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Merge branch 'for-linus' of git://git.kernel.dk/linux-block
[deliverable/linux.git] / sound / soc / soc-dapm.c
1 /*
2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * Features:
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
15 * DACs/ADCs.
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/headphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
20 * sinks, dacs, etc
21 * o Delayed power down of audio subsystem to reduce pops between a quick
22 * device reopen.
23 *
24 */
25
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/init.h>
29 #include <linux/async.h>
30 #include <linux/delay.h>
31 #include <linux/pm.h>
32 #include <linux/bitops.h>
33 #include <linux/platform_device.h>
34 #include <linux/jiffies.h>
35 #include <linux/debugfs.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/regulator/consumer.h>
38 #include <linux/clk.h>
39 #include <linux/slab.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc.h>
44 #include <sound/initval.h>
45
46 #include <trace/events/asoc.h>
47
48 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
49
50 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
51 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
52 const char *control,
53 int (*connected)(struct snd_soc_dapm_widget *source,
54 struct snd_soc_dapm_widget *sink));
55 static struct snd_soc_dapm_widget *
56 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
57 const struct snd_soc_dapm_widget *widget);
58
59 /* dapm power sequences - make this per codec in the future */
60 static int dapm_up_seq[] = {
61 [snd_soc_dapm_pre] = 0,
62 [snd_soc_dapm_regulator_supply] = 1,
63 [snd_soc_dapm_clock_supply] = 1,
64 [snd_soc_dapm_supply] = 2,
65 [snd_soc_dapm_micbias] = 3,
66 [snd_soc_dapm_dai_link] = 2,
67 [snd_soc_dapm_dai_in] = 4,
68 [snd_soc_dapm_dai_out] = 4,
69 [snd_soc_dapm_aif_in] = 4,
70 [snd_soc_dapm_aif_out] = 4,
71 [snd_soc_dapm_mic] = 5,
72 [snd_soc_dapm_mux] = 6,
73 [snd_soc_dapm_virt_mux] = 6,
74 [snd_soc_dapm_value_mux] = 6,
75 [snd_soc_dapm_dac] = 7,
76 [snd_soc_dapm_switch] = 8,
77 [snd_soc_dapm_mixer] = 8,
78 [snd_soc_dapm_mixer_named_ctl] = 8,
79 [snd_soc_dapm_pga] = 9,
80 [snd_soc_dapm_adc] = 10,
81 [snd_soc_dapm_out_drv] = 11,
82 [snd_soc_dapm_hp] = 11,
83 [snd_soc_dapm_spk] = 11,
84 [snd_soc_dapm_line] = 11,
85 [snd_soc_dapm_kcontrol] = 12,
86 [snd_soc_dapm_post] = 13,
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_supply] = 12,
113 [snd_soc_dapm_clock_supply] = 13,
114 [snd_soc_dapm_regulator_supply] = 13,
115 [snd_soc_dapm_post] = 14,
116 };
117
118 static void pop_wait(u32 pop_time)
119 {
120 if (pop_time)
121 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
122 }
123
124 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
125 {
126 va_list args;
127 char *buf;
128
129 if (!pop_time)
130 return;
131
132 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
133 if (buf == NULL)
134 return;
135
136 va_start(args, fmt);
137 vsnprintf(buf, PAGE_SIZE, fmt, args);
138 dev_info(dev, "%s", buf);
139 va_end(args);
140
141 kfree(buf);
142 }
143
144 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
145 {
146 return !list_empty(&w->dirty);
147 }
148
149 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
150 {
151 if (!dapm_dirty_widget(w)) {
152 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
153 w->name, reason);
154 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
155 }
156 }
157 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
158
159 void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm)
160 {
161 struct snd_soc_card *card = dapm->card;
162 struct snd_soc_dapm_widget *w;
163
164 mutex_lock(&card->dapm_mutex);
165
166 list_for_each_entry(w, &card->widgets, list) {
167 switch (w->id) {
168 case snd_soc_dapm_input:
169 case snd_soc_dapm_output:
170 dapm_mark_dirty(w, "Rechecking inputs and outputs");
171 break;
172 default:
173 break;
174 }
175 }
176
177 mutex_unlock(&card->dapm_mutex);
178 }
179 EXPORT_SYMBOL_GPL(dapm_mark_io_dirty);
180
181 /* create a new dapm widget */
182 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
183 const struct snd_soc_dapm_widget *_widget)
184 {
185 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
186 }
187
188 struct dapm_kcontrol_data {
189 unsigned int value;
190 struct snd_soc_dapm_widget *widget;
191 struct list_head paths;
192 struct snd_soc_dapm_widget_list *wlist;
193 };
194
195 static int dapm_kcontrol_data_alloc(struct snd_soc_dapm_widget *widget,
196 struct snd_kcontrol *kcontrol)
197 {
198 struct dapm_kcontrol_data *data;
199 struct soc_mixer_control *mc;
200
201 data = kzalloc(sizeof(*data), GFP_KERNEL);
202 if (!data) {
203 dev_err(widget->dapm->dev,
204 "ASoC: can't allocate kcontrol data for %s\n",
205 widget->name);
206 return -ENOMEM;
207 }
208
209 INIT_LIST_HEAD(&data->paths);
210
211 switch (widget->id) {
212 case snd_soc_dapm_switch:
213 case snd_soc_dapm_mixer:
214 case snd_soc_dapm_mixer_named_ctl:
215 mc = (struct soc_mixer_control *)kcontrol->private_value;
216
217 if (mc->autodisable) {
218 struct snd_soc_dapm_widget template;
219
220 memset(&template, 0, sizeof(template));
221 template.reg = mc->reg;
222 template.mask = (1 << fls(mc->max)) - 1;
223 template.shift = mc->shift;
224 if (mc->invert)
225 template.off_val = mc->max;
226 else
227 template.off_val = 0;
228 template.on_val = template.off_val;
229 template.id = snd_soc_dapm_kcontrol;
230 template.name = kcontrol->id.name;
231
232 data->value = template.on_val;
233
234 data->widget = snd_soc_dapm_new_control(widget->dapm,
235 &template);
236 if (!data->widget) {
237 kfree(data);
238 return -ENOMEM;
239 }
240 }
241 break;
242 default:
243 break;
244 }
245
246 kcontrol->private_data = data;
247
248 return 0;
249 }
250
251 static void dapm_kcontrol_free(struct snd_kcontrol *kctl)
252 {
253 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kctl);
254 kfree(data->widget);
255 kfree(data->wlist);
256 kfree(data);
257 }
258
259 static struct snd_soc_dapm_widget_list *dapm_kcontrol_get_wlist(
260 const struct snd_kcontrol *kcontrol)
261 {
262 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
263
264 return data->wlist;
265 }
266
267 static int dapm_kcontrol_add_widget(struct snd_kcontrol *kcontrol,
268 struct snd_soc_dapm_widget *widget)
269 {
270 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
271 struct snd_soc_dapm_widget_list *new_wlist;
272 unsigned int n;
273
274 if (data->wlist)
275 n = data->wlist->num_widgets + 1;
276 else
277 n = 1;
278
279 new_wlist = krealloc(data->wlist,
280 sizeof(*new_wlist) + sizeof(widget) * n, GFP_KERNEL);
281 if (!new_wlist)
282 return -ENOMEM;
283
284 new_wlist->widgets[n - 1] = widget;
285 new_wlist->num_widgets = n;
286
287 data->wlist = new_wlist;
288
289 return 0;
290 }
291
292 static void dapm_kcontrol_add_path(const struct snd_kcontrol *kcontrol,
293 struct snd_soc_dapm_path *path)
294 {
295 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
296
297 list_add_tail(&path->list_kcontrol, &data->paths);
298
299 if (data->widget) {
300 snd_soc_dapm_add_path(data->widget->dapm, data->widget,
301 path->source, NULL, NULL);
302 }
303 }
304
305 static bool dapm_kcontrol_is_powered(const struct snd_kcontrol *kcontrol)
306 {
307 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
308
309 if (!data->widget)
310 return true;
311
312 return data->widget->power;
313 }
314
315 static struct list_head *dapm_kcontrol_get_path_list(
316 const struct snd_kcontrol *kcontrol)
317 {
318 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
319
320 return &data->paths;
321 }
322
323 #define dapm_kcontrol_for_each_path(path, kcontrol) \
324 list_for_each_entry(path, dapm_kcontrol_get_path_list(kcontrol), \
325 list_kcontrol)
326
327 static unsigned int dapm_kcontrol_get_value(const struct snd_kcontrol *kcontrol)
328 {
329 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
330
331 return data->value;
332 }
333
334 static bool dapm_kcontrol_set_value(const struct snd_kcontrol *kcontrol,
335 unsigned int value)
336 {
337 struct dapm_kcontrol_data *data = snd_kcontrol_chip(kcontrol);
338
339 if (data->value == value)
340 return false;
341
342 if (data->widget)
343 data->widget->on_val = value;
344
345 data->value = value;
346
347 return true;
348 }
349
350 /**
351 * snd_soc_dapm_kcontrol_codec() - Returns the codec associated to a kcontrol
352 * @kcontrol: The kcontrol
353 */
354 struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(struct snd_kcontrol *kcontrol)
355 {
356 return dapm_kcontrol_get_wlist(kcontrol)->widgets[0]->codec;
357 }
358 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_codec);
359
360 static void dapm_reset(struct snd_soc_card *card)
361 {
362 struct snd_soc_dapm_widget *w;
363
364 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
365
366 list_for_each_entry(w, &card->widgets, list) {
367 w->new_power = w->power;
368 w->power_checked = false;
369 w->inputs = -1;
370 w->outputs = -1;
371 }
372 }
373
374 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg,
375 unsigned int *value)
376 {
377 if (w->codec) {
378 *value = snd_soc_read(w->codec, reg);
379 return 0;
380 } else if (w->platform) {
381 *value = snd_soc_platform_read(w->platform, reg);
382 return 0;
383 }
384
385 dev_err(w->dapm->dev, "ASoC: no valid widget read method\n");
386 return -1;
387 }
388
389 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
390 {
391 if (w->codec)
392 return snd_soc_write(w->codec, reg, val);
393 else if (w->platform)
394 return snd_soc_platform_write(w->platform, reg, val);
395
396 dev_err(w->dapm->dev, "ASoC: no valid widget write method\n");
397 return -1;
398 }
399
400 static inline void soc_widget_lock(struct snd_soc_dapm_widget *w)
401 {
402 if (w->codec && !w->codec->using_regmap)
403 mutex_lock(&w->codec->mutex);
404 else if (w->platform)
405 mutex_lock(&w->platform->mutex);
406 }
407
408 static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w)
409 {
410 if (w->codec && !w->codec->using_regmap)
411 mutex_unlock(&w->codec->mutex);
412 else if (w->platform)
413 mutex_unlock(&w->platform->mutex);
414 }
415
416 static void soc_dapm_async_complete(struct snd_soc_dapm_context *dapm)
417 {
418 if (dapm->codec && dapm->codec->using_regmap)
419 regmap_async_complete(dapm->codec->control_data);
420 }
421
422 static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
423 unsigned short reg, unsigned int mask, unsigned int value)
424 {
425 bool change;
426 unsigned int old, new;
427 int ret;
428
429 if (w->codec && w->codec->using_regmap) {
430 ret = regmap_update_bits_check_async(w->codec->control_data,
431 reg, mask, value,
432 &change);
433 if (ret != 0)
434 return ret;
435 } else {
436 soc_widget_lock(w);
437 ret = soc_widget_read(w, reg, &old);
438 if (ret < 0) {
439 soc_widget_unlock(w);
440 return ret;
441 }
442
443 new = (old & ~mask) | (value & mask);
444 change = old != new;
445 if (change) {
446 ret = soc_widget_write(w, reg, new);
447 if (ret < 0) {
448 soc_widget_unlock(w);
449 return ret;
450 }
451 }
452 soc_widget_unlock(w);
453 }
454
455 return change;
456 }
457
458 /**
459 * snd_soc_dapm_set_bias_level - set the bias level for the system
460 * @dapm: DAPM context
461 * @level: level to configure
462 *
463 * Configure the bias (power) levels for the SoC audio device.
464 *
465 * Returns 0 for success else error.
466 */
467 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
468 enum snd_soc_bias_level level)
469 {
470 struct snd_soc_card *card = dapm->card;
471 int ret = 0;
472
473 trace_snd_soc_bias_level_start(card, level);
474
475 if (card && card->set_bias_level)
476 ret = card->set_bias_level(card, dapm, level);
477 if (ret != 0)
478 goto out;
479
480 if (dapm->codec) {
481 if (dapm->codec->driver->set_bias_level)
482 ret = dapm->codec->driver->set_bias_level(dapm->codec,
483 level);
484 else
485 dapm->bias_level = level;
486 } else if (!card || dapm != &card->dapm) {
487 dapm->bias_level = level;
488 }
489
490 if (ret != 0)
491 goto out;
492
493 if (card && card->set_bias_level_post)
494 ret = card->set_bias_level_post(card, dapm, level);
495 out:
496 trace_snd_soc_bias_level_done(card, level);
497
498 return ret;
499 }
500
501 /* set up initial codec paths */
502 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
503 struct snd_soc_dapm_path *p, int i)
504 {
505 switch (w->id) {
506 case snd_soc_dapm_switch:
507 case snd_soc_dapm_mixer:
508 case snd_soc_dapm_mixer_named_ctl: {
509 int val;
510 struct soc_mixer_control *mc = (struct soc_mixer_control *)
511 w->kcontrol_news[i].private_value;
512 int reg = mc->reg;
513 unsigned int shift = mc->shift;
514 int max = mc->max;
515 unsigned int mask = (1 << fls(max)) - 1;
516 unsigned int invert = mc->invert;
517
518 if (reg != SND_SOC_NOPM) {
519 soc_widget_read(w, reg, &val);
520 val = (val >> shift) & mask;
521 if (invert)
522 val = max - val;
523 p->connect = !!val;
524 } else {
525 p->connect = 0;
526 }
527
528 }
529 break;
530 case snd_soc_dapm_mux: {
531 struct soc_enum *e = (struct soc_enum *)
532 w->kcontrol_news[i].private_value;
533 int val, item;
534
535 soc_widget_read(w, e->reg, &val);
536 item = (val >> e->shift_l) & e->mask;
537
538 if (item < e->max && !strcmp(p->name, e->texts[item]))
539 p->connect = 1;
540 else
541 p->connect = 0;
542 }
543 break;
544 case snd_soc_dapm_virt_mux: {
545 struct soc_enum *e = (struct soc_enum *)
546 w->kcontrol_news[i].private_value;
547
548 p->connect = 0;
549 /* since a virtual mux has no backing registers to
550 * decide which path to connect, it will try to match
551 * with the first enumeration. This is to ensure
552 * that the default mux choice (the first) will be
553 * correctly powered up during initialization.
554 */
555 if (!strcmp(p->name, e->texts[0]))
556 p->connect = 1;
557 }
558 break;
559 case snd_soc_dapm_value_mux: {
560 struct soc_enum *e = (struct soc_enum *)
561 w->kcontrol_news[i].private_value;
562 int val, item;
563
564 soc_widget_read(w, e->reg, &val);
565 val = (val >> e->shift_l) & e->mask;
566 for (item = 0; item < e->max; item++) {
567 if (val == e->values[item])
568 break;
569 }
570
571 if (item < e->max && !strcmp(p->name, e->texts[item]))
572 p->connect = 1;
573 else
574 p->connect = 0;
575 }
576 break;
577 /* does not affect routing - always connected */
578 case snd_soc_dapm_pga:
579 case snd_soc_dapm_out_drv:
580 case snd_soc_dapm_output:
581 case snd_soc_dapm_adc:
582 case snd_soc_dapm_input:
583 case snd_soc_dapm_siggen:
584 case snd_soc_dapm_dac:
585 case snd_soc_dapm_micbias:
586 case snd_soc_dapm_vmid:
587 case snd_soc_dapm_supply:
588 case snd_soc_dapm_regulator_supply:
589 case snd_soc_dapm_clock_supply:
590 case snd_soc_dapm_aif_in:
591 case snd_soc_dapm_aif_out:
592 case snd_soc_dapm_dai_in:
593 case snd_soc_dapm_dai_out:
594 case snd_soc_dapm_hp:
595 case snd_soc_dapm_mic:
596 case snd_soc_dapm_spk:
597 case snd_soc_dapm_line:
598 case snd_soc_dapm_dai_link:
599 case snd_soc_dapm_kcontrol:
600 p->connect = 1;
601 break;
602 /* does affect routing - dynamically connected */
603 case snd_soc_dapm_pre:
604 case snd_soc_dapm_post:
605 p->connect = 0;
606 break;
607 }
608 }
609
610 /* connect mux widget to its interconnecting audio paths */
611 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
612 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
613 struct snd_soc_dapm_path *path, const char *control_name,
614 const struct snd_kcontrol_new *kcontrol)
615 {
616 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
617 int i;
618
619 for (i = 0; i < e->max; i++) {
620 if (!(strcmp(control_name, e->texts[i]))) {
621 list_add(&path->list, &dapm->card->paths);
622 list_add(&path->list_sink, &dest->sources);
623 list_add(&path->list_source, &src->sinks);
624 path->name = (char*)e->texts[i];
625 dapm_set_path_status(dest, path, 0);
626 return 0;
627 }
628 }
629
630 return -ENODEV;
631 }
632
633 /* connect mixer widget to its interconnecting audio paths */
634 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
635 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
636 struct snd_soc_dapm_path *path, const char *control_name)
637 {
638 int i;
639
640 /* search for mixer kcontrol */
641 for (i = 0; i < dest->num_kcontrols; i++) {
642 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
643 list_add(&path->list, &dapm->card->paths);
644 list_add(&path->list_sink, &dest->sources);
645 list_add(&path->list_source, &src->sinks);
646 path->name = dest->kcontrol_news[i].name;
647 dapm_set_path_status(dest, path, i);
648 return 0;
649 }
650 }
651 return -ENODEV;
652 }
653
654 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
655 struct snd_soc_dapm_widget *kcontrolw,
656 const struct snd_kcontrol_new *kcontrol_new,
657 struct snd_kcontrol **kcontrol)
658 {
659 struct snd_soc_dapm_widget *w;
660 int i;
661
662 *kcontrol = NULL;
663
664 list_for_each_entry(w, &dapm->card->widgets, list) {
665 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
666 continue;
667 for (i = 0; i < w->num_kcontrols; i++) {
668 if (&w->kcontrol_news[i] == kcontrol_new) {
669 if (w->kcontrols)
670 *kcontrol = w->kcontrols[i];
671 return 1;
672 }
673 }
674 }
675
676 return 0;
677 }
678
679 /*
680 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
681 * create it. Either way, add the widget into the control's widget list
682 */
683 static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w,
684 int kci)
685 {
686 struct snd_soc_dapm_context *dapm = w->dapm;
687 struct snd_card *card = dapm->card->snd_card;
688 const char *prefix;
689 size_t prefix_len;
690 int shared;
691 struct snd_kcontrol *kcontrol;
692 bool wname_in_long_name, kcname_in_long_name;
693 char *long_name;
694 const char *name;
695 int ret;
696
697 if (dapm->codec)
698 prefix = dapm->codec->name_prefix;
699 else
700 prefix = NULL;
701
702 if (prefix)
703 prefix_len = strlen(prefix) + 1;
704 else
705 prefix_len = 0;
706
707 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
708 &kcontrol);
709
710 if (!kcontrol) {
711 if (shared) {
712 wname_in_long_name = false;
713 kcname_in_long_name = true;
714 } else {
715 switch (w->id) {
716 case snd_soc_dapm_switch:
717 case snd_soc_dapm_mixer:
718 wname_in_long_name = true;
719 kcname_in_long_name = true;
720 break;
721 case snd_soc_dapm_mixer_named_ctl:
722 wname_in_long_name = false;
723 kcname_in_long_name = true;
724 break;
725 case snd_soc_dapm_mux:
726 case snd_soc_dapm_virt_mux:
727 case snd_soc_dapm_value_mux:
728 wname_in_long_name = true;
729 kcname_in_long_name = false;
730 break;
731 default:
732 return -EINVAL;
733 }
734 }
735
736 if (wname_in_long_name && kcname_in_long_name) {
737 /*
738 * The control will get a prefix from the control
739 * creation process but we're also using the same
740 * prefix for widgets so cut the prefix off the
741 * front of the widget name.
742 */
743 long_name = kasprintf(GFP_KERNEL, "%s %s",
744 w->name + prefix_len,
745 w->kcontrol_news[kci].name);
746 if (long_name == NULL)
747 return -ENOMEM;
748
749 name = long_name;
750 } else if (wname_in_long_name) {
751 long_name = NULL;
752 name = w->name + prefix_len;
753 } else {
754 long_name = NULL;
755 name = w->kcontrol_news[kci].name;
756 }
757
758 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], NULL, name,
759 prefix);
760 kfree(long_name);
761 if (!kcontrol)
762 return -ENOMEM;
763 kcontrol->private_free = dapm_kcontrol_free;
764
765 ret = dapm_kcontrol_data_alloc(w, kcontrol);
766 if (ret) {
767 snd_ctl_free_one(kcontrol);
768 return ret;
769 }
770
771 ret = snd_ctl_add(card, kcontrol);
772 if (ret < 0) {
773 dev_err(dapm->dev,
774 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
775 w->name, name, ret);
776 return ret;
777 }
778 }
779
780 ret = dapm_kcontrol_add_widget(kcontrol, w);
781 if (ret)
782 return ret;
783
784 w->kcontrols[kci] = kcontrol;
785
786 return 0;
787 }
788
789 /* create new dapm mixer control */
790 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
791 {
792 int i, ret;
793 struct snd_soc_dapm_path *path;
794
795 /* add kcontrol */
796 for (i = 0; i < w->num_kcontrols; i++) {
797 /* match name */
798 list_for_each_entry(path, &w->sources, list_sink) {
799 /* mixer/mux paths name must match control name */
800 if (path->name != (char *)w->kcontrol_news[i].name)
801 continue;
802
803 if (w->kcontrols[i]) {
804 dapm_kcontrol_add_path(w->kcontrols[i], path);
805 continue;
806 }
807
808 ret = dapm_create_or_share_mixmux_kcontrol(w, i);
809 if (ret < 0)
810 return ret;
811
812 dapm_kcontrol_add_path(w->kcontrols[i], path);
813 }
814 }
815
816 return 0;
817 }
818
819 /* create new dapm mux control */
820 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
821 {
822 struct snd_soc_dapm_context *dapm = w->dapm;
823 struct snd_soc_dapm_path *path;
824 int ret;
825
826 if (w->num_kcontrols != 1) {
827 dev_err(dapm->dev,
828 "ASoC: mux %s has incorrect number of controls\n",
829 w->name);
830 return -EINVAL;
831 }
832
833 if (list_empty(&w->sources)) {
834 dev_err(dapm->dev, "ASoC: mux %s has no paths\n", w->name);
835 return -EINVAL;
836 }
837
838 ret = dapm_create_or_share_mixmux_kcontrol(w, 0);
839 if (ret < 0)
840 return ret;
841
842 list_for_each_entry(path, &w->sources, list_sink)
843 dapm_kcontrol_add_path(w->kcontrols[0], path);
844
845 return 0;
846 }
847
848 /* create new dapm volume control */
849 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
850 {
851 if (w->num_kcontrols)
852 dev_err(w->dapm->dev,
853 "ASoC: PGA controls not supported: '%s'\n", w->name);
854
855 return 0;
856 }
857
858 /* reset 'walked' bit for each dapm path */
859 static void dapm_clear_walk_output(struct snd_soc_dapm_context *dapm,
860 struct list_head *sink)
861 {
862 struct snd_soc_dapm_path *p;
863
864 list_for_each_entry(p, sink, list_source) {
865 if (p->walked) {
866 p->walked = 0;
867 dapm_clear_walk_output(dapm, &p->sink->sinks);
868 }
869 }
870 }
871
872 static void dapm_clear_walk_input(struct snd_soc_dapm_context *dapm,
873 struct list_head *source)
874 {
875 struct snd_soc_dapm_path *p;
876
877 list_for_each_entry(p, source, list_sink) {
878 if (p->walked) {
879 p->walked = 0;
880 dapm_clear_walk_input(dapm, &p->source->sources);
881 }
882 }
883 }
884
885
886 /* We implement power down on suspend by checking the power state of
887 * the ALSA card - when we are suspending the ALSA state for the card
888 * is set to D3.
889 */
890 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
891 {
892 int level = snd_power_get_state(widget->dapm->card->snd_card);
893
894 switch (level) {
895 case SNDRV_CTL_POWER_D3hot:
896 case SNDRV_CTL_POWER_D3cold:
897 if (widget->ignore_suspend)
898 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
899 widget->name);
900 return widget->ignore_suspend;
901 default:
902 return 1;
903 }
904 }
905
906 /* add widget to list if it's not already in the list */
907 static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list,
908 struct snd_soc_dapm_widget *w)
909 {
910 struct snd_soc_dapm_widget_list *wlist;
911 int wlistsize, wlistentries, i;
912
913 if (*list == NULL)
914 return -EINVAL;
915
916 wlist = *list;
917
918 /* is this widget already in the list */
919 for (i = 0; i < wlist->num_widgets; i++) {
920 if (wlist->widgets[i] == w)
921 return 0;
922 }
923
924 /* allocate some new space */
925 wlistentries = wlist->num_widgets + 1;
926 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
927 wlistentries * sizeof(struct snd_soc_dapm_widget *);
928 *list = krealloc(wlist, wlistsize, GFP_KERNEL);
929 if (*list == NULL) {
930 dev_err(w->dapm->dev, "ASoC: can't allocate widget list for %s\n",
931 w->name);
932 return -ENOMEM;
933 }
934 wlist = *list;
935
936 /* insert the widget */
937 dev_dbg(w->dapm->dev, "ASoC: added %s in widget list pos %d\n",
938 w->name, wlist->num_widgets);
939
940 wlist->widgets[wlist->num_widgets] = w;
941 wlist->num_widgets++;
942 return 1;
943 }
944
945 /*
946 * Recursively check for a completed path to an active or physically connected
947 * output widget. Returns number of complete paths.
948 */
949 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
950 struct snd_soc_dapm_widget_list **list)
951 {
952 struct snd_soc_dapm_path *path;
953 int con = 0;
954
955 if (widget->outputs >= 0)
956 return widget->outputs;
957
958 DAPM_UPDATE_STAT(widget, path_checks);
959
960 switch (widget->id) {
961 case snd_soc_dapm_supply:
962 case snd_soc_dapm_regulator_supply:
963 case snd_soc_dapm_clock_supply:
964 case snd_soc_dapm_kcontrol:
965 return 0;
966 default:
967 break;
968 }
969
970 switch (widget->id) {
971 case snd_soc_dapm_adc:
972 case snd_soc_dapm_aif_out:
973 case snd_soc_dapm_dai_out:
974 if (widget->active) {
975 widget->outputs = snd_soc_dapm_suspend_check(widget);
976 return widget->outputs;
977 }
978 default:
979 break;
980 }
981
982 if (widget->connected) {
983 /* connected pin ? */
984 if (widget->id == snd_soc_dapm_output && !widget->ext) {
985 widget->outputs = snd_soc_dapm_suspend_check(widget);
986 return widget->outputs;
987 }
988
989 /* connected jack or spk ? */
990 if (widget->id == snd_soc_dapm_hp ||
991 widget->id == snd_soc_dapm_spk ||
992 (widget->id == snd_soc_dapm_line &&
993 !list_empty(&widget->sources))) {
994 widget->outputs = snd_soc_dapm_suspend_check(widget);
995 return widget->outputs;
996 }
997 }
998
999 list_for_each_entry(path, &widget->sinks, list_source) {
1000 DAPM_UPDATE_STAT(widget, neighbour_checks);
1001
1002 if (path->weak)
1003 continue;
1004
1005 if (path->walking)
1006 return 1;
1007
1008 if (path->walked)
1009 continue;
1010
1011 trace_snd_soc_dapm_output_path(widget, path);
1012
1013 if (path->sink && path->connect) {
1014 path->walked = 1;
1015 path->walking = 1;
1016
1017 /* do we need to add this widget to the list ? */
1018 if (list) {
1019 int err;
1020 err = dapm_list_add_widget(list, path->sink);
1021 if (err < 0) {
1022 dev_err(widget->dapm->dev,
1023 "ASoC: could not add widget %s\n",
1024 widget->name);
1025 path->walking = 0;
1026 return con;
1027 }
1028 }
1029
1030 con += is_connected_output_ep(path->sink, list);
1031
1032 path->walking = 0;
1033 }
1034 }
1035
1036 widget->outputs = con;
1037
1038 return con;
1039 }
1040
1041 /*
1042 * Recursively check for a completed path to an active or physically connected
1043 * input widget. Returns number of complete paths.
1044 */
1045 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
1046 struct snd_soc_dapm_widget_list **list)
1047 {
1048 struct snd_soc_dapm_path *path;
1049 int con = 0;
1050
1051 if (widget->inputs >= 0)
1052 return widget->inputs;
1053
1054 DAPM_UPDATE_STAT(widget, path_checks);
1055
1056 switch (widget->id) {
1057 case snd_soc_dapm_supply:
1058 case snd_soc_dapm_regulator_supply:
1059 case snd_soc_dapm_clock_supply:
1060 case snd_soc_dapm_kcontrol:
1061 return 0;
1062 default:
1063 break;
1064 }
1065
1066 /* active stream ? */
1067 switch (widget->id) {
1068 case snd_soc_dapm_dac:
1069 case snd_soc_dapm_aif_in:
1070 case snd_soc_dapm_dai_in:
1071 if (widget->active) {
1072 widget->inputs = snd_soc_dapm_suspend_check(widget);
1073 return widget->inputs;
1074 }
1075 default:
1076 break;
1077 }
1078
1079 if (widget->connected) {
1080 /* connected pin ? */
1081 if (widget->id == snd_soc_dapm_input && !widget->ext) {
1082 widget->inputs = snd_soc_dapm_suspend_check(widget);
1083 return widget->inputs;
1084 }
1085
1086 /* connected VMID/Bias for lower pops */
1087 if (widget->id == snd_soc_dapm_vmid) {
1088 widget->inputs = snd_soc_dapm_suspend_check(widget);
1089 return widget->inputs;
1090 }
1091
1092 /* connected jack ? */
1093 if (widget->id == snd_soc_dapm_mic ||
1094 (widget->id == snd_soc_dapm_line &&
1095 !list_empty(&widget->sinks))) {
1096 widget->inputs = snd_soc_dapm_suspend_check(widget);
1097 return widget->inputs;
1098 }
1099
1100 /* signal generator */
1101 if (widget->id == snd_soc_dapm_siggen) {
1102 widget->inputs = snd_soc_dapm_suspend_check(widget);
1103 return widget->inputs;
1104 }
1105 }
1106
1107 list_for_each_entry(path, &widget->sources, list_sink) {
1108 DAPM_UPDATE_STAT(widget, neighbour_checks);
1109
1110 if (path->weak)
1111 continue;
1112
1113 if (path->walking)
1114 return 1;
1115
1116 if (path->walked)
1117 continue;
1118
1119 trace_snd_soc_dapm_input_path(widget, path);
1120
1121 if (path->source && path->connect) {
1122 path->walked = 1;
1123 path->walking = 1;
1124
1125 /* do we need to add this widget to the list ? */
1126 if (list) {
1127 int err;
1128 err = dapm_list_add_widget(list, path->source);
1129 if (err < 0) {
1130 dev_err(widget->dapm->dev,
1131 "ASoC: could not add widget %s\n",
1132 widget->name);
1133 path->walking = 0;
1134 return con;
1135 }
1136 }
1137
1138 con += is_connected_input_ep(path->source, list);
1139
1140 path->walking = 0;
1141 }
1142 }
1143
1144 widget->inputs = con;
1145
1146 return con;
1147 }
1148
1149 /**
1150 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1151 * @dai: the soc DAI.
1152 * @stream: stream direction.
1153 * @list: list of active widgets for this stream.
1154 *
1155 * Queries DAPM graph as to whether an valid audio stream path exists for
1156 * the initial stream specified by name. This takes into account
1157 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1158 *
1159 * Returns the number of valid paths or negative error.
1160 */
1161 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1162 struct snd_soc_dapm_widget_list **list)
1163 {
1164 struct snd_soc_card *card = dai->card;
1165 int paths;
1166
1167 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1168 dapm_reset(card);
1169
1170 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1171 paths = is_connected_output_ep(dai->playback_widget, list);
1172 dapm_clear_walk_output(&card->dapm,
1173 &dai->playback_widget->sinks);
1174 } else {
1175 paths = is_connected_input_ep(dai->capture_widget, list);
1176 dapm_clear_walk_input(&card->dapm,
1177 &dai->capture_widget->sources);
1178 }
1179
1180 trace_snd_soc_dapm_connected(paths, stream);
1181 mutex_unlock(&card->dapm_mutex);
1182
1183 return paths;
1184 }
1185
1186 /*
1187 * Handler for generic register modifier widget.
1188 */
1189 int dapm_reg_event(struct snd_soc_dapm_widget *w,
1190 struct snd_kcontrol *kcontrol, int event)
1191 {
1192 unsigned int val;
1193
1194 if (SND_SOC_DAPM_EVENT_ON(event))
1195 val = w->on_val;
1196 else
1197 val = w->off_val;
1198
1199 soc_widget_update_bits_locked(w, -(w->reg + 1),
1200 w->mask << w->shift, val << w->shift);
1201
1202 return 0;
1203 }
1204 EXPORT_SYMBOL_GPL(dapm_reg_event);
1205
1206 /*
1207 * Handler for regulator supply widget.
1208 */
1209 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1210 struct snd_kcontrol *kcontrol, int event)
1211 {
1212 int ret;
1213
1214 soc_dapm_async_complete(w->dapm);
1215
1216 if (SND_SOC_DAPM_EVENT_ON(event)) {
1217 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1218 ret = regulator_allow_bypass(w->regulator, false);
1219 if (ret != 0)
1220 dev_warn(w->dapm->dev,
1221 "ASoC: Failed to bypass %s: %d\n",
1222 w->name, ret);
1223 }
1224
1225 return regulator_enable(w->regulator);
1226 } else {
1227 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
1228 ret = regulator_allow_bypass(w->regulator, true);
1229 if (ret != 0)
1230 dev_warn(w->dapm->dev,
1231 "ASoC: Failed to unbypass %s: %d\n",
1232 w->name, ret);
1233 }
1234
1235 return regulator_disable_deferred(w->regulator, w->shift);
1236 }
1237 }
1238 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1239
1240 /*
1241 * Handler for clock supply widget.
1242 */
1243 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1244 struct snd_kcontrol *kcontrol, int event)
1245 {
1246 if (!w->clk)
1247 return -EIO;
1248
1249 soc_dapm_async_complete(w->dapm);
1250
1251 #ifdef CONFIG_HAVE_CLK
1252 if (SND_SOC_DAPM_EVENT_ON(event)) {
1253 return clk_prepare_enable(w->clk);
1254 } else {
1255 clk_disable_unprepare(w->clk);
1256 return 0;
1257 }
1258 #endif
1259 return 0;
1260 }
1261 EXPORT_SYMBOL_GPL(dapm_clock_event);
1262
1263 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1264 {
1265 if (w->power_checked)
1266 return w->new_power;
1267
1268 if (w->force)
1269 w->new_power = 1;
1270 else
1271 w->new_power = w->power_check(w);
1272
1273 w->power_checked = true;
1274
1275 return w->new_power;
1276 }
1277
1278 /* Generic check to see if a widget should be powered.
1279 */
1280 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1281 {
1282 int in, out;
1283
1284 DAPM_UPDATE_STAT(w, power_checks);
1285
1286 in = is_connected_input_ep(w, NULL);
1287 dapm_clear_walk_input(w->dapm, &w->sources);
1288 out = is_connected_output_ep(w, NULL);
1289 dapm_clear_walk_output(w->dapm, &w->sinks);
1290 return out != 0 && in != 0;
1291 }
1292
1293 /* Check to see if an ADC has power */
1294 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
1295 {
1296 int in;
1297
1298 DAPM_UPDATE_STAT(w, power_checks);
1299
1300 if (w->active) {
1301 in = is_connected_input_ep(w, NULL);
1302 dapm_clear_walk_input(w->dapm, &w->sources);
1303 return in != 0;
1304 } else {
1305 return dapm_generic_check_power(w);
1306 }
1307 }
1308
1309 /* Check to see if a DAC has power */
1310 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
1311 {
1312 int out;
1313
1314 DAPM_UPDATE_STAT(w, power_checks);
1315
1316 if (w->active) {
1317 out = is_connected_output_ep(w, NULL);
1318 dapm_clear_walk_output(w->dapm, &w->sinks);
1319 return out != 0;
1320 } else {
1321 return dapm_generic_check_power(w);
1322 }
1323 }
1324
1325 /* Check to see if a power supply is needed */
1326 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1327 {
1328 struct snd_soc_dapm_path *path;
1329
1330 DAPM_UPDATE_STAT(w, power_checks);
1331
1332 /* Check if one of our outputs is connected */
1333 list_for_each_entry(path, &w->sinks, list_source) {
1334 DAPM_UPDATE_STAT(w, neighbour_checks);
1335
1336 if (path->weak)
1337 continue;
1338
1339 if (path->connected &&
1340 !path->connected(path->source, path->sink))
1341 continue;
1342
1343 if (!path->sink)
1344 continue;
1345
1346 if (dapm_widget_power_check(path->sink))
1347 return 1;
1348 }
1349
1350 return 0;
1351 }
1352
1353 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1354 {
1355 return 1;
1356 }
1357
1358 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1359 struct snd_soc_dapm_widget *b,
1360 bool power_up)
1361 {
1362 int *sort;
1363
1364 if (power_up)
1365 sort = dapm_up_seq;
1366 else
1367 sort = dapm_down_seq;
1368
1369 if (sort[a->id] != sort[b->id])
1370 return sort[a->id] - sort[b->id];
1371 if (a->subseq != b->subseq) {
1372 if (power_up)
1373 return a->subseq - b->subseq;
1374 else
1375 return b->subseq - a->subseq;
1376 }
1377 if (a->reg != b->reg)
1378 return a->reg - b->reg;
1379 if (a->dapm != b->dapm)
1380 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1381
1382 return 0;
1383 }
1384
1385 /* Insert a widget in order into a DAPM power sequence. */
1386 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1387 struct list_head *list,
1388 bool power_up)
1389 {
1390 struct snd_soc_dapm_widget *w;
1391
1392 list_for_each_entry(w, list, power_list)
1393 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1394 list_add_tail(&new_widget->power_list, &w->power_list);
1395 return;
1396 }
1397
1398 list_add_tail(&new_widget->power_list, list);
1399 }
1400
1401 static void dapm_seq_check_event(struct snd_soc_card *card,
1402 struct snd_soc_dapm_widget *w, int event)
1403 {
1404 const char *ev_name;
1405 int power, ret;
1406
1407 switch (event) {
1408 case SND_SOC_DAPM_PRE_PMU:
1409 ev_name = "PRE_PMU";
1410 power = 1;
1411 break;
1412 case SND_SOC_DAPM_POST_PMU:
1413 ev_name = "POST_PMU";
1414 power = 1;
1415 break;
1416 case SND_SOC_DAPM_PRE_PMD:
1417 ev_name = "PRE_PMD";
1418 power = 0;
1419 break;
1420 case SND_SOC_DAPM_POST_PMD:
1421 ev_name = "POST_PMD";
1422 power = 0;
1423 break;
1424 case SND_SOC_DAPM_WILL_PMU:
1425 ev_name = "WILL_PMU";
1426 power = 1;
1427 break;
1428 case SND_SOC_DAPM_WILL_PMD:
1429 ev_name = "WILL_PMD";
1430 power = 0;
1431 break;
1432 default:
1433 WARN(1, "Unknown event %d\n", event);
1434 return;
1435 }
1436
1437 if (w->new_power != power)
1438 return;
1439
1440 if (w->event && (w->event_flags & event)) {
1441 pop_dbg(w->dapm->dev, card->pop_time, "pop test : %s %s\n",
1442 w->name, ev_name);
1443 soc_dapm_async_complete(w->dapm);
1444 trace_snd_soc_dapm_widget_event_start(w, event);
1445 ret = w->event(w, NULL, event);
1446 trace_snd_soc_dapm_widget_event_done(w, event);
1447 if (ret < 0)
1448 dev_err(w->dapm->dev, "ASoC: %s: %s event failed: %d\n",
1449 ev_name, w->name, ret);
1450 }
1451 }
1452
1453 /* Apply the coalesced changes from a DAPM sequence */
1454 static void dapm_seq_run_coalesced(struct snd_soc_card *card,
1455 struct list_head *pending)
1456 {
1457 struct snd_soc_dapm_widget *w;
1458 int reg;
1459 unsigned int value = 0;
1460 unsigned int mask = 0;
1461
1462 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1463 power_list)->reg;
1464
1465 list_for_each_entry(w, pending, power_list) {
1466 WARN_ON(reg != w->reg);
1467 w->power = w->new_power;
1468
1469 mask |= w->mask << w->shift;
1470 if (w->power)
1471 value |= w->on_val << w->shift;
1472 else
1473 value |= w->off_val << w->shift;
1474
1475 pop_dbg(w->dapm->dev, card->pop_time,
1476 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1477 w->name, reg, value, mask);
1478
1479 /* Check for events */
1480 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMU);
1481 dapm_seq_check_event(card, w, SND_SOC_DAPM_PRE_PMD);
1482 }
1483
1484 if (reg >= 0) {
1485 /* Any widget will do, they should all be updating the
1486 * same register.
1487 */
1488 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1489 power_list);
1490
1491 pop_dbg(w->dapm->dev, card->pop_time,
1492 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1493 value, mask, reg, card->pop_time);
1494 pop_wait(card->pop_time);
1495 soc_widget_update_bits_locked(w, reg, mask, value);
1496 }
1497
1498 list_for_each_entry(w, pending, power_list) {
1499 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMU);
1500 dapm_seq_check_event(card, w, SND_SOC_DAPM_POST_PMD);
1501 }
1502 }
1503
1504 /* Apply a DAPM power sequence.
1505 *
1506 * We walk over a pre-sorted list of widgets to apply power to. In
1507 * order to minimise the number of writes to the device required
1508 * multiple widgets will be updated in a single write where possible.
1509 * Currently anything that requires more than a single write is not
1510 * handled.
1511 */
1512 static void dapm_seq_run(struct snd_soc_card *card,
1513 struct list_head *list, int event, bool power_up)
1514 {
1515 struct snd_soc_dapm_widget *w, *n;
1516 struct snd_soc_dapm_context *d;
1517 LIST_HEAD(pending);
1518 int cur_sort = -1;
1519 int cur_subseq = -1;
1520 int cur_reg = SND_SOC_NOPM;
1521 struct snd_soc_dapm_context *cur_dapm = NULL;
1522 int ret, i;
1523 int *sort;
1524
1525 if (power_up)
1526 sort = dapm_up_seq;
1527 else
1528 sort = dapm_down_seq;
1529
1530 list_for_each_entry_safe(w, n, list, power_list) {
1531 ret = 0;
1532
1533 /* Do we need to apply any queued changes? */
1534 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1535 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1536 if (!list_empty(&pending))
1537 dapm_seq_run_coalesced(card, &pending);
1538
1539 if (cur_dapm && cur_dapm->seq_notifier) {
1540 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1541 if (sort[i] == cur_sort)
1542 cur_dapm->seq_notifier(cur_dapm,
1543 i,
1544 cur_subseq);
1545 }
1546
1547 if (cur_dapm && w->dapm != cur_dapm)
1548 soc_dapm_async_complete(cur_dapm);
1549
1550 INIT_LIST_HEAD(&pending);
1551 cur_sort = -1;
1552 cur_subseq = INT_MIN;
1553 cur_reg = SND_SOC_NOPM;
1554 cur_dapm = NULL;
1555 }
1556
1557 switch (w->id) {
1558 case snd_soc_dapm_pre:
1559 if (!w->event)
1560 list_for_each_entry_safe_continue(w, n, list,
1561 power_list);
1562
1563 if (event == SND_SOC_DAPM_STREAM_START)
1564 ret = w->event(w,
1565 NULL, SND_SOC_DAPM_PRE_PMU);
1566 else if (event == SND_SOC_DAPM_STREAM_STOP)
1567 ret = w->event(w,
1568 NULL, SND_SOC_DAPM_PRE_PMD);
1569 break;
1570
1571 case snd_soc_dapm_post:
1572 if (!w->event)
1573 list_for_each_entry_safe_continue(w, n, list,
1574 power_list);
1575
1576 if (event == SND_SOC_DAPM_STREAM_START)
1577 ret = w->event(w,
1578 NULL, SND_SOC_DAPM_POST_PMU);
1579 else if (event == SND_SOC_DAPM_STREAM_STOP)
1580 ret = w->event(w,
1581 NULL, SND_SOC_DAPM_POST_PMD);
1582 break;
1583
1584 default:
1585 /* Queue it up for application */
1586 cur_sort = sort[w->id];
1587 cur_subseq = w->subseq;
1588 cur_reg = w->reg;
1589 cur_dapm = w->dapm;
1590 list_move(&w->power_list, &pending);
1591 break;
1592 }
1593
1594 if (ret < 0)
1595 dev_err(w->dapm->dev,
1596 "ASoC: Failed to apply widget power: %d\n", ret);
1597 }
1598
1599 if (!list_empty(&pending))
1600 dapm_seq_run_coalesced(card, &pending);
1601
1602 if (cur_dapm && cur_dapm->seq_notifier) {
1603 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1604 if (sort[i] == cur_sort)
1605 cur_dapm->seq_notifier(cur_dapm,
1606 i, cur_subseq);
1607 }
1608
1609 list_for_each_entry(d, &card->dapm_list, list) {
1610 soc_dapm_async_complete(d);
1611 }
1612 }
1613
1614 static void dapm_widget_update(struct snd_soc_card *card)
1615 {
1616 struct snd_soc_dapm_update *update = card->update;
1617 struct snd_soc_dapm_widget_list *wlist;
1618 struct snd_soc_dapm_widget *w = NULL;
1619 unsigned int wi;
1620 int ret;
1621
1622 if (!update || !dapm_kcontrol_is_powered(update->kcontrol))
1623 return;
1624
1625 wlist = dapm_kcontrol_get_wlist(update->kcontrol);
1626
1627 for (wi = 0; wi < wlist->num_widgets; wi++) {
1628 w = wlist->widgets[wi];
1629
1630 if (w->event && (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1631 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1632 if (ret != 0)
1633 dev_err(w->dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
1634 w->name, ret);
1635 }
1636 }
1637
1638 if (!w)
1639 return;
1640
1641 ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
1642 update->val);
1643 if (ret < 0)
1644 dev_err(w->dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1645 w->name, ret);
1646
1647 for (wi = 0; wi < wlist->num_widgets; wi++) {
1648 w = wlist->widgets[wi];
1649
1650 if (w->event && (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1651 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1652 if (ret != 0)
1653 dev_err(w->dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
1654 w->name, ret);
1655 }
1656 }
1657 }
1658
1659 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1660 * they're changing state.
1661 */
1662 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1663 {
1664 struct snd_soc_dapm_context *d = data;
1665 int ret;
1666
1667 /* If we're off and we're not supposed to be go into STANDBY */
1668 if (d->bias_level == SND_SOC_BIAS_OFF &&
1669 d->target_bias_level != SND_SOC_BIAS_OFF) {
1670 if (d->dev)
1671 pm_runtime_get_sync(d->dev);
1672
1673 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1674 if (ret != 0)
1675 dev_err(d->dev,
1676 "ASoC: Failed to turn on bias: %d\n", ret);
1677 }
1678
1679 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1680 if (d->bias_level != d->target_bias_level) {
1681 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1682 if (ret != 0)
1683 dev_err(d->dev,
1684 "ASoC: Failed to prepare bias: %d\n", ret);
1685 }
1686 }
1687
1688 /* Async callback run prior to DAPM sequences - brings to their final
1689 * state.
1690 */
1691 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1692 {
1693 struct snd_soc_dapm_context *d = data;
1694 int ret;
1695
1696 /* If we just powered the last thing off drop to standby bias */
1697 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1698 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1699 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1700 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1701 if (ret != 0)
1702 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
1703 ret);
1704 }
1705
1706 /* If we're in standby and can support bias off then do that */
1707 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1708 d->target_bias_level == SND_SOC_BIAS_OFF) {
1709 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1710 if (ret != 0)
1711 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1712 ret);
1713
1714 if (d->dev)
1715 pm_runtime_put(d->dev);
1716 }
1717
1718 /* If we just powered up then move to active bias */
1719 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1720 d->target_bias_level == SND_SOC_BIAS_ON) {
1721 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1722 if (ret != 0)
1723 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
1724 ret);
1725 }
1726 }
1727
1728 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1729 bool power, bool connect)
1730 {
1731 /* If a connection is being made or broken then that update
1732 * will have marked the peer dirty, otherwise the widgets are
1733 * not connected and this update has no impact. */
1734 if (!connect)
1735 return;
1736
1737 /* If the peer is already in the state we're moving to then we
1738 * won't have an impact on it. */
1739 if (power != peer->power)
1740 dapm_mark_dirty(peer, "peer state change");
1741 }
1742
1743 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1744 struct list_head *up_list,
1745 struct list_head *down_list)
1746 {
1747 struct snd_soc_dapm_path *path;
1748
1749 if (w->power == power)
1750 return;
1751
1752 trace_snd_soc_dapm_widget_power(w, power);
1753
1754 /* If we changed our power state perhaps our neigbours changed
1755 * also.
1756 */
1757 list_for_each_entry(path, &w->sources, list_sink) {
1758 if (path->source) {
1759 dapm_widget_set_peer_power(path->source, power,
1760 path->connect);
1761 }
1762 }
1763 switch (w->id) {
1764 case snd_soc_dapm_supply:
1765 case snd_soc_dapm_regulator_supply:
1766 case snd_soc_dapm_clock_supply:
1767 case snd_soc_dapm_kcontrol:
1768 /* Supplies can't affect their outputs, only their inputs */
1769 break;
1770 default:
1771 list_for_each_entry(path, &w->sinks, list_source) {
1772 if (path->sink) {
1773 dapm_widget_set_peer_power(path->sink, power,
1774 path->connect);
1775 }
1776 }
1777 break;
1778 }
1779
1780 if (power)
1781 dapm_seq_insert(w, up_list, true);
1782 else
1783 dapm_seq_insert(w, down_list, false);
1784 }
1785
1786 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1787 struct list_head *up_list,
1788 struct list_head *down_list)
1789 {
1790 int power;
1791
1792 switch (w->id) {
1793 case snd_soc_dapm_pre:
1794 dapm_seq_insert(w, down_list, false);
1795 break;
1796 case snd_soc_dapm_post:
1797 dapm_seq_insert(w, up_list, true);
1798 break;
1799
1800 default:
1801 power = dapm_widget_power_check(w);
1802
1803 dapm_widget_set_power(w, power, up_list, down_list);
1804 break;
1805 }
1806 }
1807
1808 /*
1809 * Scan each dapm widget for complete audio path.
1810 * A complete path is a route that has valid endpoints i.e.:-
1811 *
1812 * o DAC to output pin.
1813 * o Input Pin to ADC.
1814 * o Input pin to Output pin (bypass, sidetone)
1815 * o DAC to ADC (loopback).
1816 */
1817 static int dapm_power_widgets(struct snd_soc_card *card, int event)
1818 {
1819 struct snd_soc_dapm_widget *w;
1820 struct snd_soc_dapm_context *d;
1821 LIST_HEAD(up_list);
1822 LIST_HEAD(down_list);
1823 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1824 enum snd_soc_bias_level bias;
1825
1826 trace_snd_soc_dapm_start(card);
1827
1828 list_for_each_entry(d, &card->dapm_list, list) {
1829 if (d->idle_bias_off)
1830 d->target_bias_level = SND_SOC_BIAS_OFF;
1831 else
1832 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1833 }
1834
1835 dapm_reset(card);
1836
1837 /* Check which widgets we need to power and store them in
1838 * lists indicating if they should be powered up or down. We
1839 * only check widgets that have been flagged as dirty but note
1840 * that new widgets may be added to the dirty list while we
1841 * iterate.
1842 */
1843 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1844 dapm_power_one_widget(w, &up_list, &down_list);
1845 }
1846
1847 list_for_each_entry(w, &card->widgets, list) {
1848 switch (w->id) {
1849 case snd_soc_dapm_pre:
1850 case snd_soc_dapm_post:
1851 /* These widgets always need to be powered */
1852 break;
1853 default:
1854 list_del_init(&w->dirty);
1855 break;
1856 }
1857
1858 if (w->new_power) {
1859 d = w->dapm;
1860
1861 /* Supplies and micbiases only bring the
1862 * context up to STANDBY as unless something
1863 * else is active and passing audio they
1864 * generally don't require full power. Signal
1865 * generators are virtual pins and have no
1866 * power impact themselves.
1867 */
1868 switch (w->id) {
1869 case snd_soc_dapm_siggen:
1870 case snd_soc_dapm_vmid:
1871 break;
1872 case snd_soc_dapm_supply:
1873 case snd_soc_dapm_regulator_supply:
1874 case snd_soc_dapm_clock_supply:
1875 case snd_soc_dapm_micbias:
1876 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1877 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1878 break;
1879 default:
1880 d->target_bias_level = SND_SOC_BIAS_ON;
1881 break;
1882 }
1883 }
1884
1885 }
1886
1887 /* Force all contexts in the card to the same bias state if
1888 * they're not ground referenced.
1889 */
1890 bias = SND_SOC_BIAS_OFF;
1891 list_for_each_entry(d, &card->dapm_list, list)
1892 if (d->target_bias_level > bias)
1893 bias = d->target_bias_level;
1894 list_for_each_entry(d, &card->dapm_list, list)
1895 if (!d->idle_bias_off)
1896 d->target_bias_level = bias;
1897
1898 trace_snd_soc_dapm_walk_done(card);
1899
1900 /* Run all the bias changes in parallel */
1901 list_for_each_entry(d, &card->dapm_list, list)
1902 async_schedule_domain(dapm_pre_sequence_async, d,
1903 &async_domain);
1904 async_synchronize_full_domain(&async_domain);
1905
1906 list_for_each_entry(w, &down_list, power_list) {
1907 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMD);
1908 }
1909
1910 list_for_each_entry(w, &up_list, power_list) {
1911 dapm_seq_check_event(card, w, SND_SOC_DAPM_WILL_PMU);
1912 }
1913
1914 /* Power down widgets first; try to avoid amplifying pops. */
1915 dapm_seq_run(card, &down_list, event, false);
1916
1917 dapm_widget_update(card);
1918
1919 /* Now power up. */
1920 dapm_seq_run(card, &up_list, event, true);
1921
1922 /* Run all the bias changes in parallel */
1923 list_for_each_entry(d, &card->dapm_list, list)
1924 async_schedule_domain(dapm_post_sequence_async, d,
1925 &async_domain);
1926 async_synchronize_full_domain(&async_domain);
1927
1928 /* do we need to notify any clients that DAPM event is complete */
1929 list_for_each_entry(d, &card->dapm_list, list) {
1930 if (d->stream_event)
1931 d->stream_event(d, event);
1932 }
1933
1934 pop_dbg(card->dev, card->pop_time,
1935 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1936 pop_wait(card->pop_time);
1937
1938 trace_snd_soc_dapm_done(card);
1939
1940 return 0;
1941 }
1942
1943 #ifdef CONFIG_DEBUG_FS
1944 static ssize_t dapm_widget_power_read_file(struct file *file,
1945 char __user *user_buf,
1946 size_t count, loff_t *ppos)
1947 {
1948 struct snd_soc_dapm_widget *w = file->private_data;
1949 char *buf;
1950 int in, out;
1951 ssize_t ret;
1952 struct snd_soc_dapm_path *p = NULL;
1953
1954 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1955 if (!buf)
1956 return -ENOMEM;
1957
1958 in = is_connected_input_ep(w, NULL);
1959 dapm_clear_walk_input(w->dapm, &w->sources);
1960 out = is_connected_output_ep(w, NULL);
1961 dapm_clear_walk_output(w->dapm, &w->sinks);
1962
1963 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1964 w->name, w->power ? "On" : "Off",
1965 w->force ? " (forced)" : "", in, out);
1966
1967 if (w->reg >= 0)
1968 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1969 " - R%d(0x%x) mask 0x%x",
1970 w->reg, w->reg, w->mask << w->shift);
1971
1972 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1973
1974 if (w->sname)
1975 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1976 w->sname,
1977 w->active ? "active" : "inactive");
1978
1979 list_for_each_entry(p, &w->sources, list_sink) {
1980 if (p->connected && !p->connected(w, p->source))
1981 continue;
1982
1983 if (p->connect)
1984 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1985 " in \"%s\" \"%s\"\n",
1986 p->name ? p->name : "static",
1987 p->source->name);
1988 }
1989 list_for_each_entry(p, &w->sinks, list_source) {
1990 if (p->connected && !p->connected(w, p->sink))
1991 continue;
1992
1993 if (p->connect)
1994 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1995 " out \"%s\" \"%s\"\n",
1996 p->name ? p->name : "static",
1997 p->sink->name);
1998 }
1999
2000 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
2001
2002 kfree(buf);
2003 return ret;
2004 }
2005
2006 static const struct file_operations dapm_widget_power_fops = {
2007 .open = simple_open,
2008 .read = dapm_widget_power_read_file,
2009 .llseek = default_llseek,
2010 };
2011
2012 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
2013 size_t count, loff_t *ppos)
2014 {
2015 struct snd_soc_dapm_context *dapm = file->private_data;
2016 char *level;
2017
2018 switch (dapm->bias_level) {
2019 case SND_SOC_BIAS_ON:
2020 level = "On\n";
2021 break;
2022 case SND_SOC_BIAS_PREPARE:
2023 level = "Prepare\n";
2024 break;
2025 case SND_SOC_BIAS_STANDBY:
2026 level = "Standby\n";
2027 break;
2028 case SND_SOC_BIAS_OFF:
2029 level = "Off\n";
2030 break;
2031 default:
2032 WARN(1, "Unknown bias_level %d\n", dapm->bias_level);
2033 level = "Unknown\n";
2034 break;
2035 }
2036
2037 return simple_read_from_buffer(user_buf, count, ppos, level,
2038 strlen(level));
2039 }
2040
2041 static const struct file_operations dapm_bias_fops = {
2042 .open = simple_open,
2043 .read = dapm_bias_read_file,
2044 .llseek = default_llseek,
2045 };
2046
2047 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2048 struct dentry *parent)
2049 {
2050 struct dentry *d;
2051
2052 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
2053
2054 if (!dapm->debugfs_dapm) {
2055 dev_warn(dapm->dev,
2056 "ASoC: Failed to create DAPM debugfs directory\n");
2057 return;
2058 }
2059
2060 d = debugfs_create_file("bias_level", 0444,
2061 dapm->debugfs_dapm, dapm,
2062 &dapm_bias_fops);
2063 if (!d)
2064 dev_warn(dapm->dev,
2065 "ASoC: Failed to create bias level debugfs file\n");
2066 }
2067
2068 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2069 {
2070 struct snd_soc_dapm_context *dapm = w->dapm;
2071 struct dentry *d;
2072
2073 if (!dapm->debugfs_dapm || !w->name)
2074 return;
2075
2076 d = debugfs_create_file(w->name, 0444,
2077 dapm->debugfs_dapm, w,
2078 &dapm_widget_power_fops);
2079 if (!d)
2080 dev_warn(w->dapm->dev,
2081 "ASoC: Failed to create %s debugfs file\n",
2082 w->name);
2083 }
2084
2085 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2086 {
2087 debugfs_remove_recursive(dapm->debugfs_dapm);
2088 }
2089
2090 #else
2091 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
2092 struct dentry *parent)
2093 {
2094 }
2095
2096 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
2097 {
2098 }
2099
2100 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
2101 {
2102 }
2103
2104 #endif
2105
2106 /* test and update the power status of a mux widget */
2107 static int soc_dapm_mux_update_power(struct snd_soc_card *card,
2108 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2109 {
2110 struct snd_soc_dapm_path *path;
2111 int found = 0;
2112
2113 /* find dapm widget path assoc with kcontrol */
2114 dapm_kcontrol_for_each_path(path, kcontrol) {
2115 if (!path->name || !e->texts[mux])
2116 continue;
2117
2118 found = 1;
2119 /* we now need to match the string in the enum to the path */
2120 if (!(strcmp(path->name, e->texts[mux]))) {
2121 path->connect = 1; /* new connection */
2122 dapm_mark_dirty(path->source, "mux connection");
2123 } else {
2124 if (path->connect)
2125 dapm_mark_dirty(path->source,
2126 "mux disconnection");
2127 path->connect = 0; /* old connection must be powered down */
2128 }
2129 dapm_mark_dirty(path->sink, "mux change");
2130 }
2131
2132 if (found)
2133 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2134
2135 return found;
2136 }
2137
2138 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
2139 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e,
2140 struct snd_soc_dapm_update *update)
2141 {
2142 struct snd_soc_card *card = dapm->card;
2143 int ret;
2144
2145 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2146 card->update = update;
2147 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2148 card->update = NULL;
2149 mutex_unlock(&card->dapm_mutex);
2150 if (ret > 0)
2151 soc_dpcm_runtime_update(card);
2152 return ret;
2153 }
2154 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2155
2156 /* test and update the power status of a mixer or switch widget */
2157 static int soc_dapm_mixer_update_power(struct snd_soc_card *card,
2158 struct snd_kcontrol *kcontrol, int connect)
2159 {
2160 struct snd_soc_dapm_path *path;
2161 int found = 0;
2162
2163 /* find dapm widget path assoc with kcontrol */
2164 dapm_kcontrol_for_each_path(path, kcontrol) {
2165 found = 1;
2166 path->connect = connect;
2167 dapm_mark_dirty(path->source, "mixer connection");
2168 dapm_mark_dirty(path->sink, "mixer update");
2169 }
2170
2171 if (found)
2172 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2173
2174 return found;
2175 }
2176
2177 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_context *dapm,
2178 struct snd_kcontrol *kcontrol, int connect,
2179 struct snd_soc_dapm_update *update)
2180 {
2181 struct snd_soc_card *card = dapm->card;
2182 int ret;
2183
2184 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2185 card->update = update;
2186 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2187 card->update = NULL;
2188 mutex_unlock(&card->dapm_mutex);
2189 if (ret > 0)
2190 soc_dpcm_runtime_update(card);
2191 return ret;
2192 }
2193 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2194
2195 /* show dapm widget status in sys fs */
2196 static ssize_t dapm_widget_show(struct device *dev,
2197 struct device_attribute *attr, char *buf)
2198 {
2199 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
2200 struct snd_soc_codec *codec =rtd->codec;
2201 struct snd_soc_dapm_widget *w;
2202 int count = 0;
2203 char *state = "not set";
2204
2205 list_for_each_entry(w, &codec->card->widgets, list) {
2206 if (w->dapm != &codec->dapm)
2207 continue;
2208
2209 /* only display widgets that burnm power */
2210 switch (w->id) {
2211 case snd_soc_dapm_hp:
2212 case snd_soc_dapm_mic:
2213 case snd_soc_dapm_spk:
2214 case snd_soc_dapm_line:
2215 case snd_soc_dapm_micbias:
2216 case snd_soc_dapm_dac:
2217 case snd_soc_dapm_adc:
2218 case snd_soc_dapm_pga:
2219 case snd_soc_dapm_out_drv:
2220 case snd_soc_dapm_mixer:
2221 case snd_soc_dapm_mixer_named_ctl:
2222 case snd_soc_dapm_supply:
2223 case snd_soc_dapm_regulator_supply:
2224 case snd_soc_dapm_clock_supply:
2225 if (w->name)
2226 count += sprintf(buf + count, "%s: %s\n",
2227 w->name, w->power ? "On":"Off");
2228 break;
2229 default:
2230 break;
2231 }
2232 }
2233
2234 switch (codec->dapm.bias_level) {
2235 case SND_SOC_BIAS_ON:
2236 state = "On";
2237 break;
2238 case SND_SOC_BIAS_PREPARE:
2239 state = "Prepare";
2240 break;
2241 case SND_SOC_BIAS_STANDBY:
2242 state = "Standby";
2243 break;
2244 case SND_SOC_BIAS_OFF:
2245 state = "Off";
2246 break;
2247 }
2248 count += sprintf(buf + count, "PM State: %s\n", state);
2249
2250 return count;
2251 }
2252
2253 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2254
2255 int snd_soc_dapm_sys_add(struct device *dev)
2256 {
2257 return device_create_file(dev, &dev_attr_dapm_widget);
2258 }
2259
2260 static void snd_soc_dapm_sys_remove(struct device *dev)
2261 {
2262 device_remove_file(dev, &dev_attr_dapm_widget);
2263 }
2264
2265 static void dapm_free_path(struct snd_soc_dapm_path *path)
2266 {
2267 list_del(&path->list_sink);
2268 list_del(&path->list_source);
2269 list_del(&path->list_kcontrol);
2270 list_del(&path->list);
2271 kfree(path);
2272 }
2273
2274 /* free all dapm widgets and resources */
2275 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2276 {
2277 struct snd_soc_dapm_widget *w, *next_w;
2278 struct snd_soc_dapm_path *p, *next_p;
2279
2280 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2281 if (w->dapm != dapm)
2282 continue;
2283 list_del(&w->list);
2284 /*
2285 * remove source and sink paths associated to this widget.
2286 * While removing the path, remove reference to it from both
2287 * source and sink widgets so that path is removed only once.
2288 */
2289 list_for_each_entry_safe(p, next_p, &w->sources, list_sink)
2290 dapm_free_path(p);
2291
2292 list_for_each_entry_safe(p, next_p, &w->sinks, list_source)
2293 dapm_free_path(p);
2294
2295 kfree(w->kcontrols);
2296 kfree(w->name);
2297 kfree(w);
2298 }
2299 }
2300
2301 static struct snd_soc_dapm_widget *dapm_find_widget(
2302 struct snd_soc_dapm_context *dapm, const char *pin,
2303 bool search_other_contexts)
2304 {
2305 struct snd_soc_dapm_widget *w;
2306 struct snd_soc_dapm_widget *fallback = NULL;
2307
2308 list_for_each_entry(w, &dapm->card->widgets, list) {
2309 if (!strcmp(w->name, pin)) {
2310 if (w->dapm == dapm)
2311 return w;
2312 else
2313 fallback = w;
2314 }
2315 }
2316
2317 if (search_other_contexts)
2318 return fallback;
2319
2320 return NULL;
2321 }
2322
2323 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2324 const char *pin, int status)
2325 {
2326 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2327
2328 if (!w) {
2329 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
2330 return -EINVAL;
2331 }
2332
2333 if (w->connected != status)
2334 dapm_mark_dirty(w, "pin configuration");
2335
2336 w->connected = status;
2337 if (status == 0)
2338 w->force = 0;
2339
2340 return 0;
2341 }
2342
2343 /**
2344 * snd_soc_dapm_sync - scan and power dapm paths
2345 * @dapm: DAPM context
2346 *
2347 * Walks all dapm audio paths and powers widgets according to their
2348 * stream or path usage.
2349 *
2350 * Returns 0 for success.
2351 */
2352 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2353 {
2354 int ret;
2355
2356 /*
2357 * Suppress early reports (eg, jacks syncing their state) to avoid
2358 * silly DAPM runs during card startup.
2359 */
2360 if (!dapm->card || !dapm->card->instantiated)
2361 return 0;
2362
2363 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2364 ret = dapm_power_widgets(dapm->card, SND_SOC_DAPM_STREAM_NOP);
2365 mutex_unlock(&dapm->card->dapm_mutex);
2366 return ret;
2367 }
2368 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2369
2370 static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
2371 struct snd_soc_dapm_widget *wsource, struct snd_soc_dapm_widget *wsink,
2372 const char *control,
2373 int (*connected)(struct snd_soc_dapm_widget *source,
2374 struct snd_soc_dapm_widget *sink))
2375 {
2376 struct snd_soc_dapm_path *path;
2377 int ret;
2378
2379 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2380 if (!path)
2381 return -ENOMEM;
2382
2383 path->source = wsource;
2384 path->sink = wsink;
2385 path->connected = connected;
2386 INIT_LIST_HEAD(&path->list);
2387 INIT_LIST_HEAD(&path->list_kcontrol);
2388 INIT_LIST_HEAD(&path->list_source);
2389 INIT_LIST_HEAD(&path->list_sink);
2390
2391 /* check for external widgets */
2392 if (wsink->id == snd_soc_dapm_input) {
2393 if (wsource->id == snd_soc_dapm_micbias ||
2394 wsource->id == snd_soc_dapm_mic ||
2395 wsource->id == snd_soc_dapm_line ||
2396 wsource->id == snd_soc_dapm_output)
2397 wsink->ext = 1;
2398 }
2399 if (wsource->id == snd_soc_dapm_output) {
2400 if (wsink->id == snd_soc_dapm_spk ||
2401 wsink->id == snd_soc_dapm_hp ||
2402 wsink->id == snd_soc_dapm_line ||
2403 wsink->id == snd_soc_dapm_input)
2404 wsource->ext = 1;
2405 }
2406
2407 dapm_mark_dirty(wsource, "Route added");
2408 dapm_mark_dirty(wsink, "Route added");
2409
2410 /* connect static paths */
2411 if (control == NULL) {
2412 list_add(&path->list, &dapm->card->paths);
2413 list_add(&path->list_sink, &wsink->sources);
2414 list_add(&path->list_source, &wsource->sinks);
2415 path->connect = 1;
2416 return 0;
2417 }
2418
2419 /* connect dynamic paths */
2420 switch (wsink->id) {
2421 case snd_soc_dapm_adc:
2422 case snd_soc_dapm_dac:
2423 case snd_soc_dapm_pga:
2424 case snd_soc_dapm_out_drv:
2425 case snd_soc_dapm_input:
2426 case snd_soc_dapm_output:
2427 case snd_soc_dapm_siggen:
2428 case snd_soc_dapm_micbias:
2429 case snd_soc_dapm_vmid:
2430 case snd_soc_dapm_pre:
2431 case snd_soc_dapm_post:
2432 case snd_soc_dapm_supply:
2433 case snd_soc_dapm_regulator_supply:
2434 case snd_soc_dapm_clock_supply:
2435 case snd_soc_dapm_aif_in:
2436 case snd_soc_dapm_aif_out:
2437 case snd_soc_dapm_dai_in:
2438 case snd_soc_dapm_dai_out:
2439 case snd_soc_dapm_dai_link:
2440 case snd_soc_dapm_kcontrol:
2441 list_add(&path->list, &dapm->card->paths);
2442 list_add(&path->list_sink, &wsink->sources);
2443 list_add(&path->list_source, &wsource->sinks);
2444 path->connect = 1;
2445 return 0;
2446 case snd_soc_dapm_mux:
2447 case snd_soc_dapm_virt_mux:
2448 case snd_soc_dapm_value_mux:
2449 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2450 &wsink->kcontrol_news[0]);
2451 if (ret != 0)
2452 goto err;
2453 break;
2454 case snd_soc_dapm_switch:
2455 case snd_soc_dapm_mixer:
2456 case snd_soc_dapm_mixer_named_ctl:
2457 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2458 if (ret != 0)
2459 goto err;
2460 break;
2461 case snd_soc_dapm_hp:
2462 case snd_soc_dapm_mic:
2463 case snd_soc_dapm_line:
2464 case snd_soc_dapm_spk:
2465 list_add(&path->list, &dapm->card->paths);
2466 list_add(&path->list_sink, &wsink->sources);
2467 list_add(&path->list_source, &wsource->sinks);
2468 path->connect = 0;
2469 return 0;
2470 }
2471
2472 return 0;
2473 err:
2474 kfree(path);
2475 return ret;
2476 }
2477
2478 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2479 const struct snd_soc_dapm_route *route,
2480 unsigned int is_prefixed)
2481 {
2482 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2483 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2484 const char *sink;
2485 const char *source;
2486 char prefixed_sink[80];
2487 char prefixed_source[80];
2488 int ret;
2489
2490 if (dapm->codec && dapm->codec->name_prefix && !is_prefixed) {
2491 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2492 dapm->codec->name_prefix, route->sink);
2493 sink = prefixed_sink;
2494 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2495 dapm->codec->name_prefix, route->source);
2496 source = prefixed_source;
2497 } else {
2498 sink = route->sink;
2499 source = route->source;
2500 }
2501
2502 /*
2503 * find src and dest widgets over all widgets but favor a widget from
2504 * current DAPM context
2505 */
2506 list_for_each_entry(w, &dapm->card->widgets, list) {
2507 if (!wsink && !(strcmp(w->name, sink))) {
2508 wtsink = w;
2509 if (w->dapm == dapm)
2510 wsink = w;
2511 continue;
2512 }
2513 if (!wsource && !(strcmp(w->name, source))) {
2514 wtsource = w;
2515 if (w->dapm == dapm)
2516 wsource = w;
2517 }
2518 }
2519 /* use widget from another DAPM context if not found from this */
2520 if (!wsink)
2521 wsink = wtsink;
2522 if (!wsource)
2523 wsource = wtsource;
2524
2525 if (wsource == NULL) {
2526 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2527 route->source);
2528 return -ENODEV;
2529 }
2530 if (wsink == NULL) {
2531 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2532 route->sink);
2533 return -ENODEV;
2534 }
2535
2536 ret = snd_soc_dapm_add_path(dapm, wsource, wsink, route->control,
2537 route->connected);
2538 if (ret)
2539 goto err;
2540
2541 return 0;
2542 err:
2543 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
2544 source, route->control, sink);
2545 return ret;
2546 }
2547
2548 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2549 const struct snd_soc_dapm_route *route)
2550 {
2551 struct snd_soc_dapm_path *path, *p;
2552 const char *sink;
2553 const char *source;
2554 char prefixed_sink[80];
2555 char prefixed_source[80];
2556
2557 if (route->control) {
2558 dev_err(dapm->dev,
2559 "ASoC: Removal of routes with controls not supported\n");
2560 return -EINVAL;
2561 }
2562
2563 if (dapm->codec && dapm->codec->name_prefix) {
2564 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2565 dapm->codec->name_prefix, route->sink);
2566 sink = prefixed_sink;
2567 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2568 dapm->codec->name_prefix, route->source);
2569 source = prefixed_source;
2570 } else {
2571 sink = route->sink;
2572 source = route->source;
2573 }
2574
2575 path = NULL;
2576 list_for_each_entry(p, &dapm->card->paths, list) {
2577 if (strcmp(p->source->name, source) != 0)
2578 continue;
2579 if (strcmp(p->sink->name, sink) != 0)
2580 continue;
2581 path = p;
2582 break;
2583 }
2584
2585 if (path) {
2586 dapm_mark_dirty(path->source, "Route removed");
2587 dapm_mark_dirty(path->sink, "Route removed");
2588
2589 dapm_free_path(path);
2590 } else {
2591 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
2592 source, sink);
2593 }
2594
2595 return 0;
2596 }
2597
2598 /**
2599 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2600 * @dapm: DAPM context
2601 * @route: audio routes
2602 * @num: number of routes
2603 *
2604 * Connects 2 dapm widgets together via a named audio path. The sink is
2605 * the widget receiving the audio signal, whilst the source is the sender
2606 * of the audio signal.
2607 *
2608 * Returns 0 for success else error. On error all resources can be freed
2609 * with a call to snd_soc_card_free().
2610 */
2611 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2612 const struct snd_soc_dapm_route *route, int num)
2613 {
2614 int i, r, ret = 0;
2615
2616 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2617 for (i = 0; i < num; i++) {
2618 r = snd_soc_dapm_add_route(dapm, route, false);
2619 if (r < 0) {
2620 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2621 route->source,
2622 route->control ? route->control : "direct",
2623 route->sink);
2624 ret = r;
2625 }
2626 route++;
2627 }
2628 mutex_unlock(&dapm->card->dapm_mutex);
2629
2630 return ret;
2631 }
2632 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2633
2634 /**
2635 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2636 * @dapm: DAPM context
2637 * @route: audio routes
2638 * @num: number of routes
2639 *
2640 * Removes routes from the DAPM context.
2641 */
2642 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2643 const struct snd_soc_dapm_route *route, int num)
2644 {
2645 int i, ret = 0;
2646
2647 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2648 for (i = 0; i < num; i++) {
2649 snd_soc_dapm_del_route(dapm, route);
2650 route++;
2651 }
2652 mutex_unlock(&dapm->card->dapm_mutex);
2653
2654 return ret;
2655 }
2656 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2657
2658 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2659 const struct snd_soc_dapm_route *route)
2660 {
2661 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2662 route->source,
2663 true);
2664 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2665 route->sink,
2666 true);
2667 struct snd_soc_dapm_path *path;
2668 int count = 0;
2669
2670 if (!source) {
2671 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
2672 route->source);
2673 return -ENODEV;
2674 }
2675
2676 if (!sink) {
2677 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
2678 route->sink);
2679 return -ENODEV;
2680 }
2681
2682 if (route->control || route->connected)
2683 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
2684 route->source, route->sink);
2685
2686 list_for_each_entry(path, &source->sinks, list_source) {
2687 if (path->sink == sink) {
2688 path->weak = 1;
2689 count++;
2690 }
2691 }
2692
2693 if (count == 0)
2694 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
2695 route->source, route->sink);
2696 if (count > 1)
2697 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
2698 count, route->source, route->sink);
2699
2700 return 0;
2701 }
2702
2703 /**
2704 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2705 * @dapm: DAPM context
2706 * @route: audio routes
2707 * @num: number of routes
2708 *
2709 * Mark existing routes matching those specified in the passed array
2710 * as being weak, meaning that they are ignored for the purpose of
2711 * power decisions. The main intended use case is for sidetone paths
2712 * which couple audio between other independent paths if they are both
2713 * active in order to make the combination work better at the user
2714 * level but which aren't intended to be "used".
2715 *
2716 * Note that CODEC drivers should not use this as sidetone type paths
2717 * can frequently also be used as bypass paths.
2718 */
2719 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2720 const struct snd_soc_dapm_route *route, int num)
2721 {
2722 int i, err;
2723 int ret = 0;
2724
2725 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2726 for (i = 0; i < num; i++) {
2727 err = snd_soc_dapm_weak_route(dapm, route);
2728 if (err)
2729 ret = err;
2730 route++;
2731 }
2732 mutex_unlock(&dapm->card->dapm_mutex);
2733
2734 return ret;
2735 }
2736 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2737
2738 /**
2739 * snd_soc_dapm_new_widgets - add new dapm widgets
2740 * @dapm: DAPM context
2741 *
2742 * Checks the codec for any new dapm widgets and creates them if found.
2743 *
2744 * Returns 0 for success.
2745 */
2746 int snd_soc_dapm_new_widgets(struct snd_soc_card *card)
2747 {
2748 struct snd_soc_dapm_widget *w;
2749 unsigned int val;
2750
2751 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2752
2753 list_for_each_entry(w, &card->widgets, list)
2754 {
2755 if (w->new)
2756 continue;
2757
2758 if (w->num_kcontrols) {
2759 w->kcontrols = kzalloc(w->num_kcontrols *
2760 sizeof(struct snd_kcontrol *),
2761 GFP_KERNEL);
2762 if (!w->kcontrols) {
2763 mutex_unlock(&card->dapm_mutex);
2764 return -ENOMEM;
2765 }
2766 }
2767
2768 switch(w->id) {
2769 case snd_soc_dapm_switch:
2770 case snd_soc_dapm_mixer:
2771 case snd_soc_dapm_mixer_named_ctl:
2772 dapm_new_mixer(w);
2773 break;
2774 case snd_soc_dapm_mux:
2775 case snd_soc_dapm_virt_mux:
2776 case snd_soc_dapm_value_mux:
2777 dapm_new_mux(w);
2778 break;
2779 case snd_soc_dapm_pga:
2780 case snd_soc_dapm_out_drv:
2781 dapm_new_pga(w);
2782 break;
2783 default:
2784 break;
2785 }
2786
2787 /* Read the initial power state from the device */
2788 if (w->reg >= 0) {
2789 soc_widget_read(w, w->reg, &val);
2790 val = val >> w->shift;
2791 val &= w->mask;
2792 if (val == w->on_val)
2793 w->power = 1;
2794 }
2795
2796 w->new = 1;
2797
2798 dapm_mark_dirty(w, "new widget");
2799 dapm_debugfs_add_widget(w);
2800 }
2801
2802 dapm_power_widgets(card, SND_SOC_DAPM_STREAM_NOP);
2803 mutex_unlock(&card->dapm_mutex);
2804 return 0;
2805 }
2806 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2807
2808 /**
2809 * snd_soc_dapm_get_volsw - dapm mixer get callback
2810 * @kcontrol: mixer control
2811 * @ucontrol: control element information
2812 *
2813 * Callback to get the value of a dapm mixer control.
2814 *
2815 * Returns 0 for success.
2816 */
2817 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2818 struct snd_ctl_elem_value *ucontrol)
2819 {
2820 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2821 struct snd_soc_card *card = codec->card;
2822 struct soc_mixer_control *mc =
2823 (struct soc_mixer_control *)kcontrol->private_value;
2824 int reg = mc->reg;
2825 unsigned int shift = mc->shift;
2826 int max = mc->max;
2827 unsigned int mask = (1 << fls(max)) - 1;
2828 unsigned int invert = mc->invert;
2829 unsigned int val;
2830
2831 if (snd_soc_volsw_is_stereo(mc))
2832 dev_warn(codec->dapm.dev,
2833 "ASoC: Control '%s' is stereo, which is not supported\n",
2834 kcontrol->id.name);
2835
2836 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2837 if (dapm_kcontrol_is_powered(kcontrol) && reg != SND_SOC_NOPM)
2838 val = (snd_soc_read(codec, reg) >> shift) & mask;
2839 else
2840 val = dapm_kcontrol_get_value(kcontrol);
2841 mutex_unlock(&card->dapm_mutex);
2842
2843 if (invert)
2844 ucontrol->value.integer.value[0] = max - val;
2845 else
2846 ucontrol->value.integer.value[0] = val;
2847
2848 return 0;
2849 }
2850 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2851
2852 /**
2853 * snd_soc_dapm_put_volsw - dapm mixer set callback
2854 * @kcontrol: mixer control
2855 * @ucontrol: control element information
2856 *
2857 * Callback to set the value of a dapm mixer control.
2858 *
2859 * Returns 0 for success.
2860 */
2861 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2862 struct snd_ctl_elem_value *ucontrol)
2863 {
2864 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2865 struct snd_soc_card *card = codec->card;
2866 struct soc_mixer_control *mc =
2867 (struct soc_mixer_control *)kcontrol->private_value;
2868 int reg = mc->reg;
2869 unsigned int shift = mc->shift;
2870 int max = mc->max;
2871 unsigned int mask = (1 << fls(max)) - 1;
2872 unsigned int invert = mc->invert;
2873 unsigned int val;
2874 int connect, change;
2875 struct snd_soc_dapm_update update;
2876 int ret = 0;
2877
2878 if (snd_soc_volsw_is_stereo(mc))
2879 dev_warn(codec->dapm.dev,
2880 "ASoC: Control '%s' is stereo, which is not supported\n",
2881 kcontrol->id.name);
2882
2883 val = (ucontrol->value.integer.value[0] & mask);
2884 connect = !!val;
2885
2886 if (invert)
2887 val = max - val;
2888
2889 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2890
2891 change = dapm_kcontrol_set_value(kcontrol, val);
2892
2893 if (reg != SND_SOC_NOPM) {
2894 mask = mask << shift;
2895 val = val << shift;
2896
2897 change = snd_soc_test_bits(codec, reg, mask, val);
2898 }
2899
2900 if (change) {
2901 if (reg != SND_SOC_NOPM) {
2902 update.kcontrol = kcontrol;
2903 update.reg = reg;
2904 update.mask = mask;
2905 update.val = val;
2906
2907 card->update = &update;
2908 }
2909
2910 ret = soc_dapm_mixer_update_power(card, kcontrol, connect);
2911
2912 card->update = NULL;
2913 }
2914
2915 mutex_unlock(&card->dapm_mutex);
2916
2917 if (ret > 0)
2918 soc_dpcm_runtime_update(card);
2919
2920 return change;
2921 }
2922 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2923
2924 /**
2925 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2926 * @kcontrol: mixer control
2927 * @ucontrol: control element information
2928 *
2929 * Callback to get the value of a dapm enumerated double mixer control.
2930 *
2931 * Returns 0 for success.
2932 */
2933 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2934 struct snd_ctl_elem_value *ucontrol)
2935 {
2936 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2937 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2938 unsigned int val;
2939
2940 val = snd_soc_read(codec, e->reg);
2941 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & e->mask;
2942 if (e->shift_l != e->shift_r)
2943 ucontrol->value.enumerated.item[1] =
2944 (val >> e->shift_r) & e->mask;
2945
2946 return 0;
2947 }
2948 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2949
2950 /**
2951 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2952 * @kcontrol: mixer control
2953 * @ucontrol: control element information
2954 *
2955 * Callback to set the value of a dapm enumerated double mixer control.
2956 *
2957 * Returns 0 for success.
2958 */
2959 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2960 struct snd_ctl_elem_value *ucontrol)
2961 {
2962 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
2963 struct snd_soc_card *card = codec->card;
2964 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2965 unsigned int val, mux, change;
2966 unsigned int mask;
2967 struct snd_soc_dapm_update update;
2968 int ret = 0;
2969
2970 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2971 return -EINVAL;
2972 mux = ucontrol->value.enumerated.item[0];
2973 val = mux << e->shift_l;
2974 mask = e->mask << e->shift_l;
2975 if (e->shift_l != e->shift_r) {
2976 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2977 return -EINVAL;
2978 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2979 mask |= e->mask << e->shift_r;
2980 }
2981
2982 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2983
2984 change = snd_soc_test_bits(codec, e->reg, mask, val);
2985 if (change) {
2986 update.kcontrol = kcontrol;
2987 update.reg = e->reg;
2988 update.mask = mask;
2989 update.val = val;
2990 card->update = &update;
2991
2992 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
2993
2994 card->update = NULL;
2995 }
2996
2997 mutex_unlock(&card->dapm_mutex);
2998
2999 if (ret > 0)
3000 soc_dpcm_runtime_update(card);
3001
3002 return change;
3003 }
3004 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
3005
3006 /**
3007 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
3008 * @kcontrol: mixer control
3009 * @ucontrol: control element information
3010 *
3011 * Returns 0 for success.
3012 */
3013 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
3014 struct snd_ctl_elem_value *ucontrol)
3015 {
3016 ucontrol->value.enumerated.item[0] = dapm_kcontrol_get_value(kcontrol);
3017 return 0;
3018 }
3019 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
3020
3021 /**
3022 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
3023 * @kcontrol: mixer control
3024 * @ucontrol: control element information
3025 *
3026 * Returns 0 for success.
3027 */
3028 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
3029 struct snd_ctl_elem_value *ucontrol)
3030 {
3031 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
3032 struct snd_soc_card *card = codec->card;
3033 unsigned int value;
3034 struct soc_enum *e =
3035 (struct soc_enum *)kcontrol->private_value;
3036 int change;
3037 int ret = 0;
3038
3039 if (ucontrol->value.enumerated.item[0] >= e->max)
3040 return -EINVAL;
3041
3042 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3043
3044 value = ucontrol->value.enumerated.item[0];
3045 change = dapm_kcontrol_set_value(kcontrol, value);
3046 if (change)
3047 ret = soc_dapm_mux_update_power(card, kcontrol, value, e);
3048
3049 mutex_unlock(&card->dapm_mutex);
3050
3051 if (ret > 0)
3052 soc_dpcm_runtime_update(card);
3053
3054 return change;
3055 }
3056 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
3057
3058 /**
3059 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
3060 * callback
3061 * @kcontrol: mixer control
3062 * @ucontrol: control element information
3063 *
3064 * Callback to get the value of a dapm semi enumerated double mixer control.
3065 *
3066 * Semi enumerated mixer: the enumerated items are referred as values. Can be
3067 * used for handling bitfield coded enumeration for example.
3068 *
3069 * Returns 0 for success.
3070 */
3071 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
3072 struct snd_ctl_elem_value *ucontrol)
3073 {
3074 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
3075 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3076 unsigned int reg_val, val, mux;
3077
3078 reg_val = snd_soc_read(codec, e->reg);
3079 val = (reg_val >> e->shift_l) & e->mask;
3080 for (mux = 0; mux < e->max; mux++) {
3081 if (val == e->values[mux])
3082 break;
3083 }
3084 ucontrol->value.enumerated.item[0] = mux;
3085 if (e->shift_l != e->shift_r) {
3086 val = (reg_val >> e->shift_r) & e->mask;
3087 for (mux = 0; mux < e->max; mux++) {
3088 if (val == e->values[mux])
3089 break;
3090 }
3091 ucontrol->value.enumerated.item[1] = mux;
3092 }
3093
3094 return 0;
3095 }
3096 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
3097
3098 /**
3099 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
3100 * callback
3101 * @kcontrol: mixer control
3102 * @ucontrol: control element information
3103 *
3104 * Callback to set the value of a dapm semi enumerated double mixer control.
3105 *
3106 * Semi enumerated mixer: the enumerated items are referred as values. Can be
3107 * used for handling bitfield coded enumeration for example.
3108 *
3109 * Returns 0 for success.
3110 */
3111 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
3112 struct snd_ctl_elem_value *ucontrol)
3113 {
3114 struct snd_soc_codec *codec = snd_soc_dapm_kcontrol_codec(kcontrol);
3115 struct snd_soc_card *card = codec->card;
3116 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3117 unsigned int val, mux, change;
3118 unsigned int mask;
3119 struct snd_soc_dapm_update update;
3120 int ret = 0;
3121
3122 if (ucontrol->value.enumerated.item[0] > e->max - 1)
3123 return -EINVAL;
3124 mux = ucontrol->value.enumerated.item[0];
3125 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
3126 mask = e->mask << e->shift_l;
3127 if (e->shift_l != e->shift_r) {
3128 if (ucontrol->value.enumerated.item[1] > e->max - 1)
3129 return -EINVAL;
3130 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
3131 mask |= e->mask << e->shift_r;
3132 }
3133
3134 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3135
3136 change = snd_soc_test_bits(codec, e->reg, mask, val);
3137 if (change) {
3138 update.kcontrol = kcontrol;
3139 update.reg = e->reg;
3140 update.mask = mask;
3141 update.val = val;
3142 card->update = &update;
3143
3144 ret = soc_dapm_mux_update_power(card, kcontrol, mux, e);
3145
3146 card->update = NULL;
3147 }
3148
3149 mutex_unlock(&card->dapm_mutex);
3150
3151 if (ret > 0)
3152 soc_dpcm_runtime_update(card);
3153
3154 return change;
3155 }
3156 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
3157
3158 /**
3159 * snd_soc_dapm_info_pin_switch - Info for a pin switch
3160 *
3161 * @kcontrol: mixer control
3162 * @uinfo: control element information
3163 *
3164 * Callback to provide information about a pin switch control.
3165 */
3166 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3167 struct snd_ctl_elem_info *uinfo)
3168 {
3169 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3170 uinfo->count = 1;
3171 uinfo->value.integer.min = 0;
3172 uinfo->value.integer.max = 1;
3173
3174 return 0;
3175 }
3176 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3177
3178 /**
3179 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3180 *
3181 * @kcontrol: mixer control
3182 * @ucontrol: Value
3183 */
3184 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3185 struct snd_ctl_elem_value *ucontrol)
3186 {
3187 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3188 const char *pin = (const char *)kcontrol->private_value;
3189
3190 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3191
3192 ucontrol->value.integer.value[0] =
3193 snd_soc_dapm_get_pin_status(&card->dapm, pin);
3194
3195 mutex_unlock(&card->dapm_mutex);
3196
3197 return 0;
3198 }
3199 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3200
3201 /**
3202 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3203 *
3204 * @kcontrol: mixer control
3205 * @ucontrol: Value
3206 */
3207 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3208 struct snd_ctl_elem_value *ucontrol)
3209 {
3210 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
3211 const char *pin = (const char *)kcontrol->private_value;
3212
3213 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3214
3215 if (ucontrol->value.integer.value[0])
3216 snd_soc_dapm_enable_pin(&card->dapm, pin);
3217 else
3218 snd_soc_dapm_disable_pin(&card->dapm, pin);
3219
3220 mutex_unlock(&card->dapm_mutex);
3221
3222 snd_soc_dapm_sync(&card->dapm);
3223 return 0;
3224 }
3225 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3226
3227 static struct snd_soc_dapm_widget *
3228 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3229 const struct snd_soc_dapm_widget *widget)
3230 {
3231 struct snd_soc_dapm_widget *w;
3232 int ret;
3233
3234 if ((w = dapm_cnew_widget(widget)) == NULL)
3235 return NULL;
3236
3237 switch (w->id) {
3238 case snd_soc_dapm_regulator_supply:
3239 w->regulator = devm_regulator_get(dapm->dev, w->name);
3240 if (IS_ERR(w->regulator)) {
3241 ret = PTR_ERR(w->regulator);
3242 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3243 w->name, ret);
3244 return NULL;
3245 }
3246
3247 if (w->on_val & SND_SOC_DAPM_REGULATOR_BYPASS) {
3248 ret = regulator_allow_bypass(w->regulator, true);
3249 if (ret != 0)
3250 dev_warn(w->dapm->dev,
3251 "ASoC: Failed to unbypass %s: %d\n",
3252 w->name, ret);
3253 }
3254 break;
3255 case snd_soc_dapm_clock_supply:
3256 #ifdef CONFIG_CLKDEV_LOOKUP
3257 w->clk = devm_clk_get(dapm->dev, w->name);
3258 if (IS_ERR(w->clk)) {
3259 ret = PTR_ERR(w->clk);
3260 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
3261 w->name, ret);
3262 return NULL;
3263 }
3264 #else
3265 return NULL;
3266 #endif
3267 break;
3268 default:
3269 break;
3270 }
3271
3272 if (dapm->codec && dapm->codec->name_prefix)
3273 w->name = kasprintf(GFP_KERNEL, "%s %s",
3274 dapm->codec->name_prefix, widget->name);
3275 else
3276 w->name = kasprintf(GFP_KERNEL, "%s", widget->name);
3277
3278 if (w->name == NULL) {
3279 kfree(w);
3280 return NULL;
3281 }
3282
3283 switch (w->id) {
3284 case snd_soc_dapm_switch:
3285 case snd_soc_dapm_mixer:
3286 case snd_soc_dapm_mixer_named_ctl:
3287 w->power_check = dapm_generic_check_power;
3288 break;
3289 case snd_soc_dapm_mux:
3290 case snd_soc_dapm_virt_mux:
3291 case snd_soc_dapm_value_mux:
3292 w->power_check = dapm_generic_check_power;
3293 break;
3294 case snd_soc_dapm_dai_out:
3295 w->power_check = dapm_adc_check_power;
3296 break;
3297 case snd_soc_dapm_dai_in:
3298 w->power_check = dapm_dac_check_power;
3299 break;
3300 case snd_soc_dapm_adc:
3301 case snd_soc_dapm_aif_out:
3302 case snd_soc_dapm_dac:
3303 case snd_soc_dapm_aif_in:
3304 case snd_soc_dapm_pga:
3305 case snd_soc_dapm_out_drv:
3306 case snd_soc_dapm_input:
3307 case snd_soc_dapm_output:
3308 case snd_soc_dapm_micbias:
3309 case snd_soc_dapm_spk:
3310 case snd_soc_dapm_hp:
3311 case snd_soc_dapm_mic:
3312 case snd_soc_dapm_line:
3313 case snd_soc_dapm_dai_link:
3314 w->power_check = dapm_generic_check_power;
3315 break;
3316 case snd_soc_dapm_supply:
3317 case snd_soc_dapm_regulator_supply:
3318 case snd_soc_dapm_clock_supply:
3319 case snd_soc_dapm_kcontrol:
3320 w->power_check = dapm_supply_check_power;
3321 break;
3322 default:
3323 w->power_check = dapm_always_on_check_power;
3324 break;
3325 }
3326
3327 w->dapm = dapm;
3328 w->codec = dapm->codec;
3329 w->platform = dapm->platform;
3330 INIT_LIST_HEAD(&w->sources);
3331 INIT_LIST_HEAD(&w->sinks);
3332 INIT_LIST_HEAD(&w->list);
3333 INIT_LIST_HEAD(&w->dirty);
3334 list_add(&w->list, &dapm->card->widgets);
3335
3336 /* machine layer set ups unconnected pins and insertions */
3337 w->connected = 1;
3338 return w;
3339 }
3340
3341 /**
3342 * snd_soc_dapm_new_controls - create new dapm controls
3343 * @dapm: DAPM context
3344 * @widget: widget array
3345 * @num: number of widgets
3346 *
3347 * Creates new DAPM controls based upon the templates.
3348 *
3349 * Returns 0 for success else error.
3350 */
3351 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3352 const struct snd_soc_dapm_widget *widget,
3353 int num)
3354 {
3355 struct snd_soc_dapm_widget *w;
3356 int i;
3357 int ret = 0;
3358
3359 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3360 for (i = 0; i < num; i++) {
3361 w = snd_soc_dapm_new_control(dapm, widget);
3362 if (!w) {
3363 dev_err(dapm->dev,
3364 "ASoC: Failed to create DAPM control %s\n",
3365 widget->name);
3366 ret = -ENOMEM;
3367 break;
3368 }
3369 widget++;
3370 }
3371 mutex_unlock(&dapm->card->dapm_mutex);
3372 return ret;
3373 }
3374 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3375
3376 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3377 struct snd_kcontrol *kcontrol, int event)
3378 {
3379 struct snd_soc_dapm_path *source_p, *sink_p;
3380 struct snd_soc_dai *source, *sink;
3381 const struct snd_soc_pcm_stream *config = w->params;
3382 struct snd_pcm_substream substream;
3383 struct snd_pcm_hw_params *params = NULL;
3384 u64 fmt;
3385 int ret;
3386
3387 if (WARN_ON(!config) ||
3388 WARN_ON(list_empty(&w->sources) || list_empty(&w->sinks)))
3389 return -EINVAL;
3390
3391 /* We only support a single source and sink, pick the first */
3392 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3393 list_sink);
3394 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3395 list_source);
3396
3397 if (WARN_ON(!source_p || !sink_p) ||
3398 WARN_ON(!sink_p->source || !source_p->sink) ||
3399 WARN_ON(!source_p->source || !sink_p->sink))
3400 return -EINVAL;
3401
3402 source = source_p->source->priv;
3403 sink = sink_p->sink->priv;
3404
3405 /* Be a little careful as we don't want to overflow the mask array */
3406 if (config->formats) {
3407 fmt = ffs(config->formats) - 1;
3408 } else {
3409 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
3410 config->formats);
3411 fmt = 0;
3412 }
3413
3414 /* Currently very limited parameter selection */
3415 params = kzalloc(sizeof(*params), GFP_KERNEL);
3416 if (!params) {
3417 ret = -ENOMEM;
3418 goto out;
3419 }
3420 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3421
3422 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3423 config->rate_min;
3424 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3425 config->rate_max;
3426
3427 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3428 = config->channels_min;
3429 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3430 = config->channels_max;
3431
3432 memset(&substream, 0, sizeof(substream));
3433
3434 switch (event) {
3435 case SND_SOC_DAPM_PRE_PMU:
3436 if (source->driver->ops && source->driver->ops->hw_params) {
3437 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3438 ret = source->driver->ops->hw_params(&substream,
3439 params, source);
3440 if (ret != 0) {
3441 dev_err(source->dev,
3442 "ASoC: hw_params() failed: %d\n", ret);
3443 goto out;
3444 }
3445 }
3446
3447 if (sink->driver->ops && sink->driver->ops->hw_params) {
3448 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3449 ret = sink->driver->ops->hw_params(&substream, params,
3450 sink);
3451 if (ret != 0) {
3452 dev_err(sink->dev,
3453 "ASoC: hw_params() failed: %d\n", ret);
3454 goto out;
3455 }
3456 }
3457 break;
3458
3459 case SND_SOC_DAPM_POST_PMU:
3460 ret = snd_soc_dai_digital_mute(sink, 0,
3461 SNDRV_PCM_STREAM_PLAYBACK);
3462 if (ret != 0 && ret != -ENOTSUPP)
3463 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
3464 ret = 0;
3465 break;
3466
3467 case SND_SOC_DAPM_PRE_PMD:
3468 ret = snd_soc_dai_digital_mute(sink, 1,
3469 SNDRV_PCM_STREAM_PLAYBACK);
3470 if (ret != 0 && ret != -ENOTSUPP)
3471 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
3472 ret = 0;
3473 break;
3474
3475 default:
3476 WARN(1, "Unknown event %d\n", event);
3477 return -EINVAL;
3478 }
3479
3480 out:
3481 kfree(params);
3482 return ret;
3483 }
3484
3485 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3486 const struct snd_soc_pcm_stream *params,
3487 struct snd_soc_dapm_widget *source,
3488 struct snd_soc_dapm_widget *sink)
3489 {
3490 struct snd_soc_dapm_route routes[2];
3491 struct snd_soc_dapm_widget template;
3492 struct snd_soc_dapm_widget *w;
3493 size_t len;
3494 char *link_name;
3495
3496 len = strlen(source->name) + strlen(sink->name) + 2;
3497 link_name = devm_kzalloc(card->dev, len, GFP_KERNEL);
3498 if (!link_name)
3499 return -ENOMEM;
3500 snprintf(link_name, len, "%s-%s", source->name, sink->name);
3501
3502 memset(&template, 0, sizeof(template));
3503 template.reg = SND_SOC_NOPM;
3504 template.id = snd_soc_dapm_dai_link;
3505 template.name = link_name;
3506 template.event = snd_soc_dai_link_event;
3507 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3508 SND_SOC_DAPM_PRE_PMD;
3509
3510 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
3511
3512 w = snd_soc_dapm_new_control(&card->dapm, &template);
3513 if (!w) {
3514 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
3515 link_name);
3516 return -ENOMEM;
3517 }
3518
3519 w->params = params;
3520
3521 memset(&routes, 0, sizeof(routes));
3522
3523 routes[0].source = source->name;
3524 routes[0].sink = link_name;
3525 routes[1].source = link_name;
3526 routes[1].sink = sink->name;
3527
3528 return snd_soc_dapm_add_routes(&card->dapm, routes,
3529 ARRAY_SIZE(routes));
3530 }
3531
3532 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3533 struct snd_soc_dai *dai)
3534 {
3535 struct snd_soc_dapm_widget template;
3536 struct snd_soc_dapm_widget *w;
3537
3538 WARN_ON(dapm->dev != dai->dev);
3539
3540 memset(&template, 0, sizeof(template));
3541 template.reg = SND_SOC_NOPM;
3542
3543 if (dai->driver->playback.stream_name) {
3544 template.id = snd_soc_dapm_dai_in;
3545 template.name = dai->driver->playback.stream_name;
3546 template.sname = dai->driver->playback.stream_name;
3547
3548 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3549 template.name);
3550
3551 w = snd_soc_dapm_new_control(dapm, &template);
3552 if (!w) {
3553 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3554 dai->driver->playback.stream_name);
3555 return -ENOMEM;
3556 }
3557
3558 w->priv = dai;
3559 dai->playback_widget = w;
3560 }
3561
3562 if (dai->driver->capture.stream_name) {
3563 template.id = snd_soc_dapm_dai_out;
3564 template.name = dai->driver->capture.stream_name;
3565 template.sname = dai->driver->capture.stream_name;
3566
3567 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
3568 template.name);
3569
3570 w = snd_soc_dapm_new_control(dapm, &template);
3571 if (!w) {
3572 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
3573 dai->driver->capture.stream_name);
3574 return -ENOMEM;
3575 }
3576
3577 w->priv = dai;
3578 dai->capture_widget = w;
3579 }
3580
3581 return 0;
3582 }
3583
3584 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3585 {
3586 struct snd_soc_dapm_widget *dai_w, *w;
3587 struct snd_soc_dai *dai;
3588
3589 /* For each DAI widget... */
3590 list_for_each_entry(dai_w, &card->widgets, list) {
3591 switch (dai_w->id) {
3592 case snd_soc_dapm_dai_in:
3593 case snd_soc_dapm_dai_out:
3594 break;
3595 default:
3596 continue;
3597 }
3598
3599 dai = dai_w->priv;
3600
3601 /* ...find all widgets with the same stream and link them */
3602 list_for_each_entry(w, &card->widgets, list) {
3603 if (w->dapm != dai_w->dapm)
3604 continue;
3605
3606 switch (w->id) {
3607 case snd_soc_dapm_dai_in:
3608 case snd_soc_dapm_dai_out:
3609 continue;
3610 default:
3611 break;
3612 }
3613
3614 if (!w->sname || !strstr(w->sname, dai_w->name))
3615 continue;
3616
3617 if (dai->driver->playback.stream_name &&
3618 strstr(w->sname,
3619 dai->driver->playback.stream_name)) {
3620 dev_dbg(dai->dev, "%s -> %s\n",
3621 dai->playback_widget->name, w->name);
3622
3623 snd_soc_dapm_add_path(w->dapm,
3624 dai->playback_widget, w, NULL, NULL);
3625 }
3626
3627 if (dai->driver->capture.stream_name &&
3628 strstr(w->sname,
3629 dai->driver->capture.stream_name)) {
3630 dev_dbg(dai->dev, "%s -> %s\n",
3631 w->name, dai->capture_widget->name);
3632
3633 snd_soc_dapm_add_path(w->dapm, w,
3634 dai->capture_widget, NULL, NULL);
3635 }
3636 }
3637 }
3638
3639 return 0;
3640 }
3641
3642 void snd_soc_dapm_connect_dai_link_widgets(struct snd_soc_card *card)
3643 {
3644 struct snd_soc_pcm_runtime *rtd = card->rtd;
3645 struct snd_soc_dai *cpu_dai, *codec_dai;
3646 struct snd_soc_dapm_route r;
3647 int i;
3648
3649 memset(&r, 0, sizeof(r));
3650
3651 /* for each BE DAI link... */
3652 for (i = 0; i < card->num_rtd; i++) {
3653 rtd = &card->rtd[i];
3654 cpu_dai = rtd->cpu_dai;
3655 codec_dai = rtd->codec_dai;
3656
3657 /* dynamic FE links have no fixed DAI mapping */
3658 if (rtd->dai_link->dynamic)
3659 continue;
3660
3661 /* there is no point in connecting BE DAI links with dummies */
3662 if (snd_soc_dai_is_dummy(codec_dai) ||
3663 snd_soc_dai_is_dummy(cpu_dai))
3664 continue;
3665
3666 /* connect BE DAI playback if widgets are valid */
3667 if (codec_dai->playback_widget && cpu_dai->playback_widget) {
3668 r.source = cpu_dai->playback_widget->name;
3669 r.sink = codec_dai->playback_widget->name;
3670 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3671 cpu_dai->codec->name, r.source,
3672 codec_dai->platform->name, r.sink);
3673
3674 snd_soc_dapm_add_route(&card->dapm, &r, true);
3675 }
3676
3677 /* connect BE DAI capture if widgets are valid */
3678 if (codec_dai->capture_widget && cpu_dai->capture_widget) {
3679 r.source = codec_dai->capture_widget->name;
3680 r.sink = cpu_dai->capture_widget->name;
3681 dev_dbg(rtd->dev, "connected DAI link %s:%s -> %s:%s\n",
3682 codec_dai->codec->name, r.source,
3683 cpu_dai->platform->name, r.sink);
3684
3685 snd_soc_dapm_add_route(&card->dapm, &r, true);
3686 }
3687
3688 }
3689 }
3690
3691 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3692 int event)
3693 {
3694
3695 struct snd_soc_dapm_widget *w_cpu, *w_codec;
3696 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3697 struct snd_soc_dai *codec_dai = rtd->codec_dai;
3698
3699 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
3700 w_cpu = cpu_dai->playback_widget;
3701 w_codec = codec_dai->playback_widget;
3702 } else {
3703 w_cpu = cpu_dai->capture_widget;
3704 w_codec = codec_dai->capture_widget;
3705 }
3706
3707 if (w_cpu) {
3708
3709 dapm_mark_dirty(w_cpu, "stream event");
3710
3711 switch (event) {
3712 case SND_SOC_DAPM_STREAM_START:
3713 w_cpu->active = 1;
3714 break;
3715 case SND_SOC_DAPM_STREAM_STOP:
3716 w_cpu->active = 0;
3717 break;
3718 case SND_SOC_DAPM_STREAM_SUSPEND:
3719 case SND_SOC_DAPM_STREAM_RESUME:
3720 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3721 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3722 break;
3723 }
3724 }
3725
3726 if (w_codec) {
3727
3728 dapm_mark_dirty(w_codec, "stream event");
3729
3730 switch (event) {
3731 case SND_SOC_DAPM_STREAM_START:
3732 w_codec->active = 1;
3733 break;
3734 case SND_SOC_DAPM_STREAM_STOP:
3735 w_codec->active = 0;
3736 break;
3737 case SND_SOC_DAPM_STREAM_SUSPEND:
3738 case SND_SOC_DAPM_STREAM_RESUME:
3739 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3740 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3741 break;
3742 }
3743 }
3744
3745 dapm_power_widgets(rtd->card, event);
3746 }
3747
3748 /**
3749 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3750 * @rtd: PCM runtime data
3751 * @stream: stream name
3752 * @event: stream event
3753 *
3754 * Sends a stream event to the dapm core. The core then makes any
3755 * necessary widget power changes.
3756 *
3757 * Returns 0 for success else error.
3758 */
3759 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3760 int event)
3761 {
3762 struct snd_soc_card *card = rtd->card;
3763
3764 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3765 soc_dapm_stream_event(rtd, stream, event);
3766 mutex_unlock(&card->dapm_mutex);
3767 }
3768
3769 /**
3770 * snd_soc_dapm_enable_pin - enable pin.
3771 * @dapm: DAPM context
3772 * @pin: pin name
3773 *
3774 * Enables input/output pin and its parents or children widgets iff there is
3775 * a valid audio route and active audio stream.
3776 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3777 * do any widget power switching.
3778 */
3779 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3780 {
3781 return snd_soc_dapm_set_pin(dapm, pin, 1);
3782 }
3783 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3784
3785 /**
3786 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3787 * @dapm: DAPM context
3788 * @pin: pin name
3789 *
3790 * Enables input/output pin regardless of any other state. This is
3791 * intended for use with microphone bias supplies used in microphone
3792 * jack detection.
3793 *
3794 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3795 * do any widget power switching.
3796 */
3797 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3798 const char *pin)
3799 {
3800 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3801
3802 if (!w) {
3803 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3804 return -EINVAL;
3805 }
3806
3807 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
3808 w->connected = 1;
3809 w->force = 1;
3810 dapm_mark_dirty(w, "force enable");
3811
3812 return 0;
3813 }
3814 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3815
3816 /**
3817 * snd_soc_dapm_disable_pin - disable pin.
3818 * @dapm: DAPM context
3819 * @pin: pin name
3820 *
3821 * Disables input/output pin and its parents or children widgets.
3822 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3823 * do any widget power switching.
3824 */
3825 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3826 const char *pin)
3827 {
3828 return snd_soc_dapm_set_pin(dapm, pin, 0);
3829 }
3830 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3831
3832 /**
3833 * snd_soc_dapm_nc_pin - permanently disable pin.
3834 * @dapm: DAPM context
3835 * @pin: pin name
3836 *
3837 * Marks the specified pin as being not connected, disabling it along
3838 * any parent or child widgets. At present this is identical to
3839 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3840 * additional things such as disabling controls which only affect
3841 * paths through the pin.
3842 *
3843 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3844 * do any widget power switching.
3845 */
3846 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3847 {
3848 return snd_soc_dapm_set_pin(dapm, pin, 0);
3849 }
3850 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3851
3852 /**
3853 * snd_soc_dapm_get_pin_status - get audio pin status
3854 * @dapm: DAPM context
3855 * @pin: audio signal pin endpoint (or start point)
3856 *
3857 * Get audio pin status - connected or disconnected.
3858 *
3859 * Returns 1 for connected otherwise 0.
3860 */
3861 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3862 const char *pin)
3863 {
3864 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3865
3866 if (w)
3867 return w->connected;
3868
3869 return 0;
3870 }
3871 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3872
3873 /**
3874 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3875 * @dapm: DAPM context
3876 * @pin: audio signal pin endpoint (or start point)
3877 *
3878 * Mark the given endpoint or pin as ignoring suspend. When the
3879 * system is disabled a path between two endpoints flagged as ignoring
3880 * suspend will not be disabled. The path must already be enabled via
3881 * normal means at suspend time, it will not be turned on if it was not
3882 * already enabled.
3883 */
3884 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3885 const char *pin)
3886 {
3887 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3888
3889 if (!w) {
3890 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
3891 return -EINVAL;
3892 }
3893
3894 w->ignore_suspend = 1;
3895
3896 return 0;
3897 }
3898 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3899
3900 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3901 struct snd_soc_dapm_widget *w)
3902 {
3903 struct snd_soc_dapm_path *p;
3904
3905 list_for_each_entry(p, &card->paths, list) {
3906 if ((p->source == w) || (p->sink == w)) {
3907 dev_dbg(card->dev,
3908 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3909 p->source->name, p->source->id, p->source->dapm,
3910 p->sink->name, p->sink->id, p->sink->dapm);
3911
3912 /* Connected to something other than the codec */
3913 if (p->source->dapm != p->sink->dapm)
3914 return true;
3915 /*
3916 * Loopback connection from codec external pin to
3917 * codec external pin
3918 */
3919 if (p->sink->id == snd_soc_dapm_input) {
3920 switch (p->source->id) {
3921 case snd_soc_dapm_output:
3922 case snd_soc_dapm_micbias:
3923 return true;
3924 default:
3925 break;
3926 }
3927 }
3928 }
3929 }
3930
3931 return false;
3932 }
3933
3934 /**
3935 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3936 * @codec: The codec whose pins should be processed
3937 *
3938 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3939 * which are unused. Pins are used if they are connected externally to the
3940 * codec, whether that be to some other device, or a loop-back connection to
3941 * the codec itself.
3942 */
3943 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3944 {
3945 struct snd_soc_card *card = codec->card;
3946 struct snd_soc_dapm_context *dapm = &codec->dapm;
3947 struct snd_soc_dapm_widget *w;
3948
3949 dev_dbg(codec->dev, "ASoC: Auto NC: DAPMs: card:%p codec:%p\n",
3950 &card->dapm, &codec->dapm);
3951
3952 list_for_each_entry(w, &card->widgets, list) {
3953 if (w->dapm != dapm)
3954 continue;
3955 switch (w->id) {
3956 case snd_soc_dapm_input:
3957 case snd_soc_dapm_output:
3958 case snd_soc_dapm_micbias:
3959 dev_dbg(codec->dev, "ASoC: Auto NC: Checking widget %s\n",
3960 w->name);
3961 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3962 dev_dbg(codec->dev,
3963 "... Not in map; disabling\n");
3964 snd_soc_dapm_nc_pin(dapm, w->name);
3965 }
3966 break;
3967 default:
3968 break;
3969 }
3970 }
3971 }
3972
3973 /**
3974 * snd_soc_dapm_free - free dapm resources
3975 * @dapm: DAPM context
3976 *
3977 * Free all dapm widgets and resources.
3978 */
3979 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3980 {
3981 snd_soc_dapm_sys_remove(dapm->dev);
3982 dapm_debugfs_cleanup(dapm);
3983 dapm_free_widgets(dapm);
3984 list_del(&dapm->list);
3985 }
3986 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3987
3988 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3989 {
3990 struct snd_soc_card *card = dapm->card;
3991 struct snd_soc_dapm_widget *w;
3992 LIST_HEAD(down_list);
3993 int powerdown = 0;
3994
3995 mutex_lock(&card->dapm_mutex);
3996
3997 list_for_each_entry(w, &dapm->card->widgets, list) {
3998 if (w->dapm != dapm)
3999 continue;
4000 if (w->power) {
4001 dapm_seq_insert(w, &down_list, false);
4002 w->power = 0;
4003 powerdown = 1;
4004 }
4005 }
4006
4007 /* If there were no widgets to power down we're already in
4008 * standby.
4009 */
4010 if (powerdown) {
4011 if (dapm->bias_level == SND_SOC_BIAS_ON)
4012 snd_soc_dapm_set_bias_level(dapm,
4013 SND_SOC_BIAS_PREPARE);
4014 dapm_seq_run(card, &down_list, 0, false);
4015 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
4016 snd_soc_dapm_set_bias_level(dapm,
4017 SND_SOC_BIAS_STANDBY);
4018 }
4019
4020 mutex_unlock(&card->dapm_mutex);
4021 }
4022
4023 /*
4024 * snd_soc_dapm_shutdown - callback for system shutdown
4025 */
4026 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
4027 {
4028 struct snd_soc_codec *codec;
4029
4030 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
4031 soc_dapm_shutdown_codec(&codec->dapm);
4032 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY)
4033 snd_soc_dapm_set_bias_level(&codec->dapm,
4034 SND_SOC_BIAS_OFF);
4035 }
4036 }
4037
4038 /* Module information */
4039 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
4040 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
4041 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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