec, reg);
182 else if (w->platform)
183 return snd_soc_platform_read(w->platform, reg);
184
185 dev_err(w->dapm->dev, "no valid widget read method\n");
186 return -1;
187 }
188
189 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
190 {
191 if (w->codec)
192 return snd_soc_write(w->codec, reg, val);
193 else if (w->platform)
194 return snd_soc_platform_write(w->platform, reg, val);
195
196 dev_err(w->dapm->dev, "no valid widget write method\n");
197 return -1;
198 }
199
200 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
201 unsigned short reg, unsigned int mask, unsigned int value)
202 {
203 bool change;
204 unsigned int old, new;
205 int ret;
206
207 if (w->codec && w->codec->using_regmap) {
208 ret = regmap_update_bits_check(w->codec->control_data,
209 reg, mask, value, &change);
210 if (ret != 0)
211 return ret;
212 } else {
213 ret = soc_widget_read(w, reg);
214 if (ret < 0)
215 return ret;
216
217 old = ret;
218 new = (old & ~mask) | (value & mask);
219 change = old != new;
220 if (change) {
221 ret = soc_widget_write(w, reg, new);
222 if (ret < 0)
223 return ret;
224 }
225 }
226
227 return change;
228 }
229
230 /**
231 * snd_soc_dapm_set_bias_level - set the bias level for the system
232 * @dapm: DAPM context
233 * @level: level to configure
234 *
235 * Configure the bias (power) levels for the SoC audio device.
236 *
237 * Returns 0 for success else error.
238 */
239 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
240 enum snd_soc_bias_level level)
241 {
242 struct snd_soc_card *card = dapm->card;
243 int ret = 0;
244
245 trace_snd_soc_bias_level_start(card, level);
246
247 if (card && card->set_bias_level)
248 ret = card->set_bias_level(card, dapm, level);
249 if (ret != 0)
250 goto out;
251
252 if (dapm->codec) {
253 if (dapm->codec->driver->set_bias_level)
254 ret = dapm->codec->driver->set_bias_level(dapm->codec,
255 level);
256 else
257 dapm->bias_level = level;
258 }
259 if (ret != 0)
260 goto out;
261
262 if (card && card->set_bias_level_post)
263 ret = card->set_bias_level_post(card, dapm, level);
264 out:
265 trace_snd_soc_bias_level_done(card, level);
266
267 return ret;
268 }
269
270 /* set up initial codec paths */
271 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
272 struct snd_soc_dapm_path *p, int i)
273 {
274 switch (w->id) {
275 case snd_soc_dapm_switch:
276 case snd_soc_dapm_mixer:
277 case snd_soc_dapm_mixer_named_ctl: {
278 int val;
279 struct soc_mixer_control *mc = (struct soc_mixer_control *)
280 w->kcontrol_news[i].private_value;
281 unsigned int reg = mc->reg;
282 unsigned int shift = mc->shift;
283 int max = mc->max;
284 unsigned int mask = (1 << fls(max)) - 1;
285 unsigned int invert = mc->invert;
286
287 val = soc_widget_read(w, reg);
288 val = (val >> shift) & mask;
289
290 if ((invert && !val) || (!invert && val))
291 p->connect = 1;
292 else
293 p->connect = 0;
294 }
295 break;
296 case snd_soc_dapm_mux: {
297 struct soc_enum *e = (struct soc_enum *)
298 w->kcontrol_news[i].private_value;
299 int val, item, bitmask;
300
301 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
302 ;
303 val = soc_widget_read(w, e->reg);
304 item = (val >> e->shift_l) & (bitmask - 1);
305
306 p->connect = 0;
307 for (i = 0; i < e->max; i++) {
308 if (!(strcmp(p->name, e->texts[i])) && item == i)
309 p->connect = 1;
310 }
311 }
312 break;
313 case snd_soc_dapm_virt_mux: {
314 struct soc_enum *e = (struct soc_enum *)
315 w->kcontrol_news[i].private_value;
316
317 p->connect = 0;
318 /* since a virtual mux has no backing registers to
319 * decide which path to connect, it will try to match
320 * with the first enumeration. This is to ensure
321 * that the default mux choice (the first) will be
322 * correctly powered up during initialization.
323 */
324 if (!strcmp(p->name, e->texts[0]))
325 p->connect = 1;
326 }
327 break;
328 case snd_soc_dapm_value_mux: {
329 struct soc_enum *e = (struct soc_enum *)
330 w->kcontrol_news[i].private_value;
331 int val, item;
332
333 val = soc_widget_read(w, e->reg);
334 val = (val >> e->shift_l) & e->mask;
335 for (item = 0; item < e->max; item++) {
336 if (val == e->values[item])
337 break;
338 }
339
340 p->connect = 0;
341 for (i = 0; i < e->max; i++) {
342 if (!(strcmp(p->name, e->texts[i])) && item == i)
343 p->connect = 1;
344 }
345 }
346 break;
347 /* does not affect routing - always connected */
348 case snd_soc_dapm_pga:
349 case snd_soc_dapm_out_drv:
350 case snd_soc_dapm_output:
351 case snd_soc_dapm_adc:
352 case snd_soc_dapm_input:
353 case snd_soc_dapm_siggen:
354 case snd_soc_dapm_dac:
355 case snd_soc_dapm_micbias:
356 case snd_soc_dapm_vmid:
357 case snd_soc_dapm_supply:
358 case snd_soc_dapm_regulator_supply:
359 case snd_soc_dapm_aif_in:
360 case snd_soc_dapm_aif_out:
361 case snd_soc_dapm_hp:
362 case snd_soc_dapm_mic:
363 case snd_soc_dapm_spk:
364 case snd_soc_dapm_line:
365 p->connect = 1;
366 break;
367 /* does affect routing - dynamically connected */
368 case snd_soc_dapm_pre:
369 case snd_soc_dapm_post:
370 p->connect = 0;
371 break;
372 }
373 }
374
375 /* connect mux widget to its interconnecting audio paths */
376 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
377 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
378 struct snd_soc_dapm_path *path, const char *control_name,
379 const struct snd_kcontrol_new *kcontrol)
380 {
381 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
382 int i;
383
384 for (i = 0; i < e->max; i++) {
385 if (!(strcmp(control_name, e->texts[i]))) {
386 list_add(&path->list, &dapm->card->paths);
387 list_add(&path->list_sink, &dest->sources);
388 list_add(&path->list_source, &src->sinks);
389 path->name = (char*)e->texts[i];
390 dapm_set_path_status(dest, path, 0);
391 return 0;
392 }
393 }
394
395 return -ENODEV;
396 }
397
398 /* connect mixer widget to its interconnecting audio paths */
399 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
400 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
401 struct snd_soc_dapm_path *path, const char *control_name)
402 {
403 int i;
404
405 /* search for mixer kcontrol */
406 for (i = 0; i < dest->num_kcontrols; i++) {
407 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
408 list_add(&path->list, &dapm->card->paths);
409 list_add(&path->list_sink, &dest->sources);
410 list_add(&path->list_source, &src->sinks);
411 path->name = dest->kcontrol_news[i].name;
412 dapm_set_path_status(dest, path, i);
413 return 0;
414 }
415 }
416 return -ENODEV;
417 }
418
419 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
420 struct snd_soc_dapm_widget *kcontrolw,
421 const struct snd_kcontrol_new *kcontrol_new,
422 struct snd_kcontrol **kcontrol)
423 {
424 struct snd_soc_dapm_widget *w;
425 int i;
426
427 *kcontrol = NULL;
428
429 list_for_each_entry(w, &dapm->card->widgets, list) {
430 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
431 continue;
432 for (i = 0; i < w->num_kcontrols; i++) {
433 if (&w->kcontrol_news[i] == kcontrol_new) {
434 if (w->kcontrols)
435 *kcontrol = w->kcontrols[i];
436 return 1;
437 }
438 }
439 }
440
441 return 0;
442 }
443
444 /* create new dapm mixer control */
445 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
446 {
447 struct snd_soc_dapm_context *dapm = w->dapm;
448 int i, ret = 0;
449 size_t name_len, prefix_len;
450 struct snd_soc_dapm_path *path;
451 struct snd_card *card = dapm->card->snd_card;
452 const char *prefix;
453 struct snd_soc_dapm_widget_list *wlist;
454 size_t wlistsize;
455
456 if (dapm->codec)
457 prefix = dapm->codec->name_prefix;
458 else
459 prefix = NULL;
460
461 if (prefix)
462 prefix_len = strlen(prefix) + 1;
463 else
464 prefix_len = 0;
465
466 /* add kcontrol */
467 for (i = 0; i < w->num_kcontrols; i++) {
468
469 /* match name */
470 list_for_each_entry(path, &w->sources, list_sink) {
471
472 /* mixer/mux paths name must match control name */
473 if (path->name != (char *)w->kcontrol_news[i].name)
474 continue;
475
476 if (w->kcontrols[i]) {
477 path->kcontrol = w->kcontrols[i];
478 continue;
479 }
480
481 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
482 sizeof(struct snd_soc_dapm_widget *),
483 wlist = kzalloc(wlistsize, GFP_KERNEL);
484 if (wlist == NULL) {
485 dev_err(dapm->dev,
486 "asoc: can't allocate widget list for %s\n",
487 w->name);
488 return -ENOMEM;
489 }
490 wlist->num_widgets = 1;
491 wlist->widgets[0] = w;
492
493 /* add dapm control with long name.
494 * for dapm_mixer this is the concatenation of the
495 * mixer and kcontrol name.
496 * for dapm_mixer_named_ctl this is simply the
497 * kcontrol name.
498 */
499 name_len = strlen(w->kcontrol_news[i].name) + 1;
500 if (w->id != snd_soc_dapm_mixer_named_ctl)
501 name_len += 1 + strlen(w->name);
502
503 path->long_name = kmalloc(name_len, GFP_KERNEL);
504
505 if (path->long_name == NULL) {
506 kfree(wlist);
507 return -ENOMEM;
508 }
509
510 switch (w->id) {
511 default:
512 /* The control will get a prefix from
513 * the control creation process but
514 * we're also using the same prefix
515 * for widgets so cut the prefix off
516 * the front of the widget name.
517 */
518 snprintf(path->long_name, name_len, "%s %s",
519 w->name + prefix_len,
520 w->kcontrol_news[i].name);
521 break;
522 case snd_soc_dapm_mixer_named_ctl:
523 snprintf(path->long_name, name_len, "%s",
524 w->kcontrol_news[i].name);
525 break;
526 }
527
528 path->long_name[name_len - 1] = '\0';
529
530 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
531 wlist, path->long_name,
532 prefix);
533 ret = snd_ctl_add(card, path->kcontrol);
534 if (ret < 0) {
535 dev_err(dapm->dev,
536 "asoc: failed to add dapm kcontrol %s: %d\n",
537 path->long_name, ret);
538 kfree(wlist);
539 kfree(path->long_name);
540 path->long_name = NULL;
541 return ret;
542 }
543 w->kcontrols[i] = path->kcontrol;
544 }
545 }
546 return ret;
547 }
548
549 /* create new dapm mux control */
550 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
551 {
552 struct snd_soc_dapm_context *dapm = w->dapm;
553 struct snd_soc_dapm_path *path = NULL;
554 struct snd_kcontrol *kcontrol;
555 struct snd_card *card = dapm->card->snd_card;
556 const char *prefix;
557 size_t prefix_len;
558 int ret;
559 struct snd_soc_dapm_widget_list *wlist;
560 int shared, wlistentries;
561 size_t wlistsize;
562 char *name;
563
564 if (w->num_kcontrols != 1) {
565 dev_err(dapm->dev,
566 "asoc: mux %s has incorrect number of controls\n",
567 w->name);
568 return -EINVAL;
569 }
570
571 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
572 &kcontrol);
573 if (kcontrol) {
574 wlist = kcontrol->private_data;
575 wlistentries = wlist->num_widgets + 1;
576 } else {
577 wlist = NULL;
578 wlistentries = 1;
579 }
580 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
581 wlistentries * sizeof(struct snd_soc_dapm_widget *),
582 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
583 if (wlist == NULL) {
584 dev_err(dapm->dev,
585 "asoc: can't allocate widget list for %s\n", w->name);
586 return -ENOMEM;
587 }
588 wlist->num_widgets = wlistentries;
589 wlist->widgets[wlistentries - 1] = w;
590
591 if (!kcontrol) {
592 if (dapm->codec)
593 prefix = dapm->codec->name_prefix;
594 else
595 prefix = NULL;
596
597 if (shared) {
598 name = w->kcontrol_news[0].name;
599 prefix_len = 0;
600 } else {
601 name = w->name;
602 if (prefix)
603 prefix_len = strlen(prefix) + 1;
604 else
605 prefix_len = 0;
606 }
607
608 /*
609 * The control will get a prefix from the control creation
610 * process but we're also using the same prefix for widgets so
611 * cut the prefix off the front of the widget name.
612 */
613 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
614 name + prefix_len, prefix);
615 ret = snd_ctl_add(card, kcontrol);
616 if (ret < 0) {
617 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
618 w->name, ret);
619 kfree(wlist);
620 return ret;
621 }
622 }
623
624 kcontrol->private_data = wlist;
625
626 w->kcontrols[0] = kcontrol;
627
628 list_for_each_entry(path, &w->sources, list_sink)
629 path->kcontrol = kcontrol;
630
631 return 0;
632 }
633
634 /* create new dapm volume control */
635 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
636 {
637 if (w->num_kcontrols)
638 dev_err(w->dapm->dev,
639 "asoc: PGA controls not supported: '%s'\n", w->name);
640
641 return 0;
642 }
643
644 /* reset 'walked' bit for each dapm path */
645 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
646 {
647 struct snd_soc_dapm_path *p;
648
649 list_for_each_entry(p, &dapm->card->paths, list)
650 p->walked = 0;
651 }
652
653 /* We implement power down on suspend by checking the power state of
654 * the ALSA card - when we are suspending the ALSA state for the card
655 * is set to D3.
656 */
657 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
658 {
659 int level = snd_power_get_state(widget->dapm->card->snd_card);
660
661 switch (level) {
662 case SNDRV_CTL_POWER_D3hot:
663 case SNDRV_CTL_POWER_D3cold:
664 if (widget->ignore_suspend)
665 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
666 widget->name);
667 return widget->ignore_suspend;
668 default:
669 return 1;
670 }
671 }
672
673 /*
674 * Recursively check for a completed path to an active or physically connected
675 * output widget. Returns number of complete paths.
676 */
677 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
678 {
679 struct snd_soc_dapm_path *path;
680 int con = 0;
681
682 if (widget->outputs >= 0)
683 return widget->outputs;
684
685 DAPM_UPDATE_STAT(widget, path_checks);
686
687 switch (widget->id) {
688 case snd_soc_dapm_supply:
689 case snd_soc_dapm_regulator_supply:
690 return 0;
691 default:
692 break;
693 }
694
695 switch (widget->id) {
696 case snd_soc_dapm_adc:
697 case snd_soc_dapm_aif_out:
698 if (widget->active) {
699 widget->outputs = snd_soc_dapm_suspend_check(widget);
700 return widget->outputs;
701 }
702 default:
703 break;
704 }
705
706 if (widget->connected) {
707 /* connected pin ? */
708 if (widget->id == snd_soc_dapm_output && !widget->ext) {
709 widget->outputs = snd_soc_dapm_suspend_check(widget);
710 return widget->outputs;
711 }
712
713 /* connected jack or spk ? */
714 if (widget->id == snd_soc_dapm_hp ||
715 widget->id == snd_soc_dapm_spk ||
716 (widget->id == snd_soc_dapm_line &&
717 !list_empty(&widget->sources))) {
718 widget->outputs = snd_soc_dapm_suspend_check(widget);
719 return widget->outputs;
720 }
721 }
722
723 list_for_each_entry(path, &widget->sinks, list_source) {
724 DAPM_UPDATE_STAT(widget, neighbour_checks);
725
726 if (path->weak)
727 continue;
728
729 if (path->walked)
730 continue;
731
732 if (path->sink && path->connect) {
733 path->walked = 1;
734 con += is_connected_output_ep(path->sink);
735 }
736 }
737
738 widget->outputs = con;
739
740 return con;
741 }
742
743 /*
744 * Recursively check for a completed path to an active or physically connected
745 * input widget. Returns number of complete paths.
746 */
747 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
748 {
749 struct snd_soc_dapm_path *path;
750 int con = 0;
751
752 if (widget->inputs >= 0)
753 return widget->inputs;
754
755 DAPM_UPDATE_STAT(widget, path_checks);
756
757 switch (widget->id) {
758 case snd_soc_dapm_supply:
759 case snd_soc_dapm_regulator_supply:
760 return 0;
761 default:
762 break;
763 }
764
765 /* active stream ? */
766 switch (widget->id) {
767 case snd_soc_dapm_dac:
768 case snd_soc_dapm_aif_in:
769 if (widget->active) {
770 widget->inputs = snd_soc_dapm_suspend_check(widget);
771 return widget->inputs;
772 }
773 default:
774 break;
775 }
776
777 if (widget->connected) {
778 /* connected pin ? */
779 if (widget->id == snd_soc_dapm_input && !widget->ext) {
780 widget->inputs = snd_soc_dapm_suspend_check(widget);
781 return widget->inputs;
782 }
783
784 /* connected VMID/Bias for lower pops */
785 if (widget->id == snd_soc_dapm_vmid) {
786 widget->inputs = snd_soc_dapm_suspend_check(widget);
787 return widget->inputs;
788 }
789
790 /* connected jack ? */
791 if (widget->id == snd_soc_dapm_mic ||
792 (widget->id == snd_soc_dapm_line &&
793 !list_empty(&widget->sinks))) {
794 widget->inputs = snd_soc_dapm_suspend_check(widget);
795 return widget->inputs;
796 }
797
798 /* signal generator */
799 if (widget->id == snd_soc_dapm_siggen) {
800 widget->inputs = snd_soc_dapm_suspend_check(widget);
801 return widget->inputs;
802 }
803 }
804
805 list_for_each_entry(path, &widget->sources, list_sink) {
806 DAPM_UPDATE_STAT(widget, neighbour_checks);
807
808 if (path->weak)
809 continue;
810
811 if (path->walked)
812 continue;
813
814 if (path->source && path->connect) {
815 path->walked = 1;
816 con += is_connected_input_ep(path->source);
817 }
818 }
819
820 widget->inputs = con;
821
822 return con;
823 }
824
825 /*
826 * Handler for generic register modifier widget.
827 */
828 int dapm_reg_event(struct snd_soc_dapm_widget *w,
829 struct snd_kcontrol *kcontrol, int event)
830 {
831 unsigned int val;
832
833 if (SND_SOC_DAPM_EVENT_ON(event))
834 val = w->on_val;
835 else
836 val = w->off_val;
837
838 soc_widget_update_bits(w, -(w->reg + 1),
839 w->mask << w->shift, val << w->shift);
840
841 return 0;
842 }
843 EXPORT_SYMBOL_GPL(dapm_reg_event);
844
845 /*
846 * Handler for regulator supply widget.
847 */
848 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
849 struct snd_kcontrol *kcontrol, int event)
850 {
851 if (SND_SOC_DAPM_EVENT_ON(event))
852 return regulator_enable(w->priv);
853 else
854 return regulator_disable_deferred(w->priv, w->shift);
855 }
856 EXPORT_SYMBOL_GPL(dapm_regulator_event);
857
858 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
859 {
860 if (w->power_checked)
861 return w->new_power;
862
863 if (w->force)
864 w->new_power = 1;
865 else
866 w->new_power = w->power_check(w);
867
868 w->power_checked = true;
869
870 return w->new_power;
871 }
872
873 /* Generic check to see if a widget should be powered.
874 */
875 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
876 {
877 int in, out;
878
879 DAPM_UPDATE_STAT(w, power_checks);
880
881 in = is_connected_input_ep(w);
882 dapm_clear_walk(w->dapm);
883 out = is_connected_output_ep(w);
884 dapm_clear_walk(w->dapm);
885 return out != 0 && in != 0;
886 }
887
888 /* Check to see if an ADC has power */
889 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
890 {
891 int in;
892
893 DAPM_UPDATE_STAT(w, power_checks);
894
895 if (w->active) {
896 in = is_connected_input_ep(w);
897 dapm_clear_walk(w->dapm);
898 return in != 0;
899 } else {
900 return dapm_generic_check_power(w);
901 }
902 }
903
904 /* Check to see if a DAC has power */
905 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
906 {
907 int out;
908
909 DAPM_UPDATE_STAT(w, power_checks);
910
911 if (w->active) {
912 out = is_connected_output_ep(w);
913 dapm_clear_walk(w->dapm);
914 return out != 0;
915 } else {
916 return dapm_generic_check_power(w);
917 }
918 }
919
920 /* Check to see if a power supply is needed */
921 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
922 {
923 struct snd_soc_dapm_path *path;
924
925 DAPM_UPDATE_STAT(w, power_checks);
926
927 /* Check if one of our outputs is connected */
928 list_for_each_entry(path, &w->sinks, list_source) {
929 DAPM_UPDATE_STAT(w, neighbour_checks);
930
931 if (path->weak)
932 continue;
933
934 if (path->connected &&
935 !path->connected(path->source, path->sink))
936 continue;
937
938 if (!path->sink)
939 continue;
940
941 if (dapm_widget_power_check(path->sink))
942 return 1;
943 }
944
945 dapm_clear_walk(w->dapm);
946
947 return 0;
948 }
949
950 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
951 {
952 return 1;
953 }
954
955 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
956 struct snd_soc_dapm_widget *b,
957 bool power_up)
958 {
959 int *sort;
960
961 if (power_up)
962 sort = dapm_up_seq;
963 else
964 sort = dapm_down_seq;
965
966 if (sort[a->id] != sort[b->id])
967 return sort[a->id] - sort[b->id];
968 if (a->subseq != b->subseq) {
969 if (power_up)
970 return a->subseq - b->subseq;
971 else
972 return b->subseq - a->subseq;
973 }
974 if (a->reg != b->reg)
975 return a->reg - b->reg;
976 if (a->dapm != b->dapm)
977 return (unsigned long)a->dapm - (unsigned long)b->dapm;
978
979 return 0;
980 }
981
982 /* Insert a widget in order into a DAPM power sequence. */
983 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
984 struct list_head *list,
985 bool power_up)
986 {
987 struct snd_soc_dapm_widget *w;
988
989 list_for_each_entry(w, list, power_list)
990 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
991 list_add_tail(&new_widget->power_list, &w->power_list);
992 return;
993 }
994
995 list_add_tail(&new_widget->power_list, list);
996 }
997
998 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
999 struct snd_soc_dapm_widget *w, int event)
1000 {
1001 struct snd_soc_card *card = dapm->card;
1002 const char *ev_name;
1003 int power, ret;
1004
1005 switch (event) {
1006 case SND_SOC_DAPM_PRE_PMU:
1007 ev_name = "PRE_PMU";
1008 power = 1;
1009 break;
1010 case SND_SOC_DAPM_POST_PMU:
1011 ev_name = "POST_PMU";
1012 power = 1;
1013 break;
1014 case SND_SOC_DAPM_PRE_PMD:
1015 ev_name = "PRE_PMD";
1016 power = 0;
1017 break;
1018 case SND_SOC_DAPM_POST_PMD:
1019 ev_name = "POST_PMD";
1020 power = 0;
1021 break;
1022 default:
1023 BUG();
1024 return;
1025 }
1026
1027 if (w->power != power)
1028 return;
1029
1030 if (w->event && (w->event_flags & event)) {
1031 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
1032 w->name, ev_name);
1033 trace_snd_soc_dapm_widget_event_start(w, event);
1034 ret = w->event(w, NULL, event);
1035 trace_snd_soc_dapm_widget_event_done(w, event);
1036 if (ret < 0)
1037 pr_err("%s: %s event failed: %d\n",
1038 ev_name, w->name, ret);
1039 }
1040 }
1041
1042 /* Apply the coalesced changes from a DAPM sequence */
1043 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
1044 struct list_head *pending)
1045 {
1046 struct snd_soc_card *card = dapm->card;
1047 struct snd_soc_dapm_widget *w;
1048 int reg, power;
1049 unsigned int value = 0;
1050 unsigned int mask = 0;
1051 unsigned int cur_mask;
1052
1053 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1054 power_list)->reg;
1055
1056 list_for_each_entry(w, pending, power_list) {
1057 cur_mask = 1 << w->shift;
1058 BUG_ON(reg != w->reg);
1059
1060 if (w->invert)
1061 power = !w->power;
1062 else
1063 power = w->power;
1064
1065 mask |= cur_mask;
1066 if (power)
1067 value |= cur_mask;
1068
1069 pop_dbg(dapm->dev, card->pop_time,
1070 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1071 w->name, reg, value, mask);
1072
1073 /* Check for events */
1074 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1075 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1076 }
1077
1078 if (reg >= 0) {
1079 /* Any widget will do, they should all be updating the
1080 * same register.
1081 */
1082 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1083 power_list);
1084
1085 pop_dbg(dapm->dev, card->pop_time,
1086 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1087 value, mask, reg, card->pop_time);
1088 pop_wait(card->pop_time);
1089 soc_widget_update_bits(w, reg, mask, value);
1090 }
1091
1092 list_for_each_entry(w, pending, power_list) {
1093 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1094 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1095 }
1096 }
1097
1098 /* Apply a DAPM power sequence.
1099 *
1100 * We walk over a pre-sorted list of widgets to apply power to. In
1101 * order to minimise the number of writes to the device required
1102 * multiple widgets will be updated in a single write where possible.
1103 * Currently anything that requires more than a single write is not
1104 * handled.
1105 */
1106 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1107 struct list_head *list, int event, bool power_up)
1108 {
1109 struct snd_soc_dapm_widget *w, *n;
1110 LIST_HEAD(pending);
1111 int cur_sort = -1;
1112 int cur_subseq = -1;
1113 int cur_reg = SND_SOC_NOPM;
1114 struct snd_soc_dapm_context *cur_dapm = NULL;
1115 int ret, i;
1116 int *sort;
1117
1118 if (power_up)
1119 sort = dapm_up_seq;
1120 else
1121 sort = dapm_down_seq;
1122
1123 list_for_each_entry_safe(w, n, list, power_list) {
1124 ret = 0;
1125
1126 /* Do we need to apply any queued changes? */
1127 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1128 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1129 if (!list_empty(&pending))
1130 dapm_seq_run_coalesced(cur_dapm, &pending);
1131
1132 if (cur_dapm && cur_dapm->seq_notifier) {
1133 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1134 if (sort[i] == cur_sort)
1135 cur_dapm->seq_notifier(cur_dapm,
1136 i,
1137 cur_subseq);
1138 }
1139
1140 INIT_LIST_HEAD(&pending);
1141 cur_sort = -1;
1142 cur_subseq = INT_MIN;
1143 cur_reg = SND_SOC_NOPM;
1144 cur_dapm = NULL;
1145 }
1146
1147 switch (w->id) {
1148 case snd_soc_dapm_pre:
1149 if (!w->event)
1150 list_for_each_entry_safe_continue(w, n, list,
1151 power_list);
1152
1153 if (event == SND_SOC_DAPM_STREAM_START)
1154 ret = w->event(w,
1155 NULL, SND_SOC_DAPM_PRE_PMU);
1156 else if (event == SND_SOC_DAPM_STREAM_STOP)
1157 ret = w->event(w,
1158 NULL, SND_SOC_DAPM_PRE_PMD);
1159 break;
1160
1161 case snd_soc_dapm_post:
1162 if (!w->event)
1163 list_for_each_entry_safe_continue(w, n, list,
1164 power_list);
1165
1166 if (event == SND_SOC_DAPM_STREAM_START)
1167 ret = w->event(w,
1168 NULL, SND_SOC_DAPM_POST_PMU);
1169 else if (event == SND_SOC_DAPM_STREAM_STOP)
1170 ret = w->event(w,
1171 NULL, SND_SOC_DAPM_POST_PMD);
1172 break;
1173
1174 default:
1175 /* Queue it up for application */
1176 cur_sort = sort[w->id];
1177 cur_subseq = w->subseq;
1178 cur_reg = w->reg;
1179 cur_dapm = w->dapm;
1180 list_move(&w->power_list, &pending);
1181 break;
1182 }
1183
1184 if (ret < 0)
1185 dev_err(w->dapm->dev,
1186 "Failed to apply widget power: %d\n", ret);
1187 }
1188
1189 if (!list_empty(&pending))
1190 dapm_seq_run_coalesced(cur_dapm, &pending);
1191
1192 if (cur_dapm && cur_dapm->seq_notifier) {
1193 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1194 if (sort[i] == cur_sort)
1195 cur_dapm->seq_notifier(cur_dapm,
1196 i, cur_subseq);
1197 }
1198 }
1199
1200 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1201 {
1202 struct snd_soc_dapm_update *update = dapm->update;
1203 struct snd_soc_dapm_widget *w;
1204 int ret;
1205
1206 if (!update)
1207 return;
1208
1209 w = update->widget;
1210
1211 if (w->event &&
1212 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1213 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1214 if (ret != 0)
1215 pr_err("%s DAPM pre-event failed: %d\n",
1216 w->name, ret);
1217 }
1218
1219 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1220 update->val);
1221 if (ret < 0)
1222 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1223
1224 if (w->event &&
1225 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1226 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1227 if (ret != 0)
1228 pr_err("%s DAPM post-event failed: %d\n",
1229 w->name, ret);
1230 }
1231 }
1232
1233 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1234 * they're changing state.
1235 */
1236 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1237 {
1238 struct snd_soc_dapm_context *d = data;
1239 int ret;
1240
1241 /* If we're off and we're not supposed to be go into STANDBY */
1242 if (d->bias_level == SND_SOC_BIAS_OFF &&
1243 d->target_bias_level != SND_SOC_BIAS_OFF) {
1244 if (d->dev)
1245 pm_runtime_get_sync(d->dev);
1246
1247 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1248 if (ret != 0)
1249 dev_err(d->dev,
1250 "Failed to turn on bias: %d\n", ret);
1251 }
1252
1253 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1254 if (d->bias_level != d->target_bias_level) {
1255 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1256 if (ret != 0)
1257 dev_err(d->dev,
1258 "Failed to prepare bias: %d\n", ret);
1259 }
1260 }
1261
1262 /* Async callback run prior to DAPM sequences - brings to their final
1263 * state.
1264 */
1265 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1266 {
1267 struct snd_soc_dapm_context *d = data;
1268 int ret;
1269
1270 /* If we just powered the last thing off drop to standby bias */
1271 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1272 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1273 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1274 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1275 if (ret != 0)
1276 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1277 ret);
1278 }
1279
1280 /* If we're in standby and can support bias off then do that */
1281 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1282 d->target_bias_level == SND_SOC_BIAS_OFF) {
1283 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1284 if (ret != 0)
1285 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1286
1287 if (d->dev)
1288 pm_runtime_put(d->dev);
1289 }
1290
1291 /* If we just powered up then move to active bias */
1292 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1293 d->target_bias_level == SND_SOC_BIAS_ON) {
1294 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1295 if (ret != 0)
1296 dev_err(d->dev, "Failed to apply active bias: %d\n",
1297 ret);
1298 }
1299 }
1300
1301 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1302 bool power, bool connect)
1303 {
1304 /* If a connection is being made or broken then that update
1305 * will have marked the peer dirty, otherwise the widgets are
1306 * not connected and this update has no impact. */
1307 if (!connect)
1308 return;
1309
1310 /* If the peer is already in the state we're moving to then we
1311 * won't have an impact on it. */
1312 if (power != peer->power)
1313 dapm_mark_dirty(peer, "peer state change");
1314 }
1315
1316 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1317 struct list_head *up_list,
1318 struct list_head *down_list)
1319 {
1320 struct snd_soc_dapm_path *path;
1321
1322 if (w->power == power)
1323 return;
1324
1325 trace_snd_soc_dapm_widget_power(w, power);
1326
1327 /* If we changed our power state perhaps our neigbours changed
1328 * also.
1329 */
1330 list_for_each_entry(path, &w->sources, list_sink) {
1331 if (path->source) {
1332 dapm_widget_set_peer_power(path->source, power,
1333 path->connect);
1334 }
1335 }
1336 switch (w->id) {
1337 case snd_soc_dapm_supply:
1338 case snd_soc_dapm_regulator_supply:
1339 /* Supplies can't affect their outputs, only their inputs */
1340 break;
1341 default:
1342 list_for_each_entry(path, &w->sinks, list_source) {
1343 if (path->sink) {
1344 dapm_widget_set_peer_power(path->sink, power,
1345 path->connect);
1346 }
1347 }
1348 break;
1349 }
1350
1351 if (power)
1352 dapm_seq_insert(w, up_list, true);
1353 else
1354 dapm_seq_insert(w, down_list, false);
1355
1356 w->power = power;
1357 }
1358
1359 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1360 struct list_head *up_list,
1361 struct list_head *down_list)
1362 {
1363 int power;
1364
1365 switch (w->id) {
1366 case snd_soc_dapm_pre:
1367 dapm_seq_insert(w, down_list, false);
1368 break;
1369 case snd_soc_dapm_post:
1370 dapm_seq_insert(w, up_list, true);
1371 break;
1372
1373 default:
1374 power = dapm_widget_power_check(w);
1375
1376 dapm_widget_set_power(w, power, up_list, down_list);
1377 break;
1378 }
1379 }
1380
1381 /*
1382 * Scan each dapm widget for complete audio path.
1383 * A complete path is a route that has valid endpoints i.e.:-
1384 *
1385 * o DAC to output pin.
1386 * o Input Pin to ADC.
1387 * o Input pin to Output pin (bypass, sidetone)
1388 * o DAC to ADC (loopback).
1389 */
1390 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1391 {
1392 struct snd_soc_card *card = dapm->card;
1393 struct snd_soc_dapm_widget *w;
1394 struct snd_soc_dapm_context *d;
1395 LIST_HEAD(up_list);
1396 LIST_HEAD(down_list);
1397 LIST_HEAD(async_domain);
1398 enum snd_soc_bias_level bias;
1399
1400 trace_snd_soc_dapm_start(card);
1401
1402 list_for_each_entry(d, &card->dapm_list, list) {
1403 if (d->n_widgets || d->codec == NULL) {
1404 if (d->idle_bias_off)
1405 d->target_bias_level = SND_SOC_BIAS_OFF;
1406 else
1407 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1408 }
1409 }
1410
1411 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
1412
1413 list_for_each_entry(w, &card->widgets, list) {
1414 w->power_checked = false;
1415 w->inputs = -1;
1416 w->outputs = -1;
1417 }
1418
1419 /* Check which widgets we need to power and store them in
1420 * lists indicating if they should be powered up or down. We
1421 * only check widgets that have been flagged as dirty but note
1422 * that new widgets may be added to the dirty list while we
1423 * iterate.
1424 */
1425 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1426 dapm_power_one_widget(w, &up_list, &down_list);
1427 }
1428
1429 list_for_each_entry(w, &card->widgets, list) {
1430 list_del_init(&w->dirty);
1431
1432 if (w->power) {
1433 d = w->dapm;
1434
1435 /* Supplies and micbiases only bring the
1436 * context up to STANDBY as unless something
1437 * else is active and passing audio they
1438 * generally don't require full power. Signal
1439 * generators are virtual pins and have no
1440 * power impact themselves.
1441 */
1442 switch (w->id) {
1443 case snd_soc_dapm_siggen:
1444 break;
1445 case snd_soc_dapm_supply:
1446 case snd_soc_dapm_regulator_supply:
1447 case snd_soc_dapm_micbias:
1448 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1449 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1450 break;
1451 default:
1452 d->target_bias_level = SND_SOC_BIAS_ON;
1453 break;
1454 }
1455 }
1456
1457 }
1458
1459 /* If there are no DAPM widgets then try to figure out power from the
1460 * event type.
1461 */
1462 if (!dapm->n_widgets) {
1463 switch (event) {
1464 case SND_SOC_DAPM_STREAM_START:
1465 case SND_SOC_DAPM_STREAM_RESUME:
1466 dapm->target_bias_level = SND_SOC_BIAS_ON;
1467 break;
1468 case SND_SOC_DAPM_STREAM_STOP:
1469 if (dapm->codec && dapm->codec->active)
1470 dapm->target_bias_level = SND_SOC_BIAS_ON;
1471 else
1472 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1473 break;
1474 case SND_SOC_DAPM_STREAM_SUSPEND:
1475 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1476 break;
1477 case SND_SOC_DAPM_STREAM_NOP:
1478 dapm->target_bias_level = dapm->bias_level;
1479 break;
1480 default:
1481 break;
1482 }
1483 }
1484
1485 /* Force all contexts in the card to the same bias state if
1486 * they're not ground referenced.
1487 */
1488 bias = SND_SOC_BIAS_OFF;
1489 list_for_each_entry(d, &card->dapm_list, list)
1490 if (d->target_bias_level > bias)
1491 bias = d->target_bias_level;
1492 list_for_each_entry(d, &card->dapm_list, list)
1493 if (!d->idle_bias_off)
1494 d->target_bias_level = bias;
1495
1496 trace_snd_soc_dapm_walk_done(card);
1497
1498 /* Run all the bias changes in parallel */
1499 list_for_each_entry(d, &dapm->card->dapm_list, list)
1500 async_schedule_domain(dapm_pre_sequence_async, d,
1501 &async_domain);
1502 async_synchronize_full_domain(&async_domain);
1503
1504 /* Power down widgets first; try to avoid amplifying pops. */
1505 dapm_seq_run(dapm, &down_list, event, false);
1506
1507 dapm_widget_update(dapm);
1508
1509 /* Now power up. */
1510 dapm_seq_run(dapm, &up_list, event, true);
1511
1512 /* Run all the bias changes in parallel */
1513 list_for_each_entry(d, &dapm->card->dapm_list, list)
1514 async_schedule_domain(dapm_post_sequence_async, d,
1515 &async_domain);
1516 async_synchronize_full_domain(&async_domain);
1517
1518 pop_dbg(dapm->dev, card->pop_time,
1519 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1520 pop_wait(card->pop_time);
1521
1522 trace_snd_soc_dapm_done(card);
1523
1524 return 0;
1525 }
1526
1527 #ifdef CONFIG_DEBUG_FS
1528 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1529 {
1530 file->private_data = inode->i_private;
1531 return 0;
1532 }
1533
1534 static ssize_t dapm_widget_power_read_file(struct file *file,
1535 char __user *user_buf,
1536 size_t count, loff_t *ppos)
1537 {
1538 struct snd_soc_dapm_widget *w = file->private_data;
1539 char *buf;
1540 int in, out;
1541 ssize_t ret;
1542 struct snd_soc_dapm_path *p = NULL;
1543
1544 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1545 if (!buf)
1546 return -ENOMEM;
1547
1548 in = is_connected_input_ep(w);
1549 dapm_clear_walk(w->dapm);
1550 out = is_connected_output_ep(w);
1551 dapm_clear_walk(w->dapm);
1552
1553 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1554 w->name, w->power ? "On" : "Off", in, out);
1555
1556 if (w->reg >= 0)
1557 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1558 " - R%d(0x%x) bit %d",
1559 w->reg, w->reg, w->shift);
1560
1561 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1562
1563 if (w->sname)
1564 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1565 w->sname,
1566 w->active ? "active" : "inactive");
1567
1568 list_for_each_entry(p, &w->sources, list_sink) {
1569 if (p->connected && !p->connected(w, p->sink))
1570 continue;
1571
1572 if (p->connect)
1573 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1574 " in \"%s\" \"%s\"\n",
1575 p->name ? p->name : "static",
1576 p->source->name);
1577 }
1578 list_for_each_entry(p, &w->sinks, list_source) {
1579 if (p->connected && !p->connected(w, p->sink))
1580 continue;
1581
1582 if (p->connect)
1583 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1584 " out \"%s\" \"%s\"\n",
1585 p->name ? p->name : "static",
1586 p->sink->name);
1587 }
1588
1589 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1590
1591 kfree(buf);
1592 return ret;
1593 }
1594
1595 static const struct file_operations dapm_widget_power_fops = {
1596 .open = dapm_widget_power_open_file,
1597 .read = dapm_widget_power_read_file,
1598 .llseek = default_llseek,
1599 };
1600
1601 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1602 {
1603 file->private_data = inode->i_private;
1604 return 0;
1605 }
1606
1607 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1608 size_t count, loff_t *ppos)
1609 {
1610 struct snd_soc_dapm_context *dapm = file->private_data;
1611 char *level;
1612
1613 switch (dapm->bias_level) {
1614 case SND_SOC_BIAS_ON:
1615 level = "On\n";
1616 break;
1617 case SND_SOC_BIAS_PREPARE:
1618 level = "Prepare\n";
1619 break;
1620 case SND_SOC_BIAS_STANDBY:
1621 level = "Standby\n";
1622 break;
1623 case SND_SOC_BIAS_OFF:
1624 level = "Off\n";
1625 break;
1626 default:
1627 BUG();
1628 level = "Unknown\n";
1629 break;
1630 }
1631
1632 return simple_read_from_buffer(user_buf, count, ppos, level,
1633 strlen(level));
1634 }
1635
1636 static const struct file_operations dapm_bias_fops = {
1637 .open = dapm_bias_open_file,
1638 .read = dapm_bias_read_file,
1639 .llseek = default_llseek,
1640 };
1641
1642 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1643 struct dentry *parent)
1644 {
1645 struct dentry *d;
1646
1647 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1648
1649 if (!dapm->debugfs_dapm) {
1650 printk(KERN_WARNING
1651 "Failed to create DAPM debugfs directory\n");
1652 return;
1653 }
1654
1655 d = debugfs_create_file("bias_level", 0444,
1656 dapm->debugfs_dapm, dapm,
1657 &dapm_bias_fops);
1658 if (!d)
1659 dev_warn(dapm->dev,
1660 "ASoC: Failed to create bias level debugfs file\n");
1661 }
1662
1663 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1664 {
1665 struct snd_soc_dapm_context *dapm = w->dapm;
1666 struct dentry *d;
1667
1668 if (!dapm->debugfs_dapm || !w->name)
1669 return;
1670
1671 d = debugfs_create_file(w->name, 0444,
1672 dapm->debugfs_dapm, w,
1673 &dapm_widget_power_fops);
1674 if (!d)
1675 dev_warn(w->dapm->dev,
1676 "ASoC: Failed to create %s debugfs file\n",
1677 w->name);
1678 }
1679
1680 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1681 {
1682 debugfs_remove_recursive(dapm->debugfs_dapm);
1683 }
1684
1685 #else
1686 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1687 struct dentry *parent)
1688 {
1689 }
1690
1691 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1692 {
1693 }
1694
1695 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1696 {
1697 }
1698
1699 #endif
1700
1701 /* test and update the power status of a mux widget */
1702 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1703 struct snd_kcontrol *kcontrol, int change,
1704 int mux, struct soc_enum *e)
1705 {
1706 struct snd_soc_dapm_path *path;
1707 int found = 0;
1708
1709 if (widget->id != snd_soc_dapm_mux &&
1710 widget->id != snd_soc_dapm_virt_mux &&
1711 widget->id != snd_soc_dapm_value_mux)
1712 return -ENODEV;
1713
1714 if (!change)
1715 return 0;
1716
1717 /* find dapm widget path assoc with kcontrol */
1718 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1719 if (path->kcontrol != kcontrol)
1720 continue;
1721
1722 if (!path->name || !e->texts[mux])
1723 continue;
1724
1725 found = 1;
1726 /* we now need to match the string in the enum to the path */
1727 if (!(strcmp(path->name, e->texts[mux]))) {
1728 path->connect = 1; /* new connection */
1729 dapm_mark_dirty(path->source, "mux connection");
1730 } else {
1731 if (path->connect)
1732 dapm_mark_dirty(path->source,
1733 "mux disconnection");
1734 path->connect = 0; /* old connection must be powered down */
1735 }
1736 }
1737
1738 if (found) {
1739 dapm_mark_dirty(widget, "mux change");
1740 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1741 }
1742
1743 return 0;
1744 }
1745
1746 /* test and update the power status of a mixer or switch widget */
1747 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1748 struct snd_kcontrol *kcontrol, int connect)
1749 {
1750 struct snd_soc_dapm_path *path;
1751 int found = 0;
1752
1753 if (widget->id != snd_soc_dapm_mixer &&
1754 widget->id != snd_soc_dapm_mixer_named_ctl &&
1755 widget->id != snd_soc_dapm_switch)
1756 return -ENODEV;
1757
1758 /* find dapm widget path assoc with kcontrol */
1759 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1760 if (path->kcontrol != kcontrol)
1761 continue;
1762
1763 /* found, now check type */
1764 found = 1;
1765 path->connect = connect;
1766 dapm_mark_dirty(path->source, "mixer connection");
1767 }
1768
1769 if (found) {
1770 dapm_mark_dirty(widget, "mixer update");
1771 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1772 }
1773
1774 return 0;
1775 }
1776
1777 /* show dapm widget status in sys fs */
1778 static ssize_t dapm_widget_show(struct device *dev,
1779 struct device_attribute *attr, char *buf)
1780 {
1781 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
1782 struct snd_soc_codec *codec =rtd->codec;
1783 struct snd_soc_dapm_widget *w;
1784 int count = 0;
1785 char *state = "not set";
1786
1787 list_for_each_entry(w, &codec->card->widgets, list) {
1788 if (w->dapm != &codec->dapm)
1789 continue;
1790
1791 /* only display widgets that burnm power */
1792 switch (w->id) {
1793 case snd_soc_dapm_hp:
1794 case snd_soc_dapm_mic:
1795 case snd_soc_dapm_spk:
1796 case snd_soc_dapm_line:
1797 case snd_soc_dapm_micbias:
1798 case snd_soc_dapm_dac:
1799 case snd_soc_dapm_adc:
1800 case snd_soc_dapm_pga:
1801 case snd_soc_dapm_out_drv:
1802 case snd_soc_dapm_mixer:
1803 case snd_soc_dapm_mixer_named_ctl:
1804 case snd_soc_dapm_supply:
1805 case snd_soc_dapm_regulator_supply:
1806 if (w->name)
1807 count += sprintf(buf + count, "%s: %s\n",
1808 w->name, w->power ? "On":"Off");
1809 break;
1810 default:
1811 break;
1812 }
1813 }
1814
1815 switch (codec->dapm.bias_level) {
1816 case SND_SOC_BIAS_ON:
1817 state = "On";
1818 break;
1819 case SND_SOC_BIAS_PREPARE:
1820 state = "Prepare";
1821 break;
1822 case SND_SOC_BIAS_STANDBY:
1823 state = "Standby";
1824 break;
1825 case SND_SOC_BIAS_OFF:
1826 state = "Off";
1827 break;
1828 }
1829 count += sprintf(buf + count, "PM State: %s\n", state);
1830
1831 return count;
1832 }
1833
1834 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1835
1836 int snd_soc_dapm_sys_add(struct device *dev)
1837 {
1838 return device_create_file(dev, &dev_attr_dapm_widget);
1839 }
1840
1841 static void snd_soc_dapm_sys_remove(struct device *dev)
1842 {
1843 device_remove_file(dev, &dev_attr_dapm_widget);
1844 }
1845
1846 /* free all dapm widgets and resources */
1847 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1848 {
1849 struct snd_soc_dapm_widget *w, *next_w;
1850 struct snd_soc_dapm_path *p, *next_p;
1851
1852 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1853 if (w->dapm != dapm)
1854 continue;
1855 list_del(&w->list);
1856 /*
1857 * remove source and sink paths associated to this widget.
1858 * While removing the path, remove reference to it from both
1859 * source and sink widgets so that path is removed only once.
1860 */
1861 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1862 list_del(&p->list_sink);
1863 list_del(&p->list_source);
1864 list_del(&p->list);
1865 kfree(p->long_name);
1866 kfree(p);
1867 }
1868 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1869 list_del(&p->list_sink);
1870 list_del(&p->list_source);
1871 list_del(&p->list);
1872 kfree(p->long_name);
1873 kfree(p);
1874 }
1875 kfree(w->kcontrols);
1876 kfree(w->name);
1877 kfree(w);
1878 }
1879 }
1880
1881 static struct snd_soc_dapm_widget *dapm_find_widget(
1882 struct snd_soc_dapm_context *dapm, const char *pin,
1883 bool search_other_contexts)
1884 {
1885 struct snd_soc_dapm_widget *w;
1886 struct snd_soc_dapm_widget *fallback = NULL;
1887
1888 list_for_each_entry(w, &dapm->card->widgets, list) {
1889 if (!strcmp(w->name, pin)) {
1890 if (w->dapm == dapm)
1891 return w;
1892 else
1893 fallback = w;
1894 }
1895 }
1896
1897 if (search_other_contexts)
1898 return fallback;
1899
1900 return NULL;
1901 }
1902
1903 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1904 const char *pin, int status)
1905 {
1906 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1907
1908 if (!w) {
1909 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1910 return -EINVAL;
1911 }
1912
1913 w->connected = status;
1914 if (status == 0)
1915 w->force = 0;
1916 dapm_mark_dirty(w, "pin configuration");
1917
1918 return 0;
1919 }
1920
1921 /**
1922 * snd_soc_dapm_sync - scan and power dapm paths
1923 * @dapm: DAPM context
1924 *
1925 * Walks all dapm audio paths and powers widgets according to their
1926 * stream or path usage.
1927 *
1928 * Returns 0 for success.
1929 */
1930 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1931 {
1932 /*
1933 * Suppress early reports (eg, jacks syncing their state) to avoid
1934 * silly DAPM runs during card startup.
1935 */
1936 if (!dapm->card || !dapm->card->instantiated)
1937 return 0;
1938
1939 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1940 }
1941 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1942
1943 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1944 const struct snd_soc_dapm_route *route)
1945 {
1946 struct snd_soc_dapm_path *path;
1947 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1948 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1949 const char *sink;
1950 const char *control = route->control;
1951 const char *source;
1952 char prefixed_sink[80];
1953 char prefixed_source[80];
1954 int ret = 0;
1955
1956 if (dapm->codec && dapm->codec->name_prefix) {
1957 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1958 dapm->codec->name_prefix, route->sink);
1959 sink = prefixed_sink;
1960 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1961 dapm->codec->name_prefix, route->source);
1962 source = prefixed_source;
1963 } else {
1964 sink = route->sink;
1965 source = route->source;
1966 }
1967
1968 /*
1969 * find src and dest widgets over all widgets but favor a widget from
1970 * current DAPM context
1971 */
1972 list_for_each_entry(w, &dapm->card->widgets, list) {
1973 if (!wsink && !(strcmp(w->name, sink))) {
1974 wtsink = w;
1975 if (w->dapm == dapm)
1976 wsink = w;
1977 continue;
1978 }
1979 if (!wsource && !(strcmp(w->name, source))) {
1980 wtsource = w;
1981 if (w->dapm == dapm)
1982 wsource = w;
1983 }
1984 }
1985 /* use widget from another DAPM context if not found from this */
1986 if (!wsink)
1987 wsink = wtsink;
1988 if (!wsource)
1989 wsource = wtsource;
1990
1991 if (wsource == NULL || wsink == NULL)
1992 return -ENODEV;
1993
1994 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1995 if (!path)
1996 return -ENOMEM;
1997
1998 path->source = wsource;
1999 path->sink = wsink;
2000 path->connected = route->connected;
2001 INIT_LIST_HEAD(&path->list);
2002 INIT_LIST_HEAD(&path->list_source);
2003 INIT_LIST_HEAD(&path->list_sink);
2004
2005 /* check for external widgets */
2006 if (wsink->id == snd_soc_dapm_input) {
2007 if (wsource->id == snd_soc_dapm_micbias ||
2008 wsource->id == snd_soc_dapm_mic ||
2009 wsource->id == snd_soc_dapm_line ||
2010 wsource->id == snd_soc_dapm_output)
2011 wsink->ext = 1;
2012 }
2013 if (wsource->id == snd_soc_dapm_output) {
2014 if (wsink->id == snd_soc_dapm_spk ||
2015 wsink->id == snd_soc_dapm_hp ||
2016 wsink->id == snd_soc_dapm_line ||
2017 wsink->id == snd_soc_dapm_input)
2018 wsource->ext = 1;
2019 }
2020
2021 /* connect static paths */
2022 if (control == NULL) {
2023 list_add(&path->list, &dapm->card->paths);
2024 list_add(&path->list_sink, &wsink->sources);
2025 list_add(&path->list_source, &wsource->sinks);
2026 path->connect = 1;
2027 return 0;
2028 }
2029
2030 /* connect dynamic paths */
2031 switch (wsink->id) {
2032 case snd_soc_dapm_adc:
2033 case snd_soc_dapm_dac:
2034 case snd_soc_dapm_pga:
2035 case snd_soc_dapm_out_drv:
2036 case snd_soc_dapm_input:
2037 case snd_soc_dapm_output:
2038 case snd_soc_dapm_siggen:
2039 case snd_soc_dapm_micbias:
2040 case snd_soc_dapm_vmid:
2041 case snd_soc_dapm_pre:
2042 case snd_soc_dapm_post:
2043 case snd_soc_dapm_supply:
2044 case snd_soc_dapm_regulator_supply:
2045 case snd_soc_dapm_aif_in:
2046 case snd_soc_dapm_aif_out:
2047 list_add(&path->list, &dapm->card->paths);
2048 list_add(&path->list_sink, &wsink->sources);
2049 list_add(&path->list_source, &wsource->sinks);
2050 path->connect = 1;
2051 return 0;
2052 case snd_soc_dapm_mux:
2053 case snd_soc_dapm_virt_mux:
2054 case snd_soc_dapm_value_mux:
2055 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2056 &wsink->kcontrol_news[0]);
2057 if (ret != 0)
2058 goto err;
2059 break;
2060 case snd_soc_dapm_switch:
2061 case snd_soc_dapm_mixer:
2062 case snd_soc_dapm_mixer_named_ctl:
2063 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2064 if (ret != 0)
2065 goto err;
2066 break;
2067 case snd_soc_dapm_hp:
2068 case snd_soc_dapm_mic:
2069 case snd_soc_dapm_line:
2070 case snd_soc_dapm_spk:
2071 list_add(&path->list, &dapm->card->paths);
2072 list_add(&path->list_sink, &wsink->sources);
2073 list_add(&path->list_source, &wsource->sinks);
2074 path->connect = 0;
2075 return 0;
2076 }
2077 return 0;
2078
2079 err:
2080 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
2081 source, control, sink);
2082 kfree(path);
2083 return ret;
2084 }
2085
2086 /**
2087 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2088 * @dapm: DAPM context
2089 * @route: audio routes
2090 * @num: number of routes
2091 *
2092 * Connects 2 dapm widgets together via a named audio path. The sink is
2093 * the widget receiving the audio signal, whilst the source is the sender
2094 * of the audio signal.
2095 *
2096 * Returns 0 for success else error. On error all resources can be freed
2097 * with a call to snd_soc_card_free().
2098 */
2099 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2100 const struct snd_soc_dapm_route *route, int num)
2101 {
2102 int i, ret;
2103
2104 for (i = 0; i < num; i++) {
2105 ret = snd_soc_dapm_add_route(dapm, route);
2106 if (ret < 0) {
2107 dev_err(dapm->dev, "Failed to add route %s->%s\n",
2108 route->source, route->sink);
2109 return ret;
2110 }
2111 route++;
2112 }
2113
2114 return 0;
2115 }
2116 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2117
2118 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2119 const struct snd_soc_dapm_route *route)
2120 {
2121 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2122 route->source,
2123 true);
2124 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2125 route->sink,
2126 true);
2127 struct snd_soc_dapm_path *path;
2128 int count = 0;
2129
2130 if (!source) {
2131 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
2132 route->source);
2133 return -ENODEV;
2134 }
2135
2136 if (!sink) {
2137 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
2138 route->sink);
2139 return -ENODEV;
2140 }
2141
2142 if (route->control || route->connected)
2143 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
2144 route->source, route->sink);
2145
2146 list_for_each_entry(path, &source->sinks, list_source) {
2147 if (path->sink == sink) {
2148 path->weak = 1;
2149 count++;
2150 }
2151 }
2152
2153 if (count == 0)
2154 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
2155 route->source, route->sink);
2156 if (count > 1)
2157 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
2158 count, route->source, route->sink);
2159
2160 return 0;
2161 }
2162
2163 /**
2164 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2165 * @dapm: DAPM context
2166 * @route: audio routes
2167 * @num: number of routes
2168 *
2169 * Mark existing routes matching those specified in the passed array
2170 * as being weak, meaning that they are ignored for the purpose of
2171 * power decisions. The main intended use case is for sidetone paths
2172 * which couple audio between other independent paths if they are both
2173 * active in order to make the combination work better at the user
2174 * level but which aren't intended to be "used".
2175 *
2176 * Note that CODEC drivers should not use this as sidetone type paths
2177 * can frequently also be used as bypass paths.
2178 */
2179 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2180 const struct snd_soc_dapm_route *route, int num)
2181 {
2182 int i, err;
2183 int ret = 0;
2184
2185 for (i = 0; i < num; i++) {
2186 err = snd_soc_dapm_weak_route(dapm, route);
2187 if (err)
2188 ret = err;
2189 route++;
2190 }
2191
2192 return ret;
2193 }
2194 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2195
2196 /**
2197 * snd_soc_dapm_new_widgets - add new dapm widgets
2198 * @dapm: DAPM context
2199 *
2200 * Checks the codec for any new dapm widgets and creates them if found.
2201 *
2202 * Returns 0 for success.
2203 */
2204 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2205 {
2206 struct snd_soc_dapm_widget *w;
2207 unsigned int val;
2208
2209 list_for_each_entry(w, &dapm->card->widgets, list)
2210 {
2211 if (w->new)
2212 continue;
2213
2214 if (w->num_kcontrols) {
2215 w->kcontrols = kzalloc(w->num_kcontrols *
2216 sizeof(struct snd_kcontrol *),
2217 GFP_KERNEL);
2218 if (!w->kcontrols)
2219 return -ENOMEM;
2220 }
2221
2222 switch(w->id) {
2223 case snd_soc_dapm_switch:
2224 case snd_soc_dapm_mixer:
2225 case snd_soc_dapm_mixer_named_ctl:
2226 dapm_new_mixer(w);
2227 break;
2228 case snd_soc_dapm_mux:
2229 case snd_soc_dapm_virt_mux:
2230 case snd_soc_dapm_value_mux:
2231 dapm_new_mux(w);
2232 break;
2233 case snd_soc_dapm_pga:
2234 case snd_soc_dapm_out_drv:
2235 dapm_new_pga(w);
2236 break;
2237 default:
2238 break;
2239 }
2240
2241 /* Read the initial power state from the device */
2242 if (w->reg >= 0) {
2243 val = soc_widget_read(w, w->reg);
2244 val &= 1 << w->shift;
2245 if (w->invert)
2246 val = !val;
2247
2248 if (val)
2249 w->power = 1;
2250 }
2251
2252 w->new = 1;
2253
2254 dapm_mark_dirty(w, "new widget");
2255 dapm_debugfs_add_widget(w);
2256 }
2257
2258 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2259 return 0;
2260 }
2261 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2262
2263 /**
2264 * snd_soc_dapm_get_volsw - dapm mixer get callback
2265 * @kcontrol: mixer control
2266 * @ucontrol: control element information
2267 *
2268 * Callback to get the value of a dapm mixer control.
2269 *
2270 * Returns 0 for success.
2271 */
2272 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2273 struct snd_ctl_elem_value *ucontrol)
2274 {
2275 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2276 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2277 struct soc_mixer_control *mc =
2278 (struct soc_mixer_control *)kcontrol->private_value;
2279 unsigned int reg = mc->reg;
2280 unsigned int shift = mc->shift;
2281 unsigned int rshift = mc->rshift;
2282 int max = mc->max;
2283 unsigned int invert = mc->invert;
2284 unsigned int mask = (1 << fls(max)) - 1;
2285
2286 ucontrol->value.integer.value[0] =
2287 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2288 if (shift != rshift)
2289 ucontrol->value.integer.value[1] =
2290 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2291 if (invert) {
2292 ucontrol->value.integer.value[0] =
2293 max - ucontrol->value.integer.value[0];
2294 if (shift != rshift)
2295 ucontrol->value.integer.value[1] =
2296 max - ucontrol->value.integer.value[1];
2297 }
2298
2299 return 0;
2300 }
2301 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2302
2303 /**
2304 * snd_soc_dapm_put_volsw - dapm mixer set callback
2305 * @kcontrol: mixer control
2306 * @ucontrol: control element information
2307 *
2308 * Callback to set the value of a dapm mixer control.
2309 *
2310 * Returns 0 for success.
2311 */
2312 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2313 struct snd_ctl_elem_value *ucontrol)
2314 {
2315 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2316 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2317 struct snd_soc_codec *codec = widget->codec;
2318 struct soc_mixer_control *mc =
2319 (struct soc_mixer_control *)kcontrol->private_value;
2320 unsigned int reg = mc->reg;
2321 unsigned int shift = mc->shift;
2322 int max = mc->max;
2323 unsigned int mask = (1 << fls(max)) - 1;
2324 unsigned int invert = mc->invert;
2325 unsigned int val;
2326 int connect, change;
2327 struct snd_soc_dapm_update update;
2328 int wi;
2329
2330 val = (ucontrol->value.integer.value[0] & mask);
2331
2332 if (invert)
2333 val = max - val;
2334 mask = mask << shift;
2335 val = val << shift;
2336
2337 if (val)
2338 /* new connection */
2339 connect = invert ? 0 : 1;
2340 else
2341 /* old connection must be powered down */
2342 connect = invert ? 1 : 0;
2343
2344 mutex_lock(&codec->mutex);
2345
2346 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2347 if (change) {
2348 for (wi = 0; wi < wlist->num_widgets; wi++) {
2349 widget = wlist->widgets[wi];
2350
2351 widget->value = val;
2352
2353 update.kcontrol = kcontrol;
2354 update.widget = widget;
2355 update.reg = reg;
2356 update.mask = mask;
2357 update.val = val;
2358 widget->dapm->update = &update;
2359
2360 dapm_mixer_update_power(widget, kcontrol, connect);
2361
2362 widget->dapm->update = NULL;
2363 }
2364 }
2365
2366 mutex_unlock(&codec->mutex);
2367 return 0;
2368 }
2369 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2370
2371 /**
2372 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2373 * @kcontrol: mixer control
2374 * @ucontrol: control element information
2375 *
2376 * Callback to get the value of a dapm enumerated double mixer control.
2377 *
2378 * Returns 0 for success.
2379 */
2380 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2381 struct snd_ctl_elem_value *ucontrol)
2382 {
2383 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2384 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2385 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2386 unsigned int val, bitmask;
2387
2388 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2389 ;
2390 val = snd_soc_read(widget->codec, e->reg);
2391 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2392 if (e->shift_l != e->shift_r)
2393 ucontrol->value.enumerated.item[1] =
2394 (val >> e->shift_r) & (bitmask - 1);
2395
2396 return 0;
2397 }
2398 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2399
2400 /**
2401 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2402 * @kcontrol: mixer control
2403 * @ucontrol: control element information
2404 *
2405 * Callback to set the value of a dapm enumerated double mixer control.
2406 *
2407 * Returns 0 for success.
2408 */
2409 int snd_soc_dapm_put_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, bitmask;
2418 struct snd_soc_dapm_update update;
2419 int wi;
2420
2421 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2422 ;
2423 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2424 return -EINVAL;
2425 mux = ucontrol->value.enumerated.item[0];
2426 val = mux << e->shift_l;
2427 mask = (bitmask - 1) << e->shift_l;
2428 if (e->shift_l != e->shift_r) {
2429 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2430 return -EINVAL;
2431 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2432 mask |= (bitmask - 1) << e->shift_r;
2433 }
2434
2435 mutex_lock(&codec->mutex);
2436
2437 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2438 if (change) {
2439 for (wi = 0; wi < wlist->num_widgets; wi++) {
2440 widget = wlist->widgets[wi];
2441
2442 widget->value = val;
2443
2444 update.kcontrol = kcontrol;
2445 update.widget = widget;
2446 update.reg = e->reg;
2447 update.mask = mask;
2448 update.val = val;
2449 widget->dapm->update = &update;
2450
2451 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2452
2453 widget->dapm->update = NULL;
2454 }
2455 }
2456
2457 mutex_unlock(&codec->mutex);
2458 return change;
2459 }
2460 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2461
2462 /**
2463 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2464 * @kcontrol: mixer control
2465 * @ucontrol: control element information
2466 *
2467 * Returns 0 for success.
2468 */
2469 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2470 struct snd_ctl_elem_value *ucontrol)
2471 {
2472 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2473 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2474
2475 ucontrol->value.enumerated.item[0] = widget->value;
2476
2477 return 0;
2478 }
2479 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2480
2481 /**
2482 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2483 * @kcontrol: mixer control
2484 * @ucontrol: control element information
2485 *
2486 * Returns 0 for success.
2487 */
2488 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2489 struct snd_ctl_elem_value *ucontrol)
2490 {
2491 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2492 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2493 struct snd_soc_codec *codec = widget->codec;
2494 struct soc_enum *e =
2495 (struct soc_enum *)kcontrol->private_value;
2496 int change;
2497 int ret = 0;
2498 int wi;
2499
2500 if (ucontrol->value.enumerated.item[0] >= e->max)
2501 return -EINVAL;
2502
2503 mutex_lock(&codec->mutex);
2504
2505 change = widget->value != ucontrol->value.enumerated.item[0];
2506 if (change) {
2507 for (wi = 0; wi < wlist->num_widgets; wi++) {
2508 widget = wlist->widgets[wi];
2509
2510 widget->value = ucontrol->value.enumerated.item[0];
2511
2512 dapm_mux_update_power(widget, kcontrol, change,
2513 widget->value, e);
2514 }
2515 }
2516
2517 mutex_unlock(&codec->mutex);
2518 return ret;
2519 }
2520 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2521
2522 /**
2523 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2524 * callback
2525 * @kcontrol: mixer control
2526 * @ucontrol: control element information
2527 *
2528 * Callback to get the value of a dapm semi enumerated double mixer control.
2529 *
2530 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2531 * used for handling bitfield coded enumeration for example.
2532 *
2533 * Returns 0 for success.
2534 */
2535 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2536 struct snd_ctl_elem_value *ucontrol)
2537 {
2538 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2539 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2540 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2541 unsigned int reg_val, val, mux;
2542
2543 reg_val = snd_soc_read(widget->codec, e->reg);
2544 val = (reg_val >> e->shift_l) & e->mask;
2545 for (mux = 0; mux < e->max; mux++) {
2546 if (val == e->values[mux])
2547 break;
2548 }
2549 ucontrol->value.enumerated.item[0] = mux;
2550 if (e->shift_l != e->shift_r) {
2551 val = (reg_val >> e->shift_r) & e->mask;
2552 for (mux = 0; mux < e->max; mux++) {
2553 if (val == e->values[mux])
2554 break;
2555 }
2556 ucontrol->value.enumerated.item[1] = mux;
2557 }
2558
2559 return 0;
2560 }
2561 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2562
2563 /**
2564 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2565 * callback
2566 * @kcontrol: mixer control
2567 * @ucontrol: control element information
2568 *
2569 * Callback to set the value of a dapm semi enumerated double mixer control.
2570 *
2571 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2572 * used for handling bitfield coded enumeration for example.
2573 *
2574 * Returns 0 for success.
2575 */
2576 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2577 struct snd_ctl_elem_value *ucontrol)
2578 {
2579 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2580 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2581 struct snd_soc_codec *codec = widget->codec;
2582 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2583 unsigned int val, mux, change;
2584 unsigned int mask;
2585 struct snd_soc_dapm_update update;
2586 int wi;
2587
2588 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2589 return -EINVAL;
2590 mux = ucontrol->value.enumerated.item[0];
2591 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2592 mask = e->mask << e->shift_l;
2593 if (e->shift_l != e->shift_r) {
2594 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2595 return -EINVAL;
2596 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2597 mask |= e->mask << e->shift_r;
2598 }
2599
2600 mutex_lock(&codec->mutex);
2601
2602 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2603 if (change) {
2604 for (wi = 0; wi < wlist->num_widgets; wi++) {
2605 widget = wlist->widgets[wi];
2606
2607 widget->value = val;
2608
2609 update.kcontrol = kcontrol;
2610 update.widget = widget;
2611 update.reg = e->reg;
2612 update.mask = mask;
2613 update.val = val;
2614 widget->dapm->update = &update;
2615
2616 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2617
2618 widget->dapm->update = NULL;
2619 }
2620 }
2621
2622 mutex_unlock(&codec->mutex);
2623 return change;
2624 }
2625 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2626
2627 /**
2628 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2629 *
2630 * @kcontrol: mixer control
2631 * @uinfo: control element information
2632 *
2633 * Callback to provide information about a pin switch control.
2634 */
2635 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2636 struct snd_ctl_elem_info *uinfo)
2637 {
2638 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2639 uinfo->count = 1;
2640 uinfo->value.integer.min = 0;
2641 uinfo->value.integer.max = 1;
2642
2643 return 0;
2644 }
2645 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2646
2647 /**
2648 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2649 *
2650 * @kcontrol: mixer control
2651 * @ucontrol: Value
2652 */
2653 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2654 struct snd_ctl_elem_value *ucontrol)
2655 {
2656 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2657 const char *pin = (const char *)kcontrol->private_value;
2658
2659 mutex_lock(&codec->mutex);
2660
2661 ucontrol->value.integer.value[0] =
2662 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2663
2664 mutex_unlock(&codec->mutex);
2665
2666 return 0;
2667 }
2668 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2669
2670 /**
2671 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2672 *
2673 * @kcontrol: mixer control
2674 * @ucontrol: Value
2675 */
2676 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2677 struct snd_ctl_elem_value *ucontrol)
2678 {
2679 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2680 const char *pin = (const char *)kcontrol->private_value;
2681
2682 mutex_lock(&codec->mutex);
2683
2684 if (ucontrol->value.integer.value[0])
2685 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2686 else
2687 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2688
2689 snd_soc_dapm_sync(&codec->dapm);
2690
2691 mutex_unlock(&codec->mutex);
2692
2693 return 0;
2694 }
2695 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2696
2697 /**
2698 * snd_soc_dapm_new_control - create new dapm control
2699 * @dapm: DAPM context
2700 * @widget: widget template
2701 *
2702 * Creates a new dapm control based upon the template.
2703 *
2704 * Returns 0 for success else error.
2705 */
2706 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2707 const struct snd_soc_dapm_widget *widget)
2708 {
2709 struct snd_soc_dapm_widget *w;
2710 size_t name_len;
2711 int ret;
2712
2713 if ((w = dapm_cnew_widget(widget)) == NULL)
2714 return -ENOMEM;
2715
2716 switch (w->id) {
2717 case snd_soc_dapm_regulator_supply:
2718 w->priv = devm_regulator_get(dapm->dev, w->name);
2719 if (IS_ERR(w->priv)) {
2720 ret = PTR_ERR(w->priv);
2721 dev_err(dapm->dev, "Failed to request %s: %d\n",
2722 w->name, ret);
2723 return ret;
2724 }
2725 break;
2726 default:
2727 break;
2728 }
2729
2730 name_len = strlen(widget->name) + 1;
2731 if (dapm->codec && dapm->codec->name_prefix)
2732 name_len += 1 + strlen(dapm->codec->name_prefix);
2733 w->name = kmalloc(name_len, GFP_KERNEL);
2734 if (w->name == NULL) {
2735 kfree(w);
2736 return -ENOMEM;
2737 }
2738 if (dapm->codec && dapm->codec->name_prefix)
2739 snprintf(w->name, name_len, "%s %s",
2740 dapm->codec->name_prefix, widget->name);
2741 else
2742 snprintf(w->name, name_len, "%s", widget->name);
2743
2744 switch (w->id) {
2745 case snd_soc_dapm_switch:
2746 case snd_soc_dapm_mixer:
2747 case snd_soc_dapm_mixer_named_ctl:
2748 w->power_check = dapm_generic_check_power;
2749 break;
2750 case snd_soc_dapm_mux:
2751 case snd_soc_dapm_virt_mux:
2752 case snd_soc_dapm_value_mux:
2753 w->power_check = dapm_generic_check_power;
2754 break;
2755 case snd_soc_dapm_adc:
2756 case snd_soc_dapm_aif_out:
2757 w->power_check = dapm_adc_check_power;
2758 break;
2759 case snd_soc_dapm_dac:
2760 case snd_soc_dapm_aif_in:
2761 w->power_check = dapm_dac_check_power;
2762 break;
2763 case snd_soc_dapm_pga:
2764 case snd_soc_dapm_out_drv:
2765 case snd_soc_dapm_input:
2766 case snd_soc_dapm_output:
2767 case snd_soc_dapm_micbias:
2768 case snd_soc_dapm_spk:
2769 case snd_soc_dapm_hp:
2770 case snd_soc_dapm_mic:
2771 case snd_soc_dapm_line:
2772 w->power_check = dapm_generic_check_power;
2773 break;
2774 case snd_soc_dapm_supply:
2775 case snd_soc_dapm_regulator_supply:
2776 w->power_check = dapm_supply_check_power;
2777 break;
2778 default:
2779 w->power_check = dapm_always_on_check_power;
2780 break;
2781 }
2782
2783 dapm->n_widgets++;
2784 w->dapm = dapm;
2785 w->codec = dapm->codec;
2786 w->platform = dapm->platform;
2787 INIT_LIST_HEAD(&w->sources);
2788 INIT_LIST_HEAD(&w->sinks);
2789 INIT_LIST_HEAD(&w->list);
2790 INIT_LIST_HEAD(&w->dirty);
2791 list_add(&w->list, &dapm->card->widgets);
2792
2793 /* machine layer set ups unconnected pins and insertions */
2794 w->connected = 1;
2795 return 0;
2796 }
2797 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2798
2799 /**
2800 * snd_soc_dapm_new_controls - create new dapm controls
2801 * @dapm: DAPM context
2802 * @widget: widget array
2803 * @num: number of widgets
2804 *
2805 * Creates new DAPM controls based upon the templates.
2806 *
2807 * Returns 0 for success else error.
2808 */
2809 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2810 const struct snd_soc_dapm_widget *widget,
2811 int num)
2812 {
2813 int i, ret;
2814
2815 for (i = 0; i < num; i++) {
2816 ret = snd_soc_dapm_new_control(dapm, widget);
2817 if (ret < 0) {
2818 dev_err(dapm->dev,
2819 "ASoC: Failed to create DAPM control %s: %d\n",
2820 widget->name, ret);
2821 return ret;
2822 }
2823 widget++;
2824 }
2825 return 0;
2826 }
2827 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2828
2829 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2830 const char *stream, int event)
2831 {
2832 struct snd_soc_dapm_widget *w;
2833
2834 list_for_each_entry(w, &dapm->card->widgets, list)
2835 {
2836 if (!w->sname || w->dapm != dapm)
2837 continue;
2838 dev_vdbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2839 w->name, w->sname, stream, event);
2840 if (strstr(w->sname, stream)) {
2841 dapm_mark_dirty(w, "stream event");
2842 switch(event) {
2843 case SND_SOC_DAPM_STREAM_START:
2844 w->active = 1;
2845 break;
2846 case SND_SOC_DAPM_STREAM_STOP:
2847 w->active = 0;
2848 break;
2849 case SND_SOC_DAPM_STREAM_SUSPEND:
2850 case SND_SOC_DAPM_STREAM_RESUME:
2851 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2852 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2853 break;
2854 }
2855 }
2856 }
2857
2858 dapm_power_widgets(dapm, event);
2859
2860 /* do we need to notify any clients that DAPM stream is complete */
2861 if (dapm->stream_event)
2862 dapm->stream_event(dapm, event);
2863 }
2864
2865 /**
2866 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2867 * @rtd: PCM runtime data
2868 * @stream: stream name
2869 * @event: stream event
2870 *
2871 * Sends a stream event to the dapm core. The core then makes any
2872 * necessary widget power changes.
2873 *
2874 * Returns 0 for success else error.
2875 */
2876 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2877 const char *stream, int event)
2878 {
2879 struct snd_soc_codec *codec = rtd->codec;
2880
2881 if (stream == NULL)
2882 return 0;
2883
2884 mutex_lock(&codec->mutex);
2885 soc_dapm_stream_event(&codec->dapm, stream, event);
2886 mutex_unlock(&codec->mutex);
2887 return 0;
2888 }
2889
2890 /**
2891 * snd_soc_dapm_enable_pin - enable pin.
2892 * @dapm: DAPM context
2893 * @pin: pin name
2894 *
2895 * Enables input/output pin and its parents or children widgets iff there is
2896 * a valid audio route and active audio stream.
2897 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2898 * do any widget power switching.
2899 */
2900 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2901 {
2902 return snd_soc_dapm_set_pin(dapm, pin, 1);
2903 }
2904 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2905
2906 /**
2907 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2908 * @dapm: DAPM context
2909 * @pin: pin name
2910 *
2911 * Enables input/output pin regardless of any other state. This is
2912 * intended for use with microphone bias supplies used in microphone
2913 * jack detection.
2914 *
2915 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2916 * do any widget power switching.
2917 */
2918 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2919 const char *pin)
2920 {
2921 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2922
2923 if (!w) {
2924 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2925 return -EINVAL;
2926 }
2927
2928 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2929 w->connected = 1;
2930 w->force = 1;
2931 dapm_mark_dirty(w, "force enable");
2932
2933 return 0;
2934 }
2935 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2936
2937 /**
2938 * snd_soc_dapm_disable_pin - disable pin.
2939 * @dapm: DAPM context
2940 * @pin: pin name
2941 *
2942 * Disables input/output pin and its parents or children widgets.
2943 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2944 * do any widget power switching.
2945 */
2946 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2947 const char *pin)
2948 {
2949 return snd_soc_dapm_set_pin(dapm, pin, 0);
2950 }
2951 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2952
2953 /**
2954 * snd_soc_dapm_nc_pin - permanently disable pin.
2955 * @dapm: DAPM context
2956 * @pin: pin name
2957 *
2958 * Marks the specified pin as being not connected, disabling it along
2959 * any parent or child widgets. At present this is identical to
2960 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2961 * additional things such as disabling controls which only affect
2962 * paths through the pin.
2963 *
2964 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2965 * do any widget power switching.
2966 */
2967 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2968 {
2969 return snd_soc_dapm_set_pin(dapm, pin, 0);
2970 }
2971 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2972
2973 /**
2974 * snd_soc_dapm_get_pin_status - get audio pin status
2975 * @dapm: DAPM context
2976 * @pin: audio signal pin endpoint (or start point)
2977 *
2978 * Get audio pin status - connected or disconnected.
2979 *
2980 * Returns 1 for connected otherwise 0.
2981 */
2982 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2983 const char *pin)
2984 {
2985 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2986
2987 if (w)
2988 return w->connected;
2989
2990 return 0;
2991 }
2992 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2993
2994 /**
2995 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2996 * @dapm: DAPM context
2997 * @pin: audio signal pin endpoint (or start point)
2998 *
2999 * Mark the given endpoint or pin as ignoring suspend. When the
3000 * system is disabled a path between two endpoints flagged as ignoring
3001 * suspend will not be disabled. The path must already be enabled via
3002 * normal means at suspend time, it will not be turned on if it was not
3003 * already enabled.
3004 */
3005 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3006 const char *pin)
3007 {
3008 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3009
3010 if (!w) {
3011 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
3012 return -EINVAL;
3013 }
3014
3015 w->ignore_suspend = 1;
3016
3017 return 0;
3018 }
3019 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3020
3021 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3022 struct snd_soc_dapm_widget *w)
3023 {
3024 struct snd_soc_dapm_path *p;
3025
3026 list_for_each_entry(p, &card->paths, list) {
3027 if ((p->source == w) || (p->sink == w)) {
3028 dev_dbg(card->dev,
3029 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3030 p->source->name, p->source->id, p->source->dapm,
3031 p->sink->name, p->sink->id, p->sink->dapm);
3032
3033 /* Connected to something other than the codec */
3034 if (p->source->dapm != p->sink->dapm)
3035 return true;
3036 /*
3037 * Loopback connection from codec external pin to
3038 * codec external pin
3039 */
3040 if (p->sink->id == snd_soc_dapm_input) {
3041 switch (p->source->id) {
3042 case snd_soc_dapm_output:
3043 case snd_soc_dapm_micbias:
3044 return true;
3045 default:
3046 break;
3047 }
3048 }
3049 }
3050 }
3051
3052 return false;
3053 }
3054
3055 /**
3056 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3057 * @codec: The codec whose pins should be processed
3058 *
3059 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3060 * which are unused. Pins are used if they are connected externally to the
3061 * codec, whether that be to some other device, or a loop-back connection to
3062 * the codec itself.
3063 */
3064 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3065 {
3066 struct snd_soc_card *card = codec->card;
3067 struct snd_soc_dapm_context *dapm = &codec->dapm;
3068 struct snd_soc_dapm_widget *w;
3069
3070 dev_dbg(codec->dev, "Auto NC: DAPMs: card:%p codec:%p\n",
3071 &card->dapm, &codec->dapm);
3072
3073 list_for_each_entry(w, &card->widgets, list) {
3074 if (w->dapm != dapm)
3075 continue;
3076 switch (w->id) {
3077 case snd_soc_dapm_input:
3078 case snd_soc_dapm_output:
3079 case snd_soc_dapm_micbias:
3080 dev_dbg(codec->dev, "Auto NC: Checking widget %s\n",
3081 w->name);
3082 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3083 dev_dbg(codec->dev,
3084 "... Not in map; disabling\n");
3085 snd_soc_dapm_nc_pin(dapm, w->name);
3086 }
3087 break;
3088 default:
3089 break;
3090 }
3091 }
3092 }
3093
3094 /**
3095 * snd_soc_dapm_free - free dapm resources
3096 * @dapm: DAPM context
3097 *
3098 * Free all dapm widgets and resources.
3099 */
3100 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3101 {
3102 snd_soc_dapm_sys_remove(dapm->dev);
3103 dapm_debugfs_cleanup(dapm);
3104 dapm_free_widgets(dapm);
3105 list_del(&dapm->list);
3106 }
3107 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3108
3109 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3110 {
3111 struct snd_soc_dapm_widget *w;
3112 LIST_HEAD(down_list);
3113 int powerdown = 0;
3114
3115 list_for_each_entry(w, &dapm->card->widgets, list) {
3116 if (w->dapm != dapm)
3117 continue;
3118 if (w->power) {
3119 dapm_seq_insert(w, &down_list, false);
3120 w->power = 0;
3121 powerdown = 1;
3122 }
3123 }
3124
3125 /* If there were no widgets to power down we're already in
3126 * standby.
3127 */
3128 if (powerdown) {
3129 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
3130 dapm_seq_run(dapm, &down_list, 0, false);
3131 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
3132 }
3133 }
3134
3135 /*
3136 * snd_soc_dapm_shutdown - callback for system shutdown
3137 */
3138 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3139 {
3140 struct snd_soc_codec *codec;
3141
3142 list_for_each_entry(codec, &card->codec_dev_list, list) {
3143 soc_dapm_shutdown_codec(&codec->dapm);
3144 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
3145 }
3146 }
3147
3148 /* Module information */
3149 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3150 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3151 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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