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Fix gcc 4.5.1 miscompiling drivers/char/i8k.c (again)
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / sound / soc / soc-dapm.c
blob0d294ef7259006e0681a9b1bb2092c608fde1925
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 /* If we're suspending then pull down all the
981 * power. */
982 switch (event) {
983 case SND_SOC_DAPM_STREAM_SUSPEND:
984 power = 0;
985 break;
986
987 default:
988 power = w->power_check(w);
989 if (power)
990 sys_power = 1;
991 break;
992 }
993
994 if (w->power == power)
995 continue;
996
997 if (power)
998 dapm_seq_insert(w, &up_list, dapm_up_seq);
999 else
1000 dapm_seq_insert(w, &down_list, dapm_down_seq);
1001
1002 w->power = power;
1003 break;
1004 }
1005 }
1006
1007 /* If there are no DAPM widgets then try to figure out power from the
1008 * event type.
1009 */
1010 if (list_empty(&codec->dapm_widgets)) {
1011 switch (event) {
1012 case SND_SOC_DAPM_STREAM_START:
1013 case SND_SOC_DAPM_STREAM_RESUME:
1014 sys_power = 1;
1015 break;
1016 case SND_SOC_DAPM_STREAM_SUSPEND:
1017 sys_power = 0;
1018 break;
1019 case SND_SOC_DAPM_STREAM_NOP:
1020 sys_power = codec->bias_level != SND_SOC_BIAS_STANDBY;
1021 break;
1022 default:
1023 break;
1024 }
1025 }
1026
1027 /* If we're changing to all on or all off then prepare */
1028 if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
1029 (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {
1030 ret = snd_soc_dapm_set_bias_level(socdev,
1031 SND_SOC_BIAS_PREPARE);
1032 if (ret != 0)
1033 pr_err("Failed to prepare bias: %d\n", ret);
1034 }
1035
1036 /* Power down widgets first; try to avoid amplifying pops. */
1037 dapm_seq_run(codec, &down_list, event, dapm_down_seq);
1038
1039 /* Now power up. */
1040 dapm_seq_run(codec, &up_list, event, dapm_up_seq);
1041
1042 /* If we just powered the last thing off drop to standby bias */
1043 if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
1044 ret = snd_soc_dapm_set_bias_level(socdev,
1045 SND_SOC_BIAS_STANDBY);
1046 if (ret != 0)
1047 pr_err("Failed to apply standby bias: %d\n", ret);
1048 }
1049
1050 /* If we just powered up then move to active bias */
1051 if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
1052 ret = snd_soc_dapm_set_bias_level(socdev,
1053 SND_SOC_BIAS_ON);
1054 if (ret != 0)
1055 pr_err("Failed to apply active bias: %d\n", ret);
1056 }
1057
1058 pop_dbg(codec->pop_time, "DAPM sequencing finished, waiting %dms\n",
1059 codec->pop_time);
1060
1061 return 0;
1062 }
1063
1064 #ifdef DEBUG
1065 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
1066 {
1067 struct snd_soc_dapm_widget *w;
1068 struct snd_soc_dapm_path *p = NULL;
1069 int in, out;
1070
1071 printk("DAPM %s %s\n", codec->name, action);
1072
1073 list_for_each_entry(w, &codec->dapm_widgets, list) {
1074
1075 /* only display widgets that effect routing */
1076 switch (w->id) {
1077 case snd_soc_dapm_pre:
1078 case snd_soc_dapm_post:
1079 case snd_soc_dapm_vmid:
1080 continue;
1081 case snd_soc_dapm_mux:
1082 case snd_soc_dapm_value_mux:
1083 case snd_soc_dapm_output:
1084 case snd_soc_dapm_input:
1085 case snd_soc_dapm_switch:
1086 case snd_soc_dapm_hp:
1087 case snd_soc_dapm_mic:
1088 case snd_soc_dapm_spk:
1089 case snd_soc_dapm_line:
1090 case snd_soc_dapm_micbias:
1091 case snd_soc_dapm_dac:
1092 case snd_soc_dapm_adc:
1093 case snd_soc_dapm_pga:
1094 case snd_soc_dapm_mixer:
1095 case snd_soc_dapm_mixer_named_ctl:
1096 case snd_soc_dapm_supply:
1097 case snd_soc_dapm_aif_in:
1098 case snd_soc_dapm_aif_out:
1099 if (w->name) {
1100 in = is_connected_input_ep(w);
1101 dapm_clear_walk(w->codec);
1102 out = is_connected_output_ep(w);
1103 dapm_clear_walk(w->codec);
1104 printk("%s: %s in %d out %d\n", w->name,
1105 w->power ? "On":"Off",in, out);
1106
1107 list_for_each_entry(p, &w->sources, list_sink) {
1108 if (p->connect)
1109 printk(" in %s %s\n", p->name ? p->name : "static",
1110 p->source->name);
1111 }
1112 list_for_each_entry(p, &w->sinks, list_source) {
1113 if (p->connect)
1114 printk(" out %s %s\n", p->name ? p->name : "static",
1115 p->sink->name);
1116 }
1117 }
1118 break;
1119 }
1120 }
1121 }
1122 #endif
1123
1124 #ifdef CONFIG_DEBUG_FS
1125 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1126 {
1127 file->private_data = inode->i_private;
1128 return 0;
1129 }
1130
1131 static ssize_t dapm_widget_power_read_file(struct file *file,
1132 char __user *user_buf,
1133 size_t count, loff_t *ppos)
1134 {
1135 struct snd_soc_dapm_widget *w = file->private_data;
1136 char *buf;
1137 int in, out;
1138 ssize_t ret;
1139 struct snd_soc_dapm_path *p = NULL;
1140
1141 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1142 if (!buf)
1143 return -ENOMEM;
1144
1145 in = is_connected_input_ep(w);
1146 dapm_clear_walk(w->codec);
1147 out = is_connected_output_ep(w);
1148 dapm_clear_walk(w->codec);
1149
1150 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d\n",
1151 w->name, w->power ? "On" : "Off", in, out);
1152
1153 if (w->sname)
1154 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1155 w->sname,
1156 w->active ? "active" : "inactive");
1157
1158 list_for_each_entry(p, &w->sources, list_sink) {
1159 if (p->connected && !p->connected(w, p->sink))
1160 continue;
1161
1162 if (p->connect)
1163 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1164 " in %s %s\n",
1165 p->name ? p->name : "static",
1166 p->source->name);
1167 }
1168 list_for_each_entry(p, &w->sinks, list_source) {
1169 if (p->connected && !p->connected(w, p->sink))
1170 continue;
1171
1172 if (p->connect)
1173 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1174 " out %s %s\n",
1175 p->name ? p->name : "static",
1176 p->sink->name);
1177 }
1178
1179 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1180
1181 kfree(buf);
1182 return ret;
1183 }
1184
1185 static const struct file_operations dapm_widget_power_fops = {
1186 .open = dapm_widget_power_open_file,
1187 .read = dapm_widget_power_read_file,
1188 };
1189
1190 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1191 {
1192 struct snd_soc_dapm_widget *w;
1193 struct dentry *d;
1194
1195 if (!codec->debugfs_dapm)
1196 return;
1197
1198 list_for_each_entry(w, &codec->dapm_widgets, list) {
1199 if (!w->name)
1200 continue;
1201
1202 d = debugfs_create_file(w->name, 0444,
1203 codec->debugfs_dapm, w,
1204 &dapm_widget_power_fops);
1205 if (!d)
1206 printk(KERN_WARNING
1207 "ASoC: Failed to create %s debugfs file\n",
1208 w->name);
1209 }
1210 }
1211 #else
1212 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1213 {
1214 }
1215 #endif
1216
1217 /* test and update the power status of a mux widget */
1218 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1219 struct snd_kcontrol *kcontrol, int change,
1220 int mux, struct soc_enum *e)
1221 {
1222 struct snd_soc_dapm_path *path;
1223 int found = 0;
1224
1225 if (widget->id != snd_soc_dapm_mux &&
1226 widget->id != snd_soc_dapm_value_mux)
1227 return -ENODEV;
1228
1229 if (!change)
1230 return 0;
1231
1232 /* find dapm widget path assoc with kcontrol */
1233 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1234 if (path->kcontrol != kcontrol)
1235 continue;
1236
1237 if (!path->name || !e->texts[mux])
1238 continue;
1239
1240 found = 1;
1241 /* we now need to match the string in the enum to the path */
1242 if (!(strcmp(path->name, e->texts[mux])))
1243 path->connect = 1; /* new connection */
1244 else
1245 path->connect = 0; /* old connection must be powered down */
1246 }
1247
1248 if (found) {
1249 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1250 dump_dapm(widget->codec, "mux power update");
1251 }
1252
1253 return 0;
1254 }
1255
1256 /* test and update the power status of a mixer or switch widget */
1257 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1258 struct snd_kcontrol *kcontrol, int reg,
1259 int val_mask, int val, int invert)
1260 {
1261 struct snd_soc_dapm_path *path;
1262 int found = 0;
1263
1264 if (widget->id != snd_soc_dapm_mixer &&
1265 widget->id != snd_soc_dapm_mixer_named_ctl &&
1266 widget->id != snd_soc_dapm_switch)
1267 return -ENODEV;
1268
1269 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
1270 return 0;
1271
1272 /* find dapm widget path assoc with kcontrol */
1273 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1274 if (path->kcontrol != kcontrol)
1275 continue;
1276
1277 /* found, now check type */
1278 found = 1;
1279 if (val)
1280 /* new connection */
1281 path->connect = invert ? 0:1;
1282 else
1283 /* old connection must be powered down */
1284 path->connect = invert ? 1:0;
1285 break;
1286 }
1287
1288 if (found) {
1289 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1290 dump_dapm(widget->codec, "mixer power update");
1291 }
1292
1293 return 0;
1294 }
1295
1296 /* show dapm widget status in sys fs */
1297 static ssize_t dapm_widget_show(struct device *dev,
1298 struct device_attribute *attr, char *buf)
1299 {
1300 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1301 struct snd_soc_codec *codec = devdata->card->codec;
1302 struct snd_soc_dapm_widget *w;
1303 int count = 0;
1304 char *state = "not set";
1305
1306 list_for_each_entry(w, &codec->dapm_widgets, list) {
1307
1308 /* only display widgets that burnm power */
1309 switch (w->id) {
1310 case snd_soc_dapm_hp:
1311 case snd_soc_dapm_mic:
1312 case snd_soc_dapm_spk:
1313 case snd_soc_dapm_line:
1314 case snd_soc_dapm_micbias:
1315 case snd_soc_dapm_dac:
1316 case snd_soc_dapm_adc:
1317 case snd_soc_dapm_pga:
1318 case snd_soc_dapm_mixer:
1319 case snd_soc_dapm_mixer_named_ctl:
1320 case snd_soc_dapm_supply:
1321 if (w->name)
1322 count += sprintf(buf + count, "%s: %s\n",
1323 w->name, w->power ? "On":"Off");
1324 break;
1325 default:
1326 break;
1327 }
1328 }
1329
1330 switch (codec->bias_level) {
1331 case SND_SOC_BIAS_ON:
1332 state = "On";
1333 break;
1334 case SND_SOC_BIAS_PREPARE:
1335 state = "Prepare";
1336 break;
1337 case SND_SOC_BIAS_STANDBY:
1338 state = "Standby";
1339 break;
1340 case SND_SOC_BIAS_OFF:
1341 state = "Off";
1342 break;
1343 }
1344 count += sprintf(buf + count, "PM State: %s\n", state);
1345
1346 return count;
1347 }
1348
1349 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1350
1351 int snd_soc_dapm_sys_add(struct device *dev)
1352 {
1353 return device_create_file(dev, &dev_attr_dapm_widget);
1354 }
1355
1356 static void snd_soc_dapm_sys_remove(struct device *dev)
1357 {
1358 device_remove_file(dev, &dev_attr_dapm_widget);
1359 }
1360
1361 /* free all dapm widgets and resources */
1362 static void dapm_free_widgets(struct snd_soc_codec *codec)
1363 {
1364 struct snd_soc_dapm_widget *w, *next_w;
1365 struct snd_soc_dapm_path *p, *next_p;
1366
1367 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
1368 list_del(&w->list);
1369 kfree(w);
1370 }
1371
1372 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
1373 list_del(&p->list);
1374 kfree(p->long_name);
1375 kfree(p);
1376 }
1377 }
1378
1379 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
1380 const char *pin, int status)
1381 {
1382 struct snd_soc_dapm_widget *w;
1383
1384 list_for_each_entry(w, &codec->dapm_widgets, list) {
1385 if (!strcmp(w->name, pin)) {
1386 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
1387 w->connected = status;
1388 return 0;
1389 }
1390 }
1391
1392 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
1393 return -EINVAL;
1394 }
1395
1396 /**
1397 * snd_soc_dapm_sync - scan and power dapm paths
1398 * @codec: audio codec
1399 *
1400 * Walks all dapm audio paths and powers widgets according to their
1401 * stream or path usage.
1402 *
1403 * Returns 0 for success.
1404 */
1405 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
1406 {
1407 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1408 dump_dapm(codec, "sync");
1409 return ret;
1410 }
1411 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1412
1413 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
1414 const struct snd_soc_dapm_route *route)
1415 {
1416 struct snd_soc_dapm_path *path;
1417 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1418 const char *sink = route->sink;
1419 const char *control = route->control;
1420 const char *source = route->source;
1421 int ret = 0;
1422
1423 /* find src and dest widgets */
1424 list_for_each_entry(w, &codec->dapm_widgets, list) {
1425
1426 if (!wsink && !(strcmp(w->name, sink))) {
1427 wsink = w;
1428 continue;
1429 }
1430 if (!wsource && !(strcmp(w->name, source))) {
1431 wsource = w;
1432 }
1433 }
1434
1435 if (wsource == NULL || wsink == NULL)
1436 return -ENODEV;
1437
1438 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1439 if (!path)
1440 return -ENOMEM;
1441
1442 path->source = wsource;
1443 path->sink = wsink;
1444 path->connected = route->connected;
1445 INIT_LIST_HEAD(&path->list);
1446 INIT_LIST_HEAD(&path->list_source);
1447 INIT_LIST_HEAD(&path->list_sink);
1448
1449 /* check for external widgets */
1450 if (wsink->id == snd_soc_dapm_input) {
1451 if (wsource->id == snd_soc_dapm_micbias ||
1452 wsource->id == snd_soc_dapm_mic ||
1453 wsource->id == snd_soc_dapm_line ||
1454 wsource->id == snd_soc_dapm_output)
1455 wsink->ext = 1;
1456 }
1457 if (wsource->id == snd_soc_dapm_output) {
1458 if (wsink->id == snd_soc_dapm_spk ||
1459 wsink->id == snd_soc_dapm_hp ||
1460 wsink->id == snd_soc_dapm_line ||
1461 wsink->id == snd_soc_dapm_input)
1462 wsource->ext = 1;
1463 }
1464
1465 /* connect static paths */
1466 if (control == NULL) {
1467 list_add(&path->list, &codec->dapm_paths);
1468 list_add(&path->list_sink, &wsink->sources);
1469 list_add(&path->list_source, &wsource->sinks);
1470 path->connect = 1;
1471 return 0;
1472 }
1473
1474 /* connect dynamic paths */
1475 switch(wsink->id) {
1476 case snd_soc_dapm_adc:
1477 case snd_soc_dapm_dac:
1478 case snd_soc_dapm_pga:
1479 case snd_soc_dapm_input:
1480 case snd_soc_dapm_output:
1481 case snd_soc_dapm_micbias:
1482 case snd_soc_dapm_vmid:
1483 case snd_soc_dapm_pre:
1484 case snd_soc_dapm_post:
1485 case snd_soc_dapm_supply:
1486 case snd_soc_dapm_aif_in:
1487 case snd_soc_dapm_aif_out:
1488 list_add(&path->list, &codec->dapm_paths);
1489 list_add(&path->list_sink, &wsink->sources);
1490 list_add(&path->list_source, &wsource->sinks);
1491 path->connect = 1;
1492 return 0;
1493 case snd_soc_dapm_mux:
1494 case snd_soc_dapm_value_mux:
1495 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1496 &wsink->kcontrols[0]);
1497 if (ret != 0)
1498 goto err;
1499 break;
1500 case snd_soc_dapm_switch:
1501 case snd_soc_dapm_mixer:
1502 case snd_soc_dapm_mixer_named_ctl:
1503 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1504 if (ret != 0)
1505 goto err;
1506 break;
1507 case snd_soc_dapm_hp:
1508 case snd_soc_dapm_mic:
1509 case snd_soc_dapm_line:
1510 case snd_soc_dapm_spk:
1511 list_add(&path->list, &codec->dapm_paths);
1512 list_add(&path->list_sink, &wsink->sources);
1513 list_add(&path->list_source, &wsource->sinks);
1514 path->connect = 0;
1515 return 0;
1516 }
1517 return 0;
1518
1519 err:
1520 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1521 control, sink);
1522 kfree(path);
1523 return ret;
1524 }
1525
1526 /**
1527 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1528 * @codec: codec
1529 * @route: audio routes
1530 * @num: number of routes
1531 *
1532 * Connects 2 dapm widgets together via a named audio path. The sink is
1533 * the widget receiving the audio signal, whilst the source is the sender
1534 * of the audio signal.
1535 *
1536 * Returns 0 for success else error. On error all resources can be freed
1537 * with a call to snd_soc_card_free().
1538 */
1539 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1540 const struct snd_soc_dapm_route *route, int num)
1541 {
1542 int i, ret;
1543
1544 for (i = 0; i < num; i++) {
1545 ret = snd_soc_dapm_add_route(codec, route);
1546 if (ret < 0) {
1547 printk(KERN_ERR "Failed to add route %s->%s\n",
1548 route->source,
1549 route->sink);
1550 return ret;
1551 }
1552 route++;
1553 }
1554
1555 return 0;
1556 }
1557 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1558
1559 /**
1560 * snd_soc_dapm_new_widgets - add new dapm widgets
1561 * @codec: audio codec
1562 *
1563 * Checks the codec for any new dapm widgets and creates them if found.
1564 *
1565 * Returns 0 for success.
1566 */
1567 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1568 {
1569 struct snd_soc_dapm_widget *w;
1570
1571 list_for_each_entry(w, &codec->dapm_widgets, list)
1572 {
1573 if (w->new)
1574 continue;
1575
1576 switch(w->id) {
1577 case snd_soc_dapm_switch:
1578 case snd_soc_dapm_mixer:
1579 case snd_soc_dapm_mixer_named_ctl:
1580 w->power_check = dapm_generic_check_power;
1581 dapm_new_mixer(codec, w);
1582 break;
1583 case snd_soc_dapm_mux:
1584 case snd_soc_dapm_value_mux:
1585 w->power_check = dapm_generic_check_power;
1586 dapm_new_mux(codec, w);
1587 break;
1588 case snd_soc_dapm_adc:
1589 case snd_soc_dapm_aif_out:
1590 w->power_check = dapm_adc_check_power;
1591 break;
1592 case snd_soc_dapm_dac:
1593 case snd_soc_dapm_aif_in:
1594 w->power_check = dapm_dac_check_power;
1595 break;
1596 case snd_soc_dapm_pga:
1597 w->power_check = dapm_generic_check_power;
1598 dapm_new_pga(codec, w);
1599 break;
1600 case snd_soc_dapm_input:
1601 case snd_soc_dapm_output:
1602 case snd_soc_dapm_micbias:
1603 case snd_soc_dapm_spk:
1604 case snd_soc_dapm_hp:
1605 case snd_soc_dapm_mic:
1606 case snd_soc_dapm_line:
1607 w->power_check = dapm_generic_check_power;
1608 break;
1609 case snd_soc_dapm_supply:
1610 w->power_check = dapm_supply_check_power;
1611 case snd_soc_dapm_vmid:
1612 case snd_soc_dapm_pre:
1613 case snd_soc_dapm_post:
1614 break;
1615 }
1616 w->new = 1;
1617 }
1618
1619 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1620 return 0;
1621 }
1622 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1623
1624 /**
1625 * snd_soc_dapm_get_volsw - dapm mixer get callback
1626 * @kcontrol: mixer control
1627 * @ucontrol: control element information
1628 *
1629 * Callback to get the value of a dapm mixer control.
1630 *
1631 * Returns 0 for success.
1632 */
1633 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1634 struct snd_ctl_elem_value *ucontrol)
1635 {
1636 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1637 struct soc_mixer_control *mc =
1638 (struct soc_mixer_control *)kcontrol->private_value;
1639 unsigned int reg = mc->reg;
1640 unsigned int shift = mc->shift;
1641 unsigned int rshift = mc->rshift;
1642 int max = mc->max;
1643 unsigned int invert = mc->invert;
1644 unsigned int mask = (1 << fls(max)) - 1;
1645
1646 /* return the saved value if we are powered down */
1647 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1648 ucontrol->value.integer.value[0] = widget->saved_value;
1649 return 0;
1650 }
1651
1652 ucontrol->value.integer.value[0] =
1653 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1654 if (shift != rshift)
1655 ucontrol->value.integer.value[1] =
1656 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1657 if (invert) {
1658 ucontrol->value.integer.value[0] =
1659 max - ucontrol->value.integer.value[0];
1660 if (shift != rshift)
1661 ucontrol->value.integer.value[1] =
1662 max - ucontrol->value.integer.value[1];
1663 }
1664
1665 return 0;
1666 }
1667 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1668
1669 /**
1670 * snd_soc_dapm_put_volsw - dapm mixer set callback
1671 * @kcontrol: mixer control
1672 * @ucontrol: control element information
1673 *
1674 * Callback to set the value of a dapm mixer control.
1675 *
1676 * Returns 0 for success.
1677 */
1678 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1679 struct snd_ctl_elem_value *ucontrol)
1680 {
1681 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1682 struct soc_mixer_control *mc =
1683 (struct soc_mixer_control *)kcontrol->private_value;
1684 unsigned int reg = mc->reg;
1685 unsigned int shift = mc->shift;
1686 unsigned int rshift = mc->rshift;
1687 int max = mc->max;
1688 unsigned int mask = (1 << fls(max)) - 1;
1689 unsigned int invert = mc->invert;
1690 unsigned int val, val2, val_mask;
1691 int ret;
1692
1693 val = (ucontrol->value.integer.value[0] & mask);
1694
1695 if (invert)
1696 val = max - val;
1697 val_mask = mask << shift;
1698 val = val << shift;
1699 if (shift != rshift) {
1700 val2 = (ucontrol->value.integer.value[1] & mask);
1701 if (invert)
1702 val2 = max - val2;
1703 val_mask |= mask << rshift;
1704 val |= val2 << rshift;
1705 }
1706
1707 mutex_lock(&widget->codec->mutex);
1708 widget->value = val;
1709
1710 /* save volume value if the widget is powered down */
1711 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1712 widget->saved_value = val;
1713 mutex_unlock(&widget->codec->mutex);
1714 return 1;
1715 }
1716
1717 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1718 if (widget->event) {
1719 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1720 ret = widget->event(widget, kcontrol,
1721 SND_SOC_DAPM_PRE_REG);
1722 if (ret < 0) {
1723 ret = 1;
1724 goto out;
1725 }
1726 }
1727 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1728 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1729 ret = widget->event(widget, kcontrol,
1730 SND_SOC_DAPM_POST_REG);
1731 } else
1732 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1733
1734 out:
1735 mutex_unlock(&widget->codec->mutex);
1736 return ret;
1737 }
1738 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1739
1740 /**
1741 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1742 * @kcontrol: mixer control
1743 * @ucontrol: control element information
1744 *
1745 * Callback to get the value of a dapm enumerated double mixer control.
1746 *
1747 * Returns 0 for success.
1748 */
1749 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1750 struct snd_ctl_elem_value *ucontrol)
1751 {
1752 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1753 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1754 unsigned int val, bitmask;
1755
1756 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1757 ;
1758 val = snd_soc_read(widget->codec, e->reg);
1759 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1760 if (e->shift_l != e->shift_r)
1761 ucontrol->value.enumerated.item[1] =
1762 (val >> e->shift_r) & (bitmask - 1);
1763
1764 return 0;
1765 }
1766 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1767
1768 /**
1769 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1770 * @kcontrol: mixer control
1771 * @ucontrol: control element information
1772 *
1773 * Callback to set the value of a dapm enumerated double mixer control.
1774 *
1775 * Returns 0 for success.
1776 */
1777 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1778 struct snd_ctl_elem_value *ucontrol)
1779 {
1780 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1781 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1782 unsigned int val, mux, change;
1783 unsigned int mask, bitmask;
1784 int ret = 0;
1785
1786 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1787 ;
1788 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1789 return -EINVAL;
1790 mux = ucontrol->value.enumerated.item[0];
1791 val = mux << e->shift_l;
1792 mask = (bitmask - 1) << e->shift_l;
1793 if (e->shift_l != e->shift_r) {
1794 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1795 return -EINVAL;
1796 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1797 mask |= (bitmask - 1) << e->shift_r;
1798 }
1799
1800 mutex_lock(&widget->codec->mutex);
1801 widget->value = val;
1802 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1803 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1804
1805 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1806 ret = widget->event(widget,
1807 kcontrol, SND_SOC_DAPM_PRE_REG);
1808 if (ret < 0)
1809 goto out;
1810 }
1811
1812 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1813
1814 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1815 ret = widget->event(widget,
1816 kcontrol, SND_SOC_DAPM_POST_REG);
1817
1818 out:
1819 mutex_unlock(&widget->codec->mutex);
1820 return ret;
1821 }
1822 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1823
1824 /**
1825 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1826 * @kcontrol: mixer control
1827 * @ucontrol: control element information
1828 *
1829 * Returns 0 for success.
1830 */
1831 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
1832 struct snd_ctl_elem_value *ucontrol)
1833 {
1834 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1835
1836 ucontrol->value.enumerated.item[0] = widget->value;
1837
1838 return 0;
1839 }
1840 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
1841
1842 /**
1843 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1844 * @kcontrol: mixer control
1845 * @ucontrol: control element information
1846 *
1847 * Returns 0 for success.
1848 */
1849 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
1850 struct snd_ctl_elem_value *ucontrol)
1851 {
1852 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1853 struct soc_enum *e =
1854 (struct soc_enum *)kcontrol->private_value;
1855 int change;
1856 int ret = 0;
1857
1858 if (ucontrol->value.enumerated.item[0] >= e->max)
1859 return -EINVAL;
1860
1861 mutex_lock(&widget->codec->mutex);
1862
1863 change = widget->value != ucontrol->value.enumerated.item[0];
1864 widget->value = ucontrol->value.enumerated.item[0];
1865 dapm_mux_update_power(widget, kcontrol, change, widget->value, e);
1866
1867 mutex_unlock(&widget->codec->mutex);
1868 return ret;
1869 }
1870 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
1871
1872 /**
1873 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1874 * callback
1875 * @kcontrol: mixer control
1876 * @ucontrol: control element information
1877 *
1878 * Callback to get the value of a dapm semi enumerated double mixer control.
1879 *
1880 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1881 * used for handling bitfield coded enumeration for example.
1882 *
1883 * Returns 0 for success.
1884 */
1885 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1886 struct snd_ctl_elem_value *ucontrol)
1887 {
1888 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1889 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1890 unsigned int reg_val, val, mux;
1891
1892 reg_val = snd_soc_read(widget->codec, e->reg);
1893 val = (reg_val >> e->shift_l) & e->mask;
1894 for (mux = 0; mux < e->max; mux++) {
1895 if (val == e->values[mux])
1896 break;
1897 }
1898 ucontrol->value.enumerated.item[0] = mux;
1899 if (e->shift_l != e->shift_r) {
1900 val = (reg_val >> e->shift_r) & e->mask;
1901 for (mux = 0; mux < e->max; mux++) {
1902 if (val == e->values[mux])
1903 break;
1904 }
1905 ucontrol->value.enumerated.item[1] = mux;
1906 }
1907
1908 return 0;
1909 }
1910 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1911
1912 /**
1913 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1914 * callback
1915 * @kcontrol: mixer control
1916 * @ucontrol: control element information
1917 *
1918 * Callback to set the value of a dapm semi enumerated double mixer control.
1919 *
1920 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1921 * used for handling bitfield coded enumeration for example.
1922 *
1923 * Returns 0 for success.
1924 */
1925 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1926 struct snd_ctl_elem_value *ucontrol)
1927 {
1928 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1929 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1930 unsigned int val, mux, change;
1931 unsigned int mask;
1932 int ret = 0;
1933
1934 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1935 return -EINVAL;
1936 mux = ucontrol->value.enumerated.item[0];
1937 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1938 mask = e->mask << e->shift_l;
1939 if (e->shift_l != e->shift_r) {
1940 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1941 return -EINVAL;
1942 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1943 mask |= e->mask << e->shift_r;
1944 }
1945
1946 mutex_lock(&widget->codec->mutex);
1947 widget->value = val;
1948 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1949 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1950
1951 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1952 ret = widget->event(widget,
1953 kcontrol, SND_SOC_DAPM_PRE_REG);
1954 if (ret < 0)
1955 goto out;
1956 }
1957
1958 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1959
1960 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1961 ret = widget->event(widget,
1962 kcontrol, SND_SOC_DAPM_POST_REG);
1963
1964 out:
1965 mutex_unlock(&widget->codec->mutex);
1966 return ret;
1967 }
1968 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1969
1970 /**
1971 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1972 *
1973 * @kcontrol: mixer control
1974 * @uinfo: control element information
1975 *
1976 * Callback to provide information about a pin switch control.
1977 */
1978 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1979 struct snd_ctl_elem_info *uinfo)
1980 {
1981 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1982 uinfo->count = 1;
1983 uinfo->value.integer.min = 0;
1984 uinfo->value.integer.max = 1;
1985
1986 return 0;
1987 }
1988 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1989
1990 /**
1991 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1992 *
1993 * @kcontrol: mixer control
1994 * @ucontrol: Value
1995 */
1996 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1997 struct snd_ctl_elem_value *ucontrol)
1998 {
1999 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2000 const char *pin = (const char *)kcontrol->private_value;
2001
2002 mutex_lock(&codec->mutex);
2003
2004 ucontrol->value.integer.value[0] =
2005 snd_soc_dapm_get_pin_status(codec, pin);
2006
2007 mutex_unlock(&codec->mutex);
2008
2009 return 0;
2010 }
2011 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2012
2013 /**
2014 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2015 *
2016 * @kcontrol: mixer control
2017 * @ucontrol: Value
2018 */
2019 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2020 struct snd_ctl_elem_value *ucontrol)
2021 {
2022 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2023 const char *pin = (const char *)kcontrol->private_value;
2024
2025 mutex_lock(&codec->mutex);
2026
2027 if (ucontrol->value.integer.value[0])
2028 snd_soc_dapm_enable_pin(codec, pin);
2029 else
2030 snd_soc_dapm_disable_pin(codec, pin);
2031
2032 snd_soc_dapm_sync(codec);
2033
2034 mutex_unlock(&codec->mutex);
2035
2036 return 0;
2037 }
2038 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2039
2040 /**
2041 * snd_soc_dapm_new_control - create new dapm control
2042 * @codec: audio codec
2043 * @widget: widget template
2044 *
2045 * Creates a new dapm control based upon the template.
2046 *
2047 * Returns 0 for success else error.
2048 */
2049 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
2050 const struct snd_soc_dapm_widget *widget)
2051 {
2052 struct snd_soc_dapm_widget *w;
2053
2054 if ((w = dapm_cnew_widget(widget)) == NULL)
2055 return -ENOMEM;
2056
2057 w->codec = codec;
2058 INIT_LIST_HEAD(&w->sources);
2059 INIT_LIST_HEAD(&w->sinks);
2060 INIT_LIST_HEAD(&w->list);
2061 list_add(&w->list, &codec->dapm_widgets);
2062
2063 /* machine layer set ups unconnected pins and insertions */
2064 w->connected = 1;
2065 return 0;
2066 }
2067 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2068
2069 /**
2070 * snd_soc_dapm_new_controls - create new dapm controls
2071 * @codec: audio codec
2072 * @widget: widget array
2073 * @num: number of widgets
2074 *
2075 * Creates new DAPM controls based upon the templates.
2076 *
2077 * Returns 0 for success else error.
2078 */
2079 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
2080 const struct snd_soc_dapm_widget *widget,
2081 int num)
2082 {
2083 int i, ret;
2084
2085 for (i = 0; i < num; i++) {
2086 ret = snd_soc_dapm_new_control(codec, widget);
2087 if (ret < 0) {
2088 printk(KERN_ERR
2089 "ASoC: Failed to create DAPM control %s: %d\n",
2090 widget->name, ret);
2091 return ret;
2092 }
2093 widget++;
2094 }
2095 return 0;
2096 }
2097 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2098
2099
2100 /**
2101 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2102 * @codec: audio codec
2103 * @stream: stream name
2104 * @event: stream event
2105 *
2106 * Sends a stream event to the dapm core. The core then makes any
2107 * necessary widget power changes.
2108 *
2109 * Returns 0 for success else error.
2110 */
2111 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
2112 char *stream, int event)
2113 {
2114 struct snd_soc_dapm_widget *w;
2115
2116 if (stream == NULL)
2117 return 0;
2118
2119 mutex_lock(&codec->mutex);
2120 list_for_each_entry(w, &codec->dapm_widgets, list)
2121 {
2122 if (!w->sname)
2123 continue;
2124 pr_debug("widget %s\n %s stream %s event %d\n",
2125 w->name, w->sname, stream, event);
2126 if (strstr(w->sname, stream)) {
2127 switch(event) {
2128 case SND_SOC_DAPM_STREAM_START:
2129 w->active = 1;
2130 break;
2131 case SND_SOC_DAPM_STREAM_STOP:
2132 w->active = 0;
2133 break;
2134 case SND_SOC_DAPM_STREAM_SUSPEND:
2135 if (w->active)
2136 w->suspend = 1;
2137 w->active = 0;
2138 break;
2139 case SND_SOC_DAPM_STREAM_RESUME:
2140 if (w->suspend) {
2141 w->active = 1;
2142 w->suspend = 0;
2143 }
2144 break;
2145 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2146 break;
2147 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2148 break;
2149 }
2150 }
2151 }
2152
2153 dapm_power_widgets(codec, event);
2154 mutex_unlock(&codec->mutex);
2155 dump_dapm(codec, __func__);
2156 return 0;
2157 }
2158 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2159
2160 /**
2161 * snd_soc_dapm_enable_pin - enable pin.
2162 * @codec: SoC codec
2163 * @pin: pin name
2164 *
2165 * Enables input/output pin and its parents or children widgets iff there is
2166 * a valid audio route and active audio stream.
2167 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2168 * do any widget power switching.
2169 */
2170 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
2171 {
2172 return snd_soc_dapm_set_pin(codec, pin, 1);
2173 }
2174 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2175
2176 /**
2177 * snd_soc_dapm_disable_pin - disable pin.
2178 * @codec: SoC codec
2179 * @pin: pin name
2180 *
2181 * Disables input/output pin and its parents or children widgets.
2182 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2183 * do any widget power switching.
2184 */
2185 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
2186 {
2187 return snd_soc_dapm_set_pin(codec, pin, 0);
2188 }
2189 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2190
2191 /**
2192 * snd_soc_dapm_nc_pin - permanently disable pin.
2193 * @codec: SoC codec
2194 * @pin: pin name
2195 *
2196 * Marks the specified pin as being not connected, disabling it along
2197 * any parent or child widgets. At present this is identical to
2198 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2199 * additional things such as disabling controls which only affect
2200 * paths through the pin.
2201 *
2202 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2203 * do any widget power switching.
2204 */
2205 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
2206 {
2207 return snd_soc_dapm_set_pin(codec, pin, 0);
2208 }
2209 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2210
2211 /**
2212 * snd_soc_dapm_get_pin_status - get audio pin status
2213 * @codec: audio codec
2214 * @pin: audio signal pin endpoint (or start point)
2215 *
2216 * Get audio pin status - connected or disconnected.
2217 *
2218 * Returns 1 for connected otherwise 0.
2219 */
2220 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
2221 {
2222 struct snd_soc_dapm_widget *w;
2223
2224 list_for_each_entry(w, &codec->dapm_widgets, list) {
2225 if (!strcmp(w->name, pin))
2226 return w->connected;
2227 }
2228
2229 return 0;
2230 }
2231 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2232
2233 /**
2234 * snd_soc_dapm_free - free dapm resources
2235 * @socdev: SoC device
2236 *
2237 * Free all dapm widgets and resources.
2238 */
2239 void snd_soc_dapm_free(struct snd_soc_device *socdev)
2240 {
2241 struct snd_soc_codec *codec = socdev->card->codec;
2242
2243 snd_soc_dapm_sys_remove(socdev->dev);
2244 dapm_free_widgets(codec);
2245 }
2246 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2247
2248 /*
2249 * snd_soc_dapm_shutdown - callback for system shutdown
2250 */
2251 void snd_soc_dapm_shutdown(struct snd_soc_device *socdev)
2252 {
2253 struct snd_soc_codec *codec = socdev->card->codec;
2254 struct snd_soc_dapm_widget *w;
2255 LIST_HEAD(down_list);
2256 int powerdown = 0;
2257
2258 list_for_each_entry(w, &codec->dapm_widgets, list) {
2259 if (w->power) {
2260 dapm_seq_insert(w, &down_list, dapm_down_seq);
2261 w->power = 0;
2262 powerdown = 1;
2263 }
2264 }
2265
2266 /* If there were no widgets to power down we're already in
2267 * standby.
2268 */
2269 if (powerdown) {
2270 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE);
2271 dapm_seq_run(codec, &down_list, 0, dapm_down_seq);
2272 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY);
2273 }
2274
2275 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF);
2276 }
2277
2278 /* Module information */
2279 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2280 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2281 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree