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Merge tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee139...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / soc / soc-dapm.c
1 /*
2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * Features:
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
15 * DACs/ADCs.
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/headphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
20 * sinks, dacs, etc
21 * o Delayed power down of audio subsystem to reduce pops between a quick
22 * device reopen.
23 *
24 */
25
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/init.h>
29 #include <linux/async.h>
30 #include <linux/delay.h>
31 #include <linux/pm.h>
32 #include <linux/bitops.h>
33 #include <linux/platform_device.h>
34 #include <linux/jiffies.h>
35 #include <linux/debugfs.h>
36 #include <linux/pm_runtime.h>
37 #include <linux/regulator/consumer.h>
38 #include <linux/clk.h>
39 #include <linux/slab.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc.h>
44 #include <sound/initval.h>
45
46 #include <trace/events/asoc.h>
47
48 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
49
50 /* dapm power sequences - make this per codec in the future */
51 static int dapm_up_seq[] = {
52 [snd_soc_dapm_pre] = 0,
53 [snd_soc_dapm_supply] = 1,
54 [snd_soc_dapm_regulator_supply] = 1,
55 [snd_soc_dapm_clock_supply] = 1,
56 [snd_soc_dapm_micbias] = 2,
57 [snd_soc_dapm_dai_link] = 2,
58 [snd_soc_dapm_dai] = 3,
59 [snd_soc_dapm_aif_in] = 3,
60 [snd_soc_dapm_aif_out] = 3,
61 [snd_soc_dapm_mic] = 4,
62 [snd_soc_dapm_mux] = 5,
63 [snd_soc_dapm_virt_mux] = 5,
64 [snd_soc_dapm_value_mux] = 5,
65 [snd_soc_dapm_dac] = 6,
66 [snd_soc_dapm_mixer] = 7,
67 [snd_soc_dapm_mixer_named_ctl] = 7,
68 [snd_soc_dapm_pga] = 8,
69 [snd_soc_dapm_adc] = 9,
70 [snd_soc_dapm_out_drv] = 10,
71 [snd_soc_dapm_hp] = 10,
72 [snd_soc_dapm_spk] = 10,
73 [snd_soc_dapm_line] = 10,
74 [snd_soc_dapm_post] = 11,
75 };
76
77 static int dapm_down_seq[] = {
78 [snd_soc_dapm_pre] = 0,
79 [snd_soc_dapm_adc] = 1,
80 [snd_soc_dapm_hp] = 2,
81 [snd_soc_dapm_spk] = 2,
82 [snd_soc_dapm_line] = 2,
83 [snd_soc_dapm_out_drv] = 2,
84 [snd_soc_dapm_pga] = 4,
85 [snd_soc_dapm_mixer_named_ctl] = 5,
86 [snd_soc_dapm_mixer] = 5,
87 [snd_soc_dapm_dac] = 6,
88 [snd_soc_dapm_mic] = 7,
89 [snd_soc_dapm_micbias] = 8,
90 [snd_soc_dapm_mux] = 9,
91 [snd_soc_dapm_virt_mux] = 9,
92 [snd_soc_dapm_value_mux] = 9,
93 [snd_soc_dapm_aif_in] = 10,
94 [snd_soc_dapm_aif_out] = 10,
95 [snd_soc_dapm_dai] = 10,
96 [snd_soc_dapm_dai_link] = 11,
97 [snd_soc_dapm_clock_supply] = 12,
98 [snd_soc_dapm_regulator_supply] = 12,
99 [snd_soc_dapm_supply] = 12,
100 [snd_soc_dapm_post] = 13,
101 };
102
103 static void pop_wait(u32 pop_time)
104 {
105 if (pop_time)
106 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
107 }
108
109 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
110 {
111 va_list args;
112 char *buf;
113
114 if (!pop_time)
115 return;
116
117 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
118 if (buf == NULL)
119 return;
120
121 va_start(args, fmt);
122 vsnprintf(buf, PAGE_SIZE, fmt, args);
123 dev_info(dev, "%s", buf);
124 va_end(args);
125
126 kfree(buf);
127 }
128
129 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
130 {
131 return !list_empty(&w->dirty);
132 }
133
134 void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
135 {
136 if (!dapm_dirty_widget(w)) {
137 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
138 w->name, reason);
139 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
140 }
141 }
142 EXPORT_SYMBOL_GPL(dapm_mark_dirty);
143
144 /* create a new dapm widget */
145 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
146 const struct snd_soc_dapm_widget *_widget)
147 {
148 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
149 }
150
151 /* get snd_card from DAPM context */
152 static inline struct snd_card *dapm_get_snd_card(
153 struct snd_soc_dapm_context *dapm)
154 {
155 if (dapm->codec)
156 return dapm->codec->card->snd_card;
157 else if (dapm->platform)
158 return dapm->platform->card->snd_card;
159 else
160 BUG();
161
162 /* unreachable */
163 return NULL;
164 }
165
166 /* get soc_card from DAPM context */
167 static inline struct snd_soc_card *dapm_get_soc_card(
168 struct snd_soc_dapm_context *dapm)
169 {
170 if (dapm->codec)
171 return dapm->codec->card;
172 else if (dapm->platform)
173 return dapm->platform->card;
174 else
175 BUG();
176
177 /* unreachable */
178 return NULL;
179 }
180
181 static void dapm_reset(struct snd_soc_card *card)
182 {
183 struct snd_soc_dapm_widget *w;
184
185 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
186
187 list_for_each_entry(w, &card->widgets, list) {
188 w->power_checked = false;
189 w->inputs = -1;
190 w->outputs = -1;
191 }
192 }
193
194 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
195 {
196 if (w->codec)
197 return snd_soc_read(w->codec, reg);
198 else if (w->platform)
199 return snd_soc_platform_read(w->platform, reg);
200
201 dev_err(w->dapm->dev, "no valid widget read method\n");
202 return -1;
203 }
204
205 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
206 {
207 if (w->codec)
208 return snd_soc_write(w->codec, reg, val);
209 else if (w->platform)
210 return snd_soc_platform_write(w->platform, reg, val);
211
212 dev_err(w->dapm->dev, "no valid widget write method\n");
213 return -1;
214 }
215
216 static inline void soc_widget_lock(struct snd_soc_dapm_widget *w)
217 {
218 if (w->codec && !w->codec->using_regmap)
219 mutex_lock(&w->codec->mutex);
220 else if (w->platform)
221 mutex_lock(&w->platform->mutex);
222 }
223
224 static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w)
225 {
226 if (w->codec && !w->codec->using_regmap)
227 mutex_unlock(&w->codec->mutex);
228 else if (w->platform)
229 mutex_unlock(&w->platform->mutex);
230 }
231
232 static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
233 unsigned short reg, unsigned int mask, unsigned int value)
234 {
235 bool change;
236 unsigned int old, new;
237 int ret;
238
239 if (w->codec && w->codec->using_regmap) {
240 ret = regmap_update_bits_check(w->codec->control_data,
241 reg, mask, value, &change);
242 if (ret != 0)
243 return ret;
244 } else {
245 soc_widget_lock(w);
246 ret = soc_widget_read(w, reg);
247 if (ret < 0) {
248 soc_widget_unlock(w);
249 return ret;
250 }
251
252 old = ret;
253 new = (old & ~mask) | (value & mask);
254 change = old != new;
255 if (change) {
256 ret = soc_widget_write(w, reg, new);
257 if (ret < 0) {
258 soc_widget_unlock(w);
259 return ret;
260 }
261 }
262 soc_widget_unlock(w);
263 }
264
265 return change;
266 }
267
268 /**
269 * snd_soc_dapm_set_bias_level - set the bias level for the system
270 * @dapm: DAPM context
271 * @level: level to configure
272 *
273 * Configure the bias (power) levels for the SoC audio device.
274 *
275 * Returns 0 for success else error.
276 */
277 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
278 enum snd_soc_bias_level level)
279 {
280 struct snd_soc_card *card = dapm->card;
281 int ret = 0;
282
283 trace_snd_soc_bias_level_start(card, level);
284
285 if (card && card->set_bias_level)
286 ret = card->set_bias_level(card, dapm, level);
287 if (ret != 0)
288 goto out;
289
290 if (dapm->codec) {
291 if (dapm->codec->driver->set_bias_level)
292 ret = dapm->codec->driver->set_bias_level(dapm->codec,
293 level);
294 } else
295 dapm->bias_level = level;
296
297 if (ret != 0)
298 goto out;
299
300 if (card && card->set_bias_level_post)
301 ret = card->set_bias_level_post(card, dapm, level);
302 out:
303 trace_snd_soc_bias_level_done(card, level);
304
305 return ret;
306 }
307
308 /* set up initial codec paths */
309 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
310 struct snd_soc_dapm_path *p, int i)
311 {
312 switch (w->id) {
313 case snd_soc_dapm_switch:
314 case snd_soc_dapm_mixer:
315 case snd_soc_dapm_mixer_named_ctl: {
316 int val;
317 struct soc_mixer_control *mc = (struct soc_mixer_control *)
318 w->kcontrol_news[i].private_value;
319 unsigned int reg = mc->reg;
320 unsigned int shift = mc->shift;
321 int max = mc->max;
322 unsigned int mask = (1 << fls(max)) - 1;
323 unsigned int invert = mc->invert;
324
325 val = soc_widget_read(w, reg);
326 val = (val >> shift) & mask;
327 if (invert)
328 val = max - val;
329
330 p->connect = !!val;
331 }
332 break;
333 case snd_soc_dapm_mux: {
334 struct soc_enum *e = (struct soc_enum *)
335 w->kcontrol_news[i].private_value;
336 int val, item, bitmask;
337
338 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
339 ;
340 val = soc_widget_read(w, e->reg);
341 item = (val >> e->shift_l) & (bitmask - 1);
342
343 p->connect = 0;
344 for (i = 0; i < e->max; i++) {
345 if (!(strcmp(p->name, e->texts[i])) && item == i)
346 p->connect = 1;
347 }
348 }
349 break;
350 case snd_soc_dapm_virt_mux: {
351 struct soc_enum *e = (struct soc_enum *)
352 w->kcontrol_news[i].private_value;
353
354 p->connect = 0;
355 /* since a virtual mux has no backing registers to
356 * decide which path to connect, it will try to match
357 * with the first enumeration. This is to ensure
358 * that the default mux choice (the first) will be
359 * correctly powered up during initialization.
360 */
361 if (!strcmp(p->name, e->texts[0]))
362 p->connect = 1;
363 }
364 break;
365 case snd_soc_dapm_value_mux: {
366 struct soc_enum *e = (struct soc_enum *)
367 w->kcontrol_news[i].private_value;
368 int val, item;
369
370 val = soc_widget_read(w, e->reg);
371 val = (val >> e->shift_l) & e->mask;
372 for (item = 0; item < e->max; item++) {
373 if (val == e->values[item])
374 break;
375 }
376
377 p->connect = 0;
378 for (i = 0; i < e->max; i++) {
379 if (!(strcmp(p->name, e->texts[i])) && item == i)
380 p->connect = 1;
381 }
382 }
383 break;
384 /* does not affect routing - always connected */
385 case snd_soc_dapm_pga:
386 case snd_soc_dapm_out_drv:
387 case snd_soc_dapm_output:
388 case snd_soc_dapm_adc:
389 case snd_soc_dapm_input:
390 case snd_soc_dapm_siggen:
391 case snd_soc_dapm_dac:
392 case snd_soc_dapm_micbias:
393 case snd_soc_dapm_vmid:
394 case snd_soc_dapm_supply:
395 case snd_soc_dapm_regulator_supply:
396 case snd_soc_dapm_clock_supply:
397 case snd_soc_dapm_aif_in:
398 case snd_soc_dapm_aif_out:
399 case snd_soc_dapm_dai:
400 case snd_soc_dapm_hp:
401 case snd_soc_dapm_mic:
402 case snd_soc_dapm_spk:
403 case snd_soc_dapm_line:
404 case snd_soc_dapm_dai_link:
405 p->connect = 1;
406 break;
407 /* does affect routing - dynamically connected */
408 case snd_soc_dapm_pre:
409 case snd_soc_dapm_post:
410 p->connect = 0;
411 break;
412 }
413 }
414
415 /* connect mux widget to its interconnecting audio paths */
416 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
417 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
418 struct snd_soc_dapm_path *path, const char *control_name,
419 const struct snd_kcontrol_new *kcontrol)
420 {
421 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
422 int i;
423
424 for (i = 0; i < e->max; i++) {
425 if (!(strcmp(control_name, e->texts[i]))) {
426 list_add(&path->list, &dapm->card->paths);
427 list_add(&path->list_sink, &dest->sources);
428 list_add(&path->list_source, &src->sinks);
429 path->name = (char*)e->texts[i];
430 dapm_set_path_status(dest, path, 0);
431 return 0;
432 }
433 }
434
435 return -ENODEV;
436 }
437
438 /* connect mixer widget to its interconnecting audio paths */
439 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
440 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
441 struct snd_soc_dapm_path *path, const char *control_name)
442 {
443 int i;
444
445 /* search for mixer kcontrol */
446 for (i = 0; i < dest->num_kcontrols; i++) {
447 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
448 list_add(&path->list, &dapm->card->paths);
449 list_add(&path->list_sink, &dest->sources);
450 list_add(&path->list_source, &src->sinks);
451 path->name = dest->kcontrol_news[i].name;
452 dapm_set_path_status(dest, path, i);
453 return 0;
454 }
455 }
456 return -ENODEV;
457 }
458
459 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
460 struct snd_soc_dapm_widget *kcontrolw,
461 const struct snd_kcontrol_new *kcontrol_new,
462 struct snd_kcontrol **kcontrol)
463 {
464 struct snd_soc_dapm_widget *w;
465 int i;
466
467 *kcontrol = NULL;
468
469 list_for_each_entry(w, &dapm->card->widgets, list) {
470 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
471 continue;
472 for (i = 0; i < w->num_kcontrols; i++) {
473 if (&w->kcontrol_news[i] == kcontrol_new) {
474 if (w->kcontrols)
475 *kcontrol = w->kcontrols[i];
476 return 1;
477 }
478 }
479 }
480
481 return 0;
482 }
483
484 /* create new dapm mixer control */
485 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
486 {
487 struct snd_soc_dapm_context *dapm = w->dapm;
488 int i, ret = 0;
489 size_t name_len, prefix_len;
490 struct snd_soc_dapm_path *path;
491 struct snd_card *card = dapm->card->snd_card;
492 const char *prefix;
493 struct snd_soc_dapm_widget_list *wlist;
494 size_t wlistsize;
495
496 if (dapm->codec)
497 prefix = dapm->codec->name_prefix;
498 else
499 prefix = NULL;
500
501 if (prefix)
502 prefix_len = strlen(prefix) + 1;
503 else
504 prefix_len = 0;
505
506 /* add kcontrol */
507 for (i = 0; i < w->num_kcontrols; i++) {
508
509 /* match name */
510 list_for_each_entry(path, &w->sources, list_sink) {
511
512 /* mixer/mux paths name must match control name */
513 if (path->name != (char *)w->kcontrol_news[i].name)
514 continue;
515
516 if (w->kcontrols[i]) {
517 path->kcontrol = w->kcontrols[i];
518 continue;
519 }
520
521 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
522 sizeof(struct snd_soc_dapm_widget *),
523 wlist = kzalloc(wlistsize, GFP_KERNEL);
524 if (wlist == NULL) {
525 dev_err(dapm->dev,
526 "asoc: can't allocate widget list for %s\n",
527 w->name);
528 return -ENOMEM;
529 }
530 wlist->num_widgets = 1;
531 wlist->widgets[0] = w;
532
533 /* add dapm control with long name.
534 * for dapm_mixer this is the concatenation of the
535 * mixer and kcontrol name.
536 * for dapm_mixer_named_ctl this is simply the
537 * kcontrol name.
538 */
539 name_len = strlen(w->kcontrol_news[i].name) + 1;
540 if (w->id != snd_soc_dapm_mixer_named_ctl)
541 name_len += 1 + strlen(w->name);
542
543 path->long_name = kmalloc(name_len, GFP_KERNEL);
544
545 if (path->long_name == NULL) {
546 kfree(wlist);
547 return -ENOMEM;
548 }
549
550 switch (w->id) {
551 default:
552 /* The control will get a prefix from
553 * the control creation process but
554 * we're also using the same prefix
555 * for widgets so cut the prefix off
556 * the front of the widget name.
557 */
558 snprintf((char *)path->long_name, name_len,
559 "%s %s", w->name + prefix_len,
560 w->kcontrol_news[i].name);
561 break;
562 case snd_soc_dapm_mixer_named_ctl:
563 snprintf((char *)path->long_name, name_len,
564 "%s", w->kcontrol_news[i].name);
565 break;
566 }
567
568 ((char *)path->long_name)[name_len - 1] = '\0';
569
570 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
571 wlist, path->long_name,
572 prefix);
573 ret = snd_ctl_add(card, path->kcontrol);
574 if (ret < 0) {
575 dev_err(dapm->dev,
576 "asoc: failed to add dapm kcontrol %s: %d\n",
577 path->long_name, ret);
578 kfree(wlist);
579 kfree(path->long_name);
580 path->long_name = NULL;
581 return ret;
582 }
583 w->kcontrols[i] = path->kcontrol;
584 }
585 }
586 return ret;
587 }
588
589 /* create new dapm mux control */
590 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
591 {
592 struct snd_soc_dapm_context *dapm = w->dapm;
593 struct snd_soc_dapm_path *path = NULL;
594 struct snd_kcontrol *kcontrol;
595 struct snd_card *card = dapm->card->snd_card;
596 const char *prefix;
597 size_t prefix_len;
598 int ret;
599 struct snd_soc_dapm_widget_list *wlist;
600 int shared, wlistentries;
601 size_t wlistsize;
602 const char *name;
603
604 if (w->num_kcontrols != 1) {
605 dev_err(dapm->dev,
606 "asoc: mux %s has incorrect number of controls\n",
607 w->name);
608 return -EINVAL;
609 }
610
611 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
612 &kcontrol);
613 if (kcontrol) {
614 wlist = kcontrol->private_data;
615 wlistentries = wlist->num_widgets + 1;
616 } else {
617 wlist = NULL;
618 wlistentries = 1;
619 }
620 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
621 wlistentries * sizeof(struct snd_soc_dapm_widget *),
622 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
623 if (wlist == NULL) {
624 dev_err(dapm->dev,
625 "asoc: can't allocate widget list for %s\n", w->name);
626 return -ENOMEM;
627 }
628 wlist->num_widgets = wlistentries;
629 wlist->widgets[wlistentries - 1] = w;
630
631 if (!kcontrol) {
632 if (dapm->codec)
633 prefix = dapm->codec->name_prefix;
634 else
635 prefix = NULL;
636
637 if (shared) {
638 name = w->kcontrol_news[0].name;
639 prefix_len = 0;
640 } else {
641 name = w->name;
642 if (prefix)
643 prefix_len = strlen(prefix) + 1;
644 else
645 prefix_len = 0;
646 }
647
648 /*
649 * The control will get a prefix from the control creation
650 * process but we're also using the same prefix for widgets so
651 * cut the prefix off the front of the widget name.
652 */
653 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
654 name + prefix_len, prefix);
655 ret = snd_ctl_add(card, kcontrol);
656 if (ret < 0) {
657 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
658 w->name, ret);
659 kfree(wlist);
660 return ret;
661 }
662 }
663
664 kcontrol->private_data = wlist;
665
666 w->kcontrols[0] = kcontrol;
667
668 list_for_each_entry(path, &w->sources, list_sink)
669 path->kcontrol = kcontrol;
670
671 return 0;
672 }
673
674 /* create new dapm volume control */
675 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
676 {
677 if (w->num_kcontrols)
678 dev_err(w->dapm->dev,
679 "asoc: PGA controls not supported: '%s'\n", w->name);
680
681 return 0;
682 }
683
684 /* reset 'walked' bit for each dapm path */
685 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
686 {
687 struct snd_soc_dapm_path *p;
688
689 list_for_each_entry(p, &dapm->card->paths, list)
690 p->walked = 0;
691 }
692
693 /* We implement power down on suspend by checking the power state of
694 * the ALSA card - when we are suspending the ALSA state for the card
695 * is set to D3.
696 */
697 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
698 {
699 int level = snd_power_get_state(widget->dapm->card->snd_card);
700
701 switch (level) {
702 case SNDRV_CTL_POWER_D3hot:
703 case SNDRV_CTL_POWER_D3cold:
704 if (widget->ignore_suspend)
705 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
706 widget->name);
707 return widget->ignore_suspend;
708 default:
709 return 1;
710 }
711 }
712
713 /* add widget to list if it's not already in the list */
714 static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list,
715 struct snd_soc_dapm_widget *w)
716 {
717 struct snd_soc_dapm_widget_list *wlist;
718 int wlistsize, wlistentries, i;
719
720 if (*list == NULL)
721 return -EINVAL;
722
723 wlist = *list;
724
725 /* is this widget already in the list */
726 for (i = 0; i < wlist->num_widgets; i++) {
727 if (wlist->widgets[i] == w)
728 return 0;
729 }
730
731 /* allocate some new space */
732 wlistentries = wlist->num_widgets + 1;
733 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
734 wlistentries * sizeof(struct snd_soc_dapm_widget *);
735 *list = krealloc(wlist, wlistsize, GFP_KERNEL);
736 if (*list == NULL) {
737 dev_err(w->dapm->dev, "can't allocate widget list for %s\n",
738 w->name);
739 return -ENOMEM;
740 }
741 wlist = *list;
742
743 /* insert the widget */
744 dev_dbg(w->dapm->dev, "added %s in widget list pos %d\n",
745 w->name, wlist->num_widgets);
746
747 wlist->widgets[wlist->num_widgets] = w;
748 wlist->num_widgets++;
749 return 1;
750 }
751
752 /*
753 * Recursively check for a completed path to an active or physically connected
754 * output widget. Returns number of complete paths.
755 */
756 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
757 struct snd_soc_dapm_widget_list **list)
758 {
759 struct snd_soc_dapm_path *path;
760 int con = 0;
761
762 if (widget->outputs >= 0)
763 return widget->outputs;
764
765 DAPM_UPDATE_STAT(widget, path_checks);
766
767 switch (widget->id) {
768 case snd_soc_dapm_supply:
769 case snd_soc_dapm_regulator_supply:
770 case snd_soc_dapm_clock_supply:
771 return 0;
772 default:
773 break;
774 }
775
776 switch (widget->id) {
777 case snd_soc_dapm_adc:
778 case snd_soc_dapm_aif_out:
779 case snd_soc_dapm_dai:
780 if (widget->active) {
781 widget->outputs = snd_soc_dapm_suspend_check(widget);
782 return widget->outputs;
783 }
784 default:
785 break;
786 }
787
788 if (widget->connected) {
789 /* connected pin ? */
790 if (widget->id == snd_soc_dapm_output && !widget->ext) {
791 widget->outputs = snd_soc_dapm_suspend_check(widget);
792 return widget->outputs;
793 }
794
795 /* connected jack or spk ? */
796 if (widget->id == snd_soc_dapm_hp ||
797 widget->id == snd_soc_dapm_spk ||
798 (widget->id == snd_soc_dapm_line &&
799 !list_empty(&widget->sources))) {
800 widget->outputs = snd_soc_dapm_suspend_check(widget);
801 return widget->outputs;
802 }
803 }
804
805 list_for_each_entry(path, &widget->sinks, list_source) {
806 DAPM_UPDATE_STAT(widget, neighbour_checks);
807
808 if (path->weak)
809 continue;
810
811 if (path->walked)
812 continue;
813
814 trace_snd_soc_dapm_output_path(widget, path);
815
816 if (path->sink && path->connect) {
817 path->walked = 1;
818
819 /* do we need to add this widget to the list ? */
820 if (list) {
821 int err;
822 err = dapm_list_add_widget(list, path->sink);
823 if (err < 0) {
824 dev_err(widget->dapm->dev, "could not add widget %s\n",
825 widget->name);
826 return con;
827 }
828 }
829
830 con += is_connected_output_ep(path->sink, list);
831 }
832 }
833
834 widget->outputs = con;
835
836 return con;
837 }
838
839 /*
840 * Recursively check for a completed path to an active or physically connected
841 * input widget. Returns number of complete paths.
842 */
843 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
844 struct snd_soc_dapm_widget_list **list)
845 {
846 struct snd_soc_dapm_path *path;
847 int con = 0;
848
849 if (widget->inputs >= 0)
850 return widget->inputs;
851
852 DAPM_UPDATE_STAT(widget, path_checks);
853
854 switch (widget->id) {
855 case snd_soc_dapm_supply:
856 case snd_soc_dapm_regulator_supply:
857 case snd_soc_dapm_clock_supply:
858 return 0;
859 default:
860 break;
861 }
862
863 /* active stream ? */
864 switch (widget->id) {
865 case snd_soc_dapm_dac:
866 case snd_soc_dapm_aif_in:
867 case snd_soc_dapm_dai:
868 if (widget->active) {
869 widget->inputs = snd_soc_dapm_suspend_check(widget);
870 return widget->inputs;
871 }
872 default:
873 break;
874 }
875
876 if (widget->connected) {
877 /* connected pin ? */
878 if (widget->id == snd_soc_dapm_input && !widget->ext) {
879 widget->inputs = snd_soc_dapm_suspend_check(widget);
880 return widget->inputs;
881 }
882
883 /* connected VMID/Bias for lower pops */
884 if (widget->id == snd_soc_dapm_vmid) {
885 widget->inputs = snd_soc_dapm_suspend_check(widget);
886 return widget->inputs;
887 }
888
889 /* connected jack ? */
890 if (widget->id == snd_soc_dapm_mic ||
891 (widget->id == snd_soc_dapm_line &&
892 !list_empty(&widget->sinks))) {
893 widget->inputs = snd_soc_dapm_suspend_check(widget);
894 return widget->inputs;
895 }
896
897 /* signal generator */
898 if (widget->id == snd_soc_dapm_siggen) {
899 widget->inputs = snd_soc_dapm_suspend_check(widget);
900 return widget->inputs;
901 }
902 }
903
904 list_for_each_entry(path, &widget->sources, list_sink) {
905 DAPM_UPDATE_STAT(widget, neighbour_checks);
906
907 if (path->weak)
908 continue;
909
910 if (path->walked)
911 continue;
912
913 trace_snd_soc_dapm_input_path(widget, path);
914
915 if (path->source && path->connect) {
916 path->walked = 1;
917
918 /* do we need to add this widget to the list ? */
919 if (list) {
920 int err;
921 err = dapm_list_add_widget(list, path->source);
922 if (err < 0) {
923 dev_err(widget->dapm->dev, "could not add widget %s\n",
924 widget->name);
925 return con;
926 }
927 }
928
929 con += is_connected_input_ep(path->source, list);
930 }
931 }
932
933 widget->inputs = con;
934
935 return con;
936 }
937
938 /**
939 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
940 * @dai: the soc DAI.
941 * @stream: stream direction.
942 * @list: list of active widgets for this stream.
943 *
944 * Queries DAPM graph as to whether an valid audio stream path exists for
945 * the initial stream specified by name. This takes into account
946 * current mixer and mux kcontrol settings. Creates list of valid widgets.
947 *
948 * Returns the number of valid paths or negative error.
949 */
950 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
951 struct snd_soc_dapm_widget_list **list)
952 {
953 struct snd_soc_card *card = dai->card;
954 int paths;
955
956 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
957 dapm_reset(card);
958
959 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
960 paths = is_connected_output_ep(dai->playback_widget, list);
961 else
962 paths = is_connected_input_ep(dai->capture_widget, list);
963
964 trace_snd_soc_dapm_connected(paths, stream);
965 dapm_clear_walk(&card->dapm);
966 mutex_unlock(&card->dapm_mutex);
967
968 return paths;
969 }
970
971 /*
972 * Handler for generic register modifier widget.
973 */
974 int dapm_reg_event(struct snd_soc_dapm_widget *w,
975 struct snd_kcontrol *kcontrol, int event)
976 {
977 unsigned int val;
978
979 if (SND_SOC_DAPM_EVENT_ON(event))
980 val = w->on_val;
981 else
982 val = w->off_val;
983
984 soc_widget_update_bits_locked(w, -(w->reg + 1),
985 w->mask << w->shift, val << w->shift);
986
987 return 0;
988 }
989 EXPORT_SYMBOL_GPL(dapm_reg_event);
990
991 /*
992 * Handler for regulator supply widget.
993 */
994 int dapm_regulator_event(struct snd_soc_dapm_widget *w,
995 struct snd_kcontrol *kcontrol, int event)
996 {
997 if (SND_SOC_DAPM_EVENT_ON(event))
998 return regulator_enable(w->regulator);
999 else
1000 return regulator_disable_deferred(w->regulator, w->shift);
1001 }
1002 EXPORT_SYMBOL_GPL(dapm_regulator_event);
1003
1004 /*
1005 * Handler for clock supply widget.
1006 */
1007 int dapm_clock_event(struct snd_soc_dapm_widget *w,
1008 struct snd_kcontrol *kcontrol, int event)
1009 {
1010 if (!w->clk)
1011 return -EIO;
1012
1013 #ifdef CONFIG_HAVE_CLK
1014 if (SND_SOC_DAPM_EVENT_ON(event)) {
1015 return clk_enable(w->clk);
1016 } else {
1017 clk_disable(w->clk);
1018 return 0;
1019 }
1020 #endif
1021 return 0;
1022 }
1023 EXPORT_SYMBOL_GPL(dapm_clock_event);
1024
1025 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1026 {
1027 if (w->power_checked)
1028 return w->new_power;
1029
1030 if (w->force)
1031 w->new_power = 1;
1032 else
1033 w->new_power = w->power_check(w);
1034
1035 w->power_checked = true;
1036
1037 return w->new_power;
1038 }
1039
1040 /* Generic check to see if a widget should be powered.
1041 */
1042 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1043 {
1044 int in, out;
1045
1046 DAPM_UPDATE_STAT(w, power_checks);
1047
1048 in = is_connected_input_ep(w, NULL);
1049 dapm_clear_walk(w->dapm);
1050 out = is_connected_output_ep(w, NULL);
1051 dapm_clear_walk(w->dapm);
1052 return out != 0 && in != 0;
1053 }
1054
1055 static int dapm_dai_check_power(struct snd_soc_dapm_widget *w)
1056 {
1057 DAPM_UPDATE_STAT(w, power_checks);
1058
1059 if (w->active)
1060 return w->active;
1061
1062 return dapm_generic_check_power(w);
1063 }
1064
1065 /* Check to see if an ADC has power */
1066 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
1067 {
1068 int in;
1069
1070 DAPM_UPDATE_STAT(w, power_checks);
1071
1072 if (w->active) {
1073 in = is_connected_input_ep(w, NULL);
1074 dapm_clear_walk(w->dapm);
1075 return in != 0;
1076 } else {
1077 return dapm_generic_check_power(w);
1078 }
1079 }
1080
1081 /* Check to see if a DAC has power */
1082 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
1083 {
1084 int out;
1085
1086 DAPM_UPDATE_STAT(w, power_checks);
1087
1088 if (w->active) {
1089 out = is_connected_output_ep(w, NULL);
1090 dapm_clear_walk(w->dapm);
1091 return out != 0;
1092 } else {
1093 return dapm_generic_check_power(w);
1094 }
1095 }
1096
1097 /* Check to see if a power supply is needed */
1098 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1099 {
1100 struct snd_soc_dapm_path *path;
1101
1102 DAPM_UPDATE_STAT(w, power_checks);
1103
1104 /* Check if one of our outputs is connected */
1105 list_for_each_entry(path, &w->sinks, list_source) {
1106 DAPM_UPDATE_STAT(w, neighbour_checks);
1107
1108 if (path->weak)
1109 continue;
1110
1111 if (path->connected &&
1112 !path->connected(path->source, path->sink))
1113 continue;
1114
1115 if (!path->sink)
1116 continue;
1117
1118 if (dapm_widget_power_check(path->sink))
1119 return 1;
1120 }
1121
1122 dapm_clear_walk(w->dapm);
1123
1124 return 0;
1125 }
1126
1127 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1128 {
1129 return 1;
1130 }
1131
1132 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1133 struct snd_soc_dapm_widget *b,
1134 bool power_up)
1135 {
1136 int *sort;
1137
1138 if (power_up)
1139 sort = dapm_up_seq;
1140 else
1141 sort = dapm_down_seq;
1142
1143 if (sort[a->id] != sort[b->id])
1144 return sort[a->id] - sort[b->id];
1145 if (a->subseq != b->subseq) {
1146 if (power_up)
1147 return a->subseq - b->subseq;
1148 else
1149 return b->subseq - a->subseq;
1150 }
1151 if (a->reg != b->reg)
1152 return a->reg - b->reg;
1153 if (a->dapm != b->dapm)
1154 return (unsigned long)a->dapm - (unsigned long)b->dapm;
1155
1156 return 0;
1157 }
1158
1159 /* Insert a widget in order into a DAPM power sequence. */
1160 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1161 struct list_head *list,
1162 bool power_up)
1163 {
1164 struct snd_soc_dapm_widget *w;
1165
1166 list_for_each_entry(w, list, power_list)
1167 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
1168 list_add_tail(&new_widget->power_list, &w->power_list);
1169 return;
1170 }
1171
1172 list_add_tail(&new_widget->power_list, list);
1173 }
1174
1175 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
1176 struct snd_soc_dapm_widget *w, int event)
1177 {
1178 struct snd_soc_card *card = dapm->card;
1179 const char *ev_name;
1180 int power, ret;
1181
1182 switch (event) {
1183 case SND_SOC_DAPM_PRE_PMU:
1184 ev_name = "PRE_PMU";
1185 power = 1;
1186 break;
1187 case SND_SOC_DAPM_POST_PMU:
1188 ev_name = "POST_PMU";
1189 power = 1;
1190 break;
1191 case SND_SOC_DAPM_PRE_PMD:
1192 ev_name = "PRE_PMD";
1193 power = 0;
1194 break;
1195 case SND_SOC_DAPM_POST_PMD:
1196 ev_name = "POST_PMD";
1197 power = 0;
1198 break;
1199 default:
1200 BUG();
1201 return;
1202 }
1203
1204 if (w->power != power)
1205 return;
1206
1207 if (w->event && (w->event_flags & event)) {
1208 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
1209 w->name, ev_name);
1210 trace_snd_soc_dapm_widget_event_start(w, event);
1211 ret = w->event(w, NULL, event);
1212 trace_snd_soc_dapm_widget_event_done(w, event);
1213 if (ret < 0)
1214 pr_err("%s: %s event failed: %d\n",
1215 ev_name, w->name, ret);
1216 }
1217 }
1218
1219 /* Apply the coalesced changes from a DAPM sequence */
1220 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
1221 struct list_head *pending)
1222 {
1223 struct snd_soc_card *card = dapm->card;
1224 struct snd_soc_dapm_widget *w;
1225 int reg, power;
1226 unsigned int value = 0;
1227 unsigned int mask = 0;
1228 unsigned int cur_mask;
1229
1230 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1231 power_list)->reg;
1232
1233 list_for_each_entry(w, pending, power_list) {
1234 cur_mask = 1 << w->shift;
1235 BUG_ON(reg != w->reg);
1236
1237 if (w->invert)
1238 power = !w->power;
1239 else
1240 power = w->power;
1241
1242 mask |= cur_mask;
1243 if (power)
1244 value |= cur_mask;
1245
1246 pop_dbg(dapm->dev, card->pop_time,
1247 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1248 w->name, reg, value, mask);
1249
1250 /* Check for events */
1251 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1252 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
1253 }
1254
1255 if (reg >= 0) {
1256 /* Any widget will do, they should all be updating the
1257 * same register.
1258 */
1259 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1260 power_list);
1261
1262 pop_dbg(dapm->dev, card->pop_time,
1263 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1264 value, mask, reg, card->pop_time);
1265 pop_wait(card->pop_time);
1266 soc_widget_update_bits_locked(w, reg, mask, value);
1267 }
1268
1269 list_for_each_entry(w, pending, power_list) {
1270 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1271 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1272 }
1273 }
1274
1275 /* Apply a DAPM power sequence.
1276 *
1277 * We walk over a pre-sorted list of widgets to apply power to. In
1278 * order to minimise the number of writes to the device required
1279 * multiple widgets will be updated in a single write where possible.
1280 * Currently anything that requires more than a single write is not
1281 * handled.
1282 */
1283 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1284 struct list_head *list, int event, bool power_up)
1285 {
1286 struct snd_soc_dapm_widget *w, *n;
1287 LIST_HEAD(pending);
1288 int cur_sort = -1;
1289 int cur_subseq = -1;
1290 int cur_reg = SND_SOC_NOPM;
1291 struct snd_soc_dapm_context *cur_dapm = NULL;
1292 int ret, i;
1293 int *sort;
1294
1295 if (power_up)
1296 sort = dapm_up_seq;
1297 else
1298 sort = dapm_down_seq;
1299
1300 list_for_each_entry_safe(w, n, list, power_list) {
1301 ret = 0;
1302
1303 /* Do we need to apply any queued changes? */
1304 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1305 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1306 if (!list_empty(&pending))
1307 dapm_seq_run_coalesced(cur_dapm, &pending);
1308
1309 if (cur_dapm && cur_dapm->seq_notifier) {
1310 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1311 if (sort[i] == cur_sort)
1312 cur_dapm->seq_notifier(cur_dapm,
1313 i,
1314 cur_subseq);
1315 }
1316
1317 INIT_LIST_HEAD(&pending);
1318 cur_sort = -1;
1319 cur_subseq = INT_MIN;
1320 cur_reg = SND_SOC_NOPM;
1321 cur_dapm = NULL;
1322 }
1323
1324 switch (w->id) {
1325 case snd_soc_dapm_pre:
1326 if (!w->event)
1327 list_for_each_entry_safe_continue(w, n, list,
1328 power_list);
1329
1330 if (event == SND_SOC_DAPM_STREAM_START)
1331 ret = w->event(w,
1332 NULL, SND_SOC_DAPM_PRE_PMU);
1333 else if (event == SND_SOC_DAPM_STREAM_STOP)
1334 ret = w->event(w,
1335 NULL, SND_SOC_DAPM_PRE_PMD);
1336 break;
1337
1338 case snd_soc_dapm_post:
1339 if (!w->event)
1340 list_for_each_entry_safe_continue(w, n, list,
1341 power_list);
1342
1343 if (event == SND_SOC_DAPM_STREAM_START)
1344 ret = w->event(w,
1345 NULL, SND_SOC_DAPM_POST_PMU);
1346 else if (event == SND_SOC_DAPM_STREAM_STOP)
1347 ret = w->event(w,
1348 NULL, SND_SOC_DAPM_POST_PMD);
1349 break;
1350
1351 default:
1352 /* Queue it up for application */
1353 cur_sort = sort[w->id];
1354 cur_subseq = w->subseq;
1355 cur_reg = w->reg;
1356 cur_dapm = w->dapm;
1357 list_move(&w->power_list, &pending);
1358 break;
1359 }
1360
1361 if (ret < 0)
1362 dev_err(w->dapm->dev,
1363 "Failed to apply widget power: %d\n", ret);
1364 }
1365
1366 if (!list_empty(&pending))
1367 dapm_seq_run_coalesced(cur_dapm, &pending);
1368
1369 if (cur_dapm && cur_dapm->seq_notifier) {
1370 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1371 if (sort[i] == cur_sort)
1372 cur_dapm->seq_notifier(cur_dapm,
1373 i, cur_subseq);
1374 }
1375 }
1376
1377 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1378 {
1379 struct snd_soc_dapm_update *update = dapm->update;
1380 struct snd_soc_dapm_widget *w;
1381 int ret;
1382
1383 if (!update)
1384 return;
1385
1386 w = update->widget;
1387
1388 if (w->event &&
1389 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1390 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1391 if (ret != 0)
1392 pr_err("%s DAPM pre-event failed: %d\n",
1393 w->name, ret);
1394 }
1395
1396 ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
1397 update->val);
1398 if (ret < 0)
1399 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1400
1401 if (w->event &&
1402 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1403 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1404 if (ret != 0)
1405 pr_err("%s DAPM post-event failed: %d\n",
1406 w->name, ret);
1407 }
1408 }
1409
1410 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1411 * they're changing state.
1412 */
1413 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1414 {
1415 struct snd_soc_dapm_context *d = data;
1416 int ret;
1417
1418 /* If we're off and we're not supposed to be go into STANDBY */
1419 if (d->bias_level == SND_SOC_BIAS_OFF &&
1420 d->target_bias_level != SND_SOC_BIAS_OFF) {
1421 if (d->dev)
1422 pm_runtime_get_sync(d->dev);
1423
1424 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1425 if (ret != 0)
1426 dev_err(d->dev,
1427 "Failed to turn on bias: %d\n", ret);
1428 }
1429
1430 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1431 if (d->bias_level != d->target_bias_level) {
1432 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1433 if (ret != 0)
1434 dev_err(d->dev,
1435 "Failed to prepare bias: %d\n", ret);
1436 }
1437 }
1438
1439 /* Async callback run prior to DAPM sequences - brings to their final
1440 * state.
1441 */
1442 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1443 {
1444 struct snd_soc_dapm_context *d = data;
1445 int ret;
1446
1447 /* If we just powered the last thing off drop to standby bias */
1448 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1449 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1450 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1451 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1452 if (ret != 0)
1453 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1454 ret);
1455 }
1456
1457 /* If we're in standby and can support bias off then do that */
1458 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1459 d->target_bias_level == SND_SOC_BIAS_OFF) {
1460 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1461 if (ret != 0)
1462 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1463
1464 if (d->dev)
1465 pm_runtime_put(d->dev);
1466 }
1467
1468 /* If we just powered up then move to active bias */
1469 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1470 d->target_bias_level == SND_SOC_BIAS_ON) {
1471 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1472 if (ret != 0)
1473 dev_err(d->dev, "Failed to apply active bias: %d\n",
1474 ret);
1475 }
1476 }
1477
1478 static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1479 bool power, bool connect)
1480 {
1481 /* If a connection is being made or broken then that update
1482 * will have marked the peer dirty, otherwise the widgets are
1483 * not connected and this update has no impact. */
1484 if (!connect)
1485 return;
1486
1487 /* If the peer is already in the state we're moving to then we
1488 * won't have an impact on it. */
1489 if (power != peer->power)
1490 dapm_mark_dirty(peer, "peer state change");
1491 }
1492
1493 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1494 struct list_head *up_list,
1495 struct list_head *down_list)
1496 {
1497 struct snd_soc_dapm_path *path;
1498
1499 if (w->power == power)
1500 return;
1501
1502 trace_snd_soc_dapm_widget_power(w, power);
1503
1504 /* If we changed our power state perhaps our neigbours changed
1505 * also.
1506 */
1507 list_for_each_entry(path, &w->sources, list_sink) {
1508 if (path->source) {
1509 dapm_widget_set_peer_power(path->source, power,
1510 path->connect);
1511 }
1512 }
1513 switch (w->id) {
1514 case snd_soc_dapm_supply:
1515 case snd_soc_dapm_regulator_supply:
1516 case snd_soc_dapm_clock_supply:
1517 /* Supplies can't affect their outputs, only their inputs */
1518 break;
1519 default:
1520 list_for_each_entry(path, &w->sinks, list_source) {
1521 if (path->sink) {
1522 dapm_widget_set_peer_power(path->sink, power,
1523 path->connect);
1524 }
1525 }
1526 break;
1527 }
1528
1529 if (power)
1530 dapm_seq_insert(w, up_list, true);
1531 else
1532 dapm_seq_insert(w, down_list, false);
1533
1534 w->power = power;
1535 }
1536
1537 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1538 struct list_head *up_list,
1539 struct list_head *down_list)
1540 {
1541 int power;
1542
1543 switch (w->id) {
1544 case snd_soc_dapm_pre:
1545 dapm_seq_insert(w, down_list, false);
1546 break;
1547 case snd_soc_dapm_post:
1548 dapm_seq_insert(w, up_list, true);
1549 break;
1550
1551 default:
1552 power = dapm_widget_power_check(w);
1553
1554 dapm_widget_set_power(w, power, up_list, down_list);
1555 break;
1556 }
1557 }
1558
1559 /*
1560 * Scan each dapm widget for complete audio path.
1561 * A complete path is a route that has valid endpoints i.e.:-
1562 *
1563 * o DAC to output pin.
1564 * o Input Pin to ADC.
1565 * o Input pin to Output pin (bypass, sidetone)
1566 * o DAC to ADC (loopback).
1567 */
1568 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1569 {
1570 struct snd_soc_card *card = dapm->card;
1571 struct snd_soc_dapm_widget *w;
1572 struct snd_soc_dapm_context *d;
1573 LIST_HEAD(up_list);
1574 LIST_HEAD(down_list);
1575 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
1576 enum snd_soc_bias_level bias;
1577
1578 trace_snd_soc_dapm_start(card);
1579
1580 list_for_each_entry(d, &card->dapm_list, list) {
1581 if (d->idle_bias_off)
1582 d->target_bias_level = SND_SOC_BIAS_OFF;
1583 else
1584 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1585 }
1586
1587 dapm_reset(card);
1588
1589 /* Check which widgets we need to power and store them in
1590 * lists indicating if they should be powered up or down. We
1591 * only check widgets that have been flagged as dirty but note
1592 * that new widgets may be added to the dirty list while we
1593 * iterate.
1594 */
1595 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1596 dapm_power_one_widget(w, &up_list, &down_list);
1597 }
1598
1599 list_for_each_entry(w, &card->widgets, list) {
1600 switch (w->id) {
1601 case snd_soc_dapm_pre:
1602 case snd_soc_dapm_post:
1603 /* These widgets always need to be powered */
1604 break;
1605 default:
1606 list_del_init(&w->dirty);
1607 break;
1608 }
1609
1610 if (w->power) {
1611 d = w->dapm;
1612
1613 /* Supplies and micbiases only bring the
1614 * context up to STANDBY as unless something
1615 * else is active and passing audio they
1616 * generally don't require full power. Signal
1617 * generators are virtual pins and have no
1618 * power impact themselves.
1619 */
1620 switch (w->id) {
1621 case snd_soc_dapm_siggen:
1622 break;
1623 case snd_soc_dapm_supply:
1624 case snd_soc_dapm_regulator_supply:
1625 case snd_soc_dapm_clock_supply:
1626 case snd_soc_dapm_micbias:
1627 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1628 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1629 break;
1630 default:
1631 d->target_bias_level = SND_SOC_BIAS_ON;
1632 break;
1633 }
1634 }
1635
1636 }
1637
1638 /* Force all contexts in the card to the same bias state if
1639 * they're not ground referenced.
1640 */
1641 bias = SND_SOC_BIAS_OFF;
1642 list_for_each_entry(d, &card->dapm_list, list)
1643 if (d->target_bias_level > bias)
1644 bias = d->target_bias_level;
1645 list_for_each_entry(d, &card->dapm_list, list)
1646 if (!d->idle_bias_off)
1647 d->target_bias_level = bias;
1648
1649 trace_snd_soc_dapm_walk_done(card);
1650
1651 /* Run all the bias changes in parallel */
1652 list_for_each_entry(d, &dapm->card->dapm_list, list)
1653 async_schedule_domain(dapm_pre_sequence_async, d,
1654 &async_domain);
1655 async_synchronize_full_domain(&async_domain);
1656
1657 /* Power down widgets first; try to avoid amplifying pops. */
1658 dapm_seq_run(dapm, &down_list, event, false);
1659
1660 dapm_widget_update(dapm);
1661
1662 /* Now power up. */
1663 dapm_seq_run(dapm, &up_list, event, true);
1664
1665 /* Run all the bias changes in parallel */
1666 list_for_each_entry(d, &dapm->card->dapm_list, list)
1667 async_schedule_domain(dapm_post_sequence_async, d,
1668 &async_domain);
1669 async_synchronize_full_domain(&async_domain);
1670
1671 /* do we need to notify any clients that DAPM event is complete */
1672 list_for_each_entry(d, &card->dapm_list, list) {
1673 if (d->stream_event)
1674 d->stream_event(d, event);
1675 }
1676
1677 pop_dbg(dapm->dev, card->pop_time,
1678 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1679 pop_wait(card->pop_time);
1680
1681 trace_snd_soc_dapm_done(card);
1682
1683 return 0;
1684 }
1685
1686 #ifdef CONFIG_DEBUG_FS
1687 static ssize_t dapm_widget_power_read_file(struct file *file,
1688 char __user *user_buf,
1689 size_t count, loff_t *ppos)
1690 {
1691 struct snd_soc_dapm_widget *w = file->private_data;
1692 char *buf;
1693 int in, out;
1694 ssize_t ret;
1695 struct snd_soc_dapm_path *p = NULL;
1696
1697 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1698 if (!buf)
1699 return -ENOMEM;
1700
1701 in = is_connected_input_ep(w, NULL);
1702 dapm_clear_walk(w->dapm);
1703 out = is_connected_output_ep(w, NULL);
1704 dapm_clear_walk(w->dapm);
1705
1706 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1707 w->name, w->power ? "On" : "Off",
1708 w->force ? " (forced)" : "", in, out);
1709
1710 if (w->reg >= 0)
1711 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1712 " - R%d(0x%x) bit %d",
1713 w->reg, w->reg, w->shift);
1714
1715 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1716
1717 if (w->sname)
1718 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1719 w->sname,
1720 w->active ? "active" : "inactive");
1721
1722 list_for_each_entry(p, &w->sources, list_sink) {
1723 if (p->connected && !p->connected(w, p->sink))
1724 continue;
1725
1726 if (p->connect)
1727 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1728 " in \"%s\" \"%s\"\n",
1729 p->name ? p->name : "static",
1730 p->source->name);
1731 }
1732 list_for_each_entry(p, &w->sinks, list_source) {
1733 if (p->connected && !p->connected(w, p->sink))
1734 continue;
1735
1736 if (p->connect)
1737 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1738 " out \"%s\" \"%s\"\n",
1739 p->name ? p->name : "static",
1740 p->sink->name);
1741 }
1742
1743 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1744
1745 kfree(buf);
1746 return ret;
1747 }
1748
1749 static const struct file_operations dapm_widget_power_fops = {
1750 .open = simple_open,
1751 .read = dapm_widget_power_read_file,
1752 .llseek = default_llseek,
1753 };
1754
1755 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1756 size_t count, loff_t *ppos)
1757 {
1758 struct snd_soc_dapm_context *dapm = file->private_data;
1759 char *level;
1760
1761 switch (dapm->bias_level) {
1762 case SND_SOC_BIAS_ON:
1763 level = "On\n";
1764 break;
1765 case SND_SOC_BIAS_PREPARE:
1766 level = "Prepare\n";
1767 break;
1768 case SND_SOC_BIAS_STANDBY:
1769 level = "Standby\n";
1770 break;
1771 case SND_SOC_BIAS_OFF:
1772 level = "Off\n";
1773 break;
1774 default:
1775 BUG();
1776 level = "Unknown\n";
1777 break;
1778 }
1779
1780 return simple_read_from_buffer(user_buf, count, ppos, level,
1781 strlen(level));
1782 }
1783
1784 static const struct file_operations dapm_bias_fops = {
1785 .open = simple_open,
1786 .read = dapm_bias_read_file,
1787 .llseek = default_llseek,
1788 };
1789
1790 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1791 struct dentry *parent)
1792 {
1793 struct dentry *d;
1794
1795 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1796
1797 if (!dapm->debugfs_dapm) {
1798 dev_warn(dapm->dev,
1799 "Failed to create DAPM debugfs directory\n");
1800 return;
1801 }
1802
1803 d = debugfs_create_file("bias_level", 0444,
1804 dapm->debugfs_dapm, dapm,
1805 &dapm_bias_fops);
1806 if (!d)
1807 dev_warn(dapm->dev,
1808 "ASoC: Failed to create bias level debugfs file\n");
1809 }
1810
1811 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1812 {
1813 struct snd_soc_dapm_context *dapm = w->dapm;
1814 struct dentry *d;
1815
1816 if (!dapm->debugfs_dapm || !w->name)
1817 return;
1818
1819 d = debugfs_create_file(w->name, 0444,
1820 dapm->debugfs_dapm, w,
1821 &dapm_widget_power_fops);
1822 if (!d)
1823 dev_warn(w->dapm->dev,
1824 "ASoC: Failed to create %s debugfs file\n",
1825 w->name);
1826 }
1827
1828 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1829 {
1830 debugfs_remove_recursive(dapm->debugfs_dapm);
1831 }
1832
1833 #else
1834 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1835 struct dentry *parent)
1836 {
1837 }
1838
1839 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1840 {
1841 }
1842
1843 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1844 {
1845 }
1846
1847 #endif
1848
1849 /* test and update the power status of a mux widget */
1850 static int soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1851 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1852 {
1853 struct snd_soc_dapm_path *path;
1854 int found = 0;
1855
1856 if (widget->id != snd_soc_dapm_mux &&
1857 widget->id != snd_soc_dapm_virt_mux &&
1858 widget->id != snd_soc_dapm_value_mux)
1859 return -ENODEV;
1860
1861 /* find dapm widget path assoc with kcontrol */
1862 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1863 if (path->kcontrol != kcontrol)
1864 continue;
1865
1866 if (!path->name || !e->texts[mux])
1867 continue;
1868
1869 found = 1;
1870 /* we now need to match the string in the enum to the path */
1871 if (!(strcmp(path->name, e->texts[mux]))) {
1872 path->connect = 1; /* new connection */
1873 dapm_mark_dirty(path->source, "mux connection");
1874 } else {
1875 if (path->connect)
1876 dapm_mark_dirty(path->source,
1877 "mux disconnection");
1878 path->connect = 0; /* old connection must be powered down */
1879 }
1880 }
1881
1882 if (found) {
1883 dapm_mark_dirty(widget, "mux change");
1884 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1885 }
1886
1887 return found;
1888 }
1889
1890 int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1891 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1892 {
1893 struct snd_soc_card *card = widget->dapm->card;
1894 int ret;
1895
1896 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1897 ret = soc_dapm_mux_update_power(widget, kcontrol, mux, e);
1898 mutex_unlock(&card->dapm_mutex);
1899 if (ret > 0)
1900 soc_dpcm_runtime_update(widget);
1901 return ret;
1902 }
1903 EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
1904
1905 /* test and update the power status of a mixer or switch widget */
1906 static int soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1907 struct snd_kcontrol *kcontrol, int connect)
1908 {
1909 struct snd_soc_dapm_path *path;
1910 int found = 0;
1911
1912 if (widget->id != snd_soc_dapm_mixer &&
1913 widget->id != snd_soc_dapm_mixer_named_ctl &&
1914 widget->id != snd_soc_dapm_switch)
1915 return -ENODEV;
1916
1917 /* find dapm widget path assoc with kcontrol */
1918 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1919 if (path->kcontrol != kcontrol)
1920 continue;
1921
1922 /* found, now check type */
1923 found = 1;
1924 path->connect = connect;
1925 dapm_mark_dirty(path->source, "mixer connection");
1926 }
1927
1928 if (found) {
1929 dapm_mark_dirty(widget, "mixer update");
1930 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1931 }
1932
1933 return found;
1934 }
1935
1936 int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1937 struct snd_kcontrol *kcontrol, int connect)
1938 {
1939 struct snd_soc_card *card = widget->dapm->card;
1940 int ret;
1941
1942 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1943 ret = soc_dapm_mixer_update_power(widget, kcontrol, connect);
1944 mutex_unlock(&card->dapm_mutex);
1945 if (ret > 0)
1946 soc_dpcm_runtime_update(widget);
1947 return ret;
1948 }
1949 EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
1950
1951 /* show dapm widget status in sys fs */
1952 static ssize_t dapm_widget_show(struct device *dev,
1953 struct device_attribute *attr, char *buf)
1954 {
1955 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
1956 struct snd_soc_codec *codec =rtd->codec;
1957 struct snd_soc_dapm_widget *w;
1958 int count = 0;
1959 char *state = "not set";
1960
1961 list_for_each_entry(w, &codec->card->widgets, list) {
1962 if (w->dapm != &codec->dapm)
1963 continue;
1964
1965 /* only display widgets that burnm power */
1966 switch (w->id) {
1967 case snd_soc_dapm_hp:
1968 case snd_soc_dapm_mic:
1969 case snd_soc_dapm_spk:
1970 case snd_soc_dapm_line:
1971 case snd_soc_dapm_micbias:
1972 case snd_soc_dapm_dac:
1973 case snd_soc_dapm_adc:
1974 case snd_soc_dapm_pga:
1975 case snd_soc_dapm_out_drv:
1976 case snd_soc_dapm_mixer:
1977 case snd_soc_dapm_mixer_named_ctl:
1978 case snd_soc_dapm_supply:
1979 case snd_soc_dapm_regulator_supply:
1980 case snd_soc_dapm_clock_supply:
1981 if (w->name)
1982 count += sprintf(buf + count, "%s: %s\n",
1983 w->name, w->power ? "On":"Off");
1984 break;
1985 default:
1986 break;
1987 }
1988 }
1989
1990 switch (codec->dapm.bias_level) {
1991 case SND_SOC_BIAS_ON:
1992 state = "On";
1993 break;
1994 case SND_SOC_BIAS_PREPARE:
1995 state = "Prepare";
1996 break;
1997 case SND_SOC_BIAS_STANDBY:
1998 state = "Standby";
1999 break;
2000 case SND_SOC_BIAS_OFF:
2001 state = "Off";
2002 break;
2003 }
2004 count += sprintf(buf + count, "PM State: %s\n", state);
2005
2006 return count;
2007 }
2008
2009 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2010
2011 int snd_soc_dapm_sys_add(struct device *dev)
2012 {
2013 return device_create_file(dev, &dev_attr_dapm_widget);
2014 }
2015
2016 static void snd_soc_dapm_sys_remove(struct device *dev)
2017 {
2018 device_remove_file(dev, &dev_attr_dapm_widget);
2019 }
2020
2021 /* free all dapm widgets and resources */
2022 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2023 {
2024 struct snd_soc_dapm_widget *w, *next_w;
2025 struct snd_soc_dapm_path *p, *next_p;
2026
2027 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2028 if (w->dapm != dapm)
2029 continue;
2030 list_del(&w->list);
2031 /*
2032 * remove source and sink paths associated to this widget.
2033 * While removing the path, remove reference to it from both
2034 * source and sink widgets so that path is removed only once.
2035 */
2036 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
2037 list_del(&p->list_sink);
2038 list_del(&p->list_source);
2039 list_del(&p->list);
2040 kfree(p->long_name);
2041 kfree(p);
2042 }
2043 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
2044 list_del(&p->list_sink);
2045 list_del(&p->list_source);
2046 list_del(&p->list);
2047 kfree(p->long_name);
2048 kfree(p);
2049 }
2050 kfree(w->kcontrols);
2051 kfree(w->name);
2052 kfree(w);
2053 }
2054 }
2055
2056 static struct snd_soc_dapm_widget *dapm_find_widget(
2057 struct snd_soc_dapm_context *dapm, const char *pin,
2058 bool search_other_contexts)
2059 {
2060 struct snd_soc_dapm_widget *w;
2061 struct snd_soc_dapm_widget *fallback = NULL;
2062
2063 list_for_each_entry(w, &dapm->card->widgets, list) {
2064 if (!strcmp(w->name, pin)) {
2065 if (w->dapm == dapm)
2066 return w;
2067 else
2068 fallback = w;
2069 }
2070 }
2071
2072 if (search_other_contexts)
2073 return fallback;
2074
2075 return NULL;
2076 }
2077
2078 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2079 const char *pin, int status)
2080 {
2081 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2082
2083 if (!w) {
2084 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2085 return -EINVAL;
2086 }
2087
2088 if (w->connected != status)
2089 dapm_mark_dirty(w, "pin configuration");
2090
2091 w->connected = status;
2092 if (status == 0)
2093 w->force = 0;
2094
2095 return 0;
2096 }
2097
2098 /**
2099 * snd_soc_dapm_sync - scan and power dapm paths
2100 * @dapm: DAPM context
2101 *
2102 * Walks all dapm audio paths and powers widgets according to their
2103 * stream or path usage.
2104 *
2105 * Returns 0 for success.
2106 */
2107 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2108 {
2109 int ret;
2110
2111 /*
2112 * Suppress early reports (eg, jacks syncing their state) to avoid
2113 * silly DAPM runs during card startup.
2114 */
2115 if (!dapm->card || !dapm->card->instantiated)
2116 return 0;
2117
2118 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2119 ret = dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2120 mutex_unlock(&dapm->card->dapm_mutex);
2121 return ret;
2122 }
2123 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2124
2125 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
2126 const struct snd_soc_dapm_route *route)
2127 {
2128 struct snd_soc_dapm_path *path;
2129 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
2130 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
2131 const char *sink;
2132 const char *control = route->control;
2133 const char *source;
2134 char prefixed_sink[80];
2135 char prefixed_source[80];
2136 int ret = 0;
2137
2138 if (dapm->codec && dapm->codec->name_prefix) {
2139 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2140 dapm->codec->name_prefix, route->sink);
2141 sink = prefixed_sink;
2142 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2143 dapm->codec->name_prefix, route->source);
2144 source = prefixed_source;
2145 } else {
2146 sink = route->sink;
2147 source = route->source;
2148 }
2149
2150 /*
2151 * find src and dest widgets over all widgets but favor a widget from
2152 * current DAPM context
2153 */
2154 list_for_each_entry(w, &dapm->card->widgets, list) {
2155 if (!wsink && !(strcmp(w->name, sink))) {
2156 wtsink = w;
2157 if (w->dapm == dapm)
2158 wsink = w;
2159 continue;
2160 }
2161 if (!wsource && !(strcmp(w->name, source))) {
2162 wtsource = w;
2163 if (w->dapm == dapm)
2164 wsource = w;
2165 }
2166 }
2167 /* use widget from another DAPM context if not found from this */
2168 if (!wsink)
2169 wsink = wtsink;
2170 if (!wsource)
2171 wsource = wtsource;
2172
2173 if (wsource == NULL || wsink == NULL)
2174 return -ENODEV;
2175
2176 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2177 if (!path)
2178 return -ENOMEM;
2179
2180 path->source = wsource;
2181 path->sink = wsink;
2182 path->connected = route->connected;
2183 INIT_LIST_HEAD(&path->list);
2184 INIT_LIST_HEAD(&path->list_source);
2185 INIT_LIST_HEAD(&path->list_sink);
2186
2187 /* check for external widgets */
2188 if (wsink->id == snd_soc_dapm_input) {
2189 if (wsource->id == snd_soc_dapm_micbias ||
2190 wsource->id == snd_soc_dapm_mic ||
2191 wsource->id == snd_soc_dapm_line ||
2192 wsource->id == snd_soc_dapm_output)
2193 wsink->ext = 1;
2194 }
2195 if (wsource->id == snd_soc_dapm_output) {
2196 if (wsink->id == snd_soc_dapm_spk ||
2197 wsink->id == snd_soc_dapm_hp ||
2198 wsink->id == snd_soc_dapm_line ||
2199 wsink->id == snd_soc_dapm_input)
2200 wsource->ext = 1;
2201 }
2202
2203 /* connect static paths */
2204 if (control == NULL) {
2205 list_add(&path->list, &dapm->card->paths);
2206 list_add(&path->list_sink, &wsink->sources);
2207 list_add(&path->list_source, &wsource->sinks);
2208 path->connect = 1;
2209 return 0;
2210 }
2211
2212 /* connect dynamic paths */
2213 switch (wsink->id) {
2214 case snd_soc_dapm_adc:
2215 case snd_soc_dapm_dac:
2216 case snd_soc_dapm_pga:
2217 case snd_soc_dapm_out_drv:
2218 case snd_soc_dapm_input:
2219 case snd_soc_dapm_output:
2220 case snd_soc_dapm_siggen:
2221 case snd_soc_dapm_micbias:
2222 case snd_soc_dapm_vmid:
2223 case snd_soc_dapm_pre:
2224 case snd_soc_dapm_post:
2225 case snd_soc_dapm_supply:
2226 case snd_soc_dapm_regulator_supply:
2227 case snd_soc_dapm_clock_supply:
2228 case snd_soc_dapm_aif_in:
2229 case snd_soc_dapm_aif_out:
2230 case snd_soc_dapm_dai:
2231 case snd_soc_dapm_dai_link:
2232 list_add(&path->list, &dapm->card->paths);
2233 list_add(&path->list_sink, &wsink->sources);
2234 list_add(&path->list_source, &wsource->sinks);
2235 path->connect = 1;
2236 return 0;
2237 case snd_soc_dapm_mux:
2238 case snd_soc_dapm_virt_mux:
2239 case snd_soc_dapm_value_mux:
2240 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
2241 &wsink->kcontrol_news[0]);
2242 if (ret != 0)
2243 goto err;
2244 break;
2245 case snd_soc_dapm_switch:
2246 case snd_soc_dapm_mixer:
2247 case snd_soc_dapm_mixer_named_ctl:
2248 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2249 if (ret != 0)
2250 goto err;
2251 break;
2252 case snd_soc_dapm_hp:
2253 case snd_soc_dapm_mic:
2254 case snd_soc_dapm_line:
2255 case snd_soc_dapm_spk:
2256 list_add(&path->list, &dapm->card->paths);
2257 list_add(&path->list_sink, &wsink->sources);
2258 list_add(&path->list_source, &wsource->sinks);
2259 path->connect = 0;
2260 return 0;
2261 }
2262
2263 dapm_mark_dirty(wsource, "Route added");
2264 dapm_mark_dirty(wsink, "Route added");
2265
2266 return 0;
2267
2268 err:
2269 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
2270 source, control, sink);
2271 kfree(path);
2272 return ret;
2273 }
2274
2275 static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2276 const struct snd_soc_dapm_route *route)
2277 {
2278 struct snd_soc_dapm_path *path, *p;
2279 const char *sink;
2280 const char *source;
2281 char prefixed_sink[80];
2282 char prefixed_source[80];
2283
2284 if (route->control) {
2285 dev_err(dapm->dev,
2286 "Removal of routes with controls not supported\n");
2287 return -EINVAL;
2288 }
2289
2290 if (dapm->codec && dapm->codec->name_prefix) {
2291 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2292 dapm->codec->name_prefix, route->sink);
2293 sink = prefixed_sink;
2294 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2295 dapm->codec->name_prefix, route->source);
2296 source = prefixed_source;
2297 } else {
2298 sink = route->sink;
2299 source = route->source;
2300 }
2301
2302 path = NULL;
2303 list_for_each_entry(p, &dapm->card->paths, list) {
2304 if (strcmp(p->source->name, source) != 0)
2305 continue;
2306 if (strcmp(p->sink->name, sink) != 0)
2307 continue;
2308 path = p;
2309 break;
2310 }
2311
2312 if (path) {
2313 dapm_mark_dirty(path->source, "Route removed");
2314 dapm_mark_dirty(path->sink, "Route removed");
2315
2316 list_del(&path->list);
2317 list_del(&path->list_sink);
2318 list_del(&path->list_source);
2319 kfree(path);
2320 } else {
2321 dev_warn(dapm->dev, "Route %s->%s does not exist\n",
2322 source, sink);
2323 }
2324
2325 return 0;
2326 }
2327
2328 /**
2329 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
2330 * @dapm: DAPM context
2331 * @route: audio routes
2332 * @num: number of routes
2333 *
2334 * Connects 2 dapm widgets together via a named audio path. The sink is
2335 * the widget receiving the audio signal, whilst the source is the sender
2336 * of the audio signal.
2337 *
2338 * Returns 0 for success else error. On error all resources can be freed
2339 * with a call to snd_soc_card_free().
2340 */
2341 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
2342 const struct snd_soc_dapm_route *route, int num)
2343 {
2344 int i, r, ret = 0;
2345
2346 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2347 for (i = 0; i < num; i++) {
2348 r = snd_soc_dapm_add_route(dapm, route);
2349 if (r < 0) {
2350 dev_err(dapm->dev, "Failed to add route %s->%s\n",
2351 route->source, route->sink);
2352 ret = r;
2353 }
2354 route++;
2355 }
2356 mutex_unlock(&dapm->card->dapm_mutex);
2357
2358 return ret;
2359 }
2360 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2361
2362 /**
2363 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2364 * @dapm: DAPM context
2365 * @route: audio routes
2366 * @num: number of routes
2367 *
2368 * Removes routes from the DAPM context.
2369 */
2370 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2371 const struct snd_soc_dapm_route *route, int num)
2372 {
2373 int i, ret = 0;
2374
2375 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2376 for (i = 0; i < num; i++) {
2377 snd_soc_dapm_del_route(dapm, route);
2378 route++;
2379 }
2380 mutex_unlock(&dapm->card->dapm_mutex);
2381
2382 return ret;
2383 }
2384 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2385
2386 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2387 const struct snd_soc_dapm_route *route)
2388 {
2389 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2390 route->source,
2391 true);
2392 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2393 route->sink,
2394 true);
2395 struct snd_soc_dapm_path *path;
2396 int count = 0;
2397
2398 if (!source) {
2399 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
2400 route->source);
2401 return -ENODEV;
2402 }
2403
2404 if (!sink) {
2405 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
2406 route->sink);
2407 return -ENODEV;
2408 }
2409
2410 if (route->control || route->connected)
2411 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
2412 route->source, route->sink);
2413
2414 list_for_each_entry(path, &source->sinks, list_source) {
2415 if (path->sink == sink) {
2416 path->weak = 1;
2417 count++;
2418 }
2419 }
2420
2421 if (count == 0)
2422 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
2423 route->source, route->sink);
2424 if (count > 1)
2425 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
2426 count, route->source, route->sink);
2427
2428 return 0;
2429 }
2430
2431 /**
2432 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2433 * @dapm: DAPM context
2434 * @route: audio routes
2435 * @num: number of routes
2436 *
2437 * Mark existing routes matching those specified in the passed array
2438 * as being weak, meaning that they are ignored for the purpose of
2439 * power decisions. The main intended use case is for sidetone paths
2440 * which couple audio between other independent paths if they are both
2441 * active in order to make the combination work better at the user
2442 * level but which aren't intended to be "used".
2443 *
2444 * Note that CODEC drivers should not use this as sidetone type paths
2445 * can frequently also be used as bypass paths.
2446 */
2447 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2448 const struct snd_soc_dapm_route *route, int num)
2449 {
2450 int i, err;
2451 int ret = 0;
2452
2453 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2454 for (i = 0; i < num; i++) {
2455 err = snd_soc_dapm_weak_route(dapm, route);
2456 if (err)
2457 ret = err;
2458 route++;
2459 }
2460 mutex_unlock(&dapm->card->dapm_mutex);
2461
2462 return ret;
2463 }
2464 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2465
2466 /**
2467 * snd_soc_dapm_new_widgets - add new dapm widgets
2468 * @dapm: DAPM context
2469 *
2470 * Checks the codec for any new dapm widgets and creates them if found.
2471 *
2472 * Returns 0 for success.
2473 */
2474 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2475 {
2476 struct snd_soc_dapm_widget *w;
2477 unsigned int val;
2478
2479 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2480
2481 list_for_each_entry(w, &dapm->card->widgets, list)
2482 {
2483 if (w->new)
2484 continue;
2485
2486 if (w->num_kcontrols) {
2487 w->kcontrols = kzalloc(w->num_kcontrols *
2488 sizeof(struct snd_kcontrol *),
2489 GFP_KERNEL);
2490 if (!w->kcontrols) {
2491 mutex_unlock(&dapm->card->dapm_mutex);
2492 return -ENOMEM;
2493 }
2494 }
2495
2496 switch(w->id) {
2497 case snd_soc_dapm_switch:
2498 case snd_soc_dapm_mixer:
2499 case snd_soc_dapm_mixer_named_ctl:
2500 dapm_new_mixer(w);
2501 break;
2502 case snd_soc_dapm_mux:
2503 case snd_soc_dapm_virt_mux:
2504 case snd_soc_dapm_value_mux:
2505 dapm_new_mux(w);
2506 break;
2507 case snd_soc_dapm_pga:
2508 case snd_soc_dapm_out_drv:
2509 dapm_new_pga(w);
2510 break;
2511 default:
2512 break;
2513 }
2514
2515 /* Read the initial power state from the device */
2516 if (w->reg >= 0) {
2517 val = soc_widget_read(w, w->reg);
2518 val &= 1 << w->shift;
2519 if (w->invert)
2520 val = !val;
2521
2522 if (val)
2523 w->power = 1;
2524 }
2525
2526 w->new = 1;
2527
2528 dapm_mark_dirty(w, "new widget");
2529 dapm_debugfs_add_widget(w);
2530 }
2531
2532 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2533 mutex_unlock(&dapm->card->dapm_mutex);
2534 return 0;
2535 }
2536 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2537
2538 /**
2539 * snd_soc_dapm_get_volsw - dapm mixer get callback
2540 * @kcontrol: mixer control
2541 * @ucontrol: control element information
2542 *
2543 * Callback to get the value of a dapm mixer control.
2544 *
2545 * Returns 0 for success.
2546 */
2547 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2548 struct snd_ctl_elem_value *ucontrol)
2549 {
2550 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2551 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2552 struct soc_mixer_control *mc =
2553 (struct soc_mixer_control *)kcontrol->private_value;
2554 unsigned int reg = mc->reg;
2555 unsigned int shift = mc->shift;
2556 int max = mc->max;
2557 unsigned int mask = (1 << fls(max)) - 1;
2558 unsigned int invert = mc->invert;
2559
2560 if (snd_soc_volsw_is_stereo(mc))
2561 dev_warn(widget->dapm->dev,
2562 "Control '%s' is stereo, which is not supported\n",
2563 kcontrol->id.name);
2564
2565 ucontrol->value.integer.value[0] =
2566 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2567 if (invert)
2568 ucontrol->value.integer.value[0] =
2569 max - ucontrol->value.integer.value[0];
2570
2571 return 0;
2572 }
2573 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2574
2575 /**
2576 * snd_soc_dapm_put_volsw - dapm mixer set callback
2577 * @kcontrol: mixer control
2578 * @ucontrol: control element information
2579 *
2580 * Callback to set the value of a dapm mixer control.
2581 *
2582 * Returns 0 for success.
2583 */
2584 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2585 struct snd_ctl_elem_value *ucontrol)
2586 {
2587 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2588 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2589 struct snd_soc_codec *codec = widget->codec;
2590 struct snd_soc_card *card = codec->card;
2591 struct soc_mixer_control *mc =
2592 (struct soc_mixer_control *)kcontrol->private_value;
2593 unsigned int reg = mc->reg;
2594 unsigned int shift = mc->shift;
2595 int max = mc->max;
2596 unsigned int mask = (1 << fls(max)) - 1;
2597 unsigned int invert = mc->invert;
2598 unsigned int val;
2599 int connect, change;
2600 struct snd_soc_dapm_update update;
2601 int wi;
2602
2603 if (snd_soc_volsw_is_stereo(mc))
2604 dev_warn(widget->dapm->dev,
2605 "Control '%s' is stereo, which is not supported\n",
2606 kcontrol->id.name);
2607
2608 val = (ucontrol->value.integer.value[0] & mask);
2609 connect = !!val;
2610
2611 if (invert)
2612 val = max - val;
2613 mask = mask << shift;
2614 val = val << shift;
2615
2616 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2617
2618 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2619 if (change) {
2620 for (wi = 0; wi < wlist->num_widgets; wi++) {
2621 widget = wlist->widgets[wi];
2622
2623 widget->value = val;
2624
2625 update.kcontrol = kcontrol;
2626 update.widget = widget;
2627 update.reg = reg;
2628 update.mask = mask;
2629 update.val = val;
2630 widget->dapm->update = &update;
2631
2632 soc_dapm_mixer_update_power(widget, kcontrol, connect);
2633
2634 widget->dapm->update = NULL;
2635 }
2636 }
2637
2638 mutex_unlock(&card->dapm_mutex);
2639 return 0;
2640 }
2641 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2642
2643 /**
2644 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2645 * @kcontrol: mixer control
2646 * @ucontrol: control element information
2647 *
2648 * Callback to get the value of a dapm enumerated double mixer control.
2649 *
2650 * Returns 0 for success.
2651 */
2652 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2653 struct snd_ctl_elem_value *ucontrol)
2654 {
2655 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2656 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2657 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2658 unsigned int val, bitmask;
2659
2660 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2661 ;
2662 val = snd_soc_read(widget->codec, e->reg);
2663 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2664 if (e->shift_l != e->shift_r)
2665 ucontrol->value.enumerated.item[1] =
2666 (val >> e->shift_r) & (bitmask - 1);
2667
2668 return 0;
2669 }
2670 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2671
2672 /**
2673 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2674 * @kcontrol: mixer control
2675 * @ucontrol: control element information
2676 *
2677 * Callback to set the value of a dapm enumerated double mixer control.
2678 *
2679 * Returns 0 for success.
2680 */
2681 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2682 struct snd_ctl_elem_value *ucontrol)
2683 {
2684 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2685 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2686 struct snd_soc_codec *codec = widget->codec;
2687 struct snd_soc_card *card = codec->card;
2688 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2689 unsigned int val, mux, change;
2690 unsigned int mask, bitmask;
2691 struct snd_soc_dapm_update update;
2692 int wi;
2693
2694 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2695 ;
2696 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2697 return -EINVAL;
2698 mux = ucontrol->value.enumerated.item[0];
2699 val = mux << e->shift_l;
2700 mask = (bitmask - 1) << e->shift_l;
2701 if (e->shift_l != e->shift_r) {
2702 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2703 return -EINVAL;
2704 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2705 mask |= (bitmask - 1) << e->shift_r;
2706 }
2707
2708 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2709
2710 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2711 if (change) {
2712 for (wi = 0; wi < wlist->num_widgets; wi++) {
2713 widget = wlist->widgets[wi];
2714
2715 widget->value = val;
2716
2717 update.kcontrol = kcontrol;
2718 update.widget = widget;
2719 update.reg = e->reg;
2720 update.mask = mask;
2721 update.val = val;
2722 widget->dapm->update = &update;
2723
2724 soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2725
2726 widget->dapm->update = NULL;
2727 }
2728 }
2729
2730 mutex_unlock(&card->dapm_mutex);
2731 return change;
2732 }
2733 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2734
2735 /**
2736 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2737 * @kcontrol: mixer control
2738 * @ucontrol: control element information
2739 *
2740 * Returns 0 for success.
2741 */
2742 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2743 struct snd_ctl_elem_value *ucontrol)
2744 {
2745 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2746 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2747
2748 ucontrol->value.enumerated.item[0] = widget->value;
2749
2750 return 0;
2751 }
2752 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2753
2754 /**
2755 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2756 * @kcontrol: mixer control
2757 * @ucontrol: control element information
2758 *
2759 * Returns 0 for success.
2760 */
2761 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2762 struct snd_ctl_elem_value *ucontrol)
2763 {
2764 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2765 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2766 struct snd_soc_codec *codec = widget->codec;
2767 struct snd_soc_card *card = codec->card;
2768 struct soc_enum *e =
2769 (struct soc_enum *)kcontrol->private_value;
2770 int change;
2771 int ret = 0;
2772 int wi;
2773
2774 if (ucontrol->value.enumerated.item[0] >= e->max)
2775 return -EINVAL;
2776
2777 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2778
2779 change = widget->value != ucontrol->value.enumerated.item[0];
2780 if (change) {
2781 for (wi = 0; wi < wlist->num_widgets; wi++) {
2782 widget = wlist->widgets[wi];
2783
2784 widget->value = ucontrol->value.enumerated.item[0];
2785
2786 soc_dapm_mux_update_power(widget, kcontrol, widget->value, e);
2787 }
2788 }
2789
2790 mutex_unlock(&card->dapm_mutex);
2791 return ret;
2792 }
2793 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2794
2795 /**
2796 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2797 * callback
2798 * @kcontrol: mixer control
2799 * @ucontrol: control element information
2800 *
2801 * Callback to get the value of a dapm semi enumerated double mixer control.
2802 *
2803 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2804 * used for handling bitfield coded enumeration for example.
2805 *
2806 * Returns 0 for success.
2807 */
2808 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2809 struct snd_ctl_elem_value *ucontrol)
2810 {
2811 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2812 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2813 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2814 unsigned int reg_val, val, mux;
2815
2816 reg_val = snd_soc_read(widget->codec, e->reg);
2817 val = (reg_val >> e->shift_l) & e->mask;
2818 for (mux = 0; mux < e->max; mux++) {
2819 if (val == e->values[mux])
2820 break;
2821 }
2822 ucontrol->value.enumerated.item[0] = mux;
2823 if (e->shift_l != e->shift_r) {
2824 val = (reg_val >> e->shift_r) & e->mask;
2825 for (mux = 0; mux < e->max; mux++) {
2826 if (val == e->values[mux])
2827 break;
2828 }
2829 ucontrol->value.enumerated.item[1] = mux;
2830 }
2831
2832 return 0;
2833 }
2834 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2835
2836 /**
2837 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2838 * callback
2839 * @kcontrol: mixer control
2840 * @ucontrol: control element information
2841 *
2842 * Callback to set the value of a dapm semi enumerated double mixer control.
2843 *
2844 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2845 * used for handling bitfield coded enumeration for example.
2846 *
2847 * Returns 0 for success.
2848 */
2849 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2850 struct snd_ctl_elem_value *ucontrol)
2851 {
2852 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2853 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2854 struct snd_soc_codec *codec = widget->codec;
2855 struct snd_soc_card *card = codec->card;
2856 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2857 unsigned int val, mux, change;
2858 unsigned int mask;
2859 struct snd_soc_dapm_update update;
2860 int wi;
2861
2862 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2863 return -EINVAL;
2864 mux = ucontrol->value.enumerated.item[0];
2865 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2866 mask = e->mask << e->shift_l;
2867 if (e->shift_l != e->shift_r) {
2868 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2869 return -EINVAL;
2870 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2871 mask |= e->mask << e->shift_r;
2872 }
2873
2874 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2875
2876 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2877 if (change) {
2878 for (wi = 0; wi < wlist->num_widgets; wi++) {
2879 widget = wlist->widgets[wi];
2880
2881 widget->value = val;
2882
2883 update.kcontrol = kcontrol;
2884 update.widget = widget;
2885 update.reg = e->reg;
2886 update.mask = mask;
2887 update.val = val;
2888 widget->dapm->update = &update;
2889
2890 soc_dapm_mux_update_power(widget, kcontrol, mux, e);
2891
2892 widget->dapm->update = NULL;
2893 }
2894 }
2895
2896 mutex_unlock(&card->dapm_mutex);
2897 return change;
2898 }
2899 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2900
2901 /**
2902 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2903 *
2904 * @kcontrol: mixer control
2905 * @uinfo: control element information
2906 *
2907 * Callback to provide information about a pin switch control.
2908 */
2909 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2910 struct snd_ctl_elem_info *uinfo)
2911 {
2912 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2913 uinfo->count = 1;
2914 uinfo->value.integer.min = 0;
2915 uinfo->value.integer.max = 1;
2916
2917 return 0;
2918 }
2919 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2920
2921 /**
2922 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2923 *
2924 * @kcontrol: mixer control
2925 * @ucontrol: Value
2926 */
2927 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2928 struct snd_ctl_elem_value *ucontrol)
2929 {
2930 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
2931 const char *pin = (const char *)kcontrol->private_value;
2932
2933 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2934
2935 ucontrol->value.integer.value[0] =
2936 snd_soc_dapm_get_pin_status(&card->dapm, pin);
2937
2938 mutex_unlock(&card->dapm_mutex);
2939
2940 return 0;
2941 }
2942 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2943
2944 /**
2945 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2946 *
2947 * @kcontrol: mixer control
2948 * @ucontrol: Value
2949 */
2950 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2951 struct snd_ctl_elem_value *ucontrol)
2952 {
2953 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
2954 const char *pin = (const char *)kcontrol->private_value;
2955
2956 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2957
2958 if (ucontrol->value.integer.value[0])
2959 snd_soc_dapm_enable_pin(&card->dapm, pin);
2960 else
2961 snd_soc_dapm_disable_pin(&card->dapm, pin);
2962
2963 mutex_unlock(&card->dapm_mutex);
2964
2965 snd_soc_dapm_sync(&card->dapm);
2966 return 0;
2967 }
2968 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2969
2970 static struct snd_soc_dapm_widget *
2971 snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2972 const struct snd_soc_dapm_widget *widget)
2973 {
2974 struct snd_soc_dapm_widget *w;
2975 size_t name_len;
2976 int ret;
2977
2978 if ((w = dapm_cnew_widget(widget)) == NULL)
2979 return NULL;
2980
2981 switch (w->id) {
2982 case snd_soc_dapm_regulator_supply:
2983 w->regulator = devm_regulator_get(dapm->dev, w->name);
2984 if (IS_ERR(w->regulator)) {
2985 ret = PTR_ERR(w->regulator);
2986 dev_err(dapm->dev, "Failed to request %s: %d\n",
2987 w->name, ret);
2988 return NULL;
2989 }
2990 break;
2991 case snd_soc_dapm_clock_supply:
2992 #ifdef CONFIG_CLKDEV_LOOKUP
2993 w->clk = devm_clk_get(dapm->dev, w->name);
2994 if (IS_ERR(w->clk)) {
2995 ret = PTR_ERR(w->clk);
2996 dev_err(dapm->dev, "Failed to request %s: %d\n",
2997 w->name, ret);
2998 return NULL;
2999 }
3000 #else
3001 return NULL;
3002 #endif
3003 break;
3004 default:
3005 break;
3006 }
3007
3008 name_len = strlen(widget->name) + 1;
3009 if (dapm->codec && dapm->codec->name_prefix)
3010 name_len += 1 + strlen(dapm->codec->name_prefix);
3011 w->name = kmalloc(name_len, GFP_KERNEL);
3012 if (w->name == NULL) {
3013 kfree(w);
3014 return NULL;
3015 }
3016 if (dapm->codec && dapm->codec->name_prefix)
3017 snprintf((char *)w->name, name_len, "%s %s",
3018 dapm->codec->name_prefix, widget->name);
3019 else
3020 snprintf((char *)w->name, name_len, "%s", widget->name);
3021
3022 switch (w->id) {
3023 case snd_soc_dapm_switch:
3024 case snd_soc_dapm_mixer:
3025 case snd_soc_dapm_mixer_named_ctl:
3026 w->power_check = dapm_generic_check_power;
3027 break;
3028 case snd_soc_dapm_mux:
3029 case snd_soc_dapm_virt_mux:
3030 case snd_soc_dapm_value_mux:
3031 w->power_check = dapm_generic_check_power;
3032 break;
3033 case snd_soc_dapm_adc:
3034 case snd_soc_dapm_aif_out:
3035 w->power_check = dapm_adc_check_power;
3036 break;
3037 case snd_soc_dapm_dac:
3038 case snd_soc_dapm_aif_in:
3039 w->power_check = dapm_dac_check_power;
3040 break;
3041 case snd_soc_dapm_pga:
3042 case snd_soc_dapm_out_drv:
3043 case snd_soc_dapm_input:
3044 case snd_soc_dapm_output:
3045 case snd_soc_dapm_micbias:
3046 case snd_soc_dapm_spk:
3047 case snd_soc_dapm_hp:
3048 case snd_soc_dapm_mic:
3049 case snd_soc_dapm_line:
3050 case snd_soc_dapm_dai_link:
3051 w->power_check = dapm_generic_check_power;
3052 break;
3053 case snd_soc_dapm_supply:
3054 case snd_soc_dapm_regulator_supply:
3055 case snd_soc_dapm_clock_supply:
3056 w->power_check = dapm_supply_check_power;
3057 break;
3058 case snd_soc_dapm_dai:
3059 w->power_check = dapm_dai_check_power;
3060 break;
3061 default:
3062 w->power_check = dapm_always_on_check_power;
3063 break;
3064 }
3065
3066 dapm->n_widgets++;
3067 w->dapm = dapm;
3068 w->codec = dapm->codec;
3069 w->platform = dapm->platform;
3070 INIT_LIST_HEAD(&w->sources);
3071 INIT_LIST_HEAD(&w->sinks);
3072 INIT_LIST_HEAD(&w->list);
3073 INIT_LIST_HEAD(&w->dirty);
3074 list_add(&w->list, &dapm->card->widgets);
3075
3076 /* machine layer set ups unconnected pins and insertions */
3077 w->connected = 1;
3078 return w;
3079 }
3080
3081 /**
3082 * snd_soc_dapm_new_controls - create new dapm controls
3083 * @dapm: DAPM context
3084 * @widget: widget array
3085 * @num: number of widgets
3086 *
3087 * Creates new DAPM controls based upon the templates.
3088 *
3089 * Returns 0 for success else error.
3090 */
3091 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
3092 const struct snd_soc_dapm_widget *widget,
3093 int num)
3094 {
3095 struct snd_soc_dapm_widget *w;
3096 int i;
3097 int ret = 0;
3098
3099 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
3100 for (i = 0; i < num; i++) {
3101 w = snd_soc_dapm_new_control(dapm, widget);
3102 if (!w) {
3103 dev_err(dapm->dev,
3104 "ASoC: Failed to create DAPM control %s\n",
3105 widget->name);
3106 ret = -ENOMEM;
3107 break;
3108 }
3109 widget++;
3110 }
3111 mutex_unlock(&dapm->card->dapm_mutex);
3112 return ret;
3113 }
3114 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3115
3116 static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3117 struct snd_kcontrol *kcontrol, int event)
3118 {
3119 struct snd_soc_dapm_path *source_p, *sink_p;
3120 struct snd_soc_dai *source, *sink;
3121 const struct snd_soc_pcm_stream *config = w->params;
3122 struct snd_pcm_substream substream;
3123 struct snd_pcm_hw_params *params = NULL;
3124 u64 fmt;
3125 int ret;
3126
3127 BUG_ON(!config);
3128 BUG_ON(list_empty(&w->sources) || list_empty(&w->sinks));
3129
3130 /* We only support a single source and sink, pick the first */
3131 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3132 list_sink);
3133 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3134 list_source);
3135
3136 BUG_ON(!source_p || !sink_p);
3137 BUG_ON(!sink_p->source || !source_p->sink);
3138 BUG_ON(!source_p->source || !sink_p->sink);
3139
3140 source = source_p->source->priv;
3141 sink = sink_p->sink->priv;
3142
3143 /* Be a little careful as we don't want to overflow the mask array */
3144 if (config->formats) {
3145 fmt = ffs(config->formats) - 1;
3146 } else {
3147 dev_warn(w->dapm->dev, "Invalid format %llx specified\n",
3148 config->formats);
3149 fmt = 0;
3150 }
3151
3152 /* Currently very limited parameter selection */
3153 params = kzalloc(sizeof(*params), GFP_KERNEL);
3154 if (!params) {
3155 ret = -ENOMEM;
3156 goto out;
3157 }
3158 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
3159
3160 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
3161 config->rate_min;
3162 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
3163 config->rate_max;
3164
3165 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
3166 = config->channels_min;
3167 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
3168 = config->channels_max;
3169
3170 memset(&substream, 0, sizeof(substream));
3171
3172 switch (event) {
3173 case SND_SOC_DAPM_PRE_PMU:
3174 if (source->driver->ops && source->driver->ops->hw_params) {
3175 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3176 ret = source->driver->ops->hw_params(&substream,
3177 params, source);
3178 if (ret != 0) {
3179 dev_err(source->dev,
3180 "hw_params() failed: %d\n", ret);
3181 goto out;
3182 }
3183 }
3184
3185 if (sink->driver->ops && sink->driver->ops->hw_params) {
3186 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
3187 ret = sink->driver->ops->hw_params(&substream, params,
3188 sink);
3189 if (ret != 0) {
3190 dev_err(sink->dev,
3191 "hw_params() failed: %d\n", ret);
3192 goto out;
3193 }
3194 }
3195 break;
3196
3197 case SND_SOC_DAPM_POST_PMU:
3198 ret = snd_soc_dai_digital_mute(sink, 0);
3199 if (ret != 0 && ret != -ENOTSUPP)
3200 dev_warn(sink->dev, "Failed to unmute: %d\n", ret);
3201 ret = 0;
3202 break;
3203
3204 case SND_SOC_DAPM_PRE_PMD:
3205 ret = snd_soc_dai_digital_mute(sink, 1);
3206 if (ret != 0 && ret != -ENOTSUPP)
3207 dev_warn(sink->dev, "Failed to mute: %d\n", ret);
3208 ret = 0;
3209 break;
3210
3211 default:
3212 BUG();
3213 return -EINVAL;
3214 }
3215
3216 out:
3217 kfree(params);
3218 return ret;
3219 }
3220
3221 int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3222 const struct snd_soc_pcm_stream *params,
3223 struct snd_soc_dapm_widget *source,
3224 struct snd_soc_dapm_widget *sink)
3225 {
3226 struct snd_soc_dapm_route routes[2];
3227 struct snd_soc_dapm_widget template;
3228 struct snd_soc_dapm_widget *w;
3229 size_t len;
3230 char *link_name;
3231
3232 len = strlen(source->name) + strlen(sink->name) + 2;
3233 link_name = devm_kzalloc(card->dev, len, GFP_KERNEL);
3234 if (!link_name)
3235 return -ENOMEM;
3236 snprintf(link_name, len, "%s-%s", source->name, sink->name);
3237
3238 memset(&template, 0, sizeof(template));
3239 template.reg = SND_SOC_NOPM;
3240 template.id = snd_soc_dapm_dai_link;
3241 template.name = link_name;
3242 template.event = snd_soc_dai_link_event;
3243 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3244 SND_SOC_DAPM_PRE_PMD;
3245
3246 dev_dbg(card->dev, "adding %s widget\n", link_name);
3247
3248 w = snd_soc_dapm_new_control(&card->dapm, &template);
3249 if (!w) {
3250 dev_err(card->dev, "Failed to create %s widget\n",
3251 link_name);
3252 return -ENOMEM;
3253 }
3254
3255 w->params = params;
3256
3257 memset(&routes, 0, sizeof(routes));
3258
3259 routes[0].source = source->name;
3260 routes[0].sink = link_name;
3261 routes[1].source = link_name;
3262 routes[1].sink = sink->name;
3263
3264 return snd_soc_dapm_add_routes(&card->dapm, routes,
3265 ARRAY_SIZE(routes));
3266 }
3267
3268 int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3269 struct snd_soc_dai *dai)
3270 {
3271 struct snd_soc_dapm_widget template;
3272 struct snd_soc_dapm_widget *w;
3273
3274 WARN_ON(dapm->dev != dai->dev);
3275
3276 memset(&template, 0, sizeof(template));
3277 template.reg = SND_SOC_NOPM;
3278
3279 if (dai->driver->playback.stream_name) {
3280 template.id = snd_soc_dapm_dai;
3281 template.name = dai->driver->playback.stream_name;
3282 template.sname = dai->driver->playback.stream_name;
3283
3284 dev_dbg(dai->dev, "adding %s widget\n",
3285 template.name);
3286
3287 w = snd_soc_dapm_new_control(dapm, &template);
3288 if (!w) {
3289 dev_err(dapm->dev, "Failed to create %s widget\n",
3290 dai->driver->playback.stream_name);
3291 }
3292
3293 w->priv = dai;
3294 dai->playback_widget = w;
3295 }
3296
3297 if (dai->driver->capture.stream_name) {
3298 template.id = snd_soc_dapm_dai;
3299 template.name = dai->driver->capture.stream_name;
3300 template.sname = dai->driver->capture.stream_name;
3301
3302 dev_dbg(dai->dev, "adding %s widget\n",
3303 template.name);
3304
3305 w = snd_soc_dapm_new_control(dapm, &template);
3306 if (!w) {
3307 dev_err(dapm->dev, "Failed to create %s widget\n",
3308 dai->driver->capture.stream_name);
3309 }
3310
3311 w->priv = dai;
3312 dai->capture_widget = w;
3313 }
3314
3315 return 0;
3316 }
3317
3318 int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3319 {
3320 struct snd_soc_dapm_widget *dai_w, *w;
3321 struct snd_soc_dai *dai;
3322 struct snd_soc_dapm_route r;
3323
3324 memset(&r, 0, sizeof(r));
3325
3326 /* For each DAI widget... */
3327 list_for_each_entry(dai_w, &card->widgets, list) {
3328 if (dai_w->id != snd_soc_dapm_dai)
3329 continue;
3330
3331 dai = dai_w->priv;
3332
3333 /* ...find all widgets with the same stream and link them */
3334 list_for_each_entry(w, &card->widgets, list) {
3335 if (w->dapm != dai_w->dapm)
3336 continue;
3337
3338 if (w->id == snd_soc_dapm_dai)
3339 continue;
3340
3341 if (!w->sname)
3342 continue;
3343
3344 if (dai->driver->playback.stream_name &&
3345 strstr(w->sname,
3346 dai->driver->playback.stream_name)) {
3347 r.source = dai->playback_widget->name;
3348 r.sink = w->name;
3349 dev_dbg(dai->dev, "%s -> %s\n",
3350 r.source, r.sink);
3351
3352 snd_soc_dapm_add_route(w->dapm, &r);
3353 }
3354
3355 if (dai->driver->capture.stream_name &&
3356 strstr(w->sname,
3357 dai->driver->capture.stream_name)) {
3358 r.source = w->name;
3359 r.sink = dai->capture_widget->name;
3360 dev_dbg(dai->dev, "%s -> %s\n",
3361 r.source, r.sink);
3362
3363 snd_soc_dapm_add_route(w->dapm, &r);
3364 }
3365 }
3366 }
3367
3368 return 0;
3369 }
3370
3371 static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3372 int event)
3373 {
3374
3375 struct snd_soc_dapm_widget *w_cpu, *w_codec;
3376 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3377 struct snd_soc_dai *codec_dai = rtd->codec_dai;
3378
3379 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
3380 w_cpu = cpu_dai->playback_widget;
3381 w_codec = codec_dai->playback_widget;
3382 } else {
3383 w_cpu = cpu_dai->capture_widget;
3384 w_codec = codec_dai->capture_widget;
3385 }
3386
3387 if (w_cpu) {
3388
3389 dapm_mark_dirty(w_cpu, "stream event");
3390
3391 switch (event) {
3392 case SND_SOC_DAPM_STREAM_START:
3393 w_cpu->active = 1;
3394 break;
3395 case SND_SOC_DAPM_STREAM_STOP:
3396 w_cpu->active = 0;
3397 break;
3398 case SND_SOC_DAPM_STREAM_SUSPEND:
3399 case SND_SOC_DAPM_STREAM_RESUME:
3400 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3401 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3402 break;
3403 }
3404 }
3405
3406 if (w_codec) {
3407
3408 dapm_mark_dirty(w_codec, "stream event");
3409
3410 switch (event) {
3411 case SND_SOC_DAPM_STREAM_START:
3412 w_codec->active = 1;
3413 break;
3414 case SND_SOC_DAPM_STREAM_STOP:
3415 w_codec->active = 0;
3416 break;
3417 case SND_SOC_DAPM_STREAM_SUSPEND:
3418 case SND_SOC_DAPM_STREAM_RESUME:
3419 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3420 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3421 break;
3422 }
3423 }
3424
3425 dapm_power_widgets(&rtd->card->dapm, event);
3426 }
3427
3428 /**
3429 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3430 * @rtd: PCM runtime data
3431 * @stream: stream name
3432 * @event: stream event
3433 *
3434 * Sends a stream event to the dapm core. The core then makes any
3435 * necessary widget power changes.
3436 *
3437 * Returns 0 for success else error.
3438 */
3439 void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3440 int event)
3441 {
3442 struct snd_soc_card *card = rtd->card;
3443
3444 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
3445 soc_dapm_stream_event(rtd, stream, event);
3446 mutex_unlock(&card->dapm_mutex);
3447 }
3448
3449 /**
3450 * snd_soc_dapm_enable_pin - enable pin.
3451 * @dapm: DAPM context
3452 * @pin: pin name
3453 *
3454 * Enables input/output pin and its parents or children widgets iff there is
3455 * a valid audio route and active audio stream.
3456 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3457 * do any widget power switching.
3458 */
3459 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3460 {
3461 return snd_soc_dapm_set_pin(dapm, pin, 1);
3462 }
3463 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
3464
3465 /**
3466 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
3467 * @dapm: DAPM context
3468 * @pin: pin name
3469 *
3470 * Enables input/output pin regardless of any other state. This is
3471 * intended for use with microphone bias supplies used in microphone
3472 * jack detection.
3473 *
3474 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3475 * do any widget power switching.
3476 */
3477 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3478 const char *pin)
3479 {
3480 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3481
3482 if (!w) {
3483 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
3484 return -EINVAL;
3485 }
3486
3487 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
3488 w->connected = 1;
3489 w->force = 1;
3490 dapm_mark_dirty(w, "force enable");
3491
3492 return 0;
3493 }
3494 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3495
3496 /**
3497 * snd_soc_dapm_disable_pin - disable pin.
3498 * @dapm: DAPM context
3499 * @pin: pin name
3500 *
3501 * Disables input/output pin and its parents or children widgets.
3502 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3503 * do any widget power switching.
3504 */
3505 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3506 const char *pin)
3507 {
3508 return snd_soc_dapm_set_pin(dapm, pin, 0);
3509 }
3510 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
3511
3512 /**
3513 * snd_soc_dapm_nc_pin - permanently disable pin.
3514 * @dapm: DAPM context
3515 * @pin: pin name
3516 *
3517 * Marks the specified pin as being not connected, disabling it along
3518 * any parent or child widgets. At present this is identical to
3519 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3520 * additional things such as disabling controls which only affect
3521 * paths through the pin.
3522 *
3523 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3524 * do any widget power switching.
3525 */
3526 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
3527 {
3528 return snd_soc_dapm_set_pin(dapm, pin, 0);
3529 }
3530 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3531
3532 /**
3533 * snd_soc_dapm_get_pin_status - get audio pin status
3534 * @dapm: DAPM context
3535 * @pin: audio signal pin endpoint (or start point)
3536 *
3537 * Get audio pin status - connected or disconnected.
3538 *
3539 * Returns 1 for connected otherwise 0.
3540 */
3541 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3542 const char *pin)
3543 {
3544 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
3545
3546 if (w)
3547 return w->connected;
3548
3549 return 0;
3550 }
3551 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
3552
3553 /**
3554 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
3555 * @dapm: DAPM context
3556 * @pin: audio signal pin endpoint (or start point)
3557 *
3558 * Mark the given endpoint or pin as ignoring suspend. When the
3559 * system is disabled a path between two endpoints flagged as ignoring
3560 * suspend will not be disabled. The path must already be enabled via
3561 * normal means at suspend time, it will not be turned on if it was not
3562 * already enabled.
3563 */
3564 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3565 const char *pin)
3566 {
3567 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
3568
3569 if (!w) {
3570 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
3571 return -EINVAL;
3572 }
3573
3574 w->ignore_suspend = 1;
3575
3576 return 0;
3577 }
3578 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3579
3580 static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3581 struct snd_soc_dapm_widget *w)
3582 {
3583 struct snd_soc_dapm_path *p;
3584
3585 list_for_each_entry(p, &card->paths, list) {
3586 if ((p->source == w) || (p->sink == w)) {
3587 dev_dbg(card->dev,
3588 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3589 p->source->name, p->source->id, p->source->dapm,
3590 p->sink->name, p->sink->id, p->sink->dapm);
3591
3592 /* Connected to something other than the codec */
3593 if (p->source->dapm != p->sink->dapm)
3594 return true;
3595 /*
3596 * Loopback connection from codec external pin to
3597 * codec external pin
3598 */
3599 if (p->sink->id == snd_soc_dapm_input) {
3600 switch (p->source->id) {
3601 case snd_soc_dapm_output:
3602 case snd_soc_dapm_micbias:
3603 return true;
3604 default:
3605 break;
3606 }
3607 }
3608 }
3609 }
3610
3611 return false;
3612 }
3613
3614 /**
3615 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3616 * @codec: The codec whose pins should be processed
3617 *
3618 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3619 * which are unused. Pins are used if they are connected externally to the
3620 * codec, whether that be to some other device, or a loop-back connection to
3621 * the codec itself.
3622 */
3623 void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3624 {
3625 struct snd_soc_card *card = codec->card;
3626 struct snd_soc_dapm_context *dapm = &codec->dapm;
3627 struct snd_soc_dapm_widget *w;
3628
3629 dev_dbg(codec->dev, "Auto NC: DAPMs: card:%p codec:%p\n",
3630 &card->dapm, &codec->dapm);
3631
3632 list_for_each_entry(w, &card->widgets, list) {
3633 if (w->dapm != dapm)
3634 continue;
3635 switch (w->id) {
3636 case snd_soc_dapm_input:
3637 case snd_soc_dapm_output:
3638 case snd_soc_dapm_micbias:
3639 dev_dbg(codec->dev, "Auto NC: Checking widget %s\n",
3640 w->name);
3641 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
3642 dev_dbg(codec->dev,
3643 "... Not in map; disabling\n");
3644 snd_soc_dapm_nc_pin(dapm, w->name);
3645 }
3646 break;
3647 default:
3648 break;
3649 }
3650 }
3651 }
3652
3653 /**
3654 * snd_soc_dapm_free - free dapm resources
3655 * @dapm: DAPM context
3656 *
3657 * Free all dapm widgets and resources.
3658 */
3659 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
3660 {
3661 snd_soc_dapm_sys_remove(dapm->dev);
3662 dapm_debugfs_cleanup(dapm);
3663 dapm_free_widgets(dapm);
3664 list_del(&dapm->list);
3665 }
3666 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3667
3668 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
3669 {
3670 struct snd_soc_card *card = dapm->card;
3671 struct snd_soc_dapm_widget *w;
3672 LIST_HEAD(down_list);
3673 int powerdown = 0;
3674
3675 mutex_lock(&card->dapm_mutex);
3676
3677 list_for_each_entry(w, &dapm->card->widgets, list) {
3678 if (w->dapm != dapm)
3679 continue;
3680 if (w->power) {
3681 dapm_seq_insert(w, &down_list, false);
3682 w->power = 0;
3683 powerdown = 1;
3684 }
3685 }
3686
3687 /* If there were no widgets to power down we're already in
3688 * standby.
3689 */
3690 if (powerdown) {
3691 if (dapm->bias_level == SND_SOC_BIAS_ON)
3692 snd_soc_dapm_set_bias_level(dapm,
3693 SND_SOC_BIAS_PREPARE);
3694 dapm_seq_run(dapm, &down_list, 0, false);
3695 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3696 snd_soc_dapm_set_bias_level(dapm,
3697 SND_SOC_BIAS_STANDBY);
3698 }
3699
3700 mutex_unlock(&card->dapm_mutex);
3701 }
3702
3703 /*
3704 * snd_soc_dapm_shutdown - callback for system shutdown
3705 */
3706 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3707 {
3708 struct snd_soc_codec *codec;
3709
3710 list_for_each_entry(codec, &card->codec_dev_list, list) {
3711 soc_dapm_shutdown_codec(&codec->dapm);
3712 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3713 snd_soc_dapm_set_bias_level(&codec->dapm,
3714 SND_SOC_BIAS_OFF);
3715 }
3716 }
3717
3718 /* Module information */
3719 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3720 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3721 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)