projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
ASoC: Don't mark the outputs of supplies as dirty on state changes
[deliverable/linux.git] / sound / soc / soc-dapm.c
1 /*
2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * Features:
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
15 * DACs/ADCs.
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
20 * sinks, dacs, etc
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
22 * device reopen.
23 *
24 * Todo:
25 * o DAPM power change sequencing - allow for configurable per
26 * codec sequences.
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
30 */
31
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/async.h>
36 #include <linux/delay.h>
37 #include <linux/pm.h>
38 #include <linux/bitops.h>
39 #include <linux/platform_device.h>
40 #include <linux/jiffies.h>
41 #include <linux/debugfs.h>
42 #include <linux/slab.h>
43 #include <sound/core.h>
44 #include <sound/pcm.h>
45 #include <sound/pcm_params.h>
46 #include <sound/soc.h>
47 #include <sound/initval.h>
48
49 #include <trace/events/asoc.h>
50
51 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
52
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq[] = {
55 [snd_soc_dapm_pre] = 0,
56 [snd_soc_dapm_supply] = 1,
57 [snd_soc_dapm_micbias] = 2,
58 [snd_soc_dapm_aif_in] = 3,
59 [snd_soc_dapm_aif_out] = 3,
60 [snd_soc_dapm_mic] = 4,
61 [snd_soc_dapm_mux] = 5,
62 [snd_soc_dapm_virt_mux] = 5,
63 [snd_soc_dapm_value_mux] = 5,
64 [snd_soc_dapm_dac] = 6,
65 [snd_soc_dapm_mixer] = 7,
66 [snd_soc_dapm_mixer_named_ctl] = 7,
67 [snd_soc_dapm_pga] = 8,
68 [snd_soc_dapm_adc] = 9,
69 [snd_soc_dapm_out_drv] = 10,
70 [snd_soc_dapm_hp] = 10,
71 [snd_soc_dapm_spk] = 10,
72 [snd_soc_dapm_post] = 11,
73 };
74
75 static int dapm_down_seq[] = {
76 [snd_soc_dapm_pre] = 0,
77 [snd_soc_dapm_adc] = 1,
78 [snd_soc_dapm_hp] = 2,
79 [snd_soc_dapm_spk] = 2,
80 [snd_soc_dapm_out_drv] = 2,
81 [snd_soc_dapm_pga] = 4,
82 [snd_soc_dapm_mixer_named_ctl] = 5,
83 [snd_soc_dapm_mixer] = 5,
84 [snd_soc_dapm_dac] = 6,
85 [snd_soc_dapm_mic] = 7,
86 [snd_soc_dapm_micbias] = 8,
87 [snd_soc_dapm_mux] = 9,
88 [snd_soc_dapm_virt_mux] = 9,
89 [snd_soc_dapm_value_mux] = 9,
90 [snd_soc_dapm_aif_in] = 10,
91 [snd_soc_dapm_aif_out] = 10,
92 [snd_soc_dapm_supply] = 11,
93 [snd_soc_dapm_post] = 12,
94 };
95
96 static void pop_wait(u32 pop_time)
97 {
98 if (pop_time)
99 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
100 }
101
102 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
103 {
104 va_list args;
105 char *buf;
106
107 if (!pop_time)
108 return;
109
110 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
111 if (buf == NULL)
112 return;
113
114 va_start(args, fmt);
115 vsnprintf(buf, PAGE_SIZE, fmt, args);
116 dev_info(dev, "%s", buf);
117 va_end(args);
118
119 kfree(buf);
120 }
121
122 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
123 {
124 return !list_empty(&w->dirty);
125 }
126
127 static 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
136 /* create a new dapm widget */
137 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
138 const struct snd_soc_dapm_widget *_widget)
139 {
140 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
141 }
142
143 /* get snd_card from DAPM context */
144 static inline struct snd_card *dapm_get_snd_card(
145 struct snd_soc_dapm_context *dapm)
146 {
147 if (dapm->codec)
148 return dapm->codec->card->snd_card;
149 else if (dapm->platform)
150 return dapm->platform->card->snd_card;
151 else
152 BUG();
153
154 /* unreachable */
155 return NULL;
156 }
157
158 /* get soc_card from DAPM context */
159 static inline struct snd_soc_card *dapm_get_soc_card(
160 struct snd_soc_dapm_context *dapm)
161 {
162 if (dapm->codec)
163 return dapm->codec->card;
164 else if (dapm->platform)
165 return dapm->platform->card;
166 else
167 BUG();
168
169 /* unreachable */
170 return NULL;
171 }
172
173 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
174 {
175 if (w->codec)
176 return snd_soc_read(w->codec, reg);
177 else if (w->platform)
178 return snd_soc_platform_read(w->platform, reg);
179
180 dev_err(w->dapm->dev, "no valid widget read method\n");
181 return -1;
182 }
183
184 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
185 {
186 if (w->codec)
187 return snd_soc_write(w->codec, reg, val);
188 else if (w->platform)
189 return snd_soc_platform_write(w->platform, reg, val);
190
191 dev_err(w->dapm->dev, "no valid widget write method\n");
192 return -1;
193 }
194
195 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
196 unsigned short reg, unsigned int mask, unsigned int value)
197 {
198 int change;
199 unsigned int old, new;
200 int ret;
201
202 ret = soc_widget_read(w, reg);
203 if (ret < 0)
204 return ret;
205
206 old = ret;
207 new = (old & ~mask) | (value & mask);
208 change = old != new;
209 if (change) {
210 ret = soc_widget_write(w, reg, new);
211 if (ret < 0)
212 return ret;
213 }
214
215 return change;
216 }
217
218 /**
219 * snd_soc_dapm_set_bias_level - set the bias level for the system
220 * @dapm: DAPM context
221 * @level: level to configure
222 *
223 * Configure the bias (power) levels for the SoC audio device.
224 *
225 * Returns 0 for success else error.
226 */
227 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
228 enum snd_soc_bias_level level)
229 {
230 struct snd_soc_card *card = dapm->card;
231 int ret = 0;
232
233 trace_snd_soc_bias_level_start(card, level);
234
235 if (card && card->set_bias_level)
236 ret = card->set_bias_level(card, dapm, level);
237 if (ret != 0)
238 goto out;
239
240 if (dapm->codec) {
241 if (dapm->codec->driver->set_bias_level)
242 ret = dapm->codec->driver->set_bias_level(dapm->codec,
243 level);
244 else
245 dapm->bias_level = level;
246 }
247 if (ret != 0)
248 goto out;
249
250 if (card && card->set_bias_level_post)
251 ret = card->set_bias_level_post(card, dapm, level);
252 out:
253 trace_snd_soc_bias_level_done(card, level);
254
255 return ret;
256 }
257
258 /* set up initial codec paths */
259 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
260 struct snd_soc_dapm_path *p, int i)
261 {
262 switch (w->id) {
263 case snd_soc_dapm_switch:
264 case snd_soc_dapm_mixer:
265 case snd_soc_dapm_mixer_named_ctl: {
266 int val;
267 struct soc_mixer_control *mc = (struct soc_mixer_control *)
268 w->kcontrol_news[i].private_value;
269 unsigned int reg = mc->reg;
270 unsigned int shift = mc->shift;
271 int max = mc->max;
272 unsigned int mask = (1 << fls(max)) - 1;
273 unsigned int invert = mc->invert;
274
275 val = soc_widget_read(w, reg);
276 val = (val >> shift) & mask;
277
278 if ((invert && !val) || (!invert && val))
279 p->connect = 1;
280 else
281 p->connect = 0;
282 }
283 break;
284 case snd_soc_dapm_mux: {
285 struct soc_enum *e = (struct soc_enum *)
286 w->kcontrol_news[i].private_value;
287 int val, item, bitmask;
288
289 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
290 ;
291 val = soc_widget_read(w, e->reg);
292 item = (val >> e->shift_l) & (bitmask - 1);
293
294 p->connect = 0;
295 for (i = 0; i < e->max; i++) {
296 if (!(strcmp(p->name, e->texts[i])) && item == i)
297 p->connect = 1;
298 }
299 }
300 break;
301 case snd_soc_dapm_virt_mux: {
302 struct soc_enum *e = (struct soc_enum *)
303 w->kcontrol_news[i].private_value;
304
305 p->connect = 0;
306 /* since a virtual mux has no backing registers to
307 * decide which path to connect, it will try to match
308 * with the first enumeration. This is to ensure
309 * that the default mux choice (the first) will be
310 * correctly powered up during initialization.
311 */
312 if (!strcmp(p->name, e->texts[0]))
313 p->connect = 1;
314 }
315 break;
316 case snd_soc_dapm_value_mux: {
317 struct soc_enum *e = (struct soc_enum *)
318 w->kcontrol_news[i].private_value;
319 int val, item;
320
321 val = soc_widget_read(w, e->reg);
322 val = (val >> e->shift_l) & e->mask;
323 for (item = 0; item < e->max; item++) {
324 if (val == e->values[item])
325 break;
326 }
327
328 p->connect = 0;
329 for (i = 0; i < e->max; i++) {
330 if (!(strcmp(p->name, e->texts[i])) && item == i)
331 p->connect = 1;
332 }
333 }
334 break;
335 /* does not affect routing - always connected */
336 case snd_soc_dapm_pga:
337 case snd_soc_dapm_out_drv:
338 case snd_soc_dapm_output:
339 case snd_soc_dapm_adc:
340 case snd_soc_dapm_input:
341 case snd_soc_dapm_dac:
342 case snd_soc_dapm_micbias:
343 case snd_soc_dapm_vmid:
344 case snd_soc_dapm_supply:
345 case snd_soc_dapm_aif_in:
346 case snd_soc_dapm_aif_out:
347 case snd_soc_dapm_hp:
348 case snd_soc_dapm_mic:
349 case snd_soc_dapm_spk:
350 case snd_soc_dapm_line:
351 p->connect = 1;
352 break;
353 /* does affect routing - dynamically connected */
354 case snd_soc_dapm_pre:
355 case snd_soc_dapm_post:
356 p->connect = 0;
357 break;
358 }
359 }
360
361 /* connect mux widget to its interconnecting audio paths */
362 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
363 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
364 struct snd_soc_dapm_path *path, const char *control_name,
365 const struct snd_kcontrol_new *kcontrol)
366 {
367 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
368 int i;
369
370 for (i = 0; i < e->max; i++) {
371 if (!(strcmp(control_name, e->texts[i]))) {
372 list_add(&path->list, &dapm->card->paths);
373 list_add(&path->list_sink, &dest->sources);
374 list_add(&path->list_source, &src->sinks);
375 path->name = (char*)e->texts[i];
376 dapm_set_path_status(dest, path, 0);
377 return 0;
378 }
379 }
380
381 return -ENODEV;
382 }
383
384 /* connect mixer widget to its interconnecting audio paths */
385 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
386 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
387 struct snd_soc_dapm_path *path, const char *control_name)
388 {
389 int i;
390
391 /* search for mixer kcontrol */
392 for (i = 0; i < dest->num_kcontrols; i++) {
393 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
394 list_add(&path->list, &dapm->card->paths);
395 list_add(&path->list_sink, &dest->sources);
396 list_add(&path->list_source, &src->sinks);
397 path->name = dest->kcontrol_news[i].name;
398 dapm_set_path_status(dest, path, i);
399 return 0;
400 }
401 }
402 return -ENODEV;
403 }
404
405 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
406 struct snd_soc_dapm_widget *kcontrolw,
407 const struct snd_kcontrol_new *kcontrol_new,
408 struct snd_kcontrol **kcontrol)
409 {
410 struct snd_soc_dapm_widget *w;
411 int i;
412
413 *kcontrol = NULL;
414
415 list_for_each_entry(w, &dapm->card->widgets, list) {
416 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
417 continue;
418 for (i = 0; i < w->num_kcontrols; i++) {
419 if (&w->kcontrol_news[i] == kcontrol_new) {
420 if (w->kcontrols)
421 *kcontrol = w->kcontrols[i];
422 return 1;
423 }
424 }
425 }
426
427 return 0;
428 }
429
430 /* create new dapm mixer control */
431 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
432 {
433 struct snd_soc_dapm_context *dapm = w->dapm;
434 int i, ret = 0;
435 size_t name_len, prefix_len;
436 struct snd_soc_dapm_path *path;
437 struct snd_card *card = dapm->card->snd_card;
438 const char *prefix;
439 struct snd_soc_dapm_widget_list *wlist;
440 size_t wlistsize;
441
442 if (dapm->codec)
443 prefix = dapm->codec->name_prefix;
444 else
445 prefix = NULL;
446
447 if (prefix)
448 prefix_len = strlen(prefix) + 1;
449 else
450 prefix_len = 0;
451
452 /* add kcontrol */
453 for (i = 0; i < w->num_kcontrols; i++) {
454
455 /* match name */
456 list_for_each_entry(path, &w->sources, list_sink) {
457
458 /* mixer/mux paths name must match control name */
459 if (path->name != (char *)w->kcontrol_news[i].name)
460 continue;
461
462 if (w->kcontrols[i]) {
463 path->kcontrol = w->kcontrols[i];
464 continue;
465 }
466
467 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
468 sizeof(struct snd_soc_dapm_widget *),
469 wlist = kzalloc(wlistsize, GFP_KERNEL);
470 if (wlist == NULL) {
471 dev_err(dapm->dev,
472 "asoc: can't allocate widget list for %s\n",
473 w->name);
474 return -ENOMEM;
475 }
476 wlist->num_widgets = 1;
477 wlist->widgets[0] = w;
478
479 /* add dapm control with long name.
480 * for dapm_mixer this is the concatenation of the
481 * mixer and kcontrol name.
482 * for dapm_mixer_named_ctl this is simply the
483 * kcontrol name.
484 */
485 name_len = strlen(w->kcontrol_news[i].name) + 1;
486 if (w->id != snd_soc_dapm_mixer_named_ctl)
487 name_len += 1 + strlen(w->name);
488
489 path->long_name = kmalloc(name_len, GFP_KERNEL);
490
491 if (path->long_name == NULL) {
492 kfree(wlist);
493 return -ENOMEM;
494 }
495
496 switch (w->id) {
497 default:
498 /* The control will get a prefix from
499 * the control creation process but
500 * we're also using the same prefix
501 * for widgets so cut the prefix off
502 * the front of the widget name.
503 */
504 snprintf(path->long_name, name_len, "%s %s",
505 w->name + prefix_len,
506 w->kcontrol_news[i].name);
507 break;
508 case snd_soc_dapm_mixer_named_ctl:
509 snprintf(path->long_name, name_len, "%s",
510 w->kcontrol_news[i].name);
511 break;
512 }
513
514 path->long_name[name_len - 1] = '\0';
515
516 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
517 wlist, path->long_name,
518 prefix);
519 ret = snd_ctl_add(card, path->kcontrol);
520 if (ret < 0) {
521 dev_err(dapm->dev,
522 "asoc: failed to add dapm kcontrol %s: %d\n",
523 path->long_name, ret);
524 kfree(wlist);
525 kfree(path->long_name);
526 path->long_name = NULL;
527 return ret;
528 }
529 w->kcontrols[i] = path->kcontrol;
530 }
531 }
532 return ret;
533 }
534
535 /* create new dapm mux control */
536 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
537 {
538 struct snd_soc_dapm_context *dapm = w->dapm;
539 struct snd_soc_dapm_path *path = NULL;
540 struct snd_kcontrol *kcontrol;
541 struct snd_card *card = dapm->card->snd_card;
542 const char *prefix;
543 size_t prefix_len;
544 int ret;
545 struct snd_soc_dapm_widget_list *wlist;
546 int shared, wlistentries;
547 size_t wlistsize;
548 char *name;
549
550 if (w->num_kcontrols != 1) {
551 dev_err(dapm->dev,
552 "asoc: mux %s has incorrect number of controls\n",
553 w->name);
554 return -EINVAL;
555 }
556
557 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
558 &kcontrol);
559 if (kcontrol) {
560 wlist = kcontrol->private_data;
561 wlistentries = wlist->num_widgets + 1;
562 } else {
563 wlist = NULL;
564 wlistentries = 1;
565 }
566 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
567 wlistentries * sizeof(struct snd_soc_dapm_widget *),
568 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
569 if (wlist == NULL) {
570 dev_err(dapm->dev,
571 "asoc: can't allocate widget list for %s\n", w->name);
572 return -ENOMEM;
573 }
574 wlist->num_widgets = wlistentries;
575 wlist->widgets[wlistentries - 1] = w;
576
577 if (!kcontrol) {
578 if (dapm->codec)
579 prefix = dapm->codec->name_prefix;
580 else
581 prefix = NULL;
582
583 if (shared) {
584 name = w->kcontrol_news[0].name;
585 prefix_len = 0;
586 } else {
587 name = w->name;
588 if (prefix)
589 prefix_len = strlen(prefix) + 1;
590 else
591 prefix_len = 0;
592 }
593
594 /*
595 * The control will get a prefix from the control creation
596 * process but we're also using the same prefix for widgets so
597 * cut the prefix off the front of the widget name.
598 */
599 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
600 name + prefix_len, prefix);
601 ret = snd_ctl_add(card, kcontrol);
602 if (ret < 0) {
603 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
604 w->name, ret);
605 kfree(wlist);
606 return ret;
607 }
608 }
609
610 kcontrol->private_data = wlist;
611
612 w->kcontrols[0] = kcontrol;
613
614 list_for_each_entry(path, &w->sources, list_sink)
615 path->kcontrol = kcontrol;
616
617 return 0;
618 }
619
620 /* create new dapm volume control */
621 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
622 {
623 if (w->num_kcontrols)
624 dev_err(w->dapm->dev,
625 "asoc: PGA controls not supported: '%s'\n", w->name);
626
627 return 0;
628 }
629
630 /* reset 'walked' bit for each dapm path */
631 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
632 {
633 struct snd_soc_dapm_path *p;
634
635 list_for_each_entry(p, &dapm->card->paths, list)
636 p->walked = 0;
637 }
638
639 /* We implement power down on suspend by checking the power state of
640 * the ALSA card - when we are suspending the ALSA state for the card
641 * is set to D3.
642 */
643 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
644 {
645 int level = snd_power_get_state(widget->dapm->card->snd_card);
646
647 switch (level) {
648 case SNDRV_CTL_POWER_D3hot:
649 case SNDRV_CTL_POWER_D3cold:
650 if (widget->ignore_suspend)
651 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
652 widget->name);
653 return widget->ignore_suspend;
654 default:
655 return 1;
656 }
657 }
658
659 /*
660 * Recursively check for a completed path to an active or physically connected
661 * output widget. Returns number of complete paths.
662 */
663 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
664 {
665 struct snd_soc_dapm_path *path;
666 int con = 0;
667
668 DAPM_UPDATE_STAT(widget, path_checks);
669
670 if (widget->id == snd_soc_dapm_supply)
671 return 0;
672
673 switch (widget->id) {
674 case snd_soc_dapm_adc:
675 case snd_soc_dapm_aif_out:
676 if (widget->active)
677 return snd_soc_dapm_suspend_check(widget);
678 default:
679 break;
680 }
681
682 if (widget->connected) {
683 /* connected pin ? */
684 if (widget->id == snd_soc_dapm_output && !widget->ext)
685 return snd_soc_dapm_suspend_check(widget);
686
687 /* connected jack or spk ? */
688 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
689 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
690 return snd_soc_dapm_suspend_check(widget);
691 }
692
693 list_for_each_entry(path, &widget->sinks, list_source) {
694 DAPM_UPDATE_STAT(widget, neighbour_checks);
695
696 if (path->weak)
697 continue;
698
699 if (path->walked)
700 continue;
701
702 if (path->sink && path->connect) {
703 path->walked = 1;
704 con += is_connected_output_ep(path->sink);
705 }
706 }
707
708 return con;
709 }
710
711 /*
712 * Recursively check for a completed path to an active or physically connected
713 * input widget. Returns number of complete paths.
714 */
715 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
716 {
717 struct snd_soc_dapm_path *path;
718 int con = 0;
719
720 DAPM_UPDATE_STAT(widget, path_checks);
721
722 if (widget->id == snd_soc_dapm_supply)
723 return 0;
724
725 /* active stream ? */
726 switch (widget->id) {
727 case snd_soc_dapm_dac:
728 case snd_soc_dapm_aif_in:
729 if (widget->active)
730 return snd_soc_dapm_suspend_check(widget);
731 default:
732 break;
733 }
734
735 if (widget->connected) {
736 /* connected pin ? */
737 if (widget->id == snd_soc_dapm_input && !widget->ext)
738 return snd_soc_dapm_suspend_check(widget);
739
740 /* connected VMID/Bias for lower pops */
741 if (widget->id == snd_soc_dapm_vmid)
742 return snd_soc_dapm_suspend_check(widget);
743
744 /* connected jack ? */
745 if (widget->id == snd_soc_dapm_mic ||
746 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
747 return snd_soc_dapm_suspend_check(widget);
748 }
749
750 list_for_each_entry(path, &widget->sources, list_sink) {
751 DAPM_UPDATE_STAT(widget, neighbour_checks);
752
753 if (path->weak)
754 continue;
755
756 if (path->walked)
757 continue;
758
759 if (path->source && path->connect) {
760 path->walked = 1;
761 con += is_connected_input_ep(path->source);
762 }
763 }
764
765 return con;
766 }
767
768 /*
769 * Handler for generic register modifier widget.
770 */
771 int dapm_reg_event(struct snd_soc_dapm_widget *w,
772 struct snd_kcontrol *kcontrol, int event)
773 {
774 unsigned int val;
775
776 if (SND_SOC_DAPM_EVENT_ON(event))
777 val = w->on_val;
778 else
779 val = w->off_val;
780
781 soc_widget_update_bits(w, -(w->reg + 1),
782 w->mask << w->shift, val << w->shift);
783
784 return 0;
785 }
786 EXPORT_SYMBOL_GPL(dapm_reg_event);
787
788 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
789 {
790 if (w->power_checked)
791 return w->new_power;
792
793 if (w->force)
794 w->new_power = 1;
795 else
796 w->new_power = w->power_check(w);
797
798 w->power_checked = true;
799
800 return w->new_power;
801 }
802
803 /* Generic check to see if a widget should be powered.
804 */
805 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
806 {
807 int in, out;
808
809 DAPM_UPDATE_STAT(w, power_checks);
810
811 in = is_connected_input_ep(w);
812 dapm_clear_walk(w->dapm);
813 out = is_connected_output_ep(w);
814 dapm_clear_walk(w->dapm);
815 return out != 0 && in != 0;
816 }
817
818 /* Check to see if an ADC has power */
819 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
820 {
821 int in;
822
823 DAPM_UPDATE_STAT(w, power_checks);
824
825 if (w->active) {
826 in = is_connected_input_ep(w);
827 dapm_clear_walk(w->dapm);
828 return in != 0;
829 } else {
830 return dapm_generic_check_power(w);
831 }
832 }
833
834 /* Check to see if a DAC has power */
835 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
836 {
837 int out;
838
839 DAPM_UPDATE_STAT(w, power_checks);
840
841 if (w->active) {
842 out = is_connected_output_ep(w);
843 dapm_clear_walk(w->dapm);
844 return out != 0;
845 } else {
846 return dapm_generic_check_power(w);
847 }
848 }
849
850 /* Check to see if a power supply is needed */
851 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
852 {
853 struct snd_soc_dapm_path *path;
854 int power = 0;
855
856 DAPM_UPDATE_STAT(w, power_checks);
857
858 /* Check if one of our outputs is connected */
859 list_for_each_entry(path, &w->sinks, list_source) {
860 DAPM_UPDATE_STAT(w, neighbour_checks);
861
862 if (path->weak)
863 continue;
864
865 if (path->connected &&
866 !path->connected(path->source, path->sink))
867 continue;
868
869 if (!path->sink)
870 continue;
871
872 if (dapm_widget_power_check(path->sink)) {
873 power = 1;
874 break;
875 }
876 }
877
878 dapm_clear_walk(w->dapm);
879
880 return power;
881 }
882
883 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
884 {
885 return 1;
886 }
887
888 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
889 struct snd_soc_dapm_widget *b,
890 bool power_up)
891 {
892 int *sort;
893
894 if (power_up)
895 sort = dapm_up_seq;
896 else
897 sort = dapm_down_seq;
898
899 if (sort[a->id] != sort[b->id])
900 return sort[a->id] - sort[b->id];
901 if (a->subseq != b->subseq) {
902 if (power_up)
903 return a->subseq - b->subseq;
904 else
905 return b->subseq - a->subseq;
906 }
907 if (a->reg != b->reg)
908 return a->reg - b->reg;
909 if (a->dapm != b->dapm)
910 return (unsigned long)a->dapm - (unsigned long)b->dapm;
911
912 return 0;
913 }
914
915 /* Insert a widget in order into a DAPM power sequence. */
916 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
917 struct list_head *list,
918 bool power_up)
919 {
920 struct snd_soc_dapm_widget *w;
921
922 list_for_each_entry(w, list, power_list)
923 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
924 list_add_tail(&new_widget->power_list, &w->power_list);
925 return;
926 }
927
928 list_add_tail(&new_widget->power_list, list);
929 }
930
931 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
932 struct snd_soc_dapm_widget *w, int event)
933 {
934 struct snd_soc_card *card = dapm->card;
935 const char *ev_name;
936 int power, ret;
937
938 switch (event) {
939 case SND_SOC_DAPM_PRE_PMU:
940 ev_name = "PRE_PMU";
941 power = 1;
942 break;
943 case SND_SOC_DAPM_POST_PMU:
944 ev_name = "POST_PMU";
945 power = 1;
946 break;
947 case SND_SOC_DAPM_PRE_PMD:
948 ev_name = "PRE_PMD";
949 power = 0;
950 break;
951 case SND_SOC_DAPM_POST_PMD:
952 ev_name = "POST_PMD";
953 power = 0;
954 break;
955 default:
956 BUG();
957 return;
958 }
959
960 if (w->power != power)
961 return;
962
963 if (w->event && (w->event_flags & event)) {
964 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
965 w->name, ev_name);
966 trace_snd_soc_dapm_widget_event_start(w, event);
967 ret = w->event(w, NULL, event);
968 trace_snd_soc_dapm_widget_event_done(w, event);
969 if (ret < 0)
970 pr_err("%s: %s event failed: %d\n",
971 ev_name, w->name, ret);
972 }
973 }
974
975 /* Apply the coalesced changes from a DAPM sequence */
976 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
977 struct list_head *pending)
978 {
979 struct snd_soc_card *card = dapm->card;
980 struct snd_soc_dapm_widget *w;
981 int reg, power;
982 unsigned int value = 0;
983 unsigned int mask = 0;
984 unsigned int cur_mask;
985
986 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
987 power_list)->reg;
988
989 list_for_each_entry(w, pending, power_list) {
990 cur_mask = 1 << w->shift;
991 BUG_ON(reg != w->reg);
992
993 if (w->invert)
994 power = !w->power;
995 else
996 power = w->power;
997
998 mask |= cur_mask;
999 if (power)
1000 value |= cur_mask;
1001
1002 pop_dbg(dapm->dev, card->pop_time,
1003 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1004 w->name, reg, value, mask);
1005
1006 /* Check for events */
1007 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1008 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1009 }
1010
1011 if (reg >= 0) {
1012 /* Any widget will do, they should all be updating the
1013 * same register.
1014 */
1015 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1016 power_list);
1017
1018 pop_dbg(dapm->dev, card->pop_time,
1019 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1020 value, mask, reg, card->pop_time);
1021 pop_wait(card->pop_time);
1022 soc_widget_update_bits(w, reg, mask, value);
1023 }
1024
1025 list_for_each_entry(w, pending, power_list) {
1026 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1027 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1028 }
1029 }
1030
1031 /* Apply a DAPM power sequence.
1032 *
1033 * We walk over a pre-sorted list of widgets to apply power to. In
1034 * order to minimise the number of writes to the device required
1035 * multiple widgets will be updated in a single write where possible.
1036 * Currently anything that requires more than a single write is not
1037 * handled.
1038 */
1039 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1040 struct list_head *list, int event, bool power_up)
1041 {
1042 struct snd_soc_dapm_widget *w, *n;
1043 LIST_HEAD(pending);
1044 int cur_sort = -1;
1045 int cur_subseq = -1;
1046 int cur_reg = SND_SOC_NOPM;
1047 struct snd_soc_dapm_context *cur_dapm = NULL;
1048 int ret, i;
1049 int *sort;
1050
1051 if (power_up)
1052 sort = dapm_up_seq;
1053 else
1054 sort = dapm_down_seq;
1055
1056 list_for_each_entry_safe(w, n, list, power_list) {
1057 ret = 0;
1058
1059 /* Do we need to apply any queued changes? */
1060 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1061 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1062 if (!list_empty(&pending))
1063 dapm_seq_run_coalesced(cur_dapm, &pending);
1064
1065 if (cur_dapm && cur_dapm->seq_notifier) {
1066 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1067 if (sort[i] == cur_sort)
1068 cur_dapm->seq_notifier(cur_dapm,
1069 i,
1070 cur_subseq);
1071 }
1072
1073 INIT_LIST_HEAD(&pending);
1074 cur_sort = -1;
1075 cur_subseq = INT_MIN;
1076 cur_reg = SND_SOC_NOPM;
1077 cur_dapm = NULL;
1078 }
1079
1080 switch (w->id) {
1081 case snd_soc_dapm_pre:
1082 if (!w->event)
1083 list_for_each_entry_safe_continue(w, n, list,
1084 power_list);
1085
1086 if (event == SND_SOC_DAPM_STREAM_START)
1087 ret = w->event(w,
1088 NULL, SND_SOC_DAPM_PRE_PMU);
1089 else if (event == SND_SOC_DAPM_STREAM_STOP)
1090 ret = w->event(w,
1091 NULL, SND_SOC_DAPM_PRE_PMD);
1092 break;
1093
1094 case snd_soc_dapm_post:
1095 if (!w->event)
1096 list_for_each_entry_safe_continue(w, n, list,
1097 power_list);
1098
1099 if (event == SND_SOC_DAPM_STREAM_START)
1100 ret = w->event(w,
1101 NULL, SND_SOC_DAPM_POST_PMU);
1102 else if (event == SND_SOC_DAPM_STREAM_STOP)
1103 ret = w->event(w,
1104 NULL, SND_SOC_DAPM_POST_PMD);
1105 break;
1106
1107 default:
1108 /* Queue it up for application */
1109 cur_sort = sort[w->id];
1110 cur_subseq = w->subseq;
1111 cur_reg = w->reg;
1112 cur_dapm = w->dapm;
1113 list_move(&w->power_list, &pending);
1114 break;
1115 }
1116
1117 if (ret < 0)
1118 dev_err(w->dapm->dev,
1119 "Failed to apply widget power: %d\n", ret);
1120 }
1121
1122 if (!list_empty(&pending))
1123 dapm_seq_run_coalesced(cur_dapm, &pending);
1124
1125 if (cur_dapm && cur_dapm->seq_notifier) {
1126 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1127 if (sort[i] == cur_sort)
1128 cur_dapm->seq_notifier(cur_dapm,
1129 i, cur_subseq);
1130 }
1131 }
1132
1133 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1134 {
1135 struct snd_soc_dapm_update *update = dapm->update;
1136 struct snd_soc_dapm_widget *w;
1137 int ret;
1138
1139 if (!update)
1140 return;
1141
1142 w = update->widget;
1143
1144 if (w->event &&
1145 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1146 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1147 if (ret != 0)
1148 pr_err("%s DAPM pre-event failed: %d\n",
1149 w->name, ret);
1150 }
1151
1152 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1153 update->val);
1154 if (ret < 0)
1155 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1156
1157 if (w->event &&
1158 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1159 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1160 if (ret != 0)
1161 pr_err("%s DAPM post-event failed: %d\n",
1162 w->name, ret);
1163 }
1164 }
1165
1166 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1167 * they're changing state.
1168 */
1169 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1170 {
1171 struct snd_soc_dapm_context *d = data;
1172 int ret;
1173
1174 /* If we're off and we're not supposed to be go into STANDBY */
1175 if (d->bias_level == SND_SOC_BIAS_OFF &&
1176 d->target_bias_level != SND_SOC_BIAS_OFF) {
1177 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1178 if (ret != 0)
1179 dev_err(d->dev,
1180 "Failed to turn on bias: %d\n", ret);
1181 }
1182
1183 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1184 if (d->bias_level != d->target_bias_level) {
1185 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1186 if (ret != 0)
1187 dev_err(d->dev,
1188 "Failed to prepare bias: %d\n", ret);
1189 }
1190 }
1191
1192 /* Async callback run prior to DAPM sequences - brings to their final
1193 * state.
1194 */
1195 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1196 {
1197 struct snd_soc_dapm_context *d = data;
1198 int ret;
1199
1200 /* If we just powered the last thing off drop to standby bias */
1201 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1202 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1203 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1204 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1205 if (ret != 0)
1206 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1207 ret);
1208 }
1209
1210 /* If we're in standby and can support bias off then do that */
1211 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1212 d->target_bias_level == SND_SOC_BIAS_OFF) {
1213 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1214 if (ret != 0)
1215 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1216 }
1217
1218 /* If we just powered up then move to active bias */
1219 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1220 d->target_bias_level == SND_SOC_BIAS_ON) {
1221 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1222 if (ret != 0)
1223 dev_err(d->dev, "Failed to apply active bias: %d\n",
1224 ret);
1225 }
1226 }
1227
1228 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1229 bool power, bool connect)
1230 {
1231 /* If a connection is being made or broken then that update
1232 * will have marked the peer dirty, otherwise the widgets are
1233 * not connected and this update has no impact. */
1234 if (!connect)
1235 return;
1236
1237 /* If the peer is already in the state we're moving to then we
1238 * won't have an impact on it. */
1239 if (power != peer->power)
1240 dapm_mark_dirty(peer, "peer state change");
1241 }
1242
1243 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1244 struct list_head *up_list,
1245 struct list_head *down_list)
1246 {
1247 struct snd_soc_dapm_path *path;
1248
1249 if (w->power == power)
1250 return;
1251
1252 trace_snd_soc_dapm_widget_power(w, power);
1253
1254 /* If we changed our power state perhaps our neigbours changed
1255 * also.
1256 */
1257 list_for_each_entry(path, &w->sources, list_sink) {
1258 if (path->source) {
1259 dapm_widget_set_peer_power(path->source, power,
1260 path->connect);
1261 }
1262 }
1263 switch (w->id) {
1264 case snd_soc_dapm_supply:
1265 /* Supplies can't affect their outputs, only their inputs */
1266 break;
1267 default:
1268 list_for_each_entry(path, &w->sinks, list_source) {
1269 if (path->sink) {
1270 dapm_widget_set_peer_power(path->sink, power,
1271 path->connect);
1272 }
1273 }
1274 break;
1275 }
1276
1277 if (power)
1278 dapm_seq_insert(w, up_list, true);
1279 else
1280 dapm_seq_insert(w, down_list, false);
1281
1282 w->power = power;
1283 }
1284
1285 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1286 struct list_head *up_list,
1287 struct list_head *down_list)
1288 {
1289 int power;
1290
1291 switch (w->id) {
1292 case snd_soc_dapm_pre:
1293 dapm_seq_insert(w, down_list, false);
1294 break;
1295 case snd_soc_dapm_post:
1296 dapm_seq_insert(w, up_list, true);
1297 break;
1298
1299 default:
1300 power = dapm_widget_power_check(w);
1301
1302 dapm_widget_set_power(w, power, up_list, down_list);
1303 break;
1304 }
1305 }
1306
1307 /*
1308 * Scan each dapm widget for complete audio path.
1309 * A complete path is a route that has valid endpoints i.e.:-
1310 *
1311 * o DAC to output pin.
1312 * o Input Pin to ADC.
1313 * o Input pin to Output pin (bypass, sidetone)
1314 * o DAC to ADC (loopback).
1315 */
1316 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1317 {
1318 struct snd_soc_card *card = dapm->card;
1319 struct snd_soc_dapm_widget *w;
1320 struct snd_soc_dapm_context *d;
1321 LIST_HEAD(up_list);
1322 LIST_HEAD(down_list);
1323 LIST_HEAD(async_domain);
1324 enum snd_soc_bias_level bias;
1325
1326 trace_snd_soc_dapm_start(card);
1327
1328 list_for_each_entry(d, &card->dapm_list, list) {
1329 if (d->n_widgets || d->codec == NULL) {
1330 if (d->idle_bias_off)
1331 d->target_bias_level = SND_SOC_BIAS_OFF;
1332 else
1333 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1334 }
1335 }
1336
1337 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
1338
1339 list_for_each_entry(w, &card->widgets, list) {
1340 w->power_checked = false;
1341 }
1342
1343 /* Check which widgets we need to power and store them in
1344 * lists indicating if they should be powered up or down. We
1345 * only check widgets that have been flagged as dirty but note
1346 * that new widgets may be added to the dirty list while we
1347 * iterate.
1348 */
1349 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1350 dapm_power_one_widget(w, &up_list, &down_list);
1351 }
1352
1353 list_for_each_entry(w, &card->widgets, list) {
1354 list_del_init(&w->dirty);
1355
1356 if (w->power) {
1357 d = w->dapm;
1358
1359 /* Supplies and micbiases only bring the
1360 * context up to STANDBY as unless something
1361 * else is active and passing audio they
1362 * generally don't require full power.
1363 */
1364 switch (w->id) {
1365 case snd_soc_dapm_supply:
1366 case snd_soc_dapm_micbias:
1367 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1368 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1369 break;
1370 default:
1371 d->target_bias_level = SND_SOC_BIAS_ON;
1372 break;
1373 }
1374 }
1375
1376 }
1377
1378 /* If there are no DAPM widgets then try to figure out power from the
1379 * event type.
1380 */
1381 if (!dapm->n_widgets) {
1382 switch (event) {
1383 case SND_SOC_DAPM_STREAM_START:
1384 case SND_SOC_DAPM_STREAM_RESUME:
1385 dapm->target_bias_level = SND_SOC_BIAS_ON;
1386 break;
1387 case SND_SOC_DAPM_STREAM_STOP:
1388 if (dapm->codec->active)
1389 dapm->target_bias_level = SND_SOC_BIAS_ON;
1390 else
1391 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1392 break;
1393 case SND_SOC_DAPM_STREAM_SUSPEND:
1394 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1395 break;
1396 case SND_SOC_DAPM_STREAM_NOP:
1397 dapm->target_bias_level = dapm->bias_level;
1398 break;
1399 default:
1400 break;
1401 }
1402 }
1403
1404 /* Force all contexts in the card to the same bias state if
1405 * they're not ground referenced.
1406 */
1407 bias = SND_SOC_BIAS_OFF;
1408 list_for_each_entry(d, &card->dapm_list, list)
1409 if (d->target_bias_level > bias)
1410 bias = d->target_bias_level;
1411 list_for_each_entry(d, &card->dapm_list, list)
1412 if (!d->idle_bias_off)
1413 d->target_bias_level = bias;
1414
1415 trace_snd_soc_dapm_walk_done(card);
1416
1417 /* Run all the bias changes in parallel */
1418 list_for_each_entry(d, &dapm->card->dapm_list, list)
1419 async_schedule_domain(dapm_pre_sequence_async, d,
1420 &async_domain);
1421 async_synchronize_full_domain(&async_domain);
1422
1423 /* Power down widgets first; try to avoid amplifying pops. */
1424 dapm_seq_run(dapm, &down_list, event, false);
1425
1426 dapm_widget_update(dapm);
1427
1428 /* Now power up. */
1429 dapm_seq_run(dapm, &up_list, event, true);
1430
1431 /* Run all the bias changes in parallel */
1432 list_for_each_entry(d, &dapm->card->dapm_list, list)
1433 async_schedule_domain(dapm_post_sequence_async, d,
1434 &async_domain);
1435 async_synchronize_full_domain(&async_domain);
1436
1437 pop_dbg(dapm->dev, card->pop_time,
1438 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1439 pop_wait(card->pop_time);
1440
1441 trace_snd_soc_dapm_done(card);
1442
1443 return 0;
1444 }
1445
1446 #ifdef CONFIG_DEBUG_FS
1447 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1448 {
1449 file->private_data = inode->i_private;
1450 return 0;
1451 }
1452
1453 static ssize_t dapm_widget_power_read_file(struct file *file,
1454 char __user *user_buf,
1455 size_t count, loff_t *ppos)
1456 {
1457 struct snd_soc_dapm_widget *w = file->private_data;
1458 char *buf;
1459 int in, out;
1460 ssize_t ret;
1461 struct snd_soc_dapm_path *p = NULL;
1462
1463 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1464 if (!buf)
1465 return -ENOMEM;
1466
1467 in = is_connected_input_ep(w);
1468 dapm_clear_walk(w->dapm);
1469 out = is_connected_output_ep(w);
1470 dapm_clear_walk(w->dapm);
1471
1472 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1473 w->name, w->power ? "On" : "Off", in, out);
1474
1475 if (w->reg >= 0)
1476 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1477 " - R%d(0x%x) bit %d",
1478 w->reg, w->reg, w->shift);
1479
1480 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1481
1482 if (w->sname)
1483 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1484 w->sname,
1485 w->active ? "active" : "inactive");
1486
1487 list_for_each_entry(p, &w->sources, list_sink) {
1488 if (p->connected && !p->connected(w, p->sink))
1489 continue;
1490
1491 if (p->connect)
1492 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1493 " in \"%s\" \"%s\"\n",
1494 p->name ? p->name : "static",
1495 p->source->name);
1496 }
1497 list_for_each_entry(p, &w->sinks, list_source) {
1498 if (p->connected && !p->connected(w, p->sink))
1499 continue;
1500
1501 if (p->connect)
1502 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1503 " out \"%s\" \"%s\"\n",
1504 p->name ? p->name : "static",
1505 p->sink->name);
1506 }
1507
1508 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1509
1510 kfree(buf);
1511 return ret;
1512 }
1513
1514 static const struct file_operations dapm_widget_power_fops = {
1515 .open = dapm_widget_power_open_file,
1516 .read = dapm_widget_power_read_file,
1517 .llseek = default_llseek,
1518 };
1519
1520 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1521 {
1522 file->private_data = inode->i_private;
1523 return 0;
1524 }
1525
1526 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1527 size_t count, loff_t *ppos)
1528 {
1529 struct snd_soc_dapm_context *dapm = file->private_data;
1530 char *level;
1531
1532 switch (dapm->bias_level) {
1533 case SND_SOC_BIAS_ON:
1534 level = "On\n";
1535 break;
1536 case SND_SOC_BIAS_PREPARE:
1537 level = "Prepare\n";
1538 break;
1539 case SND_SOC_BIAS_STANDBY:
1540 level = "Standby\n";
1541 break;
1542 case SND_SOC_BIAS_OFF:
1543 level = "Off\n";
1544 break;
1545 default:
1546 BUG();
1547 level = "Unknown\n";
1548 break;
1549 }
1550
1551 return simple_read_from_buffer(user_buf, count, ppos, level,
1552 strlen(level));
1553 }
1554
1555 static const struct file_operations dapm_bias_fops = {
1556 .open = dapm_bias_open_file,
1557 .read = dapm_bias_read_file,
1558 .llseek = default_llseek,
1559 };
1560
1561 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1562 struct dentry *parent)
1563 {
1564 struct dentry *d;
1565
1566 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1567
1568 if (!dapm->debugfs_dapm) {
1569 printk(KERN_WARNING
1570 "Failed to create DAPM debugfs directory\n");
1571 return;
1572 }
1573
1574 d = debugfs_create_file("bias_level", 0444,
1575 dapm->debugfs_dapm, dapm,
1576 &dapm_bias_fops);
1577 if (!d)
1578 dev_warn(dapm->dev,
1579 "ASoC: Failed to create bias level debugfs file\n");
1580 }
1581
1582 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1583 {
1584 struct snd_soc_dapm_context *dapm = w->dapm;
1585 struct dentry *d;
1586
1587 if (!dapm->debugfs_dapm || !w->name)
1588 return;
1589
1590 d = debugfs_create_file(w->name, 0444,
1591 dapm->debugfs_dapm, w,
1592 &dapm_widget_power_fops);
1593 if (!d)
1594 dev_warn(w->dapm->dev,
1595 "ASoC: Failed to create %s debugfs file\n",
1596 w->name);
1597 }
1598
1599 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1600 {
1601 debugfs_remove_recursive(dapm->debugfs_dapm);
1602 }
1603
1604 #else
1605 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1606 struct dentry *parent)
1607 {
1608 }
1609
1610 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1611 {
1612 }
1613
1614 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1615 {
1616 }
1617
1618 #endif
1619
1620 /* test and update the power status of a mux widget */
1621 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1622 struct snd_kcontrol *kcontrol, int change,
1623 int mux, struct soc_enum *e)
1624 {
1625 struct snd_soc_dapm_path *path;
1626 int found = 0;
1627
1628 if (widget->id != snd_soc_dapm_mux &&
1629 widget->id != snd_soc_dapm_virt_mux &&
1630 widget->id != snd_soc_dapm_value_mux)
1631 return -ENODEV;
1632
1633 if (!change)
1634 return 0;
1635
1636 /* find dapm widget path assoc with kcontrol */
1637 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1638 if (path->kcontrol != kcontrol)
1639 continue;
1640
1641 if (!path->name || !e->texts[mux])
1642 continue;
1643
1644 found = 1;
1645 /* we now need to match the string in the enum to the path */
1646 if (!(strcmp(path->name, e->texts[mux]))) {
1647 path->connect = 1; /* new connection */
1648 dapm_mark_dirty(path->source, "mux connection");
1649 } else {
1650 if (path->connect)
1651 dapm_mark_dirty(path->source,
1652 "mux disconnection");
1653 path->connect = 0; /* old connection must be powered down */
1654 }
1655 }
1656
1657 if (found) {
1658 dapm_mark_dirty(widget, "mux change");
1659 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1660 }
1661
1662 return 0;
1663 }
1664
1665 /* test and update the power status of a mixer or switch widget */
1666 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1667 struct snd_kcontrol *kcontrol, int connect)
1668 {
1669 struct snd_soc_dapm_path *path;
1670 int found = 0;
1671
1672 if (widget->id != snd_soc_dapm_mixer &&
1673 widget->id != snd_soc_dapm_mixer_named_ctl &&
1674 widget->id != snd_soc_dapm_switch)
1675 return -ENODEV;
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 /* found, now check type */
1683 found = 1;
1684 path->connect = connect;
1685 dapm_mark_dirty(path->source, "mixer connection");
1686 }
1687
1688 if (found) {
1689 dapm_mark_dirty(widget, "mixer update");
1690 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1691 }
1692
1693 return 0;
1694 }
1695
1696 /* show dapm widget status in sys fs */
1697 static ssize_t dapm_widget_show(struct device *dev,
1698 struct device_attribute *attr, char *buf)
1699 {
1700 struct snd_soc_pcm_runtime *rtd =
1701 container_of(dev, struct snd_soc_pcm_runtime, dev);
1702 struct snd_soc_codec *codec =rtd->codec;
1703 struct snd_soc_dapm_widget *w;
1704 int count = 0;
1705 char *state = "not set";
1706
1707 list_for_each_entry(w, &codec->card->widgets, list) {
1708 if (w->dapm != &codec->dapm)
1709 continue;
1710
1711 /* only display widgets that burnm power */
1712 switch (w->id) {
1713 case snd_soc_dapm_hp:
1714 case snd_soc_dapm_mic:
1715 case snd_soc_dapm_spk:
1716 case snd_soc_dapm_line:
1717 case snd_soc_dapm_micbias:
1718 case snd_soc_dapm_dac:
1719 case snd_soc_dapm_adc:
1720 case snd_soc_dapm_pga:
1721 case snd_soc_dapm_out_drv:
1722 case snd_soc_dapm_mixer:
1723 case snd_soc_dapm_mixer_named_ctl:
1724 case snd_soc_dapm_supply:
1725 if (w->name)
1726 count += sprintf(buf + count, "%s: %s\n",
1727 w->name, w->power ? "On":"Off");
1728 break;
1729 default:
1730 break;
1731 }
1732 }
1733
1734 switch (codec->dapm.bias_level) {
1735 case SND_SOC_BIAS_ON:
1736 state = "On";
1737 break;
1738 case SND_SOC_BIAS_PREPARE:
1739 state = "Prepare";
1740 break;
1741 case SND_SOC_BIAS_STANDBY:
1742 state = "Standby";
1743 break;
1744 case SND_SOC_BIAS_OFF:
1745 state = "Off";
1746 break;
1747 }
1748 count += sprintf(buf + count, "PM State: %s\n", state);
1749
1750 return count;
1751 }
1752
1753 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1754
1755 int snd_soc_dapm_sys_add(struct device *dev)
1756 {
1757 return device_create_file(dev, &dev_attr_dapm_widget);
1758 }
1759
1760 static void snd_soc_dapm_sys_remove(struct device *dev)
1761 {
1762 device_remove_file(dev, &dev_attr_dapm_widget);
1763 }
1764
1765 /* free all dapm widgets and resources */
1766 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1767 {
1768 struct snd_soc_dapm_widget *w, *next_w;
1769 struct snd_soc_dapm_path *p, *next_p;
1770
1771 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1772 if (w->dapm != dapm)
1773 continue;
1774 list_del(&w->list);
1775 /*
1776 * remove source and sink paths associated to this widget.
1777 * While removing the path, remove reference to it from both
1778 * source and sink widgets so that path is removed only once.
1779 */
1780 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1781 list_del(&p->list_sink);
1782 list_del(&p->list_source);
1783 list_del(&p->list);
1784 kfree(p->long_name);
1785 kfree(p);
1786 }
1787 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1788 list_del(&p->list_sink);
1789 list_del(&p->list_source);
1790 list_del(&p->list);
1791 kfree(p->long_name);
1792 kfree(p);
1793 }
1794 kfree(w->kcontrols);
1795 kfree(w->name);
1796 kfree(w);
1797 }
1798 }
1799
1800 static struct snd_soc_dapm_widget *dapm_find_widget(
1801 struct snd_soc_dapm_context *dapm, const char *pin,
1802 bool search_other_contexts)
1803 {
1804 struct snd_soc_dapm_widget *w;
1805 struct snd_soc_dapm_widget *fallback = NULL;
1806
1807 list_for_each_entry(w, &dapm->card->widgets, list) {
1808 if (!strcmp(w->name, pin)) {
1809 if (w->dapm == dapm)
1810 return w;
1811 else
1812 fallback = w;
1813 }
1814 }
1815
1816 if (search_other_contexts)
1817 return fallback;
1818
1819 return NULL;
1820 }
1821
1822 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1823 const char *pin, int status)
1824 {
1825 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1826
1827 if (!w) {
1828 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1829 return -EINVAL;
1830 }
1831
1832 w->connected = status;
1833 if (status == 0)
1834 w->force = 0;
1835 dapm_mark_dirty(w, "pin configuration");
1836
1837 return 0;
1838 }
1839
1840 /**
1841 * snd_soc_dapm_sync - scan and power dapm paths
1842 * @dapm: DAPM context
1843 *
1844 * Walks all dapm audio paths and powers widgets according to their
1845 * stream or path usage.
1846 *
1847 * Returns 0 for success.
1848 */
1849 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1850 {
1851 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1852 }
1853 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1854
1855 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1856 const struct snd_soc_dapm_route *route)
1857 {
1858 struct snd_soc_dapm_path *path;
1859 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1860 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1861 const char *sink;
1862 const char *control = route->control;
1863 const char *source;
1864 char prefixed_sink[80];
1865 char prefixed_source[80];
1866 int ret = 0;
1867
1868 if (dapm->codec && dapm->codec->name_prefix) {
1869 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1870 dapm->codec->name_prefix, route->sink);
1871 sink = prefixed_sink;
1872 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1873 dapm->codec->name_prefix, route->source);
1874 source = prefixed_source;
1875 } else {
1876 sink = route->sink;
1877 source = route->source;
1878 }
1879
1880 /*
1881 * find src and dest widgets over all widgets but favor a widget from
1882 * current DAPM context
1883 */
1884 list_for_each_entry(w, &dapm->card->widgets, list) {
1885 if (!wsink && !(strcmp(w->name, sink))) {
1886 wtsink = w;
1887 if (w->dapm == dapm)
1888 wsink = w;
1889 continue;
1890 }
1891 if (!wsource && !(strcmp(w->name, source))) {
1892 wtsource = w;
1893 if (w->dapm == dapm)
1894 wsource = w;
1895 }
1896 }
1897 /* use widget from another DAPM context if not found from this */
1898 if (!wsink)
1899 wsink = wtsink;
1900 if (!wsource)
1901 wsource = wtsource;
1902
1903 if (wsource == NULL || wsink == NULL)
1904 return -ENODEV;
1905
1906 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1907 if (!path)
1908 return -ENOMEM;
1909
1910 path->source = wsource;
1911 path->sink = wsink;
1912 path->connected = route->connected;
1913 INIT_LIST_HEAD(&path->list);
1914 INIT_LIST_HEAD(&path->list_source);
1915 INIT_LIST_HEAD(&path->list_sink);
1916
1917 /* check for external widgets */
1918 if (wsink->id == snd_soc_dapm_input) {
1919 if (wsource->id == snd_soc_dapm_micbias ||
1920 wsource->id == snd_soc_dapm_mic ||
1921 wsource->id == snd_soc_dapm_line ||
1922 wsource->id == snd_soc_dapm_output)
1923 wsink->ext = 1;
1924 }
1925 if (wsource->id == snd_soc_dapm_output) {
1926 if (wsink->id == snd_soc_dapm_spk ||
1927 wsink->id == snd_soc_dapm_hp ||
1928 wsink->id == snd_soc_dapm_line ||
1929 wsink->id == snd_soc_dapm_input)
1930 wsource->ext = 1;
1931 }
1932
1933 /* connect static paths */
1934 if (control == NULL) {
1935 list_add(&path->list, &dapm->card->paths);
1936 list_add(&path->list_sink, &wsink->sources);
1937 list_add(&path->list_source, &wsource->sinks);
1938 path->connect = 1;
1939 return 0;
1940 }
1941
1942 /* connect dynamic paths */
1943 switch (wsink->id) {
1944 case snd_soc_dapm_adc:
1945 case snd_soc_dapm_dac:
1946 case snd_soc_dapm_pga:
1947 case snd_soc_dapm_out_drv:
1948 case snd_soc_dapm_input:
1949 case snd_soc_dapm_output:
1950 case snd_soc_dapm_micbias:
1951 case snd_soc_dapm_vmid:
1952 case snd_soc_dapm_pre:
1953 case snd_soc_dapm_post:
1954 case snd_soc_dapm_supply:
1955 case snd_soc_dapm_aif_in:
1956 case snd_soc_dapm_aif_out:
1957 list_add(&path->list, &dapm->card->paths);
1958 list_add(&path->list_sink, &wsink->sources);
1959 list_add(&path->list_source, &wsource->sinks);
1960 path->connect = 1;
1961 return 0;
1962 case snd_soc_dapm_mux:
1963 case snd_soc_dapm_virt_mux:
1964 case snd_soc_dapm_value_mux:
1965 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1966 &wsink->kcontrol_news[0]);
1967 if (ret != 0)
1968 goto err;
1969 break;
1970 case snd_soc_dapm_switch:
1971 case snd_soc_dapm_mixer:
1972 case snd_soc_dapm_mixer_named_ctl:
1973 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1974 if (ret != 0)
1975 goto err;
1976 break;
1977 case snd_soc_dapm_hp:
1978 case snd_soc_dapm_mic:
1979 case snd_soc_dapm_line:
1980 case snd_soc_dapm_spk:
1981 list_add(&path->list, &dapm->card->paths);
1982 list_add(&path->list_sink, &wsink->sources);
1983 list_add(&path->list_source, &wsource->sinks);
1984 path->connect = 0;
1985 return 0;
1986 }
1987 return 0;
1988
1989 err:
1990 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1991 source, control, sink);
1992 kfree(path);
1993 return ret;
1994 }
1995
1996 /**
1997 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1998 * @dapm: DAPM context
1999 * @route: audio routes
2000 * @num: number of routes
2001 *
2002 * Connects 2 dapm widgets together via a named audio path. The sink is
2003 * the widget receiving the audio signal, whilst the source is the sender
2004 * of the audio signal.
2005 *
2006 * Returns 0 for success else error. On error all resources can be freed
2007 * with a call to snd_soc_card_free().
2008 */
2009 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2010 const struct snd_soc_dapm_route *route, int num)
2011 {
2012 int i, ret;
2013
2014 for (i = 0; i < num; i++) {
2015 ret = snd_soc_dapm_add_route(dapm, route);
2016 if (ret < 0) {
2017 dev_err(dapm->dev, "Failed to add route %s->%s\n",
2018 route->source, route->sink);
2019 return ret;
2020 }
2021 route++;
2022 }
2023
2024 return 0;
2025 }
2026 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2027
2028 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2029 const struct snd_soc_dapm_route *route)
2030 {
2031 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2032 route->source,
2033 true);
2034 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2035 route->sink,
2036 true);
2037 struct snd_soc_dapm_path *path;
2038 int count = 0;
2039
2040 if (!source) {
2041 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
2042 route->source);
2043 return -ENODEV;
2044 }
2045
2046 if (!sink) {
2047 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
2048 route->sink);
2049 return -ENODEV;
2050 }
2051
2052 if (route->control || route->connected)
2053 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
2054 route->source, route->sink);
2055
2056 list_for_each_entry(path, &source->sinks, list_source) {
2057 if (path->sink == sink) {
2058 path->weak = 1;
2059 count++;
2060 }
2061 }
2062
2063 if (count == 0)
2064 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
2065 route->source, route->sink);
2066 if (count > 1)
2067 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
2068 count, route->source, route->sink);
2069
2070 return 0;
2071 }
2072
2073 /**
2074 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2075 * @dapm: DAPM context
2076 * @route: audio routes
2077 * @num: number of routes
2078 *
2079 * Mark existing routes matching those specified in the passed array
2080 * as being weak, meaning that they are ignored for the purpose of
2081 * power decisions. The main intended use case is for sidetone paths
2082 * which couple audio between other independent paths if they are both
2083 * active in order to make the combination work better at the user
2084 * level but which aren't intended to be "used".
2085 *
2086 * Note that CODEC drivers should not use this as sidetone type paths
2087 * can frequently also be used as bypass paths.
2088 */
2089 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2090 const struct snd_soc_dapm_route *route, int num)
2091 {
2092 int i, err;
2093 int ret = 0;
2094
2095 for (i = 0; i < num; i++) {
2096 err = snd_soc_dapm_weak_route(dapm, route);
2097 if (err)
2098 ret = err;
2099 route++;
2100 }
2101
2102 return ret;
2103 }
2104 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2105
2106 /**
2107 * snd_soc_dapm_new_widgets - add new dapm widgets
2108 * @dapm: DAPM context
2109 *
2110 * Checks the codec for any new dapm widgets and creates them if found.
2111 *
2112 * Returns 0 for success.
2113 */
2114 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2115 {
2116 struct snd_soc_dapm_widget *w;
2117 unsigned int val;
2118
2119 list_for_each_entry(w, &dapm->card->widgets, list)
2120 {
2121 if (w->new)
2122 continue;
2123
2124 if (w->num_kcontrols) {
2125 w->kcontrols = kzalloc(w->num_kcontrols *
2126 sizeof(struct snd_kcontrol *),
2127 GFP_KERNEL);
2128 if (!w->kcontrols)
2129 return -ENOMEM;
2130 }
2131
2132 switch(w->id) {
2133 case snd_soc_dapm_switch:
2134 case snd_soc_dapm_mixer:
2135 case snd_soc_dapm_mixer_named_ctl:
2136 w->power_check = dapm_generic_check_power;
2137 dapm_new_mixer(w);
2138 break;
2139 case snd_soc_dapm_mux:
2140 case snd_soc_dapm_virt_mux:
2141 case snd_soc_dapm_value_mux:
2142 w->power_check = dapm_generic_check_power;
2143 dapm_new_mux(w);
2144 break;
2145 case snd_soc_dapm_adc:
2146 case snd_soc_dapm_aif_out:
2147 w->power_check = dapm_adc_check_power;
2148 break;
2149 case snd_soc_dapm_dac:
2150 case snd_soc_dapm_aif_in:
2151 w->power_check = dapm_dac_check_power;
2152 break;
2153 case snd_soc_dapm_pga:
2154 case snd_soc_dapm_out_drv:
2155 w->power_check = dapm_generic_check_power;
2156 dapm_new_pga(w);
2157 break;
2158 case snd_soc_dapm_input:
2159 case snd_soc_dapm_output:
2160 case snd_soc_dapm_micbias:
2161 case snd_soc_dapm_spk:
2162 case snd_soc_dapm_hp:
2163 case snd_soc_dapm_mic:
2164 case snd_soc_dapm_line:
2165 w->power_check = dapm_generic_check_power;
2166 break;
2167 case snd_soc_dapm_supply:
2168 w->power_check = dapm_supply_check_power;
2169 case snd_soc_dapm_vmid:
2170 case snd_soc_dapm_pre:
2171 case snd_soc_dapm_post:
2172 break;
2173 }
2174
2175 if (!w->power_check)
2176 w->power_check = dapm_always_on_check_power;
2177
2178 /* Read the initial power state from the device */
2179 if (w->reg >= 0) {
2180 val = soc_widget_read(w, w->reg);
2181 val &= 1 << w->shift;
2182 if (w->invert)
2183 val = !val;
2184
2185 if (val)
2186 w->power = 1;
2187 }
2188
2189 w->new = 1;
2190
2191 list_add(&w->dirty, &(w->dapm->card->dapm_dirty));
2192 dapm_debugfs_add_widget(w);
2193 }
2194
2195 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2196 return 0;
2197 }
2198 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2199
2200 /**
2201 * snd_soc_dapm_get_volsw - dapm mixer get callback
2202 * @kcontrol: mixer control
2203 * @ucontrol: control element information
2204 *
2205 * Callback to get the value of a dapm mixer control.
2206 *
2207 * Returns 0 for success.
2208 */
2209 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2210 struct snd_ctl_elem_value *ucontrol)
2211 {
2212 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2213 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2214 struct soc_mixer_control *mc =
2215 (struct soc_mixer_control *)kcontrol->private_value;
2216 unsigned int reg = mc->reg;
2217 unsigned int shift = mc->shift;
2218 unsigned int rshift = mc->rshift;
2219 int max = mc->max;
2220 unsigned int invert = mc->invert;
2221 unsigned int mask = (1 << fls(max)) - 1;
2222
2223 ucontrol->value.integer.value[0] =
2224 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2225 if (shift != rshift)
2226 ucontrol->value.integer.value[1] =
2227 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2228 if (invert) {
2229 ucontrol->value.integer.value[0] =
2230 max - ucontrol->value.integer.value[0];
2231 if (shift != rshift)
2232 ucontrol->value.integer.value[1] =
2233 max - ucontrol->value.integer.value[1];
2234 }
2235
2236 return 0;
2237 }
2238 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2239
2240 /**
2241 * snd_soc_dapm_put_volsw - dapm mixer set callback
2242 * @kcontrol: mixer control
2243 * @ucontrol: control element information
2244 *
2245 * Callback to set the value of a dapm mixer control.
2246 *
2247 * Returns 0 for success.
2248 */
2249 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2250 struct snd_ctl_elem_value *ucontrol)
2251 {
2252 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2253 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2254 struct snd_soc_codec *codec = widget->codec;
2255 struct soc_mixer_control *mc =
2256 (struct soc_mixer_control *)kcontrol->private_value;
2257 unsigned int reg = mc->reg;
2258 unsigned int shift = mc->shift;
2259 int max = mc->max;
2260 unsigned int mask = (1 << fls(max)) - 1;
2261 unsigned int invert = mc->invert;
2262 unsigned int val;
2263 int connect, change;
2264 struct snd_soc_dapm_update update;
2265 int wi;
2266
2267 val = (ucontrol->value.integer.value[0] & mask);
2268
2269 if (invert)
2270 val = max - val;
2271 mask = mask << shift;
2272 val = val << shift;
2273
2274 if (val)
2275 /* new connection */
2276 connect = invert ? 0 : 1;
2277 else
2278 /* old connection must be powered down */
2279 connect = invert ? 1 : 0;
2280
2281 mutex_lock(&codec->mutex);
2282
2283 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2284 if (change) {
2285 for (wi = 0; wi < wlist->num_widgets; wi++) {
2286 widget = wlist->widgets[wi];
2287
2288 widget->value = val;
2289
2290 update.kcontrol = kcontrol;
2291 update.widget = widget;
2292 update.reg = reg;
2293 update.mask = mask;
2294 update.val = val;
2295 widget->dapm->update = &update;
2296
2297 dapm_mixer_update_power(widget, kcontrol, connect);
2298
2299 widget->dapm->update = NULL;
2300 }
2301 }
2302
2303 mutex_unlock(&codec->mutex);
2304 return 0;
2305 }
2306 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2307
2308 /**
2309 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2310 * @kcontrol: mixer control
2311 * @ucontrol: control element information
2312 *
2313 * Callback to get the value of a dapm enumerated double mixer control.
2314 *
2315 * Returns 0 for success.
2316 */
2317 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2318 struct snd_ctl_elem_value *ucontrol)
2319 {
2320 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2321 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2322 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2323 unsigned int val, bitmask;
2324
2325 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2326 ;
2327 val = snd_soc_read(widget->codec, e->reg);
2328 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2329 if (e->shift_l != e->shift_r)
2330 ucontrol->value.enumerated.item[1] =
2331 (val >> e->shift_r) & (bitmask - 1);
2332
2333 return 0;
2334 }
2335 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2336
2337 /**
2338 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2339 * @kcontrol: mixer control
2340 * @ucontrol: control element information
2341 *
2342 * Callback to set the value of a dapm enumerated double mixer control.
2343 *
2344 * Returns 0 for success.
2345 */
2346 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2347 struct snd_ctl_elem_value *ucontrol)
2348 {
2349 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2350 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2351 struct snd_soc_codec *codec = widget->codec;
2352 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2353 unsigned int val, mux, change;
2354 unsigned int mask, bitmask;
2355 struct snd_soc_dapm_update update;
2356 int wi;
2357
2358 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2359 ;
2360 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2361 return -EINVAL;
2362 mux = ucontrol->value.enumerated.item[0];
2363 val = mux << e->shift_l;
2364 mask = (bitmask - 1) << e->shift_l;
2365 if (e->shift_l != e->shift_r) {
2366 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2367 return -EINVAL;
2368 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2369 mask |= (bitmask - 1) << e->shift_r;
2370 }
2371
2372 mutex_lock(&codec->mutex);
2373
2374 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2375 if (change) {
2376 for (wi = 0; wi < wlist->num_widgets; wi++) {
2377 widget = wlist->widgets[wi];
2378
2379 widget->value = val;
2380
2381 update.kcontrol = kcontrol;
2382 update.widget = widget;
2383 update.reg = e->reg;
2384 update.mask = mask;
2385 update.val = val;
2386 widget->dapm->update = &update;
2387
2388 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2389
2390 widget->dapm->update = NULL;
2391 }
2392 }
2393
2394 mutex_unlock(&codec->mutex);
2395 return change;
2396 }
2397 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2398
2399 /**
2400 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2401 * @kcontrol: mixer control
2402 * @ucontrol: control element information
2403 *
2404 * Returns 0 for success.
2405 */
2406 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2407 struct snd_ctl_elem_value *ucontrol)
2408 {
2409 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2410 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2411
2412 ucontrol->value.enumerated.item[0] = widget->value;
2413
2414 return 0;
2415 }
2416 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2417
2418 /**
2419 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2420 * @kcontrol: mixer control
2421 * @ucontrol: control element information
2422 *
2423 * Returns 0 for success.
2424 */
2425 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2426 struct snd_ctl_elem_value *ucontrol)
2427 {
2428 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2429 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2430 struct snd_soc_codec *codec = widget->codec;
2431 struct soc_enum *e =
2432 (struct soc_enum *)kcontrol->private_value;
2433 int change;
2434 int ret = 0;
2435 int wi;
2436
2437 if (ucontrol->value.enumerated.item[0] >= e->max)
2438 return -EINVAL;
2439
2440 mutex_lock(&codec->mutex);
2441
2442 change = widget->value != ucontrol->value.enumerated.item[0];
2443 if (change) {
2444 for (wi = 0; wi < wlist->num_widgets; wi++) {
2445 widget = wlist->widgets[wi];
2446
2447 widget->value = ucontrol->value.enumerated.item[0];
2448
2449 dapm_mux_update_power(widget, kcontrol, change,
2450 widget->value, e);
2451 }
2452 }
2453
2454 mutex_unlock(&codec->mutex);
2455 return ret;
2456 }
2457 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2458
2459 /**
2460 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2461 * callback
2462 * @kcontrol: mixer control
2463 * @ucontrol: control element information
2464 *
2465 * Callback to get the value of a dapm semi enumerated double mixer control.
2466 *
2467 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2468 * used for handling bitfield coded enumeration for example.
2469 *
2470 * Returns 0 for success.
2471 */
2472 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2473 struct snd_ctl_elem_value *ucontrol)
2474 {
2475 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2476 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2477 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2478 unsigned int reg_val, val, mux;
2479
2480 reg_val = snd_soc_read(widget->codec, e->reg);
2481 val = (reg_val >> e->shift_l) & e->mask;
2482 for (mux = 0; mux < e->max; mux++) {
2483 if (val == e->values[mux])
2484 break;
2485 }
2486 ucontrol->value.enumerated.item[0] = mux;
2487 if (e->shift_l != e->shift_r) {
2488 val = (reg_val >> e->shift_r) & e->mask;
2489 for (mux = 0; mux < e->max; mux++) {
2490 if (val == e->values[mux])
2491 break;
2492 }
2493 ucontrol->value.enumerated.item[1] = mux;
2494 }
2495
2496 return 0;
2497 }
2498 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2499
2500 /**
2501 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2502 * callback
2503 * @kcontrol: mixer control
2504 * @ucontrol: control element information
2505 *
2506 * Callback to set the value of a dapm semi enumerated double mixer control.
2507 *
2508 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2509 * used for handling bitfield coded enumeration for example.
2510 *
2511 * Returns 0 for success.
2512 */
2513 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2514 struct snd_ctl_elem_value *ucontrol)
2515 {
2516 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2517 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2518 struct snd_soc_codec *codec = widget->codec;
2519 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2520 unsigned int val, mux, change;
2521 unsigned int mask;
2522 struct snd_soc_dapm_update update;
2523 int wi;
2524
2525 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2526 return -EINVAL;
2527 mux = ucontrol->value.enumerated.item[0];
2528 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2529 mask = e->mask << e->shift_l;
2530 if (e->shift_l != e->shift_r) {
2531 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2532 return -EINVAL;
2533 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2534 mask |= e->mask << e->shift_r;
2535 }
2536
2537 mutex_lock(&codec->mutex);
2538
2539 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2540 if (change) {
2541 for (wi = 0; wi < wlist->num_widgets; wi++) {
2542 widget = wlist->widgets[wi];
2543
2544 widget->value = val;
2545
2546 update.kcontrol = kcontrol;
2547 update.widget = widget;
2548 update.reg = e->reg;
2549 update.mask = mask;
2550 update.val = val;
2551 widget->dapm->update = &update;
2552
2553 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2554
2555 widget->dapm->update = NULL;
2556 }
2557 }
2558
2559 mutex_unlock(&codec->mutex);
2560 return change;
2561 }
2562 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2563
2564 /**
2565 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2566 *
2567 * @kcontrol: mixer control
2568 * @uinfo: control element information
2569 *
2570 * Callback to provide information about a pin switch control.
2571 */
2572 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2573 struct snd_ctl_elem_info *uinfo)
2574 {
2575 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2576 uinfo->count = 1;
2577 uinfo->value.integer.min = 0;
2578 uinfo->value.integer.max = 1;
2579
2580 return 0;
2581 }
2582 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2583
2584 /**
2585 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2586 *
2587 * @kcontrol: mixer control
2588 * @ucontrol: Value
2589 */
2590 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2591 struct snd_ctl_elem_value *ucontrol)
2592 {
2593 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2594 const char *pin = (const char *)kcontrol->private_value;
2595
2596 mutex_lock(&codec->mutex);
2597
2598 ucontrol->value.integer.value[0] =
2599 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2600
2601 mutex_unlock(&codec->mutex);
2602
2603 return 0;
2604 }
2605 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2606
2607 /**
2608 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2609 *
2610 * @kcontrol: mixer control
2611 * @ucontrol: Value
2612 */
2613 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2614 struct snd_ctl_elem_value *ucontrol)
2615 {
2616 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2617 const char *pin = (const char *)kcontrol->private_value;
2618
2619 mutex_lock(&codec->mutex);
2620
2621 if (ucontrol->value.integer.value[0])
2622 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2623 else
2624 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2625
2626 snd_soc_dapm_sync(&codec->dapm);
2627
2628 mutex_unlock(&codec->mutex);
2629
2630 return 0;
2631 }
2632 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2633
2634 /**
2635 * snd_soc_dapm_new_control - create new dapm control
2636 * @dapm: DAPM context
2637 * @widget: widget template
2638 *
2639 * Creates a new dapm control based upon the template.
2640 *
2641 * Returns 0 for success else error.
2642 */
2643 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2644 const struct snd_soc_dapm_widget *widget)
2645 {
2646 struct snd_soc_dapm_widget *w;
2647 size_t name_len;
2648
2649 if ((w = dapm_cnew_widget(widget)) == NULL)
2650 return -ENOMEM;
2651
2652 name_len = strlen(widget->name) + 1;
2653 if (dapm->codec && dapm->codec->name_prefix)
2654 name_len += 1 + strlen(dapm->codec->name_prefix);
2655 w->name = kmalloc(name_len, GFP_KERNEL);
2656 if (w->name == NULL) {
2657 kfree(w);
2658 return -ENOMEM;
2659 }
2660 if (dapm->codec && dapm->codec->name_prefix)
2661 snprintf(w->name, name_len, "%s %s",
2662 dapm->codec->name_prefix, widget->name);
2663 else
2664 snprintf(w->name, name_len, "%s", widget->name);
2665
2666 dapm->n_widgets++;
2667 w->dapm = dapm;
2668 w->codec = dapm->codec;
2669 w->platform = dapm->platform;
2670 INIT_LIST_HEAD(&w->sources);
2671 INIT_LIST_HEAD(&w->sinks);
2672 INIT_LIST_HEAD(&w->list);
2673 INIT_LIST_HEAD(&w->dirty);
2674 list_add(&w->list, &dapm->card->widgets);
2675
2676 /* machine layer set ups unconnected pins and insertions */
2677 w->connected = 1;
2678 return 0;
2679 }
2680 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2681
2682 /**
2683 * snd_soc_dapm_new_controls - create new dapm controls
2684 * @dapm: DAPM context
2685 * @widget: widget array
2686 * @num: number of widgets
2687 *
2688 * Creates new DAPM controls based upon the templates.
2689 *
2690 * Returns 0 for success else error.
2691 */
2692 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2693 const struct snd_soc_dapm_widget *widget,
2694 int num)
2695 {
2696 int i, ret;
2697
2698 for (i = 0; i < num; i++) {
2699 ret = snd_soc_dapm_new_control(dapm, widget);
2700 if (ret < 0) {
2701 dev_err(dapm->dev,
2702 "ASoC: Failed to create DAPM control %s: %d\n",
2703 widget->name, ret);
2704 return ret;
2705 }
2706 widget++;
2707 }
2708 return 0;
2709 }
2710 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2711
2712 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2713 const char *stream, int event)
2714 {
2715 struct snd_soc_dapm_widget *w;
2716
2717 list_for_each_entry(w, &dapm->card->widgets, list)
2718 {
2719 if (!w->sname || w->dapm != dapm)
2720 continue;
2721 dev_vdbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2722 w->name, w->sname, stream, event);
2723 if (strstr(w->sname, stream)) {
2724 dapm_mark_dirty(w, "stream event");
2725 switch(event) {
2726 case SND_SOC_DAPM_STREAM_START:
2727 w->active = 1;
2728 break;
2729 case SND_SOC_DAPM_STREAM_STOP:
2730 w->active = 0;
2731 break;
2732 case SND_SOC_DAPM_STREAM_SUSPEND:
2733 case SND_SOC_DAPM_STREAM_RESUME:
2734 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2735 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2736 break;
2737 }
2738 }
2739 }
2740
2741 dapm_power_widgets(dapm, event);
2742
2743 /* do we need to notify any clients that DAPM stream is complete */
2744 if (dapm->stream_event)
2745 dapm->stream_event(dapm, event);
2746 }
2747
2748 /**
2749 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2750 * @rtd: PCM runtime data
2751 * @stream: stream name
2752 * @event: stream event
2753 *
2754 * Sends a stream event to the dapm core. The core then makes any
2755 * necessary widget power changes.
2756 *
2757 * Returns 0 for success else error.
2758 */
2759 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2760 const char *stream, int event)
2761 {
2762 struct snd_soc_codec *codec = rtd->codec;
2763
2764 if (stream == NULL)
2765 return 0;
2766
2767 mutex_lock(&codec->mutex);
2768 soc_dapm_stream_event(&codec->dapm, stream, event);
2769 mutex_unlock(&codec->mutex);
2770 return 0;
2771 }
2772
2773 /**
2774 * snd_soc_dapm_enable_pin - enable pin.
2775 * @dapm: DAPM context
2776 * @pin: pin name
2777 *
2778 * Enables input/output pin and its parents or children widgets iff there is
2779 * a valid audio route and active audio stream.
2780 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2781 * do any widget power switching.
2782 */
2783 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2784 {
2785 return snd_soc_dapm_set_pin(dapm, pin, 1);
2786 }
2787 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2788
2789 /**
2790 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2791 * @dapm: DAPM context
2792 * @pin: pin name
2793 *
2794 * Enables input/output pin regardless of any other state. This is
2795 * intended for use with microphone bias supplies used in microphone
2796 * jack detection.
2797 *
2798 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2799 * do any widget power switching.
2800 */
2801 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2802 const char *pin)
2803 {
2804 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2805
2806 if (!w) {
2807 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2808 return -EINVAL;
2809 }
2810
2811 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2812 w->connected = 1;
2813 w->force = 1;
2814 dapm_mark_dirty(w, "force enable");
2815
2816 return 0;
2817 }
2818 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2819
2820 /**
2821 * snd_soc_dapm_disable_pin - disable pin.
2822 * @dapm: DAPM context
2823 * @pin: pin name
2824 *
2825 * Disables input/output pin and its parents or children widgets.
2826 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2827 * do any widget power switching.
2828 */
2829 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2830 const char *pin)
2831 {
2832 return snd_soc_dapm_set_pin(dapm, pin, 0);
2833 }
2834 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2835
2836 /**
2837 * snd_soc_dapm_nc_pin - permanently disable pin.
2838 * @dapm: DAPM context
2839 * @pin: pin name
2840 *
2841 * Marks the specified pin as being not connected, disabling it along
2842 * any parent or child widgets. At present this is identical to
2843 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2844 * additional things such as disabling controls which only affect
2845 * paths through the pin.
2846 *
2847 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2848 * do any widget power switching.
2849 */
2850 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2851 {
2852 return snd_soc_dapm_set_pin(dapm, pin, 0);
2853 }
2854 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2855
2856 /**
2857 * snd_soc_dapm_get_pin_status - get audio pin status
2858 * @dapm: DAPM context
2859 * @pin: audio signal pin endpoint (or start point)
2860 *
2861 * Get audio pin status - connected or disconnected.
2862 *
2863 * Returns 1 for connected otherwise 0.
2864 */
2865 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2866 const char *pin)
2867 {
2868 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2869
2870 if (w)
2871 return w->connected;
2872
2873 return 0;
2874 }
2875 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2876
2877 /**
2878 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2879 * @dapm: DAPM context
2880 * @pin: audio signal pin endpoint (or start point)
2881 *
2882 * Mark the given endpoint or pin as ignoring suspend. When the
2883 * system is disabled a path between two endpoints flagged as ignoring
2884 * suspend will not be disabled. The path must already be enabled via
2885 * normal means at suspend time, it will not be turned on if it was not
2886 * already enabled.
2887 */
2888 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2889 const char *pin)
2890 {
2891 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2892
2893 if (!w) {
2894 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2895 return -EINVAL;
2896 }
2897
2898 w->ignore_suspend = 1;
2899
2900 return 0;
2901 }
2902 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2903
2904 /**
2905 * snd_soc_dapm_free - free dapm resources
2906 * @dapm: DAPM context
2907 *
2908 * Free all dapm widgets and resources.
2909 */
2910 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2911 {
2912 snd_soc_dapm_sys_remove(dapm->dev);
2913 dapm_debugfs_cleanup(dapm);
2914 dapm_free_widgets(dapm);
2915 list_del(&dapm->list);
2916 }
2917 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2918
2919 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2920 {
2921 struct snd_soc_dapm_widget *w;
2922 LIST_HEAD(down_list);
2923 int powerdown = 0;
2924
2925 list_for_each_entry(w, &dapm->card->widgets, list) {
2926 if (w->dapm != dapm)
2927 continue;
2928 if (w->power) {
2929 dapm_seq_insert(w, &down_list, false);
2930 w->power = 0;
2931 powerdown = 1;
2932 }
2933 }
2934
2935 /* If there were no widgets to power down we're already in
2936 * standby.
2937 */
2938 if (powerdown) {
2939 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
2940 dapm_seq_run(dapm, &down_list, 0, false);
2941 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
2942 }
2943 }
2944
2945 /*
2946 * snd_soc_dapm_shutdown - callback for system shutdown
2947 */
2948 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2949 {
2950 struct snd_soc_codec *codec;
2951
2952 list_for_each_entry(codec, &card->codec_dev_list, list) {
2953 soc_dapm_shutdown_codec(&codec->dapm);
2954 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
2955 }
2956 }
2957
2958 /* Module information */
2959 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2960 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2961 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
This page took 0.175729 seconds and 6 git commands to generate.