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Merge remote-tracking branch 'asoc/fix/tlv320aic3x' into asoc-linus
[GitHub/mt8127/android_kernel_alcatel_ttab.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 /* dapm power sequences - make this per codec in the future */
51 static int dapm_up_seq[] = {
52 [snd_soc_dapm_pre] = 0,
53 [snd_soc_dapm_supply] = 1,
54 [snd_soc_dapm_regulator_supply] = 1,
55 [snd_soc_dapm_clock_supply] = 1,
56 [snd_soc_dapm_micbias] = 2,
57 [snd_soc_dapm_dai_link] = 2,
58 [snd_soc_dapm_dai_in] = 3,
59 [snd_soc_dapm_dai_out] = 3,
60 [snd_soc_dapm_aif_in] = 3,
61 [snd_soc_dapm_aif_out] = 3,
62 [snd_soc_dapm_mic] = 4,
63 [snd_soc_dapm_mux] = 5,
64 [snd_soc_dapm_virt_mux] = 5,
65 [snd_soc_dapm_value_mux] = 5,
66 [snd_soc_dapm_dac] = 6,
67 [snd_soc_dapm_mixer] = 7,
68 [snd_soc_dapm_mixer_named_ctl] = 7,
69 [snd_soc_dapm_pga] = 8,
70 [snd_soc_dapm_adc] = 9,
71 [snd_soc_dapm_out_drv] = 10,
72 [snd_soc_dapm_hp] = 10,
73 [snd_soc_dapm_spk] = 10,
74 [snd_soc_dapm_line] = 10,
75 [snd_soc_dapm_post] = 11,
76 };
77
78 static int dapm_down_seq[] = {
79 [snd_soc_dapm_pre] = 0,
80 [snd_soc_dapm_adc] = 1,
81 [snd_soc_dapm_hp] = 2,
82 [snd_soc_dapm_spk] = 2,
83 [snd_soc_dapm_line] = 2,
84 [snd_soc_dapm_out_drv] = 2,
85 [snd_soc_dapm_pga] = 4,
86 [snd_soc_dapm_mixer_named_ctl] = 5,
87 [snd_soc_dapm_mixer] = 5,
88 [snd_soc_dapm_dac] = 6,
89 [snd_soc_dapm_mic] = 7,
90 [snd_soc_dapm_micbias] = 8,
91 [snd_soc_dapm_mux] = 9,
92 [snd_soc_dapm_virt_mux] = 9,
93 [snd_soc_dapm_value_mux] = 9,
94 [snd_soc_dapm_aif_in] = 10,
95 [snd_soc_dapm_aif_out] = 10,
96 [snd_soc_dapm_dai_in] = 10,
97 [snd_soc_dapm_dai_out] = 10,
98 [snd_soc_dapm_dai_link] = 11,
99 [snd_soc_dapm_clock_supply] = 12,
100 [snd_soc_dapm_regulator_supply] = 12,
101 [snd_soc_dapm_supply] = 12,
102 [snd_soc_dapm_post] = 13,
103 };
104
105 static void pop_wait(u32 pop_time)
106 {
107 if (pop_time)
108 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
109 }
110
111 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
112 {
113 va_list args;
114 char *buf;
115
116 if (!pop_time)
117 return;
118
119 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
120 if (buf == NULL)
121 return;
122
123 va_start(args, fmt);
124 vsnprintf(buf, PAGE_SIZE, fmt, args);
125 dev_info(dev, "%s", buf);
126 va_end(args);
127
128 kfree(buf);
129 }
130
131 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
132 {
133 return !list_empty(&w->dirty);
134 }
135
136 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
137 {
138 if (!dapm_dirty_widget(w)) {
139 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
140 w->name, reason);
141 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
142 }
143 }
144 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
145
146 void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm)
147 {
148 struct snd_soc_card *card = dapm->card;
149 struct snd_soc_dapm_widget *w;
150
151 mutex_lock(&card->dapm_mutex);
152
153 list_for_each_entry(w, &card->widgets, list) {
154 switch (w->id) {
155 case snd_soc_dapm_input:
156 case snd_soc_dapm_output:
157 dapm_mark_dirty(w, "Rechecking inputs and outputs");
158 break;
159 default:
160 break;
161 }
162 }
163
164 mutex_unlock(&card->dapm_mutex);
165 }
166 EXPORT_SYMBOL_GPL(dapm_mark_io_dirty);
167
168 /* create a new dapm widget */
169 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
170 const struct snd_soc_dapm_widget *_widget)
171 {
172 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
173 }
174
175 /* get snd_card from DAPM context */
176 static inline struct snd_card *dapm_get_snd_card(
177 struct snd_soc_dapm_context *dapm)
178 {
179 if (dapm->codec)
180 return dapm->codec->card->snd_card;
181 else if (dapm->platform)
182 return dapm->platform->card->snd_card;
183 else
184 BUG();
185
186 /* unreachable */
187 return NULL;
188 }
189
190 /* get soc_card from DAPM context */
191 static inline struct snd_soc_card *dapm_get_soc_card(
192 struct snd_soc_dapm_context *dapm)
193 {
194 if (dapm->codec)
195 return dapm->codec->card;
196 else if (dapm->platform)
197 return dapm->platform->card;
198 else
199 BUG();
200
201 /* unreachable */
202 return NULL;
203 }
204
205 static void dapm_reset(struct snd_soc_card *card)
206 {
207 struct snd_soc_dapm_widget *w;
208
209 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
210
211 list_for_each_entry(w, &card->widgets, list) {
212 w->power_checked = false;
213 w->inputs = -1;
214 w->outputs = -1;
215 }
216 }
217
218 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
219 {
220 if (w->codec)
221 return snd_soc_read(w->codec, reg);
222 else if (w->platform)
223 return snd_soc_platform_read(w->platform, reg);
224
225 dev_err(w->dapm->dev, "ASoC: no valid widget read method\n");
226 return -1;
227 }
228
229 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
230 {
231 if (w->codec)
232 return snd_soc_write(w->codec, reg, val);
233 else if (w->platform)
234 return snd_soc_platform_write(w->platform, reg, val);
235
236 dev_err(w->dapm->dev, "ASoC: no valid widget write method\n");
237 return -1;
238 }
239
240 static inline void soc_widget_lock(struct snd_soc_dapm_widget *w)
241 {
242 if (w->codec && !w->codec->using_regmap)
243 mutex_lock(&w->codec->mutex);
244 else if (w->platform)
245 mutex_lock(&w->platform->mutex);
246 }
247
248 static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w)
249 {
250 if (w->codec && !w->codec->using_regmap)
251 mutex_unlock(&w->codec->mutex);
252 else if (w->platform)
253 mutex_unlock(&w->platform->mutex);
254 }
255
256 static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
257 unsigned short reg, unsigned int mask, unsigned int value)
258 {
259 bool change;
260 unsigned int old, new;
261 int ret;
262
263 if (w->codec && w->codec->using_regmap) {
264 ret = regmap_update_bits_check(w->codec->control_data,
265 reg, mask, value, &change);
266 if (ret != 0)
267 return ret;
268 } else {
269 soc_widget_lock(w);
270 ret = soc_widget_read(w, reg);
271 if (ret < 0) {
272 soc_widget_unlock(w);
273 return ret;
274 }
275
276 old = ret;
277 new = (old & ~mask) | (value & mask);
278 change = old != new;
279 if (change) {
280 ret = soc_widget_write(w, reg, new);
281 if (ret < 0) {
282 soc_widget_unlock(w);
283 return ret;
284 }
285 }
286 soc_widget_unlock(w);
287 }
288
289 return change;
290 }
291
292 /**
293 * snd_soc_dapm_set_bias_level - set the bias level for the system
294 * @dapm: DAPM context
295 * @level: level to configure
296 *
297 * Configure the bias (power) levels for the SoC audio device.
298 *
299 * Returns 0 for success else error.
300 */
301 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
302 enum snd_soc_bias_level level)
303 {
304 struct snd_soc_card *card = dapm->card;
305 int ret = 0;
306
307 trace_snd_soc_bias_level_start(card, level);
308
309 if (card && card->set_bias_level)
310 ret = card->set_bias_level(card, dapm, level);
311 if (ret != 0)
312 goto out;
313
314 if (dapm->codec) {
315 if (dapm->codec->driver->set_bias_level)
316 ret = dapm->codec->driver->set_bias_level(dapm->codec,
317 level);
318 else
319 dapm->bias_level = level;
320 } else if (!card || dapm != &card->dapm) {
321 dapm->bias_level = level;
322 }
323
324 if (ret != 0)
325 goto out;
326
327 if (card && card->set_bias_level_post)
328 ret = card->set_bias_level_post(card, dapm, level);
329 out:
330 trace_snd_soc_bias_level_done(card, level);
331
332 return ret;
333 }
334
335 /* set up initial codec paths */
336 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
337 struct snd_soc_dapm_path *p, int i)
338 {
339 switch (w->id) {
340 case snd_soc_dapm_switch:
341 case snd_soc_dapm_mixer:
342 case snd_soc_dapm_mixer_named_ctl: {
343 int val;
344 struct soc_mixer_control *mc = (struct soc_mixer_control *)
345 w->kcontrol_news[i].private_value;
346 unsigned int reg = mc->reg;
347 unsigned int shift = mc->shift;
348 int max = mc->max;
349 unsigned int mask = (1 << fls(max)) - 1;
350 unsigned int invert = mc->invert;
351
352 val = soc_widget_read(w, reg);
353 val = (val >> shift) & mask;
354 if (invert)
355 val = max - val;
356
357 p->connect = !!val;
358 }
359 break;
360 case snd_soc_dapm_mux: {
361 struct soc_enum *e = (struct soc_enum *)
362 w->kcontrol_news[i].private_value;
363 int val, item;
364
365 val = soc_widget_read(w, e->reg);
366 item = (val >> e->shift_l) & e->mask;
367
368 p->connect = 0;
369 for (i = 0; i < e->max; i++) {
370 if (!(strcmp(p->name, e->texts[i])) && item == i)
371 p->connect = 1;
372 }
373 }
374 break;
375 case snd_soc_dapm_virt_mux: {
376 struct soc_enum *e = (struct soc_enum *)
377 w->kcontrol_news[i].private_value;
378
379 p->connect = 0;
380 /* since a virtual mux has no backing registers to
381 * decide which path to connect, it will try to match
382 * with the first enumeration. This is to ensure
383 * that the default mux choice (the first) will be
384 * correctly powered up during initialization.
385 */
386 if (!strcmp(p->name, e->texts[0]))
387 p->connect = 1;
388 }
389 break;
390 case snd_soc_dapm_value_mux: {
391 struct soc_enum *e = (struct soc_enum *)
392 w->kcontrol_news[i].private_value;
393 int val, item;
394
395 val = soc_widget_read(w, e->reg);
396 val = (val >> e->shift_l) & e->mask;
397 for (item = 0; item < e->max; item++) {
398 if (val == e->values[item])
399 break;
400 }
401
402 p->connect = 0;
403 for (i = 0; i < e->max; i++) {
404 if (!(strcmp(p->name, e->texts[i])) && item == i)
405 p->connect = 1;
406 }
407 }
408 break;
409 /* does not affect routing - always connected */
410 case snd_soc_dapm_pga:
411 case snd_soc_dapm_out_drv:
412 case snd_soc_dapm_output:
413 case snd_soc_dapm_adc:
414 case snd_soc_dapm_input:
415 case snd_soc_dapm_siggen:
416 case snd_soc_dapm_dac:
417 case snd_soc_dapm_micbias:
418 case snd_soc_dapm_vmid:
419 case snd_soc_dapm_supply:
420 case snd_soc_dapm_regulator_supply:
421 case snd_soc_dapm_clock_supply:
422 case snd_soc_dapm_aif_in:
423 case snd_soc_dapm_aif_out:
424 case snd_soc_dapm_dai_in:
425 case snd_soc_dapm_dai_out:
426 case snd_soc_dapm_hp:
427 case snd_soc_dapm_mic:
428 case snd_soc_dapm_spk:
429 case snd_soc_dapm_line:
430 case snd_soc_dapm_dai_link:
431 p->connect = 1;
432 break;
433 /* does affect routing - dynamically connected */
434 case snd_soc_dapm_pre:
435 case snd_soc_dapm_post:
436 p->connect = 0;
437 break;
438 }
439 }
440
441 /* connect mux widget to its interconnecting audio paths */
442 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
443 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
444 struct snd_soc_dapm_path *path, const char *control_name,
445 const struct snd_kcontrol_new *kcontrol)
446 {
447 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
448 int i;
449
450 for (i = 0; i < e->max; i++) {
451 if (!(strcmp(control_name, e->texts[i]))) {
452 list_add(&path->list, &dapm->card->paths);
453 list_add(&path->list_sink, &dest->sources);
454 list_add(&path->list_source, &src->sinks);
455 path->name = (char*)e->texts[i];
456 dapm_set_path_status(dest, path, 0);
457 return 0;
458 }
459 }
460
461 return -ENODEV;
462 }
463
464 /* connect mixer widget to its interconnecting audio paths */
465 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
466 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
467 struct snd_soc_dapm_path *path, const char *control_name)
468 {
469 int i;
470
471 /* search for mixer kcontrol */
472 for (i = 0; i < dest->num_kcontrols; i++) {
473 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
474 list_add(&path->list, &dapm->card->paths);
475 list_add(&path->list_sink, &dest->sources);
476 list_add(&path->list_source, &src->sinks);
477 path->name = dest->kcontrol_news[i].name;
478 dapm_set_path_status(dest, path, i);
479 return 0;
480 }
481 }
482 return -ENODEV;
483 }
484
485 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
486 struct snd_soc_dapm_widget *kcontrolw,
487 const struct snd_kcontrol_new *kcontrol_new,
488 struct snd_kcontrol **kcontrol)
489 {
490 struct snd_soc_dapm_widget *w;
491 int i;
492
493 *kcontrol = NULL;
494
495 list_for_each_entry(w, &dapm->card->widgets, list) {
496 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
497 continue;
498 for (i = 0; i < w->num_kcontrols; i++) {
499 if (&w->kcontrol_news[i] == kcontrol_new) {
500 if (w->kcontrols)
501 *kcontrol = w->kcontrols[i];
502 return 1;
503 }
504 }
505 }
506
507 return 0;
508 }
509
510 /*
511 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
512 * create it. Either way, add the widget into the control's widget list
513 */
514 static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w,
515 int kci, struct snd_soc_dapm_path *path)
516 {
517 struct snd_soc_dapm_context *dapm = w->dapm;
518 struct snd_card *card = dapm->card->snd_card;
519 const char *prefix;
520 size_t prefix_len;
521 int shared;
522 struct snd_kcontrol *kcontrol;
523 struct snd_soc_dapm_widget_list *wlist;
524 int wlistentries;
525 size_t wlistsize;
526 bool wname_in_long_name, kcname_in_long_name;
527 size_t name_len;
528 char *long_name;
529 const char *name;
530 int ret;
531
532 if (dapm->codec)
533 prefix = dapm->codec->name_prefix;
534 else
535 prefix = NULL;
536
537 if (prefix)
538 prefix_len = strlen(prefix) + 1;
539 else
540 prefix_len = 0;
541
542 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
543 &kcontrol);
544
545 if (kcontrol) {
546 wlist = kcontrol->private_data;
547 wlistentries = wlist->num_widgets + 1;
548 } else {
549 wlist = NULL;
550 wlistentries = 1;
551 }
552
553 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
554 wlistentries * sizeof(struct snd_soc_dapm_widget *);
555 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
556 if (wlist == NULL) {
557 dev_err(dapm->dev, "ASoC: can't allocate widget list for %s\n",
558 w->name);
559 return -ENOMEM;
560 }
561 wlist->num_widgets = wlistentries;
562 wlist->widgets[wlistentries - 1] = w;
563
564 if (!kcontrol) {
565 if (shared) {
566 wname_in_long_name = false;
567 kcname_in_long_name = true;
568 } else {
569 switch (w->id) {
570 case snd_soc_dapm_switch:
571 case snd_soc_dapm_mixer:
572 wname_in_long_name = true;
573 kcname_in_long_name = true;
574 break;
575 case snd_soc_dapm_mixer_named_ctl:
576 wname_in_long_name = false;
577 kcname_in_long_name = true;
578 break;
579 case snd_soc_dapm_mux:
580 case snd_soc_dapm_virt_mux:
581 case snd_soc_dapm_value_mux:
582 wname_in_long_name = true;
583 kcname_in_long_name = false;
584 break;
585 default:
586 kfree(wlist);
587 return -EINVAL;
588 }
589 }
590
591 if (wname_in_long_name && kcname_in_long_name) {
592 name_len = strlen(w->name) - prefix_len + 1 +
593 strlen(w->kcontrol_news[kci].name) + 1;
594
595 long_name = kmalloc(name_len, GFP_KERNEL);
596 if (long_name == NULL) {
597 kfree(wlist);
598 return -ENOMEM;
599 }
600
601 /*
602 * The control will get a prefix from the control
603 * creation process but we're also using the same
604 * prefix for widgets so cut the prefix off the
605 * front of the widget name.
606 */
607 snprintf(long_name, name_len, "%s %s",
608 w->name + prefix_len,
609 w->kcontrol_news[kci].name);
610 long_name[name_len - 1] = '\0';
611
612 name = long_name;
613 } else if (wname_in_long_name) {
614 long_name = NULL;
615 name = w->name + prefix_len;
616 } else {
617 long_name = NULL;
618 name = w->kcontrol_news[kci].name;
619 }
620
621 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], wlist, name,
622 prefix);
623 ret = snd_ctl_add(card, kcontrol);
624 if (ret < 0) {
625 dev_err(dapm->dev,
626 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
627 w->name, name, ret);
628 kfree(wlist);
629 kfree(long_name);
630 return ret;
631 }
632
633 path->long_name = long_name;
634 }
635
636 kcontrol->private_data = wlist;
637 w->kcontrols[kci] = kcontrol;
638 path->kcontrol = kcontrol;
639
640 return 0;
641 }
642
643 /* create new dapm mixer control */
644 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
645 {
646 int i, ret;
647 struct snd_soc_dapm_path *path;
648
649 /* add kcontrol */
650 for (i = 0; i < w->num_kcontrols; i++) {
651 /* match name */
652 list_for_each_entry(path, &w->sources, list_sink) {
653 /* mixer/mux paths name must match control name */
654 if (path->name != (char *)w->kcontrol_news[i].name)
655 continue;
656
657 if (w->kcontrols[i]) {
658 path->kcontrol = w->kcontrols[i];
659 continue;
660 }
661
662 ret = dapm_create_or_share_mixmux_kcontrol(w, i, path);
663 if (ret < 0)
664 return ret;
665 }
666 }
667
668 return 0;
669 }
670
671 /* create new dapm mux control */
672 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
673 {
674 struct snd_soc_dapm_context *dapm = w->dapm;
675 struct snd_soc_dapm_path *path;
676 int ret;
677
678 if (w->num_kcontrols != 1) {
679 dev_err(dapm->dev,
680 "ASoC: mux %s has incorrect number of controls\n",
681 w->name);
682 return -EINVAL;
683 }
684
685 path = list_first_entry(&w->sources, struct snd_soc_dapm_path,
686 list_sink);
687 if (!path) {
688 dev_err(dapm->dev, "ASoC: mux %s has no paths\n", w->name);
689 return -EINVAL;
690 }
691
692 ret = dapm_create_or_share_mixmux_kcontrol(w, 0, path);
693 if (ret < 0)
694 return ret;
695
696 list_for_each_entry(path, &w->sources, list_sink)
697 path->kcontrol = w->kcontrols[0];
698
699 return 0;
700 }
701
702 /* create new dapm volume control */
703 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
704 {
705 if (w->num_kcontrols)
706 dev_err(w->dapm->dev,
707 "ASoC: PGA controls not supported: '%s'\n", w->name);
708
709 return 0;
710 }
711
712 /* reset 'walked' bit for each dapm path */
713 static void dapm_clear_walk_output(struct snd_soc_dapm_context *dapm,
714 struct list_head *sink)
715 {
716 struct snd_soc_dapm_path *p;
717
718 list_for_each_entry(p, sink, list_source) {
719 if (p->walked) {
720 p->walked = 0;
721 dapm_clear_walk_output(dapm, &p->sink->sinks);
722 }
723 }
724 }
725
726 static void dapm_clear_walk_input(struct snd_soc_dapm_context *dapm,
727 struct list_head *source)
728 {
729 struct snd_soc_dapm_path *p;
730
731 list_for_each_entry(p, source, list_sink) {
732 if (p->walked) {
733 p->walked = 0;
734 dapm_clear_walk_input(dapm, &p->source->sources);
735 }
736 }
737 }
738
739
740 /* We implement power down on suspend by checking the power state of
741 * the ALSA card - when we are suspending the ALSA state for the card
742 * is set to D3.
743 */
744 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
745 {
746 int level = snd_power_get_state(widget->dapm->card->snd_card);
747
748 switch (level) {
749 case SNDRV_CTL_POWER_D3hot:
750 case SNDRV_CTL_POWER_D3cold:
751 if (widget->ignore_suspend)
752 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
753 widget->name);
754 return widget->ignore_suspend;
755 default:
756 return 1;
757 }
758 }
759
760 /* add widget to list if it's not already in the list */
761 static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list,
762 struct snd_soc_dapm_widget *w)
763 {
764 struct snd_soc_dapm_widget_list *wlist;
765 int wlistsize, wlistentries, i;
766
767 if (*list == NULL)
768 return -EINVAL;
769
770 wlist = *list;
771
772 /* is this widget already in the list */
773 for (i = 0; i < wlist->num_widgets; i++) {
774 if (wlist->widgets[i] == w)
775 return 0;
776 }
777
778 /* allocate some new space */
779 wlistentries = wlist->num_widgets + 1;
780 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
781 wlistentries * sizeof(struct snd_soc_dapm_widget *);
782 *list = krealloc(wlist, wlistsize, GFP_KERNEL);
783 if (*list == NULL) {
784 dev_err(w->dapm->dev, "ASoC: can't allocate widget list for %s\n",
785 w->name);
786 return -ENOMEM;
787 }
788 wlist = *list;
789
790 /* insert the widget */
791 dev_dbg(w->dapm->dev, "ASoC: added %s in widget list pos %d\n",
792 w->name, wlist->num_widgets);
793
794 wlist->widgets[wlist->num_widgets] = w;
795 wlist->num_widgets++;
796 return 1;
797 }
798
799 /*
800 * Recursively check for a completed path to an active or physically connected
801 * output widget. Returns number of complete paths.
802 */
803 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
804 struct snd_soc_dapm_widget_list **list)
805 {
806 struct snd_soc_dapm_path *path;
807 int con = 0;
808
809 if (widget->outputs >= 0)
810 return widget->outputs;
811
812 DAPM_UPDATE_STAT(widget, path_checks);
813
814 switch (widget->id) {
815 case snd_soc_dapm_supply:
816 case snd_soc_dapm_regulator_supply:
817 case snd_soc_dapm_clock_supply:
818 return 0;
819 default:
820 break;
821 }
822
823 switch (widget->id) {
824 case snd_soc_dapm_adc:
825 case snd_soc_dapm_aif_out:
826 case snd_soc_dapm_dai_out:
827 if (widget->active) {
828 widget->outputs = snd_soc_dapm_suspend_check(widget);
829 return widget->outputs;
830 }
831 default:
832 break;
833 }
834
835 if (widget->connected) {
836 /* connected pin ? */
837 if (widget->id == snd_soc_dapm_output && !widget->ext) {
838 widget->outputs = snd_soc_dapm_suspend_check(widget);
839 return widget->outputs;
840 }
841
842 /* connected jack or spk ? */
843 if (widget->id == snd_soc_dapm_hp ||
844 widget->id == snd_soc_dapm_spk ||
845 (widget->id == snd_soc_dapm_line &&
846 !list_empty(&widget->sources))) {
847 widget->outputs = snd_soc_dapm_suspend_check(widget);
848 return widget->outputs;
849 }
850 }
851
852 list_for_each_entry(path, &widget->sinks, list_source) {
853 DAPM_UPDATE_STAT(widget, neighbour_checks);
854
855 if (path->weak)
856 continue;
857
858 if (path->walking)
859 return 1;
860
861 if (path->walked)
862 continue;
863
864 trace_snd_soc_dapm_output_path(widget, path);
865
866 if (path->sink && path->connect) {
867 path->walked = 1;
868 path->walking = 1;
869
870 /* do we need to add this widget to the list ? */
871 if (list) {
872 int err;
873 err = dapm_list_add_widget(list, path->sink);
874 if (err < 0) {
875 dev_err(widget->dapm->dev,
876 "ASoC: could not add widget %s\n",
877 widget->name);
878 path->walking = 0;
879 return con;
880 }
881 }
882
883 con += is_connected_output_ep(path->sink, list);
884
885 path->walking = 0;
886 }
887 }
888
889 widget->outputs = con;
890
891 return con;
892 }
893
894 /*
895 * Recursively check for a completed path to an active or physically connected
896 * input widget. Returns number of complete paths.
897 */
898 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
899 struct snd_soc_dapm_widget_list **list)
900 {
901 struct snd_soc_dapm_path *path;
902 int con = 0;
903
904 if (widget->inputs >= 0)
905 return widget->inputs;
906
907 DAPM_UPDATE_STAT(widget, path_checks);
908
909 switch (widget->id) {
910 case snd_soc_dapm_supply:
911 case snd_soc_dapm_regulator_supply:
912 case snd_soc_dapm_clock_supply:
913 return 0;
914 default:
915 break;
916 }
917
918 /* active stream ? */
919 switch (widget->id) {
920 case snd_soc_dapm_dac:
921 case snd_soc_dapm_aif_in:
922 case snd_soc_dapm_dai_in:
923 if (widget->active) {
924 widget->inputs = snd_soc_dapm_suspend_check(widget);
925 return widget->inputs;
926 }
927 default:
928 break;
929 }
930
931 if (widget->connected) {
932 /* connected pin ? */
933 if (widget->id == snd_soc_dapm_input && !widget->ext) {
934 widget->inputs = snd_soc_dapm_suspend_check(widget);
935 return widget->inputs;
936 }
937
938 /* connected VMID/Bias for lower pops */
939 if (widget->id == snd_soc_dapm_vmid) {
940 widget->inputs = snd_soc_dapm_suspend_check(widget);
941 return widget->inputs;
942 }
943
944 /* connected jack ? */
945 if (widget->id == snd_soc_dapm_mic ||
946 (widget->id == snd_soc_dapm_line &&
947 !list_empty(&widget->sinks))) {
948 widget->inputs = snd_soc_dapm_suspend_check(widget);
949 return widget->inputs;
950 }
951
952 /* signal generator */
953 if (widget->id == snd_soc_dapm_siggen) {
954 widget->inputs = snd_soc_dapm_suspend_check(widget);
955 return widget->inputs;
956 }
957 }
958
959 list_for_each_entry(path, &widget->sources, list_sink) {
960 DAPM_UPDATE_STAT(widget, neighbour_checks);
961
962 if (path->weak)
963 continue;
964
965 if (path->walking)
966 return 1;
967
968 if (path->walked)
969 continue;
970
971 trace_snd_soc_dapm_input_path(widget, path);
972
973 if (path->source && path->connect) {
974 path->walked = 1;
975 path->walking = 1;
976
977 /* do we need to add this widget to the list ? */
978 if (list) {
979 int err;
980 err = dapm_list_add_widget(list, path->source);
981 if (err < 0) {
982 dev_err(widget->dapm->dev,
983 "ASoC: could not add widget %s\n",
984 widget->name);
985 path->walking = 0;
986 return con;
987 }
988 }
989
990 con += is_connected_input_ep(path->source, list);
991
992 path->walking = 0;
993 }
994 }
995
996 widget->inputs = con;
997
998 return con;
999 }
1000
1001 /**
1002 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1003 * @dai: the soc DAI.
1004 * @stream: stream direction.
1005 * @list: list of active widgets for this stream.
1006 *
1007 * Queries DAPM graph as to whether an valid audio stream path exists for
1008 * the initial stream specified by name. This takes into account
1009 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1010 *
1011 * Returns the number of valid paths or negative error.
1012 */
1013 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1014 struct snd_soc_dapm_widget_list **list)
1015 {
1016 struct snd_soc_card *card = dai->card;
1017 int paths;
1018
1019 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1020 dapm_reset(card);
1021
1022 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1023 paths = is_connected_output_ep(dai->playback_widget, list);
1024 dapm_clear_walk_output(&card->dapm,
1025 &dai->playback_widget->sinks);
1026 } else {
1027 paths = is_connected_input_ep(dai->capture_widget, list);
1028 dapm_clear_walk_input(&card->dapm,
1029 &dai->capture_widget->sources);
1030 }
1031
1032 trace_snd_soc_dapm_connected(paths, stream);
1033 mutex_unlock(&card->dapm_mutex);
1034
1035 return paths;
1036 }
1037
1038 /*
1039 * Handler for generic register modifier widget.
1040 */
1041 int dapm_reg_event(struct snd_soc_dapm_widget *w,
1042 struct snd_kcontrol *kcontrol, int event)
1043 {
1044 unsigned int val;
1045
1046 if (SND_SOC_DAPM_EVENT_ON(event))
1047 val = w->on_val;
1048 else
1049 val = w->off_val;
1050
1051 soc_widget_update_bits_locked(w, -(w->reg + 1),
1052 w->mask << w->shift, val << w->shift);
1053
1054 return 0;
1055 }
1056 EXPORT_SYMBOL_GPL(dapm_reg_event);
1057
1058 /*
1059 * Handler for regulator supply widget.
1060 */
1061 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1062 struct snd_kcontrol *kcontrol, int event)
1063 {
1064 int ret;
1065
1066 if (SND_SOC_DAPM_EVENT_ON(event)) {
1067 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) {
1068 ret = regulator_allow_bypass(w->regulator, false);
1069 if (ret != 0)
1070 dev_warn(w->dapm->dev,
1071 "ASoC: Failed to bypass %s: %d\n",
1072 w->name, ret);
1073 }
1074
1075 return regulator_enable(w->regulator);
1076 } else {
1077 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) {
1078 ret = regulator_allow_bypass(w->regulator, true);
1079 if (ret != 0)
1080 dev_warn(w->dapm->dev,
1081 "ASoC: Failed to unbypass %s: %d\n",
1082 w->name, ret);
1083 }
1084
1085 return regulator_disable_deferred(w->regulator, w->shift);
1086 }
1087 }
1088 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1089
1090 /*
1091 * Handler for clock supply widget.
1092 */
1093 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1094 struct snd_kcontrol *kcontrol, int event)
1095 {
1096 if (!w->clk)
1097 return -EIO;
1098
1099 #ifdef CONFIG_HAVE_CLK
1100 if (SND_SOC_DAPM_EVENT_ON(event)) {
1101 return clk_prepare_enable(w->clk);
1102 } else {
1103 clk_disable_unprepare(w->clk);
1104 return 0;
1105 }
1106 #endif
1107 return 0;
1108 }
1109 EXPORT_SYMBOL_GPL(dapm_clock_event);
1110
1111 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1112 {
1113 if (w->power_checked)
1114 return w->new_power;
1115
1116 if (w->force)
1117 w->new_power = 1;
1118 else
1119 w->new_power = w->power_check(w);
1120
1121 w->power_checked = true;
1122
1123 return w->new_power;
1124 }
1125
1126 /* Generic check to see if a widget should be powered.
1127 */
1128 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1129 {
1130 int in, out;
1131
1132 DAPM_UPDATE_STAT(w, power_checks);
1133
1134 in = is_connected_input_ep(w, NULL);
1135 dapm_clear_walk_input(w->dapm, &w->sources);
1136 out = is_connected_output_ep(w, NULL);
1137 dapm_clear_walk_output(w->dapm, &w->sinks);
1138 return out != 0 && in != 0;
1139 }
1140
1141 /* Check to see if an ADC has power */
1142 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
1143 {
1144 int in;
1145
1146 DAPM_UPDATE_STAT(w, power_checks);
1147
1148 if (w->active) {
1149 in = is_connected_input_ep(w, NULL);
1150 dapm_clear_walk_input(w->dapm, &w->sources);
1151 return in != 0;
1152 } else {
1153 return dapm_generic_check_power(w);
1154 }
1155 }
1156
1157 /* Check to see if a DAC has power */
1158 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
1159 {
1160 int out;
1161
1162 DAPM_UPDATE_STAT(w, power_checks);
1163
1164 if (w->active) {
1165 out = is_connected_output_ep(w, NULL);
1166 dapm_clear_walk_output(w->dapm, &w->sinks);
1167 return out != 0;
1168 } else {
1169 return dapm_generic_check_power(w);
1170 }
1171 }
1172
1173 /* Check to see if a power supply is needed */
1174 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1175 {
1176 struct snd_soc_dapm_path *path;
1177
1178 DAPM_UPDATE_STAT(w, power_checks);
1179
1180 /* Check if one of our outputs is connected */
1181 list_for_each_entry(path, &w->sinks, list_source) {
1182 DAPM_UPDATE_STAT(w, neighbour_checks);
1183
1184 if (path->weak)
1185 continue;
1186
1187 if (path->connected &&
1188 !path->connected(path->source, path->sink))
1189 continue;
1190
1191 if (!path->sink)
1192 continue;
1193
1194 if (dapm_widget_power_check(path->sink))
1195 return 1;
1196 }
1197
1198 return 0;
1199 }
1200
1201 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1202 {
1203 return 1;
1204 }
1205
1206 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1207 struct snd_soc_dapm_widget *b,
1208 bool power_up)
1209 {
1210 int *sort;
1211
1212 if (power_up)
1213 sort = dapm_up_seq;
1214 else
1215 sort = dapm_down_seq;
1216
1217 if (sort[a->id] != sort[b->id])
1218 return sort[a->id] - sort[b->id];
1219 if (a->subseq != b->subseq) {
1220 if (power_up)
1221 return a->subseq - b->subseq;
1222 else
1223 return b->subseq - a->subseq;
1224 }
1225 if (a->reg != b->reg)
1226 return a->reg - b->reg;
1227 if (a->dapm != b->dapm)
1228 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1229
1230 return 0;
1231 }
1232
1233 /* Insert a widget in order into a DAPM power sequence. */
1234 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1235 struct list_head *list,
1236 bool power_up)
1237 {
1238 struct snd_soc_dapm_widget *w;
1239
1240 list_for_each_entry(w, list, power_list)
1241 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1242 list_add_tail(&new_widget->power_list, &w->power_list);
1243 return;
1244 }
1245
1246 list_add_tail(&new_widget->power_list, list);
1247 }
1248
1249 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
1250 struct snd_soc_dapm_widget *w, int event)
1251 {
1252 struct snd_soc_card *card = dapm->card;
1253 const char *ev_name;
1254 int power, ret;
1255
1256 switch (event) {
1257 case SND_SOC_DAPM_PRE_PMU:
1258 ev_name = "PRE_PMU";
1259 power = 1;
1260 break;
1261 case SND_SOC_DAPM_POST_PMU:
1262 ev_name = "POST_PMU";
1263 power = 1;
1264 break;
1265 case SND_SOC_DAPM_PRE_PMD:
1266 ev_name = "PRE_PMD";
1267 power = 0;
1268 break;
1269 case SND_SOC_DAPM_POST_PMD:
1270 ev_name = "POST_PMD";
1271 power = 0;
1272 break;
1273 default:
1274 BUG();
1275 return;
1276 }
1277
1278 if (w->power != power)
1279 return;
1280
1281 if (w->event && (w->event_flags & event)) {
1282 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
1283 w->name, ev_name);
1284 trace_snd_soc_dapm_widget_event_start(w, event);
1285 ret = w->event(w, NULL, event);
1286 trace_snd_soc_dapm_widget_event_done(w, event);
1287 if (ret < 0)
1288 dev_err(dapm->dev, "ASoC: %s: %s event failed: %d\n",
1289 ev_name, w->name, ret);
1290 }
1291 }
1292
1293 /* Apply the coalesced changes from a DAPM sequence */
1294 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
1295 struct list_head *pending)
1296 {
1297 struct snd_soc_card *card = dapm->card;
1298 struct snd_soc_dapm_widget *w;
1299 int reg, power;
1300 unsigned int value = 0;
1301 unsigned int mask = 0;
1302 unsigned int cur_mask;
1303
1304 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1305 power_list)->reg;
1306
1307 list_for_each_entry(w, pending, power_list) {
1308 cur_mask = 1 << w->shift;
1309 BUG_ON(reg != w->reg);
1310
1311 if (w->invert)
1312 power = !w->power;
1313 else
1314 power = w->power;
1315
1316 mask |= cur_mask;
1317 if (power)
1318 value |= cur_mask;
1319
1320 pop_dbg(dapm->dev, card->pop_time,
1321 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1322 w->name, reg, value, mask);
1323
1324 /* Check for events */
1325 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1326 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1327 }
1328
1329 if (reg >= 0) {
1330 /* Any widget will do, they should all be updating the
1331 * same register.
1332 */
1333 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1334 power_list);
1335
1336 pop_dbg(dapm->dev, card->pop_time,
1337 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1338 value, mask, reg, card->pop_time);
1339 pop_wait(card->pop_time);
1340 soc_widget_update_bits_locked(w, reg, mask, value);
1341 }
1342
1343 list_for_each_entry(w, pending, power_list) {
1344 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1345 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1346 }
1347 }
1348
1349 /* Apply a DAPM power sequence.
1350 *
1351 * We walk over a pre-sorted list of widgets to apply power to. In
1352 * order to minimise the number of writes to the device required
1353 * multiple widgets will be updated in a single write where possible.
1354 * Currently anything that requires more than a single write is not
1355 * handled.
1356 */
1357 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1358 struct list_head *list, int event, bool power_up)
1359 {
1360 struct snd_soc_dapm_widget *w, *n;
1361 LIST_HEAD(pending);
1362 int cur_sort = -1;
1363 int cur_subseq = -1;
1364 int cur_reg = SND_SOC_NOPM;
1365 struct snd_soc_dapm_context *cur_dapm = NULL;
1366 int ret, i;
1367 int *sort;
1368
1369 if (power_up)
1370 sort = dapm_up_seq;
1371 else
1372 sort = dapm_down_seq;
1373
1374 list_for_each_entry_safe(w, n, list, power_list) {
1375 ret = 0;
1376
1377 /* Do we need to apply any queued changes? */
1378 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1379 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1380 if (!list_empty(&pending))
1381 dapm_seq_run_coalesced(cur_dapm, &pending);
1382
1383 if (cur_dapm && cur_dapm->seq_notifier) {
1384 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1385 if (sort[i] == cur_sort)
1386 cur_dapm->seq_notifier(cur_dapm,
1387 i,
1388 cur_subseq);
1389 }
1390
1391 INIT_LIST_HEAD(&pending);
1392 cur_sort = -1;
1393 cur_subseq = INT_MIN;
1394 cur_reg = SND_SOC_NOPM;
1395 cur_dapm = NULL;
1396 }
1397
1398 switch (w->id) {
1399 case snd_soc_dapm_pre:
1400 if (!w->event)
1401 list_for_each_entry_safe_continue(w, n, list,
1402 power_list);
1403
1404 if (event == SND_SOC_DAPM_STREAM_START)
1405 ret = w->event(w,
1406 NULL, SND_SOC_DAPM_PRE_PMU);
1407 else if (event == SND_SOC_DAPM_STREAM_STOP)
1408 ret = w->event(w,
1409 NULL, SND_SOC_DAPM_PRE_PMD);
1410 break;
1411
1412 case snd_soc_dapm_post:
1413 if (!w->event)
1414 list_for_each_entry_safe_continue(w, n, list,
1415 power_list);
1416
1417 if (event == SND_SOC_DAPM_STREAM_START)
1418 ret = w->event(w,
1419 NULL, SND_SOC_DAPM_POST_PMU);
1420 else if (event == SND_SOC_DAPM_STREAM_STOP)
1421 ret = w->event(w,
1422 NULL, SND_SOC_DAPM_POST_PMD);
1423 break;
1424
1425 default:
1426 /* Queue it up for application */
1427 cur_sort = sort[w->id];
1428 cur_subseq = w->subseq;
1429 cur_reg = w->reg;
1430 cur_dapm = w->dapm;
1431 list_move(&w->power_list, &pending);
1432 break;
1433 }
1434
1435 if (ret < 0)
1436 dev_err(w->dapm->dev,
1437 "ASoC: Failed to apply widget power: %d\n", ret);
1438 }
1439
1440 if (!list_empty(&pending))
1441 dapm_seq_run_coalesced(cur_dapm, &pending);
1442
1443 if (cur_dapm && cur_dapm->seq_notifier) {
1444 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1445 if (sort[i] == cur_sort)
1446 cur_dapm->seq_notifier(cur_dapm,
1447 i, cur_subseq);
1448 }
1449 }
1450
1451 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1452 {
1453 struct snd_soc_dapm_update *update = dapm->update;
1454 struct snd_soc_dapm_widget *w;
1455 int ret;
1456
1457 if (!update)
1458 return;
1459
1460 w = update->widget;
1461
1462 if (w->event &&
1463 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1464 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1465 if (ret != 0)
1466 dev_err(dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1467 w->name, ret);
1468 }
1469
1470 ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
1471 update->val);
1472 if (ret < 0)
1473 dev_err(dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1474 w->name, ret);
1475
1476 if (w->event &&
1477 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1478 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1479 if (ret != 0)
1480 dev_err(dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1481 w->name, ret);
1482 }
1483 }
1484
1485 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1486 * they're changing state.
1487 */
1488 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1489 {
1490 struct snd_soc_dapm_context *d = data;
1491 int ret;
1492
1493 /* If we're off and we're not supposed to be go into STANDBY */
1494 if (d->bias_level == SND_SOC_BIAS_OFF &&
1495 d->target_bias_level != SND_SOC_BIAS_OFF) {
1496 if (d->dev)
1497 pm_runtime_get_sync(d->dev);
1498
1499 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1500 if (ret != 0)
1501 dev_err(d->dev,
1502 "ASoC: Failed to turn on bias: %d\n", ret);
1503 }
1504
1505 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1506 if (d->bias_level != d->target_bias_level) {
1507 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1508 if (ret != 0)
1509 dev_err(d->dev,
1510 "ASoC: Failed to prepare bias: %d\n", ret);
1511 }
1512 }
1513
1514 /* Async callback run prior to DAPM sequences - brings to their final
1515 * state.
1516 */
1517 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1518 {
1519 struct snd_soc_dapm_context *d = data;
1520 int ret;
1521
1522 /* If we just powered the last thing off drop to standby bias */
1523 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1524 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1525 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1526 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1527 if (ret != 0)
1528 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1529 ret);
1530 }
1531
1532 /* If we're in standby and can support bias off then do that */
1533 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1534 d->target_bias_level == SND_SOC_BIAS_OFF) {
1535 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1536 if (ret != 0)
1537 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1538 ret);
1539
1540 if (d->dev)
1541 pm_runtime_put(d->dev);
1542 }
1543
1544 /* If we just powered up then move to active bias */
1545 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1546 d->target_bias_level == SND_SOC_BIAS_ON) {
1547 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1548 if (ret != 0)
1549 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1550 ret);
1551 }
1552 }
1553
1554 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1555 bool power, bool connect)
1556 {
1557 /* If a connection is being made or broken then that update
1558 * will have marked the peer dirty, otherwise the widgets are
1559 * not connected and this update has no impact. */
1560 if (!connect)
1561 return;
1562
1563 /* If the peer is already in the state we're moving to then we
1564 * won't have an impact on it. */
1565 if (power != peer->power)
1566 dapm_mark_dirty(peer, "peer state change");
1567 }
1568
1569 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1570 struct list_head *up_list,
1571 struct list_head *down_list)
1572 {
1573 struct snd_soc_dapm_path *path;
1574
1575 if (w->power == power)
1576 return;
1577
1578 trace_snd_soc_dapm_widget_power(w, power);
1579
1580 /* If we changed our power state perhaps our neigbours changed
1581 * also.
1582 */
1583 list_for_each_entry(path, &w->sources, list_sink) {
1584 if (path->source) {
1585 dapm_widget_set_peer_power(path->source, power,
1586 path->connect);
1587 }
1588 }
1589 switch (w->id) {
1590 case snd_soc_dapm_supply:
1591 case snd_soc_dapm_regulator_supply:
1592 case snd_soc_dapm_clock_supply:
1593 /* Supplies can't affect their outputs, only their inputs */
1594 break;
1595 default:
1596 list_for_each_entry(path, &w->sinks, list_source) {
1597 if (path->sink) {
1598 dapm_widget_set_peer_power(path->sink, power,
1599 path->connect);
1600 }
1601 }
1602 break;
1603 }
1604
1605 if (power)
1606 dapm_seq_insert(w, up_list, true);
1607 else
1608 dapm_seq_insert(w, down_list, false);
1609
1610 w->power = power;
1611 }
1612
1613 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1614 struct list_head *up_list,
1615 struct list_head *down_list)
1616 {
1617 int power;
1618
1619 switch (w->id) {
1620 case snd_soc_dapm_pre:
1621 dapm_seq_insert(w, down_list, false);
1622 break;
1623 case snd_soc_dapm_post:
1624 dapm_seq_insert(w, up_list, true);
1625 break;
1626
1627 default:
1628 power = dapm_widget_power_check(w);
1629
1630 dapm_widget_set_power(w, power, up_list, down_list);
1631 break;
1632 }
1633 }
1634
1635 /*
1636 * Scan each dapm widget for complete audio path.
1637 * A complete path is a route that has valid endpoints i.e.:-
1638 *
1639 * o DAC to output pin.
1640 * o Input Pin to ADC.
1641 * o Input pin to Output pin (bypass, sidetone)
1642 * o DAC to ADC (loopback).
1643 */
1644 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1645 {
1646 struct snd_soc_card *card = dapm->card;
1647 struct snd_soc_dapm_widget *w;
1648 struct snd_soc_dapm_context *d;
1649 LIST_HEAD(up_list);
1650 LIST_HEAD(down_list);
1651 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1652 enum snd_soc_bias_level bias;
1653
1654 trace_snd_soc_dapm_start(card);
1655
1656 list_for_each_entry(d, &card->dapm_list, list) {
1657 if (d->idle_bias_off)
1658 d->target_bias_level = SND_SOC_BIAS_OFF;
1659 else
1660 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1661 }
1662
1663 dapm_reset(card);
1664
1665 /* Check which widgets we need to power and store them in
1666 * lists indicating if they should be powered up or down. We
1667 * only check widgets that have been flagged as dirty but note
1668 * that new widgets may be added to the dirty list while we
1669 * iterate.
1670 */
1671 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1672 dapm_power_one_widget(w, &up_list, &down_list);
1673 }
1674
1675 list_for_each_entry(w, &card->widgets, list) {
1676 switch (w->id) {
1677 case snd_soc_dapm_pre:
1678 case snd_soc_dapm_post:
1679 /* These widgets always need to be powered */
1680 break;
1681 default:
1682 list_del_init(&w->dirty);
1683 break;
1684 }
1685
1686 if (w->power) {
1687 d = w->dapm;
1688
1689 /* Supplies and micbiases only bring the
1690 * context up to STANDBY as unless something
1691 * else is active and passing audio they
1692 * generally don't require full power. Signal
1693 * generators are virtual pins and have no
1694 * power impact themselves.
1695 */
1696 switch (w->id) {
1697 case snd_soc_dapm_siggen:
1698 break;
1699 case snd_soc_dapm_supply:
1700 case snd_soc_dapm_regulator_supply:
1701 case snd_soc_dapm_clock_supply:
1702 case snd_soc_dapm_micbias:
1703 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1704 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1705 break;
1706 default:
1707 d->target_bias_level = SND_SOC_BIAS_ON;
1708 break;
1709 }
1710 }
1711
1712 }
1713
1714 /* Force all contexts in the card to the same bias state if
1715 * they're not ground referenced.
1716 */
1717 bias = SND_SOC_BIAS_OFF;
1718 list_for_each_entry(d, &card->dapm_list, list)
1719 if (d->target_bias_level > bias)
1720 bias = d->target_bias_level;
1721 list_for_each_entry(d, &card->dapm_list, list)
1722 if (!d->idle_bias_off)
1723 d->target_bias_level = bias;
1724
1725 trace_snd_soc_dapm_walk_done(card);
1726
1727 /* Run all the bias changes in parallel */
1728 list_for_each_entry(d, &dapm->card->dapm_list, list)
1729 async_schedule_domain(dapm_pre_sequence_async, d,
1730 &async_domain);
1731 async_synchronize_full_domain(&async_domain);
1732
1733 /* Power down widgets first; try to avoid amplifying pops. */
1734 dapm_seq_run(dapm, &down_list, event, false);
1735
1736 dapm_widget_update(dapm);
1737
1738 /* Now power up. */
1739 dapm_seq_run(dapm, &up_list, event, true);
1740
1741 /* Run all the bias changes in parallel */
1742 list_for_each_entry(d, &dapm->card->dapm_list, list)
1743 async_schedule_domain(dapm_post_sequence_async, d,
1744 &async_domain);
1745 async_synchronize_full_domain(&async_domain);
1746
1747 /* do we need to notify any clients that DAPM event is complete */
1748 list_for_each_entry(d, &card->dapm_list, list) {
1749 if (d->stream_event)
1750 d->stream_event(d, event);
1751 }
1752
1753 pop_dbg(dapm->dev, card->pop_time,
1754 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1755 pop_wait(card->pop_time);
1756
1757 trace_snd_soc_dapm_done(card);
1758
1759 return 0;
1760 }
1761
1762 #ifdef CONFIG_DEBUG_FS
1763 static ssize_t dapm_widget_power_read_file(struct file *file,
1764 char __user *user_buf,
1765 size_t count, loff_t *ppos)
1766 {
1767 struct snd_soc_dapm_widget *w = file->private_data;
1768 char *buf;
1769 int in, out;
1770 ssize_t ret;
1771 struct snd_soc_dapm_path *p = NULL;
1772
1773 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1774 if (!buf)
1775 return -ENOMEM;
1776
1777 in = is_connected_input_ep(w, NULL);
1778 dapm_clear_walk_input(w->dapm, &w->sources);
1779 out = is_connected_output_ep(w, NULL);
1780 dapm_clear_walk_output(w->dapm, &w->sinks);
1781
1782 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1783 w->name, w->power ? "On" : "Off",
1784 w->force ? " (forced)" : "", in, out);
1785
1786 if (w->reg >= 0)
1787 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1788 " - R%d(0x%x) bit %d",
1789 w->reg, w->reg, w->shift);
1790
1791 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1792
1793 if (w->sname)
1794 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1795 w->sname,
1796 w->active ? "active" : "inactive");
1797
1798 list_for_each_entry(p, &w->sources, list_sink) {
1799 if (p->connected && !p->connected(w, p->sink))
1800 continue;
1801
1802 if (p->connect)
1803 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1804 " in \"%s\" \"%s\"\n",
1805 p->name ? p->name : "static",
1806 p->source->name);
1807 }
1808 list_for_each_entry(p, &w->sinks, list_source) {
1809 if (p->connected && !p->connected(w, p->sink))
1810 continue;
1811
1812 if (p->connect)
1813 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1814 " out \"%s\" \"%s\"\n",
1815 p->name ? p->name : "static",
1816 p->sink->name);
1817 }
1818
1819 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1820
1821 kfree(buf);
1822 return ret;
1823 }
1824
1825 static const struct file_operations dapm_widget_power_fops = {
1826 .open = simple_open,
1827 .read = dapm_widget_power_read_file,
1828 .llseek = default_llseek,
1829 };
1830
1831 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1832 size_t count, loff_t *ppos)
1833 {
1834 struct snd_soc_dapm_context *dapm = file->private_data;
1835 char *level;
1836
1837 switch (dapm->bias_level) {
1838 case SND_SOC_BIAS_ON:
1839 level = "On\n";
1840 break;
1841 case SND_SOC_BIAS_PREPARE:
1842 level = "Prepare\n";
1843 break;
1844 case SND_SOC_BIAS_STANDBY:
1845 level = "Standby\n";
1846 break;
1847 case SND_SOC_BIAS_OFF:
1848 level = "Off\n";
1849 break;
1850 default:
1851 BUG();
1852 level = "Unknown\n";
1853 break;
1854 }
1855
1856 return simple_read_from_buffer(user_buf, count, ppos, level,
1857 strlen(level));
1858 }
1859
1860 static const struct file_operations dapm_bias_fops = {
1861 .open = simple_open,
1862 .read = dapm_bias_read_file,
1863 .llseek = default_llseek,
1864 };
1865
1866 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1867 struct dentry *parent)
1868 {
1869 struct dentry *d;
1870
1871 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1872
1873 if (!dapm->debugfs_dapm) {
1874 dev_warn(dapm->dev,
1875 "ASoC: Failed to create DAPM debugfs directory\n");
1876 return;
1877 }
1878
1879 d = debugfs_create_file("bias_level", 0444,
1880 dapm->debugfs_dapm, dapm,
1881 &dapm_bias_fops);
1882 if (!d)
1883 dev_warn(dapm->dev,
1884 "ASoC: Failed to create bias level debugfs file\n");
1885 }
1886
1887 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1888 {
1889 struct snd_soc_dapm_context *dapm = w->dapm;
1890 struct dentry *d;
1891
1892 if (!dapm->debugfs_dapm || !w->name)
1893 return;
1894
1895 d = debugfs_create_file(w->name, 0444,
1896 dapm->debugfs_dapm, w,
1897 &dapm_widget_power_fops);
1898 if (!d)
1899 dev_warn(w->dapm->dev,
1900 "ASoC: Failed to create %s debugfs file\n",
1901 w->name);
1902 }
1903
1904 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1905 {
1906 debugfs_remove_recursive(dapm->debugfs_dapm);
1907 }
1908
1909 #else
1910 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1911 struct dentry *parent)
1912 {
1913 }
1914
1915 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1916 {
1917 }
1918
1919 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1920 {
1921 }
1922
1923 #endif
1924
1925 /* test and update the power status of a mux widget */
1926 static int soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1927 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1928 {
1929 struct snd_soc_dapm_path *path;
1930 int found = 0;
1931
1932 if (widget->id != snd_soc_dapm_mux &&
1933 widget->id != snd_soc_dapm_virt_mux &&
1934 widget->id != snd_soc_dapm_value_mux)
1935 return -ENODEV;
1936
1937 /* find dapm widget path assoc with kcontrol */
1938 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1939 if (path->kcontrol != kcontrol)
1940 continue;
1941
1942 if (!path->name || !e->texts[mux])
1943 continue;
1944
1945 found = 1;
1946 /* we now need to match the string in the enum to the path */
1947 if (!(strcmp(path->name, e->texts[mux]))) {
1948 path->connect = 1; /* new connection */
1949 dapm_mark_dirty(path->source, "mux connection");
1950 } else {
1951 if (path->connect)
1952 dapm_mark_dirty(path->source,
1953 "mux disconnection");
1954 path->connect = 0; /* old connection must be powered down */
1955 }
1956 }
1957
1958 if (found) {
1959 dapm_mark_dirty(widget, "mux change");
1960 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1961 }
1962
1963 return found;
1964 }
1965
1966 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1967 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1968 {
1969 struct snd_soc_card *card = widget->dapm->card;
1970 int ret;
1971
1972 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1973 ret = soc_dapm_mux_update_power(widget, kcontrol, mux, e);
1974 mutex_unlock(&card->dapm_mutex);
1975 if (ret > 0)
1976 soc_dpcm_runtime_update(widget);
1977 return ret;
1978 }
1979 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
1980
1981 /* test and update the power status of a mixer or switch widget */
1982 static int soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1983 struct snd_kcontrol *kcontrol, int connect)
1984 {
1985 struct snd_soc_dapm_path *path;
1986 int found = 0;
1987
1988 if (widget->id != snd_soc_dapm_mixer &&
1989 widget->id != snd_soc_dapm_mixer_named_ctl &&
1990 widget->id != snd_soc_dapm_switch)
1991 return -ENODEV;
1992
1993 /* find dapm widget path assoc with kcontrol */
1994 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1995 if (path->kcontrol != kcontrol)
1996 continue;
1997
1998 /* found, now check type */
1999 found = 1;
2000 path->connect = connect;
2001 dapm_mark_dirty(path->source, "mixer connection");
2002 }
2003
2004 if (found) {
2005 dapm_mark_dirty(widget, "mixer update");
2006 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
2007 }
2008
2009 return found;
2010 }
2011
2012 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
2013 struct snd_kcontrol *kcontrol, int connect)
2014 {
2015 struct snd_soc_card *card = widget->dapm->card;
2016 int ret;
2017
2018 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2019 ret = soc_dapm_mixer_update_power(widget, kcontrol, connect);
2020 mutex_unlock(&card->dapm_mutex);
2021 if (ret > 0)
2022 soc_dpcm_runtime_update(widget);
2023 return ret;
2024 }
2025 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2026
2027 /* show dapm widget status in sys fs */
2028 static ssize_t dapm_widget_show(struct device *dev,
2029 struct device_attribute *attr, char *buf)
2030 {
2031 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2032 struct snd_soc_codec *codec =rtd->codec;
2033 struct snd_soc_dapm_widget *w;
2034 int count = 0;
2035 char *state = "not set";
2036
2037 list_for_each_entry(w, &codec->card->widgets, list) {
2038 if (w->dapm != &codec->dapm)
2039 continue;
2040
2041 /* only display widgets that burnm power */
2042 switch (w->id) {
2043 case snd_soc_dapm_hp:
2044 case snd_soc_dapm_mic:
2045 case snd_soc_dapm_spk:
2046 case snd_soc_dapm_line:
2047 case snd_soc_dapm_micbias:
2048 case snd_soc_dapm_dac:
2049 case snd_soc_dapm_adc:
2050 case snd_soc_dapm_pga:
2051 case snd_soc_dapm_out_drv:
2052 case snd_soc_dapm_mixer:
2053 case snd_soc_dapm_mixer_named_ctl:
2054 case snd_soc_dapm_supply:
2055 case snd_soc_dapm_regulator_supply:
2056 case snd_soc_dapm_clock_supply:
2057 if (w->name)
2058 count += sprintf(buf + count, "%s: %s\n",
2059 w->name, w->power ? "On":"Off");
2060 break;
2061 default:
2062 break;
2063 }
2064 }
2065
2066 switch (codec->dapm.bias_level) {
2067 case SND_SOC_BIAS_ON:
2068 state = "On";
2069 break;
2070 case SND_SOC_BIAS_PREPARE:
2071 state = "Prepare";
2072 break;
2073 case SND_SOC_BIAS_STANDBY:
2074 state = "Standby";
2075 break;
2076 case SND_SOC_BIAS_OFF:
2077 state = "Off";
2078 break;
2079 }
2080 count += sprintf(buf + count, "PM State: %s\n", state);
2081
2082 return count;
2083 }
2084
2085 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2086
2087 int snd_soc_dapm_sys_add(struct device *dev)
2088 {
2089 return device_create_file(dev, &dev_attr_dapm_widget);
2090 }
2091
2092 static void snd_soc_dapm_sys_remove(struct device *dev)
2093 {
2094 device_remove_file(dev, &dev_attr_dapm_widget);
2095 }
2096
2097 /* free all dapm widgets and resources */
2098 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2099 {
2100 struct snd_soc_dapm_widget *w, *next_w;
2101 struct snd_soc_dapm_path *p, *next_p;
2102
2103 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2104 if (w->dapm != dapm)
2105 continue;
2106 list_del(&w->list);
2107 /*
2108 * remove source and sink paths associated to this widget.
2109 * While removing the path, remove reference to it from both
2110 * source and sink widgets so that path is removed only once.
2111 */
2112 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
2113 list_del(&p->list_sink);
2114 list_del(&p->list_source);
2115 list_del(&p->list);
2116 kfree(p->long_name);
2117 kfree(p);
2118 }
2119 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
2120 list_del(&p->list_sink);
2121 list_del(&p->list_source);
2122 list_del(&p->list);
2123 kfree(p->long_name);
2124 kfree(p);
2125 }
2126 kfree(w->kcontrols);
2127 kfree(w->name);
2128 kfree(w);
2129 }
2130 }
2131
2132 static struct snd_soc_dapm_widget *dapm_find_widget(
2133 struct snd_soc_dapm_context *dapm, const char *pin,
2134 bool search_other_contexts)
2135 {
2136 struct snd_soc_dapm_widget *w;
2137 struct snd_soc_dapm_widget *fallback = NULL;
2138
2139 list_for_each_entry(w, &dapm->card->widgets, list) {
2140 if (!strcmp(w->name, pin)) {
2141 if (w->dapm == dapm)
2142 return w;
2143 else
2144 fallback = w;
2145 }
2146 }
2147
2148 if (search_other_contexts)
2149 return fallback;
2150
2151 return NULL;
2152 }
2153
2154 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2155 const char *pin, int status)
2156 {
2157 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2158
2159 if (!w) {
2160 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2161 return -EINVAL;
2162 }
2163
2164 if (w->connected != status)
2165 dapm_mark_dirty(w, "pin configuration");
2166
2167 w->connected = status;
2168 if (status == 0)
2169 w->force = 0;
2170
2171 return 0;
2172 }
2173
2174 /**
2175 * snd_soc_dapm_sync - scan and power dapm paths
2176 * @dapm: DAPM context
2177 *
2178 * Walks all dapm audio paths and powers widgets according to their
2179 * stream or path usage.
2180 *
2181 * Returns 0 for success.
2182 */
2183 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2184 {
2185 int ret;
2186
2187 /*
2188 * Suppress early reports (eg, jacks syncing their state) to avoid
2189 * silly DAPM runs during card startup.
2190 */
2191 if (!dapm->card || !dapm->card->instantiated)
2192 return 0;
2193
2194 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2195 ret = dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2196 mutex_unlock(&dapm->card->dapm_mutex);
2197 return ret;
2198 }
2199 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2200
2201 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2202 const struct snd_soc_dapm_route *route)
2203 {
2204 struct snd_soc_dapm_path *path;
2205 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2206 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2207 const char *sink;
2208 const char *control = route->control;
2209 const char *source;
2210 char prefixed_sink[80];
2211 char prefixed_source[80];
2212 int ret = 0;
2213
2214 if (dapm->codec && dapm->codec->name_prefix) {
2215 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2216 dapm->codec->name_prefix, route->sink);
2217 sink = prefixed_sink;
2218 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2219 dapm->codec->name_prefix, route->source);
2220 source = prefixed_source;
2221 } else {
2222 sink = route->sink;
2223 source = route->source;
2224 }
2225
2226 /*
2227 * find src and dest widgets over all widgets but favor a widget from
2228 * current DAPM context
2229 */
2230 list_for_each_entry(w, &dapm->card->widgets, list) {
2231 if (!wsink && !(strcmp(w->name, sink))) {
2232 wtsink = w;
2233 if (w->dapm == dapm)
2234 wsink = w;
2235 continue;
2236 }
2237 if (!wsource && !(strcmp(w->name, source))) {
2238 wtsource = w;
2239 if (w->dapm == dapm)
2240 wsource = w;
2241 }
2242 }
2243 /* use widget from another DAPM context if not found from this */
2244 if (!wsink)
2245 wsink = wtsink;
2246 if (!wsource)
2247 wsource = wtsource;
2248
2249 if (wsource == NULL) {
2250 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2251 route->source);
2252 return -ENODEV;
2253 }
2254 if (wsink == NULL) {
2255 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2256 route->sink);
2257 return -ENODEV;
2258 }
2259
2260 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2261 if (!path)
2262 return -ENOMEM;
2263
2264 path->source = wsource;
2265 path->sink = wsink;
2266 path->connected = route->connected;
2267 INIT_LIST_HEAD(&path->list);
2268 INIT_LIST_HEAD(&path->list_source);
2269 INIT_LIST_HEAD(&path->list_sink);
2270
2271 /* check for external widgets */
2272 if (wsink->id == snd_soc_dapm_input) {
2273 if (wsource->id == snd_soc_dapm_micbias ||
2274 wsource->id == snd_soc_dapm_mic ||
2275 wsource->id == snd_soc_dapm_line ||
2276 wsource->id == snd_soc_dapm_output)
2277 wsink->ext = 1;
2278 }
2279 if (wsource->id == snd_soc_dapm_output) {
2280 if (wsink->id == snd_soc_dapm_spk ||
2281 wsink->id == snd_soc_dapm_hp ||
2282 wsink->id == snd_soc_dapm_line ||
2283 wsink->id == snd_soc_dapm_input)
2284 wsource->ext = 1;
2285 }
2286
2287 /* connect static paths */
2288 if (control == NULL) {
2289 list_add(&path->list, &dapm->card->paths);
2290 list_add(&path->list_sink, &wsink->sources);
2291 list_add(&path->list_source, &wsource->sinks);
2292 path->connect = 1;
2293 return 0;
2294 }
2295
2296 /* connect dynamic paths */
2297 switch (wsink->id) {
2298 case snd_soc_dapm_adc:
2299 case snd_soc_dapm_dac:
2300 case snd_soc_dapm_pga:
2301 case snd_soc_dapm_out_drv:
2302 case snd_soc_dapm_input:
2303 case snd_soc_dapm_output:
2304 case snd_soc_dapm_siggen:
2305 case snd_soc_dapm_micbias:
2306 case snd_soc_dapm_vmid:
2307 case snd_soc_dapm_pre:
2308 case snd_soc_dapm_post:
2309 case snd_soc_dapm_supply:
2310 case snd_soc_dapm_regulator_supply:
2311 case snd_soc_dapm_clock_supply:
2312 case snd_soc_dapm_aif_in:
2313 case snd_soc_dapm_aif_out:
2314 case snd_soc_dapm_dai_in:
2315 case snd_soc_dapm_dai_out:
2316 case snd_soc_dapm_dai_link:
2317 list_add(&path->list, &dapm->card->paths);
2318 list_add(&path->list_sink, &wsink->sources);
2319 list_add(&path->list_source, &wsource->sinks);
2320 path->connect = 1;
2321 return 0;
2322 case snd_soc_dapm_mux:
2323 case snd_soc_dapm_virt_mux:
2324 case snd_soc_dapm_value_mux:
2325 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2326 &wsink->kcontrol_news[0]);
2327 if (ret != 0)
2328 goto err;
2329 break;
2330 case snd_soc_dapm_switch:
2331 case snd_soc_dapm_mixer:
2332 case snd_soc_dapm_mixer_named_ctl:
2333 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2334 if (ret != 0)
2335 goto err;
2336 break;
2337 case snd_soc_dapm_hp:
2338 case snd_soc_dapm_mic:
2339 case snd_soc_dapm_line:
2340 case snd_soc_dapm_spk:
2341 list_add(&path->list, &dapm->card->paths);
2342 list_add(&path->list_sink, &wsink->sources);
2343 list_add(&path->list_source, &wsource->sinks);
2344 path->connect = 0;
2345 return 0;
2346 }
2347
2348 dapm_mark_dirty(wsource, "Route added");
2349 dapm_mark_dirty(wsink, "Route added");
2350
2351 return 0;
2352
2353 err:
2354 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2355 source, control, sink);
2356 kfree(path);
2357 return ret;
2358 }
2359
2360 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2361 const struct snd_soc_dapm_route *route)
2362 {
2363 struct snd_soc_dapm_path *path, *p;
2364 const char *sink;
2365 const char *source;
2366 char prefixed_sink[80];
2367 char prefixed_source[80];
2368
2369 if (route->control) {
2370 dev_err(dapm->dev,
2371 "ASoC: Removal of routes with controls not supported\n");
2372 return -EINVAL;
2373 }
2374
2375 if (dapm->codec && dapm->codec->name_prefix) {
2376 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2377 dapm->codec->name_prefix, route->sink);
2378 sink = prefixed_sink;
2379 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2380 dapm->codec->name_prefix, route->source);
2381 source = prefixed_source;
2382 } else {
2383 sink = route->sink;
2384 source = route->source;
2385 }
2386
2387 path = NULL;
2388 list_for_each_entry(p, &dapm->card->paths, list) {
2389 if (strcmp(p->source->name, source) != 0)
2390 continue;
2391 if (strcmp(p->sink->name, sink) != 0)
2392 continue;
2393 path = p;
2394 break;
2395 }
2396
2397 if (path) {
2398 dapm_mark_dirty(path->source, "Route removed");
2399 dapm_mark_dirty(path->sink, "Route removed");
2400
2401 list_del(&path->list);
2402 list_del(&path->list_sink);
2403 list_del(&path->list_source);
2404 kfree(path);
2405 } else {
2406 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2407 source, sink);
2408 }
2409
2410 return 0;
2411 }
2412
2413 /**
2414 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2415 * @dapm: DAPM context
2416 * @route: audio routes
2417 * @num: number of routes
2418 *
2419 * Connects 2 dapm widgets together via a named audio path. The sink is
2420 * the widget receiving the audio signal, whilst the source is the sender
2421 * of the audio signal.
2422 *
2423 * Returns 0 for success else error. On error all resources can be freed
2424 * with a call to snd_soc_card_free().
2425 */
2426 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2427 const struct snd_soc_dapm_route *route, int num)
2428 {
2429 int i, r, ret = 0;
2430
2431 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2432 for (i = 0; i < num; i++) {
2433 r = snd_soc_dapm_add_route(dapm, route);
2434 if (r < 0) {
2435 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2436 route->source,
2437 route->control ? route->control : "direct",
2438 route->sink);
2439 ret = r;
2440 }
2441 route++;
2442 }
2443 mutex_unlock(&dapm->card->dapm_mutex);
2444
2445 return ret;
2446 }
2447 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2448
2449 /**
2450 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2451 * @dapm: DAPM context
2452 * @route: audio routes
2453 * @num: number of routes
2454 *
2455 * Removes routes from the DAPM context.
2456 */
2457 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2458 const struct snd_soc_dapm_route *route, int num)
2459 {
2460 int i, ret = 0;
2461
2462 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2463 for (i = 0; i < num; i++) {
2464 snd_soc_dapm_del_route(dapm, route);
2465 route++;
2466 }
2467 mutex_unlock(&dapm->card->dapm_mutex);
2468
2469 return ret;
2470 }
2471 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2472
2473 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2474 const struct snd_soc_dapm_route *route)
2475 {
2476 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2477 route->source,
2478 true);
2479 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2480 route->sink,
2481 true);
2482 struct snd_soc_dapm_path *path;
2483 int count = 0;
2484
2485 if (!source) {
2486 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2487 route->source);
2488 return -ENODEV;
2489 }
2490
2491 if (!sink) {
2492 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2493 route->sink);
2494 return -ENODEV;
2495 }
2496
2497 if (route->control || route->connected)
2498 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2499 route->source, route->sink);
2500
2501 list_for_each_entry(path, &source->sinks, list_source) {
2502 if (path->sink == sink) {
2503 path->weak = 1;
2504 count++;
2505 }
2506 }
2507
2508 if (count == 0)
2509 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2510 route->source, route->sink);
2511 if (count > 1)
2512 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2513 count, route->source, route->sink);
2514
2515 return 0;
2516 }
2517
2518 /**
2519 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2520 * @dapm: DAPM context
2521 * @route: audio routes
2522 * @num: number of routes
2523 *
2524 * Mark existing routes matching those specified in the passed array
2525 * as being weak, meaning that they are ignored for the purpose of
2526 * power decisions. The main intended use case is for sidetone paths
2527 * which couple audio between other independent paths if they are both
2528 * active in order to make the combination work better at the user
2529 * level but which aren't intended to be "used".
2530 *
2531 * Note that CODEC drivers should not use this as sidetone type paths
2532 * can frequently also be used as bypass paths.
2533 */
2534 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2535 const struct snd_soc_dapm_route *route, int num)
2536 {
2537 int i, err;
2538 int ret = 0;
2539
2540 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2541 for (i = 0; i < num; i++) {
2542 err = snd_soc_dapm_weak_route(dapm, route);
2543 if (err)
2544 ret = err;
2545 route++;
2546 }
2547 mutex_unlock(&dapm->card->dapm_mutex);
2548
2549 return ret;
2550 }
2551 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2552
2553 /**
2554 * snd_soc_dapm_new_widgets - add new dapm widgets
2555 * @dapm: DAPM context
2556 *
2557 * Checks the codec for any new dapm widgets and creates them if found.
2558 *
2559 * Returns 0 for success.
2560 */
2561 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2562 {
2563 struct snd_soc_dapm_widget *w;
2564 unsigned int val;
2565
2566 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2567
2568 list_for_each_entry(w, &dapm->card->widgets, list)
2569 {
2570 if (w->new)
2571 continue;
2572
2573 if (w->num_kcontrols) {
2574 w->kcontrols = kzalloc(w->num_kcontrols *
2575 sizeof(struct snd_kcontrol *),
2576 GFP_KERNEL);
2577 if (!w->kcontrols) {
2578 mutex_unlock(&dapm->card->dapm_mutex);
2579 return -ENOMEM;
2580 }
2581 }
2582
2583 switch(w->id) {
2584 case snd_soc_dapm_switch:
2585 case snd_soc_dapm_mixer:
2586 case snd_soc_dapm_mixer_named_ctl:
2587 dapm_new_mixer(w);
2588 break;
2589 case snd_soc_dapm_mux:
2590 case snd_soc_dapm_virt_mux:
2591 case snd_soc_dapm_value_mux:
2592 dapm_new_mux(w);
2593 break;
2594 case snd_soc_dapm_pga:
2595 case snd_soc_dapm_out_drv:
2596 dapm_new_pga(w);
2597 break;
2598 default:
2599 break;
2600 }
2601
2602 /* Read the initial power state from the device */
2603 if (w->reg >= 0) {
2604 val = soc_widget_read(w, w->reg);
2605 val &= 1 << w->shift;
2606 if (w->invert)
2607 val = !val;
2608
2609 if (val)
2610 w->power = 1;
2611 }
2612
2613 w->new = 1;
2614
2615 dapm_mark_dirty(w, "new widget");
2616 dapm_debugfs_add_widget(w);
2617 }
2618
2619 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2620 mutex_unlock(&dapm->card->dapm_mutex);
2621 return 0;
2622 }
2623 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2624
2625 /**
2626 * snd_soc_dapm_get_volsw - dapm mixer get callback
2627 * @kcontrol: mixer control
2628 * @ucontrol: control element information
2629 *
2630 * Callback to get the value of a dapm mixer control.
2631 *
2632 * Returns 0 for success.
2633 */
2634 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2635 struct snd_ctl_elem_value *ucontrol)
2636 {
2637 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2638 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2639 struct soc_mixer_control *mc =
2640 (struct soc_mixer_control *)kcontrol->private_value;
2641 unsigned int reg = mc->reg;
2642 unsigned int shift = mc->shift;
2643 int max = mc->max;
2644 unsigned int mask = (1 << fls(max)) - 1;
2645 unsigned int invert = mc->invert;
2646
2647 if (snd_soc_volsw_is_stereo(mc))
2648 dev_warn(widget->dapm->dev,
2649 "ASoC: Control '%s' is stereo, which is not supported\n",
2650 kcontrol->id.name);
2651
2652 ucontrol->value.integer.value[0] =
2653 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2654 if (invert)
2655 ucontrol->value.integer.value[0] =
2656 max - ucontrol->value.integer.value[0];
2657
2658 return 0;
2659 }
2660 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2661
2662 /**
2663 * snd_soc_dapm_put_volsw - dapm mixer set callback
2664 * @kcontrol: mixer control
2665 * @ucontrol: control element information
2666 *
2667 * Callback to set the value of a dapm mixer control.
2668 *
2669 * Returns 0 for success.
2670 */
2671 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2672 struct snd_ctl_elem_value *ucontrol)
2673 {
2674 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2675 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2676 struct snd_soc_codec *codec = widget->codec;
2677 struct snd_soc_card *card = codec->card;
2678 struct soc_mixer_control *mc =
2679 (struct soc_mixer_control *)kcontrol->private_value;
2680 unsigned int reg = mc->reg;
2681 unsigned int shift = mc->shift;
2682 int max = mc->max;
2683 unsigned int mask = (1 << fls(max)) - 1;
2684 unsigned int invert = mc->invert;
2685 unsigned int val;
2686 int connect, change;
2687 struct snd_soc_dapm_update update;
2688 int wi;
2689
2690 if (snd_soc_volsw_is_stereo(mc))
2691 dev_warn(widget->dapm->dev,
2692 "ASoC: Control '%s' is stereo, which is not supported\n",
2693 kcontrol->id.name);
2694
2695 val = (ucontrol->value.integer.value[0] & mask);
2696 connect = !!val;
2697
2698 if (invert)
2699 val = max - val;
2700 mask = mask << shift;
2701 val = val << shift;
2702
2703 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2704
2705 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2706 if (change) {
2707 for (wi = 0; wi < wlist->num_widgets; wi++) {
2708 widget = wlist->widgets[wi];
2709
2710 widget->value = val;
2711
2712 update.kcontrol = kcontrol;
2713 update.widget = widget;
2714 update.reg = reg;
2715 update.mask = mask;
2716 update.val = val;
2717 widget->dapm->update = &update;
2718
2719 soc_dapm_mixer_update_power(widget, kcontrol, connect);
2720
2721 widget->dapm->update = NULL;
2722 }
2723 }
2724
2725 mutex_unlock(&card->dapm_mutex);
2726 return 0;
2727 }
2728 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2729
2730 /**
2731 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2732 * @kcontrol: mixer control
2733 * @ucontrol: control element information
2734 *
2735 * Callback to get the value of a dapm enumerated double mixer control.
2736 *
2737 * Returns 0 for success.
2738 */
2739 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2740 struct snd_ctl_elem_value *ucontrol)
2741 {
2742 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2743 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2744 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2745 unsigned int val;
2746
2747 val = snd_soc_read(widget->codec, e->reg);
2748 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & e->mask;
2749 if (e->shift_l != e->shift_r)
2750 ucontrol->value.enumerated.item[1] =
2751 (val >> e->shift_r) & e->mask;
2752
2753 return 0;
2754 }
2755 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2756
2757 /**
2758 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2759 * @kcontrol: mixer control
2760 * @ucontrol: control element information
2761 *
2762 * Callback to set the value of a dapm enumerated double mixer control.
2763 *
2764 * Returns 0 for success.
2765 */
2766 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2767 struct snd_ctl_elem_value *ucontrol)
2768 {
2769 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2770 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2771 struct snd_soc_codec *codec = widget->codec;
2772 struct snd_soc_card *card = codec->card;
2773 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2774 unsigned int val, mux, change;
2775 unsigned int mask;
2776 struct snd_soc_dapm_update update;
2777 int wi;
2778
2779 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2780 return -EINVAL;
2781 mux = ucontrol->value.enumerated.item[0];
2782 val = mux << e->shift_l;
2783 mask = e->mask << e->shift_l;
2784 if (e->shift_l != e->shift_r) {
2785 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2786 return -EINVAL;
2787 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2788 mask |= e->mask << e->shift_r;
2789 }
2790
2791 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2792
2793 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2794 if (change) {
2795 for (wi = 0; wi < wlist->num_widgets; wi++) {
2796 widget = wlist->widgets[wi];
2797
2798 widget->value = val;
2799
2800 update.kcontrol = kcontrol;
2801 update.widget = widget;
2802 update.reg = e->reg;
2803 update.mask = mask;
2804 update.val = val;
2805 widget->dapm->update = &update;
2806
2807 soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2808
2809 widget->dapm->update = NULL;
2810 }
2811 }
2812
2813 mutex_unlock(&card->dapm_mutex);
2814 return change;
2815 }
2816 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2817
2818 /**
2819 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2820 * @kcontrol: mixer control
2821 * @ucontrol: control element information
2822 *
2823 * Returns 0 for success.
2824 */
2825 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2826 struct snd_ctl_elem_value *ucontrol)
2827 {
2828 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2829 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2830
2831 ucontrol->value.enumerated.item[0] = widget->value;
2832
2833 return 0;
2834 }
2835 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2836
2837 /**
2838 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2839 * @kcontrol: mixer control
2840 * @ucontrol: control element information
2841 *
2842 * Returns 0 for success.
2843 */
2844 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2845 struct snd_ctl_elem_value *ucontrol)
2846 {
2847 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2848 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2849 struct snd_soc_codec *codec = widget->codec;
2850 struct snd_soc_card *card = codec->card;
2851 struct soc_enum *e =
2852 (struct soc_enum *)kcontrol->private_value;
2853 int change;
2854 int ret = 0;
2855 int wi;
2856
2857 if (ucontrol->value.enumerated.item[0] >= e->max)
2858 return -EINVAL;
2859
2860 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2861
2862 change = widget->value != ucontrol->value.enumerated.item[0];
2863 if (change) {
2864 for (wi = 0; wi < wlist->num_widgets; wi++) {
2865 widget = wlist->widgets[wi];
2866
2867 widget->value = ucontrol->value.enumerated.item[0];
2868
2869 soc_dapm_mux_update_power(widget, kcontrol, widget->value, e);
2870 }
2871 }
2872
2873 mutex_unlock(&card->dapm_mutex);
2874 return ret;
2875 }
2876 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2877
2878 /**
2879 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2880 * callback
2881 * @kcontrol: mixer control
2882 * @ucontrol: control element information
2883 *
2884 * Callback to get the value of a dapm semi enumerated double mixer control.
2885 *
2886 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2887 * used for handling bitfield coded enumeration for example.
2888 *
2889 * Returns 0 for success.
2890 */
2891 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2892 struct snd_ctl_elem_value *ucontrol)
2893 {
2894 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2895 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2896 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2897 unsigned int reg_val, val, mux;
2898
2899 reg_val = snd_soc_read(widget->codec, e->reg);
2900 val = (reg_val >> e->shift_l) & e->mask;
2901 for (mux = 0; mux < e->max; mux++) {
2902 if (val == e->values[mux])
2903 break;
2904 }
2905 ucontrol->value.enumerated.item[0] = mux;
2906 if (e->shift_l != e->shift_r) {
2907 val = (reg_val >> e->shift_r) & e->mask;
2908 for (mux = 0; mux < e->max; mux++) {
2909 if (val == e->values[mux])
2910 break;
2911 }
2912 ucontrol->value.enumerated.item[1] = mux;
2913 }
2914
2915 return 0;
2916 }
2917 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2918
2919 /**
2920 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2921 * callback
2922 * @kcontrol: mixer control
2923 * @ucontrol: control element information
2924 *
2925 * Callback to set the value of a dapm semi enumerated double mixer control.
2926 *
2927 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2928 * used for handling bitfield coded enumeration for example.
2929 *
2930 * Returns 0 for success.
2931 */
2932 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2933 struct snd_ctl_elem_value *ucontrol)
2934 {
2935 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2936 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2937 struct snd_soc_codec *codec = widget->codec;
2938 struct snd_soc_card *card = codec->card;
2939 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2940 unsigned int val, mux, change;
2941 unsigned int mask;
2942 struct snd_soc_dapm_update update;
2943 int wi;
2944
2945 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2946 return -EINVAL;
2947 mux = ucontrol->value.enumerated.item[0];
2948 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2949 mask = e->mask << e->shift_l;
2950 if (e->shift_l != e->shift_r) {
2951 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2952 return -EINVAL;
2953 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2954 mask |= e->mask << e->shift_r;
2955 }
2956
2957 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2958
2959 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2960 if (change) {
2961 for (wi = 0; wi < wlist->num_widgets; wi++) {
2962 widget = wlist->widgets[wi];
2963
2964 widget->value = val;
2965
2966 update.kcontrol = kcontrol;
2967 update.widget = widget;
2968 update.reg = e->reg;
2969 update.mask = mask;
2970 update.val = val;
2971 widget->dapm->update = &update;
2972
2973 soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2974
2975 widget->dapm->update = NULL;
2976 }
2977 }
2978
2979 mutex_unlock(&card->dapm_mutex);
2980 return change;
2981 }
2982 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2983
2984 /**
2985 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2986 *
2987 * @kcontrol: mixer control
2988 * @uinfo: control element information
2989 *
2990 * Callback to provide information about a pin switch control.
2991 */
2992 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2993 struct snd_ctl_elem_info *uinfo)
2994 {
2995 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2996 uinfo->count = 1;
2997 uinfo->value.integer.min = 0;
2998 uinfo->value.integer.max = 1;
2999
3000 return 0;
3001 }
3002 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3003
3004 /**
3005 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3006 *
3007 * @kcontrol: mixer control
3008 * @ucontrol: Value
3009 */
3010 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3011 struct snd_ctl_elem_value *ucontrol)
3012 {
3013 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3014 const char *pin = (const char *)kcontrol->private_value;
3015
3016 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3017
3018 ucontrol->value.integer.value[0] =
3019 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3020
3021 mutex_unlock(&card->dapm_mutex);
3022
3023 return 0;
3024 }
3025 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3026
3027 /**
3028 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3029 *
3030 * @kcontrol: mixer control
3031 * @ucontrol: Value
3032 */
3033 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3034 struct snd_ctl_elem_value *ucontrol)
3035 {
3036 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3037 const char *pin = (const char *)kcontrol->private_value;
3038
3039 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3040
3041 if (ucontrol->value.integer.value[0])
3042 snd_soc_dapm_enable_pin(&card->dapm, pin);
3043 else
3044 snd_soc_dapm_disable_pin(&card->dapm, pin);
3045
3046 mutex_unlock(&card->dapm_mutex);
3047
3048 snd_soc_dapm_sync(&card->dapm);
3049 return 0;
3050 }
3051 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3052
3053 static struct snd_soc_dapm_widget *
3054 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3055 const struct snd_soc_dapm_widget *widget)
3056 {
3057 struct snd_soc_dapm_widget *w;
3058 size_t name_len;
3059 int ret;
3060
3061 if ((w = dapm_cnew_widget(widget)) == NULL)
3062 return NULL;
3063
3064 switch (w->id) {
3065 case snd_soc_dapm_regulator_supply:
3066 w->regulator = devm_regulator_get(dapm->dev, w->name);
3067 if (IS_ERR(w->regulator)) {
3068 ret = PTR_ERR(w->regulator);
3069 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3070 w->name, ret);
3071 return NULL;
3072 }
3073
3074 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) {
3075 ret = regulator_allow_bypass(w->regulator, true);
3076 if (ret != 0)
3077 dev_warn(w->dapm->dev,
3078 "ASoC: Failed to unbypass %s: %d\n",
3079 w->name, ret);
3080 }
3081 break;
3082 case snd_soc_dapm_clock_supply:
3083 #ifdef CONFIG_CLKDEV_LOOKUP
3084 w->clk = devm_clk_get(dapm->dev, w->name);
3085 if (IS_ERR(w->clk)) {
3086 ret = PTR_ERR(w->clk);
3087 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3088 w->name, ret);
3089 return NULL;
3090 }
3091 #else
3092 return NULL;
3093 #endif
3094 break;
3095 default:
3096 break;
3097 }
3098
3099 name_len = strlen(widget->name) + 1;
3100 if (dapm->codec && dapm->codec->name_prefix)
3101 name_len += 1 + strlen(dapm->codec->name_prefix);
3102 w->name = kmalloc(name_len, GFP_KERNEL);
3103 if (w->name == NULL) {
3104 kfree(w);
3105 return NULL;
3106 }
3107 if (dapm->codec && dapm->codec->name_prefix)
3108 snprintf((char *)w->name, name_len, "%s %s",
3109 dapm->codec->name_prefix, widget->name);
3110 else
3111 snprintf((char *)w->name, name_len, "%s", widget->name);
3112
3113 switch (w->id) {
3114 case snd_soc_dapm_switch:
3115 case snd_soc_dapm_mixer:
3116 case snd_soc_dapm_mixer_named_ctl:
3117 w->power_check = dapm_generic_check_power;
3118 break;
3119 case snd_soc_dapm_mux:
3120 case snd_soc_dapm_virt_mux:
3121 case snd_soc_dapm_value_mux:
3122 w->power_check = dapm_generic_check_power;
3123 break;
3124 case snd_soc_dapm_adc:
3125 case snd_soc_dapm_aif_out:
3126 case snd_soc_dapm_dai_out:
3127 w->power_check = dapm_adc_check_power;
3128 break;
3129 case snd_soc_dapm_dac:
3130 case snd_soc_dapm_aif_in:
3131 case snd_soc_dapm_dai_in:
3132 w->power_check = dapm_dac_check_power;
3133 break;
3134 case snd_soc_dapm_pga:
3135 case snd_soc_dapm_out_drv:
3136 case snd_soc_dapm_input:
3137 case snd_soc_dapm_output:
3138 case snd_soc_dapm_micbias:
3139 case snd_soc_dapm_spk:
3140 case snd_soc_dapm_hp:
3141 case snd_soc_dapm_mic:
3142 case snd_soc_dapm_line:
3143 case snd_soc_dapm_dai_link:
3144 w->power_check = dapm_generic_check_power;
3145 break;
3146 case snd_soc_dapm_supply:
3147 case snd_soc_dapm_regulator_supply:
3148 case snd_soc_dapm_clock_supply:
3149 w->power_check = dapm_supply_check_power;
3150 break;
3151 default:
3152 w->power_check = dapm_always_on_check_power;
3153 break;
3154 }
3155
3156 w->dapm = dapm;
3157 w->codec = dapm->codec;
3158 w->platform = dapm->platform;
3159 INIT_LIST_HEAD(&w->sources);
3160 INIT_LIST_HEAD(&w->sinks);
3161 INIT_LIST_HEAD(&w->list);
3162 INIT_LIST_HEAD(&w->dirty);
3163 list_add(&w->list, &dapm->card->widgets);
3164
3165 /* machine layer set ups unconnected pins and insertions */
3166 w->connected = 1;
3167 return w;
3168 }
3169
3170 /**
3171 * snd_soc_dapm_new_controls - create new dapm controls
3172 * @dapm: DAPM context
3173 * @widget: widget array
3174 * @num: number of widgets
3175 *
3176 * Creates new DAPM controls based upon the templates.
3177 *
3178 * Returns 0 for success else error.
3179 */
3180 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3181 const struct snd_soc_dapm_widget *widget,
3182 int num)
3183 {
3184 struct snd_soc_dapm_widget *w;
3185 int i;
3186 int ret = 0;
3187
3188 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3189 for (i = 0; i < num; i++) {
3190 w = snd_soc_dapm_new_control(dapm, widget);
3191 if (!w) {
3192 dev_err(dapm->dev,
3193 "ASoC: Failed to create DAPM control %s\n",
3194 widget->name);
3195 ret = -ENOMEM;
3196 break;
3197 }
3198 widget++;
3199 }
3200 mutex_unlock(&dapm->card->dapm_mutex);
3201 return ret;
3202 }
3203 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3204
3205 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3206 struct snd_kcontrol *kcontrol, int event)
3207 {
3208 struct snd_soc_dapm_path *source_p, *sink_p;
3209 struct snd_soc_dai *source, *sink;
3210 const struct snd_soc_pcm_stream *config = w->params;
3211 struct snd_pcm_substream substream;
3212 struct snd_pcm_hw_params *params = NULL;
3213 u64 fmt;
3214 int ret;
3215
3216 BUG_ON(!config);
3217 BUG_ON(list_empty(&w->sources) || list_empty(&w->sinks));
3218
3219 /* We only support a single source and sink, pick the first */
3220 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3221 list_sink);
3222 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3223 list_source);
3224
3225 BUG_ON(!source_p || !sink_p);
3226 BUG_ON(!sink_p->source || !source_p->sink);
3227 BUG_ON(!source_p->source || !sink_p->sink);
3228
3229 source = source_p->source->priv;
3230 sink = sink_p->sink->priv;
3231
3232 /* Be a little careful as we don't want to overflow the mask array */
3233 if (config->formats) {
3234 fmt = ffs(config->formats) - 1;
3235 } else {
3236 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3237 config->formats);
3238 fmt = 0;
3239 }
3240
3241 /* Currently very limited parameter selection */
3242 params = kzalloc(sizeof(*params), GFP_KERNEL);
3243 if (!params) {
3244 ret = -ENOMEM;
3245 goto out;
3246 }
3247 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3248
3249 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3250 config->rate_min;
3251 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3252 config->rate_max;
3253
3254 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3255 = config->channels_min;
3256 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3257 = config->channels_max;
3258
3259 memset(&substream, 0, sizeof(substream));
3260
3261 switch (event) {
3262 case SND_SOC_DAPM_PRE_PMU:
3263 if (source->driver->ops && source->driver->ops->hw_params) {
3264 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3265 ret = source->driver->ops->hw_params(&substream,
3266 params, source);
3267 if (ret != 0) {
3268 dev_err(source->dev,
3269 "ASoC: hw_params() failed: %d\n", ret);
3270 goto out;
3271 }
3272 }
3273
3274 if (sink->driver->ops && sink->driver->ops->hw_params) {
3275 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3276 ret = sink->driver->ops->hw_params(&substream, params,
3277 sink);
3278 if (ret != 0) {
3279 dev_err(sink->dev,
3280 "ASoC: hw_params() failed: %d\n", ret);
3281 goto out;
3282 }
3283 }
3284 break;
3285
3286 case SND_SOC_DAPM_POST_PMU:
3287 ret = snd_soc_dai_digital_mute(sink, 0,
3288 SNDRV_PCM_STREAM_PLAYBACK);
3289 if (ret != 0 && ret != -ENOTSUPP)
3290 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3291 ret = 0;
3292 break;
3293
3294 case SND_SOC_DAPM_PRE_PMD:
3295 ret = snd_soc_dai_digital_mute(sink, 1,
3296 SNDRV_PCM_STREAM_PLAYBACK);
3297 if (ret != 0 && ret != -ENOTSUPP)
3298 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3299 ret = 0;
3300 break;
3301
3302 default:
3303 BUG();
3304 return -EINVAL;
3305 }
3306
3307 out:
3308 kfree(params);
3309 return ret;
3310 }
3311
3312 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3313 const struct snd_soc_pcm_stream *params,
3314 struct snd_soc_dapm_widget *source,
3315 struct snd_soc_dapm_widget *sink)
3316 {
3317 struct snd_soc_dapm_route routes[2];
3318 struct snd_soc_dapm_widget template;
3319 struct snd_soc_dapm_widget *w;
3320 size_t len;
3321 char *link_name;
3322
3323 len = strlen(source->name) + strlen(sink->name) + 2;
3324 link_name = devm_kzalloc(card->dev, len, GFP_KERNEL);
3325 if (!link_name)
3326 return -ENOMEM;
3327 snprintf(link_name, len, "%s-%s", source->name, sink->name);
3328
3329 memset(&template, 0, sizeof(template));
3330 template.reg = SND_SOC_NOPM;
3331 template.id = snd_soc_dapm_dai_link;
3332 template.name = link_name;
3333 template.event = snd_soc_dai_link_event;
3334 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3335 SND_SOC_DAPM_PRE_PMD;
3336
3337 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3338
3339 w = snd_soc_dapm_new_control(&card->dapm, &template);
3340 if (!w) {
3341 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3342 link_name);
3343 return -ENOMEM;
3344 }
3345
3346 w->params = params;
3347
3348 memset(&routes, 0, sizeof(routes));
3349
3350 routes[0].source = source->name;
3351 routes[0].sink = link_name;
3352 routes[1].source = link_name;
3353 routes[1].sink = sink->name;
3354
3355 return snd_soc_dapm_add_routes(&card->dapm, routes,
3356 ARRAY_SIZE(routes));
3357 }
3358
3359 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3360 struct snd_soc_dai *dai)
3361 {
3362 struct snd_soc_dapm_widget template;
3363 struct snd_soc_dapm_widget *w;
3364
3365 WARN_ON(dapm->dev != dai->dev);
3366
3367 memset(&template, 0, sizeof(template));
3368 template.reg = SND_SOC_NOPM;
3369
3370 if (dai->driver->playback.stream_name) {
3371 template.id = snd_soc_dapm_dai_in;
3372 template.name = dai->driver->playback.stream_name;
3373 template.sname = dai->driver->playback.stream_name;
3374
3375 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3376 template.name);
3377
3378 w = snd_soc_dapm_new_control(dapm, &template);
3379 if (!w) {
3380 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3381 dai->driver->playback.stream_name);
3382 }
3383
3384 w->priv = dai;
3385 dai->playback_widget = w;
3386 }
3387
3388 if (dai->driver->capture.stream_name) {
3389 template.id = snd_soc_dapm_dai_out;
3390 template.name = dai->driver->capture.stream_name;
3391 template.sname = dai->driver->capture.stream_name;
3392
3393 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3394 template.name);
3395
3396 w = snd_soc_dapm_new_control(dapm, &template);
3397 if (!w) {
3398 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3399 dai->driver->capture.stream_name);
3400 }
3401
3402 w->priv = dai;
3403 dai->capture_widget = w;
3404 }
3405
3406 return 0;
3407 }
3408
3409 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3410 {
3411 struct snd_soc_dapm_widget *dai_w, *w;
3412 struct snd_soc_dai *dai;
3413 struct snd_soc_dapm_route r;
3414
3415 memset(&r, 0, sizeof(r));
3416
3417 /* For each DAI widget... */
3418 list_for_each_entry(dai_w, &card->widgets, list) {
3419 switch (dai_w->id) {
3420 case snd_soc_dapm_dai_in:
3421 case snd_soc_dapm_dai_out:
3422 break;
3423 default:
3424 continue;
3425 }
3426
3427 dai = dai_w->priv;
3428
3429 /* ...find all widgets with the same stream and link them */
3430 list_for_each_entry(w, &card->widgets, list) {
3431 if (w->dapm != dai_w->dapm)
3432 continue;
3433
3434 switch (w->id) {
3435 case snd_soc_dapm_dai_in:
3436 case snd_soc_dapm_dai_out:
3437 continue;
3438 default:
3439 break;
3440 }
3441
3442 if (!w->sname)
3443 continue;
3444
3445 if (dai->driver->playback.stream_name &&
3446 strstr(w->sname,
3447 dai->driver->playback.stream_name)) {
3448 r.source = dai->playback_widget->name;
3449 r.sink = w->name;
3450 dev_dbg(dai->dev, "%s -> %s\n",
3451 r.source, r.sink);
3452
3453 snd_soc_dapm_add_route(w->dapm, &r);
3454 }
3455
3456 if (dai->driver->capture.stream_name &&
3457 strstr(w->sname,
3458 dai->driver->capture.stream_name)) {
3459 r.source = w->name;
3460 r.sink = dai->capture_widget->name;
3461 dev_dbg(dai->dev, "%s -> %s\n",
3462 r.source, r.sink);
3463
3464 snd_soc_dapm_add_route(w->dapm, &r);
3465 }
3466 }
3467 }
3468
3469 return 0;
3470 }
3471
3472 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3473 int event)
3474 {
3475
3476 struct snd_soc_dapm_widget *w_cpu, *w_codec;
3477 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3478 struct snd_soc_dai *codec_dai = rtd->codec_dai;
3479
3480 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
3481 w_cpu = cpu_dai->playback_widget;
3482 w_codec = codec_dai->playback_widget;
3483 } else {
3484 w_cpu = cpu_dai->capture_widget;
3485 w_codec = codec_dai->capture_widget;
3486 }
3487
3488 if (w_cpu) {
3489
3490 dapm_mark_dirty(w_cpu, "stream event");
3491
3492 switch (event) {
3493 case SND_SOC_DAPM_STREAM_START:
3494 w_cpu->active = 1;
3495 break;
3496 case SND_SOC_DAPM_STREAM_STOP:
3497 w_cpu->active = 0;
3498 break;
3499 case SND_SOC_DAPM_STREAM_SUSPEND:
3500 case SND_SOC_DAPM_STREAM_RESUME:
3501 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3502 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3503 break;
3504 }
3505 }
3506
3507 if (w_codec) {
3508
3509 dapm_mark_dirty(w_codec, "stream event");
3510
3511 switch (event) {
3512 case SND_SOC_DAPM_STREAM_START:
3513 w_codec->active = 1;
3514 break;
3515 case SND_SOC_DAPM_STREAM_STOP:
3516 w_codec->active = 0;
3517 break;
3518 case SND_SOC_DAPM_STREAM_SUSPEND:
3519 case SND_SOC_DAPM_STREAM_RESUME:
3520 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3521 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3522 break;
3523 }
3524 }
3525
3526 dapm_power_widgets(&rtd->card->dapm, event);
3527 }
3528
3529 /**
3530 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3531 * @rtd: PCM runtime data
3532 * @stream: stream name
3533 * @event: stream event
3534 *
3535 * Sends a stream event to the dapm core. The core then makes any
3536 * necessary widget power changes.
3537 *
3538 * Returns 0 for success else error.
3539 */
3540 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3541 int event)
3542 {
3543 struct snd_soc_card *card = rtd->card;
3544
3545 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3546 soc_dapm_stream_event(rtd, stream, event);
3547 mutex_unlock(&card->dapm_mutex);
3548 }
3549
3550 /**
3551 * snd_soc_dapm_enable_pin - enable pin.
3552 * @dapm: DAPM context
3553 * @pin: pin name
3554 *
3555 * Enables input/output pin and its parents or children widgets iff there is
3556 * a valid audio route and active audio stream.
3557 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3558 * do any widget power switching.
3559 */
3560 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3561 {
3562 return snd_soc_dapm_set_pin(dapm, pin, 1);
3563 }
3564 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3565
3566 /**
3567 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3568 * @dapm: DAPM context
3569 * @pin: pin name
3570 *
3571 * Enables input/output pin regardless of any other state. This is
3572 * intended for use with microphone bias supplies used in microphone
3573 * jack detection.
3574 *
3575 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3576 * do any widget power switching.
3577 */
3578 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3579 const char *pin)
3580 {
3581 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3582
3583 if (!w) {
3584 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3585 return -EINVAL;
3586 }
3587
3588 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
3589 w->connected = 1;
3590 w->force = 1;
3591 dapm_mark_dirty(w, "force enable");
3592
3593 return 0;
3594 }
3595 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3596
3597 /**
3598 * snd_soc_dapm_disable_pin - disable pin.
3599 * @dapm: DAPM context
3600 * @pin: pin name
3601 *
3602 * Disables input/output pin and its parents or children widgets.
3603 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3604 * do any widget power switching.
3605 */
3606 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3607 const char *pin)
3608 {
3609 return snd_soc_dapm_set_pin(dapm, pin, 0);
3610 }
3611 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3612
3613 /**
3614 * snd_soc_dapm_nc_pin - permanently disable pin.
3615 * @dapm: DAPM context
3616 * @pin: pin name
3617 *
3618 * Marks the specified pin as being not connected, disabling it along
3619 * any parent or child widgets. At present this is identical to
3620 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3621 * additional things such as disabling controls which only affect
3622 * paths through the pin.
3623 *
3624 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3625 * do any widget power switching.
3626 */
3627 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3628 {
3629 return snd_soc_dapm_set_pin(dapm, pin, 0);
3630 }
3631 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3632
3633 /**
3634 * snd_soc_dapm_get_pin_status - get audio pin status
3635 * @dapm: DAPM context
3636 * @pin: audio signal pin endpoint (or start point)
3637 *
3638 * Get audio pin status - connected or disconnected.
3639 *
3640 * Returns 1 for connected otherwise 0.
3641 */
3642 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3643 const char *pin)
3644 {
3645 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3646
3647 if (w)
3648 return w->connected;
3649
3650 return 0;
3651 }
3652 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3653
3654 /**
3655 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3656 * @dapm: DAPM context
3657 * @pin: audio signal pin endpoint (or start point)
3658 *
3659 * Mark the given endpoint or pin as ignoring suspend. When the
3660 * system is disabled a path between two endpoints flagged as ignoring
3661 * suspend will not be disabled. The path must already be enabled via
3662 * normal means at suspend time, it will not be turned on if it was not
3663 * already enabled.
3664 */
3665 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3666 const char *pin)
3667 {
3668 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3669
3670 if (!w) {
3671 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3672 return -EINVAL;
3673 }
3674
3675 w->ignore_suspend = 1;
3676
3677 return 0;
3678 }
3679 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3680
3681 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3682 struct snd_soc_dapm_widget *w)
3683 {
3684 struct snd_soc_dapm_path *p;
3685
3686 list_for_each_entry(p, &card->paths, list) {
3687 if ((p->source == w) || (p->sink == w)) {
3688 dev_dbg(card->dev,
3689 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3690 p->source->name, p->source->id, p->source->dapm,
3691 p->sink->name, p->sink->id, p->sink->dapm);
3692
3693 /* Connected to something other than the codec */
3694 if (p->source->dapm != p->sink->dapm)
3695 return true;
3696 /*
3697 * Loopback connection from codec external pin to
3698 * codec external pin
3699 */
3700 if (p->sink->id == snd_soc_dapm_input) {
3701 switch (p->source->id) {
3702 case snd_soc_dapm_output:
3703 case snd_soc_dapm_micbias:
3704 return true;
3705 default:
3706 break;
3707 }
3708 }
3709 }
3710 }
3711
3712 return false;
3713 }
3714
3715 /**
3716 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3717 * @codec: The codec whose pins should be processed
3718 *
3719 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3720 * which are unused. Pins are used if they are connected externally to the
3721 * codec, whether that be to some other device, or a loop-back connection to
3722 * the codec itself.
3723 */
3724 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3725 {
3726 struct snd_soc_card *card = codec->card;
3727 struct snd_soc_dapm_context *dapm = &codec->dapm;
3728 struct snd_soc_dapm_widget *w;
3729
3730 dev_dbg(codec->dev, "ASoC: Auto NC: DAPMs: card:%p codec:%p\n",
3731 &card->dapm, &codec->dapm);
3732
3733 list_for_each_entry(w, &card->widgets, list) {
3734 if (w->dapm != dapm)
3735 continue;
3736 switch (w->id) {
3737 case snd_soc_dapm_input:
3738 case snd_soc_dapm_output:
3739 case snd_soc_dapm_micbias:
3740 dev_dbg(codec->dev, "ASoC: Auto NC: Checking widget %s\n",
3741 w->name);
3742 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3743 dev_dbg(codec->dev,
3744 "... Not in map; disabling\n");
3745 snd_soc_dapm_nc_pin(dapm, w->name);
3746 }
3747 break;
3748 default:
3749 break;
3750 }
3751 }
3752 }
3753
3754 /**
3755 * snd_soc_dapm_free - free dapm resources
3756 * @dapm: DAPM context
3757 *
3758 * Free all dapm widgets and resources.
3759 */
3760 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3761 {
3762 snd_soc_dapm_sys_remove(dapm->dev);
3763 dapm_debugfs_cleanup(dapm);
3764 dapm_free_widgets(dapm);
3765 list_del(&dapm->list);
3766 }
3767 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3768
3769 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3770 {
3771 struct snd_soc_card *card = dapm->card;
3772 struct snd_soc_dapm_widget *w;
3773 LIST_HEAD(down_list);
3774 int powerdown = 0;
3775
3776 mutex_lock(&card->dapm_mutex);
3777
3778 list_for_each_entry(w, &dapm->card->widgets, list) {
3779 if (w->dapm != dapm)
3780 continue;
3781 if (w->power) {
3782 dapm_seq_insert(w, &down_list, false);
3783 w->power = 0;
3784 powerdown = 1;
3785 }
3786 }
3787
3788 /* If there were no widgets to power down we're already in
3789 * standby.
3790 */
3791 if (powerdown) {
3792 if (dapm->bias_level == SND_SOC_BIAS_ON)
3793 snd_soc_dapm_set_bias_level(dapm,
3794 SND_SOC_BIAS_PREPARE);
3795 dapm_seq_run(dapm, &down_list, 0, false);
3796 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3797 snd_soc_dapm_set_bias_level(dapm,
3798 SND_SOC_BIAS_STANDBY);
3799 }
3800
3801 mutex_unlock(&card->dapm_mutex);
3802 }
3803
3804 /*
3805 * snd_soc_dapm_shutdown - callback for system shutdown
3806 */
3807 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3808 {
3809 struct snd_soc_codec *codec;
3810
3811 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
3812 soc_dapm_shutdown_codec(&codec->dapm);
3813 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3814 snd_soc_dapm_set_bias_level(&codec->dapm,
3815 SND_SOC_BIAS_OFF);
3816 }
3817 }
3818
3819 /* Module information */
3820 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3821 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3822 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)