2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <linux/debugfs.h>
41 #include <linux/slab.h>
42 #include <sound/core.h>
43 #include <sound/pcm.h>
44 #include <sound/pcm_params.h>
45 #include <sound/soc.h>
46 #include <sound/initval.h>
48 #include <trace/events/asoc.h>
50 /* dapm power sequences - make this per codec in the future */
51 static int dapm_up_seq[] = {
52 [snd_soc_dapm_pre] = 0,
53 [snd_soc_dapm_supply] = 1,
54 [snd_soc_dapm_micbias] = 2,
55 [snd_soc_dapm_aif_in] = 3,
56 [snd_soc_dapm_aif_out] = 3,
57 [snd_soc_dapm_mic] = 4,
58 [snd_soc_dapm_mux] = 5,
59 [snd_soc_dapm_value_mux] = 5,
60 [snd_soc_dapm_dac] = 6,
61 [snd_soc_dapm_mixer] = 7,
62 [snd_soc_dapm_mixer_named_ctl] = 7,
63 [snd_soc_dapm_pga] = 8,
64 [snd_soc_dapm_adc] = 9,
65 [snd_soc_dapm_hp] = 10,
66 [snd_soc_dapm_spk] = 10,
67 [snd_soc_dapm_post] = 11,
70 static int dapm_down_seq[] = {
71 [snd_soc_dapm_pre] = 0,
72 [snd_soc_dapm_adc] = 1,
73 [snd_soc_dapm_hp] = 2,
74 [snd_soc_dapm_spk] = 2,
75 [snd_soc_dapm_pga] = 4,
76 [snd_soc_dapm_mixer_named_ctl] = 5,
77 [snd_soc_dapm_mixer] = 5,
78 [snd_soc_dapm_dac] = 6,
79 [snd_soc_dapm_mic] = 7,
80 [snd_soc_dapm_micbias] = 8,
81 [snd_soc_dapm_mux] = 9,
82 [snd_soc_dapm_value_mux] = 9,
83 [snd_soc_dapm_aif_in] = 10,
84 [snd_soc_dapm_aif_out] = 10,
85 [snd_soc_dapm_supply] = 11,
86 [snd_soc_dapm_post] = 12,
89 static void pop_wait(u32 pop_time)
92 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
95 static void pop_dbg(struct device *dev, u32 pop_time, const char *fmt, ...)
103 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
108 vsnprintf(buf, PAGE_SIZE, fmt, args);
115 /* create a new dapm widget */
116 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
117 const struct snd_soc_dapm_widget *_widget)
119 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
123 * snd_soc_dapm_set_bias_level - set the bias level for the system
124 * @card: audio device
125 * @level: level to configure
127 * Configure the bias (power) levels for the SoC audio device.
129 * Returns 0 for success else error.
131 static int snd_soc_dapm_set_bias_level(struct snd_soc_card *card,
132 struct snd_soc_dapm_context *dapm,
133 enum snd_soc_bias_level level)
138 case SND_SOC_BIAS_ON:
139 dev_dbg(dapm->dev, "Setting full bias\n");
141 case SND_SOC_BIAS_PREPARE:
142 dev_dbg(dapm->dev, "Setting bias prepare\n");
144 case SND_SOC_BIAS_STANDBY:
145 dev_dbg(dapm->dev, "Setting standby bias\n");
147 case SND_SOC_BIAS_OFF:
148 dev_dbg(dapm->dev, "Setting bias off\n");
151 dev_err(dapm->dev, "Setting invalid bias %d\n", level);
155 trace_snd_soc_bias_level_start(card, level);
157 if (card && card->set_bias_level)
158 ret = card->set_bias_level(card, level);
160 if (dapm->codec && dapm->codec->driver->set_bias_level)
161 ret = dapm->codec->driver->set_bias_level(dapm->codec, level);
163 dapm->bias_level = level;
166 if (card && card->set_bias_level_post)
167 ret = card->set_bias_level_post(card, level);
170 trace_snd_soc_bias_level_done(card, level);
175 /* set up initial codec paths */
176 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
177 struct snd_soc_dapm_path *p, int i)
180 case snd_soc_dapm_switch:
181 case snd_soc_dapm_mixer:
182 case snd_soc_dapm_mixer_named_ctl: {
184 struct soc_mixer_control *mc = (struct soc_mixer_control *)
185 w->kcontrols[i].private_value;
186 unsigned int reg = mc->reg;
187 unsigned int shift = mc->shift;
189 unsigned int mask = (1 << fls(max)) - 1;
190 unsigned int invert = mc->invert;
192 val = snd_soc_read(w->codec, reg);
193 val = (val >> shift) & mask;
195 if ((invert && !val) || (!invert && val))
201 case snd_soc_dapm_mux: {
202 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
203 int val, item, bitmask;
205 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
207 val = snd_soc_read(w->codec, e->reg);
208 item = (val >> e->shift_l) & (bitmask - 1);
211 for (i = 0; i < e->max; i++) {
212 if (!(strcmp(p->name, e->texts[i])) && item == i)
217 case snd_soc_dapm_value_mux: {
218 struct soc_enum *e = (struct soc_enum *)
219 w->kcontrols[i].private_value;
222 val = snd_soc_read(w->codec, e->reg);
223 val = (val >> e->shift_l) & e->mask;
224 for (item = 0; item < e->max; item++) {
225 if (val == e->values[item])
230 for (i = 0; i < e->max; i++) {
231 if (!(strcmp(p->name, e->texts[i])) && item == i)
236 /* does not effect routing - always connected */
237 case snd_soc_dapm_pga:
238 case snd_soc_dapm_output:
239 case snd_soc_dapm_adc:
240 case snd_soc_dapm_input:
241 case snd_soc_dapm_dac:
242 case snd_soc_dapm_micbias:
243 case snd_soc_dapm_vmid:
244 case snd_soc_dapm_supply:
245 case snd_soc_dapm_aif_in:
246 case snd_soc_dapm_aif_out:
249 /* does effect routing - dynamically connected */
250 case snd_soc_dapm_hp:
251 case snd_soc_dapm_mic:
252 case snd_soc_dapm_spk:
253 case snd_soc_dapm_line:
254 case snd_soc_dapm_pre:
255 case snd_soc_dapm_post:
261 /* connect mux widget to its interconnecting audio paths */
262 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
263 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
264 struct snd_soc_dapm_path *path, const char *control_name,
265 const struct snd_kcontrol_new *kcontrol)
267 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
270 for (i = 0; i < e->max; i++) {
271 if (!(strcmp(control_name, e->texts[i]))) {
272 list_add(&path->list, &dapm->paths);
273 list_add(&path->list_sink, &dest->sources);
274 list_add(&path->list_source, &src->sinks);
275 path->name = (char*)e->texts[i];
276 dapm_set_path_status(dest, path, 0);
284 /* connect mixer widget to its interconnecting audio paths */
285 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
286 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
287 struct snd_soc_dapm_path *path, const char *control_name)
291 /* search for mixer kcontrol */
292 for (i = 0; i < dest->num_kcontrols; i++) {
293 if (!strcmp(control_name, dest->kcontrols[i].name)) {
294 list_add(&path->list, &dapm->paths);
295 list_add(&path->list_sink, &dest->sources);
296 list_add(&path->list_source, &src->sinks);
297 path->name = dest->kcontrols[i].name;
298 dapm_set_path_status(dest, path, i);
305 /* update dapm codec register bits */
306 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
309 unsigned int old, new;
310 struct snd_soc_codec *codec = widget->codec;
311 struct snd_soc_dapm_context *dapm = widget->dapm;
312 struct snd_soc_card *card = dapm->card;
314 /* check for valid widgets */
315 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
316 widget->id == snd_soc_dapm_output ||
317 widget->id == snd_soc_dapm_hp ||
318 widget->id == snd_soc_dapm_mic ||
319 widget->id == snd_soc_dapm_line ||
320 widget->id == snd_soc_dapm_spk)
323 power = widget->power;
325 power = (power ? 0:1);
327 old = snd_soc_read(codec, widget->reg);
328 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
332 pop_dbg(dapm->dev, card->pop_time,
333 "pop test %s : %s in %d ms\n",
334 widget->name, widget->power ? "on" : "off",
336 pop_wait(card->pop_time);
337 snd_soc_write(codec, widget->reg, new);
339 dev_dbg(dapm->dev, "reg %x old %x new %x change %d\n", widget->reg,
344 /* create new dapm mixer control */
345 static int dapm_new_mixer(struct snd_soc_dapm_context *dapm,
346 struct snd_soc_dapm_widget *w)
350 struct snd_soc_dapm_path *path;
351 struct snd_card *card = dapm->codec->card->snd_card;
354 for (i = 0; i < w->num_kcontrols; i++) {
357 list_for_each_entry(path, &w->sources, list_sink) {
359 /* mixer/mux paths name must match control name */
360 if (path->name != (char*)w->kcontrols[i].name)
363 /* add dapm control with long name.
364 * for dapm_mixer this is the concatenation of the
365 * mixer and kcontrol name.
366 * for dapm_mixer_named_ctl this is simply the
369 name_len = strlen(w->kcontrols[i].name) + 1;
370 if (w->id != snd_soc_dapm_mixer_named_ctl)
371 name_len += 1 + strlen(w->name);
373 path->long_name = kmalloc(name_len, GFP_KERNEL);
375 if (path->long_name == NULL)
380 snprintf(path->long_name, name_len, "%s %s",
381 w->name, w->kcontrols[i].name);
383 case snd_soc_dapm_mixer_named_ctl:
384 snprintf(path->long_name, name_len, "%s",
385 w->kcontrols[i].name);
389 path->long_name[name_len - 1] = '\0';
391 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
393 ret = snd_ctl_add(card, path->kcontrol);
396 "asoc: failed to add dapm kcontrol %s: %d\n",
397 path->long_name, ret);
398 kfree(path->long_name);
399 path->long_name = NULL;
407 /* create new dapm mux control */
408 static int dapm_new_mux(struct snd_soc_dapm_context *dapm,
409 struct snd_soc_dapm_widget *w)
411 struct snd_soc_dapm_path *path = NULL;
412 struct snd_kcontrol *kcontrol;
413 struct snd_card *card = dapm->codec->card->snd_card;
416 if (!w->num_kcontrols) {
417 dev_err(dapm->dev, "asoc: mux %s has no controls\n", w->name);
421 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
422 ret = snd_ctl_add(card, kcontrol);
427 list_for_each_entry(path, &w->sources, list_sink)
428 path->kcontrol = kcontrol;
433 dev_err(dapm->dev, "asoc: failed to add kcontrol %s\n", w->name);
437 /* create new dapm volume control */
438 static int dapm_new_pga(struct snd_soc_dapm_context *dapm,
439 struct snd_soc_dapm_widget *w)
441 if (w->num_kcontrols)
442 dev_err(w->dapm->dev,
443 "asoc: PGA controls not supported: '%s'\n", w->name);
448 /* reset 'walked' bit for each dapm path */
449 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
451 struct snd_soc_dapm_path *p;
453 list_for_each_entry(p, &dapm->paths, list)
457 /* We implement power down on suspend by checking the power state of
458 * the ALSA card - when we are suspending the ALSA state for the card
461 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
463 int level = snd_power_get_state(widget->dapm->codec->card->snd_card);
466 case SNDRV_CTL_POWER_D3hot:
467 case SNDRV_CTL_POWER_D3cold:
468 if (widget->ignore_suspend)
469 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
471 return widget->ignore_suspend;
478 * Recursively check for a completed path to an active or physically connected
479 * output widget. Returns number of complete paths.
481 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
483 struct snd_soc_dapm_path *path;
486 if (widget->id == snd_soc_dapm_supply)
489 switch (widget->id) {
490 case snd_soc_dapm_adc:
491 case snd_soc_dapm_aif_out:
493 return snd_soc_dapm_suspend_check(widget);
498 if (widget->connected) {
499 /* connected pin ? */
500 if (widget->id == snd_soc_dapm_output && !widget->ext)
501 return snd_soc_dapm_suspend_check(widget);
503 /* connected jack or spk ? */
504 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
505 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
506 return snd_soc_dapm_suspend_check(widget);
509 list_for_each_entry(path, &widget->sinks, list_source) {
513 if (path->sink && path->connect) {
515 con += is_connected_output_ep(path->sink);
523 * Recursively check for a completed path to an active or physically connected
524 * input widget. Returns number of complete paths.
526 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
528 struct snd_soc_dapm_path *path;
531 if (widget->id == snd_soc_dapm_supply)
534 /* active stream ? */
535 switch (widget->id) {
536 case snd_soc_dapm_dac:
537 case snd_soc_dapm_aif_in:
539 return snd_soc_dapm_suspend_check(widget);
544 if (widget->connected) {
545 /* connected pin ? */
546 if (widget->id == snd_soc_dapm_input && !widget->ext)
547 return snd_soc_dapm_suspend_check(widget);
549 /* connected VMID/Bias for lower pops */
550 if (widget->id == snd_soc_dapm_vmid)
551 return snd_soc_dapm_suspend_check(widget);
553 /* connected jack ? */
554 if (widget->id == snd_soc_dapm_mic ||
555 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
556 return snd_soc_dapm_suspend_check(widget);
559 list_for_each_entry(path, &widget->sources, list_sink) {
563 if (path->source && path->connect) {
565 con += is_connected_input_ep(path->source);
573 * Handler for generic register modifier widget.
575 int dapm_reg_event(struct snd_soc_dapm_widget *w,
576 struct snd_kcontrol *kcontrol, int event)
580 if (SND_SOC_DAPM_EVENT_ON(event))
585 snd_soc_update_bits(w->codec, -(w->reg + 1),
586 w->mask << w->shift, val << w->shift);
590 EXPORT_SYMBOL_GPL(dapm_reg_event);
592 /* Standard power change method, used to apply power changes to most
595 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
599 /* call any power change event handlers */
601 dev_dbg(w->dapm->dev, "power %s event for %s flags %x\n",
602 w->power ? "on" : "off",
603 w->name, w->event_flags);
605 /* power up pre event */
606 if (w->power && w->event &&
607 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
608 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
613 /* power down pre event */
614 if (!w->power && w->event &&
615 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
616 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
623 /* power up post event */
624 if (w->power && w->event &&
625 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
627 NULL, SND_SOC_DAPM_POST_PMU);
632 /* power down post event */
633 if (!w->power && w->event &&
634 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
635 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
643 /* Generic check to see if a widget should be powered.
645 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
649 in = is_connected_input_ep(w);
650 dapm_clear_walk(w->dapm);
651 out = is_connected_output_ep(w);
652 dapm_clear_walk(w->dapm);
653 return out != 0 && in != 0;
656 /* Check to see if an ADC has power */
657 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
662 in = is_connected_input_ep(w);
663 dapm_clear_walk(w->dapm);
666 return dapm_generic_check_power(w);
670 /* Check to see if a DAC has power */
671 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
676 out = is_connected_output_ep(w);
677 dapm_clear_walk(w->dapm);
680 return dapm_generic_check_power(w);
684 /* Check to see if a power supply is needed */
685 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
687 struct snd_soc_dapm_path *path;
690 /* Check if one of our outputs is connected */
691 list_for_each_entry(path, &w->sinks, list_source) {
692 if (path->connected &&
693 !path->connected(path->source, path->sink))
696 if (path->sink && path->sink->power_check &&
697 path->sink->power_check(path->sink)) {
703 dapm_clear_walk(w->dapm);
708 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
709 struct snd_soc_dapm_widget *b,
712 if (sort[a->id] != sort[b->id])
713 return sort[a->id] - sort[b->id];
714 if (a->reg != b->reg)
715 return a->reg - b->reg;
716 if (a->dapm != b->dapm)
717 return (unsigned long)a->dapm - (unsigned long)b->dapm;
722 /* Insert a widget in order into a DAPM power sequence. */
723 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
724 struct list_head *list,
727 struct snd_soc_dapm_widget *w;
729 list_for_each_entry(w, list, power_list)
730 if (dapm_seq_compare(new_widget, w, sort) < 0) {
731 list_add_tail(&new_widget->power_list, &w->power_list);
735 list_add_tail(&new_widget->power_list, list);
738 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
739 struct snd_soc_dapm_widget *w, int event)
741 struct snd_soc_card *card = dapm->card;
746 case SND_SOC_DAPM_PRE_PMU:
750 case SND_SOC_DAPM_POST_PMU:
751 ev_name = "POST_PMU";
754 case SND_SOC_DAPM_PRE_PMD:
758 case SND_SOC_DAPM_POST_PMD:
759 ev_name = "POST_PMD";
767 if (w->power != power)
770 if (w->event && (w->event_flags & event)) {
771 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
773 trace_snd_soc_dapm_widget_event_start(w, event);
774 ret = w->event(w, NULL, event);
775 trace_snd_soc_dapm_widget_event_done(w, event);
777 pr_err("%s: %s event failed: %d\n",
778 ev_name, w->name, ret);
782 /* Apply the coalesced changes from a DAPM sequence */
783 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
784 struct list_head *pending)
786 struct snd_soc_card *card = dapm->card;
787 struct snd_soc_dapm_widget *w;
789 unsigned int value = 0;
790 unsigned int mask = 0;
791 unsigned int cur_mask;
793 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
796 list_for_each_entry(w, pending, power_list) {
797 cur_mask = 1 << w->shift;
798 BUG_ON(reg != w->reg);
809 pop_dbg(dapm->dev, card->pop_time,
810 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
811 w->name, reg, value, mask);
813 /* Check for events */
814 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
815 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
819 pop_dbg(dapm->dev, card->pop_time,
820 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
821 value, mask, reg, card->pop_time);
822 pop_wait(card->pop_time);
823 snd_soc_update_bits(dapm->codec, reg, mask, value);
826 list_for_each_entry(w, pending, power_list) {
827 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
828 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
832 /* Apply a DAPM power sequence.
834 * We walk over a pre-sorted list of widgets to apply power to. In
835 * order to minimise the number of writes to the device required
836 * multiple widgets will be updated in a single write where possible.
837 * Currently anything that requires more than a single write is not
840 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
841 struct list_head *list, int event, int sort[])
843 struct snd_soc_dapm_widget *w, *n;
846 int cur_reg = SND_SOC_NOPM;
849 list_for_each_entry_safe(w, n, list, power_list) {
852 /* Do we need to apply any queued changes? */
853 if (sort[w->id] != cur_sort || w->reg != cur_reg) {
854 if (!list_empty(&pending))
855 dapm_seq_run_coalesced(dapm, &pending);
857 INIT_LIST_HEAD(&pending);
859 cur_reg = SND_SOC_NOPM;
863 case snd_soc_dapm_pre:
865 list_for_each_entry_safe_continue(w, n, list,
868 if (event == SND_SOC_DAPM_STREAM_START)
870 NULL, SND_SOC_DAPM_PRE_PMU);
871 else if (event == SND_SOC_DAPM_STREAM_STOP)
873 NULL, SND_SOC_DAPM_PRE_PMD);
876 case snd_soc_dapm_post:
878 list_for_each_entry_safe_continue(w, n, list,
881 if (event == SND_SOC_DAPM_STREAM_START)
883 NULL, SND_SOC_DAPM_POST_PMU);
884 else if (event == SND_SOC_DAPM_STREAM_STOP)
886 NULL, SND_SOC_DAPM_POST_PMD);
889 case snd_soc_dapm_input:
890 case snd_soc_dapm_output:
891 case snd_soc_dapm_hp:
892 case snd_soc_dapm_mic:
893 case snd_soc_dapm_line:
894 case snd_soc_dapm_spk:
895 /* No register support currently */
896 ret = dapm_generic_apply_power(w);
900 /* Queue it up for application */
901 cur_sort = sort[w->id];
903 list_move(&w->power_list, &pending);
908 dev_err(w->dapm->dev,
909 "Failed to apply widget power: %d\n", ret);
912 if (!list_empty(&pending))
913 dapm_seq_run_coalesced(dapm, &pending);
917 * Scan each dapm widget for complete audio path.
918 * A complete path is a route that has valid endpoints i.e.:-
920 * o DAC to output pin.
921 * o Input Pin to ADC.
922 * o Input pin to Output pin (bypass, sidetone)
923 * o DAC to ADC (loopback).
925 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
927 struct snd_soc_card *card = dapm->codec->card;
928 struct snd_soc_dapm_widget *w;
930 LIST_HEAD(down_list);
935 trace_snd_soc_dapm_start(card);
937 /* Check which widgets we need to power and store them in
938 * lists indicating if they should be powered up or down.
940 list_for_each_entry(w, &dapm->widgets, list) {
942 case snd_soc_dapm_pre:
943 dapm_seq_insert(w, &down_list, dapm_down_seq);
945 case snd_soc_dapm_post:
946 dapm_seq_insert(w, &up_list, dapm_up_seq);
954 power = w->power_check(w);
960 if (w->power == power)
963 trace_snd_soc_dapm_widget_power(w, power);
966 dapm_seq_insert(w, &up_list, dapm_up_seq);
968 dapm_seq_insert(w, &down_list, dapm_down_seq);
975 /* If there are no DAPM widgets then try to figure out power from the
978 if (list_empty(&dapm->widgets)) {
980 case SND_SOC_DAPM_STREAM_START:
981 case SND_SOC_DAPM_STREAM_RESUME:
984 case SND_SOC_DAPM_STREAM_STOP:
985 sys_power = !!codec->active;
987 case SND_SOC_DAPM_STREAM_SUSPEND:
990 case SND_SOC_DAPM_STREAM_NOP:
991 switch (dapm->bias_level) {
992 case SND_SOC_BIAS_STANDBY:
993 case SND_SOC_BIAS_OFF:
1006 if (sys_power && dapm->bias_level == SND_SOC_BIAS_OFF) {
1007 ret = snd_soc_dapm_set_bias_level(card, dapm,
1008 SND_SOC_BIAS_STANDBY);
1011 "Failed to turn on bias: %d\n", ret);
1014 /* If we're changing to all on or all off then prepare */
1015 if ((sys_power && dapm->bias_level == SND_SOC_BIAS_STANDBY) ||
1016 (!sys_power && dapm->bias_level == SND_SOC_BIAS_ON)) {
1017 ret = snd_soc_dapm_set_bias_level(card, dapm, SND_SOC_BIAS_PREPARE);
1020 "Failed to prepare bias: %d\n", ret);
1023 /* Power down widgets first; try to avoid amplifying pops. */
1024 dapm_seq_run(dapm, &down_list, event, dapm_down_seq);
1027 dapm_seq_run(dapm, &up_list, event, dapm_up_seq);
1029 /* If we just powered the last thing off drop to standby bias */
1030 if (dapm->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
1031 ret = snd_soc_dapm_set_bias_level(card, dapm, SND_SOC_BIAS_STANDBY);
1034 "Failed to apply standby bias: %d\n", ret);
1037 /* If we're in standby and can support bias off then do that */
1038 if (dapm->bias_level == SND_SOC_BIAS_STANDBY &&
1039 dapm->idle_bias_off) {
1040 ret = snd_soc_dapm_set_bias_level(card, dapm, SND_SOC_BIAS_OFF);
1043 "Failed to turn off bias: %d\n", ret);
1046 /* If we just powered up then move to active bias */
1047 if (dapm->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
1048 ret = snd_soc_dapm_set_bias_level(card, dapm, SND_SOC_BIAS_ON);
1051 "Failed to apply active bias: %d\n", ret);
1054 pop_dbg(dapm->dev, card->pop_time,
1055 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1056 pop_wait(card->pop_time);
1058 trace_snd_soc_dapm_done(card);
1063 #ifdef CONFIG_DEBUG_FS
1064 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1066 file->private_data = inode->i_private;
1070 static ssize_t dapm_widget_power_read_file(struct file *file,
1071 char __user *user_buf,
1072 size_t count, loff_t *ppos)
1074 struct snd_soc_dapm_widget *w = file->private_data;
1078 struct snd_soc_dapm_path *p = NULL;
1080 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1084 in = is_connected_input_ep(w);
1085 dapm_clear_walk(w->dapm);
1086 out = is_connected_output_ep(w);
1087 dapm_clear_walk(w->dapm);
1089 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1090 w->name, w->power ? "On" : "Off", in, out);
1093 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1094 " - R%d(0x%x) bit %d",
1095 w->reg, w->reg, w->shift);
1097 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1100 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1102 w->active ? "active" : "inactive");
1104 list_for_each_entry(p, &w->sources, list_sink) {
1105 if (p->connected && !p->connected(w, p->sink))
1109 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1111 p->name ? p->name : "static",
1114 list_for_each_entry(p, &w->sinks, list_source) {
1115 if (p->connected && !p->connected(w, p->sink))
1119 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1121 p->name ? p->name : "static",
1125 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1131 static const struct file_operations dapm_widget_power_fops = {
1132 .open = dapm_widget_power_open_file,
1133 .read = dapm_widget_power_read_file,
1134 .llseek = default_llseek,
1137 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm)
1139 struct snd_soc_dapm_widget *w;
1142 if (!dapm->debugfs_dapm)
1145 list_for_each_entry(w, &dapm->widgets, list) {
1149 d = debugfs_create_file(w->name, 0444,
1150 dapm->debugfs_dapm, w,
1151 &dapm_widget_power_fops);
1153 dev_warn(w->dapm->dev,
1154 "ASoC: Failed to create %s debugfs file\n",
1159 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm)
1164 /* test and update the power status of a mux widget */
1165 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1166 struct snd_kcontrol *kcontrol, int change,
1167 int mux, struct soc_enum *e)
1169 struct snd_soc_dapm_path *path;
1172 if (widget->id != snd_soc_dapm_mux &&
1173 widget->id != snd_soc_dapm_value_mux)
1179 /* find dapm widget path assoc with kcontrol */
1180 list_for_each_entry(path, &widget->dapm->paths, list) {
1181 if (path->kcontrol != kcontrol)
1184 if (!path->name || !e->texts[mux])
1188 /* we now need to match the string in the enum to the path */
1189 if (!(strcmp(path->name, e->texts[mux])))
1190 path->connect = 1; /* new connection */
1192 path->connect = 0; /* old connection must be powered down */
1196 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1201 /* test and update the power status of a mixer or switch widget */
1202 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1203 struct snd_kcontrol *kcontrol, int connect)
1205 struct snd_soc_dapm_path *path;
1208 if (widget->id != snd_soc_dapm_mixer &&
1209 widget->id != snd_soc_dapm_mixer_named_ctl &&
1210 widget->id != snd_soc_dapm_switch)
1213 /* find dapm widget path assoc with kcontrol */
1214 list_for_each_entry(path, &widget->dapm->paths, list) {
1215 if (path->kcontrol != kcontrol)
1218 /* found, now check type */
1220 path->connect = connect;
1225 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1230 /* show dapm widget status in sys fs */
1231 static ssize_t dapm_widget_show(struct device *dev,
1232 struct device_attribute *attr, char *buf)
1234 struct snd_soc_pcm_runtime *rtd =
1235 container_of(dev, struct snd_soc_pcm_runtime, dev);
1236 struct snd_soc_codec *codec =rtd->codec;
1237 struct snd_soc_dapm_widget *w;
1239 char *state = "not set";
1241 list_for_each_entry(w, &codec->dapm.widgets, list) {
1243 /* only display widgets that burnm power */
1245 case snd_soc_dapm_hp:
1246 case snd_soc_dapm_mic:
1247 case snd_soc_dapm_spk:
1248 case snd_soc_dapm_line:
1249 case snd_soc_dapm_micbias:
1250 case snd_soc_dapm_dac:
1251 case snd_soc_dapm_adc:
1252 case snd_soc_dapm_pga:
1253 case snd_soc_dapm_mixer:
1254 case snd_soc_dapm_mixer_named_ctl:
1255 case snd_soc_dapm_supply:
1257 count += sprintf(buf + count, "%s: %s\n",
1258 w->name, w->power ? "On":"Off");
1265 switch (codec->dapm.bias_level) {
1266 case SND_SOC_BIAS_ON:
1269 case SND_SOC_BIAS_PREPARE:
1272 case SND_SOC_BIAS_STANDBY:
1275 case SND_SOC_BIAS_OFF:
1279 count += sprintf(buf + count, "PM State: %s\n", state);
1284 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1286 int snd_soc_dapm_sys_add(struct device *dev)
1288 return device_create_file(dev, &dev_attr_dapm_widget);
1291 static void snd_soc_dapm_sys_remove(struct device *dev)
1293 device_remove_file(dev, &dev_attr_dapm_widget);
1296 /* free all dapm widgets and resources */
1297 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1299 struct snd_soc_dapm_widget *w, *next_w;
1300 struct snd_soc_dapm_path *p, *next_p;
1302 list_for_each_entry_safe(w, next_w, &dapm->widgets, list) {
1308 list_for_each_entry_safe(p, next_p, &dapm->paths, list) {
1310 kfree(p->long_name);
1315 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1316 const char *pin, int status)
1318 struct snd_soc_dapm_widget *w;
1320 list_for_each_entry(w, &dapm->widgets, list) {
1321 if (!strcmp(w->name, pin)) {
1322 dev_dbg(w->dapm->dev, "dapm: pin %s = %d\n",
1324 w->connected = status;
1325 /* Allow disabling of forced pins */
1332 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1337 * snd_soc_dapm_sync - scan and power dapm paths
1338 * @dapm: DAPM context
1340 * Walks all dapm audio paths and powers widgets according to their
1341 * stream or path usage.
1343 * Returns 0 for success.
1345 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1347 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1349 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1351 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1352 const struct snd_soc_dapm_route *route)
1354 struct snd_soc_dapm_path *path;
1355 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1357 const char *control = route->control;
1359 char prefixed_sink[80];
1360 char prefixed_source[80];
1363 if (dapm->codec->name_prefix) {
1364 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1365 dapm->codec->name_prefix, route->sink);
1366 sink = prefixed_sink;
1367 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1368 dapm->codec->name_prefix, route->source);
1369 source = prefixed_source;
1372 source = route->source;
1375 /* find src and dest widgets */
1376 list_for_each_entry(w, &dapm->widgets, list) {
1378 if (!wsink && !(strcmp(w->name, sink))) {
1382 if (!wsource && !(strcmp(w->name, source))) {
1387 if (wsource == NULL || wsink == NULL)
1390 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1394 path->source = wsource;
1396 path->connected = route->connected;
1397 INIT_LIST_HEAD(&path->list);
1398 INIT_LIST_HEAD(&path->list_source);
1399 INIT_LIST_HEAD(&path->list_sink);
1401 /* check for external widgets */
1402 if (wsink->id == snd_soc_dapm_input) {
1403 if (wsource->id == snd_soc_dapm_micbias ||
1404 wsource->id == snd_soc_dapm_mic ||
1405 wsource->id == snd_soc_dapm_line ||
1406 wsource->id == snd_soc_dapm_output)
1409 if (wsource->id == snd_soc_dapm_output) {
1410 if (wsink->id == snd_soc_dapm_spk ||
1411 wsink->id == snd_soc_dapm_hp ||
1412 wsink->id == snd_soc_dapm_line ||
1413 wsink->id == snd_soc_dapm_input)
1417 /* connect static paths */
1418 if (control == NULL) {
1419 list_add(&path->list, &dapm->paths);
1420 list_add(&path->list_sink, &wsink->sources);
1421 list_add(&path->list_source, &wsource->sinks);
1426 /* connect dynamic paths */
1428 case snd_soc_dapm_adc:
1429 case snd_soc_dapm_dac:
1430 case snd_soc_dapm_pga:
1431 case snd_soc_dapm_input:
1432 case snd_soc_dapm_output:
1433 case snd_soc_dapm_micbias:
1434 case snd_soc_dapm_vmid:
1435 case snd_soc_dapm_pre:
1436 case snd_soc_dapm_post:
1437 case snd_soc_dapm_supply:
1438 case snd_soc_dapm_aif_in:
1439 case snd_soc_dapm_aif_out:
1440 list_add(&path->list, &dapm->paths);
1441 list_add(&path->list_sink, &wsink->sources);
1442 list_add(&path->list_source, &wsource->sinks);
1445 case snd_soc_dapm_mux:
1446 case snd_soc_dapm_value_mux:
1447 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1448 &wsink->kcontrols[0]);
1452 case snd_soc_dapm_switch:
1453 case snd_soc_dapm_mixer:
1454 case snd_soc_dapm_mixer_named_ctl:
1455 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1459 case snd_soc_dapm_hp:
1460 case snd_soc_dapm_mic:
1461 case snd_soc_dapm_line:
1462 case snd_soc_dapm_spk:
1463 list_add(&path->list, &dapm->paths);
1464 list_add(&path->list_sink, &wsink->sources);
1465 list_add(&path->list_source, &wsource->sinks);
1472 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1473 source, control, sink);
1479 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1480 * @dapm: DAPM context
1481 * @route: audio routes
1482 * @num: number of routes
1484 * Connects 2 dapm widgets together via a named audio path. The sink is
1485 * the widget receiving the audio signal, whilst the source is the sender
1486 * of the audio signal.
1488 * Returns 0 for success else error. On error all resources can be freed
1489 * with a call to snd_soc_card_free().
1491 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1492 const struct snd_soc_dapm_route *route, int num)
1496 for (i = 0; i < num; i++) {
1497 ret = snd_soc_dapm_add_route(dapm, route);
1499 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1500 route->source, route->sink);
1508 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1511 * snd_soc_dapm_new_widgets - add new dapm widgets
1512 * @dapm: DAPM context
1514 * Checks the codec for any new dapm widgets and creates them if found.
1516 * Returns 0 for success.
1518 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
1520 struct snd_soc_dapm_widget *w;
1522 list_for_each_entry(w, &dapm->widgets, list)
1528 case snd_soc_dapm_switch:
1529 case snd_soc_dapm_mixer:
1530 case snd_soc_dapm_mixer_named_ctl:
1531 w->power_check = dapm_generic_check_power;
1532 dapm_new_mixer(dapm, w);
1534 case snd_soc_dapm_mux:
1535 case snd_soc_dapm_value_mux:
1536 w->power_check = dapm_generic_check_power;
1537 dapm_new_mux(dapm, w);
1539 case snd_soc_dapm_adc:
1540 case snd_soc_dapm_aif_out:
1541 w->power_check = dapm_adc_check_power;
1543 case snd_soc_dapm_dac:
1544 case snd_soc_dapm_aif_in:
1545 w->power_check = dapm_dac_check_power;
1547 case snd_soc_dapm_pga:
1548 w->power_check = dapm_generic_check_power;
1549 dapm_new_pga(dapm, w);
1551 case snd_soc_dapm_input:
1552 case snd_soc_dapm_output:
1553 case snd_soc_dapm_micbias:
1554 case snd_soc_dapm_spk:
1555 case snd_soc_dapm_hp:
1556 case snd_soc_dapm_mic:
1557 case snd_soc_dapm_line:
1558 w->power_check = dapm_generic_check_power;
1560 case snd_soc_dapm_supply:
1561 w->power_check = dapm_supply_check_power;
1562 case snd_soc_dapm_vmid:
1563 case snd_soc_dapm_pre:
1564 case snd_soc_dapm_post:
1570 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1573 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1576 * snd_soc_dapm_get_volsw - dapm mixer get callback
1577 * @kcontrol: mixer control
1578 * @ucontrol: control element information
1580 * Callback to get the value of a dapm mixer control.
1582 * Returns 0 for success.
1584 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1585 struct snd_ctl_elem_value *ucontrol)
1587 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1588 struct soc_mixer_control *mc =
1589 (struct soc_mixer_control *)kcontrol->private_value;
1590 unsigned int reg = mc->reg;
1591 unsigned int shift = mc->shift;
1592 unsigned int rshift = mc->rshift;
1594 unsigned int invert = mc->invert;
1595 unsigned int mask = (1 << fls(max)) - 1;
1597 ucontrol->value.integer.value[0] =
1598 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1599 if (shift != rshift)
1600 ucontrol->value.integer.value[1] =
1601 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1603 ucontrol->value.integer.value[0] =
1604 max - ucontrol->value.integer.value[0];
1605 if (shift != rshift)
1606 ucontrol->value.integer.value[1] =
1607 max - ucontrol->value.integer.value[1];
1612 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1615 * snd_soc_dapm_put_volsw - dapm mixer set callback
1616 * @kcontrol: mixer control
1617 * @ucontrol: control element information
1619 * Callback to set the value of a dapm mixer control.
1621 * Returns 0 for success.
1623 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1624 struct snd_ctl_elem_value *ucontrol)
1626 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1627 struct soc_mixer_control *mc =
1628 (struct soc_mixer_control *)kcontrol->private_value;
1629 unsigned int reg = mc->reg;
1630 unsigned int shift = mc->shift;
1631 unsigned int rshift = mc->rshift;
1633 unsigned int mask = (1 << fls(max)) - 1;
1634 unsigned int invert = mc->invert;
1635 unsigned int val, val2, val_mask;
1639 val = (ucontrol->value.integer.value[0] & mask);
1643 val_mask = mask << shift;
1645 if (shift != rshift) {
1646 val2 = (ucontrol->value.integer.value[1] & mask);
1649 val_mask |= mask << rshift;
1650 val |= val2 << rshift;
1653 mutex_lock(&widget->codec->mutex);
1654 widget->value = val;
1656 if (snd_soc_test_bits(widget->codec, reg, val_mask, val)) {
1658 /* new connection */
1659 connect = invert ? 0:1;
1661 /* old connection must be powered down */
1662 connect = invert ? 1:0;
1664 dapm_mixer_update_power(widget, kcontrol, connect);
1667 if (widget->event) {
1668 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1669 ret = widget->event(widget, kcontrol,
1670 SND_SOC_DAPM_PRE_REG);
1676 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1677 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1678 ret = widget->event(widget, kcontrol,
1679 SND_SOC_DAPM_POST_REG);
1681 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1684 mutex_unlock(&widget->codec->mutex);
1687 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1690 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1691 * @kcontrol: mixer control
1692 * @ucontrol: control element information
1694 * Callback to get the value of a dapm enumerated double mixer control.
1696 * Returns 0 for success.
1698 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1699 struct snd_ctl_elem_value *ucontrol)
1701 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1702 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1703 unsigned int val, bitmask;
1705 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1707 val = snd_soc_read(widget->codec, e->reg);
1708 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1709 if (e->shift_l != e->shift_r)
1710 ucontrol->value.enumerated.item[1] =
1711 (val >> e->shift_r) & (bitmask - 1);
1715 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1718 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1719 * @kcontrol: mixer control
1720 * @ucontrol: control element information
1722 * Callback to set the value of a dapm enumerated double mixer control.
1724 * Returns 0 for success.
1726 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1727 struct snd_ctl_elem_value *ucontrol)
1729 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1730 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1731 unsigned int val, mux, change;
1732 unsigned int mask, bitmask;
1735 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1737 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1739 mux = ucontrol->value.enumerated.item[0];
1740 val = mux << e->shift_l;
1741 mask = (bitmask - 1) << e->shift_l;
1742 if (e->shift_l != e->shift_r) {
1743 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1745 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1746 mask |= (bitmask - 1) << e->shift_r;
1749 mutex_lock(&widget->codec->mutex);
1750 widget->value = val;
1751 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1752 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1754 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1755 ret = widget->event(widget,
1756 kcontrol, SND_SOC_DAPM_PRE_REG);
1761 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1763 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1764 ret = widget->event(widget,
1765 kcontrol, SND_SOC_DAPM_POST_REG);
1768 mutex_unlock(&widget->codec->mutex);
1771 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1774 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1775 * @kcontrol: mixer control
1776 * @ucontrol: control element information
1778 * Returns 0 for success.
1780 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
1781 struct snd_ctl_elem_value *ucontrol)
1783 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1785 ucontrol->value.enumerated.item[0] = widget->value;
1789 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
1792 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1793 * @kcontrol: mixer control
1794 * @ucontrol: control element information
1796 * Returns 0 for success.
1798 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
1799 struct snd_ctl_elem_value *ucontrol)
1801 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1802 struct soc_enum *e =
1803 (struct soc_enum *)kcontrol->private_value;
1807 if (ucontrol->value.enumerated.item[0] >= e->max)
1810 mutex_lock(&widget->codec->mutex);
1812 change = widget->value != ucontrol->value.enumerated.item[0];
1813 widget->value = ucontrol->value.enumerated.item[0];
1814 dapm_mux_update_power(widget, kcontrol, change, widget->value, e);
1816 mutex_unlock(&widget->codec->mutex);
1819 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
1822 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1824 * @kcontrol: mixer control
1825 * @ucontrol: control element information
1827 * Callback to get the value of a dapm semi enumerated double mixer control.
1829 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1830 * used for handling bitfield coded enumeration for example.
1832 * Returns 0 for success.
1834 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1835 struct snd_ctl_elem_value *ucontrol)
1837 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1838 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1839 unsigned int reg_val, val, mux;
1841 reg_val = snd_soc_read(widget->codec, e->reg);
1842 val = (reg_val >> e->shift_l) & e->mask;
1843 for (mux = 0; mux < e->max; mux++) {
1844 if (val == e->values[mux])
1847 ucontrol->value.enumerated.item[0] = mux;
1848 if (e->shift_l != e->shift_r) {
1849 val = (reg_val >> e->shift_r) & e->mask;
1850 for (mux = 0; mux < e->max; mux++) {
1851 if (val == e->values[mux])
1854 ucontrol->value.enumerated.item[1] = mux;
1859 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1862 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1864 * @kcontrol: mixer control
1865 * @ucontrol: control element information
1867 * Callback to set the value of a dapm semi enumerated double mixer control.
1869 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1870 * used for handling bitfield coded enumeration for example.
1872 * Returns 0 for success.
1874 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1875 struct snd_ctl_elem_value *ucontrol)
1877 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1878 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1879 unsigned int val, mux, change;
1883 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1885 mux = ucontrol->value.enumerated.item[0];
1886 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1887 mask = e->mask << e->shift_l;
1888 if (e->shift_l != e->shift_r) {
1889 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1891 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1892 mask |= e->mask << e->shift_r;
1895 mutex_lock(&widget->codec->mutex);
1896 widget->value = val;
1897 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1898 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1900 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1901 ret = widget->event(widget,
1902 kcontrol, SND_SOC_DAPM_PRE_REG);
1907 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1909 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1910 ret = widget->event(widget,
1911 kcontrol, SND_SOC_DAPM_POST_REG);
1914 mutex_unlock(&widget->codec->mutex);
1917 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1920 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1922 * @kcontrol: mixer control
1923 * @uinfo: control element information
1925 * Callback to provide information about a pin switch control.
1927 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1928 struct snd_ctl_elem_info *uinfo)
1930 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1932 uinfo->value.integer.min = 0;
1933 uinfo->value.integer.max = 1;
1937 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1940 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1942 * @kcontrol: mixer control
1945 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1946 struct snd_ctl_elem_value *ucontrol)
1948 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1949 const char *pin = (const char *)kcontrol->private_value;
1951 mutex_lock(&codec->mutex);
1953 ucontrol->value.integer.value[0] =
1954 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
1956 mutex_unlock(&codec->mutex);
1960 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1963 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1965 * @kcontrol: mixer control
1968 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
1969 struct snd_ctl_elem_value *ucontrol)
1971 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1972 const char *pin = (const char *)kcontrol->private_value;
1974 mutex_lock(&codec->mutex);
1976 if (ucontrol->value.integer.value[0])
1977 snd_soc_dapm_enable_pin(&codec->dapm, pin);
1979 snd_soc_dapm_disable_pin(&codec->dapm, pin);
1981 snd_soc_dapm_sync(&codec->dapm);
1983 mutex_unlock(&codec->mutex);
1987 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
1990 * snd_soc_dapm_new_control - create new dapm control
1991 * @dapm: DAPM context
1992 * @widget: widget template
1994 * Creates a new dapm control based upon the template.
1996 * Returns 0 for success else error.
1998 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
1999 const struct snd_soc_dapm_widget *widget)
2001 struct snd_soc_dapm_widget *w;
2004 if ((w = dapm_cnew_widget(widget)) == NULL)
2007 name_len = strlen(widget->name) + 1;
2008 if (dapm->codec->name_prefix)
2009 name_len += 1 + strlen(dapm->codec->name_prefix);
2010 w->name = kmalloc(name_len, GFP_KERNEL);
2011 if (w->name == NULL) {
2015 if (dapm->codec->name_prefix)
2016 snprintf(w->name, name_len, "%s %s",
2017 dapm->codec->name_prefix, widget->name);
2019 snprintf(w->name, name_len, "%s", widget->name);
2022 w->codec = dapm->codec;
2023 INIT_LIST_HEAD(&w->sources);
2024 INIT_LIST_HEAD(&w->sinks);
2025 INIT_LIST_HEAD(&w->list);
2026 list_add(&w->list, &dapm->widgets);
2028 /* machine layer set ups unconnected pins and insertions */
2032 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2035 * snd_soc_dapm_new_controls - create new dapm controls
2036 * @dapm: DAPM context
2037 * @widget: widget array
2038 * @num: number of widgets
2040 * Creates new DAPM controls based upon the templates.
2042 * Returns 0 for success else error.
2044 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2045 const struct snd_soc_dapm_widget *widget,
2050 for (i = 0; i < num; i++) {
2051 ret = snd_soc_dapm_new_control(dapm, widget);
2054 "ASoC: Failed to create DAPM control %s: %d\n",
2062 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2064 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2065 const char *stream, int event)
2067 struct snd_soc_dapm_widget *w;
2069 list_for_each_entry(w, &dapm->widgets, list)
2073 dev_dbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2074 w->name, w->sname, stream, event);
2075 if (strstr(w->sname, stream)) {
2077 case SND_SOC_DAPM_STREAM_START:
2080 case SND_SOC_DAPM_STREAM_STOP:
2083 case SND_SOC_DAPM_STREAM_SUSPEND:
2084 case SND_SOC_DAPM_STREAM_RESUME:
2085 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2086 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2092 dapm_power_widgets(dapm, event);
2096 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2097 * @rtd: PCM runtime data
2098 * @stream: stream name
2099 * @event: stream event
2101 * Sends a stream event to the dapm core. The core then makes any
2102 * necessary widget power changes.
2104 * Returns 0 for success else error.
2106 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2107 const char *stream, int event)
2109 struct snd_soc_codec *codec = rtd->codec;
2114 mutex_lock(&codec->mutex);
2115 soc_dapm_stream_event(&codec->dapm, stream, event);
2116 mutex_unlock(&codec->mutex);
2119 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2122 * snd_soc_dapm_enable_pin - enable pin.
2123 * @dapm: DAPM context
2126 * Enables input/output pin and its parents or children widgets iff there is
2127 * a valid audio route and active audio stream.
2128 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2129 * do any widget power switching.
2131 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2133 return snd_soc_dapm_set_pin(dapm, pin, 1);
2135 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2138 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2139 * @dapm: DAPM context
2142 * Enables input/output pin regardless of any other state. This is
2143 * intended for use with microphone bias supplies used in microphone
2146 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2147 * do any widget power switching.
2149 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2152 struct snd_soc_dapm_widget *w;
2154 list_for_each_entry(w, &dapm->widgets, list) {
2155 if (!strcmp(w->name, pin)) {
2156 dev_dbg(w->dapm->dev,
2157 "dapm: force enable pin %s\n", pin);
2164 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2167 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2170 * snd_soc_dapm_disable_pin - disable pin.
2171 * @dapm: DAPM context
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_dapm_context *dapm,
2181 return snd_soc_dapm_set_pin(dapm, pin, 0);
2183 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2186 * snd_soc_dapm_nc_pin - permanently disable pin.
2187 * @dapm: DAPM context
2190 * Marks the specified pin as being not connected, disabling it along
2191 * any parent or child widgets. At present this is identical to
2192 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2193 * additional things such as disabling controls which only affect
2194 * paths through the pin.
2196 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2197 * do any widget power switching.
2199 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2201 return snd_soc_dapm_set_pin(dapm, pin, 0);
2203 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2206 * snd_soc_dapm_get_pin_status - get audio pin status
2207 * @dapm: DAPM context
2208 * @pin: audio signal pin endpoint (or start point)
2210 * Get audio pin status - connected or disconnected.
2212 * Returns 1 for connected otherwise 0.
2214 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2217 struct snd_soc_dapm_widget *w;
2219 list_for_each_entry(w, &dapm->widgets, list) {
2220 if (!strcmp(w->name, pin))
2221 return w->connected;
2226 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2229 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2230 * @dapm: DAPM context
2231 * @pin: audio signal pin endpoint (or start point)
2233 * Mark the given endpoint or pin as ignoring suspend. When the
2234 * system is disabled a path between two endpoints flagged as ignoring
2235 * suspend will not be disabled. The path must already be enabled via
2236 * normal means at suspend time, it will not be turned on if it was not
2239 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2242 struct snd_soc_dapm_widget *w;
2244 list_for_each_entry(w, &dapm->widgets, list) {
2245 if (!strcmp(w->name, pin)) {
2246 w->ignore_suspend = 1;
2251 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2254 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2257 * snd_soc_dapm_free - free dapm resources
2260 * Free all dapm widgets and resources.
2262 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2264 snd_soc_dapm_sys_remove(dapm->dev);
2265 dapm_free_widgets(dapm);
2267 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2269 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2271 struct snd_soc_dapm_widget *w;
2272 LIST_HEAD(down_list);
2275 list_for_each_entry(w, &dapm->widgets, list) {
2277 dapm_seq_insert(w, &down_list, dapm_down_seq);
2283 /* If there were no widgets to power down we're already in
2287 snd_soc_dapm_set_bias_level(NULL, dapm, SND_SOC_BIAS_PREPARE);
2288 dapm_seq_run(dapm, &down_list, 0, dapm_down_seq);
2289 snd_soc_dapm_set_bias_level(NULL, dapm, SND_SOC_BIAS_STANDBY);
2294 * snd_soc_dapm_shutdown - callback for system shutdown
2296 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2298 struct snd_soc_codec *codec;
2300 list_for_each_entry(codec, &card->codec_dev_list, list) {
2301 soc_dapm_shutdown_codec(&codec->dapm);
2302 snd_soc_dapm_set_bias_level(card, &codec->dapm, SND_SOC_BIAS_OFF);
2306 /* Module information */
2307 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2308 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2309 MODULE_LICENSE("GPL");