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Merge remote-tracking branch 'asoc/topic/cs42l52' into asoc-next
[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_supply] = 1,
63 [snd_soc_dapm_regulator_supply] = 1,
64 [snd_soc_dapm_clock_supply] = 1,
65 [snd_soc_dapm_micbias] = 2,
66 [snd_soc_dapm_dai_link] = 2,
67 [snd_soc_dapm_dai_in] = 3,
68 [snd_soc_dapm_dai_out] = 3,
69 [snd_soc_dapm_aif_in] = 3,
70 [snd_soc_dapm_aif_out] = 3,
71 [snd_soc_dapm_mic] = 4,
72 [snd_soc_dapm_mux] = 5,
73 [snd_soc_dapm_virt_mux] = 5,
74 [snd_soc_dapm_value_mux] = 5,
75 [snd_soc_dapm_dac] = 6,
76 [snd_soc_dapm_switch] = 7,
77 [snd_soc_dapm_mixer] = 7,
78 [snd_soc_dapm_mixer_named_ctl] = 7,
79 [snd_soc_dapm_pga] = 8,
80 [snd_soc_dapm_adc] = 9,
81 [snd_soc_dapm_out_drv] = 10,
82 [snd_soc_dapm_hp] = 10,
83 [snd_soc_dapm_spk] = 10,
84 [snd_soc_dapm_line] = 10,
85 [snd_soc_dapm_kcontrol] = 11,
86 [snd_soc_dapm_post] = 12,
87 };
88
89 static int dapm_down_seq[] = {
90 [snd_soc_dapm_pre] = 0,
91 [snd_soc_dapm_kcontrol] = 1,
92 [snd_soc_dapm_adc] = 2,
93 [snd_soc_dapm_hp] = 3,
94 [snd_soc_dapm_spk] = 3,
95 [snd_soc_dapm_line] = 3,
96 [snd_soc_dapm_out_drv] = 3,
97 [snd_soc_dapm_pga] = 4,
98 [snd_soc_dapm_switch] = 5,
99 [snd_soc_dapm_mixer_named_ctl] = 5,
100 [snd_soc_dapm_mixer] = 5,
101 [snd_soc_dapm_dac] = 6,
102 [snd_soc_dapm_mic] = 7,
103 [snd_soc_dapm_micbias] = 8,
104 [snd_soc_dapm_mux] = 9,
105 [snd_soc_dapm_virt_mux] = 9,
106 [snd_soc_dapm_value_mux] = 9,
107 [snd_soc_dapm_aif_in] = 10,
108 [snd_soc_dapm_aif_out] = 10,
109 [snd_soc_dapm_dai_in] = 10,
110 [snd_soc_dapm_dai_out] = 10,
111 [snd_soc_dapm_dai_link] = 11,
112 [snd_soc_dapm_clock_supply] = 12,
113 [snd_soc_dapm_regulator_supply] = 12,
114 [snd_soc_dapm_supply] = 12,
115 [snd_soc_dapm_post] = 13,
116 };
117
118 static void pop_wait(u32 pop_time)
119 {
120 if (pop_time)
121 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
122 }
123
124 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
125 {
126 va_list args;
127 char *buf;
128
129 if (!pop_time)
130 return;
131
132 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
133 if (buf == NULL)
134 return;
135
136 va_start(args, fmt);
137 vsnprintf(buf, PAGE_SIZE, fmt, args);
138 dev_info(dev, "%s", buf);
139 va_end(args);
140
141 kfree(buf);
142 }
143
144 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
145 {
146 return !list_empty(&w->dirty);
147 }
148
149 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
150 {
151 if (!dapm_dirty_widget(w)) {
152 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
153 w->name, reason);
154 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
155 }
156 }
157 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
158
159 void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm)
160 {
161 struct snd_soc_card *card = dapm->card;
162 struct snd_soc_dapm_widget *w;
163
164 mutex_lock(&card->dapm_mutex);
165
166 list_for_each_entry(w, &card->widgets, list) {
167 switch (w->id) {
168 case snd_soc_dapm_input:
169 case snd_soc_dapm_output:
170 dapm_mark_dirty(w, "Rechecking inputs and outputs");
171 break;
172 default:
173 break;
174 }
175 }
176
177 mutex_unlock(&card->dapm_mutex);
178 }
179 EXPORT_SYMBOL_GPL(dapm_mark_io_dirty);
180
181 /* create a new dapm widget */
182 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
183 const struct snd_soc_dapm_widget *_widget)
184 {
185 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
186 }
187
188 struct dapm_kcontrol_data {
189 unsigned int value;
190 struct snd_soc_dapm_widget *widget;
191 struct list_head paths;
192 struct snd_soc_dapm_widget_list *wlist;
193 };
194
195 static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
196 struct snd_kcontrol *kcontrol)
197 {
198 struct dapm_kcontrol_data *data;
199 struct soc_mixer_control *mc;
200
201 data = kzalloc(sizeof(*data), GFP_KERNEL);
202 if (!data) {
203 dev_err(widget->dapm->dev,
204 "ASoC: can't allocate kcontrol data for %s\n",
205 widget->name);
206 return -ENOMEM;
207 }
208
209 INIT_LIST_HEAD(&data->paths);
210
211 switch (widget->id) {
212 case snd_soc_dapm_switch:
213 case snd_soc_dapm_mixer:
214 case snd_soc_dapm_mixer_named_ctl:
215 mc = (struct soc_mixer_control *)kcontrol->private_value;
216
217 if (mc->autodisable) {
218 struct snd_soc_dapm_widget template;
219
220 memset(&template, 0, sizeof(template));
221 template.reg = mc->reg;
222 template.mask = (1 << fls(mc->max)) - 1;
223 template.shift = mc->shift;
224 if (mc->invert)
225 template.off_val = mc->max;
226 else
227 template.off_val = 0;
228 template.on_val = template.off_val;
229 template.id = snd_soc_dapm_kcontrol;
230 template.name = kcontrol->id.name;
231
232 data->value = template.on_val;
233
234 data->widget = snd_soc_dapm_new_control(widget->dapm,
235 &template);
236 if (!data->widget) {
237 kfree(data);
238 return -ENOMEM;
239 }
240 }
241 break;
242 default:
243 break;
244 }
245
246 kcontrol->private_data = data;
247
248 return 0;
249 }
250
251 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
252 {
253 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
254 kfree(data->widget);
255 kfree(data->wlist);
256 kfree(data);
257 }
258
259 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
260 const struct snd_kcontrol *kcontrol)
261 {
262 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
263
264 return data->wlist;
265 }
266
267 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
268 struct snd_soc_dapm_widget *widget)
269 {
270 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
271 struct snd_soc_dapm_widget_list *new_wlist;
272 unsigned int n;
273
274 if (data->wlist)
275 n = data->wlist->num_widgets + 1;
276 else
277 n = 1;
278
279 new_wlist = krealloc(data->wlist,
280 sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
281 if (!new_wlist)
282 return -ENOMEM;
283
284 new_wlist->widgets[n - 1] = widget;
285 new_wlist->num_widgets = n;
286
287 data->wlist = new_wlist;
288
289 return 0;
290 }
291
292 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
293 struct snd_soc_dapm_path *path)
294 {
295 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
296
297 list_add_tail(&path->list_kcontrol, &data->paths);
298
299 if (data->widget) {
300 snd_soc_dapm_add_path(data->widget->dapm, data->widget,
301 path->source, NULL, NULL);
302 }
303 }
304
305 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
306 {
307 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
308
309 if (!data->widget)
310 return true;
311
312 return data->widget->power;
313 }
314
315 static struct list_head *dapm_kcontrol_get_path_list(
316 const struct snd_kcontrol *kcontrol)
317 {
318 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
319
320 return &data->paths;
321 }
322
323 #define dapm_kcontrol_for_each_path(path, kcontrol) \
324 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
325 list_kcontrol)
326
327 static unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
328 {
329 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
330
331 return data->value;
332 }
333
334 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
335 unsigned int value)
336 {
337 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
338
339 if (data->value == value)
340 return false;
341
342 if (data->widget)
343 data->widget->on_val = value;
344
345 data->value = value;
346
347 return true;
348 }
349
350 /**
351 * snd_soc_dapm_kcontrol_codec() - Returns the codec associated to a kcontrol
352 * @kcontrol: The kcontrol
353 */
354 struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(struct snd_kcontrol *kcontrol)
355 {
356 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->codec;
357 }
358 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_codec);
359
360 static void dapm_reset(struct snd_soc_card *card)
361 {
362 struct snd_soc_dapm_widget *w;
363
364 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
365
366 list_for_each_entry(w, &card->widgets, list) {
367 w->new_power = w->power;
368 w->power_checked = false;
369 w->inputs = -1;
370 w->outputs = -1;
371 }
372 }
373
374 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
375 {
376 if (w->codec)
377 return snd_soc_read(w->codec, reg);
378 else if (w->platform)
379 return snd_soc_platform_read(w->platform, reg);
380
381 dev_err(w->dapm->dev, "ASoC: no valid widget read method\n");
382 return -1;
383 }
384
385 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
386 {
387 if (w->codec)
388 return snd_soc_write(w->codec, reg, val);
389 else if (w->platform)
390 return snd_soc_platform_write(w->platform, reg, val);
391
392 dev_err(w->dapm->dev, "ASoC: no valid widget write method\n");
393 return -1;
394 }
395
396 static inline void soc_widget_lock(struct snd_soc_dapm_widget *w)
397 {
398 if (w->codec && !w->codec->using_regmap)
399 mutex_lock(&w->codec->mutex);
400 else if (w->platform)
401 mutex_lock(&w->platform->mutex);
402 }
403
404 static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w)
405 {
406 if (w->codec && !w->codec->using_regmap)
407 mutex_unlock(&w->codec->mutex);
408 else if (w->platform)
409 mutex_unlock(&w->platform->mutex);
410 }
411
412 static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
413 unsigned short reg, unsigned int mask, unsigned int value)
414 {
415 bool change;
416 unsigned int old, new;
417 int ret;
418
419 if (w->codec && w->codec->using_regmap) {
420 ret = regmap_update_bits_check(w->codec->control_data,
421 reg, mask, value, &change);
422 if (ret != 0)
423 return ret;
424 } else {
425 soc_widget_lock(w);
426 ret = soc_widget_read(w, reg);
427 if (ret < 0) {
428 soc_widget_unlock(w);
429 return ret;
430 }
431
432 old = ret;
433 new = (old & ~mask) | (value & mask);
434 change = old != new;
435 if (change) {
436 ret = soc_widget_write(w, reg, new);
437 if (ret < 0) {
438 soc_widget_unlock(w);
439 return ret;
440 }
441 }
442 soc_widget_unlock(w);
443 }
444
445 return change;
446 }
447
448 /**
449 * snd_soc_dapm_set_bias_level - set the bias level for the system
450 * @dapm: DAPM context
451 * @level: level to configure
452 *
453 * Configure the bias (power) levels for the SoC audio device.
454 *
455 * Returns 0 for success else error.
456 */
457 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
458 enum snd_soc_bias_level level)
459 {
460 struct snd_soc_card *card = dapm->card;
461 int ret = 0;
462
463 trace_snd_soc_bias_level_start(card, level);
464
465 if (card && card->set_bias_level)
466 ret = card->set_bias_level(card, dapm, level);
467 if (ret != 0)
468 goto out;
469
470 if (dapm->codec) {
471 if (dapm->codec->driver->set_bias_level)
472 ret = dapm->codec->driver->set_bias_level(dapm->codec,
473 level);
474 else
475 dapm->bias_level = level;
476 } else if (!card || dapm != &card->dapm) {
477 dapm->bias_level = level;
478 }
479
480 if (ret != 0)
481 goto out;
482
483 if (card && card->set_bias_level_post)
484 ret = card->set_bias_level_post(card, dapm, level);
485 out:
486 trace_snd_soc_bias_level_done(card, level);
487
488 return ret;
489 }
490
491 /* set up initial codec paths */
492 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
493 struct snd_soc_dapm_path *p, int i)
494 {
495 switch (w->id) {
496 case snd_soc_dapm_switch:
497 case snd_soc_dapm_mixer:
498 case snd_soc_dapm_mixer_named_ctl: {
499 int val;
500 struct soc_mixer_control *mc = (struct soc_mixer_control *)
501 w->kcontrol_news[i].private_value;
502 unsigned int reg = mc->reg;
503 unsigned int shift = mc->shift;
504 int max = mc->max;
505 unsigned int mask = (1 << fls(max)) - 1;
506 unsigned int invert = mc->invert;
507
508 val = soc_widget_read(w, reg);
509 val = (val >> shift) & mask;
510 if (invert)
511 val = max - val;
512
513 p->connect = !!val;
514 }
515 break;
516 case snd_soc_dapm_mux: {
517 struct soc_enum *e = (struct soc_enum *)
518 w->kcontrol_news[i].private_value;
519 int val, item;
520
521 val = soc_widget_read(w, e->reg);
522 item = (val >> e->shift_l) & e->mask;
523
524 if (item < e->max && !strcmp(p->name, e->texts[item]))
525 p->connect = 1;
526 else
527 p->connect = 0;
528 }
529 break;
530 case snd_soc_dapm_virt_mux: {
531 struct soc_enum *e = (struct soc_enum *)
532 w->kcontrol_news[i].private_value;
533
534 p->connect = 0;
535 /* since a virtual mux has no backing registers to
536 * decide which path to connect, it will try to match
537 * with the first enumeration. This is to ensure
538 * that the default mux choice (the first) will be
539 * correctly powered up during initialization.
540 */
541 if (!strcmp(p->name, e->texts[0]))
542 p->connect = 1;
543 }
544 break;
545 case snd_soc_dapm_value_mux: {
546 struct soc_enum *e = (struct soc_enum *)
547 w->kcontrol_news[i].private_value;
548 int val, item;
549
550 val = soc_widget_read(w, e->reg);
551 val = (val >> e->shift_l) & e->mask;
552 for (item = 0; item < e->max; item++) {
553 if (val == e->values[item])
554 break;
555 }
556
557 if (item < e->max && !strcmp(p->name, e->texts[item]))
558 p->connect = 1;
559 else
560 p->connect = 0;
561 }
562 break;
563 /* does not affect routing - always connected */
564 case snd_soc_dapm_pga:
565 case snd_soc_dapm_out_drv:
566 case snd_soc_dapm_output:
567 case snd_soc_dapm_adc:
568 case snd_soc_dapm_input:
569 case snd_soc_dapm_siggen:
570 case snd_soc_dapm_dac:
571 case snd_soc_dapm_micbias:
572 case snd_soc_dapm_vmid:
573 case snd_soc_dapm_supply:
574 case snd_soc_dapm_regulator_supply:
575 case snd_soc_dapm_clock_supply:
576 case snd_soc_dapm_aif_in:
577 case snd_soc_dapm_aif_out:
578 case snd_soc_dapm_dai_in:
579 case snd_soc_dapm_dai_out:
580 case snd_soc_dapm_hp:
581 case snd_soc_dapm_mic:
582 case snd_soc_dapm_spk:
583 case snd_soc_dapm_line:
584 case snd_soc_dapm_dai_link:
585 case snd_soc_dapm_kcontrol:
586 p->connect = 1;
587 break;
588 /* does affect routing - dynamically connected */
589 case snd_soc_dapm_pre:
590 case snd_soc_dapm_post:
591 p->connect = 0;
592 break;
593 }
594 }
595
596 /* connect mux widget to its interconnecting audio paths */
597 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
598 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
599 struct snd_soc_dapm_path *path, const char *control_name,
600 const struct snd_kcontrol_new *kcontrol)
601 {
602 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
603 int i;
604
605 for (i = 0; i < e->max; i++) {
606 if (!(strcmp(control_name, e->texts[i]))) {
607 list_add(&path->list, &dapm->card->paths);
608 list_add(&path->list_sink, &dest->sources);
609 list_add(&path->list_source, &src->sinks);
610 path->name = (char*)e->texts[i];
611 dapm_set_path_status(dest, path, 0);
612 return 0;
613 }
614 }
615
616 return -ENODEV;
617 }
618
619 /* connect mixer widget to its interconnecting audio paths */
620 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
621 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
622 struct snd_soc_dapm_path *path, const char *control_name)
623 {
624 int i;
625
626 /* search for mixer kcontrol */
627 for (i = 0; i < dest->num_kcontrols; i++) {
628 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
629 list_add(&path->list, &dapm->card->paths);
630 list_add(&path->list_sink, &dest->sources);
631 list_add(&path->list_source, &src->sinks);
632 path->name = dest->kcontrol_news[i].name;
633 dapm_set_path_status(dest, path, i);
634 return 0;
635 }
636 }
637 return -ENODEV;
638 }
639
640 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
641 struct snd_soc_dapm_widget *kcontrolw,
642 const struct snd_kcontrol_new *kcontrol_new,
643 struct snd_kcontrol **kcontrol)
644 {
645 struct snd_soc_dapm_widget *w;
646 int i;
647
648 *kcontrol = NULL;
649
650 list_for_each_entry(w, &dapm->card->widgets, list) {
651 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
652 continue;
653 for (i = 0; i < w->num_kcontrols; i++) {
654 if (&w->kcontrol_news[i] == kcontrol_new) {
655 if (w->kcontrols)
656 *kcontrol = w->kcontrols[i];
657 return 1;
658 }
659 }
660 }
661
662 return 0;
663 }
664
665 /*
666 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
667 * create it. Either way, add the widget into the control's widget list
668 */
669 static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w,
670 int kci)
671 {
672 struct snd_soc_dapm_context *dapm = w->dapm;
673 struct snd_card *card = dapm->card->snd_card;
674 const char *prefix;
675 size_t prefix_len;
676 int shared;
677 struct snd_kcontrol *kcontrol;
678 bool wname_in_long_name, kcname_in_long_name;
679 char *long_name;
680 const char *name;
681 int ret;
682
683 if (dapm->codec)
684 prefix = dapm->codec->name_prefix;
685 else
686 prefix = NULL;
687
688 if (prefix)
689 prefix_len = strlen(prefix) + 1;
690 else
691 prefix_len = 0;
692
693 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
694 &kcontrol);
695
696 if (!kcontrol) {
697 if (shared) {
698 wname_in_long_name = false;
699 kcname_in_long_name = true;
700 } else {
701 switch (w->id) {
702 case snd_soc_dapm_switch:
703 case snd_soc_dapm_mixer:
704 wname_in_long_name = true;
705 kcname_in_long_name = true;
706 break;
707 case snd_soc_dapm_mixer_named_ctl:
708 wname_in_long_name = false;
709 kcname_in_long_name = true;
710 break;
711 case snd_soc_dapm_mux:
712 case snd_soc_dapm_virt_mux:
713 case snd_soc_dapm_value_mux:
714 wname_in_long_name = true;
715 kcname_in_long_name = false;
716 break;
717 default:
718 return -EINVAL;
719 }
720 }
721
722 if (wname_in_long_name && kcname_in_long_name) {
723 /*
724 * The control will get a prefix from the control
725 * creation process but we're also using the same
726 * prefix for widgets so cut the prefix off the
727 * front of the widget name.
728 */
729 long_name = kasprintf(GFP_KERNEL, "%s %s",
730 w->name + prefix_len,
731 w->kcontrol_news[kci].name);
732 if (long_name == NULL)
733 return -ENOMEM;
734
735 name = long_name;
736 } else if (wname_in_long_name) {
737 long_name = NULL;
738 name = w->name + prefix_len;
739 } else {
740 long_name = NULL;
741 name = w->kcontrol_news[kci].name;
742 }
743
744 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
745 prefix);
746 kfree(long_name);
747 if (!kcontrol)
748 return -ENOMEM;
749 kcontrol->private_free = dapm_kcontrol_free;
750
751 ret = dapm_kcontrol_data_alloc(w, kcontrol);
752 if (ret) {
753 snd_ctl_free_one(kcontrol);
754 return ret;
755 }
756
757 ret = snd_ctl_add(card, kcontrol);
758 if (ret < 0) {
759 dev_err(dapm->dev,
760 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
761 w->name, name, ret);
762 return ret;
763 }
764 }
765
766 ret = dapm_kcontrol_add_widget(kcontrol, w);
767 if (ret)
768 return ret;
769
770 w->kcontrols[kci] = kcontrol;
771
772 return 0;
773 }
774
775 /* create new dapm mixer control */
776 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
777 {
778 int i, ret;
779 struct snd_soc_dapm_path *path;
780
781 /* add kcontrol */
782 for (i = 0; i < w->num_kcontrols; i++) {
783 /* match name */
784 list_for_each_entry(path, &w->sources, list_sink) {
785 /* mixer/mux paths name must match control name */
786 if (path->name != (char *)w->kcontrol_news[i].name)
787 continue;
788
789 if (w->kcontrols[i]) {
790 dapm_kcontrol_add_path(w->kcontrols[i], path);
791 continue;
792 }
793
794 ret = dapm_create_or_share_mixmux_kcontrol(w, i);
795 if (ret < 0)
796 return ret;
797
798 dapm_kcontrol_add_path(w->kcontrols[i], path);
799 }
800 }
801
802 return 0;
803 }
804
805 /* create new dapm mux control */
806 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
807 {
808 struct snd_soc_dapm_context *dapm = w->dapm;
809 struct snd_soc_dapm_path *path;
810 int ret;
811
812 if (w->num_kcontrols != 1) {
813 dev_err(dapm->dev,
814 "ASoC: mux %s has incorrect number of controls\n",
815 w->name);
816 return -EINVAL;
817 }
818
819 if (list_empty(&w->sources)) {
820 dev_err(dapm->dev, "ASoC: mux %s has no paths\n", w->name);
821 return -EINVAL;
822 }
823
824 ret = dapm_create_or_share_mixmux_kcontrol(w, 0);
825 if (ret < 0)
826 return ret;
827
828 list_for_each_entry(path, &w->sources, list_sink)
829 dapm_kcontrol_add_path(w->kcontrols[0], path);
830
831 return 0;
832 }
833
834 /* create new dapm volume control */
835 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
836 {
837 if (w->num_kcontrols)
838 dev_err(w->dapm->dev,
839 "ASoC: PGA controls not supported: '%s'\n", w->name);
840
841 return 0;
842 }
843
844 /* reset 'walked' bit for each dapm path */
845 static void dapm_clear_walk_output(struct snd_soc_dapm_context *dapm,
846 struct list_head *sink)
847 {
848 struct snd_soc_dapm_path *p;
849
850 list_for_each_entry(p, sink, list_source) {
851 if (p->walked) {
852 p->walked = 0;
853 dapm_clear_walk_output(dapm, &p->sink->sinks);
854 }
855 }
856 }
857
858 static void dapm_clear_walk_input(struct snd_soc_dapm_context *dapm,
859 struct list_head *source)
860 {
861 struct snd_soc_dapm_path *p;
862
863 list_for_each_entry(p, source, list_sink) {
864 if (p->walked) {
865 p->walked = 0;
866 dapm_clear_walk_input(dapm, &p->source->sources);
867 }
868 }
869 }
870
871
872 /* We implement power down on suspend by checking the power state of
873 * the ALSA card - when we are suspending the ALSA state for the card
874 * is set to D3.
875 */
876 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
877 {
878 int level = snd_power_get_state(widget->dapm->card->snd_card);
879
880 switch (level) {
881 case SNDRV_CTL_POWER_D3hot:
882 case SNDRV_CTL_POWER_D3cold:
883 if (widget->ignore_suspend)
884 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
885 widget->name);
886 return widget->ignore_suspend;
887 default:
888 return 1;
889 }
890 }
891
892 /* add widget to list if it's not already in the list */
893 static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list,
894 struct snd_soc_dapm_widget *w)
895 {
896 struct snd_soc_dapm_widget_list *wlist;
897 int wlistsize, wlistentries, i;
898
899 if (*list == NULL)
900 return -EINVAL;
901
902 wlist = *list;
903
904 /* is this widget already in the list */
905 for (i = 0; i < wlist->num_widgets; i++) {
906 if (wlist->widgets[i] == w)
907 return 0;
908 }
909
910 /* allocate some new space */
911 wlistentries = wlist->num_widgets + 1;
912 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
913 wlistentries * sizeof(struct snd_soc_dapm_widget *);
914 *list = krealloc(wlist, wlistsize, GFP_KERNEL);
915 if (*list == NULL) {
916 dev_err(w->dapm->dev, "ASoC: can't allocate widget list for %s\n",
917 w->name);
918 return -ENOMEM;
919 }
920 wlist = *list;
921
922 /* insert the widget */
923 dev_dbg(w->dapm->dev, "ASoC: added %s in widget list pos %d\n",
924 w->name, wlist->num_widgets);
925
926 wlist->widgets[wlist->num_widgets] = w;
927 wlist->num_widgets++;
928 return 1;
929 }
930
931 /*
932 * Recursively check for a completed path to an active or physically connected
933 * output widget. Returns number of complete paths.
934 */
935 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
936 struct snd_soc_dapm_widget_list **list)
937 {
938 struct snd_soc_dapm_path *path;
939 int con = 0;
940
941 if (widget->outputs >= 0)
942 return widget->outputs;
943
944 DAPM_UPDATE_STAT(widget, path_checks);
945
946 switch (widget->id) {
947 case snd_soc_dapm_supply:
948 case snd_soc_dapm_regulator_supply:
949 case snd_soc_dapm_clock_supply:
950 case snd_soc_dapm_kcontrol:
951 return 0;
952 default:
953 break;
954 }
955
956 switch (widget->id) {
957 case snd_soc_dapm_adc:
958 case snd_soc_dapm_aif_out:
959 case snd_soc_dapm_dai_out:
960 if (widget->active) {
961 widget->outputs = snd_soc_dapm_suspend_check(widget);
962 return widget->outputs;
963 }
964 default:
965 break;
966 }
967
968 if (widget->connected) {
969 /* connected pin ? */
970 if (widget->id == snd_soc_dapm_output && !widget->ext) {
971 widget->outputs = snd_soc_dapm_suspend_check(widget);
972 return widget->outputs;
973 }
974
975 /* connected jack or spk ? */
976 if (widget->id == snd_soc_dapm_hp ||
977 widget->id == snd_soc_dapm_spk ||
978 (widget->id == snd_soc_dapm_line &&
979 !list_empty(&widget->sources))) {
980 widget->outputs = snd_soc_dapm_suspend_check(widget);
981 return widget->outputs;
982 }
983 }
984
985 list_for_each_entry(path, &widget->sinks, list_source) {
986 DAPM_UPDATE_STAT(widget, neighbour_checks);
987
988 if (path->weak)
989 continue;
990
991 if (path->walking)
992 return 1;
993
994 if (path->walked)
995 continue;
996
997 trace_snd_soc_dapm_output_path(widget, path);
998
999 if (path->sink && path->connect) {
1000 path->walked = 1;
1001 path->walking = 1;
1002
1003 /* do we need to add this widget to the list ? */
1004 if (list) {
1005 int err;
1006 err = dapm_list_add_widget(list, path->sink);
1007 if (err < 0) {
1008 dev_err(widget->dapm->dev,
1009 "ASoC: could not add widget %s\n",
1010 widget->name);
1011 path->walking = 0;
1012 return con;
1013 }
1014 }
1015
1016 con += is_connected_output_ep(path->sink, list);
1017
1018 path->walking = 0;
1019 }
1020 }
1021
1022 widget->outputs = con;
1023
1024 return con;
1025 }
1026
1027 /*
1028 * Recursively check for a completed path to an active or physically connected
1029 * input widget. Returns number of complete paths.
1030 */
1031 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
1032 struct snd_soc_dapm_widget_list **list)
1033 {
1034 struct snd_soc_dapm_path *path;
1035 int con = 0;
1036
1037 if (widget->inputs >= 0)
1038 return widget->inputs;
1039
1040 DAPM_UPDATE_STAT(widget, path_checks);
1041
1042 switch (widget->id) {
1043 case snd_soc_dapm_supply:
1044 case snd_soc_dapm_regulator_supply:
1045 case snd_soc_dapm_clock_supply:
1046 case snd_soc_dapm_kcontrol:
1047 return 0;
1048 default:
1049 break;
1050 }
1051
1052 /* active stream ? */
1053 switch (widget->id) {
1054 case snd_soc_dapm_dac:
1055 case snd_soc_dapm_aif_in:
1056 case snd_soc_dapm_dai_in:
1057 if (widget->active) {
1058 widget->inputs = snd_soc_dapm_suspend_check(widget);
1059 return widget->inputs;
1060 }
1061 default:
1062 break;
1063 }
1064
1065 if (widget->connected) {
1066 /* connected pin ? */
1067 if (widget->id == snd_soc_dapm_input && !widget->ext) {
1068 widget->inputs = snd_soc_dapm_suspend_check(widget);
1069 return widget->inputs;
1070 }
1071
1072 /* connected VMID/Bias for lower pops */
1073 if (widget->id == snd_soc_dapm_vmid) {
1074 widget->inputs = snd_soc_dapm_suspend_check(widget);
1075 return widget->inputs;
1076 }
1077
1078 /* connected jack ? */
1079 if (widget->id == snd_soc_dapm_mic ||
1080 (widget->id == snd_soc_dapm_line &&
1081 !list_empty(&widget->sinks))) {
1082 widget->inputs = snd_soc_dapm_suspend_check(widget);
1083 return widget->inputs;
1084 }
1085
1086 /* signal generator */
1087 if (widget->id == snd_soc_dapm_siggen) {
1088 widget->inputs = snd_soc_dapm_suspend_check(widget);
1089 return widget->inputs;
1090 }
1091 }
1092
1093 list_for_each_entry(path, &widget->sources, list_sink) {
1094 DAPM_UPDATE_STAT(widget, neighbour_checks);
1095
1096 if (path->weak)
1097 continue;
1098
1099 if (path->walking)
1100 return 1;
1101
1102 if (path->walked)
1103 continue;
1104
1105 trace_snd_soc_dapm_input_path(widget, path);
1106
1107 if (path->source && path->connect) {
1108 path->walked = 1;
1109 path->walking = 1;
1110
1111 /* do we need to add this widget to the list ? */
1112 if (list) {
1113 int err;
1114 err = dapm_list_add_widget(list, path->source);
1115 if (err < 0) {
1116 dev_err(widget->dapm->dev,
1117 "ASoC: could not add widget %s\n",
1118 widget->name);
1119 path->walking = 0;
1120 return con;
1121 }
1122 }
1123
1124 con += is_connected_input_ep(path->source, list);
1125
1126 path->walking = 0;
1127 }
1128 }
1129
1130 widget->inputs = con;
1131
1132 return con;
1133 }
1134
1135 /**
1136 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1137 * @dai: the soc DAI.
1138 * @stream: stream direction.
1139 * @list: list of active widgets for this stream.
1140 *
1141 * Queries DAPM graph as to whether an valid audio stream path exists for
1142 * the initial stream specified by name. This takes into account
1143 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1144 *
1145 * Returns the number of valid paths or negative error.
1146 */
1147 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1148 struct snd_soc_dapm_widget_list **list)
1149 {
1150 struct snd_soc_card *card = dai->card;
1151 int paths;
1152
1153 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1154 dapm_reset(card);
1155
1156 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1157 paths = is_connected_output_ep(dai->playback_widget, list);
1158 dapm_clear_walk_output(&card->dapm,
1159 &dai->playback_widget->sinks);
1160 } else {
1161 paths = is_connected_input_ep(dai->capture_widget, list);
1162 dapm_clear_walk_input(&card->dapm,
1163 &dai->capture_widget->sources);
1164 }
1165
1166 trace_snd_soc_dapm_connected(paths, stream);
1167 mutex_unlock(&card->dapm_mutex);
1168
1169 return paths;
1170 }
1171
1172 /*
1173 * Handler for generic register modifier widget.
1174 */
1175 int dapm_reg_event(struct snd_soc_dapm_widget *w,
1176 struct snd_kcontrol *kcontrol, int event)
1177 {
1178 unsigned int val;
1179
1180 if (SND_SOC_DAPM_EVENT_ON(event))
1181 val = w->on_val;
1182 else
1183 val = w->off_val;
1184
1185 soc_widget_update_bits_locked(w, -(w->reg + 1),
1186 w->mask << w->shift, val << w->shift);
1187
1188 return 0;
1189 }
1190 EXPORT_SYMBOL_GPL(dapm_reg_event);
1191
1192 /*
1193 * Handler for regulator supply widget.
1194 */
1195 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1196 struct snd_kcontrol *kcontrol, int event)
1197 {
1198 int ret;
1199
1200 if (SND_SOC_DAPM_EVENT_ON(event)) {
1201 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1202 ret = regulator_allow_bypass(w->regulator, false);
1203 if (ret != 0)
1204 dev_warn(w->dapm->dev,
1205 "ASoC: Failed to bypass %s: %d\n",
1206 w->name, ret);
1207 }
1208
1209 return regulator_enable(w->regulator);
1210 } else {
1211 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1212 ret = regulator_allow_bypass(w->regulator, true);
1213 if (ret != 0)
1214 dev_warn(w->dapm->dev,
1215 "ASoC: Failed to unbypass %s: %d\n",
1216 w->name, ret);
1217 }
1218
1219 return regulator_disable_deferred(w->regulator, w->shift);
1220 }
1221 }
1222 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1223
1224 /*
1225 * Handler for clock supply widget.
1226 */
1227 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1228 struct snd_kcontrol *kcontrol, int event)
1229 {
1230 if (!w->clk)
1231 return -EIO;
1232
1233 #ifdef CONFIG_HAVE_CLK
1234 if (SND_SOC_DAPM_EVENT_ON(event)) {
1235 return clk_prepare_enable(w->clk);
1236 } else {
1237 clk_disable_unprepare(w->clk);
1238 return 0;
1239 }
1240 #endif
1241 return 0;
1242 }
1243 EXPORT_SYMBOL_GPL(dapm_clock_event);
1244
1245 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1246 {
1247 if (w->power_checked)
1248 return w->new_power;
1249
1250 if (w->force)
1251 w->new_power = 1;
1252 else
1253 w->new_power = w->power_check(w);
1254
1255 w->power_checked = true;
1256
1257 return w->new_power;
1258 }
1259
1260 /* Generic check to see if a widget should be powered.
1261 */
1262 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1263 {
1264 int in, out;
1265
1266 DAPM_UPDATE_STAT(w, power_checks);
1267
1268 in = is_connected_input_ep(w, NULL);
1269 dapm_clear_walk_input(w->dapm, &w->sources);
1270 out = is_connected_output_ep(w, NULL);
1271 dapm_clear_walk_output(w->dapm, &w->sinks);
1272 return out != 0 && in != 0;
1273 }
1274
1275 /* Check to see if an ADC has power */
1276 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
1277 {
1278 int in;
1279
1280 DAPM_UPDATE_STAT(w, power_checks);
1281
1282 if (w->active) {
1283 in = is_connected_input_ep(w, NULL);
1284 dapm_clear_walk_input(w->dapm, &w->sources);
1285 return in != 0;
1286 } else {
1287 return dapm_generic_check_power(w);
1288 }
1289 }
1290
1291 /* Check to see if a DAC has power */
1292 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
1293 {
1294 int out;
1295
1296 DAPM_UPDATE_STAT(w, power_checks);
1297
1298 if (w->active) {
1299 out = is_connected_output_ep(w, NULL);
1300 dapm_clear_walk_output(w->dapm, &w->sinks);
1301 return out != 0;
1302 } else {
1303 return dapm_generic_check_power(w);
1304 }
1305 }
1306
1307 /* Check to see if a power supply is needed */
1308 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1309 {
1310 struct snd_soc_dapm_path *path;
1311
1312 DAPM_UPDATE_STAT(w, power_checks);
1313
1314 /* Check if one of our outputs is connected */
1315 list_for_each_entry(path, &w->sinks, list_source) {
1316 DAPM_UPDATE_STAT(w, neighbour_checks);
1317
1318 if (path->weak)
1319 continue;
1320
1321 if (path->connected &&
1322 !path->connected(path->source, path->sink))
1323 continue;
1324
1325 if (!path->sink)
1326 continue;
1327
1328 if (dapm_widget_power_check(path->sink))
1329 return 1;
1330 }
1331
1332 return 0;
1333 }
1334
1335 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1336 {
1337 return 1;
1338 }
1339
1340 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1341 struct snd_soc_dapm_widget *b,
1342 bool power_up)
1343 {
1344 int *sort;
1345
1346 if (power_up)
1347 sort = dapm_up_seq;
1348 else
1349 sort = dapm_down_seq;
1350
1351 if (sort[a->id] != sort[b->id])
1352 return sort[a->id] - sort[b->id];
1353 if (a->subseq != b->subseq) {
1354 if (power_up)
1355 return a->subseq - b->subseq;
1356 else
1357 return b->subseq - a->subseq;
1358 }
1359 if (a->reg != b->reg)
1360 return a->reg - b->reg;
1361 if (a->dapm != b->dapm)
1362 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1363
1364 return 0;
1365 }
1366
1367 /* Insert a widget in order into a DAPM power sequence. */
1368 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1369 struct list_head *list,
1370 bool power_up)
1371 {
1372 struct snd_soc_dapm_widget *w;
1373
1374 list_for_each_entry(w, list, power_list)
1375 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1376 list_add_tail(&new_widget->power_list, &w->power_list);
1377 return;
1378 }
1379
1380 list_add_tail(&new_widget->power_list, list);
1381 }
1382
1383 static void dapm_seq_check_event(struct snd_soc_card *card,
1384 struct snd_soc_dapm_widget *w, int event)
1385 {
1386 const char *ev_name;
1387 int power, ret;
1388
1389 switch (event) {
1390 case SND_SOC_DAPM_PRE_PMU:
1391 ev_name = "PRE_PMU";
1392 power = 1;
1393 break;
1394 case SND_SOC_DAPM_POST_PMU:
1395 ev_name = "POST_PMU";
1396 power = 1;
1397 break;
1398 case SND_SOC_DAPM_PRE_PMD:
1399 ev_name = "PRE_PMD";
1400 power = 0;
1401 break;
1402 case SND_SOC_DAPM_POST_PMD:
1403 ev_name = "POST_PMD";
1404 power = 0;
1405 break;
1406 case SND_SOC_DAPM_WILL_PMU:
1407 ev_name = "WILL_PMU";
1408 power = 1;
1409 break;
1410 case SND_SOC_DAPM_WILL_PMD:
1411 ev_name = "WILL_PMD";
1412 power = 0;
1413 break;
1414 default:
1415 BUG();
1416 return;
1417 }
1418
1419 if (w->new_power != power)
1420 return;
1421
1422 if (w->event && (w->event_flags & event)) {
1423 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1424 w->name, ev_name);
1425 trace_snd_soc_dapm_widget_event_start(w, event);
1426 ret = w->event(w, NULL, event);
1427 trace_snd_soc_dapm_widget_event_done(w, event);
1428 if (ret < 0)
1429 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1430 ev_name, w->name, ret);
1431 }
1432 }
1433
1434 /* Apply the coalesced changes from a DAPM sequence */
1435 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1436 struct list_head *pending)
1437 {
1438 struct snd_soc_dapm_widget *w;
1439 int reg;
1440 unsigned int value = 0;
1441 unsigned int mask = 0;
1442
1443 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1444 power_list)->reg;
1445
1446 list_for_each_entry(w, pending, power_list) {
1447 BUG_ON(reg != w->reg);
1448 w->power = w->new_power;
1449
1450 mask |= w->mask << w->shift;
1451 if (w->power)
1452 value |= w->on_val << w->shift;
1453 else
1454 value |= w->off_val << w->shift;
1455
1456 pop_dbg(w->dapm->dev, card->pop_time,
1457 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1458 w->name, reg, value, mask);
1459
1460 /* Check for events */
1461 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1462 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1463 }
1464
1465 if (reg >= 0) {
1466 /* Any widget will do, they should all be updating the
1467 * same register.
1468 */
1469 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1470 power_list);
1471
1472 pop_dbg(w->dapm->dev, card->pop_time,
1473 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1474 value, mask, reg, card->pop_time);
1475 pop_wait(card->pop_time);
1476 soc_widget_update_bits_locked(w, reg, mask, value);
1477 }
1478
1479 list_for_each_entry(w, pending, power_list) {
1480 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1481 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1482 }
1483 }
1484
1485 /* Apply a DAPM power sequence.
1486 *
1487 * We walk over a pre-sorted list of widgets to apply power to. In
1488 * order to minimise the number of writes to the device required
1489 * multiple widgets will be updated in a single write where possible.
1490 * Currently anything that requires more than a single write is not
1491 * handled.
1492 */
1493 static void dapm_seq_run(struct snd_soc_card *card,
1494 struct list_head *list, int event, bool power_up)
1495 {
1496 struct snd_soc_dapm_widget *w, *n;
1497 LIST_HEAD(pending);
1498 int cur_sort = -1;
1499 int cur_subseq = -1;
1500 int cur_reg = SND_SOC_NOPM;
1501 struct snd_soc_dapm_context *cur_dapm = NULL;
1502 int ret, i;
1503 int *sort;
1504
1505 if (power_up)
1506 sort = dapm_up_seq;
1507 else
1508 sort = dapm_down_seq;
1509
1510 list_for_each_entry_safe(w, n, list, power_list) {
1511 ret = 0;
1512
1513 /* Do we need to apply any queued changes? */
1514 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1515 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1516 if (!list_empty(&pending))
1517 dapm_seq_run_coalesced(card, &pending);
1518
1519 if (cur_dapm && cur_dapm->seq_notifier) {
1520 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1521 if (sort[i] == cur_sort)
1522 cur_dapm->seq_notifier(cur_dapm,
1523 i,
1524 cur_subseq);
1525 }
1526
1527 INIT_LIST_HEAD(&pending);
1528 cur_sort = -1;
1529 cur_subseq = INT_MIN;
1530 cur_reg = SND_SOC_NOPM;
1531 cur_dapm = NULL;
1532 }
1533
1534 switch (w->id) {
1535 case snd_soc_dapm_pre:
1536 if (!w->event)
1537 list_for_each_entry_safe_continue(w, n, list,
1538 power_list);
1539
1540 if (event == SND_SOC_DAPM_STREAM_START)
1541 ret = w->event(w,
1542 NULL, SND_SOC_DAPM_PRE_PMU);
1543 else if (event == SND_SOC_DAPM_STREAM_STOP)
1544 ret = w->event(w,
1545 NULL, SND_SOC_DAPM_PRE_PMD);
1546 break;
1547
1548 case snd_soc_dapm_post:
1549 if (!w->event)
1550 list_for_each_entry_safe_continue(w, n, list,
1551 power_list);
1552
1553 if (event == SND_SOC_DAPM_STREAM_START)
1554 ret = w->event(w,
1555 NULL, SND_SOC_DAPM_POST_PMU);
1556 else if (event == SND_SOC_DAPM_STREAM_STOP)
1557 ret = w->event(w,
1558 NULL, SND_SOC_DAPM_POST_PMD);
1559 break;
1560
1561 default:
1562 /* Queue it up for application */
1563 cur_sort = sort[w->id];
1564 cur_subseq = w->subseq;
1565 cur_reg = w->reg;
1566 cur_dapm = w->dapm;
1567 list_move(&w->power_list, &pending);
1568 break;
1569 }
1570
1571 if (ret < 0)
1572 dev_err(w->dapm->dev,
1573 "ASoC: Failed to apply widget power: %d\n", ret);
1574 }
1575
1576 if (!list_empty(&pending))
1577 dapm_seq_run_coalesced(card, &pending);
1578
1579 if (cur_dapm && cur_dapm->seq_notifier) {
1580 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1581 if (sort[i] == cur_sort)
1582 cur_dapm->seq_notifier(cur_dapm,
1583 i, cur_subseq);
1584 }
1585 }
1586
1587 static void dapm_widget_update(struct snd_soc_card *card)
1588 {
1589 struct snd_soc_dapm_update *update = card->update;
1590 struct snd_soc_dapm_widget_list *wlist;
1591 struct snd_soc_dapm_widget *w = NULL;
1592 unsigned int wi;
1593 int ret;
1594
1595 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1596 return;
1597
1598 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1599
1600 for (wi = 0; wi < wlist->num_widgets; wi++) {
1601 w = wlist->widgets[wi];
1602
1603 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1604 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1605 if (ret != 0)
1606 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1607 w->name, ret);
1608 }
1609 }
1610
1611 if (!w)
1612 return;
1613
1614 ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
1615 update->val);
1616 if (ret < 0)
1617 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1618 w->name, ret);
1619
1620 for (wi = 0; wi < wlist->num_widgets; wi++) {
1621 w = wlist->widgets[wi];
1622
1623 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1624 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1625 if (ret != 0)
1626 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1627 w->name, ret);
1628 }
1629 }
1630 }
1631
1632 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1633 * they're changing state.
1634 */
1635 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1636 {
1637 struct snd_soc_dapm_context *d = data;
1638 int ret;
1639
1640 /* If we're off and we're not supposed to be go into STANDBY */
1641 if (d->bias_level == SND_SOC_BIAS_OFF &&
1642 d->target_bias_level != SND_SOC_BIAS_OFF) {
1643 if (d->dev)
1644 pm_runtime_get_sync(d->dev);
1645
1646 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1647 if (ret != 0)
1648 dev_err(d->dev,
1649 "ASoC: Failed to turn on bias: %d\n", ret);
1650 }
1651
1652 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1653 if (d->bias_level != d->target_bias_level) {
1654 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1655 if (ret != 0)
1656 dev_err(d->dev,
1657 "ASoC: Failed to prepare bias: %d\n", ret);
1658 }
1659 }
1660
1661 /* Async callback run prior to DAPM sequences - brings to their final
1662 * state.
1663 */
1664 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1665 {
1666 struct snd_soc_dapm_context *d = data;
1667 int ret;
1668
1669 /* If we just powered the last thing off drop to standby bias */
1670 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1671 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1672 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1673 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1674 if (ret != 0)
1675 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1676 ret);
1677 }
1678
1679 /* If we're in standby and can support bias off then do that */
1680 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1681 d->target_bias_level == SND_SOC_BIAS_OFF) {
1682 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1683 if (ret != 0)
1684 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1685 ret);
1686
1687 if (d->dev)
1688 pm_runtime_put(d->dev);
1689 }
1690
1691 /* If we just powered up then move to active bias */
1692 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1693 d->target_bias_level == SND_SOC_BIAS_ON) {
1694 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1695 if (ret != 0)
1696 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1697 ret);
1698 }
1699 }
1700
1701 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1702 bool power, bool connect)
1703 {
1704 /* If a connection is being made or broken then that update
1705 * will have marked the peer dirty, otherwise the widgets are
1706 * not connected and this update has no impact. */
1707 if (!connect)
1708 return;
1709
1710 /* If the peer is already in the state we're moving to then we
1711 * won't have an impact on it. */
1712 if (power != peer->power)
1713 dapm_mark_dirty(peer, "peer state change");
1714 }
1715
1716 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1717 struct list_head *up_list,
1718 struct list_head *down_list)
1719 {
1720 struct snd_soc_dapm_path *path;
1721
1722 if (w->power == power)
1723 return;
1724
1725 trace_snd_soc_dapm_widget_power(w, power);
1726
1727 /* If we changed our power state perhaps our neigbours changed
1728 * also.
1729 */
1730 list_for_each_entry(path, &w->sources, list_sink) {
1731 if (path->source) {
1732 dapm_widget_set_peer_power(path->source, power,
1733 path->connect);
1734 }
1735 }
1736 switch (w->id) {
1737 case snd_soc_dapm_supply:
1738 case snd_soc_dapm_regulator_supply:
1739 case snd_soc_dapm_clock_supply:
1740 case snd_soc_dapm_kcontrol:
1741 /* Supplies can't affect their outputs, only their inputs */
1742 break;
1743 default:
1744 list_for_each_entry(path, &w->sinks, list_source) {
1745 if (path->sink) {
1746 dapm_widget_set_peer_power(path->sink, power,
1747 path->connect);
1748 }
1749 }
1750 break;
1751 }
1752
1753 if (power)
1754 dapm_seq_insert(w, up_list, true);
1755 else
1756 dapm_seq_insert(w, down_list, false);
1757 }
1758
1759 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1760 struct list_head *up_list,
1761 struct list_head *down_list)
1762 {
1763 int power;
1764
1765 switch (w->id) {
1766 case snd_soc_dapm_pre:
1767 dapm_seq_insert(w, down_list, false);
1768 break;
1769 case snd_soc_dapm_post:
1770 dapm_seq_insert(w, up_list, true);
1771 break;
1772
1773 default:
1774 power = dapm_widget_power_check(w);
1775
1776 dapm_widget_set_power(w, power, up_list, down_list);
1777 break;
1778 }
1779 }
1780
1781 /*
1782 * Scan each dapm widget for complete audio path.
1783 * A complete path is a route that has valid endpoints i.e.:-
1784 *
1785 * o DAC to output pin.
1786 * o Input Pin to ADC.
1787 * o Input pin to Output pin (bypass, sidetone)
1788 * o DAC to ADC (loopback).
1789 */
1790 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1791 {
1792 struct snd_soc_dapm_widget *w;
1793 struct snd_soc_dapm_context *d;
1794 LIST_HEAD(up_list);
1795 LIST_HEAD(down_list);
1796 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1797 enum snd_soc_bias_level bias;
1798
1799 trace_snd_soc_dapm_start(card);
1800
1801 list_for_each_entry(d, &card->dapm_list, list) {
1802 if (d->idle_bias_off)
1803 d->target_bias_level = SND_SOC_BIAS_OFF;
1804 else
1805 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1806 }
1807
1808 dapm_reset(card);
1809
1810 /* Check which widgets we need to power and store them in
1811 * lists indicating if they should be powered up or down. We
1812 * only check widgets that have been flagged as dirty but note
1813 * that new widgets may be added to the dirty list while we
1814 * iterate.
1815 */
1816 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1817 dapm_power_one_widget(w, &up_list, &down_list);
1818 }
1819
1820 list_for_each_entry(w, &card->widgets, list) {
1821 switch (w->id) {
1822 case snd_soc_dapm_pre:
1823 case snd_soc_dapm_post:
1824 /* These widgets always need to be powered */
1825 break;
1826 default:
1827 list_del_init(&w->dirty);
1828 break;
1829 }
1830
1831 if (w->new_power) {
1832 d = w->dapm;
1833
1834 /* Supplies and micbiases only bring the
1835 * context up to STANDBY as unless something
1836 * else is active and passing audio they
1837 * generally don't require full power. Signal
1838 * generators are virtual pins and have no
1839 * power impact themselves.
1840 */
1841 switch (w->id) {
1842 case snd_soc_dapm_siggen:
1843 break;
1844 case snd_soc_dapm_supply:
1845 case snd_soc_dapm_regulator_supply:
1846 case snd_soc_dapm_clock_supply:
1847 case snd_soc_dapm_micbias:
1848 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1849 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1850 break;
1851 default:
1852 d->target_bias_level = SND_SOC_BIAS_ON;
1853 break;
1854 }
1855 }
1856
1857 }
1858
1859 /* Force all contexts in the card to the same bias state if
1860 * they're not ground referenced.
1861 */
1862 bias = SND_SOC_BIAS_OFF;
1863 list_for_each_entry(d, &card->dapm_list, list)
1864 if (d->target_bias_level > bias)
1865 bias = d->target_bias_level;
1866 list_for_each_entry(d, &card->dapm_list, list)
1867 if (!d->idle_bias_off)
1868 d->target_bias_level = bias;
1869
1870 trace_snd_soc_dapm_walk_done(card);
1871
1872 /* Run all the bias changes in parallel */
1873 list_for_each_entry(d, &card->dapm_list, list)
1874 async_schedule_domain(dapm_pre_sequence_async, d,
1875 &async_domain);
1876 async_synchronize_full_domain(&async_domain);
1877
1878 list_for_each_entry(w, &down_list, power_list) {
1879 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
1880 }
1881
1882 list_for_each_entry(w, &up_list, power_list) {
1883 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
1884 }
1885
1886 /* Power down widgets first; try to avoid amplifying pops. */
1887 dapm_seq_run(card, &down_list, event, false);
1888
1889 dapm_widget_update(card);
1890
1891 /* Now power up. */
1892 dapm_seq_run(card, &up_list, event, true);
1893
1894 /* Run all the bias changes in parallel */
1895 list_for_each_entry(d, &card->dapm_list, list)
1896 async_schedule_domain(dapm_post_sequence_async, d,
1897 &async_domain);
1898 async_synchronize_full_domain(&async_domain);
1899
1900 /* do we need to notify any clients that DAPM event is complete */
1901 list_for_each_entry(d, &card->dapm_list, list) {
1902 if (d->stream_event)
1903 d->stream_event(d, event);
1904 }
1905
1906 pop_dbg(card->dev, card->pop_time,
1907 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1908 pop_wait(card->pop_time);
1909
1910 trace_snd_soc_dapm_done(card);
1911
1912 return 0;
1913 }
1914
1915 #ifdef CONFIG_DEBUG_FS
1916 static ssize_t dapm_widget_power_read_file(struct file *file,
1917 char __user *user_buf,
1918 size_t count, loff_t *ppos)
1919 {
1920 struct snd_soc_dapm_widget *w = file->private_data;
1921 char *buf;
1922 int in, out;
1923 ssize_t ret;
1924 struct snd_soc_dapm_path *p = NULL;
1925
1926 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1927 if (!buf)
1928 return -ENOMEM;
1929
1930 in = is_connected_input_ep(w, NULL);
1931 dapm_clear_walk_input(w->dapm, &w->sources);
1932 out = is_connected_output_ep(w, NULL);
1933 dapm_clear_walk_output(w->dapm, &w->sinks);
1934
1935 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1936 w->name, w->power ? "On" : "Off",
1937 w->force ? " (forced)" : "", in, out);
1938
1939 if (w->reg >= 0)
1940 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1941 " - R%d(0x%x) mask 0x%x",
1942 w->reg, w->reg, w->mask << w->shift);
1943
1944 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1945
1946 if (w->sname)
1947 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1948 w->sname,
1949 w->active ? "active" : "inactive");
1950
1951 list_for_each_entry(p, &w->sources, list_sink) {
1952 if (p->connected && !p->connected(w, p->source))
1953 continue;
1954
1955 if (p->connect)
1956 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1957 " in \"%s\" \"%s\"\n",
1958 p->name ? p->name : "static",
1959 p->source->name);
1960 }
1961 list_for_each_entry(p, &w->sinks, list_source) {
1962 if (p->connected && !p->connected(w, p->sink))
1963 continue;
1964
1965 if (p->connect)
1966 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1967 " out \"%s\" \"%s\"\n",
1968 p->name ? p->name : "static",
1969 p->sink->name);
1970 }
1971
1972 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1973
1974 kfree(buf);
1975 return ret;
1976 }
1977
1978 static const struct file_operations dapm_widget_power_fops = {
1979 .open = simple_open,
1980 .read = dapm_widget_power_read_file,
1981 .llseek = default_llseek,
1982 };
1983
1984 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1985 size_t count, loff_t *ppos)
1986 {
1987 struct snd_soc_dapm_context *dapm = file->private_data;
1988 char *level;
1989
1990 switch (dapm->bias_level) {
1991 case SND_SOC_BIAS_ON:
1992 level = "On\n";
1993 break;
1994 case SND_SOC_BIAS_PREPARE:
1995 level = "Prepare\n";
1996 break;
1997 case SND_SOC_BIAS_STANDBY:
1998 level = "Standby\n";
1999 break;
2000 case SND_SOC_BIAS_OFF:
2001 level = "Off\n";
2002 break;
2003 default:
2004 BUG();
2005 level = "Unknown\n";
2006 break;
2007 }
2008
2009 return simple_read_from_buffer(user_buf, count, ppos, level,
2010 strlen(level));
2011 }
2012
2013 static const struct file_operations dapm_bias_fops = {
2014 .open = simple_open,
2015 .read = dapm_bias_read_file,
2016 .llseek = default_llseek,
2017 };
2018
2019 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2020 struct dentry *parent)
2021 {
2022 struct dentry *d;
2023
2024 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2025
2026 if (!dapm->debugfs_dapm) {
2027 dev_warn(dapm->dev,
2028 "ASoC: Failed to create DAPM debugfs directory\n");
2029 return;
2030 }
2031
2032 d = debugfs_create_file("bias_level", 0444,
2033 dapm->debugfs_dapm, dapm,
2034 &dapm_bias_fops);
2035 if (!d)
2036 dev_warn(dapm->dev,
2037 "ASoC: Failed to create bias level debugfs file\n");
2038 }
2039
2040 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2041 {
2042 struct snd_soc_dapm_context *dapm = w->dapm;
2043 struct dentry *d;
2044
2045 if (!dapm->debugfs_dapm || !w->name)
2046 return;
2047
2048 d = debugfs_create_file(w->name, 0444,
2049 dapm->debugfs_dapm, w,
2050 &dapm_widget_power_fops);
2051 if (!d)
2052 dev_warn(w->dapm->dev,
2053 "ASoC: Failed to create %s debugfs file\n",
2054 w->name);
2055 }
2056
2057 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2058 {
2059 debugfs_remove_recursive(dapm->debugfs_dapm);
2060 }
2061
2062 #else
2063 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2064 struct dentry *parent)
2065 {
2066 }
2067
2068 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2069 {
2070 }
2071
2072 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2073 {
2074 }
2075
2076 #endif
2077
2078 /* test and update the power status of a mux widget */
2079 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2080 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2081 {
2082 struct snd_soc_dapm_path *path;
2083 int found = 0;
2084
2085 /* find dapm widget path assoc with kcontrol */
2086 dapm_kcontrol_for_each_path(path, kcontrol) {
2087 if (!path->name || !e->texts[mux])
2088 continue;
2089
2090 found = 1;
2091 /* we now need to match the string in the enum to the path */
2092 if (!(strcmp(path->name, e->texts[mux]))) {
2093 path->connect = 1; /* new connection */
2094 dapm_mark_dirty(path->source, "mux connection");
2095 } else {
2096 if (path->connect)
2097 dapm_mark_dirty(path->source,
2098 "mux disconnection");
2099 path->connect = 0; /* old connection must be powered down */
2100 }
2101 dapm_mark_dirty(path->sink, "mux change");
2102 }
2103
2104 if (found)
2105 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2106
2107 return found;
2108 }
2109
2110 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2111 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2112 struct snd_soc_dapm_update *update)
2113 {
2114 struct snd_soc_card *card = dapm->card;
2115 int ret;
2116
2117 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2118 card->update = update;
2119 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2120 card->update = NULL;
2121 mutex_unlock(&card->dapm_mutex);
2122 if (ret > 0)
2123 soc_dpcm_runtime_update(card);
2124 return ret;
2125 }
2126 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2127
2128 /* test and update the power status of a mixer or switch widget */
2129 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2130 struct snd_kcontrol *kcontrol, int connect)
2131 {
2132 struct snd_soc_dapm_path *path;
2133 int found = 0;
2134
2135 /* find dapm widget path assoc with kcontrol */
2136 dapm_kcontrol_for_each_path(path, kcontrol) {
2137 found = 1;
2138 path->connect = connect;
2139 dapm_mark_dirty(path->source, "mixer connection");
2140 dapm_mark_dirty(path->sink, "mixer update");
2141 }
2142
2143 if (found)
2144 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2145
2146 return found;
2147 }
2148
2149 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2150 struct snd_kcontrol *kcontrol, int connect,
2151 struct snd_soc_dapm_update *update)
2152 {
2153 struct snd_soc_card *card = dapm->card;
2154 int ret;
2155
2156 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2157 card->update = update;
2158 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2159 card->update = NULL;
2160 mutex_unlock(&card->dapm_mutex);
2161 if (ret > 0)
2162 soc_dpcm_runtime_update(card);
2163 return ret;
2164 }
2165 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2166
2167 /* show dapm widget status in sys fs */
2168 static ssize_t dapm_widget_show(struct device *dev,
2169 struct device_attribute *attr, char *buf)
2170 {
2171 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2172 struct snd_soc_codec *codec =rtd->codec;
2173 struct snd_soc_dapm_widget *w;
2174 int count = 0;
2175 char *state = "not set";
2176
2177 list_for_each_entry(w, &codec->card->widgets, list) {
2178 if (w->dapm != &codec->dapm)
2179 continue;
2180
2181 /* only display widgets that burnm power */
2182 switch (w->id) {
2183 case snd_soc_dapm_hp:
2184 case snd_soc_dapm_mic:
2185 case snd_soc_dapm_spk:
2186 case snd_soc_dapm_line:
2187 case snd_soc_dapm_micbias:
2188 case snd_soc_dapm_dac:
2189 case snd_soc_dapm_adc:
2190 case snd_soc_dapm_pga:
2191 case snd_soc_dapm_out_drv:
2192 case snd_soc_dapm_mixer:
2193 case snd_soc_dapm_mixer_named_ctl:
2194 case snd_soc_dapm_supply:
2195 case snd_soc_dapm_regulator_supply:
2196 case snd_soc_dapm_clock_supply:
2197 if (w->name)
2198 count += sprintf(buf + count, "%s: %s\n",
2199 w->name, w->power ? "On":"Off");
2200 break;
2201 default:
2202 break;
2203 }
2204 }
2205
2206 switch (codec->dapm.bias_level) {
2207 case SND_SOC_BIAS_ON:
2208 state = "On";
2209 break;
2210 case SND_SOC_BIAS_PREPARE:
2211 state = "Prepare";
2212 break;
2213 case SND_SOC_BIAS_STANDBY:
2214 state = "Standby";
2215 break;
2216 case SND_SOC_BIAS_OFF:
2217 state = "Off";
2218 break;
2219 }
2220 count += sprintf(buf + count, "PM State: %s\n", state);
2221
2222 return count;
2223 }
2224
2225 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2226
2227 int snd_soc_dapm_sys_add(struct device *dev)
2228 {
2229 return device_create_file(dev, &dev_attr_dapm_widget);
2230 }
2231
2232 static void snd_soc_dapm_sys_remove(struct device *dev)
2233 {
2234 device_remove_file(dev, &dev_attr_dapm_widget);
2235 }
2236
2237 static void dapm_free_path(struct snd_soc_dapm_path *path)
2238 {
2239 list_del(&path->list_sink);
2240 list_del(&path->list_source);
2241 list_del(&path->list_kcontrol);
2242 list_del(&path->list);
2243 kfree(path);
2244 }
2245
2246 /* free all dapm widgets and resources */
2247 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2248 {
2249 struct snd_soc_dapm_widget *w, *next_w;
2250 struct snd_soc_dapm_path *p, *next_p;
2251
2252 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2253 if (w->dapm != dapm)
2254 continue;
2255 list_del(&w->list);
2256 /*
2257 * remove source and sink paths associated to this widget.
2258 * While removing the path, remove reference to it from both
2259 * source and sink widgets so that path is removed only once.
2260 */
2261 list_for_each_entry_safe(p, next_p, &w->sources, list_sink)
2262 dapm_free_path(p);
2263
2264 list_for_each_entry_safe(p, next_p, &w->sinks, list_source)
2265 dapm_free_path(p);
2266
2267 kfree(w->kcontrols);
2268 kfree(w->name);
2269 kfree(w);
2270 }
2271 }
2272
2273 static struct snd_soc_dapm_widget *dapm_find_widget(
2274 struct snd_soc_dapm_context *dapm, const char *pin,
2275 bool search_other_contexts)
2276 {
2277 struct snd_soc_dapm_widget *w;
2278 struct snd_soc_dapm_widget *fallback = NULL;
2279
2280 list_for_each_entry(w, &dapm->card->widgets, list) {
2281 if (!strcmp(w->name, pin)) {
2282 if (w->dapm == dapm)
2283 return w;
2284 else
2285 fallback = w;
2286 }
2287 }
2288
2289 if (search_other_contexts)
2290 return fallback;
2291
2292 return NULL;
2293 }
2294
2295 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2296 const char *pin, int status)
2297 {
2298 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2299
2300 if (!w) {
2301 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2302 return -EINVAL;
2303 }
2304
2305 if (w->connected != status)
2306 dapm_mark_dirty(w, "pin configuration");
2307
2308 w->connected = status;
2309 if (status == 0)
2310 w->force = 0;
2311
2312 return 0;
2313 }
2314
2315 /**
2316 * snd_soc_dapm_sync - scan and power dapm paths
2317 * @dapm: DAPM context
2318 *
2319 * Walks all dapm audio paths and powers widgets according to their
2320 * stream or path usage.
2321 *
2322 * Returns 0 for success.
2323 */
2324 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2325 {
2326 int ret;
2327
2328 /*
2329 * Suppress early reports (eg, jacks syncing their state) to avoid
2330 * silly DAPM runs during card startup.
2331 */
2332 if (!dapm->card || !dapm->card->instantiated)
2333 return 0;
2334
2335 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2336 ret = dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2337 mutex_unlock(&dapm->card->dapm_mutex);
2338 return ret;
2339 }
2340 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2341
2342 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2343 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2344 const char *control,
2345 int (*connected)(struct snd_soc_dapm_widget *source,
2346 struct snd_soc_dapm_widget *sink))
2347 {
2348 struct snd_soc_dapm_path *path;
2349 int ret;
2350
2351 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2352 if (!path)
2353 return -ENOMEM;
2354
2355 path->source = wsource;
2356 path->sink = wsink;
2357 path->connected = connected;
2358 INIT_LIST_HEAD(&path->list);
2359 INIT_LIST_HEAD(&path->list_kcontrol);
2360 INIT_LIST_HEAD(&path->list_source);
2361 INIT_LIST_HEAD(&path->list_sink);
2362
2363 /* check for external widgets */
2364 if (wsink->id == snd_soc_dapm_input) {
2365 if (wsource->id == snd_soc_dapm_micbias ||
2366 wsource->id == snd_soc_dapm_mic ||
2367 wsource->id == snd_soc_dapm_line ||
2368 wsource->id == snd_soc_dapm_output)
2369 wsink->ext = 1;
2370 }
2371 if (wsource->id == snd_soc_dapm_output) {
2372 if (wsink->id == snd_soc_dapm_spk ||
2373 wsink->id == snd_soc_dapm_hp ||
2374 wsink->id == snd_soc_dapm_line ||
2375 wsink->id == snd_soc_dapm_input)
2376 wsource->ext = 1;
2377 }
2378
2379 dapm_mark_dirty(wsource, "Route added");
2380 dapm_mark_dirty(wsink, "Route added");
2381
2382 /* connect static paths */
2383 if (control == NULL) {
2384 list_add(&path->list, &dapm->card->paths);
2385 list_add(&path->list_sink, &wsink->sources);
2386 list_add(&path->list_source, &wsource->sinks);
2387 path->connect = 1;
2388 return 0;
2389 }
2390
2391 /* connect dynamic paths */
2392 switch (wsink->id) {
2393 case snd_soc_dapm_adc:
2394 case snd_soc_dapm_dac:
2395 case snd_soc_dapm_pga:
2396 case snd_soc_dapm_out_drv:
2397 case snd_soc_dapm_input:
2398 case snd_soc_dapm_output:
2399 case snd_soc_dapm_siggen:
2400 case snd_soc_dapm_micbias:
2401 case snd_soc_dapm_vmid:
2402 case snd_soc_dapm_pre:
2403 case snd_soc_dapm_post:
2404 case snd_soc_dapm_supply:
2405 case snd_soc_dapm_regulator_supply:
2406 case snd_soc_dapm_clock_supply:
2407 case snd_soc_dapm_aif_in:
2408 case snd_soc_dapm_aif_out:
2409 case snd_soc_dapm_dai_in:
2410 case snd_soc_dapm_dai_out:
2411 case snd_soc_dapm_dai_link:
2412 case snd_soc_dapm_kcontrol:
2413 list_add(&path->list, &dapm->card->paths);
2414 list_add(&path->list_sink, &wsink->sources);
2415 list_add(&path->list_source, &wsource->sinks);
2416 path->connect = 1;
2417 return 0;
2418 case snd_soc_dapm_mux:
2419 case snd_soc_dapm_virt_mux:
2420 case snd_soc_dapm_value_mux:
2421 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2422 &wsink->kcontrol_news[0]);
2423 if (ret != 0)
2424 goto err;
2425 break;
2426 case snd_soc_dapm_switch:
2427 case snd_soc_dapm_mixer:
2428 case snd_soc_dapm_mixer_named_ctl:
2429 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2430 if (ret != 0)
2431 goto err;
2432 break;
2433 case snd_soc_dapm_hp:
2434 case snd_soc_dapm_mic:
2435 case snd_soc_dapm_line:
2436 case snd_soc_dapm_spk:
2437 list_add(&path->list, &dapm->card->paths);
2438 list_add(&path->list_sink, &wsink->sources);
2439 list_add(&path->list_source, &wsource->sinks);
2440 path->connect = 0;
2441 return 0;
2442 }
2443
2444 return 0;
2445 err:
2446 kfree(path);
2447 return ret;
2448 }
2449
2450 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2451 const struct snd_soc_dapm_route *route)
2452 {
2453 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2454 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2455 const char *sink;
2456 const char *source;
2457 char prefixed_sink[80];
2458 char prefixed_source[80];
2459 int ret;
2460
2461 if (dapm->codec && dapm->codec->name_prefix) {
2462 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2463 dapm->codec->name_prefix, route->sink);
2464 sink = prefixed_sink;
2465 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2466 dapm->codec->name_prefix, route->source);
2467 source = prefixed_source;
2468 } else {
2469 sink = route->sink;
2470 source = route->source;
2471 }
2472
2473 /*
2474 * find src and dest widgets over all widgets but favor a widget from
2475 * current DAPM context
2476 */
2477 list_for_each_entry(w, &dapm->card->widgets, list) {
2478 if (!wsink && !(strcmp(w->name, sink))) {
2479 wtsink = w;
2480 if (w->dapm == dapm)
2481 wsink = w;
2482 continue;
2483 }
2484 if (!wsource && !(strcmp(w->name, source))) {
2485 wtsource = w;
2486 if (w->dapm == dapm)
2487 wsource = w;
2488 }
2489 }
2490 /* use widget from another DAPM context if not found from this */
2491 if (!wsink)
2492 wsink = wtsink;
2493 if (!wsource)
2494 wsource = wtsource;
2495
2496 if (wsource == NULL) {
2497 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2498 route->source);
2499 return -ENODEV;
2500 }
2501 if (wsink == NULL) {
2502 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2503 route->sink);
2504 return -ENODEV;
2505 }
2506
2507 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2508 route->connected);
2509 if (ret)
2510 goto err;
2511
2512 return 0;
2513 err:
2514 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2515 source, route->control, sink);
2516 return ret;
2517 }
2518
2519 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2520 const struct snd_soc_dapm_route *route)
2521 {
2522 struct snd_soc_dapm_path *path, *p;
2523 const char *sink;
2524 const char *source;
2525 char prefixed_sink[80];
2526 char prefixed_source[80];
2527
2528 if (route->control) {
2529 dev_err(dapm->dev,
2530 "ASoC: Removal of routes with controls not supported\n");
2531 return -EINVAL;
2532 }
2533
2534 if (dapm->codec && dapm->codec->name_prefix) {
2535 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2536 dapm->codec->name_prefix, route->sink);
2537 sink = prefixed_sink;
2538 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2539 dapm->codec->name_prefix, route->source);
2540 source = prefixed_source;
2541 } else {
2542 sink = route->sink;
2543 source = route->source;
2544 }
2545
2546 path = NULL;
2547 list_for_each_entry(p, &dapm->card->paths, list) {
2548 if (strcmp(p->source->name, source) != 0)
2549 continue;
2550 if (strcmp(p->sink->name, sink) != 0)
2551 continue;
2552 path = p;
2553 break;
2554 }
2555
2556 if (path) {
2557 dapm_mark_dirty(path->source, "Route removed");
2558 dapm_mark_dirty(path->sink, "Route removed");
2559
2560 dapm_free_path(path);
2561 } else {
2562 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2563 source, sink);
2564 }
2565
2566 return 0;
2567 }
2568
2569 /**
2570 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2571 * @dapm: DAPM context
2572 * @route: audio routes
2573 * @num: number of routes
2574 *
2575 * Connects 2 dapm widgets together via a named audio path. The sink is
2576 * the widget receiving the audio signal, whilst the source is the sender
2577 * of the audio signal.
2578 *
2579 * Returns 0 for success else error. On error all resources can be freed
2580 * with a call to snd_soc_card_free().
2581 */
2582 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2583 const struct snd_soc_dapm_route *route, int num)
2584 {
2585 int i, r, ret = 0;
2586
2587 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2588 for (i = 0; i < num; i++) {
2589 r = snd_soc_dapm_add_route(dapm, route);
2590 if (r < 0) {
2591 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2592 route->source,
2593 route->control ? route->control : "direct",
2594 route->sink);
2595 ret = r;
2596 }
2597 route++;
2598 }
2599 mutex_unlock(&dapm->card->dapm_mutex);
2600
2601 return ret;
2602 }
2603 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2604
2605 /**
2606 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2607 * @dapm: DAPM context
2608 * @route: audio routes
2609 * @num: number of routes
2610 *
2611 * Removes routes from the DAPM context.
2612 */
2613 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2614 const struct snd_soc_dapm_route *route, int num)
2615 {
2616 int i, ret = 0;
2617
2618 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2619 for (i = 0; i < num; i++) {
2620 snd_soc_dapm_del_route(dapm, route);
2621 route++;
2622 }
2623 mutex_unlock(&dapm->card->dapm_mutex);
2624
2625 return ret;
2626 }
2627 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2628
2629 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2630 const struct snd_soc_dapm_route *route)
2631 {
2632 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2633 route->source,
2634 true);
2635 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2636 route->sink,
2637 true);
2638 struct snd_soc_dapm_path *path;
2639 int count = 0;
2640
2641 if (!source) {
2642 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2643 route->source);
2644 return -ENODEV;
2645 }
2646
2647 if (!sink) {
2648 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2649 route->sink);
2650 return -ENODEV;
2651 }
2652
2653 if (route->control || route->connected)
2654 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2655 route->source, route->sink);
2656
2657 list_for_each_entry(path, &source->sinks, list_source) {
2658 if (path->sink == sink) {
2659 path->weak = 1;
2660 count++;
2661 }
2662 }
2663
2664 if (count == 0)
2665 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2666 route->source, route->sink);
2667 if (count > 1)
2668 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2669 count, route->source, route->sink);
2670
2671 return 0;
2672 }
2673
2674 /**
2675 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2676 * @dapm: DAPM context
2677 * @route: audio routes
2678 * @num: number of routes
2679 *
2680 * Mark existing routes matching those specified in the passed array
2681 * as being weak, meaning that they are ignored for the purpose of
2682 * power decisions. The main intended use case is for sidetone paths
2683 * which couple audio between other independent paths if they are both
2684 * active in order to make the combination work better at the user
2685 * level but which aren't intended to be "used".
2686 *
2687 * Note that CODEC drivers should not use this as sidetone type paths
2688 * can frequently also be used as bypass paths.
2689 */
2690 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2691 const struct snd_soc_dapm_route *route, int num)
2692 {
2693 int i, err;
2694 int ret = 0;
2695
2696 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2697 for (i = 0; i < num; i++) {
2698 err = snd_soc_dapm_weak_route(dapm, route);
2699 if (err)
2700 ret = err;
2701 route++;
2702 }
2703 mutex_unlock(&dapm->card->dapm_mutex);
2704
2705 return ret;
2706 }
2707 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2708
2709 /**
2710 * snd_soc_dapm_new_widgets - add new dapm widgets
2711 * @dapm: DAPM context
2712 *
2713 * Checks the codec for any new dapm widgets and creates them if found.
2714 *
2715 * Returns 0 for success.
2716 */
2717 int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
2718 {
2719 struct snd_soc_dapm_widget *w;
2720 unsigned int val;
2721
2722 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2723
2724 list_for_each_entry(w, &card->widgets, list)
2725 {
2726 if (w->new)
2727 continue;
2728
2729 if (w->num_kcontrols) {
2730 w->kcontrols = kzalloc(w->num_kcontrols *
2731 sizeof(struct snd_kcontrol *),
2732 GFP_KERNEL);
2733 if (!w->kcontrols) {
2734 mutex_unlock(&card->dapm_mutex);
2735 return -ENOMEM;
2736 }
2737 }
2738
2739 switch(w->id) {
2740 case snd_soc_dapm_switch:
2741 case snd_soc_dapm_mixer:
2742 case snd_soc_dapm_mixer_named_ctl:
2743 dapm_new_mixer(w);
2744 break;
2745 case snd_soc_dapm_mux:
2746 case snd_soc_dapm_virt_mux:
2747 case snd_soc_dapm_value_mux:
2748 dapm_new_mux(w);
2749 break;
2750 case snd_soc_dapm_pga:
2751 case snd_soc_dapm_out_drv:
2752 dapm_new_pga(w);
2753 break;
2754 default:
2755 break;
2756 }
2757
2758 /* Read the initial power state from the device */
2759 if (w->reg >= 0) {
2760 val = soc_widget_read(w, w->reg) >> w->shift;
2761 val &= w->mask;
2762 if (val == w->on_val)
2763 w->power = 1;
2764 }
2765
2766 w->new = 1;
2767
2768 dapm_mark_dirty(w, "new widget");
2769 dapm_debugfs_add_widget(w);
2770 }
2771
2772 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2773 mutex_unlock(&card->dapm_mutex);
2774 return 0;
2775 }
2776 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2777
2778 /**
2779 * snd_soc_dapm_get_volsw - dapm mixer get callback
2780 * @kcontrol: mixer control
2781 * @ucontrol: control element information
2782 *
2783 * Callback to get the value of a dapm mixer control.
2784 *
2785 * Returns 0 for success.
2786 */
2787 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2788 struct snd_ctl_elem_value *ucontrol)
2789 {
2790 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2791 struct snd_soc_card *card = codec->card;
2792 struct soc_mixer_control *mc =
2793 (struct soc_mixer_control *)kcontrol->private_value;
2794 unsigned int reg = mc->reg;
2795 unsigned int shift = mc->shift;
2796 int max = mc->max;
2797 unsigned int mask = (1 << fls(max)) - 1;
2798 unsigned int invert = mc->invert;
2799 unsigned int val;
2800
2801 if (snd_soc_volsw_is_stereo(mc))
2802 dev_warn(codec->dapm.dev,
2803 "ASoC: Control '%s' is stereo, which is not supported\n",
2804 kcontrol->id.name);
2805
2806 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2807 if (dapm_kcontrol_is_powered(kcontrol))
2808 val = (snd_soc_read(codec, reg) >> shift) & mask;
2809 else
2810 val = dapm_kcontrol_get_value(kcontrol);
2811 mutex_unlock(&card->dapm_mutex);
2812
2813 if (invert)
2814 ucontrol->value.integer.value[0] = max - val;
2815 else
2816 ucontrol->value.integer.value[0] = val;
2817
2818 return 0;
2819 }
2820 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2821
2822 /**
2823 * snd_soc_dapm_put_volsw - dapm mixer set callback
2824 * @kcontrol: mixer control
2825 * @ucontrol: control element information
2826 *
2827 * Callback to set the value of a dapm mixer control.
2828 *
2829 * Returns 0 for success.
2830 */
2831 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2832 struct snd_ctl_elem_value *ucontrol)
2833 {
2834 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2835 struct snd_soc_card *card = codec->card;
2836 struct soc_mixer_control *mc =
2837 (struct soc_mixer_control *)kcontrol->private_value;
2838 unsigned int reg = mc->reg;
2839 unsigned int shift = mc->shift;
2840 int max = mc->max;
2841 unsigned int mask = (1 << fls(max)) - 1;
2842 unsigned int invert = mc->invert;
2843 unsigned int val;
2844 int connect, change;
2845 struct snd_soc_dapm_update update;
2846
2847 if (snd_soc_volsw_is_stereo(mc))
2848 dev_warn(codec->dapm.dev,
2849 "ASoC: Control '%s' is stereo, which is not supported\n",
2850 kcontrol->id.name);
2851
2852 val = (ucontrol->value.integer.value[0] & mask);
2853 connect = !!val;
2854
2855 if (invert)
2856 val = max - val;
2857
2858 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2859
2860 dapm_kcontrol_set_value(kcontrol, val);
2861
2862 mask = mask << shift;
2863 val = val << shift;
2864
2865 change = snd_soc_test_bits(codec, reg, mask, val);
2866 if (change) {
2867 update.kcontrol = kcontrol;
2868 update.reg = reg;
2869 update.mask = mask;
2870 update.val = val;
2871
2872 card->update = &update;
2873
2874 soc_dapm_mixer_update_power(card, kcontrol, connect);
2875
2876 card->update = NULL;
2877 }
2878
2879 mutex_unlock(&card->dapm_mutex);
2880 return change;
2881 }
2882 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2883
2884 /**
2885 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2886 * @kcontrol: mixer control
2887 * @ucontrol: control element information
2888 *
2889 * Callback to get the value of a dapm enumerated double mixer control.
2890 *
2891 * Returns 0 for success.
2892 */
2893 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2894 struct snd_ctl_elem_value *ucontrol)
2895 {
2896 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2897 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2898 unsigned int val;
2899
2900 val = snd_soc_read(codec, e->reg);
2901 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & e->mask;
2902 if (e->shift_l != e->shift_r)
2903 ucontrol->value.enumerated.item[1] =
2904 (val >> e->shift_r) & e->mask;
2905
2906 return 0;
2907 }
2908 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2909
2910 /**
2911 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2912 * @kcontrol: mixer control
2913 * @ucontrol: control element information
2914 *
2915 * Callback to set the value of a dapm enumerated double mixer control.
2916 *
2917 * Returns 0 for success.
2918 */
2919 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2920 struct snd_ctl_elem_value *ucontrol)
2921 {
2922 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2923 struct snd_soc_card *card = codec->card;
2924 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2925 unsigned int val, mux, change;
2926 unsigned int mask;
2927 struct snd_soc_dapm_update update;
2928
2929 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2930 return -EINVAL;
2931 mux = ucontrol->value.enumerated.item[0];
2932 val = mux << e->shift_l;
2933 mask = e->mask << e->shift_l;
2934 if (e->shift_l != e->shift_r) {
2935 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2936 return -EINVAL;
2937 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2938 mask |= e->mask << e->shift_r;
2939 }
2940
2941 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2942
2943 change = snd_soc_test_bits(codec, e->reg, mask, val);
2944 if (change) {
2945 update.kcontrol = kcontrol;
2946 update.reg = e->reg;
2947 update.mask = mask;
2948 update.val = val;
2949 card->update = &update;
2950
2951 soc_dapm_mux_update_power(card, kcontrol, mux, e);
2952
2953 card->update = NULL;
2954 }
2955
2956 mutex_unlock(&card->dapm_mutex);
2957 return change;
2958 }
2959 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2960
2961 /**
2962 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2963 * @kcontrol: mixer control
2964 * @ucontrol: control element information
2965 *
2966 * Returns 0 for success.
2967 */
2968 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2969 struct snd_ctl_elem_value *ucontrol)
2970 {
2971 ucontrol->value.enumerated.item[0] = dapm_kcontrol_get_value(kcontrol);
2972 return 0;
2973 }
2974 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2975
2976 /**
2977 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2978 * @kcontrol: mixer control
2979 * @ucontrol: control element information
2980 *
2981 * Returns 0 for success.
2982 */
2983 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2984 struct snd_ctl_elem_value *ucontrol)
2985 {
2986 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2987 struct snd_soc_card *card = codec->card;
2988 unsigned int value;
2989 struct soc_enum *e =
2990 (struct soc_enum *)kcontrol->private_value;
2991 int change;
2992
2993 if (ucontrol->value.enumerated.item[0] >= e->max)
2994 return -EINVAL;
2995
2996 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2997
2998 value = ucontrol->value.enumerated.item[0];
2999 change = dapm_kcontrol_set_value(kcontrol, value);
3000 if (change)
3001 soc_dapm_mux_update_power(card, kcontrol, value, e);
3002
3003 mutex_unlock(&card->dapm_mutex);
3004 return change;
3005 }
3006 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
3007
3008 /**
3009 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
3010 * callback
3011 * @kcontrol: mixer control
3012 * @ucontrol: control element information
3013 *
3014 * Callback to get the value of a dapm semi enumerated double mixer control.
3015 *
3016 * Semi enumerated mixer: the enumerated items are referred as values. Can be
3017 * used for handling bitfield coded enumeration for example.
3018 *
3019 * Returns 0 for success.
3020 */
3021 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
3022 struct snd_ctl_elem_value *ucontrol)
3023 {
3024 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
3025 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3026 unsigned int reg_val, val, mux;
3027
3028 reg_val = snd_soc_read(codec, e->reg);
3029 val = (reg_val >> e->shift_l) & e->mask;
3030 for (mux = 0; mux < e->max; mux++) {
3031 if (val == e->values[mux])
3032 break;
3033 }
3034 ucontrol->value.enumerated.item[0] = mux;
3035 if (e->shift_l != e->shift_r) {
3036 val = (reg_val >> e->shift_r) & e->mask;
3037 for (mux = 0; mux < e->max; mux++) {
3038 if (val == e->values[mux])
3039 break;
3040 }
3041 ucontrol->value.enumerated.item[1] = mux;
3042 }
3043
3044 return 0;
3045 }
3046 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
3047
3048 /**
3049 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
3050 * callback
3051 * @kcontrol: mixer control
3052 * @ucontrol: control element information
3053 *
3054 * Callback to set the value of a dapm semi enumerated double mixer control.
3055 *
3056 * Semi enumerated mixer: the enumerated items are referred as values. Can be
3057 * used for handling bitfield coded enumeration for example.
3058 *
3059 * Returns 0 for success.
3060 */
3061 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
3062 struct snd_ctl_elem_value *ucontrol)
3063 {
3064 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
3065 struct snd_soc_card *card = codec->card;
3066 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3067 unsigned int val, mux, change;
3068 unsigned int mask;
3069 struct snd_soc_dapm_update update;
3070
3071 if (ucontrol->value.enumerated.item[0] > e->max - 1)
3072 return -EINVAL;
3073 mux = ucontrol->value.enumerated.item[0];
3074 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
3075 mask = e->mask << e->shift_l;
3076 if (e->shift_l != e->shift_r) {
3077 if (ucontrol->value.enumerated.item[1] > e->max - 1)
3078 return -EINVAL;
3079 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
3080 mask |= e->mask << e->shift_r;
3081 }
3082
3083 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3084
3085 change = snd_soc_test_bits(codec, e->reg, mask, val);
3086 if (change) {
3087 update.kcontrol = kcontrol;
3088 update.reg = e->reg;
3089 update.mask = mask;
3090 update.val = val;
3091 card->update = &update;
3092
3093 soc_dapm_mux_update_power(card, kcontrol, mux, e);
3094
3095 card->update = NULL;
3096 }
3097
3098 mutex_unlock(&card->dapm_mutex);
3099 return change;
3100 }
3101 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
3102
3103 /**
3104 * snd_soc_dapm_info_pin_switch - Info for a pin switch
3105 *
3106 * @kcontrol: mixer control
3107 * @uinfo: control element information
3108 *
3109 * Callback to provide information about a pin switch control.
3110 */
3111 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3112 struct snd_ctl_elem_info *uinfo)
3113 {
3114 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3115 uinfo->count = 1;
3116 uinfo->value.integer.min = 0;
3117 uinfo->value.integer.max = 1;
3118
3119 return 0;
3120 }
3121 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3122
3123 /**
3124 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3125 *
3126 * @kcontrol: mixer control
3127 * @ucontrol: Value
3128 */
3129 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3130 struct snd_ctl_elem_value *ucontrol)
3131 {
3132 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3133 const char *pin = (const char *)kcontrol->private_value;
3134
3135 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3136
3137 ucontrol->value.integer.value[0] =
3138 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3139
3140 mutex_unlock(&card->dapm_mutex);
3141
3142 return 0;
3143 }
3144 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3145
3146 /**
3147 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3148 *
3149 * @kcontrol: mixer control
3150 * @ucontrol: Value
3151 */
3152 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3153 struct snd_ctl_elem_value *ucontrol)
3154 {
3155 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3156 const char *pin = (const char *)kcontrol->private_value;
3157
3158 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3159
3160 if (ucontrol->value.integer.value[0])
3161 snd_soc_dapm_enable_pin(&card->dapm, pin);
3162 else
3163 snd_soc_dapm_disable_pin(&card->dapm, pin);
3164
3165 mutex_unlock(&card->dapm_mutex);
3166
3167 snd_soc_dapm_sync(&card->dapm);
3168 return 0;
3169 }
3170 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3171
3172 static struct snd_soc_dapm_widget *
3173 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3174 const struct snd_soc_dapm_widget *widget)
3175 {
3176 struct snd_soc_dapm_widget *w;
3177 int ret;
3178
3179 if ((w = dapm_cnew_widget(widget)) == NULL)
3180 return NULL;
3181
3182 switch (w->id) {
3183 case snd_soc_dapm_regulator_supply:
3184 w->regulator = devm_regulator_get(dapm->dev, w->name);
3185 if (IS_ERR(w->regulator)) {
3186 ret = PTR_ERR(w->regulator);
3187 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3188 w->name, ret);
3189 return NULL;
3190 }
3191
3192 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3193 ret = regulator_allow_bypass(w->regulator, true);
3194 if (ret != 0)
3195 dev_warn(w->dapm->dev,
3196 "ASoC: Failed to unbypass %s: %d\n",
3197 w->name, ret);
3198 }
3199 break;
3200 case snd_soc_dapm_clock_supply:
3201 #ifdef CONFIG_CLKDEV_LOOKUP
3202 w->clk = devm_clk_get(dapm->dev, w->name);
3203 if (IS_ERR(w->clk)) {
3204 ret = PTR_ERR(w->clk);
3205 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3206 w->name, ret);
3207 return NULL;
3208 }
3209 #else
3210 return NULL;
3211 #endif
3212 break;
3213 default:
3214 break;
3215 }
3216
3217 if (dapm->codec && dapm->codec->name_prefix)
3218 w->name = kasprintf(GFP_KERNEL, "%s %s",
3219 dapm->codec->name_prefix, widget->name);
3220 else
3221 w->name = kasprintf(GFP_KERNEL, "%s", widget->name);
3222
3223 if (w->name == NULL) {
3224 kfree(w);
3225 return NULL;
3226 }
3227
3228 switch (w->id) {
3229 case snd_soc_dapm_switch:
3230 case snd_soc_dapm_mixer:
3231 case snd_soc_dapm_mixer_named_ctl:
3232 w->power_check = dapm_generic_check_power;
3233 break;
3234 case snd_soc_dapm_mux:
3235 case snd_soc_dapm_virt_mux:
3236 case snd_soc_dapm_value_mux:
3237 w->power_check = dapm_generic_check_power;
3238 break;
3239 case snd_soc_dapm_dai_out:
3240 w->power_check = dapm_adc_check_power;
3241 break;
3242 case snd_soc_dapm_dai_in:
3243 w->power_check = dapm_dac_check_power;
3244 break;
3245 case snd_soc_dapm_adc:
3246 case snd_soc_dapm_aif_out:
3247 case snd_soc_dapm_dac:
3248 case snd_soc_dapm_aif_in:
3249 case snd_soc_dapm_pga:
3250 case snd_soc_dapm_out_drv:
3251 case snd_soc_dapm_input:
3252 case snd_soc_dapm_output:
3253 case snd_soc_dapm_micbias:
3254 case snd_soc_dapm_spk:
3255 case snd_soc_dapm_hp:
3256 case snd_soc_dapm_mic:
3257 case snd_soc_dapm_line:
3258 case snd_soc_dapm_dai_link:
3259 w->power_check = dapm_generic_check_power;
3260 break;
3261 case snd_soc_dapm_supply:
3262 case snd_soc_dapm_regulator_supply:
3263 case snd_soc_dapm_clock_supply:
3264 case snd_soc_dapm_kcontrol:
3265 w->power_check = dapm_supply_check_power;
3266 break;
3267 default:
3268 w->power_check = dapm_always_on_check_power;
3269 break;
3270 }
3271
3272 w->dapm = dapm;
3273 w->codec = dapm->codec;
3274 w->platform = dapm->platform;
3275 INIT_LIST_HEAD(&w->sources);
3276 INIT_LIST_HEAD(&w->sinks);
3277 INIT_LIST_HEAD(&w->list);
3278 INIT_LIST_HEAD(&w->dirty);
3279 list_add(&w->list, &dapm->card->widgets);
3280
3281 /* machine layer set ups unconnected pins and insertions */
3282 w->connected = 1;
3283 return w;
3284 }
3285
3286 /**
3287 * snd_soc_dapm_new_controls - create new dapm controls
3288 * @dapm: DAPM context
3289 * @widget: widget array
3290 * @num: number of widgets
3291 *
3292 * Creates new DAPM controls based upon the templates.
3293 *
3294 * Returns 0 for success else error.
3295 */
3296 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3297 const struct snd_soc_dapm_widget *widget,
3298 int num)
3299 {
3300 struct snd_soc_dapm_widget *w;
3301 int i;
3302 int ret = 0;
3303
3304 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3305 for (i = 0; i < num; i++) {
3306 w = snd_soc_dapm_new_control(dapm, widget);
3307 if (!w) {
3308 dev_err(dapm->dev,
3309 "ASoC: Failed to create DAPM control %s\n",
3310 widget->name);
3311 ret = -ENOMEM;
3312 break;
3313 }
3314 widget++;
3315 }
3316 mutex_unlock(&dapm->card->dapm_mutex);
3317 return ret;
3318 }
3319 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3320
3321 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3322 struct snd_kcontrol *kcontrol, int event)
3323 {
3324 struct snd_soc_dapm_path *source_p, *sink_p;
3325 struct snd_soc_dai *source, *sink;
3326 const struct snd_soc_pcm_stream *config = w->params;
3327 struct snd_pcm_substream substream;
3328 struct snd_pcm_hw_params *params = NULL;
3329 u64 fmt;
3330 int ret;
3331
3332 BUG_ON(!config);
3333 BUG_ON(list_empty(&w->sources) || list_empty(&w->sinks));
3334
3335 /* We only support a single source and sink, pick the first */
3336 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3337 list_sink);
3338 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3339 list_source);
3340
3341 BUG_ON(!source_p || !sink_p);
3342 BUG_ON(!sink_p->source || !source_p->sink);
3343 BUG_ON(!source_p->source || !sink_p->sink);
3344
3345 source = source_p->source->priv;
3346 sink = sink_p->sink->priv;
3347
3348 /* Be a little careful as we don't want to overflow the mask array */
3349 if (config->formats) {
3350 fmt = ffs(config->formats) - 1;
3351 } else {
3352 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3353 config->formats);
3354 fmt = 0;
3355 }
3356
3357 /* Currently very limited parameter selection */
3358 params = kzalloc(sizeof(*params), GFP_KERNEL);
3359 if (!params) {
3360 ret = -ENOMEM;
3361 goto out;
3362 }
3363 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3364
3365 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3366 config->rate_min;
3367 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3368 config->rate_max;
3369
3370 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3371 = config->channels_min;
3372 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3373 = config->channels_max;
3374
3375 memset(&substream, 0, sizeof(substream));
3376
3377 switch (event) {
3378 case SND_SOC_DAPM_PRE_PMU:
3379 if (source->driver->ops && source->driver->ops->hw_params) {
3380 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3381 ret = source->driver->ops->hw_params(&substream,
3382 params, source);
3383 if (ret != 0) {
3384 dev_err(source->dev,
3385 "ASoC: hw_params() failed: %d\n", ret);
3386 goto out;
3387 }
3388 }
3389
3390 if (sink->driver->ops && sink->driver->ops->hw_params) {
3391 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3392 ret = sink->driver->ops->hw_params(&substream, params,
3393 sink);
3394 if (ret != 0) {
3395 dev_err(sink->dev,
3396 "ASoC: hw_params() failed: %d\n", ret);
3397 goto out;
3398 }
3399 }
3400 break;
3401
3402 case SND_SOC_DAPM_POST_PMU:
3403 ret = snd_soc_dai_digital_mute(sink, 0,
3404 SNDRV_PCM_STREAM_PLAYBACK);
3405 if (ret != 0 && ret != -ENOTSUPP)
3406 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3407 ret = 0;
3408 break;
3409
3410 case SND_SOC_DAPM_PRE_PMD:
3411 ret = snd_soc_dai_digital_mute(sink, 1,
3412 SNDRV_PCM_STREAM_PLAYBACK);
3413 if (ret != 0 && ret != -ENOTSUPP)
3414 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3415 ret = 0;
3416 break;
3417
3418 default:
3419 BUG();
3420 return -EINVAL;
3421 }
3422
3423 out:
3424 kfree(params);
3425 return ret;
3426 }
3427
3428 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3429 const struct snd_soc_pcm_stream *params,
3430 struct snd_soc_dapm_widget *source,
3431 struct snd_soc_dapm_widget *sink)
3432 {
3433 struct snd_soc_dapm_route routes[2];
3434 struct snd_soc_dapm_widget template;
3435 struct snd_soc_dapm_widget *w;
3436 size_t len;
3437 char *link_name;
3438
3439 len = strlen(source->name) + strlen(sink->name) + 2;
3440 link_name = devm_kzalloc(card->dev, len, GFP_KERNEL);
3441 if (!link_name)
3442 return -ENOMEM;
3443 snprintf(link_name, len, "%s-%s", source->name, sink->name);
3444
3445 memset(&template, 0, sizeof(template));
3446 template.reg = SND_SOC_NOPM;
3447 template.id = snd_soc_dapm_dai_link;
3448 template.name = link_name;
3449 template.event = snd_soc_dai_link_event;
3450 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3451 SND_SOC_DAPM_PRE_PMD;
3452
3453 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3454
3455 w = snd_soc_dapm_new_control(&card->dapm, &template);
3456 if (!w) {
3457 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3458 link_name);
3459 return -ENOMEM;
3460 }
3461
3462 w->params = params;
3463
3464 memset(&routes, 0, sizeof(routes));
3465
3466 routes[0].source = source->name;
3467 routes[0].sink = link_name;
3468 routes[1].source = link_name;
3469 routes[1].sink = sink->name;
3470
3471 return snd_soc_dapm_add_routes(&card->dapm, routes,
3472 ARRAY_SIZE(routes));
3473 }
3474
3475 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3476 struct snd_soc_dai *dai)
3477 {
3478 struct snd_soc_dapm_widget template;
3479 struct snd_soc_dapm_widget *w;
3480
3481 WARN_ON(dapm->dev != dai->dev);
3482
3483 memset(&template, 0, sizeof(template));
3484 template.reg = SND_SOC_NOPM;
3485
3486 if (dai->driver->playback.stream_name) {
3487 template.id = snd_soc_dapm_dai_in;
3488 template.name = dai->driver->playback.stream_name;
3489 template.sname = dai->driver->playback.stream_name;
3490
3491 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3492 template.name);
3493
3494 w = snd_soc_dapm_new_control(dapm, &template);
3495 if (!w) {
3496 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3497 dai->driver->playback.stream_name);
3498 return -ENOMEM;
3499 }
3500
3501 w->priv = dai;
3502 dai->playback_widget = w;
3503 }
3504
3505 if (dai->driver->capture.stream_name) {
3506 template.id = snd_soc_dapm_dai_out;
3507 template.name = dai->driver->capture.stream_name;
3508 template.sname = dai->driver->capture.stream_name;
3509
3510 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3511 template.name);
3512
3513 w = snd_soc_dapm_new_control(dapm, &template);
3514 if (!w) {
3515 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3516 dai->driver->capture.stream_name);
3517 return -ENOMEM;
3518 }
3519
3520 w->priv = dai;
3521 dai->capture_widget = w;
3522 }
3523
3524 return 0;
3525 }
3526
3527 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3528 {
3529 struct snd_soc_dapm_widget *dai_w, *w;
3530 struct snd_soc_dai *dai;
3531
3532 /* For each DAI widget... */
3533 list_for_each_entry(dai_w, &card->widgets, list) {
3534 switch (dai_w->id) {
3535 case snd_soc_dapm_dai_in:
3536 case snd_soc_dapm_dai_out:
3537 break;
3538 default:
3539 continue;
3540 }
3541
3542 dai = dai_w->priv;
3543
3544 /* ...find all widgets with the same stream and link them */
3545 list_for_each_entry(w, &card->widgets, list) {
3546 if (w->dapm != dai_w->dapm)
3547 continue;
3548
3549 switch (w->id) {
3550 case snd_soc_dapm_dai_in:
3551 case snd_soc_dapm_dai_out:
3552 continue;
3553 default:
3554 break;
3555 }
3556
3557 if (!w->sname || !strstr(w->sname, dai_w->name))
3558 continue;
3559
3560 if (dai->driver->playback.stream_name &&
3561 strstr(w->sname,
3562 dai->driver->playback.stream_name)) {
3563 dev_dbg(dai->dev, "%s -> %s\n",
3564 dai->playback_widget->name, w->name);
3565
3566 snd_soc_dapm_add_path(w->dapm,
3567 dai->playback_widget, w, NULL, NULL);
3568 }
3569
3570 if (dai->driver->capture.stream_name &&
3571 strstr(w->sname,
3572 dai->driver->capture.stream_name)) {
3573 dev_dbg(dai->dev, "%s -> %s\n",
3574 w->name, dai->capture_widget->name);
3575
3576 snd_soc_dapm_add_path(w->dapm, w,
3577 dai->capture_widget, NULL, NULL);
3578 }
3579 }
3580 }
3581
3582 return 0;
3583 }
3584
3585 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3586 int event)
3587 {
3588
3589 struct snd_soc_dapm_widget *w_cpu, *w_codec;
3590 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3591 struct snd_soc_dai *codec_dai = rtd->codec_dai;
3592
3593 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
3594 w_cpu = cpu_dai->playback_widget;
3595 w_codec = codec_dai->playback_widget;
3596 } else {
3597 w_cpu = cpu_dai->capture_widget;
3598 w_codec = codec_dai->capture_widget;
3599 }
3600
3601 if (w_cpu) {
3602
3603 dapm_mark_dirty(w_cpu, "stream event");
3604
3605 switch (event) {
3606 case SND_SOC_DAPM_STREAM_START:
3607 w_cpu->active = 1;
3608 break;
3609 case SND_SOC_DAPM_STREAM_STOP:
3610 w_cpu->active = 0;
3611 break;
3612 case SND_SOC_DAPM_STREAM_SUSPEND:
3613 case SND_SOC_DAPM_STREAM_RESUME:
3614 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3615 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3616 break;
3617 }
3618 }
3619
3620 if (w_codec) {
3621
3622 dapm_mark_dirty(w_codec, "stream event");
3623
3624 switch (event) {
3625 case SND_SOC_DAPM_STREAM_START:
3626 w_codec->active = 1;
3627 break;
3628 case SND_SOC_DAPM_STREAM_STOP:
3629 w_codec->active = 0;
3630 break;
3631 case SND_SOC_DAPM_STREAM_SUSPEND:
3632 case SND_SOC_DAPM_STREAM_RESUME:
3633 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3634 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3635 break;
3636 }
3637 }
3638
3639 dapm_power_widgets(rtd->card, event);
3640 }
3641
3642 /**
3643 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3644 * @rtd: PCM runtime data
3645 * @stream: stream name
3646 * @event: stream event
3647 *
3648 * Sends a stream event to the dapm core. The core then makes any
3649 * necessary widget power changes.
3650 *
3651 * Returns 0 for success else error.
3652 */
3653 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3654 int event)
3655 {
3656 struct snd_soc_card *card = rtd->card;
3657
3658 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3659 soc_dapm_stream_event(rtd, stream, event);
3660 mutex_unlock(&card->dapm_mutex);
3661 }
3662
3663 /**
3664 * snd_soc_dapm_enable_pin - enable pin.
3665 * @dapm: DAPM context
3666 * @pin: pin name
3667 *
3668 * Enables input/output pin and its parents or children widgets iff there is
3669 * a valid audio route and active audio stream.
3670 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3671 * do any widget power switching.
3672 */
3673 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3674 {
3675 return snd_soc_dapm_set_pin(dapm, pin, 1);
3676 }
3677 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3678
3679 /**
3680 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3681 * @dapm: DAPM context
3682 * @pin: pin name
3683 *
3684 * Enables input/output pin regardless of any other state. This is
3685 * intended for use with microphone bias supplies used in microphone
3686 * jack detection.
3687 *
3688 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3689 * do any widget power switching.
3690 */
3691 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3692 const char *pin)
3693 {
3694 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3695
3696 if (!w) {
3697 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3698 return -EINVAL;
3699 }
3700
3701 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
3702 w->connected = 1;
3703 w->force = 1;
3704 dapm_mark_dirty(w, "force enable");
3705
3706 return 0;
3707 }
3708 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3709
3710 /**
3711 * snd_soc_dapm_disable_pin - disable pin.
3712 * @dapm: DAPM context
3713 * @pin: pin name
3714 *
3715 * Disables input/output pin and its parents or children widgets.
3716 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3717 * do any widget power switching.
3718 */
3719 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3720 const char *pin)
3721 {
3722 return snd_soc_dapm_set_pin(dapm, pin, 0);
3723 }
3724 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3725
3726 /**
3727 * snd_soc_dapm_nc_pin - permanently disable pin.
3728 * @dapm: DAPM context
3729 * @pin: pin name
3730 *
3731 * Marks the specified pin as being not connected, disabling it along
3732 * any parent or child widgets. At present this is identical to
3733 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3734 * additional things such as disabling controls which only affect
3735 * paths through the pin.
3736 *
3737 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3738 * do any widget power switching.
3739 */
3740 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3741 {
3742 return snd_soc_dapm_set_pin(dapm, pin, 0);
3743 }
3744 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3745
3746 /**
3747 * snd_soc_dapm_get_pin_status - get audio pin status
3748 * @dapm: DAPM context
3749 * @pin: audio signal pin endpoint (or start point)
3750 *
3751 * Get audio pin status - connected or disconnected.
3752 *
3753 * Returns 1 for connected otherwise 0.
3754 */
3755 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3756 const char *pin)
3757 {
3758 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3759
3760 if (w)
3761 return w->connected;
3762
3763 return 0;
3764 }
3765 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3766
3767 /**
3768 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3769 * @dapm: DAPM context
3770 * @pin: audio signal pin endpoint (or start point)
3771 *
3772 * Mark the given endpoint or pin as ignoring suspend. When the
3773 * system is disabled a path between two endpoints flagged as ignoring
3774 * suspend will not be disabled. The path must already be enabled via
3775 * normal means at suspend time, it will not be turned on if it was not
3776 * already enabled.
3777 */
3778 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3779 const char *pin)
3780 {
3781 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3782
3783 if (!w) {
3784 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3785 return -EINVAL;
3786 }
3787
3788 w->ignore_suspend = 1;
3789
3790 return 0;
3791 }
3792 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3793
3794 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3795 struct snd_soc_dapm_widget *w)
3796 {
3797 struct snd_soc_dapm_path *p;
3798
3799 list_for_each_entry(p, &card->paths, list) {
3800 if ((p->source == w) || (p->sink == w)) {
3801 dev_dbg(card->dev,
3802 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3803 p->source->name, p->source->id, p->source->dapm,
3804 p->sink->name, p->sink->id, p->sink->dapm);
3805
3806 /* Connected to something other than the codec */
3807 if (p->source->dapm != p->sink->dapm)
3808 return true;
3809 /*
3810 * Loopback connection from codec external pin to
3811 * codec external pin
3812 */
3813 if (p->sink->id == snd_soc_dapm_input) {
3814 switch (p->source->id) {
3815 case snd_soc_dapm_output:
3816 case snd_soc_dapm_micbias:
3817 return true;
3818 default:
3819 break;
3820 }
3821 }
3822 }
3823 }
3824
3825 return false;
3826 }
3827
3828 /**
3829 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3830 * @codec: The codec whose pins should be processed
3831 *
3832 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3833 * which are unused. Pins are used if they are connected externally to the
3834 * codec, whether that be to some other device, or a loop-back connection to
3835 * the codec itself.
3836 */
3837 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3838 {
3839 struct snd_soc_card *card = codec->card;
3840 struct snd_soc_dapm_context *dapm = &codec->dapm;
3841 struct snd_soc_dapm_widget *w;
3842
3843 dev_dbg(codec->dev, "ASoC: Auto NC: DAPMs: card:%p codec:%p\n",
3844 &card->dapm, &codec->dapm);
3845
3846 list_for_each_entry(w, &card->widgets, list) {
3847 if (w->dapm != dapm)
3848 continue;
3849 switch (w->id) {
3850 case snd_soc_dapm_input:
3851 case snd_soc_dapm_output:
3852 case snd_soc_dapm_micbias:
3853 dev_dbg(codec->dev, "ASoC: Auto NC: Checking widget %s\n",
3854 w->name);
3855 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3856 dev_dbg(codec->dev,
3857 "... Not in map; disabling\n");
3858 snd_soc_dapm_nc_pin(dapm, w->name);
3859 }
3860 break;
3861 default:
3862 break;
3863 }
3864 }
3865 }
3866
3867 /**
3868 * snd_soc_dapm_free - free dapm resources
3869 * @dapm: DAPM context
3870 *
3871 * Free all dapm widgets and resources.
3872 */
3873 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3874 {
3875 snd_soc_dapm_sys_remove(dapm->dev);
3876 dapm_debugfs_cleanup(dapm);
3877 dapm_free_widgets(dapm);
3878 list_del(&dapm->list);
3879 }
3880 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3881
3882 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3883 {
3884 struct snd_soc_card *card = dapm->card;
3885 struct snd_soc_dapm_widget *w;
3886 LIST_HEAD(down_list);
3887 int powerdown = 0;
3888
3889 mutex_lock(&card->dapm_mutex);
3890
3891 list_for_each_entry(w, &dapm->card->widgets, list) {
3892 if (w->dapm != dapm)
3893 continue;
3894 if (w->power) {
3895 dapm_seq_insert(w, &down_list, false);
3896 w->power = 0;
3897 powerdown = 1;
3898 }
3899 }
3900
3901 /* If there were no widgets to power down we're already in
3902 * standby.
3903 */
3904 if (powerdown) {
3905 if (dapm->bias_level == SND_SOC_BIAS_ON)
3906 snd_soc_dapm_set_bias_level(dapm,
3907 SND_SOC_BIAS_PREPARE);
3908 dapm_seq_run(card, &down_list, 0, false);
3909 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3910 snd_soc_dapm_set_bias_level(dapm,
3911 SND_SOC_BIAS_STANDBY);
3912 }
3913
3914 mutex_unlock(&card->dapm_mutex);
3915 }
3916
3917 /*
3918 * snd_soc_dapm_shutdown - callback for system shutdown
3919 */
3920 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3921 {
3922 struct snd_soc_codec *codec;
3923
3924 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
3925 soc_dapm_shutdown_codec(&codec->dapm);
3926 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3927 snd_soc_dapm_set_bias_level(&codec->dapm,
3928 SND_SOC_BIAS_OFF);
3929 }
3930 }
3931
3932 /* Module information */
3933 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3934 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3935 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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