2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
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
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <linux/debugfs.h>
41 #include <linux/slab.h>
42 #include <sound/core.h>
43 #include <sound/pcm.h>
44 #include <sound/pcm_params.h>
45 #include <sound/soc-dapm.h>
46 #include <sound/initval.h>
48 /* dapm power sequences - make this per codec in the future */
49 static int dapm_up_seq[] = {
50 [snd_soc_dapm_pre] = 0,
51 [snd_soc_dapm_supply] = 1,
52 [snd_soc_dapm_micbias] = 2,
53 [snd_soc_dapm_aif_in] = 3,
54 [snd_soc_dapm_aif_out] = 3,
55 [snd_soc_dapm_mic] = 4,
56 [snd_soc_dapm_mux] = 5,
57 [snd_soc_dapm_value_mux] = 5,
58 [snd_soc_dapm_dac] = 6,
59 [snd_soc_dapm_mixer] = 7,
60 [snd_soc_dapm_mixer_named_ctl] = 7,
61 [snd_soc_dapm_pga] = 8,
62 [snd_soc_dapm_adc] = 9,
63 [snd_soc_dapm_hp] = 10,
64 [snd_soc_dapm_spk] = 10,
65 [snd_soc_dapm_post] = 11,
68 static int dapm_down_seq[] = {
69 [snd_soc_dapm_pre] = 0,
70 [snd_soc_dapm_adc] = 1,
71 [snd_soc_dapm_hp] = 2,
72 [snd_soc_dapm_spk] = 2,
73 [snd_soc_dapm_pga] = 4,
74 [snd_soc_dapm_mixer_named_ctl] = 5,
75 [snd_soc_dapm_mixer] = 5,
76 [snd_soc_dapm_dac] = 6,
77 [snd_soc_dapm_mic] = 7,
78 [snd_soc_dapm_micbias] = 8,
79 [snd_soc_dapm_mux] = 9,
80 [snd_soc_dapm_value_mux] = 9,
81 [snd_soc_dapm_aif_in] = 10,
82 [snd_soc_dapm_aif_out] = 10,
83 [snd_soc_dapm_supply] = 11,
84 [snd_soc_dapm_post] = 12,
87 static void pop_wait(u32 pop_time)
90 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
93 static void pop_dbg(u32 pop_time, const char *fmt, ...)
106 /* create a new dapm widget */
107 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
108 const struct snd_soc_dapm_widget *_widget)
110 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
114 * snd_soc_dapm_set_bias_level - set the bias level for the system
115 * @card: audio device
116 * @level: level to configure
118 * Configure the bias (power) levels for the SoC audio device.
120 * Returns 0 for success else error.
122 static int snd_soc_dapm_set_bias_level(struct snd_soc_card *card,
123 struct snd_soc_codec *codec, enum snd_soc_bias_level level)
128 case SND_SOC_BIAS_ON:
129 dev_dbg(codec->dev, "Setting full bias\n");
131 case SND_SOC_BIAS_PREPARE:
132 dev_dbg(codec->dev, "Setting bias prepare\n");
134 case SND_SOC_BIAS_STANDBY:
135 dev_dbg(codec->dev, "Setting standby bias\n");
137 case SND_SOC_BIAS_OFF:
138 dev_dbg(codec->dev, "Setting bias off\n");
141 dev_err(codec->dev, "Setting invalid bias %d\n", level);
145 if (card && card->set_bias_level)
146 ret = card->set_bias_level(card, level);
148 if (codec->driver->set_bias_level)
149 ret = codec->driver->set_bias_level(codec, level);
151 codec->bias_level = level;
157 /* set up initial codec paths */
158 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
159 struct snd_soc_dapm_path *p, int i)
162 case snd_soc_dapm_switch:
163 case snd_soc_dapm_mixer:
164 case snd_soc_dapm_mixer_named_ctl: {
166 struct soc_mixer_control *mc = (struct soc_mixer_control *)
167 w->kcontrols[i].private_value;
168 unsigned int reg = mc->reg;
169 unsigned int shift = mc->shift;
171 unsigned int mask = (1 << fls(max)) - 1;
172 unsigned int invert = mc->invert;
174 val = snd_soc_read(w->codec, reg);
175 val = (val >> shift) & mask;
177 if ((invert && !val) || (!invert && val))
183 case snd_soc_dapm_mux: {
184 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
185 int val, item, bitmask;
187 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
189 val = snd_soc_read(w->codec, e->reg);
190 item = (val >> e->shift_l) & (bitmask - 1);
193 for (i = 0; i < e->max; i++) {
194 if (!(strcmp(p->name, e->texts[i])) && item == i)
199 case snd_soc_dapm_value_mux: {
200 struct soc_enum *e = (struct soc_enum *)
201 w->kcontrols[i].private_value;
204 val = snd_soc_read(w->codec, e->reg);
205 val = (val >> e->shift_l) & e->mask;
206 for (item = 0; item < e->max; item++) {
207 if (val == e->values[item])
212 for (i = 0; i < e->max; i++) {
213 if (!(strcmp(p->name, e->texts[i])) && item == i)
218 /* does not effect routing - always connected */
219 case snd_soc_dapm_pga:
220 case snd_soc_dapm_output:
221 case snd_soc_dapm_adc:
222 case snd_soc_dapm_input:
223 case snd_soc_dapm_dac:
224 case snd_soc_dapm_micbias:
225 case snd_soc_dapm_vmid:
226 case snd_soc_dapm_supply:
227 case snd_soc_dapm_aif_in:
228 case snd_soc_dapm_aif_out:
231 /* does effect routing - dynamically connected */
232 case snd_soc_dapm_hp:
233 case snd_soc_dapm_mic:
234 case snd_soc_dapm_spk:
235 case snd_soc_dapm_line:
236 case snd_soc_dapm_pre:
237 case snd_soc_dapm_post:
243 /* connect mux widget to its interconnecting audio paths */
244 static int dapm_connect_mux(struct snd_soc_codec *codec,
245 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
246 struct snd_soc_dapm_path *path, const char *control_name,
247 const struct snd_kcontrol_new *kcontrol)
249 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
252 for (i = 0; i < e->max; i++) {
253 if (!(strcmp(control_name, e->texts[i]))) {
254 list_add(&path->list, &codec->dapm_paths);
255 list_add(&path->list_sink, &dest->sources);
256 list_add(&path->list_source, &src->sinks);
257 path->name = (char*)e->texts[i];
258 dapm_set_path_status(dest, path, 0);
266 /* connect mixer widget to its interconnecting audio paths */
267 static int dapm_connect_mixer(struct snd_soc_codec *codec,
268 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
269 struct snd_soc_dapm_path *path, const char *control_name)
273 /* search for mixer kcontrol */
274 for (i = 0; i < dest->num_kcontrols; i++) {
275 if (!strcmp(control_name, dest->kcontrols[i].name)) {
276 list_add(&path->list, &codec->dapm_paths);
277 list_add(&path->list_sink, &dest->sources);
278 list_add(&path->list_source, &src->sinks);
279 path->name = dest->kcontrols[i].name;
280 dapm_set_path_status(dest, path, i);
287 /* update dapm codec register bits */
288 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
291 unsigned int old, new;
292 struct snd_soc_codec *codec = widget->codec;
294 /* check for valid widgets */
295 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
296 widget->id == snd_soc_dapm_output ||
297 widget->id == snd_soc_dapm_hp ||
298 widget->id == snd_soc_dapm_mic ||
299 widget->id == snd_soc_dapm_line ||
300 widget->id == snd_soc_dapm_spk)
303 power = widget->power;
305 power = (power ? 0:1);
307 old = snd_soc_read(codec, widget->reg);
308 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
312 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
313 widget->name, widget->power ? "on" : "off",
315 pop_wait(codec->pop_time);
316 snd_soc_write(codec, widget->reg, new);
318 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
323 /* create new dapm mixer control */
324 static int dapm_new_mixer(struct snd_soc_codec *codec,
325 struct snd_soc_dapm_widget *w)
329 struct snd_soc_dapm_path *path;
332 for (i = 0; i < w->num_kcontrols; i++) {
335 list_for_each_entry(path, &w->sources, list_sink) {
337 /* mixer/mux paths name must match control name */
338 if (path->name != (char*)w->kcontrols[i].name)
341 /* add dapm control with long name.
342 * for dapm_mixer this is the concatenation of the
343 * mixer and kcontrol name.
344 * for dapm_mixer_named_ctl this is simply the
347 name_len = strlen(w->kcontrols[i].name) + 1;
348 if (w->id != snd_soc_dapm_mixer_named_ctl)
349 name_len += 1 + strlen(w->name);
351 path->long_name = kmalloc(name_len, GFP_KERNEL);
353 if (path->long_name == NULL)
358 snprintf(path->long_name, name_len, "%s %s",
359 w->name, w->kcontrols[i].name);
361 case snd_soc_dapm_mixer_named_ctl:
362 snprintf(path->long_name, name_len, "%s",
363 w->kcontrols[i].name);
367 path->long_name[name_len - 1] = '\0';
369 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
371 ret = snd_ctl_add(codec->card->snd_card, path->kcontrol);
373 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s: %d\n",
376 kfree(path->long_name);
377 path->long_name = NULL;
385 /* create new dapm mux control */
386 static int dapm_new_mux(struct snd_soc_codec *codec,
387 struct snd_soc_dapm_widget *w)
389 struct snd_soc_dapm_path *path = NULL;
390 struct snd_kcontrol *kcontrol;
393 if (!w->num_kcontrols) {
394 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
398 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
399 ret = snd_ctl_add(codec->card->snd_card, kcontrol);
403 list_for_each_entry(path, &w->sources, list_sink)
404 path->kcontrol = kcontrol;
409 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
413 /* create new dapm volume control */
414 static int dapm_new_pga(struct snd_soc_codec *codec,
415 struct snd_soc_dapm_widget *w)
417 if (w->num_kcontrols)
418 pr_err("asoc: PGA controls not supported: '%s'\n", w->name);
423 /* reset 'walked' bit for each dapm path */
424 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
426 struct snd_soc_dapm_path *p;
428 list_for_each_entry(p, &codec->dapm_paths, list)
432 /* We implement power down on suspend by checking the power state of
433 * the ALSA card - when we are suspending the ALSA state for the card
436 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
438 int level = snd_power_get_state(widget->codec->card->snd_card);
441 case SNDRV_CTL_POWER_D3hot:
442 case SNDRV_CTL_POWER_D3cold:
443 if (widget->ignore_suspend)
444 pr_debug("%s ignoring suspend\n", widget->name);
445 return widget->ignore_suspend;
452 * Recursively check for a completed path to an active or physically connected
453 * output widget. Returns number of complete paths.
455 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
457 struct snd_soc_dapm_path *path;
460 if (widget->id == snd_soc_dapm_supply)
463 switch (widget->id) {
464 case snd_soc_dapm_adc:
465 case snd_soc_dapm_aif_out:
467 return snd_soc_dapm_suspend_check(widget);
472 if (widget->connected) {
473 /* connected pin ? */
474 if (widget->id == snd_soc_dapm_output && !widget->ext)
475 return snd_soc_dapm_suspend_check(widget);
477 /* connected jack or spk ? */
478 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
479 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
480 return snd_soc_dapm_suspend_check(widget);
483 list_for_each_entry(path, &widget->sinks, list_source) {
487 if (path->sink && path->connect) {
489 con += is_connected_output_ep(path->sink);
497 * Recursively check for a completed path to an active or physically connected
498 * input widget. Returns number of complete paths.
500 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
502 struct snd_soc_dapm_path *path;
505 if (widget->id == snd_soc_dapm_supply)
508 /* active stream ? */
509 switch (widget->id) {
510 case snd_soc_dapm_dac:
511 case snd_soc_dapm_aif_in:
513 return snd_soc_dapm_suspend_check(widget);
518 if (widget->connected) {
519 /* connected pin ? */
520 if (widget->id == snd_soc_dapm_input && !widget->ext)
521 return snd_soc_dapm_suspend_check(widget);
523 /* connected VMID/Bias for lower pops */
524 if (widget->id == snd_soc_dapm_vmid)
525 return snd_soc_dapm_suspend_check(widget);
527 /* connected jack ? */
528 if (widget->id == snd_soc_dapm_mic ||
529 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
530 return snd_soc_dapm_suspend_check(widget);
533 list_for_each_entry(path, &widget->sources, list_sink) {
537 if (path->source && path->connect) {
539 con += is_connected_input_ep(path->source);
547 * Handler for generic register modifier widget.
549 int dapm_reg_event(struct snd_soc_dapm_widget *w,
550 struct snd_kcontrol *kcontrol, int event)
554 if (SND_SOC_DAPM_EVENT_ON(event))
559 snd_soc_update_bits(w->codec, -(w->reg + 1),
560 w->mask << w->shift, val << w->shift);
564 EXPORT_SYMBOL_GPL(dapm_reg_event);
566 /* Standard power change method, used to apply power changes to most
569 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
573 /* call any power change event handlers */
575 pr_debug("power %s event for %s flags %x\n",
576 w->power ? "on" : "off",
577 w->name, w->event_flags);
579 /* power up pre event */
580 if (w->power && w->event &&
581 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
582 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
587 /* power down pre event */
588 if (!w->power && w->event &&
589 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
590 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
597 /* power up post event */
598 if (w->power && w->event &&
599 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
601 NULL, SND_SOC_DAPM_POST_PMU);
606 /* power down post event */
607 if (!w->power && w->event &&
608 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
609 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
617 /* Generic check to see if a widget should be powered.
619 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
623 in = is_connected_input_ep(w);
624 dapm_clear_walk(w->codec);
625 out = is_connected_output_ep(w);
626 dapm_clear_walk(w->codec);
627 return out != 0 && in != 0;
630 /* Check to see if an ADC has power */
631 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
636 in = is_connected_input_ep(w);
637 dapm_clear_walk(w->codec);
640 return dapm_generic_check_power(w);
644 /* Check to see if a DAC has power */
645 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
650 out = is_connected_output_ep(w);
651 dapm_clear_walk(w->codec);
654 return dapm_generic_check_power(w);
658 /* Check to see if a power supply is needed */
659 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
661 struct snd_soc_dapm_path *path;
664 /* Check if one of our outputs is connected */
665 list_for_each_entry(path, &w->sinks, list_source) {
666 if (path->connected &&
667 !path->connected(path->source, path->sink))
670 if (path->sink && path->sink->power_check &&
671 path->sink->power_check(path->sink)) {
677 dapm_clear_walk(w->codec);
682 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
683 struct snd_soc_dapm_widget *b,
686 if (a->codec != b->codec)
687 return (unsigned long)a - (unsigned long)b;
688 if (sort[a->id] != sort[b->id])
689 return sort[a->id] - sort[b->id];
690 if (a->reg != b->reg)
691 return a->reg - b->reg;
696 /* Insert a widget in order into a DAPM power sequence. */
697 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
698 struct list_head *list,
701 struct snd_soc_dapm_widget *w;
703 list_for_each_entry(w, list, power_list)
704 if (dapm_seq_compare(new_widget, w, sort) < 0) {
705 list_add_tail(&new_widget->power_list, &w->power_list);
709 list_add_tail(&new_widget->power_list, list);
712 /* Apply the coalesced changes from a DAPM sequence */
713 static void dapm_seq_run_coalesced(struct snd_soc_codec *codec,
714 struct list_head *pending)
716 struct snd_soc_dapm_widget *w;
718 unsigned int value = 0;
719 unsigned int mask = 0;
720 unsigned int cur_mask;
722 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
725 list_for_each_entry(w, pending, power_list) {
726 cur_mask = 1 << w->shift;
727 BUG_ON(reg != w->reg);
738 pop_dbg(codec->pop_time,
739 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
740 w->name, reg, value, mask);
742 /* power up pre event */
743 if (w->power && w->event &&
744 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
745 pop_dbg(codec->pop_time, "pop test : %s PRE_PMU\n",
747 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
749 pr_err("%s: pre event failed: %d\n",
753 /* power down pre event */
754 if (!w->power && w->event &&
755 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
756 pop_dbg(codec->pop_time, "pop test : %s PRE_PMD\n",
758 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
760 pr_err("%s: pre event failed: %d\n",
766 pop_dbg(codec->pop_time,
767 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
768 value, mask, reg, codec->pop_time);
769 pop_wait(codec->pop_time);
770 snd_soc_update_bits(codec, reg, mask, value);
773 list_for_each_entry(w, pending, power_list) {
774 /* power up post event */
775 if (w->power && w->event &&
776 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
777 pop_dbg(codec->pop_time, "pop test : %s POST_PMU\n",
780 NULL, SND_SOC_DAPM_POST_PMU);
782 pr_err("%s: post event failed: %d\n",
786 /* power down post event */
787 if (!w->power && w->event &&
788 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
789 pop_dbg(codec->pop_time, "pop test : %s POST_PMD\n",
791 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
793 pr_err("%s: post event failed: %d\n",
799 /* Apply a DAPM power sequence.
801 * We walk over a pre-sorted list of widgets to apply power to. In
802 * order to minimise the number of writes to the device required
803 * multiple widgets will be updated in a single write where possible.
804 * Currently anything that requires more than a single write is not
807 static void dapm_seq_run(struct snd_soc_codec *codec, struct list_head *list,
808 int event, int sort[])
810 struct snd_soc_dapm_widget *w, *n;
813 int cur_reg = SND_SOC_NOPM;
816 list_for_each_entry_safe(w, n, list, power_list) {
819 /* Do we need to apply any queued changes? */
820 if (sort[w->id] != cur_sort || w->reg != cur_reg) {
821 if (!list_empty(&pending))
822 dapm_seq_run_coalesced(codec, &pending);
824 INIT_LIST_HEAD(&pending);
826 cur_reg = SND_SOC_NOPM;
830 case snd_soc_dapm_pre:
832 list_for_each_entry_safe_continue(w, n, list,
835 if (event == SND_SOC_DAPM_STREAM_START)
837 NULL, SND_SOC_DAPM_PRE_PMU);
838 else if (event == SND_SOC_DAPM_STREAM_STOP)
840 NULL, SND_SOC_DAPM_PRE_PMD);
843 case snd_soc_dapm_post:
845 list_for_each_entry_safe_continue(w, n, list,
848 if (event == SND_SOC_DAPM_STREAM_START)
850 NULL, SND_SOC_DAPM_POST_PMU);
851 else if (event == SND_SOC_DAPM_STREAM_STOP)
853 NULL, SND_SOC_DAPM_POST_PMD);
856 case snd_soc_dapm_input:
857 case snd_soc_dapm_output:
858 case snd_soc_dapm_hp:
859 case snd_soc_dapm_mic:
860 case snd_soc_dapm_line:
861 case snd_soc_dapm_spk:
862 /* No register support currently */
863 ret = dapm_generic_apply_power(w);
867 /* Queue it up for application */
868 cur_sort = sort[w->id];
870 list_move(&w->power_list, &pending);
875 pr_err("Failed to apply widget power: %d\n",
879 if (!list_empty(&pending))
880 dapm_seq_run_coalesced(codec, &pending);
884 * Scan each dapm widget for complete audio path.
885 * A complete path is a route that has valid endpoints i.e.:-
887 * o DAC to output pin.
888 * o Input Pin to ADC.
889 * o Input pin to Output pin (bypass, sidetone)
890 * o DAC to ADC (loopback).
892 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
894 struct snd_soc_card *card = codec->card;
895 struct snd_soc_dapm_widget *w;
897 LIST_HEAD(down_list);
902 /* Check which widgets we need to power and store them in
903 * lists indicating if they should be powered up or down.
905 list_for_each_entry(w, &codec->dapm_widgets, list) {
907 case snd_soc_dapm_pre:
908 dapm_seq_insert(w, &down_list, dapm_down_seq);
910 case snd_soc_dapm_post:
911 dapm_seq_insert(w, &up_list, dapm_up_seq);
919 power = w->power_check(w);
925 if (w->power == power)
929 dapm_seq_insert(w, &up_list, dapm_up_seq);
931 dapm_seq_insert(w, &down_list, dapm_down_seq);
938 /* If there are no DAPM widgets then try to figure out power from the
941 if (list_empty(&codec->dapm_widgets)) {
943 case SND_SOC_DAPM_STREAM_START:
944 case SND_SOC_DAPM_STREAM_RESUME:
947 case SND_SOC_DAPM_STREAM_SUSPEND:
950 case SND_SOC_DAPM_STREAM_NOP:
951 switch (codec->bias_level) {
952 case SND_SOC_BIAS_STANDBY:
953 case SND_SOC_BIAS_OFF:
966 if (sys_power && codec->bias_level == SND_SOC_BIAS_OFF) {
967 ret = snd_soc_dapm_set_bias_level(card, codec,
968 SND_SOC_BIAS_STANDBY);
970 pr_err("Failed to turn on bias: %d\n", ret);
973 /* If we're changing to all on or all off then prepare */
974 if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
975 (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {
976 ret = snd_soc_dapm_set_bias_level(card, codec, SND_SOC_BIAS_PREPARE);
978 pr_err("Failed to prepare bias: %d\n", ret);
981 /* Power down widgets first; try to avoid amplifying pops. */
982 dapm_seq_run(codec, &down_list, event, dapm_down_seq);
985 dapm_seq_run(codec, &up_list, event, dapm_up_seq);
987 /* If we just powered the last thing off drop to standby bias */
988 if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
989 ret = snd_soc_dapm_set_bias_level(card, codec, SND_SOC_BIAS_STANDBY);
991 pr_err("Failed to apply standby bias: %d\n", ret);
994 /* If we're in standby and can support bias off then do that */
995 if (codec->bias_level == SND_SOC_BIAS_STANDBY &&
996 codec->idle_bias_off) {
997 ret = snd_soc_dapm_set_bias_level(card, codec, SND_SOC_BIAS_OFF);
999 pr_err("Failed to turn off bias: %d\n", ret);
1002 /* If we just powered up then move to active bias */
1003 if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
1004 ret = snd_soc_dapm_set_bias_level(card, codec, SND_SOC_BIAS_ON);
1006 pr_err("Failed to apply active bias: %d\n", ret);
1009 pop_dbg(codec->pop_time, "DAPM sequencing finished, waiting %dms\n",
1011 pop_wait(codec->pop_time);
1016 #ifdef CONFIG_DEBUG_FS
1017 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1019 file->private_data = inode->i_private;
1023 static ssize_t dapm_widget_power_read_file(struct file *file,
1024 char __user *user_buf,
1025 size_t count, loff_t *ppos)
1027 struct snd_soc_dapm_widget *w = file->private_data;
1031 struct snd_soc_dapm_path *p = NULL;
1033 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1037 in = is_connected_input_ep(w);
1038 dapm_clear_walk(w->codec);
1039 out = is_connected_output_ep(w);
1040 dapm_clear_walk(w->codec);
1042 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1043 w->name, w->power ? "On" : "Off", in, out);
1046 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1047 " - R%d(0x%x) bit %d",
1048 w->reg, w->reg, w->shift);
1050 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1053 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1055 w->active ? "active" : "inactive");
1057 list_for_each_entry(p, &w->sources, list_sink) {
1058 if (p->connected && !p->connected(w, p->sink))
1062 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1064 p->name ? p->name : "static",
1067 list_for_each_entry(p, &w->sinks, list_source) {
1068 if (p->connected && !p->connected(w, p->sink))
1072 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1074 p->name ? p->name : "static",
1078 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1084 static const struct file_operations dapm_widget_power_fops = {
1085 .open = dapm_widget_power_open_file,
1086 .read = dapm_widget_power_read_file,
1089 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1091 struct snd_soc_dapm_widget *w;
1094 if (!codec->debugfs_dapm)
1097 list_for_each_entry(w, &codec->dapm_widgets, list) {
1101 d = debugfs_create_file(w->name, 0444,
1102 codec->debugfs_dapm, w,
1103 &dapm_widget_power_fops);
1106 "ASoC: Failed to create %s debugfs file\n",
1111 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1116 /* test and update the power status of a mux widget */
1117 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1118 struct snd_kcontrol *kcontrol, int change,
1119 int mux, struct soc_enum *e)
1121 struct snd_soc_dapm_path *path;
1124 if (widget->id != snd_soc_dapm_mux &&
1125 widget->id != snd_soc_dapm_value_mux)
1131 /* find dapm widget path assoc with kcontrol */
1132 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1133 if (path->kcontrol != kcontrol)
1136 if (!path->name || !e->texts[mux])
1140 /* we now need to match the string in the enum to the path */
1141 if (!(strcmp(path->name, e->texts[mux])))
1142 path->connect = 1; /* new connection */
1144 path->connect = 0; /* old connection must be powered down */
1148 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1153 /* test and update the power status of a mixer or switch widget */
1154 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1155 struct snd_kcontrol *kcontrol, int connect)
1157 struct snd_soc_dapm_path *path;
1160 if (widget->id != snd_soc_dapm_mixer &&
1161 widget->id != snd_soc_dapm_mixer_named_ctl &&
1162 widget->id != snd_soc_dapm_switch)
1165 /* find dapm widget path assoc with kcontrol */
1166 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1167 if (path->kcontrol != kcontrol)
1170 /* found, now check type */
1172 path->connect = connect;
1177 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1182 /* show dapm widget status in sys fs */
1183 static ssize_t dapm_widget_show(struct device *dev,
1184 struct device_attribute *attr, char *buf)
1186 struct snd_soc_pcm_runtime *rtd =
1187 container_of(dev, struct snd_soc_pcm_runtime, dev);
1188 struct snd_soc_codec *codec =rtd->codec;
1189 struct snd_soc_dapm_widget *w;
1191 char *state = "not set";
1193 list_for_each_entry(w, &codec->dapm_widgets, list) {
1195 /* only display widgets that burnm power */
1197 case snd_soc_dapm_hp:
1198 case snd_soc_dapm_mic:
1199 case snd_soc_dapm_spk:
1200 case snd_soc_dapm_line:
1201 case snd_soc_dapm_micbias:
1202 case snd_soc_dapm_dac:
1203 case snd_soc_dapm_adc:
1204 case snd_soc_dapm_pga:
1205 case snd_soc_dapm_mixer:
1206 case snd_soc_dapm_mixer_named_ctl:
1207 case snd_soc_dapm_supply:
1209 count += sprintf(buf + count, "%s: %s\n",
1210 w->name, w->power ? "On":"Off");
1217 switch (codec->bias_level) {
1218 case SND_SOC_BIAS_ON:
1221 case SND_SOC_BIAS_PREPARE:
1224 case SND_SOC_BIAS_STANDBY:
1227 case SND_SOC_BIAS_OFF:
1231 count += sprintf(buf + count, "PM State: %s\n", state);
1236 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1238 int snd_soc_dapm_sys_add(struct device *dev)
1240 return device_create_file(dev, &dev_attr_dapm_widget);
1243 static void snd_soc_dapm_sys_remove(struct device *dev)
1245 device_remove_file(dev, &dev_attr_dapm_widget);
1248 /* free all dapm widgets and resources */
1249 static void dapm_free_widgets(struct snd_soc_codec *codec)
1251 struct snd_soc_dapm_widget *w, *next_w;
1252 struct snd_soc_dapm_path *p, *next_p;
1254 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
1259 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
1261 kfree(p->long_name);
1266 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
1267 const char *pin, int status)
1269 struct snd_soc_dapm_widget *w;
1271 list_for_each_entry(w, &codec->dapm_widgets, list) {
1272 if (!strcmp(w->name, pin)) {
1273 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
1274 w->connected = status;
1275 /* Allow disabling of forced pins */
1282 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
1287 * snd_soc_dapm_sync - scan and power dapm paths
1288 * @codec: audio codec
1290 * Walks all dapm audio paths and powers widgets according to their
1291 * stream or path usage.
1293 * Returns 0 for success.
1295 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
1297 return dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1299 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1301 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
1302 const struct snd_soc_dapm_route *route)
1304 struct snd_soc_dapm_path *path;
1305 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1306 const char *sink = route->sink;
1307 const char *control = route->control;
1308 const char *source = route->source;
1311 /* find src and dest widgets */
1312 list_for_each_entry(w, &codec->dapm_widgets, list) {
1314 if (!wsink && !(strcmp(w->name, sink))) {
1318 if (!wsource && !(strcmp(w->name, source))) {
1323 if (wsource == NULL || wsink == NULL)
1326 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1330 path->source = wsource;
1332 path->connected = route->connected;
1333 INIT_LIST_HEAD(&path->list);
1334 INIT_LIST_HEAD(&path->list_source);
1335 INIT_LIST_HEAD(&path->list_sink);
1337 /* check for external widgets */
1338 if (wsink->id == snd_soc_dapm_input) {
1339 if (wsource->id == snd_soc_dapm_micbias ||
1340 wsource->id == snd_soc_dapm_mic ||
1341 wsource->id == snd_soc_dapm_line ||
1342 wsource->id == snd_soc_dapm_output)
1345 if (wsource->id == snd_soc_dapm_output) {
1346 if (wsink->id == snd_soc_dapm_spk ||
1347 wsink->id == snd_soc_dapm_hp ||
1348 wsink->id == snd_soc_dapm_line ||
1349 wsink->id == snd_soc_dapm_input)
1353 /* connect static paths */
1354 if (control == NULL) {
1355 list_add(&path->list, &codec->dapm_paths);
1356 list_add(&path->list_sink, &wsink->sources);
1357 list_add(&path->list_source, &wsource->sinks);
1362 /* connect dynamic paths */
1364 case snd_soc_dapm_adc:
1365 case snd_soc_dapm_dac:
1366 case snd_soc_dapm_pga:
1367 case snd_soc_dapm_input:
1368 case snd_soc_dapm_output:
1369 case snd_soc_dapm_micbias:
1370 case snd_soc_dapm_vmid:
1371 case snd_soc_dapm_pre:
1372 case snd_soc_dapm_post:
1373 case snd_soc_dapm_supply:
1374 case snd_soc_dapm_aif_in:
1375 case snd_soc_dapm_aif_out:
1376 list_add(&path->list, &codec->dapm_paths);
1377 list_add(&path->list_sink, &wsink->sources);
1378 list_add(&path->list_source, &wsource->sinks);
1381 case snd_soc_dapm_mux:
1382 case snd_soc_dapm_value_mux:
1383 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1384 &wsink->kcontrols[0]);
1388 case snd_soc_dapm_switch:
1389 case snd_soc_dapm_mixer:
1390 case snd_soc_dapm_mixer_named_ctl:
1391 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1395 case snd_soc_dapm_hp:
1396 case snd_soc_dapm_mic:
1397 case snd_soc_dapm_line:
1398 case snd_soc_dapm_spk:
1399 list_add(&path->list, &codec->dapm_paths);
1400 list_add(&path->list_sink, &wsink->sources);
1401 list_add(&path->list_source, &wsource->sinks);
1408 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1415 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1417 * @route: audio routes
1418 * @num: number of routes
1420 * Connects 2 dapm widgets together via a named audio path. The sink is
1421 * the widget receiving the audio signal, whilst the source is the sender
1422 * of the audio signal.
1424 * Returns 0 for success else error. On error all resources can be freed
1425 * with a call to snd_soc_card_free().
1427 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1428 const struct snd_soc_dapm_route *route, int num)
1432 for (i = 0; i < num; i++) {
1433 ret = snd_soc_dapm_add_route(codec, route);
1435 printk(KERN_ERR "Failed to add route %s->%s\n",
1445 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1448 * snd_soc_dapm_new_widgets - add new dapm widgets
1449 * @codec: audio codec
1451 * Checks the codec for any new dapm widgets and creates them if found.
1453 * Returns 0 for success.
1455 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1457 struct snd_soc_dapm_widget *w;
1459 list_for_each_entry(w, &codec->dapm_widgets, list)
1465 case snd_soc_dapm_switch:
1466 case snd_soc_dapm_mixer:
1467 case snd_soc_dapm_mixer_named_ctl:
1468 w->power_check = dapm_generic_check_power;
1469 dapm_new_mixer(codec, w);
1471 case snd_soc_dapm_mux:
1472 case snd_soc_dapm_value_mux:
1473 w->power_check = dapm_generic_check_power;
1474 dapm_new_mux(codec, w);
1476 case snd_soc_dapm_adc:
1477 case snd_soc_dapm_aif_out:
1478 w->power_check = dapm_adc_check_power;
1480 case snd_soc_dapm_dac:
1481 case snd_soc_dapm_aif_in:
1482 w->power_check = dapm_dac_check_power;
1484 case snd_soc_dapm_pga:
1485 w->power_check = dapm_generic_check_power;
1486 dapm_new_pga(codec, w);
1488 case snd_soc_dapm_input:
1489 case snd_soc_dapm_output:
1490 case snd_soc_dapm_micbias:
1491 case snd_soc_dapm_spk:
1492 case snd_soc_dapm_hp:
1493 case snd_soc_dapm_mic:
1494 case snd_soc_dapm_line:
1495 w->power_check = dapm_generic_check_power;
1497 case snd_soc_dapm_supply:
1498 w->power_check = dapm_supply_check_power;
1499 case snd_soc_dapm_vmid:
1500 case snd_soc_dapm_pre:
1501 case snd_soc_dapm_post:
1507 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1510 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1513 * snd_soc_dapm_get_volsw - dapm mixer get callback
1514 * @kcontrol: mixer control
1515 * @ucontrol: control element information
1517 * Callback to get the value of a dapm mixer control.
1519 * Returns 0 for success.
1521 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1522 struct snd_ctl_elem_value *ucontrol)
1524 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1525 struct soc_mixer_control *mc =
1526 (struct soc_mixer_control *)kcontrol->private_value;
1527 unsigned int reg = mc->reg;
1528 unsigned int shift = mc->shift;
1529 unsigned int rshift = mc->rshift;
1531 unsigned int invert = mc->invert;
1532 unsigned int mask = (1 << fls(max)) - 1;
1534 ucontrol->value.integer.value[0] =
1535 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1536 if (shift != rshift)
1537 ucontrol->value.integer.value[1] =
1538 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1540 ucontrol->value.integer.value[0] =
1541 max - ucontrol->value.integer.value[0];
1542 if (shift != rshift)
1543 ucontrol->value.integer.value[1] =
1544 max - ucontrol->value.integer.value[1];
1549 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1552 * snd_soc_dapm_put_volsw - dapm mixer set callback
1553 * @kcontrol: mixer control
1554 * @ucontrol: control element information
1556 * Callback to set the value of a dapm mixer control.
1558 * Returns 0 for success.
1560 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1561 struct snd_ctl_elem_value *ucontrol)
1563 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1564 struct soc_mixer_control *mc =
1565 (struct soc_mixer_control *)kcontrol->private_value;
1566 unsigned int reg = mc->reg;
1567 unsigned int shift = mc->shift;
1568 unsigned int rshift = mc->rshift;
1570 unsigned int mask = (1 << fls(max)) - 1;
1571 unsigned int invert = mc->invert;
1572 unsigned int val, val2, val_mask;
1576 val = (ucontrol->value.integer.value[0] & mask);
1580 val_mask = mask << shift;
1582 if (shift != rshift) {
1583 val2 = (ucontrol->value.integer.value[1] & mask);
1586 val_mask |= mask << rshift;
1587 val |= val2 << rshift;
1590 mutex_lock(&widget->codec->mutex);
1591 widget->value = val;
1593 if (snd_soc_test_bits(widget->codec, reg, val_mask, val)) {
1595 /* new connection */
1596 connect = invert ? 0:1;
1598 /* old connection must be powered down */
1599 connect = invert ? 1:0;
1601 dapm_mixer_update_power(widget, kcontrol, connect);
1604 if (widget->event) {
1605 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1606 ret = widget->event(widget, kcontrol,
1607 SND_SOC_DAPM_PRE_REG);
1613 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1614 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1615 ret = widget->event(widget, kcontrol,
1616 SND_SOC_DAPM_POST_REG);
1618 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1621 mutex_unlock(&widget->codec->mutex);
1624 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1627 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1628 * @kcontrol: mixer control
1629 * @ucontrol: control element information
1631 * Callback to get the value of a dapm enumerated double mixer control.
1633 * Returns 0 for success.
1635 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1636 struct snd_ctl_elem_value *ucontrol)
1638 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1639 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1640 unsigned int val, bitmask;
1642 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1644 val = snd_soc_read(widget->codec, e->reg);
1645 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1646 if (e->shift_l != e->shift_r)
1647 ucontrol->value.enumerated.item[1] =
1648 (val >> e->shift_r) & (bitmask - 1);
1652 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1655 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1656 * @kcontrol: mixer control
1657 * @ucontrol: control element information
1659 * Callback to set the value of a dapm enumerated double mixer control.
1661 * Returns 0 for success.
1663 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1664 struct snd_ctl_elem_value *ucontrol)
1666 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1667 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1668 unsigned int val, mux, change;
1669 unsigned int mask, bitmask;
1672 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1674 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1676 mux = ucontrol->value.enumerated.item[0];
1677 val = mux << e->shift_l;
1678 mask = (bitmask - 1) << e->shift_l;
1679 if (e->shift_l != e->shift_r) {
1680 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1682 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1683 mask |= (bitmask - 1) << e->shift_r;
1686 mutex_lock(&widget->codec->mutex);
1687 widget->value = val;
1688 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1689 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1691 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1692 ret = widget->event(widget,
1693 kcontrol, SND_SOC_DAPM_PRE_REG);
1698 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1700 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1701 ret = widget->event(widget,
1702 kcontrol, SND_SOC_DAPM_POST_REG);
1705 mutex_unlock(&widget->codec->mutex);
1708 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1711 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1712 * @kcontrol: mixer control
1713 * @ucontrol: control element information
1715 * Returns 0 for success.
1717 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
1718 struct snd_ctl_elem_value *ucontrol)
1720 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1722 ucontrol->value.enumerated.item[0] = widget->value;
1726 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
1729 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1730 * @kcontrol: mixer control
1731 * @ucontrol: control element information
1733 * Returns 0 for success.
1735 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
1736 struct snd_ctl_elem_value *ucontrol)
1738 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1739 struct soc_enum *e =
1740 (struct soc_enum *)kcontrol->private_value;
1744 if (ucontrol->value.enumerated.item[0] >= e->max)
1747 mutex_lock(&widget->codec->mutex);
1749 change = widget->value != ucontrol->value.enumerated.item[0];
1750 widget->value = ucontrol->value.enumerated.item[0];
1751 dapm_mux_update_power(widget, kcontrol, change, widget->value, e);
1753 mutex_unlock(&widget->codec->mutex);
1756 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
1759 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1761 * @kcontrol: mixer control
1762 * @ucontrol: control element information
1764 * Callback to get the value of a dapm semi enumerated double mixer control.
1766 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1767 * used for handling bitfield coded enumeration for example.
1769 * Returns 0 for success.
1771 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1772 struct snd_ctl_elem_value *ucontrol)
1774 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1775 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1776 unsigned int reg_val, val, mux;
1778 reg_val = snd_soc_read(widget->codec, e->reg);
1779 val = (reg_val >> e->shift_l) & e->mask;
1780 for (mux = 0; mux < e->max; mux++) {
1781 if (val == e->values[mux])
1784 ucontrol->value.enumerated.item[0] = mux;
1785 if (e->shift_l != e->shift_r) {
1786 val = (reg_val >> e->shift_r) & e->mask;
1787 for (mux = 0; mux < e->max; mux++) {
1788 if (val == e->values[mux])
1791 ucontrol->value.enumerated.item[1] = mux;
1796 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1799 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1801 * @kcontrol: mixer control
1802 * @ucontrol: control element information
1804 * Callback to set the value of a dapm semi enumerated double mixer control.
1806 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1807 * used for handling bitfield coded enumeration for example.
1809 * Returns 0 for success.
1811 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1812 struct snd_ctl_elem_value *ucontrol)
1814 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1815 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1816 unsigned int val, mux, change;
1820 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1822 mux = ucontrol->value.enumerated.item[0];
1823 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1824 mask = e->mask << e->shift_l;
1825 if (e->shift_l != e->shift_r) {
1826 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1828 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1829 mask |= e->mask << e->shift_r;
1832 mutex_lock(&widget->codec->mutex);
1833 widget->value = val;
1834 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1835 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1837 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1838 ret = widget->event(widget,
1839 kcontrol, SND_SOC_DAPM_PRE_REG);
1844 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1846 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1847 ret = widget->event(widget,
1848 kcontrol, SND_SOC_DAPM_POST_REG);
1851 mutex_unlock(&widget->codec->mutex);
1854 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1857 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1859 * @kcontrol: mixer control
1860 * @uinfo: control element information
1862 * Callback to provide information about a pin switch control.
1864 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1865 struct snd_ctl_elem_info *uinfo)
1867 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1869 uinfo->value.integer.min = 0;
1870 uinfo->value.integer.max = 1;
1874 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1877 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1879 * @kcontrol: mixer control
1882 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1883 struct snd_ctl_elem_value *ucontrol)
1885 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1886 const char *pin = (const char *)kcontrol->private_value;
1888 mutex_lock(&codec->mutex);
1890 ucontrol->value.integer.value[0] =
1891 snd_soc_dapm_get_pin_status(codec, pin);
1893 mutex_unlock(&codec->mutex);
1897 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1900 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1902 * @kcontrol: mixer control
1905 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
1906 struct snd_ctl_elem_value *ucontrol)
1908 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1909 const char *pin = (const char *)kcontrol->private_value;
1911 mutex_lock(&codec->mutex);
1913 if (ucontrol->value.integer.value[0])
1914 snd_soc_dapm_enable_pin(codec, pin);
1916 snd_soc_dapm_disable_pin(codec, pin);
1918 snd_soc_dapm_sync(codec);
1920 mutex_unlock(&codec->mutex);
1924 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
1927 * snd_soc_dapm_new_control - create new dapm control
1928 * @codec: audio codec
1929 * @widget: widget template
1931 * Creates a new dapm control based upon the template.
1933 * Returns 0 for success else error.
1935 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1936 const struct snd_soc_dapm_widget *widget)
1938 struct snd_soc_dapm_widget *w;
1940 if ((w = dapm_cnew_widget(widget)) == NULL)
1944 INIT_LIST_HEAD(&w->sources);
1945 INIT_LIST_HEAD(&w->sinks);
1946 INIT_LIST_HEAD(&w->list);
1947 list_add(&w->list, &codec->dapm_widgets);
1949 /* machine layer set ups unconnected pins and insertions */
1953 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1956 * snd_soc_dapm_new_controls - create new dapm controls
1957 * @codec: audio codec
1958 * @widget: widget array
1959 * @num: number of widgets
1961 * Creates new DAPM controls based upon the templates.
1963 * Returns 0 for success else error.
1965 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1966 const struct snd_soc_dapm_widget *widget,
1971 for (i = 0; i < num; i++) {
1972 ret = snd_soc_dapm_new_control(codec, widget);
1975 "ASoC: Failed to create DAPM control %s: %d\n",
1983 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1987 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1988 * @codec: audio codec
1989 * @stream: stream name
1990 * @event: stream event
1992 * Sends a stream event to the dapm core. The core then makes any
1993 * necessary widget power changes.
1995 * Returns 0 for success else error.
1997 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
1998 const char *stream, int event)
2000 struct snd_soc_codec *codec = rtd->codec;
2001 struct snd_soc_dapm_widget *w;
2006 mutex_lock(&codec->mutex);
2007 list_for_each_entry(w, &codec->dapm_widgets, list)
2011 pr_debug("widget %s\n %s stream %s event %d\n",
2012 w->name, w->sname, stream, event);
2013 if (strstr(w->sname, stream)) {
2015 case SND_SOC_DAPM_STREAM_START:
2018 case SND_SOC_DAPM_STREAM_STOP:
2021 case SND_SOC_DAPM_STREAM_SUSPEND:
2022 case SND_SOC_DAPM_STREAM_RESUME:
2023 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2024 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2030 dapm_power_widgets(codec, event);
2031 mutex_unlock(&codec->mutex);
2034 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2037 * snd_soc_dapm_enable_pin - enable pin.
2041 * Enables input/output pin and its parents or children widgets iff there is
2042 * a valid audio route and active audio stream.
2043 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2044 * do any widget power switching.
2046 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
2048 return snd_soc_dapm_set_pin(codec, pin, 1);
2050 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2053 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2057 * Enables input/output pin regardless of any other state. This is
2058 * intended for use with microphone bias supplies used in microphone
2061 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2062 * do any widget power switching.
2064 int snd_soc_dapm_force_enable_pin(struct snd_soc_codec *codec, const char *pin)
2066 struct snd_soc_dapm_widget *w;
2068 list_for_each_entry(w, &codec->dapm_widgets, list) {
2069 if (!strcmp(w->name, pin)) {
2070 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
2077 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
2080 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2083 * snd_soc_dapm_disable_pin - disable pin.
2087 * Disables input/output pin and its parents or children widgets.
2088 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2089 * do any widget power switching.
2091 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
2093 return snd_soc_dapm_set_pin(codec, pin, 0);
2095 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2098 * snd_soc_dapm_nc_pin - permanently disable pin.
2102 * Marks the specified pin as being not connected, disabling it along
2103 * any parent or child widgets. At present this is identical to
2104 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2105 * additional things such as disabling controls which only affect
2106 * paths through the pin.
2108 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2109 * do any widget power switching.
2111 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
2113 return snd_soc_dapm_set_pin(codec, pin, 0);
2115 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2118 * snd_soc_dapm_get_pin_status - get audio pin status
2119 * @codec: audio codec
2120 * @pin: audio signal pin endpoint (or start point)
2122 * Get audio pin status - connected or disconnected.
2124 * Returns 1 for connected otherwise 0.
2126 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
2128 struct snd_soc_dapm_widget *w;
2130 list_for_each_entry(w, &codec->dapm_widgets, list) {
2131 if (!strcmp(w->name, pin))
2132 return w->connected;
2137 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2140 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2141 * @codec: audio codec
2142 * @pin: audio signal pin endpoint (or start point)
2144 * Mark the given endpoint or pin as ignoring suspend. When the
2145 * system is disabled a path between two endpoints flagged as ignoring
2146 * suspend will not be disabled. The path must already be enabled via
2147 * normal means at suspend time, it will not be turned on if it was not
2150 int snd_soc_dapm_ignore_suspend(struct snd_soc_codec *codec, const char *pin)
2152 struct snd_soc_dapm_widget *w;
2154 list_for_each_entry(w, &codec->dapm_widgets, list) {
2155 if (!strcmp(w->name, pin)) {
2156 w->ignore_suspend = 1;
2161 pr_err("Unknown DAPM pin: %s\n", pin);
2164 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2167 * snd_soc_dapm_free - free dapm resources
2170 * Free all dapm widgets and resources.
2172 void snd_soc_dapm_free(struct snd_soc_codec *codec)
2174 snd_soc_dapm_sys_remove(codec->dev);
2175 dapm_free_widgets(codec);
2177 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2179 static void soc_dapm_shutdown_codec(struct snd_soc_codec *codec)
2181 struct snd_soc_dapm_widget *w;
2182 LIST_HEAD(down_list);
2185 list_for_each_entry(w, &codec->dapm_widgets, list) {
2187 dapm_seq_insert(w, &down_list, dapm_down_seq);
2193 /* If there were no widgets to power down we're already in
2197 snd_soc_dapm_set_bias_level(NULL, codec, SND_SOC_BIAS_PREPARE);
2198 dapm_seq_run(codec, &down_list, 0, dapm_down_seq);
2199 snd_soc_dapm_set_bias_level(NULL, codec, SND_SOC_BIAS_STANDBY);
2204 * snd_soc_dapm_shutdown - callback for system shutdown
2206 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2208 struct snd_soc_codec *codec;
2210 list_for_each_entry(codec, &card->codec_dev_list, list)
2211 soc_dapm_shutdown_codec(codec);
2213 snd_soc_dapm_set_bias_level(card, codec, SND_SOC_BIAS_OFF);
2216 /* Module information */
2217 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2218 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2219 MODULE_LICENSE("GPL");