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ASoC: dapm: Add snd_soc_dapm_switch to the power up/down sequence table
[linux-2.6-block.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.
d331124d 5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
2b97eabc
RP		 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 *
2b97eabc
RP		 12 * Features:
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
74b8f955 15 * DACs/ADCs.
2b97eabc 16 * o Platform power domain - can support external components i.e. amps and
612a3fec 17 * mic/headphone insertion events.
2b97eabc
RP		 18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
20 * sinks, dacs, etc
612a3fec 21 * o Delayed power down of audio subsystem to reduce pops between a quick
2b97eabc
RP		 22 * device reopen.
23 *
2b97eabc
RP		 24 */
25
26#include <linux/module.h>
27#include <linux/moduleparam.h>
28#include <linux/init.h>
9d0624a7 29#include <linux/async.h>
2b97eabc
RP		 30#include <linux/delay.h>
31#include <linux/pm.h>
32#include <linux/bitops.h>
33#include <linux/platform_device.h>
34#include <linux/jiffies.h>
20496ff3 35#include <linux/debugfs.h>
f1aac484 36#include <linux/pm_runtime.h>
62ea874a 37#include <linux/regulator/consumer.h>
d7e7eb91 38#include <linux/clk.h>
5a0e3ad6 39#include <linux/slab.h>
2b97eabc
RP		 40#include <sound/core.h>
41#include <sound/pcm.h>
42#include <sound/pcm_params.h>
ce6120cc 43#include <sound/soc.h>
2b97eabc
RP		 44#include <sound/initval.h>
45
84e90930
MB		 46#include <trace/events/asoc.h>
47
de02d078
MB		 48#define DAPM_UPDATE_STAT(widget, val) widget->dapm->card->dapm_stats.val++;
49
2b97eabc
RP		 50/* dapm power sequences - make this per codec in the future */
51static int dapm_up_seq[] = {
38357ab2
MB		 52 [snd_soc_dapm_pre] = 0,
53 [snd_soc_dapm_supply] = 1,
62ea874a 54 [snd_soc_dapm_regulator_supply] = 1,
d7e7eb91 55 [snd_soc_dapm_clock_supply] = 1,
38357ab2 56 [snd_soc_dapm_micbias] = 2,
c74184ed 57 [snd_soc_dapm_dai_link] = 2,
888df395 58 [snd_soc_dapm_dai] = 3,
010ff262
MB		 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,
24ff33ac 63 [snd_soc_dapm_virt_mux] = 5,
010ff262
MB		 64 [snd_soc_dapm_value_mux] = 5,
65 [snd_soc_dapm_dac] = 6,
efc77e36 66 [snd_soc_dapm_switch] = 7,
010ff262
MB		 67 [snd_soc_dapm_mixer] = 7,
68 [snd_soc_dapm_mixer_named_ctl] = 7,
69 [snd_soc_dapm_pga] = 8,
70 [snd_soc_dapm_adc] = 9,
d88429a6 71 [snd_soc_dapm_out_drv] = 10,
010ff262
MB		 72 [snd_soc_dapm_hp] = 10,
73 [snd_soc_dapm_spk] = 10,
7e1f7c8a 74 [snd_soc_dapm_line] = 10,
010ff262 75 [snd_soc_dapm_post] = 11,
2b97eabc 76};
ca9c1aae 77
2b97eabc 78static int dapm_down_seq[] = {
38357ab2
MB		 79 [snd_soc_dapm_pre] = 0,
80 [snd_soc_dapm_adc] = 1,
81 [snd_soc_dapm_hp] = 2,
1ca04065 82 [snd_soc_dapm_spk] = 2,
7e1f7c8a 83 [snd_soc_dapm_line] = 2,
d88429a6 84 [snd_soc_dapm_out_drv] = 2,
38357ab2 85 [snd_soc_dapm_pga] = 4,
efc77e36 86 [snd_soc_dapm_switch] = 5,
38357ab2 87 [snd_soc_dapm_mixer_named_ctl] = 5,
e3d4dabd
MB		 88 [snd_soc_dapm_mixer] = 5,
89 [snd_soc_dapm_dac] = 6,
90 [snd_soc_dapm_mic] = 7,
91 [snd_soc_dapm_micbias] = 8,
92 [snd_soc_dapm_mux] = 9,
24ff33ac 93 [snd_soc_dapm_virt_mux] = 9,
e3d4dabd 94 [snd_soc_dapm_value_mux] = 9,
010ff262
MB		 95 [snd_soc_dapm_aif_in] = 10,
96 [snd_soc_dapm_aif_out] = 10,
888df395 97 [snd_soc_dapm_dai] = 10,
c74184ed 98 [snd_soc_dapm_dai_link] = 11,
d7e7eb91 99 [snd_soc_dapm_clock_supply] = 12,
c74184ed
MB		 100 [snd_soc_dapm_regulator_supply] = 12,
101 [snd_soc_dapm_supply] = 12,
102 [snd_soc_dapm_post] = 13,
2b97eabc
RP		 103};
104
12ef193d 105static void pop_wait(u32 pop_time)
15e4c72f
MB		 106{
107 if (pop_time)
108 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
109}
110
fd8d3bc0 111static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
15e4c72f
MB		 112{
113 va_list args;
fd8d3bc0 114 char *buf;
15e4c72f 115
fd8d3bc0
JN		 116 if (!pop_time)
117 return;
15e4c72f 118
fd8d3bc0
JN		 119 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
120 if (buf == NULL)
121 return;
15e4c72f 122
fd8d3bc0
JN		 123 va_start(args, fmt);
124 vsnprintf(buf, PAGE_SIZE, fmt, args);
9d01df06 125 dev_info(dev, "%s", buf);
15e4c72f 126 va_end(args);
fd8d3bc0
JN		 127
128 kfree(buf);
15e4c72f
MB		 129}
130
db432b41
MB		 131static bool dapm_dirty_widget(struct snd_soc_dapm_widget *w)
132{
133 return !list_empty(&w->dirty);
134}
135
25c77c5f 136void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason)
db432b41 137{
75c1f891
MB		 138 if (!dapm_dirty_widget(w)) {
139 dev_vdbg(w->dapm->dev, "Marking %s dirty due to %s\n",
140 w->name, reason);
db432b41 141 list_add_tail(&w->dirty, &w->dapm->card->dapm_dirty);
75c1f891 142 }
db432b41 143}
25c77c5f 144EXPORT_SYMBOL_GPL(dapm_mark_dirty);
db432b41 145
e2d32ff6
MB		 146void dapm_mark_io_dirty(struct snd_soc_dapm_context *dapm)
147{
148 struct snd_soc_card *card = dapm->card;
149 struct snd_soc_dapm_widget *w;
150
151 mutex_lock(&card->dapm_mutex);
152
153 list_for_each_entry(w, &card->widgets, list) {
154 switch (w->id) {
155 case snd_soc_dapm_input:
156 case snd_soc_dapm_output:
157 dapm_mark_dirty(w, "Rechecking inputs and outputs");
158 break;
159 default:
160 break;
161 }
162 }
163
164 mutex_unlock(&card->dapm_mutex);
165}
166EXPORT_SYMBOL_GPL(dapm_mark_io_dirty);
167
2b97eabc 168/* create a new dapm widget */
88cb4290 169static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
2b97eabc
RP		 170 const struct snd_soc_dapm_widget *_widget)
171{
88cb4290 172 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
2b97eabc
RP		 173}
174
4805608a
LG		 175/* get snd_card from DAPM context */
176static inline struct snd_card *dapm_get_snd_card(
177 struct snd_soc_dapm_context *dapm)
178{
179 if (dapm->codec)
180 return dapm->codec->card->snd_card;
181 else if (dapm->platform)
182 return dapm->platform->card->snd_card;
183 else
184 BUG();
185
186 /* unreachable */
187 return NULL;
188}
189
190/* get soc_card from DAPM context */
191static inline struct snd_soc_card *dapm_get_soc_card(
192 struct snd_soc_dapm_context *dapm)
193{
194 if (dapm->codec)
195 return dapm->codec->card;
196 else if (dapm->platform)
197 return dapm->platform->card;
198 else
199 BUG();
200
201 /* unreachable */
202 return NULL;
203}
204
6c120e19
LG		 205static void dapm_reset(struct snd_soc_card *card)
206{
207 struct snd_soc_dapm_widget *w;
208
209 memset(&card->dapm_stats, 0, sizeof(card->dapm_stats));
210
211 list_for_each_entry(w, &card->widgets, list) {
212 w->power_checked = false;
213 w->inputs = -1;
214 w->outputs = -1;
215 }
216}
217
0445bdf4
LG		 218static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
219{
220 if (w->codec)
221 return snd_soc_read(w->codec, reg);
b7950641
LG		 222 else if (w->platform)
223 return snd_soc_platform_read(w->platform, reg);
224
30a6a1a4 225 dev_err(w->dapm->dev, "ASoC: no valid widget read method\n");
b7950641 226 return -1;
0445bdf4
LG		 227}
228
229static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
230{
231 if (w->codec)
232 return snd_soc_write(w->codec, reg, val);
b7950641
LG		 233 else if (w->platform)
234 return snd_soc_platform_write(w->platform, reg, val);
235
30a6a1a4 236 dev_err(w->dapm->dev, "ASoC: no valid widget write method\n");
b7950641 237 return -1;
0445bdf4
LG		 238}
239
49575fb5
LG		 240static inline void soc_widget_lock(struct snd_soc_dapm_widget *w)
241{
e06ab3b8 242 if (w->codec && !w->codec->using_regmap)
49575fb5
LG		 243 mutex_lock(&w->codec->mutex);
244 else if (w->platform)
245 mutex_lock(&w->platform->mutex);
246}
247
248static inline void soc_widget_unlock(struct snd_soc_dapm_widget *w)
249{
e06ab3b8 250 if (w->codec && !w->codec->using_regmap)
49575fb5
LG		 251 mutex_unlock(&w->codec->mutex);
252 else if (w->platform)
253 mutex_unlock(&w->platform->mutex);
254}
255
256static int soc_widget_update_bits_locked(struct snd_soc_dapm_widget *w,
0445bdf4
LG		 257 unsigned short reg, unsigned int mask, unsigned int value)
258{
8a713da8 259 bool change;
0445bdf4
LG		 260 unsigned int old, new;
261 int ret;
262
8a713da8
MB		 263 if (w->codec && w->codec->using_regmap) {
264 ret = regmap_update_bits_check(w->codec->control_data,
265 reg, mask, value, &change);
266 if (ret != 0)
267 return ret;
268 } else {
49575fb5 269 soc_widget_lock(w);
8a713da8 270 ret = soc_widget_read(w, reg);
49575fb5
LG		 271 if (ret < 0) {
272 soc_widget_unlock(w);
0445bdf4 273 return ret;
49575fb5 274 }
8a713da8
MB		 275
276 old = ret;
277 new = (old & ~mask) | (value & mask);
278 change = old != new;
279 if (change) {
280 ret = soc_widget_write(w, reg, new);
49575fb5
LG		 281 if (ret < 0) {
282 soc_widget_unlock(w);
8a713da8 283 return ret;
49575fb5 284 }
8a713da8 285 }
49575fb5 286 soc_widget_unlock(w);
0445bdf4
LG		 287 }
288
289 return change;
290}
291
452c5eaa
MB		 292/**
293 * snd_soc_dapm_set_bias_level - set the bias level for the system
ed5a4c47 294 * @dapm: DAPM context
452c5eaa
MB		 295 * @level: level to configure
296 *
297 * Configure the bias (power) levels for the SoC audio device.
298 *
299 * Returns 0 for success else error.
300 */
ed5a4c47 301static int snd_soc_dapm_set_bias_level(struct snd_soc_dapm_context *dapm,
ce6120cc 302 enum snd_soc_bias_level level)
452c5eaa 303{
ed5a4c47 304 struct snd_soc_card *card = dapm->card;
452c5eaa
MB		 305 int ret = 0;
306
84e90930
MB		 307 trace_snd_soc_bias_level_start(card, level);
308
f0fba2ad 309 if (card && card->set_bias_level)
d4c6005f 310 ret = card->set_bias_level(card, dapm, level);
171ec6b0
MB		 311 if (ret != 0)
312 goto out;
313
cc4c670a
MB		 314 if (dapm->codec) {
315 if (dapm->codec->driver->set_bias_level)
316 ret = dapm->codec->driver->set_bias_level(dapm->codec,
317 level);
d8c3bb91
MB		 318 else
319 dapm->bias_level = level;
4e872a46 320 } else if (!card || dapm != &card->dapm) {
4123128e 321 dapm->bias_level = level;
4e872a46 322 }
4123128e 323
171ec6b0
MB		 324 if (ret != 0)
325 goto out;
326
327 if (card && card->set_bias_level_post)
d4c6005f 328 ret = card->set_bias_level_post(card, dapm, level);
171ec6b0 329out:
84e90930
MB		 330 trace_snd_soc_bias_level_done(card, level);
331
452c5eaa
MB		 332 return ret;
333}
334
2b97eabc
RP		 335/* set up initial codec paths */
336static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
337 struct snd_soc_dapm_path *p, int i)
338{
339 switch (w->id) {
340 case snd_soc_dapm_switch:
ca9c1aae
IM		 341 case snd_soc_dapm_mixer:
342 case snd_soc_dapm_mixer_named_ctl: {
2b97eabc 343 int val;
4eaa9819 344 struct soc_mixer_control *mc = (struct soc_mixer_control *)
82cfecdc 345 w->kcontrol_news[i].private_value;
815ecf8d
JS		 346 unsigned int reg = mc->reg;
347 unsigned int shift = mc->shift;
4eaa9819 348 int max = mc->max;
815ecf8d
JS		 349 unsigned int mask = (1 << fls(max)) - 1;
350 unsigned int invert = mc->invert;
2b97eabc 351
0445bdf4 352 val = soc_widget_read(w, reg);
2b97eabc 353 val = (val >> shift) & mask;
32fee7af
BT		 354 if (invert)
355 val = max - val;
2b97eabc 356
32fee7af 357 p->connect = !!val;
2b97eabc
RP		 358 }
359 break;
360 case snd_soc_dapm_mux: {
82cfecdc
SW		 361 struct soc_enum *e = (struct soc_enum *)
362 w->kcontrol_news[i].private_value;
86767b7d 363 int val, item;
2b97eabc 364
0445bdf4 365 val = soc_widget_read(w, e->reg);
86767b7d 366 item = (val >> e->shift_l) & e->mask;
2b97eabc
RP		 367
368 p->connect = 0;
f8ba0b7b 369 for (i = 0; i < e->max; i++) {
2b97eabc
RP		 370 if (!(strcmp(p->name, e->texts[i])) && item == i)
371 p->connect = 1;
372 }
373 }
374 break;
24ff33ac 375 case snd_soc_dapm_virt_mux: {
82cfecdc
SW		 376 struct soc_enum *e = (struct soc_enum *)
377 w->kcontrol_news[i].private_value;
24ff33ac
DP		 378
379 p->connect = 0;
380 /* since a virtual mux has no backing registers to
381 * decide which path to connect, it will try to match
382 * with the first enumeration. This is to ensure
383 * that the default mux choice (the first) will be
384 * correctly powered up during initialization.
385 */
386 if (!strcmp(p->name, e->texts[0]))
387 p->connect = 1;
388 }
389 break;
2e72f8e3 390 case snd_soc_dapm_value_mux: {
74155556 391 struct soc_enum *e = (struct soc_enum *)
82cfecdc 392 w->kcontrol_news[i].private_value;
2e72f8e3
PU		 393 int val, item;
394
0445bdf4 395 val = soc_widget_read(w, e->reg);
2e72f8e3
PU		 396 val = (val >> e->shift_l) & e->mask;
397 for (item = 0; item < e->max; item++) {
398 if (val == e->values[item])
399 break;
400 }
401
402 p->connect = 0;
403 for (i = 0; i < e->max; i++) {
404 if (!(strcmp(p->name, e->texts[i])) && item == i)
405 p->connect = 1;
406 }
407 }
408 break;
56563100 409 /* does not affect routing - always connected */
2b97eabc 410 case snd_soc_dapm_pga:
d88429a6 411 case snd_soc_dapm_out_drv:
2b97eabc
RP		 412 case snd_soc_dapm_output:
413 case snd_soc_dapm_adc:
414 case snd_soc_dapm_input:
1ab97c8c 415 case snd_soc_dapm_siggen:
2b97eabc
RP		 416 case snd_soc_dapm_dac:
417 case snd_soc_dapm_micbias:
418 case snd_soc_dapm_vmid:
246d0a17 419 case snd_soc_dapm_supply:
62ea874a 420 case snd_soc_dapm_regulator_supply:
d7e7eb91 421 case snd_soc_dapm_clock_supply:
010ff262
MB		 422 case snd_soc_dapm_aif_in:
423 case snd_soc_dapm_aif_out:
888df395 424 case snd_soc_dapm_dai:
2b97eabc
RP		 425 case snd_soc_dapm_hp:
426 case snd_soc_dapm_mic:
427 case snd_soc_dapm_spk:
428 case snd_soc_dapm_line:
c74184ed 429 case snd_soc_dapm_dai_link:
56563100
MB		 430 p->connect = 1;
431 break;
432 /* does affect routing - dynamically connected */
2b97eabc
RP		 433 case snd_soc_dapm_pre:
434 case snd_soc_dapm_post:
435 p->connect = 0;
436 break;
437 }
438}
439
74b8f955 440/* connect mux widget to its interconnecting audio paths */
ce6120cc 441static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
2b97eabc
RP		 442 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
443 struct snd_soc_dapm_path *path, const char *control_name,
444 const struct snd_kcontrol_new *kcontrol)
445{
446 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
447 int i;
448
f8ba0b7b 449 for (i = 0; i < e->max; i++) {
2b97eabc 450 if (!(strcmp(control_name, e->texts[i]))) {
8ddab3f5 451 list_add(&path->list, &dapm->card->paths);
2b97eabc
RP		 452 list_add(&path->list_sink, &dest->sources);
453 list_add(&path->list_source, &src->sinks);
454 path->name = (char*)e->texts[i];
455 dapm_set_path_status(dest, path, 0);
456 return 0;
457 }
458 }
459
460 return -ENODEV;
461}
462
74b8f955 463/* connect mixer widget to its interconnecting audio paths */
ce6120cc 464static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
2b97eabc
RP		 465 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
466 struct snd_soc_dapm_path *path, const char *control_name)
467{
468 int i;
469
470 /* search for mixer kcontrol */
471 for (i = 0; i < dest->num_kcontrols; i++) {
82cfecdc 472 if (!strcmp(control_name, dest->kcontrol_news[i].name)) {
8ddab3f5 473 list_add(&path->list, &dapm->card->paths);
2b97eabc
RP		 474 list_add(&path->list_sink, &dest->sources);
475 list_add(&path->list_source, &src->sinks);
82cfecdc 476 path->name = dest->kcontrol_news[i].name;
2b97eabc
RP		 477 dapm_set_path_status(dest, path, i);
478 return 0;
479 }
480 }
481 return -ENODEV;
482}
483
af46800b 484static int dapm_is_shared_kcontrol(struct snd_soc_dapm_context *dapm,
1007da06 485 struct snd_soc_dapm_widget *kcontrolw,
af46800b
SW		 486 const struct snd_kcontrol_new *kcontrol_new,
487 struct snd_kcontrol **kcontrol)
488{
489 struct snd_soc_dapm_widget *w;
490 int i;
491
492 *kcontrol = NULL;
493
494 list_for_each_entry(w, &dapm->card->widgets, list) {
1007da06
SW		 495 if (w == kcontrolw || w->dapm != kcontrolw->dapm)
496 continue;
af46800b
SW		 497 for (i = 0; i < w->num_kcontrols; i++) {
498 if (&w->kcontrol_news[i] == kcontrol_new) {
499 if (w->kcontrols)
500 *kcontrol = w->kcontrols[i];
501 return 1;
502 }
503 }
504 }
505
506 return 0;
507}
508
85762e71
SW		 509/*
510 * Determine if a kcontrol is shared. If it is, look it up. If it isn't,
511 * create it. Either way, add the widget into the control's widget list
512 */
513static int dapm_create_or_share_mixmux_kcontrol(struct snd_soc_dapm_widget *w,
514 int kci, struct snd_soc_dapm_path *path)
2b97eabc 515{
4b80b8c2 516 struct snd_soc_dapm_context *dapm = w->dapm;
12ea2c78 517 struct snd_card *card = dapm->card->snd_card;
efb7ac3f 518 const char *prefix;
85762e71
SW		 519 size_t prefix_len;
520 int shared;
521 struct snd_kcontrol *kcontrol;
fafd2176 522 struct snd_soc_dapm_widget_list *wlist;
85762e71 523 int wlistentries;
fafd2176 524 size_t wlistsize;
85762e71
SW		 525 bool wname_in_long_name, kcname_in_long_name;
526 size_t name_len;
527 char *long_name;
528 const char *name;
529 int ret;
efb7ac3f
MB		 530
531 if (dapm->codec)
532 prefix = dapm->codec->name_prefix;
533 else
534 prefix = NULL;
2b97eabc 535
3e5ff4df
MB		 536 if (prefix)
537 prefix_len = strlen(prefix) + 1;
538 else
539 prefix_len = 0;
540
85762e71
SW		 541 shared = dapm_is_shared_kcontrol(dapm, w, &w->kcontrol_news[kci],
542 &kcontrol);
2b97eabc 543
85762e71
SW		 544 if (kcontrol) {
545 wlist = kcontrol->private_data;
546 wlistentries = wlist->num_widgets + 1;
547 } else {
548 wlist = NULL;
549 wlistentries = 1;
550 }
2b97eabc 551
85762e71
SW		 552 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
553 wlistentries * sizeof(struct snd_soc_dapm_widget *);
554 wlist = krealloc(wlist, wlistsize, GFP_KERNEL);
555 if (wlist == NULL) {
556 dev_err(dapm->dev, "ASoC: can't allocate widget list for %s\n",
557 w->name);
558 return -ENOMEM;
559 }
560 wlist->num_widgets = wlistentries;
561 wlist->widgets[wlistentries - 1] = w;
2b97eabc 562
85762e71
SW		 563 if (!kcontrol) {
564 if (shared) {
565 wname_in_long_name = false;
566 kcname_in_long_name = true;
567 } else {
568 switch (w->id) {
569 case snd_soc_dapm_switch:
570 case snd_soc_dapm_mixer:
571 wname_in_long_name = true;
572 kcname_in_long_name = true;
573 break;
574 case snd_soc_dapm_mixer_named_ctl:
575 wname_in_long_name = false;
576 kcname_in_long_name = true;
577 break;
578 case snd_soc_dapm_mux:
579 case snd_soc_dapm_virt_mux:
580 case snd_soc_dapm_value_mux:
581 wname_in_long_name = true;
582 kcname_in_long_name = false;
583 break;
584 default:
585 kfree(wlist);
586 return -EINVAL;
82cd8764 587 }
85762e71
SW		 588 }
589
590 if (wname_in_long_name && kcname_in_long_name) {
591 name_len = strlen(w->name) - prefix_len + 1 +
592 strlen(w->kcontrol_news[kci].name) + 1;
82cd8764 593
85762e71
SW		 594 long_name = kmalloc(name_len, GFP_KERNEL);
595 if (long_name == NULL) {
596 kfree(wlist);
fafd2176
SW		 597 return -ENOMEM;
598 }
85762e71
SW		 599
600 /*
601 * The control will get a prefix from the control
602 * creation process but we're also using the same
603 * prefix for widgets so cut the prefix off the
604 * front of the widget name.
ca9c1aae 605 */
85762e71
SW		 606 snprintf(long_name, name_len, "%s %s",
607 w->name + prefix_len,
608 w->kcontrol_news[kci].name);
609 long_name[name_len - 1] = '\0';
610
611 name = long_name;
612 } else if (wname_in_long_name) {
613 long_name = NULL;
614 name = w->name + prefix_len;
615 } else {
616 long_name = NULL;
617 name = w->kcontrol_news[kci].name;
618 }
ca9c1aae 619
85762e71
SW		 620 kcontrol = snd_soc_cnew(&w->kcontrol_news[kci], wlist, name,
621 prefix);
622 ret = snd_ctl_add(card, kcontrol);
623 if (ret < 0) {
624 dev_err(dapm->dev,
625 "ASoC: failed to add widget %s dapm kcontrol %s: %d\n",
626 w->name, name, ret);
627 kfree(wlist);
628 kfree(long_name);
629 return ret;
630 }
ca9c1aae 631
85762e71
SW		 632 path->long_name = long_name;
633 }
2b97eabc 634
85762e71
SW		 635 kcontrol->private_data = wlist;
636 w->kcontrols[kci] = kcontrol;
637 path->kcontrol = kcontrol;
ca9c1aae 638
85762e71
SW		 639 return 0;
640}
219b93f5 641
85762e71
SW		 642/* create new dapm mixer control */
643static int dapm_new_mixer(struct snd_soc_dapm_widget *w)
644{
645 int i, ret;
646 struct snd_soc_dapm_path *path;
647
648 /* add kcontrol */
649 for (i = 0; i < w->num_kcontrols; i++) {
650 /* match name */
651 list_for_each_entry(path, &w->sources, list_sink) {
652 /* mixer/mux paths name must match control name */
653 if (path->name != (char *)w->kcontrol_news[i].name)
654 continue;
655
656 if (w->kcontrols[i]) {
657 path->kcontrol = w->kcontrols[i];
658 continue;
2b97eabc 659 }
85762e71
SW		 660
661 ret = dapm_create_or_share_mixmux_kcontrol(w, i, path);
662 if (ret < 0)
663 return ret;
2b97eabc
RP		 664 }
665 }
85762e71
SW		 666
667 return 0;
2b97eabc
RP		 668}
669
670/* create new dapm mux control */
4b80b8c2 671static int dapm_new_mux(struct snd_soc_dapm_widget *w)
2b97eabc 672{
4b80b8c2 673 struct snd_soc_dapm_context *dapm = w->dapm;
85762e71 674 struct snd_soc_dapm_path *path;
af46800b 675 int ret;
2b97eabc 676
af46800b
SW		 677 if (w->num_kcontrols != 1) {
678 dev_err(dapm->dev,
30a6a1a4 679 "ASoC: mux %s has incorrect number of controls\n",
af46800b 680 w->name);
2b97eabc
RP		 681 return -EINVAL;
682 }
683
85762e71
SW		 684 path = list_first_entry(&w->sources, struct snd_soc_dapm_path,
685 list_sink);
686 if (!path) {
687 dev_err(dapm->dev, "ASoC: mux %s has no paths\n", w->name);
688 return -EINVAL;
af46800b 689 }
ce6120cc 690
85762e71
SW		 691 ret = dapm_create_or_share_mixmux_kcontrol(w, 0, path);
692 if (ret < 0)
693 return ret;
fad59888 694
2b97eabc 695 list_for_each_entry(path, &w->sources, list_sink)
85762e71 696 path->kcontrol = w->kcontrols[0];
2b97eabc 697
af46800b 698 return 0;
2b97eabc
RP		 699}
700
701/* create new dapm volume control */
4b80b8c2 702static int dapm_new_pga(struct snd_soc_dapm_widget *w)
2b97eabc 703{
a6c65736 704 if (w->num_kcontrols)
f7d41ae8 705 dev_err(w->dapm->dev,
30a6a1a4 706 "ASoC: PGA controls not supported: '%s'\n", w->name);
2b97eabc 707
a6c65736 708 return 0;
2b97eabc
RP		 709}
710
711/* reset 'walked' bit for each dapm path */
1059ecfa
RT		 712static void dapm_clear_walk_output(struct snd_soc_dapm_context *dapm,
713 struct list_head *sink)
2b97eabc
RP		 714{
715 struct snd_soc_dapm_path *p;
716
1059ecfa
RT		 717 list_for_each_entry(p, sink, list_source) {
718 if (p->walked) {
719 p->walked = 0;
720 dapm_clear_walk_output(dapm, &p->sink->sinks);
721 }
722 }
2b97eabc
RP		 723}
724
1059ecfa
RT		 725static void dapm_clear_walk_input(struct snd_soc_dapm_context *dapm,
726 struct list_head *source)
2b97eabc
RP		 727{
728 struct snd_soc_dapm_path *p;
729
1059ecfa
RT		 730 list_for_each_entry(p, source, list_sink) {
731 if (p->walked) {
732 p->walked = 0;
733 dapm_clear_walk_input(dapm, &p->source->sources);
734 }
735 }
2b97eabc
RP		 736}
737
1059ecfa 738
9949788b
MB		 739/* We implement power down on suspend by checking the power state of
740 * the ALSA card - when we are suspending the ALSA state for the card
741 * is set to D3.
742 */
743static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
744{
12ea2c78 745 int level = snd_power_get_state(widget->dapm->card->snd_card);
9949788b 746
f0fba2ad 747 switch (level) {
9949788b
MB		 748 case SNDRV_CTL_POWER_D3hot:
749 case SNDRV_CTL_POWER_D3cold:
1547aba9 750 if (widget->ignore_suspend)
30a6a1a4 751 dev_dbg(widget->dapm->dev, "ASoC: %s ignoring suspend\n",
f7d41ae8 752 widget->name);
1547aba9 753 return widget->ignore_suspend;
9949788b
MB		 754 default:
755 return 1;
756 }
757}
758
ec2e3031
LG		 759/* add widget to list if it's not already in the list */
760static int dapm_list_add_widget(struct snd_soc_dapm_widget_list **list,
761 struct snd_soc_dapm_widget *w)
762{
763 struct snd_soc_dapm_widget_list *wlist;
764 int wlistsize, wlistentries, i;
765
766 if (*list == NULL)
767 return -EINVAL;
768
769 wlist = *list;
770
771 /* is this widget already in the list */
772 for (i = 0; i < wlist->num_widgets; i++) {
773 if (wlist->widgets[i] == w)
774 return 0;
775 }
776
777 /* allocate some new space */
778 wlistentries = wlist->num_widgets + 1;
779 wlistsize = sizeof(struct snd_soc_dapm_widget_list) +
780 wlistentries * sizeof(struct snd_soc_dapm_widget *);
781 *list = krealloc(wlist, wlistsize, GFP_KERNEL);
782 if (*list == NULL) {
30a6a1a4 783 dev_err(w->dapm->dev, "ASoC: can't allocate widget list for %s\n",
ec2e3031
LG		 784 w->name);
785 return -ENOMEM;
786 }
787 wlist = *list;
788
789 /* insert the widget */
30a6a1a4 790 dev_dbg(w->dapm->dev, "ASoC: added %s in widget list pos %d\n",
ec2e3031
LG		 791 w->name, wlist->num_widgets);
792
793 wlist->widgets[wlist->num_widgets] = w;
794 wlist->num_widgets++;
795 return 1;
796}
797
2b97eabc
RP		 798/*
799 * Recursively check for a completed path to an active or physically connected
800 * output widget. Returns number of complete paths.
801 */
ec2e3031
LG		 802static int is_connected_output_ep(struct snd_soc_dapm_widget *widget,
803 struct snd_soc_dapm_widget_list **list)
2b97eabc
RP		 804{
805 struct snd_soc_dapm_path *path;
806 int con = 0;
807
024dc078
MB		 808 if (widget->outputs >= 0)
809 return widget->outputs;
810
de02d078
MB		 811 DAPM_UPDATE_STAT(widget, path_checks);
812
62ea874a
MB		 813 switch (widget->id) {
814 case snd_soc_dapm_supply:
815 case snd_soc_dapm_regulator_supply:
d7e7eb91 816 case snd_soc_dapm_clock_supply:
246d0a17 817 return 0;
62ea874a
MB		 818 default:
819 break;
820 }
246d0a17 821
010ff262
MB		 822 switch (widget->id) {
823 case snd_soc_dapm_adc:
824 case snd_soc_dapm_aif_out:
888df395 825 case snd_soc_dapm_dai:
024dc078
MB		 826 if (widget->active) {
827 widget->outputs = snd_soc_dapm_suspend_check(widget);
828 return widget->outputs;
829 }
010ff262
MB		 830 default:
831 break;
832 }
2b97eabc
RP		 833
834 if (widget->connected) {
835 /* connected pin ? */
024dc078
MB		 836 if (widget->id == snd_soc_dapm_output && !widget->ext) {
837 widget->outputs = snd_soc_dapm_suspend_check(widget);
838 return widget->outputs;
839 }
2b97eabc
RP		 840
841 /* connected jack or spk ? */
024dc078
MB		 842 if (widget->id == snd_soc_dapm_hp ||
843 widget->id == snd_soc_dapm_spk ||
844 (widget->id == snd_soc_dapm_line &&
845 !list_empty(&widget->sources))) {
846 widget->outputs = snd_soc_dapm_suspend_check(widget);
847 return widget->outputs;
848 }
2b97eabc
RP		 849 }
850
851 list_for_each_entry(path, &widget->sinks, list_source) {
e56235e0
MB		 852 DAPM_UPDATE_STAT(widget, neighbour_checks);
853
bf3a9e13
MB		 854 if (path->weak)
855 continue;
856
8af294b4
MB		 857 if (path->walking)
858 return 1;
859
2b97eabc
RP		 860 if (path->walked)
861 continue;
862
ec2e3031
LG		 863 trace_snd_soc_dapm_output_path(widget, path);
864
2b97eabc
RP		 865 if (path->sink && path->connect) {
866 path->walked = 1;
8af294b4 867 path->walking = 1;
ec2e3031
LG		 868
869 /* do we need to add this widget to the list ? */
870 if (list) {
871 int err;
872 err = dapm_list_add_widget(list, path->sink);
873 if (err < 0) {
30a6a1a4
LG		 874 dev_err(widget->dapm->dev,
875 "ASoC: could not add widget %s\n",
ec2e3031 876 widget->name);
8af294b4 877 path->walking = 0;
ec2e3031
LG		 878 return con;
879 }
880 }
881
882 con += is_connected_output_ep(path->sink, list);
8af294b4
MB		 883
884 path->walking = 0;
2b97eabc
RP		 885 }
886 }
887
024dc078
MB		 888 widget->outputs = con;
889
2b97eabc
RP		 890 return con;
891}
892
893/*
894 * Recursively check for a completed path to an active or physically connected
895 * input widget. Returns number of complete paths.
896 */
ec2e3031
LG		 897static int is_connected_input_ep(struct snd_soc_dapm_widget *widget,
898 struct snd_soc_dapm_widget_list **list)
2b97eabc
RP		 899{
900 struct snd_soc_dapm_path *path;
901 int con = 0;
902
024dc078
MB		 903 if (widget->inputs >= 0)
904 return widget->inputs;
905
de02d078
MB		 906 DAPM_UPDATE_STAT(widget, path_checks);
907
62ea874a
MB		 908 switch (widget->id) {
909 case snd_soc_dapm_supply:
910 case snd_soc_dapm_regulator_supply:
d7e7eb91 911 case snd_soc_dapm_clock_supply:
246d0a17 912 return 0;
62ea874a
MB		 913 default:
914 break;
915 }
246d0a17 916
2b97eabc 917 /* active stream ? */
010ff262
MB		 918 switch (widget->id) {
919 case snd_soc_dapm_dac:
920 case snd_soc_dapm_aif_in:
888df395 921 case snd_soc_dapm_dai:
024dc078
MB		 922 if (widget->active) {
923 widget->inputs = snd_soc_dapm_suspend_check(widget);
924 return widget->inputs;
925 }
010ff262
MB		 926 default:
927 break;
928 }
2b97eabc
RP		 929
930 if (widget->connected) {
931 /* connected pin ? */
024dc078
MB		 932 if (widget->id == snd_soc_dapm_input && !widget->ext) {
933 widget->inputs = snd_soc_dapm_suspend_check(widget);
934 return widget->inputs;
935 }
2b97eabc
RP		 936
937 /* connected VMID/Bias for lower pops */
024dc078
MB		 938 if (widget->id == snd_soc_dapm_vmid) {
939 widget->inputs = snd_soc_dapm_suspend_check(widget);
940 return widget->inputs;
941 }
2b97eabc
RP		 942
943 /* connected jack ? */
eaeae5d9 944 if (widget->id == snd_soc_dapm_mic ||
024dc078
MB		 945 (widget->id == snd_soc_dapm_line &&
946 !list_empty(&widget->sinks))) {
947 widget->inputs = snd_soc_dapm_suspend_check(widget);
948 return widget->inputs;
949 }
950
1ab97c8c
MB		 951 /* signal generator */
952 if (widget->id == snd_soc_dapm_siggen) {
953 widget->inputs = snd_soc_dapm_suspend_check(widget);
954 return widget->inputs;
955 }
2b97eabc
RP		 956 }
957
958 list_for_each_entry(path, &widget->sources, list_sink) {
e56235e0
MB		 959 DAPM_UPDATE_STAT(widget, neighbour_checks);
960
bf3a9e13
MB		 961 if (path->weak)
962 continue;
963
8af294b4
MB		 964 if (path->walking)
965 return 1;
966
2b97eabc
RP		 967 if (path->walked)
968 continue;
969
ec2e3031
LG		 970 trace_snd_soc_dapm_input_path(widget, path);
971
2b97eabc
RP		 972 if (path->source && path->connect) {
973 path->walked = 1;
8af294b4 974 path->walking = 1;
ec2e3031
LG		 975
976 /* do we need to add this widget to the list ? */
977 if (list) {
978 int err;
90c6ce0d 979 err = dapm_list_add_widget(list, path->source);
ec2e3031 980 if (err < 0) {
30a6a1a4
LG		 981 dev_err(widget->dapm->dev,
982 "ASoC: could not add widget %s\n",
ec2e3031 983 widget->name);
8af294b4 984 path->walking = 0;
ec2e3031
LG		 985 return con;
986 }
987 }
988
989 con += is_connected_input_ep(path->source, list);
8af294b4
MB		 990
991 path->walking = 0;
2b97eabc
RP		 992 }
993 }
994
024dc078
MB		 995 widget->inputs = con;
996
2b97eabc
RP		 997 return con;
998}
999
ec2e3031
LG		 1000/**
1001 * snd_soc_dapm_get_connected_widgets - query audio path and it's widgets.
1002 * @dai: the soc DAI.
1003 * @stream: stream direction.
1004 * @list: list of active widgets for this stream.
1005 *
1006 * Queries DAPM graph as to whether an valid audio stream path exists for
1007 * the initial stream specified by name. This takes into account
1008 * current mixer and mux kcontrol settings. Creates list of valid widgets.
1009 *
1010 * Returns the number of valid paths or negative error.
1011 */
1012int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
1013 struct snd_soc_dapm_widget_list **list)
1014{
1015 struct snd_soc_card *card = dai->card;
1016 int paths;
1017
1018 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
1019 dapm_reset(card);
1020
1059ecfa 1021 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
ec2e3031 1022 paths = is_connected_output_ep(dai->playback_widget, list);
1059ecfa
RT		 1023 dapm_clear_walk_output(&card->dapm,
1024 &dai->playback_widget->sinks);
1025 } else {
d298caae 1026 paths = is_connected_input_ep(dai->capture_widget, list);
1059ecfa
RT		 1027 dapm_clear_walk_input(&card->dapm,
1028 &dai->capture_widget->sources);
1029 }
ec2e3031
LG		 1030
1031 trace_snd_soc_dapm_connected(paths, stream);
ec2e3031
LG		 1032 mutex_unlock(&card->dapm_mutex);
1033
1034 return paths;
1035}
1036
e2be2ccf
JN		 1037/*
1038 * Handler for generic register modifier widget.
1039 */
1040int dapm_reg_event(struct snd_soc_dapm_widget *w,
1041 struct snd_kcontrol *kcontrol, int event)
1042{
1043 unsigned int val;
1044
1045 if (SND_SOC_DAPM_EVENT_ON(event))
1046 val = w->on_val;
1047 else
1048 val = w->off_val;
1049
49575fb5 1050 soc_widget_update_bits_locked(w, -(w->reg + 1),
e2be2ccf
JN		 1051 w->mask << w->shift, val << w->shift);
1052
1053 return 0;
1054}
11589418 1055EXPORT_SYMBOL_GPL(dapm_reg_event);
e2be2ccf 1056
62ea874a
MB		 1057/*
1058 * Handler for regulator supply widget.
1059 */
1060int dapm_regulator_event(struct snd_soc_dapm_widget *w,
1061 struct snd_kcontrol *kcontrol, int event)
1062{
c05b84d1
MB		 1063 int ret;
1064
1065 if (SND_SOC_DAPM_EVENT_ON(event)) {
1066 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) {
8784c77a 1067 ret = regulator_allow_bypass(w->regulator, false);
c05b84d1
MB		 1068 if (ret != 0)
1069 dev_warn(w->dapm->dev,
30a6a1a4 1070 "ASoC: Failed to bypass %s: %d\n",
c05b84d1
MB		 1071 w->name, ret);
1072 }
1073
a3cc056b 1074 return regulator_enable(w->regulator);
c05b84d1
MB		 1075 } else {
1076 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) {
8784c77a 1077 ret = regulator_allow_bypass(w->regulator, true);
c05b84d1
MB		 1078 if (ret != 0)
1079 dev_warn(w->dapm->dev,
30a6a1a4 1080 "ASoC: Failed to unbypass %s: %d\n",
c05b84d1
MB		 1081 w->name, ret);
1082 }
1083
a3cc056b 1084 return regulator_disable_deferred(w->regulator, w->shift);
c05b84d1 1085 }
62ea874a
MB		 1086}
1087EXPORT_SYMBOL_GPL(dapm_regulator_event);
1088
d7e7eb91
OL		 1089/*
1090 * Handler for clock supply widget.
1091 */
1092int dapm_clock_event(struct snd_soc_dapm_widget *w,
1093 struct snd_kcontrol *kcontrol, int event)
1094{
1095 if (!w->clk)
1096 return -EIO;
1097
ec02995a 1098#ifdef CONFIG_HAVE_CLK
d7e7eb91 1099 if (SND_SOC_DAPM_EVENT_ON(event)) {
37c1b927 1100 return clk_prepare_enable(w->clk);
d7e7eb91 1101 } else {
37c1b927 1102 clk_disable_unprepare(w->clk);
d7e7eb91
OL		 1103 return 0;
1104 }
ec02995a 1105#endif
98b3cf12 1106 return 0;
d7e7eb91
OL		 1107}
1108EXPORT_SYMBOL_GPL(dapm_clock_event);
1109
d805002b
MB		 1110static int dapm_widget_power_check(struct snd_soc_dapm_widget *w)
1111{
9b8a83b2
MB		 1112 if (w->power_checked)
1113 return w->new_power;
1114
d805002b 1115 if (w->force)
9b8a83b2 1116 w->new_power = 1;
d805002b 1117 else
9b8a83b2
MB		 1118 w->new_power = w->power_check(w);
1119
1120 w->power_checked = true;
1121
1122 return w->new_power;
d805002b
MB		 1123}
1124
cd0f2d47
MB		 1125/* Generic check to see if a widget should be powered.
1126 */
1127static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
1128{
1129 int in, out;
1130
de02d078
MB		 1131 DAPM_UPDATE_STAT(w, power_checks);
1132
ec2e3031 1133 in = is_connected_input_ep(w, NULL);
1059ecfa 1134 dapm_clear_walk_input(w->dapm, &w->sources);
ec2e3031 1135 out = is_connected_output_ep(w, NULL);
1059ecfa 1136 dapm_clear_walk_output(w->dapm, &w->sinks);
cd0f2d47
MB		 1137 return out != 0 && in != 0;
1138}
1139
888df395
MB		 1140static int dapm_dai_check_power(struct snd_soc_dapm_widget *w)
1141{
1142 DAPM_UPDATE_STAT(w, power_checks);
1143
1eee1b38
MB		 1144 if (w->active)
1145 return w->active;
1146
1147 return dapm_generic_check_power(w);
888df395
MB		 1148}
1149
6ea31b9f
MB		 1150/* Check to see if an ADC has power */
1151static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
1152{
1153 int in;
1154
de02d078
MB		 1155 DAPM_UPDATE_STAT(w, power_checks);
1156
6ea31b9f 1157 if (w->active) {
ec2e3031 1158 in = is_connected_input_ep(w, NULL);
1059ecfa 1159 dapm_clear_walk_input(w->dapm, &w->sources);
6ea31b9f
MB		 1160 return in != 0;
1161 } else {
1162 return dapm_generic_check_power(w);
1163 }
1164}
1165
1166/* Check to see if a DAC has power */
1167static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
1168{
1169 int out;
1170
de02d078
MB		 1171 DAPM_UPDATE_STAT(w, power_checks);
1172
6ea31b9f 1173 if (w->active) {
ec2e3031 1174 out = is_connected_output_ep(w, NULL);
1059ecfa 1175 dapm_clear_walk_output(w->dapm, &w->sinks);
6ea31b9f
MB		 1176 return out != 0;
1177 } else {
1178 return dapm_generic_check_power(w);
1179 }
1180}
1181
246d0a17
MB		 1182/* Check to see if a power supply is needed */
1183static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
1184{
1185 struct snd_soc_dapm_path *path;
246d0a17 1186
de02d078
MB		 1187 DAPM_UPDATE_STAT(w, power_checks);
1188
246d0a17
MB		 1189 /* Check if one of our outputs is connected */
1190 list_for_each_entry(path, &w->sinks, list_source) {
a8fdac83
MB		 1191 DAPM_UPDATE_STAT(w, neighbour_checks);
1192
bf3a9e13
MB		 1193 if (path->weak)
1194 continue;
1195
215edda3
MB		 1196 if (path->connected &&
1197 !path->connected(path->source, path->sink))
1198 continue;
1199
3017358a
MB		 1200 if (!path->sink)
1201 continue;
1202
f68d7e16
MB		 1203 if (dapm_widget_power_check(path->sink))
1204 return 1;
246d0a17
MB		 1205 }
1206
f68d7e16 1207 return 0;
246d0a17
MB		 1208}
1209
35c64bca
MB		 1210static int dapm_always_on_check_power(struct snd_soc_dapm_widget *w)
1211{
1212 return 1;
1213}
1214
38357ab2
MB		 1215static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
1216 struct snd_soc_dapm_widget *b,
828a842f 1217 bool power_up)
42aa3418 1218{
828a842f
MB		 1219 int *sort;
1220
1221 if (power_up)
1222 sort = dapm_up_seq;
1223 else
1224 sort = dapm_down_seq;
1225
38357ab2
MB		 1226 if (sort[a->id] != sort[b->id])
1227 return sort[a->id] - sort[b->id];
20e4859d
MB		 1228 if (a->subseq != b->subseq) {
1229 if (power_up)
1230 return a->subseq - b->subseq;
1231 else
1232 return b->subseq - a->subseq;
1233 }
b22ead2a
MB		 1234 if (a->reg != b->reg)
1235 return a->reg - b->reg;
84dab567
MB		 1236 if (a->dapm != b->dapm)
1237 return (unsigned long)a->dapm - (unsigned long)b->dapm;
42aa3418 1238
38357ab2
MB		 1239 return 0;
1240}
42aa3418 1241
38357ab2
MB		 1242/* Insert a widget in order into a DAPM power sequence. */
1243static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
1244 struct list_head *list,
828a842f 1245 bool power_up)
38357ab2
MB		 1246{
1247 struct snd_soc_dapm_widget *w;
1248
1249 list_for_each_entry(w, list, power_list)
828a842f 1250 if (dapm_seq_compare(new_widget, w, power_up) < 0) {
38357ab2
MB		 1251 list_add_tail(&new_widget->power_list, &w->power_list);
1252 return;
1253 }
1254
1255 list_add_tail(&new_widget->power_list, list);
1256}
1257
68f89ad8
MB		 1258static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
1259 struct snd_soc_dapm_widget *w, int event)
1260{
1261 struct snd_soc_card *card = dapm->card;
1262 const char *ev_name;
1263 int power, ret;
1264
1265 switch (event) {
1266 case SND_SOC_DAPM_PRE_PMU:
1267 ev_name = "PRE_PMU";
1268 power = 1;
1269 break;
1270 case SND_SOC_DAPM_POST_PMU:
1271 ev_name = "POST_PMU";
1272 power = 1;
1273 break;
1274 case SND_SOC_DAPM_PRE_PMD:
1275 ev_name = "PRE_PMD";
1276 power = 0;
1277 break;
1278 case SND_SOC_DAPM_POST_PMD:
1279 ev_name = "POST_PMD";
1280 power = 0;
1281 break;
1282 default:
1283 BUG();
1284 return;
1285 }
1286
1287 if (w->power != power)
1288 return;
1289
1290 if (w->event && (w->event_flags & event)) {
1291 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
1292 w->name, ev_name);
84e90930 1293 trace_snd_soc_dapm_widget_event_start(w, event);
68f89ad8 1294 ret = w->event(w, NULL, event);
84e90930 1295 trace_snd_soc_dapm_widget_event_done(w, event);
68f89ad8 1296 if (ret < 0)
30a6a1a4 1297 dev_err(dapm->dev, "ASoC: %s: %s event failed: %d\n",
68f89ad8
MB		 1298 ev_name, w->name, ret);
1299 }
1300}
1301
b22ead2a 1302/* Apply the coalesced changes from a DAPM sequence */
ce6120cc 1303static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
b22ead2a 1304 struct list_head *pending)
163cac06 1305{
3a45b867 1306 struct snd_soc_card *card = dapm->card;
68f89ad8
MB		 1307 struct snd_soc_dapm_widget *w;
1308 int reg, power;
b22ead2a
MB		 1309 unsigned int value = 0;
1310 unsigned int mask = 0;
1311 unsigned int cur_mask;
1312
1313 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
1314 power_list)->reg;
1315
1316 list_for_each_entry(w, pending, power_list) {
1317 cur_mask = 1 << w->shift;
1318 BUG_ON(reg != w->reg);
1319
1320 if (w->invert)
1321 power = !w->power;
1322 else
1323 power = w->power;
1324
1325 mask |= cur_mask;
1326 if (power)
1327 value |= cur_mask;
1328
fd8d3bc0 1329 pop_dbg(dapm->dev, card->pop_time,
b22ead2a
MB		 1330 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
1331 w->name, reg, value, mask);
81628103 1332
68f89ad8
MB		 1333 /* Check for events */
1334 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
1335 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
81628103
MB		 1336 }
1337
1338 if (reg >= 0) {
29376bc7
MB		 1339 /* Any widget will do, they should all be updating the
1340 * same register.
1341 */
1342 w = list_first_entry(pending, struct snd_soc_dapm_widget,
1343 power_list);
1344
fd8d3bc0 1345 pop_dbg(dapm->dev, card->pop_time,
81628103 1346 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
3a45b867
JN		 1347 value, mask, reg, card->pop_time);
1348 pop_wait(card->pop_time);
49575fb5 1349 soc_widget_update_bits_locked(w, reg, mask, value);
b22ead2a
MB		 1350 }
1351
81628103 1352 list_for_each_entry(w, pending, power_list) {
68f89ad8
MB		 1353 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
1354 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
81628103 1355 }
b22ead2a 1356}
42aa3418 1357
b22ead2a
MB		 1358/* Apply a DAPM power sequence.
1359 *
1360 * We walk over a pre-sorted list of widgets to apply power to. In
1361 * order to minimise the number of writes to the device required
1362 * multiple widgets will be updated in a single write where possible.
1363 * Currently anything that requires more than a single write is not
1364 * handled.
1365 */
ce6120cc 1366static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
828a842f 1367 struct list_head *list, int event, bool power_up)
b22ead2a
MB		 1368{
1369 struct snd_soc_dapm_widget *w, *n;
1370 LIST_HEAD(pending);
1371 int cur_sort = -1;
20e4859d 1372 int cur_subseq = -1;
b22ead2a 1373 int cur_reg = SND_SOC_NOPM;
7be31be8 1374 struct snd_soc_dapm_context *cur_dapm = NULL;
474b62d6 1375 int ret, i;
828a842f
MB		 1376 int *sort;
1377
1378 if (power_up)
1379 sort = dapm_up_seq;
1380 else
1381 sort = dapm_down_seq;
163cac06 1382
b22ead2a
MB		 1383 list_for_each_entry_safe(w, n, list, power_list) {
1384 ret = 0;
1385
1386 /* Do we need to apply any queued changes? */
7be31be8 1387 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
20e4859d 1388 w->dapm != cur_dapm || w->subseq != cur_subseq) {
b22ead2a 1389 if (!list_empty(&pending))
7be31be8 1390 dapm_seq_run_coalesced(cur_dapm, &pending);
b22ead2a 1391
474b62d6
MB		 1392 if (cur_dapm && cur_dapm->seq_notifier) {
1393 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1394 if (sort[i] == cur_sort)
1395 cur_dapm->seq_notifier(cur_dapm,
f85a9e0d
MB		 1396 i,
1397 cur_subseq);
474b62d6
MB		 1398 }
1399
b22ead2a
MB		 1400 INIT_LIST_HEAD(&pending);
1401 cur_sort = -1;
b0b3e6f8 1402 cur_subseq = INT_MIN;
b22ead2a 1403 cur_reg = SND_SOC_NOPM;
7be31be8 1404 cur_dapm = NULL;
b22ead2a
MB		 1405 }
1406
163cac06
MB		 1407 switch (w->id) {
1408 case snd_soc_dapm_pre:
1409 if (!w->event)
b22ead2a
MB		 1410 list_for_each_entry_safe_continue(w, n, list,
1411 power_list);
163cac06 1412
b22ead2a 1413 if (event == SND_SOC_DAPM_STREAM_START)
163cac06
MB		 1414 ret = w->event(w,
1415 NULL, SND_SOC_DAPM_PRE_PMU);
b22ead2a 1416 else if (event == SND_SOC_DAPM_STREAM_STOP)
163cac06
MB		 1417 ret = w->event(w,
1418 NULL, SND_SOC_DAPM_PRE_PMD);
163cac06
MB		 1419 break;
1420
1421 case snd_soc_dapm_post:
1422 if (!w->event)
b22ead2a
MB		 1423 list_for_each_entry_safe_continue(w, n, list,
1424 power_list);
163cac06 1425
b22ead2a 1426 if (event == SND_SOC_DAPM_STREAM_START)
163cac06
MB		 1427 ret = w->event(w,
1428 NULL, SND_SOC_DAPM_POST_PMU);
b22ead2a 1429 else if (event == SND_SOC_DAPM_STREAM_STOP)
163cac06
MB		 1430 ret = w->event(w,
1431 NULL, SND_SOC_DAPM_POST_PMD);
163cac06
MB		 1432 break;
1433
b22ead2a 1434 default:
81628103
MB		 1435 /* Queue it up for application */
1436 cur_sort = sort[w->id];
20e4859d 1437 cur_subseq = w->subseq;
81628103 1438 cur_reg = w->reg;
7be31be8 1439 cur_dapm = w->dapm;
81628103
MB		 1440 list_move(&w->power_list, &pending);
1441 break;
163cac06 1442 }
b22ead2a
MB		 1443
1444 if (ret < 0)
f7d41ae8 1445 dev_err(w->dapm->dev,
30a6a1a4 1446 "ASoC: Failed to apply widget power: %d\n", ret);
6ea31b9f 1447 }
b22ead2a
MB		 1448
1449 if (!list_empty(&pending))
28e86808 1450 dapm_seq_run_coalesced(cur_dapm, &pending);
474b62d6
MB		 1451
1452 if (cur_dapm && cur_dapm->seq_notifier) {
1453 for (i = 0; i < ARRAY_SIZE(dapm_up_seq); i++)
1454 if (sort[i] == cur_sort)
1455 cur_dapm->seq_notifier(cur_dapm,
f85a9e0d 1456 i, cur_subseq);
474b62d6 1457 }
42aa3418
MB		 1458}
1459
97404f2e
MB		 1460static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
1461{
1462 struct snd_soc_dapm_update *update = dapm->update;
1463 struct snd_soc_dapm_widget *w;
1464 int ret;
1465
1466 if (!update)
1467 return;
1468
1469 w = update->widget;
1470
1471 if (w->event &&
1472 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
1473 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
1474 if (ret != 0)
30a6a1a4 1475 dev_err(dapm->dev, "ASoC: %s DAPM pre-event failed: %d\n",
97404f2e
MB		 1476 w->name, ret);
1477 }
1478
49575fb5 1479 ret = soc_widget_update_bits_locked(w, update->reg, update->mask,
97404f2e
MB		 1480 update->val);
1481 if (ret < 0)
30a6a1a4
LG		 1482 dev_err(dapm->dev, "ASoC: %s DAPM update failed: %d\n",
1483 w->name, ret);
97404f2e
MB		 1484
1485 if (w->event &&
1486 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
1487 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
1488 if (ret != 0)
30a6a1a4 1489 dev_err(dapm->dev, "ASoC: %s DAPM post-event failed: %d\n",
97404f2e
MB		 1490 w->name, ret);
1491 }
1492}
1493
9d0624a7
MB		 1494/* Async callback run prior to DAPM sequences - brings to _PREPARE if
1495 * they're changing state.
1496 */
1497static void dapm_pre_sequence_async(void *data, async_cookie_t cookie)
1498{
1499 struct snd_soc_dapm_context *d = data;
1500 int ret;
1501
56fba41f
MB		 1502 /* If we're off and we're not supposed to be go into STANDBY */
1503 if (d->bias_level == SND_SOC_BIAS_OFF &&
1504 d->target_bias_level != SND_SOC_BIAS_OFF) {
f1aac484
MB		 1505 if (d->dev)
1506 pm_runtime_get_sync(d->dev);
1507
9d0624a7
MB		 1508 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1509 if (ret != 0)
1510 dev_err(d->dev,
30a6a1a4 1511 "ASoC: Failed to turn on bias: %d\n", ret);
9d0624a7
MB		 1512 }
1513
56fba41f
MB		 1514 /* Prepare for a STADDBY->ON or ON->STANDBY transition */
1515 if (d->bias_level != d->target_bias_level) {
9d0624a7
MB		 1516 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_PREPARE);
1517 if (ret != 0)
1518 dev_err(d->dev,
30a6a1a4 1519 "ASoC: Failed to prepare bias: %d\n", ret);
9d0624a7
MB		 1520 }
1521}
1522
1523/* Async callback run prior to DAPM sequences - brings to their final
1524 * state.
1525 */
1526static void dapm_post_sequence_async(void *data, async_cookie_t cookie)
1527{
1528 struct snd_soc_dapm_context *d = data;
1529 int ret;
1530
1531 /* If we just powered the last thing off drop to standby bias */
56fba41f
MB		 1532 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1533 (d->target_bias_level == SND_SOC_BIAS_STANDBY ||
1534 d->target_bias_level == SND_SOC_BIAS_OFF)) {
9d0624a7
MB		 1535 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_STANDBY);
1536 if (ret != 0)
30a6a1a4 1537 dev_err(d->dev, "ASoC: Failed to apply standby bias: %d\n",
9d0624a7
MB		 1538 ret);
1539 }
97404f2e 1540
9d0624a7 1541 /* If we're in standby and can support bias off then do that */
56fba41f
MB		 1542 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1543 d->target_bias_level == SND_SOC_BIAS_OFF) {
9d0624a7
MB		 1544 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_OFF);
1545 if (ret != 0)
30a6a1a4
LG		 1546 dev_err(d->dev, "ASoC: Failed to turn off bias: %d\n",
1547 ret);
f1aac484
MB		 1548
1549 if (d->dev)
fb644e9c 1550 pm_runtime_put(d->dev);
9d0624a7
MB		 1551 }
1552
1553 /* If we just powered up then move to active bias */
56fba41f
MB		 1554 if (d->bias_level == SND_SOC_BIAS_PREPARE &&
1555 d->target_bias_level == SND_SOC_BIAS_ON) {
9d0624a7
MB		 1556 ret = snd_soc_dapm_set_bias_level(d, SND_SOC_BIAS_ON);
1557 if (ret != 0)
30a6a1a4 1558 dev_err(d->dev, "ASoC: Failed to apply active bias: %d\n",
9d0624a7
MB		 1559 ret);
1560 }
1561}
97404f2e 1562
fe4fda5d
MB		 1563static void dapm_widget_set_peer_power(struct snd_soc_dapm_widget *peer,
1564 bool power, bool connect)
1565{
1566 /* If a connection is being made or broken then that update
1567 * will have marked the peer dirty, otherwise the widgets are
1568 * not connected and this update has no impact. */
1569 if (!connect)
1570 return;
1571
1572 /* If the peer is already in the state we're moving to then we
1573 * won't have an impact on it. */
1574 if (power != peer->power)
75c1f891 1575 dapm_mark_dirty(peer, "peer state change");
fe4fda5d
MB		 1576}
1577
05623c43
MB		 1578static void dapm_widget_set_power(struct snd_soc_dapm_widget *w, bool power,
1579 struct list_head *up_list,
1580 struct list_head *down_list)
1581{
db432b41
MB		 1582 struct snd_soc_dapm_path *path;
1583
05623c43
MB		 1584 if (w->power == power)
1585 return;
1586
1587 trace_snd_soc_dapm_widget_power(w, power);
1588
db432b41 1589 /* If we changed our power state perhaps our neigbours changed
fe4fda5d 1590 * also.
db432b41
MB		 1591 */
1592 list_for_each_entry(path, &w->sources, list_sink) {
1593 if (path->source) {
fe4fda5d
MB		 1594 dapm_widget_set_peer_power(path->source, power,
1595 path->connect);
db432b41
MB		 1596 }
1597 }
f3bf3e45
MB		 1598 switch (w->id) {
1599 case snd_soc_dapm_supply:
62ea874a 1600 case snd_soc_dapm_regulator_supply:
d7e7eb91 1601 case snd_soc_dapm_clock_supply:
f3bf3e45
MB		 1602 /* Supplies can't affect their outputs, only their inputs */
1603 break;
1604 default:
1605 list_for_each_entry(path, &w->sinks, list_source) {
1606 if (path->sink) {
1607 dapm_widget_set_peer_power(path->sink, power,
1608 path->connect);
1609 }
db432b41 1610 }
f3bf3e45 1611 break;
db432b41
MB		 1612 }
1613
05623c43
MB		 1614 if (power)
1615 dapm_seq_insert(w, up_list, true);
1616 else
1617 dapm_seq_insert(w, down_list, false);
1618
1619 w->power = power;
1620}
1621
7c81beb0
MB		 1622static void dapm_power_one_widget(struct snd_soc_dapm_widget *w,
1623 struct list_head *up_list,
1624 struct list_head *down_list)
1625{
7c81beb0
MB		 1626 int power;
1627
1628 switch (w->id) {
1629 case snd_soc_dapm_pre:
1630 dapm_seq_insert(w, down_list, false);
1631 break;
1632 case snd_soc_dapm_post:
1633 dapm_seq_insert(w, up_list, true);
1634 break;
1635
1636 default:
d805002b 1637 power = dapm_widget_power_check(w);
7c81beb0 1638
05623c43 1639 dapm_widget_set_power(w, power, up_list, down_list);
7c81beb0
MB		 1640 break;
1641 }
1642}
1643
2b97eabc
RP		 1644/*
1645 * Scan each dapm widget for complete audio path.
1646 * A complete path is a route that has valid endpoints i.e.:-
1647 *
1648 * o DAC to output pin.
1649 * o Input Pin to ADC.
1650 * o Input pin to Output pin (bypass, sidetone)
1651 * o DAC to ADC (loopback).
1652 */
ce6120cc 1653static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
2b97eabc 1654{
12ea2c78 1655 struct snd_soc_card *card = dapm->card;
2b97eabc 1656 struct snd_soc_dapm_widget *w;
7be31be8 1657 struct snd_soc_dapm_context *d;
291f3bbc
MB		 1658 LIST_HEAD(up_list);
1659 LIST_HEAD(down_list);
2955b47d 1660 ASYNC_DOMAIN_EXCLUSIVE(async_domain);
56fba41f 1661 enum snd_soc_bias_level bias;
6d3ddc81 1662
84e90930
MB		 1663 trace_snd_soc_dapm_start(card);
1664
56fba41f 1665 list_for_each_entry(d, &card->dapm_list, list) {
497098be
MB		 1666 if (d->idle_bias_off)
1667 d->target_bias_level = SND_SOC_BIAS_OFF;
1668 else
1669 d->target_bias_level = SND_SOC_BIAS_STANDBY;
56fba41f 1670 }
7be31be8 1671
6c120e19 1672 dapm_reset(card);
9b8a83b2 1673
6d3ddc81 1674 /* Check which widgets we need to power and store them in
db432b41
MB		 1675 * lists indicating if they should be powered up or down. We
1676 * only check widgets that have been flagged as dirty but note
1677 * that new widgets may be added to the dirty list while we
1678 * iterate.
6d3ddc81 1679 */
db432b41 1680 list_for_each_entry(w, &card->dapm_dirty, dirty) {
7c81beb0 1681 dapm_power_one_widget(w, &up_list, &down_list);
2b97eabc
RP		 1682 }
1683
f9de6d74 1684 list_for_each_entry(w, &card->widgets, list) {
0ff97ebf
MB		 1685 switch (w->id) {
1686 case snd_soc_dapm_pre:
1687 case snd_soc_dapm_post:
1688 /* These widgets always need to be powered */
1689 break;
1690 default:
1691 list_del_init(&w->dirty);
1692 break;
1693 }
db432b41 1694
f9de6d74
MB		 1695 if (w->power) {
1696 d = w->dapm;
1697
1698 /* Supplies and micbiases only bring the
1699 * context up to STANDBY as unless something
1700 * else is active and passing audio they
afe62367
MB		 1701 * generally don't require full power. Signal
1702 * generators are virtual pins and have no
1703 * power impact themselves.
f9de6d74
MB		 1704 */
1705 switch (w->id) {
afe62367
MB		 1706 case snd_soc_dapm_siggen:
1707 break;
f9de6d74 1708 case snd_soc_dapm_supply:
62ea874a 1709 case snd_soc_dapm_regulator_supply:
d7e7eb91 1710 case snd_soc_dapm_clock_supply:
f9de6d74
MB		 1711 case snd_soc_dapm_micbias:
1712 if (d->target_bias_level < SND_SOC_BIAS_STANDBY)
1713 d->target_bias_level = SND_SOC_BIAS_STANDBY;
1714 break;
1715 default:
1716 d->target_bias_level = SND_SOC_BIAS_ON;
1717 break;
1718 }
1719 }
1720
1721 }
1722
85a843c5
MB		 1723 /* Force all contexts in the card to the same bias state if
1724 * they're not ground referenced.
1725 */
56fba41f 1726 bias = SND_SOC_BIAS_OFF;
52ba67bf 1727 list_for_each_entry(d, &card->dapm_list, list)
56fba41f
MB		 1728 if (d->target_bias_level > bias)
1729 bias = d->target_bias_level;
52ba67bf 1730 list_for_each_entry(d, &card->dapm_list, list)
85a843c5
MB		 1731 if (!d->idle_bias_off)
1732 d->target_bias_level = bias;
52ba67bf 1733
de02d078 1734 trace_snd_soc_dapm_walk_done(card);
52ba67bf 1735
9d0624a7
MB		 1736 /* Run all the bias changes in parallel */
1737 list_for_each_entry(d, &dapm->card->dapm_list, list)
1738 async_schedule_domain(dapm_pre_sequence_async, d,
1739 &async_domain);
1740 async_synchronize_full_domain(&async_domain);
452c5eaa 1741
6d3ddc81 1742 /* Power down widgets first; try to avoid amplifying pops. */
828a842f 1743 dapm_seq_run(dapm, &down_list, event, false);
2b97eabc 1744
97404f2e
MB		 1745 dapm_widget_update(dapm);
1746
6d3ddc81 1747 /* Now power up. */
828a842f 1748 dapm_seq_run(dapm, &up_list, event, true);
2b97eabc 1749
9d0624a7
MB		 1750 /* Run all the bias changes in parallel */
1751 list_for_each_entry(d, &dapm->card->dapm_list, list)
1752 async_schedule_domain(dapm_post_sequence_async, d,
1753 &async_domain);
1754 async_synchronize_full_domain(&async_domain);
452c5eaa 1755
8078d87f
LG		 1756 /* do we need to notify any clients that DAPM event is complete */
1757 list_for_each_entry(d, &card->dapm_list, list) {
1758 if (d->stream_event)
1759 d->stream_event(d, event);
1760 }
1761
fd8d3bc0
JN		 1762 pop_dbg(dapm->dev, card->pop_time,
1763 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
3a45b867 1764 pop_wait(card->pop_time);
cb507e7e 1765
84e90930
MB		 1766 trace_snd_soc_dapm_done(card);
1767
42aa3418 1768 return 0;
2b97eabc
RP		 1769}
1770
79fb9387 1771#ifdef CONFIG_DEBUG_FS
79fb9387
MB		 1772static ssize_t dapm_widget_power_read_file(struct file *file,
1773 char __user *user_buf,
1774 size_t count, loff_t *ppos)
1775{
1776 struct snd_soc_dapm_widget *w = file->private_data;
1777 char *buf;
1778 int in, out;
1779 ssize_t ret;
1780 struct snd_soc_dapm_path *p = NULL;
1781
1782 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1783 if (!buf)
1784 return -ENOMEM;
1785
ec2e3031 1786 in = is_connected_input_ep(w, NULL);
1059ecfa 1787 dapm_clear_walk_input(w->dapm, &w->sources);
ec2e3031 1788 out = is_connected_output_ep(w, NULL);
1059ecfa 1789 dapm_clear_walk_output(w->dapm, &w->sinks);
79fb9387 1790
f13ebada
MB		 1791 ret = snprintf(buf, PAGE_SIZE, "%s: %s%s in %d out %d",
1792 w->name, w->power ? "On" : "Off",
1793 w->force ? " (forced)" : "", in, out);
79fb9387 1794
d033c36a
MB		 1795 if (w->reg >= 0)
1796 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1797 " - R%d(0x%x) bit %d",
1798 w->reg, w->reg, w->shift);
1799
1800 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1801
3eef08ba
MB		 1802 if (w->sname)
1803 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1804 w->sname,
1805 w->active ? "active" : "inactive");
79fb9387
MB		 1806
1807 list_for_each_entry(p, &w->sources, list_sink) {
215edda3
MB		 1808 if (p->connected && !p->connected(w, p->sink))
1809 continue;
1810
79fb9387
MB		 1811 if (p->connect)
1812 ret += snprintf(buf + ret, PAGE_SIZE - ret,
67f5ed6e 1813 " in \"%s\" \"%s\"\n",
79fb9387
MB		 1814 p->name ? p->name : "static",
1815 p->source->name);
1816 }
1817 list_for_each_entry(p, &w->sinks, list_source) {
215edda3
MB		 1818 if (p->connected && !p->connected(w, p->sink))
1819 continue;
1820
79fb9387
MB		 1821 if (p->connect)
1822 ret += snprintf(buf + ret, PAGE_SIZE - ret,
67f5ed6e 1823 " out \"%s\" \"%s\"\n",
79fb9387
MB		 1824 p->name ? p->name : "static",
1825 p->sink->name);
1826 }
1827
1828 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1829
1830 kfree(buf);
1831 return ret;
1832}
1833
1834static const struct file_operations dapm_widget_power_fops = {
234e3405 1835 .open = simple_open,
79fb9387 1836 .read = dapm_widget_power_read_file,
6038f373 1837 .llseek = default_llseek,
79fb9387
MB		 1838};
1839
ef49e4fa
MB		 1840static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
1841 size_t count, loff_t *ppos)
1842{
1843 struct snd_soc_dapm_context *dapm = file->private_data;
1844 char *level;
1845
1846 switch (dapm->bias_level) {
1847 case SND_SOC_BIAS_ON:
1848 level = "On\n";
1849 break;
1850 case SND_SOC_BIAS_PREPARE:
1851 level = "Prepare\n";
1852 break;
1853 case SND_SOC_BIAS_STANDBY:
1854 level = "Standby\n";
1855 break;
1856 case SND_SOC_BIAS_OFF:
1857 level = "Off\n";
1858 break;
1859 default:
1860 BUG();
1861 level = "Unknown\n";
1862 break;
1863 }
1864
1865 return simple_read_from_buffer(user_buf, count, ppos, level,
1866 strlen(level));
1867}
1868
1869static const struct file_operations dapm_bias_fops = {
234e3405 1870 .open = simple_open,
ef49e4fa
MB		 1871 .read = dapm_bias_read_file,
1872 .llseek = default_llseek,
1873};
1874
8eecaf62
LPC		 1875void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1876 struct dentry *parent)
79fb9387 1877{
79fb9387
MB		 1878 struct dentry *d;
1879
8eecaf62
LPC		 1880 dapm->debugfs_dapm = debugfs_create_dir("dapm", parent);
1881
1882 if (!dapm->debugfs_dapm) {
f1e90af2 1883 dev_warn(dapm->dev,
30a6a1a4 1884 "ASoC: Failed to create DAPM debugfs directory\n");
79fb9387 1885 return;
8eecaf62 1886 }
79fb9387 1887
ef49e4fa
MB		 1888 d = debugfs_create_file("bias_level", 0444,
1889 dapm->debugfs_dapm, dapm,
1890 &dapm_bias_fops);
1891 if (!d)
1892 dev_warn(dapm->dev,
1893 "ASoC: Failed to create bias level debugfs file\n");
d5d1e0be 1894}
ef49e4fa 1895
d5d1e0be
LPC		 1896static void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1897{
1898 struct snd_soc_dapm_context *dapm = w->dapm;
1899 struct dentry *d;
79fb9387 1900
d5d1e0be
LPC		 1901 if (!dapm->debugfs_dapm || !w->name)
1902 return;
1903
1904 d = debugfs_create_file(w->name, 0444,
1905 dapm->debugfs_dapm, w,
1906 &dapm_widget_power_fops);
1907 if (!d)
1908 dev_warn(w->dapm->dev,
1909 "ASoC: Failed to create %s debugfs file\n",
1910 w->name);
79fb9387 1911}
d5d1e0be 1912
6c45e126
LPC		 1913static void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1914{
1915 debugfs_remove_recursive(dapm->debugfs_dapm);
1916}
1917
79fb9387 1918#else
8eecaf62
LPC		 1919void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
1920 struct dentry *parent)
79fb9387
MB		 1921{
1922}
d5d1e0be
LPC		 1923
1924static inline void dapm_debugfs_add_widget(struct snd_soc_dapm_widget *w)
1925{
1926}
1927
6c45e126
LPC		 1928static inline void dapm_debugfs_cleanup(struct snd_soc_dapm_context *dapm)
1929{
1930}
1931
79fb9387
MB		 1932#endif
1933
2b97eabc 1934/* test and update the power status of a mux widget */
4edbb345 1935static int soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
40f02cd9 1936 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
2b97eabc
RP		 1937{
1938 struct snd_soc_dapm_path *path;
1939 int found = 0;
1940
eff317d0 1941 if (widget->id != snd_soc_dapm_mux &&
24ff33ac 1942 widget->id != snd_soc_dapm_virt_mux &&
eff317d0 1943 widget->id != snd_soc_dapm_value_mux)
2b97eabc
RP		 1944 return -ENODEV;
1945
2b97eabc 1946 /* find dapm widget path assoc with kcontrol */
8ddab3f5 1947 list_for_each_entry(path, &widget->dapm->card->paths, list) {
2b97eabc
RP		 1948 if (path->kcontrol != kcontrol)
1949 continue;
1950
cb01e2b9 1951 if (!path->name || !e->texts[mux])
2b97eabc
RP		 1952 continue;
1953
1954 found = 1;
1955 /* we now need to match the string in the enum to the path */
db432b41 1956 if (!(strcmp(path->name, e->texts[mux]))) {
2b97eabc 1957 path->connect = 1; /* new connection */
75c1f891 1958 dapm_mark_dirty(path->source, "mux connection");
db432b41
MB		 1959 } else {
1960 if (path->connect)
75c1f891
MB		 1961 dapm_mark_dirty(path->source,
1962 "mux disconnection");
2b97eabc 1963 path->connect = 0; /* old connection must be powered down */
db432b41 1964 }
2b97eabc
RP		 1965 }
1966
db432b41 1967 if (found) {
75c1f891 1968 dapm_mark_dirty(widget, "mux change");
ce6120cc 1969 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
db432b41 1970 }
2b97eabc 1971
618dae11 1972 return found;
2b97eabc 1973}
4edbb345
LG		 1974
1975int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1976 struct snd_kcontrol *kcontrol, int mux, struct soc_enum *e)
1977{
1978 struct snd_soc_card *card = widget->dapm->card;
1979 int ret;
1980
3cd04343 1981 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4edbb345
LG		 1982 ret = soc_dapm_mux_update_power(widget, kcontrol, mux, e);
1983 mutex_unlock(&card->dapm_mutex);
618dae11
LG		 1984 if (ret > 0)
1985 soc_dpcm_runtime_update(widget);
4edbb345
LG		 1986 return ret;
1987}
40f02cd9 1988EXPORT_SYMBOL_GPL(snd_soc_dapm_mux_update_power);
2b97eabc 1989
1b075e3f 1990/* test and update the power status of a mixer or switch widget */
4edbb345 1991static int soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
283375ce 1992 struct snd_kcontrol *kcontrol, int connect)
2b97eabc
RP		 1993{
1994 struct snd_soc_dapm_path *path;
1995 int found = 0;
1996
1b075e3f 1997 if (widget->id != snd_soc_dapm_mixer &&
ca9c1aae 1998 widget->id != snd_soc_dapm_mixer_named_ctl &&
1b075e3f 1999 widget->id != snd_soc_dapm_switch)
2b97eabc
RP		 2000 return -ENODEV;
2001
2b97eabc 2002 /* find dapm widget path assoc with kcontrol */
8ddab3f5 2003 list_for_each_entry(path, &widget->dapm->card->paths, list) {
2b97eabc
RP		 2004 if (path->kcontrol != kcontrol)
2005 continue;
2006
2007 /* found, now check type */
2008 found = 1;
283375ce 2009 path->connect = connect;
75c1f891 2010 dapm_mark_dirty(path->source, "mixer connection");
2b97eabc
RP		 2011 }
2012
db432b41 2013 if (found) {
75c1f891 2014 dapm_mark_dirty(widget, "mixer update");
ce6120cc 2015 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
db432b41 2016 }
2b97eabc 2017
618dae11 2018 return found;
2b97eabc 2019}
4edbb345
LG		 2020
2021int snd_soc_dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
2022 struct snd_kcontrol *kcontrol, int connect)
2023{
2024 struct snd_soc_card *card = widget->dapm->card;
2025 int ret;
2026
3cd04343 2027 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
4edbb345
LG		 2028 ret = soc_dapm_mixer_update_power(widget, kcontrol, connect);
2029 mutex_unlock(&card->dapm_mutex);
618dae11
LG		 2030 if (ret > 0)
2031 soc_dpcm_runtime_update(widget);
4edbb345
LG		 2032 return ret;
2033}
40f02cd9 2034EXPORT_SYMBOL_GPL(snd_soc_dapm_mixer_update_power);
2b97eabc
RP		 2035
2036/* show dapm widget status in sys fs */
2037static ssize_t dapm_widget_show(struct device *dev,
2038 struct device_attribute *attr, char *buf)
2039{
36ae1a96 2040 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
f0fba2ad 2041 struct snd_soc_codec *codec =rtd->codec;
2b97eabc
RP		 2042 struct snd_soc_dapm_widget *w;
2043 int count = 0;
2044 char *state = "not set";
2045
97c866de
JN		 2046 list_for_each_entry(w, &codec->card->widgets, list) {
2047 if (w->dapm != &codec->dapm)
2048 continue;
2b97eabc
RP		 2049
2050 /* only display widgets that burnm power */
2051 switch (w->id) {
2052 case snd_soc_dapm_hp:
2053 case snd_soc_dapm_mic:
2054 case snd_soc_dapm_spk:
2055 case snd_soc_dapm_line:
2056 case snd_soc_dapm_micbias:
2057 case snd_soc_dapm_dac:
2058 case snd_soc_dapm_adc:
2059 case snd_soc_dapm_pga:
d88429a6 2060 case snd_soc_dapm_out_drv:
2b97eabc 2061 case snd_soc_dapm_mixer:
ca9c1aae 2062 case snd_soc_dapm_mixer_named_ctl:
246d0a17 2063 case snd_soc_dapm_supply:
62ea874a 2064 case snd_soc_dapm_regulator_supply:
d7e7eb91 2065 case snd_soc_dapm_clock_supply:
2b97eabc
RP		 2066 if (w->name)
2067 count += sprintf(buf + count, "%s: %s\n",
2068 w->name, w->power ? "On":"Off");
2069 break;
2070 default:
2071 break;
2072 }
2073 }
2074
ce6120cc 2075 switch (codec->dapm.bias_level) {
0be9898a
MB		 2076 case SND_SOC_BIAS_ON:
2077 state = "On";
2b97eabc 2078 break;
0be9898a
MB		 2079 case SND_SOC_BIAS_PREPARE:
2080 state = "Prepare";
2b97eabc 2081 break;
0be9898a
MB		 2082 case SND_SOC_BIAS_STANDBY:
2083 state = "Standby";
2b97eabc 2084 break;
0be9898a
MB		 2085 case SND_SOC_BIAS_OFF:
2086 state = "Off";
2b97eabc
RP		 2087 break;
2088 }
2089 count += sprintf(buf + count, "PM State: %s\n", state);
2090
2091 return count;
2092}
2093
2094static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
2095
2096int snd_soc_dapm_sys_add(struct device *dev)
2097{
12ef193d 2098 return device_create_file(dev, &dev_attr_dapm_widget);
2b97eabc
RP		 2099}
2100
2101static void snd_soc_dapm_sys_remove(struct device *dev)
2102{
aef90843 2103 device_remove_file(dev, &dev_attr_dapm_widget);
2b97eabc
RP		 2104}
2105
2106/* free all dapm widgets and resources */
ce6120cc 2107static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
2b97eabc
RP		 2108{
2109 struct snd_soc_dapm_widget *w, *next_w;
2110 struct snd_soc_dapm_path *p, *next_p;
2111
97c866de
JN		 2112 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
2113 if (w->dapm != dapm)
2114 continue;
2b97eabc 2115 list_del(&w->list);
8ddab3f5
JN		 2116 /*
2117 * remove source and sink paths associated to this widget.
2118 * While removing the path, remove reference to it from both
2119 * source and sink widgets so that path is removed only once.
2120 */
2121 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
2122 list_del(&p->list_sink);
2123 list_del(&p->list_source);
2124 list_del(&p->list);
2125 kfree(p->long_name);
2126 kfree(p);
2127 }
2128 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
2129 list_del(&p->list_sink);
2130 list_del(&p->list_source);
2131 list_del(&p->list);
2132 kfree(p->long_name);
2133 kfree(p);
2134 }
fad59888 2135 kfree(w->kcontrols);
ead9b919 2136 kfree(w->name);
2b97eabc
RP		 2137 kfree(w);
2138 }
2b97eabc
RP		 2139}
2140
91a5fca4
LPC		 2141static struct snd_soc_dapm_widget *dapm_find_widget(
2142 struct snd_soc_dapm_context *dapm, const char *pin,
2143 bool search_other_contexts)
a5302181
LG		 2144{
2145 struct snd_soc_dapm_widget *w;
91a5fca4 2146 struct snd_soc_dapm_widget *fallback = NULL;
a5302181 2147
97c866de 2148 list_for_each_entry(w, &dapm->card->widgets, list) {
a5302181 2149 if (!strcmp(w->name, pin)) {
91a5fca4
LPC		 2150 if (w->dapm == dapm)
2151 return w;
2152 else
2153 fallback = w;
a5302181
LG		 2154 }
2155 }
2156
91a5fca4
LPC		 2157 if (search_other_contexts)
2158 return fallback;
2159
2160 return NULL;
2161}
2162
2163static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
2164 const char *pin, int status)
2165{
2166 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
2167
2168 if (!w) {
30a6a1a4 2169 dev_err(dapm->dev, "ASoC: DAPM unknown pin %s\n", pin);
91a5fca4 2170 return -EINVAL;
0d86733c
MB		 2171 }
2172
1a8b2d9d
MB		 2173 if (w->connected != status)
2174 dapm_mark_dirty(w, "pin configuration");
2175
91a5fca4
LPC		 2176 w->connected = status;
2177 if (status == 0)
2178 w->force = 0;
2179
2180 return 0;
a5302181
LG		 2181}
2182
2b97eabc 2183/**
a5302181 2184 * snd_soc_dapm_sync - scan and power dapm paths
ce6120cc 2185 * @dapm: DAPM context
2b97eabc
RP		 2186 *
2187 * Walks all dapm audio paths and powers widgets according to their
2188 * stream or path usage.
2189 *
2190 * Returns 0 for success.
2191 */
ce6120cc 2192int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
2b97eabc 2193{
a73fb2df
LG		 2194 int ret;
2195
4f4c0072
MB		 2196 /*
2197 * Suppress early reports (eg, jacks syncing their state) to avoid
2198 * silly DAPM runs during card startup.
2199 */
2200 if (!dapm->card || !dapm->card->instantiated)
2201 return 0;
2202
3cd04343 2203 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
a73fb2df
LG		 2204 ret = dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
2205 mutex_unlock(&dapm->card->dapm_mutex);
2206 return ret;
2b97eabc 2207}
a5302181 2208EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
2b97eabc 2209
ce6120cc 2210static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
215edda3 2211 const struct snd_soc_dapm_route *route)
2b97eabc
RP		 2212{
2213 struct snd_soc_dapm_path *path;
2214 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
97c866de 2215 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
ead9b919 2216 const char *sink;
215edda3 2217 const char *control = route->control;
ead9b919
JN		 2218 const char *source;
2219 char prefixed_sink[80];
2220 char prefixed_source[80];
2b97eabc
RP		 2221 int ret = 0;
2222
88e8b9a8 2223 if (dapm->codec && dapm->codec->name_prefix) {
ead9b919
JN		 2224 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2225 dapm->codec->name_prefix, route->sink);
2226 sink = prefixed_sink;
2227 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2228 dapm->codec->name_prefix, route->source);
2229 source = prefixed_source;
2230 } else {
2231 sink = route->sink;
2232 source = route->source;
2233 }
2234
97c866de
JN		 2235 /*
2236 * find src and dest widgets over all widgets but favor a widget from
2237 * current DAPM context
2238 */
2239 list_for_each_entry(w, &dapm->card->widgets, list) {
2b97eabc 2240 if (!wsink && !(strcmp(w->name, sink))) {
97c866de
JN		 2241 wtsink = w;
2242 if (w->dapm == dapm)
2243 wsink = w;
2b97eabc
RP		 2244 continue;
2245 }
2246 if (!wsource && !(strcmp(w->name, source))) {
97c866de
JN		 2247 wtsource = w;
2248 if (w->dapm == dapm)
2249 wsource = w;
2b97eabc
RP		 2250 }
2251 }
97c866de
JN		 2252 /* use widget from another DAPM context if not found from this */
2253 if (!wsink)
2254 wsink = wtsink;
2255 if (!wsource)
2256 wsource = wtsource;
2b97eabc 2257
30a6a1a4
LG		 2258 if (wsource == NULL) {
2259 dev_err(dapm->dev, "ASoC: no source widget found for %s\n",
2260 route->source);
2b97eabc 2261 return -ENODEV;
30a6a1a4
LG		 2262 }
2263 if (wsink == NULL) {
2264 dev_err(dapm->dev, "ASoC: no sink widget found for %s\n",
2265 route->sink);
2266 return -ENODEV;
2267 }
2b97eabc
RP		 2268
2269 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
2270 if (!path)
2271 return -ENOMEM;
2272
2273 path->source = wsource;
2274 path->sink = wsink;
215edda3 2275 path->connected = route->connected;
2b97eabc
RP		 2276 INIT_LIST_HEAD(&path->list);
2277 INIT_LIST_HEAD(&path->list_source);
2278 INIT_LIST_HEAD(&path->list_sink);
2279
2280 /* check for external widgets */
2281 if (wsink->id == snd_soc_dapm_input) {
2282 if (wsource->id == snd_soc_dapm_micbias ||
2283 wsource->id == snd_soc_dapm_mic ||
087d53ab
RC		 2284 wsource->id == snd_soc_dapm_line ||
2285 wsource->id == snd_soc_dapm_output)
2b97eabc
RP		 2286 wsink->ext = 1;
2287 }
2288 if (wsource->id == snd_soc_dapm_output) {
2289 if (wsink->id == snd_soc_dapm_spk ||
2290 wsink->id == snd_soc_dapm_hp ||
1e39221e
SF		 2291 wsink->id == snd_soc_dapm_line ||
2292 wsink->id == snd_soc_dapm_input)
2b97eabc
RP		 2293 wsource->ext = 1;
2294 }
2295
2296 /* connect static paths */
2297 if (control == NULL) {
8ddab3f5 2298 list_add(&path->list, &dapm->card->paths);
2b97eabc
RP		 2299 list_add(&path->list_sink, &wsink->sources);
2300 list_add(&path->list_source, &wsource->sinks);
2301 path->connect = 1;
2302 return 0;
2303 }
2304
2305 /* connect dynamic paths */
dc2bea61 2306 switch (wsink->id) {
2b97eabc
RP		 2307 case snd_soc_dapm_adc:
2308 case snd_soc_dapm_dac:
2309 case snd_soc_dapm_pga:
d88429a6 2310 case snd_soc_dapm_out_drv:
2b97eabc
RP		 2311 case snd_soc_dapm_input:
2312 case snd_soc_dapm_output:
1ab97c8c 2313 case snd_soc_dapm_siggen:
2b97eabc
RP		 2314 case snd_soc_dapm_micbias:
2315 case snd_soc_dapm_vmid:
2316 case snd_soc_dapm_pre:
2317 case snd_soc_dapm_post:
246d0a17 2318 case snd_soc_dapm_supply:
62ea874a 2319 case snd_soc_dapm_regulator_supply:
d7e7eb91 2320 case snd_soc_dapm_clock_supply:
010ff262
MB		 2321 case snd_soc_dapm_aif_in:
2322 case snd_soc_dapm_aif_out:
888df395 2323 case snd_soc_dapm_dai:
c74184ed 2324 case snd_soc_dapm_dai_link:
8ddab3f5 2325 list_add(&path->list, &dapm->card->paths);
2b97eabc
RP		 2326 list_add(&path->list_sink, &wsink->sources);
2327 list_add(&path->list_source, &wsource->sinks);
2328 path->connect = 1;
2329 return 0;
2330 case snd_soc_dapm_mux:
24ff33ac 2331 case snd_soc_dapm_virt_mux:
74155556 2332 case snd_soc_dapm_value_mux:
ce6120cc 2333 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
82cfecdc 2334 &wsink->kcontrol_news[0]);
2b97eabc
RP		 2335 if (ret != 0)
2336 goto err;
2337 break;
2338 case snd_soc_dapm_switch:
2339 case snd_soc_dapm_mixer:
ca9c1aae 2340 case snd_soc_dapm_mixer_named_ctl:
ce6120cc 2341 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
2b97eabc
RP		 2342 if (ret != 0)
2343 goto err;
2344 break;
2345 case snd_soc_dapm_hp:
2346 case snd_soc_dapm_mic:
2347 case snd_soc_dapm_line:
2348 case snd_soc_dapm_spk:
8ddab3f5 2349 list_add(&path->list, &dapm->card->paths);
2b97eabc
RP		 2350 list_add(&path->list_sink, &wsink->sources);
2351 list_add(&path->list_source, &wsource->sinks);
2352 path->connect = 0;
2353 return 0;
2354 }
fabd0384
MB		 2355
2356 dapm_mark_dirty(wsource, "Route added");
2357 dapm_mark_dirty(wsink, "Route added");
2358
2b97eabc
RP		 2359 return 0;
2360
2361err:
30a6a1a4 2362 dev_warn(dapm->dev, "ASoC: no dapm match for %s --> %s --> %s\n",
f7d41ae8 2363 source, control, sink);
2b97eabc
RP		 2364 kfree(path);
2365 return ret;
2366}
105f1c28 2367
efcc3c61
MB		 2368static int snd_soc_dapm_del_route(struct snd_soc_dapm_context *dapm,
2369 const struct snd_soc_dapm_route *route)
2370{
2371 struct snd_soc_dapm_path *path, *p;
2372 const char *sink;
2373 const char *source;
2374 char prefixed_sink[80];
2375 char prefixed_source[80];
2376
2377 if (route->control) {
2378 dev_err(dapm->dev,
30a6a1a4 2379 "ASoC: Removal of routes with controls not supported\n");
efcc3c61
MB		 2380 return -EINVAL;
2381 }
2382
2383 if (dapm->codec && dapm->codec->name_prefix) {
2384 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
2385 dapm->codec->name_prefix, route->sink);
2386 sink = prefixed_sink;
2387 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
2388 dapm->codec->name_prefix, route->source);
2389 source = prefixed_source;
2390 } else {
2391 sink = route->sink;
2392 source = route->source;
2393 }
2394
2395 path = NULL;
2396 list_for_each_entry(p, &dapm->card->paths, list) {
2397 if (strcmp(p->source->name, source) != 0)
2398 continue;
2399 if (strcmp(p->sink->name, sink) != 0)
2400 continue;
2401 path = p;
2402 break;
2403 }
2404
2405 if (path) {
2406 dapm_mark_dirty(path->source, "Route removed");
2407 dapm_mark_dirty(path->sink, "Route removed");
2408
2409 list_del(&path->list);
2410 list_del(&path->list_sink);
2411 list_del(&path->list_source);
2412 kfree(path);
2413 } else {
30a6a1a4 2414 dev_warn(dapm->dev, "ASoC: Route %s->%s does not exist\n",
efcc3c61
MB		 2415 source, sink);
2416 }
2417
2418 return 0;
2419}
2420
105f1c28
MB		 2421/**
2422 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
ce6120cc 2423 * @dapm: DAPM context
105f1c28
MB		 2424 * @route: audio routes
2425 * @num: number of routes
2426 *
2427 * Connects 2 dapm widgets together via a named audio path. The sink is
2428 * the widget receiving the audio signal, whilst the source is the sender
2429 * of the audio signal.
2430 *
2431 * Returns 0 for success else error. On error all resources can be freed
2432 * with a call to snd_soc_card_free().
2433 */
ce6120cc 2434int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
105f1c28
MB		 2435 const struct snd_soc_dapm_route *route, int num)
2436{
62d4a4b9 2437 int i, r, ret = 0;
105f1c28 2438
a73fb2df 2439 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
105f1c28 2440 for (i = 0; i < num; i++) {
62d4a4b9
MB		 2441 r = snd_soc_dapm_add_route(dapm, route);
2442 if (r < 0) {
30a6a1a4
LG		 2443 dev_err(dapm->dev, "ASoC: Failed to add route %s -> %s -> %s\n",
2444 route->source,
2445 route->control ? route->control : "direct",
2446 route->sink);
62d4a4b9 2447 ret = r;
105f1c28
MB		 2448 }
2449 route++;
2450 }
a73fb2df 2451 mutex_unlock(&dapm->card->dapm_mutex);
105f1c28 2452
60884c27 2453 return ret;
105f1c28
MB		 2454}
2455EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
2456
efcc3c61
MB		 2457/**
2458 * snd_soc_dapm_del_routes - Remove routes between DAPM widgets
2459 * @dapm: DAPM context
2460 * @route: audio routes
2461 * @num: number of routes
2462 *
2463 * Removes routes from the DAPM context.
2464 */
2465int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
2466 const struct snd_soc_dapm_route *route, int num)
2467{
2468 int i, ret = 0;
2469
2470 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2471 for (i = 0; i < num; i++) {
2472 snd_soc_dapm_del_route(dapm, route);
2473 route++;
2474 }
2475 mutex_unlock(&dapm->card->dapm_mutex);
2476
2477 return ret;
2478}
2479EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);
2480
bf3a9e13
MB		 2481static int snd_soc_dapm_weak_route(struct snd_soc_dapm_context *dapm,
2482 const struct snd_soc_dapm_route *route)
2483{
2484 struct snd_soc_dapm_widget *source = dapm_find_widget(dapm,
2485 route->source,
2486 true);
2487 struct snd_soc_dapm_widget *sink = dapm_find_widget(dapm,
2488 route->sink,
2489 true);
2490 struct snd_soc_dapm_path *path;
2491 int count = 0;
2492
2493 if (!source) {
30a6a1a4 2494 dev_err(dapm->dev, "ASoC: Unable to find source %s for weak route\n",
bf3a9e13
MB		 2495 route->source);
2496 return -ENODEV;
2497 }
2498
2499 if (!sink) {
30a6a1a4 2500 dev_err(dapm->dev, "ASoC: Unable to find sink %s for weak route\n",
bf3a9e13
MB		 2501 route->sink);
2502 return -ENODEV;
2503 }
2504
2505 if (route->control || route->connected)
30a6a1a4 2506 dev_warn(dapm->dev, "ASoC: Ignoring control for weak route %s->%s\n",
bf3a9e13
MB		 2507 route->source, route->sink);
2508
2509 list_for_each_entry(path, &source->sinks, list_source) {
2510 if (path->sink == sink) {
2511 path->weak = 1;
2512 count++;
2513 }
2514 }
2515
2516 if (count == 0)
30a6a1a4 2517 dev_err(dapm->dev, "ASoC: No path found for weak route %s->%s\n",
bf3a9e13
MB		 2518 route->source, route->sink);
2519 if (count > 1)
30a6a1a4 2520 dev_warn(dapm->dev, "ASoC: %d paths found for weak route %s->%s\n",
bf3a9e13
MB		 2521 count, route->source, route->sink);
2522
2523 return 0;
2524}
2525
2526/**
2527 * snd_soc_dapm_weak_routes - Mark routes between DAPM widgets as weak
2528 * @dapm: DAPM context
2529 * @route: audio routes
2530 * @num: number of routes
2531 *
2532 * Mark existing routes matching those specified in the passed array
2533 * as being weak, meaning that they are ignored for the purpose of
2534 * power decisions. The main intended use case is for sidetone paths
2535 * which couple audio between other independent paths if they are both
2536 * active in order to make the combination work better at the user
2537 * level but which aren't intended to be "used".
2538 *
2539 * Note that CODEC drivers should not use this as sidetone type paths
2540 * can frequently also be used as bypass paths.
2541 */
2542int snd_soc_dapm_weak_routes(struct snd_soc_dapm_context *dapm,
2543 const struct snd_soc_dapm_route *route, int num)
2544{
2545 int i, err;
2546 int ret = 0;
2547
a73fb2df 2548 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
bf3a9e13
MB		 2549 for (i = 0; i < num; i++) {
2550 err = snd_soc_dapm_weak_route(dapm, route);
2551 if (err)
2552 ret = err;
2553 route++;
2554 }
a73fb2df 2555 mutex_unlock(&dapm->card->dapm_mutex);
bf3a9e13
MB		 2556
2557 return ret;
2558}
2559EXPORT_SYMBOL_GPL(snd_soc_dapm_weak_routes);
2560
2b97eabc
RP		 2561/**
2562 * snd_soc_dapm_new_widgets - add new dapm widgets
ce6120cc 2563 * @dapm: DAPM context
2b97eabc
RP		 2564 *
2565 * Checks the codec for any new dapm widgets and creates them if found.
2566 *
2567 * Returns 0 for success.
2568 */
ce6120cc 2569int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
2b97eabc
RP		 2570{
2571 struct snd_soc_dapm_widget *w;
b66a70d5 2572 unsigned int val;
2b97eabc 2573
a73fb2df
LG		 2574 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
2575
97c866de 2576 list_for_each_entry(w, &dapm->card->widgets, list)
2b97eabc
RP		 2577 {
2578 if (w->new)
2579 continue;
2580
fad59888
SW		 2581 if (w->num_kcontrols) {
2582 w->kcontrols = kzalloc(w->num_kcontrols *
2583 sizeof(struct snd_kcontrol *),
2584 GFP_KERNEL);
a73fb2df
LG		 2585 if (!w->kcontrols) {
2586 mutex_unlock(&dapm->card->dapm_mutex);
fad59888 2587 return -ENOMEM;
a73fb2df 2588 }
fad59888
SW		 2589 }
2590
2b97eabc
RP		 2591 switch(w->id) {
2592 case snd_soc_dapm_switch:
2593 case snd_soc_dapm_mixer:
ca9c1aae 2594 case snd_soc_dapm_mixer_named_ctl:
4b80b8c2 2595 dapm_new_mixer(w);
2b97eabc
RP		 2596 break;
2597 case snd_soc_dapm_mux:
24ff33ac 2598 case snd_soc_dapm_virt_mux:
2e72f8e3 2599 case snd_soc_dapm_value_mux:
4b80b8c2 2600 dapm_new_mux(w);
2b97eabc 2601 break;
2b97eabc 2602 case snd_soc_dapm_pga:
d88429a6 2603 case snd_soc_dapm_out_drv:
4b80b8c2 2604 dapm_new_pga(w);
2b97eabc 2605 break;
7ca3a18b 2606 default:
2b97eabc
RP		 2607 break;
2608 }
b66a70d5
MB		 2609
2610 /* Read the initial power state from the device */
2611 if (w->reg >= 0) {
0445bdf4 2612 val = soc_widget_read(w, w->reg);
b66a70d5
MB		 2613 val &= 1 << w->shift;
2614 if (w->invert)
2615 val = !val;
2616
2617 if (val)
2618 w->power = 1;
2619 }
2620
2b97eabc 2621 w->new = 1;
d5d1e0be 2622
7508b12a 2623 dapm_mark_dirty(w, "new widget");
d5d1e0be 2624 dapm_debugfs_add_widget(w);
2b97eabc
RP		 2625 }
2626
ce6120cc 2627 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
a73fb2df 2628 mutex_unlock(&dapm->card->dapm_mutex);
2b97eabc
RP		 2629 return 0;
2630}
2631EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
2632
2633/**
2634 * snd_soc_dapm_get_volsw - dapm mixer get callback
2635 * @kcontrol: mixer control
ac11a2b3 2636 * @ucontrol: control element information
2b97eabc
RP		 2637 *
2638 * Callback to get the value of a dapm mixer control.
2639 *
2640 * Returns 0 for success.
2641 */
2642int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
2643 struct snd_ctl_elem_value *ucontrol)
2644{
fafd2176
SW		 2645 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2646 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
4eaa9819
JS		 2647 struct soc_mixer_control *mc =
2648 (struct soc_mixer_control *)kcontrol->private_value;
815ecf8d
JS		 2649 unsigned int reg = mc->reg;
2650 unsigned int shift = mc->shift;
4eaa9819 2651 int max = mc->max;
815ecf8d 2652 unsigned int mask = (1 << fls(max)) - 1;
da602ab8
BT		 2653 unsigned int invert = mc->invert;
2654
2655 if (snd_soc_volsw_is_stereo(mc))
2656 dev_warn(widget->dapm->dev,
30a6a1a4 2657 "ASoC: Control '%s' is stereo, which is not supported\n",
da602ab8 2658 kcontrol->id.name);
2b97eabc 2659
2b97eabc
RP		 2660 ucontrol->value.integer.value[0] =
2661 (snd_soc_read(widget->codec, reg) >> shift) & mask;
da602ab8 2662 if (invert)
2b97eabc 2663 ucontrol->value.integer.value[0] =
a7a4ac86 2664 max - ucontrol->value.integer.value[0];
2b97eabc
RP		 2665
2666 return 0;
2667}
2668EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
2669
2670/**
2671 * snd_soc_dapm_put_volsw - dapm mixer set callback
2672 * @kcontrol: mixer control
ac11a2b3 2673 * @ucontrol: control element information
2b97eabc
RP		 2674 *
2675 * Callback to set the value of a dapm mixer control.
2676 *
2677 * Returns 0 for success.
2678 */
2679int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
2680 struct snd_ctl_elem_value *ucontrol)
2681{
fafd2176
SW		 2682 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2683 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2684 struct snd_soc_codec *codec = widget->codec;
a73fb2df 2685 struct snd_soc_card *card = codec->card;
4eaa9819
JS		 2686 struct soc_mixer_control *mc =
2687 (struct soc_mixer_control *)kcontrol->private_value;
815ecf8d
JS		 2688 unsigned int reg = mc->reg;
2689 unsigned int shift = mc->shift;
4eaa9819 2690 int max = mc->max;
815ecf8d
JS		 2691 unsigned int mask = (1 << fls(max)) - 1;
2692 unsigned int invert = mc->invert;
e9cf7049 2693 unsigned int val;
97404f2e
MB		 2694 int connect, change;
2695 struct snd_soc_dapm_update update;
fafd2176 2696 int wi;
2b97eabc 2697
da602ab8
BT		 2698 if (snd_soc_volsw_is_stereo(mc))
2699 dev_warn(widget->dapm->dev,
30a6a1a4 2700 "ASoC: Control '%s' is stereo, which is not supported\n",
da602ab8
BT		 2701 kcontrol->id.name);
2702
2b97eabc 2703 val = (ucontrol->value.integer.value[0] & mask);
8a720718 2704 connect = !!val;
2b97eabc
RP		 2705
2706 if (invert)
a7a4ac86 2707 val = max - val;
e9cf7049 2708 mask = mask << shift;
2b97eabc 2709 val = val << shift;
2b97eabc 2710
3cd04343 2711 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
2b97eabc 2712
e9cf7049 2713 change = snd_soc_test_bits(widget->codec, reg, mask, val);
97404f2e 2714 if (change) {
fafd2176
SW		 2715 for (wi = 0; wi < wlist->num_widgets; wi++) {
2716 widget = wlist->widgets[wi];
283375ce 2717
fafd2176 2718 widget->value = val;
97404f2e 2719
fafd2176
SW		 2720 update.kcontrol = kcontrol;
2721 update.widget = widget;
2722 update.reg = reg;
2723 update.mask = mask;
2724 update.val = val;
2725 widget->dapm->update = &update;
97404f2e 2726
4edbb345 2727 soc_dapm_mixer_update_power(widget, kcontrol, connect);
fafd2176
SW		 2728
2729 widget->dapm->update = NULL;
2730 }
283375ce
MB		 2731 }
2732
a73fb2df 2733 mutex_unlock(&card->dapm_mutex);
97404f2e 2734 return 0;
2b97eabc
RP		 2735}
2736EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
2737
2738/**
2739 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
2740 * @kcontrol: mixer control
ac11a2b3 2741 * @ucontrol: control element information
2b97eabc
RP		 2742 *
2743 * Callback to get the value of a dapm enumerated double mixer control.
2744 *
2745 * Returns 0 for success.
2746 */
2747int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
2748 struct snd_ctl_elem_value *ucontrol)
2749{
fafd2176
SW		 2750 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2751 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2b97eabc 2752 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
86767b7d 2753 unsigned int val;
2b97eabc 2754
2b97eabc 2755 val = snd_soc_read(widget->codec, e->reg);
86767b7d 2756 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & e->mask;
2b97eabc
RP		 2757 if (e->shift_l != e->shift_r)
2758 ucontrol->value.enumerated.item[1] =
86767b7d 2759 (val >> e->shift_r) & e->mask;
2b97eabc
RP		 2760
2761 return 0;
2762}
2763EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
2764
2765/**
2766 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
2767 * @kcontrol: mixer control
ac11a2b3 2768 * @ucontrol: control element information
2b97eabc
RP		 2769 *
2770 * Callback to set the value of a dapm enumerated double mixer control.
2771 *
2772 * Returns 0 for success.
2773 */
2774int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
2775 struct snd_ctl_elem_value *ucontrol)
2776{
fafd2176
SW		 2777 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2778 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2779 struct snd_soc_codec *codec = widget->codec;
a73fb2df 2780 struct snd_soc_card *card = codec->card;
2b97eabc 2781 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3a65577d 2782 unsigned int val, mux, change;
86767b7d 2783 unsigned int mask;
97404f2e 2784 struct snd_soc_dapm_update update;
fafd2176 2785 int wi;
2b97eabc 2786
f8ba0b7b 2787 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2b97eabc
RP		 2788 return -EINVAL;
2789 mux = ucontrol->value.enumerated.item[0];
2790 val = mux << e->shift_l;
86767b7d 2791 mask = e->mask << e->shift_l;
2b97eabc 2792 if (e->shift_l != e->shift_r) {
f8ba0b7b 2793 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2b97eabc
RP		 2794 return -EINVAL;
2795 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
86767b7d 2796 mask |= e->mask << e->shift_r;
2b97eabc
RP		 2797 }
2798
3cd04343 2799 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
fafd2176 2800
3a65577d 2801 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
fafd2176
SW		 2802 if (change) {
2803 for (wi = 0; wi < wlist->num_widgets; wi++) {
2804 widget = wlist->widgets[wi];
2805
2806 widget->value = val;
1642e3d4 2807
fafd2176
SW		 2808 update.kcontrol = kcontrol;
2809 update.widget = widget;
2810 update.reg = e->reg;
2811 update.mask = mask;
2812 update.val = val;
2813 widget->dapm->update = &update;
1642e3d4 2814
4edbb345 2815 soc_dapm_mux_update_power(widget, kcontrol, mux, e);
1642e3d4 2816
fafd2176
SW		 2817 widget->dapm->update = NULL;
2818 }
2819 }
2b97eabc 2820
a73fb2df 2821 mutex_unlock(&card->dapm_mutex);
97404f2e 2822 return change;
2b97eabc
RP		 2823}
2824EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
2825
d2b247a8
MB		 2826/**
2827 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
2828 * @kcontrol: mixer control
2829 * @ucontrol: control element information
2830 *
2831 * Returns 0 for success.
2832 */
2833int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
2834 struct snd_ctl_elem_value *ucontrol)
2835{
fafd2176
SW		 2836 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2837 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
d2b247a8
MB		 2838
2839 ucontrol->value.enumerated.item[0] = widget->value;
2840
2841 return 0;
2842}
2843EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
2844
2845/**
2846 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
2847 * @kcontrol: mixer control
2848 * @ucontrol: control element information
2849 *
2850 * Returns 0 for success.
2851 */
2852int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
2853 struct snd_ctl_elem_value *ucontrol)
2854{
fafd2176
SW		 2855 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2856 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2857 struct snd_soc_codec *codec = widget->codec;
a73fb2df 2858 struct snd_soc_card *card = codec->card;
d2b247a8
MB		 2859 struct soc_enum *e =
2860 (struct soc_enum *)kcontrol->private_value;
2861 int change;
2862 int ret = 0;
fafd2176 2863 int wi;
d2b247a8
MB		 2864
2865 if (ucontrol->value.enumerated.item[0] >= e->max)
2866 return -EINVAL;
2867
3cd04343 2868 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
d2b247a8
MB		 2869
2870 change = widget->value != ucontrol->value.enumerated.item[0];
fafd2176
SW		 2871 if (change) {
2872 for (wi = 0; wi < wlist->num_widgets; wi++) {
2873 widget = wlist->widgets[wi];
2874
2875 widget->value = ucontrol->value.enumerated.item[0];
2876
4edbb345 2877 soc_dapm_mux_update_power(widget, kcontrol, widget->value, e);
fafd2176
SW		 2878 }
2879 }
d2b247a8 2880
a73fb2df 2881 mutex_unlock(&card->dapm_mutex);
d2b247a8
MB		 2882 return ret;
2883}
2884EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
2885
2e72f8e3
PU		 2886/**
2887 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
2888 * callback
2889 * @kcontrol: mixer control
2890 * @ucontrol: control element information
2891 *
2892 * Callback to get the value of a dapm semi enumerated double mixer control.
2893 *
2894 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2895 * used for handling bitfield coded enumeration for example.
2896 *
2897 * Returns 0 for success.
2898 */
2899int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
2900 struct snd_ctl_elem_value *ucontrol)
2901{
fafd2176
SW		 2902 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2903 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
74155556 2904 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
46f5822f 2905 unsigned int reg_val, val, mux;
2e72f8e3
PU		 2906
2907 reg_val = snd_soc_read(widget->codec, e->reg);
2908 val = (reg_val >> e->shift_l) & e->mask;
2909 for (mux = 0; mux < e->max; mux++) {
2910 if (val == e->values[mux])
2911 break;
2912 }
2913 ucontrol->value.enumerated.item[0] = mux;
2914 if (e->shift_l != e->shift_r) {
2915 val = (reg_val >> e->shift_r) & e->mask;
2916 for (mux = 0; mux < e->max; mux++) {
2917 if (val == e->values[mux])
2918 break;
2919 }
2920 ucontrol->value.enumerated.item[1] = mux;
2921 }
2922
2923 return 0;
2924}
2925EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
2926
2927/**
2928 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
2929 * callback
2930 * @kcontrol: mixer control
2931 * @ucontrol: control element information
2932 *
2933 * Callback to set the value of a dapm semi enumerated double mixer control.
2934 *
2935 * Semi enumerated mixer: the enumerated items are referred as values. Can be
2936 * used for handling bitfield coded enumeration for example.
2937 *
2938 * Returns 0 for success.
2939 */
2940int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
2941 struct snd_ctl_elem_value *ucontrol)
2942{
fafd2176
SW		 2943 struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
2944 struct snd_soc_dapm_widget *widget = wlist->widgets[0];
2945 struct snd_soc_codec *codec = widget->codec;
a73fb2df 2946 struct snd_soc_card *card = codec->card;
74155556 2947 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
3a65577d 2948 unsigned int val, mux, change;
46f5822f 2949 unsigned int mask;
97404f2e 2950 struct snd_soc_dapm_update update;
fafd2176 2951 int wi;
2e72f8e3
PU		 2952
2953 if (ucontrol->value.enumerated.item[0] > e->max - 1)
2954 return -EINVAL;
2955 mux = ucontrol->value.enumerated.item[0];
2956 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
2957 mask = e->mask << e->shift_l;
2958 if (e->shift_l != e->shift_r) {
2959 if (ucontrol->value.enumerated.item[1] > e->max - 1)
2960 return -EINVAL;
2961 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
2962 mask |= e->mask << e->shift_r;
2963 }
2964
3cd04343 2965 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
fafd2176 2966
3a65577d 2967 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
fafd2176
SW		 2968 if (change) {
2969 for (wi = 0; wi < wlist->num_widgets; wi++) {
2970 widget = wlist->widgets[wi];
1642e3d4 2971
fafd2176 2972 widget->value = val;
1642e3d4 2973
fafd2176
SW		 2974 update.kcontrol = kcontrol;
2975 update.widget = widget;
2976 update.reg = e->reg;
2977 update.mask = mask;
2978 update.val = val;
2979 widget->dapm->update = &update;
1642e3d4 2980
4edbb345 2981 soc_dapm_mux_update_power(widget, kcontrol, mux, e);
fafd2176
SW		 2982
2983 widget->dapm->update = NULL;
2984 }
2985 }
2e72f8e3 2986
a73fb2df 2987 mutex_unlock(&card->dapm_mutex);
97404f2e 2988 return change;
2e72f8e3
PU		 2989}
2990EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2991
8b37dbd2
MB		 2992/**
2993 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2994 *
2995 * @kcontrol: mixer control
2996 * @uinfo: control element information
2997 *
2998 * Callback to provide information about a pin switch control.
2999 */
3000int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
3001 struct snd_ctl_elem_info *uinfo)
3002{
3003 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
3004 uinfo->count = 1;
3005 uinfo->value.integer.min = 0;
3006 uinfo->value.integer.max = 1;
3007
3008 return 0;
3009}
3010EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
3011
3012/**
3013 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
3014 *
3015 * @kcontrol: mixer control
3016 * @ucontrol: Value
3017 */
3018int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
3019 struct snd_ctl_elem_value *ucontrol)
3020{
48a8c394 3021 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
8b37dbd2
MB		 3022 const char *pin = (const char *)kcontrol->private_value;
3023
3cd04343 3024 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
8b37dbd2
MB		 3025
3026 ucontrol->value.integer.value[0] =
48a8c394 3027 snd_soc_dapm_get_pin_status(&card->dapm, pin);
8b37dbd2 3028
a73fb2df 3029 mutex_unlock(&card->dapm_mutex);
8b37dbd2
MB		 3030
3031 return 0;
3032}
3033EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
3034
3035/**
3036 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
3037 *
3038 * @kcontrol: mixer control
3039 * @ucontrol: Value
3040 */
3041int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
3042 struct snd_ctl_elem_value *ucontrol)
3043{
48a8c394 3044 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
8b37dbd2
MB		 3045 const char *pin = (const char *)kcontrol->private_value;
3046
3cd04343 3047 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
8b37dbd2
MB		 3048
3049 if (ucontrol->value.integer.value[0])
48a8c394 3050 snd_soc_dapm_enable_pin(&card->dapm, pin);
8b37dbd2 3051 else
48a8c394 3052 snd_soc_dapm_disable_pin(&card->dapm, pin);
8b37dbd2 3053
a73fb2df 3054 mutex_unlock(&card->dapm_mutex);
8b37dbd2 3055
a73fb2df 3056 snd_soc_dapm_sync(&card->dapm);
8b37dbd2
MB		 3057 return 0;
3058}
3059EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
3060
5ba06fc9
MB		 3061static struct snd_soc_dapm_widget *
3062snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
3063 const struct snd_soc_dapm_widget *widget)
2b97eabc
RP		 3064{
3065 struct snd_soc_dapm_widget *w;
ead9b919 3066 size_t name_len;
62ea874a 3067 int ret;
2b97eabc
RP		 3068
3069 if ((w = dapm_cnew_widget(widget)) == NULL)
5ba06fc9 3070 return NULL;
2b97eabc 3071
62ea874a
MB		 3072 switch (w->id) {
3073 case snd_soc_dapm_regulator_supply:
a3cc056b
LG		 3074 w->regulator = devm_regulator_get(dapm->dev, w->name);
3075 if (IS_ERR(w->regulator)) {
3076 ret = PTR_ERR(w->regulator);
30a6a1a4 3077 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
62ea874a 3078 w->name, ret);
5ba06fc9 3079 return NULL;
62ea874a 3080 }
8784c77a
MB		 3081
3082 if (w->invert & SND_SOC_DAPM_REGULATOR_BYPASS) {
3083 ret = regulator_allow_bypass(w->regulator, true);
3084 if (ret != 0)
3085 dev_warn(w->dapm->dev,
3086 "ASoC: Failed to unbypass %s: %d\n",
3087 w->name, ret);
3088 }
62ea874a 3089 break;
d7e7eb91 3090 case snd_soc_dapm_clock_supply:
165961ef 3091#ifdef CONFIG_CLKDEV_LOOKUP
695594f1 3092 w->clk = devm_clk_get(dapm->dev, w->name);
d7e7eb91
OL		 3093 if (IS_ERR(w->clk)) {
3094 ret = PTR_ERR(w->clk);
30a6a1a4 3095 dev_err(dapm->dev, "ASoC: Failed to request %s: %d\n",
d7e7eb91
OL		 3096 w->name, ret);
3097 return NULL;
3098 }
ec02995a
MB		 3099#else
3100 return NULL;
3101#endif
d7e7eb91 3102 break;
62ea874a
MB		 3103 default:
3104 break;
3105 }
2b97eabc 3106
ead9b919 3107 name_len = strlen(widget->name) + 1;
88e8b9a8 3108 if (dapm->codec && dapm->codec->name_prefix)
ead9b919
JN		 3109 name_len += 1 + strlen(dapm->codec->name_prefix);
3110 w->name = kmalloc(name_len, GFP_KERNEL);
3111 if (w->name == NULL) {
3112 kfree(w);
5ba06fc9 3113 return NULL;
ead9b919 3114 }
88e8b9a8 3115 if (dapm->codec && dapm->codec->name_prefix)
888df395 3116 snprintf((char *)w->name, name_len, "%s %s",
ead9b919
JN		 3117 dapm->codec->name_prefix, widget->name);
3118 else
888df395 3119 snprintf((char *)w->name, name_len, "%s", widget->name);
ead9b919 3120
7ca3a18b
MB		 3121 switch (w->id) {
3122 case snd_soc_dapm_switch:
3123 case snd_soc_dapm_mixer:
3124 case snd_soc_dapm_mixer_named_ctl:
3125 w->power_check = dapm_generic_check_power;
3126 break;
3127 case snd_soc_dapm_mux:
3128 case snd_soc_dapm_virt_mux:
3129 case snd_soc_dapm_value_mux:
3130 w->power_check = dapm_generic_check_power;
3131 break;
3132 case snd_soc_dapm_adc:
3133 case snd_soc_dapm_aif_out:
3134 w->power_check = dapm_adc_check_power;
3135 break;
3136 case snd_soc_dapm_dac:
3137 case snd_soc_dapm_aif_in:
3138 w->power_check = dapm_dac_check_power;
3139 break;
3140 case snd_soc_dapm_pga:
3141 case snd_soc_dapm_out_drv:
3142 case snd_soc_dapm_input:
3143 case snd_soc_dapm_output:
3144 case snd_soc_dapm_micbias:
3145 case snd_soc_dapm_spk:
3146 case snd_soc_dapm_hp:
3147 case snd_soc_dapm_mic:
3148 case snd_soc_dapm_line:
c74184ed 3149 case snd_soc_dapm_dai_link:
7ca3a18b
MB		 3150 w->power_check = dapm_generic_check_power;
3151 break;
3152 case snd_soc_dapm_supply:
62ea874a 3153 case snd_soc_dapm_regulator_supply:
d7e7eb91 3154 case snd_soc_dapm_clock_supply:
7ca3a18b
MB		 3155 w->power_check = dapm_supply_check_power;
3156 break;
888df395
MB		 3157 case snd_soc_dapm_dai:
3158 w->power_check = dapm_dai_check_power;
3159 break;
7ca3a18b
MB		 3160 default:
3161 w->power_check = dapm_always_on_check_power;
3162 break;
3163 }
3164
ce6120cc
LG		 3165 w->dapm = dapm;
3166 w->codec = dapm->codec;
b7950641 3167 w->platform = dapm->platform;
2b97eabc
RP		 3168 INIT_LIST_HEAD(&w->sources);
3169 INIT_LIST_HEAD(&w->sinks);
3170 INIT_LIST_HEAD(&w->list);
db432b41 3171 INIT_LIST_HEAD(&w->dirty);
97c866de 3172 list_add(&w->list, &dapm->card->widgets);
2b97eabc
RP		 3173
3174 /* machine layer set ups unconnected pins and insertions */
3175 w->connected = 1;
5ba06fc9 3176 return w;
2b97eabc 3177}
2b97eabc 3178
4ba1327a
MB		 3179/**
3180 * snd_soc_dapm_new_controls - create new dapm controls
ce6120cc 3181 * @dapm: DAPM context
4ba1327a
MB		 3182 * @widget: widget array
3183 * @num: number of widgets
3184 *
3185 * Creates new DAPM controls based upon the templates.
3186 *
3187 * Returns 0 for success else error.
3188 */
ce6120cc 3189int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
4ba1327a
MB		 3190 const struct snd_soc_dapm_widget *widget,
3191 int num)
3192{
5ba06fc9
MB		 3193 struct snd_soc_dapm_widget *w;
3194 int i;
60884c27 3195 int ret = 0;
4ba1327a 3196
a73fb2df 3197 mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
4ba1327a 3198 for (i = 0; i < num; i++) {
5ba06fc9
MB		 3199 w = snd_soc_dapm_new_control(dapm, widget);
3200 if (!w) {
f7d41ae8 3201 dev_err(dapm->dev,
5ba06fc9
MB		 3202 "ASoC: Failed to create DAPM control %s\n",
3203 widget->name);
60884c27
DC		 3204 ret = -ENOMEM;
3205 break;
b8b33cb5 3206 }
4ba1327a
MB		 3207 widget++;
3208 }
a73fb2df 3209 mutex_unlock(&dapm->card->dapm_mutex);
60884c27 3210 return ret;
4ba1327a
MB		 3211}
3212EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
3213
c74184ed
MB		 3214static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
3215 struct snd_kcontrol *kcontrol, int event)
3216{
3217 struct snd_soc_dapm_path *source_p, *sink_p;
3218 struct snd_soc_dai *source, *sink;
3219 const struct snd_soc_pcm_stream *config = w->params;
3220 struct snd_pcm_substream substream;
9747cec2 3221 struct snd_pcm_hw_params *params = NULL;
c74184ed
MB		 3222 u64 fmt;
3223 int ret;
3224
3225 BUG_ON(!config);
3226 BUG_ON(list_empty(&w->sources) || list_empty(&w->sinks));
3227
3228 /* We only support a single source and sink, pick the first */
3229 source_p = list_first_entry(&w->sources, struct snd_soc_dapm_path,
3230 list_sink);
3231 sink_p = list_first_entry(&w->sinks, struct snd_soc_dapm_path,
3232 list_source);
3233
3234 BUG_ON(!source_p || !sink_p);
3235 BUG_ON(!sink_p->source || !source_p->sink);
3236 BUG_ON(!source_p->source || !sink_p->sink);
3237
3238 source = source_p->source->priv;
3239 sink = sink_p->sink->priv;
3240
3241 /* Be a little careful as we don't want to overflow the mask array */
3242 if (config->formats) {
3243 fmt = ffs(config->formats) - 1;
3244 } else {
30a6a1a4 3245 dev_warn(w->dapm->dev, "ASoC: Invalid format %llx specified\n",
c74184ed
MB		 3246 config->formats);
3247 fmt = 0;
3248 }
3249
3250 /* Currently very limited parameter selection */
9747cec2
MB		 3251 params = kzalloc(sizeof(*params), GFP_KERNEL);
3252 if (!params) {
3253 ret = -ENOMEM;
3254 goto out;
3255 }
3256 snd_mask_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), fmt);
c74184ed 3257
9747cec2 3258 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->min =
c74184ed 3259 config->rate_min;
9747cec2 3260 hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE)->max =
c74184ed
MB		 3261 config->rate_max;
3262
9747cec2 3263 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->min
c74184ed 3264 = config->channels_min;
9747cec2 3265 hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS)->max
c74184ed
MB		 3266 = config->channels_max;
3267
3268 memset(&substream, 0, sizeof(substream));
3269
3270 switch (event) {
3271 case SND_SOC_DAPM_PRE_PMU:
3272 if (source->driver->ops && source->driver->ops->hw_params) {
3273 substream.stream = SNDRV_PCM_STREAM_CAPTURE;
3274 ret = source->driver->ops->hw_params(&substream,
9747cec2 3275 params, source);
c74184ed
MB		 3276 if (ret != 0) {
3277 dev_err(source->dev,
30a6a1a4 3278 "ASoC: hw_params() failed: %d\n", ret);
9747cec2 3279 goto out;
c74184ed
MB		 3280 }
3281 }
3282
3283 if (sink->driver->ops && sink->driver->ops->hw_params) {
3284 substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
9747cec2 3285 ret = sink->driver->ops->hw_params(&substream, params,
c74184ed
MB		 3286 sink);
3287 if (ret != 0) {
3288 dev_err(sink->dev,
30a6a1a4 3289 "ASoC: hw_params() failed: %d\n", ret);
9747cec2 3290 goto out;
c74184ed
MB		 3291 }
3292 }
3293 break;
3294
3295 case SND_SOC_DAPM_POST_PMU:
da18396f
MB		 3296 ret = snd_soc_dai_digital_mute(sink, 0,
3297 SNDRV_PCM_STREAM_PLAYBACK);
c74184ed 3298 if (ret != 0 && ret != -ENOTSUPP)
30a6a1a4 3299 dev_warn(sink->dev, "ASoC: Failed to unmute: %d\n", ret);
9747cec2 3300 ret = 0;
c74184ed
MB		 3301 break;
3302
3303 case SND_SOC_DAPM_PRE_PMD:
da18396f
MB		 3304 ret = snd_soc_dai_digital_mute(sink, 1,
3305 SNDRV_PCM_STREAM_PLAYBACK);
c74184ed 3306 if (ret != 0 && ret != -ENOTSUPP)
30a6a1a4 3307 dev_warn(sink->dev, "ASoC: Failed to mute: %d\n", ret);
9747cec2 3308 ret = 0;
c74184ed
MB		 3309 break;
3310
3311 default:
3312 BUG();
3313 return -EINVAL;
3314 }
3315
9747cec2
MB		 3316out:
3317 kfree(params);
3318 return ret;
c74184ed
MB		 3319}
3320
3321int snd_soc_dapm_new_pcm(struct snd_soc_card *card,
3322 const struct snd_soc_pcm_stream *params,
3323 struct snd_soc_dapm_widget *source,
3324 struct snd_soc_dapm_widget *sink)
3325{
3326 struct snd_soc_dapm_route routes[2];
3327 struct snd_soc_dapm_widget template;
3328 struct snd_soc_dapm_widget *w;
3329 size_t len;
3330 char *link_name;
3331
3332 len = strlen(source->name) + strlen(sink->name) + 2;
3333 link_name = devm_kzalloc(card->dev, len, GFP_KERNEL);
3334 if (!link_name)
3335 return -ENOMEM;
3336 snprintf(link_name, len, "%s-%s", source->name, sink->name);
3337
3338 memset(&template, 0, sizeof(template));
3339 template.reg = SND_SOC_NOPM;
3340 template.id = snd_soc_dapm_dai_link;
3341 template.name = link_name;
3342 template.event = snd_soc_dai_link_event;
3343 template.event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
3344 SND_SOC_DAPM_PRE_PMD;
3345
30a6a1a4 3346 dev_dbg(card->dev, "ASoC: adding %s widget\n", link_name);
c74184ed
MB		 3347
3348 w = snd_soc_dapm_new_control(&card->dapm, &template);
3349 if (!w) {
30a6a1a4 3350 dev_err(card->dev, "ASoC: Failed to create %s widget\n",
c74184ed
MB		 3351 link_name);
3352 return -ENOMEM;
3353 }
3354
3355 w->params = params;
3356
3357 memset(&routes, 0, sizeof(routes));
3358
3359 routes[0].source = source->name;
3360 routes[0].sink = link_name;
3361 routes[1].source = link_name;
3362 routes[1].sink = sink->name;
3363
3364 return snd_soc_dapm_add_routes(&card->dapm, routes,
3365 ARRAY_SIZE(routes));
3366}
3367
888df395
MB		 3368int snd_soc_dapm_new_dai_widgets(struct snd_soc_dapm_context *dapm,
3369 struct snd_soc_dai *dai)
2b97eabc 3370{
888df395 3371 struct snd_soc_dapm_widget template;
2b97eabc
RP		 3372 struct snd_soc_dapm_widget *w;
3373
888df395
MB		 3374 WARN_ON(dapm->dev != dai->dev);
3375
3376 memset(&template, 0, sizeof(template));
3377 template.reg = SND_SOC_NOPM;
3378
3379 if (dai->driver->playback.stream_name) {
3380 template.id = snd_soc_dapm_dai;
3381 template.name = dai->driver->playback.stream_name;
3382 template.sname = dai->driver->playback.stream_name;
3383
30a6a1a4 3384 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
888df395
MB		 3385 template.name);
3386
3387 w = snd_soc_dapm_new_control(dapm, &template);
3388 if (!w) {
30a6a1a4 3389 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
888df395
MB		 3390 dai->driver->playback.stream_name);
3391 }
3392
3393 w->priv = dai;
3394 dai->playback_widget = w;
3395 }
3396
3397 if (dai->driver->capture.stream_name) {
3398 template.id = snd_soc_dapm_dai;
3399 template.name = dai->driver->capture.stream_name;
3400 template.sname = dai->driver->capture.stream_name;
3401
30a6a1a4 3402 dev_dbg(dai->dev, "ASoC: adding %s widget\n",
888df395
MB		 3403 template.name);
3404
3405 w = snd_soc_dapm_new_control(dapm, &template);
3406 if (!w) {
30a6a1a4 3407 dev_err(dapm->dev, "ASoC: Failed to create %s widget\n",
888df395
MB		 3408 dai->driver->capture.stream_name);
3409 }
3410
3411 w->priv = dai;
3412 dai->capture_widget = w;
3413 }
3414
3415 return 0;
3416}
3417
3418int snd_soc_dapm_link_dai_widgets(struct snd_soc_card *card)
3419{
3420 struct snd_soc_dapm_widget *dai_w, *w;
3421 struct snd_soc_dai *dai;
3422 struct snd_soc_dapm_route r;
3423
3424 memset(&r, 0, sizeof(r));
3425
3426 /* For each DAI widget... */
3427 list_for_each_entry(dai_w, &card->widgets, list) {
3428 if (dai_w->id != snd_soc_dapm_dai)
2b97eabc 3429 continue;
888df395
MB		 3430
3431 dai = dai_w->priv;
3432
3433 /* ...find all widgets with the same stream and link them */
3434 list_for_each_entry(w, &card->widgets, list) {
3435 if (w->dapm != dai_w->dapm)
3436 continue;
3437
3438 if (w->id == snd_soc_dapm_dai)
3439 continue;
3440
3441 if (!w->sname)
3442 continue;
3443
3444 if (dai->driver->playback.stream_name &&
3445 strstr(w->sname,
3446 dai->driver->playback.stream_name)) {
3447 r.source = dai->playback_widget->name;
3448 r.sink = w->name;
3449 dev_dbg(dai->dev, "%s -> %s\n",
3450 r.source, r.sink);
3451
3452 snd_soc_dapm_add_route(w->dapm, &r);
3453 }
3454
3455 if (dai->driver->capture.stream_name &&
3456 strstr(w->sname,
3457 dai->driver->capture.stream_name)) {
3458 r.source = w->name;
3459 r.sink = dai->capture_widget->name;
3460 dev_dbg(dai->dev, "%s -> %s\n",
3461 r.source, r.sink);
3462
3463 snd_soc_dapm_add_route(w->dapm, &r);
2b97eabc
RP		 3464 }
3465 }
3466 }
2b97eabc 3467
888df395
MB		 3468 return 0;
3469}
64a648c2 3470
d9b0951b
LG		 3471static void soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3472 int event)
2b97eabc 3473{
7bd3a6f3 3474
d9b0951b
LG		 3475 struct snd_soc_dapm_widget *w_cpu, *w_codec;
3476 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
3477 struct snd_soc_dai *codec_dai = rtd->codec_dai;
7bd3a6f3 3478
d9b0951b
LG		 3479 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
3480 w_cpu = cpu_dai->playback_widget;
3481 w_codec = codec_dai->playback_widget;
3482 } else {
3483 w_cpu = cpu_dai->capture_widget;
3484 w_codec = codec_dai->capture_widget;
3485 }
2b97eabc 3486
d9b0951b 3487 if (w_cpu) {
fe360685 3488
d9b0951b
LG		 3489 dapm_mark_dirty(w_cpu, "stream event");
3490
3491 switch (event) {
3492 case SND_SOC_DAPM_STREAM_START:
3493 w_cpu->active = 1;
3494 break;
3495 case SND_SOC_DAPM_STREAM_STOP:
3496 w_cpu->active = 0;
3497 break;
3498 case SND_SOC_DAPM_STREAM_SUSPEND:
3499 case SND_SOC_DAPM_STREAM_RESUME:
3500 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3501 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3502 break;
3503 }
3504 }
3505
3506 if (w_codec) {
3507
3508 dapm_mark_dirty(w_codec, "stream event");
3509
3510 switch (event) {
3511 case SND_SOC_DAPM_STREAM_START:
3512 w_codec->active = 1;
3513 break;
3514 case SND_SOC_DAPM_STREAM_STOP:
3515 w_codec->active = 0;
3516 break;
3517 case SND_SOC_DAPM_STREAM_SUSPEND:
3518 case SND_SOC_DAPM_STREAM_RESUME:
3519 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
3520 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
3521 break;
3522 }
2b97eabc 3523 }
2b97eabc 3524
d9b0951b 3525 dapm_power_widgets(&rtd->card->dapm, event);
ce6120cc
LG		 3526}
3527
3528/**
3529 * snd_soc_dapm_stream_event - send a stream event to the dapm core
3530 * @rtd: PCM runtime data
3531 * @stream: stream name
3532 * @event: stream event
3533 *
3534 * Sends a stream event to the dapm core. The core then makes any
3535 * necessary widget power changes.
3536 *
3537 * Returns 0 for success else error.
3538 */
d9b0951b
LG		 3539void snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd, int stream,
3540 int event)
ce6120cc 3541{
a73fb2df 3542 struct snd_soc_card *card = rtd->card;
ce6120cc 3543
3cd04343 3544 mutex_lock_nested(&card->dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
d9b0951b 3545 soc_dapm_stream_event(rtd, stream, event);
a73fb2df 3546 mutex_unlock(&card->dapm_mutex);
2b97eabc 3547}
2b97eabc
RP		 3548
3549/**
a5302181 3550 * snd_soc_dapm_enable_pin - enable pin.
ce6120cc 3551 * @dapm: DAPM context
a5302181 3552 * @pin: pin name
2b97eabc 3553 *
74b8f955 3554 * Enables input/output pin and its parents or children widgets iff there is
a5302181
LG		 3555 * a valid audio route and active audio stream.
3556 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3557 * do any widget power switching.
2b97eabc 3558 */
ce6120cc 3559int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2b97eabc 3560{
ce6120cc 3561 return snd_soc_dapm_set_pin(dapm, pin, 1);
a5302181
LG		 3562}
3563EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2b97eabc 3564
da34183e
MB		 3565/**
3566 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
ce6120cc 3567 * @dapm: DAPM context
da34183e
MB		 3568 * @pin: pin name
3569 *
3570 * Enables input/output pin regardless of any other state. This is
3571 * intended for use with microphone bias supplies used in microphone
3572 * jack detection.
3573 *
3574 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3575 * do any widget power switching.
3576 */
ce6120cc
LG		 3577int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
3578 const char *pin)
da34183e 3579{
91a5fca4 3580 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
da34183e 3581
91a5fca4 3582 if (!w) {
30a6a1a4 3583 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
91a5fca4 3584 return -EINVAL;
0d86733c
MB		 3585 }
3586
30a6a1a4 3587 dev_dbg(w->dapm->dev, "ASoC: force enable pin %s\n", pin);
91a5fca4
LPC		 3588 w->connected = 1;
3589 w->force = 1;
75c1f891 3590 dapm_mark_dirty(w, "force enable");
da34183e 3591
91a5fca4 3592 return 0;
da34183e
MB		 3593}
3594EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
3595
a5302181
LG		 3596/**
3597 * snd_soc_dapm_disable_pin - disable pin.
ce6120cc 3598 * @dapm: DAPM context
a5302181
LG		 3599 * @pin: pin name
3600 *
74b8f955 3601 * Disables input/output pin and its parents or children widgets.
a5302181
LG		 3602 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3603 * do any widget power switching.
3604 */
ce6120cc
LG		 3605int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
3606 const char *pin)
a5302181 3607{
ce6120cc 3608 return snd_soc_dapm_set_pin(dapm, pin, 0);
2b97eabc 3609}
a5302181 3610EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2b97eabc 3611
5817b52a
MB		 3612/**
3613 * snd_soc_dapm_nc_pin - permanently disable pin.
ce6120cc 3614 * @dapm: DAPM context
5817b52a
MB		 3615 * @pin: pin name
3616 *
3617 * Marks the specified pin as being not connected, disabling it along
3618 * any parent or child widgets. At present this is identical to
3619 * snd_soc_dapm_disable_pin() but in future it will be extended to do
3620 * additional things such as disabling controls which only affect
3621 * paths through the pin.
3622 *
3623 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
3624 * do any widget power switching.
3625 */
ce6120cc 3626int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
5817b52a 3627{
ce6120cc 3628 return snd_soc_dapm_set_pin(dapm, pin, 0);
5817b52a
MB		 3629}
3630EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
3631
eeec12bf 3632/**
a5302181 3633 * snd_soc_dapm_get_pin_status - get audio pin status
ce6120cc 3634 * @dapm: DAPM context
a5302181 3635 * @pin: audio signal pin endpoint (or start point)
eeec12bf 3636 *
a5302181 3637 * Get audio pin status - connected or disconnected.
eeec12bf 3638 *
a5302181 3639 * Returns 1 for connected otherwise 0.
eeec12bf 3640 */
ce6120cc
LG		 3641int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
3642 const char *pin)
eeec12bf 3643{
91a5fca4 3644 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, true);
eeec12bf 3645
91a5fca4
LPC		 3646 if (w)
3647 return w->connected;
a68b38ad 3648
eeec12bf
GG		 3649 return 0;
3650}
a5302181 3651EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
eeec12bf 3652
1547aba9
MB		 3653/**
3654 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
ce6120cc 3655 * @dapm: DAPM context
1547aba9
MB		 3656 * @pin: audio signal pin endpoint (or start point)
3657 *
3658 * Mark the given endpoint or pin as ignoring suspend. When the
3659 * system is disabled a path between two endpoints flagged as ignoring
3660 * suspend will not be disabled. The path must already be enabled via
3661 * normal means at suspend time, it will not be turned on if it was not
3662 * already enabled.
3663 */
ce6120cc
LG		 3664int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
3665 const char *pin)
1547aba9 3666{
91a5fca4 3667 struct snd_soc_dapm_widget *w = dapm_find_widget(dapm, pin, false);
1547aba9 3668
91a5fca4 3669 if (!w) {
30a6a1a4 3670 dev_err(dapm->dev, "ASoC: unknown pin %s\n", pin);
91a5fca4 3671 return -EINVAL;
1547aba9
MB		 3672 }
3673
91a5fca4
LPC		 3674 w->ignore_suspend = 1;
3675
3676 return 0;
1547aba9
MB		 3677}
3678EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
3679
1633281b
SW		 3680static bool snd_soc_dapm_widget_in_card_paths(struct snd_soc_card *card,
3681 struct snd_soc_dapm_widget *w)
3682{
3683 struct snd_soc_dapm_path *p;
3684
3685 list_for_each_entry(p, &card->paths, list) {
3686 if ((p->source == w) || (p->sink == w)) {
3687 dev_dbg(card->dev,
3688 "... Path %s(id:%d dapm:%p) - %s(id:%d dapm:%p)\n",
3689 p->source->name, p->source->id, p->source->dapm,
3690 p->sink->name, p->sink->id, p->sink->dapm);
3691
3692 /* Connected to something other than the codec */
3693 if (p->source->dapm != p->sink->dapm)
3694 return true;
3695 /*
3696 * Loopback connection from codec external pin to
3697 * codec external pin
3698 */
3699 if (p->sink->id == snd_soc_dapm_input) {
3700 switch (p->source->id) {
3701 case snd_soc_dapm_output:
3702 case snd_soc_dapm_micbias:
3703 return true;
3704 default:
3705 break;
3706 }
3707 }
3708 }
3709 }
3710
3711 return false;
3712}
3713
3714/**
3715 * snd_soc_dapm_auto_nc_codec_pins - call snd_soc_dapm_nc_pin for unused pins
3716 * @codec: The codec whose pins should be processed
3717 *
3718 * Automatically call snd_soc_dapm_nc_pin() for any external pins in the codec
3719 * which are unused. Pins are used if they are connected externally to the
3720 * codec, whether that be to some other device, or a loop-back connection to
3721 * the codec itself.
3722 */
3723void snd_soc_dapm_auto_nc_codec_pins(struct snd_soc_codec *codec)
3724{
3725 struct snd_soc_card *card = codec->card;
3726 struct snd_soc_dapm_context *dapm = &codec->dapm;
3727 struct snd_soc_dapm_widget *w;
3728
30a6a1a4 3729 dev_dbg(codec->dev, "ASoC: Auto NC: DAPMs: card:%p codec:%p\n",
1633281b
SW		 3730 &card->dapm, &codec->dapm);
3731
3732 list_for_each_entry(w, &card->widgets, list) {
3733 if (w->dapm != dapm)
3734 continue;
3735 switch (w->id) {
3736 case snd_soc_dapm_input:
3737 case snd_soc_dapm_output:
3738 case snd_soc_dapm_micbias:
30a6a1a4 3739 dev_dbg(codec->dev, "ASoC: Auto NC: Checking widget %s\n",
1633281b
SW		 3740 w->name);
3741 if (!snd_soc_dapm_widget_in_card_paths(card, w)) {
a094b80b 3742 dev_dbg(codec->dev,
1633281b
SW		 3743 "... Not in map; disabling\n");
3744 snd_soc_dapm_nc_pin(dapm, w->name);
3745 }
3746 break;
3747 default:
3748 break;
3749 }
3750 }
3751}
3752
2b97eabc
RP		 3753/**
3754 * snd_soc_dapm_free - free dapm resources
728a5222 3755 * @dapm: DAPM context
2b97eabc
RP		 3756 *
3757 * Free all dapm widgets and resources.
3758 */
ce6120cc 3759void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2b97eabc 3760{
ce6120cc 3761 snd_soc_dapm_sys_remove(dapm->dev);
6c45e126 3762 dapm_debugfs_cleanup(dapm);
ce6120cc 3763 dapm_free_widgets(dapm);
7be31be8 3764 list_del(&dapm->list);
2b97eabc
RP		 3765}
3766EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
3767
ce6120cc 3768static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
51737470 3769{
01005a72 3770 struct snd_soc_card *card = dapm->card;
51737470
MB		 3771 struct snd_soc_dapm_widget *w;
3772 LIST_HEAD(down_list);
3773 int powerdown = 0;
3774
01005a72
LG		 3775 mutex_lock(&card->dapm_mutex);
3776
97c866de
JN		 3777 list_for_each_entry(w, &dapm->card->widgets, list) {
3778 if (w->dapm != dapm)
3779 continue;
51737470 3780 if (w->power) {
828a842f 3781 dapm_seq_insert(w, &down_list, false);
c2caa4da 3782 w->power = 0;
51737470
MB		 3783 powerdown = 1;
3784 }
3785 }
3786
3787 /* If there were no widgets to power down we're already in
3788 * standby.
3789 */
3790 if (powerdown) {
7679e42e
MB		 3791 if (dapm->bias_level == SND_SOC_BIAS_ON)
3792 snd_soc_dapm_set_bias_level(dapm,
3793 SND_SOC_BIAS_PREPARE);
828a842f 3794 dapm_seq_run(dapm, &down_list, 0, false);
7679e42e
MB		 3795 if (dapm->bias_level == SND_SOC_BIAS_PREPARE)
3796 snd_soc_dapm_set_bias_level(dapm,
3797 SND_SOC_BIAS_STANDBY);
51737470 3798 }
01005a72
LG		 3799
3800 mutex_unlock(&card->dapm_mutex);
f0fba2ad
LG		 3801}
3802
3803/*
3804 * snd_soc_dapm_shutdown - callback for system shutdown
3805 */
3806void snd_soc_dapm_shutdown(struct snd_soc_card *card)
3807{
3808 struct snd_soc_codec *codec;
3809
445632ad 3810 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
ce6120cc 3811 soc_dapm_shutdown_codec(&codec->dapm);
7679e42e
MB		 3812 if (codec->dapm.bias_level == SND_SOC_BIAS_STANDBY)
3813 snd_soc_dapm_set_bias_level(&codec->dapm,
3814 SND_SOC_BIAS_OFF);
ce6120cc 3815 }
51737470
MB		 3816}
3817
2b97eabc 3818/* Module information */
d331124d 3819MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2b97eabc
RP		 3820MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
3821MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)