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Merge branches 'acpica', 'acpi-tpm' and 'acpi-processor'
[deliverable/linux.git] / sound / soc / soc-dapm.c
1 /*
2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * Features:
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
15 * DACs/ADCs.
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/headphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
20 * sinks, dacs, etc
21 * o Delayed power down of audio subsystem to reduce pops between a quick
22 * device reopen.
23 *
24 */
25
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/init.h>
29 #include <linux/async.h>
30 #include <linux/delay.h>
31 #include <linux/pm.h>
32 #include <linux/bitops.h>
33 #include <linux/platform_device.h>
34 #include <linux/jiffies.h>
35 #include <linux/debugfs.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/regulator/consumer.h>
38 #include <linux/clk.h>
39 #include <linux/slab.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc.h>
44 #include <sound/initval.h>
45
46 #include <trace/events/asoc.h>
47
48 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
49
50 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
51 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
52 const char *control,
53 int (*connected)(struct snd_soc_dapm_widget *source,
54 struct snd_soc_dapm_widget *sink));
55 static struct snd_soc_dapm_widget *
56 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
57 const struct snd_soc_dapm_widget *widget);
58
59 /* dapm power sequences - make this per codec in the future */
60 static int dapm_up_seq[] = {
61 [snd_soc_dapm_pre] = 0,
62 [snd_soc_dapm_regulator_supply] = 1,
63 [snd_soc_dapm_clock_supply] = 1,
64 [snd_soc_dapm_supply] = 2,
65 [snd_soc_dapm_micbias] = 3,
66 [snd_soc_dapm_dai_link] = 2,
67 [snd_soc_dapm_dai_in] = 4,
68 [snd_soc_dapm_dai_out] = 4,
69 [snd_soc_dapm_aif_in] = 4,
70 [snd_soc_dapm_aif_out] = 4,
71 [snd_soc_dapm_mic] = 5,
72 [snd_soc_dapm_mux] = 6,
73 [snd_soc_dapm_dac] = 7,
74 [snd_soc_dapm_switch] = 8,
75 [snd_soc_dapm_mixer] = 8,
76 [snd_soc_dapm_mixer_named_ctl] = 8,
77 [snd_soc_dapm_pga] = 9,
78 [snd_soc_dapm_adc] = 10,
79 [snd_soc_dapm_out_drv] = 11,
80 [snd_soc_dapm_hp] = 11,
81 [snd_soc_dapm_spk] = 11,
82 [snd_soc_dapm_line] = 11,
83 [snd_soc_dapm_kcontrol] = 12,
84 [snd_soc_dapm_post] = 13,
85 };
86
87 static int dapm_down_seq[] = {
88 [snd_soc_dapm_pre] = 0,
89 [snd_soc_dapm_kcontrol] = 1,
90 [snd_soc_dapm_adc] = 2,
91 [snd_soc_dapm_hp] = 3,
92 [snd_soc_dapm_spk] = 3,
93 [snd_soc_dapm_line] = 3,
94 [snd_soc_dapm_out_drv] = 3,
95 [snd_soc_dapm_pga] = 4,
96 [snd_soc_dapm_switch] = 5,
97 [snd_soc_dapm_mixer_named_ctl] = 5,
98 [snd_soc_dapm_mixer] = 5,
99 [snd_soc_dapm_dac] = 6,
100 [snd_soc_dapm_mic] = 7,
101 [snd_soc_dapm_micbias] = 8,
102 [snd_soc_dapm_mux] = 9,
103 [snd_soc_dapm_aif_in] = 10,
104 [snd_soc_dapm_aif_out] = 10,
105 [snd_soc_dapm_dai_in] = 10,
106 [snd_soc_dapm_dai_out] = 10,
107 [snd_soc_dapm_dai_link] = 11,
108 [snd_soc_dapm_supply] = 12,
109 [snd_soc_dapm_clock_supply] = 13,
110 [snd_soc_dapm_regulator_supply] = 13,
111 [snd_soc_dapm_post] = 14,
112 };
113
114 static void dapm_assert_locked(struct snd_soc_dapm_context *dapm)
115 {
116 if (dapm->card && dapm->card->instantiated)
117 lockdep_assert_held(&dapm->card->dapm_mutex);
118 }
119
120 static void pop_wait(u32 pop_time)
121 {
122 if (pop_time)
123 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
124 }
125
126 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
127 {
128 va_list args;
129 char *buf;
130
131 if (!pop_time)
132 return;
133
134 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
135 if (buf == NULL)
136 return;
137
138 va_start(args, fmt);
139 vsnprintf(buf, PAGE_SIZE, fmt, args);
140 dev_info(dev, "%s", buf);
141 va_end(args);
142
143 kfree(buf);
144 }
145
146 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
147 {
148 return !list_empty(&w->dirty);
149 }
150
151 static void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
152 {
153 dapm_assert_locked(w->dapm);
154
155 if (!dapm_dirty_widget(w)) {
156 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
157 w->name, reason);
158 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
159 }
160 }
161
162 void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm)
163 {
164 struct snd_soc_card *card = dapm->card;
165 struct snd_soc_dapm_widget *w;
166
167 mutex_lock(&card->dapm_mutex);
168
169 list_for_each_entry(w, &card->widgets, list) {
170 switch (w->id) {
171 case snd_soc_dapm_input:
172 case snd_soc_dapm_output:
173 dapm_mark_dirty(w, "Rechecking inputs and outputs");
174 break;
175 default:
176 break;
177 }
178 }
179
180 mutex_unlock(&card->dapm_mutex);
181 }
182 EXPORT_SYMBOL_GPL(dapm_mark_io_dirty);
183
184 /* create a new dapm widget */
185 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
186 const struct snd_soc_dapm_widget *_widget)
187 {
188 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
189 }
190
191 struct dapm_kcontrol_data {
192 unsigned int value;
193 struct snd_soc_dapm_widget *widget;
194 struct list_head paths;
195 struct snd_soc_dapm_widget_list *wlist;
196 };
197
198 static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
199 struct snd_kcontrol *kcontrol)
200 {
201 struct dapm_kcontrol_data *data;
202 struct soc_mixer_control *mc;
203
204 data = kzalloc(sizeof(*data), GFP_KERNEL);
205 if (!data) {
206 dev_err(widget->dapm->dev,
207 "ASoC: can't allocate kcontrol data for %s\n",
208 widget->name);
209 return -ENOMEM;
210 }
211
212 INIT_LIST_HEAD(&data->paths);
213
214 switch (widget->id) {
215 case snd_soc_dapm_switch:
216 case snd_soc_dapm_mixer:
217 case snd_soc_dapm_mixer_named_ctl:
218 mc = (struct soc_mixer_control *)kcontrol->private_value;
219
220 if (mc->autodisable) {
221 struct snd_soc_dapm_widget template;
222
223 memset(&template, 0, sizeof(template));
224 template.reg = mc->reg;
225 template.mask = (1 << fls(mc->max)) - 1;
226 template.shift = mc->shift;
227 if (mc->invert)
228 template.off_val = mc->max;
229 else
230 template.off_val = 0;
231 template.on_val = template.off_val;
232 template.id = snd_soc_dapm_kcontrol;
233 template.name = kcontrol->id.name;
234
235 data->value = template.on_val;
236
237 data->widget = snd_soc_dapm_new_control(widget->dapm,
238 &template);
239 if (!data->widget) {
240 kfree(data);
241 return -ENOMEM;
242 }
243 }
244 break;
245 default:
246 break;
247 }
248
249 kcontrol->private_data = data;
250
251 return 0;
252 }
253
254 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
255 {
256 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
257 kfree(data->wlist);
258 kfree(data);
259 }
260
261 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
262 const struct snd_kcontrol *kcontrol)
263 {
264 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
265
266 return data->wlist;
267 }
268
269 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
270 struct snd_soc_dapm_widget *widget)
271 {
272 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
273 struct snd_soc_dapm_widget_list *new_wlist;
274 unsigned int n;
275
276 if (data->wlist)
277 n = data->wlist->num_widgets + 1;
278 else
279 n = 1;
280
281 new_wlist = krealloc(data->wlist,
282 sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
283 if (!new_wlist)
284 return -ENOMEM;
285
286 new_wlist->widgets[n - 1] = widget;
287 new_wlist->num_widgets = n;
288
289 data->wlist = new_wlist;
290
291 return 0;
292 }
293
294 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
295 struct snd_soc_dapm_path *path)
296 {
297 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
298
299 list_add_tail(&path->list_kcontrol, &data->paths);
300
301 if (data->widget) {
302 snd_soc_dapm_add_path(data->widget->dapm, data->widget,
303 path->source, NULL, NULL);
304 }
305 }
306
307 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
308 {
309 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
310
311 if (!data->widget)
312 return true;
313
314 return data->widget->power;
315 }
316
317 static struct list_head *dapm_kcontrol_get_path_list(
318 const struct snd_kcontrol *kcontrol)
319 {
320 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
321
322 return &data->paths;
323 }
324
325 #define dapm_kcontrol_for_each_path(path, kcontrol) \
326 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
327 list_kcontrol)
328
329 static unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
330 {
331 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
332
333 return data->value;
334 }
335
336 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
337 unsigned int value)
338 {
339 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
340
341 if (data->value == value)
342 return false;
343
344 if (data->widget)
345 data->widget->on_val = value;
346
347 data->value = value;
348
349 return true;
350 }
351
352 /**
353 * snd_soc_dapm_kcontrol_codec() - Returns the codec associated to a kcontrol
354 * @kcontrol: The kcontrol
355 */
356 struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(struct snd_kcontrol *kcontrol)
357 {
358 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->codec;
359 }
360 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_codec);
361
362 static void dapm_reset(struct snd_soc_card *card)
363 {
364 struct snd_soc_dapm_widget *w;
365
366 lockdep_assert_held(&card->dapm_mutex);
367
368 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
369
370 list_for_each_entry(w, &card->widgets, list) {
371 w->new_power = w->power;
372 w->power_checked = false;
373 w->inputs = -1;
374 w->outputs = -1;
375 }
376 }
377
378 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg,
379 unsigned int *value)
380 {
381 if (w->codec) {
382 *value = snd_soc_read(w->codec, reg);
383 return 0;
384 } else if (w->platform) {
385 *value = snd_soc_platform_read(w->platform, reg);
386 return 0;
387 }
388
389 dev_err(w->dapm->dev, "ASoC: no valid widget read method\n");
390 return -1;
391 }
392
393 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg,
394 unsigned int val)
395 {
396 if (w->codec)
397 return snd_soc_write(w->codec, reg, val);
398 else if (w->platform)
399 return snd_soc_platform_write(w->platform, reg, val);
400
401 dev_err(w->dapm->dev, "ASoC: no valid widget write method\n");
402 return -1;
403 }
404
405 static inline void soc_widget_lock(struct snd_soc_dapm_widget *w)
406 {
407 if (w->codec && !w->codec->using_regmap)
408 mutex_lock(&w->codec->mutex);
409 else if (w->platform)
410 mutex_lock(&w->platform->mutex);
411 }
412
413 static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w)
414 {
415 if (w->codec && !w->codec->using_regmap)
416 mutex_unlock(&w->codec->mutex);
417 else if (w->platform)
418 mutex_unlock(&w->platform->mutex);
419 }
420
421 static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
422 {
423 if (dapm->codec && dapm->codec->using_regmap)
424 regmap_async_complete(dapm->codec->control_data);
425 }
426
427 static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
428 unsigned short reg, unsigned int mask, unsigned int value)
429 {
430 bool change;
431 unsigned int old, new;
432 int ret;
433
434 if (w->codec && w->codec->using_regmap) {
435 ret = regmap_update_bits_check_async(w->codec->control_data,
436 reg, mask, value,
437 &change);
438 if (ret != 0)
439 return ret;
440 } else {
441 soc_widget_lock(w);
442 ret = soc_widget_read(w, reg, &old);
443 if (ret < 0) {
444 soc_widget_unlock(w);
445 return ret;
446 }
447
448 new = (old & ~mask) | (value & mask);
449 change = old != new;
450 if (change) {
451 ret = soc_widget_write(w, reg, new);
452 if (ret < 0) {
453 soc_widget_unlock(w);
454 return ret;
455 }
456 }
457 soc_widget_unlock(w);
458 }
459
460 return change;
461 }
462
463 /**
464 * snd_soc_dapm_set_bias_level - set the bias level for the system
465 * @dapm: DAPM context
466 * @level: level to configure
467 *
468 * Configure the bias (power) levels for the SoC audio device.
469 *
470 * Returns 0 for success else error.
471 */
472 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
473 enum snd_soc_bias_level level)
474 {
475 struct snd_soc_card *card = dapm->card;
476 int ret = 0;
477
478 trace_snd_soc_bias_level_start(card, level);
479
480 if (card && card->set_bias_level)
481 ret = card->set_bias_level(card, dapm, level);
482 if (ret != 0)
483 goto out;
484
485 if (dapm->codec) {
486 if (dapm->codec->driver->set_bias_level)
487 ret = dapm->codec->driver->set_bias_level(dapm->codec,
488 level);
489 else
490 dapm->bias_level = level;
491 } else if (!card || dapm != &card->dapm) {
492 dapm->bias_level = level;
493 }
494
495 if (ret != 0)
496 goto out;
497
498 if (card && card->set_bias_level_post)
499 ret = card->set_bias_level_post(card, dapm, level);
500 out:
501 trace_snd_soc_bias_level_done(card, level);
502
503 return ret;
504 }
505
506 /* connect mux widget to its interconnecting audio paths */
507 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
508 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
509 struct snd_soc_dapm_path *path, const char *control_name,
510 const struct snd_kcontrol_new *kcontrol)
511 {
512 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
513 unsigned int val, item;
514 int i;
515
516 if (e->reg != SND_SOC_NOPM) {
517 soc_widget_read(dest, e->reg, &val);
518 val = (val >> e->shift_l) & e->mask;
519 item = snd_soc_enum_val_to_item(e, val);
520 } else {
521 /* since a virtual mux has no backing registers to
522 * decide which path to connect, it will try to match
523 * with the first enumeration. This is to ensure
524 * that the default mux choice (the first) will be
525 * correctly powered up during initialization.
526 */
527 item = 0;
528 }
529
530 for (i = 0; i < e->items; i++) {
531 if (!(strcmp(control_name, e->texts[i]))) {
532 list_add(&path->list, &dapm->card->paths);
533 list_add(&path->list_sink, &dest->sources);
534 list_add(&path->list_source, &src->sinks);
535 path->name = (char*)e->texts[i];
536 if (i == item)
537 path->connect = 1;
538 else
539 path->connect = 0;
540 return 0;
541 }
542 }
543
544 return -ENODEV;
545 }
546
547 /* set up initial codec paths */
548 static void dapm_set_mixer_path_status(struct snd_soc_dapm_widget *w,
549 struct snd_soc_dapm_path *p, int i)
550 {
551 struct soc_mixer_control *mc = (struct soc_mixer_control *)
552 w->kcontrol_news[i].private_value;
553 unsigned int reg = mc->reg;
554 unsigned int shift = mc->shift;
555 unsigned int max = mc->max;
556 unsigned int mask = (1 << fls(max)) - 1;
557 unsigned int invert = mc->invert;
558 unsigned int val;
559
560 if (reg != SND_SOC_NOPM) {
561 soc_widget_read(w, reg, &val);
562 val = (val >> shift) & mask;
563 if (invert)
564 val = max - val;
565 p->connect = !!val;
566 } else {
567 p->connect = 0;
568 }
569 }
570
571 /* connect mixer widget to its interconnecting audio paths */
572 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
573 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
574 struct snd_soc_dapm_path *path, const char *control_name)
575 {
576 int i;
577
578 /* search for mixer kcontrol */
579 for (i = 0; i < dest->num_kcontrols; i++) {
580 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
581 list_add(&path->list, &dapm->card->paths);
582 list_add(&path->list_sink, &dest->sources);
583 list_add(&path->list_source, &src->sinks);
584 path->name = dest->kcontrol_news[i].name;
585 dapm_set_mixer_path_status(dest, path, i);
586 return 0;
587 }
588 }
589 return -ENODEV;
590 }
591
592 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
593 struct snd_soc_dapm_widget *kcontrolw,
594 const struct snd_kcontrol_new *kcontrol_new,
595 struct snd_kcontrol **kcontrol)
596 {
597 struct snd_soc_dapm_widget *w;
598 int i;
599
600 *kcontrol = NULL;
601
602 list_for_each_entry(w, &dapm->card->widgets, list) {
603 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
604 continue;
605 for (i = 0; i < w->num_kcontrols; i++) {
606 if (&w->kcontrol_news[i] == kcontrol_new) {
607 if (w->kcontrols)
608 *kcontrol = w->kcontrols[i];
609 return 1;
610 }
611 }
612 }
613
614 return 0;
615 }
616
617 /*
618 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
619 * create it. Either way, add the widget into the control's widget list
620 */
621 static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w,
622 int kci)
623 {
624 struct snd_soc_dapm_context *dapm = w->dapm;
625 struct snd_card *card = dapm->card->snd_card;
626 const char *prefix;
627 size_t prefix_len;
628 int shared;
629 struct snd_kcontrol *kcontrol;
630 bool wname_in_long_name, kcname_in_long_name;
631 char *long_name;
632 const char *name;
633 int ret;
634
635 if (dapm->codec)
636 prefix = dapm->codec->name_prefix;
637 else
638 prefix = NULL;
639
640 if (prefix)
641 prefix_len = strlen(prefix) + 1;
642 else
643 prefix_len = 0;
644
645 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
646 &kcontrol);
647
648 if (!kcontrol) {
649 if (shared) {
650 wname_in_long_name = false;
651 kcname_in_long_name = true;
652 } else {
653 switch (w->id) {
654 case snd_soc_dapm_switch:
655 case snd_soc_dapm_mixer:
656 wname_in_long_name = true;
657 kcname_in_long_name = true;
658 break;
659 case snd_soc_dapm_mixer_named_ctl:
660 wname_in_long_name = false;
661 kcname_in_long_name = true;
662 break;
663 case snd_soc_dapm_mux:
664 wname_in_long_name = true;
665 kcname_in_long_name = false;
666 break;
667 default:
668 return -EINVAL;
669 }
670 }
671
672 if (wname_in_long_name && kcname_in_long_name) {
673 /*
674 * The control will get a prefix from the control
675 * creation process but we're also using the same
676 * prefix for widgets so cut the prefix off the
677 * front of the widget name.
678 */
679 long_name = kasprintf(GFP_KERNEL, "%s %s",
680 w->name + prefix_len,
681 w->kcontrol_news[kci].name);
682 if (long_name == NULL)
683 return -ENOMEM;
684
685 name = long_name;
686 } else if (wname_in_long_name) {
687 long_name = NULL;
688 name = w->name + prefix_len;
689 } else {
690 long_name = NULL;
691 name = w->kcontrol_news[kci].name;
692 }
693
694 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
695 prefix);
696 kfree(long_name);
697 if (!kcontrol)
698 return -ENOMEM;
699 kcontrol->private_free = dapm_kcontrol_free;
700
701 ret = dapm_kcontrol_data_alloc(w, kcontrol);
702 if (ret) {
703 snd_ctl_free_one(kcontrol);
704 return ret;
705 }
706
707 ret = snd_ctl_add(card, kcontrol);
708 if (ret < 0) {
709 dev_err(dapm->dev,
710 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
711 w->name, name, ret);
712 return ret;
713 }
714 }
715
716 ret = dapm_kcontrol_add_widget(kcontrol, w);
717 if (ret)
718 return ret;
719
720 w->kcontrols[kci] = kcontrol;
721
722 return 0;
723 }
724
725 /* create new dapm mixer control */
726 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
727 {
728 int i, ret;
729 struct snd_soc_dapm_path *path;
730
731 /* add kcontrol */
732 for (i = 0; i < w->num_kcontrols; i++) {
733 /* match name */
734 list_for_each_entry(path, &w->sources, list_sink) {
735 /* mixer/mux paths name must match control name */
736 if (path->name != (char *)w->kcontrol_news[i].name)
737 continue;
738
739 if (w->kcontrols[i]) {
740 dapm_kcontrol_add_path(w->kcontrols[i], path);
741 continue;
742 }
743
744 ret = dapm_create_or_share_mixmux_kcontrol(w, i);
745 if (ret < 0)
746 return ret;
747
748 dapm_kcontrol_add_path(w->kcontrols[i], path);
749 }
750 }
751
752 return 0;
753 }
754
755 /* create new dapm mux control */
756 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
757 {
758 struct snd_soc_dapm_context *dapm = w->dapm;
759 struct snd_soc_dapm_path *path;
760 int ret;
761
762 if (w->num_kcontrols != 1) {
763 dev_err(dapm->dev,
764 "ASoC: mux %s has incorrect number of controls\n",
765 w->name);
766 return -EINVAL;
767 }
768
769 if (list_empty(&w->sources)) {
770 dev_err(dapm->dev, "ASoC: mux %s has no paths\n", w->name);
771 return -EINVAL;
772 }
773
774 ret = dapm_create_or_share_mixmux_kcontrol(w, 0);
775 if (ret < 0)
776 return ret;
777
778 list_for_each_entry(path, &w->sources, list_sink)
779 dapm_kcontrol_add_path(w->kcontrols[0], path);
780
781 return 0;
782 }
783
784 /* create new dapm volume control */
785 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
786 {
787 if (w->num_kcontrols)
788 dev_err(w->dapm->dev,
789 "ASoC: PGA controls not supported: '%s'\n", w->name);
790
791 return 0;
792 }
793
794 /* reset 'walked' bit for each dapm path */
795 static void dapm_clear_walk_output(struct snd_soc_dapm_context *dapm,
796 struct list_head *sink)
797 {
798 struct snd_soc_dapm_path *p;
799
800 list_for_each_entry(p, sink, list_source) {
801 if (p->walked) {
802 p->walked = 0;
803 dapm_clear_walk_output(dapm, &p->sink->sinks);
804 }
805 }
806 }
807
808 static void dapm_clear_walk_input(struct snd_soc_dapm_context *dapm,
809 struct list_head *source)
810 {
811 struct snd_soc_dapm_path *p;
812
813 list_for_each_entry(p, source, list_sink) {
814 if (p->walked) {
815 p->walked = 0;
816 dapm_clear_walk_input(dapm, &p->source->sources);
817 }
818 }
819 }
820
821
822 /* We implement power down on suspend by checking the power state of
823 * the ALSA card - when we are suspending the ALSA state for the card
824 * is set to D3.
825 */
826 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
827 {
828 int level = snd_power_get_state(widget->dapm->card->snd_card);
829
830 switch (level) {
831 case SNDRV_CTL_POWER_D3hot:
832 case SNDRV_CTL_POWER_D3cold:
833 if (widget->ignore_suspend)
834 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
835 widget->name);
836 return widget->ignore_suspend;
837 default:
838 return 1;
839 }
840 }
841
842 /* add widget to list if it's not already in the list */
843 static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list,
844 struct snd_soc_dapm_widget *w)
845 {
846 struct snd_soc_dapm_widget_list *wlist;
847 int wlistsize, wlistentries, i;
848
849 if (*list == NULL)
850 return -EINVAL;
851
852 wlist = *list;
853
854 /* is this widget already in the list */
855 for (i = 0; i < wlist->num_widgets; i++) {
856 if (wlist->widgets[i] == w)
857 return 0;
858 }
859
860 /* allocate some new space */
861 wlistentries = wlist->num_widgets + 1;
862 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
863 wlistentries * sizeof(struct snd_soc_dapm_widget *);
864 *list = krealloc(wlist, wlistsize, GFP_KERNEL);
865 if (*list == NULL) {
866 dev_err(w->dapm->dev, "ASoC: can't allocate widget list for %s\n",
867 w->name);
868 return -ENOMEM;
869 }
870 wlist = *list;
871
872 /* insert the widget */
873 dev_dbg(w->dapm->dev, "ASoC: added %s in widget list pos %d\n",
874 w->name, wlist->num_widgets);
875
876 wlist->widgets[wlist->num_widgets] = w;
877 wlist->num_widgets++;
878 return 1;
879 }
880
881 /*
882 * Recursively check for a completed path to an active or physically connected
883 * output widget. Returns number of complete paths.
884 */
885 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
886 struct snd_soc_dapm_widget_list **list)
887 {
888 struct snd_soc_dapm_path *path;
889 int con = 0;
890
891 if (widget->outputs >= 0)
892 return widget->outputs;
893
894 DAPM_UPDATE_STAT(widget, path_checks);
895
896 switch (widget->id) {
897 case snd_soc_dapm_supply:
898 case snd_soc_dapm_regulator_supply:
899 case snd_soc_dapm_clock_supply:
900 case snd_soc_dapm_kcontrol:
901 return 0;
902 default:
903 break;
904 }
905
906 switch (widget->id) {
907 case snd_soc_dapm_adc:
908 case snd_soc_dapm_aif_out:
909 case snd_soc_dapm_dai_out:
910 if (widget->active) {
911 widget->outputs = snd_soc_dapm_suspend_check(widget);
912 return widget->outputs;
913 }
914 default:
915 break;
916 }
917
918 if (widget->connected) {
919 /* connected pin ? */
920 if (widget->id == snd_soc_dapm_output && !widget->ext) {
921 widget->outputs = snd_soc_dapm_suspend_check(widget);
922 return widget->outputs;
923 }
924
925 /* connected jack or spk ? */
926 if (widget->id == snd_soc_dapm_hp ||
927 widget->id == snd_soc_dapm_spk ||
928 (widget->id == snd_soc_dapm_line &&
929 !list_empty(&widget->sources))) {
930 widget->outputs = snd_soc_dapm_suspend_check(widget);
931 return widget->outputs;
932 }
933 }
934
935 list_for_each_entry(path, &widget->sinks, list_source) {
936 DAPM_UPDATE_STAT(widget, neighbour_checks);
937
938 if (path->weak)
939 continue;
940
941 if (path->walking)
942 return 1;
943
944 if (path->walked)
945 continue;
946
947 trace_snd_soc_dapm_output_path(widget, path);
948
949 if (path->sink && path->connect) {
950 path->walked = 1;
951 path->walking = 1;
952
953 /* do we need to add this widget to the list ? */
954 if (list) {
955 int err;
956 err = dapm_list_add_widget(list, path->sink);
957 if (err < 0) {
958 dev_err(widget->dapm->dev,
959 "ASoC: could not add widget %s\n",
960 widget->name);
961 path->walking = 0;
962 return con;
963 }
964 }
965
966 con += is_connected_output_ep(path->sink, list);
967
968 path->walking = 0;
969 }
970 }
971
972 widget->outputs = con;
973
974 return con;
975 }
976
977 /*
978 * Recursively check for a completed path to an active or physically connected
979 * input widget. Returns number of complete paths.
980 */
981 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
982 struct snd_soc_dapm_widget_list **list)
983 {
984 struct snd_soc_dapm_path *path;
985 int con = 0;
986
987 if (widget->inputs >= 0)
988 return widget->inputs;
989
990 DAPM_UPDATE_STAT(widget, path_checks);
991
992 switch (widget->id) {
993 case snd_soc_dapm_supply:
994 case snd_soc_dapm_regulator_supply:
995 case snd_soc_dapm_clock_supply:
996 case snd_soc_dapm_kcontrol:
997 return 0;
998 default:
999 break;
1000 }
1001
1002 /* active stream ? */
1003 switch (widget->id) {
1004 case snd_soc_dapm_dac:
1005 case snd_soc_dapm_aif_in:
1006 case snd_soc_dapm_dai_in:
1007 if (widget->active) {
1008 widget->inputs = snd_soc_dapm_suspend_check(widget);
1009 return widget->inputs;
1010 }
1011 default:
1012 break;
1013 }
1014
1015 if (widget->connected) {
1016 /* connected pin ? */
1017 if (widget->id == snd_soc_dapm_input && !widget->ext) {
1018 widget->inputs = snd_soc_dapm_suspend_check(widget);
1019 return widget->inputs;
1020 }
1021
1022 /* connected VMID/Bias for lower pops */
1023 if (widget->id == snd_soc_dapm_vmid) {
1024 widget->inputs = snd_soc_dapm_suspend_check(widget);
1025 return widget->inputs;
1026 }
1027
1028 /* connected jack ? */
1029 if (widget->id == snd_soc_dapm_mic ||
1030 (widget->id == snd_soc_dapm_line &&
1031 !list_empty(&widget->sinks))) {
1032 widget->inputs = snd_soc_dapm_suspend_check(widget);
1033 return widget->inputs;
1034 }
1035
1036 /* signal generator */
1037 if (widget->id == snd_soc_dapm_siggen) {
1038 widget->inputs = snd_soc_dapm_suspend_check(widget);
1039 return widget->inputs;
1040 }
1041 }
1042
1043 list_for_each_entry(path, &widget->sources, list_sink) {
1044 DAPM_UPDATE_STAT(widget, neighbour_checks);
1045
1046 if (path->weak)
1047 continue;
1048
1049 if (path->walking)
1050 return 1;
1051
1052 if (path->walked)
1053 continue;
1054
1055 trace_snd_soc_dapm_input_path(widget, path);
1056
1057 if (path->source && path->connect) {
1058 path->walked = 1;
1059 path->walking = 1;
1060
1061 /* do we need to add this widget to the list ? */
1062 if (list) {
1063 int err;
1064 err = dapm_list_add_widget(list, path->source);
1065 if (err < 0) {
1066 dev_err(widget->dapm->dev,
1067 "ASoC: could not add widget %s\n",
1068 widget->name);
1069 path->walking = 0;
1070 return con;
1071 }
1072 }
1073
1074 con += is_connected_input_ep(path->source, list);
1075
1076 path->walking = 0;
1077 }
1078 }
1079
1080 widget->inputs = con;
1081
1082 return con;
1083 }
1084
1085 /**
1086 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1087 * @dai: the soc DAI.
1088 * @stream: stream direction.
1089 * @list: list of active widgets for this stream.
1090 *
1091 * Queries DAPM graph as to whether an valid audio stream path exists for
1092 * the initial stream specified by name. This takes into account
1093 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1094 *
1095 * Returns the number of valid paths or negative error.
1096 */
1097 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1098 struct snd_soc_dapm_widget_list **list)
1099 {
1100 struct snd_soc_card *card = dai->card;
1101 int paths;
1102
1103 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1104 dapm_reset(card);
1105
1106 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1107 paths = is_connected_output_ep(dai->playback_widget, list);
1108 dapm_clear_walk_output(&card->dapm,
1109 &dai->playback_widget->sinks);
1110 } else {
1111 paths = is_connected_input_ep(dai->capture_widget, list);
1112 dapm_clear_walk_input(&card->dapm,
1113 &dai->capture_widget->sources);
1114 }
1115
1116 trace_snd_soc_dapm_connected(paths, stream);
1117 mutex_unlock(&card->dapm_mutex);
1118
1119 return paths;
1120 }
1121
1122 /*
1123 * Handler for generic register modifier widget.
1124 */
1125 int dapm_reg_event(struct snd_soc_dapm_widget *w,
1126 struct snd_kcontrol *kcontrol, int event)
1127 {
1128 unsigned int val;
1129
1130 if (SND_SOC_DAPM_EVENT_ON(event))
1131 val = w->on_val;
1132 else
1133 val = w->off_val;
1134
1135 soc_widget_update_bits_locked(w, -(w->reg + 1),
1136 w->mask << w->shift, val << w->shift);
1137
1138 return 0;
1139 }
1140 EXPORT_SYMBOL_GPL(dapm_reg_event);
1141
1142 /*
1143 * Handler for regulator supply widget.
1144 */
1145 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1146 struct snd_kcontrol *kcontrol, int event)
1147 {
1148 int ret;
1149
1150 soc_dapm_async_complete(w->dapm);
1151
1152 if (SND_SOC_DAPM_EVENT_ON(event)) {
1153 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1154 ret = regulator_allow_bypass(w->regulator, false);
1155 if (ret != 0)
1156 dev_warn(w->dapm->dev,
1157 "ASoC: Failed to unbypass %s: %d\n",
1158 w->name, ret);
1159 }
1160
1161 return regulator_enable(w->regulator);
1162 } else {
1163 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1164 ret = regulator_allow_bypass(w->regulator, true);
1165 if (ret != 0)
1166 dev_warn(w->dapm->dev,
1167 "ASoC: Failed to bypass %s: %d\n",
1168 w->name, ret);
1169 }
1170
1171 return regulator_disable_deferred(w->regulator, w->shift);
1172 }
1173 }
1174 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1175
1176 /*
1177 * Handler for clock supply widget.
1178 */
1179 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1180 struct snd_kcontrol *kcontrol, int event)
1181 {
1182 if (!w->clk)
1183 return -EIO;
1184
1185 soc_dapm_async_complete(w->dapm);
1186
1187 #ifdef CONFIG_HAVE_CLK
1188 if (SND_SOC_DAPM_EVENT_ON(event)) {
1189 return clk_prepare_enable(w->clk);
1190 } else {
1191 clk_disable_unprepare(w->clk);
1192 return 0;
1193 }
1194 #endif
1195 return 0;
1196 }
1197 EXPORT_SYMBOL_GPL(dapm_clock_event);
1198
1199 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1200 {
1201 if (w->power_checked)
1202 return w->new_power;
1203
1204 if (w->force)
1205 w->new_power = 1;
1206 else
1207 w->new_power = w->power_check(w);
1208
1209 w->power_checked = true;
1210
1211 return w->new_power;
1212 }
1213
1214 /* Generic check to see if a widget should be powered.
1215 */
1216 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1217 {
1218 int in, out;
1219
1220 DAPM_UPDATE_STAT(w, power_checks);
1221
1222 in = is_connected_input_ep(w, NULL);
1223 dapm_clear_walk_input(w->dapm, &w->sources);
1224 out = is_connected_output_ep(w, NULL);
1225 dapm_clear_walk_output(w->dapm, &w->sinks);
1226 return out != 0 && in != 0;
1227 }
1228
1229 /* Check to see if an ADC has power */
1230 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
1231 {
1232 int in;
1233
1234 DAPM_UPDATE_STAT(w, power_checks);
1235
1236 if (w->active) {
1237 in = is_connected_input_ep(w, NULL);
1238 dapm_clear_walk_input(w->dapm, &w->sources);
1239 return in != 0;
1240 } else {
1241 return dapm_generic_check_power(w);
1242 }
1243 }
1244
1245 /* Check to see if a DAC has power */
1246 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
1247 {
1248 int out;
1249
1250 DAPM_UPDATE_STAT(w, power_checks);
1251
1252 if (w->active) {
1253 out = is_connected_output_ep(w, NULL);
1254 dapm_clear_walk_output(w->dapm, &w->sinks);
1255 return out != 0;
1256 } else {
1257 return dapm_generic_check_power(w);
1258 }
1259 }
1260
1261 /* Check to see if a power supply is needed */
1262 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1263 {
1264 struct snd_soc_dapm_path *path;
1265
1266 DAPM_UPDATE_STAT(w, power_checks);
1267
1268 /* Check if one of our outputs is connected */
1269 list_for_each_entry(path, &w->sinks, list_source) {
1270 DAPM_UPDATE_STAT(w, neighbour_checks);
1271
1272 if (path->weak)
1273 continue;
1274
1275 if (path->connected &&
1276 !path->connected(path->source, path->sink))
1277 continue;
1278
1279 if (!path->sink)
1280 continue;
1281
1282 if (dapm_widget_power_check(path->sink))
1283 return 1;
1284 }
1285
1286 return 0;
1287 }
1288
1289 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1290 {
1291 return 1;
1292 }
1293
1294 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1295 struct snd_soc_dapm_widget *b,
1296 bool power_up)
1297 {
1298 int *sort;
1299
1300 if (power_up)
1301 sort = dapm_up_seq;
1302 else
1303 sort = dapm_down_seq;
1304
1305 if (sort[a->id] != sort[b->id])
1306 return sort[a->id] - sort[b->id];
1307 if (a->subseq != b->subseq) {
1308 if (power_up)
1309 return a->subseq - b->subseq;
1310 else
1311 return b->subseq - a->subseq;
1312 }
1313 if (a->reg != b->reg)
1314 return a->reg - b->reg;
1315 if (a->dapm != b->dapm)
1316 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1317
1318 return 0;
1319 }
1320
1321 /* Insert a widget in order into a DAPM power sequence. */
1322 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1323 struct list_head *list,
1324 bool power_up)
1325 {
1326 struct snd_soc_dapm_widget *w;
1327
1328 list_for_each_entry(w, list, power_list)
1329 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1330 list_add_tail(&new_widget->power_list, &w->power_list);
1331 return;
1332 }
1333
1334 list_add_tail(&new_widget->power_list, list);
1335 }
1336
1337 static void dapm_seq_check_event(struct snd_soc_card *card,
1338 struct snd_soc_dapm_widget *w, int event)
1339 {
1340 const char *ev_name;
1341 int power, ret;
1342
1343 switch (event) {
1344 case SND_SOC_DAPM_PRE_PMU:
1345 ev_name = "PRE_PMU";
1346 power = 1;
1347 break;
1348 case SND_SOC_DAPM_POST_PMU:
1349 ev_name = "POST_PMU";
1350 power = 1;
1351 break;
1352 case SND_SOC_DAPM_PRE_PMD:
1353 ev_name = "PRE_PMD";
1354 power = 0;
1355 break;
1356 case SND_SOC_DAPM_POST_PMD:
1357 ev_name = "POST_PMD";
1358 power = 0;
1359 break;
1360 case SND_SOC_DAPM_WILL_PMU:
1361 ev_name = "WILL_PMU";
1362 power = 1;
1363 break;
1364 case SND_SOC_DAPM_WILL_PMD:
1365 ev_name = "WILL_PMD";
1366 power = 0;
1367 break;
1368 default:
1369 WARN(1, "Unknown event %d\n", event);
1370 return;
1371 }
1372
1373 if (w->new_power != power)
1374 return;
1375
1376 if (w->event && (w->event_flags & event)) {
1377 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1378 w->name, ev_name);
1379 soc_dapm_async_complete(w->dapm);
1380 trace_snd_soc_dapm_widget_event_start(w, event);
1381 ret = w->event(w, NULL, event);
1382 trace_snd_soc_dapm_widget_event_done(w, event);
1383 if (ret < 0)
1384 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1385 ev_name, w->name, ret);
1386 }
1387 }
1388
1389 /* Apply the coalesced changes from a DAPM sequence */
1390 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1391 struct list_head *pending)
1392 {
1393 struct snd_soc_dapm_widget *w;
1394 int reg;
1395 unsigned int value = 0;
1396 unsigned int mask = 0;
1397
1398 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1399 power_list)->reg;
1400
1401 list_for_each_entry(w, pending, power_list) {
1402 WARN_ON(reg != w->reg);
1403 w->power = w->new_power;
1404
1405 mask |= w->mask << w->shift;
1406 if (w->power)
1407 value |= w->on_val << w->shift;
1408 else
1409 value |= w->off_val << w->shift;
1410
1411 pop_dbg(w->dapm->dev, card->pop_time,
1412 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1413 w->name, reg, value, mask);
1414
1415 /* Check for events */
1416 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1417 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1418 }
1419
1420 if (reg >= 0) {
1421 /* Any widget will do, they should all be updating the
1422 * same register.
1423 */
1424 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1425 power_list);
1426
1427 pop_dbg(w->dapm->dev, card->pop_time,
1428 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1429 value, mask, reg, card->pop_time);
1430 pop_wait(card->pop_time);
1431 soc_widget_update_bits_locked(w, reg, mask, value);
1432 }
1433
1434 list_for_each_entry(w, pending, power_list) {
1435 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1436 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1437 }
1438 }
1439
1440 /* Apply a DAPM power sequence.
1441 *
1442 * We walk over a pre-sorted list of widgets to apply power to. In
1443 * order to minimise the number of writes to the device required
1444 * multiple widgets will be updated in a single write where possible.
1445 * Currently anything that requires more than a single write is not
1446 * handled.
1447 */
1448 static void dapm_seq_run(struct snd_soc_card *card,
1449 struct list_head *list, int event, bool power_up)
1450 {
1451 struct snd_soc_dapm_widget *w, *n;
1452 struct snd_soc_dapm_context *d;
1453 LIST_HEAD(pending);
1454 int cur_sort = -1;
1455 int cur_subseq = -1;
1456 int cur_reg = SND_SOC_NOPM;
1457 struct snd_soc_dapm_context *cur_dapm = NULL;
1458 int ret, i;
1459 int *sort;
1460
1461 if (power_up)
1462 sort = dapm_up_seq;
1463 else
1464 sort = dapm_down_seq;
1465
1466 list_for_each_entry_safe(w, n, list, power_list) {
1467 ret = 0;
1468
1469 /* Do we need to apply any queued changes? */
1470 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1471 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1472 if (!list_empty(&pending))
1473 dapm_seq_run_coalesced(card, &pending);
1474
1475 if (cur_dapm && cur_dapm->seq_notifier) {
1476 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1477 if (sort[i] == cur_sort)
1478 cur_dapm->seq_notifier(cur_dapm,
1479 i,
1480 cur_subseq);
1481 }
1482
1483 if (cur_dapm && w->dapm != cur_dapm)
1484 soc_dapm_async_complete(cur_dapm);
1485
1486 INIT_LIST_HEAD(&pending);
1487 cur_sort = -1;
1488 cur_subseq = INT_MIN;
1489 cur_reg = SND_SOC_NOPM;
1490 cur_dapm = NULL;
1491 }
1492
1493 switch (w->id) {
1494 case snd_soc_dapm_pre:
1495 if (!w->event)
1496 list_for_each_entry_safe_continue(w, n, list,
1497 power_list);
1498
1499 if (event == SND_SOC_DAPM_STREAM_START)
1500 ret = w->event(w,
1501 NULL, SND_SOC_DAPM_PRE_PMU);
1502 else if (event == SND_SOC_DAPM_STREAM_STOP)
1503 ret = w->event(w,
1504 NULL, SND_SOC_DAPM_PRE_PMD);
1505 break;
1506
1507 case snd_soc_dapm_post:
1508 if (!w->event)
1509 list_for_each_entry_safe_continue(w, n, list,
1510 power_list);
1511
1512 if (event == SND_SOC_DAPM_STREAM_START)
1513 ret = w->event(w,
1514 NULL, SND_SOC_DAPM_POST_PMU);
1515 else if (event == SND_SOC_DAPM_STREAM_STOP)
1516 ret = w->event(w,
1517 NULL, SND_SOC_DAPM_POST_PMD);
1518 break;
1519
1520 default:
1521 /* Queue it up for application */
1522 cur_sort = sort[w->id];
1523 cur_subseq = w->subseq;
1524 cur_reg = w->reg;
1525 cur_dapm = w->dapm;
1526 list_move(&w->power_list, &pending);
1527 break;
1528 }
1529
1530 if (ret < 0)
1531 dev_err(w->dapm->dev,
1532 "ASoC: Failed to apply widget power: %d\n", ret);
1533 }
1534
1535 if (!list_empty(&pending))
1536 dapm_seq_run_coalesced(card, &pending);
1537
1538 if (cur_dapm && cur_dapm->seq_notifier) {
1539 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1540 if (sort[i] == cur_sort)
1541 cur_dapm->seq_notifier(cur_dapm,
1542 i, cur_subseq);
1543 }
1544
1545 list_for_each_entry(d, &card->dapm_list, list) {
1546 soc_dapm_async_complete(d);
1547 }
1548 }
1549
1550 static void dapm_widget_update(struct snd_soc_card *card)
1551 {
1552 struct snd_soc_dapm_update *update = card->update;
1553 struct snd_soc_dapm_widget_list *wlist;
1554 struct snd_soc_dapm_widget *w = NULL;
1555 unsigned int wi;
1556 int ret;
1557
1558 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1559 return;
1560
1561 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1562
1563 for (wi = 0; wi < wlist->num_widgets; wi++) {
1564 w = wlist->widgets[wi];
1565
1566 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1567 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1568 if (ret != 0)
1569 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1570 w->name, ret);
1571 }
1572 }
1573
1574 if (!w)
1575 return;
1576
1577 ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
1578 update->val);
1579 if (ret < 0)
1580 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1581 w->name, ret);
1582
1583 for (wi = 0; wi < wlist->num_widgets; wi++) {
1584 w = wlist->widgets[wi];
1585
1586 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1587 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1588 if (ret != 0)
1589 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1590 w->name, ret);
1591 }
1592 }
1593 }
1594
1595 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1596 * they're changing state.
1597 */
1598 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1599 {
1600 struct snd_soc_dapm_context *d = data;
1601 int ret;
1602
1603 /* If we're off and we're not supposed to be go into STANDBY */
1604 if (d->bias_level == SND_SOC_BIAS_OFF &&
1605 d->target_bias_level != SND_SOC_BIAS_OFF) {
1606 if (d->dev)
1607 pm_runtime_get_sync(d->dev);
1608
1609 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1610 if (ret != 0)
1611 dev_err(d->dev,
1612 "ASoC: Failed to turn on bias: %d\n", ret);
1613 }
1614
1615 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1616 if (d->bias_level != d->target_bias_level) {
1617 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1618 if (ret != 0)
1619 dev_err(d->dev,
1620 "ASoC: Failed to prepare bias: %d\n", ret);
1621 }
1622 }
1623
1624 /* Async callback run prior to DAPM sequences - brings to their final
1625 * state.
1626 */
1627 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1628 {
1629 struct snd_soc_dapm_context *d = data;
1630 int ret;
1631
1632 /* If we just powered the last thing off drop to standby bias */
1633 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1634 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1635 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1636 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1637 if (ret != 0)
1638 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1639 ret);
1640 }
1641
1642 /* If we're in standby and can support bias off then do that */
1643 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1644 d->target_bias_level == SND_SOC_BIAS_OFF) {
1645 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1646 if (ret != 0)
1647 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1648 ret);
1649
1650 if (d->dev)
1651 pm_runtime_put(d->dev);
1652 }
1653
1654 /* If we just powered up then move to active bias */
1655 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1656 d->target_bias_level == SND_SOC_BIAS_ON) {
1657 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1658 if (ret != 0)
1659 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1660 ret);
1661 }
1662 }
1663
1664 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1665 bool power, bool connect)
1666 {
1667 /* If a connection is being made or broken then that update
1668 * will have marked the peer dirty, otherwise the widgets are
1669 * not connected and this update has no impact. */
1670 if (!connect)
1671 return;
1672
1673 /* If the peer is already in the state we're moving to then we
1674 * won't have an impact on it. */
1675 if (power != peer->power)
1676 dapm_mark_dirty(peer, "peer state change");
1677 }
1678
1679 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1680 struct list_head *up_list,
1681 struct list_head *down_list)
1682 {
1683 struct snd_soc_dapm_path *path;
1684
1685 if (w->power == power)
1686 return;
1687
1688 trace_snd_soc_dapm_widget_power(w, power);
1689
1690 /* If we changed our power state perhaps our neigbours changed
1691 * also.
1692 */
1693 list_for_each_entry(path, &w->sources, list_sink) {
1694 if (path->source) {
1695 dapm_widget_set_peer_power(path->source, power,
1696 path->connect);
1697 }
1698 }
1699 switch (w->id) {
1700 case snd_soc_dapm_supply:
1701 case snd_soc_dapm_regulator_supply:
1702 case snd_soc_dapm_clock_supply:
1703 case snd_soc_dapm_kcontrol:
1704 /* Supplies can't affect their outputs, only their inputs */
1705 break;
1706 default:
1707 list_for_each_entry(path, &w->sinks, list_source) {
1708 if (path->sink) {
1709 dapm_widget_set_peer_power(path->sink, power,
1710 path->connect);
1711 }
1712 }
1713 break;
1714 }
1715
1716 if (power)
1717 dapm_seq_insert(w, up_list, true);
1718 else
1719 dapm_seq_insert(w, down_list, false);
1720 }
1721
1722 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1723 struct list_head *up_list,
1724 struct list_head *down_list)
1725 {
1726 int power;
1727
1728 switch (w->id) {
1729 case snd_soc_dapm_pre:
1730 dapm_seq_insert(w, down_list, false);
1731 break;
1732 case snd_soc_dapm_post:
1733 dapm_seq_insert(w, up_list, true);
1734 break;
1735
1736 default:
1737 power = dapm_widget_power_check(w);
1738
1739 dapm_widget_set_power(w, power, up_list, down_list);
1740 break;
1741 }
1742 }
1743
1744 /*
1745 * Scan each dapm widget for complete audio path.
1746 * A complete path is a route that has valid endpoints i.e.:-
1747 *
1748 * o DAC to output pin.
1749 * o Input Pin to ADC.
1750 * o Input pin to Output pin (bypass, sidetone)
1751 * o DAC to ADC (loopback).
1752 */
1753 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1754 {
1755 struct snd_soc_dapm_widget *w;
1756 struct snd_soc_dapm_context *d;
1757 LIST_HEAD(up_list);
1758 LIST_HEAD(down_list);
1759 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1760 enum snd_soc_bias_level bias;
1761
1762 lockdep_assert_held(&card->dapm_mutex);
1763
1764 trace_snd_soc_dapm_start(card);
1765
1766 list_for_each_entry(d, &card->dapm_list, list) {
1767 if (d->idle_bias_off)
1768 d->target_bias_level = SND_SOC_BIAS_OFF;
1769 else
1770 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1771 }
1772
1773 dapm_reset(card);
1774
1775 /* Check which widgets we need to power and store them in
1776 * lists indicating if they should be powered up or down. We
1777 * only check widgets that have been flagged as dirty but note
1778 * that new widgets may be added to the dirty list while we
1779 * iterate.
1780 */
1781 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1782 dapm_power_one_widget(w, &up_list, &down_list);
1783 }
1784
1785 list_for_each_entry(w, &card->widgets, list) {
1786 switch (w->id) {
1787 case snd_soc_dapm_pre:
1788 case snd_soc_dapm_post:
1789 /* These widgets always need to be powered */
1790 break;
1791 default:
1792 list_del_init(&w->dirty);
1793 break;
1794 }
1795
1796 if (w->new_power) {
1797 d = w->dapm;
1798
1799 /* Supplies and micbiases only bring the
1800 * context up to STANDBY as unless something
1801 * else is active and passing audio they
1802 * generally don't require full power. Signal
1803 * generators are virtual pins and have no
1804 * power impact themselves.
1805 */
1806 switch (w->id) {
1807 case snd_soc_dapm_siggen:
1808 case snd_soc_dapm_vmid:
1809 break;
1810 case snd_soc_dapm_supply:
1811 case snd_soc_dapm_regulator_supply:
1812 case snd_soc_dapm_clock_supply:
1813 case snd_soc_dapm_micbias:
1814 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1815 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1816 break;
1817 default:
1818 d->target_bias_level = SND_SOC_BIAS_ON;
1819 break;
1820 }
1821 }
1822
1823 }
1824
1825 /* Force all contexts in the card to the same bias state if
1826 * they're not ground referenced.
1827 */
1828 bias = SND_SOC_BIAS_OFF;
1829 list_for_each_entry(d, &card->dapm_list, list)
1830 if (d->target_bias_level > bias)
1831 bias = d->target_bias_level;
1832 list_for_each_entry(d, &card->dapm_list, list)
1833 if (!d->idle_bias_off)
1834 d->target_bias_level = bias;
1835
1836 trace_snd_soc_dapm_walk_done(card);
1837
1838 /* Run card bias changes at first */
1839 dapm_pre_sequence_async(&card->dapm, 0);
1840 /* Run other bias changes in parallel */
1841 list_for_each_entry(d, &card->dapm_list, list) {
1842 if (d != &card->dapm)
1843 async_schedule_domain(dapm_pre_sequence_async, d,
1844 &async_domain);
1845 }
1846 async_synchronize_full_domain(&async_domain);
1847
1848 list_for_each_entry(w, &down_list, power_list) {
1849 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
1850 }
1851
1852 list_for_each_entry(w, &up_list, power_list) {
1853 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
1854 }
1855
1856 /* Power down widgets first; try to avoid amplifying pops. */
1857 dapm_seq_run(card, &down_list, event, false);
1858
1859 dapm_widget_update(card);
1860
1861 /* Now power up. */
1862 dapm_seq_run(card, &up_list, event, true);
1863
1864 /* Run all the bias changes in parallel */
1865 list_for_each_entry(d, &card->dapm_list, list) {
1866 if (d != &card->dapm)
1867 async_schedule_domain(dapm_post_sequence_async, d,
1868 &async_domain);
1869 }
1870 async_synchronize_full_domain(&async_domain);
1871 /* Run card bias changes at last */
1872 dapm_post_sequence_async(&card->dapm, 0);
1873
1874 /* do we need to notify any clients that DAPM event is complete */
1875 list_for_each_entry(d, &card->dapm_list, list) {
1876 if (d->stream_event)
1877 d->stream_event(d, event);
1878 }
1879
1880 pop_dbg(card->dev, card->pop_time,
1881 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1882 pop_wait(card->pop_time);
1883
1884 trace_snd_soc_dapm_done(card);
1885
1886 return 0;
1887 }
1888
1889 #ifdef CONFIG_DEBUG_FS
1890 static ssize_t dapm_widget_power_read_file(struct file *file,
1891 char __user *user_buf,
1892 size_t count, loff_t *ppos)
1893 {
1894 struct snd_soc_dapm_widget *w = file->private_data;
1895 char *buf;
1896 int in, out;
1897 ssize_t ret;
1898 struct snd_soc_dapm_path *p = NULL;
1899
1900 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1901 if (!buf)
1902 return -ENOMEM;
1903
1904 in = is_connected_input_ep(w, NULL);
1905 dapm_clear_walk_input(w->dapm, &w->sources);
1906 out = is_connected_output_ep(w, NULL);
1907 dapm_clear_walk_output(w->dapm, &w->sinks);
1908
1909 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1910 w->name, w->power ? "On" : "Off",
1911 w->force ? " (forced)" : "", in, out);
1912
1913 if (w->reg >= 0)
1914 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1915 " - R%d(0x%x) mask 0x%x",
1916 w->reg, w->reg, w->mask << w->shift);
1917
1918 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1919
1920 if (w->sname)
1921 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1922 w->sname,
1923 w->active ? "active" : "inactive");
1924
1925 list_for_each_entry(p, &w->sources, list_sink) {
1926 if (p->connected && !p->connected(w, p->source))
1927 continue;
1928
1929 if (p->connect)
1930 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1931 " in \"%s\" \"%s\"\n",
1932 p->name ? p->name : "static",
1933 p->source->name);
1934 }
1935 list_for_each_entry(p, &w->sinks, list_source) {
1936 if (p->connected && !p->connected(w, p->sink))
1937 continue;
1938
1939 if (p->connect)
1940 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1941 " out \"%s\" \"%s\"\n",
1942 p->name ? p->name : "static",
1943 p->sink->name);
1944 }
1945
1946 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1947
1948 kfree(buf);
1949 return ret;
1950 }
1951
1952 static const struct file_operations dapm_widget_power_fops = {
1953 .open = simple_open,
1954 .read = dapm_widget_power_read_file,
1955 .llseek = default_llseek,
1956 };
1957
1958 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1959 size_t count, loff_t *ppos)
1960 {
1961 struct snd_soc_dapm_context *dapm = file->private_data;
1962 char *level;
1963
1964 switch (dapm->bias_level) {
1965 case SND_SOC_BIAS_ON:
1966 level = "On\n";
1967 break;
1968 case SND_SOC_BIAS_PREPARE:
1969 level = "Prepare\n";
1970 break;
1971 case SND_SOC_BIAS_STANDBY:
1972 level = "Standby\n";
1973 break;
1974 case SND_SOC_BIAS_OFF:
1975 level = "Off\n";
1976 break;
1977 default:
1978 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
1979 level = "Unknown\n";
1980 break;
1981 }
1982
1983 return simple_read_from_buffer(user_buf, count, ppos, level,
1984 strlen(level));
1985 }
1986
1987 static const struct file_operations dapm_bias_fops = {
1988 .open = simple_open,
1989 .read = dapm_bias_read_file,
1990 .llseek = default_llseek,
1991 };
1992
1993 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1994 struct dentry *parent)
1995 {
1996 struct dentry *d;
1997
1998 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1999
2000 if (!dapm->debugfs_dapm) {
2001 dev_warn(dapm->dev,
2002 "ASoC: Failed to create DAPM debugfs directory\n");
2003 return;
2004 }
2005
2006 d = debugfs_create_file("bias_level", 0444,
2007 dapm->debugfs_dapm, dapm,
2008 &dapm_bias_fops);
2009 if (!d)
2010 dev_warn(dapm->dev,
2011 "ASoC: Failed to create bias level debugfs file\n");
2012 }
2013
2014 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2015 {
2016 struct snd_soc_dapm_context *dapm = w->dapm;
2017 struct dentry *d;
2018
2019 if (!dapm->debugfs_dapm || !w->name)
2020 return;
2021
2022 d = debugfs_create_file(w->name, 0444,
2023 dapm->debugfs_dapm, w,
2024 &dapm_widget_power_fops);
2025 if (!d)
2026 dev_warn(w->dapm->dev,
2027 "ASoC: Failed to create %s debugfs file\n",
2028 w->name);
2029 }
2030
2031 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2032 {
2033 debugfs_remove_recursive(dapm->debugfs_dapm);
2034 }
2035
2036 #else
2037 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2038 struct dentry *parent)
2039 {
2040 }
2041
2042 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2043 {
2044 }
2045
2046 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2047 {
2048 }
2049
2050 #endif
2051
2052 /* test and update the power status of a mux widget */
2053 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2054 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2055 {
2056 struct snd_soc_dapm_path *path;
2057 int found = 0;
2058
2059 lockdep_assert_held(&card->dapm_mutex);
2060
2061 /* find dapm widget path assoc with kcontrol */
2062 dapm_kcontrol_for_each_path(path, kcontrol) {
2063 if (!path->name || !e->texts[mux])
2064 continue;
2065
2066 found = 1;
2067 /* we now need to match the string in the enum to the path */
2068 if (!(strcmp(path->name, e->texts[mux]))) {
2069 path->connect = 1; /* new connection */
2070 dapm_mark_dirty(path->source, "mux connection");
2071 } else {
2072 if (path->connect)
2073 dapm_mark_dirty(path->source,
2074 "mux disconnection");
2075 path->connect = 0; /* old connection must be powered down */
2076 }
2077 dapm_mark_dirty(path->sink, "mux change");
2078 }
2079
2080 if (found)
2081 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2082
2083 return found;
2084 }
2085
2086 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2087 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2088 struct snd_soc_dapm_update *update)
2089 {
2090 struct snd_soc_card *card = dapm->card;
2091 int ret;
2092
2093 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2094 card->update = update;
2095 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2096 card->update = NULL;
2097 mutex_unlock(&card->dapm_mutex);
2098 if (ret > 0)
2099 soc_dpcm_runtime_update(card);
2100 return ret;
2101 }
2102 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2103
2104 /* test and update the power status of a mixer or switch widget */
2105 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2106 struct snd_kcontrol *kcontrol, int connect)
2107 {
2108 struct snd_soc_dapm_path *path;
2109 int found = 0;
2110
2111 lockdep_assert_held(&card->dapm_mutex);
2112
2113 /* find dapm widget path assoc with kcontrol */
2114 dapm_kcontrol_for_each_path(path, kcontrol) {
2115 found = 1;
2116 path->connect = connect;
2117 dapm_mark_dirty(path->source, "mixer connection");
2118 dapm_mark_dirty(path->sink, "mixer update");
2119 }
2120
2121 if (found)
2122 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2123
2124 return found;
2125 }
2126
2127 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2128 struct snd_kcontrol *kcontrol, int connect,
2129 struct snd_soc_dapm_update *update)
2130 {
2131 struct snd_soc_card *card = dapm->card;
2132 int ret;
2133
2134 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2135 card->update = update;
2136 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2137 card->update = NULL;
2138 mutex_unlock(&card->dapm_mutex);
2139 if (ret > 0)
2140 soc_dpcm_runtime_update(card);
2141 return ret;
2142 }
2143 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2144
2145 /* show dapm widget status in sys fs */
2146 static ssize_t dapm_widget_show(struct device *dev,
2147 struct device_attribute *attr, char *buf)
2148 {
2149 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2150 struct snd_soc_codec *codec =rtd->codec;
2151 struct snd_soc_dapm_widget *w;
2152 int count = 0;
2153 char *state = "not set";
2154
2155 list_for_each_entry(w, &codec->card->widgets, list) {
2156 if (w->dapm != &codec->dapm)
2157 continue;
2158
2159 /* only display widgets that burnm power */
2160 switch (w->id) {
2161 case snd_soc_dapm_hp:
2162 case snd_soc_dapm_mic:
2163 case snd_soc_dapm_spk:
2164 case snd_soc_dapm_line:
2165 case snd_soc_dapm_micbias:
2166 case snd_soc_dapm_dac:
2167 case snd_soc_dapm_adc:
2168 case snd_soc_dapm_pga:
2169 case snd_soc_dapm_out_drv:
2170 case snd_soc_dapm_mixer:
2171 case snd_soc_dapm_mixer_named_ctl:
2172 case snd_soc_dapm_supply:
2173 case snd_soc_dapm_regulator_supply:
2174 case snd_soc_dapm_clock_supply:
2175 if (w->name)
2176 count += sprintf(buf + count, "%s: %s\n",
2177 w->name, w->power ? "On":"Off");
2178 break;
2179 default:
2180 break;
2181 }
2182 }
2183
2184 switch (codec->dapm.bias_level) {
2185 case SND_SOC_BIAS_ON:
2186 state = "On";
2187 break;
2188 case SND_SOC_BIAS_PREPARE:
2189 state = "Prepare";
2190 break;
2191 case SND_SOC_BIAS_STANDBY:
2192 state = "Standby";
2193 break;
2194 case SND_SOC_BIAS_OFF:
2195 state = "Off";
2196 break;
2197 }
2198 count += sprintf(buf + count, "PM State: %s\n", state);
2199
2200 return count;
2201 }
2202
2203 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2204
2205 int snd_soc_dapm_sys_add(struct device *dev)
2206 {
2207 return device_create_file(dev, &dev_attr_dapm_widget);
2208 }
2209
2210 static void snd_soc_dapm_sys_remove(struct device *dev)
2211 {
2212 device_remove_file(dev, &dev_attr_dapm_widget);
2213 }
2214
2215 static void dapm_free_path(struct snd_soc_dapm_path *path)
2216 {
2217 list_del(&path->list_sink);
2218 list_del(&path->list_source);
2219 list_del(&path->list_kcontrol);
2220 list_del(&path->list);
2221 kfree(path);
2222 }
2223
2224 /* free all dapm widgets and resources */
2225 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2226 {
2227 struct snd_soc_dapm_widget *w, *next_w;
2228 struct snd_soc_dapm_path *p, *next_p;
2229
2230 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2231 if (w->dapm != dapm)
2232 continue;
2233 list_del(&w->list);
2234 /*
2235 * remove source and sink paths associated to this widget.
2236 * While removing the path, remove reference to it from both
2237 * source and sink widgets so that path is removed only once.
2238 */
2239 list_for_each_entry_safe(p, next_p, &w->sources, list_sink)
2240 dapm_free_path(p);
2241
2242 list_for_each_entry_safe(p, next_p, &w->sinks, list_source)
2243 dapm_free_path(p);
2244
2245 kfree(w->kcontrols);
2246 kfree(w->name);
2247 kfree(w);
2248 }
2249 }
2250
2251 static struct snd_soc_dapm_widget *dapm_find_widget(
2252 struct snd_soc_dapm_context *dapm, const char *pin,
2253 bool search_other_contexts)
2254 {
2255 struct snd_soc_dapm_widget *w;
2256 struct snd_soc_dapm_widget *fallback = NULL;
2257
2258 list_for_each_entry(w, &dapm->card->widgets, list) {
2259 if (!strcmp(w->name, pin)) {
2260 if (w->dapm == dapm)
2261 return w;
2262 else
2263 fallback = w;
2264 }
2265 }
2266
2267 if (search_other_contexts)
2268 return fallback;
2269
2270 return NULL;
2271 }
2272
2273 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2274 const char *pin, int status)
2275 {
2276 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2277
2278 dapm_assert_locked(dapm);
2279
2280 if (!w) {
2281 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2282 return -EINVAL;
2283 }
2284
2285 if (w->connected != status)
2286 dapm_mark_dirty(w, "pin configuration");
2287
2288 w->connected = status;
2289 if (status == 0)
2290 w->force = 0;
2291
2292 return 0;
2293 }
2294
2295 /**
2296 * snd_soc_dapm_sync_unlocked - scan and power dapm paths
2297 * @dapm: DAPM context
2298 *
2299 * Walks all dapm audio paths and powers widgets according to their
2300 * stream or path usage.
2301 *
2302 * Requires external locking.
2303 *
2304 * Returns 0 for success.
2305 */
2306 int snd_soc_dapm_sync_unlocked(struct snd_soc_dapm_context *dapm)
2307 {
2308 /*
2309 * Suppress early reports (eg, jacks syncing their state) to avoid
2310 * silly DAPM runs during card startup.
2311 */
2312 if (!dapm->card || !dapm->card->instantiated)
2313 return 0;
2314
2315 return dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2316 }
2317 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_unlocked);
2318
2319 /**
2320 * snd_soc_dapm_sync - scan and power dapm paths
2321 * @dapm: DAPM context
2322 *
2323 * Walks all dapm audio paths and powers widgets according to their
2324 * stream or path usage.
2325 *
2326 * Returns 0 for success.
2327 */
2328 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2329 {
2330 int ret;
2331
2332 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2333 ret = snd_soc_dapm_sync_unlocked(dapm);
2334 mutex_unlock(&dapm->card->dapm_mutex);
2335 return ret;
2336 }
2337 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2338
2339 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2340 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2341 const char *control,
2342 int (*connected)(struct snd_soc_dapm_widget *source,
2343 struct snd_soc_dapm_widget *sink))
2344 {
2345 struct snd_soc_dapm_path *path;
2346 int ret;
2347
2348 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2349 if (!path)
2350 return -ENOMEM;
2351
2352 path->source = wsource;
2353 path->sink = wsink;
2354 path->connected = connected;
2355 INIT_LIST_HEAD(&path->list);
2356 INIT_LIST_HEAD(&path->list_kcontrol);
2357 INIT_LIST_HEAD(&path->list_source);
2358 INIT_LIST_HEAD(&path->list_sink);
2359
2360 /* check for external widgets */
2361 if (wsink->id == snd_soc_dapm_input) {
2362 if (wsource->id == snd_soc_dapm_micbias ||
2363 wsource->id == snd_soc_dapm_mic ||
2364 wsource->id == snd_soc_dapm_line ||
2365 wsource->id == snd_soc_dapm_output)
2366 wsink->ext = 1;
2367 }
2368 if (wsource->id == snd_soc_dapm_output) {
2369 if (wsink->id == snd_soc_dapm_spk ||
2370 wsink->id == snd_soc_dapm_hp ||
2371 wsink->id == snd_soc_dapm_line ||
2372 wsink->id == snd_soc_dapm_input)
2373 wsource->ext = 1;
2374 }
2375
2376 dapm_mark_dirty(wsource, "Route added");
2377 dapm_mark_dirty(wsink, "Route added");
2378
2379 /* connect static paths */
2380 if (control == NULL) {
2381 list_add(&path->list, &dapm->card->paths);
2382 list_add(&path->list_sink, &wsink->sources);
2383 list_add(&path->list_source, &wsource->sinks);
2384 path->connect = 1;
2385 return 0;
2386 }
2387
2388 /* connect dynamic paths */
2389 switch (wsink->id) {
2390 case snd_soc_dapm_adc:
2391 case snd_soc_dapm_dac:
2392 case snd_soc_dapm_pga:
2393 case snd_soc_dapm_out_drv:
2394 case snd_soc_dapm_input:
2395 case snd_soc_dapm_output:
2396 case snd_soc_dapm_siggen:
2397 case snd_soc_dapm_micbias:
2398 case snd_soc_dapm_vmid:
2399 case snd_soc_dapm_pre:
2400 case snd_soc_dapm_post:
2401 case snd_soc_dapm_supply:
2402 case snd_soc_dapm_regulator_supply:
2403 case snd_soc_dapm_clock_supply:
2404 case snd_soc_dapm_aif_in:
2405 case snd_soc_dapm_aif_out:
2406 case snd_soc_dapm_dai_in:
2407 case snd_soc_dapm_dai_out:
2408 case snd_soc_dapm_dai_link:
2409 case snd_soc_dapm_kcontrol:
2410 list_add(&path->list, &dapm->card->paths);
2411 list_add(&path->list_sink, &wsink->sources);
2412 list_add(&path->list_source, &wsource->sinks);
2413 path->connect = 1;
2414 return 0;
2415 case snd_soc_dapm_mux:
2416 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2417 &wsink->kcontrol_news[0]);
2418 if (ret != 0)
2419 goto err;
2420 break;
2421 case snd_soc_dapm_switch:
2422 case snd_soc_dapm_mixer:
2423 case snd_soc_dapm_mixer_named_ctl:
2424 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2425 if (ret != 0)
2426 goto err;
2427 break;
2428 case snd_soc_dapm_hp:
2429 case snd_soc_dapm_mic:
2430 case snd_soc_dapm_line:
2431 case snd_soc_dapm_spk:
2432 list_add(&path->list, &dapm->card->paths);
2433 list_add(&path->list_sink, &wsink->sources);
2434 list_add(&path->list_source, &wsource->sinks);
2435 path->connect = 0;
2436 return 0;
2437 }
2438
2439 return 0;
2440 err:
2441 kfree(path);
2442 return ret;
2443 }
2444
2445 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2446 const struct snd_soc_dapm_route *route,
2447 unsigned int is_prefixed)
2448 {
2449 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2450 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2451 const char *sink;
2452 const char *source;
2453 char prefixed_sink[80];
2454 char prefixed_source[80];
2455 int ret;
2456
2457 if (dapm->codec && dapm->codec->name_prefix && !is_prefixed) {
2458 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2459 dapm->codec->name_prefix, route->sink);
2460 sink = prefixed_sink;
2461 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2462 dapm->codec->name_prefix, route->source);
2463 source = prefixed_source;
2464 } else {
2465 sink = route->sink;
2466 source = route->source;
2467 }
2468
2469 /*
2470 * find src and dest widgets over all widgets but favor a widget from
2471 * current DAPM context
2472 */
2473 list_for_each_entry(w, &dapm->card->widgets, list) {
2474 if (!wsink && !(strcmp(w->name, sink))) {
2475 wtsink = w;
2476 if (w->dapm == dapm)
2477 wsink = w;
2478 continue;
2479 }
2480 if (!wsource && !(strcmp(w->name, source))) {
2481 wtsource = w;
2482 if (w->dapm == dapm)
2483 wsource = w;
2484 }
2485 }
2486 /* use widget from another DAPM context if not found from this */
2487 if (!wsink)
2488 wsink = wtsink;
2489 if (!wsource)
2490 wsource = wtsource;
2491
2492 if (wsource == NULL) {
2493 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2494 route->source);
2495 return -ENODEV;
2496 }
2497 if (wsink == NULL) {
2498 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2499 route->sink);
2500 return -ENODEV;
2501 }
2502
2503 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2504 route->connected);
2505 if (ret)
2506 goto err;
2507
2508 return 0;
2509 err:
2510 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2511 source, route->control, sink);
2512 return ret;
2513 }
2514
2515 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2516 const struct snd_soc_dapm_route *route)
2517 {
2518 struct snd_soc_dapm_path *path, *p;
2519 const char *sink;
2520 const char *source;
2521 char prefixed_sink[80];
2522 char prefixed_source[80];
2523
2524 if (route->control) {
2525 dev_err(dapm->dev,
2526 "ASoC: Removal of routes with controls not supported\n");
2527 return -EINVAL;
2528 }
2529
2530 if (dapm->codec && dapm->codec->name_prefix) {
2531 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2532 dapm->codec->name_prefix, route->sink);
2533 sink = prefixed_sink;
2534 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2535 dapm->codec->name_prefix, route->source);
2536 source = prefixed_source;
2537 } else {
2538 sink = route->sink;
2539 source = route->source;
2540 }
2541
2542 path = NULL;
2543 list_for_each_entry(p, &dapm->card->paths, list) {
2544 if (strcmp(p->source->name, source) != 0)
2545 continue;
2546 if (strcmp(p->sink->name, sink) != 0)
2547 continue;
2548 path = p;
2549 break;
2550 }
2551
2552 if (path) {
2553 dapm_mark_dirty(path->source, "Route removed");
2554 dapm_mark_dirty(path->sink, "Route removed");
2555
2556 dapm_free_path(path);
2557 } else {
2558 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2559 source, sink);
2560 }
2561
2562 return 0;
2563 }
2564
2565 /**
2566 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2567 * @dapm: DAPM context
2568 * @route: audio routes
2569 * @num: number of routes
2570 *
2571 * Connects 2 dapm widgets together via a named audio path. The sink is
2572 * the widget receiving the audio signal, whilst the source is the sender
2573 * of the audio signal.
2574 *
2575 * Returns 0 for success else error. On error all resources can be freed
2576 * with a call to snd_soc_card_free().
2577 */
2578 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2579 const struct snd_soc_dapm_route *route, int num)
2580 {
2581 int i, r, ret = 0;
2582
2583 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2584 for (i = 0; i < num; i++) {
2585 r = snd_soc_dapm_add_route(dapm, route, false);
2586 if (r < 0) {
2587 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2588 route->source,
2589 route->control ? route->control : "direct",
2590 route->sink);
2591 ret = r;
2592 }
2593 route++;
2594 }
2595 mutex_unlock(&dapm->card->dapm_mutex);
2596
2597 return ret;
2598 }
2599 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2600
2601 /**
2602 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2603 * @dapm: DAPM context
2604 * @route: audio routes
2605 * @num: number of routes
2606 *
2607 * Removes routes from the DAPM context.
2608 */
2609 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2610 const struct snd_soc_dapm_route *route, int num)
2611 {
2612 int i, ret = 0;
2613
2614 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2615 for (i = 0; i < num; i++) {
2616 snd_soc_dapm_del_route(dapm, route);
2617 route++;
2618 }
2619 mutex_unlock(&dapm->card->dapm_mutex);
2620
2621 return ret;
2622 }
2623 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2624
2625 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2626 const struct snd_soc_dapm_route *route)
2627 {
2628 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2629 route->source,
2630 true);
2631 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2632 route->sink,
2633 true);
2634 struct snd_soc_dapm_path *path;
2635 int count = 0;
2636
2637 if (!source) {
2638 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2639 route->source);
2640 return -ENODEV;
2641 }
2642
2643 if (!sink) {
2644 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2645 route->sink);
2646 return -ENODEV;
2647 }
2648
2649 if (route->control || route->connected)
2650 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2651 route->source, route->sink);
2652
2653 list_for_each_entry(path, &source->sinks, list_source) {
2654 if (path->sink == sink) {
2655 path->weak = 1;
2656 count++;
2657 }
2658 }
2659
2660 if (count == 0)
2661 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2662 route->source, route->sink);
2663 if (count > 1)
2664 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2665 count, route->source, route->sink);
2666
2667 return 0;
2668 }
2669
2670 /**
2671 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2672 * @dapm: DAPM context
2673 * @route: audio routes
2674 * @num: number of routes
2675 *
2676 * Mark existing routes matching those specified in the passed array
2677 * as being weak, meaning that they are ignored for the purpose of
2678 * power decisions. The main intended use case is for sidetone paths
2679 * which couple audio between other independent paths if they are both
2680 * active in order to make the combination work better at the user
2681 * level but which aren't intended to be "used".
2682 *
2683 * Note that CODEC drivers should not use this as sidetone type paths
2684 * can frequently also be used as bypass paths.
2685 */
2686 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2687 const struct snd_soc_dapm_route *route, int num)
2688 {
2689 int i, err;
2690 int ret = 0;
2691
2692 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2693 for (i = 0; i < num; i++) {
2694 err = snd_soc_dapm_weak_route(dapm, route);
2695 if (err)
2696 ret = err;
2697 route++;
2698 }
2699 mutex_unlock(&dapm->card->dapm_mutex);
2700
2701 return ret;
2702 }
2703 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2704
2705 /**
2706 * snd_soc_dapm_new_widgets - add new dapm widgets
2707 * @dapm: DAPM context
2708 *
2709 * Checks the codec for any new dapm widgets and creates them if found.
2710 *
2711 * Returns 0 for success.
2712 */
2713 int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
2714 {
2715 struct snd_soc_dapm_widget *w;
2716 unsigned int val;
2717
2718 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2719
2720 list_for_each_entry(w, &card->widgets, list)
2721 {
2722 if (w->new)
2723 continue;
2724
2725 if (w->num_kcontrols) {
2726 w->kcontrols = kzalloc(w->num_kcontrols *
2727 sizeof(struct snd_kcontrol *),
2728 GFP_KERNEL);
2729 if (!w->kcontrols) {
2730 mutex_unlock(&card->dapm_mutex);
2731 return -ENOMEM;
2732 }
2733 }
2734
2735 switch(w->id) {
2736 case snd_soc_dapm_switch:
2737 case snd_soc_dapm_mixer:
2738 case snd_soc_dapm_mixer_named_ctl:
2739 dapm_new_mixer(w);
2740 break;
2741 case snd_soc_dapm_mux:
2742 dapm_new_mux(w);
2743 break;
2744 case snd_soc_dapm_pga:
2745 case snd_soc_dapm_out_drv:
2746 dapm_new_pga(w);
2747 break;
2748 default:
2749 break;
2750 }
2751
2752 /* Read the initial power state from the device */
2753 if (w->reg >= 0) {
2754 soc_widget_read(w, w->reg, &val);
2755 val = val >> w->shift;
2756 val &= w->mask;
2757 if (val == w->on_val)
2758 w->power = 1;
2759 }
2760
2761 w->new = 1;
2762
2763 dapm_mark_dirty(w, "new widget");
2764 dapm_debugfs_add_widget(w);
2765 }
2766
2767 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2768 mutex_unlock(&card->dapm_mutex);
2769 return 0;
2770 }
2771 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2772
2773 /**
2774 * snd_soc_dapm_get_volsw - dapm mixer get callback
2775 * @kcontrol: mixer control
2776 * @ucontrol: control element information
2777 *
2778 * Callback to get the value of a dapm mixer control.
2779 *
2780 * Returns 0 for success.
2781 */
2782 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2783 struct snd_ctl_elem_value *ucontrol)
2784 {
2785 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2786 struct snd_soc_card *card = codec->card;
2787 struct soc_mixer_control *mc =
2788 (struct soc_mixer_control *)kcontrol->private_value;
2789 int reg = mc->reg;
2790 unsigned int shift = mc->shift;
2791 int max = mc->max;
2792 unsigned int mask = (1 << fls(max)) - 1;
2793 unsigned int invert = mc->invert;
2794 unsigned int val;
2795
2796 if (snd_soc_volsw_is_stereo(mc))
2797 dev_warn(codec->dapm.dev,
2798 "ASoC: Control '%s' is stereo, which is not supported\n",
2799 kcontrol->id.name);
2800
2801 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2802 if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM)
2803 val = (snd_soc_read(codec, reg) >> shift) & mask;
2804 else
2805 val = dapm_kcontrol_get_value(kcontrol);
2806 mutex_unlock(&card->dapm_mutex);
2807
2808 if (invert)
2809 ucontrol->value.integer.value[0] = max - val;
2810 else
2811 ucontrol->value.integer.value[0] = val;
2812
2813 return 0;
2814 }
2815 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2816
2817 /**
2818 * snd_soc_dapm_put_volsw - dapm mixer set callback
2819 * @kcontrol: mixer control
2820 * @ucontrol: control element information
2821 *
2822 * Callback to set the value of a dapm mixer control.
2823 *
2824 * Returns 0 for success.
2825 */
2826 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2827 struct snd_ctl_elem_value *ucontrol)
2828 {
2829 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2830 struct snd_soc_card *card = codec->card;
2831 struct soc_mixer_control *mc =
2832 (struct soc_mixer_control *)kcontrol->private_value;
2833 int reg = mc->reg;
2834 unsigned int shift = mc->shift;
2835 int max = mc->max;
2836 unsigned int mask = (1 << fls(max)) - 1;
2837 unsigned int invert = mc->invert;
2838 unsigned int val;
2839 int connect, change;
2840 struct snd_soc_dapm_update update;
2841 int ret = 0;
2842
2843 if (snd_soc_volsw_is_stereo(mc))
2844 dev_warn(codec->dapm.dev,
2845 "ASoC: Control '%s' is stereo, which is not supported\n",
2846 kcontrol->id.name);
2847
2848 val = (ucontrol->value.integer.value[0] & mask);
2849 connect = !!val;
2850
2851 if (invert)
2852 val = max - val;
2853
2854 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2855
2856 change = dapm_kcontrol_set_value(kcontrol, val);
2857
2858 if (reg != SND_SOC_NOPM) {
2859 mask = mask << shift;
2860 val = val << shift;
2861
2862 change = snd_soc_test_bits(codec, reg, mask, val);
2863 }
2864
2865 if (change) {
2866 if (reg != SND_SOC_NOPM) {
2867 update.kcontrol = kcontrol;
2868 update.reg = reg;
2869 update.mask = mask;
2870 update.val = val;
2871
2872 card->update = &update;
2873 }
2874
2875 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2876
2877 card->update = NULL;
2878 }
2879
2880 mutex_unlock(&card->dapm_mutex);
2881
2882 if (ret > 0)
2883 soc_dpcm_runtime_update(card);
2884
2885 return change;
2886 }
2887 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2888
2889 /**
2890 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2891 * @kcontrol: mixer control
2892 * @ucontrol: control element information
2893 *
2894 * Callback to get the value of a dapm enumerated double mixer control.
2895 *
2896 * Returns 0 for success.
2897 */
2898 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2899 struct snd_ctl_elem_value *ucontrol)
2900 {
2901 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2902 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2903 unsigned int reg_val, val;
2904
2905 if (e->reg != SND_SOC_NOPM)
2906 reg_val = snd_soc_read(codec, e->reg);
2907 else
2908 reg_val = dapm_kcontrol_get_value(kcontrol);
2909
2910 val = (reg_val >> e->shift_l) & e->mask;
2911 ucontrol->value.enumerated.item[0] = snd_soc_enum_val_to_item(e, val);
2912 if (e->shift_l != e->shift_r) {
2913 val = (reg_val >> e->shift_r) & e->mask;
2914 val = snd_soc_enum_val_to_item(e, val);
2915 ucontrol->value.enumerated.item[1] = val;
2916 }
2917
2918 return 0;
2919 }
2920 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2921
2922 /**
2923 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2924 * @kcontrol: mixer control
2925 * @ucontrol: control element information
2926 *
2927 * Callback to set the value of a dapm enumerated double mixer control.
2928 *
2929 * Returns 0 for success.
2930 */
2931 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2932 struct snd_ctl_elem_value *ucontrol)
2933 {
2934 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2935 struct snd_soc_card *card = codec->card;
2936 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2937 unsigned int *item = ucontrol->value.enumerated.item;
2938 unsigned int val, change;
2939 unsigned int mask;
2940 struct snd_soc_dapm_update update;
2941 int ret = 0;
2942
2943 if (item[0] >= e->items)
2944 return -EINVAL;
2945
2946 val = snd_soc_enum_item_to_val(e, item[0]) << e->shift_l;
2947 mask = e->mask << e->shift_l;
2948 if (e->shift_l != e->shift_r) {
2949 if (item[1] > e->items)
2950 return -EINVAL;
2951 val |= snd_soc_enum_item_to_val(e, item[1]) << e->shift_l;
2952 mask |= e->mask << e->shift_r;
2953 }
2954
2955 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2956
2957 if (e->reg != SND_SOC_NOPM)
2958 change = snd_soc_test_bits(codec, e->reg, mask, val);
2959 else
2960 change = dapm_kcontrol_set_value(kcontrol, val);
2961
2962 if (change) {
2963 if (e->reg != SND_SOC_NOPM) {
2964 update.kcontrol = kcontrol;
2965 update.reg = e->reg;
2966 update.mask = mask;
2967 update.val = val;
2968 card->update = &update;
2969 }
2970
2971 ret = soc_dapm_mux_update_power(card, kcontrol, item[0], e);
2972
2973 card->update = NULL;
2974 }
2975
2976 mutex_unlock(&card->dapm_mutex);
2977
2978 if (ret > 0)
2979 soc_dpcm_runtime_update(card);
2980
2981 return change;
2982 }
2983 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2984
2985 /**
2986 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2987 *
2988 * @kcontrol: mixer control
2989 * @uinfo: control element information
2990 *
2991 * Callback to provide information about a pin switch control.
2992 */
2993 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2994 struct snd_ctl_elem_info *uinfo)
2995 {
2996 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2997 uinfo->count = 1;
2998 uinfo->value.integer.min = 0;
2999 uinfo->value.integer.max = 1;
3000
3001 return 0;
3002 }
3003 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3004
3005 /**
3006 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3007 *
3008 * @kcontrol: mixer control
3009 * @ucontrol: Value
3010 */
3011 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3012 struct snd_ctl_elem_value *ucontrol)
3013 {
3014 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3015 const char *pin = (const char *)kcontrol->private_value;
3016
3017 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3018
3019 ucontrol->value.integer.value[0] =
3020 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3021
3022 mutex_unlock(&card->dapm_mutex);
3023
3024 return 0;
3025 }
3026 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3027
3028 /**
3029 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3030 *
3031 * @kcontrol: mixer control
3032 * @ucontrol: Value
3033 */
3034 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3035 struct snd_ctl_elem_value *ucontrol)
3036 {
3037 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3038 const char *pin = (const char *)kcontrol->private_value;
3039
3040 if (ucontrol->value.integer.value[0])
3041 snd_soc_dapm_enable_pin(&card->dapm, pin);
3042 else
3043 snd_soc_dapm_disable_pin(&card->dapm, pin);
3044
3045 snd_soc_dapm_sync(&card->dapm);
3046 return 0;
3047 }
3048 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3049
3050 static struct snd_soc_dapm_widget *
3051 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3052 const struct snd_soc_dapm_widget *widget)
3053 {
3054 struct snd_soc_dapm_widget *w;
3055 int ret;
3056
3057 if ((w = dapm_cnew_widget(widget)) == NULL)
3058 return NULL;
3059
3060 switch (w->id) {
3061 case snd_soc_dapm_regulator_supply:
3062 w->regulator = devm_regulator_get(dapm->dev, w->name);
3063 if (IS_ERR(w->regulator)) {
3064 ret = PTR_ERR(w->regulator);
3065 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3066 w->name, ret);
3067 return NULL;
3068 }
3069
3070 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3071 ret = regulator_allow_bypass(w->regulator, true);
3072 if (ret != 0)
3073 dev_warn(w->dapm->dev,
3074 "ASoC: Failed to bypass %s: %d\n",
3075 w->name, ret);
3076 }
3077 break;
3078 case snd_soc_dapm_clock_supply:
3079 #ifdef CONFIG_CLKDEV_LOOKUP
3080 w->clk = devm_clk_get(dapm->dev, w->name);
3081 if (IS_ERR(w->clk)) {
3082 ret = PTR_ERR(w->clk);
3083 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3084 w->name, ret);
3085 return NULL;
3086 }
3087 #else
3088 return NULL;
3089 #endif
3090 break;
3091 default:
3092 break;
3093 }
3094
3095 if (dapm->codec && dapm->codec->name_prefix)
3096 w->name = kasprintf(GFP_KERNEL, "%s %s",
3097 dapm->codec->name_prefix, widget->name);
3098 else
3099 w->name = kasprintf(GFP_KERNEL, "%s", widget->name);
3100
3101 if (w->name == NULL) {
3102 kfree(w);
3103 return NULL;
3104 }
3105
3106 switch (w->id) {
3107 case snd_soc_dapm_switch:
3108 case snd_soc_dapm_mixer:
3109 case snd_soc_dapm_mixer_named_ctl:
3110 w->power_check = dapm_generic_check_power;
3111 break;
3112 case snd_soc_dapm_mux:
3113 w->power_check = dapm_generic_check_power;
3114 break;
3115 case snd_soc_dapm_dai_out:
3116 w->power_check = dapm_adc_check_power;
3117 break;
3118 case snd_soc_dapm_dai_in:
3119 w->power_check = dapm_dac_check_power;
3120 break;
3121 case snd_soc_dapm_adc:
3122 case snd_soc_dapm_aif_out:
3123 case snd_soc_dapm_dac:
3124 case snd_soc_dapm_aif_in:
3125 case snd_soc_dapm_pga:
3126 case snd_soc_dapm_out_drv:
3127 case snd_soc_dapm_input:
3128 case snd_soc_dapm_output:
3129 case snd_soc_dapm_micbias:
3130 case snd_soc_dapm_spk:
3131 case snd_soc_dapm_hp:
3132 case snd_soc_dapm_mic:
3133 case snd_soc_dapm_line:
3134 case snd_soc_dapm_dai_link:
3135 w->power_check = dapm_generic_check_power;
3136 break;
3137 case snd_soc_dapm_supply:
3138 case snd_soc_dapm_regulator_supply:
3139 case snd_soc_dapm_clock_supply:
3140 case snd_soc_dapm_kcontrol:
3141 w->power_check = dapm_supply_check_power;
3142 break;
3143 default:
3144 w->power_check = dapm_always_on_check_power;
3145 break;
3146 }
3147
3148 w->dapm = dapm;
3149 w->codec = dapm->codec;
3150 w->platform = dapm->platform;
3151 INIT_LIST_HEAD(&w->sources);
3152 INIT_LIST_HEAD(&w->sinks);
3153 INIT_LIST_HEAD(&w->list);
3154 INIT_LIST_HEAD(&w->dirty);
3155 list_add(&w->list, &dapm->card->widgets);
3156
3157 /* machine layer set ups unconnected pins and insertions */
3158 w->connected = 1;
3159 return w;
3160 }
3161
3162 /**
3163 * snd_soc_dapm_new_controls - create new dapm controls
3164 * @dapm: DAPM context
3165 * @widget: widget array
3166 * @num: number of widgets
3167 *
3168 * Creates new DAPM controls based upon the templates.
3169 *
3170 * Returns 0 for success else error.
3171 */
3172 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3173 const struct snd_soc_dapm_widget *widget,
3174 int num)
3175 {
3176 struct snd_soc_dapm_widget *w;
3177 int i;
3178 int ret = 0;
3179
3180 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3181 for (i = 0; i < num; i++) {
3182 w = snd_soc_dapm_new_control(dapm, widget);
3183 if (!w) {
3184 dev_err(dapm->dev,
3185 "ASoC: Failed to create DAPM control %s\n",
3186 widget->name);
3187 ret = -ENOMEM;
3188 break;
3189 }
3190 widget++;
3191 }
3192 mutex_unlock(&dapm->card->dapm_mutex);
3193 return ret;
3194 }
3195 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3196
3197 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3198 struct snd_kcontrol *kcontrol, int event)
3199 {
3200 struct snd_soc_dapm_path *source_p, *sink_p;
3201 struct snd_soc_dai *source, *sink;
3202 const struct snd_soc_pcm_stream *config = w->params;
3203 struct snd_pcm_substream substream;
3204 struct snd_pcm_hw_params *params = NULL;
3205 u64 fmt;
3206 int ret;
3207
3208 if (WARN_ON(!config) ||
3209 WARN_ON(list_empty(&w->sources) || list_empty(&w->sinks)))
3210 return -EINVAL;
3211
3212 /* We only support a single source and sink, pick the first */
3213 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3214 list_sink);
3215 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3216 list_source);
3217
3218 if (WARN_ON(!source_p || !sink_p) ||
3219 WARN_ON(!sink_p->source || !source_p->sink) ||
3220 WARN_ON(!source_p->source || !sink_p->sink))
3221 return -EINVAL;
3222
3223 source = source_p->source->priv;
3224 sink = sink_p->sink->priv;
3225
3226 /* Be a little careful as we don't want to overflow the mask array */
3227 if (config->formats) {
3228 fmt = ffs(config->formats) - 1;
3229 } else {
3230 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3231 config->formats);
3232 fmt = 0;
3233 }
3234
3235 /* Currently very limited parameter selection */
3236 params = kzalloc(sizeof(*params), GFP_KERNEL);
3237 if (!params) {
3238 ret = -ENOMEM;
3239 goto out;
3240 }
3241 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3242
3243 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3244 config->rate_min;
3245 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3246 config->rate_max;
3247
3248 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3249 = config->channels_min;
3250 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3251 = config->channels_max;
3252
3253 memset(&substream, 0, sizeof(substream));
3254
3255 switch (event) {
3256 case SND_SOC_DAPM_PRE_PMU:
3257 if (source->driver->ops && source->driver->ops->hw_params) {
3258 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3259 ret = source->driver->ops->hw_params(&substream,
3260 params, source);
3261 if (ret != 0) {
3262 dev_err(source->dev,
3263 "ASoC: hw_params() failed: %d\n", ret);
3264 goto out;
3265 }
3266 }
3267
3268 if (sink->driver->ops && sink->driver->ops->hw_params) {
3269 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3270 ret = sink->driver->ops->hw_params(&substream, params,
3271 sink);
3272 if (ret != 0) {
3273 dev_err(sink->dev,
3274 "ASoC: hw_params() failed: %d\n", ret);
3275 goto out;
3276 }
3277 }
3278 break;
3279
3280 case SND_SOC_DAPM_POST_PMU:
3281 ret = snd_soc_dai_digital_mute(sink, 0,
3282 SNDRV_PCM_STREAM_PLAYBACK);
3283 if (ret != 0 && ret != -ENOTSUPP)
3284 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3285 ret = 0;
3286 break;
3287
3288 case SND_SOC_DAPM_PRE_PMD:
3289 ret = snd_soc_dai_digital_mute(sink, 1,
3290 SNDRV_PCM_STREAM_PLAYBACK);
3291 if (ret != 0 && ret != -ENOTSUPP)
3292 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3293 ret = 0;
3294 break;
3295
3296 default:
3297 WARN(1, "Unknown event %d\n", event);
3298 return -EINVAL;
3299 }
3300
3301 out:
3302 kfree(params);
3303 return ret;
3304 }
3305
3306 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3307 const struct snd_soc_pcm_stream *params,
3308 struct snd_soc_dapm_widget *source,
3309 struct snd_soc_dapm_widget *sink)
3310 {
3311 struct snd_soc_dapm_route routes[2];
3312 struct snd_soc_dapm_widget template;
3313 struct snd_soc_dapm_widget *w;
3314 size_t len;
3315 char *link_name;
3316
3317 len = strlen(source->name) + strlen(sink->name) + 2;
3318 link_name = devm_kzalloc(card->dev, len, GFP_KERNEL);
3319 if (!link_name)
3320 return -ENOMEM;
3321 snprintf(link_name, len, "%s-%s", source->name, sink->name);
3322
3323 memset(&template, 0, sizeof(template));
3324 template.reg = SND_SOC_NOPM;
3325 template.id = snd_soc_dapm_dai_link;
3326 template.name = link_name;
3327 template.event = snd_soc_dai_link_event;
3328 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3329 SND_SOC_DAPM_PRE_PMD;
3330
3331 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3332
3333 w = snd_soc_dapm_new_control(&card->dapm, &template);
3334 if (!w) {
3335 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3336 link_name);
3337 return -ENOMEM;
3338 }
3339
3340 w->params = params;
3341
3342 memset(&routes, 0, sizeof(routes));
3343
3344 routes[0].source = source->name;
3345 routes[0].sink = link_name;
3346 routes[1].source = link_name;
3347 routes[1].sink = sink->name;
3348
3349 return snd_soc_dapm_add_routes(&card->dapm, routes,
3350 ARRAY_SIZE(routes));
3351 }
3352
3353 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3354 struct snd_soc_dai *dai)
3355 {
3356 struct snd_soc_dapm_widget template;
3357 struct snd_soc_dapm_widget *w;
3358
3359 WARN_ON(dapm->dev != dai->dev);
3360
3361 memset(&template, 0, sizeof(template));
3362 template.reg = SND_SOC_NOPM;
3363
3364 if (dai->driver->playback.stream_name) {
3365 template.id = snd_soc_dapm_dai_in;
3366 template.name = dai->driver->playback.stream_name;
3367 template.sname = dai->driver->playback.stream_name;
3368
3369 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3370 template.name);
3371
3372 w = snd_soc_dapm_new_control(dapm, &template);
3373 if (!w) {
3374 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3375 dai->driver->playback.stream_name);
3376 return -ENOMEM;
3377 }
3378
3379 w->priv = dai;
3380 dai->playback_widget = w;
3381 }
3382
3383 if (dai->driver->capture.stream_name) {
3384 template.id = snd_soc_dapm_dai_out;
3385 template.name = dai->driver->capture.stream_name;
3386 template.sname = dai->driver->capture.stream_name;
3387
3388 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3389 template.name);
3390
3391 w = snd_soc_dapm_new_control(dapm, &template);
3392 if (!w) {
3393 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3394 dai->driver->capture.stream_name);
3395 return -ENOMEM;
3396 }
3397
3398 w->priv = dai;
3399 dai->capture_widget = w;
3400 }
3401
3402 return 0;
3403 }
3404
3405 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3406 {
3407 struct snd_soc_dapm_widget *dai_w, *w;
3408 struct snd_soc_dai *dai;
3409
3410 /* For each DAI widget... */
3411 list_for_each_entry(dai_w, &card->widgets, list) {
3412 switch (dai_w->id) {
3413 case snd_soc_dapm_dai_in:
3414 case snd_soc_dapm_dai_out:
3415 break;
3416 default:
3417 continue;
3418 }
3419
3420 dai = dai_w->priv;
3421
3422 /* ...find all widgets with the same stream and link them */
3423 list_for_each_entry(w, &card->widgets, list) {
3424 if (w->dapm != dai_w->dapm)
3425 continue;
3426
3427 switch (w->id) {
3428 case snd_soc_dapm_dai_in:
3429 case snd_soc_dapm_dai_out:
3430 continue;
3431 default:
3432 break;
3433 }
3434
3435 if (!w->sname || !strstr(w->sname, dai_w->name))
3436 continue;
3437
3438 if (dai->driver->playback.stream_name &&
3439 strstr(w->sname,
3440 dai->driver->playback.stream_name)) {
3441 dev_dbg(dai->dev, "%s -> %s\n",
3442 dai->playback_widget->name, w->name);
3443
3444 snd_soc_dapm_add_path(w->dapm,
3445 dai->playback_widget, w, NULL, NULL);
3446 }
3447
3448 if (dai->driver->capture.stream_name &&
3449 strstr(w->sname,
3450 dai->driver->capture.stream_name)) {
3451 dev_dbg(dai->dev, "%s -> %s\n",
3452 w->name, dai->capture_widget->name);
3453
3454 snd_soc_dapm_add_path(w->dapm, w,
3455 dai->capture_widget, NULL, NULL);
3456 }
3457 }
3458 }
3459
3460 return 0;
3461 }
3462
3463 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
3464 {
3465 struct snd_soc_pcm_runtime *rtd = card->rtd;
3466 struct snd_soc_dai *cpu_dai, *codec_dai;
3467 struct snd_soc_dapm_route r;
3468 int i;
3469
3470 memset(&r, 0, sizeof(r));
3471
3472 /* for each BE DAI link... */
3473 for (i = 0; i < card->num_rtd; i++) {
3474 rtd = &card->rtd[i];
3475 cpu_dai = rtd->cpu_dai;
3476 codec_dai = rtd->codec_dai;
3477
3478 /* dynamic FE links have no fixed DAI mapping */
3479 if (rtd->dai_link->dynamic)
3480 continue;
3481
3482 /* there is no point in connecting BE DAI links with dummies */
3483 if (snd_soc_dai_is_dummy(codec_dai) ||
3484 snd_soc_dai_is_dummy(cpu_dai))
3485 continue;
3486
3487 /* connect BE DAI playback if widgets are valid */
3488 if (codec_dai->playback_widget && cpu_dai->playback_widget) {
3489 r.source = cpu_dai->playback_widget->name;
3490 r.sink = codec_dai->playback_widget->name;
3491 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3492 cpu_dai->codec->name, r.source,
3493 codec_dai->platform->name, r.sink);
3494
3495 snd_soc_dapm_add_route(&card->dapm, &r, true);
3496 }
3497
3498 /* connect BE DAI capture if widgets are valid */
3499 if (codec_dai->capture_widget && cpu_dai->capture_widget) {
3500 r.source = codec_dai->capture_widget->name;
3501 r.sink = cpu_dai->capture_widget->name;
3502 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3503 codec_dai->codec->name, r.source,
3504 cpu_dai->platform->name, r.sink);
3505
3506 snd_soc_dapm_add_route(&card->dapm, &r, true);
3507 }
3508
3509 }
3510 }
3511
3512 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3513 int event)
3514 {
3515
3516 struct snd_soc_dapm_widget *w_cpu, *w_codec;
3517 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3518 struct snd_soc_dai *codec_dai = rtd->codec_dai;
3519
3520 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
3521 w_cpu = cpu_dai->playback_widget;
3522 w_codec = codec_dai->playback_widget;
3523 } else {
3524 w_cpu = cpu_dai->capture_widget;
3525 w_codec = codec_dai->capture_widget;
3526 }
3527
3528 if (w_cpu) {
3529
3530 dapm_mark_dirty(w_cpu, "stream event");
3531
3532 switch (event) {
3533 case SND_SOC_DAPM_STREAM_START:
3534 w_cpu->active = 1;
3535 break;
3536 case SND_SOC_DAPM_STREAM_STOP:
3537 w_cpu->active = 0;
3538 break;
3539 case SND_SOC_DAPM_STREAM_SUSPEND:
3540 case SND_SOC_DAPM_STREAM_RESUME:
3541 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3542 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3543 break;
3544 }
3545 }
3546
3547 if (w_codec) {
3548
3549 dapm_mark_dirty(w_codec, "stream event");
3550
3551 switch (event) {
3552 case SND_SOC_DAPM_STREAM_START:
3553 w_codec->active = 1;
3554 break;
3555 case SND_SOC_DAPM_STREAM_STOP:
3556 w_codec->active = 0;
3557 break;
3558 case SND_SOC_DAPM_STREAM_SUSPEND:
3559 case SND_SOC_DAPM_STREAM_RESUME:
3560 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3561 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3562 break;
3563 }
3564 }
3565
3566 dapm_power_widgets(rtd->card, event);
3567 }
3568
3569 /**
3570 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3571 * @rtd: PCM runtime data
3572 * @stream: stream name
3573 * @event: stream event
3574 *
3575 * Sends a stream event to the dapm core. The core then makes any
3576 * necessary widget power changes.
3577 *
3578 * Returns 0 for success else error.
3579 */
3580 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3581 int event)
3582 {
3583 struct snd_soc_card *card = rtd->card;
3584
3585 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3586 soc_dapm_stream_event(rtd, stream, event);
3587 mutex_unlock(&card->dapm_mutex);
3588 }
3589
3590 /**
3591 * snd_soc_dapm_enable_pin_unlocked - enable pin.
3592 * @dapm: DAPM context
3593 * @pin: pin name
3594 *
3595 * Enables input/output pin and its parents or children widgets iff there is
3596 * a valid audio route and active audio stream.
3597 *
3598 * Requires external locking.
3599 *
3600 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3601 * do any widget power switching.
3602 */
3603 int snd_soc_dapm_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3604 const char *pin)
3605 {
3606 return snd_soc_dapm_set_pin(dapm, pin, 1);
3607 }
3608 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin_unlocked);
3609
3610 /**
3611 * snd_soc_dapm_enable_pin - enable pin.
3612 * @dapm: DAPM context
3613 * @pin: pin name
3614 *
3615 * Enables input/output pin and its parents or children widgets iff there is
3616 * a valid audio route and active audio stream.
3617 *
3618 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3619 * do any widget power switching.
3620 */
3621 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3622 {
3623 int ret;
3624
3625 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3626
3627 ret = snd_soc_dapm_set_pin(dapm, pin, 1);
3628
3629 mutex_unlock(&dapm->card->dapm_mutex);
3630
3631 return ret;
3632 }
3633 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3634
3635 /**
3636 * snd_soc_dapm_force_enable_pin_unlocked - force a pin to be enabled
3637 * @dapm: DAPM context
3638 * @pin: pin name
3639 *
3640 * Enables input/output pin regardless of any other state. This is
3641 * intended for use with microphone bias supplies used in microphone
3642 * jack detection.
3643 *
3644 * Requires external locking.
3645 *
3646 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3647 * do any widget power switching.
3648 */
3649 int snd_soc_dapm_force_enable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3650 const char *pin)
3651 {
3652 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3653
3654 if (!w) {
3655 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3656 return -EINVAL;
3657 }
3658
3659 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
3660 w->connected = 1;
3661 w->force = 1;
3662 dapm_mark_dirty(w, "force enable");
3663
3664 return 0;
3665 }
3666 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin_unlocked);
3667
3668 /**
3669 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3670 * @dapm: DAPM context
3671 * @pin: pin name
3672 *
3673 * Enables input/output pin regardless of any other state. This is
3674 * intended for use with microphone bias supplies used in microphone
3675 * jack detection.
3676 *
3677 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3678 * do any widget power switching.
3679 */
3680 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3681 const char *pin)
3682 {
3683 int ret;
3684
3685 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3686
3687 ret = snd_soc_dapm_force_enable_pin_unlocked(dapm, pin);
3688
3689 mutex_unlock(&dapm->card->dapm_mutex);
3690
3691 return ret;
3692 }
3693 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3694
3695 /**
3696 * snd_soc_dapm_disable_pin_unlocked - disable pin.
3697 * @dapm: DAPM context
3698 * @pin: pin name
3699 *
3700 * Disables input/output pin and its parents or children widgets.
3701 *
3702 * Requires external locking.
3703 *
3704 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3705 * do any widget power switching.
3706 */
3707 int snd_soc_dapm_disable_pin_unlocked(struct snd_soc_dapm_context *dapm,
3708 const char *pin)
3709 {
3710 return snd_soc_dapm_set_pin(dapm, pin, 0);
3711 }
3712 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin_unlocked);
3713
3714 /**
3715 * snd_soc_dapm_disable_pin - disable pin.
3716 * @dapm: DAPM context
3717 * @pin: pin name
3718 *
3719 * Disables input/output pin and its parents or children widgets.
3720 *
3721 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3722 * do any widget power switching.
3723 */
3724 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3725 const char *pin)
3726 {
3727 int ret;
3728
3729 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3730
3731 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
3732
3733 mutex_unlock(&dapm->card->dapm_mutex);
3734
3735 return ret;
3736 }
3737 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3738
3739 /**
3740 * snd_soc_dapm_nc_pin_unlocked - permanently disable pin.
3741 * @dapm: DAPM context
3742 * @pin: pin name
3743 *
3744 * Marks the specified pin as being not connected, disabling it along
3745 * any parent or child widgets. At present this is identical to
3746 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3747 * additional things such as disabling controls which only affect
3748 * paths through the pin.
3749 *
3750 * Requires external locking.
3751 *
3752 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3753 * do any widget power switching.
3754 */
3755 int snd_soc_dapm_nc_pin_unlocked(struct snd_soc_dapm_context *dapm,
3756 const char *pin)
3757 {
3758 return snd_soc_dapm_set_pin(dapm, pin, 0);
3759 }
3760 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin_unlocked);
3761
3762 /**
3763 * snd_soc_dapm_nc_pin - permanently disable pin.
3764 * @dapm: DAPM context
3765 * @pin: pin name
3766 *
3767 * Marks the specified pin as being not connected, disabling it along
3768 * any parent or child widgets. At present this is identical to
3769 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3770 * additional things such as disabling controls which only affect
3771 * paths through the pin.
3772 *
3773 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3774 * do any widget power switching.
3775 */
3776 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3777 {
3778 int ret;
3779
3780 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3781
3782 ret = snd_soc_dapm_set_pin(dapm, pin, 0);
3783
3784 mutex_unlock(&dapm->card->dapm_mutex);
3785
3786 return ret;
3787 }
3788 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3789
3790 /**
3791 * snd_soc_dapm_get_pin_status - get audio pin status
3792 * @dapm: DAPM context
3793 * @pin: audio signal pin endpoint (or start point)
3794 *
3795 * Get audio pin status - connected or disconnected.
3796 *
3797 * Returns 1 for connected otherwise 0.
3798 */
3799 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3800 const char *pin)
3801 {
3802 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3803
3804 if (w)
3805 return w->connected;
3806
3807 return 0;
3808 }
3809 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3810
3811 /**
3812 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3813 * @dapm: DAPM context
3814 * @pin: audio signal pin endpoint (or start point)
3815 *
3816 * Mark the given endpoint or pin as ignoring suspend. When the
3817 * system is disabled a path between two endpoints flagged as ignoring
3818 * suspend will not be disabled. The path must already be enabled via
3819 * normal means at suspend time, it will not be turned on if it was not
3820 * already enabled.
3821 */
3822 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3823 const char *pin)
3824 {
3825 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3826
3827 if (!w) {
3828 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3829 return -EINVAL;
3830 }
3831
3832 w->ignore_suspend = 1;
3833
3834 return 0;
3835 }
3836 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3837
3838 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3839 struct snd_soc_dapm_widget *w)
3840 {
3841 struct snd_soc_dapm_path *p;
3842
3843 list_for_each_entry(p, &card->paths, list) {
3844 if ((p->source == w) || (p->sink == w)) {
3845 dev_dbg(card->dev,
3846 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3847 p->source->name, p->source->id, p->source->dapm,
3848 p->sink->name, p->sink->id, p->sink->dapm);
3849
3850 /* Connected to something other than the codec */
3851 if (p->source->dapm != p->sink->dapm)
3852 return true;
3853 /*
3854 * Loopback connection from codec external pin to
3855 * codec external pin
3856 */
3857 if (p->sink->id == snd_soc_dapm_input) {
3858 switch (p->source->id) {
3859 case snd_soc_dapm_output:
3860 case snd_soc_dapm_micbias:
3861 return true;
3862 default:
3863 break;
3864 }
3865 }
3866 }
3867 }
3868
3869 return false;
3870 }
3871
3872 /**
3873 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3874 * @codec: The codec whose pins should be processed
3875 *
3876 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3877 * which are unused. Pins are used if they are connected externally to the
3878 * codec, whether that be to some other device, or a loop-back connection to
3879 * the codec itself.
3880 */
3881 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3882 {
3883 struct snd_soc_card *card = codec->card;
3884 struct snd_soc_dapm_context *dapm = &codec->dapm;
3885 struct snd_soc_dapm_widget *w;
3886
3887 dev_dbg(codec->dev, "ASoC: Auto NC: DAPMs: card:%p codec:%p\n",
3888 &card->dapm, &codec->dapm);
3889
3890 list_for_each_entry(w, &card->widgets, list) {
3891 if (w->dapm != dapm)
3892 continue;
3893 switch (w->id) {
3894 case snd_soc_dapm_input:
3895 case snd_soc_dapm_output:
3896 case snd_soc_dapm_micbias:
3897 dev_dbg(codec->dev, "ASoC: Auto NC: Checking widget %s\n",
3898 w->name);
3899 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3900 dev_dbg(codec->dev,
3901 "... Not in map; disabling\n");
3902 snd_soc_dapm_nc_pin(dapm, w->name);
3903 }
3904 break;
3905 default:
3906 break;
3907 }
3908 }
3909 }
3910
3911 /**
3912 * snd_soc_dapm_free - free dapm resources
3913 * @dapm: DAPM context
3914 *
3915 * Free all dapm widgets and resources.
3916 */
3917 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3918 {
3919 snd_soc_dapm_sys_remove(dapm->dev);
3920 dapm_debugfs_cleanup(dapm);
3921 dapm_free_widgets(dapm);
3922 list_del(&dapm->list);
3923 }
3924 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3925
3926 static void soc_dapm_shutdown_dapm(struct snd_soc_dapm_context *dapm)
3927 {
3928 struct snd_soc_card *card = dapm->card;
3929 struct snd_soc_dapm_widget *w;
3930 LIST_HEAD(down_list);
3931 int powerdown = 0;
3932
3933 mutex_lock(&card->dapm_mutex);
3934
3935 list_for_each_entry(w, &dapm->card->widgets, list) {
3936 if (w->dapm != dapm)
3937 continue;
3938 if (w->power) {
3939 dapm_seq_insert(w, &down_list, false);
3940 w->power = 0;
3941 powerdown = 1;
3942 }
3943 }
3944
3945 /* If there were no widgets to power down we're already in
3946 * standby.
3947 */
3948 if (powerdown) {
3949 if (dapm->bias_level == SND_SOC_BIAS_ON)
3950 snd_soc_dapm_set_bias_level(dapm,
3951 SND_SOC_BIAS_PREPARE);
3952 dapm_seq_run(card, &down_list, 0, false);
3953 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3954 snd_soc_dapm_set_bias_level(dapm,
3955 SND_SOC_BIAS_STANDBY);
3956 }
3957
3958 mutex_unlock(&card->dapm_mutex);
3959 }
3960
3961 /*
3962 * snd_soc_dapm_shutdown - callback for system shutdown
3963 */
3964 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3965 {
3966 struct snd_soc_dapm_context *dapm;
3967
3968 list_for_each_entry(dapm, &card->dapm_list, list) {
3969 if (dapm != &card->dapm) {
3970 soc_dapm_shutdown_dapm(dapm);
3971 if (dapm->bias_level == SND_SOC_BIAS_STANDBY)
3972 snd_soc_dapm_set_bias_level(dapm,
3973 SND_SOC_BIAS_OFF);
3974 }
3975 }
3976
3977 soc_dapm_shutdown_dapm(&card->dapm);
3978 if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3979 snd_soc_dapm_set_bias_level(&card->dapm,
3980 SND_SOC_BIAS_OFF);
3981 }
3982
3983 /* Module information */
3984 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3985 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3986 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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