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 <sound/core.h>
42 #include <sound/pcm.h>
43 #include <sound/pcm_params.h>
44 #include <sound/soc-dapm.h>
45 #include <sound/initval.h>
47 /* dapm power sequences - make this per codec in the future */
48 static int dapm_up_seq[] = {
49 [snd_soc_dapm_pre] = 0,
50 [snd_soc_dapm_supply] = 1,
51 [snd_soc_dapm_micbias] = 2,
52 [snd_soc_dapm_aif_in] = 3,
53 [snd_soc_dapm_aif_out] = 3,
54 [snd_soc_dapm_mic] = 4,
55 [snd_soc_dapm_mux] = 5,
56 [snd_soc_dapm_value_mux] = 5,
57 [snd_soc_dapm_dac] = 6,
58 [snd_soc_dapm_mixer] = 7,
59 [snd_soc_dapm_mixer_named_ctl] = 7,
60 [snd_soc_dapm_pga] = 8,
61 [snd_soc_dapm_adc] = 9,
62 [snd_soc_dapm_hp] = 10,
63 [snd_soc_dapm_spk] = 10,
64 [snd_soc_dapm_post] = 11,
67 static int dapm_down_seq[] = {
68 [snd_soc_dapm_pre] = 0,
69 [snd_soc_dapm_adc] = 1,
70 [snd_soc_dapm_hp] = 2,
71 [snd_soc_dapm_spk] = 2,
72 [snd_soc_dapm_pga] = 4,
73 [snd_soc_dapm_mixer_named_ctl] = 5,
74 [snd_soc_dapm_mixer] = 5,
75 [snd_soc_dapm_dac] = 6,
76 [snd_soc_dapm_mic] = 7,
77 [snd_soc_dapm_micbias] = 8,
78 [snd_soc_dapm_mux] = 9,
79 [snd_soc_dapm_value_mux] = 9,
80 [snd_soc_dapm_aif_in] = 10,
81 [snd_soc_dapm_aif_out] = 10,
82 [snd_soc_dapm_supply] = 11,
83 [snd_soc_dapm_post] = 12,
86 static void pop_wait(u32 pop_time)
89 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
92 static void pop_dbg(u32 pop_time, const char *fmt, ...)
105 /* create a new dapm widget */
106 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
107 const struct snd_soc_dapm_widget *_widget)
109 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
113 * snd_soc_dapm_set_bias_level - set the bias level for the system
114 * @socdev: audio device
115 * @level: level to configure
117 * Configure the bias (power) levels for the SoC audio device.
119 * Returns 0 for success else error.
121 static int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
122 enum snd_soc_bias_level level)
124 struct snd_soc_card *card = socdev->card;
125 struct snd_soc_codec *codec = socdev->card->codec;
129 case SND_SOC_BIAS_ON:
130 dev_dbg(socdev->dev, "Setting full bias\n");
132 case SND_SOC_BIAS_PREPARE:
133 dev_dbg(socdev->dev, "Setting bias prepare\n");
135 case SND_SOC_BIAS_STANDBY:
136 dev_dbg(socdev->dev, "Setting standby bias\n");
138 case SND_SOC_BIAS_OFF:
139 dev_dbg(socdev->dev, "Setting bias off\n");
142 dev_err(socdev->dev, "Setting invalid bias %d\n", level);
146 if (card->set_bias_level)
147 ret = card->set_bias_level(card, level);
149 if (codec->set_bias_level)
150 ret = codec->set_bias_level(codec, level);
152 codec->bias_level = level;
158 /* set up initial codec paths */
159 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
160 struct snd_soc_dapm_path *p, int i)
163 case snd_soc_dapm_switch:
164 case snd_soc_dapm_mixer:
165 case snd_soc_dapm_mixer_named_ctl: {
167 struct soc_mixer_control *mc = (struct soc_mixer_control *)
168 w->kcontrols[i].private_value;
169 unsigned int reg = mc->reg;
170 unsigned int shift = mc->shift;
172 unsigned int mask = (1 << fls(max)) - 1;
173 unsigned int invert = mc->invert;
175 val = snd_soc_read(w->codec, reg);
176 val = (val >> shift) & mask;
178 if ((invert && !val) || (!invert && val))
184 case snd_soc_dapm_mux: {
185 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
186 int val, item, bitmask;
188 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
190 val = snd_soc_read(w->codec, e->reg);
191 item = (val >> e->shift_l) & (bitmask - 1);
194 for (i = 0; i < e->max; i++) {
195 if (!(strcmp(p->name, e->texts[i])) && item == i)
200 case snd_soc_dapm_value_mux: {
201 struct soc_enum *e = (struct soc_enum *)
202 w->kcontrols[i].private_value;
205 val = snd_soc_read(w->codec, e->reg);
206 val = (val >> e->shift_l) & e->mask;
207 for (item = 0; item < e->max; item++) {
208 if (val == e->values[item])
213 for (i = 0; i < e->max; i++) {
214 if (!(strcmp(p->name, e->texts[i])) && item == i)
219 /* does not effect routing - always connected */
220 case snd_soc_dapm_pga:
221 case snd_soc_dapm_output:
222 case snd_soc_dapm_adc:
223 case snd_soc_dapm_input:
224 case snd_soc_dapm_dac:
225 case snd_soc_dapm_micbias:
226 case snd_soc_dapm_vmid:
227 case snd_soc_dapm_supply:
228 case snd_soc_dapm_aif_in:
229 case snd_soc_dapm_aif_out:
232 /* does effect routing - dynamically connected */
233 case snd_soc_dapm_hp:
234 case snd_soc_dapm_mic:
235 case snd_soc_dapm_spk:
236 case snd_soc_dapm_line:
237 case snd_soc_dapm_pre:
238 case snd_soc_dapm_post:
244 /* connect mux widget to its interconnecting audio paths */
245 static int dapm_connect_mux(struct snd_soc_codec *codec,
246 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
247 struct snd_soc_dapm_path *path, const char *control_name,
248 const struct snd_kcontrol_new *kcontrol)
250 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
253 for (i = 0; i < e->max; i++) {
254 if (!(strcmp(control_name, e->texts[i]))) {
255 list_add(&path->list, &codec->dapm_paths);
256 list_add(&path->list_sink, &dest->sources);
257 list_add(&path->list_source, &src->sinks);
258 path->name = (char*)e->texts[i];
259 dapm_set_path_status(dest, path, 0);
267 /* connect mixer widget to its interconnecting audio paths */
268 static int dapm_connect_mixer(struct snd_soc_codec *codec,
269 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
270 struct snd_soc_dapm_path *path, const char *control_name)
274 /* search for mixer kcontrol */
275 for (i = 0; i < dest->num_kcontrols; i++) {
276 if (!strcmp(control_name, dest->kcontrols[i].name)) {
277 list_add(&path->list, &codec->dapm_paths);
278 list_add(&path->list_sink, &dest->sources);
279 list_add(&path->list_source, &src->sinks);
280 path->name = dest->kcontrols[i].name;
281 dapm_set_path_status(dest, path, i);
288 /* update dapm codec register bits */
289 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
292 unsigned int old, new;
293 struct snd_soc_codec *codec = widget->codec;
295 /* check for valid widgets */
296 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
297 widget->id == snd_soc_dapm_output ||
298 widget->id == snd_soc_dapm_hp ||
299 widget->id == snd_soc_dapm_mic ||
300 widget->id == snd_soc_dapm_line ||
301 widget->id == snd_soc_dapm_spk)
304 power = widget->power;
306 power = (power ? 0:1);
308 old = snd_soc_read(codec, widget->reg);
309 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
313 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
314 widget->name, widget->power ? "on" : "off",
316 pop_wait(codec->pop_time);
317 snd_soc_write(codec, widget->reg, new);
319 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
324 /* ramps the volume up or down to minimise pops before or after a
325 * DAPM power event */
326 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
328 const struct snd_kcontrol_new *k = widget->kcontrols;
330 if (widget->muted && !power)
332 if (!widget->muted && power)
335 if (widget->num_kcontrols && k) {
336 struct soc_mixer_control *mc =
337 (struct soc_mixer_control *)k->private_value;
338 unsigned int reg = mc->reg;
339 unsigned int shift = mc->shift;
341 unsigned int mask = (1 << fls(max)) - 1;
342 unsigned int invert = mc->invert;
346 /* power up has happended, increase volume to last level */
348 for (i = max; i > widget->saved_value; i--)
349 snd_soc_update_bits(widget->codec, reg, mask, i);
351 for (i = 0; i < widget->saved_value; i++)
352 snd_soc_update_bits(widget->codec, reg, mask, i);
356 /* power down is about to occur, decrease volume to mute */
357 int val = snd_soc_read(widget->codec, reg);
358 int i = widget->saved_value = (val >> shift) & mask;
360 for (; i < mask; i++)
361 snd_soc_update_bits(widget->codec, reg, mask, i);
364 snd_soc_update_bits(widget->codec, reg, mask, i);
372 /* create new dapm mixer control */
373 static int dapm_new_mixer(struct snd_soc_codec *codec,
374 struct snd_soc_dapm_widget *w)
378 struct snd_soc_dapm_path *path;
381 for (i = 0; i < w->num_kcontrols; i++) {
384 list_for_each_entry(path, &w->sources, list_sink) {
386 /* mixer/mux paths name must match control name */
387 if (path->name != (char*)w->kcontrols[i].name)
390 /* add dapm control with long name.
391 * for dapm_mixer this is the concatenation of the
392 * mixer and kcontrol name.
393 * for dapm_mixer_named_ctl this is simply the
396 name_len = strlen(w->kcontrols[i].name) + 1;
397 if (w->id != snd_soc_dapm_mixer_named_ctl)
398 name_len += 1 + strlen(w->name);
400 path->long_name = kmalloc(name_len, GFP_KERNEL);
402 if (path->long_name == NULL)
407 snprintf(path->long_name, name_len, "%s %s",
408 w->name, w->kcontrols[i].name);
410 case snd_soc_dapm_mixer_named_ctl:
411 snprintf(path->long_name, name_len, "%s",
412 w->kcontrols[i].name);
416 path->long_name[name_len - 1] = '\0';
418 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
420 ret = snd_ctl_add(codec->card, path->kcontrol);
422 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s: %d\n",
425 kfree(path->long_name);
426 path->long_name = NULL;
434 /* create new dapm mux control */
435 static int dapm_new_mux(struct snd_soc_codec *codec,
436 struct snd_soc_dapm_widget *w)
438 struct snd_soc_dapm_path *path = NULL;
439 struct snd_kcontrol *kcontrol;
442 if (!w->num_kcontrols) {
443 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
447 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
448 ret = snd_ctl_add(codec->card, kcontrol);
452 list_for_each_entry(path, &w->sources, list_sink)
453 path->kcontrol = kcontrol;
458 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
462 /* create new dapm volume control */
463 static int dapm_new_pga(struct snd_soc_codec *codec,
464 struct snd_soc_dapm_widget *w)
466 struct snd_kcontrol *kcontrol;
469 if (!w->num_kcontrols)
472 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
473 ret = snd_ctl_add(codec->card, kcontrol);
475 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
482 /* reset 'walked' bit for each dapm path */
483 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
485 struct snd_soc_dapm_path *p;
487 list_for_each_entry(p, &codec->dapm_paths, list)
492 * Recursively check for a completed path to an active or physically connected
493 * output widget. Returns number of complete paths.
495 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
497 struct snd_soc_dapm_path *path;
500 if (widget->id == snd_soc_dapm_supply)
503 switch (widget->id) {
504 case snd_soc_dapm_adc:
505 case snd_soc_dapm_aif_out:
512 if (widget->connected) {
513 /* connected pin ? */
514 if (widget->id == snd_soc_dapm_output && !widget->ext)
517 /* connected jack or spk ? */
518 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
519 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
523 list_for_each_entry(path, &widget->sinks, list_source) {
527 if (path->sink && path->connect) {
529 con += is_connected_output_ep(path->sink);
537 * Recursively check for a completed path to an active or physically connected
538 * input widget. Returns number of complete paths.
540 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
542 struct snd_soc_dapm_path *path;
545 if (widget->id == snd_soc_dapm_supply)
548 /* active stream ? */
549 switch (widget->id) {
550 case snd_soc_dapm_dac:
551 case snd_soc_dapm_aif_in:
558 if (widget->connected) {
559 /* connected pin ? */
560 if (widget->id == snd_soc_dapm_input && !widget->ext)
563 /* connected VMID/Bias for lower pops */
564 if (widget->id == snd_soc_dapm_vmid)
567 /* connected jack ? */
568 if (widget->id == snd_soc_dapm_mic ||
569 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
573 list_for_each_entry(path, &widget->sources, list_sink) {
577 if (path->source && path->connect) {
579 con += is_connected_input_ep(path->source);
587 * Handler for generic register modifier widget.
589 int dapm_reg_event(struct snd_soc_dapm_widget *w,
590 struct snd_kcontrol *kcontrol, int event)
594 if (SND_SOC_DAPM_EVENT_ON(event))
599 snd_soc_update_bits(w->codec, -(w->reg + 1),
600 w->mask << w->shift, val << w->shift);
604 EXPORT_SYMBOL_GPL(dapm_reg_event);
606 /* Standard power change method, used to apply power changes to most
609 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
613 /* call any power change event handlers */
615 pr_debug("power %s event for %s flags %x\n",
616 w->power ? "on" : "off",
617 w->name, w->event_flags);
619 /* power up pre event */
620 if (w->power && w->event &&
621 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
622 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
627 /* power down pre event */
628 if (!w->power && w->event &&
629 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
630 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
635 /* Lower PGA volume to reduce pops */
636 if (w->id == snd_soc_dapm_pga && !w->power)
637 dapm_set_pga(w, w->power);
641 /* Raise PGA volume to reduce pops */
642 if (w->id == snd_soc_dapm_pga && w->power)
643 dapm_set_pga(w, w->power);
645 /* power up post event */
646 if (w->power && w->event &&
647 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
649 NULL, SND_SOC_DAPM_POST_PMU);
654 /* power down post event */
655 if (!w->power && w->event &&
656 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
657 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
665 /* Generic check to see if a widget should be powered.
667 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
671 in = is_connected_input_ep(w);
672 dapm_clear_walk(w->codec);
673 out = is_connected_output_ep(w);
674 dapm_clear_walk(w->codec);
675 return out != 0 && in != 0;
678 /* Check to see if an ADC has power */
679 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
684 in = is_connected_input_ep(w);
685 dapm_clear_walk(w->codec);
688 return dapm_generic_check_power(w);
692 /* Check to see if a DAC has power */
693 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
698 out = is_connected_output_ep(w);
699 dapm_clear_walk(w->codec);
702 return dapm_generic_check_power(w);
706 /* Check to see if a power supply is needed */
707 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
709 struct snd_soc_dapm_path *path;
712 /* Check if one of our outputs is connected */
713 list_for_each_entry(path, &w->sinks, list_source) {
714 if (path->connected &&
715 !path->connected(path->source, path->sink))
718 if (path->sink && path->sink->power_check &&
719 path->sink->power_check(path->sink)) {
725 dapm_clear_walk(w->codec);
730 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
731 struct snd_soc_dapm_widget *b,
734 if (a->codec != b->codec)
735 return (unsigned long)a - (unsigned long)b;
736 if (sort[a->id] != sort[b->id])
737 return sort[a->id] - sort[b->id];
738 if (a->reg != b->reg)
739 return a->reg - b->reg;
744 /* Insert a widget in order into a DAPM power sequence. */
745 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
746 struct list_head *list,
749 struct snd_soc_dapm_widget *w;
751 list_for_each_entry(w, list, power_list)
752 if (dapm_seq_compare(new_widget, w, sort) < 0) {
753 list_add_tail(&new_widget->power_list, &w->power_list);
757 list_add_tail(&new_widget->power_list, list);
760 /* Apply the coalesced changes from a DAPM sequence */
761 static void dapm_seq_run_coalesced(struct snd_soc_codec *codec,
762 struct list_head *pending)
764 struct snd_soc_dapm_widget *w;
766 unsigned int value = 0;
767 unsigned int mask = 0;
768 unsigned int cur_mask;
770 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
773 list_for_each_entry(w, pending, power_list) {
774 cur_mask = 1 << w->shift;
775 BUG_ON(reg != w->reg);
786 pop_dbg(codec->pop_time,
787 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
788 w->name, reg, value, mask);
790 /* power up pre event */
791 if (w->power && w->event &&
792 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
793 pop_dbg(codec->pop_time, "pop test : %s PRE_PMU\n",
795 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
797 pr_err("%s: pre event failed: %d\n",
801 /* power down pre event */
802 if (!w->power && w->event &&
803 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
804 pop_dbg(codec->pop_time, "pop test : %s PRE_PMD\n",
806 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
808 pr_err("%s: pre event failed: %d\n",
812 /* Lower PGA volume to reduce pops */
813 if (w->id == snd_soc_dapm_pga && !w->power)
814 dapm_set_pga(w, w->power);
818 pop_dbg(codec->pop_time,
819 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
820 value, mask, reg, codec->pop_time);
821 pop_wait(codec->pop_time);
822 snd_soc_update_bits(codec, reg, mask, value);
825 list_for_each_entry(w, pending, power_list) {
826 /* Raise PGA volume to reduce pops */
827 if (w->id == snd_soc_dapm_pga && w->power)
828 dapm_set_pga(w, w->power);
830 /* power up post event */
831 if (w->power && w->event &&
832 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
833 pop_dbg(codec->pop_time, "pop test : %s POST_PMU\n",
836 NULL, SND_SOC_DAPM_POST_PMU);
838 pr_err("%s: post event failed: %d\n",
842 /* power down post event */
843 if (!w->power && w->event &&
844 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
845 pop_dbg(codec->pop_time, "pop test : %s POST_PMD\n",
847 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
849 pr_err("%s: post event failed: %d\n",
855 /* Apply a DAPM power sequence.
857 * We walk over a pre-sorted list of widgets to apply power to. In
858 * order to minimise the number of writes to the device required
859 * multiple widgets will be updated in a single write where possible.
860 * Currently anything that requires more than a single write is not
863 static void dapm_seq_run(struct snd_soc_codec *codec, struct list_head *list,
864 int event, int sort[])
866 struct snd_soc_dapm_widget *w, *n;
869 int cur_reg = SND_SOC_NOPM;
872 list_for_each_entry_safe(w, n, list, power_list) {
875 /* Do we need to apply any queued changes? */
876 if (sort[w->id] != cur_sort || w->reg != cur_reg) {
877 if (!list_empty(&pending))
878 dapm_seq_run_coalesced(codec, &pending);
880 INIT_LIST_HEAD(&pending);
882 cur_reg = SND_SOC_NOPM;
886 case snd_soc_dapm_pre:
888 list_for_each_entry_safe_continue(w, n, list,
891 if (event == SND_SOC_DAPM_STREAM_START)
893 NULL, SND_SOC_DAPM_PRE_PMU);
894 else if (event == SND_SOC_DAPM_STREAM_STOP)
896 NULL, SND_SOC_DAPM_PRE_PMD);
899 case snd_soc_dapm_post:
901 list_for_each_entry_safe_continue(w, n, list,
904 if (event == SND_SOC_DAPM_STREAM_START)
906 NULL, SND_SOC_DAPM_POST_PMU);
907 else if (event == SND_SOC_DAPM_STREAM_STOP)
909 NULL, SND_SOC_DAPM_POST_PMD);
912 case snd_soc_dapm_input:
913 case snd_soc_dapm_output:
914 case snd_soc_dapm_hp:
915 case snd_soc_dapm_mic:
916 case snd_soc_dapm_line:
917 case snd_soc_dapm_spk:
918 /* No register support currently */
919 ret = dapm_generic_apply_power(w);
923 /* Queue it up for application */
924 cur_sort = sort[w->id];
926 list_move(&w->power_list, &pending);
931 pr_err("Failed to apply widget power: %d\n",
935 if (!list_empty(&pending))
936 dapm_seq_run_coalesced(codec, &pending);
940 * Scan each dapm widget for complete audio path.
941 * A complete path is a route that has valid endpoints i.e.:-
943 * o DAC to output pin.
944 * o Input Pin to ADC.
945 * o Input pin to Output pin (bypass, sidetone)
946 * o DAC to ADC (loopback).
948 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
950 struct snd_soc_device *socdev = codec->socdev;
951 struct snd_soc_dapm_widget *w;
953 LIST_HEAD(down_list);
958 /* Check which widgets we need to power and store them in
959 * lists indicating if they should be powered up or down.
961 list_for_each_entry(w, &codec->dapm_widgets, list) {
963 case snd_soc_dapm_pre:
964 dapm_seq_insert(w, &down_list, dapm_down_seq);
966 case snd_soc_dapm_post:
967 dapm_seq_insert(w, &up_list, dapm_up_seq);
974 /* If we're suspending then pull down all the
977 case SND_SOC_DAPM_STREAM_SUSPEND:
983 power = w->power_check(w);
991 if (w->power == power)
995 dapm_seq_insert(w, &up_list, dapm_up_seq);
997 dapm_seq_insert(w, &down_list, dapm_down_seq);
1004 /* If there are no DAPM widgets then try to figure out power from the
1007 if (list_empty(&codec->dapm_widgets)) {
1009 case SND_SOC_DAPM_STREAM_START:
1010 case SND_SOC_DAPM_STREAM_RESUME:
1013 case SND_SOC_DAPM_STREAM_SUSPEND:
1016 case SND_SOC_DAPM_STREAM_NOP:
1017 switch (codec->bias_level) {
1018 case SND_SOC_BIAS_STANDBY:
1019 case SND_SOC_BIAS_OFF:
1032 if (sys_power && codec->bias_level == SND_SOC_BIAS_OFF) {
1033 ret = snd_soc_dapm_set_bias_level(socdev,
1034 SND_SOC_BIAS_STANDBY);
1036 pr_err("Failed to turn on bias: %d\n", ret);
1039 /* If we're changing to all on or all off then prepare */
1040 if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
1041 (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {
1042 ret = snd_soc_dapm_set_bias_level(socdev,
1043 SND_SOC_BIAS_PREPARE);
1045 pr_err("Failed to prepare bias: %d\n", ret);
1048 /* Power down widgets first; try to avoid amplifying pops. */
1049 dapm_seq_run(codec, &down_list, event, dapm_down_seq);
1052 dapm_seq_run(codec, &up_list, event, dapm_up_seq);
1054 /* If we just powered the last thing off drop to standby bias */
1055 if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
1056 ret = snd_soc_dapm_set_bias_level(socdev,
1057 SND_SOC_BIAS_STANDBY);
1059 pr_err("Failed to apply standby bias: %d\n", ret);
1062 /* If we're in standby and can support bias off then do that */
1063 if (codec->bias_level == SND_SOC_BIAS_STANDBY &&
1064 codec->idle_bias_off) {
1065 ret = snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF);
1067 pr_err("Failed to turn off bias: %d\n", ret);
1070 /* If we just powered up then move to active bias */
1071 if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
1072 ret = snd_soc_dapm_set_bias_level(socdev,
1075 pr_err("Failed to apply active bias: %d\n", ret);
1078 pop_dbg(codec->pop_time, "DAPM sequencing finished, waiting %dms\n",
1080 pop_wait(codec->pop_time);
1085 #ifdef CONFIG_DEBUG_FS
1086 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1088 file->private_data = inode->i_private;
1092 static ssize_t dapm_widget_power_read_file(struct file *file,
1093 char __user *user_buf,
1094 size_t count, loff_t *ppos)
1096 struct snd_soc_dapm_widget *w = file->private_data;
1100 struct snd_soc_dapm_path *p = NULL;
1102 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1106 in = is_connected_input_ep(w);
1107 dapm_clear_walk(w->codec);
1108 out = is_connected_output_ep(w);
1109 dapm_clear_walk(w->codec);
1111 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1112 w->name, w->power ? "On" : "Off", in, out);
1115 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1116 " - R%d(0x%x) bit %d",
1117 w->reg, w->reg, w->shift);
1119 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1122 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1124 w->active ? "active" : "inactive");
1126 list_for_each_entry(p, &w->sources, list_sink) {
1127 if (p->connected && !p->connected(w, p->sink))
1131 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1133 p->name ? p->name : "static",
1136 list_for_each_entry(p, &w->sinks, list_source) {
1137 if (p->connected && !p->connected(w, p->sink))
1141 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1143 p->name ? p->name : "static",
1147 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1153 static const struct file_operations dapm_widget_power_fops = {
1154 .open = dapm_widget_power_open_file,
1155 .read = dapm_widget_power_read_file,
1158 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1160 struct snd_soc_dapm_widget *w;
1163 if (!codec->debugfs_dapm)
1166 list_for_each_entry(w, &codec->dapm_widgets, list) {
1170 d = debugfs_create_file(w->name, 0444,
1171 codec->debugfs_dapm, w,
1172 &dapm_widget_power_fops);
1175 "ASoC: Failed to create %s debugfs file\n",
1180 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1185 /* test and update the power status of a mux widget */
1186 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1187 struct snd_kcontrol *kcontrol, int change,
1188 int mux, struct soc_enum *e)
1190 struct snd_soc_dapm_path *path;
1193 if (widget->id != snd_soc_dapm_mux &&
1194 widget->id != snd_soc_dapm_value_mux)
1200 /* find dapm widget path assoc with kcontrol */
1201 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1202 if (path->kcontrol != kcontrol)
1205 if (!path->name || !e->texts[mux])
1209 /* we now need to match the string in the enum to the path */
1210 if (!(strcmp(path->name, e->texts[mux])))
1211 path->connect = 1; /* new connection */
1213 path->connect = 0; /* old connection must be powered down */
1217 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1222 /* test and update the power status of a mixer or switch widget */
1223 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1224 struct snd_kcontrol *kcontrol, int connect)
1226 struct snd_soc_dapm_path *path;
1229 if (widget->id != snd_soc_dapm_mixer &&
1230 widget->id != snd_soc_dapm_mixer_named_ctl &&
1231 widget->id != snd_soc_dapm_switch)
1234 /* find dapm widget path assoc with kcontrol */
1235 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1236 if (path->kcontrol != kcontrol)
1239 /* found, now check type */
1241 path->connect = connect;
1246 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1251 /* show dapm widget status in sys fs */
1252 static ssize_t dapm_widget_show(struct device *dev,
1253 struct device_attribute *attr, char *buf)
1255 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1256 struct snd_soc_codec *codec = devdata->card->codec;
1257 struct snd_soc_dapm_widget *w;
1259 char *state = "not set";
1261 list_for_each_entry(w, &codec->dapm_widgets, list) {
1263 /* only display widgets that burnm power */
1265 case snd_soc_dapm_hp:
1266 case snd_soc_dapm_mic:
1267 case snd_soc_dapm_spk:
1268 case snd_soc_dapm_line:
1269 case snd_soc_dapm_micbias:
1270 case snd_soc_dapm_dac:
1271 case snd_soc_dapm_adc:
1272 case snd_soc_dapm_pga:
1273 case snd_soc_dapm_mixer:
1274 case snd_soc_dapm_mixer_named_ctl:
1275 case snd_soc_dapm_supply:
1277 count += sprintf(buf + count, "%s: %s\n",
1278 w->name, w->power ? "On":"Off");
1285 switch (codec->bias_level) {
1286 case SND_SOC_BIAS_ON:
1289 case SND_SOC_BIAS_PREPARE:
1292 case SND_SOC_BIAS_STANDBY:
1295 case SND_SOC_BIAS_OFF:
1299 count += sprintf(buf + count, "PM State: %s\n", state);
1304 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1306 int snd_soc_dapm_sys_add(struct device *dev)
1308 return device_create_file(dev, &dev_attr_dapm_widget);
1311 static void snd_soc_dapm_sys_remove(struct device *dev)
1313 device_remove_file(dev, &dev_attr_dapm_widget);
1316 /* free all dapm widgets and resources */
1317 static void dapm_free_widgets(struct snd_soc_codec *codec)
1319 struct snd_soc_dapm_widget *w, *next_w;
1320 struct snd_soc_dapm_path *p, *next_p;
1322 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
1327 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
1329 kfree(p->long_name);
1334 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
1335 const char *pin, int status)
1337 struct snd_soc_dapm_widget *w;
1339 list_for_each_entry(w, &codec->dapm_widgets, list) {
1340 if (!strcmp(w->name, pin)) {
1341 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
1342 w->connected = status;
1347 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
1352 * snd_soc_dapm_sync - scan and power dapm paths
1353 * @codec: audio codec
1355 * Walks all dapm audio paths and powers widgets according to their
1356 * stream or path usage.
1358 * Returns 0 for success.
1360 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
1362 return dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1364 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1366 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
1367 const struct snd_soc_dapm_route *route)
1369 struct snd_soc_dapm_path *path;
1370 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1371 const char *sink = route->sink;
1372 const char *control = route->control;
1373 const char *source = route->source;
1376 /* find src and dest widgets */
1377 list_for_each_entry(w, &codec->dapm_widgets, list) {
1379 if (!wsink && !(strcmp(w->name, sink))) {
1383 if (!wsource && !(strcmp(w->name, source))) {
1388 if (wsource == NULL || wsink == NULL)
1391 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1395 path->source = wsource;
1397 path->connected = route->connected;
1398 INIT_LIST_HEAD(&path->list);
1399 INIT_LIST_HEAD(&path->list_source);
1400 INIT_LIST_HEAD(&path->list_sink);
1402 /* check for external widgets */
1403 if (wsink->id == snd_soc_dapm_input) {
1404 if (wsource->id == snd_soc_dapm_micbias ||
1405 wsource->id == snd_soc_dapm_mic ||
1406 wsource->id == snd_soc_dapm_line ||
1407 wsource->id == snd_soc_dapm_output)
1410 if (wsource->id == snd_soc_dapm_output) {
1411 if (wsink->id == snd_soc_dapm_spk ||
1412 wsink->id == snd_soc_dapm_hp ||
1413 wsink->id == snd_soc_dapm_line ||
1414 wsink->id == snd_soc_dapm_input)
1418 /* connect static paths */
1419 if (control == NULL) {
1420 list_add(&path->list, &codec->dapm_paths);
1421 list_add(&path->list_sink, &wsink->sources);
1422 list_add(&path->list_source, &wsource->sinks);
1427 /* connect dynamic paths */
1429 case snd_soc_dapm_adc:
1430 case snd_soc_dapm_dac:
1431 case snd_soc_dapm_pga:
1432 case snd_soc_dapm_input:
1433 case snd_soc_dapm_output:
1434 case snd_soc_dapm_micbias:
1435 case snd_soc_dapm_vmid:
1436 case snd_soc_dapm_pre:
1437 case snd_soc_dapm_post:
1438 case snd_soc_dapm_supply:
1439 case snd_soc_dapm_aif_in:
1440 case snd_soc_dapm_aif_out:
1441 list_add(&path->list, &codec->dapm_paths);
1442 list_add(&path->list_sink, &wsink->sources);
1443 list_add(&path->list_source, &wsource->sinks);
1446 case snd_soc_dapm_mux:
1447 case snd_soc_dapm_value_mux:
1448 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1449 &wsink->kcontrols[0]);
1453 case snd_soc_dapm_switch:
1454 case snd_soc_dapm_mixer:
1455 case snd_soc_dapm_mixer_named_ctl:
1456 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1460 case snd_soc_dapm_hp:
1461 case snd_soc_dapm_mic:
1462 case snd_soc_dapm_line:
1463 case snd_soc_dapm_spk:
1464 list_add(&path->list, &codec->dapm_paths);
1465 list_add(&path->list_sink, &wsink->sources);
1466 list_add(&path->list_source, &wsource->sinks);
1473 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1480 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1482 * @route: audio routes
1483 * @num: number of routes
1485 * Connects 2 dapm widgets together via a named audio path. The sink is
1486 * the widget receiving the audio signal, whilst the source is the sender
1487 * of the audio signal.
1489 * Returns 0 for success else error. On error all resources can be freed
1490 * with a call to snd_soc_card_free().
1492 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1493 const struct snd_soc_dapm_route *route, int num)
1497 for (i = 0; i < num; i++) {
1498 ret = snd_soc_dapm_add_route(codec, route);
1500 printk(KERN_ERR "Failed to add route %s->%s\n",
1510 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1513 * snd_soc_dapm_new_widgets - add new dapm widgets
1514 * @codec: audio codec
1516 * Checks the codec for any new dapm widgets and creates them if found.
1518 * Returns 0 for success.
1520 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1522 struct snd_soc_dapm_widget *w;
1524 list_for_each_entry(w, &codec->dapm_widgets, list)
1530 case snd_soc_dapm_switch:
1531 case snd_soc_dapm_mixer:
1532 case snd_soc_dapm_mixer_named_ctl:
1533 w->power_check = dapm_generic_check_power;
1534 dapm_new_mixer(codec, w);
1536 case snd_soc_dapm_mux:
1537 case snd_soc_dapm_value_mux:
1538 w->power_check = dapm_generic_check_power;
1539 dapm_new_mux(codec, w);
1541 case snd_soc_dapm_adc:
1542 case snd_soc_dapm_aif_out:
1543 w->power_check = dapm_adc_check_power;
1545 case snd_soc_dapm_dac:
1546 case snd_soc_dapm_aif_in:
1547 w->power_check = dapm_dac_check_power;
1549 case snd_soc_dapm_pga:
1550 w->power_check = dapm_generic_check_power;
1551 dapm_new_pga(codec, w);
1553 case snd_soc_dapm_input:
1554 case snd_soc_dapm_output:
1555 case snd_soc_dapm_micbias:
1556 case snd_soc_dapm_spk:
1557 case snd_soc_dapm_hp:
1558 case snd_soc_dapm_mic:
1559 case snd_soc_dapm_line:
1560 w->power_check = dapm_generic_check_power;
1562 case snd_soc_dapm_supply:
1563 w->power_check = dapm_supply_check_power;
1564 case snd_soc_dapm_vmid:
1565 case snd_soc_dapm_pre:
1566 case snd_soc_dapm_post:
1572 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1575 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1578 * snd_soc_dapm_get_volsw - dapm mixer get callback
1579 * @kcontrol: mixer control
1580 * @ucontrol: control element information
1582 * Callback to get the value of a dapm mixer control.
1584 * Returns 0 for success.
1586 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1587 struct snd_ctl_elem_value *ucontrol)
1589 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1590 struct soc_mixer_control *mc =
1591 (struct soc_mixer_control *)kcontrol->private_value;
1592 unsigned int reg = mc->reg;
1593 unsigned int shift = mc->shift;
1594 unsigned int rshift = mc->rshift;
1596 unsigned int invert = mc->invert;
1597 unsigned int mask = (1 << fls(max)) - 1;
1599 /* return the saved value if we are powered down */
1600 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1601 ucontrol->value.integer.value[0] = widget->saved_value;
1605 ucontrol->value.integer.value[0] =
1606 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1607 if (shift != rshift)
1608 ucontrol->value.integer.value[1] =
1609 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1611 ucontrol->value.integer.value[0] =
1612 max - ucontrol->value.integer.value[0];
1613 if (shift != rshift)
1614 ucontrol->value.integer.value[1] =
1615 max - ucontrol->value.integer.value[1];
1620 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1623 * snd_soc_dapm_put_volsw - dapm mixer set callback
1624 * @kcontrol: mixer control
1625 * @ucontrol: control element information
1627 * Callback to set the value of a dapm mixer control.
1629 * Returns 0 for success.
1631 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1632 struct snd_ctl_elem_value *ucontrol)
1634 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1635 struct soc_mixer_control *mc =
1636 (struct soc_mixer_control *)kcontrol->private_value;
1637 unsigned int reg = mc->reg;
1638 unsigned int shift = mc->shift;
1639 unsigned int rshift = mc->rshift;
1641 unsigned int mask = (1 << fls(max)) - 1;
1642 unsigned int invert = mc->invert;
1643 unsigned int val, val2, val_mask;
1647 val = (ucontrol->value.integer.value[0] & mask);
1651 val_mask = mask << shift;
1653 if (shift != rshift) {
1654 val2 = (ucontrol->value.integer.value[1] & mask);
1657 val_mask |= mask << rshift;
1658 val |= val2 << rshift;
1661 mutex_lock(&widget->codec->mutex);
1662 widget->value = val;
1664 /* save volume value if the widget is powered down */
1665 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1666 widget->saved_value = val;
1667 mutex_unlock(&widget->codec->mutex);
1671 if (snd_soc_test_bits(widget->codec, reg, val_mask, val)) {
1673 /* new connection */
1674 connect = invert ? 0:1;
1676 /* old connection must be powered down */
1677 connect = invert ? 1:0;
1679 dapm_mixer_update_power(widget, kcontrol, connect);
1682 if (widget->event) {
1683 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1684 ret = widget->event(widget, kcontrol,
1685 SND_SOC_DAPM_PRE_REG);
1691 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1692 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1693 ret = widget->event(widget, kcontrol,
1694 SND_SOC_DAPM_POST_REG);
1696 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1699 mutex_unlock(&widget->codec->mutex);
1702 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1705 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1706 * @kcontrol: mixer control
1707 * @ucontrol: control element information
1709 * Callback to get the value of a dapm enumerated double mixer control.
1711 * Returns 0 for success.
1713 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1714 struct snd_ctl_elem_value *ucontrol)
1716 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1717 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1718 unsigned int val, bitmask;
1720 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1722 val = snd_soc_read(widget->codec, e->reg);
1723 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1724 if (e->shift_l != e->shift_r)
1725 ucontrol->value.enumerated.item[1] =
1726 (val >> e->shift_r) & (bitmask - 1);
1730 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1733 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1734 * @kcontrol: mixer control
1735 * @ucontrol: control element information
1737 * Callback to set the value of a dapm enumerated double mixer control.
1739 * Returns 0 for success.
1741 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1742 struct snd_ctl_elem_value *ucontrol)
1744 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1745 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1746 unsigned int val, mux, change;
1747 unsigned int mask, bitmask;
1750 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1752 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1754 mux = ucontrol->value.enumerated.item[0];
1755 val = mux << e->shift_l;
1756 mask = (bitmask - 1) << e->shift_l;
1757 if (e->shift_l != e->shift_r) {
1758 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1760 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1761 mask |= (bitmask - 1) << e->shift_r;
1764 mutex_lock(&widget->codec->mutex);
1765 widget->value = val;
1766 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1767 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1769 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1770 ret = widget->event(widget,
1771 kcontrol, SND_SOC_DAPM_PRE_REG);
1776 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1778 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1779 ret = widget->event(widget,
1780 kcontrol, SND_SOC_DAPM_POST_REG);
1783 mutex_unlock(&widget->codec->mutex);
1786 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1789 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1790 * @kcontrol: mixer control
1791 * @ucontrol: control element information
1793 * Returns 0 for success.
1795 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
1796 struct snd_ctl_elem_value *ucontrol)
1798 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1800 ucontrol->value.enumerated.item[0] = widget->value;
1804 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
1807 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1808 * @kcontrol: mixer control
1809 * @ucontrol: control element information
1811 * Returns 0 for success.
1813 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
1814 struct snd_ctl_elem_value *ucontrol)
1816 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1817 struct soc_enum *e =
1818 (struct soc_enum *)kcontrol->private_value;
1822 if (ucontrol->value.enumerated.item[0] >= e->max)
1825 mutex_lock(&widget->codec->mutex);
1827 change = widget->value != ucontrol->value.enumerated.item[0];
1828 widget->value = ucontrol->value.enumerated.item[0];
1829 dapm_mux_update_power(widget, kcontrol, change, widget->value, e);
1831 mutex_unlock(&widget->codec->mutex);
1834 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
1837 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1839 * @kcontrol: mixer control
1840 * @ucontrol: control element information
1842 * Callback to get the value of a dapm semi enumerated double mixer control.
1844 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1845 * used for handling bitfield coded enumeration for example.
1847 * Returns 0 for success.
1849 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1850 struct snd_ctl_elem_value *ucontrol)
1852 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1853 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1854 unsigned int reg_val, val, mux;
1856 reg_val = snd_soc_read(widget->codec, e->reg);
1857 val = (reg_val >> e->shift_l) & e->mask;
1858 for (mux = 0; mux < e->max; mux++) {
1859 if (val == e->values[mux])
1862 ucontrol->value.enumerated.item[0] = mux;
1863 if (e->shift_l != e->shift_r) {
1864 val = (reg_val >> e->shift_r) & e->mask;
1865 for (mux = 0; mux < e->max; mux++) {
1866 if (val == e->values[mux])
1869 ucontrol->value.enumerated.item[1] = mux;
1874 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1877 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1879 * @kcontrol: mixer control
1880 * @ucontrol: control element information
1882 * Callback to set the value of a dapm semi enumerated double mixer control.
1884 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1885 * used for handling bitfield coded enumeration for example.
1887 * Returns 0 for success.
1889 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1890 struct snd_ctl_elem_value *ucontrol)
1892 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1893 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1894 unsigned int val, mux, change;
1898 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1900 mux = ucontrol->value.enumerated.item[0];
1901 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1902 mask = e->mask << e->shift_l;
1903 if (e->shift_l != e->shift_r) {
1904 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1906 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1907 mask |= e->mask << e->shift_r;
1910 mutex_lock(&widget->codec->mutex);
1911 widget->value = val;
1912 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1913 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1915 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1916 ret = widget->event(widget,
1917 kcontrol, SND_SOC_DAPM_PRE_REG);
1922 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1924 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1925 ret = widget->event(widget,
1926 kcontrol, SND_SOC_DAPM_POST_REG);
1929 mutex_unlock(&widget->codec->mutex);
1932 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1935 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1937 * @kcontrol: mixer control
1938 * @uinfo: control element information
1940 * Callback to provide information about a pin switch control.
1942 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1943 struct snd_ctl_elem_info *uinfo)
1945 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1947 uinfo->value.integer.min = 0;
1948 uinfo->value.integer.max = 1;
1952 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1955 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1957 * @kcontrol: mixer control
1960 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1961 struct snd_ctl_elem_value *ucontrol)
1963 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1964 const char *pin = (const char *)kcontrol->private_value;
1966 mutex_lock(&codec->mutex);
1968 ucontrol->value.integer.value[0] =
1969 snd_soc_dapm_get_pin_status(codec, pin);
1971 mutex_unlock(&codec->mutex);
1975 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1978 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1980 * @kcontrol: mixer control
1983 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
1984 struct snd_ctl_elem_value *ucontrol)
1986 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1987 const char *pin = (const char *)kcontrol->private_value;
1989 mutex_lock(&codec->mutex);
1991 if (ucontrol->value.integer.value[0])
1992 snd_soc_dapm_enable_pin(codec, pin);
1994 snd_soc_dapm_disable_pin(codec, pin);
1996 snd_soc_dapm_sync(codec);
1998 mutex_unlock(&codec->mutex);
2002 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2005 * snd_soc_dapm_new_control - create new dapm control
2006 * @codec: audio codec
2007 * @widget: widget template
2009 * Creates a new dapm control based upon the template.
2011 * Returns 0 for success else error.
2013 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
2014 const struct snd_soc_dapm_widget *widget)
2016 struct snd_soc_dapm_widget *w;
2018 if ((w = dapm_cnew_widget(widget)) == NULL)
2022 INIT_LIST_HEAD(&w->sources);
2023 INIT_LIST_HEAD(&w->sinks);
2024 INIT_LIST_HEAD(&w->list);
2025 list_add(&w->list, &codec->dapm_widgets);
2027 /* machine layer set ups unconnected pins and insertions */
2031 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2034 * snd_soc_dapm_new_controls - create new dapm controls
2035 * @codec: audio codec
2036 * @widget: widget array
2037 * @num: number of widgets
2039 * Creates new DAPM controls based upon the templates.
2041 * Returns 0 for success else error.
2043 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
2044 const struct snd_soc_dapm_widget *widget,
2049 for (i = 0; i < num; i++) {
2050 ret = snd_soc_dapm_new_control(codec, widget);
2053 "ASoC: Failed to create DAPM control %s: %d\n",
2061 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2065 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2066 * @codec: audio codec
2067 * @stream: stream name
2068 * @event: stream event
2070 * Sends a stream event to the dapm core. The core then makes any
2071 * necessary widget power changes.
2073 * Returns 0 for success else error.
2075 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
2076 char *stream, int event)
2078 struct snd_soc_dapm_widget *w;
2083 mutex_lock(&codec->mutex);
2084 list_for_each_entry(w, &codec->dapm_widgets, list)
2088 pr_debug("widget %s\n %s stream %s event %d\n",
2089 w->name, w->sname, stream, event);
2090 if (strstr(w->sname, stream)) {
2092 case SND_SOC_DAPM_STREAM_START:
2095 case SND_SOC_DAPM_STREAM_STOP:
2098 case SND_SOC_DAPM_STREAM_SUSPEND:
2103 case SND_SOC_DAPM_STREAM_RESUME:
2109 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2111 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2117 dapm_power_widgets(codec, event);
2118 mutex_unlock(&codec->mutex);
2121 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2124 * snd_soc_dapm_enable_pin - enable pin.
2128 * Enables input/output pin and its parents or children widgets iff there is
2129 * a valid audio route and active audio stream.
2130 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2131 * do any widget power switching.
2133 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
2135 return snd_soc_dapm_set_pin(codec, pin, 1);
2137 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2140 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2144 * Enables input/output pin regardless of any other state. This is
2145 * intended for use with microphone bias supplies used in microphone
2148 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2149 * do any widget power switching.
2151 int snd_soc_dapm_force_enable_pin(struct snd_soc_codec *codec, const char *pin)
2153 struct snd_soc_dapm_widget *w;
2155 list_for_each_entry(w, &codec->dapm_widgets, list) {
2156 if (!strcmp(w->name, pin)) {
2157 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
2164 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
2167 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2170 * snd_soc_dapm_disable_pin - disable pin.
2174 * Disables input/output pin and its parents or children widgets.
2175 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2176 * do any widget power switching.
2178 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
2180 return snd_soc_dapm_set_pin(codec, pin, 0);
2182 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2185 * snd_soc_dapm_nc_pin - permanently disable pin.
2189 * Marks the specified pin as being not connected, disabling it along
2190 * any parent or child widgets. At present this is identical to
2191 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2192 * additional things such as disabling controls which only affect
2193 * paths through the pin.
2195 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2196 * do any widget power switching.
2198 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
2200 return snd_soc_dapm_set_pin(codec, pin, 0);
2202 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2205 * snd_soc_dapm_get_pin_status - get audio pin status
2206 * @codec: audio codec
2207 * @pin: audio signal pin endpoint (or start point)
2209 * Get audio pin status - connected or disconnected.
2211 * Returns 1 for connected otherwise 0.
2213 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
2215 struct snd_soc_dapm_widget *w;
2217 list_for_each_entry(w, &codec->dapm_widgets, list) {
2218 if (!strcmp(w->name, pin))
2219 return w->connected;
2224 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2227 * snd_soc_dapm_free - free dapm resources
2228 * @socdev: SoC device
2230 * Free all dapm widgets and resources.
2232 void snd_soc_dapm_free(struct snd_soc_device *socdev)
2234 struct snd_soc_codec *codec = socdev->card->codec;
2236 snd_soc_dapm_sys_remove(socdev->dev);
2237 dapm_free_widgets(codec);
2239 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2242 * snd_soc_dapm_shutdown - callback for system shutdown
2244 void snd_soc_dapm_shutdown(struct snd_soc_device *socdev)
2246 struct snd_soc_codec *codec = socdev->card->codec;
2247 struct snd_soc_dapm_widget *w;
2248 LIST_HEAD(down_list);
2251 list_for_each_entry(w, &codec->dapm_widgets, list) {
2253 dapm_seq_insert(w, &down_list, dapm_down_seq);
2259 /* If there were no widgets to power down we're already in
2263 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE);
2264 dapm_seq_run(codec, &down_list, 0, dapm_down_seq);
2265 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY);
2268 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF);
2271 /* Module information */
2272 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2273 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2274 MODULE_LICENSE("GPL");