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ASoC: dapm: Use DAPM mutex for DAPM ops instead of codec mutex
[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/headphone 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 power down of audio subsystem to reduce pops between a quick
22 * device reopen.
23 *
24 */
25
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/init.h>
29 #include <linux/async.h>
30 #include <linux/delay.h>
31 #include <linux/pm.h>
32 #include <linux/bitops.h>
33 #include <linux/platform_device.h>
34 #include <linux/jiffies.h>
35 #include <linux/debugfs.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/regulator/consumer.h>
38 #include <linux/slab.h>
39 #include <sound/core.h>
40 #include <sound/pcm.h>
41 #include <sound/pcm_params.h>
42 #include <sound/soc.h>
43 #include <sound/initval.h>
44
45 #include <trace/events/asoc.h>
46
47 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
48
49 /* dapm power sequences - make this per codec in the future */
50 static int dapm_up_seq[] = {
51 [snd_soc_dapm_pre] = 0,
52 [snd_soc_dapm_supply] = 1,
53 [snd_soc_dapm_regulator_supply] = 1,
54 [snd_soc_dapm_micbias] = 2,
55 [snd_soc_dapm_dai] = 3,
56 [snd_soc_dapm_aif_in] = 3,
57 [snd_soc_dapm_aif_out] = 3,
58 [snd_soc_dapm_mic] = 4,
59 [snd_soc_dapm_mux] = 5,
60 [snd_soc_dapm_virt_mux] = 5,
61 [snd_soc_dapm_value_mux] = 5,
62 [snd_soc_dapm_dac] = 6,
63 [snd_soc_dapm_mixer] = 7,
64 [snd_soc_dapm_mixer_named_ctl] = 7,
65 [snd_soc_dapm_pga] = 8,
66 [snd_soc_dapm_adc] = 9,
67 [snd_soc_dapm_out_drv] = 10,
68 [snd_soc_dapm_hp] = 10,
69 [snd_soc_dapm_spk] = 10,
70 [snd_soc_dapm_post] = 11,
71 };
72
73 static int dapm_down_seq[] = {
74 [snd_soc_dapm_pre] = 0,
75 [snd_soc_dapm_adc] = 1,
76 [snd_soc_dapm_hp] = 2,
77 [snd_soc_dapm_spk] = 2,
78 [snd_soc_dapm_out_drv] = 2,
79 [snd_soc_dapm_pga] = 4,
80 [snd_soc_dapm_mixer_named_ctl] = 5,
81 [snd_soc_dapm_mixer] = 5,
82 [snd_soc_dapm_dac] = 6,
83 [snd_soc_dapm_mic] = 7,
84 [snd_soc_dapm_micbias] = 8,
85 [snd_soc_dapm_mux] = 9,
86 [snd_soc_dapm_virt_mux] = 9,
87 [snd_soc_dapm_value_mux] = 9,
88 [snd_soc_dapm_aif_in] = 10,
89 [snd_soc_dapm_aif_out] = 10,
90 [snd_soc_dapm_dai] = 10,
91 [snd_soc_dapm_regulator_supply] = 11,
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 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
123 {
124 return !list_empty(&w->dirty);
125 }
126
127 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
128 {
129 if (!dapm_dirty_widget(w)) {
130 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
131 w->name, reason);
132 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
133 }
134 }
135 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
136
137 /* create a new dapm widget */
138 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
139 const struct snd_soc_dapm_widget *_widget)
140 {
141 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
142 }
143
144 /* get snd_card from DAPM context */
145 static inline struct snd_card *dapm_get_snd_card(
146 struct snd_soc_dapm_context *dapm)
147 {
148 if (dapm->codec)
149 return dapm->codec->card->snd_card;
150 else if (dapm->platform)
151 return dapm->platform->card->snd_card;
152 else
153 BUG();
154
155 /* unreachable */
156 return NULL;
157 }
158
159 /* get soc_card from DAPM context */
160 static inline struct snd_soc_card *dapm_get_soc_card(
161 struct snd_soc_dapm_context *dapm)
162 {
163 if (dapm->codec)
164 return dapm->codec->card;
165 else if (dapm->platform)
166 return dapm->platform->card;
167 else
168 BUG();
169
170 /* unreachable */
171 return NULL;
172 }
173
174 static void dapm_reset(struct snd_soc_card *card)
175 {
176 struct snd_soc_dapm_widget *w;
177
178 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
179
180 list_for_each_entry(w, &card->widgets, list) {
181 w->power_checked = false;
182 w->inputs = -1;
183 w->outputs = -1;
184 }
185 }
186
187 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
188 {
189 if (w->codec)
190 return snd_soc_read(w->codec, reg);
191 else if (w->platform)
192 return snd_soc_platform_read(w->platform, reg);
193
194 dev_err(w->dapm->dev, "no valid widget read method\n");
195 return -1;
196 }
197
198 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
199 {
200 if (w->codec)
201 return snd_soc_write(w->codec, reg, val);
202 else if (w->platform)
203 return snd_soc_platform_write(w->platform, reg, val);
204
205 dev_err(w->dapm->dev, "no valid widget write method\n");
206 return -1;
207 }
208
209 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
210 unsigned short reg, unsigned int mask, unsigned int value)
211 {
212 bool change;
213 unsigned int old, new;
214 int ret;
215
216 if (w->codec && w->codec->using_regmap) {
217 ret = regmap_update_bits_check(w->codec->control_data,
218 reg, mask, value, &change);
219 if (ret != 0)
220 return ret;
221 } else {
222 ret = soc_widget_read(w, reg);
223 if (ret < 0)
224 return ret;
225
226 old = ret;
227 new = (old & ~mask) | (value & mask);
228 change = old != new;
229 if (change) {
230 ret = soc_widget_write(w, reg, new);
231 if (ret < 0)
232 return ret;
233 }
234 }
235
236 return change;
237 }
238
239 /**
240 * snd_soc_dapm_set_bias_level - set the bias level for the system
241 * @dapm: DAPM context
242 * @level: level to configure
243 *
244 * Configure the bias (power) levels for the SoC audio device.
245 *
246 * Returns 0 for success else error.
247 */
248 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
249 enum snd_soc_bias_level level)
250 {
251 struct snd_soc_card *card = dapm->card;
252 int ret = 0;
253
254 trace_snd_soc_bias_level_start(card, level);
255
256 if (card && card->set_bias_level)
257 ret = card->set_bias_level(card, dapm, level);
258 if (ret != 0)
259 goto out;
260
261 if (dapm->codec) {
262 if (dapm->codec->driver->set_bias_level)
263 ret = dapm->codec->driver->set_bias_level(dapm->codec,
264 level);
265 else
266 dapm->bias_level = level;
267 }
268 if (ret != 0)
269 goto out;
270
271 if (card && card->set_bias_level_post)
272 ret = card->set_bias_level_post(card, dapm, level);
273 out:
274 trace_snd_soc_bias_level_done(card, level);
275
276 return ret;
277 }
278
279 /* set up initial codec paths */
280 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
281 struct snd_soc_dapm_path *p, int i)
282 {
283 switch (w->id) {
284 case snd_soc_dapm_switch:
285 case snd_soc_dapm_mixer:
286 case snd_soc_dapm_mixer_named_ctl: {
287 int val;
288 struct soc_mixer_control *mc = (struct soc_mixer_control *)
289 w->kcontrol_news[i].private_value;
290 unsigned int reg = mc->reg;
291 unsigned int shift = mc->shift;
292 int max = mc->max;
293 unsigned int mask = (1 << fls(max)) - 1;
294 unsigned int invert = mc->invert;
295
296 val = soc_widget_read(w, reg);
297 val = (val >> shift) & mask;
298
299 if ((invert && !val) || (!invert && val))
300 p->connect = 1;
301 else
302 p->connect = 0;
303 }
304 break;
305 case snd_soc_dapm_mux: {
306 struct soc_enum *e = (struct soc_enum *)
307 w->kcontrol_news[i].private_value;
308 int val, item, bitmask;
309
310 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
311 ;
312 val = soc_widget_read(w, e->reg);
313 item = (val >> e->shift_l) & (bitmask - 1);
314
315 p->connect = 0;
316 for (i = 0; i < e->max; i++) {
317 if (!(strcmp(p->name, e->texts[i])) && item == i)
318 p->connect = 1;
319 }
320 }
321 break;
322 case snd_soc_dapm_virt_mux: {
323 struct soc_enum *e = (struct soc_enum *)
324 w->kcontrol_news[i].private_value;
325
326 p->connect = 0;
327 /* since a virtual mux has no backing registers to
328 * decide which path to connect, it will try to match
329 * with the first enumeration. This is to ensure
330 * that the default mux choice (the first) will be
331 * correctly powered up during initialization.
332 */
333 if (!strcmp(p->name, e->texts[0]))
334 p->connect = 1;
335 }
336 break;
337 case snd_soc_dapm_value_mux: {
338 struct soc_enum *e = (struct soc_enum *)
339 w->kcontrol_news[i].private_value;
340 int val, item;
341
342 val = soc_widget_read(w, e->reg);
343 val = (val >> e->shift_l) & e->mask;
344 for (item = 0; item < e->max; item++) {
345 if (val == e->values[item])
346 break;
347 }
348
349 p->connect = 0;
350 for (i = 0; i < e->max; i++) {
351 if (!(strcmp(p->name, e->texts[i])) && item == i)
352 p->connect = 1;
353 }
354 }
355 break;
356 /* does not affect routing - always connected */
357 case snd_soc_dapm_pga:
358 case snd_soc_dapm_out_drv:
359 case snd_soc_dapm_output:
360 case snd_soc_dapm_adc:
361 case snd_soc_dapm_input:
362 case snd_soc_dapm_siggen:
363 case snd_soc_dapm_dac:
364 case snd_soc_dapm_micbias:
365 case snd_soc_dapm_vmid:
366 case snd_soc_dapm_supply:
367 case snd_soc_dapm_regulator_supply:
368 case snd_soc_dapm_aif_in:
369 case snd_soc_dapm_aif_out:
370 case snd_soc_dapm_dai:
371 case snd_soc_dapm_hp:
372 case snd_soc_dapm_mic:
373 case snd_soc_dapm_spk:
374 case snd_soc_dapm_line:
375 p->connect = 1;
376 break;
377 /* does affect routing - dynamically connected */
378 case snd_soc_dapm_pre:
379 case snd_soc_dapm_post:
380 p->connect = 0;
381 break;
382 }
383 }
384
385 /* connect mux widget to its interconnecting audio paths */
386 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
387 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
388 struct snd_soc_dapm_path *path, const char *control_name,
389 const struct snd_kcontrol_new *kcontrol)
390 {
391 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
392 int i;
393
394 for (i = 0; i < e->max; i++) {
395 if (!(strcmp(control_name, e->texts[i]))) {
396 list_add(&path->list, &dapm->card->paths);
397 list_add(&path->list_sink, &dest->sources);
398 list_add(&path->list_source, &src->sinks);
399 path->name = (char*)e->texts[i];
400 dapm_set_path_status(dest, path, 0);
401 return 0;
402 }
403 }
404
405 return -ENODEV;
406 }
407
408 /* connect mixer widget to its interconnecting audio paths */
409 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
410 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
411 struct snd_soc_dapm_path *path, const char *control_name)
412 {
413 int i;
414
415 /* search for mixer kcontrol */
416 for (i = 0; i < dest->num_kcontrols; i++) {
417 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
418 list_add(&path->list, &dapm->card->paths);
419 list_add(&path->list_sink, &dest->sources);
420 list_add(&path->list_source, &src->sinks);
421 path->name = dest->kcontrol_news[i].name;
422 dapm_set_path_status(dest, path, i);
423 return 0;
424 }
425 }
426 return -ENODEV;
427 }
428
429 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
430 struct snd_soc_dapm_widget *kcontrolw,
431 const struct snd_kcontrol_new *kcontrol_new,
432 struct snd_kcontrol **kcontrol)
433 {
434 struct snd_soc_dapm_widget *w;
435 int i;
436
437 *kcontrol = NULL;
438
439 list_for_each_entry(w, &dapm->card->widgets, list) {
440 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
441 continue;
442 for (i = 0; i < w->num_kcontrols; i++) {
443 if (&w->kcontrol_news[i] == kcontrol_new) {
444 if (w->kcontrols)
445 *kcontrol = w->kcontrols[i];
446 return 1;
447 }
448 }
449 }
450
451 return 0;
452 }
453
454 /* create new dapm mixer control */
455 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
456 {
457 struct snd_soc_dapm_context *dapm = w->dapm;
458 int i, ret = 0;
459 size_t name_len, prefix_len;
460 struct snd_soc_dapm_path *path;
461 struct snd_card *card = dapm->card->snd_card;
462 const char *prefix;
463 struct snd_soc_dapm_widget_list *wlist;
464 size_t wlistsize;
465
466 if (dapm->codec)
467 prefix = dapm->codec->name_prefix;
468 else
469 prefix = NULL;
470
471 if (prefix)
472 prefix_len = strlen(prefix) + 1;
473 else
474 prefix_len = 0;
475
476 /* add kcontrol */
477 for (i = 0; i < w->num_kcontrols; i++) {
478
479 /* match name */
480 list_for_each_entry(path, &w->sources, list_sink) {
481
482 /* mixer/mux paths name must match control name */
483 if (path->name != (char *)w->kcontrol_news[i].name)
484 continue;
485
486 if (w->kcontrols[i]) {
487 path->kcontrol = w->kcontrols[i];
488 continue;
489 }
490
491 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
492 sizeof(struct snd_soc_dapm_widget *),
493 wlist = kzalloc(wlistsize, GFP_KERNEL);
494 if (wlist == NULL) {
495 dev_err(dapm->dev,
496 "asoc: can't allocate widget list for %s\n",
497 w->name);
498 return -ENOMEM;
499 }
500 wlist->num_widgets = 1;
501 wlist->widgets[0] = w;
502
503 /* add dapm control with long name.
504 * for dapm_mixer this is the concatenation of the
505 * mixer and kcontrol name.
506 * for dapm_mixer_named_ctl this is simply the
507 * kcontrol name.
508 */
509 name_len = strlen(w->kcontrol_news[i].name) + 1;
510 if (w->id != snd_soc_dapm_mixer_named_ctl)
511 name_len += 1 + strlen(w->name);
512
513 path->long_name = kmalloc(name_len, GFP_KERNEL);
514
515 if (path->long_name == NULL) {
516 kfree(wlist);
517 return -ENOMEM;
518 }
519
520 switch (w->id) {
521 default:
522 /* The control will get a prefix from
523 * the control creation process but
524 * we're also using the same prefix
525 * for widgets so cut the prefix off
526 * the front of the widget name.
527 */
528 snprintf((char *)path->long_name, name_len,
529 "%s %s", w->name + prefix_len,
530 w->kcontrol_news[i].name);
531 break;
532 case snd_soc_dapm_mixer_named_ctl:
533 snprintf((char *)path->long_name, name_len,
534 "%s", w->kcontrol_news[i].name);
535 break;
536 }
537
538 ((char *)path->long_name)[name_len - 1] = '\0';
539
540 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
541 wlist, path->long_name,
542 prefix);
543 ret = snd_ctl_add(card, path->kcontrol);
544 if (ret < 0) {
545 dev_err(dapm->dev,
546 "asoc: failed to add dapm kcontrol %s: %d\n",
547 path->long_name, ret);
548 kfree(wlist);
549 kfree(path->long_name);
550 path->long_name = NULL;
551 return ret;
552 }
553 w->kcontrols[i] = path->kcontrol;
554 }
555 }
556 return ret;
557 }
558
559 /* create new dapm mux control */
560 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
561 {
562 struct snd_soc_dapm_context *dapm = w->dapm;
563 struct snd_soc_dapm_path *path = NULL;
564 struct snd_kcontrol *kcontrol;
565 struct snd_card *card = dapm->card->snd_card;
566 const char *prefix;
567 size_t prefix_len;
568 int ret;
569 struct snd_soc_dapm_widget_list *wlist;
570 int shared, wlistentries;
571 size_t wlistsize;
572 const char *name;
573
574 if (w->num_kcontrols != 1) {
575 dev_err(dapm->dev,
576 "asoc: mux %s has incorrect number of controls\n",
577 w->name);
578 return -EINVAL;
579 }
580
581 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
582 &kcontrol);
583 if (kcontrol) {
584 wlist = kcontrol->private_data;
585 wlistentries = wlist->num_widgets + 1;
586 } else {
587 wlist = NULL;
588 wlistentries = 1;
589 }
590 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
591 wlistentries * sizeof(struct snd_soc_dapm_widget *),
592 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
593 if (wlist == NULL) {
594 dev_err(dapm->dev,
595 "asoc: can't allocate widget list for %s\n", w->name);
596 return -ENOMEM;
597 }
598 wlist->num_widgets = wlistentries;
599 wlist->widgets[wlistentries - 1] = w;
600
601 if (!kcontrol) {
602 if (dapm->codec)
603 prefix = dapm->codec->name_prefix;
604 else
605 prefix = NULL;
606
607 if (shared) {
608 name = w->kcontrol_news[0].name;
609 prefix_len = 0;
610 } else {
611 name = w->name;
612 if (prefix)
613 prefix_len = strlen(prefix) + 1;
614 else
615 prefix_len = 0;
616 }
617
618 /*
619 * The control will get a prefix from the control creation
620 * process but we're also using the same prefix for widgets so
621 * cut the prefix off the front of the widget name.
622 */
623 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
624 name + prefix_len, prefix);
625 ret = snd_ctl_add(card, kcontrol);
626 if (ret < 0) {
627 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
628 w->name, ret);
629 kfree(wlist);
630 return ret;
631 }
632 }
633
634 kcontrol->private_data = wlist;
635
636 w->kcontrols[0] = kcontrol;
637
638 list_for_each_entry(path, &w->sources, list_sink)
639 path->kcontrol = kcontrol;
640
641 return 0;
642 }
643
644 /* create new dapm volume control */
645 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
646 {
647 if (w->num_kcontrols)
648 dev_err(w->dapm->dev,
649 "asoc: PGA controls not supported: '%s'\n", w->name);
650
651 return 0;
652 }
653
654 /* reset 'walked' bit for each dapm path */
655 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
656 {
657 struct snd_soc_dapm_path *p;
658
659 list_for_each_entry(p, &dapm->card->paths, list)
660 p->walked = 0;
661 }
662
663 /* We implement power down on suspend by checking the power state of
664 * the ALSA card - when we are suspending the ALSA state for the card
665 * is set to D3.
666 */
667 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
668 {
669 int level = snd_power_get_state(widget->dapm->card->snd_card);
670
671 switch (level) {
672 case SNDRV_CTL_POWER_D3hot:
673 case SNDRV_CTL_POWER_D3cold:
674 if (widget->ignore_suspend)
675 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
676 widget->name);
677 return widget->ignore_suspend;
678 default:
679 return 1;
680 }
681 }
682
683 /*
684 * Recursively check for a completed path to an active or physically connected
685 * output widget. Returns number of complete paths.
686 */
687 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
688 {
689 struct snd_soc_dapm_path *path;
690 int con = 0;
691
692 if (widget->outputs >= 0)
693 return widget->outputs;
694
695 DAPM_UPDATE_STAT(widget, path_checks);
696
697 switch (widget->id) {
698 case snd_soc_dapm_supply:
699 case snd_soc_dapm_regulator_supply:
700 return 0;
701 default:
702 break;
703 }
704
705 switch (widget->id) {
706 case snd_soc_dapm_adc:
707 case snd_soc_dapm_aif_out:
708 case snd_soc_dapm_dai:
709 if (widget->active) {
710 widget->outputs = snd_soc_dapm_suspend_check(widget);
711 return widget->outputs;
712 }
713 default:
714 break;
715 }
716
717 if (widget->connected) {
718 /* connected pin ? */
719 if (widget->id == snd_soc_dapm_output && !widget->ext) {
720 widget->outputs = snd_soc_dapm_suspend_check(widget);
721 return widget->outputs;
722 }
723
724 /* connected jack or spk ? */
725 if (widget->id == snd_soc_dapm_hp ||
726 widget->id == snd_soc_dapm_spk ||
727 (widget->id == snd_soc_dapm_line &&
728 !list_empty(&widget->sources))) {
729 widget->outputs = snd_soc_dapm_suspend_check(widget);
730 return widget->outputs;
731 }
732 }
733
734 list_for_each_entry(path, &widget->sinks, list_source) {
735 DAPM_UPDATE_STAT(widget, neighbour_checks);
736
737 if (path->weak)
738 continue;
739
740 if (path->walked)
741 continue;
742
743 if (path->sink && path->connect) {
744 path->walked = 1;
745 con += is_connected_output_ep(path->sink);
746 }
747 }
748
749 widget->outputs = con;
750
751 return con;
752 }
753
754 /*
755 * Recursively check for a completed path to an active or physically connected
756 * input widget. Returns number of complete paths.
757 */
758 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
759 {
760 struct snd_soc_dapm_path *path;
761 int con = 0;
762
763 if (widget->inputs >= 0)
764 return widget->inputs;
765
766 DAPM_UPDATE_STAT(widget, path_checks);
767
768 switch (widget->id) {
769 case snd_soc_dapm_supply:
770 case snd_soc_dapm_regulator_supply:
771 return 0;
772 default:
773 break;
774 }
775
776 /* active stream ? */
777 switch (widget->id) {
778 case snd_soc_dapm_dac:
779 case snd_soc_dapm_aif_in:
780 case snd_soc_dapm_dai:
781 if (widget->active) {
782 widget->inputs = snd_soc_dapm_suspend_check(widget);
783 return widget->inputs;
784 }
785 default:
786 break;
787 }
788
789 if (widget->connected) {
790 /* connected pin ? */
791 if (widget->id == snd_soc_dapm_input && !widget->ext) {
792 widget->inputs = snd_soc_dapm_suspend_check(widget);
793 return widget->inputs;
794 }
795
796 /* connected VMID/Bias for lower pops */
797 if (widget->id == snd_soc_dapm_vmid) {
798 widget->inputs = snd_soc_dapm_suspend_check(widget);
799 return widget->inputs;
800 }
801
802 /* connected jack ? */
803 if (widget->id == snd_soc_dapm_mic ||
804 (widget->id == snd_soc_dapm_line &&
805 !list_empty(&widget->sinks))) {
806 widget->inputs = snd_soc_dapm_suspend_check(widget);
807 return widget->inputs;
808 }
809
810 /* signal generator */
811 if (widget->id == snd_soc_dapm_siggen) {
812 widget->inputs = snd_soc_dapm_suspend_check(widget);
813 return widget->inputs;
814 }
815 }
816
817 list_for_each_entry(path, &widget->sources, list_sink) {
818 DAPM_UPDATE_STAT(widget, neighbour_checks);
819
820 if (path->weak)
821 continue;
822
823 if (path->walked)
824 continue;
825
826 if (path->source && path->connect) {
827 path->walked = 1;
828 con += is_connected_input_ep(path->source);
829 }
830 }
831
832 widget->inputs = con;
833
834 return con;
835 }
836
837 /*
838 * Handler for generic register modifier widget.
839 */
840 int dapm_reg_event(struct snd_soc_dapm_widget *w,
841 struct snd_kcontrol *kcontrol, int event)
842 {
843 unsigned int val;
844
845 if (SND_SOC_DAPM_EVENT_ON(event))
846 val = w->on_val;
847 else
848 val = w->off_val;
849
850 soc_widget_update_bits(w, -(w->reg + 1),
851 w->mask << w->shift, val << w->shift);
852
853 return 0;
854 }
855 EXPORT_SYMBOL_GPL(dapm_reg_event);
856
857 /*
858 * Handler for regulator supply widget.
859 */
860 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
861 struct snd_kcontrol *kcontrol, int event)
862 {
863 if (SND_SOC_DAPM_EVENT_ON(event))
864 return regulator_enable(w->priv);
865 else
866 return regulator_disable_deferred(w->priv, w->shift);
867 }
868 EXPORT_SYMBOL_GPL(dapm_regulator_event);
869
870 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
871 {
872 if (w->power_checked)
873 return w->new_power;
874
875 if (w->force)
876 w->new_power = 1;
877 else
878 w->new_power = w->power_check(w);
879
880 w->power_checked = true;
881
882 return w->new_power;
883 }
884
885 /* Generic check to see if a widget should be powered.
886 */
887 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
888 {
889 int in, out;
890
891 DAPM_UPDATE_STAT(w, power_checks);
892
893 in = is_connected_input_ep(w);
894 dapm_clear_walk(w->dapm);
895 out = is_connected_output_ep(w);
896 dapm_clear_walk(w->dapm);
897 return out != 0 && in != 0;
898 }
899
900 static int dapm_dai_check_power(struct snd_soc_dapm_widget *w)
901 {
902 DAPM_UPDATE_STAT(w, power_checks);
903
904 return w->active;
905 }
906
907 /* Check to see if an ADC has power */
908 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
909 {
910 int in;
911
912 DAPM_UPDATE_STAT(w, power_checks);
913
914 if (w->active) {
915 in = is_connected_input_ep(w);
916 dapm_clear_walk(w->dapm);
917 return in != 0;
918 } else {
919 return dapm_generic_check_power(w);
920 }
921 }
922
923 /* Check to see if a DAC has power */
924 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
925 {
926 int out;
927
928 DAPM_UPDATE_STAT(w, power_checks);
929
930 if (w->active) {
931 out = is_connected_output_ep(w);
932 dapm_clear_walk(w->dapm);
933 return out != 0;
934 } else {
935 return dapm_generic_check_power(w);
936 }
937 }
938
939 /* Check to see if a power supply is needed */
940 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
941 {
942 struct snd_soc_dapm_path *path;
943
944 DAPM_UPDATE_STAT(w, power_checks);
945
946 /* Check if one of our outputs is connected */
947 list_for_each_entry(path, &w->sinks, list_source) {
948 DAPM_UPDATE_STAT(w, neighbour_checks);
949
950 if (path->weak)
951 continue;
952
953 if (path->connected &&
954 !path->connected(path->source, path->sink))
955 continue;
956
957 if (!path->sink)
958 continue;
959
960 if (dapm_widget_power_check(path->sink))
961 return 1;
962 }
963
964 dapm_clear_walk(w->dapm);
965
966 return 0;
967 }
968
969 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
970 {
971 return 1;
972 }
973
974 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
975 struct snd_soc_dapm_widget *b,
976 bool power_up)
977 {
978 int *sort;
979
980 if (power_up)
981 sort = dapm_up_seq;
982 else
983 sort = dapm_down_seq;
984
985 if (sort[a->id] != sort[b->id])
986 return sort[a->id] - sort[b->id];
987 if (a->subseq != b->subseq) {
988 if (power_up)
989 return a->subseq - b->subseq;
990 else
991 return b->subseq - a->subseq;
992 }
993 if (a->reg != b->reg)
994 return a->reg - b->reg;
995 if (a->dapm != b->dapm)
996 return (unsigned long)a->dapm - (unsigned long)b->dapm;
997
998 return 0;
999 }
1000
1001 /* Insert a widget in order into a DAPM power sequence. */
1002 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1003 struct list_head *list,
1004 bool power_up)
1005 {
1006 struct snd_soc_dapm_widget *w;
1007
1008 list_for_each_entry(w, list, power_list)
1009 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1010 list_add_tail(&new_widget->power_list, &w->power_list);
1011 return;
1012 }
1013
1014 list_add_tail(&new_widget->power_list, list);
1015 }
1016
1017 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
1018 struct snd_soc_dapm_widget *w, int event)
1019 {
1020 struct snd_soc_card *card = dapm->card;
1021 const char *ev_name;
1022 int power, ret;
1023
1024 switch (event) {
1025 case SND_SOC_DAPM_PRE_PMU:
1026 ev_name = "PRE_PMU";
1027 power = 1;
1028 break;
1029 case SND_SOC_DAPM_POST_PMU:
1030 ev_name = "POST_PMU";
1031 power = 1;
1032 break;
1033 case SND_SOC_DAPM_PRE_PMD:
1034 ev_name = "PRE_PMD";
1035 power = 0;
1036 break;
1037 case SND_SOC_DAPM_POST_PMD:
1038 ev_name = "POST_PMD";
1039 power = 0;
1040 break;
1041 default:
1042 BUG();
1043 return;
1044 }
1045
1046 if (w->power != power)
1047 return;
1048
1049 if (w->event && (w->event_flags & event)) {
1050 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
1051 w->name, ev_name);
1052 trace_snd_soc_dapm_widget_event_start(w, event);
1053 ret = w->event(w, NULL, event);
1054 trace_snd_soc_dapm_widget_event_done(w, event);
1055 if (ret < 0)
1056 pr_err("%s: %s event failed: %d\n",
1057 ev_name, w->name, ret);
1058 }
1059 }
1060
1061 /* Apply the coalesced changes from a DAPM sequence */
1062 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
1063 struct list_head *pending)
1064 {
1065 struct snd_soc_card *card = dapm->card;
1066 struct snd_soc_dapm_widget *w;
1067 int reg, power;
1068 unsigned int value = 0;
1069 unsigned int mask = 0;
1070 unsigned int cur_mask;
1071
1072 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1073 power_list)->reg;
1074
1075 list_for_each_entry(w, pending, power_list) {
1076 cur_mask = 1 << w->shift;
1077 BUG_ON(reg != w->reg);
1078
1079 if (w->invert)
1080 power = !w->power;
1081 else
1082 power = w->power;
1083
1084 mask |= cur_mask;
1085 if (power)
1086 value |= cur_mask;
1087
1088 pop_dbg(dapm->dev, card->pop_time,
1089 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1090 w->name, reg, value, mask);
1091
1092 /* Check for events */
1093 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1094 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1095 }
1096
1097 if (reg >= 0) {
1098 /* Any widget will do, they should all be updating the
1099 * same register.
1100 */
1101 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1102 power_list);
1103
1104 pop_dbg(dapm->dev, card->pop_time,
1105 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1106 value, mask, reg, card->pop_time);
1107 pop_wait(card->pop_time);
1108 soc_widget_update_bits(w, reg, mask, value);
1109 }
1110
1111 list_for_each_entry(w, pending, power_list) {
1112 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1113 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1114 }
1115 }
1116
1117 /* Apply a DAPM power sequence.
1118 *
1119 * We walk over a pre-sorted list of widgets to apply power to. In
1120 * order to minimise the number of writes to the device required
1121 * multiple widgets will be updated in a single write where possible.
1122 * Currently anything that requires more than a single write is not
1123 * handled.
1124 */
1125 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1126 struct list_head *list, int event, bool power_up)
1127 {
1128 struct snd_soc_dapm_widget *w, *n;
1129 LIST_HEAD(pending);
1130 int cur_sort = -1;
1131 int cur_subseq = -1;
1132 int cur_reg = SND_SOC_NOPM;
1133 struct snd_soc_dapm_context *cur_dapm = NULL;
1134 int ret, i;
1135 int *sort;
1136
1137 if (power_up)
1138 sort = dapm_up_seq;
1139 else
1140 sort = dapm_down_seq;
1141
1142 list_for_each_entry_safe(w, n, list, power_list) {
1143 ret = 0;
1144
1145 /* Do we need to apply any queued changes? */
1146 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1147 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1148 if (!list_empty(&pending))
1149 dapm_seq_run_coalesced(cur_dapm, &pending);
1150
1151 if (cur_dapm && cur_dapm->seq_notifier) {
1152 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1153 if (sort[i] == cur_sort)
1154 cur_dapm->seq_notifier(cur_dapm,
1155 i,
1156 cur_subseq);
1157 }
1158
1159 INIT_LIST_HEAD(&pending);
1160 cur_sort = -1;
1161 cur_subseq = INT_MIN;
1162 cur_reg = SND_SOC_NOPM;
1163 cur_dapm = NULL;
1164 }
1165
1166 switch (w->id) {
1167 case snd_soc_dapm_pre:
1168 if (!w->event)
1169 list_for_each_entry_safe_continue(w, n, list,
1170 power_list);
1171
1172 if (event == SND_SOC_DAPM_STREAM_START)
1173 ret = w->event(w,
1174 NULL, SND_SOC_DAPM_PRE_PMU);
1175 else if (event == SND_SOC_DAPM_STREAM_STOP)
1176 ret = w->event(w,
1177 NULL, SND_SOC_DAPM_PRE_PMD);
1178 break;
1179
1180 case snd_soc_dapm_post:
1181 if (!w->event)
1182 list_for_each_entry_safe_continue(w, n, list,
1183 power_list);
1184
1185 if (event == SND_SOC_DAPM_STREAM_START)
1186 ret = w->event(w,
1187 NULL, SND_SOC_DAPM_POST_PMU);
1188 else if (event == SND_SOC_DAPM_STREAM_STOP)
1189 ret = w->event(w,
1190 NULL, SND_SOC_DAPM_POST_PMD);
1191 break;
1192
1193 default:
1194 /* Queue it up for application */
1195 cur_sort = sort[w->id];
1196 cur_subseq = w->subseq;
1197 cur_reg = w->reg;
1198 cur_dapm = w->dapm;
1199 list_move(&w->power_list, &pending);
1200 break;
1201 }
1202
1203 if (ret < 0)
1204 dev_err(w->dapm->dev,
1205 "Failed to apply widget power: %d\n", ret);
1206 }
1207
1208 if (!list_empty(&pending))
1209 dapm_seq_run_coalesced(cur_dapm, &pending);
1210
1211 if (cur_dapm && cur_dapm->seq_notifier) {
1212 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1213 if (sort[i] == cur_sort)
1214 cur_dapm->seq_notifier(cur_dapm,
1215 i, cur_subseq);
1216 }
1217 }
1218
1219 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1220 {
1221 struct snd_soc_dapm_update *update = dapm->update;
1222 struct snd_soc_dapm_widget *w;
1223 int ret;
1224
1225 if (!update)
1226 return;
1227
1228 w = update->widget;
1229
1230 if (w->event &&
1231 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1232 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1233 if (ret != 0)
1234 pr_err("%s DAPM pre-event failed: %d\n",
1235 w->name, ret);
1236 }
1237
1238 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1239 update->val);
1240 if (ret < 0)
1241 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1242
1243 if (w->event &&
1244 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1245 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1246 if (ret != 0)
1247 pr_err("%s DAPM post-event failed: %d\n",
1248 w->name, ret);
1249 }
1250 }
1251
1252 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1253 * they're changing state.
1254 */
1255 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1256 {
1257 struct snd_soc_dapm_context *d = data;
1258 int ret;
1259
1260 /* If we're off and we're not supposed to be go into STANDBY */
1261 if (d->bias_level == SND_SOC_BIAS_OFF &&
1262 d->target_bias_level != SND_SOC_BIAS_OFF) {
1263 if (d->dev)
1264 pm_runtime_get_sync(d->dev);
1265
1266 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1267 if (ret != 0)
1268 dev_err(d->dev,
1269 "Failed to turn on bias: %d\n", ret);
1270 }
1271
1272 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1273 if (d->bias_level != d->target_bias_level) {
1274 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1275 if (ret != 0)
1276 dev_err(d->dev,
1277 "Failed to prepare bias: %d\n", ret);
1278 }
1279 }
1280
1281 /* Async callback run prior to DAPM sequences - brings to their final
1282 * state.
1283 */
1284 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1285 {
1286 struct snd_soc_dapm_context *d = data;
1287 int ret;
1288
1289 /* If we just powered the last thing off drop to standby bias */
1290 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1291 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1292 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1293 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1294 if (ret != 0)
1295 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1296 ret);
1297 }
1298
1299 /* If we're in standby and can support bias off then do that */
1300 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1301 d->target_bias_level == SND_SOC_BIAS_OFF) {
1302 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1303 if (ret != 0)
1304 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1305
1306 if (d->dev)
1307 pm_runtime_put(d->dev);
1308 }
1309
1310 /* If we just powered up then move to active bias */
1311 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1312 d->target_bias_level == SND_SOC_BIAS_ON) {
1313 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1314 if (ret != 0)
1315 dev_err(d->dev, "Failed to apply active bias: %d\n",
1316 ret);
1317 }
1318 }
1319
1320 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1321 bool power, bool connect)
1322 {
1323 /* If a connection is being made or broken then that update
1324 * will have marked the peer dirty, otherwise the widgets are
1325 * not connected and this update has no impact. */
1326 if (!connect)
1327 return;
1328
1329 /* If the peer is already in the state we're moving to then we
1330 * won't have an impact on it. */
1331 if (power != peer->power)
1332 dapm_mark_dirty(peer, "peer state change");
1333 }
1334
1335 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1336 struct list_head *up_list,
1337 struct list_head *down_list)
1338 {
1339 struct snd_soc_dapm_path *path;
1340
1341 if (w->power == power)
1342 return;
1343
1344 trace_snd_soc_dapm_widget_power(w, power);
1345
1346 /* If we changed our power state perhaps our neigbours changed
1347 * also.
1348 */
1349 list_for_each_entry(path, &w->sources, list_sink) {
1350 if (path->source) {
1351 dapm_widget_set_peer_power(path->source, power,
1352 path->connect);
1353 }
1354 }
1355 switch (w->id) {
1356 case snd_soc_dapm_supply:
1357 case snd_soc_dapm_regulator_supply:
1358 /* Supplies can't affect their outputs, only their inputs */
1359 break;
1360 default:
1361 list_for_each_entry(path, &w->sinks, list_source) {
1362 if (path->sink) {
1363 dapm_widget_set_peer_power(path->sink, power,
1364 path->connect);
1365 }
1366 }
1367 break;
1368 }
1369
1370 if (power)
1371 dapm_seq_insert(w, up_list, true);
1372 else
1373 dapm_seq_insert(w, down_list, false);
1374
1375 w->power = power;
1376 }
1377
1378 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1379 struct list_head *up_list,
1380 struct list_head *down_list)
1381 {
1382 int power;
1383
1384 switch (w->id) {
1385 case snd_soc_dapm_pre:
1386 dapm_seq_insert(w, down_list, false);
1387 break;
1388 case snd_soc_dapm_post:
1389 dapm_seq_insert(w, up_list, true);
1390 break;
1391
1392 default:
1393 power = dapm_widget_power_check(w);
1394
1395 dapm_widget_set_power(w, power, up_list, down_list);
1396 break;
1397 }
1398 }
1399
1400 /*
1401 * Scan each dapm widget for complete audio path.
1402 * A complete path is a route that has valid endpoints i.e.:-
1403 *
1404 * o DAC to output pin.
1405 * o Input Pin to ADC.
1406 * o Input pin to Output pin (bypass, sidetone)
1407 * o DAC to ADC (loopback).
1408 */
1409 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1410 {
1411 struct snd_soc_card *card = dapm->card;
1412 struct snd_soc_dapm_widget *w;
1413 struct snd_soc_dapm_context *d;
1414 LIST_HEAD(up_list);
1415 LIST_HEAD(down_list);
1416 LIST_HEAD(async_domain);
1417 enum snd_soc_bias_level bias;
1418
1419 trace_snd_soc_dapm_start(card);
1420
1421 list_for_each_entry(d, &card->dapm_list, list) {
1422 if (d->n_widgets || d->codec == NULL) {
1423 if (d->idle_bias_off)
1424 d->target_bias_level = SND_SOC_BIAS_OFF;
1425 else
1426 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1427 }
1428 }
1429
1430 dapm_reset(card);
1431
1432 /* Check which widgets we need to power and store them in
1433 * lists indicating if they should be powered up or down. We
1434 * only check widgets that have been flagged as dirty but note
1435 * that new widgets may be added to the dirty list while we
1436 * iterate.
1437 */
1438 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1439 dapm_power_one_widget(w, &up_list, &down_list);
1440 }
1441
1442 list_for_each_entry(w, &card->widgets, list) {
1443 list_del_init(&w->dirty);
1444
1445 if (w->power) {
1446 d = w->dapm;
1447
1448 /* Supplies and micbiases only bring the
1449 * context up to STANDBY as unless something
1450 * else is active and passing audio they
1451 * generally don't require full power. Signal
1452 * generators are virtual pins and have no
1453 * power impact themselves.
1454 */
1455 switch (w->id) {
1456 case snd_soc_dapm_siggen:
1457 break;
1458 case snd_soc_dapm_supply:
1459 case snd_soc_dapm_regulator_supply:
1460 case snd_soc_dapm_micbias:
1461 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1462 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1463 break;
1464 default:
1465 d->target_bias_level = SND_SOC_BIAS_ON;
1466 break;
1467 }
1468 }
1469
1470 }
1471
1472 /* If there are no DAPM widgets then try to figure out power from the
1473 * event type.
1474 */
1475 if (!dapm->n_widgets) {
1476 switch (event) {
1477 case SND_SOC_DAPM_STREAM_START:
1478 case SND_SOC_DAPM_STREAM_RESUME:
1479 dapm->target_bias_level = SND_SOC_BIAS_ON;
1480 break;
1481 case SND_SOC_DAPM_STREAM_STOP:
1482 if (dapm->codec && dapm->codec->active)
1483 dapm->target_bias_level = SND_SOC_BIAS_ON;
1484 else
1485 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1486 break;
1487 case SND_SOC_DAPM_STREAM_SUSPEND:
1488 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1489 break;
1490 case SND_SOC_DAPM_STREAM_NOP:
1491 dapm->target_bias_level = dapm->bias_level;
1492 break;
1493 default:
1494 break;
1495 }
1496 }
1497
1498 /* Force all contexts in the card to the same bias state if
1499 * they're not ground referenced.
1500 */
1501 bias = SND_SOC_BIAS_OFF;
1502 list_for_each_entry(d, &card->dapm_list, list)
1503 if (d->target_bias_level > bias)
1504 bias = d->target_bias_level;
1505 list_for_each_entry(d, &card->dapm_list, list)
1506 if (!d->idle_bias_off)
1507 d->target_bias_level = bias;
1508
1509 trace_snd_soc_dapm_walk_done(card);
1510
1511 /* Run all the bias changes in parallel */
1512 list_for_each_entry(d, &dapm->card->dapm_list, list)
1513 async_schedule_domain(dapm_pre_sequence_async, d,
1514 &async_domain);
1515 async_synchronize_full_domain(&async_domain);
1516
1517 /* Power down widgets first; try to avoid amplifying pops. */
1518 dapm_seq_run(dapm, &down_list, event, false);
1519
1520 dapm_widget_update(dapm);
1521
1522 /* Now power up. */
1523 dapm_seq_run(dapm, &up_list, event, true);
1524
1525 /* Run all the bias changes in parallel */
1526 list_for_each_entry(d, &dapm->card->dapm_list, list)
1527 async_schedule_domain(dapm_post_sequence_async, d,
1528 &async_domain);
1529 async_synchronize_full_domain(&async_domain);
1530
1531 /* do we need to notify any clients that DAPM event is complete */
1532 list_for_each_entry(d, &card->dapm_list, list) {
1533 if (d->stream_event)
1534 d->stream_event(d, event);
1535 }
1536
1537 pop_dbg(dapm->dev, card->pop_time,
1538 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1539 pop_wait(card->pop_time);
1540
1541 trace_snd_soc_dapm_done(card);
1542
1543 return 0;
1544 }
1545
1546 #ifdef CONFIG_DEBUG_FS
1547 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1548 {
1549 file->private_data = inode->i_private;
1550 return 0;
1551 }
1552
1553 static ssize_t dapm_widget_power_read_file(struct file *file,
1554 char __user *user_buf,
1555 size_t count, loff_t *ppos)
1556 {
1557 struct snd_soc_dapm_widget *w = file->private_data;
1558 char *buf;
1559 int in, out;
1560 ssize_t ret;
1561 struct snd_soc_dapm_path *p = NULL;
1562
1563 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1564 if (!buf)
1565 return -ENOMEM;
1566
1567 in = is_connected_input_ep(w);
1568 dapm_clear_walk(w->dapm);
1569 out = is_connected_output_ep(w);
1570 dapm_clear_walk(w->dapm);
1571
1572 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1573 w->name, w->power ? "On" : "Off",
1574 w->force ? " (forced)" : "", in, out);
1575
1576 if (w->reg >= 0)
1577 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1578 " - R%d(0x%x) bit %d",
1579 w->reg, w->reg, w->shift);
1580
1581 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1582
1583 if (w->sname)
1584 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1585 w->sname,
1586 w->active ? "active" : "inactive");
1587
1588 list_for_each_entry(p, &w->sources, list_sink) {
1589 if (p->connected && !p->connected(w, p->sink))
1590 continue;
1591
1592 if (p->connect)
1593 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1594 " in \"%s\" \"%s\"\n",
1595 p->name ? p->name : "static",
1596 p->source->name);
1597 }
1598 list_for_each_entry(p, &w->sinks, list_source) {
1599 if (p->connected && !p->connected(w, p->sink))
1600 continue;
1601
1602 if (p->connect)
1603 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1604 " out \"%s\" \"%s\"\n",
1605 p->name ? p->name : "static",
1606 p->sink->name);
1607 }
1608
1609 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1610
1611 kfree(buf);
1612 return ret;
1613 }
1614
1615 static const struct file_operations dapm_widget_power_fops = {
1616 .open = dapm_widget_power_open_file,
1617 .read = dapm_widget_power_read_file,
1618 .llseek = default_llseek,
1619 };
1620
1621 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1622 {
1623 file->private_data = inode->i_private;
1624 return 0;
1625 }
1626
1627 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1628 size_t count, loff_t *ppos)
1629 {
1630 struct snd_soc_dapm_context *dapm = file->private_data;
1631 char *level;
1632
1633 switch (dapm->bias_level) {
1634 case SND_SOC_BIAS_ON:
1635 level = "On\n";
1636 break;
1637 case SND_SOC_BIAS_PREPARE:
1638 level = "Prepare\n";
1639 break;
1640 case SND_SOC_BIAS_STANDBY:
1641 level = "Standby\n";
1642 break;
1643 case SND_SOC_BIAS_OFF:
1644 level = "Off\n";
1645 break;
1646 default:
1647 BUG();
1648 level = "Unknown\n";
1649 break;
1650 }
1651
1652 return simple_read_from_buffer(user_buf, count, ppos, level,
1653 strlen(level));
1654 }
1655
1656 static const struct file_operations dapm_bias_fops = {
1657 .open = dapm_bias_open_file,
1658 .read = dapm_bias_read_file,
1659 .llseek = default_llseek,
1660 };
1661
1662 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1663 struct dentry *parent)
1664 {
1665 struct dentry *d;
1666
1667 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1668
1669 if (!dapm->debugfs_dapm) {
1670 dev_warn(dapm->dev,
1671 "Failed to create DAPM debugfs directory\n");
1672 return;
1673 }
1674
1675 d = debugfs_create_file("bias_level", 0444,
1676 dapm->debugfs_dapm, dapm,
1677 &dapm_bias_fops);
1678 if (!d)
1679 dev_warn(dapm->dev,
1680 "ASoC: Failed to create bias level debugfs file\n");
1681 }
1682
1683 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1684 {
1685 struct snd_soc_dapm_context *dapm = w->dapm;
1686 struct dentry *d;
1687
1688 if (!dapm->debugfs_dapm || !w->name)
1689 return;
1690
1691 d = debugfs_create_file(w->name, 0444,
1692 dapm->debugfs_dapm, w,
1693 &dapm_widget_power_fops);
1694 if (!d)
1695 dev_warn(w->dapm->dev,
1696 "ASoC: Failed to create %s debugfs file\n",
1697 w->name);
1698 }
1699
1700 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1701 {
1702 debugfs_remove_recursive(dapm->debugfs_dapm);
1703 }
1704
1705 #else
1706 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1707 struct dentry *parent)
1708 {
1709 }
1710
1711 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1712 {
1713 }
1714
1715 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1716 {
1717 }
1718
1719 #endif
1720
1721 /* test and update the power status of a mux widget */
1722 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1723 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1724 {
1725 struct snd_soc_dapm_path *path;
1726 int found = 0;
1727
1728 if (widget->id != snd_soc_dapm_mux &&
1729 widget->id != snd_soc_dapm_virt_mux &&
1730 widget->id != snd_soc_dapm_value_mux)
1731 return -ENODEV;
1732
1733 /* find dapm widget path assoc with kcontrol */
1734 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1735 if (path->kcontrol != kcontrol)
1736 continue;
1737
1738 if (!path->name || !e->texts[mux])
1739 continue;
1740
1741 found = 1;
1742 /* we now need to match the string in the enum to the path */
1743 if (!(strcmp(path->name, e->texts[mux]))) {
1744 path->connect = 1; /* new connection */
1745 dapm_mark_dirty(path->source, "mux connection");
1746 } else {
1747 if (path->connect)
1748 dapm_mark_dirty(path->source,
1749 "mux disconnection");
1750 path->connect = 0; /* old connection must be powered down */
1751 }
1752 }
1753
1754 if (found) {
1755 dapm_mark_dirty(widget, "mux change");
1756 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1757 }
1758
1759 return 0;
1760 }
1761 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
1762
1763 /* test and update the power status of a mixer or switch widget */
1764 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1765 struct snd_kcontrol *kcontrol, int connect)
1766 {
1767 struct snd_soc_dapm_path *path;
1768 int found = 0;
1769
1770 if (widget->id != snd_soc_dapm_mixer &&
1771 widget->id != snd_soc_dapm_mixer_named_ctl &&
1772 widget->id != snd_soc_dapm_switch)
1773 return -ENODEV;
1774
1775 /* find dapm widget path assoc with kcontrol */
1776 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1777 if (path->kcontrol != kcontrol)
1778 continue;
1779
1780 /* found, now check type */
1781 found = 1;
1782 path->connect = connect;
1783 dapm_mark_dirty(path->source, "mixer connection");
1784 }
1785
1786 if (found) {
1787 dapm_mark_dirty(widget, "mixer update");
1788 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1789 }
1790
1791 return 0;
1792 }
1793 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
1794
1795 /* show dapm widget status in sys fs */
1796 static ssize_t dapm_widget_show(struct device *dev,
1797 struct device_attribute *attr, char *buf)
1798 {
1799 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
1800 struct snd_soc_codec *codec =rtd->codec;
1801 struct snd_soc_dapm_widget *w;
1802 int count = 0;
1803 char *state = "not set";
1804
1805 list_for_each_entry(w, &codec->card->widgets, list) {
1806 if (w->dapm != &codec->dapm)
1807 continue;
1808
1809 /* only display widgets that burnm power */
1810 switch (w->id) {
1811 case snd_soc_dapm_hp:
1812 case snd_soc_dapm_mic:
1813 case snd_soc_dapm_spk:
1814 case snd_soc_dapm_line:
1815 case snd_soc_dapm_micbias:
1816 case snd_soc_dapm_dac:
1817 case snd_soc_dapm_adc:
1818 case snd_soc_dapm_pga:
1819 case snd_soc_dapm_out_drv:
1820 case snd_soc_dapm_mixer:
1821 case snd_soc_dapm_mixer_named_ctl:
1822 case snd_soc_dapm_supply:
1823 case snd_soc_dapm_regulator_supply:
1824 if (w->name)
1825 count += sprintf(buf + count, "%s: %s\n",
1826 w->name, w->power ? "On":"Off");
1827 break;
1828 default:
1829 break;
1830 }
1831 }
1832
1833 switch (codec->dapm.bias_level) {
1834 case SND_SOC_BIAS_ON:
1835 state = "On";
1836 break;
1837 case SND_SOC_BIAS_PREPARE:
1838 state = "Prepare";
1839 break;
1840 case SND_SOC_BIAS_STANDBY:
1841 state = "Standby";
1842 break;
1843 case SND_SOC_BIAS_OFF:
1844 state = "Off";
1845 break;
1846 }
1847 count += sprintf(buf + count, "PM State: %s\n", state);
1848
1849 return count;
1850 }
1851
1852 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1853
1854 int snd_soc_dapm_sys_add(struct device *dev)
1855 {
1856 return device_create_file(dev, &dev_attr_dapm_widget);
1857 }
1858
1859 static void snd_soc_dapm_sys_remove(struct device *dev)
1860 {
1861 device_remove_file(dev, &dev_attr_dapm_widget);
1862 }
1863
1864 /* free all dapm widgets and resources */
1865 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1866 {
1867 struct snd_soc_dapm_widget *w, *next_w;
1868 struct snd_soc_dapm_path *p, *next_p;
1869
1870 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1871 if (w->dapm != dapm)
1872 continue;
1873 list_del(&w->list);
1874 /*
1875 * remove source and sink paths associated to this widget.
1876 * While removing the path, remove reference to it from both
1877 * source and sink widgets so that path is removed only once.
1878 */
1879 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1880 list_del(&p->list_sink);
1881 list_del(&p->list_source);
1882 list_del(&p->list);
1883 kfree(p->long_name);
1884 kfree(p);
1885 }
1886 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1887 list_del(&p->list_sink);
1888 list_del(&p->list_source);
1889 list_del(&p->list);
1890 kfree(p->long_name);
1891 kfree(p);
1892 }
1893 kfree(w->kcontrols);
1894 kfree(w->name);
1895 kfree(w);
1896 }
1897 }
1898
1899 static struct snd_soc_dapm_widget *dapm_find_widget(
1900 struct snd_soc_dapm_context *dapm, const char *pin,
1901 bool search_other_contexts)
1902 {
1903 struct snd_soc_dapm_widget *w;
1904 struct snd_soc_dapm_widget *fallback = NULL;
1905
1906 list_for_each_entry(w, &dapm->card->widgets, list) {
1907 if (!strcmp(w->name, pin)) {
1908 if (w->dapm == dapm)
1909 return w;
1910 else
1911 fallback = w;
1912 }
1913 }
1914
1915 if (search_other_contexts)
1916 return fallback;
1917
1918 return NULL;
1919 }
1920
1921 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1922 const char *pin, int status)
1923 {
1924 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1925
1926 if (!w) {
1927 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1928 return -EINVAL;
1929 }
1930
1931 if (w->connected != status)
1932 dapm_mark_dirty(w, "pin configuration");
1933
1934 w->connected = status;
1935 if (status == 0)
1936 w->force = 0;
1937
1938 return 0;
1939 }
1940
1941 /**
1942 * snd_soc_dapm_sync - scan and power dapm paths
1943 * @dapm: DAPM context
1944 *
1945 * Walks all dapm audio paths and powers widgets according to their
1946 * stream or path usage.
1947 *
1948 * Returns 0 for success.
1949 */
1950 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1951 {
1952 int ret;
1953
1954 /*
1955 * Suppress early reports (eg, jacks syncing their state) to avoid
1956 * silly DAPM runs during card startup.
1957 */
1958 if (!dapm->card || !dapm->card->instantiated)
1959 return 0;
1960
1961 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
1962 ret = dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1963 mutex_unlock(&dapm->card->dapm_mutex);
1964 return ret;
1965 }
1966 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1967
1968 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1969 const struct snd_soc_dapm_route *route)
1970 {
1971 struct snd_soc_dapm_path *path;
1972 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1973 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1974 const char *sink;
1975 const char *control = route->control;
1976 const char *source;
1977 char prefixed_sink[80];
1978 char prefixed_source[80];
1979 int ret = 0;
1980
1981 if (dapm->codec && dapm->codec->name_prefix) {
1982 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1983 dapm->codec->name_prefix, route->sink);
1984 sink = prefixed_sink;
1985 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1986 dapm->codec->name_prefix, route->source);
1987 source = prefixed_source;
1988 } else {
1989 sink = route->sink;
1990 source = route->source;
1991 }
1992
1993 /*
1994 * find src and dest widgets over all widgets but favor a widget from
1995 * current DAPM context
1996 */
1997 list_for_each_entry(w, &dapm->card->widgets, list) {
1998 if (!wsink && !(strcmp(w->name, sink))) {
1999 wtsink = w;
2000 if (w->dapm == dapm)
2001 wsink = w;
2002 continue;
2003 }
2004 if (!wsource && !(strcmp(w->name, source))) {
2005 wtsource = w;
2006 if (w->dapm == dapm)
2007 wsource = w;
2008 }
2009 }
2010 /* use widget from another DAPM context if not found from this */
2011 if (!wsink)
2012 wsink = wtsink;
2013 if (!wsource)
2014 wsource = wtsource;
2015
2016 if (wsource == NULL || wsink == NULL)
2017 return -ENODEV;
2018
2019 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2020 if (!path)
2021 return -ENOMEM;
2022
2023 path->source = wsource;
2024 path->sink = wsink;
2025 path->connected = route->connected;
2026 INIT_LIST_HEAD(&path->list);
2027 INIT_LIST_HEAD(&path->list_source);
2028 INIT_LIST_HEAD(&path->list_sink);
2029
2030 /* check for external widgets */
2031 if (wsink->id == snd_soc_dapm_input) {
2032 if (wsource->id == snd_soc_dapm_micbias ||
2033 wsource->id == snd_soc_dapm_mic ||
2034 wsource->id == snd_soc_dapm_line ||
2035 wsource->id == snd_soc_dapm_output)
2036 wsink->ext = 1;
2037 }
2038 if (wsource->id == snd_soc_dapm_output) {
2039 if (wsink->id == snd_soc_dapm_spk ||
2040 wsink->id == snd_soc_dapm_hp ||
2041 wsink->id == snd_soc_dapm_line ||
2042 wsink->id == snd_soc_dapm_input)
2043 wsource->ext = 1;
2044 }
2045
2046 /* connect static paths */
2047 if (control == NULL) {
2048 list_add(&path->list, &dapm->card->paths);
2049 list_add(&path->list_sink, &wsink->sources);
2050 list_add(&path->list_source, &wsource->sinks);
2051 path->connect = 1;
2052 return 0;
2053 }
2054
2055 /* connect dynamic paths */
2056 switch (wsink->id) {
2057 case snd_soc_dapm_adc:
2058 case snd_soc_dapm_dac:
2059 case snd_soc_dapm_pga:
2060 case snd_soc_dapm_out_drv:
2061 case snd_soc_dapm_input:
2062 case snd_soc_dapm_output:
2063 case snd_soc_dapm_siggen:
2064 case snd_soc_dapm_micbias:
2065 case snd_soc_dapm_vmid:
2066 case snd_soc_dapm_pre:
2067 case snd_soc_dapm_post:
2068 case snd_soc_dapm_supply:
2069 case snd_soc_dapm_regulator_supply:
2070 case snd_soc_dapm_aif_in:
2071 case snd_soc_dapm_aif_out:
2072 case snd_soc_dapm_dai:
2073 list_add(&path->list, &dapm->card->paths);
2074 list_add(&path->list_sink, &wsink->sources);
2075 list_add(&path->list_source, &wsource->sinks);
2076 path->connect = 1;
2077 return 0;
2078 case snd_soc_dapm_mux:
2079 case snd_soc_dapm_virt_mux:
2080 case snd_soc_dapm_value_mux:
2081 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2082 &wsink->kcontrol_news[0]);
2083 if (ret != 0)
2084 goto err;
2085 break;
2086 case snd_soc_dapm_switch:
2087 case snd_soc_dapm_mixer:
2088 case snd_soc_dapm_mixer_named_ctl:
2089 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2090 if (ret != 0)
2091 goto err;
2092 break;
2093 case snd_soc_dapm_hp:
2094 case snd_soc_dapm_mic:
2095 case snd_soc_dapm_line:
2096 case snd_soc_dapm_spk:
2097 list_add(&path->list, &dapm->card->paths);
2098 list_add(&path->list_sink, &wsink->sources);
2099 list_add(&path->list_source, &wsource->sinks);
2100 path->connect = 0;
2101 return 0;
2102 }
2103 return 0;
2104
2105 err:
2106 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
2107 source, control, sink);
2108 kfree(path);
2109 return ret;
2110 }
2111
2112 /**
2113 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2114 * @dapm: DAPM context
2115 * @route: audio routes
2116 * @num: number of routes
2117 *
2118 * Connects 2 dapm widgets together via a named audio path. The sink is
2119 * the widget receiving the audio signal, whilst the source is the sender
2120 * of the audio signal.
2121 *
2122 * Returns 0 for success else error. On error all resources can be freed
2123 * with a call to snd_soc_card_free().
2124 */
2125 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2126 const struct snd_soc_dapm_route *route, int num)
2127 {
2128 int i, ret;
2129
2130 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2131 for (i = 0; i < num; i++) {
2132 ret = snd_soc_dapm_add_route(dapm, route);
2133 if (ret < 0) {
2134 dev_err(dapm->dev, "Failed to add route %s->%s\n",
2135 route->source, route->sink);
2136 return ret;
2137 }
2138 route++;
2139 }
2140 mutex_unlock(&dapm->card->dapm_mutex);
2141
2142 return 0;
2143 }
2144 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2145
2146 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2147 const struct snd_soc_dapm_route *route)
2148 {
2149 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2150 route->source,
2151 true);
2152 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2153 route->sink,
2154 true);
2155 struct snd_soc_dapm_path *path;
2156 int count = 0;
2157
2158 if (!source) {
2159 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
2160 route->source);
2161 return -ENODEV;
2162 }
2163
2164 if (!sink) {
2165 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
2166 route->sink);
2167 return -ENODEV;
2168 }
2169
2170 if (route->control || route->connected)
2171 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
2172 route->source, route->sink);
2173
2174 list_for_each_entry(path, &source->sinks, list_source) {
2175 if (path->sink == sink) {
2176 path->weak = 1;
2177 count++;
2178 }
2179 }
2180
2181 if (count == 0)
2182 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
2183 route->source, route->sink);
2184 if (count > 1)
2185 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
2186 count, route->source, route->sink);
2187
2188 return 0;
2189 }
2190
2191 /**
2192 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2193 * @dapm: DAPM context
2194 * @route: audio routes
2195 * @num: number of routes
2196 *
2197 * Mark existing routes matching those specified in the passed array
2198 * as being weak, meaning that they are ignored for the purpose of
2199 * power decisions. The main intended use case is for sidetone paths
2200 * which couple audio between other independent paths if they are both
2201 * active in order to make the combination work better at the user
2202 * level but which aren't intended to be "used".
2203 *
2204 * Note that CODEC drivers should not use this as sidetone type paths
2205 * can frequently also be used as bypass paths.
2206 */
2207 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2208 const struct snd_soc_dapm_route *route, int num)
2209 {
2210 int i, err;
2211 int ret = 0;
2212
2213 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2214 for (i = 0; i < num; i++) {
2215 err = snd_soc_dapm_weak_route(dapm, route);
2216 if (err)
2217 ret = err;
2218 route++;
2219 }
2220 mutex_unlock(&dapm->card->dapm_mutex);
2221
2222 return ret;
2223 }
2224 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2225
2226 /**
2227 * snd_soc_dapm_new_widgets - add new dapm widgets
2228 * @dapm: DAPM context
2229 *
2230 * Checks the codec for any new dapm widgets and creates them if found.
2231 *
2232 * Returns 0 for success.
2233 */
2234 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2235 {
2236 struct snd_soc_dapm_widget *w;
2237 unsigned int val;
2238
2239 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2240
2241 list_for_each_entry(w, &dapm->card->widgets, list)
2242 {
2243 if (w->new)
2244 continue;
2245
2246 if (w->num_kcontrols) {
2247 w->kcontrols = kzalloc(w->num_kcontrols *
2248 sizeof(struct snd_kcontrol *),
2249 GFP_KERNEL);
2250 if (!w->kcontrols) {
2251 mutex_unlock(&dapm->card->dapm_mutex);
2252 return -ENOMEM;
2253 }
2254 }
2255
2256 switch(w->id) {
2257 case snd_soc_dapm_switch:
2258 case snd_soc_dapm_mixer:
2259 case snd_soc_dapm_mixer_named_ctl:
2260 dapm_new_mixer(w);
2261 break;
2262 case snd_soc_dapm_mux:
2263 case snd_soc_dapm_virt_mux:
2264 case snd_soc_dapm_value_mux:
2265 dapm_new_mux(w);
2266 break;
2267 case snd_soc_dapm_pga:
2268 case snd_soc_dapm_out_drv:
2269 dapm_new_pga(w);
2270 break;
2271 default:
2272 break;
2273 }
2274
2275 /* Read the initial power state from the device */
2276 if (w->reg >= 0) {
2277 val = soc_widget_read(w, w->reg);
2278 val &= 1 << w->shift;
2279 if (w->invert)
2280 val = !val;
2281
2282 if (val)
2283 w->power = 1;
2284 }
2285
2286 w->new = 1;
2287
2288 dapm_mark_dirty(w, "new widget");
2289 dapm_debugfs_add_widget(w);
2290 }
2291
2292 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2293 mutex_unlock(&dapm->card->dapm_mutex);
2294 return 0;
2295 }
2296 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2297
2298 /**
2299 * snd_soc_dapm_get_volsw - dapm mixer get callback
2300 * @kcontrol: mixer control
2301 * @ucontrol: control element information
2302 *
2303 * Callback to get the value of a dapm mixer control.
2304 *
2305 * Returns 0 for success.
2306 */
2307 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2308 struct snd_ctl_elem_value *ucontrol)
2309 {
2310 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2311 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2312 struct soc_mixer_control *mc =
2313 (struct soc_mixer_control *)kcontrol->private_value;
2314 unsigned int reg = mc->reg;
2315 unsigned int shift = mc->shift;
2316 unsigned int rshift = mc->rshift;
2317 int max = mc->max;
2318 unsigned int invert = mc->invert;
2319 unsigned int mask = (1 << fls(max)) - 1;
2320
2321 ucontrol->value.integer.value[0] =
2322 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2323 if (shift != rshift)
2324 ucontrol->value.integer.value[1] =
2325 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2326 if (invert) {
2327 ucontrol->value.integer.value[0] =
2328 max - ucontrol->value.integer.value[0];
2329 if (shift != rshift)
2330 ucontrol->value.integer.value[1] =
2331 max - ucontrol->value.integer.value[1];
2332 }
2333
2334 return 0;
2335 }
2336 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2337
2338 /**
2339 * snd_soc_dapm_put_volsw - dapm mixer set callback
2340 * @kcontrol: mixer control
2341 * @ucontrol: control element information
2342 *
2343 * Callback to set the value of a dapm mixer control.
2344 *
2345 * Returns 0 for success.
2346 */
2347 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2348 struct snd_ctl_elem_value *ucontrol)
2349 {
2350 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2351 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2352 struct snd_soc_codec *codec = widget->codec;
2353 struct snd_soc_card *card = codec->card;
2354 struct soc_mixer_control *mc =
2355 (struct soc_mixer_control *)kcontrol->private_value;
2356 unsigned int reg = mc->reg;
2357 unsigned int shift = mc->shift;
2358 int max = mc->max;
2359 unsigned int mask = (1 << fls(max)) - 1;
2360 unsigned int invert = mc->invert;
2361 unsigned int val;
2362 int connect, change;
2363 struct snd_soc_dapm_update update;
2364 int wi;
2365
2366 val = (ucontrol->value.integer.value[0] & mask);
2367
2368 if (invert)
2369 val = max - val;
2370 mask = mask << shift;
2371 val = val << shift;
2372
2373 if (val)
2374 /* new connection */
2375 connect = invert ? 0 : 1;
2376 else
2377 /* old connection must be powered down */
2378 connect = invert ? 1 : 0;
2379
2380 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
2381
2382 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2383 if (change) {
2384 for (wi = 0; wi < wlist->num_widgets; wi++) {
2385 widget = wlist->widgets[wi];
2386
2387 widget->value = val;
2388
2389 update.kcontrol = kcontrol;
2390 update.widget = widget;
2391 update.reg = reg;
2392 update.mask = mask;
2393 update.val = val;
2394 widget->dapm->update = &update;
2395
2396 snd_soc_dapm_mixer_update_power(widget, kcontrol, connect);
2397
2398 widget->dapm->update = NULL;
2399 }
2400 }
2401
2402 mutex_unlock(&card->dapm_mutex);
2403 return 0;
2404 }
2405 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2406
2407 /**
2408 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2409 * @kcontrol: mixer control
2410 * @ucontrol: control element information
2411 *
2412 * Callback to get the value of a dapm enumerated double mixer control.
2413 *
2414 * Returns 0 for success.
2415 */
2416 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2417 struct snd_ctl_elem_value *ucontrol)
2418 {
2419 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2420 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2421 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2422 unsigned int val, bitmask;
2423
2424 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2425 ;
2426 val = snd_soc_read(widget->codec, e->reg);
2427 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2428 if (e->shift_l != e->shift_r)
2429 ucontrol->value.enumerated.item[1] =
2430 (val >> e->shift_r) & (bitmask - 1);
2431
2432 return 0;
2433 }
2434 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2435
2436 /**
2437 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2438 * @kcontrol: mixer control
2439 * @ucontrol: control element information
2440 *
2441 * Callback to set the value of a dapm enumerated double mixer control.
2442 *
2443 * Returns 0 for success.
2444 */
2445 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2446 struct snd_ctl_elem_value *ucontrol)
2447 {
2448 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2449 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2450 struct snd_soc_codec *codec = widget->codec;
2451 struct snd_soc_card *card = codec->card;
2452 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2453 unsigned int val, mux, change;
2454 unsigned int mask, bitmask;
2455 struct snd_soc_dapm_update update;
2456 int wi;
2457
2458 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2459 ;
2460 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2461 return -EINVAL;
2462 mux = ucontrol->value.enumerated.item[0];
2463 val = mux << e->shift_l;
2464 mask = (bitmask - 1) << e->shift_l;
2465 if (e->shift_l != e->shift_r) {
2466 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2467 return -EINVAL;
2468 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2469 mask |= (bitmask - 1) << e->shift_r;
2470 }
2471
2472 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
2473
2474 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2475 if (change) {
2476 for (wi = 0; wi < wlist->num_widgets; wi++) {
2477 widget = wlist->widgets[wi];
2478
2479 widget->value = val;
2480
2481 update.kcontrol = kcontrol;
2482 update.widget = widget;
2483 update.reg = e->reg;
2484 update.mask = mask;
2485 update.val = val;
2486 widget->dapm->update = &update;
2487
2488 snd_soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2489
2490 widget->dapm->update = NULL;
2491 }
2492 }
2493
2494 mutex_unlock(&card->dapm_mutex);
2495 return change;
2496 }
2497 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2498
2499 /**
2500 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2501 * @kcontrol: mixer control
2502 * @ucontrol: control element information
2503 *
2504 * Returns 0 for success.
2505 */
2506 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2507 struct snd_ctl_elem_value *ucontrol)
2508 {
2509 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2510 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2511
2512 ucontrol->value.enumerated.item[0] = widget->value;
2513
2514 return 0;
2515 }
2516 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2517
2518 /**
2519 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2520 * @kcontrol: mixer control
2521 * @ucontrol: control element information
2522 *
2523 * Returns 0 for success.
2524 */
2525 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2526 struct snd_ctl_elem_value *ucontrol)
2527 {
2528 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2529 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2530 struct snd_soc_codec *codec = widget->codec;
2531 struct snd_soc_card *card = codec->card;
2532 struct soc_enum *e =
2533 (struct soc_enum *)kcontrol->private_value;
2534 int change;
2535 int ret = 0;
2536 int wi;
2537
2538 if (ucontrol->value.enumerated.item[0] >= e->max)
2539 return -EINVAL;
2540
2541 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
2542
2543 change = widget->value != ucontrol->value.enumerated.item[0];
2544 if (change) {
2545 for (wi = 0; wi < wlist->num_widgets; wi++) {
2546 widget = wlist->widgets[wi];
2547
2548 widget->value = ucontrol->value.enumerated.item[0];
2549
2550 snd_soc_dapm_mux_update_power(widget, kcontrol, widget->value, e);
2551 }
2552 }
2553
2554 mutex_unlock(&card->dapm_mutex);
2555 return ret;
2556 }
2557 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2558
2559 /**
2560 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2561 * callback
2562 * @kcontrol: mixer control
2563 * @ucontrol: control element information
2564 *
2565 * Callback to get the value of a dapm semi enumerated double mixer control.
2566 *
2567 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2568 * used for handling bitfield coded enumeration for example.
2569 *
2570 * Returns 0 for success.
2571 */
2572 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2573 struct snd_ctl_elem_value *ucontrol)
2574 {
2575 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2576 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2577 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2578 unsigned int reg_val, val, mux;
2579
2580 reg_val = snd_soc_read(widget->codec, e->reg);
2581 val = (reg_val >> e->shift_l) & e->mask;
2582 for (mux = 0; mux < e->max; mux++) {
2583 if (val == e->values[mux])
2584 break;
2585 }
2586 ucontrol->value.enumerated.item[0] = mux;
2587 if (e->shift_l != e->shift_r) {
2588 val = (reg_val >> e->shift_r) & e->mask;
2589 for (mux = 0; mux < e->max; mux++) {
2590 if (val == e->values[mux])
2591 break;
2592 }
2593 ucontrol->value.enumerated.item[1] = mux;
2594 }
2595
2596 return 0;
2597 }
2598 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2599
2600 /**
2601 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2602 * callback
2603 * @kcontrol: mixer control
2604 * @ucontrol: control element information
2605 *
2606 * Callback to set the value of a dapm semi enumerated double mixer control.
2607 *
2608 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2609 * used for handling bitfield coded enumeration for example.
2610 *
2611 * Returns 0 for success.
2612 */
2613 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2614 struct snd_ctl_elem_value *ucontrol)
2615 {
2616 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2617 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2618 struct snd_soc_codec *codec = widget->codec;
2619 struct snd_soc_card *card = codec->card;
2620 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2621 unsigned int val, mux, change;
2622 unsigned int mask;
2623 struct snd_soc_dapm_update update;
2624 int wi;
2625
2626 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2627 return -EINVAL;
2628 mux = ucontrol->value.enumerated.item[0];
2629 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2630 mask = e->mask << e->shift_l;
2631 if (e->shift_l != e->shift_r) {
2632 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2633 return -EINVAL;
2634 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2635 mask |= e->mask << e->shift_r;
2636 }
2637
2638 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
2639
2640 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2641 if (change) {
2642 for (wi = 0; wi < wlist->num_widgets; wi++) {
2643 widget = wlist->widgets[wi];
2644
2645 widget->value = val;
2646
2647 update.kcontrol = kcontrol;
2648 update.widget = widget;
2649 update.reg = e->reg;
2650 update.mask = mask;
2651 update.val = val;
2652 widget->dapm->update = &update;
2653
2654 snd_soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2655
2656 widget->dapm->update = NULL;
2657 }
2658 }
2659
2660 mutex_unlock(&card->dapm_mutex);
2661 return change;
2662 }
2663 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2664
2665 /**
2666 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2667 *
2668 * @kcontrol: mixer control
2669 * @uinfo: control element information
2670 *
2671 * Callback to provide information about a pin switch control.
2672 */
2673 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2674 struct snd_ctl_elem_info *uinfo)
2675 {
2676 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2677 uinfo->count = 1;
2678 uinfo->value.integer.min = 0;
2679 uinfo->value.integer.max = 1;
2680
2681 return 0;
2682 }
2683 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2684
2685 /**
2686 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2687 *
2688 * @kcontrol: mixer control
2689 * @ucontrol: Value
2690 */
2691 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2692 struct snd_ctl_elem_value *ucontrol)
2693 {
2694 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
2695 const char *pin = (const char *)kcontrol->private_value;
2696
2697 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
2698
2699 ucontrol->value.integer.value[0] =
2700 snd_soc_dapm_get_pin_status(&card->dapm, pin);
2701
2702 mutex_unlock(&card->dapm_mutex);
2703
2704 return 0;
2705 }
2706 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2707
2708 /**
2709 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2710 *
2711 * @kcontrol: mixer control
2712 * @ucontrol: Value
2713 */
2714 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2715 struct snd_ctl_elem_value *ucontrol)
2716 {
2717 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
2718 const char *pin = (const char *)kcontrol->private_value;
2719
2720 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
2721
2722 if (ucontrol->value.integer.value[0])
2723 snd_soc_dapm_enable_pin(&card->dapm, pin);
2724 else
2725 snd_soc_dapm_disable_pin(&card->dapm, pin);
2726
2727 mutex_unlock(&card->dapm_mutex);
2728
2729 snd_soc_dapm_sync(&card->dapm);
2730 return 0;
2731 }
2732 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2733
2734 static struct snd_soc_dapm_widget *
2735 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2736 const struct snd_soc_dapm_widget *widget)
2737 {
2738 struct snd_soc_dapm_widget *w;
2739 size_t name_len;
2740 int ret;
2741
2742 if ((w = dapm_cnew_widget(widget)) == NULL)
2743 return NULL;
2744
2745 switch (w->id) {
2746 case snd_soc_dapm_regulator_supply:
2747 w->priv = devm_regulator_get(dapm->dev, w->name);
2748 if (IS_ERR(w->priv)) {
2749 ret = PTR_ERR(w->priv);
2750 dev_err(dapm->dev, "Failed to request %s: %d\n",
2751 w->name, ret);
2752 return NULL;
2753 }
2754 break;
2755 default:
2756 break;
2757 }
2758
2759 name_len = strlen(widget->name) + 1;
2760 if (dapm->codec && dapm->codec->name_prefix)
2761 name_len += 1 + strlen(dapm->codec->name_prefix);
2762 w->name = kmalloc(name_len, GFP_KERNEL);
2763 if (w->name == NULL) {
2764 kfree(w);
2765 return NULL;
2766 }
2767 if (dapm->codec && dapm->codec->name_prefix)
2768 snprintf((char *)w->name, name_len, "%s %s",
2769 dapm->codec->name_prefix, widget->name);
2770 else
2771 snprintf((char *)w->name, name_len, "%s", widget->name);
2772
2773 switch (w->id) {
2774 case snd_soc_dapm_switch:
2775 case snd_soc_dapm_mixer:
2776 case snd_soc_dapm_mixer_named_ctl:
2777 w->power_check = dapm_generic_check_power;
2778 break;
2779 case snd_soc_dapm_mux:
2780 case snd_soc_dapm_virt_mux:
2781 case snd_soc_dapm_value_mux:
2782 w->power_check = dapm_generic_check_power;
2783 break;
2784 case snd_soc_dapm_adc:
2785 case snd_soc_dapm_aif_out:
2786 w->power_check = dapm_adc_check_power;
2787 break;
2788 case snd_soc_dapm_dac:
2789 case snd_soc_dapm_aif_in:
2790 w->power_check = dapm_dac_check_power;
2791 break;
2792 case snd_soc_dapm_pga:
2793 case snd_soc_dapm_out_drv:
2794 case snd_soc_dapm_input:
2795 case snd_soc_dapm_output:
2796 case snd_soc_dapm_micbias:
2797 case snd_soc_dapm_spk:
2798 case snd_soc_dapm_hp:
2799 case snd_soc_dapm_mic:
2800 case snd_soc_dapm_line:
2801 w->power_check = dapm_generic_check_power;
2802 break;
2803 case snd_soc_dapm_supply:
2804 case snd_soc_dapm_regulator_supply:
2805 w->power_check = dapm_supply_check_power;
2806 break;
2807 case snd_soc_dapm_dai:
2808 w->power_check = dapm_dai_check_power;
2809 break;
2810 default:
2811 w->power_check = dapm_always_on_check_power;
2812 break;
2813 }
2814
2815 dapm->n_widgets++;
2816 w->dapm = dapm;
2817 w->codec = dapm->codec;
2818 w->platform = dapm->platform;
2819 INIT_LIST_HEAD(&w->sources);
2820 INIT_LIST_HEAD(&w->sinks);
2821 INIT_LIST_HEAD(&w->list);
2822 INIT_LIST_HEAD(&w->dirty);
2823 list_add(&w->list, &dapm->card->widgets);
2824
2825 /* machine layer set ups unconnected pins and insertions */
2826 w->connected = 1;
2827 return w;
2828 }
2829
2830 /**
2831 * snd_soc_dapm_new_controls - create new dapm controls
2832 * @dapm: DAPM context
2833 * @widget: widget array
2834 * @num: number of widgets
2835 *
2836 * Creates new DAPM controls based upon the templates.
2837 *
2838 * Returns 0 for success else error.
2839 */
2840 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2841 const struct snd_soc_dapm_widget *widget,
2842 int num)
2843 {
2844 struct snd_soc_dapm_widget *w;
2845 int i;
2846
2847 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2848 for (i = 0; i < num; i++) {
2849 w = snd_soc_dapm_new_control(dapm, widget);
2850 if (!w) {
2851 dev_err(dapm->dev,
2852 "ASoC: Failed to create DAPM control %s\n",
2853 widget->name);
2854 return -ENOMEM;
2855 }
2856 widget++;
2857 }
2858 mutex_unlock(&dapm->card->dapm_mutex);
2859 return 0;
2860 }
2861 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2862
2863 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
2864 struct snd_soc_dai *dai)
2865 {
2866 struct snd_soc_dapm_widget template;
2867 struct snd_soc_dapm_widget *w;
2868
2869 WARN_ON(dapm->dev != dai->dev);
2870
2871 memset(&template, 0, sizeof(template));
2872 template.reg = SND_SOC_NOPM;
2873
2874 if (dai->driver->playback.stream_name) {
2875 template.id = snd_soc_dapm_dai;
2876 template.name = dai->driver->playback.stream_name;
2877 template.sname = dai->driver->playback.stream_name;
2878
2879 dev_dbg(dai->dev, "adding %s widget\n",
2880 template.name);
2881
2882 w = snd_soc_dapm_new_control(dapm, &template);
2883 if (!w) {
2884 dev_err(dapm->dev, "Failed to create %s widget\n",
2885 dai->driver->playback.stream_name);
2886 }
2887
2888 w->priv = dai;
2889 dai->playback_widget = w;
2890 }
2891
2892 if (dai->driver->capture.stream_name) {
2893 template.id = snd_soc_dapm_dai;
2894 template.name = dai->driver->capture.stream_name;
2895 template.sname = dai->driver->capture.stream_name;
2896
2897 dev_dbg(dai->dev, "adding %s widget\n",
2898 template.name);
2899
2900 w = snd_soc_dapm_new_control(dapm, &template);
2901 if (!w) {
2902 dev_err(dapm->dev, "Failed to create %s widget\n",
2903 dai->driver->capture.stream_name);
2904 }
2905
2906 w->priv = dai;
2907 dai->capture_widget = w;
2908 }
2909
2910 return 0;
2911 }
2912
2913 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
2914 {
2915 struct snd_soc_dapm_widget *dai_w, *w;
2916 struct snd_soc_dai *dai;
2917 struct snd_soc_dapm_route r;
2918
2919 memset(&r, 0, sizeof(r));
2920
2921 /* For each DAI widget... */
2922 list_for_each_entry(dai_w, &card->widgets, list) {
2923 if (dai_w->id != snd_soc_dapm_dai)
2924 continue;
2925
2926 dai = dai_w->priv;
2927
2928 /* ...find all widgets with the same stream and link them */
2929 list_for_each_entry(w, &card->widgets, list) {
2930 if (w->dapm != dai_w->dapm)
2931 continue;
2932
2933 if (w->id == snd_soc_dapm_dai)
2934 continue;
2935
2936 if (!w->sname)
2937 continue;
2938
2939 if (dai->driver->playback.stream_name &&
2940 strstr(w->sname,
2941 dai->driver->playback.stream_name)) {
2942 r.source = dai->playback_widget->name;
2943 r.sink = w->name;
2944 dev_dbg(dai->dev, "%s -> %s\n",
2945 r.source, r.sink);
2946
2947 snd_soc_dapm_add_route(w->dapm, &r);
2948 }
2949
2950 if (dai->driver->capture.stream_name &&
2951 strstr(w->sname,
2952 dai->driver->capture.stream_name)) {
2953 r.source = w->name;
2954 r.sink = dai->capture_widget->name;
2955 dev_dbg(dai->dev, "%s -> %s\n",
2956 r.source, r.sink);
2957
2958 snd_soc_dapm_add_route(w->dapm, &r);
2959 }
2960 }
2961 }
2962
2963 return 0;
2964 }
2965
2966 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2967 int stream, struct snd_soc_dai *dai,
2968 int event)
2969 {
2970 struct snd_soc_dapm_widget *w;
2971
2972 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
2973 w = dai->playback_widget;
2974 else
2975 w = dai->capture_widget;
2976
2977 if (!w)
2978 return;
2979
2980 dapm_mark_dirty(w, "stream event");
2981
2982 switch (event) {
2983 case SND_SOC_DAPM_STREAM_START:
2984 w->active = 1;
2985 break;
2986 case SND_SOC_DAPM_STREAM_STOP:
2987 w->active = 0;
2988 break;
2989 case SND_SOC_DAPM_STREAM_SUSPEND:
2990 case SND_SOC_DAPM_STREAM_RESUME:
2991 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2992 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2993 break;
2994 }
2995
2996 dapm_power_widgets(dapm, event);
2997 }
2998
2999 /**
3000 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3001 * @rtd: PCM runtime data
3002 * @stream: stream name
3003 * @event: stream event
3004 *
3005 * Sends a stream event to the dapm core. The core then makes any
3006 * necessary widget power changes.
3007 *
3008 * Returns 0 for success else error.
3009 */
3010 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3011 struct snd_soc_dai *dai, int event)
3012 {
3013 struct snd_soc_card *card = rtd->card;
3014
3015 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_PCM);
3016 soc_dapm_stream_event(&card->dapm, stream, dai, event);
3017 mutex_unlock(&card->dapm_mutex);
3018 return 0;
3019 }
3020
3021 /**
3022 * snd_soc_dapm_enable_pin - enable pin.
3023 * @dapm: DAPM context
3024 * @pin: pin name
3025 *
3026 * Enables input/output pin and its parents or children widgets iff there is
3027 * a valid audio route and active audio stream.
3028 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3029 * do any widget power switching.
3030 */
3031 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3032 {
3033 return snd_soc_dapm_set_pin(dapm, pin, 1);
3034 }
3035 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3036
3037 /**
3038 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3039 * @dapm: DAPM context
3040 * @pin: pin name
3041 *
3042 * Enables input/output pin regardless of any other state. This is
3043 * intended for use with microphone bias supplies used in microphone
3044 * jack detection.
3045 *
3046 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3047 * do any widget power switching.
3048 */
3049 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3050 const char *pin)
3051 {
3052 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3053
3054 if (!w) {
3055 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
3056 return -EINVAL;
3057 }
3058
3059 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
3060 w->connected = 1;
3061 w->force = 1;
3062 dapm_mark_dirty(w, "force enable");
3063
3064 return 0;
3065 }
3066 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3067
3068 /**
3069 * snd_soc_dapm_disable_pin - disable pin.
3070 * @dapm: DAPM context
3071 * @pin: pin name
3072 *
3073 * Disables input/output pin and its parents or children widgets.
3074 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3075 * do any widget power switching.
3076 */
3077 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3078 const char *pin)
3079 {
3080 return snd_soc_dapm_set_pin(dapm, pin, 0);
3081 }
3082 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3083
3084 /**
3085 * snd_soc_dapm_nc_pin - permanently disable pin.
3086 * @dapm: DAPM context
3087 * @pin: pin name
3088 *
3089 * Marks the specified pin as being not connected, disabling it along
3090 * any parent or child widgets. At present this is identical to
3091 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3092 * additional things such as disabling controls which only affect
3093 * paths through the pin.
3094 *
3095 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3096 * do any widget power switching.
3097 */
3098 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3099 {
3100 return snd_soc_dapm_set_pin(dapm, pin, 0);
3101 }
3102 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3103
3104 /**
3105 * snd_soc_dapm_get_pin_status - get audio pin status
3106 * @dapm: DAPM context
3107 * @pin: audio signal pin endpoint (or start point)
3108 *
3109 * Get audio pin status - connected or disconnected.
3110 *
3111 * Returns 1 for connected otherwise 0.
3112 */
3113 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3114 const char *pin)
3115 {
3116 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3117
3118 if (w)
3119 return w->connected;
3120
3121 return 0;
3122 }
3123 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3124
3125 /**
3126 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3127 * @dapm: DAPM context
3128 * @pin: audio signal pin endpoint (or start point)
3129 *
3130 * Mark the given endpoint or pin as ignoring suspend. When the
3131 * system is disabled a path between two endpoints flagged as ignoring
3132 * suspend will not be disabled. The path must already be enabled via
3133 * normal means at suspend time, it will not be turned on if it was not
3134 * already enabled.
3135 */
3136 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3137 const char *pin)
3138 {
3139 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3140
3141 if (!w) {
3142 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
3143 return -EINVAL;
3144 }
3145
3146 w->ignore_suspend = 1;
3147
3148 return 0;
3149 }
3150 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3151
3152 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3153 struct snd_soc_dapm_widget *w)
3154 {
3155 struct snd_soc_dapm_path *p;
3156
3157 list_for_each_entry(p, &card->paths, list) {
3158 if ((p->source == w) || (p->sink == w)) {
3159 dev_dbg(card->dev,
3160 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3161 p->source->name, p->source->id, p->source->dapm,
3162 p->sink->name, p->sink->id, p->sink->dapm);
3163
3164 /* Connected to something other than the codec */
3165 if (p->source->dapm != p->sink->dapm)
3166 return true;
3167 /*
3168 * Loopback connection from codec external pin to
3169 * codec external pin
3170 */
3171 if (p->sink->id == snd_soc_dapm_input) {
3172 switch (p->source->id) {
3173 case snd_soc_dapm_output:
3174 case snd_soc_dapm_micbias:
3175 return true;
3176 default:
3177 break;
3178 }
3179 }
3180 }
3181 }
3182
3183 return false;
3184 }
3185
3186 /**
3187 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3188 * @codec: The codec whose pins should be processed
3189 *
3190 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3191 * which are unused. Pins are used if they are connected externally to the
3192 * codec, whether that be to some other device, or a loop-back connection to
3193 * the codec itself.
3194 */
3195 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3196 {
3197 struct snd_soc_card *card = codec->card;
3198 struct snd_soc_dapm_context *dapm = &codec->dapm;
3199 struct snd_soc_dapm_widget *w;
3200
3201 dev_dbg(codec->dev, "Auto NC: DAPMs: card:%p codec:%p\n",
3202 &card->dapm, &codec->dapm);
3203
3204 list_for_each_entry(w, &card->widgets, list) {
3205 if (w->dapm != dapm)
3206 continue;
3207 switch (w->id) {
3208 case snd_soc_dapm_input:
3209 case snd_soc_dapm_output:
3210 case snd_soc_dapm_micbias:
3211 dev_dbg(codec->dev, "Auto NC: Checking widget %s\n",
3212 w->name);
3213 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3214 dev_dbg(codec->dev,
3215 "... Not in map; disabling\n");
3216 snd_soc_dapm_nc_pin(dapm, w->name);
3217 }
3218 break;
3219 default:
3220 break;
3221 }
3222 }
3223 }
3224
3225 /**
3226 * snd_soc_dapm_free - free dapm resources
3227 * @dapm: DAPM context
3228 *
3229 * Free all dapm widgets and resources.
3230 */
3231 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3232 {
3233 snd_soc_dapm_sys_remove(dapm->dev);
3234 dapm_debugfs_cleanup(dapm);
3235 dapm_free_widgets(dapm);
3236 list_del(&dapm->list);
3237 }
3238 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3239
3240 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3241 {
3242 struct snd_soc_dapm_widget *w;
3243 LIST_HEAD(down_list);
3244 int powerdown = 0;
3245
3246 list_for_each_entry(w, &dapm->card->widgets, list) {
3247 if (w->dapm != dapm)
3248 continue;
3249 if (w->power) {
3250 dapm_seq_insert(w, &down_list, false);
3251 w->power = 0;
3252 powerdown = 1;
3253 }
3254 }
3255
3256 /* If there were no widgets to power down we're already in
3257 * standby.
3258 */
3259 if (powerdown) {
3260 if (dapm->bias_level == SND_SOC_BIAS_ON)
3261 snd_soc_dapm_set_bias_level(dapm,
3262 SND_SOC_BIAS_PREPARE);
3263 dapm_seq_run(dapm, &down_list, 0, false);
3264 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3265 snd_soc_dapm_set_bias_level(dapm,
3266 SND_SOC_BIAS_STANDBY);
3267 }
3268 }
3269
3270 /*
3271 * snd_soc_dapm_shutdown - callback for system shutdown
3272 */
3273 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3274 {
3275 struct snd_soc_codec *codec;
3276
3277 list_for_each_entry(codec, &card->codec_dev_list, list) {
3278 soc_dapm_shutdown_codec(&codec->dapm);
3279 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3280 snd_soc_dapm_set_bias_level(&codec->dapm,
3281 SND_SOC_BIAS_OFF);
3282 }
3283 }
3284
3285 /* Module information */
3286 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3287 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3288 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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