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Merge branch 'for-next' of git://git.infradead.org/users/dhowells/linux-headers
[deliverable/linux.git] / sound / soc / soc-dapm.c
1 /*
2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * Features:
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
15 * DACs/ADCs.
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
20 * sinks, dacs, etc
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
22 * device reopen.
23 *
24 * Todo:
25 * o DAPM power change sequencing - allow for configurable per
26 * codec sequences.
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
30 */
31
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/async.h>
36 #include <linux/delay.h>
37 #include <linux/pm.h>
38 #include <linux/bitops.h>
39 #include <linux/platform_device.h>
40 #include <linux/jiffies.h>
41 #include <linux/debugfs.h>
42 #include <linux/pm_runtime.h>
43 #include <linux/slab.h>
44 #include <sound/core.h>
45 #include <sound/pcm.h>
46 #include <sound/pcm_params.h>
47 #include <sound/soc.h>
48 #include <sound/initval.h>
49
50 #include <trace/events/asoc.h>
51
52 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
53
54 /* dapm power sequences - make this per codec in the future */
55 static int dapm_up_seq[] = {
56 [snd_soc_dapm_pre] = 0,
57 [snd_soc_dapm_supply] = 1,
58 [snd_soc_dapm_micbias] = 2,
59 [snd_soc_dapm_aif_in] = 3,
60 [snd_soc_dapm_aif_out] = 3,
61 [snd_soc_dapm_mic] = 4,
62 [snd_soc_dapm_mux] = 5,
63 [snd_soc_dapm_virt_mux] = 5,
64 [snd_soc_dapm_value_mux] = 5,
65 [snd_soc_dapm_dac] = 6,
66 [snd_soc_dapm_mixer] = 7,
67 [snd_soc_dapm_mixer_named_ctl] = 7,
68 [snd_soc_dapm_pga] = 8,
69 [snd_soc_dapm_adc] = 9,
70 [snd_soc_dapm_out_drv] = 10,
71 [snd_soc_dapm_hp] = 10,
72 [snd_soc_dapm_spk] = 10,
73 [snd_soc_dapm_post] = 11,
74 };
75
76 static int dapm_down_seq[] = {
77 [snd_soc_dapm_pre] = 0,
78 [snd_soc_dapm_adc] = 1,
79 [snd_soc_dapm_hp] = 2,
80 [snd_soc_dapm_spk] = 2,
81 [snd_soc_dapm_out_drv] = 2,
82 [snd_soc_dapm_pga] = 4,
83 [snd_soc_dapm_mixer_named_ctl] = 5,
84 [snd_soc_dapm_mixer] = 5,
85 [snd_soc_dapm_dac] = 6,
86 [snd_soc_dapm_mic] = 7,
87 [snd_soc_dapm_micbias] = 8,
88 [snd_soc_dapm_mux] = 9,
89 [snd_soc_dapm_virt_mux] = 9,
90 [snd_soc_dapm_value_mux] = 9,
91 [snd_soc_dapm_aif_in] = 10,
92 [snd_soc_dapm_aif_out] = 10,
93 [snd_soc_dapm_supply] = 11,
94 [snd_soc_dapm_post] = 12,
95 };
96
97 static void pop_wait(u32 pop_time)
98 {
99 if (pop_time)
100 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
101 }
102
103 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
104 {
105 va_list args;
106 char *buf;
107
108 if (!pop_time)
109 return;
110
111 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
112 if (buf == NULL)
113 return;
114
115 va_start(args, fmt);
116 vsnprintf(buf, PAGE_SIZE, fmt, args);
117 dev_info(dev, "%s", buf);
118 va_end(args);
119
120 kfree(buf);
121 }
122
123 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
124 {
125 return !list_empty(&w->dirty);
126 }
127
128 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
129 {
130 if (!dapm_dirty_widget(w)) {
131 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
132 w->name, reason);
133 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
134 }
135 }
136 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
137
138 /* create a new dapm widget */
139 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
140 const struct snd_soc_dapm_widget *_widget)
141 {
142 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
143 }
144
145 /* get snd_card from DAPM context */
146 static inline struct snd_card *dapm_get_snd_card(
147 struct snd_soc_dapm_context *dapm)
148 {
149 if (dapm->codec)
150 return dapm->codec->card->snd_card;
151 else if (dapm->platform)
152 return dapm->platform->card->snd_card;
153 else
154 BUG();
155
156 /* unreachable */
157 return NULL;
158 }
159
160 /* get soc_card from DAPM context */
161 static inline struct snd_soc_card *dapm_get_soc_card(
162 struct snd_soc_dapm_context *dapm)
163 {
164 if (dapm->codec)
165 return dapm->codec->card;
166 else if (dapm->platform)
167 return dapm->platform->card;
168 else
169 BUG();
170
171 /* unreachable */
172 return NULL;
173 }
174
175 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
176 {
177 if (w->codec)
178 return snd_soc_read(w->codec, reg);
179 else if (w->platform)
180 return snd_soc_platform_read(w->platform, reg);
181
182 dev_err(w->dapm->dev, "no valid widget read method\n");
183 return -1;
184 }
185
186 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
187 {
188 if (w->codec)
189 return snd_soc_write(w->codec, reg, val);
190 else if (w->platform)
191 return snd_soc_platform_write(w->platform, reg, val);
192
193 dev_err(w->dapm->dev, "no valid widget write method\n");
194 return -1;
195 }
196
197 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
198 unsigned short reg, unsigned int mask, unsigned int value)
199 {
200 int change;
201 unsigned int old, new;
202 int ret;
203
204 ret = soc_widget_read(w, reg);
205 if (ret < 0)
206 return ret;
207
208 old = ret;
209 new = (old & ~mask) | (value & mask);
210 change = old != new;
211 if (change) {
212 ret = soc_widget_write(w, reg, new);
213 if (ret < 0)
214 return ret;
215 }
216
217 return change;
218 }
219
220 /**
221 * snd_soc_dapm_set_bias_level - set the bias level for the system
222 * @dapm: DAPM context
223 * @level: level to configure
224 *
225 * Configure the bias (power) levels for the SoC audio device.
226 *
227 * Returns 0 for success else error.
228 */
229 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
230 enum snd_soc_bias_level level)
231 {
232 struct snd_soc_card *card = dapm->card;
233 int ret = 0;
234
235 trace_snd_soc_bias_level_start(card, level);
236
237 if (card && card->set_bias_level)
238 ret = card->set_bias_level(card, dapm, level);
239 if (ret != 0)
240 goto out;
241
242 if (dapm->codec) {
243 if (dapm->codec->driver->set_bias_level)
244 ret = dapm->codec->driver->set_bias_level(dapm->codec,
245 level);
246 else
247 dapm->bias_level = level;
248 }
249 if (ret != 0)
250 goto out;
251
252 if (card && card->set_bias_level_post)
253 ret = card->set_bias_level_post(card, dapm, level);
254 out:
255 trace_snd_soc_bias_level_done(card, level);
256
257 return ret;
258 }
259
260 /* set up initial codec paths */
261 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
262 struct snd_soc_dapm_path *p, int i)
263 {
264 switch (w->id) {
265 case snd_soc_dapm_switch:
266 case snd_soc_dapm_mixer:
267 case snd_soc_dapm_mixer_named_ctl: {
268 int val;
269 struct soc_mixer_control *mc = (struct soc_mixer_control *)
270 w->kcontrol_news[i].private_value;
271 unsigned int reg = mc->reg;
272 unsigned int shift = mc->shift;
273 int max = mc->max;
274 unsigned int mask = (1 << fls(max)) - 1;
275 unsigned int invert = mc->invert;
276
277 val = soc_widget_read(w, reg);
278 val = (val >> shift) & mask;
279
280 if ((invert && !val) || (!invert && val))
281 p->connect = 1;
282 else
283 p->connect = 0;
284 }
285 break;
286 case snd_soc_dapm_mux: {
287 struct soc_enum *e = (struct soc_enum *)
288 w->kcontrol_news[i].private_value;
289 int val, item, bitmask;
290
291 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
292 ;
293 val = soc_widget_read(w, e->reg);
294 item = (val >> e->shift_l) & (bitmask - 1);
295
296 p->connect = 0;
297 for (i = 0; i < e->max; i++) {
298 if (!(strcmp(p->name, e->texts[i])) && item == i)
299 p->connect = 1;
300 }
301 }
302 break;
303 case snd_soc_dapm_virt_mux: {
304 struct soc_enum *e = (struct soc_enum *)
305 w->kcontrol_news[i].private_value;
306
307 p->connect = 0;
308 /* since a virtual mux has no backing registers to
309 * decide which path to connect, it will try to match
310 * with the first enumeration. This is to ensure
311 * that the default mux choice (the first) will be
312 * correctly powered up during initialization.
313 */
314 if (!strcmp(p->name, e->texts[0]))
315 p->connect = 1;
316 }
317 break;
318 case snd_soc_dapm_value_mux: {
319 struct soc_enum *e = (struct soc_enum *)
320 w->kcontrol_news[i].private_value;
321 int val, item;
322
323 val = soc_widget_read(w, e->reg);
324 val = (val >> e->shift_l) & e->mask;
325 for (item = 0; item < e->max; item++) {
326 if (val == e->values[item])
327 break;
328 }
329
330 p->connect = 0;
331 for (i = 0; i < e->max; i++) {
332 if (!(strcmp(p->name, e->texts[i])) && item == i)
333 p->connect = 1;
334 }
335 }
336 break;
337 /* does not affect routing - always connected */
338 case snd_soc_dapm_pga:
339 case snd_soc_dapm_out_drv:
340 case snd_soc_dapm_output:
341 case snd_soc_dapm_adc:
342 case snd_soc_dapm_input:
343 case snd_soc_dapm_siggen:
344 case snd_soc_dapm_dac:
345 case snd_soc_dapm_micbias:
346 case snd_soc_dapm_vmid:
347 case snd_soc_dapm_supply:
348 case snd_soc_dapm_aif_in:
349 case snd_soc_dapm_aif_out:
350 case snd_soc_dapm_hp:
351 case snd_soc_dapm_mic:
352 case snd_soc_dapm_spk:
353 case snd_soc_dapm_line:
354 p->connect = 1;
355 break;
356 /* does affect routing - dynamically connected */
357 case snd_soc_dapm_pre:
358 case snd_soc_dapm_post:
359 p->connect = 0;
360 break;
361 }
362 }
363
364 /* connect mux widget to its interconnecting audio paths */
365 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
366 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
367 struct snd_soc_dapm_path *path, const char *control_name,
368 const struct snd_kcontrol_new *kcontrol)
369 {
370 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
371 int i;
372
373 for (i = 0; i < e->max; i++) {
374 if (!(strcmp(control_name, e->texts[i]))) {
375 list_add(&path->list, &dapm->card->paths);
376 list_add(&path->list_sink, &dest->sources);
377 list_add(&path->list_source, &src->sinks);
378 path->name = (char*)e->texts[i];
379 dapm_set_path_status(dest, path, 0);
380 return 0;
381 }
382 }
383
384 return -ENODEV;
385 }
386
387 /* connect mixer widget to its interconnecting audio paths */
388 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
389 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
390 struct snd_soc_dapm_path *path, const char *control_name)
391 {
392 int i;
393
394 /* search for mixer kcontrol */
395 for (i = 0; i < dest->num_kcontrols; i++) {
396 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
397 list_add(&path->list, &dapm->card->paths);
398 list_add(&path->list_sink, &dest->sources);
399 list_add(&path->list_source, &src->sinks);
400 path->name = dest->kcontrol_news[i].name;
401 dapm_set_path_status(dest, path, i);
402 return 0;
403 }
404 }
405 return -ENODEV;
406 }
407
408 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
409 struct snd_soc_dapm_widget *kcontrolw,
410 const struct snd_kcontrol_new *kcontrol_new,
411 struct snd_kcontrol **kcontrol)
412 {
413 struct snd_soc_dapm_widget *w;
414 int i;
415
416 *kcontrol = NULL;
417
418 list_for_each_entry(w, &dapm->card->widgets, list) {
419 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
420 continue;
421 for (i = 0; i < w->num_kcontrols; i++) {
422 if (&w->kcontrol_news[i] == kcontrol_new) {
423 if (w->kcontrols)
424 *kcontrol = w->kcontrols[i];
425 return 1;
426 }
427 }
428 }
429
430 return 0;
431 }
432
433 /* create new dapm mixer control */
434 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
435 {
436 struct snd_soc_dapm_context *dapm = w->dapm;
437 int i, ret = 0;
438 size_t name_len, prefix_len;
439 struct snd_soc_dapm_path *path;
440 struct snd_card *card = dapm->card->snd_card;
441 const char *prefix;
442 struct snd_soc_dapm_widget_list *wlist;
443 size_t wlistsize;
444
445 if (dapm->codec)
446 prefix = dapm->codec->name_prefix;
447 else
448 prefix = NULL;
449
450 if (prefix)
451 prefix_len = strlen(prefix) + 1;
452 else
453 prefix_len = 0;
454
455 /* add kcontrol */
456 for (i = 0; i < w->num_kcontrols; i++) {
457
458 /* match name */
459 list_for_each_entry(path, &w->sources, list_sink) {
460
461 /* mixer/mux paths name must match control name */
462 if (path->name != (char *)w->kcontrol_news[i].name)
463 continue;
464
465 if (w->kcontrols[i]) {
466 path->kcontrol = w->kcontrols[i];
467 continue;
468 }
469
470 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
471 sizeof(struct snd_soc_dapm_widget *),
472 wlist = kzalloc(wlistsize, GFP_KERNEL);
473 if (wlist == NULL) {
474 dev_err(dapm->dev,
475 "asoc: can't allocate widget list for %s\n",
476 w->name);
477 return -ENOMEM;
478 }
479 wlist->num_widgets = 1;
480 wlist->widgets[0] = w;
481
482 /* add dapm control with long name.
483 * for dapm_mixer this is the concatenation of the
484 * mixer and kcontrol name.
485 * for dapm_mixer_named_ctl this is simply the
486 * kcontrol name.
487 */
488 name_len = strlen(w->kcontrol_news[i].name) + 1;
489 if (w->id != snd_soc_dapm_mixer_named_ctl)
490 name_len += 1 + strlen(w->name);
491
492 path->long_name = kmalloc(name_len, GFP_KERNEL);
493
494 if (path->long_name == NULL) {
495 kfree(wlist);
496 return -ENOMEM;
497 }
498
499 switch (w->id) {
500 default:
501 /* The control will get a prefix from
502 * the control creation process but
503 * we're also using the same prefix
504 * for widgets so cut the prefix off
505 * the front of the widget name.
506 */
507 snprintf(path->long_name, name_len, "%s %s",
508 w->name + prefix_len,
509 w->kcontrol_news[i].name);
510 break;
511 case snd_soc_dapm_mixer_named_ctl:
512 snprintf(path->long_name, name_len, "%s",
513 w->kcontrol_news[i].name);
514 break;
515 }
516
517 path->long_name[name_len - 1] = '\0';
518
519 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
520 wlist, path->long_name,
521 prefix);
522 ret = snd_ctl_add(card, path->kcontrol);
523 if (ret < 0) {
524 dev_err(dapm->dev,
525 "asoc: failed to add dapm kcontrol %s: %d\n",
526 path->long_name, ret);
527 kfree(wlist);
528 kfree(path->long_name);
529 path->long_name = NULL;
530 return ret;
531 }
532 w->kcontrols[i] = path->kcontrol;
533 }
534 }
535 return ret;
536 }
537
538 /* create new dapm mux control */
539 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
540 {
541 struct snd_soc_dapm_context *dapm = w->dapm;
542 struct snd_soc_dapm_path *path = NULL;
543 struct snd_kcontrol *kcontrol;
544 struct snd_card *card = dapm->card->snd_card;
545 const char *prefix;
546 size_t prefix_len;
547 int ret;
548 struct snd_soc_dapm_widget_list *wlist;
549 int shared, wlistentries;
550 size_t wlistsize;
551 char *name;
552
553 if (w->num_kcontrols != 1) {
554 dev_err(dapm->dev,
555 "asoc: mux %s has incorrect number of controls\n",
556 w->name);
557 return -EINVAL;
558 }
559
560 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
561 &kcontrol);
562 if (kcontrol) {
563 wlist = kcontrol->private_data;
564 wlistentries = wlist->num_widgets + 1;
565 } else {
566 wlist = NULL;
567 wlistentries = 1;
568 }
569 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
570 wlistentries * sizeof(struct snd_soc_dapm_widget *),
571 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
572 if (wlist == NULL) {
573 dev_err(dapm->dev,
574 "asoc: can't allocate widget list for %s\n", w->name);
575 return -ENOMEM;
576 }
577 wlist->num_widgets = wlistentries;
578 wlist->widgets[wlistentries - 1] = w;
579
580 if (!kcontrol) {
581 if (dapm->codec)
582 prefix = dapm->codec->name_prefix;
583 else
584 prefix = NULL;
585
586 if (shared) {
587 name = w->kcontrol_news[0].name;
588 prefix_len = 0;
589 } else {
590 name = w->name;
591 if (prefix)
592 prefix_len = strlen(prefix) + 1;
593 else
594 prefix_len = 0;
595 }
596
597 /*
598 * The control will get a prefix from the control creation
599 * process but we're also using the same prefix for widgets so
600 * cut the prefix off the front of the widget name.
601 */
602 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
603 name + prefix_len, prefix);
604 ret = snd_ctl_add(card, kcontrol);
605 if (ret < 0) {
606 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
607 w->name, ret);
608 kfree(wlist);
609 return ret;
610 }
611 }
612
613 kcontrol->private_data = wlist;
614
615 w->kcontrols[0] = kcontrol;
616
617 list_for_each_entry(path, &w->sources, list_sink)
618 path->kcontrol = kcontrol;
619
620 return 0;
621 }
622
623 /* create new dapm volume control */
624 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
625 {
626 if (w->num_kcontrols)
627 dev_err(w->dapm->dev,
628 "asoc: PGA controls not supported: '%s'\n", w->name);
629
630 return 0;
631 }
632
633 /* reset 'walked' bit for each dapm path */
634 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
635 {
636 struct snd_soc_dapm_path *p;
637
638 list_for_each_entry(p, &dapm->card->paths, list)
639 p->walked = 0;
640 }
641
642 /* We implement power down on suspend by checking the power state of
643 * the ALSA card - when we are suspending the ALSA state for the card
644 * is set to D3.
645 */
646 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
647 {
648 int level = snd_power_get_state(widget->dapm->card->snd_card);
649
650 switch (level) {
651 case SNDRV_CTL_POWER_D3hot:
652 case SNDRV_CTL_POWER_D3cold:
653 if (widget->ignore_suspend)
654 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
655 widget->name);
656 return widget->ignore_suspend;
657 default:
658 return 1;
659 }
660 }
661
662 /*
663 * Recursively check for a completed path to an active or physically connected
664 * output widget. Returns number of complete paths.
665 */
666 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
667 {
668 struct snd_soc_dapm_path *path;
669 int con = 0;
670
671 if (widget->outputs >= 0)
672 return widget->outputs;
673
674 DAPM_UPDATE_STAT(widget, path_checks);
675
676 if (widget->id == snd_soc_dapm_supply)
677 return 0;
678
679 switch (widget->id) {
680 case snd_soc_dapm_adc:
681 case snd_soc_dapm_aif_out:
682 if (widget->active) {
683 widget->outputs = snd_soc_dapm_suspend_check(widget);
684 return widget->outputs;
685 }
686 default:
687 break;
688 }
689
690 if (widget->connected) {
691 /* connected pin ? */
692 if (widget->id == snd_soc_dapm_output && !widget->ext) {
693 widget->outputs = snd_soc_dapm_suspend_check(widget);
694 return widget->outputs;
695 }
696
697 /* connected jack or spk ? */
698 if (widget->id == snd_soc_dapm_hp ||
699 widget->id == snd_soc_dapm_spk ||
700 (widget->id == snd_soc_dapm_line &&
701 !list_empty(&widget->sources))) {
702 widget->outputs = snd_soc_dapm_suspend_check(widget);
703 return widget->outputs;
704 }
705 }
706
707 list_for_each_entry(path, &widget->sinks, list_source) {
708 DAPM_UPDATE_STAT(widget, neighbour_checks);
709
710 if (path->weak)
711 continue;
712
713 if (path->walked)
714 continue;
715
716 if (path->sink && path->connect) {
717 path->walked = 1;
718 con += is_connected_output_ep(path->sink);
719 }
720 }
721
722 widget->outputs = con;
723
724 return con;
725 }
726
727 /*
728 * Recursively check for a completed path to an active or physically connected
729 * input widget. Returns number of complete paths.
730 */
731 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
732 {
733 struct snd_soc_dapm_path *path;
734 int con = 0;
735
736 if (widget->inputs >= 0)
737 return widget->inputs;
738
739 DAPM_UPDATE_STAT(widget, path_checks);
740
741 if (widget->id == snd_soc_dapm_supply)
742 return 0;
743
744 /* active stream ? */
745 switch (widget->id) {
746 case snd_soc_dapm_dac:
747 case snd_soc_dapm_aif_in:
748 if (widget->active) {
749 widget->inputs = snd_soc_dapm_suspend_check(widget);
750 return widget->inputs;
751 }
752 default:
753 break;
754 }
755
756 if (widget->connected) {
757 /* connected pin ? */
758 if (widget->id == snd_soc_dapm_input && !widget->ext) {
759 widget->inputs = snd_soc_dapm_suspend_check(widget);
760 return widget->inputs;
761 }
762
763 /* connected VMID/Bias for lower pops */
764 if (widget->id == snd_soc_dapm_vmid) {
765 widget->inputs = snd_soc_dapm_suspend_check(widget);
766 return widget->inputs;
767 }
768
769 /* connected jack ? */
770 if (widget->id == snd_soc_dapm_mic ||
771 (widget->id == snd_soc_dapm_line &&
772 !list_empty(&widget->sinks))) {
773 widget->inputs = snd_soc_dapm_suspend_check(widget);
774 return widget->inputs;
775 }
776
777 /* signal generator */
778 if (widget->id == snd_soc_dapm_siggen) {
779 widget->inputs = snd_soc_dapm_suspend_check(widget);
780 return widget->inputs;
781 }
782 }
783
784 list_for_each_entry(path, &widget->sources, list_sink) {
785 DAPM_UPDATE_STAT(widget, neighbour_checks);
786
787 if (path->weak)
788 continue;
789
790 if (path->walked)
791 continue;
792
793 if (path->source && path->connect) {
794 path->walked = 1;
795 con += is_connected_input_ep(path->source);
796 }
797 }
798
799 widget->inputs = con;
800
801 return con;
802 }
803
804 /*
805 * Handler for generic register modifier widget.
806 */
807 int dapm_reg_event(struct snd_soc_dapm_widget *w,
808 struct snd_kcontrol *kcontrol, int event)
809 {
810 unsigned int val;
811
812 if (SND_SOC_DAPM_EVENT_ON(event))
813 val = w->on_val;
814 else
815 val = w->off_val;
816
817 soc_widget_update_bits(w, -(w->reg + 1),
818 w->mask << w->shift, val << w->shift);
819
820 return 0;
821 }
822 EXPORT_SYMBOL_GPL(dapm_reg_event);
823
824 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
825 {
826 if (w->power_checked)
827 return w->new_power;
828
829 if (w->force)
830 w->new_power = 1;
831 else
832 w->new_power = w->power_check(w);
833
834 w->power_checked = true;
835
836 return w->new_power;
837 }
838
839 /* Generic check to see if a widget should be powered.
840 */
841 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
842 {
843 int in, out;
844
845 DAPM_UPDATE_STAT(w, power_checks);
846
847 in = is_connected_input_ep(w);
848 dapm_clear_walk(w->dapm);
849 out = is_connected_output_ep(w);
850 dapm_clear_walk(w->dapm);
851 return out != 0 && in != 0;
852 }
853
854 /* Check to see if an ADC has power */
855 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
856 {
857 int in;
858
859 DAPM_UPDATE_STAT(w, power_checks);
860
861 if (w->active) {
862 in = is_connected_input_ep(w);
863 dapm_clear_walk(w->dapm);
864 return in != 0;
865 } else {
866 return dapm_generic_check_power(w);
867 }
868 }
869
870 /* Check to see if a DAC has power */
871 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
872 {
873 int out;
874
875 DAPM_UPDATE_STAT(w, power_checks);
876
877 if (w->active) {
878 out = is_connected_output_ep(w);
879 dapm_clear_walk(w->dapm);
880 return out != 0;
881 } else {
882 return dapm_generic_check_power(w);
883 }
884 }
885
886 /* Check to see if a power supply is needed */
887 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
888 {
889 struct snd_soc_dapm_path *path;
890
891 DAPM_UPDATE_STAT(w, power_checks);
892
893 /* Check if one of our outputs is connected */
894 list_for_each_entry(path, &w->sinks, list_source) {
895 DAPM_UPDATE_STAT(w, neighbour_checks);
896
897 if (path->weak)
898 continue;
899
900 if (path->connected &&
901 !path->connected(path->source, path->sink))
902 continue;
903
904 if (!path->sink)
905 continue;
906
907 if (dapm_widget_power_check(path->sink))
908 return 1;
909 }
910
911 dapm_clear_walk(w->dapm);
912
913 return 0;
914 }
915
916 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
917 {
918 return 1;
919 }
920
921 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
922 struct snd_soc_dapm_widget *b,
923 bool power_up)
924 {
925 int *sort;
926
927 if (power_up)
928 sort = dapm_up_seq;
929 else
930 sort = dapm_down_seq;
931
932 if (sort[a->id] != sort[b->id])
933 return sort[a->id] - sort[b->id];
934 if (a->subseq != b->subseq) {
935 if (power_up)
936 return a->subseq - b->subseq;
937 else
938 return b->subseq - a->subseq;
939 }
940 if (a->reg != b->reg)
941 return a->reg - b->reg;
942 if (a->dapm != b->dapm)
943 return (unsigned long)a->dapm - (unsigned long)b->dapm;
944
945 return 0;
946 }
947
948 /* Insert a widget in order into a DAPM power sequence. */
949 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
950 struct list_head *list,
951 bool power_up)
952 {
953 struct snd_soc_dapm_widget *w;
954
955 list_for_each_entry(w, list, power_list)
956 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
957 list_add_tail(&new_widget->power_list, &w->power_list);
958 return;
959 }
960
961 list_add_tail(&new_widget->power_list, list);
962 }
963
964 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
965 struct snd_soc_dapm_widget *w, int event)
966 {
967 struct snd_soc_card *card = dapm->card;
968 const char *ev_name;
969 int power, ret;
970
971 switch (event) {
972 case SND_SOC_DAPM_PRE_PMU:
973 ev_name = "PRE_PMU";
974 power = 1;
975 break;
976 case SND_SOC_DAPM_POST_PMU:
977 ev_name = "POST_PMU";
978 power = 1;
979 break;
980 case SND_SOC_DAPM_PRE_PMD:
981 ev_name = "PRE_PMD";
982 power = 0;
983 break;
984 case SND_SOC_DAPM_POST_PMD:
985 ev_name = "POST_PMD";
986 power = 0;
987 break;
988 default:
989 BUG();
990 return;
991 }
992
993 if (w->power != power)
994 return;
995
996 if (w->event && (w->event_flags & event)) {
997 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
998 w->name, ev_name);
999 trace_snd_soc_dapm_widget_event_start(w, event);
1000 ret = w->event(w, NULL, event);
1001 trace_snd_soc_dapm_widget_event_done(w, event);
1002 if (ret < 0)
1003 pr_err("%s: %s event failed: %d\n",
1004 ev_name, w->name, ret);
1005 }
1006 }
1007
1008 /* Apply the coalesced changes from a DAPM sequence */
1009 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
1010 struct list_head *pending)
1011 {
1012 struct snd_soc_card *card = dapm->card;
1013 struct snd_soc_dapm_widget *w;
1014 int reg, power;
1015 unsigned int value = 0;
1016 unsigned int mask = 0;
1017 unsigned int cur_mask;
1018
1019 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1020 power_list)->reg;
1021
1022 list_for_each_entry(w, pending, power_list) {
1023 cur_mask = 1 << w->shift;
1024 BUG_ON(reg != w->reg);
1025
1026 if (w->invert)
1027 power = !w->power;
1028 else
1029 power = w->power;
1030
1031 mask |= cur_mask;
1032 if (power)
1033 value |= cur_mask;
1034
1035 pop_dbg(dapm->dev, card->pop_time,
1036 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1037 w->name, reg, value, mask);
1038
1039 /* Check for events */
1040 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1041 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1042 }
1043
1044 if (reg >= 0) {
1045 /* Any widget will do, they should all be updating the
1046 * same register.
1047 */
1048 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1049 power_list);
1050
1051 pop_dbg(dapm->dev, card->pop_time,
1052 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1053 value, mask, reg, card->pop_time);
1054 pop_wait(card->pop_time);
1055 soc_widget_update_bits(w, reg, mask, value);
1056 }
1057
1058 list_for_each_entry(w, pending, power_list) {
1059 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1060 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1061 }
1062 }
1063
1064 /* Apply a DAPM power sequence.
1065 *
1066 * We walk over a pre-sorted list of widgets to apply power to. In
1067 * order to minimise the number of writes to the device required
1068 * multiple widgets will be updated in a single write where possible.
1069 * Currently anything that requires more than a single write is not
1070 * handled.
1071 */
1072 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1073 struct list_head *list, int event, bool power_up)
1074 {
1075 struct snd_soc_dapm_widget *w, *n;
1076 LIST_HEAD(pending);
1077 int cur_sort = -1;
1078 int cur_subseq = -1;
1079 int cur_reg = SND_SOC_NOPM;
1080 struct snd_soc_dapm_context *cur_dapm = NULL;
1081 int ret, i;
1082 int *sort;
1083
1084 if (power_up)
1085 sort = dapm_up_seq;
1086 else
1087 sort = dapm_down_seq;
1088
1089 list_for_each_entry_safe(w, n, list, power_list) {
1090 ret = 0;
1091
1092 /* Do we need to apply any queued changes? */
1093 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1094 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1095 if (!list_empty(&pending))
1096 dapm_seq_run_coalesced(cur_dapm, &pending);
1097
1098 if (cur_dapm && cur_dapm->seq_notifier) {
1099 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1100 if (sort[i] == cur_sort)
1101 cur_dapm->seq_notifier(cur_dapm,
1102 i,
1103 cur_subseq);
1104 }
1105
1106 INIT_LIST_HEAD(&pending);
1107 cur_sort = -1;
1108 cur_subseq = INT_MIN;
1109 cur_reg = SND_SOC_NOPM;
1110 cur_dapm = NULL;
1111 }
1112
1113 switch (w->id) {
1114 case snd_soc_dapm_pre:
1115 if (!w->event)
1116 list_for_each_entry_safe_continue(w, n, list,
1117 power_list);
1118
1119 if (event == SND_SOC_DAPM_STREAM_START)
1120 ret = w->event(w,
1121 NULL, SND_SOC_DAPM_PRE_PMU);
1122 else if (event == SND_SOC_DAPM_STREAM_STOP)
1123 ret = w->event(w,
1124 NULL, SND_SOC_DAPM_PRE_PMD);
1125 break;
1126
1127 case snd_soc_dapm_post:
1128 if (!w->event)
1129 list_for_each_entry_safe_continue(w, n, list,
1130 power_list);
1131
1132 if (event == SND_SOC_DAPM_STREAM_START)
1133 ret = w->event(w,
1134 NULL, SND_SOC_DAPM_POST_PMU);
1135 else if (event == SND_SOC_DAPM_STREAM_STOP)
1136 ret = w->event(w,
1137 NULL, SND_SOC_DAPM_POST_PMD);
1138 break;
1139
1140 default:
1141 /* Queue it up for application */
1142 cur_sort = sort[w->id];
1143 cur_subseq = w->subseq;
1144 cur_reg = w->reg;
1145 cur_dapm = w->dapm;
1146 list_move(&w->power_list, &pending);
1147 break;
1148 }
1149
1150 if (ret < 0)
1151 dev_err(w->dapm->dev,
1152 "Failed to apply widget power: %d\n", ret);
1153 }
1154
1155 if (!list_empty(&pending))
1156 dapm_seq_run_coalesced(cur_dapm, &pending);
1157
1158 if (cur_dapm && cur_dapm->seq_notifier) {
1159 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1160 if (sort[i] == cur_sort)
1161 cur_dapm->seq_notifier(cur_dapm,
1162 i, cur_subseq);
1163 }
1164 }
1165
1166 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1167 {
1168 struct snd_soc_dapm_update *update = dapm->update;
1169 struct snd_soc_dapm_widget *w;
1170 int ret;
1171
1172 if (!update)
1173 return;
1174
1175 w = update->widget;
1176
1177 if (w->event &&
1178 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1179 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1180 if (ret != 0)
1181 pr_err("%s DAPM pre-event failed: %d\n",
1182 w->name, ret);
1183 }
1184
1185 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1186 update->val);
1187 if (ret < 0)
1188 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1189
1190 if (w->event &&
1191 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1192 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1193 if (ret != 0)
1194 pr_err("%s DAPM post-event failed: %d\n",
1195 w->name, ret);
1196 }
1197 }
1198
1199 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1200 * they're changing state.
1201 */
1202 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1203 {
1204 struct snd_soc_dapm_context *d = data;
1205 int ret;
1206
1207 /* If we're off and we're not supposed to be go into STANDBY */
1208 if (d->bias_level == SND_SOC_BIAS_OFF &&
1209 d->target_bias_level != SND_SOC_BIAS_OFF) {
1210 if (d->dev)
1211 pm_runtime_get_sync(d->dev);
1212
1213 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1214 if (ret != 0)
1215 dev_err(d->dev,
1216 "Failed to turn on bias: %d\n", ret);
1217 }
1218
1219 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1220 if (d->bias_level != d->target_bias_level) {
1221 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1222 if (ret != 0)
1223 dev_err(d->dev,
1224 "Failed to prepare bias: %d\n", ret);
1225 }
1226 }
1227
1228 /* Async callback run prior to DAPM sequences - brings to their final
1229 * state.
1230 */
1231 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1232 {
1233 struct snd_soc_dapm_context *d = data;
1234 int ret;
1235
1236 /* If we just powered the last thing off drop to standby bias */
1237 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1238 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1239 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1240 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1241 if (ret != 0)
1242 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1243 ret);
1244 }
1245
1246 /* If we're in standby and can support bias off then do that */
1247 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1248 d->target_bias_level == SND_SOC_BIAS_OFF) {
1249 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1250 if (ret != 0)
1251 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1252
1253 if (d->dev)
1254 pm_runtime_put_sync(d->dev);
1255 }
1256
1257 /* If we just powered up then move to active bias */
1258 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1259 d->target_bias_level == SND_SOC_BIAS_ON) {
1260 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1261 if (ret != 0)
1262 dev_err(d->dev, "Failed to apply active bias: %d\n",
1263 ret);
1264 }
1265 }
1266
1267 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1268 bool power, bool connect)
1269 {
1270 /* If a connection is being made or broken then that update
1271 * will have marked the peer dirty, otherwise the widgets are
1272 * not connected and this update has no impact. */
1273 if (!connect)
1274 return;
1275
1276 /* If the peer is already in the state we're moving to then we
1277 * won't have an impact on it. */
1278 if (power != peer->power)
1279 dapm_mark_dirty(peer, "peer state change");
1280 }
1281
1282 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1283 struct list_head *up_list,
1284 struct list_head *down_list)
1285 {
1286 struct snd_soc_dapm_path *path;
1287
1288 if (w->power == power)
1289 return;
1290
1291 trace_snd_soc_dapm_widget_power(w, power);
1292
1293 /* If we changed our power state perhaps our neigbours changed
1294 * also.
1295 */
1296 list_for_each_entry(path, &w->sources, list_sink) {
1297 if (path->source) {
1298 dapm_widget_set_peer_power(path->source, power,
1299 path->connect);
1300 }
1301 }
1302 switch (w->id) {
1303 case snd_soc_dapm_supply:
1304 /* Supplies can't affect their outputs, only their inputs */
1305 break;
1306 default:
1307 list_for_each_entry(path, &w->sinks, list_source) {
1308 if (path->sink) {
1309 dapm_widget_set_peer_power(path->sink, power,
1310 path->connect);
1311 }
1312 }
1313 break;
1314 }
1315
1316 if (power)
1317 dapm_seq_insert(w, up_list, true);
1318 else
1319 dapm_seq_insert(w, down_list, false);
1320
1321 w->power = power;
1322 }
1323
1324 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1325 struct list_head *up_list,
1326 struct list_head *down_list)
1327 {
1328 int power;
1329
1330 switch (w->id) {
1331 case snd_soc_dapm_pre:
1332 dapm_seq_insert(w, down_list, false);
1333 break;
1334 case snd_soc_dapm_post:
1335 dapm_seq_insert(w, up_list, true);
1336 break;
1337
1338 default:
1339 power = dapm_widget_power_check(w);
1340
1341 dapm_widget_set_power(w, power, up_list, down_list);
1342 break;
1343 }
1344 }
1345
1346 /*
1347 * Scan each dapm widget for complete audio path.
1348 * A complete path is a route that has valid endpoints i.e.:-
1349 *
1350 * o DAC to output pin.
1351 * o Input Pin to ADC.
1352 * o Input pin to Output pin (bypass, sidetone)
1353 * o DAC to ADC (loopback).
1354 */
1355 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1356 {
1357 struct snd_soc_card *card = dapm->card;
1358 struct snd_soc_dapm_widget *w;
1359 struct snd_soc_dapm_context *d;
1360 LIST_HEAD(up_list);
1361 LIST_HEAD(down_list);
1362 LIST_HEAD(async_domain);
1363 enum snd_soc_bias_level bias;
1364
1365 trace_snd_soc_dapm_start(card);
1366
1367 list_for_each_entry(d, &card->dapm_list, list) {
1368 if (d->n_widgets || d->codec == NULL) {
1369 if (d->idle_bias_off)
1370 d->target_bias_level = SND_SOC_BIAS_OFF;
1371 else
1372 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1373 }
1374 }
1375
1376 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
1377
1378 list_for_each_entry(w, &card->widgets, list) {
1379 w->power_checked = false;
1380 w->inputs = -1;
1381 w->outputs = -1;
1382 }
1383
1384 /* Check which widgets we need to power and store them in
1385 * lists indicating if they should be powered up or down. We
1386 * only check widgets that have been flagged as dirty but note
1387 * that new widgets may be added to the dirty list while we
1388 * iterate.
1389 */
1390 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1391 dapm_power_one_widget(w, &up_list, &down_list);
1392 }
1393
1394 list_for_each_entry(w, &card->widgets, list) {
1395 list_del_init(&w->dirty);
1396
1397 if (w->power) {
1398 d = w->dapm;
1399
1400 /* Supplies and micbiases only bring the
1401 * context up to STANDBY as unless something
1402 * else is active and passing audio they
1403 * generally don't require full power.
1404 */
1405 switch (w->id) {
1406 case snd_soc_dapm_supply:
1407 case snd_soc_dapm_micbias:
1408 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1409 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1410 break;
1411 default:
1412 d->target_bias_level = SND_SOC_BIAS_ON;
1413 break;
1414 }
1415 }
1416
1417 }
1418
1419 /* If there are no DAPM widgets then try to figure out power from the
1420 * event type.
1421 */
1422 if (!dapm->n_widgets) {
1423 switch (event) {
1424 case SND_SOC_DAPM_STREAM_START:
1425 case SND_SOC_DAPM_STREAM_RESUME:
1426 dapm->target_bias_level = SND_SOC_BIAS_ON;
1427 break;
1428 case SND_SOC_DAPM_STREAM_STOP:
1429 if (dapm->codec->active)
1430 dapm->target_bias_level = SND_SOC_BIAS_ON;
1431 else
1432 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1433 break;
1434 case SND_SOC_DAPM_STREAM_SUSPEND:
1435 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1436 break;
1437 case SND_SOC_DAPM_STREAM_NOP:
1438 dapm->target_bias_level = dapm->bias_level;
1439 break;
1440 default:
1441 break;
1442 }
1443 }
1444
1445 /* Force all contexts in the card to the same bias state if
1446 * they're not ground referenced.
1447 */
1448 bias = SND_SOC_BIAS_OFF;
1449 list_for_each_entry(d, &card->dapm_list, list)
1450 if (d->target_bias_level > bias)
1451 bias = d->target_bias_level;
1452 list_for_each_entry(d, &card->dapm_list, list)
1453 if (!d->idle_bias_off)
1454 d->target_bias_level = bias;
1455
1456 trace_snd_soc_dapm_walk_done(card);
1457
1458 /* Run all the bias changes in parallel */
1459 list_for_each_entry(d, &dapm->card->dapm_list, list)
1460 async_schedule_domain(dapm_pre_sequence_async, d,
1461 &async_domain);
1462 async_synchronize_full_domain(&async_domain);
1463
1464 /* Power down widgets first; try to avoid amplifying pops. */
1465 dapm_seq_run(dapm, &down_list, event, false);
1466
1467 dapm_widget_update(dapm);
1468
1469 /* Now power up. */
1470 dapm_seq_run(dapm, &up_list, event, true);
1471
1472 /* Run all the bias changes in parallel */
1473 list_for_each_entry(d, &dapm->card->dapm_list, list)
1474 async_schedule_domain(dapm_post_sequence_async, d,
1475 &async_domain);
1476 async_synchronize_full_domain(&async_domain);
1477
1478 pop_dbg(dapm->dev, card->pop_time,
1479 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1480 pop_wait(card->pop_time);
1481
1482 trace_snd_soc_dapm_done(card);
1483
1484 return 0;
1485 }
1486
1487 #ifdef CONFIG_DEBUG_FS
1488 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1489 {
1490 file->private_data = inode->i_private;
1491 return 0;
1492 }
1493
1494 static ssize_t dapm_widget_power_read_file(struct file *file,
1495 char __user *user_buf,
1496 size_t count, loff_t *ppos)
1497 {
1498 struct snd_soc_dapm_widget *w = file->private_data;
1499 char *buf;
1500 int in, out;
1501 ssize_t ret;
1502 struct snd_soc_dapm_path *p = NULL;
1503
1504 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1505 if (!buf)
1506 return -ENOMEM;
1507
1508 in = is_connected_input_ep(w);
1509 dapm_clear_walk(w->dapm);
1510 out = is_connected_output_ep(w);
1511 dapm_clear_walk(w->dapm);
1512
1513 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1514 w->name, w->power ? "On" : "Off", in, out);
1515
1516 if (w->reg >= 0)
1517 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1518 " - R%d(0x%x) bit %d",
1519 w->reg, w->reg, w->shift);
1520
1521 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1522
1523 if (w->sname)
1524 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1525 w->sname,
1526 w->active ? "active" : "inactive");
1527
1528 list_for_each_entry(p, &w->sources, list_sink) {
1529 if (p->connected && !p->connected(w, p->sink))
1530 continue;
1531
1532 if (p->connect)
1533 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1534 " in \"%s\" \"%s\"\n",
1535 p->name ? p->name : "static",
1536 p->source->name);
1537 }
1538 list_for_each_entry(p, &w->sinks, list_source) {
1539 if (p->connected && !p->connected(w, p->sink))
1540 continue;
1541
1542 if (p->connect)
1543 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1544 " out \"%s\" \"%s\"\n",
1545 p->name ? p->name : "static",
1546 p->sink->name);
1547 }
1548
1549 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1550
1551 kfree(buf);
1552 return ret;
1553 }
1554
1555 static const struct file_operations dapm_widget_power_fops = {
1556 .open = dapm_widget_power_open_file,
1557 .read = dapm_widget_power_read_file,
1558 .llseek = default_llseek,
1559 };
1560
1561 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1562 {
1563 file->private_data = inode->i_private;
1564 return 0;
1565 }
1566
1567 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1568 size_t count, loff_t *ppos)
1569 {
1570 struct snd_soc_dapm_context *dapm = file->private_data;
1571 char *level;
1572
1573 switch (dapm->bias_level) {
1574 case SND_SOC_BIAS_ON:
1575 level = "On\n";
1576 break;
1577 case SND_SOC_BIAS_PREPARE:
1578 level = "Prepare\n";
1579 break;
1580 case SND_SOC_BIAS_STANDBY:
1581 level = "Standby\n";
1582 break;
1583 case SND_SOC_BIAS_OFF:
1584 level = "Off\n";
1585 break;
1586 default:
1587 BUG();
1588 level = "Unknown\n";
1589 break;
1590 }
1591
1592 return simple_read_from_buffer(user_buf, count, ppos, level,
1593 strlen(level));
1594 }
1595
1596 static const struct file_operations dapm_bias_fops = {
1597 .open = dapm_bias_open_file,
1598 .read = dapm_bias_read_file,
1599 .llseek = default_llseek,
1600 };
1601
1602 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1603 struct dentry *parent)
1604 {
1605 struct dentry *d;
1606
1607 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1608
1609 if (!dapm->debugfs_dapm) {
1610 printk(KERN_WARNING
1611 "Failed to create DAPM debugfs directory\n");
1612 return;
1613 }
1614
1615 d = debugfs_create_file("bias_level", 0444,
1616 dapm->debugfs_dapm, dapm,
1617 &dapm_bias_fops);
1618 if (!d)
1619 dev_warn(dapm->dev,
1620 "ASoC: Failed to create bias level debugfs file\n");
1621 }
1622
1623 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1624 {
1625 struct snd_soc_dapm_context *dapm = w->dapm;
1626 struct dentry *d;
1627
1628 if (!dapm->debugfs_dapm || !w->name)
1629 return;
1630
1631 d = debugfs_create_file(w->name, 0444,
1632 dapm->debugfs_dapm, w,
1633 &dapm_widget_power_fops);
1634 if (!d)
1635 dev_warn(w->dapm->dev,
1636 "ASoC: Failed to create %s debugfs file\n",
1637 w->name);
1638 }
1639
1640 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1641 {
1642 debugfs_remove_recursive(dapm->debugfs_dapm);
1643 }
1644
1645 #else
1646 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1647 struct dentry *parent)
1648 {
1649 }
1650
1651 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1652 {
1653 }
1654
1655 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1656 {
1657 }
1658
1659 #endif
1660
1661 /* test and update the power status of a mux widget */
1662 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1663 struct snd_kcontrol *kcontrol, int change,
1664 int mux, struct soc_enum *e)
1665 {
1666 struct snd_soc_dapm_path *path;
1667 int found = 0;
1668
1669 if (widget->id != snd_soc_dapm_mux &&
1670 widget->id != snd_soc_dapm_virt_mux &&
1671 widget->id != snd_soc_dapm_value_mux)
1672 return -ENODEV;
1673
1674 if (!change)
1675 return 0;
1676
1677 /* find dapm widget path assoc with kcontrol */
1678 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1679 if (path->kcontrol != kcontrol)
1680 continue;
1681
1682 if (!path->name || !e->texts[mux])
1683 continue;
1684
1685 found = 1;
1686 /* we now need to match the string in the enum to the path */
1687 if (!(strcmp(path->name, e->texts[mux]))) {
1688 path->connect = 1; /* new connection */
1689 dapm_mark_dirty(path->source, "mux connection");
1690 } else {
1691 if (path->connect)
1692 dapm_mark_dirty(path->source,
1693 "mux disconnection");
1694 path->connect = 0; /* old connection must be powered down */
1695 }
1696 }
1697
1698 if (found) {
1699 dapm_mark_dirty(widget, "mux change");
1700 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1701 }
1702
1703 return 0;
1704 }
1705
1706 /* test and update the power status of a mixer or switch widget */
1707 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1708 struct snd_kcontrol *kcontrol, int connect)
1709 {
1710 struct snd_soc_dapm_path *path;
1711 int found = 0;
1712
1713 if (widget->id != snd_soc_dapm_mixer &&
1714 widget->id != snd_soc_dapm_mixer_named_ctl &&
1715 widget->id != snd_soc_dapm_switch)
1716 return -ENODEV;
1717
1718 /* find dapm widget path assoc with kcontrol */
1719 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1720 if (path->kcontrol != kcontrol)
1721 continue;
1722
1723 /* found, now check type */
1724 found = 1;
1725 path->connect = connect;
1726 dapm_mark_dirty(path->source, "mixer connection");
1727 }
1728
1729 if (found) {
1730 dapm_mark_dirty(widget, "mixer update");
1731 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1732 }
1733
1734 return 0;
1735 }
1736
1737 /* show dapm widget status in sys fs */
1738 static ssize_t dapm_widget_show(struct device *dev,
1739 struct device_attribute *attr, char *buf)
1740 {
1741 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
1742 struct snd_soc_codec *codec =rtd->codec;
1743 struct snd_soc_dapm_widget *w;
1744 int count = 0;
1745 char *state = "not set";
1746
1747 list_for_each_entry(w, &codec->card->widgets, list) {
1748 if (w->dapm != &codec->dapm)
1749 continue;
1750
1751 /* only display widgets that burnm power */
1752 switch (w->id) {
1753 case snd_soc_dapm_hp:
1754 case snd_soc_dapm_mic:
1755 case snd_soc_dapm_spk:
1756 case snd_soc_dapm_line:
1757 case snd_soc_dapm_micbias:
1758 case snd_soc_dapm_dac:
1759 case snd_soc_dapm_adc:
1760 case snd_soc_dapm_pga:
1761 case snd_soc_dapm_out_drv:
1762 case snd_soc_dapm_mixer:
1763 case snd_soc_dapm_mixer_named_ctl:
1764 case snd_soc_dapm_supply:
1765 if (w->name)
1766 count += sprintf(buf + count, "%s: %s\n",
1767 w->name, w->power ? "On":"Off");
1768 break;
1769 default:
1770 break;
1771 }
1772 }
1773
1774 switch (codec->dapm.bias_level) {
1775 case SND_SOC_BIAS_ON:
1776 state = "On";
1777 break;
1778 case SND_SOC_BIAS_PREPARE:
1779 state = "Prepare";
1780 break;
1781 case SND_SOC_BIAS_STANDBY:
1782 state = "Standby";
1783 break;
1784 case SND_SOC_BIAS_OFF:
1785 state = "Off";
1786 break;
1787 }
1788 count += sprintf(buf + count, "PM State: %s\n", state);
1789
1790 return count;
1791 }
1792
1793 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1794
1795 int snd_soc_dapm_sys_add(struct device *dev)
1796 {
1797 return device_create_file(dev, &dev_attr_dapm_widget);
1798 }
1799
1800 static void snd_soc_dapm_sys_remove(struct device *dev)
1801 {
1802 device_remove_file(dev, &dev_attr_dapm_widget);
1803 }
1804
1805 /* free all dapm widgets and resources */
1806 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1807 {
1808 struct snd_soc_dapm_widget *w, *next_w;
1809 struct snd_soc_dapm_path *p, *next_p;
1810
1811 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1812 if (w->dapm != dapm)
1813 continue;
1814 list_del(&w->list);
1815 /*
1816 * remove source and sink paths associated to this widget.
1817 * While removing the path, remove reference to it from both
1818 * source and sink widgets so that path is removed only once.
1819 */
1820 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1821 list_del(&p->list_sink);
1822 list_del(&p->list_source);
1823 list_del(&p->list);
1824 kfree(p->long_name);
1825 kfree(p);
1826 }
1827 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1828 list_del(&p->list_sink);
1829 list_del(&p->list_source);
1830 list_del(&p->list);
1831 kfree(p->long_name);
1832 kfree(p);
1833 }
1834 kfree(w->kcontrols);
1835 kfree(w->name);
1836 kfree(w);
1837 }
1838 }
1839
1840 static struct snd_soc_dapm_widget *dapm_find_widget(
1841 struct snd_soc_dapm_context *dapm, const char *pin,
1842 bool search_other_contexts)
1843 {
1844 struct snd_soc_dapm_widget *w;
1845 struct snd_soc_dapm_widget *fallback = NULL;
1846
1847 list_for_each_entry(w, &dapm->card->widgets, list) {
1848 if (!strcmp(w->name, pin)) {
1849 if (w->dapm == dapm)
1850 return w;
1851 else
1852 fallback = w;
1853 }
1854 }
1855
1856 if (search_other_contexts)
1857 return fallback;
1858
1859 return NULL;
1860 }
1861
1862 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1863 const char *pin, int status)
1864 {
1865 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1866
1867 if (!w) {
1868 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1869 return -EINVAL;
1870 }
1871
1872 w->connected = status;
1873 if (status == 0)
1874 w->force = 0;
1875 dapm_mark_dirty(w, "pin configuration");
1876
1877 return 0;
1878 }
1879
1880 /**
1881 * snd_soc_dapm_sync - scan and power dapm paths
1882 * @dapm: DAPM context
1883 *
1884 * Walks all dapm audio paths and powers widgets according to their
1885 * stream or path usage.
1886 *
1887 * Returns 0 for success.
1888 */
1889 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1890 {
1891 /*
1892 * Suppress early reports (eg, jacks syncing their state) to avoid
1893 * silly DAPM runs during card startup.
1894 */
1895 if (!dapm->card || !dapm->card->instantiated)
1896 return 0;
1897
1898 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1899 }
1900 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1901
1902 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1903 const struct snd_soc_dapm_route *route)
1904 {
1905 struct snd_soc_dapm_path *path;
1906 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1907 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1908 const char *sink;
1909 const char *control = route->control;
1910 const char *source;
1911 char prefixed_sink[80];
1912 char prefixed_source[80];
1913 int ret = 0;
1914
1915 if (dapm->codec && dapm->codec->name_prefix) {
1916 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1917 dapm->codec->name_prefix, route->sink);
1918 sink = prefixed_sink;
1919 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1920 dapm->codec->name_prefix, route->source);
1921 source = prefixed_source;
1922 } else {
1923 sink = route->sink;
1924 source = route->source;
1925 }
1926
1927 /*
1928 * find src and dest widgets over all widgets but favor a widget from
1929 * current DAPM context
1930 */
1931 list_for_each_entry(w, &dapm->card->widgets, list) {
1932 if (!wsink && !(strcmp(w->name, sink))) {
1933 wtsink = w;
1934 if (w->dapm == dapm)
1935 wsink = w;
1936 continue;
1937 }
1938 if (!wsource && !(strcmp(w->name, source))) {
1939 wtsource = w;
1940 if (w->dapm == dapm)
1941 wsource = w;
1942 }
1943 }
1944 /* use widget from another DAPM context if not found from this */
1945 if (!wsink)
1946 wsink = wtsink;
1947 if (!wsource)
1948 wsource = wtsource;
1949
1950 if (wsource == NULL || wsink == NULL)
1951 return -ENODEV;
1952
1953 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1954 if (!path)
1955 return -ENOMEM;
1956
1957 path->source = wsource;
1958 path->sink = wsink;
1959 path->connected = route->connected;
1960 INIT_LIST_HEAD(&path->list);
1961 INIT_LIST_HEAD(&path->list_source);
1962 INIT_LIST_HEAD(&path->list_sink);
1963
1964 /* check for external widgets */
1965 if (wsink->id == snd_soc_dapm_input) {
1966 if (wsource->id == snd_soc_dapm_micbias ||
1967 wsource->id == snd_soc_dapm_mic ||
1968 wsource->id == snd_soc_dapm_line ||
1969 wsource->id == snd_soc_dapm_output)
1970 wsink->ext = 1;
1971 }
1972 if (wsource->id == snd_soc_dapm_output) {
1973 if (wsink->id == snd_soc_dapm_spk ||
1974 wsink->id == snd_soc_dapm_hp ||
1975 wsink->id == snd_soc_dapm_line ||
1976 wsink->id == snd_soc_dapm_input)
1977 wsource->ext = 1;
1978 }
1979
1980 /* connect static paths */
1981 if (control == NULL) {
1982 list_add(&path->list, &dapm->card->paths);
1983 list_add(&path->list_sink, &wsink->sources);
1984 list_add(&path->list_source, &wsource->sinks);
1985 path->connect = 1;
1986 return 0;
1987 }
1988
1989 /* connect dynamic paths */
1990 switch (wsink->id) {
1991 case snd_soc_dapm_adc:
1992 case snd_soc_dapm_dac:
1993 case snd_soc_dapm_pga:
1994 case snd_soc_dapm_out_drv:
1995 case snd_soc_dapm_input:
1996 case snd_soc_dapm_output:
1997 case snd_soc_dapm_siggen:
1998 case snd_soc_dapm_micbias:
1999 case snd_soc_dapm_vmid:
2000 case snd_soc_dapm_pre:
2001 case snd_soc_dapm_post:
2002 case snd_soc_dapm_supply:
2003 case snd_soc_dapm_aif_in:
2004 case snd_soc_dapm_aif_out:
2005 list_add(&path->list, &dapm->card->paths);
2006 list_add(&path->list_sink, &wsink->sources);
2007 list_add(&path->list_source, &wsource->sinks);
2008 path->connect = 1;
2009 return 0;
2010 case snd_soc_dapm_mux:
2011 case snd_soc_dapm_virt_mux:
2012 case snd_soc_dapm_value_mux:
2013 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2014 &wsink->kcontrol_news[0]);
2015 if (ret != 0)
2016 goto err;
2017 break;
2018 case snd_soc_dapm_switch:
2019 case snd_soc_dapm_mixer:
2020 case snd_soc_dapm_mixer_named_ctl:
2021 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2022 if (ret != 0)
2023 goto err;
2024 break;
2025 case snd_soc_dapm_hp:
2026 case snd_soc_dapm_mic:
2027 case snd_soc_dapm_line:
2028 case snd_soc_dapm_spk:
2029 list_add(&path->list, &dapm->card->paths);
2030 list_add(&path->list_sink, &wsink->sources);
2031 list_add(&path->list_source, &wsource->sinks);
2032 path->connect = 0;
2033 return 0;
2034 }
2035 return 0;
2036
2037 err:
2038 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
2039 source, control, sink);
2040 kfree(path);
2041 return ret;
2042 }
2043
2044 /**
2045 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2046 * @dapm: DAPM context
2047 * @route: audio routes
2048 * @num: number of routes
2049 *
2050 * Connects 2 dapm widgets together via a named audio path. The sink is
2051 * the widget receiving the audio signal, whilst the source is the sender
2052 * of the audio signal.
2053 *
2054 * Returns 0 for success else error. On error all resources can be freed
2055 * with a call to snd_soc_card_free().
2056 */
2057 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2058 const struct snd_soc_dapm_route *route, int num)
2059 {
2060 int i, ret;
2061
2062 for (i = 0; i < num; i++) {
2063 ret = snd_soc_dapm_add_route(dapm, route);
2064 if (ret < 0) {
2065 dev_err(dapm->dev, "Failed to add route %s->%s\n",
2066 route->source, route->sink);
2067 return ret;
2068 }
2069 route++;
2070 }
2071
2072 return 0;
2073 }
2074 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2075
2076 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2077 const struct snd_soc_dapm_route *route)
2078 {
2079 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2080 route->source,
2081 true);
2082 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2083 route->sink,
2084 true);
2085 struct snd_soc_dapm_path *path;
2086 int count = 0;
2087
2088 if (!source) {
2089 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
2090 route->source);
2091 return -ENODEV;
2092 }
2093
2094 if (!sink) {
2095 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
2096 route->sink);
2097 return -ENODEV;
2098 }
2099
2100 if (route->control || route->connected)
2101 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
2102 route->source, route->sink);
2103
2104 list_for_each_entry(path, &source->sinks, list_source) {
2105 if (path->sink == sink) {
2106 path->weak = 1;
2107 count++;
2108 }
2109 }
2110
2111 if (count == 0)
2112 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
2113 route->source, route->sink);
2114 if (count > 1)
2115 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
2116 count, route->source, route->sink);
2117
2118 return 0;
2119 }
2120
2121 /**
2122 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2123 * @dapm: DAPM context
2124 * @route: audio routes
2125 * @num: number of routes
2126 *
2127 * Mark existing routes matching those specified in the passed array
2128 * as being weak, meaning that they are ignored for the purpose of
2129 * power decisions. The main intended use case is for sidetone paths
2130 * which couple audio between other independent paths if they are both
2131 * active in order to make the combination work better at the user
2132 * level but which aren't intended to be "used".
2133 *
2134 * Note that CODEC drivers should not use this as sidetone type paths
2135 * can frequently also be used as bypass paths.
2136 */
2137 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2138 const struct snd_soc_dapm_route *route, int num)
2139 {
2140 int i, err;
2141 int ret = 0;
2142
2143 for (i = 0; i < num; i++) {
2144 err = snd_soc_dapm_weak_route(dapm, route);
2145 if (err)
2146 ret = err;
2147 route++;
2148 }
2149
2150 return ret;
2151 }
2152 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2153
2154 /**
2155 * snd_soc_dapm_new_widgets - add new dapm widgets
2156 * @dapm: DAPM context
2157 *
2158 * Checks the codec for any new dapm widgets and creates them if found.
2159 *
2160 * Returns 0 for success.
2161 */
2162 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2163 {
2164 struct snd_soc_dapm_widget *w;
2165 unsigned int val;
2166
2167 list_for_each_entry(w, &dapm->card->widgets, list)
2168 {
2169 if (w->new)
2170 continue;
2171
2172 if (w->num_kcontrols) {
2173 w->kcontrols = kzalloc(w->num_kcontrols *
2174 sizeof(struct snd_kcontrol *),
2175 GFP_KERNEL);
2176 if (!w->kcontrols)
2177 return -ENOMEM;
2178 }
2179
2180 switch(w->id) {
2181 case snd_soc_dapm_switch:
2182 case snd_soc_dapm_mixer:
2183 case snd_soc_dapm_mixer_named_ctl:
2184 dapm_new_mixer(w);
2185 break;
2186 case snd_soc_dapm_mux:
2187 case snd_soc_dapm_virt_mux:
2188 case snd_soc_dapm_value_mux:
2189 dapm_new_mux(w);
2190 break;
2191 case snd_soc_dapm_pga:
2192 case snd_soc_dapm_out_drv:
2193 dapm_new_pga(w);
2194 break;
2195 default:
2196 break;
2197 }
2198
2199 /* Read the initial power state from the device */
2200 if (w->reg >= 0) {
2201 val = soc_widget_read(w, w->reg);
2202 val &= 1 << w->shift;
2203 if (w->invert)
2204 val = !val;
2205
2206 if (val)
2207 w->power = 1;
2208 }
2209
2210 w->new = 1;
2211
2212 dapm_mark_dirty(w, "new widget");
2213 dapm_debugfs_add_widget(w);
2214 }
2215
2216 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2217 return 0;
2218 }
2219 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2220
2221 /**
2222 * snd_soc_dapm_get_volsw - dapm mixer get callback
2223 * @kcontrol: mixer control
2224 * @ucontrol: control element information
2225 *
2226 * Callback to get the value of a dapm mixer control.
2227 *
2228 * Returns 0 for success.
2229 */
2230 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2231 struct snd_ctl_elem_value *ucontrol)
2232 {
2233 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2234 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2235 struct soc_mixer_control *mc =
2236 (struct soc_mixer_control *)kcontrol->private_value;
2237 unsigned int reg = mc->reg;
2238 unsigned int shift = mc->shift;
2239 unsigned int rshift = mc->rshift;
2240 int max = mc->max;
2241 unsigned int invert = mc->invert;
2242 unsigned int mask = (1 << fls(max)) - 1;
2243
2244 ucontrol->value.integer.value[0] =
2245 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2246 if (shift != rshift)
2247 ucontrol->value.integer.value[1] =
2248 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2249 if (invert) {
2250 ucontrol->value.integer.value[0] =
2251 max - ucontrol->value.integer.value[0];
2252 if (shift != rshift)
2253 ucontrol->value.integer.value[1] =
2254 max - ucontrol->value.integer.value[1];
2255 }
2256
2257 return 0;
2258 }
2259 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2260
2261 /**
2262 * snd_soc_dapm_put_volsw - dapm mixer set callback
2263 * @kcontrol: mixer control
2264 * @ucontrol: control element information
2265 *
2266 * Callback to set the value of a dapm mixer control.
2267 *
2268 * Returns 0 for success.
2269 */
2270 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2271 struct snd_ctl_elem_value *ucontrol)
2272 {
2273 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2274 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2275 struct snd_soc_codec *codec = widget->codec;
2276 struct soc_mixer_control *mc =
2277 (struct soc_mixer_control *)kcontrol->private_value;
2278 unsigned int reg = mc->reg;
2279 unsigned int shift = mc->shift;
2280 int max = mc->max;
2281 unsigned int mask = (1 << fls(max)) - 1;
2282 unsigned int invert = mc->invert;
2283 unsigned int val;
2284 int connect, change;
2285 struct snd_soc_dapm_update update;
2286 int wi;
2287
2288 val = (ucontrol->value.integer.value[0] & mask);
2289
2290 if (invert)
2291 val = max - val;
2292 mask = mask << shift;
2293 val = val << shift;
2294
2295 if (val)
2296 /* new connection */
2297 connect = invert ? 0 : 1;
2298 else
2299 /* old connection must be powered down */
2300 connect = invert ? 1 : 0;
2301
2302 mutex_lock(&codec->mutex);
2303
2304 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2305 if (change) {
2306 for (wi = 0; wi < wlist->num_widgets; wi++) {
2307 widget = wlist->widgets[wi];
2308
2309 widget->value = val;
2310
2311 update.kcontrol = kcontrol;
2312 update.widget = widget;
2313 update.reg = reg;
2314 update.mask = mask;
2315 update.val = val;
2316 widget->dapm->update = &update;
2317
2318 dapm_mixer_update_power(widget, kcontrol, connect);
2319
2320 widget->dapm->update = NULL;
2321 }
2322 }
2323
2324 mutex_unlock(&codec->mutex);
2325 return 0;
2326 }
2327 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2328
2329 /**
2330 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2331 * @kcontrol: mixer control
2332 * @ucontrol: control element information
2333 *
2334 * Callback to get the value of a dapm enumerated double mixer control.
2335 *
2336 * Returns 0 for success.
2337 */
2338 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2339 struct snd_ctl_elem_value *ucontrol)
2340 {
2341 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2342 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2343 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2344 unsigned int val, bitmask;
2345
2346 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2347 ;
2348 val = snd_soc_read(widget->codec, e->reg);
2349 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2350 if (e->shift_l != e->shift_r)
2351 ucontrol->value.enumerated.item[1] =
2352 (val >> e->shift_r) & (bitmask - 1);
2353
2354 return 0;
2355 }
2356 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2357
2358 /**
2359 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2360 * @kcontrol: mixer control
2361 * @ucontrol: control element information
2362 *
2363 * Callback to set the value of a dapm enumerated double mixer control.
2364 *
2365 * Returns 0 for success.
2366 */
2367 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2368 struct snd_ctl_elem_value *ucontrol)
2369 {
2370 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2371 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2372 struct snd_soc_codec *codec = widget->codec;
2373 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2374 unsigned int val, mux, change;
2375 unsigned int mask, bitmask;
2376 struct snd_soc_dapm_update update;
2377 int wi;
2378
2379 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2380 ;
2381 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2382 return -EINVAL;
2383 mux = ucontrol->value.enumerated.item[0];
2384 val = mux << e->shift_l;
2385 mask = (bitmask - 1) << e->shift_l;
2386 if (e->shift_l != e->shift_r) {
2387 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2388 return -EINVAL;
2389 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2390 mask |= (bitmask - 1) << e->shift_r;
2391 }
2392
2393 mutex_lock(&codec->mutex);
2394
2395 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2396 if (change) {
2397 for (wi = 0; wi < wlist->num_widgets; wi++) {
2398 widget = wlist->widgets[wi];
2399
2400 widget->value = val;
2401
2402 update.kcontrol = kcontrol;
2403 update.widget = widget;
2404 update.reg = e->reg;
2405 update.mask = mask;
2406 update.val = val;
2407 widget->dapm->update = &update;
2408
2409 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2410
2411 widget->dapm->update = NULL;
2412 }
2413 }
2414
2415 mutex_unlock(&codec->mutex);
2416 return change;
2417 }
2418 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2419
2420 /**
2421 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2422 * @kcontrol: mixer control
2423 * @ucontrol: control element information
2424 *
2425 * Returns 0 for success.
2426 */
2427 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2428 struct snd_ctl_elem_value *ucontrol)
2429 {
2430 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2431 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2432
2433 ucontrol->value.enumerated.item[0] = widget->value;
2434
2435 return 0;
2436 }
2437 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2438
2439 /**
2440 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2441 * @kcontrol: mixer control
2442 * @ucontrol: control element information
2443 *
2444 * Returns 0 for success.
2445 */
2446 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2447 struct snd_ctl_elem_value *ucontrol)
2448 {
2449 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2450 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2451 struct snd_soc_codec *codec = widget->codec;
2452 struct soc_enum *e =
2453 (struct soc_enum *)kcontrol->private_value;
2454 int change;
2455 int ret = 0;
2456 int wi;
2457
2458 if (ucontrol->value.enumerated.item[0] >= e->max)
2459 return -EINVAL;
2460
2461 mutex_lock(&codec->mutex);
2462
2463 change = widget->value != ucontrol->value.enumerated.item[0];
2464 if (change) {
2465 for (wi = 0; wi < wlist->num_widgets; wi++) {
2466 widget = wlist->widgets[wi];
2467
2468 widget->value = ucontrol->value.enumerated.item[0];
2469
2470 dapm_mux_update_power(widget, kcontrol, change,
2471 widget->value, e);
2472 }
2473 }
2474
2475 mutex_unlock(&codec->mutex);
2476 return ret;
2477 }
2478 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2479
2480 /**
2481 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2482 * callback
2483 * @kcontrol: mixer control
2484 * @ucontrol: control element information
2485 *
2486 * Callback to get the value of a dapm semi enumerated double mixer control.
2487 *
2488 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2489 * used for handling bitfield coded enumeration for example.
2490 *
2491 * Returns 0 for success.
2492 */
2493 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2494 struct snd_ctl_elem_value *ucontrol)
2495 {
2496 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2497 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2498 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2499 unsigned int reg_val, val, mux;
2500
2501 reg_val = snd_soc_read(widget->codec, e->reg);
2502 val = (reg_val >> e->shift_l) & e->mask;
2503 for (mux = 0; mux < e->max; mux++) {
2504 if (val == e->values[mux])
2505 break;
2506 }
2507 ucontrol->value.enumerated.item[0] = mux;
2508 if (e->shift_l != e->shift_r) {
2509 val = (reg_val >> e->shift_r) & e->mask;
2510 for (mux = 0; mux < e->max; mux++) {
2511 if (val == e->values[mux])
2512 break;
2513 }
2514 ucontrol->value.enumerated.item[1] = mux;
2515 }
2516
2517 return 0;
2518 }
2519 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2520
2521 /**
2522 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2523 * callback
2524 * @kcontrol: mixer control
2525 * @ucontrol: control element information
2526 *
2527 * Callback to set the value of a dapm semi enumerated double mixer control.
2528 *
2529 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2530 * used for handling bitfield coded enumeration for example.
2531 *
2532 * Returns 0 for success.
2533 */
2534 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2535 struct snd_ctl_elem_value *ucontrol)
2536 {
2537 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2538 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2539 struct snd_soc_codec *codec = widget->codec;
2540 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2541 unsigned int val, mux, change;
2542 unsigned int mask;
2543 struct snd_soc_dapm_update update;
2544 int wi;
2545
2546 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2547 return -EINVAL;
2548 mux = ucontrol->value.enumerated.item[0];
2549 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2550 mask = e->mask << e->shift_l;
2551 if (e->shift_l != e->shift_r) {
2552 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2553 return -EINVAL;
2554 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2555 mask |= e->mask << e->shift_r;
2556 }
2557
2558 mutex_lock(&codec->mutex);
2559
2560 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2561 if (change) {
2562 for (wi = 0; wi < wlist->num_widgets; wi++) {
2563 widget = wlist->widgets[wi];
2564
2565 widget->value = val;
2566
2567 update.kcontrol = kcontrol;
2568 update.widget = widget;
2569 update.reg = e->reg;
2570 update.mask = mask;
2571 update.val = val;
2572 widget->dapm->update = &update;
2573
2574 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2575
2576 widget->dapm->update = NULL;
2577 }
2578 }
2579
2580 mutex_unlock(&codec->mutex);
2581 return change;
2582 }
2583 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2584
2585 /**
2586 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2587 *
2588 * @kcontrol: mixer control
2589 * @uinfo: control element information
2590 *
2591 * Callback to provide information about a pin switch control.
2592 */
2593 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2594 struct snd_ctl_elem_info *uinfo)
2595 {
2596 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2597 uinfo->count = 1;
2598 uinfo->value.integer.min = 0;
2599 uinfo->value.integer.max = 1;
2600
2601 return 0;
2602 }
2603 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2604
2605 /**
2606 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2607 *
2608 * @kcontrol: mixer control
2609 * @ucontrol: Value
2610 */
2611 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2612 struct snd_ctl_elem_value *ucontrol)
2613 {
2614 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2615 const char *pin = (const char *)kcontrol->private_value;
2616
2617 mutex_lock(&codec->mutex);
2618
2619 ucontrol->value.integer.value[0] =
2620 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2621
2622 mutex_unlock(&codec->mutex);
2623
2624 return 0;
2625 }
2626 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2627
2628 /**
2629 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2630 *
2631 * @kcontrol: mixer control
2632 * @ucontrol: Value
2633 */
2634 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2635 struct snd_ctl_elem_value *ucontrol)
2636 {
2637 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2638 const char *pin = (const char *)kcontrol->private_value;
2639
2640 mutex_lock(&codec->mutex);
2641
2642 if (ucontrol->value.integer.value[0])
2643 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2644 else
2645 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2646
2647 snd_soc_dapm_sync(&codec->dapm);
2648
2649 mutex_unlock(&codec->mutex);
2650
2651 return 0;
2652 }
2653 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2654
2655 /**
2656 * snd_soc_dapm_new_control - create new dapm control
2657 * @dapm: DAPM context
2658 * @widget: widget template
2659 *
2660 * Creates a new dapm control based upon the template.
2661 *
2662 * Returns 0 for success else error.
2663 */
2664 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2665 const struct snd_soc_dapm_widget *widget)
2666 {
2667 struct snd_soc_dapm_widget *w;
2668 size_t name_len;
2669
2670 if ((w = dapm_cnew_widget(widget)) == NULL)
2671 return -ENOMEM;
2672
2673 name_len = strlen(widget->name) + 1;
2674 if (dapm->codec && dapm->codec->name_prefix)
2675 name_len += 1 + strlen(dapm->codec->name_prefix);
2676 w->name = kmalloc(name_len, GFP_KERNEL);
2677 if (w->name == NULL) {
2678 kfree(w);
2679 return -ENOMEM;
2680 }
2681 if (dapm->codec && dapm->codec->name_prefix)
2682 snprintf(w->name, name_len, "%s %s",
2683 dapm->codec->name_prefix, widget->name);
2684 else
2685 snprintf(w->name, name_len, "%s", widget->name);
2686
2687 switch (w->id) {
2688 case snd_soc_dapm_switch:
2689 case snd_soc_dapm_mixer:
2690 case snd_soc_dapm_mixer_named_ctl:
2691 w->power_check = dapm_generic_check_power;
2692 break;
2693 case snd_soc_dapm_mux:
2694 case snd_soc_dapm_virt_mux:
2695 case snd_soc_dapm_value_mux:
2696 w->power_check = dapm_generic_check_power;
2697 break;
2698 case snd_soc_dapm_adc:
2699 case snd_soc_dapm_aif_out:
2700 w->power_check = dapm_adc_check_power;
2701 break;
2702 case snd_soc_dapm_dac:
2703 case snd_soc_dapm_aif_in:
2704 w->power_check = dapm_dac_check_power;
2705 break;
2706 case snd_soc_dapm_pga:
2707 case snd_soc_dapm_out_drv:
2708 case snd_soc_dapm_input:
2709 case snd_soc_dapm_output:
2710 case snd_soc_dapm_micbias:
2711 case snd_soc_dapm_spk:
2712 case snd_soc_dapm_hp:
2713 case snd_soc_dapm_mic:
2714 case snd_soc_dapm_line:
2715 w->power_check = dapm_generic_check_power;
2716 break;
2717 case snd_soc_dapm_supply:
2718 w->power_check = dapm_supply_check_power;
2719 break;
2720 default:
2721 w->power_check = dapm_always_on_check_power;
2722 break;
2723 }
2724
2725 dapm->n_widgets++;
2726 w->dapm = dapm;
2727 w->codec = dapm->codec;
2728 w->platform = dapm->platform;
2729 INIT_LIST_HEAD(&w->sources);
2730 INIT_LIST_HEAD(&w->sinks);
2731 INIT_LIST_HEAD(&w->list);
2732 INIT_LIST_HEAD(&w->dirty);
2733 list_add(&w->list, &dapm->card->widgets);
2734
2735 /* machine layer set ups unconnected pins and insertions */
2736 w->connected = 1;
2737 return 0;
2738 }
2739 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2740
2741 /**
2742 * snd_soc_dapm_new_controls - create new dapm controls
2743 * @dapm: DAPM context
2744 * @widget: widget array
2745 * @num: number of widgets
2746 *
2747 * Creates new DAPM controls based upon the templates.
2748 *
2749 * Returns 0 for success else error.
2750 */
2751 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2752 const struct snd_soc_dapm_widget *widget,
2753 int num)
2754 {
2755 int i, ret;
2756
2757 for (i = 0; i < num; i++) {
2758 ret = snd_soc_dapm_new_control(dapm, widget);
2759 if (ret < 0) {
2760 dev_err(dapm->dev,
2761 "ASoC: Failed to create DAPM control %s: %d\n",
2762 widget->name, ret);
2763 return ret;
2764 }
2765 widget++;
2766 }
2767 return 0;
2768 }
2769 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2770
2771 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2772 const char *stream, int event)
2773 {
2774 struct snd_soc_dapm_widget *w;
2775
2776 list_for_each_entry(w, &dapm->card->widgets, list)
2777 {
2778 if (!w->sname || w->dapm != dapm)
2779 continue;
2780 dev_vdbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2781 w->name, w->sname, stream, event);
2782 if (strstr(w->sname, stream)) {
2783 dapm_mark_dirty(w, "stream event");
2784 switch(event) {
2785 case SND_SOC_DAPM_STREAM_START:
2786 w->active = 1;
2787 break;
2788 case SND_SOC_DAPM_STREAM_STOP:
2789 w->active = 0;
2790 break;
2791 case SND_SOC_DAPM_STREAM_SUSPEND:
2792 case SND_SOC_DAPM_STREAM_RESUME:
2793 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2794 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2795 break;
2796 }
2797 }
2798 }
2799
2800 dapm_power_widgets(dapm, event);
2801
2802 /* do we need to notify any clients that DAPM stream is complete */
2803 if (dapm->stream_event)
2804 dapm->stream_event(dapm, event);
2805 }
2806
2807 /**
2808 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2809 * @rtd: PCM runtime data
2810 * @stream: stream name
2811 * @event: stream event
2812 *
2813 * Sends a stream event to the dapm core. The core then makes any
2814 * necessary widget power changes.
2815 *
2816 * Returns 0 for success else error.
2817 */
2818 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2819 const char *stream, int event)
2820 {
2821 struct snd_soc_codec *codec = rtd->codec;
2822
2823 if (stream == NULL)
2824 return 0;
2825
2826 mutex_lock(&codec->mutex);
2827 soc_dapm_stream_event(&codec->dapm, stream, event);
2828 mutex_unlock(&codec->mutex);
2829 return 0;
2830 }
2831
2832 /**
2833 * snd_soc_dapm_enable_pin - enable pin.
2834 * @dapm: DAPM context
2835 * @pin: pin name
2836 *
2837 * Enables input/output pin and its parents or children widgets iff there is
2838 * a valid audio route and active audio stream.
2839 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2840 * do any widget power switching.
2841 */
2842 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2843 {
2844 return snd_soc_dapm_set_pin(dapm, pin, 1);
2845 }
2846 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2847
2848 /**
2849 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2850 * @dapm: DAPM context
2851 * @pin: pin name
2852 *
2853 * Enables input/output pin regardless of any other state. This is
2854 * intended for use with microphone bias supplies used in microphone
2855 * jack detection.
2856 *
2857 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2858 * do any widget power switching.
2859 */
2860 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2861 const char *pin)
2862 {
2863 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2864
2865 if (!w) {
2866 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2867 return -EINVAL;
2868 }
2869
2870 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2871 w->connected = 1;
2872 w->force = 1;
2873 dapm_mark_dirty(w, "force enable");
2874
2875 return 0;
2876 }
2877 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2878
2879 /**
2880 * snd_soc_dapm_disable_pin - disable pin.
2881 * @dapm: DAPM context
2882 * @pin: pin name
2883 *
2884 * Disables input/output pin and its parents or children widgets.
2885 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2886 * do any widget power switching.
2887 */
2888 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2889 const char *pin)
2890 {
2891 return snd_soc_dapm_set_pin(dapm, pin, 0);
2892 }
2893 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2894
2895 /**
2896 * snd_soc_dapm_nc_pin - permanently disable pin.
2897 * @dapm: DAPM context
2898 * @pin: pin name
2899 *
2900 * Marks the specified pin as being not connected, disabling it along
2901 * any parent or child widgets. At present this is identical to
2902 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2903 * additional things such as disabling controls which only affect
2904 * paths through the pin.
2905 *
2906 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2907 * do any widget power switching.
2908 */
2909 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2910 {
2911 return snd_soc_dapm_set_pin(dapm, pin, 0);
2912 }
2913 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2914
2915 /**
2916 * snd_soc_dapm_get_pin_status - get audio pin status
2917 * @dapm: DAPM context
2918 * @pin: audio signal pin endpoint (or start point)
2919 *
2920 * Get audio pin status - connected or disconnected.
2921 *
2922 * Returns 1 for connected otherwise 0.
2923 */
2924 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2925 const char *pin)
2926 {
2927 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2928
2929 if (w)
2930 return w->connected;
2931
2932 return 0;
2933 }
2934 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2935
2936 /**
2937 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2938 * @dapm: DAPM context
2939 * @pin: audio signal pin endpoint (or start point)
2940 *
2941 * Mark the given endpoint or pin as ignoring suspend. When the
2942 * system is disabled a path between two endpoints flagged as ignoring
2943 * suspend will not be disabled. The path must already be enabled via
2944 * normal means at suspend time, it will not be turned on if it was not
2945 * already enabled.
2946 */
2947 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2948 const char *pin)
2949 {
2950 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2951
2952 if (!w) {
2953 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2954 return -EINVAL;
2955 }
2956
2957 w->ignore_suspend = 1;
2958
2959 return 0;
2960 }
2961 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2962
2963 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
2964 struct snd_soc_dapm_widget *w)
2965 {
2966 struct snd_soc_dapm_path *p;
2967
2968 list_for_each_entry(p, &card->paths, list) {
2969 if ((p->source == w) || (p->sink == w)) {
2970 dev_dbg(card->dev,
2971 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
2972 p->source->name, p->source->id, p->source->dapm,
2973 p->sink->name, p->sink->id, p->sink->dapm);
2974
2975 /* Connected to something other than the codec */
2976 if (p->source->dapm != p->sink->dapm)
2977 return true;
2978 /*
2979 * Loopback connection from codec external pin to
2980 * codec external pin
2981 */
2982 if (p->sink->id == snd_soc_dapm_input) {
2983 switch (p->source->id) {
2984 case snd_soc_dapm_output:
2985 case snd_soc_dapm_micbias:
2986 return true;
2987 default:
2988 break;
2989 }
2990 }
2991 }
2992 }
2993
2994 return false;
2995 }
2996
2997 /**
2998 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
2999 * @codec: The codec whose pins should be processed
3000 *
3001 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3002 * which are unused. Pins are used if they are connected externally to the
3003 * codec, whether that be to some other device, or a loop-back connection to
3004 * the codec itself.
3005 */
3006 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3007 {
3008 struct snd_soc_card *card = codec->card;
3009 struct snd_soc_dapm_context *dapm = &codec->dapm;
3010 struct snd_soc_dapm_widget *w;
3011
3012 dev_dbg(codec->dev, "Auto NC: DAPMs: card:%p codec:%p\n",
3013 &card->dapm, &codec->dapm);
3014
3015 list_for_each_entry(w, &card->widgets, list) {
3016 if (w->dapm != dapm)
3017 continue;
3018 switch (w->id) {
3019 case snd_soc_dapm_input:
3020 case snd_soc_dapm_output:
3021 case snd_soc_dapm_micbias:
3022 dev_dbg(codec->dev, "Auto NC: Checking widget %s\n",
3023 w->name);
3024 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3025 dev_dbg(codec->dev,
3026 "... Not in map; disabling\n");
3027 snd_soc_dapm_nc_pin(dapm, w->name);
3028 }
3029 break;
3030 default:
3031 break;
3032 }
3033 }
3034 }
3035
3036 /**
3037 * snd_soc_dapm_free - free dapm resources
3038 * @dapm: DAPM context
3039 *
3040 * Free all dapm widgets and resources.
3041 */
3042 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3043 {
3044 snd_soc_dapm_sys_remove(dapm->dev);
3045 dapm_debugfs_cleanup(dapm);
3046 dapm_free_widgets(dapm);
3047 list_del(&dapm->list);
3048 }
3049 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3050
3051 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3052 {
3053 struct snd_soc_dapm_widget *w;
3054 LIST_HEAD(down_list);
3055 int powerdown = 0;
3056
3057 list_for_each_entry(w, &dapm->card->widgets, list) {
3058 if (w->dapm != dapm)
3059 continue;
3060 if (w->power) {
3061 dapm_seq_insert(w, &down_list, false);
3062 w->power = 0;
3063 powerdown = 1;
3064 }
3065 }
3066
3067 /* If there were no widgets to power down we're already in
3068 * standby.
3069 */
3070 if (powerdown) {
3071 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
3072 dapm_seq_run(dapm, &down_list, 0, false);
3073 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
3074 }
3075 }
3076
3077 /*
3078 * snd_soc_dapm_shutdown - callback for system shutdown
3079 */
3080 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3081 {
3082 struct snd_soc_codec *codec;
3083
3084 list_for_each_entry(codec, &card->codec_dev_list, list) {
3085 soc_dapm_shutdown_codec(&codec->dapm);
3086 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
3087 }
3088 }
3089
3090 /* Module information */
3091 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3092 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3093 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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