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[ALSA] sound/soc/soc-dapm.c: make 4 functions static
[deliverable/linux.git] / sound / soc / soc-dapm.c
CommitLineData
2b97eabc
RP		 1/*
2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood
6 * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 * Revision history
14 * 12th Aug 2005 Initial version.
15 * 25th Oct 2005 Implemented path power domain.
16 * 18th Dec 2005 Implemented machine and stream level power domain.
17 *
18 * Features:
19 * o Changes power status of internal codec blocks depending on the
20 * dynamic configuration of codec internal audio paths and active
21 * DAC's/ADC's.
22 * o Platform power domain - can support external components i.e. amps and
23 * mic/meadphone insertion events.
24 * o Automatic Mic Bias support
25 * o Jack insertion power event initiation - e.g. hp insertion will enable
26 * sinks, dacs, etc
27 * o Delayed powerdown of audio susbsytem to reduce pops between a quick
28 * device reopen.
29 *
30 * Todo:
31 * o DAPM power change sequencing - allow for configurable per
32 * codec sequences.
33 * o Support for analogue bias optimisation.
34 * o Support for reduced codec oversampling rates.
35 * o Support for reduced codec bias currents.
36 */
37
38#include <linux/module.h>
39#include <linux/moduleparam.h>
40#include <linux/init.h>
41#include <linux/delay.h>
42#include <linux/pm.h>
43#include <linux/bitops.h>
44#include <linux/platform_device.h>
45#include <linux/jiffies.h>
46#include <sound/driver.h>
47#include <sound/core.h>
48#include <sound/pcm.h>
49#include <sound/pcm_params.h>
50#include <sound/soc-dapm.h>
51#include <sound/initval.h>
52
53/* debug */
54#define DAPM_DEBUG 0
55#if DAPM_DEBUG
56#define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
57#define dbg(format, arg...) printk(format, ## arg)
58#else
59#define dump_dapm(codec, action)
60#define dbg(format, arg...)
61#endif
62
63#define POP_DEBUG 0
64#if POP_DEBUG
65#define POP_TIME 500 /* 500 msecs - change if pop debug is too fast */
66#define pop_wait(time) schedule_timeout_interruptible(msecs_to_jiffies(time))
67#define pop_dbg(format, arg...) printk(format, ## arg); pop_wait(POP_TIME)
68#else
69#define pop_dbg(format, arg...)
70#define pop_wait(time)
71#endif
72
73/* dapm power sequences - make this per codec in the future */
74static int dapm_up_seq[] = {
75 snd_soc_dapm_pre, snd_soc_dapm_micbias, snd_soc_dapm_mic,
76 snd_soc_dapm_mux, snd_soc_dapm_dac, snd_soc_dapm_mixer, snd_soc_dapm_pga,
77 snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk, snd_soc_dapm_post
78};
79static int dapm_down_seq[] = {
80 snd_soc_dapm_pre, snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk,
81 snd_soc_dapm_pga, snd_soc_dapm_mixer, snd_soc_dapm_dac, snd_soc_dapm_mic,
82 snd_soc_dapm_micbias, snd_soc_dapm_mux, snd_soc_dapm_post
83};
84
85static int dapm_status = 1;
86module_param(dapm_status, int, 0);
87MODULE_PARM_DESC(dapm_status, "enable DPM sysfs entries");
88
89/* create a new dapm widget */
90static struct snd_soc_dapm_widget *dapm_cnew_widget(
91 const struct snd_soc_dapm_widget *_widget)
92{
93 struct snd_soc_dapm_widget* widget;
94 widget = kmalloc(sizeof(struct snd_soc_dapm_widget), GFP_KERNEL);
95 if (!widget)
96 return NULL;
97
98 memcpy(widget, _widget, sizeof(struct snd_soc_dapm_widget));
99 return widget;
100}
101
102/* set up initial codec paths */
103static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
104 struct snd_soc_dapm_path *p, int i)
105{
106 switch (w->id) {
107 case snd_soc_dapm_switch:
108 case snd_soc_dapm_mixer: {
109 int val;
110 int reg = w->kcontrols[i].private_value & 0xff;
111 int shift = (w->kcontrols[i].private_value >> 8) & 0x0f;
112 int mask = (w->kcontrols[i].private_value >> 16) & 0xff;
113 int invert = (w->kcontrols[i].private_value >> 24) & 0x01;
114
115 val = snd_soc_read(w->codec, reg);
116 val = (val >> shift) & mask;
117
118 if ((invert && !val) || (!invert && val))
119 p->connect = 1;
120 else
121 p->connect = 0;
122 }
123 break;
124 case snd_soc_dapm_mux: {
125 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
126 int val, item, bitmask;
127
128 for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
129 ;
130 val = snd_soc_read(w->codec, e->reg);
131 item = (val >> e->shift_l) & (bitmask - 1);
132
133 p->connect = 0;
134 for (i = 0; i < e->mask; i++) {
135 if (!(strcmp(p->name, e->texts[i])) && item == i)
136 p->connect = 1;
137 }
138 }
139 break;
140 /* does not effect routing - always connected */
141 case snd_soc_dapm_pga:
142 case snd_soc_dapm_output:
143 case snd_soc_dapm_adc:
144 case snd_soc_dapm_input:
145 case snd_soc_dapm_dac:
146 case snd_soc_dapm_micbias:
147 case snd_soc_dapm_vmid:
148 p->connect = 1;
149 break;
150 /* does effect routing - dynamically connected */
151 case snd_soc_dapm_hp:
152 case snd_soc_dapm_mic:
153 case snd_soc_dapm_spk:
154 case snd_soc_dapm_line:
155 case snd_soc_dapm_pre:
156 case snd_soc_dapm_post:
157 p->connect = 0;
158 break;
159 }
160}
161
162/* connect mux widget to it's interconnecting audio paths */
163static int dapm_connect_mux(struct snd_soc_codec *codec,
164 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
165 struct snd_soc_dapm_path *path, const char *control_name,
166 const struct snd_kcontrol_new *kcontrol)
167{
168 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
169 int i;
170
171 for (i = 0; i < e->mask; i++) {
172 if (!(strcmp(control_name, e->texts[i]))) {
173 list_add(&path->list, &codec->dapm_paths);
174 list_add(&path->list_sink, &dest->sources);
175 list_add(&path->list_source, &src->sinks);
176 path->name = (char*)e->texts[i];
177 dapm_set_path_status(dest, path, 0);
178 return 0;
179 }
180 }
181
182 return -ENODEV;
183}
184
185/* connect mixer widget to it's interconnecting audio paths */
186static int dapm_connect_mixer(struct snd_soc_codec *codec,
187 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
188 struct snd_soc_dapm_path *path, const char *control_name)
189{
190 int i;
191
192 /* search for mixer kcontrol */
193 for (i = 0; i < dest->num_kcontrols; i++) {
194 if (!strcmp(control_name, dest->kcontrols[i].name)) {
195 list_add(&path->list, &codec->dapm_paths);
196 list_add(&path->list_sink, &dest->sources);
197 list_add(&path->list_source, &src->sinks);
198 path->name = dest->kcontrols[i].name;
199 dapm_set_path_status(dest, path, i);
200 return 0;
201 }
202 }
203 return -ENODEV;
204}
205
206/* update dapm codec register bits */
207static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
208{
209 int change, power;
210 unsigned short old, new;
211 struct snd_soc_codec *codec = widget->codec;
212
213 /* check for valid widgets */
214 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
215 widget->id == snd_soc_dapm_output ||
216 widget->id == snd_soc_dapm_hp ||
217 widget->id == snd_soc_dapm_mic ||
218 widget->id == snd_soc_dapm_line ||
219 widget->id == snd_soc_dapm_spk)
220 return 0;
221
222 power = widget->power;
223 if (widget->invert)
224 power = (power ? 0:1);
225
226 old = snd_soc_read(codec, widget->reg);
227 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
228
229 change = old != new;
230 if (change) {
231 pop_dbg("pop test %s : %s in %d ms\n", widget->name,
232 widget->power ? "on" : "off", POP_TIME);
233 snd_soc_write(codec, widget->reg, new);
234 pop_wait(POP_TIME);
235 }
236 dbg("reg old %x new %x change %d\n", old, new, change);
237 return change;
238}
239
240/* ramps the volume up or down to minimise pops before or after a
241 * DAPM power event */
242static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
243{
244 const struct snd_kcontrol_new *k = widget->kcontrols;
245
246 if (widget->muted && !power)
247 return 0;
248 if (!widget->muted && power)
249 return 0;
250
251 if (widget->num_kcontrols && k) {
252 int reg = k->private_value & 0xff;
253 int shift = (k->private_value >> 8) & 0x0f;
254 int mask = (k->private_value >> 16) & 0xff;
255 int invert = (k->private_value >> 24) & 0x01;
256
257 if (power) {
258 int i;
259 /* power up has happended, increase volume to last level */
260 if (invert) {
261 for (i = mask; i > widget->saved_value; i--)
262 snd_soc_update_bits(widget->codec, reg, mask, i);
263 } else {
264 for (i = 0; i < widget->saved_value; i++)
265 snd_soc_update_bits(widget->codec, reg, mask, i);
266 }
267 widget->muted = 0;
268 } else {
269 /* power down is about to occur, decrease volume to mute */
270 int val = snd_soc_read(widget->codec, reg);
271 int i = widget->saved_value = (val >> shift) & mask;
272 if (invert) {
273 for (; i < mask; i++)
274 snd_soc_update_bits(widget->codec, reg, mask, i);
275 } else {
276 for (; i > 0; i--)
277 snd_soc_update_bits(widget->codec, reg, mask, i);
278 }
279 widget->muted = 1;
280 }
281 }
282 return 0;
283}
284
285/* create new dapm mixer control */
286static int dapm_new_mixer(struct snd_soc_codec *codec,
287 struct snd_soc_dapm_widget *w)
288{
289 int i, ret = 0;
290 char name[32];
291 struct snd_soc_dapm_path *path;
292
293 /* add kcontrol */
294 for (i = 0; i < w->num_kcontrols; i++) {
295
296 /* match name */
297 list_for_each_entry(path, &w->sources, list_sink) {
298
299 /* mixer/mux paths name must match control name */
300 if (path->name != (char*)w->kcontrols[i].name)
301 continue;
302
303 /* add dapm control with long name */
304 snprintf(name, 32, "%s %s", w->name, w->kcontrols[i].name);
305 path->long_name = kstrdup (name, GFP_KERNEL);
306 if (path->long_name == NULL)
307 return -ENOMEM;
308
309 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
310 path->long_name);
311 ret = snd_ctl_add(codec->card, path->kcontrol);
312 if (ret < 0) {
313 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s\n",
314 path->long_name);
315 kfree(path->long_name);
316 path->long_name = NULL;
317 return ret;
318 }
319 }
320 }
321 return ret;
322}
323
324/* create new dapm mux control */
325static int dapm_new_mux(struct snd_soc_codec *codec,
326 struct snd_soc_dapm_widget *w)
327{
328 struct snd_soc_dapm_path *path = NULL;
329 struct snd_kcontrol *kcontrol;
330 int ret = 0;
331
332 if (!w->num_kcontrols) {
333 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
334 return -EINVAL;
335 }
336
337 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
338 ret = snd_ctl_add(codec->card, kcontrol);
339 if (ret < 0)
340 goto err;
341
342 list_for_each_entry(path, &w->sources, list_sink)
343 path->kcontrol = kcontrol;
344
345 return ret;
346
347err:
348 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
349 return ret;
350}
351
352/* create new dapm volume control */
353static int dapm_new_pga(struct snd_soc_codec *codec,
354 struct snd_soc_dapm_widget *w)
355{
356 struct snd_kcontrol *kcontrol;
357 int ret = 0;
358
359 if (!w->num_kcontrols)
360 return -EINVAL;
361
362 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
363 ret = snd_ctl_add(codec->card, kcontrol);
364 if (ret < 0) {
365 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
366 return ret;
367 }
368
369 return ret;
370}
371
372/* reset 'walked' bit for each dapm path */
373static inline void dapm_clear_walk(struct snd_soc_codec *codec)
374{
375 struct snd_soc_dapm_path *p;
376
377 list_for_each_entry(p, &codec->dapm_paths, list)
378 p->walked = 0;
379}
380
381/*
382 * Recursively check for a completed path to an active or physically connected
383 * output widget. Returns number of complete paths.
384 */
385static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
386{
387 struct snd_soc_dapm_path *path;
388 int con = 0;
389
390 if (widget->id == snd_soc_dapm_adc && widget->active)
391 return 1;
392
393 if (widget->connected) {
394 /* connected pin ? */
395 if (widget->id == snd_soc_dapm_output && !widget->ext)
396 return 1;
397
398 /* connected jack or spk ? */
399 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
400 widget->id == snd_soc_dapm_line)
401 return 1;
402 }
403
404 list_for_each_entry(path, &widget->sinks, list_source) {
405 if (path->walked)
406 continue;
407
408 if (path->sink && path->connect) {
409 path->walked = 1;
410 con += is_connected_output_ep(path->sink);
411 }
412 }
413
414 return con;
415}
416
417/*
418 * Recursively check for a completed path to an active or physically connected
419 * input widget. Returns number of complete paths.
420 */
421static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
422{
423 struct snd_soc_dapm_path *path;
424 int con = 0;
425
426 /* active stream ? */
427 if (widget->id == snd_soc_dapm_dac && widget->active)
428 return 1;
429
430 if (widget->connected) {
431 /* connected pin ? */
432 if (widget->id == snd_soc_dapm_input && !widget->ext)
433 return 1;
434
435 /* connected VMID/Bias for lower pops */
436 if (widget->id == snd_soc_dapm_vmid)
437 return 1;
438
439 /* connected jack ? */
440 if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line)
441 return 1;
442 }
443
444 list_for_each_entry(path, &widget->sources, list_sink) {
445 if (path->walked)
446 continue;
447
448 if (path->source && path->connect) {
449 path->walked = 1;
450 con += is_connected_input_ep(path->source);
451 }
452 }
453
454 return con;
455}
456
457/*
458 * Scan each dapm widget for complete audio path.
459 * A complete path is a route that has valid endpoints i.e.:-
460 *
461 * o DAC to output pin.
462 * o Input Pin to ADC.
463 * o Input pin to Output pin (bypass, sidetone)
464 * o DAC to ADC (loopback).
465 */
d9c96cf3 466static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
2b97eabc
RP		 467{
468 struct snd_soc_dapm_widget *w;
469 int in, out, i, c = 1, *seq = NULL, ret = 0, power_change, power;
470
471 /* do we have a sequenced stream event */
472 if (event == SND_SOC_DAPM_STREAM_START) {
473 c = ARRAY_SIZE(dapm_up_seq);
474 seq = dapm_up_seq;
475 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
476 c = ARRAY_SIZE(dapm_down_seq);
477 seq = dapm_down_seq;
478 }
479
480 for(i = 0; i < c; i++) {
481 list_for_each_entry(w, &codec->dapm_widgets, list) {
482
483 /* is widget in stream order */
484 if (seq && seq[i] && w->id != seq[i])
485 continue;
486
487 /* vmid - no action */
488 if (w->id == snd_soc_dapm_vmid)
489 continue;
490
491 /* active ADC */
492 if (w->id == snd_soc_dapm_adc && w->active) {
493 in = is_connected_input_ep(w);
494 dapm_clear_walk(w->codec);
495 w->power = (in != 0) ? 1 : 0;
496 dapm_update_bits(w);
497 continue;
498 }
499
500 /* active DAC */
501 if (w->id == snd_soc_dapm_dac && w->active) {
502 out = is_connected_output_ep(w);
503 dapm_clear_walk(w->codec);
504 w->power = (out != 0) ? 1 : 0;
505 dapm_update_bits(w);
506 continue;
507 }
508
509 /* programmable gain/attenuation */
510 if (w->id == snd_soc_dapm_pga) {
511 int on;
512 in = is_connected_input_ep(w);
513 dapm_clear_walk(w->codec);
514 out = is_connected_output_ep(w);
515 dapm_clear_walk(w->codec);
516 w->power = on = (out != 0 && in != 0) ? 1 : 0;
517
518 if (!on)
519 dapm_set_pga(w, on); /* lower volume to reduce pops */
520 dapm_update_bits(w);
521 if (on)
522 dapm_set_pga(w, on); /* restore volume from zero */
523
524 continue;
525 }
526
527 /* pre and post event widgets */
528 if (w->id == snd_soc_dapm_pre) {
529 if (!w->event)
530 continue;
531
532 if (event == SND_SOC_DAPM_STREAM_START) {
533 ret = w->event(w, SND_SOC_DAPM_PRE_PMU);
534 if (ret < 0)
535 return ret;
536 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
537 ret = w->event(w, SND_SOC_DAPM_PRE_PMD);
538 if (ret < 0)
539 return ret;
540 }
541 continue;
542 }
543 if (w->id == snd_soc_dapm_post) {
544 if (!w->event)
545 continue;
546
547 if (event == SND_SOC_DAPM_STREAM_START) {
548 ret = w->event(w, SND_SOC_DAPM_POST_PMU);
549 if (ret < 0)
550 return ret;
551 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
552 ret = w->event(w, SND_SOC_DAPM_POST_PMD);
553 if (ret < 0)
554 return ret;
555 }
556 continue;
557 }
558
559 /* all other widgets */
560 in = is_connected_input_ep(w);
561 dapm_clear_walk(w->codec);
562 out = is_connected_output_ep(w);
563 dapm_clear_walk(w->codec);
564 power = (out != 0 && in != 0) ? 1 : 0;
565 power_change = (w->power == power) ? 0: 1;
566 w->power = power;
567
568 /* call any power change event handlers */
569 if (power_change) {
570 if (w->event) {
571 dbg("power %s event for %s flags %x\n",
572 w->power ? "on" : "off", w->name, w->event_flags);
573 if (power) {
574 /* power up event */
575 if (w->event_flags & SND_SOC_DAPM_PRE_PMU) {
576 ret = w->event(w, SND_SOC_DAPM_PRE_PMU);
577 if (ret < 0)
578 return ret;
579 }
580 dapm_update_bits(w);
581 if (w->event_flags & SND_SOC_DAPM_POST_PMU){
582 ret = w->event(w, SND_SOC_DAPM_POST_PMU);
583 if (ret < 0)
584 return ret;
585 }
586 } else {
587 /* power down event */
588 if (w->event_flags & SND_SOC_DAPM_PRE_PMD) {
589 ret = w->event(w, SND_SOC_DAPM_PRE_PMD);
590 if (ret < 0)
591 return ret;
592 }
593 dapm_update_bits(w);
594 if (w->event_flags & SND_SOC_DAPM_POST_PMD) {
595 ret = w->event(w, SND_SOC_DAPM_POST_PMD);
596 if (ret < 0)
597 return ret;
598 }
599 }
600 } else
601 /* no event handler */
602 dapm_update_bits(w);
603 }
604 }
605 }
606
607 return ret;
608}
609
610#if DAPM_DEBUG
611static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
612{
613 struct snd_soc_dapm_widget *w;
614 struct snd_soc_dapm_path *p = NULL;
615 int in, out;
616
617 printk("DAPM %s %s\n", codec->name, action);
618
619 list_for_each_entry(w, &codec->dapm_widgets, list) {
620
621 /* only display widgets that effect routing */
622 switch (w->id) {
623 case snd_soc_dapm_pre:
624 case snd_soc_dapm_post:
625 case snd_soc_dapm_vmid:
626 continue;
627 case snd_soc_dapm_mux:
628 case snd_soc_dapm_output:
629 case snd_soc_dapm_input:
630 case snd_soc_dapm_switch:
631 case snd_soc_dapm_hp:
632 case snd_soc_dapm_mic:
633 case snd_soc_dapm_spk:
634 case snd_soc_dapm_line:
635 case snd_soc_dapm_micbias:
636 case snd_soc_dapm_dac:
637 case snd_soc_dapm_adc:
638 case snd_soc_dapm_pga:
639 case snd_soc_dapm_mixer:
640 if (w->name) {
641 in = is_connected_input_ep(w);
642 dapm_clear_walk(w->codec);
643 out = is_connected_output_ep(w);
644 dapm_clear_walk(w->codec);
645 printk("%s: %s in %d out %d\n", w->name,
646 w->power ? "On":"Off",in, out);
647
648 list_for_each_entry(p, &w->sources, list_sink) {
649 if (p->connect)
650 printk(" in %s %s\n", p->name ? p->name : "static",
651 p->source->name);
652 }
653 list_for_each_entry(p, &w->sinks, list_source) {
654 p = list_entry(lp, struct snd_soc_dapm_path, list_source);
655 if (p->connect)
656 printk(" out %s %s\n", p->name ? p->name : "static",
657 p->sink->name);
658 }
659 }
660 break;
661 }
662 }
663}
664#endif
665
666/* test and update the power status of a mux widget */
d9c96cf3
AB		 667static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
668 struct snd_kcontrol *kcontrol, int mask,
669 int val, struct soc_enum* e)
2b97eabc
RP		 670{
671 struct snd_soc_dapm_path *path;
672 int found = 0;
673
674 if (widget->id != snd_soc_dapm_mux)
675 return -ENODEV;
676
677 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
678 return 0;
679
680 /* find dapm widget path assoc with kcontrol */
681 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
682 if (path->kcontrol != kcontrol)
683 continue;
684
685 if (!path->name || ! e->texts[val])
686 continue;
687
688 found = 1;
689 /* we now need to match the string in the enum to the path */
690 if (!(strcmp(path->name, e->texts[val])))
691 path->connect = 1; /* new connection */
692 else
693 path->connect = 0; /* old connection must be powered down */
694 }
695
696 if (found)
697 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
698
699 return 0;
700}
2b97eabc
RP		 701
702/* test and update the power status of a mixer widget */
d9c96cf3
AB		 703static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
704 struct snd_kcontrol *kcontrol, int reg,
705 int val_mask, int val, int invert)
2b97eabc
RP		 706{
707 struct snd_soc_dapm_path *path;
708 int found = 0;
709
710 if (widget->id != snd_soc_dapm_mixer)
711 return -ENODEV;
712
713 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
714 return 0;
715
716 /* find dapm widget path assoc with kcontrol */
717 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
718 if (path->kcontrol != kcontrol)
719 continue;
720
721 /* found, now check type */
722 found = 1;
723 if (val)
724 /* new connection */
725 path->connect = invert ? 0:1;
726 else
727 /* old connection must be powered down */
728 path->connect = invert ? 1:0;
729 break;
730 }
731
732 if (found)
733 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
734
735 return 0;
736}
2b97eabc
RP		 737
738/* show dapm widget status in sys fs */
739static ssize_t dapm_widget_show(struct device *dev,
740 struct device_attribute *attr, char *buf)
741{
742 struct snd_soc_device *devdata = dev_get_drvdata(dev);
743 struct snd_soc_codec *codec = devdata->codec;
744 struct snd_soc_dapm_widget *w;
745 int count = 0;
746 char *state = "not set";
747
748 list_for_each_entry(w, &codec->dapm_widgets, list) {
749
750 /* only display widgets that burnm power */
751 switch (w->id) {
752 case snd_soc_dapm_hp:
753 case snd_soc_dapm_mic:
754 case snd_soc_dapm_spk:
755 case snd_soc_dapm_line:
756 case snd_soc_dapm_micbias:
757 case snd_soc_dapm_dac:
758 case snd_soc_dapm_adc:
759 case snd_soc_dapm_pga:
760 case snd_soc_dapm_mixer:
761 if (w->name)
762 count += sprintf(buf + count, "%s: %s\n",
763 w->name, w->power ? "On":"Off");
764 break;
765 default:
766 break;
767 }
768 }
769
770 switch(codec->dapm_state){
771 case SNDRV_CTL_POWER_D0:
772 state = "D0";
773 break;
774 case SNDRV_CTL_POWER_D1:
775 state = "D1";
776 break;
777 case SNDRV_CTL_POWER_D2:
778 state = "D2";
779 break;
780 case SNDRV_CTL_POWER_D3hot:
781 state = "D3hot";
782 break;
783 case SNDRV_CTL_POWER_D3cold:
784 state = "D3cold";
785 break;
786 }
787 count += sprintf(buf + count, "PM State: %s\n", state);
788
789 return count;
790}
791
792static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
793
794int snd_soc_dapm_sys_add(struct device *dev)
795{
796 int ret = 0;
797
798 if (dapm_status)
799 ret = device_create_file(dev, &dev_attr_dapm_widget);
800
801 return ret;
802}
803
804static void snd_soc_dapm_sys_remove(struct device *dev)
805{
806 if (dapm_status)
807 device_remove_file(dev, &dev_attr_dapm_widget);
808}
809
810/* free all dapm widgets and resources */
d9c96cf3 811static void dapm_free_widgets(struct snd_soc_codec *codec)
2b97eabc
RP		 812{
813 struct snd_soc_dapm_widget *w, *next_w;
814 struct snd_soc_dapm_path *p, *next_p;
815
816 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
817 list_del(&w->list);
818 kfree(w);
819 }
820
821 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
822 list_del(&p->list);
823 kfree(p->long_name);
824 kfree(p);
825 }
826}
827
828/**
829 * snd_soc_dapm_sync_endpoints - scan and power dapm paths
830 * @codec: audio codec
831 *
832 * Walks all dapm audio paths and powers widgets according to their
833 * stream or path usage.
834 *
835 * Returns 0 for success.
836 */
837int snd_soc_dapm_sync_endpoints(struct snd_soc_codec *codec)
838{
839 return dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
840}
841EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_endpoints);
842
843/**
844 * snd_soc_dapm_connect_input - connect dapm widgets
845 * @codec: audio codec
846 * @sink: name of target widget
847 * @control: mixer control name
848 * @source: name of source name
849 *
850 * Connects 2 dapm widgets together via a named audio path. The sink is
851 * the widget receiving the audio signal, whilst the source is the sender
852 * of the audio signal.
853 *
854 * Returns 0 for success else error.
855 */
856int snd_soc_dapm_connect_input(struct snd_soc_codec *codec, const char *sink,
857 const char * control, const char *source)
858{
859 struct snd_soc_dapm_path *path;
860 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
861 int ret = 0;
862
863 /* find src and dest widgets */
864 list_for_each_entry(w, &codec->dapm_widgets, list) {
865
866 if (!wsink && !(strcmp(w->name, sink))) {
867 wsink = w;
868 continue;
869 }
870 if (!wsource && !(strcmp(w->name, source))) {
871 wsource = w;
872 }
873 }
874
875 if (wsource == NULL || wsink == NULL)
876 return -ENODEV;
877
878 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
879 if (!path)
880 return -ENOMEM;
881
882 path->source = wsource;
883 path->sink = wsink;
884 INIT_LIST_HEAD(&path->list);
885 INIT_LIST_HEAD(&path->list_source);
886 INIT_LIST_HEAD(&path->list_sink);
887
888 /* check for external widgets */
889 if (wsink->id == snd_soc_dapm_input) {
890 if (wsource->id == snd_soc_dapm_micbias ||
891 wsource->id == snd_soc_dapm_mic ||
892 wsink->id == snd_soc_dapm_line)
893 wsink->ext = 1;
894 }
895 if (wsource->id == snd_soc_dapm_output) {
896 if (wsink->id == snd_soc_dapm_spk ||
897 wsink->id == snd_soc_dapm_hp ||
898 wsink->id == snd_soc_dapm_line)
899 wsource->ext = 1;
900 }
901
902 /* connect static paths */
903 if (control == NULL) {
904 list_add(&path->list, &codec->dapm_paths);
905 list_add(&path->list_sink, &wsink->sources);
906 list_add(&path->list_source, &wsource->sinks);
907 path->connect = 1;
908 return 0;
909 }
910
911 /* connect dynamic paths */
912 switch(wsink->id) {
913 case snd_soc_dapm_adc:
914 case snd_soc_dapm_dac:
915 case snd_soc_dapm_pga:
916 case snd_soc_dapm_input:
917 case snd_soc_dapm_output:
918 case snd_soc_dapm_micbias:
919 case snd_soc_dapm_vmid:
920 case snd_soc_dapm_pre:
921 case snd_soc_dapm_post:
922 list_add(&path->list, &codec->dapm_paths);
923 list_add(&path->list_sink, &wsink->sources);
924 list_add(&path->list_source, &wsource->sinks);
925 path->connect = 1;
926 return 0;
927 case snd_soc_dapm_mux:
928 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
929 &wsink->kcontrols[0]);
930 if (ret != 0)
931 goto err;
932 break;
933 case snd_soc_dapm_switch:
934 case snd_soc_dapm_mixer:
935 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
936 if (ret != 0)
937 goto err;
938 break;
939 case snd_soc_dapm_hp:
940 case snd_soc_dapm_mic:
941 case snd_soc_dapm_line:
942 case snd_soc_dapm_spk:
943 list_add(&path->list, &codec->dapm_paths);
944 list_add(&path->list_sink, &wsink->sources);
945 list_add(&path->list_source, &wsource->sinks);
946 path->connect = 0;
947 return 0;
948 }
949 return 0;
950
951err:
952 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
953 control, sink);
954 kfree(path);
955 return ret;
956}
957EXPORT_SYMBOL_GPL(snd_soc_dapm_connect_input);
958
959/**
960 * snd_soc_dapm_new_widgets - add new dapm widgets
961 * @codec: audio codec
962 *
963 * Checks the codec for any new dapm widgets and creates them if found.
964 *
965 * Returns 0 for success.
966 */
967int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
968{
969 struct snd_soc_dapm_widget *w;
970
971 mutex_lock(&codec->mutex);
972 list_for_each_entry(w, &codec->dapm_widgets, list)
973 {
974 if (w->new)
975 continue;
976
977 switch(w->id) {
978 case snd_soc_dapm_switch:
979 case snd_soc_dapm_mixer:
980 dapm_new_mixer(codec, w);
981 break;
982 case snd_soc_dapm_mux:
983 dapm_new_mux(codec, w);
984 break;
985 case snd_soc_dapm_adc:
986 case snd_soc_dapm_dac:
987 case snd_soc_dapm_pga:
988 dapm_new_pga(codec, w);
989 break;
990 case snd_soc_dapm_input:
991 case snd_soc_dapm_output:
992 case snd_soc_dapm_micbias:
993 case snd_soc_dapm_spk:
994 case snd_soc_dapm_hp:
995 case snd_soc_dapm_mic:
996 case snd_soc_dapm_line:
997 case snd_soc_dapm_vmid:
998 case snd_soc_dapm_pre:
999 case snd_soc_dapm_post:
1000 break;
1001 }
1002 w->new = 1;
1003 }
1004
1005 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1006 mutex_unlock(&codec->mutex);
1007 return 0;
1008}
1009EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1010
1011/**
1012 * snd_soc_dapm_get_volsw - dapm mixer get callback
1013 * @kcontrol: mixer control
1014 * @uinfo: control element information
1015 *
1016 * Callback to get the value of a dapm mixer control.
1017 *
1018 * Returns 0 for success.
1019 */
1020int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1021 struct snd_ctl_elem_value *ucontrol)
1022{
1023 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1024 int reg = kcontrol->private_value & 0xff;
1025 int shift = (kcontrol->private_value >> 8) & 0x0f;
1026 int rshift = (kcontrol->private_value >> 12) & 0x0f;
1027 int mask = (kcontrol->private_value >> 16) & 0xff;
1028 int invert = (kcontrol->private_value >> 24) & 0x01;
1029
1030 /* return the saved value if we are powered down */
1031 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1032 ucontrol->value.integer.value[0] = widget->saved_value;
1033 return 0;
1034 }
1035
1036 ucontrol->value.integer.value[0] =
1037 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1038 if (shift != rshift)
1039 ucontrol->value.integer.value[1] =
1040 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1041 if (invert) {
1042 ucontrol->value.integer.value[0] =
1043 mask - ucontrol->value.integer.value[0];
1044 if (shift != rshift)
1045 ucontrol->value.integer.value[1] =
1046 mask - ucontrol->value.integer.value[1];
1047 }
1048
1049 return 0;
1050}
1051EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1052
1053/**
1054 * snd_soc_dapm_put_volsw - dapm mixer set callback
1055 * @kcontrol: mixer control
1056 * @uinfo: control element information
1057 *
1058 * Callback to set the value of a dapm mixer control.
1059 *
1060 * Returns 0 for success.
1061 */
1062int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1063 struct snd_ctl_elem_value *ucontrol)
1064{
1065 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1066 int reg = kcontrol->private_value & 0xff;
1067 int shift = (kcontrol->private_value >> 8) & 0x0f;
1068 int rshift = (kcontrol->private_value >> 12) & 0x0f;
1069 int mask = (kcontrol->private_value >> 16) & 0xff;
1070 int invert = (kcontrol->private_value >> 24) & 0x01;
1071 unsigned short val, val2, val_mask;
1072 int ret;
1073
1074 val = (ucontrol->value.integer.value[0] & mask);
1075
1076 if (invert)
1077 val = mask - val;
1078 val_mask = mask << shift;
1079 val = val << shift;
1080 if (shift != rshift) {
1081 val2 = (ucontrol->value.integer.value[1] & mask);
1082 if (invert)
1083 val2 = mask - val2;
1084 val_mask |= mask << rshift;
1085 val |= val2 << rshift;
1086 }
1087
1088 mutex_lock(&widget->codec->mutex);
1089 widget->value = val;
1090
1091 /* save volume value if the widget is powered down */
1092 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1093 widget->saved_value = val;
1094 mutex_unlock(&widget->codec->mutex);
1095 return 1;
1096 }
1097
1098 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1099 if (widget->event) {
1100 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1101 ret = widget->event(widget, SND_SOC_DAPM_PRE_REG);
1102 if (ret < 0)
1103 goto out;
1104 }
1105 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1106 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1107 ret = widget->event(widget, SND_SOC_DAPM_POST_REG);
1108 } else
1109 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1110
1111out:
1112 mutex_unlock(&widget->codec->mutex);
1113 return ret;
1114}
1115EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1116
1117/**
1118 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1119 * @kcontrol: mixer control
1120 * @uinfo: control element information
1121 *
1122 * Callback to get the value of a dapm enumerated double mixer control.
1123 *
1124 * Returns 0 for success.
1125 */
1126int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1127 struct snd_ctl_elem_value *ucontrol)
1128{
1129 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1130 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1131 unsigned short val, bitmask;
1132
1133 for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
1134 ;
1135 val = snd_soc_read(widget->codec, e->reg);
1136 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1137 if (e->shift_l != e->shift_r)
1138 ucontrol->value.enumerated.item[1] =
1139 (val >> e->shift_r) & (bitmask - 1);
1140
1141 return 0;
1142}
1143EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1144
1145/**
1146 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1147 * @kcontrol: mixer control
1148 * @uinfo: control element information
1149 *
1150 * Callback to set the value of a dapm enumerated double mixer control.
1151 *
1152 * Returns 0 for success.
1153 */
1154int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1155 struct snd_ctl_elem_value *ucontrol)
1156{
1157 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1158 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1159 unsigned short val, mux;
1160 unsigned short mask, bitmask;
1161 int ret = 0;
1162
1163 for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
1164 ;
1165 if (ucontrol->value.enumerated.item[0] > e->mask - 1)
1166 return -EINVAL;
1167 mux = ucontrol->value.enumerated.item[0];
1168 val = mux << e->shift_l;
1169 mask = (bitmask - 1) << e->shift_l;
1170 if (e->shift_l != e->shift_r) {
1171 if (ucontrol->value.enumerated.item[1] > e->mask - 1)
1172 return -EINVAL;
1173 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1174 mask |= (bitmask - 1) << e->shift_r;
1175 }
1176
1177 mutex_lock(&widget->codec->mutex);
1178 widget->value = val;
1179 dapm_mux_update_power(widget, kcontrol, mask, mux, e);
1180 if (widget->event) {
1181 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1182 ret = widget->event(widget, SND_SOC_DAPM_PRE_REG);
1183 if (ret < 0)
1184 goto out;
1185 }
1186 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1187 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1188 ret = widget->event(widget, SND_SOC_DAPM_POST_REG);
1189 } else
1190 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1191
1192out:
1193 mutex_unlock(&widget->codec->mutex);
1194 return ret;
1195}
1196EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1197
1198/**
1199 * snd_soc_dapm_new_control - create new dapm control
1200 * @codec: audio codec
1201 * @widget: widget template
1202 *
1203 * Creates a new dapm control based upon the template.
1204 *
1205 * Returns 0 for success else error.
1206 */
1207int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1208 const struct snd_soc_dapm_widget *widget)
1209{
1210 struct snd_soc_dapm_widget *w;
1211
1212 if ((w = dapm_cnew_widget(widget)) == NULL)
1213 return -ENOMEM;
1214
1215 w->codec = codec;
1216 INIT_LIST_HEAD(&w->sources);
1217 INIT_LIST_HEAD(&w->sinks);
1218 INIT_LIST_HEAD(&w->list);
1219 list_add(&w->list, &codec->dapm_widgets);
1220
1221 /* machine layer set ups unconnected pins and insertions */
1222 w->connected = 1;
1223 return 0;
1224}
1225EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1226
1227/**
1228 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1229 * @codec: audio codec
1230 * @stream: stream name
1231 * @event: stream event
1232 *
1233 * Sends a stream event to the dapm core. The core then makes any
1234 * necessary widget power changes.
1235 *
1236 * Returns 0 for success else error.
1237 */
1238int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1239 char *stream, int event)
1240{
1241 struct snd_soc_dapm_widget *w;
1242
1243 mutex_lock(&codec->mutex);
1244 list_for_each_entry(w, &codec->dapm_widgets, list)
1245 {
1246 if (!w->sname)
1247 continue;
1248 dbg("widget %s\n %s stream %s event %d\n", w->name, w->sname,
1249 stream, event);
1250 if (strstr(w->sname, stream)) {
1251 switch(event) {
1252 case SND_SOC_DAPM_STREAM_START:
1253 w->active = 1;
1254 break;
1255 case SND_SOC_DAPM_STREAM_STOP:
1256 w->active = 0;
1257 break;
1258 case SND_SOC_DAPM_STREAM_SUSPEND:
1259 if (w->active)
1260 w->suspend = 1;
1261 w->active = 0;
1262 break;
1263 case SND_SOC_DAPM_STREAM_RESUME:
1264 if (w->suspend) {
1265 w->active = 1;
1266 w->suspend = 0;
1267 }
1268 break;
1269 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
1270 break;
1271 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
1272 break;
1273 }
1274 }
1275 }
1276 mutex_unlock(&codec->mutex);
1277
1278 dapm_power_widgets(codec, event);
1279 dump_dapm(codec, __FUNCTION__);
1280 return 0;
1281}
1282EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
1283
1284/**
1285 * snd_soc_dapm_set_endpoint - set audio endpoint status
1286 * @codec: audio codec
1287 * @endpoint: audio signal endpoint (or start point)
1288 * @status: point status
1289 *
1290 * Set audio endpoint status - connected or disconnected.
1291 *
1292 * Returns 0 for success else error.
1293 */
1294int snd_soc_dapm_set_endpoint(struct snd_soc_codec *codec,
1295 char *endpoint, int status)
1296{
1297 struct snd_soc_dapm_widget *w;
1298
1299 list_for_each_entry(w, &codec->dapm_widgets, list) {
1300 if (!strcmp(w->name, endpoint)) {
1301 w->connected = status;
1302 }
1303 }
1304
1305 return 0;
1306}
1307EXPORT_SYMBOL_GPL(snd_soc_dapm_set_endpoint);
1308
1309/**
1310 * snd_soc_dapm_free - free dapm resources
1311 * @socdev: SoC device
1312 *
1313 * Free all dapm widgets and resources.
1314 */
1315void snd_soc_dapm_free(struct snd_soc_device *socdev)
1316{
1317 struct snd_soc_codec *codec = socdev->codec;
1318
1319 snd_soc_dapm_sys_remove(socdev->dev);
1320 dapm_free_widgets(codec);
1321}
1322EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
1323
1324/* Module information */
1325MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com");
1326MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1327MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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