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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 | |
15 | * DAC's/ADC's. | |
16 | * o Platform power domain - can support external components i.e. amps and | |
17 | * mic/meadphone insertion events. | |
18 | * o Automatic Mic Bias support | |
19 | * o Jack insertion power event initiation - e.g. hp insertion will enable | |
20 | * sinks, dacs, etc | |
3a4fa0a2 | 21 | * o Delayed powerdown of audio susbsystem to reduce pops between a quick |
2b97eabc RP |
22 | * device reopen. |
23 | * | |
24 | * Todo: | |
25 | * o DAPM power change sequencing - allow for configurable per | |
26 | * codec sequences. | |
27 | * o Support for analogue bias optimisation. | |
28 | * o Support for reduced codec oversampling rates. | |
29 | * o Support for reduced codec bias currents. | |
30 | */ | |
31 | ||
32 | #include <linux/module.h> | |
33 | #include <linux/moduleparam.h> | |
34 | #include <linux/init.h> | |
35 | #include <linux/delay.h> | |
36 | #include <linux/pm.h> | |
37 | #include <linux/bitops.h> | |
38 | #include <linux/platform_device.h> | |
39 | #include <linux/jiffies.h> | |
2b97eabc RP |
40 | #include <sound/core.h> |
41 | #include <sound/pcm.h> | |
42 | #include <sound/pcm_params.h> | |
43 | #include <sound/soc-dapm.h> | |
44 | #include <sound/initval.h> | |
45 | ||
46 | /* debug */ | |
c1286b86 | 47 | #ifdef DEBUG |
2b97eabc | 48 | #define dump_dapm(codec, action) dbg_dump_dapm(codec, action) |
2b97eabc RP |
49 | #else |
50 | #define dump_dapm(codec, action) | |
2b97eabc RP |
51 | #endif |
52 | ||
2b97eabc RP |
53 | /* dapm power sequences - make this per codec in the future */ |
54 | static int dapm_up_seq[] = { | |
55 | snd_soc_dapm_pre, snd_soc_dapm_micbias, snd_soc_dapm_mic, | |
2e72f8e3 PU |
56 | snd_soc_dapm_mux, snd_soc_dapm_value_mux, snd_soc_dapm_dac, |
57 | snd_soc_dapm_mixer, snd_soc_dapm_pga, snd_soc_dapm_adc, snd_soc_dapm_hp, | |
58 | snd_soc_dapm_spk, snd_soc_dapm_post | |
2b97eabc RP |
59 | }; |
60 | static int dapm_down_seq[] = { | |
61 | snd_soc_dapm_pre, snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk, | |
62 | snd_soc_dapm_pga, snd_soc_dapm_mixer, snd_soc_dapm_dac, snd_soc_dapm_mic, | |
2e72f8e3 PU |
63 | snd_soc_dapm_micbias, snd_soc_dapm_mux, snd_soc_dapm_value_mux, |
64 | snd_soc_dapm_post | |
2b97eabc RP |
65 | }; |
66 | ||
67 | static int dapm_status = 1; | |
68 | module_param(dapm_status, int, 0); | |
69 | MODULE_PARM_DESC(dapm_status, "enable DPM sysfs entries"); | |
70 | ||
12ef193d | 71 | static void pop_wait(u32 pop_time) |
15e4c72f MB |
72 | { |
73 | if (pop_time) | |
74 | schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time)); | |
75 | } | |
76 | ||
12ef193d | 77 | static void pop_dbg(u32 pop_time, const char *fmt, ...) |
15e4c72f MB |
78 | { |
79 | va_list args; | |
80 | ||
81 | va_start(args, fmt); | |
82 | ||
83 | if (pop_time) { | |
84 | vprintk(fmt, args); | |
12ef193d | 85 | pop_wait(pop_time); |
15e4c72f MB |
86 | } |
87 | ||
88 | va_end(args); | |
89 | } | |
90 | ||
2b97eabc | 91 | /* create a new dapm widget */ |
88cb4290 | 92 | static inline struct snd_soc_dapm_widget *dapm_cnew_widget( |
2b97eabc RP |
93 | const struct snd_soc_dapm_widget *_widget) |
94 | { | |
88cb4290 | 95 | return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL); |
2b97eabc RP |
96 | } |
97 | ||
98 | /* set up initial codec paths */ | |
99 | static void dapm_set_path_status(struct snd_soc_dapm_widget *w, | |
100 | struct snd_soc_dapm_path *p, int i) | |
101 | { | |
102 | switch (w->id) { | |
103 | case snd_soc_dapm_switch: | |
104 | case snd_soc_dapm_mixer: { | |
105 | int val; | |
4eaa9819 JS |
106 | struct soc_mixer_control *mc = (struct soc_mixer_control *) |
107 | w->kcontrols[i].private_value; | |
815ecf8d JS |
108 | unsigned int reg = mc->reg; |
109 | unsigned int shift = mc->shift; | |
4eaa9819 | 110 | int max = mc->max; |
815ecf8d JS |
111 | unsigned int mask = (1 << fls(max)) - 1; |
112 | unsigned int invert = mc->invert; | |
2b97eabc RP |
113 | |
114 | val = snd_soc_read(w->codec, reg); | |
115 | val = (val >> shift) & mask; | |
116 | ||
117 | if ((invert && !val) || (!invert && val)) | |
118 | p->connect = 1; | |
119 | else | |
120 | p->connect = 0; | |
121 | } | |
122 | break; | |
123 | case snd_soc_dapm_mux: { | |
124 | struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value; | |
125 | int val, item, bitmask; | |
126 | ||
f8ba0b7b | 127 | for (bitmask = 1; bitmask < e->max; bitmask <<= 1) |
2b97eabc RP |
128 | ; |
129 | val = snd_soc_read(w->codec, e->reg); | |
130 | item = (val >> e->shift_l) & (bitmask - 1); | |
131 | ||
132 | p->connect = 0; | |
f8ba0b7b | 133 | for (i = 0; i < e->max; i++) { |
2b97eabc RP |
134 | if (!(strcmp(p->name, e->texts[i])) && item == i) |
135 | p->connect = 1; | |
136 | } | |
137 | } | |
138 | break; | |
2e72f8e3 | 139 | case snd_soc_dapm_value_mux: { |
74155556 | 140 | struct soc_enum *e = (struct soc_enum *) |
2e72f8e3 PU |
141 | w->kcontrols[i].private_value; |
142 | int val, item; | |
143 | ||
144 | val = snd_soc_read(w->codec, e->reg); | |
145 | val = (val >> e->shift_l) & e->mask; | |
146 | for (item = 0; item < e->max; item++) { | |
147 | if (val == e->values[item]) | |
148 | break; | |
149 | } | |
150 | ||
151 | p->connect = 0; | |
152 | for (i = 0; i < e->max; i++) { | |
153 | if (!(strcmp(p->name, e->texts[i])) && item == i) | |
154 | p->connect = 1; | |
155 | } | |
156 | } | |
157 | break; | |
2b97eabc RP |
158 | /* does not effect routing - always connected */ |
159 | case snd_soc_dapm_pga: | |
160 | case snd_soc_dapm_output: | |
161 | case snd_soc_dapm_adc: | |
162 | case snd_soc_dapm_input: | |
163 | case snd_soc_dapm_dac: | |
164 | case snd_soc_dapm_micbias: | |
165 | case snd_soc_dapm_vmid: | |
166 | p->connect = 1; | |
167 | break; | |
168 | /* does effect routing - dynamically connected */ | |
169 | case snd_soc_dapm_hp: | |
170 | case snd_soc_dapm_mic: | |
171 | case snd_soc_dapm_spk: | |
172 | case snd_soc_dapm_line: | |
173 | case snd_soc_dapm_pre: | |
174 | case snd_soc_dapm_post: | |
175 | p->connect = 0; | |
176 | break; | |
177 | } | |
178 | } | |
179 | ||
180 | /* connect mux widget to it's interconnecting audio paths */ | |
181 | static int dapm_connect_mux(struct snd_soc_codec *codec, | |
182 | struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest, | |
183 | struct snd_soc_dapm_path *path, const char *control_name, | |
184 | const struct snd_kcontrol_new *kcontrol) | |
185 | { | |
186 | struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; | |
187 | int i; | |
188 | ||
f8ba0b7b | 189 | for (i = 0; i < e->max; i++) { |
2b97eabc RP |
190 | if (!(strcmp(control_name, e->texts[i]))) { |
191 | list_add(&path->list, &codec->dapm_paths); | |
192 | list_add(&path->list_sink, &dest->sources); | |
193 | list_add(&path->list_source, &src->sinks); | |
194 | path->name = (char*)e->texts[i]; | |
195 | dapm_set_path_status(dest, path, 0); | |
196 | return 0; | |
197 | } | |
198 | } | |
199 | ||
200 | return -ENODEV; | |
201 | } | |
202 | ||
203 | /* connect mixer widget to it's interconnecting audio paths */ | |
204 | static int dapm_connect_mixer(struct snd_soc_codec *codec, | |
205 | struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest, | |
206 | struct snd_soc_dapm_path *path, const char *control_name) | |
207 | { | |
208 | int i; | |
209 | ||
210 | /* search for mixer kcontrol */ | |
211 | for (i = 0; i < dest->num_kcontrols; i++) { | |
212 | if (!strcmp(control_name, dest->kcontrols[i].name)) { | |
213 | list_add(&path->list, &codec->dapm_paths); | |
214 | list_add(&path->list_sink, &dest->sources); | |
215 | list_add(&path->list_source, &src->sinks); | |
216 | path->name = dest->kcontrols[i].name; | |
217 | dapm_set_path_status(dest, path, i); | |
218 | return 0; | |
219 | } | |
220 | } | |
221 | return -ENODEV; | |
222 | } | |
223 | ||
224 | /* update dapm codec register bits */ | |
225 | static int dapm_update_bits(struct snd_soc_dapm_widget *widget) | |
226 | { | |
227 | int change, power; | |
228 | unsigned short old, new; | |
229 | struct snd_soc_codec *codec = widget->codec; | |
230 | ||
231 | /* check for valid widgets */ | |
232 | if (widget->reg < 0 || widget->id == snd_soc_dapm_input || | |
233 | widget->id == snd_soc_dapm_output || | |
234 | widget->id == snd_soc_dapm_hp || | |
235 | widget->id == snd_soc_dapm_mic || | |
236 | widget->id == snd_soc_dapm_line || | |
237 | widget->id == snd_soc_dapm_spk) | |
238 | return 0; | |
239 | ||
240 | power = widget->power; | |
241 | if (widget->invert) | |
242 | power = (power ? 0:1); | |
243 | ||
244 | old = snd_soc_read(codec, widget->reg); | |
245 | new = (old & ~(0x1 << widget->shift)) | (power << widget->shift); | |
246 | ||
247 | change = old != new; | |
248 | if (change) { | |
12ef193d TK |
249 | pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n", |
250 | widget->name, widget->power ? "on" : "off", | |
251 | codec->pop_time); | |
2b97eabc | 252 | snd_soc_write(codec, widget->reg, new); |
12ef193d | 253 | pop_wait(codec->pop_time); |
2b97eabc | 254 | } |
c1286b86 MB |
255 | pr_debug("reg %x old %x new %x change %d\n", widget->reg, |
256 | old, new, change); | |
2b97eabc RP |
257 | return change; |
258 | } | |
259 | ||
260 | /* ramps the volume up or down to minimise pops before or after a | |
261 | * DAPM power event */ | |
262 | static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power) | |
263 | { | |
264 | const struct snd_kcontrol_new *k = widget->kcontrols; | |
265 | ||
266 | if (widget->muted && !power) | |
267 | return 0; | |
268 | if (!widget->muted && power) | |
269 | return 0; | |
270 | ||
271 | if (widget->num_kcontrols && k) { | |
4eaa9819 JS |
272 | struct soc_mixer_control *mc = |
273 | (struct soc_mixer_control *)k->private_value; | |
815ecf8d JS |
274 | unsigned int reg = mc->reg; |
275 | unsigned int shift = mc->shift; | |
4eaa9819 | 276 | int max = mc->max; |
815ecf8d JS |
277 | unsigned int mask = (1 << fls(max)) - 1; |
278 | unsigned int invert = mc->invert; | |
2b97eabc RP |
279 | |
280 | if (power) { | |
281 | int i; | |
282 | /* power up has happended, increase volume to last level */ | |
283 | if (invert) { | |
4eaa9819 | 284 | for (i = max; i > widget->saved_value; i--) |
2b97eabc RP |
285 | snd_soc_update_bits(widget->codec, reg, mask, i); |
286 | } else { | |
287 | for (i = 0; i < widget->saved_value; i++) | |
288 | snd_soc_update_bits(widget->codec, reg, mask, i); | |
289 | } | |
290 | widget->muted = 0; | |
291 | } else { | |
292 | /* power down is about to occur, decrease volume to mute */ | |
293 | int val = snd_soc_read(widget->codec, reg); | |
294 | int i = widget->saved_value = (val >> shift) & mask; | |
295 | if (invert) { | |
296 | for (; i < mask; i++) | |
297 | snd_soc_update_bits(widget->codec, reg, mask, i); | |
298 | } else { | |
299 | for (; i > 0; i--) | |
300 | snd_soc_update_bits(widget->codec, reg, mask, i); | |
301 | } | |
302 | widget->muted = 1; | |
303 | } | |
304 | } | |
305 | return 0; | |
306 | } | |
307 | ||
308 | /* create new dapm mixer control */ | |
309 | static int dapm_new_mixer(struct snd_soc_codec *codec, | |
310 | struct snd_soc_dapm_widget *w) | |
311 | { | |
312 | int i, ret = 0; | |
219b93f5 | 313 | size_t name_len; |
2b97eabc RP |
314 | struct snd_soc_dapm_path *path; |
315 | ||
316 | /* add kcontrol */ | |
317 | for (i = 0; i < w->num_kcontrols; i++) { | |
318 | ||
319 | /* match name */ | |
320 | list_for_each_entry(path, &w->sources, list_sink) { | |
321 | ||
322 | /* mixer/mux paths name must match control name */ | |
323 | if (path->name != (char*)w->kcontrols[i].name) | |
324 | continue; | |
325 | ||
326 | /* add dapm control with long name */ | |
219b93f5 MB |
327 | name_len = 2 + strlen(w->name) |
328 | + strlen(w->kcontrols[i].name); | |
329 | path->long_name = kmalloc(name_len, GFP_KERNEL); | |
2b97eabc RP |
330 | if (path->long_name == NULL) |
331 | return -ENOMEM; | |
332 | ||
219b93f5 MB |
333 | snprintf(path->long_name, name_len, "%s %s", |
334 | w->name, w->kcontrols[i].name); | |
335 | path->long_name[name_len - 1] = '\0'; | |
336 | ||
2b97eabc RP |
337 | path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w, |
338 | path->long_name); | |
339 | ret = snd_ctl_add(codec->card, path->kcontrol); | |
340 | if (ret < 0) { | |
341 | printk(KERN_ERR "asoc: failed to add dapm kcontrol %s\n", | |
342 | path->long_name); | |
343 | kfree(path->long_name); | |
344 | path->long_name = NULL; | |
345 | return ret; | |
346 | } | |
347 | } | |
348 | } | |
349 | return ret; | |
350 | } | |
351 | ||
352 | /* create new dapm mux control */ | |
353 | static int dapm_new_mux(struct snd_soc_codec *codec, | |
354 | struct snd_soc_dapm_widget *w) | |
355 | { | |
356 | struct snd_soc_dapm_path *path = NULL; | |
357 | struct snd_kcontrol *kcontrol; | |
358 | int ret = 0; | |
359 | ||
360 | if (!w->num_kcontrols) { | |
361 | printk(KERN_ERR "asoc: mux %s has no controls\n", w->name); | |
362 | return -EINVAL; | |
363 | } | |
364 | ||
365 | kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name); | |
366 | ret = snd_ctl_add(codec->card, kcontrol); | |
367 | if (ret < 0) | |
368 | goto err; | |
369 | ||
370 | list_for_each_entry(path, &w->sources, list_sink) | |
371 | path->kcontrol = kcontrol; | |
372 | ||
373 | return ret; | |
374 | ||
375 | err: | |
376 | printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name); | |
377 | return ret; | |
378 | } | |
379 | ||
380 | /* create new dapm volume control */ | |
381 | static int dapm_new_pga(struct snd_soc_codec *codec, | |
382 | struct snd_soc_dapm_widget *w) | |
383 | { | |
384 | struct snd_kcontrol *kcontrol; | |
385 | int ret = 0; | |
386 | ||
387 | if (!w->num_kcontrols) | |
388 | return -EINVAL; | |
389 | ||
390 | kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name); | |
391 | ret = snd_ctl_add(codec->card, kcontrol); | |
392 | if (ret < 0) { | |
393 | printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name); | |
394 | return ret; | |
395 | } | |
396 | ||
397 | return ret; | |
398 | } | |
399 | ||
400 | /* reset 'walked' bit for each dapm path */ | |
401 | static inline void dapm_clear_walk(struct snd_soc_codec *codec) | |
402 | { | |
403 | struct snd_soc_dapm_path *p; | |
404 | ||
405 | list_for_each_entry(p, &codec->dapm_paths, list) | |
406 | p->walked = 0; | |
407 | } | |
408 | ||
409 | /* | |
410 | * Recursively check for a completed path to an active or physically connected | |
411 | * output widget. Returns number of complete paths. | |
412 | */ | |
413 | static int is_connected_output_ep(struct snd_soc_dapm_widget *widget) | |
414 | { | |
415 | struct snd_soc_dapm_path *path; | |
416 | int con = 0; | |
417 | ||
418 | if (widget->id == snd_soc_dapm_adc && widget->active) | |
419 | return 1; | |
420 | ||
421 | if (widget->connected) { | |
422 | /* connected pin ? */ | |
423 | if (widget->id == snd_soc_dapm_output && !widget->ext) | |
424 | return 1; | |
425 | ||
426 | /* connected jack or spk ? */ | |
427 | if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk || | |
428 | widget->id == snd_soc_dapm_line) | |
429 | return 1; | |
430 | } | |
431 | ||
432 | list_for_each_entry(path, &widget->sinks, list_source) { | |
433 | if (path->walked) | |
434 | continue; | |
435 | ||
436 | if (path->sink && path->connect) { | |
437 | path->walked = 1; | |
438 | con += is_connected_output_ep(path->sink); | |
439 | } | |
440 | } | |
441 | ||
442 | return con; | |
443 | } | |
444 | ||
445 | /* | |
446 | * Recursively check for a completed path to an active or physically connected | |
447 | * input widget. Returns number of complete paths. | |
448 | */ | |
449 | static int is_connected_input_ep(struct snd_soc_dapm_widget *widget) | |
450 | { | |
451 | struct snd_soc_dapm_path *path; | |
452 | int con = 0; | |
453 | ||
454 | /* active stream ? */ | |
455 | if (widget->id == snd_soc_dapm_dac && widget->active) | |
456 | return 1; | |
457 | ||
458 | if (widget->connected) { | |
459 | /* connected pin ? */ | |
460 | if (widget->id == snd_soc_dapm_input && !widget->ext) | |
461 | return 1; | |
462 | ||
463 | /* connected VMID/Bias for lower pops */ | |
464 | if (widget->id == snd_soc_dapm_vmid) | |
465 | return 1; | |
466 | ||
467 | /* connected jack ? */ | |
468 | if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line) | |
469 | return 1; | |
470 | } | |
471 | ||
472 | list_for_each_entry(path, &widget->sources, list_sink) { | |
473 | if (path->walked) | |
474 | continue; | |
475 | ||
476 | if (path->source && path->connect) { | |
477 | path->walked = 1; | |
478 | con += is_connected_input_ep(path->source); | |
479 | } | |
480 | } | |
481 | ||
482 | return con; | |
483 | } | |
484 | ||
e2be2ccf JN |
485 | /* |
486 | * Handler for generic register modifier widget. | |
487 | */ | |
488 | int dapm_reg_event(struct snd_soc_dapm_widget *w, | |
489 | struct snd_kcontrol *kcontrol, int event) | |
490 | { | |
491 | unsigned int val; | |
492 | ||
493 | if (SND_SOC_DAPM_EVENT_ON(event)) | |
494 | val = w->on_val; | |
495 | else | |
496 | val = w->off_val; | |
497 | ||
498 | snd_soc_update_bits(w->codec, -(w->reg + 1), | |
499 | w->mask << w->shift, val << w->shift); | |
500 | ||
501 | return 0; | |
502 | } | |
11589418 | 503 | EXPORT_SYMBOL_GPL(dapm_reg_event); |
e2be2ccf | 504 | |
2b97eabc RP |
505 | /* |
506 | * Scan each dapm widget for complete audio path. | |
507 | * A complete path is a route that has valid endpoints i.e.:- | |
508 | * | |
509 | * o DAC to output pin. | |
510 | * o Input Pin to ADC. | |
511 | * o Input pin to Output pin (bypass, sidetone) | |
512 | * o DAC to ADC (loopback). | |
513 | */ | |
d9c96cf3 | 514 | static int dapm_power_widgets(struct snd_soc_codec *codec, int event) |
2b97eabc RP |
515 | { |
516 | struct snd_soc_dapm_widget *w; | |
517 | int in, out, i, c = 1, *seq = NULL, ret = 0, power_change, power; | |
518 | ||
519 | /* do we have a sequenced stream event */ | |
520 | if (event == SND_SOC_DAPM_STREAM_START) { | |
521 | c = ARRAY_SIZE(dapm_up_seq); | |
522 | seq = dapm_up_seq; | |
523 | } else if (event == SND_SOC_DAPM_STREAM_STOP) { | |
524 | c = ARRAY_SIZE(dapm_down_seq); | |
525 | seq = dapm_down_seq; | |
526 | } | |
527 | ||
528 | for(i = 0; i < c; i++) { | |
529 | list_for_each_entry(w, &codec->dapm_widgets, list) { | |
530 | ||
531 | /* is widget in stream order */ | |
532 | if (seq && seq[i] && w->id != seq[i]) | |
533 | continue; | |
534 | ||
535 | /* vmid - no action */ | |
536 | if (w->id == snd_soc_dapm_vmid) | |
537 | continue; | |
538 | ||
539 | /* active ADC */ | |
540 | if (w->id == snd_soc_dapm_adc && w->active) { | |
541 | in = is_connected_input_ep(w); | |
542 | dapm_clear_walk(w->codec); | |
543 | w->power = (in != 0) ? 1 : 0; | |
544 | dapm_update_bits(w); | |
545 | continue; | |
546 | } | |
547 | ||
548 | /* active DAC */ | |
549 | if (w->id == snd_soc_dapm_dac && w->active) { | |
550 | out = is_connected_output_ep(w); | |
551 | dapm_clear_walk(w->codec); | |
552 | w->power = (out != 0) ? 1 : 0; | |
553 | dapm_update_bits(w); | |
554 | continue; | |
555 | } | |
556 | ||
2b97eabc RP |
557 | /* pre and post event widgets */ |
558 | if (w->id == snd_soc_dapm_pre) { | |
559 | if (!w->event) | |
560 | continue; | |
561 | ||
562 | if (event == SND_SOC_DAPM_STREAM_START) { | |
9af6d956 LG |
563 | ret = w->event(w, |
564 | NULL, SND_SOC_DAPM_PRE_PMU); | |
2b97eabc RP |
565 | if (ret < 0) |
566 | return ret; | |
567 | } else if (event == SND_SOC_DAPM_STREAM_STOP) { | |
9af6d956 LG |
568 | ret = w->event(w, |
569 | NULL, SND_SOC_DAPM_PRE_PMD); | |
2b97eabc RP |
570 | if (ret < 0) |
571 | return ret; | |
572 | } | |
573 | continue; | |
574 | } | |
575 | if (w->id == snd_soc_dapm_post) { | |
576 | if (!w->event) | |
577 | continue; | |
578 | ||
579 | if (event == SND_SOC_DAPM_STREAM_START) { | |
9af6d956 LG |
580 | ret = w->event(w, |
581 | NULL, SND_SOC_DAPM_POST_PMU); | |
2b97eabc RP |
582 | if (ret < 0) |
583 | return ret; | |
584 | } else if (event == SND_SOC_DAPM_STREAM_STOP) { | |
9af6d956 LG |
585 | ret = w->event(w, |
586 | NULL, SND_SOC_DAPM_POST_PMD); | |
2b97eabc RP |
587 | if (ret < 0) |
588 | return ret; | |
589 | } | |
590 | continue; | |
591 | } | |
592 | ||
593 | /* all other widgets */ | |
594 | in = is_connected_input_ep(w); | |
595 | dapm_clear_walk(w->codec); | |
596 | out = is_connected_output_ep(w); | |
597 | dapm_clear_walk(w->codec); | |
598 | power = (out != 0 && in != 0) ? 1 : 0; | |
599 | power_change = (w->power == power) ? 0: 1; | |
600 | w->power = power; | |
601 | ||
2927d6ee MB |
602 | if (!power_change) |
603 | continue; | |
604 | ||
2b97eabc | 605 | /* call any power change event handlers */ |
2927d6ee MB |
606 | if (w->event) |
607 | pr_debug("power %s event for %s flags %x\n", | |
608 | w->power ? "on" : "off", | |
609 | w->name, w->event_flags); | |
610 | ||
611 | /* power up pre event */ | |
612 | if (power && w->event && | |
613 | (w->event_flags & SND_SOC_DAPM_PRE_PMU)) { | |
614 | ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU); | |
615 | if (ret < 0) | |
616 | return ret; | |
617 | } | |
618 | ||
619 | /* power down pre event */ | |
620 | if (!power && w->event && | |
621 | (w->event_flags & SND_SOC_DAPM_PRE_PMD)) { | |
622 | ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD); | |
623 | if (ret < 0) | |
624 | return ret; | |
625 | } | |
626 | ||
9dd8d812 MB |
627 | /* Lower PGA volume to reduce pops */ |
628 | if (w->id == snd_soc_dapm_pga && !power) | |
629 | dapm_set_pga(w, power); | |
630 | ||
2927d6ee MB |
631 | dapm_update_bits(w); |
632 | ||
9dd8d812 MB |
633 | /* Raise PGA volume to reduce pops */ |
634 | if (w->id == snd_soc_dapm_pga && power) | |
635 | dapm_set_pga(w, power); | |
636 | ||
2927d6ee MB |
637 | /* power up post event */ |
638 | if (power && w->event && | |
639 | (w->event_flags & SND_SOC_DAPM_POST_PMU)) { | |
640 | ret = w->event(w, | |
641 | NULL, SND_SOC_DAPM_POST_PMU); | |
642 | if (ret < 0) | |
643 | return ret; | |
644 | } | |
645 | ||
646 | /* power down post event */ | |
647 | if (!power && w->event && | |
648 | (w->event_flags & SND_SOC_DAPM_POST_PMD)) { | |
649 | ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD); | |
650 | if (ret < 0) | |
651 | return ret; | |
2b97eabc RP |
652 | } |
653 | } | |
654 | } | |
655 | ||
656 | return ret; | |
657 | } | |
658 | ||
c1286b86 | 659 | #ifdef DEBUG |
2b97eabc RP |
660 | static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action) |
661 | { | |
662 | struct snd_soc_dapm_widget *w; | |
663 | struct snd_soc_dapm_path *p = NULL; | |
664 | int in, out; | |
665 | ||
666 | printk("DAPM %s %s\n", codec->name, action); | |
667 | ||
668 | list_for_each_entry(w, &codec->dapm_widgets, list) { | |
669 | ||
670 | /* only display widgets that effect routing */ | |
671 | switch (w->id) { | |
672 | case snd_soc_dapm_pre: | |
673 | case snd_soc_dapm_post: | |
674 | case snd_soc_dapm_vmid: | |
675 | continue; | |
676 | case snd_soc_dapm_mux: | |
2e72f8e3 | 677 | case snd_soc_dapm_value_mux: |
2b97eabc RP |
678 | case snd_soc_dapm_output: |
679 | case snd_soc_dapm_input: | |
680 | case snd_soc_dapm_switch: | |
681 | case snd_soc_dapm_hp: | |
682 | case snd_soc_dapm_mic: | |
683 | case snd_soc_dapm_spk: | |
684 | case snd_soc_dapm_line: | |
685 | case snd_soc_dapm_micbias: | |
686 | case snd_soc_dapm_dac: | |
687 | case snd_soc_dapm_adc: | |
688 | case snd_soc_dapm_pga: | |
689 | case snd_soc_dapm_mixer: | |
690 | if (w->name) { | |
691 | in = is_connected_input_ep(w); | |
692 | dapm_clear_walk(w->codec); | |
693 | out = is_connected_output_ep(w); | |
694 | dapm_clear_walk(w->codec); | |
695 | printk("%s: %s in %d out %d\n", w->name, | |
696 | w->power ? "On":"Off",in, out); | |
697 | ||
698 | list_for_each_entry(p, &w->sources, list_sink) { | |
699 | if (p->connect) | |
700 | printk(" in %s %s\n", p->name ? p->name : "static", | |
701 | p->source->name); | |
702 | } | |
703 | list_for_each_entry(p, &w->sinks, list_source) { | |
2b97eabc RP |
704 | if (p->connect) |
705 | printk(" out %s %s\n", p->name ? p->name : "static", | |
706 | p->sink->name); | |
707 | } | |
708 | } | |
709 | break; | |
710 | } | |
711 | } | |
712 | } | |
713 | #endif | |
714 | ||
715 | /* test and update the power status of a mux widget */ | |
d9c96cf3 AB |
716 | static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget, |
717 | struct snd_kcontrol *kcontrol, int mask, | |
cb01e2b9 | 718 | int mux, int val, struct soc_enum *e) |
2b97eabc RP |
719 | { |
720 | struct snd_soc_dapm_path *path; | |
721 | int found = 0; | |
722 | ||
eff317d0 PU |
723 | if (widget->id != snd_soc_dapm_mux && |
724 | widget->id != snd_soc_dapm_value_mux) | |
2b97eabc RP |
725 | return -ENODEV; |
726 | ||
727 | if (!snd_soc_test_bits(widget->codec, e->reg, mask, val)) | |
728 | return 0; | |
729 | ||
730 | /* find dapm widget path assoc with kcontrol */ | |
731 | list_for_each_entry(path, &widget->codec->dapm_paths, list) { | |
732 | if (path->kcontrol != kcontrol) | |
733 | continue; | |
734 | ||
cb01e2b9 | 735 | if (!path->name || !e->texts[mux]) |
2b97eabc RP |
736 | continue; |
737 | ||
738 | found = 1; | |
739 | /* we now need to match the string in the enum to the path */ | |
cb01e2b9 | 740 | if (!(strcmp(path->name, e->texts[mux]))) |
2b97eabc RP |
741 | path->connect = 1; /* new connection */ |
742 | else | |
743 | path->connect = 0; /* old connection must be powered down */ | |
744 | } | |
745 | ||
3fccd8b1 | 746 | if (found) { |
2b97eabc | 747 | dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP); |
3fccd8b1 MB |
748 | dump_dapm(widget->codec, "mux power update"); |
749 | } | |
2b97eabc RP |
750 | |
751 | return 0; | |
752 | } | |
2b97eabc | 753 | |
1b075e3f | 754 | /* test and update the power status of a mixer or switch widget */ |
d9c96cf3 AB |
755 | static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget, |
756 | struct snd_kcontrol *kcontrol, int reg, | |
757 | int val_mask, int val, int invert) | |
2b97eabc RP |
758 | { |
759 | struct snd_soc_dapm_path *path; | |
760 | int found = 0; | |
761 | ||
1b075e3f M |
762 | if (widget->id != snd_soc_dapm_mixer && |
763 | widget->id != snd_soc_dapm_switch) | |
2b97eabc RP |
764 | return -ENODEV; |
765 | ||
766 | if (!snd_soc_test_bits(widget->codec, reg, val_mask, val)) | |
767 | return 0; | |
768 | ||
769 | /* find dapm widget path assoc with kcontrol */ | |
770 | list_for_each_entry(path, &widget->codec->dapm_paths, list) { | |
771 | if (path->kcontrol != kcontrol) | |
772 | continue; | |
773 | ||
774 | /* found, now check type */ | |
775 | found = 1; | |
776 | if (val) | |
777 | /* new connection */ | |
778 | path->connect = invert ? 0:1; | |
779 | else | |
780 | /* old connection must be powered down */ | |
781 | path->connect = invert ? 1:0; | |
782 | break; | |
783 | } | |
784 | ||
3fccd8b1 | 785 | if (found) { |
2b97eabc | 786 | dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP); |
3fccd8b1 MB |
787 | dump_dapm(widget->codec, "mixer power update"); |
788 | } | |
2b97eabc RP |
789 | |
790 | return 0; | |
791 | } | |
2b97eabc RP |
792 | |
793 | /* show dapm widget status in sys fs */ | |
794 | static ssize_t dapm_widget_show(struct device *dev, | |
795 | struct device_attribute *attr, char *buf) | |
796 | { | |
797 | struct snd_soc_device *devdata = dev_get_drvdata(dev); | |
798 | struct snd_soc_codec *codec = devdata->codec; | |
799 | struct snd_soc_dapm_widget *w; | |
800 | int count = 0; | |
801 | char *state = "not set"; | |
802 | ||
803 | list_for_each_entry(w, &codec->dapm_widgets, list) { | |
804 | ||
805 | /* only display widgets that burnm power */ | |
806 | switch (w->id) { | |
807 | case snd_soc_dapm_hp: | |
808 | case snd_soc_dapm_mic: | |
809 | case snd_soc_dapm_spk: | |
810 | case snd_soc_dapm_line: | |
811 | case snd_soc_dapm_micbias: | |
812 | case snd_soc_dapm_dac: | |
813 | case snd_soc_dapm_adc: | |
814 | case snd_soc_dapm_pga: | |
815 | case snd_soc_dapm_mixer: | |
816 | if (w->name) | |
817 | count += sprintf(buf + count, "%s: %s\n", | |
818 | w->name, w->power ? "On":"Off"); | |
819 | break; | |
820 | default: | |
821 | break; | |
822 | } | |
823 | } | |
824 | ||
0be9898a MB |
825 | switch (codec->bias_level) { |
826 | case SND_SOC_BIAS_ON: | |
827 | state = "On"; | |
2b97eabc | 828 | break; |
0be9898a MB |
829 | case SND_SOC_BIAS_PREPARE: |
830 | state = "Prepare"; | |
2b97eabc | 831 | break; |
0be9898a MB |
832 | case SND_SOC_BIAS_STANDBY: |
833 | state = "Standby"; | |
2b97eabc | 834 | break; |
0be9898a MB |
835 | case SND_SOC_BIAS_OFF: |
836 | state = "Off"; | |
2b97eabc RP |
837 | break; |
838 | } | |
839 | count += sprintf(buf + count, "PM State: %s\n", state); | |
840 | ||
841 | return count; | |
842 | } | |
843 | ||
844 | static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL); | |
845 | ||
846 | int snd_soc_dapm_sys_add(struct device *dev) | |
847 | { | |
f0062a92 MB |
848 | if (!dapm_status) |
849 | return 0; | |
12ef193d | 850 | return device_create_file(dev, &dev_attr_dapm_widget); |
2b97eabc RP |
851 | } |
852 | ||
853 | static void snd_soc_dapm_sys_remove(struct device *dev) | |
854 | { | |
15e4c72f | 855 | if (dapm_status) { |
2b97eabc | 856 | device_remove_file(dev, &dev_attr_dapm_widget); |
15e4c72f | 857 | } |
2b97eabc RP |
858 | } |
859 | ||
860 | /* free all dapm widgets and resources */ | |
d9c96cf3 | 861 | static void dapm_free_widgets(struct snd_soc_codec *codec) |
2b97eabc RP |
862 | { |
863 | struct snd_soc_dapm_widget *w, *next_w; | |
864 | struct snd_soc_dapm_path *p, *next_p; | |
865 | ||
866 | list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) { | |
867 | list_del(&w->list); | |
868 | kfree(w); | |
869 | } | |
870 | ||
871 | list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) { | |
872 | list_del(&p->list); | |
873 | kfree(p->long_name); | |
874 | kfree(p); | |
875 | } | |
876 | } | |
877 | ||
a5302181 LG |
878 | static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec, |
879 | char *pin, int status) | |
880 | { | |
881 | struct snd_soc_dapm_widget *w; | |
882 | ||
883 | list_for_each_entry(w, &codec->dapm_widgets, list) { | |
884 | if (!strcmp(w->name, pin)) { | |
c1286b86 | 885 | pr_debug("dapm: %s: pin %s\n", codec->name, pin); |
a5302181 LG |
886 | w->connected = status; |
887 | return 0; | |
888 | } | |
889 | } | |
890 | ||
c1286b86 | 891 | pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin); |
a5302181 LG |
892 | return -EINVAL; |
893 | } | |
894 | ||
2b97eabc | 895 | /** |
a5302181 | 896 | * snd_soc_dapm_sync - scan and power dapm paths |
2b97eabc RP |
897 | * @codec: audio codec |
898 | * | |
899 | * Walks all dapm audio paths and powers widgets according to their | |
900 | * stream or path usage. | |
901 | * | |
902 | * Returns 0 for success. | |
903 | */ | |
a5302181 | 904 | int snd_soc_dapm_sync(struct snd_soc_codec *codec) |
2b97eabc | 905 | { |
3fccd8b1 MB |
906 | int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP); |
907 | dump_dapm(codec, "sync"); | |
908 | return ret; | |
2b97eabc | 909 | } |
a5302181 | 910 | EXPORT_SYMBOL_GPL(snd_soc_dapm_sync); |
2b97eabc | 911 | |
105f1c28 MB |
912 | static int snd_soc_dapm_add_route(struct snd_soc_codec *codec, |
913 | const char *sink, const char *control, const char *source) | |
2b97eabc RP |
914 | { |
915 | struct snd_soc_dapm_path *path; | |
916 | struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w; | |
917 | int ret = 0; | |
918 | ||
919 | /* find src and dest widgets */ | |
920 | list_for_each_entry(w, &codec->dapm_widgets, list) { | |
921 | ||
922 | if (!wsink && !(strcmp(w->name, sink))) { | |
923 | wsink = w; | |
924 | continue; | |
925 | } | |
926 | if (!wsource && !(strcmp(w->name, source))) { | |
927 | wsource = w; | |
928 | } | |
929 | } | |
930 | ||
931 | if (wsource == NULL || wsink == NULL) | |
932 | return -ENODEV; | |
933 | ||
934 | path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL); | |
935 | if (!path) | |
936 | return -ENOMEM; | |
937 | ||
938 | path->source = wsource; | |
939 | path->sink = wsink; | |
940 | INIT_LIST_HEAD(&path->list); | |
941 | INIT_LIST_HEAD(&path->list_source); | |
942 | INIT_LIST_HEAD(&path->list_sink); | |
943 | ||
944 | /* check for external widgets */ | |
945 | if (wsink->id == snd_soc_dapm_input) { | |
946 | if (wsource->id == snd_soc_dapm_micbias || | |
947 | wsource->id == snd_soc_dapm_mic || | |
1e39221e SF |
948 | wsink->id == snd_soc_dapm_line || |
949 | wsink->id == snd_soc_dapm_output) | |
2b97eabc RP |
950 | wsink->ext = 1; |
951 | } | |
952 | if (wsource->id == snd_soc_dapm_output) { | |
953 | if (wsink->id == snd_soc_dapm_spk || | |
954 | wsink->id == snd_soc_dapm_hp || | |
1e39221e SF |
955 | wsink->id == snd_soc_dapm_line || |
956 | wsink->id == snd_soc_dapm_input) | |
2b97eabc RP |
957 | wsource->ext = 1; |
958 | } | |
959 | ||
960 | /* connect static paths */ | |
961 | if (control == NULL) { | |
962 | list_add(&path->list, &codec->dapm_paths); | |
963 | list_add(&path->list_sink, &wsink->sources); | |
964 | list_add(&path->list_source, &wsource->sinks); | |
965 | path->connect = 1; | |
966 | return 0; | |
967 | } | |
968 | ||
969 | /* connect dynamic paths */ | |
970 | switch(wsink->id) { | |
971 | case snd_soc_dapm_adc: | |
972 | case snd_soc_dapm_dac: | |
973 | case snd_soc_dapm_pga: | |
974 | case snd_soc_dapm_input: | |
975 | case snd_soc_dapm_output: | |
976 | case snd_soc_dapm_micbias: | |
977 | case snd_soc_dapm_vmid: | |
978 | case snd_soc_dapm_pre: | |
979 | case snd_soc_dapm_post: | |
980 | list_add(&path->list, &codec->dapm_paths); | |
981 | list_add(&path->list_sink, &wsink->sources); | |
982 | list_add(&path->list_source, &wsource->sinks); | |
983 | path->connect = 1; | |
984 | return 0; | |
985 | case snd_soc_dapm_mux: | |
74155556 | 986 | case snd_soc_dapm_value_mux: |
2b97eabc RP |
987 | ret = dapm_connect_mux(codec, wsource, wsink, path, control, |
988 | &wsink->kcontrols[0]); | |
989 | if (ret != 0) | |
990 | goto err; | |
991 | break; | |
992 | case snd_soc_dapm_switch: | |
993 | case snd_soc_dapm_mixer: | |
994 | ret = dapm_connect_mixer(codec, wsource, wsink, path, control); | |
995 | if (ret != 0) | |
996 | goto err; | |
997 | break; | |
998 | case snd_soc_dapm_hp: | |
999 | case snd_soc_dapm_mic: | |
1000 | case snd_soc_dapm_line: | |
1001 | case snd_soc_dapm_spk: | |
1002 | list_add(&path->list, &codec->dapm_paths); | |
1003 | list_add(&path->list_sink, &wsink->sources); | |
1004 | list_add(&path->list_source, &wsource->sinks); | |
1005 | path->connect = 0; | |
1006 | return 0; | |
1007 | } | |
1008 | return 0; | |
1009 | ||
1010 | err: | |
1011 | printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source, | |
1012 | control, sink); | |
1013 | kfree(path); | |
1014 | return ret; | |
1015 | } | |
105f1c28 | 1016 | |
105f1c28 MB |
1017 | /** |
1018 | * snd_soc_dapm_add_routes - Add routes between DAPM widgets | |
1019 | * @codec: codec | |
1020 | * @route: audio routes | |
1021 | * @num: number of routes | |
1022 | * | |
1023 | * Connects 2 dapm widgets together via a named audio path. The sink is | |
1024 | * the widget receiving the audio signal, whilst the source is the sender | |
1025 | * of the audio signal. | |
1026 | * | |
1027 | * Returns 0 for success else error. On error all resources can be freed | |
1028 | * with a call to snd_soc_card_free(). | |
1029 | */ | |
1030 | int snd_soc_dapm_add_routes(struct snd_soc_codec *codec, | |
1031 | const struct snd_soc_dapm_route *route, int num) | |
1032 | { | |
1033 | int i, ret; | |
1034 | ||
1035 | for (i = 0; i < num; i++) { | |
1036 | ret = snd_soc_dapm_add_route(codec, route->sink, | |
1037 | route->control, route->source); | |
1038 | if (ret < 0) { | |
1039 | printk(KERN_ERR "Failed to add route %s->%s\n", | |
1040 | route->source, | |
1041 | route->sink); | |
1042 | return ret; | |
1043 | } | |
1044 | route++; | |
1045 | } | |
1046 | ||
1047 | return 0; | |
1048 | } | |
1049 | EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes); | |
1050 | ||
2b97eabc RP |
1051 | /** |
1052 | * snd_soc_dapm_new_widgets - add new dapm widgets | |
1053 | * @codec: audio codec | |
1054 | * | |
1055 | * Checks the codec for any new dapm widgets and creates them if found. | |
1056 | * | |
1057 | * Returns 0 for success. | |
1058 | */ | |
1059 | int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec) | |
1060 | { | |
1061 | struct snd_soc_dapm_widget *w; | |
1062 | ||
2b97eabc RP |
1063 | list_for_each_entry(w, &codec->dapm_widgets, list) |
1064 | { | |
1065 | if (w->new) | |
1066 | continue; | |
1067 | ||
1068 | switch(w->id) { | |
1069 | case snd_soc_dapm_switch: | |
1070 | case snd_soc_dapm_mixer: | |
1071 | dapm_new_mixer(codec, w); | |
1072 | break; | |
1073 | case snd_soc_dapm_mux: | |
2e72f8e3 | 1074 | case snd_soc_dapm_value_mux: |
2b97eabc RP |
1075 | dapm_new_mux(codec, w); |
1076 | break; | |
1077 | case snd_soc_dapm_adc: | |
1078 | case snd_soc_dapm_dac: | |
1079 | case snd_soc_dapm_pga: | |
1080 | dapm_new_pga(codec, w); | |
1081 | break; | |
1082 | case snd_soc_dapm_input: | |
1083 | case snd_soc_dapm_output: | |
1084 | case snd_soc_dapm_micbias: | |
1085 | case snd_soc_dapm_spk: | |
1086 | case snd_soc_dapm_hp: | |
1087 | case snd_soc_dapm_mic: | |
1088 | case snd_soc_dapm_line: | |
1089 | case snd_soc_dapm_vmid: | |
1090 | case snd_soc_dapm_pre: | |
1091 | case snd_soc_dapm_post: | |
1092 | break; | |
1093 | } | |
1094 | w->new = 1; | |
1095 | } | |
1096 | ||
1097 | dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP); | |
2b97eabc RP |
1098 | return 0; |
1099 | } | |
1100 | EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets); | |
1101 | ||
1102 | /** | |
1103 | * snd_soc_dapm_get_volsw - dapm mixer get callback | |
1104 | * @kcontrol: mixer control | |
ac11a2b3 | 1105 | * @ucontrol: control element information |
2b97eabc RP |
1106 | * |
1107 | * Callback to get the value of a dapm mixer control. | |
1108 | * | |
1109 | * Returns 0 for success. | |
1110 | */ | |
1111 | int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol, | |
1112 | struct snd_ctl_elem_value *ucontrol) | |
1113 | { | |
1114 | struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); | |
4eaa9819 JS |
1115 | struct soc_mixer_control *mc = |
1116 | (struct soc_mixer_control *)kcontrol->private_value; | |
815ecf8d JS |
1117 | unsigned int reg = mc->reg; |
1118 | unsigned int shift = mc->shift; | |
1119 | unsigned int rshift = mc->rshift; | |
4eaa9819 | 1120 | int max = mc->max; |
815ecf8d JS |
1121 | unsigned int invert = mc->invert; |
1122 | unsigned int mask = (1 << fls(max)) - 1; | |
2b97eabc RP |
1123 | |
1124 | /* return the saved value if we are powered down */ | |
1125 | if (widget->id == snd_soc_dapm_pga && !widget->power) { | |
1126 | ucontrol->value.integer.value[0] = widget->saved_value; | |
1127 | return 0; | |
1128 | } | |
1129 | ||
1130 | ucontrol->value.integer.value[0] = | |
1131 | (snd_soc_read(widget->codec, reg) >> shift) & mask; | |
1132 | if (shift != rshift) | |
1133 | ucontrol->value.integer.value[1] = | |
1134 | (snd_soc_read(widget->codec, reg) >> rshift) & mask; | |
1135 | if (invert) { | |
1136 | ucontrol->value.integer.value[0] = | |
a7a4ac86 | 1137 | max - ucontrol->value.integer.value[0]; |
2b97eabc RP |
1138 | if (shift != rshift) |
1139 | ucontrol->value.integer.value[1] = | |
a7a4ac86 | 1140 | max - ucontrol->value.integer.value[1]; |
2b97eabc RP |
1141 | } |
1142 | ||
1143 | return 0; | |
1144 | } | |
1145 | EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw); | |
1146 | ||
1147 | /** | |
1148 | * snd_soc_dapm_put_volsw - dapm mixer set callback | |
1149 | * @kcontrol: mixer control | |
ac11a2b3 | 1150 | * @ucontrol: control element information |
2b97eabc RP |
1151 | * |
1152 | * Callback to set the value of a dapm mixer control. | |
1153 | * | |
1154 | * Returns 0 for success. | |
1155 | */ | |
1156 | int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol, | |
1157 | struct snd_ctl_elem_value *ucontrol) | |
1158 | { | |
1159 | struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); | |
4eaa9819 JS |
1160 | struct soc_mixer_control *mc = |
1161 | (struct soc_mixer_control *)kcontrol->private_value; | |
815ecf8d JS |
1162 | unsigned int reg = mc->reg; |
1163 | unsigned int shift = mc->shift; | |
1164 | unsigned int rshift = mc->rshift; | |
4eaa9819 | 1165 | int max = mc->max; |
815ecf8d JS |
1166 | unsigned int mask = (1 << fls(max)) - 1; |
1167 | unsigned int invert = mc->invert; | |
2b97eabc RP |
1168 | unsigned short val, val2, val_mask; |
1169 | int ret; | |
1170 | ||
1171 | val = (ucontrol->value.integer.value[0] & mask); | |
1172 | ||
1173 | if (invert) | |
a7a4ac86 | 1174 | val = max - val; |
2b97eabc RP |
1175 | val_mask = mask << shift; |
1176 | val = val << shift; | |
1177 | if (shift != rshift) { | |
1178 | val2 = (ucontrol->value.integer.value[1] & mask); | |
1179 | if (invert) | |
a7a4ac86 | 1180 | val2 = max - val2; |
2b97eabc RP |
1181 | val_mask |= mask << rshift; |
1182 | val |= val2 << rshift; | |
1183 | } | |
1184 | ||
1185 | mutex_lock(&widget->codec->mutex); | |
1186 | widget->value = val; | |
1187 | ||
1188 | /* save volume value if the widget is powered down */ | |
1189 | if (widget->id == snd_soc_dapm_pga && !widget->power) { | |
1190 | widget->saved_value = val; | |
1191 | mutex_unlock(&widget->codec->mutex); | |
1192 | return 1; | |
1193 | } | |
1194 | ||
1195 | dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert); | |
1196 | if (widget->event) { | |
1197 | if (widget->event_flags & SND_SOC_DAPM_PRE_REG) { | |
9af6d956 LG |
1198 | ret = widget->event(widget, kcontrol, |
1199 | SND_SOC_DAPM_PRE_REG); | |
1200 | if (ret < 0) { | |
1201 | ret = 1; | |
2b97eabc | 1202 | goto out; |
9af6d956 | 1203 | } |
2b97eabc RP |
1204 | } |
1205 | ret = snd_soc_update_bits(widget->codec, reg, val_mask, val); | |
1206 | if (widget->event_flags & SND_SOC_DAPM_POST_REG) | |
9af6d956 LG |
1207 | ret = widget->event(widget, kcontrol, |
1208 | SND_SOC_DAPM_POST_REG); | |
2b97eabc RP |
1209 | } else |
1210 | ret = snd_soc_update_bits(widget->codec, reg, val_mask, val); | |
1211 | ||
1212 | out: | |
1213 | mutex_unlock(&widget->codec->mutex); | |
1214 | return ret; | |
1215 | } | |
1216 | EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw); | |
1217 | ||
1218 | /** | |
1219 | * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback | |
1220 | * @kcontrol: mixer control | |
ac11a2b3 | 1221 | * @ucontrol: control element information |
2b97eabc RP |
1222 | * |
1223 | * Callback to get the value of a dapm enumerated double mixer control. | |
1224 | * | |
1225 | * Returns 0 for success. | |
1226 | */ | |
1227 | int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol, | |
1228 | struct snd_ctl_elem_value *ucontrol) | |
1229 | { | |
1230 | struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); | |
1231 | struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; | |
1232 | unsigned short val, bitmask; | |
1233 | ||
f8ba0b7b | 1234 | for (bitmask = 1; bitmask < e->max; bitmask <<= 1) |
2b97eabc RP |
1235 | ; |
1236 | val = snd_soc_read(widget->codec, e->reg); | |
1237 | ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1); | |
1238 | if (e->shift_l != e->shift_r) | |
1239 | ucontrol->value.enumerated.item[1] = | |
1240 | (val >> e->shift_r) & (bitmask - 1); | |
1241 | ||
1242 | return 0; | |
1243 | } | |
1244 | EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double); | |
1245 | ||
1246 | /** | |
1247 | * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback | |
1248 | * @kcontrol: mixer control | |
ac11a2b3 | 1249 | * @ucontrol: control element information |
2b97eabc RP |
1250 | * |
1251 | * Callback to set the value of a dapm enumerated double mixer control. | |
1252 | * | |
1253 | * Returns 0 for success. | |
1254 | */ | |
1255 | int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol, | |
1256 | struct snd_ctl_elem_value *ucontrol) | |
1257 | { | |
1258 | struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); | |
1259 | struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; | |
1260 | unsigned short val, mux; | |
1261 | unsigned short mask, bitmask; | |
1262 | int ret = 0; | |
1263 | ||
f8ba0b7b | 1264 | for (bitmask = 1; bitmask < e->max; bitmask <<= 1) |
2b97eabc | 1265 | ; |
f8ba0b7b | 1266 | if (ucontrol->value.enumerated.item[0] > e->max - 1) |
2b97eabc RP |
1267 | return -EINVAL; |
1268 | mux = ucontrol->value.enumerated.item[0]; | |
1269 | val = mux << e->shift_l; | |
1270 | mask = (bitmask - 1) << e->shift_l; | |
1271 | if (e->shift_l != e->shift_r) { | |
f8ba0b7b | 1272 | if (ucontrol->value.enumerated.item[1] > e->max - 1) |
2b97eabc RP |
1273 | return -EINVAL; |
1274 | val |= ucontrol->value.enumerated.item[1] << e->shift_r; | |
1275 | mask |= (bitmask - 1) << e->shift_r; | |
1276 | } | |
1277 | ||
1278 | mutex_lock(&widget->codec->mutex); | |
1279 | widget->value = val; | |
cb01e2b9 | 1280 | dapm_mux_update_power(widget, kcontrol, mask, mux, val, e); |
2b97eabc RP |
1281 | if (widget->event) { |
1282 | if (widget->event_flags & SND_SOC_DAPM_PRE_REG) { | |
9af6d956 LG |
1283 | ret = widget->event(widget, |
1284 | kcontrol, SND_SOC_DAPM_PRE_REG); | |
2b97eabc RP |
1285 | if (ret < 0) |
1286 | goto out; | |
1287 | } | |
1288 | ret = snd_soc_update_bits(widget->codec, e->reg, mask, val); | |
1289 | if (widget->event_flags & SND_SOC_DAPM_POST_REG) | |
9af6d956 LG |
1290 | ret = widget->event(widget, |
1291 | kcontrol, SND_SOC_DAPM_POST_REG); | |
2b97eabc RP |
1292 | } else |
1293 | ret = snd_soc_update_bits(widget->codec, e->reg, mask, val); | |
1294 | ||
1295 | out: | |
1296 | mutex_unlock(&widget->codec->mutex); | |
1297 | return ret; | |
1298 | } | |
1299 | EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double); | |
1300 | ||
2e72f8e3 PU |
1301 | /** |
1302 | * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get | |
1303 | * callback | |
1304 | * @kcontrol: mixer control | |
1305 | * @ucontrol: control element information | |
1306 | * | |
1307 | * Callback to get the value of a dapm semi enumerated double mixer control. | |
1308 | * | |
1309 | * Semi enumerated mixer: the enumerated items are referred as values. Can be | |
1310 | * used for handling bitfield coded enumeration for example. | |
1311 | * | |
1312 | * Returns 0 for success. | |
1313 | */ | |
1314 | int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol, | |
1315 | struct snd_ctl_elem_value *ucontrol) | |
1316 | { | |
1317 | struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); | |
74155556 | 1318 | struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; |
2e72f8e3 PU |
1319 | unsigned short reg_val, val, mux; |
1320 | ||
1321 | reg_val = snd_soc_read(widget->codec, e->reg); | |
1322 | val = (reg_val >> e->shift_l) & e->mask; | |
1323 | for (mux = 0; mux < e->max; mux++) { | |
1324 | if (val == e->values[mux]) | |
1325 | break; | |
1326 | } | |
1327 | ucontrol->value.enumerated.item[0] = mux; | |
1328 | if (e->shift_l != e->shift_r) { | |
1329 | val = (reg_val >> e->shift_r) & e->mask; | |
1330 | for (mux = 0; mux < e->max; mux++) { | |
1331 | if (val == e->values[mux]) | |
1332 | break; | |
1333 | } | |
1334 | ucontrol->value.enumerated.item[1] = mux; | |
1335 | } | |
1336 | ||
1337 | return 0; | |
1338 | } | |
1339 | EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double); | |
1340 | ||
1341 | /** | |
1342 | * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set | |
1343 | * callback | |
1344 | * @kcontrol: mixer control | |
1345 | * @ucontrol: control element information | |
1346 | * | |
1347 | * Callback to set the value of a dapm semi enumerated double mixer control. | |
1348 | * | |
1349 | * Semi enumerated mixer: the enumerated items are referred as values. Can be | |
1350 | * used for handling bitfield coded enumeration for example. | |
1351 | * | |
1352 | * Returns 0 for success. | |
1353 | */ | |
1354 | int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol, | |
1355 | struct snd_ctl_elem_value *ucontrol) | |
1356 | { | |
1357 | struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol); | |
74155556 | 1358 | struct soc_enum *e = (struct soc_enum *)kcontrol->private_value; |
2e72f8e3 PU |
1359 | unsigned short val, mux; |
1360 | unsigned short mask; | |
1361 | int ret = 0; | |
1362 | ||
1363 | if (ucontrol->value.enumerated.item[0] > e->max - 1) | |
1364 | return -EINVAL; | |
1365 | mux = ucontrol->value.enumerated.item[0]; | |
1366 | val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l; | |
1367 | mask = e->mask << e->shift_l; | |
1368 | if (e->shift_l != e->shift_r) { | |
1369 | if (ucontrol->value.enumerated.item[1] > e->max - 1) | |
1370 | return -EINVAL; | |
1371 | val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r; | |
1372 | mask |= e->mask << e->shift_r; | |
1373 | } | |
1374 | ||
1375 | mutex_lock(&widget->codec->mutex); | |
1376 | widget->value = val; | |
74155556 | 1377 | dapm_mux_update_power(widget, kcontrol, mask, mux, val, e); |
2e72f8e3 PU |
1378 | if (widget->event) { |
1379 | if (widget->event_flags & SND_SOC_DAPM_PRE_REG) { | |
1380 | ret = widget->event(widget, | |
1381 | kcontrol, SND_SOC_DAPM_PRE_REG); | |
1382 | if (ret < 0) | |
1383 | goto out; | |
1384 | } | |
1385 | ret = snd_soc_update_bits(widget->codec, e->reg, mask, val); | |
1386 | if (widget->event_flags & SND_SOC_DAPM_POST_REG) | |
1387 | ret = widget->event(widget, | |
1388 | kcontrol, SND_SOC_DAPM_POST_REG); | |
1389 | } else | |
1390 | ret = snd_soc_update_bits(widget->codec, e->reg, mask, val); | |
1391 | ||
1392 | out: | |
1393 | mutex_unlock(&widget->codec->mutex); | |
1394 | return ret; | |
1395 | } | |
1396 | EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double); | |
1397 | ||
2b97eabc RP |
1398 | /** |
1399 | * snd_soc_dapm_new_control - create new dapm control | |
1400 | * @codec: audio codec | |
1401 | * @widget: widget template | |
1402 | * | |
1403 | * Creates a new dapm control based upon the template. | |
1404 | * | |
1405 | * Returns 0 for success else error. | |
1406 | */ | |
1407 | int snd_soc_dapm_new_control(struct snd_soc_codec *codec, | |
1408 | const struct snd_soc_dapm_widget *widget) | |
1409 | { | |
1410 | struct snd_soc_dapm_widget *w; | |
1411 | ||
1412 | if ((w = dapm_cnew_widget(widget)) == NULL) | |
1413 | return -ENOMEM; | |
1414 | ||
1415 | w->codec = codec; | |
1416 | INIT_LIST_HEAD(&w->sources); | |
1417 | INIT_LIST_HEAD(&w->sinks); | |
1418 | INIT_LIST_HEAD(&w->list); | |
1419 | list_add(&w->list, &codec->dapm_widgets); | |
1420 | ||
1421 | /* machine layer set ups unconnected pins and insertions */ | |
1422 | w->connected = 1; | |
1423 | return 0; | |
1424 | } | |
1425 | EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control); | |
1426 | ||
4ba1327a MB |
1427 | /** |
1428 | * snd_soc_dapm_new_controls - create new dapm controls | |
1429 | * @codec: audio codec | |
1430 | * @widget: widget array | |
1431 | * @num: number of widgets | |
1432 | * | |
1433 | * Creates new DAPM controls based upon the templates. | |
1434 | * | |
1435 | * Returns 0 for success else error. | |
1436 | */ | |
1437 | int snd_soc_dapm_new_controls(struct snd_soc_codec *codec, | |
1438 | const struct snd_soc_dapm_widget *widget, | |
1439 | int num) | |
1440 | { | |
1441 | int i, ret; | |
1442 | ||
1443 | for (i = 0; i < num; i++) { | |
1444 | ret = snd_soc_dapm_new_control(codec, widget); | |
b8b33cb5 MB |
1445 | if (ret < 0) { |
1446 | printk(KERN_ERR | |
1447 | "ASoC: Failed to create DAPM control %s: %d\n", | |
1448 | widget->name, ret); | |
4ba1327a | 1449 | return ret; |
b8b33cb5 | 1450 | } |
4ba1327a MB |
1451 | widget++; |
1452 | } | |
1453 | return 0; | |
1454 | } | |
1455 | EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls); | |
1456 | ||
1457 | ||
2b97eabc RP |
1458 | /** |
1459 | * snd_soc_dapm_stream_event - send a stream event to the dapm core | |
1460 | * @codec: audio codec | |
1461 | * @stream: stream name | |
1462 | * @event: stream event | |
1463 | * | |
1464 | * Sends a stream event to the dapm core. The core then makes any | |
1465 | * necessary widget power changes. | |
1466 | * | |
1467 | * Returns 0 for success else error. | |
1468 | */ | |
1469 | int snd_soc_dapm_stream_event(struct snd_soc_codec *codec, | |
1470 | char *stream, int event) | |
1471 | { | |
1472 | struct snd_soc_dapm_widget *w; | |
1473 | ||
11da21a7 SF |
1474 | if (stream == NULL) |
1475 | return 0; | |
1476 | ||
2b97eabc RP |
1477 | mutex_lock(&codec->mutex); |
1478 | list_for_each_entry(w, &codec->dapm_widgets, list) | |
1479 | { | |
1480 | if (!w->sname) | |
1481 | continue; | |
c1286b86 MB |
1482 | pr_debug("widget %s\n %s stream %s event %d\n", |
1483 | w->name, w->sname, stream, event); | |
2b97eabc RP |
1484 | if (strstr(w->sname, stream)) { |
1485 | switch(event) { | |
1486 | case SND_SOC_DAPM_STREAM_START: | |
1487 | w->active = 1; | |
1488 | break; | |
1489 | case SND_SOC_DAPM_STREAM_STOP: | |
1490 | w->active = 0; | |
1491 | break; | |
1492 | case SND_SOC_DAPM_STREAM_SUSPEND: | |
1493 | if (w->active) | |
1494 | w->suspend = 1; | |
1495 | w->active = 0; | |
1496 | break; | |
1497 | case SND_SOC_DAPM_STREAM_RESUME: | |
1498 | if (w->suspend) { | |
1499 | w->active = 1; | |
1500 | w->suspend = 0; | |
1501 | } | |
1502 | break; | |
1503 | case SND_SOC_DAPM_STREAM_PAUSE_PUSH: | |
1504 | break; | |
1505 | case SND_SOC_DAPM_STREAM_PAUSE_RELEASE: | |
1506 | break; | |
1507 | } | |
1508 | } | |
1509 | } | |
1510 | mutex_unlock(&codec->mutex); | |
1511 | ||
1512 | dapm_power_widgets(codec, event); | |
9bf8e7dd | 1513 | dump_dapm(codec, __func__); |
2b97eabc RP |
1514 | return 0; |
1515 | } | |
1516 | EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event); | |
1517 | ||
0b4d221b | 1518 | /** |
0be9898a | 1519 | * snd_soc_dapm_set_bias_level - set the bias level for the system |
0b4d221b | 1520 | * @socdev: audio device |
0be9898a | 1521 | * @level: level to configure |
0b4d221b | 1522 | * |
0be9898a | 1523 | * Configure the bias (power) levels for the SoC audio device. |
0b4d221b LG |
1524 | * |
1525 | * Returns 0 for success else error. | |
1526 | */ | |
0be9898a MB |
1527 | int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev, |
1528 | enum snd_soc_bias_level level) | |
0b4d221b LG |
1529 | { |
1530 | struct snd_soc_codec *codec = socdev->codec; | |
87506549 | 1531 | struct snd_soc_card *card = socdev->card; |
0be9898a | 1532 | int ret = 0; |
0b4d221b | 1533 | |
87506549 MB |
1534 | if (card->set_bias_level) |
1535 | ret = card->set_bias_level(card, level); | |
0be9898a MB |
1536 | if (ret == 0 && codec->set_bias_level) |
1537 | ret = codec->set_bias_level(codec, level); | |
1538 | ||
1539 | return ret; | |
0b4d221b | 1540 | } |
0b4d221b | 1541 | |
2b97eabc | 1542 | /** |
a5302181 | 1543 | * snd_soc_dapm_enable_pin - enable pin. |
ac11a2b3 | 1544 | * @codec: SoC codec |
a5302181 | 1545 | * @pin: pin name |
2b97eabc | 1546 | * |
a5302181 LG |
1547 | * Enables input/output pin and it's parents or children widgets iff there is |
1548 | * a valid audio route and active audio stream. | |
1549 | * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to | |
1550 | * do any widget power switching. | |
2b97eabc | 1551 | */ |
a5302181 | 1552 | int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, char *pin) |
2b97eabc | 1553 | { |
a5302181 LG |
1554 | return snd_soc_dapm_set_pin(codec, pin, 1); |
1555 | } | |
1556 | EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin); | |
2b97eabc | 1557 | |
a5302181 LG |
1558 | /** |
1559 | * snd_soc_dapm_disable_pin - disable pin. | |
1560 | * @codec: SoC codec | |
1561 | * @pin: pin name | |
1562 | * | |
1563 | * Disables input/output pin and it's parents or children widgets. | |
1564 | * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to | |
1565 | * do any widget power switching. | |
1566 | */ | |
1567 | int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, char *pin) | |
1568 | { | |
1569 | return snd_soc_dapm_set_pin(codec, pin, 0); | |
2b97eabc | 1570 | } |
a5302181 | 1571 | EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin); |
2b97eabc | 1572 | |
5817b52a MB |
1573 | /** |
1574 | * snd_soc_dapm_nc_pin - permanently disable pin. | |
1575 | * @codec: SoC codec | |
1576 | * @pin: pin name | |
1577 | * | |
1578 | * Marks the specified pin as being not connected, disabling it along | |
1579 | * any parent or child widgets. At present this is identical to | |
1580 | * snd_soc_dapm_disable_pin() but in future it will be extended to do | |
1581 | * additional things such as disabling controls which only affect | |
1582 | * paths through the pin. | |
1583 | * | |
1584 | * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to | |
1585 | * do any widget power switching. | |
1586 | */ | |
1587 | int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, char *pin) | |
1588 | { | |
1589 | return snd_soc_dapm_set_pin(codec, pin, 0); | |
1590 | } | |
1591 | EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin); | |
1592 | ||
eeec12bf | 1593 | /** |
a5302181 | 1594 | * snd_soc_dapm_get_pin_status - get audio pin status |
eeec12bf | 1595 | * @codec: audio codec |
a5302181 | 1596 | * @pin: audio signal pin endpoint (or start point) |
eeec12bf | 1597 | * |
a5302181 | 1598 | * Get audio pin status - connected or disconnected. |
eeec12bf | 1599 | * |
a5302181 | 1600 | * Returns 1 for connected otherwise 0. |
eeec12bf | 1601 | */ |
a5302181 | 1602 | int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, char *pin) |
eeec12bf GG |
1603 | { |
1604 | struct snd_soc_dapm_widget *w; | |
1605 | ||
1606 | list_for_each_entry(w, &codec->dapm_widgets, list) { | |
a5302181 | 1607 | if (!strcmp(w->name, pin)) |
eeec12bf GG |
1608 | return w->connected; |
1609 | } | |
1610 | ||
1611 | return 0; | |
1612 | } | |
a5302181 | 1613 | EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status); |
eeec12bf | 1614 | |
2b97eabc RP |
1615 | /** |
1616 | * snd_soc_dapm_free - free dapm resources | |
1617 | * @socdev: SoC device | |
1618 | * | |
1619 | * Free all dapm widgets and resources. | |
1620 | */ | |
1621 | void snd_soc_dapm_free(struct snd_soc_device *socdev) | |
1622 | { | |
1623 | struct snd_soc_codec *codec = socdev->codec; | |
1624 | ||
1625 | snd_soc_dapm_sys_remove(socdev->dev); | |
1626 | dapm_free_widgets(codec); | |
1627 | } | |
1628 | EXPORT_SYMBOL_GPL(snd_soc_dapm_free); | |
1629 | ||
1630 | /* Module information */ | |
d331124d | 1631 | MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk"); |
2b97eabc RP |
1632 | MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC"); |
1633 | MODULE_LICENSE("GPL"); |