?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
mm-only debug patch...
[mmotm.git] / sound / soc / soc-dapm.c
blobd2af872e4771aa5b0f190d5f06da31f2ee04ceba
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 <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] = 0,
57 [snd_soc_dapm_supply] = 1,
58 [snd_soc_dapm_micbias] = 2,
59 [snd_soc_dapm_aif_in] = 3,
60 [snd_soc_dapm_aif_out] = 3,
61 [snd_soc_dapm_mic] = 4,
62 [snd_soc_dapm_mux] = 5,
63 [snd_soc_dapm_value_mux] = 5,
64 [snd_soc_dapm_dac] = 6,
65 [snd_soc_dapm_mixer] = 7,
66 [snd_soc_dapm_mixer_named_ctl] = 7,
67 [snd_soc_dapm_pga] = 8,
68 [snd_soc_dapm_adc] = 9,
69 [snd_soc_dapm_hp] = 10,
70 [snd_soc_dapm_spk] = 10,
71 [snd_soc_dapm_post] = 11,
72 };
73
74 static int dapm_down_seq[] = {
75 [snd_soc_dapm_pre] = 0,
76 [snd_soc_dapm_adc] = 1,
77 [snd_soc_dapm_hp] = 2,
78 [snd_soc_dapm_spk] = 2,
79 [snd_soc_dapm_pga] = 4,
80 [snd_soc_dapm_mixer_named_ctl] = 5,
81 [snd_soc_dapm_mixer] = 5,
82 [snd_soc_dapm_dac] = 6,
83 [snd_soc_dapm_mic] = 7,
84 [snd_soc_dapm_micbias] = 8,
85 [snd_soc_dapm_mux] = 9,
86 [snd_soc_dapm_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(u32 pop_time, const char *fmt, ...)
100 {
101 va_list args;
102
103 va_start(args, fmt);
104
105 if (pop_time) {
106 vprintk(fmt, args);
107 pop_wait(pop_time);
108 }
109
110 va_end(args);
111 }
112
113 /* create a new dapm widget */
114 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
115 const struct snd_soc_dapm_widget *_widget)
116 {
117 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
118 }
119
120 /**
121 * snd_soc_dapm_set_bias_level - set the bias level for the system
122 * @socdev: audio device
123 * @level: level to configure
124 *
125 * Configure the bias (power) levels for the SoC audio device.
126 *
127 * Returns 0 for success else error.
128 */
129 static int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
130 enum snd_soc_bias_level level)
131 {
132 struct snd_soc_card *card = socdev->card;
133 struct snd_soc_codec *codec = socdev->card->codec;
134 int ret = 0;
135
136 switch (level) {
137 case SND_SOC_BIAS_ON:
138 dev_dbg(socdev->dev, "Setting full bias\n");
139 break;
140 case SND_SOC_BIAS_PREPARE:
141 dev_dbg(socdev->dev, "Setting bias prepare\n");
142 break;
143 case SND_SOC_BIAS_STANDBY:
144 dev_dbg(socdev->dev, "Setting standby bias\n");
145 break;
146 case SND_SOC_BIAS_OFF:
147 dev_dbg(socdev->dev, "Setting bias off\n");
148 break;
149 default:
150 dev_err(socdev->dev, "Setting invalid bias %d\n", level);
151 return -EINVAL;
152 }
153
154 if (card->set_bias_level)
155 ret = card->set_bias_level(card, level);
156 if (ret == 0) {
157 if (codec->set_bias_level)
158 ret = codec->set_bias_level(codec, level);
159 else
160 codec->bias_level = level;
161 }
162
163 return ret;
164 }
165
166 /* set up initial codec paths */
167 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
168 struct snd_soc_dapm_path *p, int i)
169 {
170 switch (w->id) {
171 case snd_soc_dapm_switch:
172 case snd_soc_dapm_mixer:
173 case snd_soc_dapm_mixer_named_ctl: {
174 int val;
175 struct soc_mixer_control *mc = (struct soc_mixer_control *)
176 w->kcontrols[i].private_value;
177 unsigned int reg = mc->reg;
178 unsigned int shift = mc->shift;
179 int max = mc->max;
180 unsigned int mask = (1 << fls(max)) - 1;
181 unsigned int invert = mc->invert;
182
183 val = snd_soc_read(w->codec, reg);
184 val = (val >> shift) & mask;
185
186 if ((invert && !val) || (!invert && val))
187 p->connect = 1;
188 else
189 p->connect = 0;
190 }
191 break;
192 case snd_soc_dapm_mux: {
193 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
194 int val, item, bitmask;
195
196 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
197 ;
198 val = snd_soc_read(w->codec, e->reg);
199 item = (val >> e->shift_l) & (bitmask - 1);
200
201 p->connect = 0;
202 for (i = 0; i < e->max; i++) {
203 if (!(strcmp(p->name, e->texts[i])) && item == i)
204 p->connect = 1;
205 }
206 }
207 break;
208 case snd_soc_dapm_value_mux: {
209 struct soc_enum *e = (struct soc_enum *)
210 w->kcontrols[i].private_value;
211 int val, item;
212
213 val = snd_soc_read(w->codec, e->reg);
214 val = (val >> e->shift_l) & e->mask;
215 for (item = 0; item < e->max; item++) {
216 if (val == e->values[item])
217 break;
218 }
219
220 p->connect = 0;
221 for (i = 0; i < e->max; i++) {
222 if (!(strcmp(p->name, e->texts[i])) && item == i)
223 p->connect = 1;
224 }
225 }
226 break;
227 /* does not effect routing - always connected */
228 case snd_soc_dapm_pga:
229 case snd_soc_dapm_output:
230 case snd_soc_dapm_adc:
231 case snd_soc_dapm_input:
232 case snd_soc_dapm_dac:
233 case snd_soc_dapm_micbias:
234 case snd_soc_dapm_vmid:
235 case snd_soc_dapm_supply:
236 case snd_soc_dapm_aif_in:
237 case snd_soc_dapm_aif_out:
238 p->connect = 1;
239 break;
240 /* does effect routing - dynamically connected */
241 case snd_soc_dapm_hp:
242 case snd_soc_dapm_mic:
243 case snd_soc_dapm_spk:
244 case snd_soc_dapm_line:
245 case snd_soc_dapm_pre:
246 case snd_soc_dapm_post:
247 p->connect = 0;
248 break;
249 }
250 }
251
252 /* connect mux widget to its interconnecting audio paths */
253 static int dapm_connect_mux(struct snd_soc_codec *codec,
254 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
255 struct snd_soc_dapm_path *path, const char *control_name,
256 const struct snd_kcontrol_new *kcontrol)
257 {
258 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
259 int i;
260
261 for (i = 0; i < e->max; i++) {
262 if (!(strcmp(control_name, e->texts[i]))) {
263 list_add(&path->list, &codec->dapm_paths);
264 list_add(&path->list_sink, &dest->sources);
265 list_add(&path->list_source, &src->sinks);
266 path->name = (char*)e->texts[i];
267 dapm_set_path_status(dest, path, 0);
268 return 0;
269 }
270 }
271
272 return -ENODEV;
273 }
274
275 /* connect mixer widget to its interconnecting audio paths */
276 static int dapm_connect_mixer(struct snd_soc_codec *codec,
277 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
278 struct snd_soc_dapm_path *path, const char *control_name)
279 {
280 int i;
281
282 /* search for mixer kcontrol */
283 for (i = 0; i < dest->num_kcontrols; i++) {
284 if (!strcmp(control_name, dest->kcontrols[i].name)) {
285 list_add(&path->list, &codec->dapm_paths);
286 list_add(&path->list_sink, &dest->sources);
287 list_add(&path->list_source, &src->sinks);
288 path->name = dest->kcontrols[i].name;
289 dapm_set_path_status(dest, path, i);
290 return 0;
291 }
292 }
293 return -ENODEV;
294 }
295
296 /* update dapm codec register bits */
297 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
298 {
299 int change, power;
300 unsigned int old, new;
301 struct snd_soc_codec *codec = widget->codec;
302
303 /* check for valid widgets */
304 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
305 widget->id == snd_soc_dapm_output ||
306 widget->id == snd_soc_dapm_hp ||
307 widget->id == snd_soc_dapm_mic ||
308 widget->id == snd_soc_dapm_line ||
309 widget->id == snd_soc_dapm_spk)
310 return 0;
311
312 power = widget->power;
313 if (widget->invert)
314 power = (power ? 0:1);
315
316 old = snd_soc_read(codec, widget->reg);
317 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
318
319 change = old != new;
320 if (change) {
321 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
322 widget->name, widget->power ? "on" : "off",
323 codec->pop_time);
324 snd_soc_write(codec, widget->reg, new);
325 pop_wait(codec->pop_time);
326 }
327 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
328 old, new, change);
329 return change;
330 }
331
332 /* ramps the volume up or down to minimise pops before or after a
333 * DAPM power event */
334 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
335 {
336 const struct snd_kcontrol_new *k = widget->kcontrols;
337
338 if (widget->muted && !power)
339 return 0;
340 if (!widget->muted && power)
341 return 0;
342
343 if (widget->num_kcontrols && k) {
344 struct soc_mixer_control *mc =
345 (struct soc_mixer_control *)k->private_value;
346 unsigned int reg = mc->reg;
347 unsigned int shift = mc->shift;
348 int max = mc->max;
349 unsigned int mask = (1 << fls(max)) - 1;
350 unsigned int invert = mc->invert;
351
352 if (power) {
353 int i;
354 /* power up has happended, increase volume to last level */
355 if (invert) {
356 for (i = max; i > widget->saved_value; i--)
357 snd_soc_update_bits(widget->codec, reg, mask, i);
358 } else {
359 for (i = 0; i < widget->saved_value; i++)
360 snd_soc_update_bits(widget->codec, reg, mask, i);
361 }
362 widget->muted = 0;
363 } else {
364 /* power down is about to occur, decrease volume to mute */
365 int val = snd_soc_read(widget->codec, reg);
366 int i = widget->saved_value = (val >> shift) & mask;
367 if (invert) {
368 for (; i < mask; i++)
369 snd_soc_update_bits(widget->codec, reg, mask, i);
370 } else {
371 for (; i > 0; i--)
372 snd_soc_update_bits(widget->codec, reg, mask, i);
373 }
374 widget->muted = 1;
375 }
376 }
377 return 0;
378 }
379
380 /* create new dapm mixer control */
381 static int dapm_new_mixer(struct snd_soc_codec *codec,
382 struct snd_soc_dapm_widget *w)
383 {
384 int i, ret = 0;
385 size_t name_len;
386 struct snd_soc_dapm_path *path;
387
388 /* add kcontrol */
389 for (i = 0; i < w->num_kcontrols; i++) {
390
391 /* match name */
392 list_for_each_entry(path, &w->sources, list_sink) {
393
394 /* mixer/mux paths name must match control name */
395 if (path->name != (char*)w->kcontrols[i].name)
396 continue;
397
398 /* add dapm control with long name.
399 * for dapm_mixer this is the concatenation of the
400 * mixer and kcontrol name.
401 * for dapm_mixer_named_ctl this is simply the
402 * kcontrol name.
403 */
404 name_len = strlen(w->kcontrols[i].name) + 1;
405 if (w->id != snd_soc_dapm_mixer_named_ctl)
406 name_len += 1 + strlen(w->name);
407
408 path->long_name = kmalloc(name_len, GFP_KERNEL);
409
410 if (path->long_name == NULL)
411 return -ENOMEM;
412
413 switch (w->id) {
414 default:
415 snprintf(path->long_name, name_len, "%s %s",
416 w->name, w->kcontrols[i].name);
417 break;
418 case snd_soc_dapm_mixer_named_ctl:
419 snprintf(path->long_name, name_len, "%s",
420 w->kcontrols[i].name);
421 break;
422 }
423
424 path->long_name[name_len - 1] = '\0';
425
426 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
427 path->long_name);
428 ret = snd_ctl_add(codec->card, path->kcontrol);
429 if (ret < 0) {
430 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s: %d\n",
431 path->long_name,
432 ret);
433 kfree(path->long_name);
434 path->long_name = NULL;
435 return ret;
436 }
437 }
438 }
439 return ret;
440 }
441
442 /* create new dapm mux control */
443 static int dapm_new_mux(struct snd_soc_codec *codec,
444 struct snd_soc_dapm_widget *w)
445 {
446 struct snd_soc_dapm_path *path = NULL;
447 struct snd_kcontrol *kcontrol;
448 int ret = 0;
449
450 if (!w->num_kcontrols) {
451 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
452 return -EINVAL;
453 }
454
455 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
456 ret = snd_ctl_add(codec->card, kcontrol);
457 if (ret < 0)
458 goto err;
459
460 list_for_each_entry(path, &w->sources, list_sink)
461 path->kcontrol = kcontrol;
462
463 return ret;
464
465 err:
466 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
467 return ret;
468 }
469
470 /* create new dapm volume control */
471 static int dapm_new_pga(struct snd_soc_codec *codec,
472 struct snd_soc_dapm_widget *w)
473 {
474 struct snd_kcontrol *kcontrol;
475 int ret = 0;
476
477 if (!w->num_kcontrols)
478 return -EINVAL;
479
480 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
481 ret = snd_ctl_add(codec->card, kcontrol);
482 if (ret < 0) {
483 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
484 return ret;
485 }
486
487 return ret;
488 }
489
490 /* reset 'walked' bit for each dapm path */
491 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
492 {
493 struct snd_soc_dapm_path *p;
494
495 list_for_each_entry(p, &codec->dapm_paths, list)
496 p->walked = 0;
497 }
498
499 /*
500 * Recursively check for a completed path to an active or physically connected
501 * output widget. Returns number of complete paths.
502 */
503 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
504 {
505 struct snd_soc_dapm_path *path;
506 int con = 0;
507
508 if (widget->id == snd_soc_dapm_supply)
509 return 0;
510
511 switch (widget->id) {
512 case snd_soc_dapm_adc:
513 case snd_soc_dapm_aif_out:
514 if (widget->active)
515 return 1;
516 default:
517 break;
518 }
519
520 if (widget->connected) {
521 /* connected pin ? */
522 if (widget->id == snd_soc_dapm_output && !widget->ext)
523 return 1;
524
525 /* connected jack or spk ? */
526 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
527 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
528 return 1;
529 }
530
531 list_for_each_entry(path, &widget->sinks, list_source) {
532 if (path->walked)
533 continue;
534
535 if (path->sink && path->connect) {
536 path->walked = 1;
537 con += is_connected_output_ep(path->sink);
538 }
539 }
540
541 return con;
542 }
543
544 /*
545 * Recursively check for a completed path to an active or physically connected
546 * input widget. Returns number of complete paths.
547 */
548 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
549 {
550 struct snd_soc_dapm_path *path;
551 int con = 0;
552
553 if (widget->id == snd_soc_dapm_supply)
554 return 0;
555
556 /* active stream ? */
557 switch (widget->id) {
558 case snd_soc_dapm_dac:
559 case snd_soc_dapm_aif_in:
560 if (widget->active)
561 return 1;
562 default:
563 break;
564 }
565
566 if (widget->connected) {
567 /* connected pin ? */
568 if (widget->id == snd_soc_dapm_input && !widget->ext)
569 return 1;
570
571 /* connected VMID/Bias for lower pops */
572 if (widget->id == snd_soc_dapm_vmid)
573 return 1;
574
575 /* connected jack ? */
576 if (widget->id == snd_soc_dapm_mic ||
577 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
578 return 1;
579 }
580
581 list_for_each_entry(path, &widget->sources, list_sink) {
582 if (path->walked)
583 continue;
584
585 if (path->source && path->connect) {
586 path->walked = 1;
587 con += is_connected_input_ep(path->source);
588 }
589 }
590
591 return con;
592 }
593
594 /*
595 * Handler for generic register modifier widget.
596 */
597 int dapm_reg_event(struct snd_soc_dapm_widget *w,
598 struct snd_kcontrol *kcontrol, int event)
599 {
600 unsigned int val;
601
602 if (SND_SOC_DAPM_EVENT_ON(event))
603 val = w->on_val;
604 else
605 val = w->off_val;
606
607 snd_soc_update_bits(w->codec, -(w->reg + 1),
608 w->mask << w->shift, val << w->shift);
609
610 return 0;
611 }
612 EXPORT_SYMBOL_GPL(dapm_reg_event);
613
614 /* Standard power change method, used to apply power changes to most
615 * widgets.
616 */
617 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
618 {
619 int ret;
620
621 /* call any power change event handlers */
622 if (w->event)
623 pr_debug("power %s event for %s flags %x\n",
624 w->power ? "on" : "off",
625 w->name, w->event_flags);
626
627 /* power up pre event */
628 if (w->power && w->event &&
629 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
630 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
631 if (ret < 0)
632 return ret;
633 }
634
635 /* power down pre event */
636 if (!w->power && w->event &&
637 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
638 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
639 if (ret < 0)
640 return ret;
641 }
642
643 /* Lower PGA volume to reduce pops */
644 if (w->id == snd_soc_dapm_pga && !w->power)
645 dapm_set_pga(w, w->power);
646
647 dapm_update_bits(w);
648
649 /* Raise PGA volume to reduce pops */
650 if (w->id == snd_soc_dapm_pga && w->power)
651 dapm_set_pga(w, w->power);
652
653 /* power up post event */
654 if (w->power && w->event &&
655 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
656 ret = w->event(w,
657 NULL, SND_SOC_DAPM_POST_PMU);
658 if (ret < 0)
659 return ret;
660 }
661
662 /* power down post event */
663 if (!w->power && w->event &&
664 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
665 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
666 if (ret < 0)
667 return ret;
668 }
669
670 return 0;
671 }
672
673 /* Generic check to see if a widget should be powered.
674 */
675 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
676 {
677 int in, out;
678
679 in = is_connected_input_ep(w);
680 dapm_clear_walk(w->codec);
681 out = is_connected_output_ep(w);
682 dapm_clear_walk(w->codec);
683 return out != 0 && in != 0;
684 }
685
686 /* Check to see if an ADC has power */
687 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
688 {
689 int in;
690
691 if (w->active) {
692 in = is_connected_input_ep(w);
693 dapm_clear_walk(w->codec);
694 return in != 0;
695 } else {
696 return dapm_generic_check_power(w);
697 }
698 }
699
700 /* Check to see if a DAC has power */
701 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
702 {
703 int out;
704
705 if (w->active) {
706 out = is_connected_output_ep(w);
707 dapm_clear_walk(w->codec);
708 return out != 0;
709 } else {
710 return dapm_generic_check_power(w);
711 }
712 }
713
714 /* Check to see if a power supply is needed */
715 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
716 {
717 struct snd_soc_dapm_path *path;
718 int power = 0;
719
720 /* Check if one of our outputs is connected */
721 list_for_each_entry(path, &w->sinks, list_source) {
722 if (path->connected &&
723 !path->connected(path->source, path->sink))
724 continue;
725
726 if (path->sink && path->sink->power_check &&
727 path->sink->power_check(path->sink)) {
728 power = 1;
729 break;
730 }
731 }
732
733 dapm_clear_walk(w->codec);
734
735 return power;
736 }
737
738 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
739 struct snd_soc_dapm_widget *b,
740 int sort[])
741 {
742 if (sort[a->id] != sort[b->id])
743 return sort[a->id] - sort[b->id];
744 if (a->reg != b->reg)
745 return a->reg - b->reg;
746
747 return 0;
748 }
749
750 /* Insert a widget in order into a DAPM power sequence. */
751 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
752 struct list_head *list,
753 int sort[])
754 {
755 struct snd_soc_dapm_widget *w;
756
757 list_for_each_entry(w, list, power_list)
758 if (dapm_seq_compare(new_widget, w, sort) < 0) {
759 list_add_tail(&new_widget->power_list, &w->power_list);
760 return;
761 }
762
763 list_add_tail(&new_widget->power_list, list);
764 }
765
766 /* Apply the coalesced changes from a DAPM sequence */
767 static void dapm_seq_run_coalesced(struct snd_soc_codec *codec,
768 struct list_head *pending)
769 {
770 struct snd_soc_dapm_widget *w;
771 int reg, power, ret;
772 unsigned int value = 0;
773 unsigned int mask = 0;
774 unsigned int cur_mask;
775
776 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
777 power_list)->reg;
778
779 list_for_each_entry(w, pending, power_list) {
780 cur_mask = 1 << w->shift;
781 BUG_ON(reg != w->reg);
782
783 if (w->invert)
784 power = !w->power;
785 else
786 power = w->power;
787
788 mask |= cur_mask;
789 if (power)
790 value |= cur_mask;
791
792 pop_dbg(codec->pop_time,
793 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
794 w->name, reg, value, mask);
795
796 /* power up pre event */
797 if (w->power && w->event &&
798 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
799 pop_dbg(codec->pop_time, "pop test : %s PRE_PMU\n",
800 w->name);
801 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
802 if (ret < 0)
803 pr_err("%s: pre event failed: %d\n",
804 w->name, ret);
805 }
806
807 /* power down pre event */
808 if (!w->power && w->event &&
809 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
810 pop_dbg(codec->pop_time, "pop test : %s PRE_PMD\n",
811 w->name);
812 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
813 if (ret < 0)
814 pr_err("%s: pre event failed: %d\n",
815 w->name, ret);
816 }
817
818 /* Lower PGA volume to reduce pops */
819 if (w->id == snd_soc_dapm_pga && !w->power)
820 dapm_set_pga(w, w->power);
821 }
822
823 if (reg >= 0) {
824 pop_dbg(codec->pop_time,
825 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
826 value, mask, reg, codec->pop_time);
827 pop_wait(codec->pop_time);
828 snd_soc_update_bits(codec, reg, mask, value);
829 }
830
831 list_for_each_entry(w, pending, power_list) {
832 /* Raise PGA volume to reduce pops */
833 if (w->id == snd_soc_dapm_pga && w->power)
834 dapm_set_pga(w, w->power);
835
836 /* power up post event */
837 if (w->power && w->event &&
838 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
839 pop_dbg(codec->pop_time, "pop test : %s POST_PMU\n",
840 w->name);
841 ret = w->event(w,
842 NULL, SND_SOC_DAPM_POST_PMU);
843 if (ret < 0)
844 pr_err("%s: post event failed: %d\n",
845 w->name, ret);
846 }
847
848 /* power down post event */
849 if (!w->power && w->event &&
850 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
851 pop_dbg(codec->pop_time, "pop test : %s POST_PMD\n",
852 w->name);
853 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
854 if (ret < 0)
855 pr_err("%s: post event failed: %d\n",
856 w->name, ret);
857 }
858 }
859 }
860
861 /* Apply a DAPM power sequence.
862 *
863 * We walk over a pre-sorted list of widgets to apply power to. In
864 * order to minimise the number of writes to the device required
865 * multiple widgets will be updated in a single write where possible.
866 * Currently anything that requires more than a single write is not
867 * handled.
868 */
869 static void dapm_seq_run(struct snd_soc_codec *codec, struct list_head *list,
870 int event, int sort[])
871 {
872 struct snd_soc_dapm_widget *w, *n;
873 LIST_HEAD(pending);
874 int cur_sort = -1;
875 int cur_reg = SND_SOC_NOPM;
876 int ret;
877
878 list_for_each_entry_safe(w, n, list, power_list) {
879 ret = 0;
880
881 /* Do we need to apply any queued changes? */
882 if (sort[w->id] != cur_sort || w->reg != cur_reg) {
883 if (!list_empty(&pending))
884 dapm_seq_run_coalesced(codec, &pending);
885
886 INIT_LIST_HEAD(&pending);
887 cur_sort = -1;
888 cur_reg = SND_SOC_NOPM;
889 }
890
891 switch (w->id) {
892 case snd_soc_dapm_pre:
893 if (!w->event)
894 list_for_each_entry_safe_continue(w, n, list,
895 power_list);
896
897 if (event == SND_SOC_DAPM_STREAM_START)
898 ret = w->event(w,
899 NULL, SND_SOC_DAPM_PRE_PMU);
900 else if (event == SND_SOC_DAPM_STREAM_STOP)
901 ret = w->event(w,
902 NULL, SND_SOC_DAPM_PRE_PMD);
903 break;
904
905 case snd_soc_dapm_post:
906 if (!w->event)
907 list_for_each_entry_safe_continue(w, n, list,
908 power_list);
909
910 if (event == SND_SOC_DAPM_STREAM_START)
911 ret = w->event(w,
912 NULL, SND_SOC_DAPM_POST_PMU);
913 else if (event == SND_SOC_DAPM_STREAM_STOP)
914 ret = w->event(w,
915 NULL, SND_SOC_DAPM_POST_PMD);
916 break;
917
918 case snd_soc_dapm_input:
919 case snd_soc_dapm_output:
920 case snd_soc_dapm_hp:
921 case snd_soc_dapm_mic:
922 case snd_soc_dapm_line:
923 case snd_soc_dapm_spk:
924 /* No register support currently */
925 ret = dapm_generic_apply_power(w);
926 break;
927
928 default:
929 /* Queue it up for application */
930 cur_sort = sort[w->id];
931 cur_reg = w->reg;
932 list_move(&w->power_list, &pending);
933 break;
934 }
935
936 if (ret < 0)
937 pr_err("Failed to apply widget power: %d\n",
938 ret);
939 }
940
941 if (!list_empty(&pending))
942 dapm_seq_run_coalesced(codec, &pending);
943 }
944
945 /*
946 * Scan each dapm widget for complete audio path.
947 * A complete path is a route that has valid endpoints i.e.:-
948 *
949 * o DAC to output pin.
950 * o Input Pin to ADC.
951 * o Input pin to Output pin (bypass, sidetone)
952 * o DAC to ADC (loopback).
953 */
954 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
955 {
956 struct snd_soc_device *socdev = codec->socdev;
957 struct snd_soc_dapm_widget *w;
958 LIST_HEAD(up_list);
959 LIST_HEAD(down_list);
960 int ret = 0;
961 int power;
962 int sys_power = 0;
963
964 /* Check which widgets we need to power and store them in
965 * lists indicating if they should be powered up or down.
966 */
967 list_for_each_entry(w, &codec->dapm_widgets, list) {
968 switch (w->id) {
969 case snd_soc_dapm_pre:
970 dapm_seq_insert(w, &down_list, dapm_down_seq);
971 break;
972 case snd_soc_dapm_post:
973 dapm_seq_insert(w, &up_list, dapm_up_seq);
974 break;
975
976 default:
977 if (!w->power_check)
978 continue;
979
980 power = w->power_check(w);
981 if (power)
982 sys_power = 1;
983
984 if (w->power == power)
985 continue;
986
987 if (power)
988 dapm_seq_insert(w, &up_list, dapm_up_seq);
989 else
990 dapm_seq_insert(w, &down_list, dapm_down_seq);
991
992 w->power = power;
993 break;
994 }
995 }
996
997 /* If there are no DAPM widgets then try to figure out power from the
998 * event type.
999 */
1000 if (list_empty(&codec->dapm_widgets)) {
1001 switch (event) {
1002 case SND_SOC_DAPM_STREAM_START:
1003 case SND_SOC_DAPM_STREAM_RESUME:
1004 sys_power = 1;
1005 break;
1006 case SND_SOC_DAPM_STREAM_NOP:
1007 sys_power = codec->bias_level != SND_SOC_BIAS_STANDBY;
1008 default:
1009 break;
1010 }
1011 }
1012
1013 /* If we're changing to all on or all off then prepare */
1014 if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
1015 (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {
1016 ret = snd_soc_dapm_set_bias_level(socdev,
1017 SND_SOC_BIAS_PREPARE);
1018 if (ret != 0)
1019 pr_err("Failed to prepare bias: %d\n", ret);
1020 }
1021
1022 /* Power down widgets first; try to avoid amplifying pops. */
1023 dapm_seq_run(codec, &down_list, event, dapm_down_seq);
1024
1025 /* Now power up. */
1026 dapm_seq_run(codec, &up_list, event, dapm_up_seq);
1027
1028 /* If we just powered the last thing off drop to standby bias */
1029 if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
1030 ret = snd_soc_dapm_set_bias_level(socdev,
1031 SND_SOC_BIAS_STANDBY);
1032 if (ret != 0)
1033 pr_err("Failed to apply standby bias: %d\n", ret);
1034 }
1035
1036 /* If we just powered up then move to active bias */
1037 if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
1038 ret = snd_soc_dapm_set_bias_level(socdev,
1039 SND_SOC_BIAS_ON);
1040 if (ret != 0)
1041 pr_err("Failed to apply active bias: %d\n", ret);
1042 }
1043
1044 pop_dbg(codec->pop_time, "DAPM sequencing finished, waiting %dms\n",
1045 codec->pop_time);
1046
1047 return 0;
1048 }
1049
1050 #ifdef DEBUG
1051 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
1052 {
1053 struct snd_soc_dapm_widget *w;
1054 struct snd_soc_dapm_path *p = NULL;
1055 int in, out;
1056
1057 printk("DAPM %s %s\n", codec->name, action);
1058
1059 list_for_each_entry(w, &codec->dapm_widgets, list) {
1060
1061 /* only display widgets that effect routing */
1062 switch (w->id) {
1063 case snd_soc_dapm_pre:
1064 case snd_soc_dapm_post:
1065 case snd_soc_dapm_vmid:
1066 continue;
1067 case snd_soc_dapm_mux:
1068 case snd_soc_dapm_value_mux:
1069 case snd_soc_dapm_output:
1070 case snd_soc_dapm_input:
1071 case snd_soc_dapm_switch:
1072 case snd_soc_dapm_hp:
1073 case snd_soc_dapm_mic:
1074 case snd_soc_dapm_spk:
1075 case snd_soc_dapm_line:
1076 case snd_soc_dapm_micbias:
1077 case snd_soc_dapm_dac:
1078 case snd_soc_dapm_adc:
1079 case snd_soc_dapm_pga:
1080 case snd_soc_dapm_mixer:
1081 case snd_soc_dapm_mixer_named_ctl:
1082 case snd_soc_dapm_supply:
1083 case snd_soc_dapm_aif_in:
1084 case snd_soc_dapm_aif_out:
1085 if (w->name) {
1086 in = is_connected_input_ep(w);
1087 dapm_clear_walk(w->codec);
1088 out = is_connected_output_ep(w);
1089 dapm_clear_walk(w->codec);
1090 printk("%s: %s in %d out %d\n", w->name,
1091 w->power ? "On":"Off",in, out);
1092
1093 list_for_each_entry(p, &w->sources, list_sink) {
1094 if (p->connect)
1095 printk(" in %s %s\n", p->name ? p->name : "static",
1096 p->source->name);
1097 }
1098 list_for_each_entry(p, &w->sinks, list_source) {
1099 if (p->connect)
1100 printk(" out %s %s\n", p->name ? p->name : "static",
1101 p->sink->name);
1102 }
1103 }
1104 break;
1105 }
1106 }
1107 }
1108 #endif
1109
1110 #ifdef CONFIG_DEBUG_FS
1111 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1112 {
1113 file->private_data = inode->i_private;
1114 return 0;
1115 }
1116
1117 static ssize_t dapm_widget_power_read_file(struct file *file,
1118 char __user *user_buf,
1119 size_t count, loff_t *ppos)
1120 {
1121 struct snd_soc_dapm_widget *w = file->private_data;
1122 char *buf;
1123 int in, out;
1124 ssize_t ret;
1125 struct snd_soc_dapm_path *p = NULL;
1126
1127 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1128 if (!buf)
1129 return -ENOMEM;
1130
1131 in = is_connected_input_ep(w);
1132 dapm_clear_walk(w->codec);
1133 out = is_connected_output_ep(w);
1134 dapm_clear_walk(w->codec);
1135
1136 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d\n",
1137 w->name, w->power ? "On" : "Off", in, out);
1138
1139 if (w->sname)
1140 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1141 w->sname,
1142 w->active ? "active" : "inactive");
1143
1144 list_for_each_entry(p, &w->sources, list_sink) {
1145 if (p->connected && !p->connected(w, p->sink))
1146 continue;
1147
1148 if (p->connect)
1149 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1150 " in %s %s\n",
1151 p->name ? p->name : "static",
1152 p->source->name);
1153 }
1154 list_for_each_entry(p, &w->sinks, list_source) {
1155 if (p->connected && !p->connected(w, p->sink))
1156 continue;
1157
1158 if (p->connect)
1159 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1160 " out %s %s\n",
1161 p->name ? p->name : "static",
1162 p->sink->name);
1163 }
1164
1165 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1166
1167 kfree(buf);
1168 return ret;
1169 }
1170
1171 static const struct file_operations dapm_widget_power_fops = {
1172 .open = dapm_widget_power_open_file,
1173 .read = dapm_widget_power_read_file,
1174 };
1175
1176 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1177 {
1178 struct snd_soc_dapm_widget *w;
1179 struct dentry *d;
1180
1181 if (!codec->debugfs_dapm)
1182 return;
1183
1184 list_for_each_entry(w, &codec->dapm_widgets, list) {
1185 if (!w->name)
1186 continue;
1187
1188 d = debugfs_create_file(w->name, 0444,
1189 codec->debugfs_dapm, w,
1190 &dapm_widget_power_fops);
1191 if (!d)
1192 printk(KERN_WARNING
1193 "ASoC: Failed to create %s debugfs file\n",
1194 w->name);
1195 }
1196 }
1197 #else
1198 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1199 {
1200 }
1201 #endif
1202
1203 /* test and update the power status of a mux widget */
1204 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1205 struct snd_kcontrol *kcontrol, int change,
1206 int mux, struct soc_enum *e)
1207 {
1208 struct snd_soc_dapm_path *path;
1209 int found = 0;
1210
1211 if (widget->id != snd_soc_dapm_mux &&
1212 widget->id != snd_soc_dapm_value_mux)
1213 return -ENODEV;
1214
1215 if (!change)
1216 return 0;
1217
1218 /* find dapm widget path assoc with kcontrol */
1219 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1220 if (path->kcontrol != kcontrol)
1221 continue;
1222
1223 if (!path->name || !e->texts[mux])
1224 continue;
1225
1226 found = 1;
1227 /* we now need to match the string in the enum to the path */
1228 if (!(strcmp(path->name, e->texts[mux])))
1229 path->connect = 1; /* new connection */
1230 else
1231 path->connect = 0; /* old connection must be powered down */
1232 }
1233
1234 if (found) {
1235 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1236 dump_dapm(widget->codec, "mux power update");
1237 }
1238
1239 return 0;
1240 }
1241
1242 /* test and update the power status of a mixer or switch widget */
1243 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1244 struct snd_kcontrol *kcontrol, int reg,
1245 int val_mask, int val, int invert)
1246 {
1247 struct snd_soc_dapm_path *path;
1248 int found = 0;
1249
1250 if (widget->id != snd_soc_dapm_mixer &&
1251 widget->id != snd_soc_dapm_mixer_named_ctl &&
1252 widget->id != snd_soc_dapm_switch)
1253 return -ENODEV;
1254
1255 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
1256 return 0;
1257
1258 /* find dapm widget path assoc with kcontrol */
1259 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1260 if (path->kcontrol != kcontrol)
1261 continue;
1262
1263 /* found, now check type */
1264 found = 1;
1265 if (val)
1266 /* new connection */
1267 path->connect = invert ? 0:1;
1268 else
1269 /* old connection must be powered down */
1270 path->connect = invert ? 1:0;
1271 break;
1272 }
1273
1274 if (found) {
1275 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1276 dump_dapm(widget->codec, "mixer power update");
1277 }
1278
1279 return 0;
1280 }
1281
1282 /* show dapm widget status in sys fs */
1283 static ssize_t dapm_widget_show(struct device *dev,
1284 struct device_attribute *attr, char *buf)
1285 {
1286 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1287 struct snd_soc_codec *codec = devdata->card->codec;
1288 struct snd_soc_dapm_widget *w;
1289 int count = 0;
1290 char *state = "not set";
1291
1292 list_for_each_entry(w, &codec->dapm_widgets, list) {
1293
1294 /* only display widgets that burnm power */
1295 switch (w->id) {
1296 case snd_soc_dapm_hp:
1297 case snd_soc_dapm_mic:
1298 case snd_soc_dapm_spk:
1299 case snd_soc_dapm_line:
1300 case snd_soc_dapm_micbias:
1301 case snd_soc_dapm_dac:
1302 case snd_soc_dapm_adc:
1303 case snd_soc_dapm_pga:
1304 case snd_soc_dapm_mixer:
1305 case snd_soc_dapm_mixer_named_ctl:
1306 case snd_soc_dapm_supply:
1307 if (w->name)
1308 count += sprintf(buf + count, "%s: %s\n",
1309 w->name, w->power ? "On":"Off");
1310 break;
1311 default:
1312 break;
1313 }
1314 }
1315
1316 switch (codec->bias_level) {
1317 case SND_SOC_BIAS_ON:
1318 state = "On";
1319 break;
1320 case SND_SOC_BIAS_PREPARE:
1321 state = "Prepare";
1322 break;
1323 case SND_SOC_BIAS_STANDBY:
1324 state = "Standby";
1325 break;
1326 case SND_SOC_BIAS_OFF:
1327 state = "Off";
1328 break;
1329 }
1330 count += sprintf(buf + count, "PM State: %s\n", state);
1331
1332 return count;
1333 }
1334
1335 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1336
1337 int snd_soc_dapm_sys_add(struct device *dev)
1338 {
1339 return device_create_file(dev, &dev_attr_dapm_widget);
1340 }
1341
1342 static void snd_soc_dapm_sys_remove(struct device *dev)
1343 {
1344 device_remove_file(dev, &dev_attr_dapm_widget);
1345 }
1346
1347 /* free all dapm widgets and resources */
1348 static void dapm_free_widgets(struct snd_soc_codec *codec)
1349 {
1350 struct snd_soc_dapm_widget *w, *next_w;
1351 struct snd_soc_dapm_path *p, *next_p;
1352
1353 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
1354 list_del(&w->list);
1355 kfree(w);
1356 }
1357
1358 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
1359 list_del(&p->list);
1360 kfree(p->long_name);
1361 kfree(p);
1362 }
1363 }
1364
1365 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
1366 const char *pin, int status)
1367 {
1368 struct snd_soc_dapm_widget *w;
1369
1370 list_for_each_entry(w, &codec->dapm_widgets, list) {
1371 if (!strcmp(w->name, pin)) {
1372 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
1373 w->connected = status;
1374 return 0;
1375 }
1376 }
1377
1378 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
1379 return -EINVAL;
1380 }
1381
1382 /**
1383 * snd_soc_dapm_sync - scan and power dapm paths
1384 * @codec: audio codec
1385 *
1386 * Walks all dapm audio paths and powers widgets according to their
1387 * stream or path usage.
1388 *
1389 * Returns 0 for success.
1390 */
1391 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
1392 {
1393 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1394 dump_dapm(codec, "sync");
1395 return ret;
1396 }
1397 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1398
1399 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
1400 const struct snd_soc_dapm_route *route)
1401 {
1402 struct snd_soc_dapm_path *path;
1403 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1404 const char *sink = route->sink;
1405 const char *control = route->control;
1406 const char *source = route->source;
1407 int ret = 0;
1408
1409 /* find src and dest widgets */
1410 list_for_each_entry(w, &codec->dapm_widgets, list) {
1411
1412 if (!wsink && !(strcmp(w->name, sink))) {
1413 wsink = w;
1414 continue;
1415 }
1416 if (!wsource && !(strcmp(w->name, source))) {
1417 wsource = w;
1418 }
1419 }
1420
1421 if (wsource == NULL || wsink == NULL)
1422 return -ENODEV;
1423
1424 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1425 if (!path)
1426 return -ENOMEM;
1427
1428 path->source = wsource;
1429 path->sink = wsink;
1430 path->connected = route->connected;
1431 INIT_LIST_HEAD(&path->list);
1432 INIT_LIST_HEAD(&path->list_source);
1433 INIT_LIST_HEAD(&path->list_sink);
1434
1435 /* check for external widgets */
1436 if (wsink->id == snd_soc_dapm_input) {
1437 if (wsource->id == snd_soc_dapm_micbias ||
1438 wsource->id == snd_soc_dapm_mic ||
1439 wsource->id == snd_soc_dapm_line ||
1440 wsource->id == snd_soc_dapm_output)
1441 wsink->ext = 1;
1442 }
1443 if (wsource->id == snd_soc_dapm_output) {
1444 if (wsink->id == snd_soc_dapm_spk ||
1445 wsink->id == snd_soc_dapm_hp ||
1446 wsink->id == snd_soc_dapm_line ||
1447 wsink->id == snd_soc_dapm_input)
1448 wsource->ext = 1;
1449 }
1450
1451 /* connect static paths */
1452 if (control == NULL) {
1453 list_add(&path->list, &codec->dapm_paths);
1454 list_add(&path->list_sink, &wsink->sources);
1455 list_add(&path->list_source, &wsource->sinks);
1456 path->connect = 1;
1457 return 0;
1458 }
1459
1460 /* connect dynamic paths */
1461 switch(wsink->id) {
1462 case snd_soc_dapm_adc:
1463 case snd_soc_dapm_dac:
1464 case snd_soc_dapm_pga:
1465 case snd_soc_dapm_input:
1466 case snd_soc_dapm_output:
1467 case snd_soc_dapm_micbias:
1468 case snd_soc_dapm_vmid:
1469 case snd_soc_dapm_pre:
1470 case snd_soc_dapm_post:
1471 case snd_soc_dapm_supply:
1472 case snd_soc_dapm_aif_in:
1473 case snd_soc_dapm_aif_out:
1474 list_add(&path->list, &codec->dapm_paths);
1475 list_add(&path->list_sink, &wsink->sources);
1476 list_add(&path->list_source, &wsource->sinks);
1477 path->connect = 1;
1478 return 0;
1479 case snd_soc_dapm_mux:
1480 case snd_soc_dapm_value_mux:
1481 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1482 &wsink->kcontrols[0]);
1483 if (ret != 0)
1484 goto err;
1485 break;
1486 case snd_soc_dapm_switch:
1487 case snd_soc_dapm_mixer:
1488 case snd_soc_dapm_mixer_named_ctl:
1489 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1490 if (ret != 0)
1491 goto err;
1492 break;
1493 case snd_soc_dapm_hp:
1494 case snd_soc_dapm_mic:
1495 case snd_soc_dapm_line:
1496 case snd_soc_dapm_spk:
1497 list_add(&path->list, &codec->dapm_paths);
1498 list_add(&path->list_sink, &wsink->sources);
1499 list_add(&path->list_source, &wsource->sinks);
1500 path->connect = 0;
1501 return 0;
1502 }
1503 return 0;
1504
1505 err:
1506 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1507 control, sink);
1508 kfree(path);
1509 return ret;
1510 }
1511
1512 /**
1513 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1514 * @codec: codec
1515 * @route: audio routes
1516 * @num: number of routes
1517 *
1518 * Connects 2 dapm widgets together via a named audio path. The sink is
1519 * the widget receiving the audio signal, whilst the source is the sender
1520 * of the audio signal.
1521 *
1522 * Returns 0 for success else error. On error all resources can be freed
1523 * with a call to snd_soc_card_free().
1524 */
1525 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1526 const struct snd_soc_dapm_route *route, int num)
1527 {
1528 int i, ret;
1529
1530 for (i = 0; i < num; i++) {
1531 ret = snd_soc_dapm_add_route(codec, route);
1532 if (ret < 0) {
1533 printk(KERN_ERR "Failed to add route %s->%s\n",
1534 route->source,
1535 route->sink);
1536 return ret;
1537 }
1538 route++;
1539 }
1540
1541 return 0;
1542 }
1543 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1544
1545 /**
1546 * snd_soc_dapm_new_widgets - add new dapm widgets
1547 * @codec: audio codec
1548 *
1549 * Checks the codec for any new dapm widgets and creates them if found.
1550 *
1551 * Returns 0 for success.
1552 */
1553 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1554 {
1555 struct snd_soc_dapm_widget *w;
1556
1557 list_for_each_entry(w, &codec->dapm_widgets, list)
1558 {
1559 if (w->new)
1560 continue;
1561
1562 switch(w->id) {
1563 case snd_soc_dapm_switch:
1564 case snd_soc_dapm_mixer:
1565 case snd_soc_dapm_mixer_named_ctl:
1566 w->power_check = dapm_generic_check_power;
1567 dapm_new_mixer(codec, w);
1568 break;
1569 case snd_soc_dapm_mux:
1570 case snd_soc_dapm_value_mux:
1571 w->power_check = dapm_generic_check_power;
1572 dapm_new_mux(codec, w);
1573 break;
1574 case snd_soc_dapm_adc:
1575 case snd_soc_dapm_aif_out:
1576 w->power_check = dapm_adc_check_power;
1577 break;
1578 case snd_soc_dapm_dac:
1579 case snd_soc_dapm_aif_in:
1580 w->power_check = dapm_dac_check_power;
1581 break;
1582 case snd_soc_dapm_pga:
1583 w->power_check = dapm_generic_check_power;
1584 dapm_new_pga(codec, w);
1585 break;
1586 case snd_soc_dapm_input:
1587 case snd_soc_dapm_output:
1588 case snd_soc_dapm_micbias:
1589 case snd_soc_dapm_spk:
1590 case snd_soc_dapm_hp:
1591 case snd_soc_dapm_mic:
1592 case snd_soc_dapm_line:
1593 w->power_check = dapm_generic_check_power;
1594 break;
1595 case snd_soc_dapm_supply:
1596 w->power_check = dapm_supply_check_power;
1597 case snd_soc_dapm_vmid:
1598 case snd_soc_dapm_pre:
1599 case snd_soc_dapm_post:
1600 break;
1601 }
1602 w->new = 1;
1603 }
1604
1605 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1606 return 0;
1607 }
1608 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1609
1610 /**
1611 * snd_soc_dapm_get_volsw - dapm mixer get callback
1612 * @kcontrol: mixer control
1613 * @ucontrol: control element information
1614 *
1615 * Callback to get the value of a dapm mixer control.
1616 *
1617 * Returns 0 for success.
1618 */
1619 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1620 struct snd_ctl_elem_value *ucontrol)
1621 {
1622 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1623 struct soc_mixer_control *mc =
1624 (struct soc_mixer_control *)kcontrol->private_value;
1625 unsigned int reg = mc->reg;
1626 unsigned int shift = mc->shift;
1627 unsigned int rshift = mc->rshift;
1628 int max = mc->max;
1629 unsigned int invert = mc->invert;
1630 unsigned int mask = (1 << fls(max)) - 1;
1631
1632 /* return the saved value if we are powered down */
1633 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1634 ucontrol->value.integer.value[0] = widget->saved_value;
1635 return 0;
1636 }
1637
1638 ucontrol->value.integer.value[0] =
1639 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1640 if (shift != rshift)
1641 ucontrol->value.integer.value[1] =
1642 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1643 if (invert) {
1644 ucontrol->value.integer.value[0] =
1645 max - ucontrol->value.integer.value[0];
1646 if (shift != rshift)
1647 ucontrol->value.integer.value[1] =
1648 max - ucontrol->value.integer.value[1];
1649 }
1650
1651 return 0;
1652 }
1653 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1654
1655 /**
1656 * snd_soc_dapm_put_volsw - dapm mixer set callback
1657 * @kcontrol: mixer control
1658 * @ucontrol: control element information
1659 *
1660 * Callback to set the value of a dapm mixer control.
1661 *
1662 * Returns 0 for success.
1663 */
1664 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1665 struct snd_ctl_elem_value *ucontrol)
1666 {
1667 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1668 struct soc_mixer_control *mc =
1669 (struct soc_mixer_control *)kcontrol->private_value;
1670 unsigned int reg = mc->reg;
1671 unsigned int shift = mc->shift;
1672 unsigned int rshift = mc->rshift;
1673 int max = mc->max;
1674 unsigned int mask = (1 << fls(max)) - 1;
1675 unsigned int invert = mc->invert;
1676 unsigned int val, val2, val_mask;
1677 int ret;
1678
1679 val = (ucontrol->value.integer.value[0] & mask);
1680
1681 if (invert)
1682 val = max - val;
1683 val_mask = mask << shift;
1684 val = val << shift;
1685 if (shift != rshift) {
1686 val2 = (ucontrol->value.integer.value[1] & mask);
1687 if (invert)
1688 val2 = max - val2;
1689 val_mask |= mask << rshift;
1690 val |= val2 << rshift;
1691 }
1692
1693 mutex_lock(&widget->codec->mutex);
1694 widget->value = val;
1695
1696 /* save volume value if the widget is powered down */
1697 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1698 widget->saved_value = val;
1699 mutex_unlock(&widget->codec->mutex);
1700 return 1;
1701 }
1702
1703 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1704 if (widget->event) {
1705 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1706 ret = widget->event(widget, kcontrol,
1707 SND_SOC_DAPM_PRE_REG);
1708 if (ret < 0) {
1709 ret = 1;
1710 goto out;
1711 }
1712 }
1713 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1714 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1715 ret = widget->event(widget, kcontrol,
1716 SND_SOC_DAPM_POST_REG);
1717 } else
1718 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1719
1720 out:
1721 mutex_unlock(&widget->codec->mutex);
1722 return ret;
1723 }
1724 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1725
1726 /**
1727 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1728 * @kcontrol: mixer control
1729 * @ucontrol: control element information
1730 *
1731 * Callback to get the value of a dapm enumerated double mixer control.
1732 *
1733 * Returns 0 for success.
1734 */
1735 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1736 struct snd_ctl_elem_value *ucontrol)
1737 {
1738 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1739 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1740 unsigned int val, bitmask;
1741
1742 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1743 ;
1744 val = snd_soc_read(widget->codec, e->reg);
1745 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1746 if (e->shift_l != e->shift_r)
1747 ucontrol->value.enumerated.item[1] =
1748 (val >> e->shift_r) & (bitmask - 1);
1749
1750 return 0;
1751 }
1752 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1753
1754 /**
1755 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1756 * @kcontrol: mixer control
1757 * @ucontrol: control element information
1758 *
1759 * Callback to set the value of a dapm enumerated double mixer control.
1760 *
1761 * Returns 0 for success.
1762 */
1763 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1764 struct snd_ctl_elem_value *ucontrol)
1765 {
1766 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1767 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1768 unsigned int val, mux, change;
1769 unsigned int mask, bitmask;
1770 int ret = 0;
1771
1772 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1773 ;
1774 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1775 return -EINVAL;
1776 mux = ucontrol->value.enumerated.item[0];
1777 val = mux << e->shift_l;
1778 mask = (bitmask - 1) << e->shift_l;
1779 if (e->shift_l != e->shift_r) {
1780 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1781 return -EINVAL;
1782 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1783 mask |= (bitmask - 1) << e->shift_r;
1784 }
1785
1786 mutex_lock(&widget->codec->mutex);
1787 widget->value = val;
1788 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1789 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1790
1791 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1792 ret = widget->event(widget,
1793 kcontrol, SND_SOC_DAPM_PRE_REG);
1794 if (ret < 0)
1795 goto out;
1796 }
1797
1798 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1799
1800 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1801 ret = widget->event(widget,
1802 kcontrol, SND_SOC_DAPM_POST_REG);
1803
1804 out:
1805 mutex_unlock(&widget->codec->mutex);
1806 return ret;
1807 }
1808 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1809
1810 /**
1811 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1812 * @kcontrol: mixer control
1813 * @ucontrol: control element information
1814 *
1815 * Returns 0 for success.
1816 */
1817 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
1818 struct snd_ctl_elem_value *ucontrol)
1819 {
1820 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1821
1822 ucontrol->value.enumerated.item[0] = widget->value;
1823
1824 return 0;
1825 }
1826 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
1827
1828 /**
1829 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1830 * @kcontrol: mixer control
1831 * @ucontrol: control element information
1832 *
1833 * Returns 0 for success.
1834 */
1835 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
1836 struct snd_ctl_elem_value *ucontrol)
1837 {
1838 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1839 struct soc_enum *e =
1840 (struct soc_enum *)kcontrol->private_value;
1841 int change;
1842 int ret = 0;
1843
1844 if (ucontrol->value.enumerated.item[0] >= e->max)
1845 return -EINVAL;
1846
1847 mutex_lock(&widget->codec->mutex);
1848
1849 change = widget->value != ucontrol->value.enumerated.item[0];
1850 widget->value = ucontrol->value.enumerated.item[0];
1851 dapm_mux_update_power(widget, kcontrol, change, widget->value, e);
1852
1853 mutex_unlock(&widget->codec->mutex);
1854 return ret;
1855 }
1856 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
1857
1858 /**
1859 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1860 * callback
1861 * @kcontrol: mixer control
1862 * @ucontrol: control element information
1863 *
1864 * Callback to get the value of a dapm semi enumerated double mixer control.
1865 *
1866 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1867 * used for handling bitfield coded enumeration for example.
1868 *
1869 * Returns 0 for success.
1870 */
1871 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1872 struct snd_ctl_elem_value *ucontrol)
1873 {
1874 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1875 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1876 unsigned int reg_val, val, mux;
1877
1878 reg_val = snd_soc_read(widget->codec, e->reg);
1879 val = (reg_val >> e->shift_l) & e->mask;
1880 for (mux = 0; mux < e->max; mux++) {
1881 if (val == e->values[mux])
1882 break;
1883 }
1884 ucontrol->value.enumerated.item[0] = mux;
1885 if (e->shift_l != e->shift_r) {
1886 val = (reg_val >> e->shift_r) & e->mask;
1887 for (mux = 0; mux < e->max; mux++) {
1888 if (val == e->values[mux])
1889 break;
1890 }
1891 ucontrol->value.enumerated.item[1] = mux;
1892 }
1893
1894 return 0;
1895 }
1896 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1897
1898 /**
1899 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1900 * callback
1901 * @kcontrol: mixer control
1902 * @ucontrol: control element information
1903 *
1904 * Callback to set the value of a dapm semi enumerated double mixer control.
1905 *
1906 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1907 * used for handling bitfield coded enumeration for example.
1908 *
1909 * Returns 0 for success.
1910 */
1911 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1912 struct snd_ctl_elem_value *ucontrol)
1913 {
1914 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1915 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1916 unsigned int val, mux, change;
1917 unsigned int mask;
1918 int ret = 0;
1919
1920 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1921 return -EINVAL;
1922 mux = ucontrol->value.enumerated.item[0];
1923 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1924 mask = e->mask << e->shift_l;
1925 if (e->shift_l != e->shift_r) {
1926 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1927 return -EINVAL;
1928 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1929 mask |= e->mask << e->shift_r;
1930 }
1931
1932 mutex_lock(&widget->codec->mutex);
1933 widget->value = val;
1934 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1935 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1936
1937 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1938 ret = widget->event(widget,
1939 kcontrol, SND_SOC_DAPM_PRE_REG);
1940 if (ret < 0)
1941 goto out;
1942 }
1943
1944 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1945
1946 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1947 ret = widget->event(widget,
1948 kcontrol, SND_SOC_DAPM_POST_REG);
1949
1950 out:
1951 mutex_unlock(&widget->codec->mutex);
1952 return ret;
1953 }
1954 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1955
1956 /**
1957 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1958 *
1959 * @kcontrol: mixer control
1960 * @uinfo: control element information
1961 *
1962 * Callback to provide information about a pin switch control.
1963 */
1964 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1965 struct snd_ctl_elem_info *uinfo)
1966 {
1967 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1968 uinfo->count = 1;
1969 uinfo->value.integer.min = 0;
1970 uinfo->value.integer.max = 1;
1971
1972 return 0;
1973 }
1974 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1975
1976 /**
1977 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1978 *
1979 * @kcontrol: mixer control
1980 * @ucontrol: Value
1981 */
1982 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1983 struct snd_ctl_elem_value *ucontrol)
1984 {
1985 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1986 const char *pin = (const char *)kcontrol->private_value;
1987
1988 mutex_lock(&codec->mutex);
1989
1990 ucontrol->value.integer.value[0] =
1991 snd_soc_dapm_get_pin_status(codec, pin);
1992
1993 mutex_unlock(&codec->mutex);
1994
1995 return 0;
1996 }
1997 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1998
1999 /**
2000 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2001 *
2002 * @kcontrol: mixer control
2003 * @ucontrol: Value
2004 */
2005 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2006 struct snd_ctl_elem_value *ucontrol)
2007 {
2008 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2009 const char *pin = (const char *)kcontrol->private_value;
2010
2011 mutex_lock(&codec->mutex);
2012
2013 if (ucontrol->value.integer.value[0])
2014 snd_soc_dapm_enable_pin(codec, pin);
2015 else
2016 snd_soc_dapm_disable_pin(codec, pin);
2017
2018 snd_soc_dapm_sync(codec);
2019
2020 mutex_unlock(&codec->mutex);
2021
2022 return 0;
2023 }
2024 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2025
2026 /**
2027 * snd_soc_dapm_new_control - create new dapm control
2028 * @codec: audio codec
2029 * @widget: widget template
2030 *
2031 * Creates a new dapm control based upon the template.
2032 *
2033 * Returns 0 for success else error.
2034 */
2035 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
2036 const struct snd_soc_dapm_widget *widget)
2037 {
2038 struct snd_soc_dapm_widget *w;
2039
2040 if ((w = dapm_cnew_widget(widget)) == NULL)
2041 return -ENOMEM;
2042
2043 w->codec = codec;
2044 INIT_LIST_HEAD(&w->sources);
2045 INIT_LIST_HEAD(&w->sinks);
2046 INIT_LIST_HEAD(&w->list);
2047 list_add(&w->list, &codec->dapm_widgets);
2048
2049 /* machine layer set ups unconnected pins and insertions */
2050 w->connected = 1;
2051 return 0;
2052 }
2053 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2054
2055 /**
2056 * snd_soc_dapm_new_controls - create new dapm controls
2057 * @codec: audio codec
2058 * @widget: widget array
2059 * @num: number of widgets
2060 *
2061 * Creates new DAPM controls based upon the templates.
2062 *
2063 * Returns 0 for success else error.
2064 */
2065 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
2066 const struct snd_soc_dapm_widget *widget,
2067 int num)
2068 {
2069 int i, ret;
2070
2071 for (i = 0; i < num; i++) {
2072 ret = snd_soc_dapm_new_control(codec, widget);
2073 if (ret < 0) {
2074 printk(KERN_ERR
2075 "ASoC: Failed to create DAPM control %s: %d\n",
2076 widget->name, ret);
2077 return ret;
2078 }
2079 widget++;
2080 }
2081 return 0;
2082 }
2083 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2084
2085
2086 /**
2087 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2088 * @codec: audio codec
2089 * @stream: stream name
2090 * @event: stream event
2091 *
2092 * Sends a stream event to the dapm core. The core then makes any
2093 * necessary widget power changes.
2094 *
2095 * Returns 0 for success else error.
2096 */
2097 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
2098 char *stream, int event)
2099 {
2100 struct snd_soc_dapm_widget *w;
2101
2102 if (stream == NULL)
2103 return 0;
2104
2105 mutex_lock(&codec->mutex);
2106 list_for_each_entry(w, &codec->dapm_widgets, list)
2107 {
2108 if (!w->sname)
2109 continue;
2110 pr_debug("widget %s\n %s stream %s event %d\n",
2111 w->name, w->sname, stream, event);
2112 if (strstr(w->sname, stream)) {
2113 switch(event) {
2114 case SND_SOC_DAPM_STREAM_START:
2115 w->active = 1;
2116 break;
2117 case SND_SOC_DAPM_STREAM_STOP:
2118 w->active = 0;
2119 break;
2120 case SND_SOC_DAPM_STREAM_SUSPEND:
2121 if (w->active)
2122 w->suspend = 1;
2123 w->active = 0;
2124 break;
2125 case SND_SOC_DAPM_STREAM_RESUME:
2126 if (w->suspend) {
2127 w->active = 1;
2128 w->suspend = 0;
2129 }
2130 break;
2131 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2132 break;
2133 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2134 break;
2135 }
2136 }
2137 }
2138 mutex_unlock(&codec->mutex);
2139
2140 dapm_power_widgets(codec, event);
2141 dump_dapm(codec, __func__);
2142 return 0;
2143 }
2144 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2145
2146 /**
2147 * snd_soc_dapm_enable_pin - enable pin.
2148 * @codec: SoC codec
2149 * @pin: pin name
2150 *
2151 * Enables input/output pin and its parents or children widgets iff there is
2152 * a valid audio route and active audio stream.
2153 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2154 * do any widget power switching.
2155 */
2156 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
2157 {
2158 return snd_soc_dapm_set_pin(codec, pin, 1);
2159 }
2160 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2161
2162 /**
2163 * snd_soc_dapm_disable_pin - disable pin.
2164 * @codec: SoC codec
2165 * @pin: pin name
2166 *
2167 * Disables input/output pin and its parents or children widgets.
2168 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2169 * do any widget power switching.
2170 */
2171 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
2172 {
2173 return snd_soc_dapm_set_pin(codec, pin, 0);
2174 }
2175 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2176
2177 /**
2178 * snd_soc_dapm_nc_pin - permanently disable pin.
2179 * @codec: SoC codec
2180 * @pin: pin name
2181 *
2182 * Marks the specified pin as being not connected, disabling it along
2183 * any parent or child widgets. At present this is identical to
2184 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2185 * additional things such as disabling controls which only affect
2186 * paths through the pin.
2187 *
2188 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2189 * do any widget power switching.
2190 */
2191 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
2192 {
2193 return snd_soc_dapm_set_pin(codec, pin, 0);
2194 }
2195 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2196
2197 /**
2198 * snd_soc_dapm_get_pin_status - get audio pin status
2199 * @codec: audio codec
2200 * @pin: audio signal pin endpoint (or start point)
2201 *
2202 * Get audio pin status - connected or disconnected.
2203 *
2204 * Returns 1 for connected otherwise 0.
2205 */
2206 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
2207 {
2208 struct snd_soc_dapm_widget *w;
2209
2210 list_for_each_entry(w, &codec->dapm_widgets, list) {
2211 if (!strcmp(w->name, pin))
2212 return w->connected;
2213 }
2214
2215 return 0;
2216 }
2217 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2218
2219 /**
2220 * snd_soc_dapm_free - free dapm resources
2221 * @socdev: SoC device
2222 *
2223 * Free all dapm widgets and resources.
2224 */
2225 void snd_soc_dapm_free(struct snd_soc_device *socdev)
2226 {
2227 struct snd_soc_codec *codec = socdev->card->codec;
2228
2229 snd_soc_dapm_sys_remove(socdev->dev);
2230 dapm_free_widgets(codec);
2231 }
2232 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2233
2234 /*
2235 * snd_soc_dapm_shutdown - callback for system shutdown
2236 */
2237 void snd_soc_dapm_shutdown(struct snd_soc_device *socdev)
2238 {
2239 struct snd_soc_codec *codec = socdev->card->codec;
2240 struct snd_soc_dapm_widget *w;
2241 LIST_HEAD(down_list);
2242 int powerdown = 0;
2243
2244 list_for_each_entry(w, &codec->dapm_widgets, list) {
2245 if (w->power) {
2246 dapm_seq_insert(w, &down_list, dapm_down_seq);
2247 w->power = 0;
2248 powerdown = 1;
2249 }
2250 }
2251
2252 /* If there were no widgets to power down we're already in
2253 * standby.
2254 */
2255 if (powerdown) {
2256 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE);
2257 dapm_seq_run(codec, &down_list, 0, dapm_down_seq);
2258 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY);
2259 }
2260
2261 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF);
2262 }
2263
2264 /* Module information */
2265 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2266 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2267 MODULE_LICENSE("GPL");
mm of the moment repository