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ASoC: Add subsequence information to seq_notify 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/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 && path->sink->power_check &&
716 path->sink->power_check(path->sink)) {
717 power = 1;
718 break;
719 }
720 }
721
722 dapm_clear_walk(w->dapm);
723
724 return power;
725 }
726
727 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
728 struct snd_soc_dapm_widget *b,
729 bool power_up)
730 {
731 int *sort;
732
733 if (power_up)
734 sort = dapm_up_seq;
735 else
736 sort = dapm_down_seq;
737
738 if (sort[a->id] != sort[b->id])
739 return sort[a->id] - sort[b->id];
740 if (a->subseq != b->subseq) {
741 if (power_up)
742 return a->subseq - b->subseq;
743 else
744 return b->subseq - a->subseq;
745 }
746 if (a->reg != b->reg)
747 return a->reg - b->reg;
748 if (a->dapm != b->dapm)
749 return (unsigned long)a->dapm - (unsigned long)b->dapm;
750
751 return 0;
752 }
753
754 /* Insert a widget in order into a DAPM power sequence. */
755 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
756 struct list_head *list,
757 bool power_up)
758 {
759 struct snd_soc_dapm_widget *w;
760
761 list_for_each_entry(w, list, power_list)
762 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
763 list_add_tail(&new_widget->power_list, &w->power_list);
764 return;
765 }
766
767 list_add_tail(&new_widget->power_list, list);
768 }
769
770 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
771 struct snd_soc_dapm_widget *w, int event)
772 {
773 struct snd_soc_card *card = dapm->card;
774 const char *ev_name;
775 int power, ret;
776
777 switch (event) {
778 case SND_SOC_DAPM_PRE_PMU:
779 ev_name = "PRE_PMU";
780 power = 1;
781 break;
782 case SND_SOC_DAPM_POST_PMU:
783 ev_name = "POST_PMU";
784 power = 1;
785 break;
786 case SND_SOC_DAPM_PRE_PMD:
787 ev_name = "PRE_PMD";
788 power = 0;
789 break;
790 case SND_SOC_DAPM_POST_PMD:
791 ev_name = "POST_PMD";
792 power = 0;
793 break;
794 default:
795 BUG();
796 return;
797 }
798
799 if (w->power != power)
800 return;
801
802 if (w->event && (w->event_flags & event)) {
803 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
804 w->name, ev_name);
805 trace_snd_soc_dapm_widget_event_start(w, event);
806 ret = w->event(w, NULL, event);
807 trace_snd_soc_dapm_widget_event_done(w, event);
808 if (ret < 0)
809 pr_err("%s: %s event failed: %d\n",
810 ev_name, w->name, ret);
811 }
812 }
813
814 /* Apply the coalesced changes from a DAPM sequence */
815 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
816 struct list_head *pending)
817 {
818 struct snd_soc_card *card = dapm->card;
819 struct snd_soc_dapm_widget *w;
820 int reg, power;
821 unsigned int value = 0;
822 unsigned int mask = 0;
823 unsigned int cur_mask;
824
825 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
826 power_list)->reg;
827
828 list_for_each_entry(w, pending, power_list) {
829 cur_mask = 1 << w->shift;
830 BUG_ON(reg != w->reg);
831
832 if (w->invert)
833 power = !w->power;
834 else
835 power = w->power;
836
837 mask |= cur_mask;
838 if (power)
839 value |= cur_mask;
840
841 pop_dbg(dapm->dev, card->pop_time,
842 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
843 w->name, reg, value, mask);
844
845 /* Check for events */
846 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
847 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
848 }
849
850 if (reg >= 0) {
851 pop_dbg(dapm->dev, card->pop_time,
852 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
853 value, mask, reg, card->pop_time);
854 pop_wait(card->pop_time);
855 snd_soc_update_bits(dapm->codec, reg, mask, value);
856 }
857
858 list_for_each_entry(w, pending, power_list) {
859 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
860 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
861 }
862 }
863
864 /* Apply a DAPM power sequence.
865 *
866 * We walk over a pre-sorted list of widgets to apply power to. In
867 * order to minimise the number of writes to the device required
868 * multiple widgets will be updated in a single write where possible.
869 * Currently anything that requires more than a single write is not
870 * handled.
871 */
872 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
873 struct list_head *list, int event, bool power_up)
874 {
875 struct snd_soc_dapm_widget *w, *n;
876 LIST_HEAD(pending);
877 int cur_sort = -1;
878 int cur_subseq = -1;
879 int cur_reg = SND_SOC_NOPM;
880 struct snd_soc_dapm_context *cur_dapm = NULL;
881 int ret, i;
882 int *sort;
883
884 if (power_up)
885 sort = dapm_up_seq;
886 else
887 sort = dapm_down_seq;
888
889 list_for_each_entry_safe(w, n, list, power_list) {
890 ret = 0;
891
892 /* Do we need to apply any queued changes? */
893 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
894 w->dapm != cur_dapm || w->subseq != cur_subseq) {
895 if (!list_empty(&pending))
896 dapm_seq_run_coalesced(cur_dapm, &pending);
897
898 if (cur_dapm && cur_dapm->seq_notifier) {
899 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
900 if (sort[i] == cur_sort)
901 cur_dapm->seq_notifier(cur_dapm,
902 i,
903 cur_subseq);
904 }
905
906 INIT_LIST_HEAD(&pending);
907 cur_sort = -1;
908 cur_subseq = -1;
909 cur_reg = SND_SOC_NOPM;
910 cur_dapm = NULL;
911 }
912
913 switch (w->id) {
914 case snd_soc_dapm_pre:
915 if (!w->event)
916 list_for_each_entry_safe_continue(w, n, list,
917 power_list);
918
919 if (event == SND_SOC_DAPM_STREAM_START)
920 ret = w->event(w,
921 NULL, SND_SOC_DAPM_PRE_PMU);
922 else if (event == SND_SOC_DAPM_STREAM_STOP)
923 ret = w->event(w,
924 NULL, SND_SOC_DAPM_PRE_PMD);
925 break;
926
927 case snd_soc_dapm_post:
928 if (!w->event)
929 list_for_each_entry_safe_continue(w, n, list,
930 power_list);
931
932 if (event == SND_SOC_DAPM_STREAM_START)
933 ret = w->event(w,
934 NULL, SND_SOC_DAPM_POST_PMU);
935 else if (event == SND_SOC_DAPM_STREAM_STOP)
936 ret = w->event(w,
937 NULL, SND_SOC_DAPM_POST_PMD);
938 break;
939
940 case snd_soc_dapm_input:
941 case snd_soc_dapm_output:
942 case snd_soc_dapm_hp:
943 case snd_soc_dapm_mic:
944 case snd_soc_dapm_line:
945 case snd_soc_dapm_spk:
946 /* No register support currently */
947 ret = dapm_generic_apply_power(w);
948 break;
949
950 default:
951 /* Queue it up for application */
952 cur_sort = sort[w->id];
953 cur_subseq = w->subseq;
954 cur_reg = w->reg;
955 cur_dapm = w->dapm;
956 list_move(&w->power_list, &pending);
957 break;
958 }
959
960 if (ret < 0)
961 dev_err(w->dapm->dev,
962 "Failed to apply widget power: %d\n", ret);
963 }
964
965 if (!list_empty(&pending))
966 dapm_seq_run_coalesced(dapm, &pending);
967
968 if (cur_dapm && cur_dapm->seq_notifier) {
969 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
970 if (sort[i] == cur_sort)
971 cur_dapm->seq_notifier(cur_dapm,
972 i, cur_subseq);
973 }
974 }
975
976 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
977 {
978 struct snd_soc_dapm_update *update = dapm->update;
979 struct snd_soc_dapm_widget *w;
980 int ret;
981
982 if (!update)
983 return;
984
985 w = update->widget;
986
987 if (w->event &&
988 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
989 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
990 if (ret != 0)
991 pr_err("%s DAPM pre-event failed: %d\n",
992 w->name, ret);
993 }
994
995 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
996 update->val);
997 if (ret < 0)
998 pr_err("%s DAPM update failed: %d\n", w->name, ret);
999
1000 if (w->event &&
1001 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1002 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1003 if (ret != 0)
1004 pr_err("%s DAPM post-event failed: %d\n",
1005 w->name, ret);
1006 }
1007 }
1008
1009
1010
1011 /*
1012 * Scan each dapm widget for complete audio path.
1013 * A complete path is a route that has valid endpoints i.e.:-
1014 *
1015 * o DAC to output pin.
1016 * o Input Pin to ADC.
1017 * o Input pin to Output pin (bypass, sidetone)
1018 * o DAC to ADC (loopback).
1019 */
1020 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
1021 {
1022 struct snd_soc_card *card = dapm->codec->card;
1023 struct snd_soc_dapm_widget *w;
1024 struct snd_soc_dapm_context *d;
1025 LIST_HEAD(up_list);
1026 LIST_HEAD(down_list);
1027 int ret = 0;
1028 int power;
1029
1030 trace_snd_soc_dapm_start(card);
1031
1032 list_for_each_entry(d, &card->dapm_list, list)
1033 if (d->n_widgets)
1034 d->dev_power = 0;
1035
1036 /* Check which widgets we need to power and store them in
1037 * lists indicating if they should be powered up or down.
1038 */
1039 list_for_each_entry(w, &card->widgets, list) {
1040 switch (w->id) {
1041 case snd_soc_dapm_pre:
1042 dapm_seq_insert(w, &down_list, false);
1043 break;
1044 case snd_soc_dapm_post:
1045 dapm_seq_insert(w, &up_list, true);
1046 break;
1047
1048 default:
1049 if (!w->power_check)
1050 continue;
1051
1052 if (!w->force)
1053 power = w->power_check(w);
1054 else
1055 power = 1;
1056 if (power)
1057 w->dapm->dev_power = 1;
1058
1059 if (w->power == power)
1060 continue;
1061
1062 trace_snd_soc_dapm_widget_power(w, power);
1063
1064 if (power)
1065 dapm_seq_insert(w, &up_list, true);
1066 else
1067 dapm_seq_insert(w, &down_list, false);
1068
1069 w->power = power;
1070 break;
1071 }
1072 }
1073
1074 /* If there are no DAPM widgets then try to figure out power from the
1075 * event type.
1076 */
1077 if (!dapm->n_widgets) {
1078 switch (event) {
1079 case SND_SOC_DAPM_STREAM_START:
1080 case SND_SOC_DAPM_STREAM_RESUME:
1081 dapm->dev_power = 1;
1082 break;
1083 case SND_SOC_DAPM_STREAM_STOP:
1084 dapm->dev_power = !!dapm->codec->active;
1085 break;
1086 case SND_SOC_DAPM_STREAM_SUSPEND:
1087 dapm->dev_power = 0;
1088 break;
1089 case SND_SOC_DAPM_STREAM_NOP:
1090 switch (dapm->bias_level) {
1091 case SND_SOC_BIAS_STANDBY:
1092 case SND_SOC_BIAS_OFF:
1093 dapm->dev_power = 0;
1094 break;
1095 default:
1096 dapm->dev_power = 1;
1097 break;
1098 }
1099 break;
1100 default:
1101 break;
1102 }
1103 }
1104
1105 list_for_each_entry(d, &dapm->card->dapm_list, list) {
1106 if (d->dev_power && d->bias_level == SND_SOC_BIAS_OFF) {
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 turn on bias: %d\n", ret);
1112 }
1113
1114 /* If we're changing to all on or all off then prepare */
1115 if ((d->dev_power && d->bias_level == SND_SOC_BIAS_STANDBY) ||
1116 (!d->dev_power && d->bias_level == SND_SOC_BIAS_ON)) {
1117 ret = snd_soc_dapm_set_bias_level(card, d,
1118 SND_SOC_BIAS_PREPARE);
1119 if (ret != 0)
1120 dev_err(d->dev,
1121 "Failed to prepare bias: %d\n", ret);
1122 }
1123 }
1124
1125 /* Power down widgets first; try to avoid amplifying pops. */
1126 dapm_seq_run(dapm, &down_list, event, false);
1127
1128 dapm_widget_update(dapm);
1129
1130 /* Now power up. */
1131 dapm_seq_run(dapm, &up_list, event, true);
1132
1133 list_for_each_entry(d, &dapm->card->dapm_list, list) {
1134 /* If we just powered the last thing off drop to standby bias */
1135 if (d->bias_level == SND_SOC_BIAS_PREPARE && !d->dev_power) {
1136 ret = snd_soc_dapm_set_bias_level(card, d,
1137 SND_SOC_BIAS_STANDBY);
1138 if (ret != 0)
1139 dev_err(d->dev,
1140 "Failed to apply standby bias: %d\n",
1141 ret);
1142 }
1143
1144 /* If we're in standby and can support bias off then do that */
1145 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1146 d->idle_bias_off) {
1147 ret = snd_soc_dapm_set_bias_level(card, d,
1148 SND_SOC_BIAS_OFF);
1149 if (ret != 0)
1150 dev_err(d->dev,
1151 "Failed to turn off bias: %d\n", ret);
1152 }
1153
1154 /* If we just powered up then move to active bias */
1155 if (d->bias_level == SND_SOC_BIAS_PREPARE && d->dev_power) {
1156 ret = snd_soc_dapm_set_bias_level(card, d,
1157 SND_SOC_BIAS_ON);
1158 if (ret != 0)
1159 dev_err(d->dev,
1160 "Failed to apply active bias: %d\n",
1161 ret);
1162 }
1163 }
1164
1165 pop_dbg(dapm->dev, card->pop_time,
1166 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1167 pop_wait(card->pop_time);
1168
1169 trace_snd_soc_dapm_done(card);
1170
1171 return 0;
1172 }
1173
1174 #ifdef CONFIG_DEBUG_FS
1175 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1176 {
1177 file->private_data = inode->i_private;
1178 return 0;
1179 }
1180
1181 static ssize_t dapm_widget_power_read_file(struct file *file,
1182 char __user *user_buf,
1183 size_t count, loff_t *ppos)
1184 {
1185 struct snd_soc_dapm_widget *w = file->private_data;
1186 char *buf;
1187 int in, out;
1188 ssize_t ret;
1189 struct snd_soc_dapm_path *p = NULL;
1190
1191 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1192 if (!buf)
1193 return -ENOMEM;
1194
1195 in = is_connected_input_ep(w);
1196 dapm_clear_walk(w->dapm);
1197 out = is_connected_output_ep(w);
1198 dapm_clear_walk(w->dapm);
1199
1200 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1201 w->name, w->power ? "On" : "Off", in, out);
1202
1203 if (w->reg >= 0)
1204 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1205 " - R%d(0x%x) bit %d",
1206 w->reg, w->reg, w->shift);
1207
1208 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1209
1210 if (w->sname)
1211 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1212 w->sname,
1213 w->active ? "active" : "inactive");
1214
1215 list_for_each_entry(p, &w->sources, list_sink) {
1216 if (p->connected && !p->connected(w, p->sink))
1217 continue;
1218
1219 if (p->connect)
1220 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1221 " in %s %s\n",
1222 p->name ? p->name : "static",
1223 p->source->name);
1224 }
1225 list_for_each_entry(p, &w->sinks, list_source) {
1226 if (p->connected && !p->connected(w, p->sink))
1227 continue;
1228
1229 if (p->connect)
1230 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1231 " out %s %s\n",
1232 p->name ? p->name : "static",
1233 p->sink->name);
1234 }
1235
1236 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1237
1238 kfree(buf);
1239 return ret;
1240 }
1241
1242 static const struct file_operations dapm_widget_power_fops = {
1243 .open = dapm_widget_power_open_file,
1244 .read = dapm_widget_power_read_file,
1245 .llseek = default_llseek,
1246 };
1247
1248 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm)
1249 {
1250 struct snd_soc_dapm_widget *w;
1251 struct dentry *d;
1252
1253 if (!dapm->debugfs_dapm)
1254 return;
1255
1256 list_for_each_entry(w, &dapm->card->widgets, list) {
1257 if (!w->name || w->dapm != dapm)
1258 continue;
1259
1260 d = debugfs_create_file(w->name, 0444,
1261 dapm->debugfs_dapm, w,
1262 &dapm_widget_power_fops);
1263 if (!d)
1264 dev_warn(w->dapm->dev,
1265 "ASoC: Failed to create %s debugfs file\n",
1266 w->name);
1267 }
1268 }
1269 #else
1270 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm)
1271 {
1272 }
1273 #endif
1274
1275 /* test and update the power status of a mux widget */
1276 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1277 struct snd_kcontrol *kcontrol, int change,
1278 int mux, struct soc_enum *e)
1279 {
1280 struct snd_soc_dapm_path *path;
1281 int found = 0;
1282
1283 if (widget->id != snd_soc_dapm_mux &&
1284 widget->id != snd_soc_dapm_virt_mux &&
1285 widget->id != snd_soc_dapm_value_mux)
1286 return -ENODEV;
1287
1288 if (!change)
1289 return 0;
1290
1291 /* find dapm widget path assoc with kcontrol */
1292 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1293 if (path->kcontrol != kcontrol)
1294 continue;
1295
1296 if (!path->name || !e->texts[mux])
1297 continue;
1298
1299 found = 1;
1300 /* we now need to match the string in the enum to the path */
1301 if (!(strcmp(path->name, e->texts[mux])))
1302 path->connect = 1; /* new connection */
1303 else
1304 path->connect = 0; /* old connection must be powered down */
1305 }
1306
1307 if (found)
1308 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1309
1310 return 0;
1311 }
1312
1313 /* test and update the power status of a mixer or switch widget */
1314 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1315 struct snd_kcontrol *kcontrol, int connect)
1316 {
1317 struct snd_soc_dapm_path *path;
1318 int found = 0;
1319
1320 if (widget->id != snd_soc_dapm_mixer &&
1321 widget->id != snd_soc_dapm_mixer_named_ctl &&
1322 widget->id != snd_soc_dapm_switch)
1323 return -ENODEV;
1324
1325 /* find dapm widget path assoc with kcontrol */
1326 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1327 if (path->kcontrol != kcontrol)
1328 continue;
1329
1330 /* found, now check type */
1331 found = 1;
1332 path->connect = connect;
1333 break;
1334 }
1335
1336 if (found)
1337 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1338
1339 return 0;
1340 }
1341
1342 /* show dapm widget status in sys fs */
1343 static ssize_t dapm_widget_show(struct device *dev,
1344 struct device_attribute *attr, char *buf)
1345 {
1346 struct snd_soc_pcm_runtime *rtd =
1347 container_of(dev, struct snd_soc_pcm_runtime, dev);
1348 struct snd_soc_codec *codec =rtd->codec;
1349 struct snd_soc_dapm_widget *w;
1350 int count = 0;
1351 char *state = "not set";
1352
1353 list_for_each_entry(w, &codec->card->widgets, list) {
1354 if (w->dapm != &codec->dapm)
1355 continue;
1356
1357 /* only display widgets that burnm power */
1358 switch (w->id) {
1359 case snd_soc_dapm_hp:
1360 case snd_soc_dapm_mic:
1361 case snd_soc_dapm_spk:
1362 case snd_soc_dapm_line:
1363 case snd_soc_dapm_micbias:
1364 case snd_soc_dapm_dac:
1365 case snd_soc_dapm_adc:
1366 case snd_soc_dapm_pga:
1367 case snd_soc_dapm_out_drv:
1368 case snd_soc_dapm_mixer:
1369 case snd_soc_dapm_mixer_named_ctl:
1370 case snd_soc_dapm_supply:
1371 if (w->name)
1372 count += sprintf(buf + count, "%s: %s\n",
1373 w->name, w->power ? "On":"Off");
1374 break;
1375 default:
1376 break;
1377 }
1378 }
1379
1380 switch (codec->dapm.bias_level) {
1381 case SND_SOC_BIAS_ON:
1382 state = "On";
1383 break;
1384 case SND_SOC_BIAS_PREPARE:
1385 state = "Prepare";
1386 break;
1387 case SND_SOC_BIAS_STANDBY:
1388 state = "Standby";
1389 break;
1390 case SND_SOC_BIAS_OFF:
1391 state = "Off";
1392 break;
1393 }
1394 count += sprintf(buf + count, "PM State: %s\n", state);
1395
1396 return count;
1397 }
1398
1399 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1400
1401 int snd_soc_dapm_sys_add(struct device *dev)
1402 {
1403 return device_create_file(dev, &dev_attr_dapm_widget);
1404 }
1405
1406 static void snd_soc_dapm_sys_remove(struct device *dev)
1407 {
1408 device_remove_file(dev, &dev_attr_dapm_widget);
1409 }
1410
1411 /* free all dapm widgets and resources */
1412 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1413 {
1414 struct snd_soc_dapm_widget *w, *next_w;
1415 struct snd_soc_dapm_path *p, *next_p;
1416
1417 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1418 if (w->dapm != dapm)
1419 continue;
1420 list_del(&w->list);
1421 /*
1422 * remove source and sink paths associated to this widget.
1423 * While removing the path, remove reference to it from both
1424 * source and sink widgets so that path is removed only once.
1425 */
1426 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1427 list_del(&p->list_sink);
1428 list_del(&p->list_source);
1429 list_del(&p->list);
1430 kfree(p->long_name);
1431 kfree(p);
1432 }
1433 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1434 list_del(&p->list_sink);
1435 list_del(&p->list_source);
1436 list_del(&p->list);
1437 kfree(p->long_name);
1438 kfree(p);
1439 }
1440 kfree(w->name);
1441 kfree(w);
1442 }
1443 }
1444
1445 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1446 const char *pin, int status)
1447 {
1448 struct snd_soc_dapm_widget *w;
1449
1450 list_for_each_entry(w, &dapm->card->widgets, list) {
1451 if (w->dapm != dapm)
1452 continue;
1453 if (!strcmp(w->name, pin)) {
1454 dev_dbg(w->dapm->dev, "dapm: pin %s = %d\n",
1455 pin, status);
1456 w->connected = status;
1457 /* Allow disabling of forced pins */
1458 if (status == 0)
1459 w->force = 0;
1460 return 0;
1461 }
1462 }
1463
1464 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1465 return -EINVAL;
1466 }
1467
1468 /**
1469 * snd_soc_dapm_sync - scan and power dapm paths
1470 * @dapm: DAPM context
1471 *
1472 * Walks all dapm audio paths and powers widgets according to their
1473 * stream or path usage.
1474 *
1475 * Returns 0 for success.
1476 */
1477 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1478 {
1479 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1480 }
1481 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1482
1483 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1484 const struct snd_soc_dapm_route *route)
1485 {
1486 struct snd_soc_dapm_path *path;
1487 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1488 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1489 const char *sink;
1490 const char *control = route->control;
1491 const char *source;
1492 char prefixed_sink[80];
1493 char prefixed_source[80];
1494 int ret = 0;
1495
1496 if (dapm->codec->name_prefix) {
1497 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1498 dapm->codec->name_prefix, route->sink);
1499 sink = prefixed_sink;
1500 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1501 dapm->codec->name_prefix, route->source);
1502 source = prefixed_source;
1503 } else {
1504 sink = route->sink;
1505 source = route->source;
1506 }
1507
1508 /*
1509 * find src and dest widgets over all widgets but favor a widget from
1510 * current DAPM context
1511 */
1512 list_for_each_entry(w, &dapm->card->widgets, list) {
1513 if (!wsink && !(strcmp(w->name, sink))) {
1514 wtsink = w;
1515 if (w->dapm == dapm)
1516 wsink = w;
1517 continue;
1518 }
1519 if (!wsource && !(strcmp(w->name, source))) {
1520 wtsource = w;
1521 if (w->dapm == dapm)
1522 wsource = w;
1523 }
1524 }
1525 /* use widget from another DAPM context if not found from this */
1526 if (!wsink)
1527 wsink = wtsink;
1528 if (!wsource)
1529 wsource = wtsource;
1530
1531 if (wsource == NULL || wsink == NULL)
1532 return -ENODEV;
1533
1534 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1535 if (!path)
1536 return -ENOMEM;
1537
1538 path->source = wsource;
1539 path->sink = wsink;
1540 path->connected = route->connected;
1541 INIT_LIST_HEAD(&path->list);
1542 INIT_LIST_HEAD(&path->list_source);
1543 INIT_LIST_HEAD(&path->list_sink);
1544
1545 /* check for external widgets */
1546 if (wsink->id == snd_soc_dapm_input) {
1547 if (wsource->id == snd_soc_dapm_micbias ||
1548 wsource->id == snd_soc_dapm_mic ||
1549 wsource->id == snd_soc_dapm_line ||
1550 wsource->id == snd_soc_dapm_output)
1551 wsink->ext = 1;
1552 }
1553 if (wsource->id == snd_soc_dapm_output) {
1554 if (wsink->id == snd_soc_dapm_spk ||
1555 wsink->id == snd_soc_dapm_hp ||
1556 wsink->id == snd_soc_dapm_line ||
1557 wsink->id == snd_soc_dapm_input)
1558 wsource->ext = 1;
1559 }
1560
1561 /* connect static paths */
1562 if (control == NULL) {
1563 list_add(&path->list, &dapm->card->paths);
1564 list_add(&path->list_sink, &wsink->sources);
1565 list_add(&path->list_source, &wsource->sinks);
1566 path->connect = 1;
1567 return 0;
1568 }
1569
1570 /* connect dynamic paths */
1571 switch(wsink->id) {
1572 case snd_soc_dapm_adc:
1573 case snd_soc_dapm_dac:
1574 case snd_soc_dapm_pga:
1575 case snd_soc_dapm_out_drv:
1576 case snd_soc_dapm_input:
1577 case snd_soc_dapm_output:
1578 case snd_soc_dapm_micbias:
1579 case snd_soc_dapm_vmid:
1580 case snd_soc_dapm_pre:
1581 case snd_soc_dapm_post:
1582 case snd_soc_dapm_supply:
1583 case snd_soc_dapm_aif_in:
1584 case snd_soc_dapm_aif_out:
1585 list_add(&path->list, &dapm->card->paths);
1586 list_add(&path->list_sink, &wsink->sources);
1587 list_add(&path->list_source, &wsource->sinks);
1588 path->connect = 1;
1589 return 0;
1590 case snd_soc_dapm_mux:
1591 case snd_soc_dapm_virt_mux:
1592 case snd_soc_dapm_value_mux:
1593 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1594 &wsink->kcontrols[0]);
1595 if (ret != 0)
1596 goto err;
1597 break;
1598 case snd_soc_dapm_switch:
1599 case snd_soc_dapm_mixer:
1600 case snd_soc_dapm_mixer_named_ctl:
1601 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1602 if (ret != 0)
1603 goto err;
1604 break;
1605 case snd_soc_dapm_hp:
1606 case snd_soc_dapm_mic:
1607 case snd_soc_dapm_line:
1608 case snd_soc_dapm_spk:
1609 list_add(&path->list, &dapm->card->paths);
1610 list_add(&path->list_sink, &wsink->sources);
1611 list_add(&path->list_source, &wsource->sinks);
1612 path->connect = 0;
1613 return 0;
1614 }
1615 return 0;
1616
1617 err:
1618 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1619 source, control, sink);
1620 kfree(path);
1621 return ret;
1622 }
1623
1624 /**
1625 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1626 * @dapm: DAPM context
1627 * @route: audio routes
1628 * @num: number of routes
1629 *
1630 * Connects 2 dapm widgets together via a named audio path. The sink is
1631 * the widget receiving the audio signal, whilst the source is the sender
1632 * of the audio signal.
1633 *
1634 * Returns 0 for success else error. On error all resources can be freed
1635 * with a call to snd_soc_card_free().
1636 */
1637 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1638 const struct snd_soc_dapm_route *route, int num)
1639 {
1640 int i, ret;
1641
1642 for (i = 0; i < num; i++) {
1643 ret = snd_soc_dapm_add_route(dapm, route);
1644 if (ret < 0) {
1645 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1646 route->source, route->sink);
1647 return ret;
1648 }
1649 route++;
1650 }
1651
1652 return 0;
1653 }
1654 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1655
1656 /**
1657 * snd_soc_dapm_new_widgets - add new dapm widgets
1658 * @dapm: DAPM context
1659 *
1660 * Checks the codec for any new dapm widgets and creates them if found.
1661 *
1662 * Returns 0 for success.
1663 */
1664 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
1665 {
1666 struct snd_soc_dapm_widget *w;
1667
1668 list_for_each_entry(w, &dapm->card->widgets, list)
1669 {
1670 if (w->new)
1671 continue;
1672
1673 switch(w->id) {
1674 case snd_soc_dapm_switch:
1675 case snd_soc_dapm_mixer:
1676 case snd_soc_dapm_mixer_named_ctl:
1677 w->power_check = dapm_generic_check_power;
1678 dapm_new_mixer(dapm, w);
1679 break;
1680 case snd_soc_dapm_mux:
1681 case snd_soc_dapm_virt_mux:
1682 case snd_soc_dapm_value_mux:
1683 w->power_check = dapm_generic_check_power;
1684 dapm_new_mux(dapm, w);
1685 break;
1686 case snd_soc_dapm_adc:
1687 case snd_soc_dapm_aif_out:
1688 w->power_check = dapm_adc_check_power;
1689 break;
1690 case snd_soc_dapm_dac:
1691 case snd_soc_dapm_aif_in:
1692 w->power_check = dapm_dac_check_power;
1693 break;
1694 case snd_soc_dapm_pga:
1695 case snd_soc_dapm_out_drv:
1696 w->power_check = dapm_generic_check_power;
1697 dapm_new_pga(dapm, w);
1698 break;
1699 case snd_soc_dapm_input:
1700 case snd_soc_dapm_output:
1701 case snd_soc_dapm_micbias:
1702 case snd_soc_dapm_spk:
1703 case snd_soc_dapm_hp:
1704 case snd_soc_dapm_mic:
1705 case snd_soc_dapm_line:
1706 w->power_check = dapm_generic_check_power;
1707 break;
1708 case snd_soc_dapm_supply:
1709 w->power_check = dapm_supply_check_power;
1710 case snd_soc_dapm_vmid:
1711 case snd_soc_dapm_pre:
1712 case snd_soc_dapm_post:
1713 break;
1714 }
1715 w->new = 1;
1716 }
1717
1718 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1719 return 0;
1720 }
1721 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1722
1723 /**
1724 * snd_soc_dapm_get_volsw - dapm mixer get callback
1725 * @kcontrol: mixer control
1726 * @ucontrol: control element information
1727 *
1728 * Callback to get the value of a dapm mixer control.
1729 *
1730 * Returns 0 for success.
1731 */
1732 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1733 struct snd_ctl_elem_value *ucontrol)
1734 {
1735 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1736 struct soc_mixer_control *mc =
1737 (struct soc_mixer_control *)kcontrol->private_value;
1738 unsigned int reg = mc->reg;
1739 unsigned int shift = mc->shift;
1740 unsigned int rshift = mc->rshift;
1741 int max = mc->max;
1742 unsigned int invert = mc->invert;
1743 unsigned int mask = (1 << fls(max)) - 1;
1744
1745 ucontrol->value.integer.value[0] =
1746 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1747 if (shift != rshift)
1748 ucontrol->value.integer.value[1] =
1749 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1750 if (invert) {
1751 ucontrol->value.integer.value[0] =
1752 max - ucontrol->value.integer.value[0];
1753 if (shift != rshift)
1754 ucontrol->value.integer.value[1] =
1755 max - ucontrol->value.integer.value[1];
1756 }
1757
1758 return 0;
1759 }
1760 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1761
1762 /**
1763 * snd_soc_dapm_put_volsw - dapm mixer set callback
1764 * @kcontrol: mixer control
1765 * @ucontrol: control element information
1766 *
1767 * Callback to set the value of a dapm mixer control.
1768 *
1769 * Returns 0 for success.
1770 */
1771 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1772 struct snd_ctl_elem_value *ucontrol)
1773 {
1774 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1775 struct soc_mixer_control *mc =
1776 (struct soc_mixer_control *)kcontrol->private_value;
1777 unsigned int reg = mc->reg;
1778 unsigned int shift = mc->shift;
1779 int max = mc->max;
1780 unsigned int mask = (1 << fls(max)) - 1;
1781 unsigned int invert = mc->invert;
1782 unsigned int val, val_mask;
1783 int connect, change;
1784 struct snd_soc_dapm_update update;
1785
1786 val = (ucontrol->value.integer.value[0] & mask);
1787
1788 if (invert)
1789 val = max - val;
1790 val_mask = mask << shift;
1791 val = val << shift;
1792
1793 mutex_lock(&widget->codec->mutex);
1794 widget->value = val;
1795
1796 change = snd_soc_test_bits(widget->codec, reg, val_mask, val);
1797 if (change) {
1798 if (val)
1799 /* new connection */
1800 connect = invert ? 0:1;
1801 else
1802 /* old connection must be powered down */
1803 connect = invert ? 1:0;
1804
1805 update.kcontrol = kcontrol;
1806 update.widget = widget;
1807 update.reg = reg;
1808 update.mask = mask;
1809 update.val = val;
1810 widget->dapm->update = &update;
1811
1812 dapm_mixer_update_power(widget, kcontrol, connect);
1813
1814 widget->dapm->update = NULL;
1815 }
1816
1817 mutex_unlock(&widget->codec->mutex);
1818 return 0;
1819 }
1820 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1821
1822 /**
1823 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1824 * @kcontrol: mixer control
1825 * @ucontrol: control element information
1826 *
1827 * Callback to get the value of a dapm enumerated double mixer control.
1828 *
1829 * Returns 0 for success.
1830 */
1831 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1832 struct snd_ctl_elem_value *ucontrol)
1833 {
1834 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1835 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1836 unsigned int val, bitmask;
1837
1838 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1839 ;
1840 val = snd_soc_read(widget->codec, e->reg);
1841 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1842 if (e->shift_l != e->shift_r)
1843 ucontrol->value.enumerated.item[1] =
1844 (val >> e->shift_r) & (bitmask - 1);
1845
1846 return 0;
1847 }
1848 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1849
1850 /**
1851 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1852 * @kcontrol: mixer control
1853 * @ucontrol: control element information
1854 *
1855 * Callback to set the value of a dapm enumerated double mixer control.
1856 *
1857 * Returns 0 for success.
1858 */
1859 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1860 struct snd_ctl_elem_value *ucontrol)
1861 {
1862 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1863 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1864 unsigned int val, mux, change;
1865 unsigned int mask, bitmask;
1866 struct snd_soc_dapm_update update;
1867
1868 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1869 ;
1870 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1871 return -EINVAL;
1872 mux = ucontrol->value.enumerated.item[0];
1873 val = mux << e->shift_l;
1874 mask = (bitmask - 1) << e->shift_l;
1875 if (e->shift_l != e->shift_r) {
1876 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1877 return -EINVAL;
1878 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1879 mask |= (bitmask - 1) << e->shift_r;
1880 }
1881
1882 mutex_lock(&widget->codec->mutex);
1883 widget->value = val;
1884 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1885
1886 update.kcontrol = kcontrol;
1887 update.widget = widget;
1888 update.reg = e->reg;
1889 update.mask = mask;
1890 update.val = val;
1891 widget->dapm->update = &update;
1892
1893 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1894
1895 widget->dapm->update = NULL;
1896
1897 mutex_unlock(&widget->codec->mutex);
1898 return change;
1899 }
1900 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1901
1902 /**
1903 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1904 * @kcontrol: mixer control
1905 * @ucontrol: control element information
1906 *
1907 * Returns 0 for success.
1908 */
1909 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
1910 struct snd_ctl_elem_value *ucontrol)
1911 {
1912 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1913
1914 ucontrol->value.enumerated.item[0] = widget->value;
1915
1916 return 0;
1917 }
1918 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
1919
1920 /**
1921 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1922 * @kcontrol: mixer control
1923 * @ucontrol: control element information
1924 *
1925 * Returns 0 for success.
1926 */
1927 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
1928 struct snd_ctl_elem_value *ucontrol)
1929 {
1930 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1931 struct soc_enum *e =
1932 (struct soc_enum *)kcontrol->private_value;
1933 int change;
1934 int ret = 0;
1935
1936 if (ucontrol->value.enumerated.item[0] >= e->max)
1937 return -EINVAL;
1938
1939 mutex_lock(&widget->codec->mutex);
1940
1941 change = widget->value != ucontrol->value.enumerated.item[0];
1942 widget->value = ucontrol->value.enumerated.item[0];
1943 dapm_mux_update_power(widget, kcontrol, change, widget->value, e);
1944
1945 mutex_unlock(&widget->codec->mutex);
1946 return ret;
1947 }
1948 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
1949
1950 /**
1951 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1952 * callback
1953 * @kcontrol: mixer control
1954 * @ucontrol: control element information
1955 *
1956 * Callback to get the value of a dapm semi enumerated double mixer control.
1957 *
1958 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1959 * used for handling bitfield coded enumeration for example.
1960 *
1961 * Returns 0 for success.
1962 */
1963 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1964 struct snd_ctl_elem_value *ucontrol)
1965 {
1966 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1967 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1968 unsigned int reg_val, val, mux;
1969
1970 reg_val = snd_soc_read(widget->codec, e->reg);
1971 val = (reg_val >> e->shift_l) & e->mask;
1972 for (mux = 0; mux < e->max; mux++) {
1973 if (val == e->values[mux])
1974 break;
1975 }
1976 ucontrol->value.enumerated.item[0] = mux;
1977 if (e->shift_l != e->shift_r) {
1978 val = (reg_val >> e->shift_r) & e->mask;
1979 for (mux = 0; mux < e->max; mux++) {
1980 if (val == e->values[mux])
1981 break;
1982 }
1983 ucontrol->value.enumerated.item[1] = mux;
1984 }
1985
1986 return 0;
1987 }
1988 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1989
1990 /**
1991 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1992 * callback
1993 * @kcontrol: mixer control
1994 * @ucontrol: control element information
1995 *
1996 * Callback to set the value of a dapm semi enumerated double mixer control.
1997 *
1998 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1999 * used for handling bitfield coded enumeration for example.
2000 *
2001 * Returns 0 for success.
2002 */
2003 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2004 struct snd_ctl_elem_value *ucontrol)
2005 {
2006 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
2007 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2008 unsigned int val, mux, change;
2009 unsigned int mask;
2010 struct snd_soc_dapm_update update;
2011
2012 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2013 return -EINVAL;
2014 mux = ucontrol->value.enumerated.item[0];
2015 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2016 mask = e->mask << e->shift_l;
2017 if (e->shift_l != e->shift_r) {
2018 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2019 return -EINVAL;
2020 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2021 mask |= e->mask << e->shift_r;
2022 }
2023
2024 mutex_lock(&widget->codec->mutex);
2025 widget->value = val;
2026 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
2027
2028 update.kcontrol = kcontrol;
2029 update.widget = widget;
2030 update.reg = e->reg;
2031 update.mask = mask;
2032 update.val = val;
2033 widget->dapm->update = &update;
2034
2035 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2036
2037 widget->dapm->update = NULL;
2038
2039 mutex_unlock(&widget->codec->mutex);
2040 return change;
2041 }
2042 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2043
2044 /**
2045 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2046 *
2047 * @kcontrol: mixer control
2048 * @uinfo: control element information
2049 *
2050 * Callback to provide information about a pin switch control.
2051 */
2052 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2053 struct snd_ctl_elem_info *uinfo)
2054 {
2055 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2056 uinfo->count = 1;
2057 uinfo->value.integer.min = 0;
2058 uinfo->value.integer.max = 1;
2059
2060 return 0;
2061 }
2062 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2063
2064 /**
2065 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2066 *
2067 * @kcontrol: mixer control
2068 * @ucontrol: Value
2069 */
2070 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2071 struct snd_ctl_elem_value *ucontrol)
2072 {
2073 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2074 const char *pin = (const char *)kcontrol->private_value;
2075
2076 mutex_lock(&codec->mutex);
2077
2078 ucontrol->value.integer.value[0] =
2079 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2080
2081 mutex_unlock(&codec->mutex);
2082
2083 return 0;
2084 }
2085 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2086
2087 /**
2088 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2089 *
2090 * @kcontrol: mixer control
2091 * @ucontrol: Value
2092 */
2093 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2094 struct snd_ctl_elem_value *ucontrol)
2095 {
2096 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2097 const char *pin = (const char *)kcontrol->private_value;
2098
2099 mutex_lock(&codec->mutex);
2100
2101 if (ucontrol->value.integer.value[0])
2102 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2103 else
2104 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2105
2106 snd_soc_dapm_sync(&codec->dapm);
2107
2108 mutex_unlock(&codec->mutex);
2109
2110 return 0;
2111 }
2112 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2113
2114 /**
2115 * snd_soc_dapm_new_control - create new dapm control
2116 * @dapm: DAPM context
2117 * @widget: widget template
2118 *
2119 * Creates a new dapm control based upon the template.
2120 *
2121 * Returns 0 for success else error.
2122 */
2123 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2124 const struct snd_soc_dapm_widget *widget)
2125 {
2126 struct snd_soc_dapm_widget *w;
2127 size_t name_len;
2128
2129 if ((w = dapm_cnew_widget(widget)) == NULL)
2130 return -ENOMEM;
2131
2132 name_len = strlen(widget->name) + 1;
2133 if (dapm->codec->name_prefix)
2134 name_len += 1 + strlen(dapm->codec->name_prefix);
2135 w->name = kmalloc(name_len, GFP_KERNEL);
2136 if (w->name == NULL) {
2137 kfree(w);
2138 return -ENOMEM;
2139 }
2140 if (dapm->codec->name_prefix)
2141 snprintf(w->name, name_len, "%s %s",
2142 dapm->codec->name_prefix, widget->name);
2143 else
2144 snprintf(w->name, name_len, "%s", widget->name);
2145
2146 dapm->n_widgets++;
2147 w->dapm = dapm;
2148 w->codec = dapm->codec;
2149 INIT_LIST_HEAD(&w->sources);
2150 INIT_LIST_HEAD(&w->sinks);
2151 INIT_LIST_HEAD(&w->list);
2152 list_add(&w->list, &dapm->card->widgets);
2153
2154 /* machine layer set ups unconnected pins and insertions */
2155 w->connected = 1;
2156 return 0;
2157 }
2158 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2159
2160 /**
2161 * snd_soc_dapm_new_controls - create new dapm controls
2162 * @dapm: DAPM context
2163 * @widget: widget array
2164 * @num: number of widgets
2165 *
2166 * Creates new DAPM controls based upon the templates.
2167 *
2168 * Returns 0 for success else error.
2169 */
2170 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2171 const struct snd_soc_dapm_widget *widget,
2172 int num)
2173 {
2174 int i, ret;
2175
2176 for (i = 0; i < num; i++) {
2177 ret = snd_soc_dapm_new_control(dapm, widget);
2178 if (ret < 0) {
2179 dev_err(dapm->dev,
2180 "ASoC: Failed to create DAPM control %s: %d\n",
2181 widget->name, ret);
2182 return ret;
2183 }
2184 widget++;
2185 }
2186 return 0;
2187 }
2188 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2189
2190 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2191 const char *stream, int event)
2192 {
2193 struct snd_soc_dapm_widget *w;
2194
2195 list_for_each_entry(w, &dapm->card->widgets, list)
2196 {
2197 if (!w->sname || w->dapm != dapm)
2198 continue;
2199 dev_dbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2200 w->name, w->sname, stream, event);
2201 if (strstr(w->sname, stream)) {
2202 switch(event) {
2203 case SND_SOC_DAPM_STREAM_START:
2204 w->active = 1;
2205 break;
2206 case SND_SOC_DAPM_STREAM_STOP:
2207 w->active = 0;
2208 break;
2209 case SND_SOC_DAPM_STREAM_SUSPEND:
2210 case SND_SOC_DAPM_STREAM_RESUME:
2211 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2212 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2213 break;
2214 }
2215 }
2216 }
2217
2218 dapm_power_widgets(dapm, event);
2219 }
2220
2221 /**
2222 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2223 * @rtd: PCM runtime data
2224 * @stream: stream name
2225 * @event: stream event
2226 *
2227 * Sends a stream event to the dapm core. The core then makes any
2228 * necessary widget power changes.
2229 *
2230 * Returns 0 for success else error.
2231 */
2232 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2233 const char *stream, int event)
2234 {
2235 struct snd_soc_codec *codec = rtd->codec;
2236
2237 if (stream == NULL)
2238 return 0;
2239
2240 mutex_lock(&codec->mutex);
2241 soc_dapm_stream_event(&codec->dapm, stream, event);
2242 mutex_unlock(&codec->mutex);
2243 return 0;
2244 }
2245 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2246
2247 /**
2248 * snd_soc_dapm_enable_pin - enable pin.
2249 * @dapm: DAPM context
2250 * @pin: pin name
2251 *
2252 * Enables input/output pin and its parents or children widgets iff there is
2253 * a valid audio route and active audio stream.
2254 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2255 * do any widget power switching.
2256 */
2257 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2258 {
2259 return snd_soc_dapm_set_pin(dapm, pin, 1);
2260 }
2261 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2262
2263 /**
2264 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2265 * @dapm: DAPM context
2266 * @pin: pin name
2267 *
2268 * Enables input/output pin regardless of any other state. This is
2269 * intended for use with microphone bias supplies used in microphone
2270 * jack detection.
2271 *
2272 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2273 * do any widget power switching.
2274 */
2275 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2276 const char *pin)
2277 {
2278 struct snd_soc_dapm_widget *w;
2279
2280 list_for_each_entry(w, &dapm->card->widgets, list) {
2281 if (w->dapm != dapm)
2282 continue;
2283 if (!strcmp(w->name, pin)) {
2284 dev_dbg(w->dapm->dev,
2285 "dapm: force enable pin %s\n", pin);
2286 w->connected = 1;
2287 w->force = 1;
2288 return 0;
2289 }
2290 }
2291
2292 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2293 return -EINVAL;
2294 }
2295 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2296
2297 /**
2298 * snd_soc_dapm_disable_pin - disable pin.
2299 * @dapm: DAPM context
2300 * @pin: pin name
2301 *
2302 * Disables input/output pin and its parents or children widgets.
2303 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2304 * do any widget power switching.
2305 */
2306 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2307 const char *pin)
2308 {
2309 return snd_soc_dapm_set_pin(dapm, pin, 0);
2310 }
2311 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2312
2313 /**
2314 * snd_soc_dapm_nc_pin - permanently disable pin.
2315 * @dapm: DAPM context
2316 * @pin: pin name
2317 *
2318 * Marks the specified pin as being not connected, disabling it along
2319 * any parent or child widgets. At present this is identical to
2320 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2321 * additional things such as disabling controls which only affect
2322 * paths through the pin.
2323 *
2324 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2325 * do any widget power switching.
2326 */
2327 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2328 {
2329 return snd_soc_dapm_set_pin(dapm, pin, 0);
2330 }
2331 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2332
2333 /**
2334 * snd_soc_dapm_get_pin_status - get audio pin status
2335 * @dapm: DAPM context
2336 * @pin: audio signal pin endpoint (or start point)
2337 *
2338 * Get audio pin status - connected or disconnected.
2339 *
2340 * Returns 1 for connected otherwise 0.
2341 */
2342 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2343 const char *pin)
2344 {
2345 struct snd_soc_dapm_widget *w;
2346
2347 list_for_each_entry(w, &dapm->card->widgets, list) {
2348 if (w->dapm != dapm)
2349 continue;
2350 if (!strcmp(w->name, pin))
2351 return w->connected;
2352 }
2353
2354 return 0;
2355 }
2356 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2357
2358 /**
2359 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2360 * @dapm: DAPM context
2361 * @pin: audio signal pin endpoint (or start point)
2362 *
2363 * Mark the given endpoint or pin as ignoring suspend. When the
2364 * system is disabled a path between two endpoints flagged as ignoring
2365 * suspend will not be disabled. The path must already be enabled via
2366 * normal means at suspend time, it will not be turned on if it was not
2367 * already enabled.
2368 */
2369 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2370 const char *pin)
2371 {
2372 struct snd_soc_dapm_widget *w;
2373
2374 list_for_each_entry(w, &dapm->card->widgets, list) {
2375 if (w->dapm != dapm)
2376 continue;
2377 if (!strcmp(w->name, pin)) {
2378 w->ignore_suspend = 1;
2379 return 0;
2380 }
2381 }
2382
2383 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2384 return -EINVAL;
2385 }
2386 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2387
2388 /**
2389 * snd_soc_dapm_free - free dapm resources
2390 * @card: SoC device
2391 *
2392 * Free all dapm widgets and resources.
2393 */
2394 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2395 {
2396 snd_soc_dapm_sys_remove(dapm->dev);
2397 dapm_free_widgets(dapm);
2398 list_del(&dapm->list);
2399 }
2400 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2401
2402 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2403 {
2404 struct snd_soc_dapm_widget *w;
2405 LIST_HEAD(down_list);
2406 int powerdown = 0;
2407
2408 list_for_each_entry(w, &dapm->card->widgets, list) {
2409 if (w->dapm != dapm)
2410 continue;
2411 if (w->power) {
2412 dapm_seq_insert(w, &down_list, false);
2413 w->power = 0;
2414 powerdown = 1;
2415 }
2416 }
2417
2418 /* If there were no widgets to power down we're already in
2419 * standby.
2420 */
2421 if (powerdown) {
2422 snd_soc_dapm_set_bias_level(NULL, dapm, SND_SOC_BIAS_PREPARE);
2423 dapm_seq_run(dapm, &down_list, 0, false);
2424 snd_soc_dapm_set_bias_level(NULL, dapm, SND_SOC_BIAS_STANDBY);
2425 }
2426 }
2427
2428 /*
2429 * snd_soc_dapm_shutdown - callback for system shutdown
2430 */
2431 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2432 {
2433 struct snd_soc_codec *codec;
2434
2435 list_for_each_entry(codec, &card->codec_dev_list, list) {
2436 soc_dapm_shutdown_codec(&codec->dapm);
2437 snd_soc_dapm_set_bias_level(card, &codec->dapm, SND_SOC_BIAS_OFF);
2438 }
2439 }
2440
2441 /* Module information */
2442 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2443 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2444 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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