2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <linux/debugfs.h>
41 #include <sound/core.h>
42 #include <sound/pcm.h>
43 #include <sound/pcm_params.h>
44 #include <sound/soc-dapm.h>
45 #include <sound/initval.h>
49 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
51 #define dump_dapm(codec, action)
54 /* dapm power sequences - make this per codec in the future */
55 static int dapm_up_seq[] = {
56 [snd_soc_dapm_pre] = 0,
57 [snd_soc_dapm_supply] = 1,
58 [snd_soc_dapm_micbias] = 2,
59 [snd_soc_dapm_aif_in] = 3,
60 [snd_soc_dapm_aif_out] = 3,
61 [snd_soc_dapm_mic] = 4,
62 [snd_soc_dapm_mux] = 5,
63 [snd_soc_dapm_value_mux] = 5,
64 [snd_soc_dapm_dac] = 6,
65 [snd_soc_dapm_mixer] = 7,
66 [snd_soc_dapm_mixer_named_ctl] = 7,
67 [snd_soc_dapm_pga] = 8,
68 [snd_soc_dapm_adc] = 9,
69 [snd_soc_dapm_hp] = 10,
70 [snd_soc_dapm_spk] = 10,
71 [snd_soc_dapm_post] = 11,
74 static int dapm_down_seq[] = {
75 [snd_soc_dapm_pre] = 0,
76 [snd_soc_dapm_adc] = 1,
77 [snd_soc_dapm_hp] = 2,
78 [snd_soc_dapm_spk] = 2,
79 [snd_soc_dapm_pga] = 4,
80 [snd_soc_dapm_mixer_named_ctl] = 5,
81 [snd_soc_dapm_mixer] = 5,
82 [snd_soc_dapm_dac] = 6,
83 [snd_soc_dapm_mic] = 7,
84 [snd_soc_dapm_micbias] = 8,
85 [snd_soc_dapm_mux] = 9,
86 [snd_soc_dapm_value_mux] = 9,
87 [snd_soc_dapm_aif_in] = 10,
88 [snd_soc_dapm_aif_out] = 10,
89 [snd_soc_dapm_supply] = 11,
90 [snd_soc_dapm_post] = 12,
93 static void pop_wait(u32 pop_time)
96 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
99 static void pop_dbg(u32 pop_time, const char *fmt, ...)
113 /* create a new dapm widget */
114 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
115 const struct snd_soc_dapm_widget *_widget)
117 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
121 * snd_soc_dapm_set_bias_level - set the bias level for the system
122 * @socdev: audio device
123 * @level: level to configure
125 * Configure the bias (power) levels for the SoC audio device.
127 * Returns 0 for success else error.
129 static int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
130 enum snd_soc_bias_level level)
132 struct snd_soc_card *card = socdev->card;
133 struct snd_soc_codec *codec = socdev->card->codec;
137 case SND_SOC_BIAS_ON:
138 dev_dbg(socdev->dev, "Setting full bias\n");
140 case SND_SOC_BIAS_PREPARE:
141 dev_dbg(socdev->dev, "Setting bias prepare\n");
143 case SND_SOC_BIAS_STANDBY:
144 dev_dbg(socdev->dev, "Setting standby bias\n");
146 case SND_SOC_BIAS_OFF:
147 dev_dbg(socdev->dev, "Setting bias off\n");
150 dev_err(socdev->dev, "Setting invalid bias %d\n", level);
154 if (card->set_bias_level)
155 ret = card->set_bias_level(card, level);
157 if (codec->set_bias_level)
158 ret = codec->set_bias_level(codec, level);
160 codec->bias_level = level;
166 /* set up initial codec paths */
167 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
168 struct snd_soc_dapm_path *p, int i)
171 case snd_soc_dapm_switch:
172 case snd_soc_dapm_mixer:
173 case snd_soc_dapm_mixer_named_ctl: {
175 struct soc_mixer_control *mc = (struct soc_mixer_control *)
176 w->kcontrols[i].private_value;
177 unsigned int reg = mc->reg;
178 unsigned int shift = mc->shift;
180 unsigned int mask = (1 << fls(max)) - 1;
181 unsigned int invert = mc->invert;
183 val = snd_soc_read(w->codec, reg);
184 val = (val >> shift) & mask;
186 if ((invert && !val) || (!invert && val))
192 case snd_soc_dapm_mux: {
193 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
194 int val, item, bitmask;
196 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
198 val = snd_soc_read(w->codec, e->reg);
199 item = (val >> e->shift_l) & (bitmask - 1);
202 for (i = 0; i < e->max; i++) {
203 if (!(strcmp(p->name, e->texts[i])) && item == i)
208 case snd_soc_dapm_value_mux: {
209 struct soc_enum *e = (struct soc_enum *)
210 w->kcontrols[i].private_value;
213 val = snd_soc_read(w->codec, e->reg);
214 val = (val >> e->shift_l) & e->mask;
215 for (item = 0; item < e->max; item++) {
216 if (val == e->values[item])
221 for (i = 0; i < e->max; i++) {
222 if (!(strcmp(p->name, e->texts[i])) && item == i)
227 /* does not effect routing - always connected */
228 case snd_soc_dapm_pga:
229 case snd_soc_dapm_output:
230 case snd_soc_dapm_adc:
231 case snd_soc_dapm_input:
232 case snd_soc_dapm_dac:
233 case snd_soc_dapm_micbias:
234 case snd_soc_dapm_vmid:
235 case snd_soc_dapm_supply:
236 case snd_soc_dapm_aif_in:
237 case snd_soc_dapm_aif_out:
240 /* does effect routing - dynamically connected */
241 case snd_soc_dapm_hp:
242 case snd_soc_dapm_mic:
243 case snd_soc_dapm_spk:
244 case snd_soc_dapm_line:
245 case snd_soc_dapm_pre:
246 case snd_soc_dapm_post:
252 /* connect mux widget to its interconnecting audio paths */
253 static int dapm_connect_mux(struct snd_soc_codec *codec,
254 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
255 struct snd_soc_dapm_path *path, const char *control_name,
256 const struct snd_kcontrol_new *kcontrol)
258 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
261 for (i = 0; i < e->max; i++) {
262 if (!(strcmp(control_name, e->texts[i]))) {
263 list_add(&path->list, &codec->dapm_paths);
264 list_add(&path->list_sink, &dest->sources);
265 list_add(&path->list_source, &src->sinks);
266 path->name = (char*)e->texts[i];
267 dapm_set_path_status(dest, path, 0);
275 /* connect mixer widget to its interconnecting audio paths */
276 static int dapm_connect_mixer(struct snd_soc_codec *codec,
277 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
278 struct snd_soc_dapm_path *path, const char *control_name)
282 /* search for mixer kcontrol */
283 for (i = 0; i < dest->num_kcontrols; i++) {
284 if (!strcmp(control_name, dest->kcontrols[i].name)) {
285 list_add(&path->list, &codec->dapm_paths);
286 list_add(&path->list_sink, &dest->sources);
287 list_add(&path->list_source, &src->sinks);
288 path->name = dest->kcontrols[i].name;
289 dapm_set_path_status(dest, path, i);
296 /* update dapm codec register bits */
297 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
300 unsigned int old, new;
301 struct snd_soc_codec *codec = widget->codec;
303 /* check for valid widgets */
304 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
305 widget->id == snd_soc_dapm_output ||
306 widget->id == snd_soc_dapm_hp ||
307 widget->id == snd_soc_dapm_mic ||
308 widget->id == snd_soc_dapm_line ||
309 widget->id == snd_soc_dapm_spk)
312 power = widget->power;
314 power = (power ? 0:1);
316 old = snd_soc_read(codec, widget->reg);
317 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
321 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
322 widget->name, widget->power ? "on" : "off",
324 snd_soc_write(codec, widget->reg, new);
325 pop_wait(codec->pop_time);
327 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
332 /* ramps the volume up or down to minimise pops before or after a
333 * DAPM power event */
334 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
336 const struct snd_kcontrol_new *k = widget->kcontrols;
338 if (widget->muted && !power)
340 if (!widget->muted && power)
343 if (widget->num_kcontrols && k) {
344 struct soc_mixer_control *mc =
345 (struct soc_mixer_control *)k->private_value;
346 unsigned int reg = mc->reg;
347 unsigned int shift = mc->shift;
349 unsigned int mask = (1 << fls(max)) - 1;
350 unsigned int invert = mc->invert;
354 /* power up has happended, increase volume to last level */
356 for (i = max; i > widget->saved_value; i--)
357 snd_soc_update_bits(widget->codec, reg, mask, i);
359 for (i = 0; i < widget->saved_value; i++)
360 snd_soc_update_bits(widget->codec, reg, mask, i);
364 /* power down is about to occur, decrease volume to mute */
365 int val = snd_soc_read(widget->codec, reg);
366 int i = widget->saved_value = (val >> shift) & mask;
368 for (; i < mask; i++)
369 snd_soc_update_bits(widget->codec, reg, mask, i);
372 snd_soc_update_bits(widget->codec, reg, mask, i);
380 /* create new dapm mixer control */
381 static int dapm_new_mixer(struct snd_soc_codec *codec,
382 struct snd_soc_dapm_widget *w)
386 struct snd_soc_dapm_path *path;
389 for (i = 0; i < w->num_kcontrols; i++) {
392 list_for_each_entry(path, &w->sources, list_sink) {
394 /* mixer/mux paths name must match control name */
395 if (path->name != (char*)w->kcontrols[i].name)
398 /* add dapm control with long name.
399 * for dapm_mixer this is the concatenation of the
400 * mixer and kcontrol name.
401 * for dapm_mixer_named_ctl this is simply the
404 name_len = strlen(w->kcontrols[i].name) + 1;
405 if (w->id != snd_soc_dapm_mixer_named_ctl)
406 name_len += 1 + strlen(w->name);
408 path->long_name = kmalloc(name_len, GFP_KERNEL);
410 if (path->long_name == NULL)
415 snprintf(path->long_name, name_len, "%s %s",
416 w->name, w->kcontrols[i].name);
418 case snd_soc_dapm_mixer_named_ctl:
419 snprintf(path->long_name, name_len, "%s",
420 w->kcontrols[i].name);
424 path->long_name[name_len - 1] = '\0';
426 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
428 ret = snd_ctl_add(codec->card, path->kcontrol);
430 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s: %d\n",
433 kfree(path->long_name);
434 path->long_name = NULL;
442 /* create new dapm mux control */
443 static int dapm_new_mux(struct snd_soc_codec *codec,
444 struct snd_soc_dapm_widget *w)
446 struct snd_soc_dapm_path *path = NULL;
447 struct snd_kcontrol *kcontrol;
450 if (!w->num_kcontrols) {
451 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
455 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
456 ret = snd_ctl_add(codec->card, kcontrol);
460 list_for_each_entry(path, &w->sources, list_sink)
461 path->kcontrol = kcontrol;
466 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
470 /* create new dapm volume control */
471 static int dapm_new_pga(struct snd_soc_codec *codec,
472 struct snd_soc_dapm_widget *w)
474 struct snd_kcontrol *kcontrol;
477 if (!w->num_kcontrols)
480 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
481 ret = snd_ctl_add(codec->card, kcontrol);
483 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
490 /* reset 'walked' bit for each dapm path */
491 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
493 struct snd_soc_dapm_path *p;
495 list_for_each_entry(p, &codec->dapm_paths, list)
500 * Recursively check for a completed path to an active or physically connected
501 * output widget. Returns number of complete paths.
503 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
505 struct snd_soc_dapm_path *path;
508 if (widget->id == snd_soc_dapm_supply)
511 switch (widget->id) {
512 case snd_soc_dapm_adc:
513 case snd_soc_dapm_aif_out:
520 if (widget->connected) {
521 /* connected pin ? */
522 if (widget->id == snd_soc_dapm_output && !widget->ext)
525 /* connected jack or spk ? */
526 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
527 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
531 list_for_each_entry(path, &widget->sinks, list_source) {
535 if (path->sink && path->connect) {
537 con += is_connected_output_ep(path->sink);
545 * Recursively check for a completed path to an active or physically connected
546 * input widget. Returns number of complete paths.
548 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
550 struct snd_soc_dapm_path *path;
553 if (widget->id == snd_soc_dapm_supply)
556 /* active stream ? */
557 switch (widget->id) {
558 case snd_soc_dapm_dac:
559 case snd_soc_dapm_aif_in:
566 if (widget->connected) {
567 /* connected pin ? */
568 if (widget->id == snd_soc_dapm_input && !widget->ext)
571 /* connected VMID/Bias for lower pops */
572 if (widget->id == snd_soc_dapm_vmid)
575 /* connected jack ? */
576 if (widget->id == snd_soc_dapm_mic ||
577 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
581 list_for_each_entry(path, &widget->sources, list_sink) {
585 if (path->source && path->connect) {
587 con += is_connected_input_ep(path->source);
595 * Handler for generic register modifier widget.
597 int dapm_reg_event(struct snd_soc_dapm_widget *w,
598 struct snd_kcontrol *kcontrol, int event)
602 if (SND_SOC_DAPM_EVENT_ON(event))
607 snd_soc_update_bits(w->codec, -(w->reg + 1),
608 w->mask << w->shift, val << w->shift);
612 EXPORT_SYMBOL_GPL(dapm_reg_event);
614 /* Standard power change method, used to apply power changes to most
617 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
621 /* call any power change event handlers */
623 pr_debug("power %s event for %s flags %x\n",
624 w->power ? "on" : "off",
625 w->name, w->event_flags);
627 /* power up pre event */
628 if (w->power && w->event &&
629 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
630 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
635 /* power down pre event */
636 if (!w->power && w->event &&
637 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
638 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
643 /* Lower PGA volume to reduce pops */
644 if (w->id == snd_soc_dapm_pga && !w->power)
645 dapm_set_pga(w, w->power);
649 /* Raise PGA volume to reduce pops */
650 if (w->id == snd_soc_dapm_pga && w->power)
651 dapm_set_pga(w, w->power);
653 /* power up post event */
654 if (w->power && w->event &&
655 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
657 NULL, SND_SOC_DAPM_POST_PMU);
662 /* power down post event */
663 if (!w->power && w->event &&
664 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
665 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
673 /* Generic check to see if a widget should be powered.
675 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
679 in = is_connected_input_ep(w);
680 dapm_clear_walk(w->codec);
681 out = is_connected_output_ep(w);
682 dapm_clear_walk(w->codec);
683 return out != 0 && in != 0;
686 /* Check to see if an ADC has power */
687 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
692 in = is_connected_input_ep(w);
693 dapm_clear_walk(w->codec);
696 return dapm_generic_check_power(w);
700 /* Check to see if a DAC has power */
701 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
706 out = is_connected_output_ep(w);
707 dapm_clear_walk(w->codec);
710 return dapm_generic_check_power(w);
714 /* Check to see if a power supply is needed */
715 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
717 struct snd_soc_dapm_path *path;
720 /* Check if one of our outputs is connected */
721 list_for_each_entry(path, &w->sinks, list_source) {
722 if (path->connected &&
723 !path->connected(path->source, path->sink))
726 if (path->sink && path->sink->power_check &&
727 path->sink->power_check(path->sink)) {
733 dapm_clear_walk(w->codec);
738 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
739 struct snd_soc_dapm_widget *b,
742 if (sort[a->id] != sort[b->id])
743 return sort[a->id] - sort[b->id];
744 if (a->reg != b->reg)
745 return a->reg - b->reg;
750 /* Insert a widget in order into a DAPM power sequence. */
751 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
752 struct list_head *list,
755 struct snd_soc_dapm_widget *w;
757 list_for_each_entry(w, list, power_list)
758 if (dapm_seq_compare(new_widget, w, sort) < 0) {
759 list_add_tail(&new_widget->power_list, &w->power_list);
763 list_add_tail(&new_widget->power_list, list);
766 /* Apply the coalesced changes from a DAPM sequence */
767 static void dapm_seq_run_coalesced(struct snd_soc_codec *codec,
768 struct list_head *pending)
770 struct snd_soc_dapm_widget *w;
772 unsigned int value = 0;
773 unsigned int mask = 0;
774 unsigned int cur_mask;
776 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
779 list_for_each_entry(w, pending, power_list) {
780 cur_mask = 1 << w->shift;
781 BUG_ON(reg != w->reg);
792 pop_dbg(codec->pop_time,
793 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
794 w->name, reg, value, mask);
796 /* power up pre event */
797 if (w->power && w->event &&
798 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
799 pop_dbg(codec->pop_time, "pop test : %s PRE_PMU\n",
801 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
803 pr_err("%s: pre event failed: %d\n",
807 /* power down pre event */
808 if (!w->power && w->event &&
809 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
810 pop_dbg(codec->pop_time, "pop test : %s PRE_PMD\n",
812 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
814 pr_err("%s: pre event failed: %d\n",
818 /* Lower PGA volume to reduce pops */
819 if (w->id == snd_soc_dapm_pga && !w->power)
820 dapm_set_pga(w, w->power);
824 pop_dbg(codec->pop_time,
825 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
826 value, mask, reg, codec->pop_time);
827 pop_wait(codec->pop_time);
828 snd_soc_update_bits(codec, reg, mask, value);
831 list_for_each_entry(w, pending, power_list) {
832 /* Raise PGA volume to reduce pops */
833 if (w->id == snd_soc_dapm_pga && w->power)
834 dapm_set_pga(w, w->power);
836 /* power up post event */
837 if (w->power && w->event &&
838 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
839 pop_dbg(codec->pop_time, "pop test : %s POST_PMU\n",
842 NULL, SND_SOC_DAPM_POST_PMU);
844 pr_err("%s: post event failed: %d\n",
848 /* power down post event */
849 if (!w->power && w->event &&
850 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
851 pop_dbg(codec->pop_time, "pop test : %s POST_PMD\n",
853 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
855 pr_err("%s: post event failed: %d\n",
861 /* Apply a DAPM power sequence.
863 * We walk over a pre-sorted list of widgets to apply power to. In
864 * order to minimise the number of writes to the device required
865 * multiple widgets will be updated in a single write where possible.
866 * Currently anything that requires more than a single write is not
869 static void dapm_seq_run(struct snd_soc_codec *codec, struct list_head *list,
870 int event, int sort[])
872 struct snd_soc_dapm_widget *w, *n;
875 int cur_reg = SND_SOC_NOPM;
878 list_for_each_entry_safe(w, n, list, power_list) {
881 /* Do we need to apply any queued changes? */
882 if (sort[w->id] != cur_sort || w->reg != cur_reg) {
883 if (!list_empty(&pending))
884 dapm_seq_run_coalesced(codec, &pending);
886 INIT_LIST_HEAD(&pending);
888 cur_reg = SND_SOC_NOPM;
892 case snd_soc_dapm_pre:
894 list_for_each_entry_safe_continue(w, n, list,
897 if (event == SND_SOC_DAPM_STREAM_START)
899 NULL, SND_SOC_DAPM_PRE_PMU);
900 else if (event == SND_SOC_DAPM_STREAM_STOP)
902 NULL, SND_SOC_DAPM_PRE_PMD);
905 case snd_soc_dapm_post:
907 list_for_each_entry_safe_continue(w, n, list,
910 if (event == SND_SOC_DAPM_STREAM_START)
912 NULL, SND_SOC_DAPM_POST_PMU);
913 else if (event == SND_SOC_DAPM_STREAM_STOP)
915 NULL, SND_SOC_DAPM_POST_PMD);
918 case snd_soc_dapm_input:
919 case snd_soc_dapm_output:
920 case snd_soc_dapm_hp:
921 case snd_soc_dapm_mic:
922 case snd_soc_dapm_line:
923 case snd_soc_dapm_spk:
924 /* No register support currently */
925 ret = dapm_generic_apply_power(w);
929 /* Queue it up for application */
930 cur_sort = sort[w->id];
932 list_move(&w->power_list, &pending);
937 pr_err("Failed to apply widget power: %d\n",
941 if (!list_empty(&pending))
942 dapm_seq_run_coalesced(codec, &pending);
946 * Scan each dapm widget for complete audio path.
947 * A complete path is a route that has valid endpoints i.e.:-
949 * o DAC to output pin.
950 * o Input Pin to ADC.
951 * o Input pin to Output pin (bypass, sidetone)
952 * o DAC to ADC (loopback).
954 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
956 struct snd_soc_device *socdev = codec->socdev;
957 struct snd_soc_dapm_widget *w;
959 LIST_HEAD(down_list);
964 /* Check which widgets we need to power and store them in
965 * lists indicating if they should be powered up or down.
967 list_for_each_entry(w, &codec->dapm_widgets, list) {
969 case snd_soc_dapm_pre:
970 dapm_seq_insert(w, &down_list, dapm_down_seq);
972 case snd_soc_dapm_post:
973 dapm_seq_insert(w, &up_list, dapm_up_seq);
980 power = w->power_check(w);
984 if (w->power == power)
988 dapm_seq_insert(w, &up_list, dapm_up_seq);
990 dapm_seq_insert(w, &down_list, dapm_down_seq);
997 /* If there are no DAPM widgets then try to figure out power from the
1000 if (list_empty(&codec->dapm_widgets)) {
1002 case SND_SOC_DAPM_STREAM_START:
1003 case SND_SOC_DAPM_STREAM_RESUME:
1006 case SND_SOC_DAPM_STREAM_NOP:
1007 sys_power = codec->bias_level != SND_SOC_BIAS_STANDBY;
1013 /* If we're changing to all on or all off then prepare */
1014 if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
1015 (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {
1016 ret = snd_soc_dapm_set_bias_level(socdev,
1017 SND_SOC_BIAS_PREPARE);
1019 pr_err("Failed to prepare bias: %d\n", ret);
1022 /* Power down widgets first; try to avoid amplifying pops. */
1023 dapm_seq_run(codec, &down_list, event, dapm_down_seq);
1026 dapm_seq_run(codec, &up_list, event, dapm_up_seq);
1028 /* If we just powered the last thing off drop to standby bias */
1029 if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
1030 ret = snd_soc_dapm_set_bias_level(socdev,
1031 SND_SOC_BIAS_STANDBY);
1033 pr_err("Failed to apply standby bias: %d\n", ret);
1036 /* If we just powered up then move to active bias */
1037 if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
1038 ret = snd_soc_dapm_set_bias_level(socdev,
1041 pr_err("Failed to apply active bias: %d\n", ret);
1044 pop_dbg(codec->pop_time, "DAPM sequencing finished, waiting %dms\n",
1051 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
1053 struct snd_soc_dapm_widget *w;
1054 struct snd_soc_dapm_path *p = NULL;
1057 printk("DAPM %s %s\n", codec->name, action);
1059 list_for_each_entry(w, &codec->dapm_widgets, list) {
1061 /* only display widgets that effect routing */
1063 case snd_soc_dapm_pre:
1064 case snd_soc_dapm_post:
1065 case snd_soc_dapm_vmid:
1067 case snd_soc_dapm_mux:
1068 case snd_soc_dapm_value_mux:
1069 case snd_soc_dapm_output:
1070 case snd_soc_dapm_input:
1071 case snd_soc_dapm_switch:
1072 case snd_soc_dapm_hp:
1073 case snd_soc_dapm_mic:
1074 case snd_soc_dapm_spk:
1075 case snd_soc_dapm_line:
1076 case snd_soc_dapm_micbias:
1077 case snd_soc_dapm_dac:
1078 case snd_soc_dapm_adc:
1079 case snd_soc_dapm_pga:
1080 case snd_soc_dapm_mixer:
1081 case snd_soc_dapm_mixer_named_ctl:
1082 case snd_soc_dapm_supply:
1083 case snd_soc_dapm_aif_in:
1084 case snd_soc_dapm_aif_out:
1086 in = is_connected_input_ep(w);
1087 dapm_clear_walk(w->codec);
1088 out = is_connected_output_ep(w);
1089 dapm_clear_walk(w->codec);
1090 printk("%s: %s in %d out %d\n", w->name,
1091 w->power ? "On":"Off",in, out);
1093 list_for_each_entry(p, &w->sources, list_sink) {
1095 printk(" in %s %s\n", p->name ? p->name : "static",
1098 list_for_each_entry(p, &w->sinks, list_source) {
1100 printk(" out %s %s\n", p->name ? p->name : "static",
1110 #ifdef CONFIG_DEBUG_FS
1111 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1113 file->private_data = inode->i_private;
1117 static ssize_t dapm_widget_power_read_file(struct file *file,
1118 char __user *user_buf,
1119 size_t count, loff_t *ppos)
1121 struct snd_soc_dapm_widget *w = file->private_data;
1125 struct snd_soc_dapm_path *p = NULL;
1127 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1131 in = is_connected_input_ep(w);
1132 dapm_clear_walk(w->codec);
1133 out = is_connected_output_ep(w);
1134 dapm_clear_walk(w->codec);
1136 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d\n",
1137 w->name, w->power ? "On" : "Off", in, out);
1140 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1142 w->active ? "active" : "inactive");
1144 list_for_each_entry(p, &w->sources, list_sink) {
1145 if (p->connected && !p->connected(w, p->sink))
1149 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1151 p->name ? p->name : "static",
1154 list_for_each_entry(p, &w->sinks, list_source) {
1155 if (p->connected && !p->connected(w, p->sink))
1159 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1161 p->name ? p->name : "static",
1165 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1171 static const struct file_operations dapm_widget_power_fops = {
1172 .open = dapm_widget_power_open_file,
1173 .read = dapm_widget_power_read_file,
1176 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1178 struct snd_soc_dapm_widget *w;
1181 if (!codec->debugfs_dapm)
1184 list_for_each_entry(w, &codec->dapm_widgets, list) {
1188 d = debugfs_create_file(w->name, 0444,
1189 codec->debugfs_dapm, w,
1190 &dapm_widget_power_fops);
1193 "ASoC: Failed to create %s debugfs file\n",
1198 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1203 /* test and update the power status of a mux widget */
1204 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1205 struct snd_kcontrol *kcontrol, int change,
1206 int mux, struct soc_enum *e)
1208 struct snd_soc_dapm_path *path;
1211 if (widget->id != snd_soc_dapm_mux &&
1212 widget->id != snd_soc_dapm_value_mux)
1218 /* find dapm widget path assoc with kcontrol */
1219 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1220 if (path->kcontrol != kcontrol)
1223 if (!path->name || !e->texts[mux])
1227 /* we now need to match the string in the enum to the path */
1228 if (!(strcmp(path->name, e->texts[mux])))
1229 path->connect = 1; /* new connection */
1231 path->connect = 0; /* old connection must be powered down */
1235 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1236 dump_dapm(widget->codec, "mux power update");
1242 /* test and update the power status of a mixer or switch widget */
1243 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1244 struct snd_kcontrol *kcontrol, int reg,
1245 int val_mask, int val, int invert)
1247 struct snd_soc_dapm_path *path;
1250 if (widget->id != snd_soc_dapm_mixer &&
1251 widget->id != snd_soc_dapm_mixer_named_ctl &&
1252 widget->id != snd_soc_dapm_switch)
1255 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
1258 /* find dapm widget path assoc with kcontrol */
1259 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1260 if (path->kcontrol != kcontrol)
1263 /* found, now check type */
1266 /* new connection */
1267 path->connect = invert ? 0:1;
1269 /* old connection must be powered down */
1270 path->connect = invert ? 1:0;
1275 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1276 dump_dapm(widget->codec, "mixer power update");
1282 /* show dapm widget status in sys fs */
1283 static ssize_t dapm_widget_show(struct device *dev,
1284 struct device_attribute *attr, char *buf)
1286 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1287 struct snd_soc_codec *codec = devdata->card->codec;
1288 struct snd_soc_dapm_widget *w;
1290 char *state = "not set";
1292 list_for_each_entry(w, &codec->dapm_widgets, list) {
1294 /* only display widgets that burnm power */
1296 case snd_soc_dapm_hp:
1297 case snd_soc_dapm_mic:
1298 case snd_soc_dapm_spk:
1299 case snd_soc_dapm_line:
1300 case snd_soc_dapm_micbias:
1301 case snd_soc_dapm_dac:
1302 case snd_soc_dapm_adc:
1303 case snd_soc_dapm_pga:
1304 case snd_soc_dapm_mixer:
1305 case snd_soc_dapm_mixer_named_ctl:
1306 case snd_soc_dapm_supply:
1308 count += sprintf(buf + count, "%s: %s\n",
1309 w->name, w->power ? "On":"Off");
1316 switch (codec->bias_level) {
1317 case SND_SOC_BIAS_ON:
1320 case SND_SOC_BIAS_PREPARE:
1323 case SND_SOC_BIAS_STANDBY:
1326 case SND_SOC_BIAS_OFF:
1330 count += sprintf(buf + count, "PM State: %s\n", state);
1335 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1337 int snd_soc_dapm_sys_add(struct device *dev)
1339 return device_create_file(dev, &dev_attr_dapm_widget);
1342 static void snd_soc_dapm_sys_remove(struct device *dev)
1344 device_remove_file(dev, &dev_attr_dapm_widget);
1347 /* free all dapm widgets and resources */
1348 static void dapm_free_widgets(struct snd_soc_codec *codec)
1350 struct snd_soc_dapm_widget *w, *next_w;
1351 struct snd_soc_dapm_path *p, *next_p;
1353 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
1358 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
1360 kfree(p->long_name);
1365 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
1366 const char *pin, int status)
1368 struct snd_soc_dapm_widget *w;
1370 list_for_each_entry(w, &codec->dapm_widgets, list) {
1371 if (!strcmp(w->name, pin)) {
1372 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
1373 w->connected = status;
1378 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
1383 * snd_soc_dapm_sync - scan and power dapm paths
1384 * @codec: audio codec
1386 * Walks all dapm audio paths and powers widgets according to their
1387 * stream or path usage.
1389 * Returns 0 for success.
1391 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
1393 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1394 dump_dapm(codec, "sync");
1397 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1399 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
1400 const struct snd_soc_dapm_route *route)
1402 struct snd_soc_dapm_path *path;
1403 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1404 const char *sink = route->sink;
1405 const char *control = route->control;
1406 const char *source = route->source;
1409 /* find src and dest widgets */
1410 list_for_each_entry(w, &codec->dapm_widgets, list) {
1412 if (!wsink && !(strcmp(w->name, sink))) {
1416 if (!wsource && !(strcmp(w->name, source))) {
1421 if (wsource == NULL || wsink == NULL)
1424 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1428 path->source = wsource;
1430 path->connected = route->connected;
1431 INIT_LIST_HEAD(&path->list);
1432 INIT_LIST_HEAD(&path->list_source);
1433 INIT_LIST_HEAD(&path->list_sink);
1435 /* check for external widgets */
1436 if (wsink->id == snd_soc_dapm_input) {
1437 if (wsource->id == snd_soc_dapm_micbias ||
1438 wsource->id == snd_soc_dapm_mic ||
1439 wsource->id == snd_soc_dapm_line ||
1440 wsource->id == snd_soc_dapm_output)
1443 if (wsource->id == snd_soc_dapm_output) {
1444 if (wsink->id == snd_soc_dapm_spk ||
1445 wsink->id == snd_soc_dapm_hp ||
1446 wsink->id == snd_soc_dapm_line ||
1447 wsink->id == snd_soc_dapm_input)
1451 /* connect static paths */
1452 if (control == NULL) {
1453 list_add(&path->list, &codec->dapm_paths);
1454 list_add(&path->list_sink, &wsink->sources);
1455 list_add(&path->list_source, &wsource->sinks);
1460 /* connect dynamic paths */
1462 case snd_soc_dapm_adc:
1463 case snd_soc_dapm_dac:
1464 case snd_soc_dapm_pga:
1465 case snd_soc_dapm_input:
1466 case snd_soc_dapm_output:
1467 case snd_soc_dapm_micbias:
1468 case snd_soc_dapm_vmid:
1469 case snd_soc_dapm_pre:
1470 case snd_soc_dapm_post:
1471 case snd_soc_dapm_supply:
1472 case snd_soc_dapm_aif_in:
1473 case snd_soc_dapm_aif_out:
1474 list_add(&path->list, &codec->dapm_paths);
1475 list_add(&path->list_sink, &wsink->sources);
1476 list_add(&path->list_source, &wsource->sinks);
1479 case snd_soc_dapm_mux:
1480 case snd_soc_dapm_value_mux:
1481 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1482 &wsink->kcontrols[0]);
1486 case snd_soc_dapm_switch:
1487 case snd_soc_dapm_mixer:
1488 case snd_soc_dapm_mixer_named_ctl:
1489 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1493 case snd_soc_dapm_hp:
1494 case snd_soc_dapm_mic:
1495 case snd_soc_dapm_line:
1496 case snd_soc_dapm_spk:
1497 list_add(&path->list, &codec->dapm_paths);
1498 list_add(&path->list_sink, &wsink->sources);
1499 list_add(&path->list_source, &wsource->sinks);
1506 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1513 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1515 * @route: audio routes
1516 * @num: number of routes
1518 * Connects 2 dapm widgets together via a named audio path. The sink is
1519 * the widget receiving the audio signal, whilst the source is the sender
1520 * of the audio signal.
1522 * Returns 0 for success else error. On error all resources can be freed
1523 * with a call to snd_soc_card_free().
1525 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1526 const struct snd_soc_dapm_route *route, int num)
1530 for (i = 0; i < num; i++) {
1531 ret = snd_soc_dapm_add_route(codec, route);
1533 printk(KERN_ERR "Failed to add route %s->%s\n",
1543 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1546 * snd_soc_dapm_new_widgets - add new dapm widgets
1547 * @codec: audio codec
1549 * Checks the codec for any new dapm widgets and creates them if found.
1551 * Returns 0 for success.
1553 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1555 struct snd_soc_dapm_widget *w;
1557 list_for_each_entry(w, &codec->dapm_widgets, list)
1563 case snd_soc_dapm_switch:
1564 case snd_soc_dapm_mixer:
1565 case snd_soc_dapm_mixer_named_ctl:
1566 w->power_check = dapm_generic_check_power;
1567 dapm_new_mixer(codec, w);
1569 case snd_soc_dapm_mux:
1570 case snd_soc_dapm_value_mux:
1571 w->power_check = dapm_generic_check_power;
1572 dapm_new_mux(codec, w);
1574 case snd_soc_dapm_adc:
1575 case snd_soc_dapm_aif_out:
1576 w->power_check = dapm_adc_check_power;
1578 case snd_soc_dapm_dac:
1579 case snd_soc_dapm_aif_in:
1580 w->power_check = dapm_dac_check_power;
1582 case snd_soc_dapm_pga:
1583 w->power_check = dapm_generic_check_power;
1584 dapm_new_pga(codec, w);
1586 case snd_soc_dapm_input:
1587 case snd_soc_dapm_output:
1588 case snd_soc_dapm_micbias:
1589 case snd_soc_dapm_spk:
1590 case snd_soc_dapm_hp:
1591 case snd_soc_dapm_mic:
1592 case snd_soc_dapm_line:
1593 w->power_check = dapm_generic_check_power;
1595 case snd_soc_dapm_supply:
1596 w->power_check = dapm_supply_check_power;
1597 case snd_soc_dapm_vmid:
1598 case snd_soc_dapm_pre:
1599 case snd_soc_dapm_post:
1605 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1608 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1611 * snd_soc_dapm_get_volsw - dapm mixer get callback
1612 * @kcontrol: mixer control
1613 * @ucontrol: control element information
1615 * Callback to get the value of a dapm mixer control.
1617 * Returns 0 for success.
1619 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1620 struct snd_ctl_elem_value *ucontrol)
1622 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1623 struct soc_mixer_control *mc =
1624 (struct soc_mixer_control *)kcontrol->private_value;
1625 unsigned int reg = mc->reg;
1626 unsigned int shift = mc->shift;
1627 unsigned int rshift = mc->rshift;
1629 unsigned int invert = mc->invert;
1630 unsigned int mask = (1 << fls(max)) - 1;
1632 /* return the saved value if we are powered down */
1633 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1634 ucontrol->value.integer.value[0] = widget->saved_value;
1638 ucontrol->value.integer.value[0] =
1639 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1640 if (shift != rshift)
1641 ucontrol->value.integer.value[1] =
1642 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1644 ucontrol->value.integer.value[0] =
1645 max - ucontrol->value.integer.value[0];
1646 if (shift != rshift)
1647 ucontrol->value.integer.value[1] =
1648 max - ucontrol->value.integer.value[1];
1653 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1656 * snd_soc_dapm_put_volsw - dapm mixer set callback
1657 * @kcontrol: mixer control
1658 * @ucontrol: control element information
1660 * Callback to set the value of a dapm mixer control.
1662 * Returns 0 for success.
1664 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1665 struct snd_ctl_elem_value *ucontrol)
1667 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1668 struct soc_mixer_control *mc =
1669 (struct soc_mixer_control *)kcontrol->private_value;
1670 unsigned int reg = mc->reg;
1671 unsigned int shift = mc->shift;
1672 unsigned int rshift = mc->rshift;
1674 unsigned int mask = (1 << fls(max)) - 1;
1675 unsigned int invert = mc->invert;
1676 unsigned int val, val2, val_mask;
1679 val = (ucontrol->value.integer.value[0] & mask);
1683 val_mask = mask << shift;
1685 if (shift != rshift) {
1686 val2 = (ucontrol->value.integer.value[1] & mask);
1689 val_mask |= mask << rshift;
1690 val |= val2 << rshift;
1693 mutex_lock(&widget->codec->mutex);
1694 widget->value = val;
1696 /* save volume value if the widget is powered down */
1697 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1698 widget->saved_value = val;
1699 mutex_unlock(&widget->codec->mutex);
1703 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1704 if (widget->event) {
1705 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1706 ret = widget->event(widget, kcontrol,
1707 SND_SOC_DAPM_PRE_REG);
1713 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1714 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1715 ret = widget->event(widget, kcontrol,
1716 SND_SOC_DAPM_POST_REG);
1718 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1721 mutex_unlock(&widget->codec->mutex);
1724 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1727 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1728 * @kcontrol: mixer control
1729 * @ucontrol: control element information
1731 * Callback to get the value of a dapm enumerated double mixer control.
1733 * Returns 0 for success.
1735 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1736 struct snd_ctl_elem_value *ucontrol)
1738 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1739 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1740 unsigned int val, bitmask;
1742 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1744 val = snd_soc_read(widget->codec, e->reg);
1745 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1746 if (e->shift_l != e->shift_r)
1747 ucontrol->value.enumerated.item[1] =
1748 (val >> e->shift_r) & (bitmask - 1);
1752 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1755 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1756 * @kcontrol: mixer control
1757 * @ucontrol: control element information
1759 * Callback to set the value of a dapm enumerated double mixer control.
1761 * Returns 0 for success.
1763 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1764 struct snd_ctl_elem_value *ucontrol)
1766 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1767 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1768 unsigned int val, mux, change;
1769 unsigned int mask, bitmask;
1772 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1774 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1776 mux = ucontrol->value.enumerated.item[0];
1777 val = mux << e->shift_l;
1778 mask = (bitmask - 1) << e->shift_l;
1779 if (e->shift_l != e->shift_r) {
1780 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1782 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1783 mask |= (bitmask - 1) << e->shift_r;
1786 mutex_lock(&widget->codec->mutex);
1787 widget->value = val;
1788 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1789 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1791 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1792 ret = widget->event(widget,
1793 kcontrol, SND_SOC_DAPM_PRE_REG);
1798 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1800 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1801 ret = widget->event(widget,
1802 kcontrol, SND_SOC_DAPM_POST_REG);
1805 mutex_unlock(&widget->codec->mutex);
1808 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1811 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1812 * @kcontrol: mixer control
1813 * @ucontrol: control element information
1815 * Returns 0 for success.
1817 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
1818 struct snd_ctl_elem_value *ucontrol)
1820 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1822 ucontrol->value.enumerated.item[0] = widget->value;
1826 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
1829 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1830 * @kcontrol: mixer control
1831 * @ucontrol: control element information
1833 * Returns 0 for success.
1835 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
1836 struct snd_ctl_elem_value *ucontrol)
1838 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1839 struct soc_enum *e =
1840 (struct soc_enum *)kcontrol->private_value;
1844 if (ucontrol->value.enumerated.item[0] >= e->max)
1847 mutex_lock(&widget->codec->mutex);
1849 change = widget->value != ucontrol->value.enumerated.item[0];
1850 widget->value = ucontrol->value.enumerated.item[0];
1851 dapm_mux_update_power(widget, kcontrol, change, widget->value, e);
1853 mutex_unlock(&widget->codec->mutex);
1856 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
1859 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1861 * @kcontrol: mixer control
1862 * @ucontrol: control element information
1864 * Callback to get the value of a dapm semi enumerated double mixer control.
1866 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1867 * used for handling bitfield coded enumeration for example.
1869 * Returns 0 for success.
1871 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1872 struct snd_ctl_elem_value *ucontrol)
1874 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1875 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1876 unsigned int reg_val, val, mux;
1878 reg_val = snd_soc_read(widget->codec, e->reg);
1879 val = (reg_val >> e->shift_l) & e->mask;
1880 for (mux = 0; mux < e->max; mux++) {
1881 if (val == e->values[mux])
1884 ucontrol->value.enumerated.item[0] = mux;
1885 if (e->shift_l != e->shift_r) {
1886 val = (reg_val >> e->shift_r) & e->mask;
1887 for (mux = 0; mux < e->max; mux++) {
1888 if (val == e->values[mux])
1891 ucontrol->value.enumerated.item[1] = mux;
1896 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1899 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1901 * @kcontrol: mixer control
1902 * @ucontrol: control element information
1904 * Callback to set the value of a dapm semi enumerated double mixer control.
1906 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1907 * used for handling bitfield coded enumeration for example.
1909 * Returns 0 for success.
1911 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1912 struct snd_ctl_elem_value *ucontrol)
1914 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1915 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1916 unsigned int val, mux, change;
1920 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1922 mux = ucontrol->value.enumerated.item[0];
1923 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1924 mask = e->mask << e->shift_l;
1925 if (e->shift_l != e->shift_r) {
1926 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1928 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1929 mask |= e->mask << e->shift_r;
1932 mutex_lock(&widget->codec->mutex);
1933 widget->value = val;
1934 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1935 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1937 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1938 ret = widget->event(widget,
1939 kcontrol, SND_SOC_DAPM_PRE_REG);
1944 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1946 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1947 ret = widget->event(widget,
1948 kcontrol, SND_SOC_DAPM_POST_REG);
1951 mutex_unlock(&widget->codec->mutex);
1954 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1957 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1959 * @kcontrol: mixer control
1960 * @uinfo: control element information
1962 * Callback to provide information about a pin switch control.
1964 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1965 struct snd_ctl_elem_info *uinfo)
1967 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1969 uinfo->value.integer.min = 0;
1970 uinfo->value.integer.max = 1;
1974 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1977 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1979 * @kcontrol: mixer control
1982 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1983 struct snd_ctl_elem_value *ucontrol)
1985 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1986 const char *pin = (const char *)kcontrol->private_value;
1988 mutex_lock(&codec->mutex);
1990 ucontrol->value.integer.value[0] =
1991 snd_soc_dapm_get_pin_status(codec, pin);
1993 mutex_unlock(&codec->mutex);
1997 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2000 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2002 * @kcontrol: mixer control
2005 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2006 struct snd_ctl_elem_value *ucontrol)
2008 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2009 const char *pin = (const char *)kcontrol->private_value;
2011 mutex_lock(&codec->mutex);
2013 if (ucontrol->value.integer.value[0])
2014 snd_soc_dapm_enable_pin(codec, pin);
2016 snd_soc_dapm_disable_pin(codec, pin);
2018 snd_soc_dapm_sync(codec);
2020 mutex_unlock(&codec->mutex);
2024 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2027 * snd_soc_dapm_new_control - create new dapm control
2028 * @codec: audio codec
2029 * @widget: widget template
2031 * Creates a new dapm control based upon the template.
2033 * Returns 0 for success else error.
2035 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
2036 const struct snd_soc_dapm_widget *widget)
2038 struct snd_soc_dapm_widget *w;
2040 if ((w = dapm_cnew_widget(widget)) == NULL)
2044 INIT_LIST_HEAD(&w->sources);
2045 INIT_LIST_HEAD(&w->sinks);
2046 INIT_LIST_HEAD(&w->list);
2047 list_add(&w->list, &codec->dapm_widgets);
2049 /* machine layer set ups unconnected pins and insertions */
2053 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2056 * snd_soc_dapm_new_controls - create new dapm controls
2057 * @codec: audio codec
2058 * @widget: widget array
2059 * @num: number of widgets
2061 * Creates new DAPM controls based upon the templates.
2063 * Returns 0 for success else error.
2065 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
2066 const struct snd_soc_dapm_widget *widget,
2071 for (i = 0; i < num; i++) {
2072 ret = snd_soc_dapm_new_control(codec, widget);
2075 "ASoC: Failed to create DAPM control %s: %d\n",
2083 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2087 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2088 * @codec: audio codec
2089 * @stream: stream name
2090 * @event: stream event
2092 * Sends a stream event to the dapm core. The core then makes any
2093 * necessary widget power changes.
2095 * Returns 0 for success else error.
2097 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
2098 char *stream, int event)
2100 struct snd_soc_dapm_widget *w;
2105 mutex_lock(&codec->mutex);
2106 list_for_each_entry(w, &codec->dapm_widgets, list)
2110 pr_debug("widget %s\n %s stream %s event %d\n",
2111 w->name, w->sname, stream, event);
2112 if (strstr(w->sname, stream)) {
2114 case SND_SOC_DAPM_STREAM_START:
2117 case SND_SOC_DAPM_STREAM_STOP:
2120 case SND_SOC_DAPM_STREAM_SUSPEND:
2125 case SND_SOC_DAPM_STREAM_RESUME:
2131 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2133 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2139 dapm_power_widgets(codec, event);
2140 mutex_unlock(&codec->mutex);
2141 dump_dapm(codec, __func__);
2144 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2147 * snd_soc_dapm_enable_pin - enable pin.
2151 * Enables input/output pin and its parents or children widgets iff there is
2152 * a valid audio route and active audio stream.
2153 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2154 * do any widget power switching.
2156 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
2158 return snd_soc_dapm_set_pin(codec, pin, 1);
2160 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2163 * snd_soc_dapm_disable_pin - disable pin.
2167 * Disables input/output pin and its parents or children widgets.
2168 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2169 * do any widget power switching.
2171 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
2173 return snd_soc_dapm_set_pin(codec, pin, 0);
2175 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2178 * snd_soc_dapm_nc_pin - permanently disable pin.
2182 * Marks the specified pin as being not connected, disabling it along
2183 * any parent or child widgets. At present this is identical to
2184 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2185 * additional things such as disabling controls which only affect
2186 * paths through the pin.
2188 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2189 * do any widget power switching.
2191 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
2193 return snd_soc_dapm_set_pin(codec, pin, 0);
2195 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2198 * snd_soc_dapm_get_pin_status - get audio pin status
2199 * @codec: audio codec
2200 * @pin: audio signal pin endpoint (or start point)
2202 * Get audio pin status - connected or disconnected.
2204 * Returns 1 for connected otherwise 0.
2206 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
2208 struct snd_soc_dapm_widget *w;
2210 list_for_each_entry(w, &codec->dapm_widgets, list) {
2211 if (!strcmp(w->name, pin))
2212 return w->connected;
2217 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2220 * snd_soc_dapm_free - free dapm resources
2221 * @socdev: SoC device
2223 * Free all dapm widgets and resources.
2225 void snd_soc_dapm_free(struct snd_soc_device *socdev)
2227 struct snd_soc_codec *codec = socdev->card->codec;
2229 snd_soc_dapm_sys_remove(socdev->dev);
2230 dapm_free_widgets(codec);
2232 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2235 * snd_soc_dapm_shutdown - callback for system shutdown
2237 void snd_soc_dapm_shutdown(struct snd_soc_device *socdev)
2239 struct snd_soc_codec *codec = socdev->card->codec;
2240 struct snd_soc_dapm_widget *w;
2241 LIST_HEAD(down_list);
2244 list_for_each_entry(w, &codec->dapm_widgets, list) {
2246 dapm_seq_insert(w, &down_list, dapm_down_seq);
2252 /* If there were no widgets to power down we're already in
2256 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE);
2257 dapm_seq_run(codec, &down_list, 0, dapm_down_seq);
2258 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY);
2261 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF);
2264 /* Module information */
2265 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2266 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2267 MODULE_LICENSE("GPL");