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