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>
49 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
51 #define dump_dapm(codec, action)
54 /* dapm power sequences - make this per codec in the future */
55 static int dapm_up_seq[] = {
56 [snd_soc_dapm_pre] = 0,
57 [snd_soc_dapm_supply] = 1,
58 [snd_soc_dapm_micbias] = 2,
59 [snd_soc_dapm_mic] = 3,
60 [snd_soc_dapm_mux] = 4,
61 [snd_soc_dapm_value_mux] = 4,
62 [snd_soc_dapm_dac] = 5,
63 [snd_soc_dapm_mixer] = 6,
64 [snd_soc_dapm_mixer_named_ctl] = 6,
65 [snd_soc_dapm_pga] = 7,
66 [snd_soc_dapm_adc] = 8,
67 [snd_soc_dapm_hp] = 9,
68 [snd_soc_dapm_spk] = 9,
69 [snd_soc_dapm_post] = 10,
72 static int dapm_down_seq[] = {
73 [snd_soc_dapm_pre] = 0,
74 [snd_soc_dapm_adc] = 1,
75 [snd_soc_dapm_hp] = 2,
76 [snd_soc_dapm_spk] = 2,
77 [snd_soc_dapm_pga] = 4,
78 [snd_soc_dapm_mixer_named_ctl] = 5,
79 [snd_soc_dapm_mixer] = 5,
80 [snd_soc_dapm_dac] = 6,
81 [snd_soc_dapm_mic] = 7,
82 [snd_soc_dapm_micbias] = 8,
83 [snd_soc_dapm_mux] = 9,
84 [snd_soc_dapm_value_mux] = 9,
85 [snd_soc_dapm_supply] = 10,
86 [snd_soc_dapm_post] = 11,
89 static void pop_wait(u32 pop_time)
92 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
95 static void pop_dbg(u32 pop_time, const char *fmt, ...)
109 /* create a new dapm widget */
110 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
111 const struct snd_soc_dapm_widget *_widget)
113 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
117 * snd_soc_dapm_set_bias_level - set the bias level for the system
118 * @socdev: audio device
119 * @level: level to configure
121 * Configure the bias (power) levels for the SoC audio device.
123 * Returns 0 for success else error.
125 static int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
126 enum snd_soc_bias_level level)
128 struct snd_soc_card *card = socdev->card;
129 struct snd_soc_codec *codec = socdev->card->codec;
133 case SND_SOC_BIAS_ON:
134 dev_dbg(socdev->dev, "Setting full bias\n");
136 case SND_SOC_BIAS_PREPARE:
137 dev_dbg(socdev->dev, "Setting bias prepare\n");
139 case SND_SOC_BIAS_STANDBY:
140 dev_dbg(socdev->dev, "Setting standby bias\n");
142 case SND_SOC_BIAS_OFF:
143 dev_dbg(socdev->dev, "Setting bias off\n");
146 dev_err(socdev->dev, "Setting invalid bias %d\n", level);
150 if (card->set_bias_level)
151 ret = card->set_bias_level(card, level);
153 if (codec->set_bias_level)
154 ret = codec->set_bias_level(codec, level);
156 codec->bias_level = level;
162 /* set up initial codec paths */
163 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
164 struct snd_soc_dapm_path *p, int i)
167 case snd_soc_dapm_switch:
168 case snd_soc_dapm_mixer:
169 case snd_soc_dapm_mixer_named_ctl: {
171 struct soc_mixer_control *mc = (struct soc_mixer_control *)
172 w->kcontrols[i].private_value;
173 unsigned int reg = mc->reg;
174 unsigned int shift = mc->shift;
176 unsigned int mask = (1 << fls(max)) - 1;
177 unsigned int invert = mc->invert;
179 val = snd_soc_read(w->codec, reg);
180 val = (val >> shift) & mask;
182 if ((invert && !val) || (!invert && val))
188 case snd_soc_dapm_mux: {
189 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
190 int val, item, bitmask;
192 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
194 val = snd_soc_read(w->codec, e->reg);
195 item = (val >> e->shift_l) & (bitmask - 1);
198 for (i = 0; i < e->max; i++) {
199 if (!(strcmp(p->name, e->texts[i])) && item == i)
204 case snd_soc_dapm_value_mux: {
205 struct soc_enum *e = (struct soc_enum *)
206 w->kcontrols[i].private_value;
209 val = snd_soc_read(w->codec, e->reg);
210 val = (val >> e->shift_l) & e->mask;
211 for (item = 0; item < e->max; item++) {
212 if (val == e->values[item])
217 for (i = 0; i < e->max; i++) {
218 if (!(strcmp(p->name, e->texts[i])) && item == i)
223 /* does not effect routing - always connected */
224 case snd_soc_dapm_pga:
225 case snd_soc_dapm_output:
226 case snd_soc_dapm_adc:
227 case snd_soc_dapm_input:
228 case snd_soc_dapm_dac:
229 case snd_soc_dapm_micbias:
230 case snd_soc_dapm_vmid:
231 case snd_soc_dapm_supply:
234 /* does effect routing - dynamically connected */
235 case snd_soc_dapm_hp:
236 case snd_soc_dapm_mic:
237 case snd_soc_dapm_spk:
238 case snd_soc_dapm_line:
239 case snd_soc_dapm_pre:
240 case snd_soc_dapm_post:
246 /* connect mux widget to its interconnecting audio paths */
247 static int dapm_connect_mux(struct snd_soc_codec *codec,
248 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
249 struct snd_soc_dapm_path *path, const char *control_name,
250 const struct snd_kcontrol_new *kcontrol)
252 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
255 for (i = 0; i < e->max; i++) {
256 if (!(strcmp(control_name, e->texts[i]))) {
257 list_add(&path->list, &codec->dapm_paths);
258 list_add(&path->list_sink, &dest->sources);
259 list_add(&path->list_source, &src->sinks);
260 path->name = (char*)e->texts[i];
261 dapm_set_path_status(dest, path, 0);
269 /* connect mixer widget to its interconnecting audio paths */
270 static int dapm_connect_mixer(struct snd_soc_codec *codec,
271 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
272 struct snd_soc_dapm_path *path, const char *control_name)
276 /* search for mixer kcontrol */
277 for (i = 0; i < dest->num_kcontrols; i++) {
278 if (!strcmp(control_name, dest->kcontrols[i].name)) {
279 list_add(&path->list, &codec->dapm_paths);
280 list_add(&path->list_sink, &dest->sources);
281 list_add(&path->list_source, &src->sinks);
282 path->name = dest->kcontrols[i].name;
283 dapm_set_path_status(dest, path, i);
290 /* update dapm codec register bits */
291 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
294 unsigned int old, new;
295 struct snd_soc_codec *codec = widget->codec;
297 /* check for valid widgets */
298 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
299 widget->id == snd_soc_dapm_output ||
300 widget->id == snd_soc_dapm_hp ||
301 widget->id == snd_soc_dapm_mic ||
302 widget->id == snd_soc_dapm_line ||
303 widget->id == snd_soc_dapm_spk)
306 power = widget->power;
308 power = (power ? 0:1);
310 old = snd_soc_read(codec, widget->reg);
311 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
315 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
316 widget->name, widget->power ? "on" : "off",
318 snd_soc_write(codec, widget->reg, new);
319 pop_wait(codec->pop_time);
321 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
326 /* ramps the volume up or down to minimise pops before or after a
327 * DAPM power event */
328 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
330 const struct snd_kcontrol_new *k = widget->kcontrols;
332 if (widget->muted && !power)
334 if (!widget->muted && power)
337 if (widget->num_kcontrols && k) {
338 struct soc_mixer_control *mc =
339 (struct soc_mixer_control *)k->private_value;
340 unsigned int reg = mc->reg;
341 unsigned int shift = mc->shift;
343 unsigned int mask = (1 << fls(max)) - 1;
344 unsigned int invert = mc->invert;
348 /* power up has happended, increase volume to last level */
350 for (i = max; i > widget->saved_value; i--)
351 snd_soc_update_bits(widget->codec, reg, mask, i);
353 for (i = 0; i < widget->saved_value; i++)
354 snd_soc_update_bits(widget->codec, reg, mask, i);
358 /* power down is about to occur, decrease volume to mute */
359 int val = snd_soc_read(widget->codec, reg);
360 int i = widget->saved_value = (val >> shift) & mask;
362 for (; i < mask; i++)
363 snd_soc_update_bits(widget->codec, reg, mask, i);
366 snd_soc_update_bits(widget->codec, reg, mask, i);
374 /* create new dapm mixer control */
375 static int dapm_new_mixer(struct snd_soc_codec *codec,
376 struct snd_soc_dapm_widget *w)
380 struct snd_soc_dapm_path *path;
383 for (i = 0; i < w->num_kcontrols; i++) {
386 list_for_each_entry(path, &w->sources, list_sink) {
388 /* mixer/mux paths name must match control name */
389 if (path->name != (char*)w->kcontrols[i].name)
392 /* add dapm control with long name.
393 * for dapm_mixer this is the concatenation of the
394 * mixer and kcontrol name.
395 * for dapm_mixer_named_ctl this is simply the
398 name_len = strlen(w->kcontrols[i].name) + 1;
399 if (w->id != snd_soc_dapm_mixer_named_ctl)
400 name_len += 1 + strlen(w->name);
402 path->long_name = kmalloc(name_len, GFP_KERNEL);
404 if (path->long_name == NULL)
409 snprintf(path->long_name, name_len, "%s %s",
410 w->name, w->kcontrols[i].name);
412 case snd_soc_dapm_mixer_named_ctl:
413 snprintf(path->long_name, name_len, "%s",
414 w->kcontrols[i].name);
418 path->long_name[name_len - 1] = '\0';
420 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
422 ret = snd_ctl_add(codec->card, path->kcontrol);
424 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s: %d\n",
427 kfree(path->long_name);
428 path->long_name = NULL;
436 /* create new dapm mux control */
437 static int dapm_new_mux(struct snd_soc_codec *codec,
438 struct snd_soc_dapm_widget *w)
440 struct snd_soc_dapm_path *path = NULL;
441 struct snd_kcontrol *kcontrol;
444 if (!w->num_kcontrols) {
445 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
449 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
450 ret = snd_ctl_add(codec->card, kcontrol);
454 list_for_each_entry(path, &w->sources, list_sink)
455 path->kcontrol = kcontrol;
460 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
464 /* create new dapm volume control */
465 static int dapm_new_pga(struct snd_soc_codec *codec,
466 struct snd_soc_dapm_widget *w)
468 struct snd_kcontrol *kcontrol;
471 if (!w->num_kcontrols)
474 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
475 ret = snd_ctl_add(codec->card, kcontrol);
477 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
484 /* reset 'walked' bit for each dapm path */
485 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
487 struct snd_soc_dapm_path *p;
489 list_for_each_entry(p, &codec->dapm_paths, list)
494 * Recursively check for a completed path to an active or physically connected
495 * output widget. Returns number of complete paths.
497 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
499 struct snd_soc_dapm_path *path;
502 if (widget->id == snd_soc_dapm_supply)
505 if (widget->id == snd_soc_dapm_adc && widget->active)
508 if (widget->connected) {
509 /* connected pin ? */
510 if (widget->id == snd_soc_dapm_output && !widget->ext)
513 /* connected jack or spk ? */
514 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
515 widget->id == snd_soc_dapm_line)
519 list_for_each_entry(path, &widget->sinks, list_source) {
523 if (path->sink && path->connect) {
525 con += is_connected_output_ep(path->sink);
533 * Recursively check for a completed path to an active or physically connected
534 * input widget. Returns number of complete paths.
536 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
538 struct snd_soc_dapm_path *path;
541 if (widget->id == snd_soc_dapm_supply)
544 /* active stream ? */
545 if (widget->id == snd_soc_dapm_dac && widget->active)
548 if (widget->connected) {
549 /* connected pin ? */
550 if (widget->id == snd_soc_dapm_input && !widget->ext)
553 /* connected VMID/Bias for lower pops */
554 if (widget->id == snd_soc_dapm_vmid)
557 /* connected jack ? */
558 if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line)
562 list_for_each_entry(path, &widget->sources, list_sink) {
566 if (path->source && path->connect) {
568 con += is_connected_input_ep(path->source);
576 * Handler for generic register modifier widget.
578 int dapm_reg_event(struct snd_soc_dapm_widget *w,
579 struct snd_kcontrol *kcontrol, int event)
583 if (SND_SOC_DAPM_EVENT_ON(event))
588 snd_soc_update_bits(w->codec, -(w->reg + 1),
589 w->mask << w->shift, val << w->shift);
593 EXPORT_SYMBOL_GPL(dapm_reg_event);
595 /* Standard power change method, used to apply power changes to most
598 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
602 /* call any power change event handlers */
604 pr_debug("power %s event for %s flags %x\n",
605 w->power ? "on" : "off",
606 w->name, w->event_flags);
608 /* power up pre event */
609 if (w->power && w->event &&
610 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
611 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
616 /* power down pre event */
617 if (!w->power && w->event &&
618 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
619 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
624 /* Lower PGA volume to reduce pops */
625 if (w->id == snd_soc_dapm_pga && !w->power)
626 dapm_set_pga(w, w->power);
630 /* Raise PGA volume to reduce pops */
631 if (w->id == snd_soc_dapm_pga && w->power)
632 dapm_set_pga(w, w->power);
634 /* power up post event */
635 if (w->power && w->event &&
636 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
638 NULL, SND_SOC_DAPM_POST_PMU);
643 /* power down post event */
644 if (!w->power && w->event &&
645 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
646 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
654 /* Generic check to see if a widget should be powered.
656 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
660 in = is_connected_input_ep(w);
661 dapm_clear_walk(w->codec);
662 out = is_connected_output_ep(w);
663 dapm_clear_walk(w->codec);
664 return out != 0 && in != 0;
667 /* Check to see if an ADC has power */
668 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
673 in = is_connected_input_ep(w);
674 dapm_clear_walk(w->codec);
677 return dapm_generic_check_power(w);
681 /* Check to see if a DAC has power */
682 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
687 out = is_connected_output_ep(w);
688 dapm_clear_walk(w->codec);
691 return dapm_generic_check_power(w);
695 /* Check to see if a power supply is needed */
696 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
698 struct snd_soc_dapm_path *path;
701 /* Check if one of our outputs is connected */
702 list_for_each_entry(path, &w->sinks, list_source) {
703 if (path->sink && path->sink->power_check &&
704 path->sink->power_check(path->sink)) {
710 dapm_clear_walk(w->codec);
715 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
716 struct snd_soc_dapm_widget *b,
719 if (sort[a->id] != sort[b->id])
720 return sort[a->id] - sort[b->id];
721 if (a->reg != b->reg)
722 return a->reg - b->reg;
727 /* Insert a widget in order into a DAPM power sequence. */
728 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
729 struct list_head *list,
732 struct snd_soc_dapm_widget *w;
734 list_for_each_entry(w, list, power_list)
735 if (dapm_seq_compare(new_widget, w, sort) < 0) {
736 list_add_tail(&new_widget->power_list, &w->power_list);
740 list_add_tail(&new_widget->power_list, list);
743 /* Apply the coalesced changes from a DAPM sequence */
744 static void dapm_seq_run_coalesced(struct snd_soc_codec *codec,
745 struct list_head *pending)
747 struct snd_soc_dapm_widget *w;
749 unsigned int value = 0;
750 unsigned int mask = 0;
751 unsigned int cur_mask;
753 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
756 list_for_each_entry(w, pending, power_list) {
757 cur_mask = 1 << w->shift;
758 BUG_ON(reg != w->reg);
769 pop_dbg(codec->pop_time,
770 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
771 w->name, reg, value, mask);
773 /* power up pre event */
774 if (w->power && w->event &&
775 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
776 pop_dbg(codec->pop_time, "pop test : %s PRE_PMU\n",
778 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
780 pr_err("%s: pre event failed: %d\n",
784 /* power down pre event */
785 if (!w->power && w->event &&
786 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
787 pop_dbg(codec->pop_time, "pop test : %s PRE_PMD\n",
789 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
791 pr_err("%s: pre event failed: %d\n",
795 /* Lower PGA volume to reduce pops */
796 if (w->id == snd_soc_dapm_pga && !w->power)
797 dapm_set_pga(w, w->power);
801 pop_dbg(codec->pop_time,
802 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
803 value, mask, reg, codec->pop_time);
804 pop_wait(codec->pop_time);
805 snd_soc_update_bits(codec, reg, mask, value);
808 list_for_each_entry(w, pending, power_list) {
809 /* Raise PGA volume to reduce pops */
810 if (w->id == snd_soc_dapm_pga && w->power)
811 dapm_set_pga(w, w->power);
813 /* power up post event */
814 if (w->power && w->event &&
815 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
816 pop_dbg(codec->pop_time, "pop test : %s POST_PMU\n",
819 NULL, SND_SOC_DAPM_POST_PMU);
821 pr_err("%s: post event failed: %d\n",
825 /* power down post event */
826 if (!w->power && w->event &&
827 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
828 pop_dbg(codec->pop_time, "pop test : %s POST_PMD\n",
830 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
832 pr_err("%s: post event failed: %d\n",
838 /* Apply a DAPM power sequence.
840 * We walk over a pre-sorted list of widgets to apply power to. In
841 * order to minimise the number of writes to the device required
842 * multiple widgets will be updated in a single write where possible.
843 * Currently anything that requires more than a single write is not
846 static void dapm_seq_run(struct snd_soc_codec *codec, struct list_head *list,
847 int event, int sort[])
849 struct snd_soc_dapm_widget *w, *n;
852 int cur_reg = SND_SOC_NOPM;
855 list_for_each_entry_safe(w, n, list, power_list) {
858 /* Do we need to apply any queued changes? */
859 if (sort[w->id] != cur_sort || w->reg != cur_reg) {
860 if (!list_empty(&pending))
861 dapm_seq_run_coalesced(codec, &pending);
863 INIT_LIST_HEAD(&pending);
865 cur_reg = SND_SOC_NOPM;
869 case snd_soc_dapm_pre:
871 list_for_each_entry_safe_continue(w, n, list,
874 if (event == SND_SOC_DAPM_STREAM_START)
876 NULL, SND_SOC_DAPM_PRE_PMU);
877 else if (event == SND_SOC_DAPM_STREAM_STOP)
879 NULL, SND_SOC_DAPM_PRE_PMD);
882 case snd_soc_dapm_post:
884 list_for_each_entry_safe_continue(w, n, list,
887 if (event == SND_SOC_DAPM_STREAM_START)
889 NULL, SND_SOC_DAPM_POST_PMU);
890 else if (event == SND_SOC_DAPM_STREAM_STOP)
892 NULL, SND_SOC_DAPM_POST_PMD);
895 case snd_soc_dapm_input:
896 case snd_soc_dapm_output:
897 case snd_soc_dapm_hp:
898 case snd_soc_dapm_mic:
899 case snd_soc_dapm_line:
900 case snd_soc_dapm_spk:
901 /* No register support currently */
902 ret = dapm_generic_apply_power(w);
906 /* Queue it up for application */
907 cur_sort = sort[w->id];
909 list_move(&w->power_list, &pending);
914 pr_err("Failed to apply widget power: %d\n",
918 if (!list_empty(&pending))
919 dapm_seq_run_coalesced(codec, &pending);
923 * Scan each dapm widget for complete audio path.
924 * A complete path is a route that has valid endpoints i.e.:-
926 * o DAC to output pin.
927 * o Input Pin to ADC.
928 * o Input pin to Output pin (bypass, sidetone)
929 * o DAC to ADC (loopback).
931 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
933 struct snd_soc_device *socdev = codec->socdev;
934 struct snd_soc_dapm_widget *w;
936 LIST_HEAD(down_list);
941 /* Check which widgets we need to power and store them in
942 * lists indicating if they should be powered up or down.
944 list_for_each_entry(w, &codec->dapm_widgets, list) {
946 case snd_soc_dapm_pre:
947 dapm_seq_insert(w, &down_list, dapm_down_seq);
949 case snd_soc_dapm_post:
950 dapm_seq_insert(w, &up_list, dapm_up_seq);
957 power = w->power_check(w);
961 if (w->power == power)
965 dapm_seq_insert(w, &up_list, dapm_up_seq);
967 dapm_seq_insert(w, &down_list, dapm_down_seq);
974 /* If there are no DAPM widgets then try to figure out power from the
977 if (list_empty(&codec->dapm_widgets)) {
979 case SND_SOC_DAPM_STREAM_START:
980 case SND_SOC_DAPM_STREAM_RESUME:
983 case SND_SOC_DAPM_STREAM_NOP:
984 sys_power = codec->bias_level != SND_SOC_BIAS_STANDBY;
990 /* If we're changing to all on or all off then prepare */
991 if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
992 (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {
993 ret = snd_soc_dapm_set_bias_level(socdev,
994 SND_SOC_BIAS_PREPARE);
996 pr_err("Failed to prepare bias: %d\n", ret);
999 /* Power down widgets first; try to avoid amplifying pops. */
1000 dapm_seq_run(codec, &down_list, event, dapm_down_seq);
1003 dapm_seq_run(codec, &up_list, event, dapm_up_seq);
1005 /* If we just powered the last thing off drop to standby bias */
1006 if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
1007 ret = snd_soc_dapm_set_bias_level(socdev,
1008 SND_SOC_BIAS_STANDBY);
1010 pr_err("Failed to apply standby bias: %d\n", ret);
1013 /* If we just powered up then move to active bias */
1014 if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
1015 ret = snd_soc_dapm_set_bias_level(socdev,
1018 pr_err("Failed to apply active bias: %d\n", ret);
1021 pop_dbg(codec->pop_time, "DAPM sequencing finished, waiting %dms\n",
1028 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
1030 struct snd_soc_dapm_widget *w;
1031 struct snd_soc_dapm_path *p = NULL;
1034 printk("DAPM %s %s\n", codec->name, action);
1036 list_for_each_entry(w, &codec->dapm_widgets, list) {
1038 /* only display widgets that effect routing */
1040 case snd_soc_dapm_pre:
1041 case snd_soc_dapm_post:
1042 case snd_soc_dapm_vmid:
1044 case snd_soc_dapm_mux:
1045 case snd_soc_dapm_value_mux:
1046 case snd_soc_dapm_output:
1047 case snd_soc_dapm_input:
1048 case snd_soc_dapm_switch:
1049 case snd_soc_dapm_hp:
1050 case snd_soc_dapm_mic:
1051 case snd_soc_dapm_spk:
1052 case snd_soc_dapm_line:
1053 case snd_soc_dapm_micbias:
1054 case snd_soc_dapm_dac:
1055 case snd_soc_dapm_adc:
1056 case snd_soc_dapm_pga:
1057 case snd_soc_dapm_mixer:
1058 case snd_soc_dapm_mixer_named_ctl:
1059 case snd_soc_dapm_supply:
1061 in = is_connected_input_ep(w);
1062 dapm_clear_walk(w->codec);
1063 out = is_connected_output_ep(w);
1064 dapm_clear_walk(w->codec);
1065 printk("%s: %s in %d out %d\n", w->name,
1066 w->power ? "On":"Off",in, out);
1068 list_for_each_entry(p, &w->sources, list_sink) {
1070 printk(" in %s %s\n", p->name ? p->name : "static",
1073 list_for_each_entry(p, &w->sinks, list_source) {
1075 printk(" out %s %s\n", p->name ? p->name : "static",
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\n",
1112 w->name, w->power ? "On" : "Off", in, out);
1114 if (w->active && w->sname)
1115 ret += snprintf(buf, PAGE_SIZE - ret, " stream %s active\n",
1118 list_for_each_entry(p, &w->sources, list_sink) {
1120 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1122 p->name ? p->name : "static",
1125 list_for_each_entry(p, &w->sinks, list_source) {
1127 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1129 p->name ? p->name : "static",
1133 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1139 static const struct file_operations dapm_widget_power_fops = {
1140 .open = dapm_widget_power_open_file,
1141 .read = dapm_widget_power_read_file,
1144 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1146 struct snd_soc_dapm_widget *w;
1149 if (!codec->debugfs_dapm)
1152 list_for_each_entry(w, &codec->dapm_widgets, list) {
1156 d = debugfs_create_file(w->name, 0444,
1157 codec->debugfs_dapm, w,
1158 &dapm_widget_power_fops);
1161 "ASoC: Failed to create %s debugfs file\n",
1166 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1171 /* test and update the power status of a mux widget */
1172 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1173 struct snd_kcontrol *kcontrol, int mask,
1174 int mux, int val, struct soc_enum *e)
1176 struct snd_soc_dapm_path *path;
1179 if (widget->id != snd_soc_dapm_mux &&
1180 widget->id != snd_soc_dapm_value_mux)
1183 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
1186 /* find dapm widget path assoc with kcontrol */
1187 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1188 if (path->kcontrol != kcontrol)
1191 if (!path->name || !e->texts[mux])
1195 /* we now need to match the string in the enum to the path */
1196 if (!(strcmp(path->name, e->texts[mux])))
1197 path->connect = 1; /* new connection */
1199 path->connect = 0; /* old connection must be powered down */
1203 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1204 dump_dapm(widget->codec, "mux power update");
1210 /* test and update the power status of a mixer or switch widget */
1211 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1212 struct snd_kcontrol *kcontrol, int reg,
1213 int val_mask, int val, int invert)
1215 struct snd_soc_dapm_path *path;
1218 if (widget->id != snd_soc_dapm_mixer &&
1219 widget->id != snd_soc_dapm_mixer_named_ctl &&
1220 widget->id != snd_soc_dapm_switch)
1223 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
1226 /* find dapm widget path assoc with kcontrol */
1227 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1228 if (path->kcontrol != kcontrol)
1231 /* found, now check type */
1234 /* new connection */
1235 path->connect = invert ? 0:1;
1237 /* old connection must be powered down */
1238 path->connect = invert ? 1:0;
1243 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1244 dump_dapm(widget->codec, "mixer power update");
1250 /* show dapm widget status in sys fs */
1251 static ssize_t dapm_widget_show(struct device *dev,
1252 struct device_attribute *attr, char *buf)
1254 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1255 struct snd_soc_codec *codec = devdata->card->codec;
1256 struct snd_soc_dapm_widget *w;
1258 char *state = "not set";
1260 list_for_each_entry(w, &codec->dapm_widgets, list) {
1262 /* only display widgets that burnm power */
1264 case snd_soc_dapm_hp:
1265 case snd_soc_dapm_mic:
1266 case snd_soc_dapm_spk:
1267 case snd_soc_dapm_line:
1268 case snd_soc_dapm_micbias:
1269 case snd_soc_dapm_dac:
1270 case snd_soc_dapm_adc:
1271 case snd_soc_dapm_pga:
1272 case snd_soc_dapm_mixer:
1273 case snd_soc_dapm_mixer_named_ctl:
1274 case snd_soc_dapm_supply:
1276 count += sprintf(buf + count, "%s: %s\n",
1277 w->name, w->power ? "On":"Off");
1284 switch (codec->bias_level) {
1285 case SND_SOC_BIAS_ON:
1288 case SND_SOC_BIAS_PREPARE:
1291 case SND_SOC_BIAS_STANDBY:
1294 case SND_SOC_BIAS_OFF:
1298 count += sprintf(buf + count, "PM State: %s\n", state);
1303 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1305 int snd_soc_dapm_sys_add(struct device *dev)
1307 return device_create_file(dev, &dev_attr_dapm_widget);
1310 static void snd_soc_dapm_sys_remove(struct device *dev)
1312 device_remove_file(dev, &dev_attr_dapm_widget);
1315 /* free all dapm widgets and resources */
1316 static void dapm_free_widgets(struct snd_soc_codec *codec)
1318 struct snd_soc_dapm_widget *w, *next_w;
1319 struct snd_soc_dapm_path *p, *next_p;
1321 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
1326 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
1328 kfree(p->long_name);
1333 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
1334 const char *pin, int status)
1336 struct snd_soc_dapm_widget *w;
1338 list_for_each_entry(w, &codec->dapm_widgets, list) {
1339 if (!strcmp(w->name, pin)) {
1340 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
1341 w->connected = status;
1346 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
1351 * snd_soc_dapm_sync - scan and power dapm paths
1352 * @codec: audio codec
1354 * Walks all dapm audio paths and powers widgets according to their
1355 * stream or path usage.
1357 * Returns 0 for success.
1359 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
1361 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1362 dump_dapm(codec, "sync");
1365 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1367 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
1368 const char *sink, const char *control, const char *source)
1370 struct snd_soc_dapm_path *path;
1371 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1374 /* find src and dest widgets */
1375 list_for_each_entry(w, &codec->dapm_widgets, list) {
1377 if (!wsink && !(strcmp(w->name, sink))) {
1381 if (!wsource && !(strcmp(w->name, source))) {
1386 if (wsource == NULL || wsink == NULL)
1389 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1393 path->source = wsource;
1395 INIT_LIST_HEAD(&path->list);
1396 INIT_LIST_HEAD(&path->list_source);
1397 INIT_LIST_HEAD(&path->list_sink);
1399 /* check for external widgets */
1400 if (wsink->id == snd_soc_dapm_input) {
1401 if (wsource->id == snd_soc_dapm_micbias ||
1402 wsource->id == snd_soc_dapm_mic ||
1403 wsource->id == snd_soc_dapm_line ||
1404 wsource->id == snd_soc_dapm_output)
1407 if (wsource->id == snd_soc_dapm_output) {
1408 if (wsink->id == snd_soc_dapm_spk ||
1409 wsink->id == snd_soc_dapm_hp ||
1410 wsink->id == snd_soc_dapm_line ||
1411 wsink->id == snd_soc_dapm_input)
1415 /* connect static paths */
1416 if (control == NULL) {
1417 list_add(&path->list, &codec->dapm_paths);
1418 list_add(&path->list_sink, &wsink->sources);
1419 list_add(&path->list_source, &wsource->sinks);
1424 /* connect dynamic paths */
1426 case snd_soc_dapm_adc:
1427 case snd_soc_dapm_dac:
1428 case snd_soc_dapm_pga:
1429 case snd_soc_dapm_input:
1430 case snd_soc_dapm_output:
1431 case snd_soc_dapm_micbias:
1432 case snd_soc_dapm_vmid:
1433 case snd_soc_dapm_pre:
1434 case snd_soc_dapm_post:
1435 case snd_soc_dapm_supply:
1436 list_add(&path->list, &codec->dapm_paths);
1437 list_add(&path->list_sink, &wsink->sources);
1438 list_add(&path->list_source, &wsource->sinks);
1441 case snd_soc_dapm_mux:
1442 case snd_soc_dapm_value_mux:
1443 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1444 &wsink->kcontrols[0]);
1448 case snd_soc_dapm_switch:
1449 case snd_soc_dapm_mixer:
1450 case snd_soc_dapm_mixer_named_ctl:
1451 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1455 case snd_soc_dapm_hp:
1456 case snd_soc_dapm_mic:
1457 case snd_soc_dapm_line:
1458 case snd_soc_dapm_spk:
1459 list_add(&path->list, &codec->dapm_paths);
1460 list_add(&path->list_sink, &wsink->sources);
1461 list_add(&path->list_source, &wsource->sinks);
1468 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1475 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1477 * @route: audio routes
1478 * @num: number of routes
1480 * Connects 2 dapm widgets together via a named audio path. The sink is
1481 * the widget receiving the audio signal, whilst the source is the sender
1482 * of the audio signal.
1484 * Returns 0 for success else error. On error all resources can be freed
1485 * with a call to snd_soc_card_free().
1487 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1488 const struct snd_soc_dapm_route *route, int num)
1492 for (i = 0; i < num; i++) {
1493 ret = snd_soc_dapm_add_route(codec, route->sink,
1494 route->control, route->source);
1496 printk(KERN_ERR "Failed to add route %s->%s\n",
1506 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1509 * snd_soc_dapm_new_widgets - add new dapm widgets
1510 * @codec: audio codec
1512 * Checks the codec for any new dapm widgets and creates them if found.
1514 * Returns 0 for success.
1516 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1518 struct snd_soc_dapm_widget *w;
1520 list_for_each_entry(w, &codec->dapm_widgets, list)
1526 case snd_soc_dapm_switch:
1527 case snd_soc_dapm_mixer:
1528 case snd_soc_dapm_mixer_named_ctl:
1529 w->power_check = dapm_generic_check_power;
1530 dapm_new_mixer(codec, w);
1532 case snd_soc_dapm_mux:
1533 case snd_soc_dapm_value_mux:
1534 w->power_check = dapm_generic_check_power;
1535 dapm_new_mux(codec, w);
1537 case snd_soc_dapm_adc:
1538 w->power_check = dapm_adc_check_power;
1540 case snd_soc_dapm_dac:
1541 w->power_check = dapm_dac_check_power;
1543 case snd_soc_dapm_pga:
1544 w->power_check = dapm_generic_check_power;
1545 dapm_new_pga(codec, w);
1547 case snd_soc_dapm_input:
1548 case snd_soc_dapm_output:
1549 case snd_soc_dapm_micbias:
1550 case snd_soc_dapm_spk:
1551 case snd_soc_dapm_hp:
1552 case snd_soc_dapm_mic:
1553 case snd_soc_dapm_line:
1554 w->power_check = dapm_generic_check_power;
1556 case snd_soc_dapm_supply:
1557 w->power_check = dapm_supply_check_power;
1558 case snd_soc_dapm_vmid:
1559 case snd_soc_dapm_pre:
1560 case snd_soc_dapm_post:
1566 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1569 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1572 * snd_soc_dapm_get_volsw - dapm mixer get callback
1573 * @kcontrol: mixer control
1574 * @ucontrol: control element information
1576 * Callback to get the value of a dapm mixer control.
1578 * Returns 0 for success.
1580 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1581 struct snd_ctl_elem_value *ucontrol)
1583 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1584 struct soc_mixer_control *mc =
1585 (struct soc_mixer_control *)kcontrol->private_value;
1586 unsigned int reg = mc->reg;
1587 unsigned int shift = mc->shift;
1588 unsigned int rshift = mc->rshift;
1590 unsigned int invert = mc->invert;
1591 unsigned int mask = (1 << fls(max)) - 1;
1593 /* return the saved value if we are powered down */
1594 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1595 ucontrol->value.integer.value[0] = widget->saved_value;
1599 ucontrol->value.integer.value[0] =
1600 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1601 if (shift != rshift)
1602 ucontrol->value.integer.value[1] =
1603 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1605 ucontrol->value.integer.value[0] =
1606 max - ucontrol->value.integer.value[0];
1607 if (shift != rshift)
1608 ucontrol->value.integer.value[1] =
1609 max - ucontrol->value.integer.value[1];
1614 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1617 * snd_soc_dapm_put_volsw - dapm mixer set callback
1618 * @kcontrol: mixer control
1619 * @ucontrol: control element information
1621 * Callback to set the value of a dapm mixer control.
1623 * Returns 0 for success.
1625 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1626 struct snd_ctl_elem_value *ucontrol)
1628 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1629 struct soc_mixer_control *mc =
1630 (struct soc_mixer_control *)kcontrol->private_value;
1631 unsigned int reg = mc->reg;
1632 unsigned int shift = mc->shift;
1633 unsigned int rshift = mc->rshift;
1635 unsigned int mask = (1 << fls(max)) - 1;
1636 unsigned int invert = mc->invert;
1637 unsigned int val, val2, val_mask;
1640 val = (ucontrol->value.integer.value[0] & mask);
1644 val_mask = mask << shift;
1646 if (shift != rshift) {
1647 val2 = (ucontrol->value.integer.value[1] & mask);
1650 val_mask |= mask << rshift;
1651 val |= val2 << rshift;
1654 mutex_lock(&widget->codec->mutex);
1655 widget->value = val;
1657 /* save volume value if the widget is powered down */
1658 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1659 widget->saved_value = val;
1660 mutex_unlock(&widget->codec->mutex);
1664 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1665 if (widget->event) {
1666 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1667 ret = widget->event(widget, kcontrol,
1668 SND_SOC_DAPM_PRE_REG);
1674 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1675 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1676 ret = widget->event(widget, kcontrol,
1677 SND_SOC_DAPM_POST_REG);
1679 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1682 mutex_unlock(&widget->codec->mutex);
1685 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1688 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1689 * @kcontrol: mixer control
1690 * @ucontrol: control element information
1692 * Callback to get the value of a dapm enumerated double mixer control.
1694 * Returns 0 for success.
1696 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1697 struct snd_ctl_elem_value *ucontrol)
1699 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1700 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1701 unsigned int val, bitmask;
1703 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1705 val = snd_soc_read(widget->codec, e->reg);
1706 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1707 if (e->shift_l != e->shift_r)
1708 ucontrol->value.enumerated.item[1] =
1709 (val >> e->shift_r) & (bitmask - 1);
1713 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1716 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1717 * @kcontrol: mixer control
1718 * @ucontrol: control element information
1720 * Callback to set the value of a dapm enumerated double mixer control.
1722 * Returns 0 for success.
1724 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1725 struct snd_ctl_elem_value *ucontrol)
1727 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1728 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1729 unsigned int val, mux;
1730 unsigned int mask, bitmask;
1733 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1735 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1737 mux = ucontrol->value.enumerated.item[0];
1738 val = mux << e->shift_l;
1739 mask = (bitmask - 1) << e->shift_l;
1740 if (e->shift_l != e->shift_r) {
1741 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1743 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1744 mask |= (bitmask - 1) << e->shift_r;
1747 mutex_lock(&widget->codec->mutex);
1748 widget->value = val;
1749 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1750 if (widget->event) {
1751 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1752 ret = widget->event(widget,
1753 kcontrol, SND_SOC_DAPM_PRE_REG);
1757 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1758 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1759 ret = widget->event(widget,
1760 kcontrol, SND_SOC_DAPM_POST_REG);
1762 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1765 mutex_unlock(&widget->codec->mutex);
1768 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1771 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1773 * @kcontrol: mixer control
1774 * @ucontrol: control element information
1776 * Callback to get the value of a dapm semi enumerated double mixer control.
1778 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1779 * used for handling bitfield coded enumeration for example.
1781 * Returns 0 for success.
1783 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1784 struct snd_ctl_elem_value *ucontrol)
1786 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1787 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1788 unsigned int reg_val, val, mux;
1790 reg_val = snd_soc_read(widget->codec, e->reg);
1791 val = (reg_val >> e->shift_l) & e->mask;
1792 for (mux = 0; mux < e->max; mux++) {
1793 if (val == e->values[mux])
1796 ucontrol->value.enumerated.item[0] = mux;
1797 if (e->shift_l != e->shift_r) {
1798 val = (reg_val >> e->shift_r) & e->mask;
1799 for (mux = 0; mux < e->max; mux++) {
1800 if (val == e->values[mux])
1803 ucontrol->value.enumerated.item[1] = mux;
1808 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1811 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1813 * @kcontrol: mixer control
1814 * @ucontrol: control element information
1816 * Callback to set the value of a dapm semi enumerated double mixer control.
1818 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1819 * used for handling bitfield coded enumeration for example.
1821 * Returns 0 for success.
1823 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1824 struct snd_ctl_elem_value *ucontrol)
1826 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1827 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1828 unsigned int val, mux;
1832 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1834 mux = ucontrol->value.enumerated.item[0];
1835 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1836 mask = e->mask << e->shift_l;
1837 if (e->shift_l != e->shift_r) {
1838 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1840 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1841 mask |= e->mask << e->shift_r;
1844 mutex_lock(&widget->codec->mutex);
1845 widget->value = val;
1846 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1847 if (widget->event) {
1848 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1849 ret = widget->event(widget,
1850 kcontrol, SND_SOC_DAPM_PRE_REG);
1854 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1855 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1856 ret = widget->event(widget,
1857 kcontrol, SND_SOC_DAPM_POST_REG);
1859 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1862 mutex_unlock(&widget->codec->mutex);
1865 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1868 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1870 * @kcontrol: mixer control
1871 * @uinfo: control element information
1873 * Callback to provide information about a pin switch control.
1875 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1876 struct snd_ctl_elem_info *uinfo)
1878 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1880 uinfo->value.integer.min = 0;
1881 uinfo->value.integer.max = 1;
1885 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1888 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1890 * @kcontrol: mixer control
1893 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1894 struct snd_ctl_elem_value *ucontrol)
1896 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1897 const char *pin = (const char *)kcontrol->private_value;
1899 mutex_lock(&codec->mutex);
1901 ucontrol->value.integer.value[0] =
1902 snd_soc_dapm_get_pin_status(codec, pin);
1904 mutex_unlock(&codec->mutex);
1908 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1911 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1913 * @kcontrol: mixer control
1916 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
1917 struct snd_ctl_elem_value *ucontrol)
1919 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1920 const char *pin = (const char *)kcontrol->private_value;
1922 mutex_lock(&codec->mutex);
1924 if (ucontrol->value.integer.value[0])
1925 snd_soc_dapm_enable_pin(codec, pin);
1927 snd_soc_dapm_disable_pin(codec, pin);
1929 snd_soc_dapm_sync(codec);
1931 mutex_unlock(&codec->mutex);
1935 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
1938 * snd_soc_dapm_new_control - create new dapm control
1939 * @codec: audio codec
1940 * @widget: widget template
1942 * Creates a new dapm control based upon the template.
1944 * Returns 0 for success else error.
1946 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1947 const struct snd_soc_dapm_widget *widget)
1949 struct snd_soc_dapm_widget *w;
1951 if ((w = dapm_cnew_widget(widget)) == NULL)
1955 INIT_LIST_HEAD(&w->sources);
1956 INIT_LIST_HEAD(&w->sinks);
1957 INIT_LIST_HEAD(&w->list);
1958 list_add(&w->list, &codec->dapm_widgets);
1960 /* machine layer set ups unconnected pins and insertions */
1964 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1967 * snd_soc_dapm_new_controls - create new dapm controls
1968 * @codec: audio codec
1969 * @widget: widget array
1970 * @num: number of widgets
1972 * Creates new DAPM controls based upon the templates.
1974 * Returns 0 for success else error.
1976 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1977 const struct snd_soc_dapm_widget *widget,
1982 for (i = 0; i < num; i++) {
1983 ret = snd_soc_dapm_new_control(codec, widget);
1986 "ASoC: Failed to create DAPM control %s: %d\n",
1994 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1998 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1999 * @codec: audio codec
2000 * @stream: stream name
2001 * @event: stream event
2003 * Sends a stream event to the dapm core. The core then makes any
2004 * necessary widget power changes.
2006 * Returns 0 for success else error.
2008 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
2009 char *stream, int event)
2011 struct snd_soc_dapm_widget *w;
2016 mutex_lock(&codec->mutex);
2017 list_for_each_entry(w, &codec->dapm_widgets, list)
2021 pr_debug("widget %s\n %s stream %s event %d\n",
2022 w->name, w->sname, stream, event);
2023 if (strstr(w->sname, stream)) {
2025 case SND_SOC_DAPM_STREAM_START:
2028 case SND_SOC_DAPM_STREAM_STOP:
2031 case SND_SOC_DAPM_STREAM_SUSPEND:
2036 case SND_SOC_DAPM_STREAM_RESUME:
2042 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2044 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2049 mutex_unlock(&codec->mutex);
2051 dapm_power_widgets(codec, event);
2052 dump_dapm(codec, __func__);
2055 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2058 * snd_soc_dapm_enable_pin - enable pin.
2062 * Enables input/output pin and its parents or children widgets iff there is
2063 * a valid audio route and active audio stream.
2064 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2065 * do any widget power switching.
2067 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
2069 return snd_soc_dapm_set_pin(codec, pin, 1);
2071 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2074 * snd_soc_dapm_disable_pin - disable pin.
2078 * Disables input/output pin and its parents or children widgets.
2079 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2080 * do any widget power switching.
2082 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
2084 return snd_soc_dapm_set_pin(codec, pin, 0);
2086 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2089 * snd_soc_dapm_nc_pin - permanently disable pin.
2093 * Marks the specified pin as being not connected, disabling it along
2094 * any parent or child widgets. At present this is identical to
2095 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2096 * additional things such as disabling controls which only affect
2097 * paths through the pin.
2099 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2100 * do any widget power switching.
2102 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
2104 return snd_soc_dapm_set_pin(codec, pin, 0);
2106 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2109 * snd_soc_dapm_get_pin_status - get audio pin status
2110 * @codec: audio codec
2111 * @pin: audio signal pin endpoint (or start point)
2113 * Get audio pin status - connected or disconnected.
2115 * Returns 1 for connected otherwise 0.
2117 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
2119 struct snd_soc_dapm_widget *w;
2121 list_for_each_entry(w, &codec->dapm_widgets, list) {
2122 if (!strcmp(w->name, pin))
2123 return w->connected;
2128 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2131 * snd_soc_dapm_free - free dapm resources
2132 * @socdev: SoC device
2134 * Free all dapm widgets and resources.
2136 void snd_soc_dapm_free(struct snd_soc_device *socdev)
2138 struct snd_soc_codec *codec = socdev->card->codec;
2140 snd_soc_dapm_sys_remove(socdev->dev);
2141 dapm_free_widgets(codec);
2143 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2146 * snd_soc_dapm_shutdown - callback for system shutdown
2148 void snd_soc_dapm_shutdown(struct snd_soc_device *socdev)
2150 struct snd_soc_codec *codec = socdev->card->codec;
2151 struct snd_soc_dapm_widget *w;
2152 LIST_HEAD(down_list);
2155 list_for_each_entry(w, &codec->dapm_widgets, list) {
2157 dapm_seq_insert(w, &down_list, dapm_down_seq);
2163 /* If there were no widgets to power down we're already in
2167 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE);
2168 dapm_seq_run(codec, &down_list, 0, dapm_down_seq);
2169 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY);
2172 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF);
2175 /* Module information */
2176 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2177 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2178 MODULE_LICENSE("GPL");