2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <linux/debugfs.h>
41 #include <sound/core.h>
42 #include <sound/pcm.h>
43 #include <sound/pcm_params.h>
44 #include <sound/soc-dapm.h>
45 #include <sound/initval.h>
47 /* dapm power sequences - make this per codec in the future */
48 static int dapm_up_seq[] = {
49 [snd_soc_dapm_pre] = 0,
50 [snd_soc_dapm_supply] = 1,
51 [snd_soc_dapm_micbias] = 2,
52 [snd_soc_dapm_aif_in] = 3,
53 [snd_soc_dapm_aif_out] = 3,
54 [snd_soc_dapm_mic] = 4,
55 [snd_soc_dapm_mux] = 5,
56 [snd_soc_dapm_value_mux] = 5,
57 [snd_soc_dapm_dac] = 6,
58 [snd_soc_dapm_mixer] = 7,
59 [snd_soc_dapm_mixer_named_ctl] = 7,
60 [snd_soc_dapm_pga] = 8,
61 [snd_soc_dapm_adc] = 9,
62 [snd_soc_dapm_hp] = 10,
63 [snd_soc_dapm_spk] = 10,
64 [snd_soc_dapm_post] = 11,
67 static int dapm_down_seq[] = {
68 [snd_soc_dapm_pre] = 0,
69 [snd_soc_dapm_adc] = 1,
70 [snd_soc_dapm_hp] = 2,
71 [snd_soc_dapm_spk] = 2,
72 [snd_soc_dapm_pga] = 4,
73 [snd_soc_dapm_mixer_named_ctl] = 5,
74 [snd_soc_dapm_mixer] = 5,
75 [snd_soc_dapm_dac] = 6,
76 [snd_soc_dapm_mic] = 7,
77 [snd_soc_dapm_micbias] = 8,
78 [snd_soc_dapm_mux] = 9,
79 [snd_soc_dapm_value_mux] = 9,
80 [snd_soc_dapm_aif_in] = 10,
81 [snd_soc_dapm_aif_out] = 10,
82 [snd_soc_dapm_supply] = 11,
83 [snd_soc_dapm_post] = 12,
86 static void pop_wait(u32 pop_time)
89 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
92 static void pop_dbg(u32 pop_time, const char *fmt, ...)
105 /* create a new dapm widget */
106 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
107 const struct snd_soc_dapm_widget *_widget)
109 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
113 * snd_soc_dapm_set_bias_level - set the bias level for the system
114 * @socdev: audio device
115 * @level: level to configure
117 * Configure the bias (power) levels for the SoC audio device.
119 * Returns 0 for success else error.
121 static int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
122 enum snd_soc_bias_level level)
124 struct snd_soc_card *card = socdev->card;
125 struct snd_soc_codec *codec = socdev->card->codec;
129 case SND_SOC_BIAS_ON:
130 dev_dbg(socdev->dev, "Setting full bias\n");
132 case SND_SOC_BIAS_PREPARE:
133 dev_dbg(socdev->dev, "Setting bias prepare\n");
135 case SND_SOC_BIAS_STANDBY:
136 dev_dbg(socdev->dev, "Setting standby bias\n");
138 case SND_SOC_BIAS_OFF:
139 dev_dbg(socdev->dev, "Setting bias off\n");
142 dev_err(socdev->dev, "Setting invalid bias %d\n", level);
146 if (card->set_bias_level)
147 ret = card->set_bias_level(card, level);
149 if (codec->set_bias_level)
150 ret = codec->set_bias_level(codec, level);
152 codec->bias_level = level;
158 /* set up initial codec paths */
159 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
160 struct snd_soc_dapm_path *p, int i)
163 case snd_soc_dapm_switch:
164 case snd_soc_dapm_mixer:
165 case snd_soc_dapm_mixer_named_ctl: {
167 struct soc_mixer_control *mc = (struct soc_mixer_control *)
168 w->kcontrols[i].private_value;
169 unsigned int reg = mc->reg;
170 unsigned int shift = mc->shift;
172 unsigned int mask = (1 << fls(max)) - 1;
173 unsigned int invert = mc->invert;
175 val = snd_soc_read(w->codec, reg);
176 val = (val >> shift) & mask;
178 if ((invert && !val) || (!invert && val))
184 case snd_soc_dapm_mux: {
185 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
186 int val, item, bitmask;
188 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
190 val = snd_soc_read(w->codec, e->reg);
191 item = (val >> e->shift_l) & (bitmask - 1);
194 for (i = 0; i < e->max; i++) {
195 if (!(strcmp(p->name, e->texts[i])) && item == i)
200 case snd_soc_dapm_value_mux: {
201 struct soc_enum *e = (struct soc_enum *)
202 w->kcontrols[i].private_value;
205 val = snd_soc_read(w->codec, e->reg);
206 val = (val >> e->shift_l) & e->mask;
207 for (item = 0; item < e->max; item++) {
208 if (val == e->values[item])
213 for (i = 0; i < e->max; i++) {
214 if (!(strcmp(p->name, e->texts[i])) && item == i)
219 /* does not effect routing - always connected */
220 case snd_soc_dapm_pga:
221 case snd_soc_dapm_output:
222 case snd_soc_dapm_adc:
223 case snd_soc_dapm_input:
224 case snd_soc_dapm_dac:
225 case snd_soc_dapm_micbias:
226 case snd_soc_dapm_vmid:
227 case snd_soc_dapm_supply:
228 case snd_soc_dapm_aif_in:
229 case snd_soc_dapm_aif_out:
232 /* does effect routing - dynamically connected */
233 case snd_soc_dapm_hp:
234 case snd_soc_dapm_mic:
235 case snd_soc_dapm_spk:
236 case snd_soc_dapm_line:
237 case snd_soc_dapm_pre:
238 case snd_soc_dapm_post:
244 /* connect mux widget to its interconnecting audio paths */
245 static int dapm_connect_mux(struct snd_soc_codec *codec,
246 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
247 struct snd_soc_dapm_path *path, const char *control_name,
248 const struct snd_kcontrol_new *kcontrol)
250 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
253 for (i = 0; i < e->max; i++) {
254 if (!(strcmp(control_name, e->texts[i]))) {
255 list_add(&path->list, &codec->dapm_paths);
256 list_add(&path->list_sink, &dest->sources);
257 list_add(&path->list_source, &src->sinks);
258 path->name = (char*)e->texts[i];
259 dapm_set_path_status(dest, path, 0);
267 /* connect mixer widget to its interconnecting audio paths */
268 static int dapm_connect_mixer(struct snd_soc_codec *codec,
269 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
270 struct snd_soc_dapm_path *path, const char *control_name)
274 /* search for mixer kcontrol */
275 for (i = 0; i < dest->num_kcontrols; i++) {
276 if (!strcmp(control_name, dest->kcontrols[i].name)) {
277 list_add(&path->list, &codec->dapm_paths);
278 list_add(&path->list_sink, &dest->sources);
279 list_add(&path->list_source, &src->sinks);
280 path->name = dest->kcontrols[i].name;
281 dapm_set_path_status(dest, path, i);
288 /* update dapm codec register bits */
289 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
292 unsigned int old, new;
293 struct snd_soc_codec *codec = widget->codec;
295 /* check for valid widgets */
296 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
297 widget->id == snd_soc_dapm_output ||
298 widget->id == snd_soc_dapm_hp ||
299 widget->id == snd_soc_dapm_mic ||
300 widget->id == snd_soc_dapm_line ||
301 widget->id == snd_soc_dapm_spk)
304 power = widget->power;
306 power = (power ? 0:1);
308 old = snd_soc_read(codec, widget->reg);
309 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
313 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
314 widget->name, widget->power ? "on" : "off",
316 pop_wait(codec->pop_time);
317 snd_soc_write(codec, widget->reg, new);
319 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
324 /* create new dapm mixer control */
325 static int dapm_new_mixer(struct snd_soc_codec *codec,
326 struct snd_soc_dapm_widget *w)
330 struct snd_soc_dapm_path *path;
333 for (i = 0; i < w->num_kcontrols; i++) {
336 list_for_each_entry(path, &w->sources, list_sink) {
338 /* mixer/mux paths name must match control name */
339 if (path->name != (char*)w->kcontrols[i].name)
342 /* add dapm control with long name.
343 * for dapm_mixer this is the concatenation of the
344 * mixer and kcontrol name.
345 * for dapm_mixer_named_ctl this is simply the
348 name_len = strlen(w->kcontrols[i].name) + 1;
349 if (w->id != snd_soc_dapm_mixer_named_ctl)
350 name_len += 1 + strlen(w->name);
352 path->long_name = kmalloc(name_len, GFP_KERNEL);
354 if (path->long_name == NULL)
359 snprintf(path->long_name, name_len, "%s %s",
360 w->name, w->kcontrols[i].name);
362 case snd_soc_dapm_mixer_named_ctl:
363 snprintf(path->long_name, name_len, "%s",
364 w->kcontrols[i].name);
368 path->long_name[name_len - 1] = '\0';
370 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
372 ret = snd_ctl_add(codec->card, path->kcontrol);
374 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s: %d\n",
377 kfree(path->long_name);
378 path->long_name = NULL;
386 /* create new dapm mux control */
387 static int dapm_new_mux(struct snd_soc_codec *codec,
388 struct snd_soc_dapm_widget *w)
390 struct snd_soc_dapm_path *path = NULL;
391 struct snd_kcontrol *kcontrol;
394 if (!w->num_kcontrols) {
395 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
399 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
400 ret = snd_ctl_add(codec->card, kcontrol);
404 list_for_each_entry(path, &w->sources, list_sink)
405 path->kcontrol = kcontrol;
410 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
414 /* create new dapm volume control */
415 static int dapm_new_pga(struct snd_soc_codec *codec,
416 struct snd_soc_dapm_widget *w)
418 if (w->num_kcontrols)
419 pr_err("asoc: PGA controls not supported: '%s'\n", w->name);
424 /* reset 'walked' bit for each dapm path */
425 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
427 struct snd_soc_dapm_path *p;
429 list_for_each_entry(p, &codec->dapm_paths, list)
433 /* We implement power down on suspend by checking the power state of
434 * the ALSA card - when we are suspending the ALSA state for the card
437 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
439 struct snd_soc_codec *codec = widget->codec;
441 switch (snd_power_get_state(codec->card)) {
442 case SNDRV_CTL_POWER_D3hot:
443 case SNDRV_CTL_POWER_D3cold:
451 * Recursively check for a completed path to an active or physically connected
452 * output widget. Returns number of complete paths.
454 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
456 struct snd_soc_dapm_path *path;
459 if (widget->id == snd_soc_dapm_supply)
462 switch (widget->id) {
463 case snd_soc_dapm_adc:
464 case snd_soc_dapm_aif_out:
466 return snd_soc_dapm_suspend_check(widget);
471 if (widget->connected) {
472 /* connected pin ? */
473 if (widget->id == snd_soc_dapm_output && !widget->ext)
474 return snd_soc_dapm_suspend_check(widget);
476 /* connected jack or spk ? */
477 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
478 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
479 return snd_soc_dapm_suspend_check(widget);
482 list_for_each_entry(path, &widget->sinks, list_source) {
486 if (path->sink && path->connect) {
488 con += is_connected_output_ep(path->sink);
496 * Recursively check for a completed path to an active or physically connected
497 * input widget. Returns number of complete paths.
499 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
501 struct snd_soc_dapm_path *path;
504 if (widget->id == snd_soc_dapm_supply)
507 /* active stream ? */
508 switch (widget->id) {
509 case snd_soc_dapm_dac:
510 case snd_soc_dapm_aif_in:
512 return snd_soc_dapm_suspend_check(widget);
517 if (widget->connected) {
518 /* connected pin ? */
519 if (widget->id == snd_soc_dapm_input && !widget->ext)
520 return snd_soc_dapm_suspend_check(widget);
522 /* connected VMID/Bias for lower pops */
523 if (widget->id == snd_soc_dapm_vmid)
524 return snd_soc_dapm_suspend_check(widget);
526 /* connected jack ? */
527 if (widget->id == snd_soc_dapm_mic ||
528 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
529 return snd_soc_dapm_suspend_check(widget);
532 list_for_each_entry(path, &widget->sources, list_sink) {
536 if (path->source && path->connect) {
538 con += is_connected_input_ep(path->source);
546 * Handler for generic register modifier widget.
548 int dapm_reg_event(struct snd_soc_dapm_widget *w,
549 struct snd_kcontrol *kcontrol, int event)
553 if (SND_SOC_DAPM_EVENT_ON(event))
558 snd_soc_update_bits(w->codec, -(w->reg + 1),
559 w->mask << w->shift, val << w->shift);
563 EXPORT_SYMBOL_GPL(dapm_reg_event);
565 /* Standard power change method, used to apply power changes to most
568 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
572 /* call any power change event handlers */
574 pr_debug("power %s event for %s flags %x\n",
575 w->power ? "on" : "off",
576 w->name, w->event_flags);
578 /* power up pre event */
579 if (w->power && w->event &&
580 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
581 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
586 /* power down pre event */
587 if (!w->power && w->event &&
588 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
589 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
596 /* power up post event */
597 if (w->power && w->event &&
598 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
600 NULL, SND_SOC_DAPM_POST_PMU);
605 /* power down post event */
606 if (!w->power && w->event &&
607 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
608 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
616 /* Generic check to see if a widget should be powered.
618 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
622 in = is_connected_input_ep(w);
623 dapm_clear_walk(w->codec);
624 out = is_connected_output_ep(w);
625 dapm_clear_walk(w->codec);
626 return out != 0 && in != 0;
629 /* Check to see if an ADC has power */
630 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
635 in = is_connected_input_ep(w);
636 dapm_clear_walk(w->codec);
639 return dapm_generic_check_power(w);
643 /* Check to see if a DAC has power */
644 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
649 out = is_connected_output_ep(w);
650 dapm_clear_walk(w->codec);
653 return dapm_generic_check_power(w);
657 /* Check to see if a power supply is needed */
658 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
660 struct snd_soc_dapm_path *path;
663 /* Check if one of our outputs is connected */
664 list_for_each_entry(path, &w->sinks, list_source) {
665 if (path->connected &&
666 !path->connected(path->source, path->sink))
669 if (path->sink && path->sink->power_check &&
670 path->sink->power_check(path->sink)) {
676 dapm_clear_walk(w->codec);
681 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
682 struct snd_soc_dapm_widget *b,
685 if (a->codec != b->codec)
686 return (unsigned long)a - (unsigned long)b;
687 if (sort[a->id] != sort[b->id])
688 return sort[a->id] - sort[b->id];
689 if (a->reg != b->reg)
690 return a->reg - b->reg;
695 /* Insert a widget in order into a DAPM power sequence. */
696 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
697 struct list_head *list,
700 struct snd_soc_dapm_widget *w;
702 list_for_each_entry(w, list, power_list)
703 if (dapm_seq_compare(new_widget, w, sort) < 0) {
704 list_add_tail(&new_widget->power_list, &w->power_list);
708 list_add_tail(&new_widget->power_list, list);
711 /* Apply the coalesced changes from a DAPM sequence */
712 static void dapm_seq_run_coalesced(struct snd_soc_codec *codec,
713 struct list_head *pending)
715 struct snd_soc_dapm_widget *w;
717 unsigned int value = 0;
718 unsigned int mask = 0;
719 unsigned int cur_mask;
721 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
724 list_for_each_entry(w, pending, power_list) {
725 cur_mask = 1 << w->shift;
726 BUG_ON(reg != w->reg);
737 pop_dbg(codec->pop_time,
738 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
739 w->name, reg, value, mask);
741 /* power up pre event */
742 if (w->power && w->event &&
743 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
744 pop_dbg(codec->pop_time, "pop test : %s PRE_PMU\n",
746 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
748 pr_err("%s: pre event failed: %d\n",
752 /* power down pre event */
753 if (!w->power && w->event &&
754 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
755 pop_dbg(codec->pop_time, "pop test : %s PRE_PMD\n",
757 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
759 pr_err("%s: pre event failed: %d\n",
765 pop_dbg(codec->pop_time,
766 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
767 value, mask, reg, codec->pop_time);
768 pop_wait(codec->pop_time);
769 snd_soc_update_bits(codec, reg, mask, value);
772 list_for_each_entry(w, pending, power_list) {
773 /* power up post event */
774 if (w->power && w->event &&
775 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
776 pop_dbg(codec->pop_time, "pop test : %s POST_PMU\n",
779 NULL, SND_SOC_DAPM_POST_PMU);
781 pr_err("%s: post event failed: %d\n",
785 /* power down post event */
786 if (!w->power && w->event &&
787 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
788 pop_dbg(codec->pop_time, "pop test : %s POST_PMD\n",
790 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
792 pr_err("%s: post event failed: %d\n",
798 /* Apply a DAPM power sequence.
800 * We walk over a pre-sorted list of widgets to apply power to. In
801 * order to minimise the number of writes to the device required
802 * multiple widgets will be updated in a single write where possible.
803 * Currently anything that requires more than a single write is not
806 static void dapm_seq_run(struct snd_soc_codec *codec, struct list_head *list,
807 int event, int sort[])
809 struct snd_soc_dapm_widget *w, *n;
812 int cur_reg = SND_SOC_NOPM;
815 list_for_each_entry_safe(w, n, list, power_list) {
818 /* Do we need to apply any queued changes? */
819 if (sort[w->id] != cur_sort || w->reg != cur_reg) {
820 if (!list_empty(&pending))
821 dapm_seq_run_coalesced(codec, &pending);
823 INIT_LIST_HEAD(&pending);
825 cur_reg = SND_SOC_NOPM;
829 case snd_soc_dapm_pre:
831 list_for_each_entry_safe_continue(w, n, list,
834 if (event == SND_SOC_DAPM_STREAM_START)
836 NULL, SND_SOC_DAPM_PRE_PMU);
837 else if (event == SND_SOC_DAPM_STREAM_STOP)
839 NULL, SND_SOC_DAPM_PRE_PMD);
842 case snd_soc_dapm_post:
844 list_for_each_entry_safe_continue(w, n, list,
847 if (event == SND_SOC_DAPM_STREAM_START)
849 NULL, SND_SOC_DAPM_POST_PMU);
850 else if (event == SND_SOC_DAPM_STREAM_STOP)
852 NULL, SND_SOC_DAPM_POST_PMD);
855 case snd_soc_dapm_input:
856 case snd_soc_dapm_output:
857 case snd_soc_dapm_hp:
858 case snd_soc_dapm_mic:
859 case snd_soc_dapm_line:
860 case snd_soc_dapm_spk:
861 /* No register support currently */
862 ret = dapm_generic_apply_power(w);
866 /* Queue it up for application */
867 cur_sort = sort[w->id];
869 list_move(&w->power_list, &pending);
874 pr_err("Failed to apply widget power: %d\n",
878 if (!list_empty(&pending))
879 dapm_seq_run_coalesced(codec, &pending);
883 * Scan each dapm widget for complete audio path.
884 * A complete path is a route that has valid endpoints i.e.:-
886 * o DAC to output pin.
887 * o Input Pin to ADC.
888 * o Input pin to Output pin (bypass, sidetone)
889 * o DAC to ADC (loopback).
891 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
893 struct snd_soc_device *socdev = codec->socdev;
894 struct snd_soc_dapm_widget *w;
896 LIST_HEAD(down_list);
901 /* Check which widgets we need to power and store them in
902 * lists indicating if they should be powered up or down.
904 list_for_each_entry(w, &codec->dapm_widgets, list) {
906 case snd_soc_dapm_pre:
907 dapm_seq_insert(w, &down_list, dapm_down_seq);
909 case snd_soc_dapm_post:
910 dapm_seq_insert(w, &up_list, dapm_up_seq);
918 power = w->power_check(w);
924 if (w->power == power)
928 dapm_seq_insert(w, &up_list, dapm_up_seq);
930 dapm_seq_insert(w, &down_list, dapm_down_seq);
937 /* If there are no DAPM widgets then try to figure out power from the
940 if (list_empty(&codec->dapm_widgets)) {
942 case SND_SOC_DAPM_STREAM_START:
943 case SND_SOC_DAPM_STREAM_RESUME:
946 case SND_SOC_DAPM_STREAM_SUSPEND:
949 case SND_SOC_DAPM_STREAM_NOP:
950 switch (codec->bias_level) {
951 case SND_SOC_BIAS_STANDBY:
952 case SND_SOC_BIAS_OFF:
965 if (sys_power && codec->bias_level == SND_SOC_BIAS_OFF) {
966 ret = snd_soc_dapm_set_bias_level(socdev,
967 SND_SOC_BIAS_STANDBY);
969 pr_err("Failed to turn on bias: %d\n", ret);
972 /* If we're changing to all on or all off then prepare */
973 if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
974 (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {
975 ret = snd_soc_dapm_set_bias_level(socdev,
976 SND_SOC_BIAS_PREPARE);
978 pr_err("Failed to prepare bias: %d\n", ret);
981 /* Power down widgets first; try to avoid amplifying pops. */
982 dapm_seq_run(codec, &down_list, event, dapm_down_seq);
985 dapm_seq_run(codec, &up_list, event, dapm_up_seq);
987 /* If we just powered the last thing off drop to standby bias */
988 if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
989 ret = snd_soc_dapm_set_bias_level(socdev,
990 SND_SOC_BIAS_STANDBY);
992 pr_err("Failed to apply standby bias: %d\n", ret);
995 /* If we're in standby and can support bias off then do that */
996 if (codec->bias_level == SND_SOC_BIAS_STANDBY &&
997 codec->idle_bias_off) {
998 ret = snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF);
1000 pr_err("Failed to turn off bias: %d\n", ret);
1003 /* If we just powered up then move to active bias */
1004 if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
1005 ret = snd_soc_dapm_set_bias_level(socdev,
1008 pr_err("Failed to apply active bias: %d\n", ret);
1011 pop_dbg(codec->pop_time, "DAPM sequencing finished, waiting %dms\n",
1013 pop_wait(codec->pop_time);
1018 #ifdef CONFIG_DEBUG_FS
1019 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1021 file->private_data = inode->i_private;
1025 static ssize_t dapm_widget_power_read_file(struct file *file,
1026 char __user *user_buf,
1027 size_t count, loff_t *ppos)
1029 struct snd_soc_dapm_widget *w = file->private_data;
1033 struct snd_soc_dapm_path *p = NULL;
1035 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1039 in = is_connected_input_ep(w);
1040 dapm_clear_walk(w->codec);
1041 out = is_connected_output_ep(w);
1042 dapm_clear_walk(w->codec);
1044 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1045 w->name, w->power ? "On" : "Off", in, out);
1048 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1049 " - R%d(0x%x) bit %d",
1050 w->reg, w->reg, w->shift);
1052 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1055 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1057 w->active ? "active" : "inactive");
1059 list_for_each_entry(p, &w->sources, list_sink) {
1060 if (p->connected && !p->connected(w, p->sink))
1064 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1066 p->name ? p->name : "static",
1069 list_for_each_entry(p, &w->sinks, list_source) {
1070 if (p->connected && !p->connected(w, p->sink))
1074 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1076 p->name ? p->name : "static",
1080 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1086 static const struct file_operations dapm_widget_power_fops = {
1087 .open = dapm_widget_power_open_file,
1088 .read = dapm_widget_power_read_file,
1091 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1093 struct snd_soc_dapm_widget *w;
1096 if (!codec->debugfs_dapm)
1099 list_for_each_entry(w, &codec->dapm_widgets, list) {
1103 d = debugfs_create_file(w->name, 0444,
1104 codec->debugfs_dapm, w,
1105 &dapm_widget_power_fops);
1108 "ASoC: Failed to create %s debugfs file\n",
1113 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1118 /* test and update the power status of a mux widget */
1119 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1120 struct snd_kcontrol *kcontrol, int change,
1121 int mux, struct soc_enum *e)
1123 struct snd_soc_dapm_path *path;
1126 if (widget->id != snd_soc_dapm_mux &&
1127 widget->id != snd_soc_dapm_value_mux)
1133 /* find dapm widget path assoc with kcontrol */
1134 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1135 if (path->kcontrol != kcontrol)
1138 if (!path->name || !e->texts[mux])
1142 /* we now need to match the string in the enum to the path */
1143 if (!(strcmp(path->name, e->texts[mux])))
1144 path->connect = 1; /* new connection */
1146 path->connect = 0; /* old connection must be powered down */
1150 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1155 /* test and update the power status of a mixer or switch widget */
1156 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1157 struct snd_kcontrol *kcontrol, int connect)
1159 struct snd_soc_dapm_path *path;
1162 if (widget->id != snd_soc_dapm_mixer &&
1163 widget->id != snd_soc_dapm_mixer_named_ctl &&
1164 widget->id != snd_soc_dapm_switch)
1167 /* find dapm widget path assoc with kcontrol */
1168 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1169 if (path->kcontrol != kcontrol)
1172 /* found, now check type */
1174 path->connect = connect;
1179 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1184 /* show dapm widget status in sys fs */
1185 static ssize_t dapm_widget_show(struct device *dev,
1186 struct device_attribute *attr, char *buf)
1188 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1189 struct snd_soc_codec *codec = devdata->card->codec;
1190 struct snd_soc_dapm_widget *w;
1192 char *state = "not set";
1194 list_for_each_entry(w, &codec->dapm_widgets, list) {
1196 /* only display widgets that burnm power */
1198 case snd_soc_dapm_hp:
1199 case snd_soc_dapm_mic:
1200 case snd_soc_dapm_spk:
1201 case snd_soc_dapm_line:
1202 case snd_soc_dapm_micbias:
1203 case snd_soc_dapm_dac:
1204 case snd_soc_dapm_adc:
1205 case snd_soc_dapm_pga:
1206 case snd_soc_dapm_mixer:
1207 case snd_soc_dapm_mixer_named_ctl:
1208 case snd_soc_dapm_supply:
1210 count += sprintf(buf + count, "%s: %s\n",
1211 w->name, w->power ? "On":"Off");
1218 switch (codec->bias_level) {
1219 case SND_SOC_BIAS_ON:
1222 case SND_SOC_BIAS_PREPARE:
1225 case SND_SOC_BIAS_STANDBY:
1228 case SND_SOC_BIAS_OFF:
1232 count += sprintf(buf + count, "PM State: %s\n", state);
1237 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1239 int snd_soc_dapm_sys_add(struct device *dev)
1241 return device_create_file(dev, &dev_attr_dapm_widget);
1244 static void snd_soc_dapm_sys_remove(struct device *dev)
1246 device_remove_file(dev, &dev_attr_dapm_widget);
1249 /* free all dapm widgets and resources */
1250 static void dapm_free_widgets(struct snd_soc_codec *codec)
1252 struct snd_soc_dapm_widget *w, *next_w;
1253 struct snd_soc_dapm_path *p, *next_p;
1255 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
1260 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
1262 kfree(p->long_name);
1267 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
1268 const char *pin, int status)
1270 struct snd_soc_dapm_widget *w;
1272 list_for_each_entry(w, &codec->dapm_widgets, list) {
1273 if (!strcmp(w->name, pin)) {
1274 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
1275 w->connected = status;
1276 /* Allow disabling of forced pins */
1283 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
1288 * snd_soc_dapm_sync - scan and power dapm paths
1289 * @codec: audio codec
1291 * Walks all dapm audio paths and powers widgets according to their
1292 * stream or path usage.
1294 * Returns 0 for success.
1296 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
1298 return dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1300 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1302 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
1303 const struct snd_soc_dapm_route *route)
1305 struct snd_soc_dapm_path *path;
1306 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1307 const char *sink = route->sink;
1308 const char *control = route->control;
1309 const char *source = route->source;
1312 /* find src and dest widgets */
1313 list_for_each_entry(w, &codec->dapm_widgets, list) {
1315 if (!wsink && !(strcmp(w->name, sink))) {
1319 if (!wsource && !(strcmp(w->name, source))) {
1324 if (wsource == NULL || wsink == NULL)
1327 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1331 path->source = wsource;
1333 path->connected = route->connected;
1334 INIT_LIST_HEAD(&path->list);
1335 INIT_LIST_HEAD(&path->list_source);
1336 INIT_LIST_HEAD(&path->list_sink);
1338 /* check for external widgets */
1339 if (wsink->id == snd_soc_dapm_input) {
1340 if (wsource->id == snd_soc_dapm_micbias ||
1341 wsource->id == snd_soc_dapm_mic ||
1342 wsource->id == snd_soc_dapm_line ||
1343 wsource->id == snd_soc_dapm_output)
1346 if (wsource->id == snd_soc_dapm_output) {
1347 if (wsink->id == snd_soc_dapm_spk ||
1348 wsink->id == snd_soc_dapm_hp ||
1349 wsink->id == snd_soc_dapm_line ||
1350 wsink->id == snd_soc_dapm_input)
1354 /* connect static paths */
1355 if (control == NULL) {
1356 list_add(&path->list, &codec->dapm_paths);
1357 list_add(&path->list_sink, &wsink->sources);
1358 list_add(&path->list_source, &wsource->sinks);
1363 /* connect dynamic paths */
1365 case snd_soc_dapm_adc:
1366 case snd_soc_dapm_dac:
1367 case snd_soc_dapm_pga:
1368 case snd_soc_dapm_input:
1369 case snd_soc_dapm_output:
1370 case snd_soc_dapm_micbias:
1371 case snd_soc_dapm_vmid:
1372 case snd_soc_dapm_pre:
1373 case snd_soc_dapm_post:
1374 case snd_soc_dapm_supply:
1375 case snd_soc_dapm_aif_in:
1376 case snd_soc_dapm_aif_out:
1377 list_add(&path->list, &codec->dapm_paths);
1378 list_add(&path->list_sink, &wsink->sources);
1379 list_add(&path->list_source, &wsource->sinks);
1382 case snd_soc_dapm_mux:
1383 case snd_soc_dapm_value_mux:
1384 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1385 &wsink->kcontrols[0]);
1389 case snd_soc_dapm_switch:
1390 case snd_soc_dapm_mixer:
1391 case snd_soc_dapm_mixer_named_ctl:
1392 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1396 case snd_soc_dapm_hp:
1397 case snd_soc_dapm_mic:
1398 case snd_soc_dapm_line:
1399 case snd_soc_dapm_spk:
1400 list_add(&path->list, &codec->dapm_paths);
1401 list_add(&path->list_sink, &wsink->sources);
1402 list_add(&path->list_source, &wsource->sinks);
1409 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1416 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1418 * @route: audio routes
1419 * @num: number of routes
1421 * Connects 2 dapm widgets together via a named audio path. The sink is
1422 * the widget receiving the audio signal, whilst the source is the sender
1423 * of the audio signal.
1425 * Returns 0 for success else error. On error all resources can be freed
1426 * with a call to snd_soc_card_free().
1428 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1429 const struct snd_soc_dapm_route *route, int num)
1433 for (i = 0; i < num; i++) {
1434 ret = snd_soc_dapm_add_route(codec, route);
1436 printk(KERN_ERR "Failed to add route %s->%s\n",
1446 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1449 * snd_soc_dapm_new_widgets - add new dapm widgets
1450 * @codec: audio codec
1452 * Checks the codec for any new dapm widgets and creates them if found.
1454 * Returns 0 for success.
1456 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1458 struct snd_soc_dapm_widget *w;
1460 list_for_each_entry(w, &codec->dapm_widgets, list)
1466 case snd_soc_dapm_switch:
1467 case snd_soc_dapm_mixer:
1468 case snd_soc_dapm_mixer_named_ctl:
1469 w->power_check = dapm_generic_check_power;
1470 dapm_new_mixer(codec, w);
1472 case snd_soc_dapm_mux:
1473 case snd_soc_dapm_value_mux:
1474 w->power_check = dapm_generic_check_power;
1475 dapm_new_mux(codec, w);
1477 case snd_soc_dapm_adc:
1478 case snd_soc_dapm_aif_out:
1479 w->power_check = dapm_adc_check_power;
1481 case snd_soc_dapm_dac:
1482 case snd_soc_dapm_aif_in:
1483 w->power_check = dapm_dac_check_power;
1485 case snd_soc_dapm_pga:
1486 w->power_check = dapm_generic_check_power;
1487 dapm_new_pga(codec, w);
1489 case snd_soc_dapm_input:
1490 case snd_soc_dapm_output:
1491 case snd_soc_dapm_micbias:
1492 case snd_soc_dapm_spk:
1493 case snd_soc_dapm_hp:
1494 case snd_soc_dapm_mic:
1495 case snd_soc_dapm_line:
1496 w->power_check = dapm_generic_check_power;
1498 case snd_soc_dapm_supply:
1499 w->power_check = dapm_supply_check_power;
1500 case snd_soc_dapm_vmid:
1501 case snd_soc_dapm_pre:
1502 case snd_soc_dapm_post:
1508 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1511 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1514 * snd_soc_dapm_get_volsw - dapm mixer get callback
1515 * @kcontrol: mixer control
1516 * @ucontrol: control element information
1518 * Callback to get the value of a dapm mixer control.
1520 * Returns 0 for success.
1522 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1523 struct snd_ctl_elem_value *ucontrol)
1525 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1526 struct soc_mixer_control *mc =
1527 (struct soc_mixer_control *)kcontrol->private_value;
1528 unsigned int reg = mc->reg;
1529 unsigned int shift = mc->shift;
1530 unsigned int rshift = mc->rshift;
1532 unsigned int invert = mc->invert;
1533 unsigned int mask = (1 << fls(max)) - 1;
1535 ucontrol->value.integer.value[0] =
1536 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1537 if (shift != rshift)
1538 ucontrol->value.integer.value[1] =
1539 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1541 ucontrol->value.integer.value[0] =
1542 max - ucontrol->value.integer.value[0];
1543 if (shift != rshift)
1544 ucontrol->value.integer.value[1] =
1545 max - ucontrol->value.integer.value[1];
1550 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1553 * snd_soc_dapm_put_volsw - dapm mixer set callback
1554 * @kcontrol: mixer control
1555 * @ucontrol: control element information
1557 * Callback to set the value of a dapm mixer control.
1559 * Returns 0 for success.
1561 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1562 struct snd_ctl_elem_value *ucontrol)
1564 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1565 struct soc_mixer_control *mc =
1566 (struct soc_mixer_control *)kcontrol->private_value;
1567 unsigned int reg = mc->reg;
1568 unsigned int shift = mc->shift;
1569 unsigned int rshift = mc->rshift;
1571 unsigned int mask = (1 << fls(max)) - 1;
1572 unsigned int invert = mc->invert;
1573 unsigned int val, val2, val_mask;
1577 val = (ucontrol->value.integer.value[0] & mask);
1581 val_mask = mask << shift;
1583 if (shift != rshift) {
1584 val2 = (ucontrol->value.integer.value[1] & mask);
1587 val_mask |= mask << rshift;
1588 val |= val2 << rshift;
1591 mutex_lock(&widget->codec->mutex);
1592 widget->value = val;
1594 if (snd_soc_test_bits(widget->codec, reg, val_mask, val)) {
1596 /* new connection */
1597 connect = invert ? 0:1;
1599 /* old connection must be powered down */
1600 connect = invert ? 1:0;
1602 dapm_mixer_update_power(widget, kcontrol, connect);
1605 if (widget->event) {
1606 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1607 ret = widget->event(widget, kcontrol,
1608 SND_SOC_DAPM_PRE_REG);
1614 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1615 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1616 ret = widget->event(widget, kcontrol,
1617 SND_SOC_DAPM_POST_REG);
1619 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1622 mutex_unlock(&widget->codec->mutex);
1625 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1628 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1629 * @kcontrol: mixer control
1630 * @ucontrol: control element information
1632 * Callback to get the value of a dapm enumerated double mixer control.
1634 * Returns 0 for success.
1636 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1637 struct snd_ctl_elem_value *ucontrol)
1639 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1640 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1641 unsigned int val, bitmask;
1643 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1645 val = snd_soc_read(widget->codec, e->reg);
1646 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1647 if (e->shift_l != e->shift_r)
1648 ucontrol->value.enumerated.item[1] =
1649 (val >> e->shift_r) & (bitmask - 1);
1653 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1656 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1657 * @kcontrol: mixer control
1658 * @ucontrol: control element information
1660 * Callback to set the value of a dapm enumerated double mixer control.
1662 * Returns 0 for success.
1664 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1665 struct snd_ctl_elem_value *ucontrol)
1667 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1668 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1669 unsigned int val, mux, change;
1670 unsigned int mask, bitmask;
1673 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1675 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1677 mux = ucontrol->value.enumerated.item[0];
1678 val = mux << e->shift_l;
1679 mask = (bitmask - 1) << e->shift_l;
1680 if (e->shift_l != e->shift_r) {
1681 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1683 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1684 mask |= (bitmask - 1) << e->shift_r;
1687 mutex_lock(&widget->codec->mutex);
1688 widget->value = val;
1689 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1690 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1692 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1693 ret = widget->event(widget,
1694 kcontrol, SND_SOC_DAPM_PRE_REG);
1699 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1701 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1702 ret = widget->event(widget,
1703 kcontrol, SND_SOC_DAPM_POST_REG);
1706 mutex_unlock(&widget->codec->mutex);
1709 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1712 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1713 * @kcontrol: mixer control
1714 * @ucontrol: control element information
1716 * Returns 0 for success.
1718 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
1719 struct snd_ctl_elem_value *ucontrol)
1721 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1723 ucontrol->value.enumerated.item[0] = widget->value;
1727 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
1730 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1731 * @kcontrol: mixer control
1732 * @ucontrol: control element information
1734 * Returns 0 for success.
1736 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
1737 struct snd_ctl_elem_value *ucontrol)
1739 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1740 struct soc_enum *e =
1741 (struct soc_enum *)kcontrol->private_value;
1745 if (ucontrol->value.enumerated.item[0] >= e->max)
1748 mutex_lock(&widget->codec->mutex);
1750 change = widget->value != ucontrol->value.enumerated.item[0];
1751 widget->value = ucontrol->value.enumerated.item[0];
1752 dapm_mux_update_power(widget, kcontrol, change, widget->value, e);
1754 mutex_unlock(&widget->codec->mutex);
1757 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
1760 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1762 * @kcontrol: mixer control
1763 * @ucontrol: control element information
1765 * Callback to get the value of a dapm semi enumerated double mixer control.
1767 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1768 * used for handling bitfield coded enumeration for example.
1770 * Returns 0 for success.
1772 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1773 struct snd_ctl_elem_value *ucontrol)
1775 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1776 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1777 unsigned int reg_val, val, mux;
1779 reg_val = snd_soc_read(widget->codec, e->reg);
1780 val = (reg_val >> e->shift_l) & e->mask;
1781 for (mux = 0; mux < e->max; mux++) {
1782 if (val == e->values[mux])
1785 ucontrol->value.enumerated.item[0] = mux;
1786 if (e->shift_l != e->shift_r) {
1787 val = (reg_val >> e->shift_r) & e->mask;
1788 for (mux = 0; mux < e->max; mux++) {
1789 if (val == e->values[mux])
1792 ucontrol->value.enumerated.item[1] = mux;
1797 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1800 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1802 * @kcontrol: mixer control
1803 * @ucontrol: control element information
1805 * Callback to set the value of a dapm semi enumerated double mixer control.
1807 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1808 * used for handling bitfield coded enumeration for example.
1810 * Returns 0 for success.
1812 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1813 struct snd_ctl_elem_value *ucontrol)
1815 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1816 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1817 unsigned int val, mux, change;
1821 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1823 mux = ucontrol->value.enumerated.item[0];
1824 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1825 mask = e->mask << e->shift_l;
1826 if (e->shift_l != e->shift_r) {
1827 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1829 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1830 mask |= e->mask << e->shift_r;
1833 mutex_lock(&widget->codec->mutex);
1834 widget->value = val;
1835 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1836 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1838 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1839 ret = widget->event(widget,
1840 kcontrol, SND_SOC_DAPM_PRE_REG);
1845 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1847 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1848 ret = widget->event(widget,
1849 kcontrol, SND_SOC_DAPM_POST_REG);
1852 mutex_unlock(&widget->codec->mutex);
1855 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1858 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1860 * @kcontrol: mixer control
1861 * @uinfo: control element information
1863 * Callback to provide information about a pin switch control.
1865 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1866 struct snd_ctl_elem_info *uinfo)
1868 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1870 uinfo->value.integer.min = 0;
1871 uinfo->value.integer.max = 1;
1875 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1878 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1880 * @kcontrol: mixer control
1883 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1884 struct snd_ctl_elem_value *ucontrol)
1886 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1887 const char *pin = (const char *)kcontrol->private_value;
1889 mutex_lock(&codec->mutex);
1891 ucontrol->value.integer.value[0] =
1892 snd_soc_dapm_get_pin_status(codec, pin);
1894 mutex_unlock(&codec->mutex);
1898 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1901 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1903 * @kcontrol: mixer control
1906 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
1907 struct snd_ctl_elem_value *ucontrol)
1909 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1910 const char *pin = (const char *)kcontrol->private_value;
1912 mutex_lock(&codec->mutex);
1914 if (ucontrol->value.integer.value[0])
1915 snd_soc_dapm_enable_pin(codec, pin);
1917 snd_soc_dapm_disable_pin(codec, pin);
1919 snd_soc_dapm_sync(codec);
1921 mutex_unlock(&codec->mutex);
1925 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
1928 * snd_soc_dapm_new_control - create new dapm control
1929 * @codec: audio codec
1930 * @widget: widget template
1932 * Creates a new dapm control based upon the template.
1934 * Returns 0 for success else error.
1936 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1937 const struct snd_soc_dapm_widget *widget)
1939 struct snd_soc_dapm_widget *w;
1941 if ((w = dapm_cnew_widget(widget)) == NULL)
1945 INIT_LIST_HEAD(&w->sources);
1946 INIT_LIST_HEAD(&w->sinks);
1947 INIT_LIST_HEAD(&w->list);
1948 list_add(&w->list, &codec->dapm_widgets);
1950 /* machine layer set ups unconnected pins and insertions */
1954 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1957 * snd_soc_dapm_new_controls - create new dapm controls
1958 * @codec: audio codec
1959 * @widget: widget array
1960 * @num: number of widgets
1962 * Creates new DAPM controls based upon the templates.
1964 * Returns 0 for success else error.
1966 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1967 const struct snd_soc_dapm_widget *widget,
1972 for (i = 0; i < num; i++) {
1973 ret = snd_soc_dapm_new_control(codec, widget);
1976 "ASoC: Failed to create DAPM control %s: %d\n",
1984 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1988 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1989 * @codec: audio codec
1990 * @stream: stream name
1991 * @event: stream event
1993 * Sends a stream event to the dapm core. The core then makes any
1994 * necessary widget power changes.
1996 * Returns 0 for success else error.
1998 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1999 char *stream, int event)
2001 struct snd_soc_dapm_widget *w;
2006 mutex_lock(&codec->mutex);
2007 list_for_each_entry(w, &codec->dapm_widgets, list)
2011 pr_debug("widget %s\n %s stream %s event %d\n",
2012 w->name, w->sname, stream, event);
2013 if (strstr(w->sname, stream)) {
2015 case SND_SOC_DAPM_STREAM_START:
2018 case SND_SOC_DAPM_STREAM_STOP:
2021 case SND_SOC_DAPM_STREAM_SUSPEND:
2022 case SND_SOC_DAPM_STREAM_RESUME:
2023 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2024 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2030 dapm_power_widgets(codec, event);
2031 mutex_unlock(&codec->mutex);
2034 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2037 * snd_soc_dapm_enable_pin - enable pin.
2041 * Enables input/output pin and its parents or children widgets iff there is
2042 * a valid audio route and active audio stream.
2043 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2044 * do any widget power switching.
2046 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
2048 return snd_soc_dapm_set_pin(codec, pin, 1);
2050 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2053 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2057 * Enables input/output pin regardless of any other state. This is
2058 * intended for use with microphone bias supplies used in microphone
2061 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2062 * do any widget power switching.
2064 int snd_soc_dapm_force_enable_pin(struct snd_soc_codec *codec, const char *pin)
2066 struct snd_soc_dapm_widget *w;
2068 list_for_each_entry(w, &codec->dapm_widgets, list) {
2069 if (!strcmp(w->name, pin)) {
2070 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
2077 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
2080 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2083 * snd_soc_dapm_disable_pin - disable pin.
2087 * Disables input/output pin and its parents or children widgets.
2088 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2089 * do any widget power switching.
2091 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
2093 return snd_soc_dapm_set_pin(codec, pin, 0);
2095 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2098 * snd_soc_dapm_nc_pin - permanently disable pin.
2102 * Marks the specified pin as being not connected, disabling it along
2103 * any parent or child widgets. At present this is identical to
2104 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2105 * additional things such as disabling controls which only affect
2106 * paths through the pin.
2108 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2109 * do any widget power switching.
2111 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
2113 return snd_soc_dapm_set_pin(codec, pin, 0);
2115 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2118 * snd_soc_dapm_get_pin_status - get audio pin status
2119 * @codec: audio codec
2120 * @pin: audio signal pin endpoint (or start point)
2122 * Get audio pin status - connected or disconnected.
2124 * Returns 1 for connected otherwise 0.
2126 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
2128 struct snd_soc_dapm_widget *w;
2130 list_for_each_entry(w, &codec->dapm_widgets, list) {
2131 if (!strcmp(w->name, pin))
2132 return w->connected;
2137 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2140 * snd_soc_dapm_free - free dapm resources
2141 * @socdev: SoC device
2143 * Free all dapm widgets and resources.
2145 void snd_soc_dapm_free(struct snd_soc_device *socdev)
2147 struct snd_soc_codec *codec = socdev->card->codec;
2149 snd_soc_dapm_sys_remove(socdev->dev);
2150 dapm_free_widgets(codec);
2152 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2155 * snd_soc_dapm_shutdown - callback for system shutdown
2157 void snd_soc_dapm_shutdown(struct snd_soc_device *socdev)
2159 struct snd_soc_codec *codec = socdev->card->codec;
2160 struct snd_soc_dapm_widget *w;
2161 LIST_HEAD(down_list);
2164 list_for_each_entry(w, &codec->dapm_widgets, list) {
2166 dapm_seq_insert(w, &down_list, dapm_down_seq);
2172 /* If there were no widgets to power down we're already in
2176 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE);
2177 dapm_seq_run(codec, &down_list, 0, dapm_down_seq);
2178 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY);
2181 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF);
2184 /* Module information */
2185 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2186 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2187 MODULE_LICENSE("GPL");