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ASoC: dapm: Implement mixer input auto-disable
[linux-2.6/btrfs-unstable.git] / sound / soc / soc-dapm.c
blob0944bc4bd4a49faf634b76406330f405b7dff573
1 /*
2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * Features:
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
15 * DACs/ADCs.
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/headphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
20 * sinks, dacs, etc
21 * o Delayed power down of audio subsystem to reduce pops between a quick
22 * device reopen.
23 *
24 */
25
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/init.h>
29 #include <linux/async.h>
30 #include <linux/delay.h>
31 #include <linux/pm.h>
32 #include <linux/bitops.h>
33 #include <linux/platform_device.h>
34 #include <linux/jiffies.h>
35 #include <linux/debugfs.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/regulator/consumer.h>
38 #include <linux/clk.h>
39 #include <linux/slab.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc.h>
44 #include <sound/initval.h>
45
46 #include <trace/events/asoc.h>
47
48 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
49
50 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
51 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
52 const char *control,
53 int (*connected)(struct snd_soc_dapm_widget *source,
54 struct snd_soc_dapm_widget *sink));
55 static struct snd_soc_dapm_widget *
56 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
57 const struct snd_soc_dapm_widget *widget);
58
59 /* dapm power sequences - make this per codec in the future */
60 static int dapm_up_seq[] = {
61 [snd_soc_dapm_pre] = 0,
62 [snd_soc_dapm_supply] = 1,
63 [snd_soc_dapm_regulator_supply] = 1,
64 [snd_soc_dapm_clock_supply] = 1,
65 [snd_soc_dapm_micbias] = 2,
66 [snd_soc_dapm_dai_link] = 2,
67 [snd_soc_dapm_dai_in] = 3,
68 [snd_soc_dapm_dai_out] = 3,
69 [snd_soc_dapm_aif_in] = 3,
70 [snd_soc_dapm_aif_out] = 3,
71 [snd_soc_dapm_mic] = 4,
72 [snd_soc_dapm_mux] = 5,
73 [snd_soc_dapm_virt_mux] = 5,
74 [snd_soc_dapm_value_mux] = 5,
75 [snd_soc_dapm_dac] = 6,
76 [snd_soc_dapm_switch] = 7,
77 [snd_soc_dapm_mixer] = 7,
78 [snd_soc_dapm_mixer_named_ctl] = 7,
79 [snd_soc_dapm_pga] = 8,
80 [snd_soc_dapm_adc] = 9,
81 [snd_soc_dapm_out_drv] = 10,
82 [snd_soc_dapm_hp] = 10,
83 [snd_soc_dapm_spk] = 10,
84 [snd_soc_dapm_line] = 10,
85 [snd_soc_dapm_kcontrol] = 11,
86 [snd_soc_dapm_post] = 12,
87 };
88
89 static int dapm_down_seq[] = {
90 [snd_soc_dapm_pre] = 0,
91 [snd_soc_dapm_kcontrol] = 1,
92 [snd_soc_dapm_adc] = 2,
93 [snd_soc_dapm_hp] = 3,
94 [snd_soc_dapm_spk] = 3,
95 [snd_soc_dapm_line] = 3,
96 [snd_soc_dapm_out_drv] = 3,
97 [snd_soc_dapm_pga] = 4,
98 [snd_soc_dapm_switch] = 5,
99 [snd_soc_dapm_mixer_named_ctl] = 5,
100 [snd_soc_dapm_mixer] = 5,
101 [snd_soc_dapm_dac] = 6,
102 [snd_soc_dapm_mic] = 7,
103 [snd_soc_dapm_micbias] = 8,
104 [snd_soc_dapm_mux] = 9,
105 [snd_soc_dapm_virt_mux] = 9,
106 [snd_soc_dapm_value_mux] = 9,
107 [snd_soc_dapm_aif_in] = 10,
108 [snd_soc_dapm_aif_out] = 10,
109 [snd_soc_dapm_dai_in] = 10,
110 [snd_soc_dapm_dai_out] = 10,
111 [snd_soc_dapm_dai_link] = 11,
112 [snd_soc_dapm_clock_supply] = 12,
113 [snd_soc_dapm_regulator_supply] = 12,
114 [snd_soc_dapm_supply] = 12,
115 [snd_soc_dapm_post] = 13,
116 };
117
118 static void pop_wait(u32 pop_time)
119 {
120 if (pop_time)
121 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
122 }
123
124 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
125 {
126 va_list args;
127 char *buf;
128
129 if (!pop_time)
130 return;
131
132 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
133 if (buf == NULL)
134 return;
135
136 va_start(args, fmt);
137 vsnprintf(buf, PAGE_SIZE, fmt, args);
138 dev_info(dev, "%s", buf);
139 va_end(args);
140
141 kfree(buf);
142 }
143
144 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
145 {
146 return !list_empty(&w->dirty);
147 }
148
149 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
150 {
151 if (!dapm_dirty_widget(w)) {
152 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
153 w->name, reason);
154 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
155 }
156 }
157 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
158
159 void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm)
160 {
161 struct snd_soc_card *card = dapm->card;
162 struct snd_soc_dapm_widget *w;
163
164 mutex_lock(&card->dapm_mutex);
165
166 list_for_each_entry(w, &card->widgets, list) {
167 switch (w->id) {
168 case snd_soc_dapm_input:
169 case snd_soc_dapm_output:
170 dapm_mark_dirty(w, "Rechecking inputs and outputs");
171 break;
172 default:
173 break;
174 }
175 }
176
177 mutex_unlock(&card->dapm_mutex);
178 }
179 EXPORT_SYMBOL_GPL(dapm_mark_io_dirty);
180
181 /* create a new dapm widget */
182 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
183 const struct snd_soc_dapm_widget *_widget)
184 {
185 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
186 }
187
188 struct dapm_kcontrol_data {
189 unsigned int value;
190 struct snd_soc_dapm_widget *widget;
191 struct list_head paths;
192 struct snd_soc_dapm_widget_list *wlist;
193 };
194
195 static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
196 struct snd_kcontrol *kcontrol)
197 {
198 struct dapm_kcontrol_data *data;
199 struct soc_mixer_control *mc;
200
201 data = kzalloc(sizeof(*data), GFP_KERNEL);
202 if (!data) {
203 dev_err(widget->dapm->dev,
204 "ASoC: can't allocate kcontrol data for %s\n",
205 widget->name);
206 return -ENOMEM;
207 }
208
209 INIT_LIST_HEAD(&data->paths);
210
211 switch (widget->id) {
212 case snd_soc_dapm_switch:
213 case snd_soc_dapm_mixer:
214 case snd_soc_dapm_mixer_named_ctl:
215 mc = (struct soc_mixer_control *)kcontrol->private_value;
216
217 if (mc->autodisable) {
218 struct snd_soc_dapm_widget template;
219
220 memset(&template, 0, sizeof(template));
221 template.reg = mc->reg;
222 template.mask = (1 << fls(mc->max)) - 1;
223 template.shift = mc->shift;
224 if (mc->invert)
225 template.off_val = mc->max;
226 else
227 template.off_val = 0;
228 template.on_val = template.off_val;
229 template.id = snd_soc_dapm_kcontrol;
230 template.name = kcontrol->id.name;
231
232 data->widget = snd_soc_dapm_new_control(widget->dapm,
233 &template);
234 if (!data->widget) {
235 kfree(data);
236 return -ENOMEM;
237 }
238 }
239 break;
240 default:
241 break;
242 }
243
244 kcontrol->private_data = data;
245
246 return 0;
247 }
248
249 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
250 {
251 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
252 kfree(data->widget);
253 kfree(data->wlist);
254 kfree(data);
255 }
256
257 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
258 const struct snd_kcontrol *kcontrol)
259 {
260 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
261
262 return data->wlist;
263 }
264
265 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
266 struct snd_soc_dapm_widget *widget)
267 {
268 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
269 struct snd_soc_dapm_widget_list *new_wlist;
270 unsigned int n;
271
272 if (data->wlist)
273 n = data->wlist->num_widgets + 1;
274 else
275 n = 1;
276
277 new_wlist = krealloc(data->wlist,
278 sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
279 if (!new_wlist)
280 return -ENOMEM;
281
282 new_wlist->widgets[n - 1] = widget;
283 new_wlist->num_widgets = n;
284
285 data->wlist = new_wlist;
286
287 return 0;
288 }
289
290 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
291 struct snd_soc_dapm_path *path)
292 {
293 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
294
295 list_add_tail(&path->list_kcontrol, &data->paths);
296
297 if (data->widget) {
298 snd_soc_dapm_add_path(data->widget->dapm, data->widget,
299 path->source, NULL, NULL);
300 }
301 }
302
303 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
304 {
305 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
306
307 if (!data->widget)
308 return true;
309
310 return data->widget->power;
311 }
312
313 static struct list_head *dapm_kcontrol_get_path_list(
314 const struct snd_kcontrol *kcontrol)
315 {
316 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
317
318 return &data->paths;
319 }
320
321 #define dapm_kcontrol_for_each_path(path, kcontrol) \
322 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
323 list_kcontrol)
324
325 static unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
326 {
327 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
328
329 return data->value;
330 }
331
332 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
333 unsigned int value)
334 {
335 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
336
337 if (data->value == value)
338 return false;
339
340 if (data->widget)
341 data->widget->on_val = value;
342
343 data->value = value;
344
345 return true;
346 }
347
348 /**
349 * snd_soc_dapm_kcontrol_codec() - Returns the codec associated to a kcontrol
350 * @kcontrol: The kcontrol
351 */
352 struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(struct snd_kcontrol *kcontrol)
353 {
354 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->codec;
355 }
356 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_codec);
357
358 static void dapm_reset(struct snd_soc_card *card)
359 {
360 struct snd_soc_dapm_widget *w;
361
362 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
363
364 list_for_each_entry(w, &card->widgets, list) {
365 w->new_power = w->power;
366 w->power_checked = false;
367 w->inputs = -1;
368 w->outputs = -1;
369 }
370 }
371
372 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
373 {
374 if (w->codec)
375 return snd_soc_read(w->codec, reg);
376 else if (w->platform)
377 return snd_soc_platform_read(w->platform, reg);
378
379 dev_err(w->dapm->dev, "ASoC: no valid widget read method\n");
380 return -1;
381 }
382
383 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
384 {
385 if (w->codec)
386 return snd_soc_write(w->codec, reg, val);
387 else if (w->platform)
388 return snd_soc_platform_write(w->platform, reg, val);
389
390 dev_err(w->dapm->dev, "ASoC: no valid widget write method\n");
391 return -1;
392 }
393
394 static inline void soc_widget_lock(struct snd_soc_dapm_widget *w)
395 {
396 if (w->codec && !w->codec->using_regmap)
397 mutex_lock(&w->codec->mutex);
398 else if (w->platform)
399 mutex_lock(&w->platform->mutex);
400 }
401
402 static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w)
403 {
404 if (w->codec && !w->codec->using_regmap)
405 mutex_unlock(&w->codec->mutex);
406 else if (w->platform)
407 mutex_unlock(&w->platform->mutex);
408 }
409
410 static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
411 unsigned short reg, unsigned int mask, unsigned int value)
412 {
413 bool change;
414 unsigned int old, new;
415 int ret;
416
417 if (w->codec && w->codec->using_regmap) {
418 ret = regmap_update_bits_check(w->codec->control_data,
419 reg, mask, value, &change);
420 if (ret != 0)
421 return ret;
422 } else {
423 soc_widget_lock(w);
424 ret = soc_widget_read(w, reg);
425 if (ret < 0) {
426 soc_widget_unlock(w);
427 return ret;
428 }
429
430 old = ret;
431 new = (old & ~mask) | (value & mask);
432 change = old != new;
433 if (change) {
434 ret = soc_widget_write(w, reg, new);
435 if (ret < 0) {
436 soc_widget_unlock(w);
437 return ret;
438 }
439 }
440 soc_widget_unlock(w);
441 }
442
443 return change;
444 }
445
446 /**
447 * snd_soc_dapm_set_bias_level - set the bias level for the system
448 * @dapm: DAPM context
449 * @level: level to configure
450 *
451 * Configure the bias (power) levels for the SoC audio device.
452 *
453 * Returns 0 for success else error.
454 */
455 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
456 enum snd_soc_bias_level level)
457 {
458 struct snd_soc_card *card = dapm->card;
459 int ret = 0;
460
461 trace_snd_soc_bias_level_start(card, level);
462
463 if (card && card->set_bias_level)
464 ret = card->set_bias_level(card, dapm, level);
465 if (ret != 0)
466 goto out;
467
468 if (dapm->codec) {
469 if (dapm->codec->driver->set_bias_level)
470 ret = dapm->codec->driver->set_bias_level(dapm->codec,
471 level);
472 else
473 dapm->bias_level = level;
474 } else if (!card || dapm != &card->dapm) {
475 dapm->bias_level = level;
476 }
477
478 if (ret != 0)
479 goto out;
480
481 if (card && card->set_bias_level_post)
482 ret = card->set_bias_level_post(card, dapm, level);
483 out:
484 trace_snd_soc_bias_level_done(card, level);
485
486 return ret;
487 }
488
489 /* set up initial codec paths */
490 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
491 struct snd_soc_dapm_path *p, int i)
492 {
493 switch (w->id) {
494 case snd_soc_dapm_switch:
495 case snd_soc_dapm_mixer:
496 case snd_soc_dapm_mixer_named_ctl: {
497 int val;
498 struct soc_mixer_control *mc = (struct soc_mixer_control *)
499 w->kcontrol_news[i].private_value;
500 unsigned int reg = mc->reg;
501 unsigned int shift = mc->shift;
502 int max = mc->max;
503 unsigned int mask = (1 << fls(max)) - 1;
504 unsigned int invert = mc->invert;
505
506 val = soc_widget_read(w, reg);
507 val = (val >> shift) & mask;
508 if (invert)
509 val = max - val;
510
511 p->connect = !!val;
512 }
513 break;
514 case snd_soc_dapm_mux: {
515 struct soc_enum *e = (struct soc_enum *)
516 w->kcontrol_news[i].private_value;
517 int val, item;
518
519 val = soc_widget_read(w, e->reg);
520 item = (val >> e->shift_l) & e->mask;
521
522 if (item < e->max && !strcmp(p->name, e->texts[item]))
523 p->connect = 1;
524 else
525 p->connect = 0;
526 }
527 break;
528 case snd_soc_dapm_virt_mux: {
529 struct soc_enum *e = (struct soc_enum *)
530 w->kcontrol_news[i].private_value;
531
532 p->connect = 0;
533 /* since a virtual mux has no backing registers to
534 * decide which path to connect, it will try to match
535 * with the first enumeration. This is to ensure
536 * that the default mux choice (the first) will be
537 * correctly powered up during initialization.
538 */
539 if (!strcmp(p->name, e->texts[0]))
540 p->connect = 1;
541 }
542 break;
543 case snd_soc_dapm_value_mux: {
544 struct soc_enum *e = (struct soc_enum *)
545 w->kcontrol_news[i].private_value;
546 int val, item;
547
548 val = soc_widget_read(w, e->reg);
549 val = (val >> e->shift_l) & e->mask;
550 for (item = 0; item < e->max; item++) {
551 if (val == e->values[item])
552 break;
553 }
554
555 if (item < e->max && !strcmp(p->name, e->texts[item]))
556 p->connect = 1;
557 else
558 p->connect = 0;
559 }
560 break;
561 /* does not affect routing - always connected */
562 case snd_soc_dapm_pga:
563 case snd_soc_dapm_out_drv:
564 case snd_soc_dapm_output:
565 case snd_soc_dapm_adc:
566 case snd_soc_dapm_input:
567 case snd_soc_dapm_siggen:
568 case snd_soc_dapm_dac:
569 case snd_soc_dapm_micbias:
570 case snd_soc_dapm_vmid:
571 case snd_soc_dapm_supply:
572 case snd_soc_dapm_regulator_supply:
573 case snd_soc_dapm_clock_supply:
574 case snd_soc_dapm_aif_in:
575 case snd_soc_dapm_aif_out:
576 case snd_soc_dapm_dai_in:
577 case snd_soc_dapm_dai_out:
578 case snd_soc_dapm_hp:
579 case snd_soc_dapm_mic:
580 case snd_soc_dapm_spk:
581 case snd_soc_dapm_line:
582 case snd_soc_dapm_dai_link:
583 case snd_soc_dapm_kcontrol:
584 p->connect = 1;
585 break;
586 /* does affect routing - dynamically connected */
587 case snd_soc_dapm_pre:
588 case snd_soc_dapm_post:
589 p->connect = 0;
590 break;
591 }
592 }
593
594 /* connect mux widget to its interconnecting audio paths */
595 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
596 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
597 struct snd_soc_dapm_path *path, const char *control_name,
598 const struct snd_kcontrol_new *kcontrol)
599 {
600 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
601 int i;
602
603 for (i = 0; i < e->max; i++) {
604 if (!(strcmp(control_name, e->texts[i]))) {
605 list_add(&path->list, &dapm->card->paths);
606 list_add(&path->list_sink, &dest->sources);
607 list_add(&path->list_source, &src->sinks);
608 path->name = (char*)e->texts[i];
609 dapm_set_path_status(dest, path, 0);
610 return 0;
611 }
612 }
613
614 return -ENODEV;
615 }
616
617 /* connect mixer widget to its interconnecting audio paths */
618 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
619 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
620 struct snd_soc_dapm_path *path, const char *control_name)
621 {
622 int i;
623
624 /* search for mixer kcontrol */
625 for (i = 0; i < dest->num_kcontrols; i++) {
626 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
627 list_add(&path->list, &dapm->card->paths);
628 list_add(&path->list_sink, &dest->sources);
629 list_add(&path->list_source, &src->sinks);
630 path->name = dest->kcontrol_news[i].name;
631 dapm_set_path_status(dest, path, i);
632 return 0;
633 }
634 }
635 return -ENODEV;
636 }
637
638 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
639 struct snd_soc_dapm_widget *kcontrolw,
640 const struct snd_kcontrol_new *kcontrol_new,
641 struct snd_kcontrol **kcontrol)
642 {
643 struct snd_soc_dapm_widget *w;
644 int i;
645
646 *kcontrol = NULL;
647
648 list_for_each_entry(w, &dapm->card->widgets, list) {
649 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
650 continue;
651 for (i = 0; i < w->num_kcontrols; i++) {
652 if (&w->kcontrol_news[i] == kcontrol_new) {
653 if (w->kcontrols)
654 *kcontrol = w->kcontrols[i];
655 return 1;
656 }
657 }
658 }
659
660 return 0;
661 }
662
663 /*
664 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
665 * create it. Either way, add the widget into the control's widget list
666 */
667 static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w,
668 int kci, struct snd_soc_dapm_path *path)
669 {
670 struct snd_soc_dapm_context *dapm = w->dapm;
671 struct snd_card *card = dapm->card->snd_card;
672 const char *prefix;
673 size_t prefix_len;
674 int shared;
675 struct snd_kcontrol *kcontrol;
676 bool wname_in_long_name, kcname_in_long_name;
677 char *long_name;
678 const char *name;
679 int ret;
680
681 if (dapm->codec)
682 prefix = dapm->codec->name_prefix;
683 else
684 prefix = NULL;
685
686 if (prefix)
687 prefix_len = strlen(prefix) + 1;
688 else
689 prefix_len = 0;
690
691 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
692 &kcontrol);
693
694 if (!kcontrol) {
695 if (shared) {
696 wname_in_long_name = false;
697 kcname_in_long_name = true;
698 } else {
699 switch (w->id) {
700 case snd_soc_dapm_switch:
701 case snd_soc_dapm_mixer:
702 wname_in_long_name = true;
703 kcname_in_long_name = true;
704 break;
705 case snd_soc_dapm_mixer_named_ctl:
706 wname_in_long_name = false;
707 kcname_in_long_name = true;
708 break;
709 case snd_soc_dapm_mux:
710 case snd_soc_dapm_virt_mux:
711 case snd_soc_dapm_value_mux:
712 wname_in_long_name = true;
713 kcname_in_long_name = false;
714 break;
715 default:
716 return -EINVAL;
717 }
718 }
719
720 if (wname_in_long_name && kcname_in_long_name) {
721 /*
722 * The control will get a prefix from the control
723 * creation process but we're also using the same
724 * prefix for widgets so cut the prefix off the
725 * front of the widget name.
726 */
727 long_name = kasprintf(GFP_KERNEL, "%s %s",
728 w->name + prefix_len,
729 w->kcontrol_news[kci].name);
730 if (long_name == NULL)
731 return -ENOMEM;
732
733 name = long_name;
734 } else if (wname_in_long_name) {
735 long_name = NULL;
736 name = w->name + prefix_len;
737 } else {
738 long_name = NULL;
739 name = w->kcontrol_news[kci].name;
740 }
741
742 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
743 prefix);
744 kfree(long_name);
745 if (!kcontrol)
746 return -ENOMEM;
747 kcontrol->private_free = dapm_kcontrol_free;
748
749 ret = dapm_kcontrol_data_alloc(w, kcontrol);
750 if (ret) {
751 snd_ctl_free_one(kcontrol);
752 return ret;
753 }
754
755 ret = snd_ctl_add(card, kcontrol);
756 if (ret < 0) {
757 dev_err(dapm->dev,
758 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
759 w->name, name, ret);
760 return ret;
761 }
762 }
763
764 ret = dapm_kcontrol_add_widget(kcontrol, w);
765 if (ret)
766 return ret;
767
768 w->kcontrols[kci] = kcontrol;
769 dapm_kcontrol_add_path(kcontrol, path);
770
771 return 0;
772 }
773
774 /* create new dapm mixer control */
775 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
776 {
777 int i, ret;
778 struct snd_soc_dapm_path *path;
779
780 /* add kcontrol */
781 for (i = 0; i < w->num_kcontrols; i++) {
782 /* match name */
783 list_for_each_entry(path, &w->sources, list_sink) {
784 /* mixer/mux paths name must match control name */
785 if (path->name != (char *)w->kcontrol_news[i].name)
786 continue;
787
788 if (w->kcontrols[i]) {
789 dapm_kcontrol_add_path(w->kcontrols[i], path);
790 continue;
791 }
792
793 ret = dapm_create_or_share_mixmux_kcontrol(w, i, path);
794 if (ret < 0)
795 return ret;
796 }
797 }
798
799 return 0;
800 }
801
802 /* create new dapm mux control */
803 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
804 {
805 struct snd_soc_dapm_context *dapm = w->dapm;
806 struct snd_soc_dapm_path *path;
807 int ret;
808
809 if (w->num_kcontrols != 1) {
810 dev_err(dapm->dev,
811 "ASoC: mux %s has incorrect number of controls\n",
812 w->name);
813 return -EINVAL;
814 }
815
816 path = list_first_entry(&w->sources, struct snd_soc_dapm_path,
817 list_sink);
818 if (!path) {
819 dev_err(dapm->dev, "ASoC: mux %s has no paths\n", w->name);
820 return -EINVAL;
821 }
822
823 ret = dapm_create_or_share_mixmux_kcontrol(w, 0, path);
824 if (ret < 0)
825 return ret;
826
827 list_for_each_entry(path, &w->sources, list_sink)
828 dapm_kcontrol_add_path(w->kcontrols[0], path);
829
830 return 0;
831 }
832
833 /* create new dapm volume control */
834 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
835 {
836 if (w->num_kcontrols)
837 dev_err(w->dapm->dev,
838 "ASoC: PGA controls not supported: '%s'\n", w->name);
839
840 return 0;
841 }
842
843 /* reset 'walked' bit for each dapm path */
844 static void dapm_clear_walk_output(struct snd_soc_dapm_context *dapm,
845 struct list_head *sink)
846 {
847 struct snd_soc_dapm_path *p;
848
849 list_for_each_entry(p, sink, list_source) {
850 if (p->walked) {
851 p->walked = 0;
852 dapm_clear_walk_output(dapm, &p->sink->sinks);
853 }
854 }
855 }
856
857 static void dapm_clear_walk_input(struct snd_soc_dapm_context *dapm,
858 struct list_head *source)
859 {
860 struct snd_soc_dapm_path *p;
861
862 list_for_each_entry(p, source, list_sink) {
863 if (p->walked) {
864 p->walked = 0;
865 dapm_clear_walk_input(dapm, &p->source->sources);
866 }
867 }
868 }
869
870
871 /* We implement power down on suspend by checking the power state of
872 * the ALSA card - when we are suspending the ALSA state for the card
873 * is set to D3.
874 */
875 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
876 {
877 int level = snd_power_get_state(widget->dapm->card->snd_card);
878
879 switch (level) {
880 case SNDRV_CTL_POWER_D3hot:
881 case SNDRV_CTL_POWER_D3cold:
882 if (widget->ignore_suspend)
883 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
884 widget->name);
885 return widget->ignore_suspend;
886 default:
887 return 1;
888 }
889 }
890
891 /* add widget to list if it's not already in the list */
892 static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list,
893 struct snd_soc_dapm_widget *w)
894 {
895 struct snd_soc_dapm_widget_list *wlist;
896 int wlistsize, wlistentries, i;
897
898 if (*list == NULL)
899 return -EINVAL;
900
901 wlist = *list;
902
903 /* is this widget already in the list */
904 for (i = 0; i < wlist->num_widgets; i++) {
905 if (wlist->widgets[i] == w)
906 return 0;
907 }
908
909 /* allocate some new space */
910 wlistentries = wlist->num_widgets + 1;
911 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
912 wlistentries * sizeof(struct snd_soc_dapm_widget *);
913 *list = krealloc(wlist, wlistsize, GFP_KERNEL);
914 if (*list == NULL) {
915 dev_err(w->dapm->dev, "ASoC: can't allocate widget list for %s\n",
916 w->name);
917 return -ENOMEM;
918 }
919 wlist = *list;
920
921 /* insert the widget */
922 dev_dbg(w->dapm->dev, "ASoC: added %s in widget list pos %d\n",
923 w->name, wlist->num_widgets);
924
925 wlist->widgets[wlist->num_widgets] = w;
926 wlist->num_widgets++;
927 return 1;
928 }
929
930 /*
931 * Recursively check for a completed path to an active or physically connected
932 * output widget. Returns number of complete paths.
933 */
934 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
935 struct snd_soc_dapm_widget_list **list)
936 {
937 struct snd_soc_dapm_path *path;
938 int con = 0;
939
940 if (widget->outputs >= 0)
941 return widget->outputs;
942
943 DAPM_UPDATE_STAT(widget, path_checks);
944
945 switch (widget->id) {
946 case snd_soc_dapm_supply:
947 case snd_soc_dapm_regulator_supply:
948 case snd_soc_dapm_clock_supply:
949 case snd_soc_dapm_kcontrol:
950 return 0;
951 default:
952 break;
953 }
954
955 switch (widget->id) {
956 case snd_soc_dapm_adc:
957 case snd_soc_dapm_aif_out:
958 case snd_soc_dapm_dai_out:
959 if (widget->active) {
960 widget->outputs = snd_soc_dapm_suspend_check(widget);
961 return widget->outputs;
962 }
963 default:
964 break;
965 }
966
967 if (widget->connected) {
968 /* connected pin ? */
969 if (widget->id == snd_soc_dapm_output && !widget->ext) {
970 widget->outputs = snd_soc_dapm_suspend_check(widget);
971 return widget->outputs;
972 }
973
974 /* connected jack or spk ? */
975 if (widget->id == snd_soc_dapm_hp ||
976 widget->id == snd_soc_dapm_spk ||
977 (widget->id == snd_soc_dapm_line &&
978 !list_empty(&widget->sources))) {
979 widget->outputs = snd_soc_dapm_suspend_check(widget);
980 return widget->outputs;
981 }
982 }
983
984 list_for_each_entry(path, &widget->sinks, list_source) {
985 DAPM_UPDATE_STAT(widget, neighbour_checks);
986
987 if (path->weak)
988 continue;
989
990 if (path->walking)
991 return 1;
992
993 if (path->walked)
994 continue;
995
996 trace_snd_soc_dapm_output_path(widget, path);
997
998 if (path->sink && path->connect) {
999 path->walked = 1;
1000 path->walking = 1;
1001
1002 /* do we need to add this widget to the list ? */
1003 if (list) {
1004 int err;
1005 err = dapm_list_add_widget(list, path->sink);
1006 if (err < 0) {
1007 dev_err(widget->dapm->dev,
1008 "ASoC: could not add widget %s\n",
1009 widget->name);
1010 path->walking = 0;
1011 return con;
1012 }
1013 }
1014
1015 con += is_connected_output_ep(path->sink, list);
1016
1017 path->walking = 0;
1018 }
1019 }
1020
1021 widget->outputs = con;
1022
1023 return con;
1024 }
1025
1026 /*
1027 * Recursively check for a completed path to an active or physically connected
1028 * input widget. Returns number of complete paths.
1029 */
1030 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
1031 struct snd_soc_dapm_widget_list **list)
1032 {
1033 struct snd_soc_dapm_path *path;
1034 int con = 0;
1035
1036 if (widget->inputs >= 0)
1037 return widget->inputs;
1038
1039 DAPM_UPDATE_STAT(widget, path_checks);
1040
1041 switch (widget->id) {
1042 case snd_soc_dapm_supply:
1043 case snd_soc_dapm_regulator_supply:
1044 case snd_soc_dapm_clock_supply:
1045 case snd_soc_dapm_kcontrol:
1046 return 0;
1047 default:
1048 break;
1049 }
1050
1051 /* active stream ? */
1052 switch (widget->id) {
1053 case snd_soc_dapm_dac:
1054 case snd_soc_dapm_aif_in:
1055 case snd_soc_dapm_dai_in:
1056 if (widget->active) {
1057 widget->inputs = snd_soc_dapm_suspend_check(widget);
1058 return widget->inputs;
1059 }
1060 default:
1061 break;
1062 }
1063
1064 if (widget->connected) {
1065 /* connected pin ? */
1066 if (widget->id == snd_soc_dapm_input && !widget->ext) {
1067 widget->inputs = snd_soc_dapm_suspend_check(widget);
1068 return widget->inputs;
1069 }
1070
1071 /* connected VMID/Bias for lower pops */
1072 if (widget->id == snd_soc_dapm_vmid) {
1073 widget->inputs = snd_soc_dapm_suspend_check(widget);
1074 return widget->inputs;
1075 }
1076
1077 /* connected jack ? */
1078 if (widget->id == snd_soc_dapm_mic ||
1079 (widget->id == snd_soc_dapm_line &&
1080 !list_empty(&widget->sinks))) {
1081 widget->inputs = snd_soc_dapm_suspend_check(widget);
1082 return widget->inputs;
1083 }
1084
1085 /* signal generator */
1086 if (widget->id == snd_soc_dapm_siggen) {
1087 widget->inputs = snd_soc_dapm_suspend_check(widget);
1088 return widget->inputs;
1089 }
1090 }
1091
1092 list_for_each_entry(path, &widget->sources, list_sink) {
1093 DAPM_UPDATE_STAT(widget, neighbour_checks);
1094
1095 if (path->weak)
1096 continue;
1097
1098 if (path->walking)
1099 return 1;
1100
1101 if (path->walked)
1102 continue;
1103
1104 trace_snd_soc_dapm_input_path(widget, path);
1105
1106 if (path->source && path->connect) {
1107 path->walked = 1;
1108 path->walking = 1;
1109
1110 /* do we need to add this widget to the list ? */
1111 if (list) {
1112 int err;
1113 err = dapm_list_add_widget(list, path->source);
1114 if (err < 0) {
1115 dev_err(widget->dapm->dev,
1116 "ASoC: could not add widget %s\n",
1117 widget->name);
1118 path->walking = 0;
1119 return con;
1120 }
1121 }
1122
1123 con += is_connected_input_ep(path->source, list);
1124
1125 path->walking = 0;
1126 }
1127 }
1128
1129 widget->inputs = con;
1130
1131 return con;
1132 }
1133
1134 /**
1135 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1136 * @dai: the soc DAI.
1137 * @stream: stream direction.
1138 * @list: list of active widgets for this stream.
1139 *
1140 * Queries DAPM graph as to whether an valid audio stream path exists for
1141 * the initial stream specified by name. This takes into account
1142 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1143 *
1144 * Returns the number of valid paths or negative error.
1145 */
1146 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1147 struct snd_soc_dapm_widget_list **list)
1148 {
1149 struct snd_soc_card *card = dai->card;
1150 int paths;
1151
1152 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1153 dapm_reset(card);
1154
1155 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1156 paths = is_connected_output_ep(dai->playback_widget, list);
1157 dapm_clear_walk_output(&card->dapm,
1158 &dai->playback_widget->sinks);
1159 } else {
1160 paths = is_connected_input_ep(dai->capture_widget, list);
1161 dapm_clear_walk_input(&card->dapm,
1162 &dai->capture_widget->sources);
1163 }
1164
1165 trace_snd_soc_dapm_connected(paths, stream);
1166 mutex_unlock(&card->dapm_mutex);
1167
1168 return paths;
1169 }
1170
1171 /*
1172 * Handler for generic register modifier widget.
1173 */
1174 int dapm_reg_event(struct snd_soc_dapm_widget *w,
1175 struct snd_kcontrol *kcontrol, int event)
1176 {
1177 unsigned int val;
1178
1179 if (SND_SOC_DAPM_EVENT_ON(event))
1180 val = w->on_val;
1181 else
1182 val = w->off_val;
1183
1184 soc_widget_update_bits_locked(w, -(w->reg + 1),
1185 w->mask << w->shift, val << w->shift);
1186
1187 return 0;
1188 }
1189 EXPORT_SYMBOL_GPL(dapm_reg_event);
1190
1191 /*
1192 * Handler for regulator supply widget.
1193 */
1194 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1195 struct snd_kcontrol *kcontrol, int event)
1196 {
1197 int ret;
1198
1199 if (SND_SOC_DAPM_EVENT_ON(event)) {
1200 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1201 ret = regulator_allow_bypass(w->regulator, false);
1202 if (ret != 0)
1203 dev_warn(w->dapm->dev,
1204 "ASoC: Failed to bypass %s: %d\n",
1205 w->name, ret);
1206 }
1207
1208 return regulator_enable(w->regulator);
1209 } else {
1210 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1211 ret = regulator_allow_bypass(w->regulator, true);
1212 if (ret != 0)
1213 dev_warn(w->dapm->dev,
1214 "ASoC: Failed to unbypass %s: %d\n",
1215 w->name, ret);
1216 }
1217
1218 return regulator_disable_deferred(w->regulator, w->shift);
1219 }
1220 }
1221 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1222
1223 /*
1224 * Handler for clock supply widget.
1225 */
1226 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1227 struct snd_kcontrol *kcontrol, int event)
1228 {
1229 if (!w->clk)
1230 return -EIO;
1231
1232 #ifdef CONFIG_HAVE_CLK
1233 if (SND_SOC_DAPM_EVENT_ON(event)) {
1234 return clk_prepare_enable(w->clk);
1235 } else {
1236 clk_disable_unprepare(w->clk);
1237 return 0;
1238 }
1239 #endif
1240 return 0;
1241 }
1242 EXPORT_SYMBOL_GPL(dapm_clock_event);
1243
1244 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1245 {
1246 if (w->power_checked)
1247 return w->new_power;
1248
1249 if (w->force)
1250 w->new_power = 1;
1251 else
1252 w->new_power = w->power_check(w);
1253
1254 w->power_checked = true;
1255
1256 return w->new_power;
1257 }
1258
1259 /* Generic check to see if a widget should be powered.
1260 */
1261 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1262 {
1263 int in, out;
1264
1265 DAPM_UPDATE_STAT(w, power_checks);
1266
1267 in = is_connected_input_ep(w, NULL);
1268 dapm_clear_walk_input(w->dapm, &w->sources);
1269 out = is_connected_output_ep(w, NULL);
1270 dapm_clear_walk_output(w->dapm, &w->sinks);
1271 return out != 0 && in != 0;
1272 }
1273
1274 /* Check to see if an ADC has power */
1275 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
1276 {
1277 int in;
1278
1279 DAPM_UPDATE_STAT(w, power_checks);
1280
1281 if (w->active) {
1282 in = is_connected_input_ep(w, NULL);
1283 dapm_clear_walk_input(w->dapm, &w->sources);
1284 return in != 0;
1285 } else {
1286 return dapm_generic_check_power(w);
1287 }
1288 }
1289
1290 /* Check to see if a DAC has power */
1291 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
1292 {
1293 int out;
1294
1295 DAPM_UPDATE_STAT(w, power_checks);
1296
1297 if (w->active) {
1298 out = is_connected_output_ep(w, NULL);
1299 dapm_clear_walk_output(w->dapm, &w->sinks);
1300 return out != 0;
1301 } else {
1302 return dapm_generic_check_power(w);
1303 }
1304 }
1305
1306 /* Check to see if a power supply is needed */
1307 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1308 {
1309 struct snd_soc_dapm_path *path;
1310
1311 DAPM_UPDATE_STAT(w, power_checks);
1312
1313 /* Check if one of our outputs is connected */
1314 list_for_each_entry(path, &w->sinks, list_source) {
1315 DAPM_UPDATE_STAT(w, neighbour_checks);
1316
1317 if (path->weak)
1318 continue;
1319
1320 if (path->connected &&
1321 !path->connected(path->source, path->sink))
1322 continue;
1323
1324 if (!path->sink)
1325 continue;
1326
1327 if (dapm_widget_power_check(path->sink))
1328 return 1;
1329 }
1330
1331 return 0;
1332 }
1333
1334 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1335 {
1336 return 1;
1337 }
1338
1339 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1340 struct snd_soc_dapm_widget *b,
1341 bool power_up)
1342 {
1343 int *sort;
1344
1345 if (power_up)
1346 sort = dapm_up_seq;
1347 else
1348 sort = dapm_down_seq;
1349
1350 if (sort[a->id] != sort[b->id])
1351 return sort[a->id] - sort[b->id];
1352 if (a->subseq != b->subseq) {
1353 if (power_up)
1354 return a->subseq - b->subseq;
1355 else
1356 return b->subseq - a->subseq;
1357 }
1358 if (a->reg != b->reg)
1359 return a->reg - b->reg;
1360 if (a->dapm != b->dapm)
1361 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1362
1363 return 0;
1364 }
1365
1366 /* Insert a widget in order into a DAPM power sequence. */
1367 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1368 struct list_head *list,
1369 bool power_up)
1370 {
1371 struct snd_soc_dapm_widget *w;
1372
1373 list_for_each_entry(w, list, power_list)
1374 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1375 list_add_tail(&new_widget->power_list, &w->power_list);
1376 return;
1377 }
1378
1379 list_add_tail(&new_widget->power_list, list);
1380 }
1381
1382 static void dapm_seq_check_event(struct snd_soc_card *card,
1383 struct snd_soc_dapm_widget *w, int event)
1384 {
1385 const char *ev_name;
1386 int power, ret;
1387
1388 switch (event) {
1389 case SND_SOC_DAPM_PRE_PMU:
1390 ev_name = "PRE_PMU";
1391 power = 1;
1392 break;
1393 case SND_SOC_DAPM_POST_PMU:
1394 ev_name = "POST_PMU";
1395 power = 1;
1396 break;
1397 case SND_SOC_DAPM_PRE_PMD:
1398 ev_name = "PRE_PMD";
1399 power = 0;
1400 break;
1401 case SND_SOC_DAPM_POST_PMD:
1402 ev_name = "POST_PMD";
1403 power = 0;
1404 break;
1405 case SND_SOC_DAPM_WILL_PMU:
1406 ev_name = "WILL_PMU";
1407 power = 1;
1408 break;
1409 case SND_SOC_DAPM_WILL_PMD:
1410 ev_name = "WILL_PMD";
1411 power = 0;
1412 break;
1413 default:
1414 BUG();
1415 return;
1416 }
1417
1418 if (w->new_power != power)
1419 return;
1420
1421 if (w->event && (w->event_flags & event)) {
1422 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1423 w->name, ev_name);
1424 trace_snd_soc_dapm_widget_event_start(w, event);
1425 ret = w->event(w, NULL, event);
1426 trace_snd_soc_dapm_widget_event_done(w, event);
1427 if (ret < 0)
1428 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1429 ev_name, w->name, ret);
1430 }
1431 }
1432
1433 /* Apply the coalesced changes from a DAPM sequence */
1434 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1435 struct list_head *pending)
1436 {
1437 struct snd_soc_dapm_widget *w;
1438 int reg;
1439 unsigned int value = 0;
1440 unsigned int mask = 0;
1441
1442 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1443 power_list)->reg;
1444
1445 list_for_each_entry(w, pending, power_list) {
1446 BUG_ON(reg != w->reg);
1447 w->power = w->new_power;
1448
1449 mask |= w->mask << w->shift;
1450 if (w->power)
1451 value |= w->on_val << w->shift;
1452 else
1453 value |= w->off_val << w->shift;
1454
1455 pop_dbg(w->dapm->dev, card->pop_time,
1456 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1457 w->name, reg, value, mask);
1458
1459 /* Check for events */
1460 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1461 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1462 }
1463
1464 if (reg >= 0) {
1465 /* Any widget will do, they should all be updating the
1466 * same register.
1467 */
1468 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1469 power_list);
1470
1471 pop_dbg(w->dapm->dev, card->pop_time,
1472 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1473 value, mask, reg, card->pop_time);
1474 pop_wait(card->pop_time);
1475 soc_widget_update_bits_locked(w, reg, mask, value);
1476 }
1477
1478 list_for_each_entry(w, pending, power_list) {
1479 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1480 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1481 }
1482 }
1483
1484 /* Apply a DAPM power sequence.
1485 *
1486 * We walk over a pre-sorted list of widgets to apply power to. In
1487 * order to minimise the number of writes to the device required
1488 * multiple widgets will be updated in a single write where possible.
1489 * Currently anything that requires more than a single write is not
1490 * handled.
1491 */
1492 static void dapm_seq_run(struct snd_soc_card *card,
1493 struct list_head *list, int event, bool power_up)
1494 {
1495 struct snd_soc_dapm_widget *w, *n;
1496 LIST_HEAD(pending);
1497 int cur_sort = -1;
1498 int cur_subseq = -1;
1499 int cur_reg = SND_SOC_NOPM;
1500 struct snd_soc_dapm_context *cur_dapm = NULL;
1501 int ret, i;
1502 int *sort;
1503
1504 if (power_up)
1505 sort = dapm_up_seq;
1506 else
1507 sort = dapm_down_seq;
1508
1509 list_for_each_entry_safe(w, n, list, power_list) {
1510 ret = 0;
1511
1512 /* Do we need to apply any queued changes? */
1513 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1514 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1515 if (!list_empty(&pending))
1516 dapm_seq_run_coalesced(card, &pending);
1517
1518 if (cur_dapm && cur_dapm->seq_notifier) {
1519 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1520 if (sort[i] == cur_sort)
1521 cur_dapm->seq_notifier(cur_dapm,
1522 i,
1523 cur_subseq);
1524 }
1525
1526 INIT_LIST_HEAD(&pending);
1527 cur_sort = -1;
1528 cur_subseq = INT_MIN;
1529 cur_reg = SND_SOC_NOPM;
1530 cur_dapm = NULL;
1531 }
1532
1533 switch (w->id) {
1534 case snd_soc_dapm_pre:
1535 if (!w->event)
1536 list_for_each_entry_safe_continue(w, n, list,
1537 power_list);
1538
1539 if (event == SND_SOC_DAPM_STREAM_START)
1540 ret = w->event(w,
1541 NULL, SND_SOC_DAPM_PRE_PMU);
1542 else if (event == SND_SOC_DAPM_STREAM_STOP)
1543 ret = w->event(w,
1544 NULL, SND_SOC_DAPM_PRE_PMD);
1545 break;
1546
1547 case snd_soc_dapm_post:
1548 if (!w->event)
1549 list_for_each_entry_safe_continue(w, n, list,
1550 power_list);
1551
1552 if (event == SND_SOC_DAPM_STREAM_START)
1553 ret = w->event(w,
1554 NULL, SND_SOC_DAPM_POST_PMU);
1555 else if (event == SND_SOC_DAPM_STREAM_STOP)
1556 ret = w->event(w,
1557 NULL, SND_SOC_DAPM_POST_PMD);
1558 break;
1559
1560 default:
1561 /* Queue it up for application */
1562 cur_sort = sort[w->id];
1563 cur_subseq = w->subseq;
1564 cur_reg = w->reg;
1565 cur_dapm = w->dapm;
1566 list_move(&w->power_list, &pending);
1567 break;
1568 }
1569
1570 if (ret < 0)
1571 dev_err(w->dapm->dev,
1572 "ASoC: Failed to apply widget power: %d\n", ret);
1573 }
1574
1575 if (!list_empty(&pending))
1576 dapm_seq_run_coalesced(card, &pending);
1577
1578 if (cur_dapm && cur_dapm->seq_notifier) {
1579 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1580 if (sort[i] == cur_sort)
1581 cur_dapm->seq_notifier(cur_dapm,
1582 i, cur_subseq);
1583 }
1584 }
1585
1586 static void dapm_widget_update(struct snd_soc_card *card)
1587 {
1588 struct snd_soc_dapm_update *update = card->update;
1589 struct snd_soc_dapm_widget_list *wlist;
1590 struct snd_soc_dapm_widget *w = NULL;
1591 unsigned int wi;
1592 int ret;
1593
1594 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1595 return;
1596
1597 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1598
1599 for (wi = 0; wi < wlist->num_widgets; wi++) {
1600 w = wlist->widgets[wi];
1601
1602 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1603 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1604 if (ret != 0)
1605 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1606 w->name, ret);
1607 }
1608 }
1609
1610 if (!w)
1611 return;
1612
1613 ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
1614 update->val);
1615 if (ret < 0)
1616 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1617 w->name, ret);
1618
1619 for (wi = 0; wi < wlist->num_widgets; wi++) {
1620 w = wlist->widgets[wi];
1621
1622 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1623 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1624 if (ret != 0)
1625 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1626 w->name, ret);
1627 }
1628 }
1629 }
1630
1631 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1632 * they're changing state.
1633 */
1634 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1635 {
1636 struct snd_soc_dapm_context *d = data;
1637 int ret;
1638
1639 /* If we're off and we're not supposed to be go into STANDBY */
1640 if (d->bias_level == SND_SOC_BIAS_OFF &&
1641 d->target_bias_level != SND_SOC_BIAS_OFF) {
1642 if (d->dev)
1643 pm_runtime_get_sync(d->dev);
1644
1645 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1646 if (ret != 0)
1647 dev_err(d->dev,
1648 "ASoC: Failed to turn on bias: %d\n", ret);
1649 }
1650
1651 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1652 if (d->bias_level != d->target_bias_level) {
1653 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1654 if (ret != 0)
1655 dev_err(d->dev,
1656 "ASoC: Failed to prepare bias: %d\n", ret);
1657 }
1658 }
1659
1660 /* Async callback run prior to DAPM sequences - brings to their final
1661 * state.
1662 */
1663 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1664 {
1665 struct snd_soc_dapm_context *d = data;
1666 int ret;
1667
1668 /* If we just powered the last thing off drop to standby bias */
1669 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1670 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1671 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1672 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1673 if (ret != 0)
1674 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1675 ret);
1676 }
1677
1678 /* If we're in standby and can support bias off then do that */
1679 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1680 d->target_bias_level == SND_SOC_BIAS_OFF) {
1681 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1682 if (ret != 0)
1683 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1684 ret);
1685
1686 if (d->dev)
1687 pm_runtime_put(d->dev);
1688 }
1689
1690 /* If we just powered up then move to active bias */
1691 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1692 d->target_bias_level == SND_SOC_BIAS_ON) {
1693 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1694 if (ret != 0)
1695 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1696 ret);
1697 }
1698 }
1699
1700 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1701 bool power, bool connect)
1702 {
1703 /* If a connection is being made or broken then that update
1704 * will have marked the peer dirty, otherwise the widgets are
1705 * not connected and this update has no impact. */
1706 if (!connect)
1707 return;
1708
1709 /* If the peer is already in the state we're moving to then we
1710 * won't have an impact on it. */
1711 if (power != peer->power)
1712 dapm_mark_dirty(peer, "peer state change");
1713 }
1714
1715 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1716 struct list_head *up_list,
1717 struct list_head *down_list)
1718 {
1719 struct snd_soc_dapm_path *path;
1720
1721 if (w->power == power)
1722 return;
1723
1724 trace_snd_soc_dapm_widget_power(w, power);
1725
1726 /* If we changed our power state perhaps our neigbours changed
1727 * also.
1728 */
1729 list_for_each_entry(path, &w->sources, list_sink) {
1730 if (path->source) {
1731 dapm_widget_set_peer_power(path->source, power,
1732 path->connect);
1733 }
1734 }
1735 switch (w->id) {
1736 case snd_soc_dapm_supply:
1737 case snd_soc_dapm_regulator_supply:
1738 case snd_soc_dapm_clock_supply:
1739 case snd_soc_dapm_kcontrol:
1740 /* Supplies can't affect their outputs, only their inputs */
1741 break;
1742 default:
1743 list_for_each_entry(path, &w->sinks, list_source) {
1744 if (path->sink) {
1745 dapm_widget_set_peer_power(path->sink, power,
1746 path->connect);
1747 }
1748 }
1749 break;
1750 }
1751
1752 if (power)
1753 dapm_seq_insert(w, up_list, true);
1754 else
1755 dapm_seq_insert(w, down_list, false);
1756 }
1757
1758 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1759 struct list_head *up_list,
1760 struct list_head *down_list)
1761 {
1762 int power;
1763
1764 switch (w->id) {
1765 case snd_soc_dapm_pre:
1766 dapm_seq_insert(w, down_list, false);
1767 break;
1768 case snd_soc_dapm_post:
1769 dapm_seq_insert(w, up_list, true);
1770 break;
1771
1772 default:
1773 power = dapm_widget_power_check(w);
1774
1775 dapm_widget_set_power(w, power, up_list, down_list);
1776 break;
1777 }
1778 }
1779
1780 /*
1781 * Scan each dapm widget for complete audio path.
1782 * A complete path is a route that has valid endpoints i.e.:-
1783 *
1784 * o DAC to output pin.
1785 * o Input Pin to ADC.
1786 * o Input pin to Output pin (bypass, sidetone)
1787 * o DAC to ADC (loopback).
1788 */
1789 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1790 {
1791 struct snd_soc_dapm_widget *w;
1792 struct snd_soc_dapm_context *d;
1793 LIST_HEAD(up_list);
1794 LIST_HEAD(down_list);
1795 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1796 enum snd_soc_bias_level bias;
1797
1798 trace_snd_soc_dapm_start(card);
1799
1800 list_for_each_entry(d, &card->dapm_list, list) {
1801 if (d->idle_bias_off)
1802 d->target_bias_level = SND_SOC_BIAS_OFF;
1803 else
1804 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1805 }
1806
1807 dapm_reset(card);
1808
1809 /* Check which widgets we need to power and store them in
1810 * lists indicating if they should be powered up or down. We
1811 * only check widgets that have been flagged as dirty but note
1812 * that new widgets may be added to the dirty list while we
1813 * iterate.
1814 */
1815 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1816 dapm_power_one_widget(w, &up_list, &down_list);
1817 }
1818
1819 list_for_each_entry(w, &card->widgets, list) {
1820 switch (w->id) {
1821 case snd_soc_dapm_pre:
1822 case snd_soc_dapm_post:
1823 /* These widgets always need to be powered */
1824 break;
1825 default:
1826 list_del_init(&w->dirty);
1827 break;
1828 }
1829
1830 if (w->new_power) {
1831 d = w->dapm;
1832
1833 /* Supplies and micbiases only bring the
1834 * context up to STANDBY as unless something
1835 * else is active and passing audio they
1836 * generally don't require full power. Signal
1837 * generators are virtual pins and have no
1838 * power impact themselves.
1839 */
1840 switch (w->id) {
1841 case snd_soc_dapm_siggen:
1842 break;
1843 case snd_soc_dapm_supply:
1844 case snd_soc_dapm_regulator_supply:
1845 case snd_soc_dapm_clock_supply:
1846 case snd_soc_dapm_micbias:
1847 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1848 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1849 break;
1850 default:
1851 d->target_bias_level = SND_SOC_BIAS_ON;
1852 break;
1853 }
1854 }
1855
1856 }
1857
1858 /* Force all contexts in the card to the same bias state if
1859 * they're not ground referenced.
1860 */
1861 bias = SND_SOC_BIAS_OFF;
1862 list_for_each_entry(d, &card->dapm_list, list)
1863 if (d->target_bias_level > bias)
1864 bias = d->target_bias_level;
1865 list_for_each_entry(d, &card->dapm_list, list)
1866 if (!d->idle_bias_off)
1867 d->target_bias_level = bias;
1868
1869 trace_snd_soc_dapm_walk_done(card);
1870
1871 /* Run all the bias changes in parallel */
1872 list_for_each_entry(d, &card->dapm_list, list)
1873 async_schedule_domain(dapm_pre_sequence_async, d,
1874 &async_domain);
1875 async_synchronize_full_domain(&async_domain);
1876
1877 list_for_each_entry(w, &down_list, power_list) {
1878 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
1879 }
1880
1881 list_for_each_entry(w, &up_list, power_list) {
1882 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
1883 }
1884
1885 /* Power down widgets first; try to avoid amplifying pops. */
1886 dapm_seq_run(card, &down_list, event, false);
1887
1888 dapm_widget_update(card);
1889
1890 /* Now power up. */
1891 dapm_seq_run(card, &up_list, event, true);
1892
1893 /* Run all the bias changes in parallel */
1894 list_for_each_entry(d, &card->dapm_list, list)
1895 async_schedule_domain(dapm_post_sequence_async, d,
1896 &async_domain);
1897 async_synchronize_full_domain(&async_domain);
1898
1899 /* do we need to notify any clients that DAPM event is complete */
1900 list_for_each_entry(d, &card->dapm_list, list) {
1901 if (d->stream_event)
1902 d->stream_event(d, event);
1903 }
1904
1905 pop_dbg(card->dev, card->pop_time,
1906 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1907 pop_wait(card->pop_time);
1908
1909 trace_snd_soc_dapm_done(card);
1910
1911 return 0;
1912 }
1913
1914 #ifdef CONFIG_DEBUG_FS
1915 static ssize_t dapm_widget_power_read_file(struct file *file,
1916 char __user *user_buf,
1917 size_t count, loff_t *ppos)
1918 {
1919 struct snd_soc_dapm_widget *w = file->private_data;
1920 char *buf;
1921 int in, out;
1922 ssize_t ret;
1923 struct snd_soc_dapm_path *p = NULL;
1924
1925 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1926 if (!buf)
1927 return -ENOMEM;
1928
1929 in = is_connected_input_ep(w, NULL);
1930 dapm_clear_walk_input(w->dapm, &w->sources);
1931 out = is_connected_output_ep(w, NULL);
1932 dapm_clear_walk_output(w->dapm, &w->sinks);
1933
1934 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1935 w->name, w->power ? "On" : "Off",
1936 w->force ? " (forced)" : "", in, out);
1937
1938 if (w->reg >= 0)
1939 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1940 " - R%d(0x%x) mask 0x%x",
1941 w->reg, w->reg, w->mask << w->shift);
1942
1943 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1944
1945 if (w->sname)
1946 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1947 w->sname,
1948 w->active ? "active" : "inactive");
1949
1950 list_for_each_entry(p, &w->sources, list_sink) {
1951 if (p->connected && !p->connected(w, p->sink))
1952 continue;
1953
1954 if (p->connect)
1955 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1956 " in \"%s\" \"%s\"\n",
1957 p->name ? p->name : "static",
1958 p->source->name);
1959 }
1960 list_for_each_entry(p, &w->sinks, list_source) {
1961 if (p->connected && !p->connected(w, p->sink))
1962 continue;
1963
1964 if (p->connect)
1965 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1966 " out \"%s\" \"%s\"\n",
1967 p->name ? p->name : "static",
1968 p->sink->name);
1969 }
1970
1971 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1972
1973 kfree(buf);
1974 return ret;
1975 }
1976
1977 static const struct file_operations dapm_widget_power_fops = {
1978 .open = simple_open,
1979 .read = dapm_widget_power_read_file,
1980 .llseek = default_llseek,
1981 };
1982
1983 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1984 size_t count, loff_t *ppos)
1985 {
1986 struct snd_soc_dapm_context *dapm = file->private_data;
1987 char *level;
1988
1989 switch (dapm->bias_level) {
1990 case SND_SOC_BIAS_ON:
1991 level = "On\n";
1992 break;
1993 case SND_SOC_BIAS_PREPARE:
1994 level = "Prepare\n";
1995 break;
1996 case SND_SOC_BIAS_STANDBY:
1997 level = "Standby\n";
1998 break;
1999 case SND_SOC_BIAS_OFF:
2000 level = "Off\n";
2001 break;
2002 default:
2003 BUG();
2004 level = "Unknown\n";
2005 break;
2006 }
2007
2008 return simple_read_from_buffer(user_buf, count, ppos, level,
2009 strlen(level));
2010 }
2011
2012 static const struct file_operations dapm_bias_fops = {
2013 .open = simple_open,
2014 .read = dapm_bias_read_file,
2015 .llseek = default_llseek,
2016 };
2017
2018 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2019 struct dentry *parent)
2020 {
2021 struct dentry *d;
2022
2023 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2024
2025 if (!dapm->debugfs_dapm) {
2026 dev_warn(dapm->dev,
2027 "ASoC: Failed to create DAPM debugfs directory\n");
2028 return;
2029 }
2030
2031 d = debugfs_create_file("bias_level", 0444,
2032 dapm->debugfs_dapm, dapm,
2033 &dapm_bias_fops);
2034 if (!d)
2035 dev_warn(dapm->dev,
2036 "ASoC: Failed to create bias level debugfs file\n");
2037 }
2038
2039 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2040 {
2041 struct snd_soc_dapm_context *dapm = w->dapm;
2042 struct dentry *d;
2043
2044 if (!dapm->debugfs_dapm || !w->name)
2045 return;
2046
2047 d = debugfs_create_file(w->name, 0444,
2048 dapm->debugfs_dapm, w,
2049 &dapm_widget_power_fops);
2050 if (!d)
2051 dev_warn(w->dapm->dev,
2052 "ASoC: Failed to create %s debugfs file\n",
2053 w->name);
2054 }
2055
2056 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2057 {
2058 debugfs_remove_recursive(dapm->debugfs_dapm);
2059 }
2060
2061 #else
2062 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2063 struct dentry *parent)
2064 {
2065 }
2066
2067 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2068 {
2069 }
2070
2071 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2072 {
2073 }
2074
2075 #endif
2076
2077 /* test and update the power status of a mux widget */
2078 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2079 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2080 {
2081 struct snd_soc_dapm_path *path;
2082 int found = 0;
2083
2084 /* find dapm widget path assoc with kcontrol */
2085 dapm_kcontrol_for_each_path(path, kcontrol) {
2086 if (!path->name || !e->texts[mux])
2087 continue;
2088
2089 found = 1;
2090 /* we now need to match the string in the enum to the path */
2091 if (!(strcmp(path->name, e->texts[mux]))) {
2092 path->connect = 1; /* new connection */
2093 dapm_mark_dirty(path->source, "mux connection");
2094 } else {
2095 if (path->connect)
2096 dapm_mark_dirty(path->source,
2097 "mux disconnection");
2098 path->connect = 0; /* old connection must be powered down */
2099 }
2100 dapm_mark_dirty(path->sink, "mux change");
2101 }
2102
2103 if (found)
2104 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2105
2106 return found;
2107 }
2108
2109 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2110 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2111 struct snd_soc_dapm_update *update)
2112 {
2113 struct snd_soc_card *card = dapm->card;
2114 int ret;
2115
2116 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2117 card->update = update;
2118 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2119 card->update = NULL;
2120 mutex_unlock(&card->dapm_mutex);
2121 if (ret > 0)
2122 soc_dpcm_runtime_update(card);
2123 return ret;
2124 }
2125 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2126
2127 /* test and update the power status of a mixer or switch widget */
2128 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2129 struct snd_kcontrol *kcontrol, int connect)
2130 {
2131 struct snd_soc_dapm_path *path;
2132 int found = 0;
2133
2134 /* find dapm widget path assoc with kcontrol */
2135 dapm_kcontrol_for_each_path(path, kcontrol) {
2136 found = 1;
2137 path->connect = connect;
2138 dapm_mark_dirty(path->source, "mixer connection");
2139 dapm_mark_dirty(path->sink, "mixer update");
2140 }
2141
2142 if (found)
2143 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2144
2145 return found;
2146 }
2147
2148 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2149 struct snd_kcontrol *kcontrol, int connect,
2150 struct snd_soc_dapm_update *update)
2151 {
2152 struct snd_soc_card *card = dapm->card;
2153 int ret;
2154
2155 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2156 card->update = update;
2157 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2158 card->update = NULL;
2159 mutex_unlock(&card->dapm_mutex);
2160 if (ret > 0)
2161 soc_dpcm_runtime_update(card);
2162 return ret;
2163 }
2164 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2165
2166 /* show dapm widget status in sys fs */
2167 static ssize_t dapm_widget_show(struct device *dev,
2168 struct device_attribute *attr, char *buf)
2169 {
2170 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2171 struct snd_soc_codec *codec =rtd->codec;
2172 struct snd_soc_dapm_widget *w;
2173 int count = 0;
2174 char *state = "not set";
2175
2176 list_for_each_entry(w, &codec->card->widgets, list) {
2177 if (w->dapm != &codec->dapm)
2178 continue;
2179
2180 /* only display widgets that burnm power */
2181 switch (w->id) {
2182 case snd_soc_dapm_hp:
2183 case snd_soc_dapm_mic:
2184 case snd_soc_dapm_spk:
2185 case snd_soc_dapm_line:
2186 case snd_soc_dapm_micbias:
2187 case snd_soc_dapm_dac:
2188 case snd_soc_dapm_adc:
2189 case snd_soc_dapm_pga:
2190 case snd_soc_dapm_out_drv:
2191 case snd_soc_dapm_mixer:
2192 case snd_soc_dapm_mixer_named_ctl:
2193 case snd_soc_dapm_supply:
2194 case snd_soc_dapm_regulator_supply:
2195 case snd_soc_dapm_clock_supply:
2196 if (w->name)
2197 count += sprintf(buf + count, "%s: %s\n",
2198 w->name, w->power ? "On":"Off");
2199 break;
2200 default:
2201 break;
2202 }
2203 }
2204
2205 switch (codec->dapm.bias_level) {
2206 case SND_SOC_BIAS_ON:
2207 state = "On";
2208 break;
2209 case SND_SOC_BIAS_PREPARE:
2210 state = "Prepare";
2211 break;
2212 case SND_SOC_BIAS_STANDBY:
2213 state = "Standby";
2214 break;
2215 case SND_SOC_BIAS_OFF:
2216 state = "Off";
2217 break;
2218 }
2219 count += sprintf(buf + count, "PM State: %s\n", state);
2220
2221 return count;
2222 }
2223
2224 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2225
2226 int snd_soc_dapm_sys_add(struct device *dev)
2227 {
2228 return device_create_file(dev, &dev_attr_dapm_widget);
2229 }
2230
2231 static void snd_soc_dapm_sys_remove(struct device *dev)
2232 {
2233 device_remove_file(dev, &dev_attr_dapm_widget);
2234 }
2235
2236 static void dapm_free_path(struct snd_soc_dapm_path *path)
2237 {
2238 list_del(&path->list_sink);
2239 list_del(&path->list_source);
2240 list_del(&path->list_kcontrol);
2241 list_del(&path->list);
2242 kfree(path);
2243 }
2244
2245 /* free all dapm widgets and resources */
2246 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2247 {
2248 struct snd_soc_dapm_widget *w, *next_w;
2249 struct snd_soc_dapm_path *p, *next_p;
2250
2251 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2252 if (w->dapm != dapm)
2253 continue;
2254 list_del(&w->list);
2255 /*
2256 * remove source and sink paths associated to this widget.
2257 * While removing the path, remove reference to it from both
2258 * source and sink widgets so that path is removed only once.
2259 */
2260 list_for_each_entry_safe(p, next_p, &w->sources, list_sink)
2261 dapm_free_path(p);
2262
2263 list_for_each_entry_safe(p, next_p, &w->sinks, list_source)
2264 dapm_free_path(p);
2265
2266 kfree(w->kcontrols);
2267 kfree(w->name);
2268 kfree(w);
2269 }
2270 }
2271
2272 static struct snd_soc_dapm_widget *dapm_find_widget(
2273 struct snd_soc_dapm_context *dapm, const char *pin,
2274 bool search_other_contexts)
2275 {
2276 struct snd_soc_dapm_widget *w;
2277 struct snd_soc_dapm_widget *fallback = NULL;
2278
2279 list_for_each_entry(w, &dapm->card->widgets, list) {
2280 if (!strcmp(w->name, pin)) {
2281 if (w->dapm == dapm)
2282 return w;
2283 else
2284 fallback = w;
2285 }
2286 }
2287
2288 if (search_other_contexts)
2289 return fallback;
2290
2291 return NULL;
2292 }
2293
2294 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2295 const char *pin, int status)
2296 {
2297 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2298
2299 if (!w) {
2300 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2301 return -EINVAL;
2302 }
2303
2304 if (w->connected != status)
2305 dapm_mark_dirty(w, "pin configuration");
2306
2307 w->connected = status;
2308 if (status == 0)
2309 w->force = 0;
2310
2311 return 0;
2312 }
2313
2314 /**
2315 * snd_soc_dapm_sync - scan and power dapm paths
2316 * @dapm: DAPM context
2317 *
2318 * Walks all dapm audio paths and powers widgets according to their
2319 * stream or path usage.
2320 *
2321 * Returns 0 for success.
2322 */
2323 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2324 {
2325 int ret;
2326
2327 /*
2328 * Suppress early reports (eg, jacks syncing their state) to avoid
2329 * silly DAPM runs during card startup.
2330 */
2331 if (!dapm->card || !dapm->card->instantiated)
2332 return 0;
2333
2334 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2335 ret = dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2336 mutex_unlock(&dapm->card->dapm_mutex);
2337 return ret;
2338 }
2339 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2340
2341 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2342 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2343 const char *control,
2344 int (*connected)(struct snd_soc_dapm_widget *source,
2345 struct snd_soc_dapm_widget *sink))
2346 {
2347 struct snd_soc_dapm_path *path;
2348 int ret;
2349
2350 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2351 if (!path)
2352 return -ENOMEM;
2353
2354 path->source = wsource;
2355 path->sink = wsink;
2356 path->connected = connected;
2357 INIT_LIST_HEAD(&path->list);
2358 INIT_LIST_HEAD(&path->list_source);
2359 INIT_LIST_HEAD(&path->list_sink);
2360
2361 /* check for external widgets */
2362 if (wsink->id == snd_soc_dapm_input) {
2363 if (wsource->id == snd_soc_dapm_micbias ||
2364 wsource->id == snd_soc_dapm_mic ||
2365 wsource->id == snd_soc_dapm_line ||
2366 wsource->id == snd_soc_dapm_output)
2367 wsink->ext = 1;
2368 }
2369 if (wsource->id == snd_soc_dapm_output) {
2370 if (wsink->id == snd_soc_dapm_spk ||
2371 wsink->id == snd_soc_dapm_hp ||
2372 wsink->id == snd_soc_dapm_line ||
2373 wsink->id == snd_soc_dapm_input)
2374 wsource->ext = 1;
2375 }
2376
2377 /* connect static paths */
2378 if (control == NULL) {
2379 list_add(&path->list, &dapm->card->paths);
2380 list_add(&path->list_sink, &wsink->sources);
2381 list_add(&path->list_source, &wsource->sinks);
2382 path->connect = 1;
2383 return 0;
2384 }
2385
2386 /* connect dynamic paths */
2387 switch (wsink->id) {
2388 case snd_soc_dapm_adc:
2389 case snd_soc_dapm_dac:
2390 case snd_soc_dapm_pga:
2391 case snd_soc_dapm_out_drv:
2392 case snd_soc_dapm_input:
2393 case snd_soc_dapm_output:
2394 case snd_soc_dapm_siggen:
2395 case snd_soc_dapm_micbias:
2396 case snd_soc_dapm_vmid:
2397 case snd_soc_dapm_pre:
2398 case snd_soc_dapm_post:
2399 case snd_soc_dapm_supply:
2400 case snd_soc_dapm_regulator_supply:
2401 case snd_soc_dapm_clock_supply:
2402 case snd_soc_dapm_aif_in:
2403 case snd_soc_dapm_aif_out:
2404 case snd_soc_dapm_dai_in:
2405 case snd_soc_dapm_dai_out:
2406 case snd_soc_dapm_dai_link:
2407 case snd_soc_dapm_kcontrol:
2408 list_add(&path->list, &dapm->card->paths);
2409 list_add(&path->list_sink, &wsink->sources);
2410 list_add(&path->list_source, &wsource->sinks);
2411 path->connect = 1;
2412 return 0;
2413 case snd_soc_dapm_mux:
2414 case snd_soc_dapm_virt_mux:
2415 case snd_soc_dapm_value_mux:
2416 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2417 &wsink->kcontrol_news[0]);
2418 if (ret != 0)
2419 goto err;
2420 break;
2421 case snd_soc_dapm_switch:
2422 case snd_soc_dapm_mixer:
2423 case snd_soc_dapm_mixer_named_ctl:
2424 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2425 if (ret != 0)
2426 goto err;
2427 break;
2428 case snd_soc_dapm_hp:
2429 case snd_soc_dapm_mic:
2430 case snd_soc_dapm_line:
2431 case snd_soc_dapm_spk:
2432 list_add(&path->list, &dapm->card->paths);
2433 list_add(&path->list_sink, &wsink->sources);
2434 list_add(&path->list_source, &wsource->sinks);
2435 path->connect = 0;
2436 return 0;
2437 }
2438
2439 dapm_mark_dirty(wsource, "Route added");
2440 dapm_mark_dirty(wsink, "Route added");
2441
2442 return 0;
2443 err:
2444 kfree(path);
2445 return ret;
2446 }
2447
2448 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2449 const struct snd_soc_dapm_route *route)
2450 {
2451 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2452 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2453 const char *sink;
2454 const char *source;
2455 char prefixed_sink[80];
2456 char prefixed_source[80];
2457 int ret;
2458
2459 if (dapm->codec && dapm->codec->name_prefix) {
2460 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2461 dapm->codec->name_prefix, route->sink);
2462 sink = prefixed_sink;
2463 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2464 dapm->codec->name_prefix, route->source);
2465 source = prefixed_source;
2466 } else {
2467 sink = route->sink;
2468 source = route->source;
2469 }
2470
2471 /*
2472 * find src and dest widgets over all widgets but favor a widget from
2473 * current DAPM context
2474 */
2475 list_for_each_entry(w, &dapm->card->widgets, list) {
2476 if (!wsink && !(strcmp(w->name, sink))) {
2477 wtsink = w;
2478 if (w->dapm == dapm)
2479 wsink = w;
2480 continue;
2481 }
2482 if (!wsource && !(strcmp(w->name, source))) {
2483 wtsource = w;
2484 if (w->dapm == dapm)
2485 wsource = w;
2486 }
2487 }
2488 /* use widget from another DAPM context if not found from this */
2489 if (!wsink)
2490 wsink = wtsink;
2491 if (!wsource)
2492 wsource = wtsource;
2493
2494 if (wsource == NULL) {
2495 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2496 route->source);
2497 return -ENODEV;
2498 }
2499 if (wsink == NULL) {
2500 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2501 route->sink);
2502 return -ENODEV;
2503 }
2504
2505 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2506 route->connected);
2507 if (ret)
2508 goto err;
2509
2510 return 0;
2511 err:
2512 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2513 source, route->control, sink);
2514 return ret;
2515 }
2516
2517 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2518 const struct snd_soc_dapm_route *route)
2519 {
2520 struct snd_soc_dapm_path *path, *p;
2521 const char *sink;
2522 const char *source;
2523 char prefixed_sink[80];
2524 char prefixed_source[80];
2525
2526 if (route->control) {
2527 dev_err(dapm->dev,
2528 "ASoC: Removal of routes with controls not supported\n");
2529 return -EINVAL;
2530 }
2531
2532 if (dapm->codec && dapm->codec->name_prefix) {
2533 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2534 dapm->codec->name_prefix, route->sink);
2535 sink = prefixed_sink;
2536 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2537 dapm->codec->name_prefix, route->source);
2538 source = prefixed_source;
2539 } else {
2540 sink = route->sink;
2541 source = route->source;
2542 }
2543
2544 path = NULL;
2545 list_for_each_entry(p, &dapm->card->paths, list) {
2546 if (strcmp(p->source->name, source) != 0)
2547 continue;
2548 if (strcmp(p->sink->name, sink) != 0)
2549 continue;
2550 path = p;
2551 break;
2552 }
2553
2554 if (path) {
2555 dapm_mark_dirty(path->source, "Route removed");
2556 dapm_mark_dirty(path->sink, "Route removed");
2557
2558 dapm_free_path(path);
2559 } else {
2560 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2561 source, sink);
2562 }
2563
2564 return 0;
2565 }
2566
2567 /**
2568 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2569 * @dapm: DAPM context
2570 * @route: audio routes
2571 * @num: number of routes
2572 *
2573 * Connects 2 dapm widgets together via a named audio path. The sink is
2574 * the widget receiving the audio signal, whilst the source is the sender
2575 * of the audio signal.
2576 *
2577 * Returns 0 for success else error. On error all resources can be freed
2578 * with a call to snd_soc_card_free().
2579 */
2580 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2581 const struct snd_soc_dapm_route *route, int num)
2582 {
2583 int i, r, ret = 0;
2584
2585 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2586 for (i = 0; i < num; i++) {
2587 r = snd_soc_dapm_add_route(dapm, route);
2588 if (r < 0) {
2589 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2590 route->source,
2591 route->control ? route->control : "direct",
2592 route->sink);
2593 ret = r;
2594 }
2595 route++;
2596 }
2597 mutex_unlock(&dapm->card->dapm_mutex);
2598
2599 return ret;
2600 }
2601 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2602
2603 /**
2604 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2605 * @dapm: DAPM context
2606 * @route: audio routes
2607 * @num: number of routes
2608 *
2609 * Removes routes from the DAPM context.
2610 */
2611 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2612 const struct snd_soc_dapm_route *route, int num)
2613 {
2614 int i, ret = 0;
2615
2616 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2617 for (i = 0; i < num; i++) {
2618 snd_soc_dapm_del_route(dapm, route);
2619 route++;
2620 }
2621 mutex_unlock(&dapm->card->dapm_mutex);
2622
2623 return ret;
2624 }
2625 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2626
2627 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2628 const struct snd_soc_dapm_route *route)
2629 {
2630 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2631 route->source,
2632 true);
2633 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2634 route->sink,
2635 true);
2636 struct snd_soc_dapm_path *path;
2637 int count = 0;
2638
2639 if (!source) {
2640 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2641 route->source);
2642 return -ENODEV;
2643 }
2644
2645 if (!sink) {
2646 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2647 route->sink);
2648 return -ENODEV;
2649 }
2650
2651 if (route->control || route->connected)
2652 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2653 route->source, route->sink);
2654
2655 list_for_each_entry(path, &source->sinks, list_source) {
2656 if (path->sink == sink) {
2657 path->weak = 1;
2658 count++;
2659 }
2660 }
2661
2662 if (count == 0)
2663 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2664 route->source, route->sink);
2665 if (count > 1)
2666 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2667 count, route->source, route->sink);
2668
2669 return 0;
2670 }
2671
2672 /**
2673 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2674 * @dapm: DAPM context
2675 * @route: audio routes
2676 * @num: number of routes
2677 *
2678 * Mark existing routes matching those specified in the passed array
2679 * as being weak, meaning that they are ignored for the purpose of
2680 * power decisions. The main intended use case is for sidetone paths
2681 * which couple audio between other independent paths if they are both
2682 * active in order to make the combination work better at the user
2683 * level but which aren't intended to be "used".
2684 *
2685 * Note that CODEC drivers should not use this as sidetone type paths
2686 * can frequently also be used as bypass paths.
2687 */
2688 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2689 const struct snd_soc_dapm_route *route, int num)
2690 {
2691 int i, err;
2692 int ret = 0;
2693
2694 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2695 for (i = 0; i < num; i++) {
2696 err = snd_soc_dapm_weak_route(dapm, route);
2697 if (err)
2698 ret = err;
2699 route++;
2700 }
2701 mutex_unlock(&dapm->card->dapm_mutex);
2702
2703 return ret;
2704 }
2705 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2706
2707 /**
2708 * snd_soc_dapm_new_widgets - add new dapm widgets
2709 * @dapm: DAPM context
2710 *
2711 * Checks the codec for any new dapm widgets and creates them if found.
2712 *
2713 * Returns 0 for success.
2714 */
2715 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2716 {
2717 struct snd_soc_card *card = dapm->card;
2718 struct snd_soc_dapm_widget *w;
2719 unsigned int val;
2720
2721 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2722
2723 list_for_each_entry(w, &card->widgets, list)
2724 {
2725 if (w->new)
2726 continue;
2727
2728 if (w->num_kcontrols) {
2729 w->kcontrols = kzalloc(w->num_kcontrols *
2730 sizeof(struct snd_kcontrol *),
2731 GFP_KERNEL);
2732 if (!w->kcontrols) {
2733 mutex_unlock(&card->dapm_mutex);
2734 return -ENOMEM;
2735 }
2736 }
2737
2738 switch(w->id) {
2739 case snd_soc_dapm_switch:
2740 case snd_soc_dapm_mixer:
2741 case snd_soc_dapm_mixer_named_ctl:
2742 dapm_new_mixer(w);
2743 break;
2744 case snd_soc_dapm_mux:
2745 case snd_soc_dapm_virt_mux:
2746 case snd_soc_dapm_value_mux:
2747 dapm_new_mux(w);
2748 break;
2749 case snd_soc_dapm_pga:
2750 case snd_soc_dapm_out_drv:
2751 dapm_new_pga(w);
2752 break;
2753 default:
2754 break;
2755 }
2756
2757 /* Read the initial power state from the device */
2758 if (w->reg >= 0) {
2759 val = soc_widget_read(w, w->reg) >> w->shift;
2760 val &= w->mask;
2761 if (val == w->on_val)
2762 w->power = 1;
2763 }
2764
2765 w->new = 1;
2766
2767 dapm_mark_dirty(w, "new widget");
2768 dapm_debugfs_add_widget(w);
2769 }
2770
2771 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2772 mutex_unlock(&card->dapm_mutex);
2773 return 0;
2774 }
2775 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2776
2777 /**
2778 * snd_soc_dapm_get_volsw - dapm mixer get callback
2779 * @kcontrol: mixer control
2780 * @ucontrol: control element information
2781 *
2782 * Callback to get the value of a dapm mixer control.
2783 *
2784 * Returns 0 for success.
2785 */
2786 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2787 struct snd_ctl_elem_value *ucontrol)
2788 {
2789 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2790 struct snd_soc_card *card = codec->card;
2791 struct soc_mixer_control *mc =
2792 (struct soc_mixer_control *)kcontrol->private_value;
2793 unsigned int reg = mc->reg;
2794 unsigned int shift = mc->shift;
2795 int max = mc->max;
2796 unsigned int mask = (1 << fls(max)) - 1;
2797 unsigned int invert = mc->invert;
2798 unsigned int val;
2799
2800 if (snd_soc_volsw_is_stereo(mc))
2801 dev_warn(codec->dapm.dev,
2802 "ASoC: Control '%s' is stereo, which is not supported\n",
2803 kcontrol->id.name);
2804
2805 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2806 if (dapm_kcontrol_is_powered(kcontrol))
2807 val = (snd_soc_read(codec, reg) >> shift) & mask;
2808 else
2809 val = dapm_kcontrol_get_value(kcontrol);
2810 mutex_unlock(&card->dapm_mutex);
2811
2812 if (invert)
2813 ucontrol->value.integer.value[0] = max - val;
2814 else
2815 ucontrol->value.integer.value[0] = val;
2816
2817 return 0;
2818 }
2819 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2820
2821 /**
2822 * snd_soc_dapm_put_volsw - dapm mixer set callback
2823 * @kcontrol: mixer control
2824 * @ucontrol: control element information
2825 *
2826 * Callback to set the value of a dapm mixer control.
2827 *
2828 * Returns 0 for success.
2829 */
2830 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2831 struct snd_ctl_elem_value *ucontrol)
2832 {
2833 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2834 struct snd_soc_card *card = codec->card;
2835 struct soc_mixer_control *mc =
2836 (struct soc_mixer_control *)kcontrol->private_value;
2837 unsigned int reg = mc->reg;
2838 unsigned int shift = mc->shift;
2839 int max = mc->max;
2840 unsigned int mask = (1 << fls(max)) - 1;
2841 unsigned int invert = mc->invert;
2842 unsigned int val;
2843 int connect, change;
2844 struct snd_soc_dapm_update update;
2845
2846 if (snd_soc_volsw_is_stereo(mc))
2847 dev_warn(codec->dapm.dev,
2848 "ASoC: Control '%s' is stereo, which is not supported\n",
2849 kcontrol->id.name);
2850
2851 val = (ucontrol->value.integer.value[0] & mask);
2852 connect = !!val;
2853
2854 if (invert)
2855 val = max - val;
2856
2857 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2858
2859 dapm_kcontrol_set_value(kcontrol, val);
2860
2861 mask = mask << shift;
2862 val = val << shift;
2863
2864 change = snd_soc_test_bits(codec, reg, mask, val);
2865 if (change) {
2866 update.kcontrol = kcontrol;
2867 update.reg = reg;
2868 update.mask = mask;
2869 update.val = val;
2870
2871 card->update = &update;
2872
2873 soc_dapm_mixer_update_power(card, kcontrol, connect);
2874
2875 card->update = NULL;
2876 }
2877
2878 mutex_unlock(&card->dapm_mutex);
2879 return change;
2880 }
2881 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2882
2883 /**
2884 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2885 * @kcontrol: mixer control
2886 * @ucontrol: control element information
2887 *
2888 * Callback to get the value of a dapm enumerated double mixer control.
2889 *
2890 * Returns 0 for success.
2891 */
2892 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2893 struct snd_ctl_elem_value *ucontrol)
2894 {
2895 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2896 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2897 unsigned int val;
2898
2899 val = snd_soc_read(codec, e->reg);
2900 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & e->mask;
2901 if (e->shift_l != e->shift_r)
2902 ucontrol->value.enumerated.item[1] =
2903 (val >> e->shift_r) & e->mask;
2904
2905 return 0;
2906 }
2907 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2908
2909 /**
2910 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2911 * @kcontrol: mixer control
2912 * @ucontrol: control element information
2913 *
2914 * Callback to set the value of a dapm enumerated double mixer control.
2915 *
2916 * Returns 0 for success.
2917 */
2918 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2919 struct snd_ctl_elem_value *ucontrol)
2920 {
2921 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2922 struct snd_soc_card *card = codec->card;
2923 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2924 unsigned int val, mux, change;
2925 unsigned int mask;
2926 struct snd_soc_dapm_update update;
2927
2928 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2929 return -EINVAL;
2930 mux = ucontrol->value.enumerated.item[0];
2931 val = mux << e->shift_l;
2932 mask = e->mask << e->shift_l;
2933 if (e->shift_l != e->shift_r) {
2934 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2935 return -EINVAL;
2936 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2937 mask |= e->mask << e->shift_r;
2938 }
2939
2940 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2941
2942 change = snd_soc_test_bits(codec, e->reg, mask, val);
2943 if (change) {
2944 update.kcontrol = kcontrol;
2945 update.reg = e->reg;
2946 update.mask = mask;
2947 update.val = val;
2948 card->update = &update;
2949
2950 soc_dapm_mux_update_power(card, kcontrol, mux, e);
2951
2952 card->update = NULL;
2953 }
2954
2955 mutex_unlock(&card->dapm_mutex);
2956 return change;
2957 }
2958 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2959
2960 /**
2961 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2962 * @kcontrol: mixer control
2963 * @ucontrol: control element information
2964 *
2965 * Returns 0 for success.
2966 */
2967 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2968 struct snd_ctl_elem_value *ucontrol)
2969 {
2970 ucontrol->value.enumerated.item[0] = dapm_kcontrol_get_value(kcontrol);
2971 return 0;
2972 }
2973 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2974
2975 /**
2976 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2977 * @kcontrol: mixer control
2978 * @ucontrol: control element information
2979 *
2980 * Returns 0 for success.
2981 */
2982 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2983 struct snd_ctl_elem_value *ucontrol)
2984 {
2985 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2986 struct snd_soc_card *card = codec->card;
2987 unsigned int value;
2988 struct soc_enum *e =
2989 (struct soc_enum *)kcontrol->private_value;
2990 int change;
2991
2992 if (ucontrol->value.enumerated.item[0] >= e->max)
2993 return -EINVAL;
2994
2995 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2996
2997 value = ucontrol->value.enumerated.item[0];
2998 change = dapm_kcontrol_set_value(kcontrol, value);
2999 if (change)
3000 soc_dapm_mux_update_power(card, kcontrol, value, e);
3001
3002 mutex_unlock(&card->dapm_mutex);
3003 return change;
3004 }
3005 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
3006
3007 /**
3008 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
3009 * callback
3010 * @kcontrol: mixer control
3011 * @ucontrol: control element information
3012 *
3013 * Callback to get the value of a dapm semi enumerated double mixer control.
3014 *
3015 * Semi enumerated mixer: the enumerated items are referred as values. Can be
3016 * used for handling bitfield coded enumeration for example.
3017 *
3018 * Returns 0 for success.
3019 */
3020 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
3021 struct snd_ctl_elem_value *ucontrol)
3022 {
3023 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
3024 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3025 unsigned int reg_val, val, mux;
3026
3027 reg_val = snd_soc_read(codec, e->reg);
3028 val = (reg_val >> e->shift_l) & e->mask;
3029 for (mux = 0; mux < e->max; mux++) {
3030 if (val == e->values[mux])
3031 break;
3032 }
3033 ucontrol->value.enumerated.item[0] = mux;
3034 if (e->shift_l != e->shift_r) {
3035 val = (reg_val >> e->shift_r) & e->mask;
3036 for (mux = 0; mux < e->max; mux++) {
3037 if (val == e->values[mux])
3038 break;
3039 }
3040 ucontrol->value.enumerated.item[1] = mux;
3041 }
3042
3043 return 0;
3044 }
3045 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
3046
3047 /**
3048 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
3049 * callback
3050 * @kcontrol: mixer control
3051 * @ucontrol: control element information
3052 *
3053 * Callback to set the value of a dapm semi enumerated double mixer control.
3054 *
3055 * Semi enumerated mixer: the enumerated items are referred as values. Can be
3056 * used for handling bitfield coded enumeration for example.
3057 *
3058 * Returns 0 for success.
3059 */
3060 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
3061 struct snd_ctl_elem_value *ucontrol)
3062 {
3063 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
3064 struct snd_soc_card *card = codec->card;
3065 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3066 unsigned int val, mux, change;
3067 unsigned int mask;
3068 struct snd_soc_dapm_update update;
3069
3070 if (ucontrol->value.enumerated.item[0] > e->max - 1)
3071 return -EINVAL;
3072 mux = ucontrol->value.enumerated.item[0];
3073 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
3074 mask = e->mask << e->shift_l;
3075 if (e->shift_l != e->shift_r) {
3076 if (ucontrol->value.enumerated.item[1] > e->max - 1)
3077 return -EINVAL;
3078 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
3079 mask |= e->mask << e->shift_r;
3080 }
3081
3082 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3083
3084 change = snd_soc_test_bits(codec, e->reg, mask, val);
3085 if (change) {
3086 update.kcontrol = kcontrol;
3087 update.reg = e->reg;
3088 update.mask = mask;
3089 update.val = val;
3090 card->update = &update;
3091
3092 soc_dapm_mux_update_power(card, kcontrol, mux, e);
3093
3094 card->update = NULL;
3095 }
3096
3097 mutex_unlock(&card->dapm_mutex);
3098 return change;
3099 }
3100 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
3101
3102 /**
3103 * snd_soc_dapm_info_pin_switch - Info for a pin switch
3104 *
3105 * @kcontrol: mixer control
3106 * @uinfo: control element information
3107 *
3108 * Callback to provide information about a pin switch control.
3109 */
3110 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3111 struct snd_ctl_elem_info *uinfo)
3112 {
3113 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3114 uinfo->count = 1;
3115 uinfo->value.integer.min = 0;
3116 uinfo->value.integer.max = 1;
3117
3118 return 0;
3119 }
3120 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3121
3122 /**
3123 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3124 *
3125 * @kcontrol: mixer control
3126 * @ucontrol: Value
3127 */
3128 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3129 struct snd_ctl_elem_value *ucontrol)
3130 {
3131 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3132 const char *pin = (const char *)kcontrol->private_value;
3133
3134 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3135
3136 ucontrol->value.integer.value[0] =
3137 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3138
3139 mutex_unlock(&card->dapm_mutex);
3140
3141 return 0;
3142 }
3143 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3144
3145 /**
3146 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3147 *
3148 * @kcontrol: mixer control
3149 * @ucontrol: Value
3150 */
3151 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3152 struct snd_ctl_elem_value *ucontrol)
3153 {
3154 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3155 const char *pin = (const char *)kcontrol->private_value;
3156
3157 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3158
3159 if (ucontrol->value.integer.value[0])
3160 snd_soc_dapm_enable_pin(&card->dapm, pin);
3161 else
3162 snd_soc_dapm_disable_pin(&card->dapm, pin);
3163
3164 mutex_unlock(&card->dapm_mutex);
3165
3166 snd_soc_dapm_sync(&card->dapm);
3167 return 0;
3168 }
3169 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3170
3171 static struct snd_soc_dapm_widget *
3172 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3173 const struct snd_soc_dapm_widget *widget)
3174 {
3175 struct snd_soc_dapm_widget *w;
3176 int ret;
3177
3178 if ((w = dapm_cnew_widget(widget)) == NULL)
3179 return NULL;
3180
3181 switch (w->id) {
3182 case snd_soc_dapm_regulator_supply:
3183 w->regulator = devm_regulator_get(dapm->dev, w->name);
3184 if (IS_ERR(w->regulator)) {
3185 ret = PTR_ERR(w->regulator);
3186 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3187 w->name, ret);
3188 return NULL;
3189 }
3190
3191 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3192 ret = regulator_allow_bypass(w->regulator, true);
3193 if (ret != 0)
3194 dev_warn(w->dapm->dev,
3195 "ASoC: Failed to unbypass %s: %d\n",
3196 w->name, ret);
3197 }
3198 break;
3199 case snd_soc_dapm_clock_supply:
3200 #ifdef CONFIG_CLKDEV_LOOKUP
3201 w->clk = devm_clk_get(dapm->dev, w->name);
3202 if (IS_ERR(w->clk)) {
3203 ret = PTR_ERR(w->clk);
3204 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3205 w->name, ret);
3206 return NULL;
3207 }
3208 #else
3209 return NULL;
3210 #endif
3211 break;
3212 default:
3213 break;
3214 }
3215
3216 if (dapm->codec && dapm->codec->name_prefix)
3217 w->name = kasprintf(GFP_KERNEL, "%s %s",
3218 dapm->codec->name_prefix, widget->name);
3219 else
3220 w->name = kasprintf(GFP_KERNEL, "%s", widget->name);
3221
3222 if (w->name == NULL) {
3223 kfree(w);
3224 return NULL;
3225 }
3226
3227 switch (w->id) {
3228 case snd_soc_dapm_switch:
3229 case snd_soc_dapm_mixer:
3230 case snd_soc_dapm_mixer_named_ctl:
3231 w->power_check = dapm_generic_check_power;
3232 break;
3233 case snd_soc_dapm_mux:
3234 case snd_soc_dapm_virt_mux:
3235 case snd_soc_dapm_value_mux:
3236 w->power_check = dapm_generic_check_power;
3237 break;
3238 case snd_soc_dapm_dai_out:
3239 w->power_check = dapm_adc_check_power;
3240 break;
3241 case snd_soc_dapm_dai_in:
3242 w->power_check = dapm_dac_check_power;
3243 break;
3244 case snd_soc_dapm_adc:
3245 case snd_soc_dapm_aif_out:
3246 case snd_soc_dapm_dac:
3247 case snd_soc_dapm_aif_in:
3248 case snd_soc_dapm_pga:
3249 case snd_soc_dapm_out_drv:
3250 case snd_soc_dapm_input:
3251 case snd_soc_dapm_output:
3252 case snd_soc_dapm_micbias:
3253 case snd_soc_dapm_spk:
3254 case snd_soc_dapm_hp:
3255 case snd_soc_dapm_mic:
3256 case snd_soc_dapm_line:
3257 case snd_soc_dapm_dai_link:
3258 w->power_check = dapm_generic_check_power;
3259 break;
3260 case snd_soc_dapm_supply:
3261 case snd_soc_dapm_regulator_supply:
3262 case snd_soc_dapm_clock_supply:
3263 case snd_soc_dapm_kcontrol:
3264 w->power_check = dapm_supply_check_power;
3265 break;
3266 default:
3267 w->power_check = dapm_always_on_check_power;
3268 break;
3269 }
3270
3271 w->dapm = dapm;
3272 w->codec = dapm->codec;
3273 w->platform = dapm->platform;
3274 INIT_LIST_HEAD(&w->sources);
3275 INIT_LIST_HEAD(&w->sinks);
3276 INIT_LIST_HEAD(&w->list);
3277 INIT_LIST_HEAD(&w->dirty);
3278 list_add(&w->list, &dapm->card->widgets);
3279
3280 /* machine layer set ups unconnected pins and insertions */
3281 w->connected = 1;
3282 return w;
3283 }
3284
3285 /**
3286 * snd_soc_dapm_new_controls - create new dapm controls
3287 * @dapm: DAPM context
3288 * @widget: widget array
3289 * @num: number of widgets
3290 *
3291 * Creates new DAPM controls based upon the templates.
3292 *
3293 * Returns 0 for success else error.
3294 */
3295 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3296 const struct snd_soc_dapm_widget *widget,
3297 int num)
3298 {
3299 struct snd_soc_dapm_widget *w;
3300 int i;
3301 int ret = 0;
3302
3303 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3304 for (i = 0; i < num; i++) {
3305 w = snd_soc_dapm_new_control(dapm, widget);
3306 if (!w) {
3307 dev_err(dapm->dev,
3308 "ASoC: Failed to create DAPM control %s\n",
3309 widget->name);
3310 ret = -ENOMEM;
3311 break;
3312 }
3313 widget++;
3314 }
3315 mutex_unlock(&dapm->card->dapm_mutex);
3316 return ret;
3317 }
3318 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3319
3320 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3321 struct snd_kcontrol *kcontrol, int event)
3322 {
3323 struct snd_soc_dapm_path *source_p, *sink_p;
3324 struct snd_soc_dai *source, *sink;
3325 const struct snd_soc_pcm_stream *config = w->params;
3326 struct snd_pcm_substream substream;
3327 struct snd_pcm_hw_params *params = NULL;
3328 u64 fmt;
3329 int ret;
3330
3331 BUG_ON(!config);
3332 BUG_ON(list_empty(&w->sources) || list_empty(&w->sinks));
3333
3334 /* We only support a single source and sink, pick the first */
3335 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3336 list_sink);
3337 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3338 list_source);
3339
3340 BUG_ON(!source_p || !sink_p);
3341 BUG_ON(!sink_p->source || !source_p->sink);
3342 BUG_ON(!source_p->source || !sink_p->sink);
3343
3344 source = source_p->source->priv;
3345 sink = sink_p->sink->priv;
3346
3347 /* Be a little careful as we don't want to overflow the mask array */
3348 if (config->formats) {
3349 fmt = ffs(config->formats) - 1;
3350 } else {
3351 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3352 config->formats);
3353 fmt = 0;
3354 }
3355
3356 /* Currently very limited parameter selection */
3357 params = kzalloc(sizeof(*params), GFP_KERNEL);
3358 if (!params) {
3359 ret = -ENOMEM;
3360 goto out;
3361 }
3362 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3363
3364 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3365 config->rate_min;
3366 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3367 config->rate_max;
3368
3369 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3370 = config->channels_min;
3371 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3372 = config->channels_max;
3373
3374 memset(&substream, 0, sizeof(substream));
3375
3376 switch (event) {
3377 case SND_SOC_DAPM_PRE_PMU:
3378 if (source->driver->ops && source->driver->ops->hw_params) {
3379 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3380 ret = source->driver->ops->hw_params(&substream,
3381 params, source);
3382 if (ret != 0) {
3383 dev_err(source->dev,
3384 "ASoC: hw_params() failed: %d\n", ret);
3385 goto out;
3386 }
3387 }
3388
3389 if (sink->driver->ops && sink->driver->ops->hw_params) {
3390 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3391 ret = sink->driver->ops->hw_params(&substream, params,
3392 sink);
3393 if (ret != 0) {
3394 dev_err(sink->dev,
3395 "ASoC: hw_params() failed: %d\n", ret);
3396 goto out;
3397 }
3398 }
3399 break;
3400
3401 case SND_SOC_DAPM_POST_PMU:
3402 ret = snd_soc_dai_digital_mute(sink, 0,
3403 SNDRV_PCM_STREAM_PLAYBACK);
3404 if (ret != 0 && ret != -ENOTSUPP)
3405 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3406 ret = 0;
3407 break;
3408
3409 case SND_SOC_DAPM_PRE_PMD:
3410 ret = snd_soc_dai_digital_mute(sink, 1,
3411 SNDRV_PCM_STREAM_PLAYBACK);
3412 if (ret != 0 && ret != -ENOTSUPP)
3413 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3414 ret = 0;
3415 break;
3416
3417 default:
3418 BUG();
3419 return -EINVAL;
3420 }
3421
3422 out:
3423 kfree(params);
3424 return ret;
3425 }
3426
3427 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3428 const struct snd_soc_pcm_stream *params,
3429 struct snd_soc_dapm_widget *source,
3430 struct snd_soc_dapm_widget *sink)
3431 {
3432 struct snd_soc_dapm_route routes[2];
3433 struct snd_soc_dapm_widget template;
3434 struct snd_soc_dapm_widget *w;
3435 size_t len;
3436 char *link_name;
3437
3438 len = strlen(source->name) + strlen(sink->name) + 2;
3439 link_name = devm_kzalloc(card->dev, len, GFP_KERNEL);
3440 if (!link_name)
3441 return -ENOMEM;
3442 snprintf(link_name, len, "%s-%s", source->name, sink->name);
3443
3444 memset(&template, 0, sizeof(template));
3445 template.reg = SND_SOC_NOPM;
3446 template.id = snd_soc_dapm_dai_link;
3447 template.name = link_name;
3448 template.event = snd_soc_dai_link_event;
3449 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3450 SND_SOC_DAPM_PRE_PMD;
3451
3452 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3453
3454 w = snd_soc_dapm_new_control(&card->dapm, &template);
3455 if (!w) {
3456 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3457 link_name);
3458 return -ENOMEM;
3459 }
3460
3461 w->params = params;
3462
3463 memset(&routes, 0, sizeof(routes));
3464
3465 routes[0].source = source->name;
3466 routes[0].sink = link_name;
3467 routes[1].source = link_name;
3468 routes[1].sink = sink->name;
3469
3470 return snd_soc_dapm_add_routes(&card->dapm, routes,
3471 ARRAY_SIZE(routes));
3472 }
3473
3474 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3475 struct snd_soc_dai *dai)
3476 {
3477 struct snd_soc_dapm_widget template;
3478 struct snd_soc_dapm_widget *w;
3479
3480 WARN_ON(dapm->dev != dai->dev);
3481
3482 memset(&template, 0, sizeof(template));
3483 template.reg = SND_SOC_NOPM;
3484
3485 if (dai->driver->playback.stream_name) {
3486 template.id = snd_soc_dapm_dai_in;
3487 template.name = dai->driver->playback.stream_name;
3488 template.sname = dai->driver->playback.stream_name;
3489
3490 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3491 template.name);
3492
3493 w = snd_soc_dapm_new_control(dapm, &template);
3494 if (!w) {
3495 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3496 dai->driver->playback.stream_name);
3497 }
3498
3499 w->priv = dai;
3500 dai->playback_widget = w;
3501 }
3502
3503 if (dai->driver->capture.stream_name) {
3504 template.id = snd_soc_dapm_dai_out;
3505 template.name = dai->driver->capture.stream_name;
3506 template.sname = dai->driver->capture.stream_name;
3507
3508 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3509 template.name);
3510
3511 w = snd_soc_dapm_new_control(dapm, &template);
3512 if (!w) {
3513 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3514 dai->driver->capture.stream_name);
3515 }
3516
3517 w->priv = dai;
3518 dai->capture_widget = w;
3519 }
3520
3521 return 0;
3522 }
3523
3524 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3525 {
3526 struct snd_soc_dapm_widget *dai_w, *w;
3527 struct snd_soc_dai *dai;
3528
3529 /* For each DAI widget... */
3530 list_for_each_entry(dai_w, &card->widgets, list) {
3531 switch (dai_w->id) {
3532 case snd_soc_dapm_dai_in:
3533 case snd_soc_dapm_dai_out:
3534 break;
3535 default:
3536 continue;
3537 }
3538
3539 dai = dai_w->priv;
3540
3541 /* ...find all widgets with the same stream and link them */
3542 list_for_each_entry(w, &card->widgets, list) {
3543 if (w->dapm != dai_w->dapm)
3544 continue;
3545
3546 switch (w->id) {
3547 case snd_soc_dapm_dai_in:
3548 case snd_soc_dapm_dai_out:
3549 continue;
3550 default:
3551 break;
3552 }
3553
3554 if (!w->sname)
3555 continue;
3556
3557 if (dai->driver->playback.stream_name &&
3558 strstr(w->sname,
3559 dai->driver->playback.stream_name)) {
3560 dev_dbg(dai->dev, "%s -> %s\n",
3561 dai->playback_widget->name, w->name);
3562
3563 snd_soc_dapm_add_path(w->dapm,
3564 dai->playback_widget, w, NULL, NULL);
3565 }
3566
3567 if (dai->driver->capture.stream_name &&
3568 strstr(w->sname,
3569 dai->driver->capture.stream_name)) {
3570 dev_dbg(dai->dev, "%s -> %s\n",
3571 w->name, dai->capture_widget->name);
3572
3573 snd_soc_dapm_add_path(w->dapm, w,
3574 dai->capture_widget, NULL, NULL);
3575 }
3576 }
3577 }
3578
3579 return 0;
3580 }
3581
3582 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3583 int event)
3584 {
3585
3586 struct snd_soc_dapm_widget *w_cpu, *w_codec;
3587 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3588 struct snd_soc_dai *codec_dai = rtd->codec_dai;
3589
3590 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
3591 w_cpu = cpu_dai->playback_widget;
3592 w_codec = codec_dai->playback_widget;
3593 } else {
3594 w_cpu = cpu_dai->capture_widget;
3595 w_codec = codec_dai->capture_widget;
3596 }
3597
3598 if (w_cpu) {
3599
3600 dapm_mark_dirty(w_cpu, "stream event");
3601
3602 switch (event) {
3603 case SND_SOC_DAPM_STREAM_START:
3604 w_cpu->active = 1;
3605 break;
3606 case SND_SOC_DAPM_STREAM_STOP:
3607 w_cpu->active = 0;
3608 break;
3609 case SND_SOC_DAPM_STREAM_SUSPEND:
3610 case SND_SOC_DAPM_STREAM_RESUME:
3611 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3612 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3613 break;
3614 }
3615 }
3616
3617 if (w_codec) {
3618
3619 dapm_mark_dirty(w_codec, "stream event");
3620
3621 switch (event) {
3622 case SND_SOC_DAPM_STREAM_START:
3623 w_codec->active = 1;
3624 break;
3625 case SND_SOC_DAPM_STREAM_STOP:
3626 w_codec->active = 0;
3627 break;
3628 case SND_SOC_DAPM_STREAM_SUSPEND:
3629 case SND_SOC_DAPM_STREAM_RESUME:
3630 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3631 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3632 break;
3633 }
3634 }
3635
3636 dapm_power_widgets(rtd->card, event);
3637 }
3638
3639 /**
3640 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3641 * @rtd: PCM runtime data
3642 * @stream: stream name
3643 * @event: stream event
3644 *
3645 * Sends a stream event to the dapm core. The core then makes any
3646 * necessary widget power changes.
3647 *
3648 * Returns 0 for success else error.
3649 */
3650 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3651 int event)
3652 {
3653 struct snd_soc_card *card = rtd->card;
3654
3655 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3656 soc_dapm_stream_event(rtd, stream, event);
3657 mutex_unlock(&card->dapm_mutex);
3658 }
3659
3660 /**
3661 * snd_soc_dapm_enable_pin - enable pin.
3662 * @dapm: DAPM context
3663 * @pin: pin name
3664 *
3665 * Enables input/output pin and its parents or children widgets iff there is
3666 * a valid audio route and active audio stream.
3667 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3668 * do any widget power switching.
3669 */
3670 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3671 {
3672 return snd_soc_dapm_set_pin(dapm, pin, 1);
3673 }
3674 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3675
3676 /**
3677 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3678 * @dapm: DAPM context
3679 * @pin: pin name
3680 *
3681 * Enables input/output pin regardless of any other state. This is
3682 * intended for use with microphone bias supplies used in microphone
3683 * jack detection.
3684 *
3685 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3686 * do any widget power switching.
3687 */
3688 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3689 const char *pin)
3690 {
3691 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3692
3693 if (!w) {
3694 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3695 return -EINVAL;
3696 }
3697
3698 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
3699 w->connected = 1;
3700 w->force = 1;
3701 dapm_mark_dirty(w, "force enable");
3702
3703 return 0;
3704 }
3705 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3706
3707 /**
3708 * snd_soc_dapm_disable_pin - disable pin.
3709 * @dapm: DAPM context
3710 * @pin: pin name
3711 *
3712 * Disables input/output pin and its parents or children widgets.
3713 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3714 * do any widget power switching.
3715 */
3716 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3717 const char *pin)
3718 {
3719 return snd_soc_dapm_set_pin(dapm, pin, 0);
3720 }
3721 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3722
3723 /**
3724 * snd_soc_dapm_nc_pin - permanently disable pin.
3725 * @dapm: DAPM context
3726 * @pin: pin name
3727 *
3728 * Marks the specified pin as being not connected, disabling it along
3729 * any parent or child widgets. At present this is identical to
3730 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3731 * additional things such as disabling controls which only affect
3732 * paths through the pin.
3733 *
3734 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3735 * do any widget power switching.
3736 */
3737 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3738 {
3739 return snd_soc_dapm_set_pin(dapm, pin, 0);
3740 }
3741 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3742
3743 /**
3744 * snd_soc_dapm_get_pin_status - get audio pin status
3745 * @dapm: DAPM context
3746 * @pin: audio signal pin endpoint (or start point)
3747 *
3748 * Get audio pin status - connected or disconnected.
3749 *
3750 * Returns 1 for connected otherwise 0.
3751 */
3752 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3753 const char *pin)
3754 {
3755 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3756
3757 if (w)
3758 return w->connected;
3759
3760 return 0;
3761 }
3762 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3763
3764 /**
3765 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3766 * @dapm: DAPM context
3767 * @pin: audio signal pin endpoint (or start point)
3768 *
3769 * Mark the given endpoint or pin as ignoring suspend. When the
3770 * system is disabled a path between two endpoints flagged as ignoring
3771 * suspend will not be disabled. The path must already be enabled via
3772 * normal means at suspend time, it will not be turned on if it was not
3773 * already enabled.
3774 */
3775 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3776 const char *pin)
3777 {
3778 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3779
3780 if (!w) {
3781 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3782 return -EINVAL;
3783 }
3784
3785 w->ignore_suspend = 1;
3786
3787 return 0;
3788 }
3789 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3790
3791 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3792 struct snd_soc_dapm_widget *w)
3793 {
3794 struct snd_soc_dapm_path *p;
3795
3796 list_for_each_entry(p, &card->paths, list) {
3797 if ((p->source == w) || (p->sink == w)) {
3798 dev_dbg(card->dev,
3799 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3800 p->source->name, p->source->id, p->source->dapm,
3801 p->sink->name, p->sink->id, p->sink->dapm);
3802
3803 /* Connected to something other than the codec */
3804 if (p->source->dapm != p->sink->dapm)
3805 return true;
3806 /*
3807 * Loopback connection from codec external pin to
3808 * codec external pin
3809 */
3810 if (p->sink->id == snd_soc_dapm_input) {
3811 switch (p->source->id) {
3812 case snd_soc_dapm_output:
3813 case snd_soc_dapm_micbias:
3814 return true;
3815 default:
3816 break;
3817 }
3818 }
3819 }
3820 }
3821
3822 return false;
3823 }
3824
3825 /**
3826 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3827 * @codec: The codec whose pins should be processed
3828 *
3829 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3830 * which are unused. Pins are used if they are connected externally to the
3831 * codec, whether that be to some other device, or a loop-back connection to
3832 * the codec itself.
3833 */
3834 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3835 {
3836 struct snd_soc_card *card = codec->card;
3837 struct snd_soc_dapm_context *dapm = &codec->dapm;
3838 struct snd_soc_dapm_widget *w;
3839
3840 dev_dbg(codec->dev, "ASoC: Auto NC: DAPMs: card:%p codec:%p\n",
3841 &card->dapm, &codec->dapm);
3842
3843 list_for_each_entry(w, &card->widgets, list) {
3844 if (w->dapm != dapm)
3845 continue;
3846 switch (w->id) {
3847 case snd_soc_dapm_input:
3848 case snd_soc_dapm_output:
3849 case snd_soc_dapm_micbias:
3850 dev_dbg(codec->dev, "ASoC: Auto NC: Checking widget %s\n",
3851 w->name);
3852 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3853 dev_dbg(codec->dev,
3854 "... Not in map; disabling\n");
3855 snd_soc_dapm_nc_pin(dapm, w->name);
3856 }
3857 break;
3858 default:
3859 break;
3860 }
3861 }
3862 }
3863
3864 /**
3865 * snd_soc_dapm_free - free dapm resources
3866 * @dapm: DAPM context
3867 *
3868 * Free all dapm widgets and resources.
3869 */
3870 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3871 {
3872 snd_soc_dapm_sys_remove(dapm->dev);
3873 dapm_debugfs_cleanup(dapm);
3874 dapm_free_widgets(dapm);
3875 list_del(&dapm->list);
3876 }
3877 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3878
3879 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3880 {
3881 struct snd_soc_card *card = dapm->card;
3882 struct snd_soc_dapm_widget *w;
3883 LIST_HEAD(down_list);
3884 int powerdown = 0;
3885
3886 mutex_lock(&card->dapm_mutex);
3887
3888 list_for_each_entry(w, &dapm->card->widgets, list) {
3889 if (w->dapm != dapm)
3890 continue;
3891 if (w->power) {
3892 dapm_seq_insert(w, &down_list, false);
3893 w->power = 0;
3894 powerdown = 1;
3895 }
3896 }
3897
3898 /* If there were no widgets to power down we're already in
3899 * standby.
3900 */
3901 if (powerdown) {
3902 if (dapm->bias_level == SND_SOC_BIAS_ON)
3903 snd_soc_dapm_set_bias_level(dapm,
3904 SND_SOC_BIAS_PREPARE);
3905 dapm_seq_run(card, &down_list, 0, false);
3906 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3907 snd_soc_dapm_set_bias_level(dapm,
3908 SND_SOC_BIAS_STANDBY);
3909 }
3910
3911 mutex_unlock(&card->dapm_mutex);
3912 }
3913
3914 /*
3915 * snd_soc_dapm_shutdown - callback for system shutdown
3916 */
3917 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3918 {
3919 struct snd_soc_codec *codec;
3920
3921 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
3922 soc_dapm_shutdown_codec(&codec->dapm);
3923 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3924 snd_soc_dapm_set_bias_level(&codec->dapm,
3925 SND_SOC_BIAS_OFF);
3926 }
3927 }
3928
3929 /* Module information */
3930 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3931 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3932 MODULE_LICENSE("GPL");
(deprecated) Btrfs devel tree