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 <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc-dapm.h>
44 #include <sound/initval.h>
48 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
50 #define dump_dapm(codec, action)
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq[] = {
55 [snd_soc_dapm_pre] = 0,
56 [snd_soc_dapm_supply] = 1,
57 [snd_soc_dapm_micbias] = 2,
58 [snd_soc_dapm_aif_in] = 3,
59 [snd_soc_dapm_aif_out] = 3,
60 [snd_soc_dapm_mic] = 4,
61 [snd_soc_dapm_mux] = 5,
62 [snd_soc_dapm_value_mux] = 5,
63 [snd_soc_dapm_dac] = 6,
64 [snd_soc_dapm_mixer] = 7,
65 [snd_soc_dapm_mixer_named_ctl] = 7,
66 [snd_soc_dapm_pga] = 8,
67 [snd_soc_dapm_adc] = 9,
68 [snd_soc_dapm_hp] = 10,
69 [snd_soc_dapm_spk] = 10,
70 [snd_soc_dapm_post] = 11,
73 static int dapm_down_seq[] = {
74 [snd_soc_dapm_pre] = 0,
75 [snd_soc_dapm_adc] = 1,
76 [snd_soc_dapm_hp] = 2,
77 [snd_soc_dapm_spk] = 2,
78 [snd_soc_dapm_pga] = 4,
79 [snd_soc_dapm_mixer_named_ctl] = 5,
80 [snd_soc_dapm_mixer] = 5,
81 [snd_soc_dapm_dac] = 6,
82 [snd_soc_dapm_mic] = 7,
83 [snd_soc_dapm_micbias] = 8,
84 [snd_soc_dapm_mux] = 9,
85 [snd_soc_dapm_value_mux] = 9,
86 [snd_soc_dapm_aif_in] = 10,
87 [snd_soc_dapm_aif_out] = 10,
88 [snd_soc_dapm_supply] = 11,
89 [snd_soc_dapm_post] = 12,
92 static void pop_wait(u32 pop_time)
95 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
98 static void pop_dbg(u32 pop_time, const char *fmt, ...)
112 /* create a new dapm widget */
113 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
114 const struct snd_soc_dapm_widget *_widget)
116 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
120 * snd_soc_dapm_set_bias_level - set the bias level for the system
121 * @socdev: audio device
122 * @level: level to configure
124 * Configure the bias (power) levels for the SoC audio device.
126 * Returns 0 for success else error.
128 static int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
129 enum snd_soc_bias_level level)
131 struct snd_soc_card *card = socdev->card;
132 struct snd_soc_codec *codec = socdev->card->codec;
136 case SND_SOC_BIAS_ON:
137 dev_dbg(socdev->dev, "Setting full bias\n");
139 case SND_SOC_BIAS_PREPARE:
140 dev_dbg(socdev->dev, "Setting bias prepare\n");
142 case SND_SOC_BIAS_STANDBY:
143 dev_dbg(socdev->dev, "Setting standby bias\n");
145 case SND_SOC_BIAS_OFF:
146 dev_dbg(socdev->dev, "Setting bias off\n");
149 dev_err(socdev->dev, "Setting invalid bias %d\n", level);
153 if (card->set_bias_level)
154 ret = card->set_bias_level(card, level);
155 if (ret == 0 && codec->set_bias_level)
156 ret = codec->set_bias_level(codec, level);
161 /* set up initial codec paths */
162 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
163 struct snd_soc_dapm_path *p, int i)
166 case snd_soc_dapm_switch:
167 case snd_soc_dapm_mixer:
168 case snd_soc_dapm_mixer_named_ctl: {
170 struct soc_mixer_control *mc = (struct soc_mixer_control *)
171 w->kcontrols[i].private_value;
172 unsigned int reg = mc->reg;
173 unsigned int shift = mc->shift;
175 unsigned int mask = (1 << fls(max)) - 1;
176 unsigned int invert = mc->invert;
178 val = snd_soc_read(w->codec, reg);
179 val = (val >> shift) & mask;
181 if ((invert && !val) || (!invert && val))
187 case snd_soc_dapm_mux: {
188 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
189 int val, item, bitmask;
191 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
193 val = snd_soc_read(w->codec, e->reg);
194 item = (val >> e->shift_l) & (bitmask - 1);
197 for (i = 0; i < e->max; i++) {
198 if (!(strcmp(p->name, e->texts[i])) && item == i)
203 case snd_soc_dapm_value_mux: {
204 struct soc_enum *e = (struct soc_enum *)
205 w->kcontrols[i].private_value;
208 val = snd_soc_read(w->codec, e->reg);
209 val = (val >> e->shift_l) & e->mask;
210 for (item = 0; item < e->max; item++) {
211 if (val == e->values[item])
216 for (i = 0; i < e->max; i++) {
217 if (!(strcmp(p->name, e->texts[i])) && item == i)
222 /* does not effect routing - always connected */
223 case snd_soc_dapm_pga:
224 case snd_soc_dapm_output:
225 case snd_soc_dapm_adc:
226 case snd_soc_dapm_input:
227 case snd_soc_dapm_dac:
228 case snd_soc_dapm_micbias:
229 case snd_soc_dapm_vmid:
230 case snd_soc_dapm_supply:
231 case snd_soc_dapm_aif_in:
232 case snd_soc_dapm_aif_out:
235 /* does effect routing - dynamically connected */
236 case snd_soc_dapm_hp:
237 case snd_soc_dapm_mic:
238 case snd_soc_dapm_spk:
239 case snd_soc_dapm_line:
240 case snd_soc_dapm_pre:
241 case snd_soc_dapm_post:
247 /* connect mux widget to its interconnecting audio paths */
248 static int dapm_connect_mux(struct snd_soc_codec *codec,
249 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
250 struct snd_soc_dapm_path *path, const char *control_name,
251 const struct snd_kcontrol_new *kcontrol)
253 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
256 for (i = 0; i < e->max; i++) {
257 if (!(strcmp(control_name, e->texts[i]))) {
258 list_add(&path->list, &codec->dapm_paths);
259 list_add(&path->list_sink, &dest->sources);
260 list_add(&path->list_source, &src->sinks);
261 path->name = (char*)e->texts[i];
262 dapm_set_path_status(dest, path, 0);
270 /* connect mixer widget to its interconnecting audio paths */
271 static int dapm_connect_mixer(struct snd_soc_codec *codec,
272 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
273 struct snd_soc_dapm_path *path, const char *control_name)
277 /* search for mixer kcontrol */
278 for (i = 0; i < dest->num_kcontrols; i++) {
279 if (!strcmp(control_name, dest->kcontrols[i].name)) {
280 list_add(&path->list, &codec->dapm_paths);
281 list_add(&path->list_sink, &dest->sources);
282 list_add(&path->list_source, &src->sinks);
283 path->name = dest->kcontrols[i].name;
284 dapm_set_path_status(dest, path, i);
291 /* update dapm codec register bits */
292 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
295 unsigned int old, new;
296 struct snd_soc_codec *codec = widget->codec;
298 /* check for valid widgets */
299 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
300 widget->id == snd_soc_dapm_output ||
301 widget->id == snd_soc_dapm_hp ||
302 widget->id == snd_soc_dapm_mic ||
303 widget->id == snd_soc_dapm_line ||
304 widget->id == snd_soc_dapm_spk)
307 power = widget->power;
309 power = (power ? 0:1);
311 old = snd_soc_read(codec, widget->reg);
312 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
316 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
317 widget->name, widget->power ? "on" : "off",
319 snd_soc_write(codec, widget->reg, new);
320 pop_wait(codec->pop_time);
322 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
327 /* ramps the volume up or down to minimise pops before or after a
328 * DAPM power event */
329 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
331 const struct snd_kcontrol_new *k = widget->kcontrols;
333 if (widget->muted && !power)
335 if (!widget->muted && power)
338 if (widget->num_kcontrols && k) {
339 struct soc_mixer_control *mc =
340 (struct soc_mixer_control *)k->private_value;
341 unsigned int reg = mc->reg;
342 unsigned int shift = mc->shift;
344 unsigned int mask = (1 << fls(max)) - 1;
345 unsigned int invert = mc->invert;
349 /* power up has happended, increase volume to last level */
351 for (i = max; i > widget->saved_value; i--)
352 snd_soc_update_bits(widget->codec, reg, mask, i);
354 for (i = 0; i < widget->saved_value; i++)
355 snd_soc_update_bits(widget->codec, reg, mask, i);
359 /* power down is about to occur, decrease volume to mute */
360 int val = snd_soc_read(widget->codec, reg);
361 int i = widget->saved_value = (val >> shift) & mask;
363 for (; i < mask; i++)
364 snd_soc_update_bits(widget->codec, reg, mask, i);
367 snd_soc_update_bits(widget->codec, reg, mask, i);
375 /* create new dapm mixer control */
376 static int dapm_new_mixer(struct snd_soc_codec *codec,
377 struct snd_soc_dapm_widget *w)
381 struct snd_soc_dapm_path *path;
384 for (i = 0; i < w->num_kcontrols; i++) {
387 list_for_each_entry(path, &w->sources, list_sink) {
389 /* mixer/mux paths name must match control name */
390 if (path->name != (char*)w->kcontrols[i].name)
393 /* add dapm control with long name.
394 * for dapm_mixer this is the concatenation of the
395 * mixer and kcontrol name.
396 * for dapm_mixer_named_ctl this is simply the
399 name_len = strlen(w->kcontrols[i].name) + 1;
400 if (w->id != snd_soc_dapm_mixer_named_ctl)
401 name_len += 1 + strlen(w->name);
403 path->long_name = kmalloc(name_len, GFP_KERNEL);
405 if (path->long_name == NULL)
410 snprintf(path->long_name, name_len, "%s %s",
411 w->name, w->kcontrols[i].name);
413 case snd_soc_dapm_mixer_named_ctl:
414 snprintf(path->long_name, name_len, "%s",
415 w->kcontrols[i].name);
419 path->long_name[name_len - 1] = '\0';
421 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
423 ret = snd_ctl_add(codec->card, path->kcontrol);
425 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s: %d\n",
428 kfree(path->long_name);
429 path->long_name = NULL;
437 /* create new dapm mux control */
438 static int dapm_new_mux(struct snd_soc_codec *codec,
439 struct snd_soc_dapm_widget *w)
441 struct snd_soc_dapm_path *path = NULL;
442 struct snd_kcontrol *kcontrol;
445 if (!w->num_kcontrols) {
446 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
450 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
451 ret = snd_ctl_add(codec->card, kcontrol);
455 list_for_each_entry(path, &w->sources, list_sink)
456 path->kcontrol = kcontrol;
461 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
465 /* create new dapm volume control */
466 static int dapm_new_pga(struct snd_soc_codec *codec,
467 struct snd_soc_dapm_widget *w)
469 struct snd_kcontrol *kcontrol;
472 if (!w->num_kcontrols)
475 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
476 ret = snd_ctl_add(codec->card, kcontrol);
478 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
485 /* reset 'walked' bit for each dapm path */
486 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
488 struct snd_soc_dapm_path *p;
490 list_for_each_entry(p, &codec->dapm_paths, list)
495 * Recursively check for a completed path to an active or physically connected
496 * output widget. Returns number of complete paths.
498 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
500 struct snd_soc_dapm_path *path;
503 if (widget->id == snd_soc_dapm_supply)
506 switch (widget->id) {
507 case snd_soc_dapm_adc:
508 case snd_soc_dapm_aif_out:
515 if (widget->connected) {
516 /* connected pin ? */
517 if (widget->id == snd_soc_dapm_output && !widget->ext)
520 /* connected jack or spk ? */
521 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
522 widget->id == snd_soc_dapm_line)
526 list_for_each_entry(path, &widget->sinks, list_source) {
530 if (path->sink && path->connect) {
532 con += is_connected_output_ep(path->sink);
540 * Recursively check for a completed path to an active or physically connected
541 * input widget. Returns number of complete paths.
543 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
545 struct snd_soc_dapm_path *path;
548 if (widget->id == snd_soc_dapm_supply)
551 /* active stream ? */
552 switch (widget->id) {
553 case snd_soc_dapm_dac:
554 case snd_soc_dapm_aif_in:
561 if (widget->connected) {
562 /* connected pin ? */
563 if (widget->id == snd_soc_dapm_input && !widget->ext)
566 /* connected VMID/Bias for lower pops */
567 if (widget->id == snd_soc_dapm_vmid)
570 /* connected jack ? */
571 if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line)
575 list_for_each_entry(path, &widget->sources, list_sink) {
579 if (path->source && path->connect) {
581 con += is_connected_input_ep(path->source);
589 * Handler for generic register modifier widget.
591 int dapm_reg_event(struct snd_soc_dapm_widget *w,
592 struct snd_kcontrol *kcontrol, int event)
596 if (SND_SOC_DAPM_EVENT_ON(event))
601 snd_soc_update_bits(w->codec, -(w->reg + 1),
602 w->mask << w->shift, val << w->shift);
606 EXPORT_SYMBOL_GPL(dapm_reg_event);
608 /* Standard power change method, used to apply power changes to most
611 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
615 /* call any power change event handlers */
617 pr_debug("power %s event for %s flags %x\n",
618 w->power ? "on" : "off",
619 w->name, w->event_flags);
621 /* power up pre event */
622 if (w->power && w->event &&
623 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
624 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
629 /* power down pre event */
630 if (!w->power && w->event &&
631 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
632 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
637 /* Lower PGA volume to reduce pops */
638 if (w->id == snd_soc_dapm_pga && !w->power)
639 dapm_set_pga(w, w->power);
643 /* Raise PGA volume to reduce pops */
644 if (w->id == snd_soc_dapm_pga && w->power)
645 dapm_set_pga(w, w->power);
647 /* power up post event */
648 if (w->power && w->event &&
649 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
651 NULL, SND_SOC_DAPM_POST_PMU);
656 /* power down post event */
657 if (!w->power && w->event &&
658 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
659 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
667 /* Generic check to see if a widget should be powered.
669 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
673 in = is_connected_input_ep(w);
674 dapm_clear_walk(w->codec);
675 out = is_connected_output_ep(w);
676 dapm_clear_walk(w->codec);
677 return out != 0 && in != 0;
680 /* Check to see if an ADC has power */
681 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
686 in = is_connected_input_ep(w);
687 dapm_clear_walk(w->codec);
690 return dapm_generic_check_power(w);
694 /* Check to see if a DAC has power */
695 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
700 out = is_connected_output_ep(w);
701 dapm_clear_walk(w->codec);
704 return dapm_generic_check_power(w);
708 /* Check to see if a power supply is needed */
709 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
711 struct snd_soc_dapm_path *path;
714 /* Check if one of our outputs is connected */
715 list_for_each_entry(path, &w->sinks, list_source) {
716 if (path->sink && path->sink->power_check &&
717 path->sink->power_check(path->sink)) {
723 dapm_clear_walk(w->codec);
728 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
729 struct snd_soc_dapm_widget *b,
732 if (sort[a->id] != sort[b->id])
733 return sort[a->id] - sort[b->id];
734 if (a->reg != b->reg)
735 return a->reg - b->reg;
740 /* Insert a widget in order into a DAPM power sequence. */
741 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
742 struct list_head *list,
745 struct snd_soc_dapm_widget *w;
747 list_for_each_entry(w, list, power_list)
748 if (dapm_seq_compare(new_widget, w, sort) < 0) {
749 list_add_tail(&new_widget->power_list, &w->power_list);
753 list_add_tail(&new_widget->power_list, list);
756 /* Apply the coalesced changes from a DAPM sequence */
757 static void dapm_seq_run_coalesced(struct snd_soc_codec *codec,
758 struct list_head *pending)
760 struct snd_soc_dapm_widget *w;
762 unsigned int value = 0;
763 unsigned int mask = 0;
764 unsigned int cur_mask;
766 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
769 list_for_each_entry(w, pending, power_list) {
770 cur_mask = 1 << w->shift;
771 BUG_ON(reg != w->reg);
782 pop_dbg(codec->pop_time,
783 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
784 w->name, reg, value, mask);
786 /* power up pre event */
787 if (w->power && w->event &&
788 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
789 pop_dbg(codec->pop_time, "pop test : %s PRE_PMU\n",
791 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
793 pr_err("%s: pre event failed: %d\n",
797 /* power down pre event */
798 if (!w->power && w->event &&
799 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
800 pop_dbg(codec->pop_time, "pop test : %s PRE_PMD\n",
802 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
804 pr_err("%s: pre event failed: %d\n",
808 /* Lower PGA volume to reduce pops */
809 if (w->id == snd_soc_dapm_pga && !w->power)
810 dapm_set_pga(w, w->power);
814 pop_dbg(codec->pop_time,
815 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
816 value, mask, reg, codec->pop_time);
817 pop_wait(codec->pop_time);
818 snd_soc_update_bits(codec, reg, mask, value);
821 list_for_each_entry(w, pending, power_list) {
822 /* Raise PGA volume to reduce pops */
823 if (w->id == snd_soc_dapm_pga && w->power)
824 dapm_set_pga(w, w->power);
826 /* power up post event */
827 if (w->power && w->event &&
828 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
829 pop_dbg(codec->pop_time, "pop test : %s POST_PMU\n",
832 NULL, SND_SOC_DAPM_POST_PMU);
834 pr_err("%s: post event failed: %d\n",
838 /* power down post event */
839 if (!w->power && w->event &&
840 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
841 pop_dbg(codec->pop_time, "pop test : %s POST_PMD\n",
843 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
845 pr_err("%s: post event failed: %d\n",
851 /* Apply a DAPM power sequence.
853 * We walk over a pre-sorted list of widgets to apply power to. In
854 * order to minimise the number of writes to the device required
855 * multiple widgets will be updated in a single write where possible.
856 * Currently anything that requires more than a single write is not
859 static void dapm_seq_run(struct snd_soc_codec *codec, struct list_head *list,
860 int event, int sort[])
862 struct snd_soc_dapm_widget *w, *n;
865 int cur_reg = SND_SOC_NOPM;
868 list_for_each_entry_safe(w, n, list, power_list) {
871 /* Do we need to apply any queued changes? */
872 if (sort[w->id] != cur_sort || w->reg != cur_reg) {
873 if (!list_empty(&pending))
874 dapm_seq_run_coalesced(codec, &pending);
876 INIT_LIST_HEAD(&pending);
878 cur_reg = SND_SOC_NOPM;
882 case snd_soc_dapm_pre:
884 list_for_each_entry_safe_continue(w, n, list,
887 if (event == SND_SOC_DAPM_STREAM_START)
889 NULL, SND_SOC_DAPM_PRE_PMU);
890 else if (event == SND_SOC_DAPM_STREAM_STOP)
892 NULL, SND_SOC_DAPM_PRE_PMD);
895 case snd_soc_dapm_post:
897 list_for_each_entry_safe_continue(w, n, list,
900 if (event == SND_SOC_DAPM_STREAM_START)
902 NULL, SND_SOC_DAPM_POST_PMU);
903 else if (event == SND_SOC_DAPM_STREAM_STOP)
905 NULL, SND_SOC_DAPM_POST_PMD);
908 case snd_soc_dapm_input:
909 case snd_soc_dapm_output:
910 case snd_soc_dapm_hp:
911 case snd_soc_dapm_mic:
912 case snd_soc_dapm_line:
913 case snd_soc_dapm_spk:
914 /* No register support currently */
915 ret = dapm_generic_apply_power(w);
919 /* Queue it up for application */
920 cur_sort = sort[w->id];
922 list_move(&w->power_list, &pending);
927 pr_err("Failed to apply widget power: %d\n",
931 if (!list_empty(&pending))
932 dapm_seq_run_coalesced(codec, &pending);
936 * Scan each dapm widget for complete audio path.
937 * A complete path is a route that has valid endpoints i.e.:-
939 * o DAC to output pin.
940 * o Input Pin to ADC.
941 * o Input pin to Output pin (bypass, sidetone)
942 * o DAC to ADC (loopback).
944 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
946 struct snd_soc_device *socdev = codec->socdev;
947 struct snd_soc_dapm_widget *w;
949 LIST_HEAD(down_list);
954 /* Check which widgets we need to power and store them in
955 * lists indicating if they should be powered up or down.
957 list_for_each_entry(w, &codec->dapm_widgets, list) {
959 case snd_soc_dapm_pre:
960 dapm_seq_insert(w, &down_list, dapm_down_seq);
962 case snd_soc_dapm_post:
963 dapm_seq_insert(w, &up_list, dapm_up_seq);
970 power = w->power_check(w);
974 if (w->power == power)
978 dapm_seq_insert(w, &up_list, dapm_up_seq);
980 dapm_seq_insert(w, &down_list, dapm_down_seq);
987 /* If there are no DAPM widgets then try to figure out power from the
990 if (list_empty(&codec->dapm_widgets)) {
992 case SND_SOC_DAPM_STREAM_START:
993 case SND_SOC_DAPM_STREAM_RESUME:
996 case SND_SOC_DAPM_STREAM_NOP:
997 sys_power = codec->bias_level != SND_SOC_BIAS_STANDBY;
1003 /* If we're changing to all on or all off then prepare */
1004 if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
1005 (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {
1006 ret = snd_soc_dapm_set_bias_level(socdev,
1007 SND_SOC_BIAS_PREPARE);
1009 pr_err("Failed to prepare bias: %d\n", ret);
1012 /* Power down widgets first; try to avoid amplifying pops. */
1013 dapm_seq_run(codec, &down_list, event, dapm_down_seq);
1016 dapm_seq_run(codec, &up_list, event, dapm_up_seq);
1018 /* If we just powered the last thing off drop to standby bias */
1019 if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
1020 ret = snd_soc_dapm_set_bias_level(socdev,
1021 SND_SOC_BIAS_STANDBY);
1023 pr_err("Failed to apply standby bias: %d\n", ret);
1026 /* If we just powered up then move to active bias */
1027 if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
1028 ret = snd_soc_dapm_set_bias_level(socdev,
1031 pr_err("Failed to apply active bias: %d\n", ret);
1034 pop_dbg(codec->pop_time, "DAPM sequencing finished, waiting %dms\n",
1041 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
1043 struct snd_soc_dapm_widget *w;
1044 struct snd_soc_dapm_path *p = NULL;
1047 printk("DAPM %s %s\n", codec->name, action);
1049 list_for_each_entry(w, &codec->dapm_widgets, list) {
1051 /* only display widgets that effect routing */
1053 case snd_soc_dapm_pre:
1054 case snd_soc_dapm_post:
1055 case snd_soc_dapm_vmid:
1057 case snd_soc_dapm_mux:
1058 case snd_soc_dapm_value_mux:
1059 case snd_soc_dapm_output:
1060 case snd_soc_dapm_input:
1061 case snd_soc_dapm_switch:
1062 case snd_soc_dapm_hp:
1063 case snd_soc_dapm_mic:
1064 case snd_soc_dapm_spk:
1065 case snd_soc_dapm_line:
1066 case snd_soc_dapm_micbias:
1067 case snd_soc_dapm_dac:
1068 case snd_soc_dapm_adc:
1069 case snd_soc_dapm_pga:
1070 case snd_soc_dapm_mixer:
1071 case snd_soc_dapm_mixer_named_ctl:
1072 case snd_soc_dapm_supply:
1073 case snd_soc_dapm_aif_in:
1074 case snd_soc_dapm_aif_out:
1076 in = is_connected_input_ep(w);
1077 dapm_clear_walk(w->codec);
1078 out = is_connected_output_ep(w);
1079 dapm_clear_walk(w->codec);
1080 printk("%s: %s in %d out %d\n", w->name,
1081 w->power ? "On":"Off",in, out);
1083 list_for_each_entry(p, &w->sources, list_sink) {
1085 printk(" in %s %s\n", p->name ? p->name : "static",
1088 list_for_each_entry(p, &w->sinks, list_source) {
1090 printk(" out %s %s\n", p->name ? p->name : "static",
1100 /* test and update the power status of a mux widget */
1101 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1102 struct snd_kcontrol *kcontrol, int mask,
1103 int mux, int val, struct soc_enum *e)
1105 struct snd_soc_dapm_path *path;
1108 if (widget->id != snd_soc_dapm_mux &&
1109 widget->id != snd_soc_dapm_value_mux)
1112 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
1115 /* find dapm widget path assoc with kcontrol */
1116 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1117 if (path->kcontrol != kcontrol)
1120 if (!path->name || !e->texts[mux])
1124 /* we now need to match the string in the enum to the path */
1125 if (!(strcmp(path->name, e->texts[mux])))
1126 path->connect = 1; /* new connection */
1128 path->connect = 0; /* old connection must be powered down */
1132 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1133 dump_dapm(widget->codec, "mux power update");
1139 /* test and update the power status of a mixer or switch widget */
1140 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1141 struct snd_kcontrol *kcontrol, int reg,
1142 int val_mask, int val, int invert)
1144 struct snd_soc_dapm_path *path;
1147 if (widget->id != snd_soc_dapm_mixer &&
1148 widget->id != snd_soc_dapm_mixer_named_ctl &&
1149 widget->id != snd_soc_dapm_switch)
1152 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
1155 /* find dapm widget path assoc with kcontrol */
1156 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1157 if (path->kcontrol != kcontrol)
1160 /* found, now check type */
1163 /* new connection */
1164 path->connect = invert ? 0:1;
1166 /* old connection must be powered down */
1167 path->connect = invert ? 1:0;
1172 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1173 dump_dapm(widget->codec, "mixer power update");
1179 /* show dapm widget status in sys fs */
1180 static ssize_t dapm_widget_show(struct device *dev,
1181 struct device_attribute *attr, char *buf)
1183 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1184 struct snd_soc_codec *codec = devdata->card->codec;
1185 struct snd_soc_dapm_widget *w;
1187 char *state = "not set";
1189 list_for_each_entry(w, &codec->dapm_widgets, list) {
1191 /* only display widgets that burnm power */
1193 case snd_soc_dapm_hp:
1194 case snd_soc_dapm_mic:
1195 case snd_soc_dapm_spk:
1196 case snd_soc_dapm_line:
1197 case snd_soc_dapm_micbias:
1198 case snd_soc_dapm_dac:
1199 case snd_soc_dapm_adc:
1200 case snd_soc_dapm_pga:
1201 case snd_soc_dapm_mixer:
1202 case snd_soc_dapm_mixer_named_ctl:
1203 case snd_soc_dapm_supply:
1205 count += sprintf(buf + count, "%s: %s\n",
1206 w->name, w->power ? "On":"Off");
1213 switch (codec->bias_level) {
1214 case SND_SOC_BIAS_ON:
1217 case SND_SOC_BIAS_PREPARE:
1220 case SND_SOC_BIAS_STANDBY:
1223 case SND_SOC_BIAS_OFF:
1227 count += sprintf(buf + count, "PM State: %s\n", state);
1232 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1234 int snd_soc_dapm_sys_add(struct device *dev)
1236 return device_create_file(dev, &dev_attr_dapm_widget);
1239 static void snd_soc_dapm_sys_remove(struct device *dev)
1241 device_remove_file(dev, &dev_attr_dapm_widget);
1244 /* free all dapm widgets and resources */
1245 static void dapm_free_widgets(struct snd_soc_codec *codec)
1247 struct snd_soc_dapm_widget *w, *next_w;
1248 struct snd_soc_dapm_path *p, *next_p;
1250 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
1255 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
1257 kfree(p->long_name);
1262 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
1263 const char *pin, int status)
1265 struct snd_soc_dapm_widget *w;
1267 list_for_each_entry(w, &codec->dapm_widgets, list) {
1268 if (!strcmp(w->name, pin)) {
1269 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
1270 w->connected = status;
1275 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
1280 * snd_soc_dapm_sync - scan and power dapm paths
1281 * @codec: audio codec
1283 * Walks all dapm audio paths and powers widgets according to their
1284 * stream or path usage.
1286 * Returns 0 for success.
1288 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
1290 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1291 dump_dapm(codec, "sync");
1294 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1296 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
1297 const char *sink, const char *control, const char *source)
1299 struct snd_soc_dapm_path *path;
1300 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1303 /* find src and dest widgets */
1304 list_for_each_entry(w, &codec->dapm_widgets, list) {
1306 if (!wsink && !(strcmp(w->name, sink))) {
1310 if (!wsource && !(strcmp(w->name, source))) {
1315 if (wsource == NULL || wsink == NULL)
1318 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1322 path->source = wsource;
1324 INIT_LIST_HEAD(&path->list);
1325 INIT_LIST_HEAD(&path->list_source);
1326 INIT_LIST_HEAD(&path->list_sink);
1328 /* check for external widgets */
1329 if (wsink->id == snd_soc_dapm_input) {
1330 if (wsource->id == snd_soc_dapm_micbias ||
1331 wsource->id == snd_soc_dapm_mic ||
1332 wsource->id == snd_soc_dapm_line ||
1333 wsource->id == snd_soc_dapm_output)
1336 if (wsource->id == snd_soc_dapm_output) {
1337 if (wsink->id == snd_soc_dapm_spk ||
1338 wsink->id == snd_soc_dapm_hp ||
1339 wsink->id == snd_soc_dapm_line ||
1340 wsink->id == snd_soc_dapm_input)
1344 /* connect static paths */
1345 if (control == NULL) {
1346 list_add(&path->list, &codec->dapm_paths);
1347 list_add(&path->list_sink, &wsink->sources);
1348 list_add(&path->list_source, &wsource->sinks);
1353 /* connect dynamic paths */
1355 case snd_soc_dapm_adc:
1356 case snd_soc_dapm_dac:
1357 case snd_soc_dapm_pga:
1358 case snd_soc_dapm_input:
1359 case snd_soc_dapm_output:
1360 case snd_soc_dapm_micbias:
1361 case snd_soc_dapm_vmid:
1362 case snd_soc_dapm_pre:
1363 case snd_soc_dapm_post:
1364 case snd_soc_dapm_supply:
1365 case snd_soc_dapm_aif_in:
1366 case snd_soc_dapm_aif_out:
1367 list_add(&path->list, &codec->dapm_paths);
1368 list_add(&path->list_sink, &wsink->sources);
1369 list_add(&path->list_source, &wsource->sinks);
1372 case snd_soc_dapm_mux:
1373 case snd_soc_dapm_value_mux:
1374 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1375 &wsink->kcontrols[0]);
1379 case snd_soc_dapm_switch:
1380 case snd_soc_dapm_mixer:
1381 case snd_soc_dapm_mixer_named_ctl:
1382 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1386 case snd_soc_dapm_hp:
1387 case snd_soc_dapm_mic:
1388 case snd_soc_dapm_line:
1389 case snd_soc_dapm_spk:
1390 list_add(&path->list, &codec->dapm_paths);
1391 list_add(&path->list_sink, &wsink->sources);
1392 list_add(&path->list_source, &wsource->sinks);
1399 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1406 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1408 * @route: audio routes
1409 * @num: number of routes
1411 * Connects 2 dapm widgets together via a named audio path. The sink is
1412 * the widget receiving the audio signal, whilst the source is the sender
1413 * of the audio signal.
1415 * Returns 0 for success else error. On error all resources can be freed
1416 * with a call to snd_soc_card_free().
1418 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1419 const struct snd_soc_dapm_route *route, int num)
1423 for (i = 0; i < num; i++) {
1424 ret = snd_soc_dapm_add_route(codec, route->sink,
1425 route->control, route->source);
1427 printk(KERN_ERR "Failed to add route %s->%s\n",
1437 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1440 * snd_soc_dapm_new_widgets - add new dapm widgets
1441 * @codec: audio codec
1443 * Checks the codec for any new dapm widgets and creates them if found.
1445 * Returns 0 for success.
1447 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1449 struct snd_soc_dapm_widget *w;
1451 list_for_each_entry(w, &codec->dapm_widgets, list)
1457 case snd_soc_dapm_switch:
1458 case snd_soc_dapm_mixer:
1459 case snd_soc_dapm_mixer_named_ctl:
1460 w->power_check = dapm_generic_check_power;
1461 dapm_new_mixer(codec, w);
1463 case snd_soc_dapm_mux:
1464 case snd_soc_dapm_value_mux:
1465 w->power_check = dapm_generic_check_power;
1466 dapm_new_mux(codec, w);
1468 case snd_soc_dapm_adc:
1469 case snd_soc_dapm_aif_out:
1470 w->power_check = dapm_adc_check_power;
1472 case snd_soc_dapm_dac:
1473 case snd_soc_dapm_aif_in:
1474 w->power_check = dapm_dac_check_power;
1476 case snd_soc_dapm_pga:
1477 w->power_check = dapm_generic_check_power;
1478 dapm_new_pga(codec, w);
1480 case snd_soc_dapm_input:
1481 case snd_soc_dapm_output:
1482 case snd_soc_dapm_micbias:
1483 case snd_soc_dapm_spk:
1484 case snd_soc_dapm_hp:
1485 case snd_soc_dapm_mic:
1486 case snd_soc_dapm_line:
1487 w->power_check = dapm_generic_check_power;
1489 case snd_soc_dapm_supply:
1490 w->power_check = dapm_supply_check_power;
1491 case snd_soc_dapm_vmid:
1492 case snd_soc_dapm_pre:
1493 case snd_soc_dapm_post:
1499 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1502 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1505 * snd_soc_dapm_get_volsw - dapm mixer get callback
1506 * @kcontrol: mixer control
1507 * @ucontrol: control element information
1509 * Callback to get the value of a dapm mixer control.
1511 * Returns 0 for success.
1513 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1514 struct snd_ctl_elem_value *ucontrol)
1516 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1517 struct soc_mixer_control *mc =
1518 (struct soc_mixer_control *)kcontrol->private_value;
1519 unsigned int reg = mc->reg;
1520 unsigned int shift = mc->shift;
1521 unsigned int rshift = mc->rshift;
1523 unsigned int invert = mc->invert;
1524 unsigned int mask = (1 << fls(max)) - 1;
1526 /* return the saved value if we are powered down */
1527 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1528 ucontrol->value.integer.value[0] = widget->saved_value;
1532 ucontrol->value.integer.value[0] =
1533 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1534 if (shift != rshift)
1535 ucontrol->value.integer.value[1] =
1536 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1538 ucontrol->value.integer.value[0] =
1539 max - ucontrol->value.integer.value[0];
1540 if (shift != rshift)
1541 ucontrol->value.integer.value[1] =
1542 max - ucontrol->value.integer.value[1];
1547 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1550 * snd_soc_dapm_put_volsw - dapm mixer set callback
1551 * @kcontrol: mixer control
1552 * @ucontrol: control element information
1554 * Callback to set the value of a dapm mixer control.
1556 * Returns 0 for success.
1558 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1559 struct snd_ctl_elem_value *ucontrol)
1561 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1562 struct soc_mixer_control *mc =
1563 (struct soc_mixer_control *)kcontrol->private_value;
1564 unsigned int reg = mc->reg;
1565 unsigned int shift = mc->shift;
1566 unsigned int rshift = mc->rshift;
1568 unsigned int mask = (1 << fls(max)) - 1;
1569 unsigned int invert = mc->invert;
1570 unsigned int val, val2, val_mask;
1573 val = (ucontrol->value.integer.value[0] & mask);
1577 val_mask = mask << shift;
1579 if (shift != rshift) {
1580 val2 = (ucontrol->value.integer.value[1] & mask);
1583 val_mask |= mask << rshift;
1584 val |= val2 << rshift;
1587 mutex_lock(&widget->codec->mutex);
1588 widget->value = val;
1590 /* save volume value if the widget is powered down */
1591 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1592 widget->saved_value = val;
1593 mutex_unlock(&widget->codec->mutex);
1597 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1598 if (widget->event) {
1599 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1600 ret = widget->event(widget, kcontrol,
1601 SND_SOC_DAPM_PRE_REG);
1607 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1608 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1609 ret = widget->event(widget, kcontrol,
1610 SND_SOC_DAPM_POST_REG);
1612 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1615 mutex_unlock(&widget->codec->mutex);
1618 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1621 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1622 * @kcontrol: mixer control
1623 * @ucontrol: control element information
1625 * Callback to get the value of a dapm enumerated double mixer control.
1627 * Returns 0 for success.
1629 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1630 struct snd_ctl_elem_value *ucontrol)
1632 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1633 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1634 unsigned int val, bitmask;
1636 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1638 val = snd_soc_read(widget->codec, e->reg);
1639 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1640 if (e->shift_l != e->shift_r)
1641 ucontrol->value.enumerated.item[1] =
1642 (val >> e->shift_r) & (bitmask - 1);
1646 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1649 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1650 * @kcontrol: mixer control
1651 * @ucontrol: control element information
1653 * Callback to set the value of a dapm enumerated double mixer control.
1655 * Returns 0 for success.
1657 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1658 struct snd_ctl_elem_value *ucontrol)
1660 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1661 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1662 unsigned int val, mux;
1663 unsigned int mask, bitmask;
1666 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1668 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1670 mux = ucontrol->value.enumerated.item[0];
1671 val = mux << e->shift_l;
1672 mask = (bitmask - 1) << e->shift_l;
1673 if (e->shift_l != e->shift_r) {
1674 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1676 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1677 mask |= (bitmask - 1) << e->shift_r;
1680 mutex_lock(&widget->codec->mutex);
1681 widget->value = val;
1682 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1683 if (widget->event) {
1684 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1685 ret = widget->event(widget,
1686 kcontrol, SND_SOC_DAPM_PRE_REG);
1690 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1691 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1692 ret = widget->event(widget,
1693 kcontrol, SND_SOC_DAPM_POST_REG);
1695 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1698 mutex_unlock(&widget->codec->mutex);
1701 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1704 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1706 * @kcontrol: mixer control
1707 * @ucontrol: control element information
1709 * Callback to get the value of a dapm semi enumerated double mixer control.
1711 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1712 * used for handling bitfield coded enumeration for example.
1714 * Returns 0 for success.
1716 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1717 struct snd_ctl_elem_value *ucontrol)
1719 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1720 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1721 unsigned int reg_val, val, mux;
1723 reg_val = snd_soc_read(widget->codec, e->reg);
1724 val = (reg_val >> e->shift_l) & e->mask;
1725 for (mux = 0; mux < e->max; mux++) {
1726 if (val == e->values[mux])
1729 ucontrol->value.enumerated.item[0] = mux;
1730 if (e->shift_l != e->shift_r) {
1731 val = (reg_val >> e->shift_r) & e->mask;
1732 for (mux = 0; mux < e->max; mux++) {
1733 if (val == e->values[mux])
1736 ucontrol->value.enumerated.item[1] = mux;
1741 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1744 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1746 * @kcontrol: mixer control
1747 * @ucontrol: control element information
1749 * Callback to set the value of a dapm semi enumerated double mixer control.
1751 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1752 * used for handling bitfield coded enumeration for example.
1754 * Returns 0 for success.
1756 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1757 struct snd_ctl_elem_value *ucontrol)
1759 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1760 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1761 unsigned int val, mux;
1765 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1767 mux = ucontrol->value.enumerated.item[0];
1768 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1769 mask = e->mask << e->shift_l;
1770 if (e->shift_l != e->shift_r) {
1771 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1773 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1774 mask |= e->mask << e->shift_r;
1777 mutex_lock(&widget->codec->mutex);
1778 widget->value = val;
1779 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1780 if (widget->event) {
1781 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1782 ret = widget->event(widget,
1783 kcontrol, SND_SOC_DAPM_PRE_REG);
1787 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1788 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1789 ret = widget->event(widget,
1790 kcontrol, SND_SOC_DAPM_POST_REG);
1792 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1795 mutex_unlock(&widget->codec->mutex);
1798 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1801 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1803 * @kcontrol: mixer control
1804 * @uinfo: control element information
1806 * Callback to provide information about a pin switch control.
1808 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1809 struct snd_ctl_elem_info *uinfo)
1811 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1813 uinfo->value.integer.min = 0;
1814 uinfo->value.integer.max = 1;
1818 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1821 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1823 * @kcontrol: mixer control
1826 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1827 struct snd_ctl_elem_value *ucontrol)
1829 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1830 const char *pin = (const char *)kcontrol->private_value;
1832 mutex_lock(&codec->mutex);
1834 ucontrol->value.integer.value[0] =
1835 snd_soc_dapm_get_pin_status(codec, pin);
1837 mutex_unlock(&codec->mutex);
1841 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1844 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1846 * @kcontrol: mixer control
1849 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
1850 struct snd_ctl_elem_value *ucontrol)
1852 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1853 const char *pin = (const char *)kcontrol->private_value;
1855 mutex_lock(&codec->mutex);
1857 if (ucontrol->value.integer.value[0])
1858 snd_soc_dapm_enable_pin(codec, pin);
1860 snd_soc_dapm_disable_pin(codec, pin);
1862 snd_soc_dapm_sync(codec);
1864 mutex_unlock(&codec->mutex);
1868 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
1871 * snd_soc_dapm_new_control - create new dapm control
1872 * @codec: audio codec
1873 * @widget: widget template
1875 * Creates a new dapm control based upon the template.
1877 * Returns 0 for success else error.
1879 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1880 const struct snd_soc_dapm_widget *widget)
1882 struct snd_soc_dapm_widget *w;
1884 if ((w = dapm_cnew_widget(widget)) == NULL)
1888 INIT_LIST_HEAD(&w->sources);
1889 INIT_LIST_HEAD(&w->sinks);
1890 INIT_LIST_HEAD(&w->list);
1891 list_add(&w->list, &codec->dapm_widgets);
1893 /* machine layer set ups unconnected pins and insertions */
1897 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1900 * snd_soc_dapm_new_controls - create new dapm controls
1901 * @codec: audio codec
1902 * @widget: widget array
1903 * @num: number of widgets
1905 * Creates new DAPM controls based upon the templates.
1907 * Returns 0 for success else error.
1909 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1910 const struct snd_soc_dapm_widget *widget,
1915 for (i = 0; i < num; i++) {
1916 ret = snd_soc_dapm_new_control(codec, widget);
1919 "ASoC: Failed to create DAPM control %s: %d\n",
1927 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1931 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1932 * @codec: audio codec
1933 * @stream: stream name
1934 * @event: stream event
1936 * Sends a stream event to the dapm core. The core then makes any
1937 * necessary widget power changes.
1939 * Returns 0 for success else error.
1941 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1942 char *stream, int event)
1944 struct snd_soc_dapm_widget *w;
1949 mutex_lock(&codec->mutex);
1950 list_for_each_entry(w, &codec->dapm_widgets, list)
1954 pr_debug("widget %s\n %s stream %s event %d\n",
1955 w->name, w->sname, stream, event);
1956 if (strstr(w->sname, stream)) {
1958 case SND_SOC_DAPM_STREAM_START:
1961 case SND_SOC_DAPM_STREAM_STOP:
1964 case SND_SOC_DAPM_STREAM_SUSPEND:
1969 case SND_SOC_DAPM_STREAM_RESUME:
1975 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
1977 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
1982 mutex_unlock(&codec->mutex);
1984 dapm_power_widgets(codec, event);
1985 dump_dapm(codec, __func__);
1988 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
1991 * snd_soc_dapm_enable_pin - enable pin.
1995 * Enables input/output pin and its parents or children widgets iff there is
1996 * a valid audio route and active audio stream.
1997 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1998 * do any widget power switching.
2000 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
2002 return snd_soc_dapm_set_pin(codec, pin, 1);
2004 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2007 * snd_soc_dapm_disable_pin - disable pin.
2011 * Disables input/output pin and its parents or children widgets.
2012 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2013 * do any widget power switching.
2015 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
2017 return snd_soc_dapm_set_pin(codec, pin, 0);
2019 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2022 * snd_soc_dapm_nc_pin - permanently disable pin.
2026 * Marks the specified pin as being not connected, disabling it along
2027 * any parent or child widgets. At present this is identical to
2028 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2029 * additional things such as disabling controls which only affect
2030 * paths through the pin.
2032 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2033 * do any widget power switching.
2035 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
2037 return snd_soc_dapm_set_pin(codec, pin, 0);
2039 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2042 * snd_soc_dapm_get_pin_status - get audio pin status
2043 * @codec: audio codec
2044 * @pin: audio signal pin endpoint (or start point)
2046 * Get audio pin status - connected or disconnected.
2048 * Returns 1 for connected otherwise 0.
2050 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
2052 struct snd_soc_dapm_widget *w;
2054 list_for_each_entry(w, &codec->dapm_widgets, list) {
2055 if (!strcmp(w->name, pin))
2056 return w->connected;
2061 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2064 * snd_soc_dapm_free - free dapm resources
2065 * @socdev: SoC device
2067 * Free all dapm widgets and resources.
2069 void snd_soc_dapm_free(struct snd_soc_device *socdev)
2071 struct snd_soc_codec *codec = socdev->card->codec;
2073 snd_soc_dapm_sys_remove(socdev->dev);
2074 dapm_free_widgets(codec);
2076 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2079 * snd_soc_dapm_shutdown - callback for system shutdown
2081 void snd_soc_dapm_shutdown(struct snd_soc_device *socdev)
2083 struct snd_soc_codec *codec = socdev->card->codec;
2084 struct snd_soc_dapm_widget *w;
2085 LIST_HEAD(down_list);
2088 list_for_each_entry(w, &codec->dapm_widgets, list) {
2090 dapm_seq_insert(w, &down_list, dapm_down_seq);
2096 /* If there were no widgets to power down we're already in
2100 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE);
2101 dapm_seq_run(codec, &down_list, 0, dapm_down_seq);
2102 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY);
2105 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF);
2108 /* Module information */
2109 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2110 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2111 MODULE_LICENSE("GPL");