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regulator: Fix warning with CONFIG_BUG disabled
[zen-stable.git] / sound / soc / soc-dapm.c
blob25e54230cc6a53a831ebc8083236dd53b194a657
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/delay.h>
36 #include <linux/pm.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <linux/debugfs.h>
41 #include <linux/slab.h>
42 #include <sound/core.h>
43 #include <sound/pcm.h>
44 #include <sound/pcm_params.h>
45 #include <sound/soc.h>
46 #include <sound/initval.h>
47
48 #include <trace/events/asoc.h>
49
50 /* dapm power sequences - make this per codec in the future */
51 static int dapm_up_seq[] = {
52 [snd_soc_dapm_pre] = 0,
53 [snd_soc_dapm_supply] = 1,
54 [snd_soc_dapm_micbias] = 2,
55 [snd_soc_dapm_aif_in] = 3,
56 [snd_soc_dapm_aif_out] = 3,
57 [snd_soc_dapm_mic] = 4,
58 [snd_soc_dapm_mux] = 5,
59 [snd_soc_dapm_virt_mux] = 5,
60 [snd_soc_dapm_value_mux] = 5,
61 [snd_soc_dapm_dac] = 6,
62 [snd_soc_dapm_mixer] = 7,
63 [snd_soc_dapm_mixer_named_ctl] = 7,
64 [snd_soc_dapm_pga] = 8,
65 [snd_soc_dapm_adc] = 9,
66 [snd_soc_dapm_out_drv] = 10,
67 [snd_soc_dapm_hp] = 10,
68 [snd_soc_dapm_spk] = 10,
69 [snd_soc_dapm_post] = 11,
70 };
71
72 static int dapm_down_seq[] = {
73 [snd_soc_dapm_pre] = 0,
74 [snd_soc_dapm_adc] = 1,
75 [snd_soc_dapm_hp] = 2,
76 [snd_soc_dapm_spk] = 2,
77 [snd_soc_dapm_out_drv] = 2,
78 [snd_soc_dapm_pga] = 4,
79 [snd_soc_dapm_mixer_named_ctl] = 5,
80 [snd_soc_dapm_mixer] = 5,
81 [snd_soc_dapm_dac] = 6,
82 [snd_soc_dapm_mic] = 7,
83 [snd_soc_dapm_micbias] = 8,
84 [snd_soc_dapm_mux] = 9,
85 [snd_soc_dapm_virt_mux] = 9,
86 [snd_soc_dapm_value_mux] = 9,
87 [snd_soc_dapm_aif_in] = 10,
88 [snd_soc_dapm_aif_out] = 10,
89 [snd_soc_dapm_supply] = 11,
90 [snd_soc_dapm_post] = 12,
91 };
92
93 static void pop_wait(u32 pop_time)
94 {
95 if (pop_time)
96 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
97 }
98
99 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
100 {
101 va_list args;
102 char *buf;
103
104 if (!pop_time)
105 return;
106
107 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
108 if (buf == NULL)
109 return;
110
111 va_start(args, fmt);
112 vsnprintf(buf, PAGE_SIZE, fmt, args);
113 dev_info(dev, "%s", buf);
114 va_end(args);
115
116 kfree(buf);
117 }
118
119 /* create a new dapm widget */
120 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
121 const struct snd_soc_dapm_widget *_widget)
122 {
123 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
124 }
125
126 /**
127 * snd_soc_dapm_set_bias_level - set the bias level for the system
128 * @card: audio device
129 * @level: level to configure
130 *
131 * Configure the bias (power) levels for the SoC audio device.
132 *
133 * Returns 0 for success else error.
134 */
135 static int snd_soc_dapm_set_bias_level(struct snd_soc_card *card,
136 struct snd_soc_dapm_context *dapm,
137 enum snd_soc_bias_level level)
138 {
139 int ret = 0;
140
141 switch (level) {
142 case SND_SOC_BIAS_ON:
143 dev_dbg(dapm->dev, "Setting full bias\n");
144 break;
145 case SND_SOC_BIAS_PREPARE:
146 dev_dbg(dapm->dev, "Setting bias prepare\n");
147 break;
148 case SND_SOC_BIAS_STANDBY:
149 dev_dbg(dapm->dev, "Setting standby bias\n");
150 break;
151 case SND_SOC_BIAS_OFF:
152 dev_dbg(dapm->dev, "Setting bias off\n");
153 break;
154 default:
155 dev_err(dapm->dev, "Setting invalid bias %d\n", level);
156 return -EINVAL;
157 }
158
159 trace_snd_soc_bias_level_start(card, level);
160
161 if (card && card->set_bias_level)
162 ret = card->set_bias_level(card, level);
163 if (ret == 0) {
164 if (dapm->codec && dapm->codec->driver->set_bias_level)
165 ret = dapm->codec->driver->set_bias_level(dapm->codec, level);
166 else
167 dapm->bias_level = level;
168 }
169 if (ret == 0) {
170 if (card && card->set_bias_level_post)
171 ret = card->set_bias_level_post(card, level);
172 }
173
174 trace_snd_soc_bias_level_done(card, level);
175
176 return ret;
177 }
178
179 /* set up initial codec paths */
180 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
181 struct snd_soc_dapm_path *p, int i)
182 {
183 switch (w->id) {
184 case snd_soc_dapm_switch:
185 case snd_soc_dapm_mixer:
186 case snd_soc_dapm_mixer_named_ctl: {
187 int val;
188 struct soc_mixer_control *mc = (struct soc_mixer_control *)
189 w->kcontrols[i].private_value;
190 unsigned int reg = mc->reg;
191 unsigned int shift = mc->shift;
192 int max = mc->max;
193 unsigned int mask = (1 << fls(max)) - 1;
194 unsigned int invert = mc->invert;
195
196 val = snd_soc_read(w->codec, reg);
197 val = (val >> shift) & mask;
198
199 if ((invert && !val) || (!invert && val))
200 p->connect = 1;
201 else
202 p->connect = 0;
203 }
204 break;
205 case snd_soc_dapm_mux: {
206 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
207 int val, item, bitmask;
208
209 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
210 ;
211 val = snd_soc_read(w->codec, e->reg);
212 item = (val >> e->shift_l) & (bitmask - 1);
213
214 p->connect = 0;
215 for (i = 0; i < e->max; i++) {
216 if (!(strcmp(p->name, e->texts[i])) && item == i)
217 p->connect = 1;
218 }
219 }
220 break;
221 case snd_soc_dapm_virt_mux: {
222 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
223
224 p->connect = 0;
225 /* since a virtual mux has no backing registers to
226 * decide which path to connect, it will try to match
227 * with the first enumeration. This is to ensure
228 * that the default mux choice (the first) will be
229 * correctly powered up during initialization.
230 */
231 if (!strcmp(p->name, e->texts[0]))
232 p->connect = 1;
233 }
234 break;
235 case snd_soc_dapm_value_mux: {
236 struct soc_enum *e = (struct soc_enum *)
237 w->kcontrols[i].private_value;
238 int val, item;
239
240 val = snd_soc_read(w->codec, e->reg);
241 val = (val >> e->shift_l) & e->mask;
242 for (item = 0; item < e->max; item++) {
243 if (val == e->values[item])
244 break;
245 }
246
247 p->connect = 0;
248 for (i = 0; i < e->max; i++) {
249 if (!(strcmp(p->name, e->texts[i])) && item == i)
250 p->connect = 1;
251 }
252 }
253 break;
254 /* does not effect routing - always connected */
255 case snd_soc_dapm_pga:
256 case snd_soc_dapm_out_drv:
257 case snd_soc_dapm_output:
258 case snd_soc_dapm_adc:
259 case snd_soc_dapm_input:
260 case snd_soc_dapm_dac:
261 case snd_soc_dapm_micbias:
262 case snd_soc_dapm_vmid:
263 case snd_soc_dapm_supply:
264 case snd_soc_dapm_aif_in:
265 case snd_soc_dapm_aif_out:
266 p->connect = 1;
267 break;
268 /* does effect routing - dynamically connected */
269 case snd_soc_dapm_hp:
270 case snd_soc_dapm_mic:
271 case snd_soc_dapm_spk:
272 case snd_soc_dapm_line:
273 case snd_soc_dapm_pre:
274 case snd_soc_dapm_post:
275 p->connect = 0;
276 break;
277 }
278 }
279
280 /* connect mux widget to its interconnecting audio paths */
281 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
282 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
283 struct snd_soc_dapm_path *path, const char *control_name,
284 const struct snd_kcontrol_new *kcontrol)
285 {
286 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
287 int i;
288
289 for (i = 0; i < e->max; i++) {
290 if (!(strcmp(control_name, e->texts[i]))) {
291 list_add(&path->list, &dapm->card->paths);
292 list_add(&path->list_sink, &dest->sources);
293 list_add(&path->list_source, &src->sinks);
294 path->name = (char*)e->texts[i];
295 dapm_set_path_status(dest, path, 0);
296 return 0;
297 }
298 }
299
300 return -ENODEV;
301 }
302
303 /* connect mixer widget to its interconnecting audio paths */
304 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
305 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
306 struct snd_soc_dapm_path *path, const char *control_name)
307 {
308 int i;
309
310 /* search for mixer kcontrol */
311 for (i = 0; i < dest->num_kcontrols; i++) {
312 if (!strcmp(control_name, dest->kcontrols[i].name)) {
313 list_add(&path->list, &dapm->card->paths);
314 list_add(&path->list_sink, &dest->sources);
315 list_add(&path->list_source, &src->sinks);
316 path->name = dest->kcontrols[i].name;
317 dapm_set_path_status(dest, path, i);
318 return 0;
319 }
320 }
321 return -ENODEV;
322 }
323
324 /* update dapm codec register bits */
325 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
326 {
327 int change, power;
328 unsigned int old, new;
329 struct snd_soc_codec *codec = widget->codec;
330 struct snd_soc_dapm_context *dapm = widget->dapm;
331 struct snd_soc_card *card = dapm->card;
332
333 /* check for valid widgets */
334 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
335 widget->id == snd_soc_dapm_output ||
336 widget->id == snd_soc_dapm_hp ||
337 widget->id == snd_soc_dapm_mic ||
338 widget->id == snd_soc_dapm_line ||
339 widget->id == snd_soc_dapm_spk)
340 return 0;
341
342 power = widget->power;
343 if (widget->invert)
344 power = (power ? 0:1);
345
346 old = snd_soc_read(codec, widget->reg);
347 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
348
349 change = old != new;
350 if (change) {
351 pop_dbg(dapm->dev, card->pop_time,
352 "pop test %s : %s in %d ms\n",
353 widget->name, widget->power ? "on" : "off",
354 card->pop_time);
355 pop_wait(card->pop_time);
356 snd_soc_write(codec, widget->reg, new);
357 }
358 dev_dbg(dapm->dev, "reg %x old %x new %x change %d\n", widget->reg,
359 old, new, change);
360 return change;
361 }
362
363 /* create new dapm mixer control */
364 static int dapm_new_mixer(struct snd_soc_dapm_context *dapm,
365 struct snd_soc_dapm_widget *w)
366 {
367 int i, ret = 0;
368 size_t name_len;
369 struct snd_soc_dapm_path *path;
370 struct snd_card *card = dapm->codec->card->snd_card;
371
372 /* add kcontrol */
373 for (i = 0; i < w->num_kcontrols; i++) {
374
375 /* match name */
376 list_for_each_entry(path, &w->sources, list_sink) {
377
378 /* mixer/mux paths name must match control name */
379 if (path->name != (char*)w->kcontrols[i].name)
380 continue;
381
382 /* add dapm control with long name.
383 * for dapm_mixer this is the concatenation of the
384 * mixer and kcontrol name.
385 * for dapm_mixer_named_ctl this is simply the
386 * kcontrol name.
387 */
388 name_len = strlen(w->kcontrols[i].name) + 1;
389 if (w->id != snd_soc_dapm_mixer_named_ctl)
390 name_len += 1 + strlen(w->name);
391
392 path->long_name = kmalloc(name_len, GFP_KERNEL);
393
394 if (path->long_name == NULL)
395 return -ENOMEM;
396
397 switch (w->id) {
398 default:
399 snprintf(path->long_name, name_len, "%s %s",
400 w->name, w->kcontrols[i].name);
401 break;
402 case snd_soc_dapm_mixer_named_ctl:
403 snprintf(path->long_name, name_len, "%s",
404 w->kcontrols[i].name);
405 break;
406 }
407
408 path->long_name[name_len - 1] = '\0';
409
410 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
411 path->long_name);
412 ret = snd_ctl_add(card, path->kcontrol);
413 if (ret < 0) {
414 dev_err(dapm->dev,
415 "asoc: failed to add dapm kcontrol %s: %d\n",
416 path->long_name, ret);
417 kfree(path->long_name);
418 path->long_name = NULL;
419 return ret;
420 }
421 }
422 }
423 return ret;
424 }
425
426 /* create new dapm mux control */
427 static int dapm_new_mux(struct snd_soc_dapm_context *dapm,
428 struct snd_soc_dapm_widget *w)
429 {
430 struct snd_soc_dapm_path *path = NULL;
431 struct snd_kcontrol *kcontrol;
432 struct snd_card *card = dapm->codec->card->snd_card;
433 int ret = 0;
434
435 if (!w->num_kcontrols) {
436 dev_err(dapm->dev, "asoc: mux %s has no controls\n", w->name);
437 return -EINVAL;
438 }
439
440 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
441 ret = snd_ctl_add(card, kcontrol);
442
443 if (ret < 0)
444 goto err;
445
446 list_for_each_entry(path, &w->sources, list_sink)
447 path->kcontrol = kcontrol;
448
449 return ret;
450
451 err:
452 dev_err(dapm->dev, "asoc: failed to add kcontrol %s\n", w->name);
453 return ret;
454 }
455
456 /* create new dapm volume control */
457 static int dapm_new_pga(struct snd_soc_dapm_context *dapm,
458 struct snd_soc_dapm_widget *w)
459 {
460 if (w->num_kcontrols)
461 dev_err(w->dapm->dev,
462 "asoc: PGA controls not supported: '%s'\n", w->name);
463
464 return 0;
465 }
466
467 /* reset 'walked' bit for each dapm path */
468 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
469 {
470 struct snd_soc_dapm_path *p;
471
472 list_for_each_entry(p, &dapm->card->paths, list)
473 p->walked = 0;
474 }
475
476 /* We implement power down on suspend by checking the power state of
477 * the ALSA card - when we are suspending the ALSA state for the card
478 * is set to D3.
479 */
480 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
481 {
482 int level = snd_power_get_state(widget->dapm->codec->card->snd_card);
483
484 switch (level) {
485 case SNDRV_CTL_POWER_D3hot:
486 case SNDRV_CTL_POWER_D3cold:
487 if (widget->ignore_suspend)
488 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
489 widget->name);
490 return widget->ignore_suspend;
491 default:
492 return 1;
493 }
494 }
495
496 /*
497 * Recursively check for a completed path to an active or physically connected
498 * output widget. Returns number of complete paths.
499 */
500 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
501 {
502 struct snd_soc_dapm_path *path;
503 int con = 0;
504
505 if (widget->id == snd_soc_dapm_supply)
506 return 0;
507
508 switch (widget->id) {
509 case snd_soc_dapm_adc:
510 case snd_soc_dapm_aif_out:
511 if (widget->active)
512 return snd_soc_dapm_suspend_check(widget);
513 default:
514 break;
515 }
516
517 if (widget->connected) {
518 /* connected pin ? */
519 if (widget->id == snd_soc_dapm_output && !widget->ext)
520 return snd_soc_dapm_suspend_check(widget);
521
522 /* connected jack or spk ? */
523 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
524 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
525 return snd_soc_dapm_suspend_check(widget);
526 }
527
528 list_for_each_entry(path, &widget->sinks, list_source) {
529 if (path->walked)
530 continue;
531
532 if (path->sink && path->connect) {
533 path->walked = 1;
534 con += is_connected_output_ep(path->sink);
535 }
536 }
537
538 return con;
539 }
540
541 /*
542 * Recursively check for a completed path to an active or physically connected
543 * input widget. Returns number of complete paths.
544 */
545 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
546 {
547 struct snd_soc_dapm_path *path;
548 int con = 0;
549
550 if (widget->id == snd_soc_dapm_supply)
551 return 0;
552
553 /* active stream ? */
554 switch (widget->id) {
555 case snd_soc_dapm_dac:
556 case snd_soc_dapm_aif_in:
557 if (widget->active)
558 return snd_soc_dapm_suspend_check(widget);
559 default:
560 break;
561 }
562
563 if (widget->connected) {
564 /* connected pin ? */
565 if (widget->id == snd_soc_dapm_input && !widget->ext)
566 return snd_soc_dapm_suspend_check(widget);
567
568 /* connected VMID/Bias for lower pops */
569 if (widget->id == snd_soc_dapm_vmid)
570 return snd_soc_dapm_suspend_check(widget);
571
572 /* connected jack ? */
573 if (widget->id == snd_soc_dapm_mic ||
574 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
575 return snd_soc_dapm_suspend_check(widget);
576 }
577
578 list_for_each_entry(path, &widget->sources, list_sink) {
579 if (path->walked)
580 continue;
581
582 if (path->source && path->connect) {
583 path->walked = 1;
584 con += is_connected_input_ep(path->source);
585 }
586 }
587
588 return con;
589 }
590
591 /*
592 * Handler for generic register modifier widget.
593 */
594 int dapm_reg_event(struct snd_soc_dapm_widget *w,
595 struct snd_kcontrol *kcontrol, int event)
596 {
597 unsigned int val;
598
599 if (SND_SOC_DAPM_EVENT_ON(event))
600 val = w->on_val;
601 else
602 val = w->off_val;
603
604 snd_soc_update_bits(w->codec, -(w->reg + 1),
605 w->mask << w->shift, val << w->shift);
606
607 return 0;
608 }
609 EXPORT_SYMBOL_GPL(dapm_reg_event);
610
611 /* Standard power change method, used to apply power changes to most
612 * widgets.
613 */
614 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
615 {
616 int ret;
617
618 /* call any power change event handlers */
619 if (w->event)
620 dev_dbg(w->dapm->dev, "power %s event for %s flags %x\n",
621 w->power ? "on" : "off",
622 w->name, w->event_flags);
623
624 /* power up pre event */
625 if (w->power && w->event &&
626 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
627 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
628 if (ret < 0)
629 return ret;
630 }
631
632 /* power down pre event */
633 if (!w->power && w->event &&
634 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
635 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
636 if (ret < 0)
637 return ret;
638 }
639
640 dapm_update_bits(w);
641
642 /* power up post event */
643 if (w->power && w->event &&
644 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
645 ret = w->event(w,
646 NULL, SND_SOC_DAPM_POST_PMU);
647 if (ret < 0)
648 return ret;
649 }
650
651 /* power down post event */
652 if (!w->power && w->event &&
653 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
654 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
655 if (ret < 0)
656 return ret;
657 }
658
659 return 0;
660 }
661
662 /* Generic check to see if a widget should be powered.
663 */
664 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
665 {
666 int in, out;
667
668 in = is_connected_input_ep(w);
669 dapm_clear_walk(w->dapm);
670 out = is_connected_output_ep(w);
671 dapm_clear_walk(w->dapm);
672 return out != 0 && in != 0;
673 }
674
675 /* Check to see if an ADC has power */
676 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
677 {
678 int in;
679
680 if (w->active) {
681 in = is_connected_input_ep(w);
682 dapm_clear_walk(w->dapm);
683 return in != 0;
684 } else {
685 return dapm_generic_check_power(w);
686 }
687 }
688
689 /* Check to see if a DAC has power */
690 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
691 {
692 int out;
693
694 if (w->active) {
695 out = is_connected_output_ep(w);
696 dapm_clear_walk(w->dapm);
697 return out != 0;
698 } else {
699 return dapm_generic_check_power(w);
700 }
701 }
702
703 /* Check to see if a power supply is needed */
704 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
705 {
706 struct snd_soc_dapm_path *path;
707 int power = 0;
708
709 /* Check if one of our outputs is connected */
710 list_for_each_entry(path, &w->sinks, list_source) {
711 if (path->connected &&
712 !path->connected(path->source, path->sink))
713 continue;
714
715 if (!path->sink)
716 continue;
717
718 if (path->sink->force) {
719 power = 1;
720 break;
721 }
722
723 if (path->sink->power_check &&
724 path->sink->power_check(path->sink)) {
725 power = 1;
726 break;
727 }
728 }
729
730 dapm_clear_walk(w->dapm);
731
732 return power;
733 }
734
735 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
736 struct snd_soc_dapm_widget *b,
737 int sort[])
738 {
739 if (sort[a->id] != sort[b->id])
740 return sort[a->id] - sort[b->id];
741 if (a->reg != b->reg)
742 return a->reg - b->reg;
743 if (a->dapm != b->dapm)
744 return (unsigned long)a->dapm - (unsigned long)b->dapm;
745
746 return 0;
747 }
748
749 /* Insert a widget in order into a DAPM power sequence. */
750 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
751 struct list_head *list,
752 int sort[])
753 {
754 struct snd_soc_dapm_widget *w;
755
756 list_for_each_entry(w, list, power_list)
757 if (dapm_seq_compare(new_widget, w, sort) < 0) {
758 list_add_tail(&new_widget->power_list, &w->power_list);
759 return;
760 }
761
762 list_add_tail(&new_widget->power_list, list);
763 }
764
765 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
766 struct snd_soc_dapm_widget *w, int event)
767 {
768 struct snd_soc_card *card = dapm->card;
769 const char *ev_name;
770 int power, ret;
771
772 switch (event) {
773 case SND_SOC_DAPM_PRE_PMU:
774 ev_name = "PRE_PMU";
775 power = 1;
776 break;
777 case SND_SOC_DAPM_POST_PMU:
778 ev_name = "POST_PMU";
779 power = 1;
780 break;
781 case SND_SOC_DAPM_PRE_PMD:
782 ev_name = "PRE_PMD";
783 power = 0;
784 break;
785 case SND_SOC_DAPM_POST_PMD:
786 ev_name = "POST_PMD";
787 power = 0;
788 break;
789 default:
790 BUG();
791 return;
792 }
793
794 if (w->power != power)
795 return;
796
797 if (w->event && (w->event_flags & event)) {
798 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
799 w->name, ev_name);
800 trace_snd_soc_dapm_widget_event_start(w, event);
801 ret = w->event(w, NULL, event);
802 trace_snd_soc_dapm_widget_event_done(w, event);
803 if (ret < 0)
804 pr_err("%s: %s event failed: %d\n",
805 ev_name, w->name, ret);
806 }
807 }
808
809 /* Apply the coalesced changes from a DAPM sequence */
810 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
811 struct list_head *pending)
812 {
813 struct snd_soc_card *card = dapm->card;
814 struct snd_soc_dapm_widget *w;
815 int reg, power;
816 unsigned int value = 0;
817 unsigned int mask = 0;
818 unsigned int cur_mask;
819
820 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
821 power_list)->reg;
822
823 list_for_each_entry(w, pending, power_list) {
824 cur_mask = 1 << w->shift;
825 BUG_ON(reg != w->reg);
826
827 if (w->invert)
828 power = !w->power;
829 else
830 power = w->power;
831
832 mask |= cur_mask;
833 if (power)
834 value |= cur_mask;
835
836 pop_dbg(dapm->dev, card->pop_time,
837 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
838 w->name, reg, value, mask);
839
840 /* Check for events */
841 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
842 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
843 }
844
845 if (reg >= 0) {
846 pop_dbg(dapm->dev, card->pop_time,
847 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
848 value, mask, reg, card->pop_time);
849 pop_wait(card->pop_time);
850 snd_soc_update_bits(dapm->codec, reg, mask, value);
851 }
852
853 list_for_each_entry(w, pending, power_list) {
854 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
855 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
856 }
857 }
858
859 /* Apply a DAPM power sequence.
860 *
861 * We walk over a pre-sorted list of widgets to apply power to. In
862 * order to minimise the number of writes to the device required
863 * multiple widgets will be updated in a single write where possible.
864 * Currently anything that requires more than a single write is not
865 * handled.
866 */
867 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
868 struct list_head *list, int event, int sort[])
869 {
870 struct snd_soc_dapm_widget *w, *n;
871 LIST_HEAD(pending);
872 int cur_sort = -1;
873 int cur_reg = SND_SOC_NOPM;
874 struct snd_soc_dapm_context *cur_dapm = NULL;
875 int ret;
876
877 list_for_each_entry_safe(w, n, list, power_list) {
878 ret = 0;
879
880 /* Do we need to apply any queued changes? */
881 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
882 w->dapm != cur_dapm) {
883 if (!list_empty(&pending))
884 dapm_seq_run_coalesced(cur_dapm, &pending);
885
886 INIT_LIST_HEAD(&pending);
887 cur_sort = -1;
888 cur_reg = SND_SOC_NOPM;
889 cur_dapm = NULL;
890 }
891
892 switch (w->id) {
893 case snd_soc_dapm_pre:
894 if (!w->event)
895 list_for_each_entry_safe_continue(w, n, list,
896 power_list);
897
898 if (event == SND_SOC_DAPM_STREAM_START)
899 ret = w->event(w,
900 NULL, SND_SOC_DAPM_PRE_PMU);
901 else if (event == SND_SOC_DAPM_STREAM_STOP)
902 ret = w->event(w,
903 NULL, SND_SOC_DAPM_PRE_PMD);
904 break;
905
906 case snd_soc_dapm_post:
907 if (!w->event)
908 list_for_each_entry_safe_continue(w, n, list,
909 power_list);
910
911 if (event == SND_SOC_DAPM_STREAM_START)
912 ret = w->event(w,
913 NULL, SND_SOC_DAPM_POST_PMU);
914 else if (event == SND_SOC_DAPM_STREAM_STOP)
915 ret = w->event(w,
916 NULL, SND_SOC_DAPM_POST_PMD);
917 break;
918
919 case snd_soc_dapm_input:
920 case snd_soc_dapm_output:
921 case snd_soc_dapm_hp:
922 case snd_soc_dapm_mic:
923 case snd_soc_dapm_line:
924 case snd_soc_dapm_spk:
925 /* No register support currently */
926 ret = dapm_generic_apply_power(w);
927 break;
928
929 default:
930 /* Queue it up for application */
931 cur_sort = sort[w->id];
932 cur_reg = w->reg;
933 cur_dapm = w->dapm;
934 list_move(&w->power_list, &pending);
935 break;
936 }
937
938 if (ret < 0)
939 dev_err(w->dapm->dev,
940 "Failed to apply widget power: %d\n", ret);
941 }
942
943 if (!list_empty(&pending))
944 dapm_seq_run_coalesced(dapm, &pending);
945 }
946
947 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
948 {
949 struct snd_soc_dapm_update *update = dapm->update;
950 struct snd_soc_dapm_widget *w;
951 int ret;
952
953 if (!update)
954 return;
955
956 w = update->widget;
957
958 if (w->event &&
959 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
960 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
961 if (ret != 0)
962 pr_err("%s DAPM pre-event failed: %d\n",
963 w->name, ret);
964 }
965
966 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
967 update->val);
968 if (ret < 0)
969 pr_err("%s DAPM update failed: %d\n", w->name, ret);
970
971 if (w->event &&
972 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
973 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
974 if (ret != 0)
975 pr_err("%s DAPM post-event failed: %d\n",
976 w->name, ret);
977 }
978 }
979
980
981
982 /*
983 * Scan each dapm widget for complete audio path.
984 * A complete path is a route that has valid endpoints i.e.:-
985 *
986 * o DAC to output pin.
987 * o Input Pin to ADC.
988 * o Input pin to Output pin (bypass, sidetone)
989 * o DAC to ADC (loopback).
990 */
991 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
992 {
993 struct snd_soc_card *card = dapm->codec->card;
994 struct snd_soc_dapm_widget *w;
995 struct snd_soc_dapm_context *d;
996 LIST_HEAD(up_list);
997 LIST_HEAD(down_list);
998 int ret = 0;
999 int power;
1000
1001 trace_snd_soc_dapm_start(card);
1002
1003 list_for_each_entry(d, &card->dapm_list, list)
1004 if (d->n_widgets)
1005 d->dev_power = 0;
1006
1007 /* Check which widgets we need to power and store them in
1008 * lists indicating if they should be powered up or down.
1009 */
1010 list_for_each_entry(w, &card->widgets, list) {
1011 switch (w->id) {
1012 case snd_soc_dapm_pre:
1013 dapm_seq_insert(w, &down_list, dapm_down_seq);
1014 break;
1015 case snd_soc_dapm_post:
1016 dapm_seq_insert(w, &up_list, dapm_up_seq);
1017 break;
1018
1019 default:
1020 if (!w->power_check)
1021 continue;
1022
1023 if (!w->force)
1024 power = w->power_check(w);
1025 else
1026 power = 1;
1027 if (power)
1028 w->dapm->dev_power = 1;
1029
1030 if (w->power == power)
1031 continue;
1032
1033 trace_snd_soc_dapm_widget_power(w, power);
1034
1035 if (power)
1036 dapm_seq_insert(w, &up_list, dapm_up_seq);
1037 else
1038 dapm_seq_insert(w, &down_list, dapm_down_seq);
1039
1040 w->power = power;
1041 break;
1042 }
1043 }
1044
1045 /* If there are no DAPM widgets then try to figure out power from the
1046 * event type.
1047 */
1048 if (!dapm->n_widgets) {
1049 switch (event) {
1050 case SND_SOC_DAPM_STREAM_START:
1051 case SND_SOC_DAPM_STREAM_RESUME:
1052 dapm->dev_power = 1;
1053 break;
1054 case SND_SOC_DAPM_STREAM_STOP:
1055 dapm->dev_power = !!dapm->codec->active;
1056 break;
1057 case SND_SOC_DAPM_STREAM_SUSPEND:
1058 dapm->dev_power = 0;
1059 break;
1060 case SND_SOC_DAPM_STREAM_NOP:
1061 switch (dapm->bias_level) {
1062 case SND_SOC_BIAS_STANDBY:
1063 case SND_SOC_BIAS_OFF:
1064 dapm->dev_power = 0;
1065 break;
1066 default:
1067 dapm->dev_power = 1;
1068 break;
1069 }
1070 break;
1071 default:
1072 break;
1073 }
1074 }
1075
1076 list_for_each_entry(d, &dapm->card->dapm_list, list) {
1077 if (d->dev_power && d->bias_level == SND_SOC_BIAS_OFF) {
1078 ret = snd_soc_dapm_set_bias_level(card, d,
1079 SND_SOC_BIAS_STANDBY);
1080 if (ret != 0)
1081 dev_err(d->dev,
1082 "Failed to turn on bias: %d\n", ret);
1083 }
1084
1085 /* If we're changing to all on or all off then prepare */
1086 if ((d->dev_power && d->bias_level == SND_SOC_BIAS_STANDBY) ||
1087 (!d->dev_power && d->bias_level == SND_SOC_BIAS_ON)) {
1088 ret = snd_soc_dapm_set_bias_level(card, d,
1089 SND_SOC_BIAS_PREPARE);
1090 if (ret != 0)
1091 dev_err(d->dev,
1092 "Failed to prepare bias: %d\n", ret);
1093 }
1094 }
1095
1096 /* Power down widgets first; try to avoid amplifying pops. */
1097 dapm_seq_run(dapm, &down_list, event, dapm_down_seq);
1098
1099 dapm_widget_update(dapm);
1100
1101 /* Now power up. */
1102 dapm_seq_run(dapm, &up_list, event, dapm_up_seq);
1103
1104 list_for_each_entry(d, &dapm->card->dapm_list, list) {
1105 /* If we just powered the last thing off drop to standby bias */
1106 if (d->bias_level == SND_SOC_BIAS_PREPARE && !d->dev_power) {
1107 ret = snd_soc_dapm_set_bias_level(card, d,
1108 SND_SOC_BIAS_STANDBY);
1109 if (ret != 0)
1110 dev_err(d->dev,
1111 "Failed to apply standby bias: %d\n",
1112 ret);
1113 }
1114
1115 /* If we're in standby and can support bias off then do that */
1116 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1117 d->idle_bias_off) {
1118 ret = snd_soc_dapm_set_bias_level(card, d,
1119 SND_SOC_BIAS_OFF);
1120 if (ret != 0)
1121 dev_err(d->dev,
1122 "Failed to turn off bias: %d\n", ret);
1123 }
1124
1125 /* If we just powered up then move to active bias */
1126 if (d->bias_level == SND_SOC_BIAS_PREPARE && d->dev_power) {
1127 ret = snd_soc_dapm_set_bias_level(card, d,
1128 SND_SOC_BIAS_ON);
1129 if (ret != 0)
1130 dev_err(d->dev,
1131 "Failed to apply active bias: %d\n",
1132 ret);
1133 }
1134 }
1135
1136 pop_dbg(dapm->dev, card->pop_time,
1137 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1138 pop_wait(card->pop_time);
1139
1140 trace_snd_soc_dapm_done(card);
1141
1142 return 0;
1143 }
1144
1145 #ifdef CONFIG_DEBUG_FS
1146 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1147 {
1148 file->private_data = inode->i_private;
1149 return 0;
1150 }
1151
1152 static ssize_t dapm_widget_power_read_file(struct file *file,
1153 char __user *user_buf,
1154 size_t count, loff_t *ppos)
1155 {
1156 struct snd_soc_dapm_widget *w = file->private_data;
1157 char *buf;
1158 int in, out;
1159 ssize_t ret;
1160 struct snd_soc_dapm_path *p = NULL;
1161
1162 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1163 if (!buf)
1164 return -ENOMEM;
1165
1166 in = is_connected_input_ep(w);
1167 dapm_clear_walk(w->dapm);
1168 out = is_connected_output_ep(w);
1169 dapm_clear_walk(w->dapm);
1170
1171 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1172 w->name, w->power ? "On" : "Off", in, out);
1173
1174 if (w->reg >= 0)
1175 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1176 " - R%d(0x%x) bit %d",
1177 w->reg, w->reg, w->shift);
1178
1179 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1180
1181 if (w->sname)
1182 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1183 w->sname,
1184 w->active ? "active" : "inactive");
1185
1186 list_for_each_entry(p, &w->sources, list_sink) {
1187 if (p->connected && !p->connected(w, p->sink))
1188 continue;
1189
1190 if (p->connect)
1191 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1192 " in %s %s\n",
1193 p->name ? p->name : "static",
1194 p->source->name);
1195 }
1196 list_for_each_entry(p, &w->sinks, list_source) {
1197 if (p->connected && !p->connected(w, p->sink))
1198 continue;
1199
1200 if (p->connect)
1201 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1202 " out %s %s\n",
1203 p->name ? p->name : "static",
1204 p->sink->name);
1205 }
1206
1207 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1208
1209 kfree(buf);
1210 return ret;
1211 }
1212
1213 static const struct file_operations dapm_widget_power_fops = {
1214 .open = dapm_widget_power_open_file,
1215 .read = dapm_widget_power_read_file,
1216 .llseek = default_llseek,
1217 };
1218
1219 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm)
1220 {
1221 struct snd_soc_dapm_widget *w;
1222 struct dentry *d;
1223
1224 if (!dapm->debugfs_dapm)
1225 return;
1226
1227 list_for_each_entry(w, &dapm->card->widgets, list) {
1228 if (!w->name || w->dapm != dapm)
1229 continue;
1230
1231 d = debugfs_create_file(w->name, 0444,
1232 dapm->debugfs_dapm, w,
1233 &dapm_widget_power_fops);
1234 if (!d)
1235 dev_warn(w->dapm->dev,
1236 "ASoC: Failed to create %s debugfs file\n",
1237 w->name);
1238 }
1239 }
1240 #else
1241 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm)
1242 {
1243 }
1244 #endif
1245
1246 /* test and update the power status of a mux widget */
1247 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1248 struct snd_kcontrol *kcontrol, int change,
1249 int mux, struct soc_enum *e)
1250 {
1251 struct snd_soc_dapm_path *path;
1252 int found = 0;
1253
1254 if (widget->id != snd_soc_dapm_mux &&
1255 widget->id != snd_soc_dapm_virt_mux &&
1256 widget->id != snd_soc_dapm_value_mux)
1257 return -ENODEV;
1258
1259 if (!change)
1260 return 0;
1261
1262 /* find dapm widget path assoc with kcontrol */
1263 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1264 if (path->kcontrol != kcontrol)
1265 continue;
1266
1267 if (!path->name || !e->texts[mux])
1268 continue;
1269
1270 found = 1;
1271 /* we now need to match the string in the enum to the path */
1272 if (!(strcmp(path->name, e->texts[mux])))
1273 path->connect = 1; /* new connection */
1274 else
1275 path->connect = 0; /* old connection must be powered down */
1276 }
1277
1278 if (found)
1279 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1280
1281 return 0;
1282 }
1283
1284 /* test and update the power status of a mixer or switch widget */
1285 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1286 struct snd_kcontrol *kcontrol, int connect)
1287 {
1288 struct snd_soc_dapm_path *path;
1289 int found = 0;
1290
1291 if (widget->id != snd_soc_dapm_mixer &&
1292 widget->id != snd_soc_dapm_mixer_named_ctl &&
1293 widget->id != snd_soc_dapm_switch)
1294 return -ENODEV;
1295
1296 /* find dapm widget path assoc with kcontrol */
1297 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1298 if (path->kcontrol != kcontrol)
1299 continue;
1300
1301 /* found, now check type */
1302 found = 1;
1303 path->connect = connect;
1304 break;
1305 }
1306
1307 if (found)
1308 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1309
1310 return 0;
1311 }
1312
1313 /* show dapm widget status in sys fs */
1314 static ssize_t dapm_widget_show(struct device *dev,
1315 struct device_attribute *attr, char *buf)
1316 {
1317 struct snd_soc_pcm_runtime *rtd =
1318 container_of(dev, struct snd_soc_pcm_runtime, dev);
1319 struct snd_soc_codec *codec =rtd->codec;
1320 struct snd_soc_dapm_widget *w;
1321 int count = 0;
1322 char *state = "not set";
1323
1324 list_for_each_entry(w, &codec->card->widgets, list) {
1325 if (w->dapm != &codec->dapm)
1326 continue;
1327
1328 /* only display widgets that burnm power */
1329 switch (w->id) {
1330 case snd_soc_dapm_hp:
1331 case snd_soc_dapm_mic:
1332 case snd_soc_dapm_spk:
1333 case snd_soc_dapm_line:
1334 case snd_soc_dapm_micbias:
1335 case snd_soc_dapm_dac:
1336 case snd_soc_dapm_adc:
1337 case snd_soc_dapm_pga:
1338 case snd_soc_dapm_out_drv:
1339 case snd_soc_dapm_mixer:
1340 case snd_soc_dapm_mixer_named_ctl:
1341 case snd_soc_dapm_supply:
1342 if (w->name)
1343 count += sprintf(buf + count, "%s: %s\n",
1344 w->name, w->power ? "On":"Off");
1345 break;
1346 default:
1347 break;
1348 }
1349 }
1350
1351 switch (codec->dapm.bias_level) {
1352 case SND_SOC_BIAS_ON:
1353 state = "On";
1354 break;
1355 case SND_SOC_BIAS_PREPARE:
1356 state = "Prepare";
1357 break;
1358 case SND_SOC_BIAS_STANDBY:
1359 state = "Standby";
1360 break;
1361 case SND_SOC_BIAS_OFF:
1362 state = "Off";
1363 break;
1364 }
1365 count += sprintf(buf + count, "PM State: %s\n", state);
1366
1367 return count;
1368 }
1369
1370 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1371
1372 int snd_soc_dapm_sys_add(struct device *dev)
1373 {
1374 return device_create_file(dev, &dev_attr_dapm_widget);
1375 }
1376
1377 static void snd_soc_dapm_sys_remove(struct device *dev)
1378 {
1379 device_remove_file(dev, &dev_attr_dapm_widget);
1380 }
1381
1382 /* free all dapm widgets and resources */
1383 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1384 {
1385 struct snd_soc_dapm_widget *w, *next_w;
1386 struct snd_soc_dapm_path *p, *next_p;
1387
1388 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1389 if (w->dapm != dapm)
1390 continue;
1391 list_del(&w->list);
1392 /*
1393 * remove source and sink paths associated to this widget.
1394 * While removing the path, remove reference to it from both
1395 * source and sink widgets so that path is removed only once.
1396 */
1397 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1398 list_del(&p->list_sink);
1399 list_del(&p->list_source);
1400 list_del(&p->list);
1401 kfree(p->long_name);
1402 kfree(p);
1403 }
1404 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1405 list_del(&p->list_sink);
1406 list_del(&p->list_source);
1407 list_del(&p->list);
1408 kfree(p->long_name);
1409 kfree(p);
1410 }
1411 kfree(w->name);
1412 kfree(w);
1413 }
1414 }
1415
1416 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1417 const char *pin, int status)
1418 {
1419 struct snd_soc_dapm_widget *w;
1420
1421 list_for_each_entry(w, &dapm->card->widgets, list) {
1422 if (w->dapm != dapm)
1423 continue;
1424 if (!strcmp(w->name, pin)) {
1425 dev_dbg(w->dapm->dev, "dapm: pin %s = %d\n",
1426 pin, status);
1427 w->connected = status;
1428 /* Allow disabling of forced pins */
1429 if (status == 0)
1430 w->force = 0;
1431 return 0;
1432 }
1433 }
1434
1435 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1436 return -EINVAL;
1437 }
1438
1439 /**
1440 * snd_soc_dapm_sync - scan and power dapm paths
1441 * @dapm: DAPM context
1442 *
1443 * Walks all dapm audio paths and powers widgets according to their
1444 * stream or path usage.
1445 *
1446 * Returns 0 for success.
1447 */
1448 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1449 {
1450 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1451 }
1452 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1453
1454 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1455 const struct snd_soc_dapm_route *route)
1456 {
1457 struct snd_soc_dapm_path *path;
1458 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1459 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1460 const char *sink;
1461 const char *control = route->control;
1462 const char *source;
1463 char prefixed_sink[80];
1464 char prefixed_source[80];
1465 int ret = 0;
1466
1467 if (dapm->codec->name_prefix) {
1468 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1469 dapm->codec->name_prefix, route->sink);
1470 sink = prefixed_sink;
1471 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1472 dapm->codec->name_prefix, route->source);
1473 source = prefixed_source;
1474 } else {
1475 sink = route->sink;
1476 source = route->source;
1477 }
1478
1479 /*
1480 * find src and dest widgets over all widgets but favor a widget from
1481 * current DAPM context
1482 */
1483 list_for_each_entry(w, &dapm->card->widgets, list) {
1484 if (!wsink && !(strcmp(w->name, sink))) {
1485 wtsink = w;
1486 if (w->dapm == dapm)
1487 wsink = w;
1488 continue;
1489 }
1490 if (!wsource && !(strcmp(w->name, source))) {
1491 wtsource = w;
1492 if (w->dapm == dapm)
1493 wsource = w;
1494 }
1495 }
1496 /* use widget from another DAPM context if not found from this */
1497 if (!wsink)
1498 wsink = wtsink;
1499 if (!wsource)
1500 wsource = wtsource;
1501
1502 if (wsource == NULL || wsink == NULL)
1503 return -ENODEV;
1504
1505 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1506 if (!path)
1507 return -ENOMEM;
1508
1509 path->source = wsource;
1510 path->sink = wsink;
1511 path->connected = route->connected;
1512 INIT_LIST_HEAD(&path->list);
1513 INIT_LIST_HEAD(&path->list_source);
1514 INIT_LIST_HEAD(&path->list_sink);
1515
1516 /* check for external widgets */
1517 if (wsink->id == snd_soc_dapm_input) {
1518 if (wsource->id == snd_soc_dapm_micbias ||
1519 wsource->id == snd_soc_dapm_mic ||
1520 wsource->id == snd_soc_dapm_line ||
1521 wsource->id == snd_soc_dapm_output)
1522 wsink->ext = 1;
1523 }
1524 if (wsource->id == snd_soc_dapm_output) {
1525 if (wsink->id == snd_soc_dapm_spk ||
1526 wsink->id == snd_soc_dapm_hp ||
1527 wsink->id == snd_soc_dapm_line ||
1528 wsink->id == snd_soc_dapm_input)
1529 wsource->ext = 1;
1530 }
1531
1532 /* connect static paths */
1533 if (control == NULL) {
1534 list_add(&path->list, &dapm->card->paths);
1535 list_add(&path->list_sink, &wsink->sources);
1536 list_add(&path->list_source, &wsource->sinks);
1537 path->connect = 1;
1538 return 0;
1539 }
1540
1541 /* connect dynamic paths */
1542 switch(wsink->id) {
1543 case snd_soc_dapm_adc:
1544 case snd_soc_dapm_dac:
1545 case snd_soc_dapm_pga:
1546 case snd_soc_dapm_out_drv:
1547 case snd_soc_dapm_input:
1548 case snd_soc_dapm_output:
1549 case snd_soc_dapm_micbias:
1550 case snd_soc_dapm_vmid:
1551 case snd_soc_dapm_pre:
1552 case snd_soc_dapm_post:
1553 case snd_soc_dapm_supply:
1554 case snd_soc_dapm_aif_in:
1555 case snd_soc_dapm_aif_out:
1556 list_add(&path->list, &dapm->card->paths);
1557 list_add(&path->list_sink, &wsink->sources);
1558 list_add(&path->list_source, &wsource->sinks);
1559 path->connect = 1;
1560 return 0;
1561 case snd_soc_dapm_mux:
1562 case snd_soc_dapm_virt_mux:
1563 case snd_soc_dapm_value_mux:
1564 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1565 &wsink->kcontrols[0]);
1566 if (ret != 0)
1567 goto err;
1568 break;
1569 case snd_soc_dapm_switch:
1570 case snd_soc_dapm_mixer:
1571 case snd_soc_dapm_mixer_named_ctl:
1572 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1573 if (ret != 0)
1574 goto err;
1575 break;
1576 case snd_soc_dapm_hp:
1577 case snd_soc_dapm_mic:
1578 case snd_soc_dapm_line:
1579 case snd_soc_dapm_spk:
1580 list_add(&path->list, &dapm->card->paths);
1581 list_add(&path->list_sink, &wsink->sources);
1582 list_add(&path->list_source, &wsource->sinks);
1583 path->connect = 0;
1584 return 0;
1585 }
1586 return 0;
1587
1588 err:
1589 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1590 source, control, sink);
1591 kfree(path);
1592 return ret;
1593 }
1594
1595 /**
1596 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1597 * @dapm: DAPM context
1598 * @route: audio routes
1599 * @num: number of routes
1600 *
1601 * Connects 2 dapm widgets together via a named audio path. The sink is
1602 * the widget receiving the audio signal, whilst the source is the sender
1603 * of the audio signal.
1604 *
1605 * Returns 0 for success else error. On error all resources can be freed
1606 * with a call to snd_soc_card_free().
1607 */
1608 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1609 const struct snd_soc_dapm_route *route, int num)
1610 {
1611 int i, ret;
1612
1613 for (i = 0; i < num; i++) {
1614 ret = snd_soc_dapm_add_route(dapm, route);
1615 if (ret < 0) {
1616 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1617 route->source, route->sink);
1618 return ret;
1619 }
1620 route++;
1621 }
1622
1623 return 0;
1624 }
1625 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1626
1627 /**
1628 * snd_soc_dapm_new_widgets - add new dapm widgets
1629 * @dapm: DAPM context
1630 *
1631 * Checks the codec for any new dapm widgets and creates them if found.
1632 *
1633 * Returns 0 for success.
1634 */
1635 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
1636 {
1637 struct snd_soc_dapm_widget *w;
1638 unsigned int val;
1639
1640 list_for_each_entry(w, &dapm->card->widgets, list)
1641 {
1642 if (w->new)
1643 continue;
1644
1645 switch(w->id) {
1646 case snd_soc_dapm_switch:
1647 case snd_soc_dapm_mixer:
1648 case snd_soc_dapm_mixer_named_ctl:
1649 w->power_check = dapm_generic_check_power;
1650 dapm_new_mixer(dapm, w);
1651 break;
1652 case snd_soc_dapm_mux:
1653 case snd_soc_dapm_virt_mux:
1654 case snd_soc_dapm_value_mux:
1655 w->power_check = dapm_generic_check_power;
1656 dapm_new_mux(dapm, w);
1657 break;
1658 case snd_soc_dapm_adc:
1659 case snd_soc_dapm_aif_out:
1660 w->power_check = dapm_adc_check_power;
1661 break;
1662 case snd_soc_dapm_dac:
1663 case snd_soc_dapm_aif_in:
1664 w->power_check = dapm_dac_check_power;
1665 break;
1666 case snd_soc_dapm_pga:
1667 case snd_soc_dapm_out_drv:
1668 w->power_check = dapm_generic_check_power;
1669 dapm_new_pga(dapm, w);
1670 break;
1671 case snd_soc_dapm_input:
1672 case snd_soc_dapm_output:
1673 case snd_soc_dapm_micbias:
1674 case snd_soc_dapm_spk:
1675 case snd_soc_dapm_hp:
1676 case snd_soc_dapm_mic:
1677 case snd_soc_dapm_line:
1678 w->power_check = dapm_generic_check_power;
1679 break;
1680 case snd_soc_dapm_supply:
1681 w->power_check = dapm_supply_check_power;
1682 case snd_soc_dapm_vmid:
1683 case snd_soc_dapm_pre:
1684 case snd_soc_dapm_post:
1685 break;
1686 }
1687
1688 /* Read the initial power state from the device */
1689 if (w->reg >= 0) {
1690 val = snd_soc_read(w->codec, w->reg);
1691 val &= 1 << w->shift;
1692 if (w->invert)
1693 val = !val;
1694
1695 if (val)
1696 w->power = 1;
1697 }
1698
1699 w->new = 1;
1700 }
1701
1702 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1703 return 0;
1704 }
1705 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1706
1707 /**
1708 * snd_soc_dapm_get_volsw - dapm mixer get callback
1709 * @kcontrol: mixer control
1710 * @ucontrol: control element information
1711 *
1712 * Callback to get the value of a dapm mixer control.
1713 *
1714 * Returns 0 for success.
1715 */
1716 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1717 struct snd_ctl_elem_value *ucontrol)
1718 {
1719 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1720 struct soc_mixer_control *mc =
1721 (struct soc_mixer_control *)kcontrol->private_value;
1722 unsigned int reg = mc->reg;
1723 unsigned int shift = mc->shift;
1724 unsigned int rshift = mc->rshift;
1725 int max = mc->max;
1726 unsigned int invert = mc->invert;
1727 unsigned int mask = (1 << fls(max)) - 1;
1728
1729 ucontrol->value.integer.value[0] =
1730 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1731 if (shift != rshift)
1732 ucontrol->value.integer.value[1] =
1733 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1734 if (invert) {
1735 ucontrol->value.integer.value[0] =
1736 max - ucontrol->value.integer.value[0];
1737 if (shift != rshift)
1738 ucontrol->value.integer.value[1] =
1739 max - ucontrol->value.integer.value[1];
1740 }
1741
1742 return 0;
1743 }
1744 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1745
1746 /**
1747 * snd_soc_dapm_put_volsw - dapm mixer set callback
1748 * @kcontrol: mixer control
1749 * @ucontrol: control element information
1750 *
1751 * Callback to set the value of a dapm mixer control.
1752 *
1753 * Returns 0 for success.
1754 */
1755 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1756 struct snd_ctl_elem_value *ucontrol)
1757 {
1758 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1759 struct soc_mixer_control *mc =
1760 (struct soc_mixer_control *)kcontrol->private_value;
1761 unsigned int reg = mc->reg;
1762 unsigned int shift = mc->shift;
1763 int max = mc->max;
1764 unsigned int mask = (1 << fls(max)) - 1;
1765 unsigned int invert = mc->invert;
1766 unsigned int val;
1767 int connect, change;
1768 struct snd_soc_dapm_update update;
1769
1770 val = (ucontrol->value.integer.value[0] & mask);
1771
1772 if (invert)
1773 val = max - val;
1774 mask = mask << shift;
1775 val = val << shift;
1776
1777 mutex_lock(&widget->codec->mutex);
1778 widget->value = val;
1779
1780 change = snd_soc_test_bits(widget->codec, reg, mask, val);
1781 if (change) {
1782 if (val)
1783 /* new connection */
1784 connect = invert ? 0:1;
1785 else
1786 /* old connection must be powered down */
1787 connect = invert ? 1:0;
1788
1789 update.kcontrol = kcontrol;
1790 update.widget = widget;
1791 update.reg = reg;
1792 update.mask = mask;
1793 update.val = val;
1794 widget->dapm->update = &update;
1795
1796 dapm_mixer_update_power(widget, kcontrol, connect);
1797
1798 widget->dapm->update = NULL;
1799 }
1800
1801 mutex_unlock(&widget->codec->mutex);
1802 return 0;
1803 }
1804 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1805
1806 /**
1807 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1808 * @kcontrol: mixer control
1809 * @ucontrol: control element information
1810 *
1811 * Callback to get the value of a dapm enumerated double mixer control.
1812 *
1813 * Returns 0 for success.
1814 */
1815 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1816 struct snd_ctl_elem_value *ucontrol)
1817 {
1818 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1819 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1820 unsigned int val, bitmask;
1821
1822 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1823 ;
1824 val = snd_soc_read(widget->codec, e->reg);
1825 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1826 if (e->shift_l != e->shift_r)
1827 ucontrol->value.enumerated.item[1] =
1828 (val >> e->shift_r) & (bitmask - 1);
1829
1830 return 0;
1831 }
1832 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1833
1834 /**
1835 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1836 * @kcontrol: mixer control
1837 * @ucontrol: control element information
1838 *
1839 * Callback to set the value of a dapm enumerated double mixer control.
1840 *
1841 * Returns 0 for success.
1842 */
1843 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1844 struct snd_ctl_elem_value *ucontrol)
1845 {
1846 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1847 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1848 unsigned int val, mux, change;
1849 unsigned int mask, bitmask;
1850 struct snd_soc_dapm_update update;
1851
1852 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1853 ;
1854 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1855 return -EINVAL;
1856 mux = ucontrol->value.enumerated.item[0];
1857 val = mux << e->shift_l;
1858 mask = (bitmask - 1) << e->shift_l;
1859 if (e->shift_l != e->shift_r) {
1860 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1861 return -EINVAL;
1862 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1863 mask |= (bitmask - 1) << e->shift_r;
1864 }
1865
1866 mutex_lock(&widget->codec->mutex);
1867 widget->value = val;
1868 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1869
1870 update.kcontrol = kcontrol;
1871 update.widget = widget;
1872 update.reg = e->reg;
1873 update.mask = mask;
1874 update.val = val;
1875 widget->dapm->update = &update;
1876
1877 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1878
1879 widget->dapm->update = NULL;
1880
1881 mutex_unlock(&widget->codec->mutex);
1882 return change;
1883 }
1884 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1885
1886 /**
1887 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1888 * @kcontrol: mixer control
1889 * @ucontrol: control element information
1890 *
1891 * Returns 0 for success.
1892 */
1893 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
1894 struct snd_ctl_elem_value *ucontrol)
1895 {
1896 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1897
1898 ucontrol->value.enumerated.item[0] = widget->value;
1899
1900 return 0;
1901 }
1902 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
1903
1904 /**
1905 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1906 * @kcontrol: mixer control
1907 * @ucontrol: control element information
1908 *
1909 * Returns 0 for success.
1910 */
1911 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
1912 struct snd_ctl_elem_value *ucontrol)
1913 {
1914 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1915 struct soc_enum *e =
1916 (struct soc_enum *)kcontrol->private_value;
1917 int change;
1918 int ret = 0;
1919
1920 if (ucontrol->value.enumerated.item[0] >= e->max)
1921 return -EINVAL;
1922
1923 mutex_lock(&widget->codec->mutex);
1924
1925 change = widget->value != ucontrol->value.enumerated.item[0];
1926 widget->value = ucontrol->value.enumerated.item[0];
1927 dapm_mux_update_power(widget, kcontrol, change, widget->value, e);
1928
1929 mutex_unlock(&widget->codec->mutex);
1930 return ret;
1931 }
1932 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
1933
1934 /**
1935 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1936 * callback
1937 * @kcontrol: mixer control
1938 * @ucontrol: control element information
1939 *
1940 * Callback to get the value of a dapm semi enumerated double mixer control.
1941 *
1942 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1943 * used for handling bitfield coded enumeration for example.
1944 *
1945 * Returns 0 for success.
1946 */
1947 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1948 struct snd_ctl_elem_value *ucontrol)
1949 {
1950 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1951 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1952 unsigned int reg_val, val, mux;
1953
1954 reg_val = snd_soc_read(widget->codec, e->reg);
1955 val = (reg_val >> e->shift_l) & e->mask;
1956 for (mux = 0; mux < e->max; mux++) {
1957 if (val == e->values[mux])
1958 break;
1959 }
1960 ucontrol->value.enumerated.item[0] = mux;
1961 if (e->shift_l != e->shift_r) {
1962 val = (reg_val >> e->shift_r) & e->mask;
1963 for (mux = 0; mux < e->max; mux++) {
1964 if (val == e->values[mux])
1965 break;
1966 }
1967 ucontrol->value.enumerated.item[1] = mux;
1968 }
1969
1970 return 0;
1971 }
1972 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1973
1974 /**
1975 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1976 * callback
1977 * @kcontrol: mixer control
1978 * @ucontrol: control element information
1979 *
1980 * Callback to set the value of a dapm semi enumerated double mixer control.
1981 *
1982 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1983 * used for handling bitfield coded enumeration for example.
1984 *
1985 * Returns 0 for success.
1986 */
1987 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1988 struct snd_ctl_elem_value *ucontrol)
1989 {
1990 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1991 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1992 unsigned int val, mux, change;
1993 unsigned int mask;
1994 struct snd_soc_dapm_update update;
1995
1996 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1997 return -EINVAL;
1998 mux = ucontrol->value.enumerated.item[0];
1999 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2000 mask = e->mask << e->shift_l;
2001 if (e->shift_l != e->shift_r) {
2002 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2003 return -EINVAL;
2004 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2005 mask |= e->mask << e->shift_r;
2006 }
2007
2008 mutex_lock(&widget->codec->mutex);
2009 widget->value = val;
2010 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2011
2012 update.kcontrol = kcontrol;
2013 update.widget = widget;
2014 update.reg = e->reg;
2015 update.mask = mask;
2016 update.val = val;
2017 widget->dapm->update = &update;
2018
2019 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2020
2021 widget->dapm->update = NULL;
2022
2023 mutex_unlock(&widget->codec->mutex);
2024 return change;
2025 }
2026 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2027
2028 /**
2029 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2030 *
2031 * @kcontrol: mixer control
2032 * @uinfo: control element information
2033 *
2034 * Callback to provide information about a pin switch control.
2035 */
2036 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2037 struct snd_ctl_elem_info *uinfo)
2038 {
2039 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2040 uinfo->count = 1;
2041 uinfo->value.integer.min = 0;
2042 uinfo->value.integer.max = 1;
2043
2044 return 0;
2045 }
2046 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2047
2048 /**
2049 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2050 *
2051 * @kcontrol: mixer control
2052 * @ucontrol: Value
2053 */
2054 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2055 struct snd_ctl_elem_value *ucontrol)
2056 {
2057 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2058 const char *pin = (const char *)kcontrol->private_value;
2059
2060 mutex_lock(&codec->mutex);
2061
2062 ucontrol->value.integer.value[0] =
2063 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2064
2065 mutex_unlock(&codec->mutex);
2066
2067 return 0;
2068 }
2069 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2070
2071 /**
2072 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2073 *
2074 * @kcontrol: mixer control
2075 * @ucontrol: Value
2076 */
2077 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2078 struct snd_ctl_elem_value *ucontrol)
2079 {
2080 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2081 const char *pin = (const char *)kcontrol->private_value;
2082
2083 mutex_lock(&codec->mutex);
2084
2085 if (ucontrol->value.integer.value[0])
2086 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2087 else
2088 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2089
2090 snd_soc_dapm_sync(&codec->dapm);
2091
2092 mutex_unlock(&codec->mutex);
2093
2094 return 0;
2095 }
2096 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2097
2098 /**
2099 * snd_soc_dapm_new_control - create new dapm control
2100 * @dapm: DAPM context
2101 * @widget: widget template
2102 *
2103 * Creates a new dapm control based upon the template.
2104 *
2105 * Returns 0 for success else error.
2106 */
2107 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2108 const struct snd_soc_dapm_widget *widget)
2109 {
2110 struct snd_soc_dapm_widget *w;
2111 size_t name_len;
2112
2113 if ((w = dapm_cnew_widget(widget)) == NULL)
2114 return -ENOMEM;
2115
2116 name_len = strlen(widget->name) + 1;
2117 if (dapm->codec->name_prefix)
2118 name_len += 1 + strlen(dapm->codec->name_prefix);
2119 w->name = kmalloc(name_len, GFP_KERNEL);
2120 if (w->name == NULL) {
2121 kfree(w);
2122 return -ENOMEM;
2123 }
2124 if (dapm->codec->name_prefix)
2125 snprintf(w->name, name_len, "%s %s",
2126 dapm->codec->name_prefix, widget->name);
2127 else
2128 snprintf(w->name, name_len, "%s", widget->name);
2129
2130 dapm->n_widgets++;
2131 w->dapm = dapm;
2132 w->codec = dapm->codec;
2133 INIT_LIST_HEAD(&w->sources);
2134 INIT_LIST_HEAD(&w->sinks);
2135 INIT_LIST_HEAD(&w->list);
2136 list_add(&w->list, &dapm->card->widgets);
2137
2138 /* machine layer set ups unconnected pins and insertions */
2139 w->connected = 1;
2140 return 0;
2141 }
2142 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2143
2144 /**
2145 * snd_soc_dapm_new_controls - create new dapm controls
2146 * @dapm: DAPM context
2147 * @widget: widget array
2148 * @num: number of widgets
2149 *
2150 * Creates new DAPM controls based upon the templates.
2151 *
2152 * Returns 0 for success else error.
2153 */
2154 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2155 const struct snd_soc_dapm_widget *widget,
2156 int num)
2157 {
2158 int i, ret;
2159
2160 for (i = 0; i < num; i++) {
2161 ret = snd_soc_dapm_new_control(dapm, widget);
2162 if (ret < 0) {
2163 dev_err(dapm->dev,
2164 "ASoC: Failed to create DAPM control %s: %d\n",
2165 widget->name, ret);
2166 return ret;
2167 }
2168 widget++;
2169 }
2170 return 0;
2171 }
2172 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2173
2174 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2175 const char *stream, int event)
2176 {
2177 struct snd_soc_dapm_widget *w;
2178
2179 list_for_each_entry(w, &dapm->card->widgets, list)
2180 {
2181 if (!w->sname || w->dapm != dapm)
2182 continue;
2183 dev_dbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2184 w->name, w->sname, stream, event);
2185 if (strstr(w->sname, stream)) {
2186 switch(event) {
2187 case SND_SOC_DAPM_STREAM_START:
2188 w->active = 1;
2189 break;
2190 case SND_SOC_DAPM_STREAM_STOP:
2191 w->active = 0;
2192 break;
2193 case SND_SOC_DAPM_STREAM_SUSPEND:
2194 case SND_SOC_DAPM_STREAM_RESUME:
2195 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2196 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2197 break;
2198 }
2199 }
2200 }
2201
2202 dapm_power_widgets(dapm, event);
2203 }
2204
2205 /**
2206 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2207 * @rtd: PCM runtime data
2208 * @stream: stream name
2209 * @event: stream event
2210 *
2211 * Sends a stream event to the dapm core. The core then makes any
2212 * necessary widget power changes.
2213 *
2214 * Returns 0 for success else error.
2215 */
2216 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2217 const char *stream, int event)
2218 {
2219 struct snd_soc_codec *codec = rtd->codec;
2220
2221 if (stream == NULL)
2222 return 0;
2223
2224 mutex_lock(&codec->mutex);
2225 soc_dapm_stream_event(&codec->dapm, stream, event);
2226 mutex_unlock(&codec->mutex);
2227 return 0;
2228 }
2229 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2230
2231 /**
2232 * snd_soc_dapm_enable_pin - enable pin.
2233 * @dapm: DAPM context
2234 * @pin: pin name
2235 *
2236 * Enables input/output pin and its parents or children widgets iff there is
2237 * a valid audio route and active audio stream.
2238 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2239 * do any widget power switching.
2240 */
2241 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2242 {
2243 return snd_soc_dapm_set_pin(dapm, pin, 1);
2244 }
2245 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2246
2247 /**
2248 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2249 * @dapm: DAPM context
2250 * @pin: pin name
2251 *
2252 * Enables input/output pin regardless of any other state. This is
2253 * intended for use with microphone bias supplies used in microphone
2254 * jack detection.
2255 *
2256 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2257 * do any widget power switching.
2258 */
2259 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2260 const char *pin)
2261 {
2262 struct snd_soc_dapm_widget *w;
2263
2264 list_for_each_entry(w, &dapm->card->widgets, list) {
2265 if (w->dapm != dapm)
2266 continue;
2267 if (!strcmp(w->name, pin)) {
2268 dev_dbg(w->dapm->dev,
2269 "dapm: force enable pin %s\n", pin);
2270 w->connected = 1;
2271 w->force = 1;
2272 return 0;
2273 }
2274 }
2275
2276 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2277 return -EINVAL;
2278 }
2279 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2280
2281 /**
2282 * snd_soc_dapm_disable_pin - disable pin.
2283 * @dapm: DAPM context
2284 * @pin: pin name
2285 *
2286 * Disables input/output pin and its parents or children widgets.
2287 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2288 * do any widget power switching.
2289 */
2290 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2291 const char *pin)
2292 {
2293 return snd_soc_dapm_set_pin(dapm, pin, 0);
2294 }
2295 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2296
2297 /**
2298 * snd_soc_dapm_nc_pin - permanently disable pin.
2299 * @dapm: DAPM context
2300 * @pin: pin name
2301 *
2302 * Marks the specified pin as being not connected, disabling it along
2303 * any parent or child widgets. At present this is identical to
2304 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2305 * additional things such as disabling controls which only affect
2306 * paths through the pin.
2307 *
2308 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2309 * do any widget power switching.
2310 */
2311 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2312 {
2313 return snd_soc_dapm_set_pin(dapm, pin, 0);
2314 }
2315 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2316
2317 /**
2318 * snd_soc_dapm_get_pin_status - get audio pin status
2319 * @dapm: DAPM context
2320 * @pin: audio signal pin endpoint (or start point)
2321 *
2322 * Get audio pin status - connected or disconnected.
2323 *
2324 * Returns 1 for connected otherwise 0.
2325 */
2326 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2327 const char *pin)
2328 {
2329 struct snd_soc_dapm_widget *w;
2330
2331 list_for_each_entry(w, &dapm->card->widgets, list) {
2332 if (w->dapm != dapm)
2333 continue;
2334 if (!strcmp(w->name, pin))
2335 return w->connected;
2336 }
2337
2338 return 0;
2339 }
2340 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2341
2342 /**
2343 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2344 * @dapm: DAPM context
2345 * @pin: audio signal pin endpoint (or start point)
2346 *
2347 * Mark the given endpoint or pin as ignoring suspend. When the
2348 * system is disabled a path between two endpoints flagged as ignoring
2349 * suspend will not be disabled. The path must already be enabled via
2350 * normal means at suspend time, it will not be turned on if it was not
2351 * already enabled.
2352 */
2353 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2354 const char *pin)
2355 {
2356 struct snd_soc_dapm_widget *w;
2357
2358 list_for_each_entry(w, &dapm->card->widgets, list) {
2359 if (w->dapm != dapm)
2360 continue;
2361 if (!strcmp(w->name, pin)) {
2362 w->ignore_suspend = 1;
2363 return 0;
2364 }
2365 }
2366
2367 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2368 return -EINVAL;
2369 }
2370 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2371
2372 /**
2373 * snd_soc_dapm_free - free dapm resources
2374 * @card: SoC device
2375 *
2376 * Free all dapm widgets and resources.
2377 */
2378 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2379 {
2380 snd_soc_dapm_sys_remove(dapm->dev);
2381 dapm_free_widgets(dapm);
2382 list_del(&dapm->list);
2383 }
2384 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2385
2386 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2387 {
2388 struct snd_soc_dapm_widget *w;
2389 LIST_HEAD(down_list);
2390 int powerdown = 0;
2391
2392 list_for_each_entry(w, &dapm->card->widgets, list) {
2393 if (w->dapm != dapm)
2394 continue;
2395 if (w->power) {
2396 dapm_seq_insert(w, &down_list, dapm_down_seq);
2397 w->power = 0;
2398 powerdown = 1;
2399 }
2400 }
2401
2402 /* If there were no widgets to power down we're already in
2403 * standby.
2404 */
2405 if (powerdown) {
2406 snd_soc_dapm_set_bias_level(NULL, dapm, SND_SOC_BIAS_PREPARE);
2407 dapm_seq_run(dapm, &down_list, 0, dapm_down_seq);
2408 snd_soc_dapm_set_bias_level(NULL, dapm, SND_SOC_BIAS_STANDBY);
2409 }
2410 }
2411
2412 /*
2413 * snd_soc_dapm_shutdown - callback for system shutdown
2414 */
2415 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2416 {
2417 struct snd_soc_codec *codec;
2418
2419 list_for_each_entry(codec, &card->codec_dev_list, list) {
2420 soc_dapm_shutdown_codec(&codec->dapm);
2421 snd_soc_dapm_set_bias_level(card, &codec->dapm, SND_SOC_BIAS_OFF);
2422 }
2423 }
2424
2425 /* Module information */
2426 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2427 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2428 MODULE_LICENSE("GPL");