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_mic] = 3,
59 [snd_soc_dapm_mux] = 4,
60 [snd_soc_dapm_value_mux] = 4,
61 [snd_soc_dapm_dac] = 5,
62 [snd_soc_dapm_mixer] = 6,
63 [snd_soc_dapm_mixer_named_ctl] = 6,
64 [snd_soc_dapm_pga] = 7,
65 [snd_soc_dapm_adc] = 8,
66 [snd_soc_dapm_hp] = 9,
67 [snd_soc_dapm_spk] = 10,
68 [snd_soc_dapm_post] = 11,
71 static int dapm_down_seq[] = {
72 [snd_soc_dapm_pre] = 0,
73 [snd_soc_dapm_adc] = 1,
74 [snd_soc_dapm_hp] = 2,
75 [snd_soc_dapm_spk] = 3,
76 [snd_soc_dapm_pga] = 4,
77 [snd_soc_dapm_mixer_named_ctl] = 5,
78 [snd_soc_dapm_mixer] = 5,
79 [snd_soc_dapm_dac] = 6,
80 [snd_soc_dapm_mic] = 7,
81 [snd_soc_dapm_micbias] = 8,
82 [snd_soc_dapm_mux] = 9,
83 [snd_soc_dapm_value_mux] = 9,
84 [snd_soc_dapm_supply] = 10,
85 [snd_soc_dapm_post] = 11,
88 static void pop_wait(u32 pop_time)
91 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
94 static void pop_dbg(u32 pop_time, const char *fmt, ...)
108 /* create a new dapm widget */
109 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
110 const struct snd_soc_dapm_widget *_widget)
112 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
116 * snd_soc_dapm_set_bias_level - set the bias level for the system
117 * @socdev: audio device
118 * @level: level to configure
120 * Configure the bias (power) levels for the SoC audio device.
122 * Returns 0 for success else error.
124 static int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
125 enum snd_soc_bias_level level)
127 struct snd_soc_card *card = socdev->card;
128 struct snd_soc_codec *codec = socdev->card->codec;
132 case SND_SOC_BIAS_ON:
133 dev_dbg(socdev->dev, "Setting full bias\n");
135 case SND_SOC_BIAS_PREPARE:
136 dev_dbg(socdev->dev, "Setting bias prepare\n");
138 case SND_SOC_BIAS_STANDBY:
139 dev_dbg(socdev->dev, "Setting standby bias\n");
141 case SND_SOC_BIAS_OFF:
142 dev_dbg(socdev->dev, "Setting bias off\n");
145 dev_err(socdev->dev, "Setting invalid bias %d\n", level);
149 if (card->set_bias_level)
150 ret = card->set_bias_level(card, level);
151 if (ret == 0 && codec->set_bias_level)
152 ret = codec->set_bias_level(codec, level);
157 /* set up initial codec paths */
158 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
159 struct snd_soc_dapm_path *p, int i)
162 case snd_soc_dapm_switch:
163 case snd_soc_dapm_mixer:
164 case snd_soc_dapm_mixer_named_ctl: {
166 struct soc_mixer_control *mc = (struct soc_mixer_control *)
167 w->kcontrols[i].private_value;
168 unsigned int reg = mc->reg;
169 unsigned int shift = mc->shift;
171 unsigned int mask = (1 << fls(max)) - 1;
172 unsigned int invert = mc->invert;
174 val = snd_soc_read(w->codec, reg);
175 val = (val >> shift) & mask;
177 if ((invert && !val) || (!invert && val))
183 case snd_soc_dapm_mux: {
184 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
185 int val, item, bitmask;
187 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
189 val = snd_soc_read(w->codec, e->reg);
190 item = (val >> e->shift_l) & (bitmask - 1);
193 for (i = 0; i < e->max; i++) {
194 if (!(strcmp(p->name, e->texts[i])) && item == i)
199 case snd_soc_dapm_value_mux: {
200 struct soc_enum *e = (struct soc_enum *)
201 w->kcontrols[i].private_value;
204 val = snd_soc_read(w->codec, e->reg);
205 val = (val >> e->shift_l) & e->mask;
206 for (item = 0; item < e->max; item++) {
207 if (val == e->values[item])
212 for (i = 0; i < e->max; i++) {
213 if (!(strcmp(p->name, e->texts[i])) && item == i)
218 /* does not effect routing - always connected */
219 case snd_soc_dapm_pga:
220 case snd_soc_dapm_output:
221 case snd_soc_dapm_adc:
222 case snd_soc_dapm_input:
223 case snd_soc_dapm_dac:
224 case snd_soc_dapm_micbias:
225 case snd_soc_dapm_vmid:
226 case snd_soc_dapm_supply:
229 /* does effect routing - dynamically connected */
230 case snd_soc_dapm_hp:
231 case snd_soc_dapm_mic:
232 case snd_soc_dapm_spk:
233 case snd_soc_dapm_line:
234 case snd_soc_dapm_pre:
235 case snd_soc_dapm_post:
241 /* connect mux widget to its interconnecting audio paths */
242 static int dapm_connect_mux(struct snd_soc_codec *codec,
243 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
244 struct snd_soc_dapm_path *path, const char *control_name,
245 const struct snd_kcontrol_new *kcontrol)
247 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
250 for (i = 0; i < e->max; i++) {
251 if (!(strcmp(control_name, e->texts[i]))) {
252 list_add(&path->list, &codec->dapm_paths);
253 list_add(&path->list_sink, &dest->sources);
254 list_add(&path->list_source, &src->sinks);
255 path->name = (char*)e->texts[i];
256 dapm_set_path_status(dest, path, 0);
264 /* connect mixer widget to its interconnecting audio paths */
265 static int dapm_connect_mixer(struct snd_soc_codec *codec,
266 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
267 struct snd_soc_dapm_path *path, const char *control_name)
271 /* search for mixer kcontrol */
272 for (i = 0; i < dest->num_kcontrols; i++) {
273 if (!strcmp(control_name, dest->kcontrols[i].name)) {
274 list_add(&path->list, &codec->dapm_paths);
275 list_add(&path->list_sink, &dest->sources);
276 list_add(&path->list_source, &src->sinks);
277 path->name = dest->kcontrols[i].name;
278 dapm_set_path_status(dest, path, i);
285 /* update dapm codec register bits */
286 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
289 unsigned short old, new;
290 struct snd_soc_codec *codec = widget->codec;
292 /* check for valid widgets */
293 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
294 widget->id == snd_soc_dapm_output ||
295 widget->id == snd_soc_dapm_hp ||
296 widget->id == snd_soc_dapm_mic ||
297 widget->id == snd_soc_dapm_line ||
298 widget->id == snd_soc_dapm_spk)
301 power = widget->power;
303 power = (power ? 0:1);
305 old = snd_soc_read(codec, widget->reg);
306 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
310 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
311 widget->name, widget->power ? "on" : "off",
313 snd_soc_write(codec, widget->reg, new);
314 pop_wait(codec->pop_time);
316 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
321 /* ramps the volume up or down to minimise pops before or after a
322 * DAPM power event */
323 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
325 const struct snd_kcontrol_new *k = widget->kcontrols;
327 if (widget->muted && !power)
329 if (!widget->muted && power)
332 if (widget->num_kcontrols && k) {
333 struct soc_mixer_control *mc =
334 (struct soc_mixer_control *)k->private_value;
335 unsigned int reg = mc->reg;
336 unsigned int shift = mc->shift;
338 unsigned int mask = (1 << fls(max)) - 1;
339 unsigned int invert = mc->invert;
343 /* power up has happended, increase volume to last level */
345 for (i = max; i > widget->saved_value; i--)
346 snd_soc_update_bits(widget->codec, reg, mask, i);
348 for (i = 0; i < widget->saved_value; i++)
349 snd_soc_update_bits(widget->codec, reg, mask, i);
353 /* power down is about to occur, decrease volume to mute */
354 int val = snd_soc_read(widget->codec, reg);
355 int i = widget->saved_value = (val >> shift) & mask;
357 for (; i < mask; i++)
358 snd_soc_update_bits(widget->codec, reg, mask, i);
361 snd_soc_update_bits(widget->codec, reg, mask, i);
369 /* create new dapm mixer control */
370 static int dapm_new_mixer(struct snd_soc_codec *codec,
371 struct snd_soc_dapm_widget *w)
375 struct snd_soc_dapm_path *path;
378 for (i = 0; i < w->num_kcontrols; i++) {
381 list_for_each_entry(path, &w->sources, list_sink) {
383 /* mixer/mux paths name must match control name */
384 if (path->name != (char*)w->kcontrols[i].name)
387 /* add dapm control with long name.
388 * for dapm_mixer this is the concatenation of the
389 * mixer and kcontrol name.
390 * for dapm_mixer_named_ctl this is simply the
393 name_len = strlen(w->kcontrols[i].name) + 1;
394 if (w->id != snd_soc_dapm_mixer_named_ctl)
395 name_len += 1 + strlen(w->name);
397 path->long_name = kmalloc(name_len, GFP_KERNEL);
399 if (path->long_name == NULL)
404 snprintf(path->long_name, name_len, "%s %s",
405 w->name, w->kcontrols[i].name);
407 case snd_soc_dapm_mixer_named_ctl:
408 snprintf(path->long_name, name_len, "%s",
409 w->kcontrols[i].name);
413 path->long_name[name_len - 1] = '\0';
415 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
417 ret = snd_ctl_add(codec->card, path->kcontrol);
419 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s: %d\n",
422 kfree(path->long_name);
423 path->long_name = NULL;
431 /* create new dapm mux control */
432 static int dapm_new_mux(struct snd_soc_codec *codec,
433 struct snd_soc_dapm_widget *w)
435 struct snd_soc_dapm_path *path = NULL;
436 struct snd_kcontrol *kcontrol;
439 if (!w->num_kcontrols) {
440 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
444 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
445 ret = snd_ctl_add(codec->card, kcontrol);
449 list_for_each_entry(path, &w->sources, list_sink)
450 path->kcontrol = kcontrol;
455 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
459 /* create new dapm volume control */
460 static int dapm_new_pga(struct snd_soc_codec *codec,
461 struct snd_soc_dapm_widget *w)
463 struct snd_kcontrol *kcontrol;
466 if (!w->num_kcontrols)
469 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
470 ret = snd_ctl_add(codec->card, kcontrol);
472 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
479 /* reset 'walked' bit for each dapm path */
480 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
482 struct snd_soc_dapm_path *p;
484 list_for_each_entry(p, &codec->dapm_paths, list)
489 * Recursively check for a completed path to an active or physically connected
490 * output widget. Returns number of complete paths.
492 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
494 struct snd_soc_dapm_path *path;
497 if (widget->id == snd_soc_dapm_supply)
500 if (widget->id == snd_soc_dapm_adc && widget->active)
503 if (widget->connected) {
504 /* connected pin ? */
505 if (widget->id == snd_soc_dapm_output && !widget->ext)
508 /* connected jack or spk ? */
509 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
510 widget->id == snd_soc_dapm_line)
514 list_for_each_entry(path, &widget->sinks, list_source) {
518 if (path->sink && path->connect) {
520 con += is_connected_output_ep(path->sink);
528 * Recursively check for a completed path to an active or physically connected
529 * input widget. Returns number of complete paths.
531 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
533 struct snd_soc_dapm_path *path;
536 if (widget->id == snd_soc_dapm_supply)
539 /* active stream ? */
540 if (widget->id == snd_soc_dapm_dac && widget->active)
543 if (widget->connected) {
544 /* connected pin ? */
545 if (widget->id == snd_soc_dapm_input && !widget->ext)
548 /* connected VMID/Bias for lower pops */
549 if (widget->id == snd_soc_dapm_vmid)
552 /* connected jack ? */
553 if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line)
557 list_for_each_entry(path, &widget->sources, list_sink) {
561 if (path->source && path->connect) {
563 con += is_connected_input_ep(path->source);
571 * Handler for generic register modifier widget.
573 int dapm_reg_event(struct snd_soc_dapm_widget *w,
574 struct snd_kcontrol *kcontrol, int event)
578 if (SND_SOC_DAPM_EVENT_ON(event))
583 snd_soc_update_bits(w->codec, -(w->reg + 1),
584 w->mask << w->shift, val << w->shift);
588 EXPORT_SYMBOL_GPL(dapm_reg_event);
590 /* Standard power change method, used to apply power changes to most
593 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
597 /* call any power change event handlers */
599 pr_debug("power %s event for %s flags %x\n",
600 w->power ? "on" : "off",
601 w->name, w->event_flags);
603 /* power up pre event */
604 if (w->power && w->event &&
605 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
606 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
611 /* power down pre event */
612 if (!w->power && w->event &&
613 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
614 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
619 /* Lower PGA volume to reduce pops */
620 if (w->id == snd_soc_dapm_pga && !w->power)
621 dapm_set_pga(w, w->power);
625 /* Raise PGA volume to reduce pops */
626 if (w->id == snd_soc_dapm_pga && w->power)
627 dapm_set_pga(w, w->power);
629 /* power up post event */
630 if (w->power && w->event &&
631 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
633 NULL, SND_SOC_DAPM_POST_PMU);
638 /* power down post event */
639 if (!w->power && w->event &&
640 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
641 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
649 /* Generic check to see if a widget should be powered.
651 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
655 in = is_connected_input_ep(w);
656 dapm_clear_walk(w->codec);
657 out = is_connected_output_ep(w);
658 dapm_clear_walk(w->codec);
659 return out != 0 && in != 0;
662 /* Check to see if an ADC has power */
663 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
668 in = is_connected_input_ep(w);
669 dapm_clear_walk(w->codec);
672 return dapm_generic_check_power(w);
676 /* Check to see if a DAC has power */
677 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
682 out = is_connected_output_ep(w);
683 dapm_clear_walk(w->codec);
686 return dapm_generic_check_power(w);
690 /* Check to see if a power supply is needed */
691 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
693 struct snd_soc_dapm_path *path;
696 /* Check if one of our outputs is connected */
697 list_for_each_entry(path, &w->sinks, list_source) {
698 if (path->sink && path->sink->power_check &&
699 path->sink->power_check(path->sink)) {
705 dapm_clear_walk(w->codec);
710 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
711 struct snd_soc_dapm_widget *b,
714 if (sort[a->id] != sort[b->id])
715 return sort[a->id] - sort[b->id];
716 if (a->reg != b->reg)
717 return a->reg - b->reg;
722 /* Insert a widget in order into a DAPM power sequence. */
723 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
724 struct list_head *list,
727 struct snd_soc_dapm_widget *w;
729 list_for_each_entry(w, list, power_list)
730 if (dapm_seq_compare(new_widget, w, sort) < 0) {
731 list_add_tail(&new_widget->power_list, &w->power_list);
735 list_add_tail(&new_widget->power_list, list);
738 /* Apply the coalesced changes from a DAPM sequence */
739 static void dapm_seq_run_coalesced(struct snd_soc_codec *codec,
740 struct list_head *pending)
742 struct snd_soc_dapm_widget *w;
744 unsigned int value = 0;
745 unsigned int mask = 0;
746 unsigned int cur_mask;
748 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
751 list_for_each_entry(w, pending, power_list) {
752 cur_mask = 1 << w->shift;
753 BUG_ON(reg != w->reg);
764 pop_dbg(codec->pop_time,
765 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
766 w->name, reg, value, mask);
768 /* power up pre event */
769 if (w->power && w->event &&
770 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
771 pop_dbg(codec->pop_time, "pop test : %s PRE_PMU\n",
773 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
775 pr_err("%s: pre event failed: %d\n",
779 /* power down pre event */
780 if (!w->power && w->event &&
781 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
782 pop_dbg(codec->pop_time, "pop test : %s PRE_PMD\n",
784 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
786 pr_err("%s: pre event failed: %d\n",
792 pop_dbg(codec->pop_time,
793 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
794 value, mask, reg, codec->pop_time);
795 pop_wait(codec->pop_time);
796 snd_soc_update_bits(codec, reg, mask, value);
799 list_for_each_entry(w, pending, power_list) {
800 /* power up post event */
801 if (w->power && w->event &&
802 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
803 pop_dbg(codec->pop_time, "pop test : %s POST_PMU\n",
806 NULL, SND_SOC_DAPM_POST_PMU);
808 pr_err("%s: post event failed: %d\n",
812 /* power down post event */
813 if (!w->power && w->event &&
814 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
815 pop_dbg(codec->pop_time, "pop test : %s POST_PMD\n",
817 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
819 pr_err("%s: post event failed: %d\n",
825 /* Apply a DAPM power sequence.
827 * We walk over a pre-sorted list of widgets to apply power to. In
828 * order to minimise the number of writes to the device required
829 * multiple widgets will be updated in a single write where possible.
830 * Currently anything that requires more than a single write is not
833 static void dapm_seq_run(struct snd_soc_codec *codec, struct list_head *list,
834 int event, int sort[])
836 struct snd_soc_dapm_widget *w, *n;
839 int cur_reg = SND_SOC_NOPM;
842 list_for_each_entry_safe(w, n, list, power_list) {
845 /* Do we need to apply any queued changes? */
846 if (sort[w->id] != cur_sort || w->reg != cur_reg) {
847 if (!list_empty(&pending))
848 dapm_seq_run_coalesced(codec, &pending);
850 INIT_LIST_HEAD(&pending);
852 cur_reg = SND_SOC_NOPM;
856 case snd_soc_dapm_pre:
858 list_for_each_entry_safe_continue(w, n, list,
861 if (event == SND_SOC_DAPM_STREAM_START)
863 NULL, SND_SOC_DAPM_PRE_PMU);
864 else if (event == SND_SOC_DAPM_STREAM_STOP)
866 NULL, SND_SOC_DAPM_PRE_PMD);
869 case snd_soc_dapm_post:
871 list_for_each_entry_safe_continue(w, n, list,
874 if (event == SND_SOC_DAPM_STREAM_START)
876 NULL, SND_SOC_DAPM_POST_PMU);
877 else if (event == SND_SOC_DAPM_STREAM_STOP)
879 NULL, SND_SOC_DAPM_POST_PMD);
882 case snd_soc_dapm_input:
883 case snd_soc_dapm_output:
884 case snd_soc_dapm_hp:
885 case snd_soc_dapm_mic:
886 case snd_soc_dapm_line:
887 case snd_soc_dapm_spk:
888 /* No register support currently */
889 case snd_soc_dapm_pga:
890 /* Don't coalsece these yet due to gain ramping */
891 ret = dapm_generic_apply_power(w);
895 /* Queue it up for application */
896 cur_sort = sort[w->id];
898 list_move(&w->power_list, &pending);
903 pr_err("Failed to apply widget power: %d\n",
907 if (!list_empty(&pending))
908 dapm_seq_run_coalesced(codec, &pending);
912 * Scan each dapm widget for complete audio path.
913 * A complete path is a route that has valid endpoints i.e.:-
915 * o DAC to output pin.
916 * o Input Pin to ADC.
917 * o Input pin to Output pin (bypass, sidetone)
918 * o DAC to ADC (loopback).
920 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
922 struct snd_soc_device *socdev = codec->socdev;
923 struct snd_soc_dapm_widget *w;
928 INIT_LIST_HEAD(&codec->up_list);
929 INIT_LIST_HEAD(&codec->down_list);
931 /* Check which widgets we need to power and store them in
932 * lists indicating if they should be powered up or down.
934 list_for_each_entry(w, &codec->dapm_widgets, list) {
936 case snd_soc_dapm_pre:
937 dapm_seq_insert(w, &codec->down_list, dapm_down_seq);
939 case snd_soc_dapm_post:
940 dapm_seq_insert(w, &codec->up_list, dapm_up_seq);
947 power = w->power_check(w);
951 if (w->power == power)
955 dapm_seq_insert(w, &codec->up_list,
958 dapm_seq_insert(w, &codec->down_list,
966 /* If we're changing to all on or all off then prepare */
967 if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
968 (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {
969 ret = snd_soc_dapm_set_bias_level(socdev,
970 SND_SOC_BIAS_PREPARE);
972 pr_err("Failed to prepare bias: %d\n", ret);
975 /* Power down widgets first; try to avoid amplifying pops. */
976 dapm_seq_run(codec, &codec->down_list, event, dapm_down_seq);
979 dapm_seq_run(codec, &codec->up_list, event, dapm_up_seq);
981 /* If we just powered the last thing off drop to standby bias */
982 if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
983 ret = snd_soc_dapm_set_bias_level(socdev,
984 SND_SOC_BIAS_STANDBY);
986 pr_err("Failed to apply standby bias: %d\n", ret);
989 /* If we just powered up then move to active bias */
990 if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
991 ret = snd_soc_dapm_set_bias_level(socdev,
994 pr_err("Failed to apply active bias: %d\n", ret);
1001 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
1003 struct snd_soc_dapm_widget *w;
1004 struct snd_soc_dapm_path *p = NULL;
1007 printk("DAPM %s %s\n", codec->name, action);
1009 list_for_each_entry(w, &codec->dapm_widgets, list) {
1011 /* only display widgets that effect routing */
1013 case snd_soc_dapm_pre:
1014 case snd_soc_dapm_post:
1015 case snd_soc_dapm_vmid:
1017 case snd_soc_dapm_mux:
1018 case snd_soc_dapm_value_mux:
1019 case snd_soc_dapm_output:
1020 case snd_soc_dapm_input:
1021 case snd_soc_dapm_switch:
1022 case snd_soc_dapm_hp:
1023 case snd_soc_dapm_mic:
1024 case snd_soc_dapm_spk:
1025 case snd_soc_dapm_line:
1026 case snd_soc_dapm_micbias:
1027 case snd_soc_dapm_dac:
1028 case snd_soc_dapm_adc:
1029 case snd_soc_dapm_pga:
1030 case snd_soc_dapm_mixer:
1031 case snd_soc_dapm_mixer_named_ctl:
1032 case snd_soc_dapm_supply:
1034 in = is_connected_input_ep(w);
1035 dapm_clear_walk(w->codec);
1036 out = is_connected_output_ep(w);
1037 dapm_clear_walk(w->codec);
1038 printk("%s: %s in %d out %d\n", w->name,
1039 w->power ? "On":"Off",in, out);
1041 list_for_each_entry(p, &w->sources, list_sink) {
1043 printk(" in %s %s\n", p->name ? p->name : "static",
1046 list_for_each_entry(p, &w->sinks, list_source) {
1048 printk(" out %s %s\n", p->name ? p->name : "static",
1058 /* test and update the power status of a mux widget */
1059 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1060 struct snd_kcontrol *kcontrol, int mask,
1061 int mux, int val, struct soc_enum *e)
1063 struct snd_soc_dapm_path *path;
1066 if (widget->id != snd_soc_dapm_mux &&
1067 widget->id != snd_soc_dapm_value_mux)
1070 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
1073 /* find dapm widget path assoc with kcontrol */
1074 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1075 if (path->kcontrol != kcontrol)
1078 if (!path->name || !e->texts[mux])
1082 /* we now need to match the string in the enum to the path */
1083 if (!(strcmp(path->name, e->texts[mux])))
1084 path->connect = 1; /* new connection */
1086 path->connect = 0; /* old connection must be powered down */
1090 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1091 dump_dapm(widget->codec, "mux power update");
1097 /* test and update the power status of a mixer or switch widget */
1098 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1099 struct snd_kcontrol *kcontrol, int reg,
1100 int val_mask, int val, int invert)
1102 struct snd_soc_dapm_path *path;
1105 if (widget->id != snd_soc_dapm_mixer &&
1106 widget->id != snd_soc_dapm_mixer_named_ctl &&
1107 widget->id != snd_soc_dapm_switch)
1110 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
1113 /* find dapm widget path assoc with kcontrol */
1114 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1115 if (path->kcontrol != kcontrol)
1118 /* found, now check type */
1121 /* new connection */
1122 path->connect = invert ? 0:1;
1124 /* old connection must be powered down */
1125 path->connect = invert ? 1:0;
1130 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1131 dump_dapm(widget->codec, "mixer power update");
1137 /* show dapm widget status in sys fs */
1138 static ssize_t dapm_widget_show(struct device *dev,
1139 struct device_attribute *attr, char *buf)
1141 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1142 struct snd_soc_codec *codec = devdata->card->codec;
1143 struct snd_soc_dapm_widget *w;
1145 char *state = "not set";
1147 list_for_each_entry(w, &codec->dapm_widgets, list) {
1149 /* only display widgets that burnm power */
1151 case snd_soc_dapm_hp:
1152 case snd_soc_dapm_mic:
1153 case snd_soc_dapm_spk:
1154 case snd_soc_dapm_line:
1155 case snd_soc_dapm_micbias:
1156 case snd_soc_dapm_dac:
1157 case snd_soc_dapm_adc:
1158 case snd_soc_dapm_pga:
1159 case snd_soc_dapm_mixer:
1160 case snd_soc_dapm_mixer_named_ctl:
1161 case snd_soc_dapm_supply:
1163 count += sprintf(buf + count, "%s: %s\n",
1164 w->name, w->power ? "On":"Off");
1171 switch (codec->bias_level) {
1172 case SND_SOC_BIAS_ON:
1175 case SND_SOC_BIAS_PREPARE:
1178 case SND_SOC_BIAS_STANDBY:
1181 case SND_SOC_BIAS_OFF:
1185 count += sprintf(buf + count, "PM State: %s\n", state);
1190 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1192 int snd_soc_dapm_sys_add(struct device *dev)
1194 return device_create_file(dev, &dev_attr_dapm_widget);
1197 static void snd_soc_dapm_sys_remove(struct device *dev)
1199 device_remove_file(dev, &dev_attr_dapm_widget);
1202 /* free all dapm widgets and resources */
1203 static void dapm_free_widgets(struct snd_soc_codec *codec)
1205 struct snd_soc_dapm_widget *w, *next_w;
1206 struct snd_soc_dapm_path *p, *next_p;
1208 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
1213 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
1215 kfree(p->long_name);
1220 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
1221 const char *pin, int status)
1223 struct snd_soc_dapm_widget *w;
1225 list_for_each_entry(w, &codec->dapm_widgets, list) {
1226 if (!strcmp(w->name, pin)) {
1227 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
1228 w->connected = status;
1233 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
1238 * snd_soc_dapm_sync - scan and power dapm paths
1239 * @codec: audio codec
1241 * Walks all dapm audio paths and powers widgets according to their
1242 * stream or path usage.
1244 * Returns 0 for success.
1246 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
1248 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1249 dump_dapm(codec, "sync");
1252 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1254 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
1255 const char *sink, const char *control, const char *source)
1257 struct snd_soc_dapm_path *path;
1258 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1261 /* find src and dest widgets */
1262 list_for_each_entry(w, &codec->dapm_widgets, list) {
1264 if (!wsink && !(strcmp(w->name, sink))) {
1268 if (!wsource && !(strcmp(w->name, source))) {
1273 if (wsource == NULL || wsink == NULL)
1276 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1280 path->source = wsource;
1282 INIT_LIST_HEAD(&path->list);
1283 INIT_LIST_HEAD(&path->list_source);
1284 INIT_LIST_HEAD(&path->list_sink);
1286 /* check for external widgets */
1287 if (wsink->id == snd_soc_dapm_input) {
1288 if (wsource->id == snd_soc_dapm_micbias ||
1289 wsource->id == snd_soc_dapm_mic ||
1290 wsink->id == snd_soc_dapm_line ||
1291 wsink->id == snd_soc_dapm_output)
1294 if (wsource->id == snd_soc_dapm_output) {
1295 if (wsink->id == snd_soc_dapm_spk ||
1296 wsink->id == snd_soc_dapm_hp ||
1297 wsink->id == snd_soc_dapm_line ||
1298 wsink->id == snd_soc_dapm_input)
1302 /* connect static paths */
1303 if (control == NULL) {
1304 list_add(&path->list, &codec->dapm_paths);
1305 list_add(&path->list_sink, &wsink->sources);
1306 list_add(&path->list_source, &wsource->sinks);
1311 /* connect dynamic paths */
1313 case snd_soc_dapm_adc:
1314 case snd_soc_dapm_dac:
1315 case snd_soc_dapm_pga:
1316 case snd_soc_dapm_input:
1317 case snd_soc_dapm_output:
1318 case snd_soc_dapm_micbias:
1319 case snd_soc_dapm_vmid:
1320 case snd_soc_dapm_pre:
1321 case snd_soc_dapm_post:
1322 case snd_soc_dapm_supply:
1323 list_add(&path->list, &codec->dapm_paths);
1324 list_add(&path->list_sink, &wsink->sources);
1325 list_add(&path->list_source, &wsource->sinks);
1328 case snd_soc_dapm_mux:
1329 case snd_soc_dapm_value_mux:
1330 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1331 &wsink->kcontrols[0]);
1335 case snd_soc_dapm_switch:
1336 case snd_soc_dapm_mixer:
1337 case snd_soc_dapm_mixer_named_ctl:
1338 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1342 case snd_soc_dapm_hp:
1343 case snd_soc_dapm_mic:
1344 case snd_soc_dapm_line:
1345 case snd_soc_dapm_spk:
1346 list_add(&path->list, &codec->dapm_paths);
1347 list_add(&path->list_sink, &wsink->sources);
1348 list_add(&path->list_source, &wsource->sinks);
1355 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1362 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1364 * @route: audio routes
1365 * @num: number of routes
1367 * Connects 2 dapm widgets together via a named audio path. The sink is
1368 * the widget receiving the audio signal, whilst the source is the sender
1369 * of the audio signal.
1371 * Returns 0 for success else error. On error all resources can be freed
1372 * with a call to snd_soc_card_free().
1374 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1375 const struct snd_soc_dapm_route *route, int num)
1379 for (i = 0; i < num; i++) {
1380 ret = snd_soc_dapm_add_route(codec, route->sink,
1381 route->control, route->source);
1383 printk(KERN_ERR "Failed to add route %s->%s\n",
1393 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1396 * snd_soc_dapm_new_widgets - add new dapm widgets
1397 * @codec: audio codec
1399 * Checks the codec for any new dapm widgets and creates them if found.
1401 * Returns 0 for success.
1403 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1405 struct snd_soc_dapm_widget *w;
1407 list_for_each_entry(w, &codec->dapm_widgets, list)
1413 case snd_soc_dapm_switch:
1414 case snd_soc_dapm_mixer:
1415 case snd_soc_dapm_mixer_named_ctl:
1416 w->power_check = dapm_generic_check_power;
1417 dapm_new_mixer(codec, w);
1419 case snd_soc_dapm_mux:
1420 case snd_soc_dapm_value_mux:
1421 w->power_check = dapm_generic_check_power;
1422 dapm_new_mux(codec, w);
1424 case snd_soc_dapm_adc:
1425 w->power_check = dapm_adc_check_power;
1427 case snd_soc_dapm_dac:
1428 w->power_check = dapm_dac_check_power;
1430 case snd_soc_dapm_pga:
1431 w->power_check = dapm_generic_check_power;
1432 dapm_new_pga(codec, w);
1434 case snd_soc_dapm_input:
1435 case snd_soc_dapm_output:
1436 case snd_soc_dapm_micbias:
1437 case snd_soc_dapm_spk:
1438 case snd_soc_dapm_hp:
1439 case snd_soc_dapm_mic:
1440 case snd_soc_dapm_line:
1441 w->power_check = dapm_generic_check_power;
1443 case snd_soc_dapm_supply:
1444 w->power_check = dapm_supply_check_power;
1445 case snd_soc_dapm_vmid:
1446 case snd_soc_dapm_pre:
1447 case snd_soc_dapm_post:
1453 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1456 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1459 * snd_soc_dapm_get_volsw - dapm mixer get callback
1460 * @kcontrol: mixer control
1461 * @ucontrol: control element information
1463 * Callback to get the value of a dapm mixer control.
1465 * Returns 0 for success.
1467 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1468 struct snd_ctl_elem_value *ucontrol)
1470 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1471 struct soc_mixer_control *mc =
1472 (struct soc_mixer_control *)kcontrol->private_value;
1473 unsigned int reg = mc->reg;
1474 unsigned int shift = mc->shift;
1475 unsigned int rshift = mc->rshift;
1477 unsigned int invert = mc->invert;
1478 unsigned int mask = (1 << fls(max)) - 1;
1480 /* return the saved value if we are powered down */
1481 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1482 ucontrol->value.integer.value[0] = widget->saved_value;
1486 ucontrol->value.integer.value[0] =
1487 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1488 if (shift != rshift)
1489 ucontrol->value.integer.value[1] =
1490 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1492 ucontrol->value.integer.value[0] =
1493 max - ucontrol->value.integer.value[0];
1494 if (shift != rshift)
1495 ucontrol->value.integer.value[1] =
1496 max - ucontrol->value.integer.value[1];
1501 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1504 * snd_soc_dapm_put_volsw - dapm mixer set callback
1505 * @kcontrol: mixer control
1506 * @ucontrol: control element information
1508 * Callback to set the value of a dapm mixer control.
1510 * Returns 0 for success.
1512 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1513 struct snd_ctl_elem_value *ucontrol)
1515 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1516 struct soc_mixer_control *mc =
1517 (struct soc_mixer_control *)kcontrol->private_value;
1518 unsigned int reg = mc->reg;
1519 unsigned int shift = mc->shift;
1520 unsigned int rshift = mc->rshift;
1522 unsigned int mask = (1 << fls(max)) - 1;
1523 unsigned int invert = mc->invert;
1524 unsigned short val, val2, val_mask;
1527 val = (ucontrol->value.integer.value[0] & mask);
1531 val_mask = mask << shift;
1533 if (shift != rshift) {
1534 val2 = (ucontrol->value.integer.value[1] & mask);
1537 val_mask |= mask << rshift;
1538 val |= val2 << rshift;
1541 mutex_lock(&widget->codec->mutex);
1542 widget->value = val;
1544 /* save volume value if the widget is powered down */
1545 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1546 widget->saved_value = val;
1547 mutex_unlock(&widget->codec->mutex);
1551 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1552 if (widget->event) {
1553 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1554 ret = widget->event(widget, kcontrol,
1555 SND_SOC_DAPM_PRE_REG);
1561 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1562 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1563 ret = widget->event(widget, kcontrol,
1564 SND_SOC_DAPM_POST_REG);
1566 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1569 mutex_unlock(&widget->codec->mutex);
1572 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1575 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1576 * @kcontrol: mixer control
1577 * @ucontrol: control element information
1579 * Callback to get the value of a dapm enumerated double mixer control.
1581 * Returns 0 for success.
1583 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1584 struct snd_ctl_elem_value *ucontrol)
1586 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1587 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1588 unsigned short val, bitmask;
1590 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1592 val = snd_soc_read(widget->codec, e->reg);
1593 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1594 if (e->shift_l != e->shift_r)
1595 ucontrol->value.enumerated.item[1] =
1596 (val >> e->shift_r) & (bitmask - 1);
1600 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1603 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1604 * @kcontrol: mixer control
1605 * @ucontrol: control element information
1607 * Callback to set the value of a dapm enumerated double mixer control.
1609 * Returns 0 for success.
1611 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1612 struct snd_ctl_elem_value *ucontrol)
1614 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1615 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1616 unsigned short val, mux;
1617 unsigned short mask, bitmask;
1620 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1622 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1624 mux = ucontrol->value.enumerated.item[0];
1625 val = mux << e->shift_l;
1626 mask = (bitmask - 1) << e->shift_l;
1627 if (e->shift_l != e->shift_r) {
1628 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1630 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1631 mask |= (bitmask - 1) << e->shift_r;
1634 mutex_lock(&widget->codec->mutex);
1635 widget->value = val;
1636 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1637 if (widget->event) {
1638 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1639 ret = widget->event(widget,
1640 kcontrol, SND_SOC_DAPM_PRE_REG);
1644 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1645 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1646 ret = widget->event(widget,
1647 kcontrol, SND_SOC_DAPM_POST_REG);
1649 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1652 mutex_unlock(&widget->codec->mutex);
1655 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1658 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1660 * @kcontrol: mixer control
1661 * @ucontrol: control element information
1663 * Callback to get the value of a dapm semi enumerated double mixer control.
1665 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1666 * used for handling bitfield coded enumeration for example.
1668 * Returns 0 for success.
1670 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1671 struct snd_ctl_elem_value *ucontrol)
1673 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1674 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1675 unsigned short reg_val, val, mux;
1677 reg_val = snd_soc_read(widget->codec, e->reg);
1678 val = (reg_val >> e->shift_l) & e->mask;
1679 for (mux = 0; mux < e->max; mux++) {
1680 if (val == e->values[mux])
1683 ucontrol->value.enumerated.item[0] = mux;
1684 if (e->shift_l != e->shift_r) {
1685 val = (reg_val >> e->shift_r) & e->mask;
1686 for (mux = 0; mux < e->max; mux++) {
1687 if (val == e->values[mux])
1690 ucontrol->value.enumerated.item[1] = mux;
1695 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1698 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1700 * @kcontrol: mixer control
1701 * @ucontrol: control element information
1703 * Callback to set the value of a dapm semi enumerated double mixer control.
1705 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1706 * used for handling bitfield coded enumeration for example.
1708 * Returns 0 for success.
1710 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1711 struct snd_ctl_elem_value *ucontrol)
1713 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1714 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1715 unsigned short val, mux;
1716 unsigned short mask;
1719 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1721 mux = ucontrol->value.enumerated.item[0];
1722 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1723 mask = e->mask << e->shift_l;
1724 if (e->shift_l != e->shift_r) {
1725 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1727 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1728 mask |= e->mask << e->shift_r;
1731 mutex_lock(&widget->codec->mutex);
1732 widget->value = val;
1733 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1734 if (widget->event) {
1735 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1736 ret = widget->event(widget,
1737 kcontrol, SND_SOC_DAPM_PRE_REG);
1741 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1742 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1743 ret = widget->event(widget,
1744 kcontrol, SND_SOC_DAPM_POST_REG);
1746 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1749 mutex_unlock(&widget->codec->mutex);
1752 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1755 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1757 * @kcontrol: mixer control
1758 * @uinfo: control element information
1760 * Callback to provide information about a pin switch control.
1762 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1763 struct snd_ctl_elem_info *uinfo)
1765 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1767 uinfo->value.integer.min = 0;
1768 uinfo->value.integer.max = 1;
1772 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1775 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1777 * @kcontrol: mixer control
1780 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1781 struct snd_ctl_elem_value *ucontrol)
1783 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1784 const char *pin = (const char *)kcontrol->private_value;
1786 mutex_lock(&codec->mutex);
1788 ucontrol->value.integer.value[0] =
1789 snd_soc_dapm_get_pin_status(codec, pin);
1791 mutex_unlock(&codec->mutex);
1795 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1798 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1800 * @kcontrol: mixer control
1803 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
1804 struct snd_ctl_elem_value *ucontrol)
1806 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1807 const char *pin = (const char *)kcontrol->private_value;
1809 mutex_lock(&codec->mutex);
1811 if (ucontrol->value.integer.value[0])
1812 snd_soc_dapm_enable_pin(codec, pin);
1814 snd_soc_dapm_disable_pin(codec, pin);
1816 snd_soc_dapm_sync(codec);
1818 mutex_unlock(&codec->mutex);
1822 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
1825 * snd_soc_dapm_new_control - create new dapm control
1826 * @codec: audio codec
1827 * @widget: widget template
1829 * Creates a new dapm control based upon the template.
1831 * Returns 0 for success else error.
1833 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1834 const struct snd_soc_dapm_widget *widget)
1836 struct snd_soc_dapm_widget *w;
1838 if ((w = dapm_cnew_widget(widget)) == NULL)
1842 INIT_LIST_HEAD(&w->sources);
1843 INIT_LIST_HEAD(&w->sinks);
1844 INIT_LIST_HEAD(&w->list);
1845 list_add(&w->list, &codec->dapm_widgets);
1847 /* machine layer set ups unconnected pins and insertions */
1851 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1854 * snd_soc_dapm_new_controls - create new dapm controls
1855 * @codec: audio codec
1856 * @widget: widget array
1857 * @num: number of widgets
1859 * Creates new DAPM controls based upon the templates.
1861 * Returns 0 for success else error.
1863 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1864 const struct snd_soc_dapm_widget *widget,
1869 for (i = 0; i < num; i++) {
1870 ret = snd_soc_dapm_new_control(codec, widget);
1873 "ASoC: Failed to create DAPM control %s: %d\n",
1881 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1885 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1886 * @codec: audio codec
1887 * @stream: stream name
1888 * @event: stream event
1890 * Sends a stream event to the dapm core. The core then makes any
1891 * necessary widget power changes.
1893 * Returns 0 for success else error.
1895 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1896 char *stream, int event)
1898 struct snd_soc_dapm_widget *w;
1903 mutex_lock(&codec->mutex);
1904 list_for_each_entry(w, &codec->dapm_widgets, list)
1908 pr_debug("widget %s\n %s stream %s event %d\n",
1909 w->name, w->sname, stream, event);
1910 if (strstr(w->sname, stream)) {
1912 case SND_SOC_DAPM_STREAM_START:
1915 case SND_SOC_DAPM_STREAM_STOP:
1918 case SND_SOC_DAPM_STREAM_SUSPEND:
1923 case SND_SOC_DAPM_STREAM_RESUME:
1929 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
1931 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
1936 mutex_unlock(&codec->mutex);
1938 dapm_power_widgets(codec, event);
1939 dump_dapm(codec, __func__);
1942 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
1945 * snd_soc_dapm_enable_pin - enable pin.
1949 * Enables input/output pin and its parents or children widgets iff there is
1950 * a valid audio route and active audio stream.
1951 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1952 * do any widget power switching.
1954 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
1956 return snd_soc_dapm_set_pin(codec, pin, 1);
1958 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
1961 * snd_soc_dapm_disable_pin - disable pin.
1965 * Disables input/output pin and its parents or children widgets.
1966 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1967 * do any widget power switching.
1969 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
1971 return snd_soc_dapm_set_pin(codec, pin, 0);
1973 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
1976 * snd_soc_dapm_nc_pin - permanently disable pin.
1980 * Marks the specified pin as being not connected, disabling it along
1981 * any parent or child widgets. At present this is identical to
1982 * snd_soc_dapm_disable_pin() but in future it will be extended to do
1983 * additional things such as disabling controls which only affect
1984 * paths through the pin.
1986 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1987 * do any widget power switching.
1989 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
1991 return snd_soc_dapm_set_pin(codec, pin, 0);
1993 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
1996 * snd_soc_dapm_get_pin_status - get audio pin status
1997 * @codec: audio codec
1998 * @pin: audio signal pin endpoint (or start point)
2000 * Get audio pin status - connected or disconnected.
2002 * Returns 1 for connected otherwise 0.
2004 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
2006 struct snd_soc_dapm_widget *w;
2008 list_for_each_entry(w, &codec->dapm_widgets, list) {
2009 if (!strcmp(w->name, pin))
2010 return w->connected;
2015 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2018 * snd_soc_dapm_free - free dapm resources
2019 * @socdev: SoC device
2021 * Free all dapm widgets and resources.
2023 void snd_soc_dapm_free(struct snd_soc_device *socdev)
2025 struct snd_soc_codec *codec = socdev->card->codec;
2027 snd_soc_dapm_sys_remove(socdev->dev);
2028 dapm_free_widgets(codec);
2030 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2032 /* Module information */
2033 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2034 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2035 MODULE_LICENSE("GPL");