?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
memcg: optimize per-cpu statistics
[linux-2.6/linux-loongson.git] / sound / soc / soc-dapm.c
blob7351db9606e48f3d11870671a4b9e71c37081e50
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 * DAC's/ADC's.
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 <sound/core.h>
42 #include <sound/pcm.h>
43 #include <sound/pcm_params.h>
44 #include <sound/soc-dapm.h>
45 #include <sound/initval.h>
46
47 /* debug */
48 #ifdef DEBUG
49 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
50 #else
51 #define dump_dapm(codec, action)
52 #endif
53
54 /* dapm power sequences - make this per codec in the future */
55 static int dapm_up_seq[] = {
56 snd_soc_dapm_pre, snd_soc_dapm_micbias, snd_soc_dapm_mic,
57 snd_soc_dapm_mux, snd_soc_dapm_dac, snd_soc_dapm_mixer, snd_soc_dapm_pga,
58 snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk, snd_soc_dapm_post
59 };
60 static int dapm_down_seq[] = {
61 snd_soc_dapm_pre, snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk,
62 snd_soc_dapm_pga, snd_soc_dapm_mixer, snd_soc_dapm_dac, snd_soc_dapm_mic,
63 snd_soc_dapm_micbias, snd_soc_dapm_mux, snd_soc_dapm_post
64 };
65
66 static int dapm_status = 1;
67 module_param(dapm_status, int, 0);
68 MODULE_PARM_DESC(dapm_status, "enable DPM sysfs entries");
69
70 static struct dentry *asoc_debugfs;
71
72 static u32 pop_time;
73
74 static void pop_wait(void)
75 {
76 if (pop_time)
77 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
78 }
79
80 static void pop_dbg(const char *fmt, ...)
81 {
82 va_list args;
83
84 va_start(args, fmt);
85
86 if (pop_time) {
87 vprintk(fmt, args);
88 pop_wait();
89 }
90
91 va_end(args);
92 }
93
94 /* create a new dapm widget */
95 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
96 const struct snd_soc_dapm_widget *_widget)
97 {
98 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
99 }
100
101 /* set up initial codec paths */
102 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
103 struct snd_soc_dapm_path *p, int i)
104 {
105 switch (w->id) {
106 case snd_soc_dapm_switch:
107 case snd_soc_dapm_mixer: {
108 int val;
109 struct soc_mixer_control *mc = (struct soc_mixer_control *)
110 w->kcontrols[i].private_value;
111 unsigned int reg = mc->reg;
112 unsigned int shift = mc->shift;
113 int max = mc->max;
114 unsigned int mask = (1 << fls(max)) - 1;
115 unsigned int invert = mc->invert;
116
117 val = snd_soc_read(w->codec, reg);
118 val = (val >> shift) & mask;
119
120 if ((invert && !val) || (!invert && val))
121 p->connect = 1;
122 else
123 p->connect = 0;
124 }
125 break;
126 case snd_soc_dapm_mux: {
127 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
128 int val, item, bitmask;
129
130 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
131 ;
132 val = snd_soc_read(w->codec, e->reg);
133 item = (val >> e->shift_l) & (bitmask - 1);
134
135 p->connect = 0;
136 for (i = 0; i < e->max; i++) {
137 if (!(strcmp(p->name, e->texts[i])) && item == i)
138 p->connect = 1;
139 }
140 }
141 break;
142 /* does not effect routing - always connected */
143 case snd_soc_dapm_pga:
144 case snd_soc_dapm_output:
145 case snd_soc_dapm_adc:
146 case snd_soc_dapm_input:
147 case snd_soc_dapm_dac:
148 case snd_soc_dapm_micbias:
149 case snd_soc_dapm_vmid:
150 p->connect = 1;
151 break;
152 /* does effect routing - dynamically connected */
153 case snd_soc_dapm_hp:
154 case snd_soc_dapm_mic:
155 case snd_soc_dapm_spk:
156 case snd_soc_dapm_line:
157 case snd_soc_dapm_pre:
158 case snd_soc_dapm_post:
159 p->connect = 0;
160 break;
161 }
162 }
163
164 /* connect mux widget to it's interconnecting audio paths */
165 static int dapm_connect_mux(struct snd_soc_codec *codec,
166 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
167 struct snd_soc_dapm_path *path, const char *control_name,
168 const struct snd_kcontrol_new *kcontrol)
169 {
170 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
171 int i;
172
173 for (i = 0; i < e->max; i++) {
174 if (!(strcmp(control_name, e->texts[i]))) {
175 list_add(&path->list, &codec->dapm_paths);
176 list_add(&path->list_sink, &dest->sources);
177 list_add(&path->list_source, &src->sinks);
178 path->name = (char*)e->texts[i];
179 dapm_set_path_status(dest, path, 0);
180 return 0;
181 }
182 }
183
184 return -ENODEV;
185 }
186
187 /* connect mixer widget to it's interconnecting audio paths */
188 static int dapm_connect_mixer(struct snd_soc_codec *codec,
189 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
190 struct snd_soc_dapm_path *path, const char *control_name)
191 {
192 int i;
193
194 /* search for mixer kcontrol */
195 for (i = 0; i < dest->num_kcontrols; i++) {
196 if (!strcmp(control_name, dest->kcontrols[i].name)) {
197 list_add(&path->list, &codec->dapm_paths);
198 list_add(&path->list_sink, &dest->sources);
199 list_add(&path->list_source, &src->sinks);
200 path->name = dest->kcontrols[i].name;
201 dapm_set_path_status(dest, path, i);
202 return 0;
203 }
204 }
205 return -ENODEV;
206 }
207
208 /* update dapm codec register bits */
209 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
210 {
211 int change, power;
212 unsigned short old, new;
213 struct snd_soc_codec *codec = widget->codec;
214
215 /* check for valid widgets */
216 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
217 widget->id == snd_soc_dapm_output ||
218 widget->id == snd_soc_dapm_hp ||
219 widget->id == snd_soc_dapm_mic ||
220 widget->id == snd_soc_dapm_line ||
221 widget->id == snd_soc_dapm_spk)
222 return 0;
223
224 power = widget->power;
225 if (widget->invert)
226 power = (power ? 0:1);
227
228 old = snd_soc_read(codec, widget->reg);
229 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
230
231 change = old != new;
232 if (change) {
233 pop_dbg("pop test %s : %s in %d ms\n", widget->name,
234 widget->power ? "on" : "off", pop_time);
235 snd_soc_write(codec, widget->reg, new);
236 pop_wait();
237 }
238 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
239 old, new, change);
240 return change;
241 }
242
243 /* ramps the volume up or down to minimise pops before or after a
244 * DAPM power event */
245 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
246 {
247 const struct snd_kcontrol_new *k = widget->kcontrols;
248
249 if (widget->muted && !power)
250 return 0;
251 if (!widget->muted && power)
252 return 0;
253
254 if (widget->num_kcontrols && k) {
255 struct soc_mixer_control *mc =
256 (struct soc_mixer_control *)k->private_value;
257 unsigned int reg = mc->reg;
258 unsigned int shift = mc->shift;
259 int max = mc->max;
260 unsigned int mask = (1 << fls(max)) - 1;
261 unsigned int invert = mc->invert;
262
263 if (power) {
264 int i;
265 /* power up has happended, increase volume to last level */
266 if (invert) {
267 for (i = max; i > widget->saved_value; i--)
268 snd_soc_update_bits(widget->codec, reg, mask, i);
269 } else {
270 for (i = 0; i < widget->saved_value; i++)
271 snd_soc_update_bits(widget->codec, reg, mask, i);
272 }
273 widget->muted = 0;
274 } else {
275 /* power down is about to occur, decrease volume to mute */
276 int val = snd_soc_read(widget->codec, reg);
277 int i = widget->saved_value = (val >> shift) & mask;
278 if (invert) {
279 for (; i < mask; i++)
280 snd_soc_update_bits(widget->codec, reg, mask, i);
281 } else {
282 for (; i > 0; i--)
283 snd_soc_update_bits(widget->codec, reg, mask, i);
284 }
285 widget->muted = 1;
286 }
287 }
288 return 0;
289 }
290
291 /* create new dapm mixer control */
292 static int dapm_new_mixer(struct snd_soc_codec *codec,
293 struct snd_soc_dapm_widget *w)
294 {
295 int i, ret = 0;
296 char name[32];
297 struct snd_soc_dapm_path *path;
298
299 /* add kcontrol */
300 for (i = 0; i < w->num_kcontrols; i++) {
301
302 /* match name */
303 list_for_each_entry(path, &w->sources, list_sink) {
304
305 /* mixer/mux paths name must match control name */
306 if (path->name != (char*)w->kcontrols[i].name)
307 continue;
308
309 /* add dapm control with long name */
310 snprintf(name, 32, "%s %s", w->name, w->kcontrols[i].name);
311 path->long_name = kstrdup (name, GFP_KERNEL);
312 if (path->long_name == NULL)
313 return -ENOMEM;
314
315 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
316 path->long_name);
317 ret = snd_ctl_add(codec->card, path->kcontrol);
318 if (ret < 0) {
319 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s\n",
320 path->long_name);
321 kfree(path->long_name);
322 path->long_name = NULL;
323 return ret;
324 }
325 }
326 }
327 return ret;
328 }
329
330 /* create new dapm mux control */
331 static int dapm_new_mux(struct snd_soc_codec *codec,
332 struct snd_soc_dapm_widget *w)
333 {
334 struct snd_soc_dapm_path *path = NULL;
335 struct snd_kcontrol *kcontrol;
336 int ret = 0;
337
338 if (!w->num_kcontrols) {
339 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
340 return -EINVAL;
341 }
342
343 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
344 ret = snd_ctl_add(codec->card, kcontrol);
345 if (ret < 0)
346 goto err;
347
348 list_for_each_entry(path, &w->sources, list_sink)
349 path->kcontrol = kcontrol;
350
351 return ret;
352
353 err:
354 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
355 return ret;
356 }
357
358 /* create new dapm volume control */
359 static int dapm_new_pga(struct snd_soc_codec *codec,
360 struct snd_soc_dapm_widget *w)
361 {
362 struct snd_kcontrol *kcontrol;
363 int ret = 0;
364
365 if (!w->num_kcontrols)
366 return -EINVAL;
367
368 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
369 ret = snd_ctl_add(codec->card, kcontrol);
370 if (ret < 0) {
371 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
372 return ret;
373 }
374
375 return ret;
376 }
377
378 /* reset 'walked' bit for each dapm path */
379 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
380 {
381 struct snd_soc_dapm_path *p;
382
383 list_for_each_entry(p, &codec->dapm_paths, list)
384 p->walked = 0;
385 }
386
387 /*
388 * Recursively check for a completed path to an active or physically connected
389 * output widget. Returns number of complete paths.
390 */
391 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
392 {
393 struct snd_soc_dapm_path *path;
394 int con = 0;
395
396 if (widget->id == snd_soc_dapm_adc && widget->active)
397 return 1;
398
399 if (widget->connected) {
400 /* connected pin ? */
401 if (widget->id == snd_soc_dapm_output && !widget->ext)
402 return 1;
403
404 /* connected jack or spk ? */
405 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
406 widget->id == snd_soc_dapm_line)
407 return 1;
408 }
409
410 list_for_each_entry(path, &widget->sinks, list_source) {
411 if (path->walked)
412 continue;
413
414 if (path->sink && path->connect) {
415 path->walked = 1;
416 con += is_connected_output_ep(path->sink);
417 }
418 }
419
420 return con;
421 }
422
423 /*
424 * Recursively check for a completed path to an active or physically connected
425 * input widget. Returns number of complete paths.
426 */
427 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
428 {
429 struct snd_soc_dapm_path *path;
430 int con = 0;
431
432 /* active stream ? */
433 if (widget->id == snd_soc_dapm_dac && widget->active)
434 return 1;
435
436 if (widget->connected) {
437 /* connected pin ? */
438 if (widget->id == snd_soc_dapm_input && !widget->ext)
439 return 1;
440
441 /* connected VMID/Bias for lower pops */
442 if (widget->id == snd_soc_dapm_vmid)
443 return 1;
444
445 /* connected jack ? */
446 if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line)
447 return 1;
448 }
449
450 list_for_each_entry(path, &widget->sources, list_sink) {
451 if (path->walked)
452 continue;
453
454 if (path->source && path->connect) {
455 path->walked = 1;
456 con += is_connected_input_ep(path->source);
457 }
458 }
459
460 return con;
461 }
462
463 /*
464 * Handler for generic register modifier widget.
465 */
466 int dapm_reg_event(struct snd_soc_dapm_widget *w,
467 struct snd_kcontrol *kcontrol, int event)
468 {
469 unsigned int val;
470
471 if (SND_SOC_DAPM_EVENT_ON(event))
472 val = w->on_val;
473 else
474 val = w->off_val;
475
476 snd_soc_update_bits(w->codec, -(w->reg + 1),
477 w->mask << w->shift, val << w->shift);
478
479 return 0;
480 }
481 EXPORT_SYMBOL_GPL(dapm_reg_event);
482
483 /*
484 * Scan each dapm widget for complete audio path.
485 * A complete path is a route that has valid endpoints i.e.:-
486 *
487 * o DAC to output pin.
488 * o Input Pin to ADC.
489 * o Input pin to Output pin (bypass, sidetone)
490 * o DAC to ADC (loopback).
491 */
492 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
493 {
494 struct snd_soc_dapm_widget *w;
495 int in, out, i, c = 1, *seq = NULL, ret = 0, power_change, power;
496
497 /* do we have a sequenced stream event */
498 if (event == SND_SOC_DAPM_STREAM_START) {
499 c = ARRAY_SIZE(dapm_up_seq);
500 seq = dapm_up_seq;
501 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
502 c = ARRAY_SIZE(dapm_down_seq);
503 seq = dapm_down_seq;
504 }
505
506 for(i = 0; i < c; i++) {
507 list_for_each_entry(w, &codec->dapm_widgets, list) {
508
509 /* is widget in stream order */
510 if (seq && seq[i] && w->id != seq[i])
511 continue;
512
513 /* vmid - no action */
514 if (w->id == snd_soc_dapm_vmid)
515 continue;
516
517 /* active ADC */
518 if (w->id == snd_soc_dapm_adc && w->active) {
519 in = is_connected_input_ep(w);
520 dapm_clear_walk(w->codec);
521 w->power = (in != 0) ? 1 : 0;
522 dapm_update_bits(w);
523 continue;
524 }
525
526 /* active DAC */
527 if (w->id == snd_soc_dapm_dac && w->active) {
528 out = is_connected_output_ep(w);
529 dapm_clear_walk(w->codec);
530 w->power = (out != 0) ? 1 : 0;
531 dapm_update_bits(w);
532 continue;
533 }
534
535 /* pre and post event widgets */
536 if (w->id == snd_soc_dapm_pre) {
537 if (!w->event)
538 continue;
539
540 if (event == SND_SOC_DAPM_STREAM_START) {
541 ret = w->event(w,
542 NULL, SND_SOC_DAPM_PRE_PMU);
543 if (ret < 0)
544 return ret;
545 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
546 ret = w->event(w,
547 NULL, SND_SOC_DAPM_PRE_PMD);
548 if (ret < 0)
549 return ret;
550 }
551 continue;
552 }
553 if (w->id == snd_soc_dapm_post) {
554 if (!w->event)
555 continue;
556
557 if (event == SND_SOC_DAPM_STREAM_START) {
558 ret = w->event(w,
559 NULL, SND_SOC_DAPM_POST_PMU);
560 if (ret < 0)
561 return ret;
562 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
563 ret = w->event(w,
564 NULL, SND_SOC_DAPM_POST_PMD);
565 if (ret < 0)
566 return ret;
567 }
568 continue;
569 }
570
571 /* all other widgets */
572 in = is_connected_input_ep(w);
573 dapm_clear_walk(w->codec);
574 out = is_connected_output_ep(w);
575 dapm_clear_walk(w->codec);
576 power = (out != 0 && in != 0) ? 1 : 0;
577 power_change = (w->power == power) ? 0: 1;
578 w->power = power;
579
580 if (!power_change)
581 continue;
582
583 /* call any power change event handlers */
584 if (w->event)
585 pr_debug("power %s event for %s flags %x\n",
586 w->power ? "on" : "off",
587 w->name, w->event_flags);
588
589 /* power up pre event */
590 if (power && w->event &&
591 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
592 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
593 if (ret < 0)
594 return ret;
595 }
596
597 /* power down pre event */
598 if (!power && w->event &&
599 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
600 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
601 if (ret < 0)
602 return ret;
603 }
604
605 /* Lower PGA volume to reduce pops */
606 if (w->id == snd_soc_dapm_pga && !power)
607 dapm_set_pga(w, power);
608
609 dapm_update_bits(w);
610
611 /* Raise PGA volume to reduce pops */
612 if (w->id == snd_soc_dapm_pga && power)
613 dapm_set_pga(w, power);
614
615 /* power up post event */
616 if (power && w->event &&
617 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
618 ret = w->event(w,
619 NULL, SND_SOC_DAPM_POST_PMU);
620 if (ret < 0)
621 return ret;
622 }
623
624 /* power down post event */
625 if (!power && w->event &&
626 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
627 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
628 if (ret < 0)
629 return ret;
630 }
631 }
632 }
633
634 return ret;
635 }
636
637 #ifdef DEBUG
638 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
639 {
640 struct snd_soc_dapm_widget *w;
641 struct snd_soc_dapm_path *p = NULL;
642 int in, out;
643
644 printk("DAPM %s %s\n", codec->name, action);
645
646 list_for_each_entry(w, &codec->dapm_widgets, list) {
647
648 /* only display widgets that effect routing */
649 switch (w->id) {
650 case snd_soc_dapm_pre:
651 case snd_soc_dapm_post:
652 case snd_soc_dapm_vmid:
653 continue;
654 case snd_soc_dapm_mux:
655 case snd_soc_dapm_output:
656 case snd_soc_dapm_input:
657 case snd_soc_dapm_switch:
658 case snd_soc_dapm_hp:
659 case snd_soc_dapm_mic:
660 case snd_soc_dapm_spk:
661 case snd_soc_dapm_line:
662 case snd_soc_dapm_micbias:
663 case snd_soc_dapm_dac:
664 case snd_soc_dapm_adc:
665 case snd_soc_dapm_pga:
666 case snd_soc_dapm_mixer:
667 if (w->name) {
668 in = is_connected_input_ep(w);
669 dapm_clear_walk(w->codec);
670 out = is_connected_output_ep(w);
671 dapm_clear_walk(w->codec);
672 printk("%s: %s in %d out %d\n", w->name,
673 w->power ? "On":"Off",in, out);
674
675 list_for_each_entry(p, &w->sources, list_sink) {
676 if (p->connect)
677 printk(" in %s %s\n", p->name ? p->name : "static",
678 p->source->name);
679 }
680 list_for_each_entry(p, &w->sinks, list_source) {
681 if (p->connect)
682 printk(" out %s %s\n", p->name ? p->name : "static",
683 p->sink->name);
684 }
685 }
686 break;
687 }
688 }
689 }
690 #endif
691
692 /* test and update the power status of a mux widget */
693 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
694 struct snd_kcontrol *kcontrol, int mask,
695 int mux, int val, struct soc_enum *e)
696 {
697 struct snd_soc_dapm_path *path;
698 int found = 0;
699
700 if (widget->id != snd_soc_dapm_mux)
701 return -ENODEV;
702
703 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
704 return 0;
705
706 /* find dapm widget path assoc with kcontrol */
707 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
708 if (path->kcontrol != kcontrol)
709 continue;
710
711 if (!path->name || !e->texts[mux])
712 continue;
713
714 found = 1;
715 /* we now need to match the string in the enum to the path */
716 if (!(strcmp(path->name, e->texts[mux])))
717 path->connect = 1; /* new connection */
718 else
719 path->connect = 0; /* old connection must be powered down */
720 }
721
722 if (found) {
723 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
724 dump_dapm(widget->codec, "mux power update");
725 }
726
727 return 0;
728 }
729
730 /* test and update the power status of a mixer or switch widget */
731 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
732 struct snd_kcontrol *kcontrol, int reg,
733 int val_mask, int val, int invert)
734 {
735 struct snd_soc_dapm_path *path;
736 int found = 0;
737
738 if (widget->id != snd_soc_dapm_mixer &&
739 widget->id != snd_soc_dapm_switch)
740 return -ENODEV;
741
742 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
743 return 0;
744
745 /* find dapm widget path assoc with kcontrol */
746 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
747 if (path->kcontrol != kcontrol)
748 continue;
749
750 /* found, now check type */
751 found = 1;
752 if (val)
753 /* new connection */
754 path->connect = invert ? 0:1;
755 else
756 /* old connection must be powered down */
757 path->connect = invert ? 1:0;
758 break;
759 }
760
761 if (found) {
762 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
763 dump_dapm(widget->codec, "mixer power update");
764 }
765
766 return 0;
767 }
768
769 /* show dapm widget status in sys fs */
770 static ssize_t dapm_widget_show(struct device *dev,
771 struct device_attribute *attr, char *buf)
772 {
773 struct snd_soc_device *devdata = dev_get_drvdata(dev);
774 struct snd_soc_codec *codec = devdata->codec;
775 struct snd_soc_dapm_widget *w;
776 int count = 0;
777 char *state = "not set";
778
779 list_for_each_entry(w, &codec->dapm_widgets, list) {
780
781 /* only display widgets that burnm power */
782 switch (w->id) {
783 case snd_soc_dapm_hp:
784 case snd_soc_dapm_mic:
785 case snd_soc_dapm_spk:
786 case snd_soc_dapm_line:
787 case snd_soc_dapm_micbias:
788 case snd_soc_dapm_dac:
789 case snd_soc_dapm_adc:
790 case snd_soc_dapm_pga:
791 case snd_soc_dapm_mixer:
792 if (w->name)
793 count += sprintf(buf + count, "%s: %s\n",
794 w->name, w->power ? "On":"Off");
795 break;
796 default:
797 break;
798 }
799 }
800
801 switch (codec->bias_level) {
802 case SND_SOC_BIAS_ON:
803 state = "On";
804 break;
805 case SND_SOC_BIAS_PREPARE:
806 state = "Prepare";
807 break;
808 case SND_SOC_BIAS_STANDBY:
809 state = "Standby";
810 break;
811 case SND_SOC_BIAS_OFF:
812 state = "Off";
813 break;
814 }
815 count += sprintf(buf + count, "PM State: %s\n", state);
816
817 return count;
818 }
819
820 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
821
822 int snd_soc_dapm_sys_add(struct device *dev)
823 {
824 int ret = 0;
825
826 if (!dapm_status)
827 return 0;
828
829 ret = device_create_file(dev, &dev_attr_dapm_widget);
830 if (ret != 0)
831 return ret;
832
833 asoc_debugfs = debugfs_create_dir("asoc", NULL);
834 if (!IS_ERR(asoc_debugfs) && asoc_debugfs)
835 debugfs_create_u32("dapm_pop_time", 0744, asoc_debugfs,
836 &pop_time);
837 else
838 asoc_debugfs = NULL;
839
840 return 0;
841 }
842
843 static void snd_soc_dapm_sys_remove(struct device *dev)
844 {
845 if (dapm_status) {
846 device_remove_file(dev, &dev_attr_dapm_widget);
847 }
848
849 if (asoc_debugfs)
850 debugfs_remove_recursive(asoc_debugfs);
851 }
852
853 /* free all dapm widgets and resources */
854 static void dapm_free_widgets(struct snd_soc_codec *codec)
855 {
856 struct snd_soc_dapm_widget *w, *next_w;
857 struct snd_soc_dapm_path *p, *next_p;
858
859 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
860 list_del(&w->list);
861 kfree(w);
862 }
863
864 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
865 list_del(&p->list);
866 kfree(p->long_name);
867 kfree(p);
868 }
869 }
870
871 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
872 char *pin, int status)
873 {
874 struct snd_soc_dapm_widget *w;
875
876 list_for_each_entry(w, &codec->dapm_widgets, list) {
877 if (!strcmp(w->name, pin)) {
878 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
879 w->connected = status;
880 return 0;
881 }
882 }
883
884 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
885 return -EINVAL;
886 }
887
888 /**
889 * snd_soc_dapm_sync - scan and power dapm paths
890 * @codec: audio codec
891 *
892 * Walks all dapm audio paths and powers widgets according to their
893 * stream or path usage.
894 *
895 * Returns 0 for success.
896 */
897 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
898 {
899 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
900 dump_dapm(codec, "sync");
901 return ret;
902 }
903 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
904
905 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
906 const char *sink, const char *control, const char *source)
907 {
908 struct snd_soc_dapm_path *path;
909 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
910 int ret = 0;
911
912 /* find src and dest widgets */
913 list_for_each_entry(w, &codec->dapm_widgets, list) {
914
915 if (!wsink && !(strcmp(w->name, sink))) {
916 wsink = w;
917 continue;
918 }
919 if (!wsource && !(strcmp(w->name, source))) {
920 wsource = w;
921 }
922 }
923
924 if (wsource == NULL || wsink == NULL)
925 return -ENODEV;
926
927 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
928 if (!path)
929 return -ENOMEM;
930
931 path->source = wsource;
932 path->sink = wsink;
933 INIT_LIST_HEAD(&path->list);
934 INIT_LIST_HEAD(&path->list_source);
935 INIT_LIST_HEAD(&path->list_sink);
936
937 /* check for external widgets */
938 if (wsink->id == snd_soc_dapm_input) {
939 if (wsource->id == snd_soc_dapm_micbias ||
940 wsource->id == snd_soc_dapm_mic ||
941 wsink->id == snd_soc_dapm_line ||
942 wsink->id == snd_soc_dapm_output)
943 wsink->ext = 1;
944 }
945 if (wsource->id == snd_soc_dapm_output) {
946 if (wsink->id == snd_soc_dapm_spk ||
947 wsink->id == snd_soc_dapm_hp ||
948 wsink->id == snd_soc_dapm_line ||
949 wsink->id == snd_soc_dapm_input)
950 wsource->ext = 1;
951 }
952
953 /* connect static paths */
954 if (control == NULL) {
955 list_add(&path->list, &codec->dapm_paths);
956 list_add(&path->list_sink, &wsink->sources);
957 list_add(&path->list_source, &wsource->sinks);
958 path->connect = 1;
959 return 0;
960 }
961
962 /* connect dynamic paths */
963 switch(wsink->id) {
964 case snd_soc_dapm_adc:
965 case snd_soc_dapm_dac:
966 case snd_soc_dapm_pga:
967 case snd_soc_dapm_input:
968 case snd_soc_dapm_output:
969 case snd_soc_dapm_micbias:
970 case snd_soc_dapm_vmid:
971 case snd_soc_dapm_pre:
972 case snd_soc_dapm_post:
973 list_add(&path->list, &codec->dapm_paths);
974 list_add(&path->list_sink, &wsink->sources);
975 list_add(&path->list_source, &wsource->sinks);
976 path->connect = 1;
977 return 0;
978 case snd_soc_dapm_mux:
979 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
980 &wsink->kcontrols[0]);
981 if (ret != 0)
982 goto err;
983 break;
984 case snd_soc_dapm_switch:
985 case snd_soc_dapm_mixer:
986 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
987 if (ret != 0)
988 goto err;
989 break;
990 case snd_soc_dapm_hp:
991 case snd_soc_dapm_mic:
992 case snd_soc_dapm_line:
993 case snd_soc_dapm_spk:
994 list_add(&path->list, &codec->dapm_paths);
995 list_add(&path->list_sink, &wsink->sources);
996 list_add(&path->list_source, &wsource->sinks);
997 path->connect = 0;
998 return 0;
999 }
1000 return 0;
1001
1002 err:
1003 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1004 control, sink);
1005 kfree(path);
1006 return ret;
1007 }
1008
1009 /**
1010 * snd_soc_dapm_connect_input - connect dapm widgets
1011 * @codec: audio codec
1012 * @sink: name of target widget
1013 * @control: mixer control name
1014 * @source: name of source name
1015 *
1016 * Connects 2 dapm widgets together via a named audio path. The sink is
1017 * the widget receiving the audio signal, whilst the source is the sender
1018 * of the audio signal.
1019 *
1020 * This function has been deprecated in favour of snd_soc_dapm_add_routes().
1021 *
1022 * Returns 0 for success else error.
1023 */
1024 int snd_soc_dapm_connect_input(struct snd_soc_codec *codec, const char *sink,
1025 const char *control, const char *source)
1026 {
1027 return snd_soc_dapm_add_route(codec, sink, control, source);
1028 }
1029 EXPORT_SYMBOL_GPL(snd_soc_dapm_connect_input);
1030
1031 /**
1032 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1033 * @codec: codec
1034 * @route: audio routes
1035 * @num: number of routes
1036 *
1037 * Connects 2 dapm widgets together via a named audio path. The sink is
1038 * the widget receiving the audio signal, whilst the source is the sender
1039 * of the audio signal.
1040 *
1041 * Returns 0 for success else error. On error all resources can be freed
1042 * with a call to snd_soc_card_free().
1043 */
1044 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1045 const struct snd_soc_dapm_route *route, int num)
1046 {
1047 int i, ret;
1048
1049 for (i = 0; i < num; i++) {
1050 ret = snd_soc_dapm_add_route(codec, route->sink,
1051 route->control, route->source);
1052 if (ret < 0) {
1053 printk(KERN_ERR "Failed to add route %s->%s\n",
1054 route->source,
1055 route->sink);
1056 return ret;
1057 }
1058 route++;
1059 }
1060
1061 return 0;
1062 }
1063 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1064
1065 /**
1066 * snd_soc_dapm_new_widgets - add new dapm widgets
1067 * @codec: audio codec
1068 *
1069 * Checks the codec for any new dapm widgets and creates them if found.
1070 *
1071 * Returns 0 for success.
1072 */
1073 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1074 {
1075 struct snd_soc_dapm_widget *w;
1076
1077 list_for_each_entry(w, &codec->dapm_widgets, list)
1078 {
1079 if (w->new)
1080 continue;
1081
1082 switch(w->id) {
1083 case snd_soc_dapm_switch:
1084 case snd_soc_dapm_mixer:
1085 dapm_new_mixer(codec, w);
1086 break;
1087 case snd_soc_dapm_mux:
1088 dapm_new_mux(codec, w);
1089 break;
1090 case snd_soc_dapm_adc:
1091 case snd_soc_dapm_dac:
1092 case snd_soc_dapm_pga:
1093 dapm_new_pga(codec, w);
1094 break;
1095 case snd_soc_dapm_input:
1096 case snd_soc_dapm_output:
1097 case snd_soc_dapm_micbias:
1098 case snd_soc_dapm_spk:
1099 case snd_soc_dapm_hp:
1100 case snd_soc_dapm_mic:
1101 case snd_soc_dapm_line:
1102 case snd_soc_dapm_vmid:
1103 case snd_soc_dapm_pre:
1104 case snd_soc_dapm_post:
1105 break;
1106 }
1107 w->new = 1;
1108 }
1109
1110 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1111 return 0;
1112 }
1113 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1114
1115 /**
1116 * snd_soc_dapm_get_volsw - dapm mixer get callback
1117 * @kcontrol: mixer control
1118 * @uinfo: control element information
1119 *
1120 * Callback to get the value of a dapm mixer control.
1121 *
1122 * Returns 0 for success.
1123 */
1124 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1125 struct snd_ctl_elem_value *ucontrol)
1126 {
1127 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1128 struct soc_mixer_control *mc =
1129 (struct soc_mixer_control *)kcontrol->private_value;
1130 unsigned int reg = mc->reg;
1131 unsigned int shift = mc->shift;
1132 unsigned int rshift = mc->rshift;
1133 int max = mc->max;
1134 unsigned int invert = mc->invert;
1135 unsigned int mask = (1 << fls(max)) - 1;
1136
1137 /* return the saved value if we are powered down */
1138 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1139 ucontrol->value.integer.value[0] = widget->saved_value;
1140 return 0;
1141 }
1142
1143 ucontrol->value.integer.value[0] =
1144 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1145 if (shift != rshift)
1146 ucontrol->value.integer.value[1] =
1147 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1148 if (invert) {
1149 ucontrol->value.integer.value[0] =
1150 max - ucontrol->value.integer.value[0];
1151 if (shift != rshift)
1152 ucontrol->value.integer.value[1] =
1153 max - ucontrol->value.integer.value[1];
1154 }
1155
1156 return 0;
1157 }
1158 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1159
1160 /**
1161 * snd_soc_dapm_put_volsw - dapm mixer set callback
1162 * @kcontrol: mixer control
1163 * @uinfo: control element information
1164 *
1165 * Callback to set the value of a dapm mixer control.
1166 *
1167 * Returns 0 for success.
1168 */
1169 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1170 struct snd_ctl_elem_value *ucontrol)
1171 {
1172 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1173 struct soc_mixer_control *mc =
1174 (struct soc_mixer_control *)kcontrol->private_value;
1175 unsigned int reg = mc->reg;
1176 unsigned int shift = mc->shift;
1177 unsigned int rshift = mc->rshift;
1178 int max = mc->max;
1179 unsigned int mask = (1 << fls(max)) - 1;
1180 unsigned int invert = mc->invert;
1181 unsigned short val, val2, val_mask;
1182 int ret;
1183
1184 val = (ucontrol->value.integer.value[0] & mask);
1185
1186 if (invert)
1187 val = max - val;
1188 val_mask = mask << shift;
1189 val = val << shift;
1190 if (shift != rshift) {
1191 val2 = (ucontrol->value.integer.value[1] & mask);
1192 if (invert)
1193 val2 = max - val2;
1194 val_mask |= mask << rshift;
1195 val |= val2 << rshift;
1196 }
1197
1198 mutex_lock(&widget->codec->mutex);
1199 widget->value = val;
1200
1201 /* save volume value if the widget is powered down */
1202 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1203 widget->saved_value = val;
1204 mutex_unlock(&widget->codec->mutex);
1205 return 1;
1206 }
1207
1208 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1209 if (widget->event) {
1210 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1211 ret = widget->event(widget, kcontrol,
1212 SND_SOC_DAPM_PRE_REG);
1213 if (ret < 0) {
1214 ret = 1;
1215 goto out;
1216 }
1217 }
1218 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1219 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1220 ret = widget->event(widget, kcontrol,
1221 SND_SOC_DAPM_POST_REG);
1222 } else
1223 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1224
1225 out:
1226 mutex_unlock(&widget->codec->mutex);
1227 return ret;
1228 }
1229 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1230
1231 /**
1232 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1233 * @kcontrol: mixer control
1234 * @uinfo: control element information
1235 *
1236 * Callback to get the value of a dapm enumerated double mixer control.
1237 *
1238 * Returns 0 for success.
1239 */
1240 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1241 struct snd_ctl_elem_value *ucontrol)
1242 {
1243 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1244 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1245 unsigned short val, bitmask;
1246
1247 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1248 ;
1249 val = snd_soc_read(widget->codec, e->reg);
1250 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1251 if (e->shift_l != e->shift_r)
1252 ucontrol->value.enumerated.item[1] =
1253 (val >> e->shift_r) & (bitmask - 1);
1254
1255 return 0;
1256 }
1257 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1258
1259 /**
1260 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1261 * @kcontrol: mixer control
1262 * @uinfo: control element information
1263 *
1264 * Callback to set the value of a dapm enumerated double mixer control.
1265 *
1266 * Returns 0 for success.
1267 */
1268 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1269 struct snd_ctl_elem_value *ucontrol)
1270 {
1271 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1272 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1273 unsigned short val, mux;
1274 unsigned short mask, bitmask;
1275 int ret = 0;
1276
1277 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1278 ;
1279 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1280 return -EINVAL;
1281 mux = ucontrol->value.enumerated.item[0];
1282 val = mux << e->shift_l;
1283 mask = (bitmask - 1) << e->shift_l;
1284 if (e->shift_l != e->shift_r) {
1285 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1286 return -EINVAL;
1287 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1288 mask |= (bitmask - 1) << e->shift_r;
1289 }
1290
1291 mutex_lock(&widget->codec->mutex);
1292 widget->value = val;
1293 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1294 if (widget->event) {
1295 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1296 ret = widget->event(widget,
1297 kcontrol, SND_SOC_DAPM_PRE_REG);
1298 if (ret < 0)
1299 goto out;
1300 }
1301 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1302 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1303 ret = widget->event(widget,
1304 kcontrol, SND_SOC_DAPM_POST_REG);
1305 } else
1306 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1307
1308 out:
1309 mutex_unlock(&widget->codec->mutex);
1310 return ret;
1311 }
1312 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1313
1314 /**
1315 * snd_soc_dapm_new_control - create new dapm control
1316 * @codec: audio codec
1317 * @widget: widget template
1318 *
1319 * Creates a new dapm control based upon the template.
1320 *
1321 * Returns 0 for success else error.
1322 */
1323 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1324 const struct snd_soc_dapm_widget *widget)
1325 {
1326 struct snd_soc_dapm_widget *w;
1327
1328 if ((w = dapm_cnew_widget(widget)) == NULL)
1329 return -ENOMEM;
1330
1331 w->codec = codec;
1332 INIT_LIST_HEAD(&w->sources);
1333 INIT_LIST_HEAD(&w->sinks);
1334 INIT_LIST_HEAD(&w->list);
1335 list_add(&w->list, &codec->dapm_widgets);
1336
1337 /* machine layer set ups unconnected pins and insertions */
1338 w->connected = 1;
1339 return 0;
1340 }
1341 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1342
1343 /**
1344 * snd_soc_dapm_new_controls - create new dapm controls
1345 * @codec: audio codec
1346 * @widget: widget array
1347 * @num: number of widgets
1348 *
1349 * Creates new DAPM controls based upon the templates.
1350 *
1351 * Returns 0 for success else error.
1352 */
1353 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1354 const struct snd_soc_dapm_widget *widget,
1355 int num)
1356 {
1357 int i, ret;
1358
1359 for (i = 0; i < num; i++) {
1360 ret = snd_soc_dapm_new_control(codec, widget);
1361 if (ret < 0)
1362 return ret;
1363 widget++;
1364 }
1365 return 0;
1366 }
1367 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1368
1369
1370 /**
1371 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1372 * @codec: audio codec
1373 * @stream: stream name
1374 * @event: stream event
1375 *
1376 * Sends a stream event to the dapm core. The core then makes any
1377 * necessary widget power changes.
1378 *
1379 * Returns 0 for success else error.
1380 */
1381 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1382 char *stream, int event)
1383 {
1384 struct snd_soc_dapm_widget *w;
1385
1386 if (stream == NULL)
1387 return 0;
1388
1389 mutex_lock(&codec->mutex);
1390 list_for_each_entry(w, &codec->dapm_widgets, list)
1391 {
1392 if (!w->sname)
1393 continue;
1394 pr_debug("widget %s\n %s stream %s event %d\n",
1395 w->name, w->sname, stream, event);
1396 if (strstr(w->sname, stream)) {
1397 switch(event) {
1398 case SND_SOC_DAPM_STREAM_START:
1399 w->active = 1;
1400 break;
1401 case SND_SOC_DAPM_STREAM_STOP:
1402 w->active = 0;
1403 break;
1404 case SND_SOC_DAPM_STREAM_SUSPEND:
1405 if (w->active)
1406 w->suspend = 1;
1407 w->active = 0;
1408 break;
1409 case SND_SOC_DAPM_STREAM_RESUME:
1410 if (w->suspend) {
1411 w->active = 1;
1412 w->suspend = 0;
1413 }
1414 break;
1415 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
1416 break;
1417 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
1418 break;
1419 }
1420 }
1421 }
1422 mutex_unlock(&codec->mutex);
1423
1424 dapm_power_widgets(codec, event);
1425 dump_dapm(codec, __func__);
1426 return 0;
1427 }
1428 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
1429
1430 /**
1431 * snd_soc_dapm_set_bias_level - set the bias level for the system
1432 * @socdev: audio device
1433 * @level: level to configure
1434 *
1435 * Configure the bias (power) levels for the SoC audio device.
1436 *
1437 * Returns 0 for success else error.
1438 */
1439 int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
1440 enum snd_soc_bias_level level)
1441 {
1442 struct snd_soc_codec *codec = socdev->codec;
1443 struct snd_soc_machine *machine = socdev->machine;
1444 int ret = 0;
1445
1446 if (machine->set_bias_level)
1447 ret = machine->set_bias_level(machine, level);
1448 if (ret == 0 && codec->set_bias_level)
1449 ret = codec->set_bias_level(codec, level);
1450
1451 return ret;
1452 }
1453
1454 /**
1455 * snd_soc_dapm_enable_pin - enable pin.
1456 * @snd_soc_codec: SoC codec
1457 * @pin: pin name
1458 *
1459 * Enables input/output pin and it's parents or children widgets iff there is
1460 * a valid audio route and active audio stream.
1461 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1462 * do any widget power switching.
1463 */
1464 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, char *pin)
1465 {
1466 return snd_soc_dapm_set_pin(codec, pin, 1);
1467 }
1468 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
1469
1470 /**
1471 * snd_soc_dapm_disable_pin - disable pin.
1472 * @codec: SoC codec
1473 * @pin: pin name
1474 *
1475 * Disables input/output pin and it's parents or children widgets.
1476 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1477 * do any widget power switching.
1478 */
1479 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, char *pin)
1480 {
1481 return snd_soc_dapm_set_pin(codec, pin, 0);
1482 }
1483 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
1484
1485 /**
1486 * snd_soc_dapm_nc_pin - permanently disable pin.
1487 * @codec: SoC codec
1488 * @pin: pin name
1489 *
1490 * Marks the specified pin as being not connected, disabling it along
1491 * any parent or child widgets. At present this is identical to
1492 * snd_soc_dapm_disable_pin() but in future it will be extended to do
1493 * additional things such as disabling controls which only affect
1494 * paths through the pin.
1495 *
1496 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1497 * do any widget power switching.
1498 */
1499 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, char *pin)
1500 {
1501 return snd_soc_dapm_set_pin(codec, pin, 0);
1502 }
1503 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
1504
1505 /**
1506 * snd_soc_dapm_get_pin_status - get audio pin status
1507 * @codec: audio codec
1508 * @pin: audio signal pin endpoint (or start point)
1509 *
1510 * Get audio pin status - connected or disconnected.
1511 *
1512 * Returns 1 for connected otherwise 0.
1513 */
1514 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, char *pin)
1515 {
1516 struct snd_soc_dapm_widget *w;
1517
1518 list_for_each_entry(w, &codec->dapm_widgets, list) {
1519 if (!strcmp(w->name, pin))
1520 return w->connected;
1521 }
1522
1523 return 0;
1524 }
1525 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
1526
1527 /**
1528 * snd_soc_dapm_free - free dapm resources
1529 * @socdev: SoC device
1530 *
1531 * Free all dapm widgets and resources.
1532 */
1533 void snd_soc_dapm_free(struct snd_soc_device *socdev)
1534 {
1535 struct snd_soc_codec *codec = socdev->codec;
1536
1537 snd_soc_dapm_sys_remove(socdev->dev);
1538 dapm_free_widgets(codec);
1539 }
1540 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
1541
1542 /* Module information */
1543 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
1544 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1545 MODULE_LICENSE("GPL");
linux kernel for loongson