?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ASoC: Do DAPM power checks only for widgets changed since last run
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / sound / soc / soc-dapm.c
blob9d6bb33e6094d7c9f646ad8d2584ba90927835e0
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/meadphone 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 powerdown of audio susbsystem to reduce pops between a quick
22 * device reopen.
23 *
24 * Todo:
25 * o DAPM power change sequencing - allow for configurable per
26 * codec sequences.
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
30 */
31
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/async.h>
36 #include <linux/delay.h>
37 #include <linux/pm.h>
38 #include <linux/bitops.h>
39 #include <linux/platform_device.h>
40 #include <linux/jiffies.h>
41 #include <linux/debugfs.h>
42 #include <linux/slab.h>
43 #include <sound/core.h>
44 #include <sound/pcm.h>
45 #include <sound/pcm_params.h>
46 #include <sound/soc.h>
47 #include <sound/initval.h>
48
49 #include <trace/events/asoc.h>
50
51 #define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
52
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq[] = {
55 [snd_soc_dapm_pre] = 0,
56 [snd_soc_dapm_supply] = 1,
57 [snd_soc_dapm_micbias] = 2,
58 [snd_soc_dapm_aif_in] = 3,
59 [snd_soc_dapm_aif_out] = 3,
60 [snd_soc_dapm_mic] = 4,
61 [snd_soc_dapm_mux] = 5,
62 [snd_soc_dapm_virt_mux] = 5,
63 [snd_soc_dapm_value_mux] = 5,
64 [snd_soc_dapm_dac] = 6,
65 [snd_soc_dapm_mixer] = 7,
66 [snd_soc_dapm_mixer_named_ctl] = 7,
67 [snd_soc_dapm_pga] = 8,
68 [snd_soc_dapm_adc] = 9,
69 [snd_soc_dapm_out_drv] = 10,
70 [snd_soc_dapm_hp] = 10,
71 [snd_soc_dapm_spk] = 10,
72 [snd_soc_dapm_post] = 11,
73 };
74
75 static int dapm_down_seq[] = {
76 [snd_soc_dapm_pre] = 0,
77 [snd_soc_dapm_adc] = 1,
78 [snd_soc_dapm_hp] = 2,
79 [snd_soc_dapm_spk] = 2,
80 [snd_soc_dapm_out_drv] = 2,
81 [snd_soc_dapm_pga] = 4,
82 [snd_soc_dapm_mixer_named_ctl] = 5,
83 [snd_soc_dapm_mixer] = 5,
84 [snd_soc_dapm_dac] = 6,
85 [snd_soc_dapm_mic] = 7,
86 [snd_soc_dapm_micbias] = 8,
87 [snd_soc_dapm_mux] = 9,
88 [snd_soc_dapm_virt_mux] = 9,
89 [snd_soc_dapm_value_mux] = 9,
90 [snd_soc_dapm_aif_in] = 10,
91 [snd_soc_dapm_aif_out] = 10,
92 [snd_soc_dapm_supply] = 11,
93 [snd_soc_dapm_post] = 12,
94 };
95
96 static void pop_wait(u32 pop_time)
97 {
98 if (pop_time)
99 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
100 }
101
102 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
103 {
104 va_list args;
105 char *buf;
106
107 if (!pop_time)
108 return;
109
110 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
111 if (buf == NULL)
112 return;
113
114 va_start(args, fmt);
115 vsnprintf(buf, PAGE_SIZE, fmt, args);
116 dev_info(dev, "%s", buf);
117 va_end(args);
118
119 kfree(buf);
120 }
121
122 static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
123 {
124 return !list_empty(&w->dirty);
125 }
126
127 static void dapm_mark_dirty(struct snd_soc_dapm_widget *w)
128 {
129 if (!dapm_dirty_widget(w))
130 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
131 }
132
133 /* create a new dapm widget */
134 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
135 const struct snd_soc_dapm_widget *_widget)
136 {
137 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
138 }
139
140 /* get snd_card from DAPM context */
141 static inline struct snd_card *dapm_get_snd_card(
142 struct snd_soc_dapm_context *dapm)
143 {
144 if (dapm->codec)
145 return dapm->codec->card->snd_card;
146 else if (dapm->platform)
147 return dapm->platform->card->snd_card;
148 else
149 BUG();
150
151 /* unreachable */
152 return NULL;
153 }
154
155 /* get soc_card from DAPM context */
156 static inline struct snd_soc_card *dapm_get_soc_card(
157 struct snd_soc_dapm_context *dapm)
158 {
159 if (dapm->codec)
160 return dapm->codec->card;
161 else if (dapm->platform)
162 return dapm->platform->card;
163 else
164 BUG();
165
166 /* unreachable */
167 return NULL;
168 }
169
170 static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
171 {
172 if (w->codec)
173 return snd_soc_read(w->codec, reg);
174 else if (w->platform)
175 return snd_soc_platform_read(w->platform, reg);
176
177 dev_err(w->dapm->dev, "no valid widget read method\n");
178 return -1;
179 }
180
181 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
182 {
183 if (w->codec)
184 return snd_soc_write(w->codec, reg, val);
185 else if (w->platform)
186 return snd_soc_platform_write(w->platform, reg, val);
187
188 dev_err(w->dapm->dev, "no valid widget write method\n");
189 return -1;
190 }
191
192 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
193 unsigned short reg, unsigned int mask, unsigned int value)
194 {
195 int change;
196 unsigned int old, new;
197 int ret;
198
199 ret = soc_widget_read(w, reg);
200 if (ret < 0)
201 return ret;
202
203 old = ret;
204 new = (old & ~mask) | (value & mask);
205 change = old != new;
206 if (change) {
207 ret = soc_widget_write(w, reg, new);
208 if (ret < 0)
209 return ret;
210 }
211
212 return change;
213 }
214
215 /**
216 * snd_soc_dapm_set_bias_level - set the bias level for the system
217 * @dapm: DAPM context
218 * @level: level to configure
219 *
220 * Configure the bias (power) levels for the SoC audio device.
221 *
222 * Returns 0 for success else error.
223 */
224 static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
225 enum snd_soc_bias_level level)
226 {
227 struct snd_soc_card *card = dapm->card;
228 int ret = 0;
229
230 trace_snd_soc_bias_level_start(card, level);
231
232 if (card && card->set_bias_level)
233 ret = card->set_bias_level(card, dapm, level);
234 if (ret != 0)
235 goto out;
236
237 if (dapm->codec) {
238 if (dapm->codec->driver->set_bias_level)
239 ret = dapm->codec->driver->set_bias_level(dapm->codec,
240 level);
241 else
242 dapm->bias_level = level;
243 }
244 if (ret != 0)
245 goto out;
246
247 if (card && card->set_bias_level_post)
248 ret = card->set_bias_level_post(card, dapm, level);
249 out:
250 trace_snd_soc_bias_level_done(card, level);
251
252 return ret;
253 }
254
255 /* set up initial codec paths */
256 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
257 struct snd_soc_dapm_path *p, int i)
258 {
259 switch (w->id) {
260 case snd_soc_dapm_switch:
261 case snd_soc_dapm_mixer:
262 case snd_soc_dapm_mixer_named_ctl: {
263 int val;
264 struct soc_mixer_control *mc = (struct soc_mixer_control *)
265 w->kcontrol_news[i].private_value;
266 unsigned int reg = mc->reg;
267 unsigned int shift = mc->shift;
268 int max = mc->max;
269 unsigned int mask = (1 << fls(max)) - 1;
270 unsigned int invert = mc->invert;
271
272 val = soc_widget_read(w, reg);
273 val = (val >> shift) & mask;
274
275 if ((invert && !val) || (!invert && val))
276 p->connect = 1;
277 else
278 p->connect = 0;
279 }
280 break;
281 case snd_soc_dapm_mux: {
282 struct soc_enum *e = (struct soc_enum *)
283 w->kcontrol_news[i].private_value;
284 int val, item, bitmask;
285
286 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
287 ;
288 val = soc_widget_read(w, e->reg);
289 item = (val >> e->shift_l) & (bitmask - 1);
290
291 p->connect = 0;
292 for (i = 0; i < e->max; i++) {
293 if (!(strcmp(p->name, e->texts[i])) && item == i)
294 p->connect = 1;
295 }
296 }
297 break;
298 case snd_soc_dapm_virt_mux: {
299 struct soc_enum *e = (struct soc_enum *)
300 w->kcontrol_news[i].private_value;
301
302 p->connect = 0;
303 /* since a virtual mux has no backing registers to
304 * decide which path to connect, it will try to match
305 * with the first enumeration. This is to ensure
306 * that the default mux choice (the first) will be
307 * correctly powered up during initialization.
308 */
309 if (!strcmp(p->name, e->texts[0]))
310 p->connect = 1;
311 }
312 break;
313 case snd_soc_dapm_value_mux: {
314 struct soc_enum *e = (struct soc_enum *)
315 w->kcontrol_news[i].private_value;
316 int val, item;
317
318 val = soc_widget_read(w, e->reg);
319 val = (val >> e->shift_l) & e->mask;
320 for (item = 0; item < e->max; item++) {
321 if (val == e->values[item])
322 break;
323 }
324
325 p->connect = 0;
326 for (i = 0; i < e->max; i++) {
327 if (!(strcmp(p->name, e->texts[i])) && item == i)
328 p->connect = 1;
329 }
330 }
331 break;
332 /* does not affect routing - always connected */
333 case snd_soc_dapm_pga:
334 case snd_soc_dapm_out_drv:
335 case snd_soc_dapm_output:
336 case snd_soc_dapm_adc:
337 case snd_soc_dapm_input:
338 case snd_soc_dapm_dac:
339 case snd_soc_dapm_micbias:
340 case snd_soc_dapm_vmid:
341 case snd_soc_dapm_supply:
342 case snd_soc_dapm_aif_in:
343 case snd_soc_dapm_aif_out:
344 case snd_soc_dapm_hp:
345 case snd_soc_dapm_mic:
346 case snd_soc_dapm_spk:
347 case snd_soc_dapm_line:
348 p->connect = 1;
349 break;
350 /* does affect routing - dynamically connected */
351 case snd_soc_dapm_pre:
352 case snd_soc_dapm_post:
353 p->connect = 0;
354 break;
355 }
356 }
357
358 /* connect mux widget to its interconnecting audio paths */
359 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
360 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
361 struct snd_soc_dapm_path *path, const char *control_name,
362 const struct snd_kcontrol_new *kcontrol)
363 {
364 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
365 int i;
366
367 for (i = 0; i < e->max; i++) {
368 if (!(strcmp(control_name, e->texts[i]))) {
369 list_add(&path->list, &dapm->card->paths);
370 list_add(&path->list_sink, &dest->sources);
371 list_add(&path->list_source, &src->sinks);
372 path->name = (char*)e->texts[i];
373 dapm_set_path_status(dest, path, 0);
374 return 0;
375 }
376 }
377
378 return -ENODEV;
379 }
380
381 /* connect mixer widget to its interconnecting audio paths */
382 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
383 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
384 struct snd_soc_dapm_path *path, const char *control_name)
385 {
386 int i;
387
388 /* search for mixer kcontrol */
389 for (i = 0; i < dest->num_kcontrols; i++) {
390 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
391 list_add(&path->list, &dapm->card->paths);
392 list_add(&path->list_sink, &dest->sources);
393 list_add(&path->list_source, &src->sinks);
394 path->name = dest->kcontrol_news[i].name;
395 dapm_set_path_status(dest, path, i);
396 return 0;
397 }
398 }
399 return -ENODEV;
400 }
401
402 static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
403 struct snd_soc_dapm_widget *kcontrolw,
404 const struct snd_kcontrol_new *kcontrol_new,
405 struct snd_kcontrol **kcontrol)
406 {
407 struct snd_soc_dapm_widget *w;
408 int i;
409
410 *kcontrol = NULL;
411
412 list_for_each_entry(w, &dapm->card->widgets, list) {
413 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
414 continue;
415 for (i = 0; i < w->num_kcontrols; i++) {
416 if (&w->kcontrol_news[i] == kcontrol_new) {
417 if (w->kcontrols)
418 *kcontrol = w->kcontrols[i];
419 return 1;
420 }
421 }
422 }
423
424 return 0;
425 }
426
427 /* create new dapm mixer control */
428 static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
429 {
430 struct snd_soc_dapm_context *dapm = w->dapm;
431 int i, ret = 0;
432 size_t name_len, prefix_len;
433 struct snd_soc_dapm_path *path;
434 struct snd_card *card = dapm->card->snd_card;
435 const char *prefix;
436 struct snd_soc_dapm_widget_list *wlist;
437 size_t wlistsize;
438
439 if (dapm->codec)
440 prefix = dapm->codec->name_prefix;
441 else
442 prefix = NULL;
443
444 if (prefix)
445 prefix_len = strlen(prefix) + 1;
446 else
447 prefix_len = 0;
448
449 /* add kcontrol */
450 for (i = 0; i < w->num_kcontrols; i++) {
451
452 /* match name */
453 list_for_each_entry(path, &w->sources, list_sink) {
454
455 /* mixer/mux paths name must match control name */
456 if (path->name != (char *)w->kcontrol_news[i].name)
457 continue;
458
459 if (w->kcontrols[i]) {
460 path->kcontrol = w->kcontrols[i];
461 continue;
462 }
463
464 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
465 sizeof(struct snd_soc_dapm_widget *),
466 wlist = kzalloc(wlistsize, GFP_KERNEL);
467 if (wlist == NULL) {
468 dev_err(dapm->dev,
469 "asoc: can't allocate widget list for %s\n",
470 w->name);
471 return -ENOMEM;
472 }
473 wlist->num_widgets = 1;
474 wlist->widgets[0] = w;
475
476 /* add dapm control with long name.
477 * for dapm_mixer this is the concatenation of the
478 * mixer and kcontrol name.
479 * for dapm_mixer_named_ctl this is simply the
480 * kcontrol name.
481 */
482 name_len = strlen(w->kcontrol_news[i].name) + 1;
483 if (w->id != snd_soc_dapm_mixer_named_ctl)
484 name_len += 1 + strlen(w->name);
485
486 path->long_name = kmalloc(name_len, GFP_KERNEL);
487
488 if (path->long_name == NULL) {
489 kfree(wlist);
490 return -ENOMEM;
491 }
492
493 switch (w->id) {
494 default:
495 /* The control will get a prefix from
496 * the control creation process but
497 * we're also using the same prefix
498 * for widgets so cut the prefix off
499 * the front of the widget name.
500 */
501 snprintf(path->long_name, name_len, "%s %s",
502 w->name + prefix_len,
503 w->kcontrol_news[i].name);
504 break;
505 case snd_soc_dapm_mixer_named_ctl:
506 snprintf(path->long_name, name_len, "%s",
507 w->kcontrol_news[i].name);
508 break;
509 }
510
511 path->long_name[name_len - 1] = '\0';
512
513 path->kcontrol = snd_soc_cnew(&w->kcontrol_news[i],
514 wlist, path->long_name,
515 prefix);
516 ret = snd_ctl_add(card, path->kcontrol);
517 if (ret < 0) {
518 dev_err(dapm->dev,
519 "asoc: failed to add dapm kcontrol %s: %d\n",
520 path->long_name, ret);
521 kfree(wlist);
522 kfree(path->long_name);
523 path->long_name = NULL;
524 return ret;
525 }
526 w->kcontrols[i] = path->kcontrol;
527 }
528 }
529 return ret;
530 }
531
532 /* create new dapm mux control */
533 static int dapm_new_mux(struct snd_soc_dapm_widget *w)
534 {
535 struct snd_soc_dapm_context *dapm = w->dapm;
536 struct snd_soc_dapm_path *path = NULL;
537 struct snd_kcontrol *kcontrol;
538 struct snd_card *card = dapm->card->snd_card;
539 const char *prefix;
540 size_t prefix_len;
541 int ret;
542 struct snd_soc_dapm_widget_list *wlist;
543 int shared, wlistentries;
544 size_t wlistsize;
545 char *name;
546
547 if (w->num_kcontrols != 1) {
548 dev_err(dapm->dev,
549 "asoc: mux %s has incorrect number of controls\n",
550 w->name);
551 return -EINVAL;
552 }
553
554 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[0],
555 &kcontrol);
556 if (kcontrol) {
557 wlist = kcontrol->private_data;
558 wlistentries = wlist->num_widgets + 1;
559 } else {
560 wlist = NULL;
561 wlistentries = 1;
562 }
563 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
564 wlistentries * sizeof(struct snd_soc_dapm_widget *),
565 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
566 if (wlist == NULL) {
567 dev_err(dapm->dev,
568 "asoc: can't allocate widget list for %s\n", w->name);
569 return -ENOMEM;
570 }
571 wlist->num_widgets = wlistentries;
572 wlist->widgets[wlistentries - 1] = w;
573
574 if (!kcontrol) {
575 if (dapm->codec)
576 prefix = dapm->codec->name_prefix;
577 else
578 prefix = NULL;
579
580 if (shared) {
581 name = w->kcontrol_news[0].name;
582 prefix_len = 0;
583 } else {
584 name = w->name;
585 if (prefix)
586 prefix_len = strlen(prefix) + 1;
587 else
588 prefix_len = 0;
589 }
590
591 /*
592 * The control will get a prefix from the control creation
593 * process but we're also using the same prefix for widgets so
594 * cut the prefix off the front of the widget name.
595 */
596 kcontrol = snd_soc_cnew(&w->kcontrol_news[0], wlist,
597 name + prefix_len, prefix);
598 ret = snd_ctl_add(card, kcontrol);
599 if (ret < 0) {
600 dev_err(dapm->dev, "failed to add kcontrol %s: %d\n",
601 w->name, ret);
602 kfree(wlist);
603 return ret;
604 }
605 }
606
607 kcontrol->private_data = wlist;
608
609 w->kcontrols[0] = kcontrol;
610
611 list_for_each_entry(path, &w->sources, list_sink)
612 path->kcontrol = kcontrol;
613
614 return 0;
615 }
616
617 /* create new dapm volume control */
618 static int dapm_new_pga(struct snd_soc_dapm_widget *w)
619 {
620 if (w->num_kcontrols)
621 dev_err(w->dapm->dev,
622 "asoc: PGA controls not supported: '%s'\n", w->name);
623
624 return 0;
625 }
626
627 /* reset 'walked' bit for each dapm path */
628 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
629 {
630 struct snd_soc_dapm_path *p;
631
632 list_for_each_entry(p, &dapm->card->paths, list)
633 p->walked = 0;
634 }
635
636 /* We implement power down on suspend by checking the power state of
637 * the ALSA card - when we are suspending the ALSA state for the card
638 * is set to D3.
639 */
640 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
641 {
642 int level = snd_power_get_state(widget->dapm->card->snd_card);
643
644 switch (level) {
645 case SNDRV_CTL_POWER_D3hot:
646 case SNDRV_CTL_POWER_D3cold:
647 if (widget->ignore_suspend)
648 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
649 widget->name);
650 return widget->ignore_suspend;
651 default:
652 return 1;
653 }
654 }
655
656 /*
657 * Recursively check for a completed path to an active or physically connected
658 * output widget. Returns number of complete paths.
659 */
660 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
661 {
662 struct snd_soc_dapm_path *path;
663 int con = 0;
664
665 DAPM_UPDATE_STAT(widget, path_checks);
666
667 if (widget->id == snd_soc_dapm_supply)
668 return 0;
669
670 switch (widget->id) {
671 case snd_soc_dapm_adc:
672 case snd_soc_dapm_aif_out:
673 if (widget->active)
674 return snd_soc_dapm_suspend_check(widget);
675 default:
676 break;
677 }
678
679 if (widget->connected) {
680 /* connected pin ? */
681 if (widget->id == snd_soc_dapm_output && !widget->ext)
682 return snd_soc_dapm_suspend_check(widget);
683
684 /* connected jack or spk ? */
685 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
686 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
687 return snd_soc_dapm_suspend_check(widget);
688 }
689
690 list_for_each_entry(path, &widget->sinks, list_source) {
691 DAPM_UPDATE_STAT(widget, neighbour_checks);
692
693 if (path->weak)
694 continue;
695
696 if (path->walked)
697 continue;
698
699 if (path->sink && path->connect) {
700 path->walked = 1;
701 con += is_connected_output_ep(path->sink);
702 }
703 }
704
705 return con;
706 }
707
708 /*
709 * Recursively check for a completed path to an active or physically connected
710 * input widget. Returns number of complete paths.
711 */
712 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
713 {
714 struct snd_soc_dapm_path *path;
715 int con = 0;
716
717 DAPM_UPDATE_STAT(widget, path_checks);
718
719 if (widget->id == snd_soc_dapm_supply)
720 return 0;
721
722 /* active stream ? */
723 switch (widget->id) {
724 case snd_soc_dapm_dac:
725 case snd_soc_dapm_aif_in:
726 if (widget->active)
727 return snd_soc_dapm_suspend_check(widget);
728 default:
729 break;
730 }
731
732 if (widget->connected) {
733 /* connected pin ? */
734 if (widget->id == snd_soc_dapm_input && !widget->ext)
735 return snd_soc_dapm_suspend_check(widget);
736
737 /* connected VMID/Bias for lower pops */
738 if (widget->id == snd_soc_dapm_vmid)
739 return snd_soc_dapm_suspend_check(widget);
740
741 /* connected jack ? */
742 if (widget->id == snd_soc_dapm_mic ||
743 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
744 return snd_soc_dapm_suspend_check(widget);
745 }
746
747 list_for_each_entry(path, &widget->sources, list_sink) {
748 DAPM_UPDATE_STAT(widget, neighbour_checks);
749
750 if (path->weak)
751 continue;
752
753 if (path->walked)
754 continue;
755
756 if (path->source && path->connect) {
757 path->walked = 1;
758 con += is_connected_input_ep(path->source);
759 }
760 }
761
762 return con;
763 }
764
765 /*
766 * Handler for generic register modifier widget.
767 */
768 int dapm_reg_event(struct snd_soc_dapm_widget *w,
769 struct snd_kcontrol *kcontrol, int event)
770 {
771 unsigned int val;
772
773 if (SND_SOC_DAPM_EVENT_ON(event))
774 val = w->on_val;
775 else
776 val = w->off_val;
777
778 soc_widget_update_bits(w, -(w->reg + 1),
779 w->mask << w->shift, val << w->shift);
780
781 return 0;
782 }
783 EXPORT_SYMBOL_GPL(dapm_reg_event);
784
785 static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
786 {
787 if (w->force)
788 return 1;
789 else
790 return w->power_check(w);
791 }
792
793 /* Generic check to see if a widget should be powered.
794 */
795 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
796 {
797 int in, out;
798
799 DAPM_UPDATE_STAT(w, power_checks);
800
801 in = is_connected_input_ep(w);
802 dapm_clear_walk(w->dapm);
803 out = is_connected_output_ep(w);
804 dapm_clear_walk(w->dapm);
805 return out != 0 && in != 0;
806 }
807
808 /* Check to see if an ADC has power */
809 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
810 {
811 int in;
812
813 DAPM_UPDATE_STAT(w, power_checks);
814
815 if (w->active) {
816 in = is_connected_input_ep(w);
817 dapm_clear_walk(w->dapm);
818 return in != 0;
819 } else {
820 return dapm_generic_check_power(w);
821 }
822 }
823
824 /* Check to see if a DAC has power */
825 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
826 {
827 int out;
828
829 DAPM_UPDATE_STAT(w, power_checks);
830
831 if (w->active) {
832 out = is_connected_output_ep(w);
833 dapm_clear_walk(w->dapm);
834 return out != 0;
835 } else {
836 return dapm_generic_check_power(w);
837 }
838 }
839
840 /* Check to see if a power supply is needed */
841 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
842 {
843 struct snd_soc_dapm_path *path;
844 int power = 0;
845
846 DAPM_UPDATE_STAT(w, power_checks);
847
848 /* Check if one of our outputs is connected */
849 list_for_each_entry(path, &w->sinks, list_source) {
850 DAPM_UPDATE_STAT(w, neighbour_checks);
851
852 if (path->weak)
853 continue;
854
855 if (path->connected &&
856 !path->connected(path->source, path->sink))
857 continue;
858
859 if (!path->sink)
860 continue;
861
862 if (dapm_widget_power_check(path->sink)) {
863 power = 1;
864 break;
865 }
866 }
867
868 dapm_clear_walk(w->dapm);
869
870 return power;
871 }
872
873 static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
874 {
875 return 1;
876 }
877
878 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
879 struct snd_soc_dapm_widget *b,
880 bool power_up)
881 {
882 int *sort;
883
884 if (power_up)
885 sort = dapm_up_seq;
886 else
887 sort = dapm_down_seq;
888
889 if (sort[a->id] != sort[b->id])
890 return sort[a->id] - sort[b->id];
891 if (a->subseq != b->subseq) {
892 if (power_up)
893 return a->subseq - b->subseq;
894 else
895 return b->subseq - a->subseq;
896 }
897 if (a->reg != b->reg)
898 return a->reg - b->reg;
899 if (a->dapm != b->dapm)
900 return (unsigned long)a->dapm - (unsigned long)b->dapm;
901
902 return 0;
903 }
904
905 /* Insert a widget in order into a DAPM power sequence. */
906 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
907 struct list_head *list,
908 bool power_up)
909 {
910 struct snd_soc_dapm_widget *w;
911
912 list_for_each_entry(w, list, power_list)
913 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
914 list_add_tail(&new_widget->power_list, &w->power_list);
915 return;
916 }
917
918 list_add_tail(&new_widget->power_list, list);
919 }
920
921 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
922 struct snd_soc_dapm_widget *w, int event)
923 {
924 struct snd_soc_card *card = dapm->card;
925 const char *ev_name;
926 int power, ret;
927
928 switch (event) {
929 case SND_SOC_DAPM_PRE_PMU:
930 ev_name = "PRE_PMU";
931 power = 1;
932 break;
933 case SND_SOC_DAPM_POST_PMU:
934 ev_name = "POST_PMU";
935 power = 1;
936 break;
937 case SND_SOC_DAPM_PRE_PMD:
938 ev_name = "PRE_PMD";
939 power = 0;
940 break;
941 case SND_SOC_DAPM_POST_PMD:
942 ev_name = "POST_PMD";
943 power = 0;
944 break;
945 default:
946 BUG();
947 return;
948 }
949
950 if (w->power != power)
951 return;
952
953 if (w->event && (w->event_flags & event)) {
954 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
955 w->name, ev_name);
956 trace_snd_soc_dapm_widget_event_start(w, event);
957 ret = w->event(w, NULL, event);
958 trace_snd_soc_dapm_widget_event_done(w, event);
959 if (ret < 0)
960 pr_err("%s: %s event failed: %d\n",
961 ev_name, w->name, ret);
962 }
963 }
964
965 /* Apply the coalesced changes from a DAPM sequence */
966 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
967 struct list_head *pending)
968 {
969 struct snd_soc_card *card = dapm->card;
970 struct snd_soc_dapm_widget *w;
971 int reg, power;
972 unsigned int value = 0;
973 unsigned int mask = 0;
974 unsigned int cur_mask;
975
976 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
977 power_list)->reg;
978
979 list_for_each_entry(w, pending, power_list) {
980 cur_mask = 1 << w->shift;
981 BUG_ON(reg != w->reg);
982
983 if (w->invert)
984 power = !w->power;
985 else
986 power = w->power;
987
988 mask |= cur_mask;
989 if (power)
990 value |= cur_mask;
991
992 pop_dbg(dapm->dev, card->pop_time,
993 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
994 w->name, reg, value, mask);
995
996 /* Check for events */
997 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
998 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
999 }
1000
1001 if (reg >= 0) {
1002 /* Any widget will do, they should all be updating the
1003 * same register.
1004 */
1005 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1006 power_list);
1007
1008 pop_dbg(dapm->dev, card->pop_time,
1009 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
1010 value, mask, reg, card->pop_time);
1011 pop_wait(card->pop_time);
1012 soc_widget_update_bits(w, reg, mask, value);
1013 }
1014
1015 list_for_each_entry(w, pending, power_list) {
1016 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1017 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
1018 }
1019 }
1020
1021 /* Apply a DAPM power sequence.
1022 *
1023 * We walk over a pre-sorted list of widgets to apply power to. In
1024 * order to minimise the number of writes to the device required
1025 * multiple widgets will be updated in a single write where possible.
1026 * Currently anything that requires more than a single write is not
1027 * handled.
1028 */
1029 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
1030 struct list_head *list, int event, bool power_up)
1031 {
1032 struct snd_soc_dapm_widget *w, *n;
1033 LIST_HEAD(pending);
1034 int cur_sort = -1;
1035 int cur_subseq = -1;
1036 int cur_reg = SND_SOC_NOPM;
1037 struct snd_soc_dapm_context *cur_dapm = NULL;
1038 int ret, i;
1039 int *sort;
1040
1041 if (power_up)
1042 sort = dapm_up_seq;
1043 else
1044 sort = dapm_down_seq;
1045
1046 list_for_each_entry_safe(w, n, list, power_list) {
1047 ret = 0;
1048
1049 /* Do we need to apply any queued changes? */
1050 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
1051 w->dapm != cur_dapm || w->subseq != cur_subseq) {
1052 if (!list_empty(&pending))
1053 dapm_seq_run_coalesced(cur_dapm, &pending);
1054
1055 if (cur_dapm && cur_dapm->seq_notifier) {
1056 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1057 if (sort[i] == cur_sort)
1058 cur_dapm->seq_notifier(cur_dapm,
1059 i,
1060 cur_subseq);
1061 }
1062
1063 INIT_LIST_HEAD(&pending);
1064 cur_sort = -1;
1065 cur_subseq = INT_MIN;
1066 cur_reg = SND_SOC_NOPM;
1067 cur_dapm = NULL;
1068 }
1069
1070 switch (w->id) {
1071 case snd_soc_dapm_pre:
1072 if (!w->event)
1073 list_for_each_entry_safe_continue(w, n, list,
1074 power_list);
1075
1076 if (event == SND_SOC_DAPM_STREAM_START)
1077 ret = w->event(w,
1078 NULL, SND_SOC_DAPM_PRE_PMU);
1079 else if (event == SND_SOC_DAPM_STREAM_STOP)
1080 ret = w->event(w,
1081 NULL, SND_SOC_DAPM_PRE_PMD);
1082 break;
1083
1084 case snd_soc_dapm_post:
1085 if (!w->event)
1086 list_for_each_entry_safe_continue(w, n, list,
1087 power_list);
1088
1089 if (event == SND_SOC_DAPM_STREAM_START)
1090 ret = w->event(w,
1091 NULL, SND_SOC_DAPM_POST_PMU);
1092 else if (event == SND_SOC_DAPM_STREAM_STOP)
1093 ret = w->event(w,
1094 NULL, SND_SOC_DAPM_POST_PMD);
1095 break;
1096
1097 default:
1098 /* Queue it up for application */
1099 cur_sort = sort[w->id];
1100 cur_subseq = w->subseq;
1101 cur_reg = w->reg;
1102 cur_dapm = w->dapm;
1103 list_move(&w->power_list, &pending);
1104 break;
1105 }
1106
1107 if (ret < 0)
1108 dev_err(w->dapm->dev,
1109 "Failed to apply widget power: %d\n", ret);
1110 }
1111
1112 if (!list_empty(&pending))
1113 dapm_seq_run_coalesced(cur_dapm, &pending);
1114
1115 if (cur_dapm && cur_dapm->seq_notifier) {
1116 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1117 if (sort[i] == cur_sort)
1118 cur_dapm->seq_notifier(cur_dapm,
1119 i, cur_subseq);
1120 }
1121 }
1122
1123 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1124 {
1125 struct snd_soc_dapm_update *update = dapm->update;
1126 struct snd_soc_dapm_widget *w;
1127 int ret;
1128
1129 if (!update)
1130 return;
1131
1132 w = update->widget;
1133
1134 if (w->event &&
1135 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1136 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1137 if (ret != 0)
1138 pr_err("%s DAPM pre-event failed: %d\n",
1139 w->name, ret);
1140 }
1141
1142 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
1143 update->val);
1144 if (ret < 0)
1145 pr_err("%s DAPM update failed: %d\n", w->name, ret);
1146
1147 if (w->event &&
1148 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1149 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1150 if (ret != 0)
1151 pr_err("%s DAPM post-event failed: %d\n",
1152 w->name, ret);
1153 }
1154 }
1155
1156 /* Async callback run prior to DAPM sequences - brings to _PREPARE if
1157 * they're changing state.
1158 */
1159 static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1160 {
1161 struct snd_soc_dapm_context *d = data;
1162 int ret;
1163
1164 /* If we're off and we're not supposed to be go into STANDBY */
1165 if (d->bias_level == SND_SOC_BIAS_OFF &&
1166 d->target_bias_level != SND_SOC_BIAS_OFF) {
1167 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1168 if (ret != 0)
1169 dev_err(d->dev,
1170 "Failed to turn on bias: %d\n", ret);
1171 }
1172
1173 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1174 if (d->bias_level != d->target_bias_level) {
1175 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1176 if (ret != 0)
1177 dev_err(d->dev,
1178 "Failed to prepare bias: %d\n", ret);
1179 }
1180 }
1181
1182 /* Async callback run prior to DAPM sequences - brings to their final
1183 * state.
1184 */
1185 static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1186 {
1187 struct snd_soc_dapm_context *d = data;
1188 int ret;
1189
1190 /* If we just powered the last thing off drop to standby bias */
1191 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1192 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1193 d->target_bias_level == SND_SOC_BIAS_OFF)) {
1194 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1195 if (ret != 0)
1196 dev_err(d->dev, "Failed to apply standby bias: %d\n",
1197 ret);
1198 }
1199
1200 /* If we're in standby and can support bias off then do that */
1201 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1202 d->target_bias_level == SND_SOC_BIAS_OFF) {
1203 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1204 if (ret != 0)
1205 dev_err(d->dev, "Failed to turn off bias: %d\n", ret);
1206 }
1207
1208 /* If we just powered up then move to active bias */
1209 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1210 d->target_bias_level == SND_SOC_BIAS_ON) {
1211 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1212 if (ret != 0)
1213 dev_err(d->dev, "Failed to apply active bias: %d\n",
1214 ret);
1215 }
1216 }
1217
1218 static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1219 struct list_head *up_list,
1220 struct list_head *down_list)
1221 {
1222 struct snd_soc_dapm_path *path;
1223
1224 if (w->power == power)
1225 return;
1226
1227 trace_snd_soc_dapm_widget_power(w, power);
1228
1229 /* If we changed our power state perhaps our neigbours changed
1230 * also. We're not yet smart enough to update relevant
1231 * neighbours when we change the state of a widget, this acts
1232 * as a proxy for that. It will notify more neighbours than
1233 * is ideal.
1234 */
1235 list_for_each_entry(path, &w->sources, list_sink) {
1236 if (path->source) {
1237 dapm_mark_dirty(path->source);
1238 }
1239 }
1240 list_for_each_entry(path, &w->sinks, list_source) {
1241 if (path->sink) {
1242 dapm_mark_dirty(path->sink);
1243 }
1244 }
1245
1246 if (power)
1247 dapm_seq_insert(w, up_list, true);
1248 else
1249 dapm_seq_insert(w, down_list, false);
1250
1251 w->power = power;
1252 }
1253
1254 static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1255 struct list_head *up_list,
1256 struct list_head *down_list)
1257 {
1258 int power;
1259
1260 switch (w->id) {
1261 case snd_soc_dapm_pre:
1262 dapm_seq_insert(w, down_list, false);
1263 break;
1264 case snd_soc_dapm_post:
1265 dapm_seq_insert(w, up_list, true);
1266 break;
1267
1268 default:
1269 power = dapm_widget_power_check(w);
1270
1271 dapm_widget_set_power(w, power, up_list, down_list);
1272 break;
1273 }
1274 }
1275
1276 /*
1277 * Scan each dapm widget for complete audio path.
1278 * A complete path is a route that has valid endpoints i.e.:-
1279 *
1280 * o DAC to output pin.
1281 * o Input Pin to ADC.
1282 * o Input pin to Output pin (bypass, sidetone)
1283 * o DAC to ADC (loopback).
1284 */
1285 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1286 {
1287 struct snd_soc_card *card = dapm->card;
1288 struct snd_soc_dapm_widget *w;
1289 struct snd_soc_dapm_context *d;
1290 LIST_HEAD(up_list);
1291 LIST_HEAD(down_list);
1292 LIST_HEAD(async_domain);
1293 enum snd_soc_bias_level bias;
1294
1295 trace_snd_soc_dapm_start(card);
1296
1297 list_for_each_entry(d, &card->dapm_list, list) {
1298 if (d->n_widgets || d->codec == NULL) {
1299 if (d->idle_bias_off)
1300 d->target_bias_level = SND_SOC_BIAS_OFF;
1301 else
1302 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1303 }
1304 }
1305
1306 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
1307
1308 /* Check which widgets we need to power and store them in
1309 * lists indicating if they should be powered up or down. We
1310 * only check widgets that have been flagged as dirty but note
1311 * that new widgets may be added to the dirty list while we
1312 * iterate.
1313 */
1314 list_for_each_entry(w, &card->dapm_dirty, dirty) {
1315 dapm_power_one_widget(w, &up_list, &down_list);
1316 }
1317
1318 list_for_each_entry(w, &card->widgets, list) {
1319 list_del_init(&w->dirty);
1320
1321 if (w->power) {
1322 d = w->dapm;
1323
1324 /* Supplies and micbiases only bring the
1325 * context up to STANDBY as unless something
1326 * else is active and passing audio they
1327 * generally don't require full power.
1328 */
1329 switch (w->id) {
1330 case snd_soc_dapm_supply:
1331 case snd_soc_dapm_micbias:
1332 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1333 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1334 break;
1335 default:
1336 d->target_bias_level = SND_SOC_BIAS_ON;
1337 break;
1338 }
1339 }
1340
1341 }
1342
1343 /* If there are no DAPM widgets then try to figure out power from the
1344 * event type.
1345 */
1346 if (!dapm->n_widgets) {
1347 switch (event) {
1348 case SND_SOC_DAPM_STREAM_START:
1349 case SND_SOC_DAPM_STREAM_RESUME:
1350 dapm->target_bias_level = SND_SOC_BIAS_ON;
1351 break;
1352 case SND_SOC_DAPM_STREAM_STOP:
1353 if (dapm->codec->active)
1354 dapm->target_bias_level = SND_SOC_BIAS_ON;
1355 else
1356 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1357 break;
1358 case SND_SOC_DAPM_STREAM_SUSPEND:
1359 dapm->target_bias_level = SND_SOC_BIAS_STANDBY;
1360 break;
1361 case SND_SOC_DAPM_STREAM_NOP:
1362 dapm->target_bias_level = dapm->bias_level;
1363 break;
1364 default:
1365 break;
1366 }
1367 }
1368
1369 /* Force all contexts in the card to the same bias state if
1370 * they're not ground referenced.
1371 */
1372 bias = SND_SOC_BIAS_OFF;
1373 list_for_each_entry(d, &card->dapm_list, list)
1374 if (d->target_bias_level > bias)
1375 bias = d->target_bias_level;
1376 list_for_each_entry(d, &card->dapm_list, list)
1377 if (!d->idle_bias_off)
1378 d->target_bias_level = bias;
1379
1380 trace_snd_soc_dapm_walk_done(card);
1381
1382 /* Run all the bias changes in parallel */
1383 list_for_each_entry(d, &dapm->card->dapm_list, list)
1384 async_schedule_domain(dapm_pre_sequence_async, d,
1385 &async_domain);
1386 async_synchronize_full_domain(&async_domain);
1387
1388 /* Power down widgets first; try to avoid amplifying pops. */
1389 dapm_seq_run(dapm, &down_list, event, false);
1390
1391 dapm_widget_update(dapm);
1392
1393 /* Now power up. */
1394 dapm_seq_run(dapm, &up_list, event, true);
1395
1396 /* Run all the bias changes in parallel */
1397 list_for_each_entry(d, &dapm->card->dapm_list, list)
1398 async_schedule_domain(dapm_post_sequence_async, d,
1399 &async_domain);
1400 async_synchronize_full_domain(&async_domain);
1401
1402 pop_dbg(dapm->dev, card->pop_time,
1403 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1404 pop_wait(card->pop_time);
1405
1406 trace_snd_soc_dapm_done(card);
1407
1408 return 0;
1409 }
1410
1411 #ifdef CONFIG_DEBUG_FS
1412 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1413 {
1414 file->private_data = inode->i_private;
1415 return 0;
1416 }
1417
1418 static ssize_t dapm_widget_power_read_file(struct file *file,
1419 char __user *user_buf,
1420 size_t count, loff_t *ppos)
1421 {
1422 struct snd_soc_dapm_widget *w = file->private_data;
1423 char *buf;
1424 int in, out;
1425 ssize_t ret;
1426 struct snd_soc_dapm_path *p = NULL;
1427
1428 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1429 if (!buf)
1430 return -ENOMEM;
1431
1432 in = is_connected_input_ep(w);
1433 dapm_clear_walk(w->dapm);
1434 out = is_connected_output_ep(w);
1435 dapm_clear_walk(w->dapm);
1436
1437 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1438 w->name, w->power ? "On" : "Off", in, out);
1439
1440 if (w->reg >= 0)
1441 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1442 " - R%d(0x%x) bit %d",
1443 w->reg, w->reg, w->shift);
1444
1445 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1446
1447 if (w->sname)
1448 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1449 w->sname,
1450 w->active ? "active" : "inactive");
1451
1452 list_for_each_entry(p, &w->sources, list_sink) {
1453 if (p->connected && !p->connected(w, p->sink))
1454 continue;
1455
1456 if (p->connect)
1457 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1458 " in \"%s\" \"%s\"\n",
1459 p->name ? p->name : "static",
1460 p->source->name);
1461 }
1462 list_for_each_entry(p, &w->sinks, list_source) {
1463 if (p->connected && !p->connected(w, p->sink))
1464 continue;
1465
1466 if (p->connect)
1467 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1468 " out \"%s\" \"%s\"\n",
1469 p->name ? p->name : "static",
1470 p->sink->name);
1471 }
1472
1473 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1474
1475 kfree(buf);
1476 return ret;
1477 }
1478
1479 static const struct file_operations dapm_widget_power_fops = {
1480 .open = dapm_widget_power_open_file,
1481 .read = dapm_widget_power_read_file,
1482 .llseek = default_llseek,
1483 };
1484
1485 static int dapm_bias_open_file(struct inode *inode, struct file *file)
1486 {
1487 file->private_data = inode->i_private;
1488 return 0;
1489 }
1490
1491 static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1492 size_t count, loff_t *ppos)
1493 {
1494 struct snd_soc_dapm_context *dapm = file->private_data;
1495 char *level;
1496
1497 switch (dapm->bias_level) {
1498 case SND_SOC_BIAS_ON:
1499 level = "On\n";
1500 break;
1501 case SND_SOC_BIAS_PREPARE:
1502 level = "Prepare\n";
1503 break;
1504 case SND_SOC_BIAS_STANDBY:
1505 level = "Standby\n";
1506 break;
1507 case SND_SOC_BIAS_OFF:
1508 level = "Off\n";
1509 break;
1510 default:
1511 BUG();
1512 level = "Unknown\n";
1513 break;
1514 }
1515
1516 return simple_read_from_buffer(user_buf, count, ppos, level,
1517 strlen(level));
1518 }
1519
1520 static const struct file_operations dapm_bias_fops = {
1521 .open = dapm_bias_open_file,
1522 .read = dapm_bias_read_file,
1523 .llseek = default_llseek,
1524 };
1525
1526 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1527 struct dentry *parent)
1528 {
1529 struct dentry *d;
1530
1531 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1532
1533 if (!dapm->debugfs_dapm) {
1534 printk(KERN_WARNING
1535 "Failed to create DAPM debugfs directory\n");
1536 return;
1537 }
1538
1539 d = debugfs_create_file("bias_level", 0444,
1540 dapm->debugfs_dapm, dapm,
1541 &dapm_bias_fops);
1542 if (!d)
1543 dev_warn(dapm->dev,
1544 "ASoC: Failed to create bias level debugfs file\n");
1545 }
1546
1547 static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1548 {
1549 struct snd_soc_dapm_context *dapm = w->dapm;
1550 struct dentry *d;
1551
1552 if (!dapm->debugfs_dapm || !w->name)
1553 return;
1554
1555 d = debugfs_create_file(w->name, 0444,
1556 dapm->debugfs_dapm, w,
1557 &dapm_widget_power_fops);
1558 if (!d)
1559 dev_warn(w->dapm->dev,
1560 "ASoC: Failed to create %s debugfs file\n",
1561 w->name);
1562 }
1563
1564 static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1565 {
1566 debugfs_remove_recursive(dapm->debugfs_dapm);
1567 }
1568
1569 #else
1570 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1571 struct dentry *parent)
1572 {
1573 }
1574
1575 static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1576 {
1577 }
1578
1579 static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1580 {
1581 }
1582
1583 #endif
1584
1585 /* test and update the power status of a mux widget */
1586 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1587 struct snd_kcontrol *kcontrol, int change,
1588 int mux, struct soc_enum *e)
1589 {
1590 struct snd_soc_dapm_path *path;
1591 int found = 0;
1592
1593 if (widget->id != snd_soc_dapm_mux &&
1594 widget->id != snd_soc_dapm_virt_mux &&
1595 widget->id != snd_soc_dapm_value_mux)
1596 return -ENODEV;
1597
1598 if (!change)
1599 return 0;
1600
1601 /* find dapm widget path assoc with kcontrol */
1602 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1603 if (path->kcontrol != kcontrol)
1604 continue;
1605
1606 if (!path->name || !e->texts[mux])
1607 continue;
1608
1609 found = 1;
1610 /* we now need to match the string in the enum to the path */
1611 if (!(strcmp(path->name, e->texts[mux]))) {
1612 path->connect = 1; /* new connection */
1613 dapm_mark_dirty(path->source);
1614 } else {
1615 if (path->connect)
1616 dapm_mark_dirty(path->source);
1617 path->connect = 0; /* old connection must be powered down */
1618 }
1619 }
1620
1621 if (found) {
1622 dapm_mark_dirty(widget);
1623 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1624 }
1625
1626 return 0;
1627 }
1628
1629 /* test and update the power status of a mixer or switch widget */
1630 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1631 struct snd_kcontrol *kcontrol, int connect)
1632 {
1633 struct snd_soc_dapm_path *path;
1634 int found = 0;
1635
1636 if (widget->id != snd_soc_dapm_mixer &&
1637 widget->id != snd_soc_dapm_mixer_named_ctl &&
1638 widget->id != snd_soc_dapm_switch)
1639 return -ENODEV;
1640
1641 /* find dapm widget path assoc with kcontrol */
1642 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1643 if (path->kcontrol != kcontrol)
1644 continue;
1645
1646 /* found, now check type */
1647 found = 1;
1648 path->connect = connect;
1649 dapm_mark_dirty(path->source);
1650 }
1651
1652 if (found) {
1653 dapm_mark_dirty(widget);
1654 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1655 }
1656
1657 return 0;
1658 }
1659
1660 /* show dapm widget status in sys fs */
1661 static ssize_t dapm_widget_show(struct device *dev,
1662 struct device_attribute *attr, char *buf)
1663 {
1664 struct snd_soc_pcm_runtime *rtd =
1665 container_of(dev, struct snd_soc_pcm_runtime, dev);
1666 struct snd_soc_codec *codec =rtd->codec;
1667 struct snd_soc_dapm_widget *w;
1668 int count = 0;
1669 char *state = "not set";
1670
1671 list_for_each_entry(w, &codec->card->widgets, list) {
1672 if (w->dapm != &codec->dapm)
1673 continue;
1674
1675 /* only display widgets that burnm power */
1676 switch (w->id) {
1677 case snd_soc_dapm_hp:
1678 case snd_soc_dapm_mic:
1679 case snd_soc_dapm_spk:
1680 case snd_soc_dapm_line:
1681 case snd_soc_dapm_micbias:
1682 case snd_soc_dapm_dac:
1683 case snd_soc_dapm_adc:
1684 case snd_soc_dapm_pga:
1685 case snd_soc_dapm_out_drv:
1686 case snd_soc_dapm_mixer:
1687 case snd_soc_dapm_mixer_named_ctl:
1688 case snd_soc_dapm_supply:
1689 if (w->name)
1690 count += sprintf(buf + count, "%s: %s\n",
1691 w->name, w->power ? "On":"Off");
1692 break;
1693 default:
1694 break;
1695 }
1696 }
1697
1698 switch (codec->dapm.bias_level) {
1699 case SND_SOC_BIAS_ON:
1700 state = "On";
1701 break;
1702 case SND_SOC_BIAS_PREPARE:
1703 state = "Prepare";
1704 break;
1705 case SND_SOC_BIAS_STANDBY:
1706 state = "Standby";
1707 break;
1708 case SND_SOC_BIAS_OFF:
1709 state = "Off";
1710 break;
1711 }
1712 count += sprintf(buf + count, "PM State: %s\n", state);
1713
1714 return count;
1715 }
1716
1717 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1718
1719 int snd_soc_dapm_sys_add(struct device *dev)
1720 {
1721 return device_create_file(dev, &dev_attr_dapm_widget);
1722 }
1723
1724 static void snd_soc_dapm_sys_remove(struct device *dev)
1725 {
1726 device_remove_file(dev, &dev_attr_dapm_widget);
1727 }
1728
1729 /* free all dapm widgets and resources */
1730 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1731 {
1732 struct snd_soc_dapm_widget *w, *next_w;
1733 struct snd_soc_dapm_path *p, *next_p;
1734
1735 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1736 if (w->dapm != dapm)
1737 continue;
1738 list_del(&w->list);
1739 /*
1740 * remove source and sink paths associated to this widget.
1741 * While removing the path, remove reference to it from both
1742 * source and sink widgets so that path is removed only once.
1743 */
1744 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1745 list_del(&p->list_sink);
1746 list_del(&p->list_source);
1747 list_del(&p->list);
1748 kfree(p->long_name);
1749 kfree(p);
1750 }
1751 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1752 list_del(&p->list_sink);
1753 list_del(&p->list_source);
1754 list_del(&p->list);
1755 kfree(p->long_name);
1756 kfree(p);
1757 }
1758 kfree(w->kcontrols);
1759 kfree(w->name);
1760 kfree(w);
1761 }
1762 }
1763
1764 static struct snd_soc_dapm_widget *dapm_find_widget(
1765 struct snd_soc_dapm_context *dapm, const char *pin,
1766 bool search_other_contexts)
1767 {
1768 struct snd_soc_dapm_widget *w;
1769 struct snd_soc_dapm_widget *fallback = NULL;
1770
1771 list_for_each_entry(w, &dapm->card->widgets, list) {
1772 if (!strcmp(w->name, pin)) {
1773 if (w->dapm == dapm)
1774 return w;
1775 else
1776 fallback = w;
1777 }
1778 }
1779
1780 if (search_other_contexts)
1781 return fallback;
1782
1783 return NULL;
1784 }
1785
1786 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1787 const char *pin, int status)
1788 {
1789 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
1790
1791 if (!w) {
1792 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1793 return -EINVAL;
1794 }
1795
1796 w->connected = status;
1797 if (status == 0)
1798 w->force = 0;
1799 dapm_mark_dirty(w);
1800
1801 return 0;
1802 }
1803
1804 /**
1805 * snd_soc_dapm_sync - scan and power dapm paths
1806 * @dapm: DAPM context
1807 *
1808 * Walks all dapm audio paths and powers widgets according to their
1809 * stream or path usage.
1810 *
1811 * Returns 0 for success.
1812 */
1813 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1814 {
1815 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1816 }
1817 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1818
1819 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1820 const struct snd_soc_dapm_route *route)
1821 {
1822 struct snd_soc_dapm_path *path;
1823 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1824 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1825 const char *sink;
1826 const char *control = route->control;
1827 const char *source;
1828 char prefixed_sink[80];
1829 char prefixed_source[80];
1830 int ret = 0;
1831
1832 if (dapm->codec && dapm->codec->name_prefix) {
1833 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1834 dapm->codec->name_prefix, route->sink);
1835 sink = prefixed_sink;
1836 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1837 dapm->codec->name_prefix, route->source);
1838 source = prefixed_source;
1839 } else {
1840 sink = route->sink;
1841 source = route->source;
1842 }
1843
1844 /*
1845 * find src and dest widgets over all widgets but favor a widget from
1846 * current DAPM context
1847 */
1848 list_for_each_entry(w, &dapm->card->widgets, list) {
1849 if (!wsink && !(strcmp(w->name, sink))) {
1850 wtsink = w;
1851 if (w->dapm == dapm)
1852 wsink = w;
1853 continue;
1854 }
1855 if (!wsource && !(strcmp(w->name, source))) {
1856 wtsource = w;
1857 if (w->dapm == dapm)
1858 wsource = w;
1859 }
1860 }
1861 /* use widget from another DAPM context if not found from this */
1862 if (!wsink)
1863 wsink = wtsink;
1864 if (!wsource)
1865 wsource = wtsource;
1866
1867 if (wsource == NULL || wsink == NULL)
1868 return -ENODEV;
1869
1870 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1871 if (!path)
1872 return -ENOMEM;
1873
1874 path->source = wsource;
1875 path->sink = wsink;
1876 path->connected = route->connected;
1877 INIT_LIST_HEAD(&path->list);
1878 INIT_LIST_HEAD(&path->list_source);
1879 INIT_LIST_HEAD(&path->list_sink);
1880
1881 /* check for external widgets */
1882 if (wsink->id == snd_soc_dapm_input) {
1883 if (wsource->id == snd_soc_dapm_micbias ||
1884 wsource->id == snd_soc_dapm_mic ||
1885 wsource->id == snd_soc_dapm_line ||
1886 wsource->id == snd_soc_dapm_output)
1887 wsink->ext = 1;
1888 }
1889 if (wsource->id == snd_soc_dapm_output) {
1890 if (wsink->id == snd_soc_dapm_spk ||
1891 wsink->id == snd_soc_dapm_hp ||
1892 wsink->id == snd_soc_dapm_line ||
1893 wsink->id == snd_soc_dapm_input)
1894 wsource->ext = 1;
1895 }
1896
1897 /* connect static paths */
1898 if (control == NULL) {
1899 list_add(&path->list, &dapm->card->paths);
1900 list_add(&path->list_sink, &wsink->sources);
1901 list_add(&path->list_source, &wsource->sinks);
1902 path->connect = 1;
1903 return 0;
1904 }
1905
1906 /* connect dynamic paths */
1907 switch (wsink->id) {
1908 case snd_soc_dapm_adc:
1909 case snd_soc_dapm_dac:
1910 case snd_soc_dapm_pga:
1911 case snd_soc_dapm_out_drv:
1912 case snd_soc_dapm_input:
1913 case snd_soc_dapm_output:
1914 case snd_soc_dapm_micbias:
1915 case snd_soc_dapm_vmid:
1916 case snd_soc_dapm_pre:
1917 case snd_soc_dapm_post:
1918 case snd_soc_dapm_supply:
1919 case snd_soc_dapm_aif_in:
1920 case snd_soc_dapm_aif_out:
1921 list_add(&path->list, &dapm->card->paths);
1922 list_add(&path->list_sink, &wsink->sources);
1923 list_add(&path->list_source, &wsource->sinks);
1924 path->connect = 1;
1925 return 0;
1926 case snd_soc_dapm_mux:
1927 case snd_soc_dapm_virt_mux:
1928 case snd_soc_dapm_value_mux:
1929 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1930 &wsink->kcontrol_news[0]);
1931 if (ret != 0)
1932 goto err;
1933 break;
1934 case snd_soc_dapm_switch:
1935 case snd_soc_dapm_mixer:
1936 case snd_soc_dapm_mixer_named_ctl:
1937 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1938 if (ret != 0)
1939 goto err;
1940 break;
1941 case snd_soc_dapm_hp:
1942 case snd_soc_dapm_mic:
1943 case snd_soc_dapm_line:
1944 case snd_soc_dapm_spk:
1945 list_add(&path->list, &dapm->card->paths);
1946 list_add(&path->list_sink, &wsink->sources);
1947 list_add(&path->list_source, &wsource->sinks);
1948 path->connect = 0;
1949 return 0;
1950 }
1951 return 0;
1952
1953 err:
1954 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1955 source, control, sink);
1956 kfree(path);
1957 return ret;
1958 }
1959
1960 /**
1961 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1962 * @dapm: DAPM context
1963 * @route: audio routes
1964 * @num: number of routes
1965 *
1966 * Connects 2 dapm widgets together via a named audio path. The sink is
1967 * the widget receiving the audio signal, whilst the source is the sender
1968 * of the audio signal.
1969 *
1970 * Returns 0 for success else error. On error all resources can be freed
1971 * with a call to snd_soc_card_free().
1972 */
1973 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1974 const struct snd_soc_dapm_route *route, int num)
1975 {
1976 int i, ret;
1977
1978 for (i = 0; i < num; i++) {
1979 ret = snd_soc_dapm_add_route(dapm, route);
1980 if (ret < 0) {
1981 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1982 route->source, route->sink);
1983 return ret;
1984 }
1985 route++;
1986 }
1987
1988 return 0;
1989 }
1990 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1991
1992 static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
1993 const struct snd_soc_dapm_route *route)
1994 {
1995 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
1996 route->source,
1997 true);
1998 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
1999 route->sink,
2000 true);
2001 struct snd_soc_dapm_path *path;
2002 int count = 0;
2003
2004 if (!source) {
2005 dev_err(dapm->dev, "Unable to find source %s for weak route\n",
2006 route->source);
2007 return -ENODEV;
2008 }
2009
2010 if (!sink) {
2011 dev_err(dapm->dev, "Unable to find sink %s for weak route\n",
2012 route->sink);
2013 return -ENODEV;
2014 }
2015
2016 if (route->control || route->connected)
2017 dev_warn(dapm->dev, "Ignoring control for weak route %s->%s\n",
2018 route->source, route->sink);
2019
2020 list_for_each_entry(path, &source->sinks, list_source) {
2021 if (path->sink == sink) {
2022 path->weak = 1;
2023 count++;
2024 }
2025 }
2026
2027 if (count == 0)
2028 dev_err(dapm->dev, "No path found for weak route %s->%s\n",
2029 route->source, route->sink);
2030 if (count > 1)
2031 dev_warn(dapm->dev, "%d paths found for weak route %s->%s\n",
2032 count, route->source, route->sink);
2033
2034 return 0;
2035 }
2036
2037 /**
2038 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2039 * @dapm: DAPM context
2040 * @route: audio routes
2041 * @num: number of routes
2042 *
2043 * Mark existing routes matching those specified in the passed array
2044 * as being weak, meaning that they are ignored for the purpose of
2045 * power decisions. The main intended use case is for sidetone paths
2046 * which couple audio between other independent paths if they are both
2047 * active in order to make the combination work better at the user
2048 * level but which aren't intended to be "used".
2049 *
2050 * Note that CODEC drivers should not use this as sidetone type paths
2051 * can frequently also be used as bypass paths.
2052 */
2053 int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2054 const struct snd_soc_dapm_route *route, int num)
2055 {
2056 int i, err;
2057 int ret = 0;
2058
2059 for (i = 0; i < num; i++) {
2060 err = snd_soc_dapm_weak_route(dapm, route);
2061 if (err)
2062 ret = err;
2063 route++;
2064 }
2065
2066 return ret;
2067 }
2068 EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2069
2070 /**
2071 * snd_soc_dapm_new_widgets - add new dapm widgets
2072 * @dapm: DAPM context
2073 *
2074 * Checks the codec for any new dapm widgets and creates them if found.
2075 *
2076 * Returns 0 for success.
2077 */
2078 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2079 {
2080 struct snd_soc_dapm_widget *w;
2081 unsigned int val;
2082
2083 list_for_each_entry(w, &dapm->card->widgets, list)
2084 {
2085 if (w->new)
2086 continue;
2087
2088 if (w->num_kcontrols) {
2089 w->kcontrols = kzalloc(w->num_kcontrols *
2090 sizeof(struct snd_kcontrol *),
2091 GFP_KERNEL);
2092 if (!w->kcontrols)
2093 return -ENOMEM;
2094 }
2095
2096 switch(w->id) {
2097 case snd_soc_dapm_switch:
2098 case snd_soc_dapm_mixer:
2099 case snd_soc_dapm_mixer_named_ctl:
2100 w->power_check = dapm_generic_check_power;
2101 dapm_new_mixer(w);
2102 break;
2103 case snd_soc_dapm_mux:
2104 case snd_soc_dapm_virt_mux:
2105 case snd_soc_dapm_value_mux:
2106 w->power_check = dapm_generic_check_power;
2107 dapm_new_mux(w);
2108 break;
2109 case snd_soc_dapm_adc:
2110 case snd_soc_dapm_aif_out:
2111 w->power_check = dapm_adc_check_power;
2112 break;
2113 case snd_soc_dapm_dac:
2114 case snd_soc_dapm_aif_in:
2115 w->power_check = dapm_dac_check_power;
2116 break;
2117 case snd_soc_dapm_pga:
2118 case snd_soc_dapm_out_drv:
2119 w->power_check = dapm_generic_check_power;
2120 dapm_new_pga(w);
2121 break;
2122 case snd_soc_dapm_input:
2123 case snd_soc_dapm_output:
2124 case snd_soc_dapm_micbias:
2125 case snd_soc_dapm_spk:
2126 case snd_soc_dapm_hp:
2127 case snd_soc_dapm_mic:
2128 case snd_soc_dapm_line:
2129 w->power_check = dapm_generic_check_power;
2130 break;
2131 case snd_soc_dapm_supply:
2132 w->power_check = dapm_supply_check_power;
2133 case snd_soc_dapm_vmid:
2134 case snd_soc_dapm_pre:
2135 case snd_soc_dapm_post:
2136 break;
2137 }
2138
2139 if (!w->power_check)
2140 w->power_check = dapm_always_on_check_power;
2141
2142 /* Read the initial power state from the device */
2143 if (w->reg >= 0) {
2144 val = soc_widget_read(w, w->reg);
2145 val &= 1 << w->shift;
2146 if (w->invert)
2147 val = !val;
2148
2149 if (val)
2150 w->power = 1;
2151 }
2152
2153 w->new = 1;
2154
2155 list_add(&w->dirty, &(w->dapm->card->dapm_dirty));
2156 dapm_debugfs_add_widget(w);
2157 }
2158
2159 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2160 return 0;
2161 }
2162 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2163
2164 /**
2165 * snd_soc_dapm_get_volsw - dapm mixer get callback
2166 * @kcontrol: mixer control
2167 * @ucontrol: control element information
2168 *
2169 * Callback to get the value of a dapm mixer control.
2170 *
2171 * Returns 0 for success.
2172 */
2173 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2174 struct snd_ctl_elem_value *ucontrol)
2175 {
2176 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2177 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2178 struct soc_mixer_control *mc =
2179 (struct soc_mixer_control *)kcontrol->private_value;
2180 unsigned int reg = mc->reg;
2181 unsigned int shift = mc->shift;
2182 unsigned int rshift = mc->rshift;
2183 int max = mc->max;
2184 unsigned int invert = mc->invert;
2185 unsigned int mask = (1 << fls(max)) - 1;
2186
2187 ucontrol->value.integer.value[0] =
2188 (snd_soc_read(widget->codec, reg) >> shift) & mask;
2189 if (shift != rshift)
2190 ucontrol->value.integer.value[1] =
2191 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
2192 if (invert) {
2193 ucontrol->value.integer.value[0] =
2194 max - ucontrol->value.integer.value[0];
2195 if (shift != rshift)
2196 ucontrol->value.integer.value[1] =
2197 max - ucontrol->value.integer.value[1];
2198 }
2199
2200 return 0;
2201 }
2202 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2203
2204 /**
2205 * snd_soc_dapm_put_volsw - dapm mixer set callback
2206 * @kcontrol: mixer control
2207 * @ucontrol: control element information
2208 *
2209 * Callback to set the value of a dapm mixer control.
2210 *
2211 * Returns 0 for success.
2212 */
2213 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2214 struct snd_ctl_elem_value *ucontrol)
2215 {
2216 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2217 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2218 struct snd_soc_codec *codec = widget->codec;
2219 struct soc_mixer_control *mc =
2220 (struct soc_mixer_control *)kcontrol->private_value;
2221 unsigned int reg = mc->reg;
2222 unsigned int shift = mc->shift;
2223 int max = mc->max;
2224 unsigned int mask = (1 << fls(max)) - 1;
2225 unsigned int invert = mc->invert;
2226 unsigned int val;
2227 int connect, change;
2228 struct snd_soc_dapm_update update;
2229 int wi;
2230
2231 val = (ucontrol->value.integer.value[0] & mask);
2232
2233 if (invert)
2234 val = max - val;
2235 mask = mask << shift;
2236 val = val << shift;
2237
2238 if (val)
2239 /* new connection */
2240 connect = invert ? 0 : 1;
2241 else
2242 /* old connection must be powered down */
2243 connect = invert ? 1 : 0;
2244
2245 mutex_lock(&codec->mutex);
2246
2247 change = snd_soc_test_bits(widget->codec, reg, mask, val);
2248 if (change) {
2249 for (wi = 0; wi < wlist->num_widgets; wi++) {
2250 widget = wlist->widgets[wi];
2251
2252 widget->value = val;
2253
2254 update.kcontrol = kcontrol;
2255 update.widget = widget;
2256 update.reg = reg;
2257 update.mask = mask;
2258 update.val = val;
2259 widget->dapm->update = &update;
2260
2261 dapm_mixer_update_power(widget, kcontrol, connect);
2262
2263 widget->dapm->update = NULL;
2264 }
2265 }
2266
2267 mutex_unlock(&codec->mutex);
2268 return 0;
2269 }
2270 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2271
2272 /**
2273 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2274 * @kcontrol: mixer control
2275 * @ucontrol: control element information
2276 *
2277 * Callback to get the value of a dapm enumerated double mixer control.
2278 *
2279 * Returns 0 for success.
2280 */
2281 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2282 struct snd_ctl_elem_value *ucontrol)
2283 {
2284 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2285 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2286 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2287 unsigned int val, bitmask;
2288
2289 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2290 ;
2291 val = snd_soc_read(widget->codec, e->reg);
2292 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
2293 if (e->shift_l != e->shift_r)
2294 ucontrol->value.enumerated.item[1] =
2295 (val >> e->shift_r) & (bitmask - 1);
2296
2297 return 0;
2298 }
2299 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2300
2301 /**
2302 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2303 * @kcontrol: mixer control
2304 * @ucontrol: control element information
2305 *
2306 * Callback to set the value of a dapm enumerated double mixer control.
2307 *
2308 * Returns 0 for success.
2309 */
2310 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2311 struct snd_ctl_elem_value *ucontrol)
2312 {
2313 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2314 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2315 struct snd_soc_codec *codec = widget->codec;
2316 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2317 unsigned int val, mux, change;
2318 unsigned int mask, bitmask;
2319 struct snd_soc_dapm_update update;
2320 int wi;
2321
2322 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
2323 ;
2324 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2325 return -EINVAL;
2326 mux = ucontrol->value.enumerated.item[0];
2327 val = mux << e->shift_l;
2328 mask = (bitmask - 1) << e->shift_l;
2329 if (e->shift_l != e->shift_r) {
2330 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2331 return -EINVAL;
2332 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2333 mask |= (bitmask - 1) << e->shift_r;
2334 }
2335
2336 mutex_lock(&codec->mutex);
2337
2338 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2339 if (change) {
2340 for (wi = 0; wi < wlist->num_widgets; wi++) {
2341 widget = wlist->widgets[wi];
2342
2343 widget->value = val;
2344
2345 update.kcontrol = kcontrol;
2346 update.widget = widget;
2347 update.reg = e->reg;
2348 update.mask = mask;
2349 update.val = val;
2350 widget->dapm->update = &update;
2351
2352 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2353
2354 widget->dapm->update = NULL;
2355 }
2356 }
2357
2358 mutex_unlock(&codec->mutex);
2359 return change;
2360 }
2361 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2362
2363 /**
2364 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2365 * @kcontrol: mixer control
2366 * @ucontrol: control element information
2367 *
2368 * Returns 0 for success.
2369 */
2370 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2371 struct snd_ctl_elem_value *ucontrol)
2372 {
2373 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2374 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2375
2376 ucontrol->value.enumerated.item[0] = widget->value;
2377
2378 return 0;
2379 }
2380 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2381
2382 /**
2383 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2384 * @kcontrol: mixer control
2385 * @ucontrol: control element information
2386 *
2387 * Returns 0 for success.
2388 */
2389 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2390 struct snd_ctl_elem_value *ucontrol)
2391 {
2392 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2393 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2394 struct snd_soc_codec *codec = widget->codec;
2395 struct soc_enum *e =
2396 (struct soc_enum *)kcontrol->private_value;
2397 int change;
2398 int ret = 0;
2399 int wi;
2400
2401 if (ucontrol->value.enumerated.item[0] >= e->max)
2402 return -EINVAL;
2403
2404 mutex_lock(&codec->mutex);
2405
2406 change = widget->value != ucontrol->value.enumerated.item[0];
2407 if (change) {
2408 for (wi = 0; wi < wlist->num_widgets; wi++) {
2409 widget = wlist->widgets[wi];
2410
2411 widget->value = ucontrol->value.enumerated.item[0];
2412
2413 dapm_mux_update_power(widget, kcontrol, change,
2414 widget->value, e);
2415 }
2416 }
2417
2418 mutex_unlock(&codec->mutex);
2419 return ret;
2420 }
2421 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2422
2423 /**
2424 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2425 * callback
2426 * @kcontrol: mixer control
2427 * @ucontrol: control element information
2428 *
2429 * Callback to get the value of a dapm semi enumerated double mixer control.
2430 *
2431 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2432 * used for handling bitfield coded enumeration for example.
2433 *
2434 * Returns 0 for success.
2435 */
2436 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2437 struct snd_ctl_elem_value *ucontrol)
2438 {
2439 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2440 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2441 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2442 unsigned int reg_val, val, mux;
2443
2444 reg_val = snd_soc_read(widget->codec, e->reg);
2445 val = (reg_val >> e->shift_l) & e->mask;
2446 for (mux = 0; mux < e->max; mux++) {
2447 if (val == e->values[mux])
2448 break;
2449 }
2450 ucontrol->value.enumerated.item[0] = mux;
2451 if (e->shift_l != e->shift_r) {
2452 val = (reg_val >> e->shift_r) & e->mask;
2453 for (mux = 0; mux < e->max; mux++) {
2454 if (val == e->values[mux])
2455 break;
2456 }
2457 ucontrol->value.enumerated.item[1] = mux;
2458 }
2459
2460 return 0;
2461 }
2462 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2463
2464 /**
2465 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2466 * callback
2467 * @kcontrol: mixer control
2468 * @ucontrol: control element information
2469 *
2470 * Callback to set the value of a dapm semi enumerated double mixer control.
2471 *
2472 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2473 * used for handling bitfield coded enumeration for example.
2474 *
2475 * Returns 0 for success.
2476 */
2477 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2478 struct snd_ctl_elem_value *ucontrol)
2479 {
2480 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2481 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2482 struct snd_soc_codec *codec = widget->codec;
2483 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2484 unsigned int val, mux, change;
2485 unsigned int mask;
2486 struct snd_soc_dapm_update update;
2487 int wi;
2488
2489 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2490 return -EINVAL;
2491 mux = ucontrol->value.enumerated.item[0];
2492 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2493 mask = e->mask << e->shift_l;
2494 if (e->shift_l != e->shift_r) {
2495 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2496 return -EINVAL;
2497 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2498 mask |= e->mask << e->shift_r;
2499 }
2500
2501 mutex_lock(&codec->mutex);
2502
2503 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2504 if (change) {
2505 for (wi = 0; wi < wlist->num_widgets; wi++) {
2506 widget = wlist->widgets[wi];
2507
2508 widget->value = val;
2509
2510 update.kcontrol = kcontrol;
2511 update.widget = widget;
2512 update.reg = e->reg;
2513 update.mask = mask;
2514 update.val = val;
2515 widget->dapm->update = &update;
2516
2517 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2518
2519 widget->dapm->update = NULL;
2520 }
2521 }
2522
2523 mutex_unlock(&codec->mutex);
2524 return change;
2525 }
2526 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2527
2528 /**
2529 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2530 *
2531 * @kcontrol: mixer control
2532 * @uinfo: control element information
2533 *
2534 * Callback to provide information about a pin switch control.
2535 */
2536 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2537 struct snd_ctl_elem_info *uinfo)
2538 {
2539 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2540 uinfo->count = 1;
2541 uinfo->value.integer.min = 0;
2542 uinfo->value.integer.max = 1;
2543
2544 return 0;
2545 }
2546 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2547
2548 /**
2549 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2550 *
2551 * @kcontrol: mixer control
2552 * @ucontrol: Value
2553 */
2554 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2555 struct snd_ctl_elem_value *ucontrol)
2556 {
2557 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2558 const char *pin = (const char *)kcontrol->private_value;
2559
2560 mutex_lock(&codec->mutex);
2561
2562 ucontrol->value.integer.value[0] =
2563 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2564
2565 mutex_unlock(&codec->mutex);
2566
2567 return 0;
2568 }
2569 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2570
2571 /**
2572 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2573 *
2574 * @kcontrol: mixer control
2575 * @ucontrol: Value
2576 */
2577 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2578 struct snd_ctl_elem_value *ucontrol)
2579 {
2580 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2581 const char *pin = (const char *)kcontrol->private_value;
2582
2583 mutex_lock(&codec->mutex);
2584
2585 if (ucontrol->value.integer.value[0])
2586 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2587 else
2588 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2589
2590 snd_soc_dapm_sync(&codec->dapm);
2591
2592 mutex_unlock(&codec->mutex);
2593
2594 return 0;
2595 }
2596 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2597
2598 /**
2599 * snd_soc_dapm_new_control - create new dapm control
2600 * @dapm: DAPM context
2601 * @widget: widget template
2602 *
2603 * Creates a new dapm control based upon the template.
2604 *
2605 * Returns 0 for success else error.
2606 */
2607 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2608 const struct snd_soc_dapm_widget *widget)
2609 {
2610 struct snd_soc_dapm_widget *w;
2611 size_t name_len;
2612
2613 if ((w = dapm_cnew_widget(widget)) == NULL)
2614 return -ENOMEM;
2615
2616 name_len = strlen(widget->name) + 1;
2617 if (dapm->codec && dapm->codec->name_prefix)
2618 name_len += 1 + strlen(dapm->codec->name_prefix);
2619 w->name = kmalloc(name_len, GFP_KERNEL);
2620 if (w->name == NULL) {
2621 kfree(w);
2622 return -ENOMEM;
2623 }
2624 if (dapm->codec && dapm->codec->name_prefix)
2625 snprintf(w->name, name_len, "%s %s",
2626 dapm->codec->name_prefix, widget->name);
2627 else
2628 snprintf(w->name, name_len, "%s", widget->name);
2629
2630 dapm->n_widgets++;
2631 w->dapm = dapm;
2632 w->codec = dapm->codec;
2633 w->platform = dapm->platform;
2634 INIT_LIST_HEAD(&w->sources);
2635 INIT_LIST_HEAD(&w->sinks);
2636 INIT_LIST_HEAD(&w->list);
2637 INIT_LIST_HEAD(&w->dirty);
2638 list_add(&w->list, &dapm->card->widgets);
2639
2640 /* machine layer set ups unconnected pins and insertions */
2641 w->connected = 1;
2642 return 0;
2643 }
2644 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2645
2646 /**
2647 * snd_soc_dapm_new_controls - create new dapm controls
2648 * @dapm: DAPM context
2649 * @widget: widget array
2650 * @num: number of widgets
2651 *
2652 * Creates new DAPM controls based upon the templates.
2653 *
2654 * Returns 0 for success else error.
2655 */
2656 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2657 const struct snd_soc_dapm_widget *widget,
2658 int num)
2659 {
2660 int i, ret;
2661
2662 for (i = 0; i < num; i++) {
2663 ret = snd_soc_dapm_new_control(dapm, widget);
2664 if (ret < 0) {
2665 dev_err(dapm->dev,
2666 "ASoC: Failed to create DAPM control %s: %d\n",
2667 widget->name, ret);
2668 return ret;
2669 }
2670 widget++;
2671 }
2672 return 0;
2673 }
2674 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2675
2676 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2677 const char *stream, int event)
2678 {
2679 struct snd_soc_dapm_widget *w;
2680
2681 list_for_each_entry(w, &dapm->card->widgets, list)
2682 {
2683 if (!w->sname || w->dapm != dapm)
2684 continue;
2685 dev_vdbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2686 w->name, w->sname, stream, event);
2687 if (strstr(w->sname, stream)) {
2688 dapm_mark_dirty(w);
2689 switch(event) {
2690 case SND_SOC_DAPM_STREAM_START:
2691 w->active = 1;
2692 break;
2693 case SND_SOC_DAPM_STREAM_STOP:
2694 w->active = 0;
2695 break;
2696 case SND_SOC_DAPM_STREAM_SUSPEND:
2697 case SND_SOC_DAPM_STREAM_RESUME:
2698 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2699 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2700 break;
2701 }
2702 }
2703 }
2704
2705 dapm_power_widgets(dapm, event);
2706
2707 /* do we need to notify any clients that DAPM stream is complete */
2708 if (dapm->stream_event)
2709 dapm->stream_event(dapm, event);
2710 }
2711
2712 /**
2713 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2714 * @rtd: PCM runtime data
2715 * @stream: stream name
2716 * @event: stream event
2717 *
2718 * Sends a stream event to the dapm core. The core then makes any
2719 * necessary widget power changes.
2720 *
2721 * Returns 0 for success else error.
2722 */
2723 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2724 const char *stream, int event)
2725 {
2726 struct snd_soc_codec *codec = rtd->codec;
2727
2728 if (stream == NULL)
2729 return 0;
2730
2731 mutex_lock(&codec->mutex);
2732 soc_dapm_stream_event(&codec->dapm, stream, event);
2733 mutex_unlock(&codec->mutex);
2734 return 0;
2735 }
2736
2737 /**
2738 * snd_soc_dapm_enable_pin - enable pin.
2739 * @dapm: DAPM context
2740 * @pin: pin name
2741 *
2742 * Enables input/output pin and its parents or children widgets iff there is
2743 * a valid audio route and active audio stream.
2744 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2745 * do any widget power switching.
2746 */
2747 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2748 {
2749 return snd_soc_dapm_set_pin(dapm, pin, 1);
2750 }
2751 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2752
2753 /**
2754 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2755 * @dapm: DAPM context
2756 * @pin: pin name
2757 *
2758 * Enables input/output pin regardless of any other state. This is
2759 * intended for use with microphone bias supplies used in microphone
2760 * jack detection.
2761 *
2762 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2763 * do any widget power switching.
2764 */
2765 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2766 const char *pin)
2767 {
2768 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2769
2770 if (!w) {
2771 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2772 return -EINVAL;
2773 }
2774
2775 dev_dbg(w->dapm->dev, "dapm: force enable pin %s\n", pin);
2776 w->connected = 1;
2777 w->force = 1;
2778 dapm_mark_dirty(w);
2779
2780 return 0;
2781 }
2782 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2783
2784 /**
2785 * snd_soc_dapm_disable_pin - disable pin.
2786 * @dapm: DAPM context
2787 * @pin: pin name
2788 *
2789 * Disables input/output pin and its parents or children widgets.
2790 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2791 * do any widget power switching.
2792 */
2793 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2794 const char *pin)
2795 {
2796 return snd_soc_dapm_set_pin(dapm, pin, 0);
2797 }
2798 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2799
2800 /**
2801 * snd_soc_dapm_nc_pin - permanently disable pin.
2802 * @dapm: DAPM context
2803 * @pin: pin name
2804 *
2805 * Marks the specified pin as being not connected, disabling it along
2806 * any parent or child widgets. At present this is identical to
2807 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2808 * additional things such as disabling controls which only affect
2809 * paths through the pin.
2810 *
2811 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2812 * do any widget power switching.
2813 */
2814 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2815 {
2816 return snd_soc_dapm_set_pin(dapm, pin, 0);
2817 }
2818 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2819
2820 /**
2821 * snd_soc_dapm_get_pin_status - get audio pin status
2822 * @dapm: DAPM context
2823 * @pin: audio signal pin endpoint (or start point)
2824 *
2825 * Get audio pin status - connected or disconnected.
2826 *
2827 * Returns 1 for connected otherwise 0.
2828 */
2829 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2830 const char *pin)
2831 {
2832 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2833
2834 if (w)
2835 return w->connected;
2836
2837 return 0;
2838 }
2839 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2840
2841 /**
2842 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2843 * @dapm: DAPM context
2844 * @pin: audio signal pin endpoint (or start point)
2845 *
2846 * Mark the given endpoint or pin as ignoring suspend. When the
2847 * system is disabled a path between two endpoints flagged as ignoring
2848 * suspend will not be disabled. The path must already be enabled via
2849 * normal means at suspend time, it will not be turned on if it was not
2850 * already enabled.
2851 */
2852 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2853 const char *pin)
2854 {
2855 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
2856
2857 if (!w) {
2858 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2859 return -EINVAL;
2860 }
2861
2862 w->ignore_suspend = 1;
2863
2864 return 0;
2865 }
2866 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2867
2868 /**
2869 * snd_soc_dapm_free - free dapm resources
2870 * @dapm: DAPM context
2871 *
2872 * Free all dapm widgets and resources.
2873 */
2874 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2875 {
2876 snd_soc_dapm_sys_remove(dapm->dev);
2877 dapm_debugfs_cleanup(dapm);
2878 dapm_free_widgets(dapm);
2879 list_del(&dapm->list);
2880 }
2881 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2882
2883 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2884 {
2885 struct snd_soc_dapm_widget *w;
2886 LIST_HEAD(down_list);
2887 int powerdown = 0;
2888
2889 list_for_each_entry(w, &dapm->card->widgets, list) {
2890 if (w->dapm != dapm)
2891 continue;
2892 if (w->power) {
2893 dapm_seq_insert(w, &down_list, false);
2894 w->power = 0;
2895 powerdown = 1;
2896 }
2897 }
2898
2899 /* If there were no widgets to power down we're already in
2900 * standby.
2901 */
2902 if (powerdown) {
2903 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
2904 dapm_seq_run(dapm, &down_list, 0, false);
2905 snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
2906 }
2907 }
2908
2909 /*
2910 * snd_soc_dapm_shutdown - callback for system shutdown
2911 */
2912 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2913 {
2914 struct snd_soc_codec *codec;
2915
2916 list_for_each_entry(codec, &card->codec_dev_list, list) {
2917 soc_dapm_shutdown_codec(&codec->dapm);
2918 snd_soc_dapm_set_bias_level(&codec->dapm, SND_SOC_BIAS_OFF);
2919 }
2920 }
2921
2922 /* Module information */
2923 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2924 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2925 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree