Merge commit 'v2.6.30.10' into mini2440-stable-v2.6.30
[linux-2.6/mini2440.git] / sound / soc / soc-dapm.c
blob735903a7467500f4d93d750e527a693d67eabaa2
1 /*
2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
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.
12 * Features:
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
15 * DAC's/ADC's.
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
20 * sinks, dacs, etc
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
22 * device reopen.
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.
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 <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc-dapm.h>
44 #include <sound/initval.h>
46 /* debug */
47 #ifdef DEBUG
48 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
49 #else
50 #define dump_dapm(codec, action)
51 #endif
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq[] = {
55 snd_soc_dapm_pre, snd_soc_dapm_micbias, snd_soc_dapm_mic,
56 snd_soc_dapm_mux, snd_soc_dapm_value_mux, snd_soc_dapm_dac,
57 snd_soc_dapm_mixer, snd_soc_dapm_mixer_named_ctl, snd_soc_dapm_pga,
58 snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk, snd_soc_dapm_post
61 static int dapm_down_seq[] = {
62 snd_soc_dapm_pre, snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk,
63 snd_soc_dapm_pga, snd_soc_dapm_mixer_named_ctl, snd_soc_dapm_mixer,
64 snd_soc_dapm_dac, snd_soc_dapm_mic, snd_soc_dapm_micbias,
65 snd_soc_dapm_mux, snd_soc_dapm_value_mux, snd_soc_dapm_post
68 static int dapm_status = 1;
69 module_param(dapm_status, int, 0);
70 MODULE_PARM_DESC(dapm_status, "enable DPM sysfs entries");
72 static void pop_wait(u32 pop_time)
74 if (pop_time)
75 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
78 static void pop_dbg(u32 pop_time, const char *fmt, ...)
80 va_list args;
82 va_start(args, fmt);
84 if (pop_time) {
85 vprintk(fmt, args);
86 pop_wait(pop_time);
89 va_end(args);
92 /* create a new dapm widget */
93 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
94 const struct snd_soc_dapm_widget *_widget)
96 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
99 /* set up initial codec paths */
100 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
101 struct snd_soc_dapm_path *p, int i)
103 switch (w->id) {
104 case snd_soc_dapm_switch:
105 case snd_soc_dapm_mixer:
106 case snd_soc_dapm_mixer_named_ctl: {
107 int val;
108 struct soc_mixer_control *mc = (struct soc_mixer_control *)
109 w->kcontrols[i].private_value;
110 unsigned int reg = mc->reg;
111 unsigned int shift = mc->shift;
112 int max = mc->max;
113 unsigned int mask = (1 << fls(max)) - 1;
114 unsigned int invert = mc->invert;
116 val = snd_soc_read(w->codec, reg);
117 val = (val >> shift) & mask;
119 if ((invert && !val) || (!invert && val))
120 p->connect = 1;
121 else
122 p->connect = 0;
124 break;
125 case snd_soc_dapm_mux: {
126 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
127 int val, item, bitmask;
129 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
131 val = snd_soc_read(w->codec, e->reg);
132 item = (val >> e->shift_l) & (bitmask - 1);
134 p->connect = 0;
135 for (i = 0; i < e->max; i++) {
136 if (!(strcmp(p->name, e->texts[i])) && item == i)
137 p->connect = 1;
140 break;
141 case snd_soc_dapm_value_mux: {
142 struct soc_enum *e = (struct soc_enum *)
143 w->kcontrols[i].private_value;
144 int val, item;
146 val = snd_soc_read(w->codec, e->reg);
147 val = (val >> e->shift_l) & e->mask;
148 for (item = 0; item < e->max; item++) {
149 if (val == e->values[item])
150 break;
153 p->connect = 0;
154 for (i = 0; i < e->max; i++) {
155 if (!(strcmp(p->name, e->texts[i])) && item == i)
156 p->connect = 1;
159 break;
160 /* does not effect routing - always connected */
161 case snd_soc_dapm_pga:
162 case snd_soc_dapm_output:
163 case snd_soc_dapm_adc:
164 case snd_soc_dapm_input:
165 case snd_soc_dapm_dac:
166 case snd_soc_dapm_micbias:
167 case snd_soc_dapm_vmid:
168 p->connect = 1;
169 break;
170 /* does effect routing - dynamically connected */
171 case snd_soc_dapm_hp:
172 case snd_soc_dapm_mic:
173 case snd_soc_dapm_spk:
174 case snd_soc_dapm_line:
175 case snd_soc_dapm_pre:
176 case snd_soc_dapm_post:
177 p->connect = 0;
178 break;
182 /* connect mux widget to it's interconnecting audio paths */
183 static int dapm_connect_mux(struct snd_soc_codec *codec,
184 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
185 struct snd_soc_dapm_path *path, const char *control_name,
186 const struct snd_kcontrol_new *kcontrol)
188 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
189 int i;
191 for (i = 0; i < e->max; i++) {
192 if (!(strcmp(control_name, e->texts[i]))) {
193 list_add(&path->list, &codec->dapm_paths);
194 list_add(&path->list_sink, &dest->sources);
195 list_add(&path->list_source, &src->sinks);
196 path->name = (char*)e->texts[i];
197 dapm_set_path_status(dest, path, 0);
198 return 0;
202 return -ENODEV;
205 /* connect mixer widget to it's interconnecting audio paths */
206 static int dapm_connect_mixer(struct snd_soc_codec *codec,
207 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
208 struct snd_soc_dapm_path *path, const char *control_name)
210 int i;
212 /* search for mixer kcontrol */
213 for (i = 0; i < dest->num_kcontrols; i++) {
214 if (!strcmp(control_name, dest->kcontrols[i].name)) {
215 list_add(&path->list, &codec->dapm_paths);
216 list_add(&path->list_sink, &dest->sources);
217 list_add(&path->list_source, &src->sinks);
218 path->name = dest->kcontrols[i].name;
219 dapm_set_path_status(dest, path, i);
220 return 0;
223 return -ENODEV;
226 /* update dapm codec register bits */
227 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
229 int change, power;
230 unsigned short old, new;
231 struct snd_soc_codec *codec = widget->codec;
233 /* check for valid widgets */
234 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
235 widget->id == snd_soc_dapm_output ||
236 widget->id == snd_soc_dapm_hp ||
237 widget->id == snd_soc_dapm_mic ||
238 widget->id == snd_soc_dapm_line ||
239 widget->id == snd_soc_dapm_spk)
240 return 0;
242 power = widget->power;
243 if (widget->invert)
244 power = (power ? 0:1);
246 old = snd_soc_read(codec, widget->reg);
247 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
249 change = old != new;
250 if (change) {
251 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
252 widget->name, widget->power ? "on" : "off",
253 codec->pop_time);
254 snd_soc_write(codec, widget->reg, new);
255 pop_wait(codec->pop_time);
257 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
258 old, new, change);
259 return change;
262 /* ramps the volume up or down to minimise pops before or after a
263 * DAPM power event */
264 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
266 const struct snd_kcontrol_new *k = widget->kcontrols;
268 if (widget->muted && !power)
269 return 0;
270 if (!widget->muted && power)
271 return 0;
273 if (widget->num_kcontrols && k) {
274 struct soc_mixer_control *mc =
275 (struct soc_mixer_control *)k->private_value;
276 unsigned int reg = mc->reg;
277 unsigned int shift = mc->shift;
278 int max = mc->max;
279 unsigned int mask = (1 << fls(max)) - 1;
280 unsigned int invert = mc->invert;
282 if (power) {
283 int i;
284 /* power up has happended, increase volume to last level */
285 if (invert) {
286 for (i = max; i > widget->saved_value; i--)
287 snd_soc_update_bits(widget->codec, reg, mask, i);
288 } else {
289 for (i = 0; i < widget->saved_value; i++)
290 snd_soc_update_bits(widget->codec, reg, mask, i);
292 widget->muted = 0;
293 } else {
294 /* power down is about to occur, decrease volume to mute */
295 int val = snd_soc_read(widget->codec, reg);
296 int i = widget->saved_value = (val >> shift) & mask;
297 if (invert) {
298 for (; i < mask; i++)
299 snd_soc_update_bits(widget->codec, reg, mask, i);
300 } else {
301 for (; i > 0; i--)
302 snd_soc_update_bits(widget->codec, reg, mask, i);
304 widget->muted = 1;
307 return 0;
310 /* create new dapm mixer control */
311 static int dapm_new_mixer(struct snd_soc_codec *codec,
312 struct snd_soc_dapm_widget *w)
314 int i, ret = 0;
315 size_t name_len;
316 struct snd_soc_dapm_path *path;
318 /* add kcontrol */
319 for (i = 0; i < w->num_kcontrols; i++) {
321 /* match name */
322 list_for_each_entry(path, &w->sources, list_sink) {
324 /* mixer/mux paths name must match control name */
325 if (path->name != (char*)w->kcontrols[i].name)
326 continue;
328 /* add dapm control with long name.
329 * for dapm_mixer this is the concatenation of the
330 * mixer and kcontrol name.
331 * for dapm_mixer_named_ctl this is simply the
332 * kcontrol name.
334 name_len = strlen(w->kcontrols[i].name) + 1;
335 if (w->id != snd_soc_dapm_mixer_named_ctl)
336 name_len += 1 + strlen(w->name);
338 path->long_name = kmalloc(name_len, GFP_KERNEL);
340 if (path->long_name == NULL)
341 return -ENOMEM;
343 switch (w->id) {
344 default:
345 snprintf(path->long_name, name_len, "%s %s",
346 w->name, w->kcontrols[i].name);
347 break;
348 case snd_soc_dapm_mixer_named_ctl:
349 snprintf(path->long_name, name_len, "%s",
350 w->kcontrols[i].name);
351 break;
354 path->long_name[name_len - 1] = '\0';
356 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
357 path->long_name);
358 ret = snd_ctl_add(codec->card, path->kcontrol);
359 if (ret < 0) {
360 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s\n",
361 path->long_name);
362 kfree(path->long_name);
363 path->long_name = NULL;
364 return ret;
368 return ret;
371 /* create new dapm mux control */
372 static int dapm_new_mux(struct snd_soc_codec *codec,
373 struct snd_soc_dapm_widget *w)
375 struct snd_soc_dapm_path *path = NULL;
376 struct snd_kcontrol *kcontrol;
377 int ret = 0;
379 if (!w->num_kcontrols) {
380 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
381 return -EINVAL;
384 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
385 ret = snd_ctl_add(codec->card, kcontrol);
386 if (ret < 0)
387 goto err;
389 list_for_each_entry(path, &w->sources, list_sink)
390 path->kcontrol = kcontrol;
392 return ret;
394 err:
395 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
396 return ret;
399 /* create new dapm volume control */
400 static int dapm_new_pga(struct snd_soc_codec *codec,
401 struct snd_soc_dapm_widget *w)
403 struct snd_kcontrol *kcontrol;
404 int ret = 0;
406 if (!w->num_kcontrols)
407 return -EINVAL;
409 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
410 ret = snd_ctl_add(codec->card, kcontrol);
411 if (ret < 0) {
412 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
413 return ret;
416 return ret;
419 /* reset 'walked' bit for each dapm path */
420 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
422 struct snd_soc_dapm_path *p;
424 list_for_each_entry(p, &codec->dapm_paths, list)
425 p->walked = 0;
429 * Recursively check for a completed path to an active or physically connected
430 * output widget. Returns number of complete paths.
432 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
434 struct snd_soc_dapm_path *path;
435 int con = 0;
437 if (widget->id == snd_soc_dapm_adc && widget->active)
438 return 1;
440 if (widget->connected) {
441 /* connected pin ? */
442 if (widget->id == snd_soc_dapm_output && !widget->ext)
443 return 1;
445 /* connected jack or spk ? */
446 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
447 widget->id == snd_soc_dapm_line)
448 return 1;
451 list_for_each_entry(path, &widget->sinks, list_source) {
452 if (path->walked)
453 continue;
455 if (path->sink && path->connect) {
456 path->walked = 1;
457 con += is_connected_output_ep(path->sink);
461 return con;
465 * Recursively check for a completed path to an active or physically connected
466 * input widget. Returns number of complete paths.
468 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
470 struct snd_soc_dapm_path *path;
471 int con = 0;
473 /* active stream ? */
474 if (widget->id == snd_soc_dapm_dac && widget->active)
475 return 1;
477 if (widget->connected) {
478 /* connected pin ? */
479 if (widget->id == snd_soc_dapm_input && !widget->ext)
480 return 1;
482 /* connected VMID/Bias for lower pops */
483 if (widget->id == snd_soc_dapm_vmid)
484 return 1;
486 /* connected jack ? */
487 if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line)
488 return 1;
491 list_for_each_entry(path, &widget->sources, list_sink) {
492 if (path->walked)
493 continue;
495 if (path->source && path->connect) {
496 path->walked = 1;
497 con += is_connected_input_ep(path->source);
501 return con;
505 * Handler for generic register modifier widget.
507 int dapm_reg_event(struct snd_soc_dapm_widget *w,
508 struct snd_kcontrol *kcontrol, int event)
510 unsigned int val;
512 if (SND_SOC_DAPM_EVENT_ON(event))
513 val = w->on_val;
514 else
515 val = w->off_val;
517 snd_soc_update_bits(w->codec, -(w->reg + 1),
518 w->mask << w->shift, val << w->shift);
520 return 0;
522 EXPORT_SYMBOL_GPL(dapm_reg_event);
525 * Scan a single DAPM widget for a complete audio path and update the
526 * power status appropriately.
528 static int dapm_power_widget(struct snd_soc_codec *codec, int event,
529 struct snd_soc_dapm_widget *w)
531 int in, out, power_change, power, ret;
533 /* vmid - no action */
534 if (w->id == snd_soc_dapm_vmid)
535 return 0;
537 /* active ADC */
538 if (w->id == snd_soc_dapm_adc && w->active) {
539 in = is_connected_input_ep(w);
540 dapm_clear_walk(w->codec);
541 w->power = (in != 0) ? 1 : 0;
542 dapm_update_bits(w);
543 return 0;
546 /* active DAC */
547 if (w->id == snd_soc_dapm_dac && w->active) {
548 out = is_connected_output_ep(w);
549 dapm_clear_walk(w->codec);
550 w->power = (out != 0) ? 1 : 0;
551 dapm_update_bits(w);
552 return 0;
555 /* pre and post event widgets */
556 if (w->id == snd_soc_dapm_pre) {
557 if (!w->event)
558 return 0;
560 if (event == SND_SOC_DAPM_STREAM_START) {
561 ret = w->event(w,
562 NULL, SND_SOC_DAPM_PRE_PMU);
563 if (ret < 0)
564 return ret;
565 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
566 ret = w->event(w,
567 NULL, SND_SOC_DAPM_PRE_PMD);
568 if (ret < 0)
569 return ret;
571 return 0;
573 if (w->id == snd_soc_dapm_post) {
574 if (!w->event)
575 return 0;
577 if (event == SND_SOC_DAPM_STREAM_START) {
578 ret = w->event(w,
579 NULL, SND_SOC_DAPM_POST_PMU);
580 if (ret < 0)
581 return ret;
582 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
583 ret = w->event(w,
584 NULL, SND_SOC_DAPM_POST_PMD);
585 if (ret < 0)
586 return ret;
588 return 0;
591 /* all other widgets */
592 in = is_connected_input_ep(w);
593 dapm_clear_walk(w->codec);
594 out = is_connected_output_ep(w);
595 dapm_clear_walk(w->codec);
596 power = (out != 0 && in != 0) ? 1 : 0;
597 power_change = (w->power == power) ? 0 : 1;
598 w->power = power;
600 if (!power_change)
601 return 0;
603 /* call any power change event handlers */
604 if (w->event)
605 pr_debug("power %s event for %s flags %x\n",
606 w->power ? "on" : "off",
607 w->name, w->event_flags);
609 /* power up pre event */
610 if (power && w->event &&
611 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
612 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
613 if (ret < 0)
614 return ret;
617 /* power down pre event */
618 if (!power && w->event &&
619 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
620 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
621 if (ret < 0)
622 return ret;
625 /* Lower PGA volume to reduce pops */
626 if (w->id == snd_soc_dapm_pga && !power)
627 dapm_set_pga(w, power);
629 dapm_update_bits(w);
631 /* Raise PGA volume to reduce pops */
632 if (w->id == snd_soc_dapm_pga && power)
633 dapm_set_pga(w, power);
635 /* power up post event */
636 if (power && w->event &&
637 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
638 ret = w->event(w,
639 NULL, SND_SOC_DAPM_POST_PMU);
640 if (ret < 0)
641 return ret;
644 /* power down post event */
645 if (!power && w->event &&
646 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
647 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
648 if (ret < 0)
649 return ret;
652 return 0;
656 * Scan each dapm widget for complete audio path.
657 * A complete path is a route that has valid endpoints i.e.:-
659 * o DAC to output pin.
660 * o Input Pin to ADC.
661 * o Input pin to Output pin (bypass, sidetone)
662 * o DAC to ADC (loopback).
664 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
666 struct snd_soc_dapm_widget *w;
667 int i, c = 1, *seq = NULL, ret = 0;
669 /* do we have a sequenced stream event */
670 if (event == SND_SOC_DAPM_STREAM_START) {
671 c = ARRAY_SIZE(dapm_up_seq);
672 seq = dapm_up_seq;
673 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
674 c = ARRAY_SIZE(dapm_down_seq);
675 seq = dapm_down_seq;
678 for (i = 0; i < c; i++) {
679 list_for_each_entry(w, &codec->dapm_widgets, list) {
681 /* is widget in stream order */
682 if (seq && seq[i] && w->id != seq[i])
683 continue;
685 ret = dapm_power_widget(codec, event, w);
686 if (ret != 0)
687 return ret;
691 return 0;
694 #ifdef DEBUG
695 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
697 struct snd_soc_dapm_widget *w;
698 struct snd_soc_dapm_path *p = NULL;
699 int in, out;
701 printk("DAPM %s %s\n", codec->name, action);
703 list_for_each_entry(w, &codec->dapm_widgets, list) {
705 /* only display widgets that effect routing */
706 switch (w->id) {
707 case snd_soc_dapm_pre:
708 case snd_soc_dapm_post:
709 case snd_soc_dapm_vmid:
710 continue;
711 case snd_soc_dapm_mux:
712 case snd_soc_dapm_value_mux:
713 case snd_soc_dapm_output:
714 case snd_soc_dapm_input:
715 case snd_soc_dapm_switch:
716 case snd_soc_dapm_hp:
717 case snd_soc_dapm_mic:
718 case snd_soc_dapm_spk:
719 case snd_soc_dapm_line:
720 case snd_soc_dapm_micbias:
721 case snd_soc_dapm_dac:
722 case snd_soc_dapm_adc:
723 case snd_soc_dapm_pga:
724 case snd_soc_dapm_mixer:
725 case snd_soc_dapm_mixer_named_ctl:
726 if (w->name) {
727 in = is_connected_input_ep(w);
728 dapm_clear_walk(w->codec);
729 out = is_connected_output_ep(w);
730 dapm_clear_walk(w->codec);
731 printk("%s: %s in %d out %d\n", w->name,
732 w->power ? "On":"Off",in, out);
734 list_for_each_entry(p, &w->sources, list_sink) {
735 if (p->connect)
736 printk(" in %s %s\n", p->name ? p->name : "static",
737 p->source->name);
739 list_for_each_entry(p, &w->sinks, list_source) {
740 if (p->connect)
741 printk(" out %s %s\n", p->name ? p->name : "static",
742 p->sink->name);
745 break;
749 #endif
751 /* test and update the power status of a mux widget */
752 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
753 struct snd_kcontrol *kcontrol, int mask,
754 int mux, int val, struct soc_enum *e)
756 struct snd_soc_dapm_path *path;
757 int found = 0;
759 if (widget->id != snd_soc_dapm_mux &&
760 widget->id != snd_soc_dapm_value_mux)
761 return -ENODEV;
763 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
764 return 0;
766 /* find dapm widget path assoc with kcontrol */
767 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
768 if (path->kcontrol != kcontrol)
769 continue;
771 if (!path->name || !e->texts[mux])
772 continue;
774 found = 1;
775 /* we now need to match the string in the enum to the path */
776 if (!(strcmp(path->name, e->texts[mux])))
777 path->connect = 1; /* new connection */
778 else
779 path->connect = 0; /* old connection must be powered down */
782 if (found) {
783 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
784 dump_dapm(widget->codec, "mux power update");
787 return 0;
790 /* test and update the power status of a mixer or switch widget */
791 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
792 struct snd_kcontrol *kcontrol, int reg,
793 int val_mask, int val, int invert)
795 struct snd_soc_dapm_path *path;
796 int found = 0;
798 if (widget->id != snd_soc_dapm_mixer &&
799 widget->id != snd_soc_dapm_mixer_named_ctl &&
800 widget->id != snd_soc_dapm_switch)
801 return -ENODEV;
803 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
804 return 0;
806 /* find dapm widget path assoc with kcontrol */
807 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
808 if (path->kcontrol != kcontrol)
809 continue;
811 /* found, now check type */
812 found = 1;
813 if (val)
814 /* new connection */
815 path->connect = invert ? 0:1;
816 else
817 /* old connection must be powered down */
818 path->connect = invert ? 1:0;
819 break;
822 if (found) {
823 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
824 dump_dapm(widget->codec, "mixer power update");
827 return 0;
830 /* show dapm widget status in sys fs */
831 static ssize_t dapm_widget_show(struct device *dev,
832 struct device_attribute *attr, char *buf)
834 struct snd_soc_device *devdata = dev_get_drvdata(dev);
835 struct snd_soc_codec *codec = devdata->card->codec;
836 struct snd_soc_dapm_widget *w;
837 int count = 0;
838 char *state = "not set";
840 list_for_each_entry(w, &codec->dapm_widgets, list) {
842 /* only display widgets that burnm power */
843 switch (w->id) {
844 case snd_soc_dapm_hp:
845 case snd_soc_dapm_mic:
846 case snd_soc_dapm_spk:
847 case snd_soc_dapm_line:
848 case snd_soc_dapm_micbias:
849 case snd_soc_dapm_dac:
850 case snd_soc_dapm_adc:
851 case snd_soc_dapm_pga:
852 case snd_soc_dapm_mixer:
853 case snd_soc_dapm_mixer_named_ctl:
854 if (w->name)
855 count += sprintf(buf + count, "%s: %s\n",
856 w->name, w->power ? "On":"Off");
857 break;
858 default:
859 break;
863 switch (codec->bias_level) {
864 case SND_SOC_BIAS_ON:
865 state = "On";
866 break;
867 case SND_SOC_BIAS_PREPARE:
868 state = "Prepare";
869 break;
870 case SND_SOC_BIAS_STANDBY:
871 state = "Standby";
872 break;
873 case SND_SOC_BIAS_OFF:
874 state = "Off";
875 break;
877 count += sprintf(buf + count, "PM State: %s\n", state);
879 return count;
882 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
884 int snd_soc_dapm_sys_add(struct device *dev)
886 if (!dapm_status)
887 return 0;
888 return device_create_file(dev, &dev_attr_dapm_widget);
891 static void snd_soc_dapm_sys_remove(struct device *dev)
893 if (dapm_status) {
894 device_remove_file(dev, &dev_attr_dapm_widget);
898 /* free all dapm widgets and resources */
899 static void dapm_free_widgets(struct snd_soc_codec *codec)
901 struct snd_soc_dapm_widget *w, *next_w;
902 struct snd_soc_dapm_path *p, *next_p;
904 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
905 list_del(&w->list);
906 kfree(w);
909 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
910 list_del(&p->list);
911 kfree(p->long_name);
912 kfree(p);
916 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
917 const char *pin, int status)
919 struct snd_soc_dapm_widget *w;
921 list_for_each_entry(w, &codec->dapm_widgets, list) {
922 if (!strcmp(w->name, pin)) {
923 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
924 w->connected = status;
925 return 0;
929 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
930 return -EINVAL;
934 * snd_soc_dapm_sync - scan and power dapm paths
935 * @codec: audio codec
937 * Walks all dapm audio paths and powers widgets according to their
938 * stream or path usage.
940 * Returns 0 for success.
942 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
944 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
945 dump_dapm(codec, "sync");
946 return ret;
948 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
950 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
951 const char *sink, const char *control, const char *source)
953 struct snd_soc_dapm_path *path;
954 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
955 int ret = 0;
957 /* find src and dest widgets */
958 list_for_each_entry(w, &codec->dapm_widgets, list) {
960 if (!wsink && !(strcmp(w->name, sink))) {
961 wsink = w;
962 continue;
964 if (!wsource && !(strcmp(w->name, source))) {
965 wsource = w;
969 if (wsource == NULL || wsink == NULL)
970 return -ENODEV;
972 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
973 if (!path)
974 return -ENOMEM;
976 path->source = wsource;
977 path->sink = wsink;
978 INIT_LIST_HEAD(&path->list);
979 INIT_LIST_HEAD(&path->list_source);
980 INIT_LIST_HEAD(&path->list_sink);
982 /* check for external widgets */
983 if (wsink->id == snd_soc_dapm_input) {
984 if (wsource->id == snd_soc_dapm_micbias ||
985 wsource->id == snd_soc_dapm_mic ||
986 wsink->id == snd_soc_dapm_line ||
987 wsink->id == snd_soc_dapm_output)
988 wsink->ext = 1;
990 if (wsource->id == snd_soc_dapm_output) {
991 if (wsink->id == snd_soc_dapm_spk ||
992 wsink->id == snd_soc_dapm_hp ||
993 wsink->id == snd_soc_dapm_line ||
994 wsink->id == snd_soc_dapm_input)
995 wsource->ext = 1;
998 /* connect static paths */
999 if (control == NULL) {
1000 list_add(&path->list, &codec->dapm_paths);
1001 list_add(&path->list_sink, &wsink->sources);
1002 list_add(&path->list_source, &wsource->sinks);
1003 path->connect = 1;
1004 return 0;
1007 /* connect dynamic paths */
1008 switch(wsink->id) {
1009 case snd_soc_dapm_adc:
1010 case snd_soc_dapm_dac:
1011 case snd_soc_dapm_pga:
1012 case snd_soc_dapm_input:
1013 case snd_soc_dapm_output:
1014 case snd_soc_dapm_micbias:
1015 case snd_soc_dapm_vmid:
1016 case snd_soc_dapm_pre:
1017 case snd_soc_dapm_post:
1018 list_add(&path->list, &codec->dapm_paths);
1019 list_add(&path->list_sink, &wsink->sources);
1020 list_add(&path->list_source, &wsource->sinks);
1021 path->connect = 1;
1022 return 0;
1023 case snd_soc_dapm_mux:
1024 case snd_soc_dapm_value_mux:
1025 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1026 &wsink->kcontrols[0]);
1027 if (ret != 0)
1028 goto err;
1029 break;
1030 case snd_soc_dapm_switch:
1031 case snd_soc_dapm_mixer:
1032 case snd_soc_dapm_mixer_named_ctl:
1033 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1034 if (ret != 0)
1035 goto err;
1036 break;
1037 case snd_soc_dapm_hp:
1038 case snd_soc_dapm_mic:
1039 case snd_soc_dapm_line:
1040 case snd_soc_dapm_spk:
1041 list_add(&path->list, &codec->dapm_paths);
1042 list_add(&path->list_sink, &wsink->sources);
1043 list_add(&path->list_source, &wsource->sinks);
1044 path->connect = 0;
1045 return 0;
1047 return 0;
1049 err:
1050 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1051 control, sink);
1052 kfree(path);
1053 return ret;
1057 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1058 * @codec: codec
1059 * @route: audio routes
1060 * @num: number of routes
1062 * Connects 2 dapm widgets together via a named audio path. The sink is
1063 * the widget receiving the audio signal, whilst the source is the sender
1064 * of the audio signal.
1066 * Returns 0 for success else error. On error all resources can be freed
1067 * with a call to snd_soc_card_free().
1069 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1070 const struct snd_soc_dapm_route *route, int num)
1072 int i, ret;
1074 for (i = 0; i < num; i++) {
1075 ret = snd_soc_dapm_add_route(codec, route->sink,
1076 route->control, route->source);
1077 if (ret < 0) {
1078 printk(KERN_ERR "Failed to add route %s->%s\n",
1079 route->source,
1080 route->sink);
1081 return ret;
1083 route++;
1086 return 0;
1088 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1091 * snd_soc_dapm_new_widgets - add new dapm widgets
1092 * @codec: audio codec
1094 * Checks the codec for any new dapm widgets and creates them if found.
1096 * Returns 0 for success.
1098 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1100 struct snd_soc_dapm_widget *w;
1102 list_for_each_entry(w, &codec->dapm_widgets, list)
1104 if (w->new)
1105 continue;
1107 switch(w->id) {
1108 case snd_soc_dapm_switch:
1109 case snd_soc_dapm_mixer:
1110 case snd_soc_dapm_mixer_named_ctl:
1111 dapm_new_mixer(codec, w);
1112 break;
1113 case snd_soc_dapm_mux:
1114 case snd_soc_dapm_value_mux:
1115 dapm_new_mux(codec, w);
1116 break;
1117 case snd_soc_dapm_adc:
1118 case snd_soc_dapm_dac:
1119 case snd_soc_dapm_pga:
1120 dapm_new_pga(codec, w);
1121 break;
1122 case snd_soc_dapm_input:
1123 case snd_soc_dapm_output:
1124 case snd_soc_dapm_micbias:
1125 case snd_soc_dapm_spk:
1126 case snd_soc_dapm_hp:
1127 case snd_soc_dapm_mic:
1128 case snd_soc_dapm_line:
1129 case snd_soc_dapm_vmid:
1130 case snd_soc_dapm_pre:
1131 case snd_soc_dapm_post:
1132 break;
1134 w->new = 1;
1137 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1138 return 0;
1140 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1143 * snd_soc_dapm_get_volsw - dapm mixer get callback
1144 * @kcontrol: mixer control
1145 * @ucontrol: control element information
1147 * Callback to get the value of a dapm mixer control.
1149 * Returns 0 for success.
1151 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1152 struct snd_ctl_elem_value *ucontrol)
1154 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1155 struct soc_mixer_control *mc =
1156 (struct soc_mixer_control *)kcontrol->private_value;
1157 unsigned int reg = mc->reg;
1158 unsigned int shift = mc->shift;
1159 unsigned int rshift = mc->rshift;
1160 int max = mc->max;
1161 unsigned int invert = mc->invert;
1162 unsigned int mask = (1 << fls(max)) - 1;
1164 /* return the saved value if we are powered down */
1165 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1166 ucontrol->value.integer.value[0] = widget->saved_value;
1167 return 0;
1170 ucontrol->value.integer.value[0] =
1171 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1172 if (shift != rshift)
1173 ucontrol->value.integer.value[1] =
1174 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1175 if (invert) {
1176 ucontrol->value.integer.value[0] =
1177 max - ucontrol->value.integer.value[0];
1178 if (shift != rshift)
1179 ucontrol->value.integer.value[1] =
1180 max - ucontrol->value.integer.value[1];
1183 return 0;
1185 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1188 * snd_soc_dapm_put_volsw - dapm mixer set callback
1189 * @kcontrol: mixer control
1190 * @ucontrol: control element information
1192 * Callback to set the value of a dapm mixer control.
1194 * Returns 0 for success.
1196 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1197 struct snd_ctl_elem_value *ucontrol)
1199 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1200 struct soc_mixer_control *mc =
1201 (struct soc_mixer_control *)kcontrol->private_value;
1202 unsigned int reg = mc->reg;
1203 unsigned int shift = mc->shift;
1204 unsigned int rshift = mc->rshift;
1205 int max = mc->max;
1206 unsigned int mask = (1 << fls(max)) - 1;
1207 unsigned int invert = mc->invert;
1208 unsigned short val, val2, val_mask;
1209 int ret;
1211 val = (ucontrol->value.integer.value[0] & mask);
1213 if (invert)
1214 val = max - val;
1215 val_mask = mask << shift;
1216 val = val << shift;
1217 if (shift != rshift) {
1218 val2 = (ucontrol->value.integer.value[1] & mask);
1219 if (invert)
1220 val2 = max - val2;
1221 val_mask |= mask << rshift;
1222 val |= val2 << rshift;
1225 mutex_lock(&widget->codec->mutex);
1226 widget->value = val;
1228 /* save volume value if the widget is powered down */
1229 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1230 widget->saved_value = val;
1231 mutex_unlock(&widget->codec->mutex);
1232 return 1;
1235 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1236 if (widget->event) {
1237 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1238 ret = widget->event(widget, kcontrol,
1239 SND_SOC_DAPM_PRE_REG);
1240 if (ret < 0) {
1241 ret = 1;
1242 goto out;
1245 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1246 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1247 ret = widget->event(widget, kcontrol,
1248 SND_SOC_DAPM_POST_REG);
1249 } else
1250 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1252 out:
1253 mutex_unlock(&widget->codec->mutex);
1254 return ret;
1256 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1259 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1260 * @kcontrol: mixer control
1261 * @ucontrol: control element information
1263 * Callback to get the value of a dapm enumerated double mixer control.
1265 * Returns 0 for success.
1267 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1268 struct snd_ctl_elem_value *ucontrol)
1270 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1271 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1272 unsigned short val, bitmask;
1274 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1276 val = snd_soc_read(widget->codec, e->reg);
1277 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1278 if (e->shift_l != e->shift_r)
1279 ucontrol->value.enumerated.item[1] =
1280 (val >> e->shift_r) & (bitmask - 1);
1282 return 0;
1284 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1287 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1288 * @kcontrol: mixer control
1289 * @ucontrol: control element information
1291 * Callback to set the value of a dapm enumerated double mixer control.
1293 * Returns 0 for success.
1295 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1296 struct snd_ctl_elem_value *ucontrol)
1298 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1299 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1300 unsigned short val, mux;
1301 unsigned short mask, bitmask;
1302 int ret = 0;
1304 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1306 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1307 return -EINVAL;
1308 mux = ucontrol->value.enumerated.item[0];
1309 val = mux << e->shift_l;
1310 mask = (bitmask - 1) << e->shift_l;
1311 if (e->shift_l != e->shift_r) {
1312 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1313 return -EINVAL;
1314 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1315 mask |= (bitmask - 1) << e->shift_r;
1318 mutex_lock(&widget->codec->mutex);
1319 widget->value = val;
1320 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1321 if (widget->event) {
1322 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1323 ret = widget->event(widget,
1324 kcontrol, SND_SOC_DAPM_PRE_REG);
1325 if (ret < 0)
1326 goto out;
1328 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1329 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1330 ret = widget->event(widget,
1331 kcontrol, SND_SOC_DAPM_POST_REG);
1332 } else
1333 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1335 out:
1336 mutex_unlock(&widget->codec->mutex);
1337 return ret;
1339 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1342 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1343 * callback
1344 * @kcontrol: mixer control
1345 * @ucontrol: control element information
1347 * Callback to get the value of a dapm semi enumerated double mixer control.
1349 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1350 * used for handling bitfield coded enumeration for example.
1352 * Returns 0 for success.
1354 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1355 struct snd_ctl_elem_value *ucontrol)
1357 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1358 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1359 unsigned short reg_val, val, mux;
1361 reg_val = snd_soc_read(widget->codec, e->reg);
1362 val = (reg_val >> e->shift_l) & e->mask;
1363 for (mux = 0; mux < e->max; mux++) {
1364 if (val == e->values[mux])
1365 break;
1367 ucontrol->value.enumerated.item[0] = mux;
1368 if (e->shift_l != e->shift_r) {
1369 val = (reg_val >> e->shift_r) & e->mask;
1370 for (mux = 0; mux < e->max; mux++) {
1371 if (val == e->values[mux])
1372 break;
1374 ucontrol->value.enumerated.item[1] = mux;
1377 return 0;
1379 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1382 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1383 * callback
1384 * @kcontrol: mixer control
1385 * @ucontrol: control element information
1387 * Callback to set the value of a dapm semi enumerated double mixer control.
1389 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1390 * used for handling bitfield coded enumeration for example.
1392 * Returns 0 for success.
1394 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1395 struct snd_ctl_elem_value *ucontrol)
1397 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1398 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1399 unsigned short val, mux;
1400 unsigned short mask;
1401 int ret = 0;
1403 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1404 return -EINVAL;
1405 mux = ucontrol->value.enumerated.item[0];
1406 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1407 mask = e->mask << e->shift_l;
1408 if (e->shift_l != e->shift_r) {
1409 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1410 return -EINVAL;
1411 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1412 mask |= e->mask << e->shift_r;
1415 mutex_lock(&widget->codec->mutex);
1416 widget->value = val;
1417 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1418 if (widget->event) {
1419 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1420 ret = widget->event(widget,
1421 kcontrol, SND_SOC_DAPM_PRE_REG);
1422 if (ret < 0)
1423 goto out;
1425 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1426 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1427 ret = widget->event(widget,
1428 kcontrol, SND_SOC_DAPM_POST_REG);
1429 } else
1430 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1432 out:
1433 mutex_unlock(&widget->codec->mutex);
1434 return ret;
1436 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1439 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1441 * @kcontrol: mixer control
1442 * @uinfo: control element information
1444 * Callback to provide information about a pin switch control.
1446 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1447 struct snd_ctl_elem_info *uinfo)
1449 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1450 uinfo->count = 1;
1451 uinfo->value.integer.min = 0;
1452 uinfo->value.integer.max = 1;
1454 return 0;
1456 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1459 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1461 * @kcontrol: mixer control
1462 * @ucontrol: Value
1464 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1465 struct snd_ctl_elem_value *ucontrol)
1467 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1468 const char *pin = (const char *)kcontrol->private_value;
1470 mutex_lock(&codec->mutex);
1472 ucontrol->value.integer.value[0] =
1473 snd_soc_dapm_get_pin_status(codec, pin);
1475 mutex_unlock(&codec->mutex);
1477 return 0;
1479 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1482 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1484 * @kcontrol: mixer control
1485 * @ucontrol: Value
1487 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
1488 struct snd_ctl_elem_value *ucontrol)
1490 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1491 const char *pin = (const char *)kcontrol->private_value;
1493 mutex_lock(&codec->mutex);
1495 if (ucontrol->value.integer.value[0])
1496 snd_soc_dapm_enable_pin(codec, pin);
1497 else
1498 snd_soc_dapm_disable_pin(codec, pin);
1500 snd_soc_dapm_sync(codec);
1502 mutex_unlock(&codec->mutex);
1504 return 0;
1506 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
1509 * snd_soc_dapm_new_control - create new dapm control
1510 * @codec: audio codec
1511 * @widget: widget template
1513 * Creates a new dapm control based upon the template.
1515 * Returns 0 for success else error.
1517 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1518 const struct snd_soc_dapm_widget *widget)
1520 struct snd_soc_dapm_widget *w;
1522 if ((w = dapm_cnew_widget(widget)) == NULL)
1523 return -ENOMEM;
1525 w->codec = codec;
1526 INIT_LIST_HEAD(&w->sources);
1527 INIT_LIST_HEAD(&w->sinks);
1528 INIT_LIST_HEAD(&w->list);
1529 list_add(&w->list, &codec->dapm_widgets);
1531 /* machine layer set ups unconnected pins and insertions */
1532 w->connected = 1;
1533 return 0;
1535 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1538 * snd_soc_dapm_new_controls - create new dapm controls
1539 * @codec: audio codec
1540 * @widget: widget array
1541 * @num: number of widgets
1543 * Creates new DAPM controls based upon the templates.
1545 * Returns 0 for success else error.
1547 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1548 const struct snd_soc_dapm_widget *widget,
1549 int num)
1551 int i, ret;
1553 for (i = 0; i < num; i++) {
1554 ret = snd_soc_dapm_new_control(codec, widget);
1555 if (ret < 0) {
1556 printk(KERN_ERR
1557 "ASoC: Failed to create DAPM control %s: %d\n",
1558 widget->name, ret);
1559 return ret;
1561 widget++;
1563 return 0;
1565 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1569 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1570 * @codec: audio codec
1571 * @stream: stream name
1572 * @event: stream event
1574 * Sends a stream event to the dapm core. The core then makes any
1575 * necessary widget power changes.
1577 * Returns 0 for success else error.
1579 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1580 char *stream, int event)
1582 struct snd_soc_dapm_widget *w;
1584 if (stream == NULL)
1585 return 0;
1587 mutex_lock(&codec->mutex);
1588 list_for_each_entry(w, &codec->dapm_widgets, list)
1590 if (!w->sname)
1591 continue;
1592 pr_debug("widget %s\n %s stream %s event %d\n",
1593 w->name, w->sname, stream, event);
1594 if (strstr(w->sname, stream)) {
1595 switch(event) {
1596 case SND_SOC_DAPM_STREAM_START:
1597 w->active = 1;
1598 break;
1599 case SND_SOC_DAPM_STREAM_STOP:
1600 w->active = 0;
1601 break;
1602 case SND_SOC_DAPM_STREAM_SUSPEND:
1603 if (w->active)
1604 w->suspend = 1;
1605 w->active = 0;
1606 break;
1607 case SND_SOC_DAPM_STREAM_RESUME:
1608 if (w->suspend) {
1609 w->active = 1;
1610 w->suspend = 0;
1612 break;
1613 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
1614 break;
1615 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
1616 break;
1620 mutex_unlock(&codec->mutex);
1622 dapm_power_widgets(codec, event);
1623 dump_dapm(codec, __func__);
1624 return 0;
1626 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
1629 * snd_soc_dapm_set_bias_level - set the bias level for the system
1630 * @socdev: audio device
1631 * @level: level to configure
1633 * Configure the bias (power) levels for the SoC audio device.
1635 * Returns 0 for success else error.
1637 int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
1638 enum snd_soc_bias_level level)
1640 struct snd_soc_card *card = socdev->card;
1641 struct snd_soc_codec *codec = socdev->card->codec;
1642 int ret = 0;
1644 if (card->set_bias_level)
1645 ret = card->set_bias_level(card, level);
1646 if (ret == 0 && codec->set_bias_level)
1647 ret = codec->set_bias_level(codec, level);
1649 return ret;
1653 * snd_soc_dapm_enable_pin - enable pin.
1654 * @codec: SoC codec
1655 * @pin: pin name
1657 * Enables input/output pin and it's parents or children widgets iff there is
1658 * a valid audio route and active audio stream.
1659 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1660 * do any widget power switching.
1662 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
1664 return snd_soc_dapm_set_pin(codec, pin, 1);
1666 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
1669 * snd_soc_dapm_disable_pin - disable pin.
1670 * @codec: SoC codec
1671 * @pin: pin name
1673 * Disables input/output pin and it's parents or children widgets.
1674 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1675 * do any widget power switching.
1677 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
1679 return snd_soc_dapm_set_pin(codec, pin, 0);
1681 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
1684 * snd_soc_dapm_nc_pin - permanently disable pin.
1685 * @codec: SoC codec
1686 * @pin: pin name
1688 * Marks the specified pin as being not connected, disabling it along
1689 * any parent or child widgets. At present this is identical to
1690 * snd_soc_dapm_disable_pin() but in future it will be extended to do
1691 * additional things such as disabling controls which only affect
1692 * paths through the pin.
1694 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1695 * do any widget power switching.
1697 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
1699 return snd_soc_dapm_set_pin(codec, pin, 0);
1701 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
1704 * snd_soc_dapm_get_pin_status - get audio pin status
1705 * @codec: audio codec
1706 * @pin: audio signal pin endpoint (or start point)
1708 * Get audio pin status - connected or disconnected.
1710 * Returns 1 for connected otherwise 0.
1712 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
1714 struct snd_soc_dapm_widget *w;
1716 list_for_each_entry(w, &codec->dapm_widgets, list) {
1717 if (!strcmp(w->name, pin))
1718 return w->connected;
1721 return 0;
1723 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
1726 * snd_soc_dapm_free - free dapm resources
1727 * @socdev: SoC device
1729 * Free all dapm widgets and resources.
1731 void snd_soc_dapm_free(struct snd_soc_device *socdev)
1733 struct snd_soc_codec *codec = socdev->card->codec;
1735 snd_soc_dapm_sys_remove(socdev->dev);
1736 dapm_free_widgets(codec);
1738 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
1740 /* Module information */
1741 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
1742 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1743 MODULE_LICENSE("GPL");