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->sink && path->sink->power_check &&
723 path->sink->power_check(path->sink)) {
729 dapm_clear_walk(w->codec);
734 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
735 struct snd_soc_dapm_widget *b,
738 if (sort[a->id] != sort[b->id])
739 return sort[a->id] - sort[b->id];
740 if (a->reg != b->reg)
741 return a->reg - b->reg;
746 /* Insert a widget in order into a DAPM power sequence. */
747 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
748 struct list_head *list,
751 struct snd_soc_dapm_widget *w;
753 list_for_each_entry(w, list, power_list)
754 if (dapm_seq_compare(new_widget, w, sort) < 0) {
755 list_add_tail(&new_widget->power_list, &w->power_list);
759 list_add_tail(&new_widget->power_list, list);
762 /* Apply the coalesced changes from a DAPM sequence */
763 static void dapm_seq_run_coalesced(struct snd_soc_codec *codec,
764 struct list_head *pending)
766 struct snd_soc_dapm_widget *w;
768 unsigned int value = 0;
769 unsigned int mask = 0;
770 unsigned int cur_mask;
772 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
775 list_for_each_entry(w, pending, power_list) {
776 cur_mask = 1 << w->shift;
777 BUG_ON(reg != w->reg);
788 pop_dbg(codec->pop_time,
789 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
790 w->name, reg, value, mask);
792 /* power up pre event */
793 if (w->power && w->event &&
794 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
795 pop_dbg(codec->pop_time, "pop test : %s PRE_PMU\n",
797 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
799 pr_err("%s: pre event failed: %d\n",
803 /* power down pre event */
804 if (!w->power && w->event &&
805 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
806 pop_dbg(codec->pop_time, "pop test : %s PRE_PMD\n",
808 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
810 pr_err("%s: pre event failed: %d\n",
814 /* Lower PGA volume to reduce pops */
815 if (w->id == snd_soc_dapm_pga && !w->power)
816 dapm_set_pga(w, w->power);
820 pop_dbg(codec->pop_time,
821 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
822 value, mask, reg, codec->pop_time);
823 pop_wait(codec->pop_time);
824 snd_soc_update_bits(codec, reg, mask, value);
827 list_for_each_entry(w, pending, power_list) {
828 /* Raise PGA volume to reduce pops */
829 if (w->id == snd_soc_dapm_pga && w->power)
830 dapm_set_pga(w, w->power);
832 /* power up post event */
833 if (w->power && w->event &&
834 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
835 pop_dbg(codec->pop_time, "pop test : %s POST_PMU\n",
838 NULL, SND_SOC_DAPM_POST_PMU);
840 pr_err("%s: post event failed: %d\n",
844 /* power down post event */
845 if (!w->power && w->event &&
846 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
847 pop_dbg(codec->pop_time, "pop test : %s POST_PMD\n",
849 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
851 pr_err("%s: post event failed: %d\n",
857 /* Apply a DAPM power sequence.
859 * We walk over a pre-sorted list of widgets to apply power to. In
860 * order to minimise the number of writes to the device required
861 * multiple widgets will be updated in a single write where possible.
862 * Currently anything that requires more than a single write is not
865 static void dapm_seq_run(struct snd_soc_codec *codec, struct list_head *list,
866 int event, int sort[])
868 struct snd_soc_dapm_widget *w, *n;
871 int cur_reg = SND_SOC_NOPM;
874 list_for_each_entry_safe(w, n, list, power_list) {
877 /* Do we need to apply any queued changes? */
878 if (sort[w->id] != cur_sort || w->reg != cur_reg) {
879 if (!list_empty(&pending))
880 dapm_seq_run_coalesced(codec, &pending);
882 INIT_LIST_HEAD(&pending);
884 cur_reg = SND_SOC_NOPM;
888 case snd_soc_dapm_pre:
890 list_for_each_entry_safe_continue(w, n, list,
893 if (event == SND_SOC_DAPM_STREAM_START)
895 NULL, SND_SOC_DAPM_PRE_PMU);
896 else if (event == SND_SOC_DAPM_STREAM_STOP)
898 NULL, SND_SOC_DAPM_PRE_PMD);
901 case snd_soc_dapm_post:
903 list_for_each_entry_safe_continue(w, n, list,
906 if (event == SND_SOC_DAPM_STREAM_START)
908 NULL, SND_SOC_DAPM_POST_PMU);
909 else if (event == SND_SOC_DAPM_STREAM_STOP)
911 NULL, SND_SOC_DAPM_POST_PMD);
914 case snd_soc_dapm_input:
915 case snd_soc_dapm_output:
916 case snd_soc_dapm_hp:
917 case snd_soc_dapm_mic:
918 case snd_soc_dapm_line:
919 case snd_soc_dapm_spk:
920 /* No register support currently */
921 ret = dapm_generic_apply_power(w);
925 /* Queue it up for application */
926 cur_sort = sort[w->id];
928 list_move(&w->power_list, &pending);
933 pr_err("Failed to apply widget power: %d\n",
937 if (!list_empty(&pending))
938 dapm_seq_run_coalesced(codec, &pending);
942 * Scan each dapm widget for complete audio path.
943 * A complete path is a route that has valid endpoints i.e.:-
945 * o DAC to output pin.
946 * o Input Pin to ADC.
947 * o Input pin to Output pin (bypass, sidetone)
948 * o DAC to ADC (loopback).
950 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
952 struct snd_soc_device *socdev = codec->socdev;
953 struct snd_soc_dapm_widget *w;
955 LIST_HEAD(down_list);
960 /* Check which widgets we need to power and store them in
961 * lists indicating if they should be powered up or down.
963 list_for_each_entry(w, &codec->dapm_widgets, list) {
965 case snd_soc_dapm_pre:
966 dapm_seq_insert(w, &down_list, dapm_down_seq);
968 case snd_soc_dapm_post:
969 dapm_seq_insert(w, &up_list, dapm_up_seq);
976 /* If we're suspending then pull down all the
979 case SND_SOC_DAPM_STREAM_SUSPEND:
984 power = w->power_check(w);
990 if (w->power == power)
994 dapm_seq_insert(w, &up_list, dapm_up_seq);
996 dapm_seq_insert(w, &down_list, dapm_down_seq);
1003 /* If there are no DAPM widgets then try to figure out power from the
1006 if (list_empty(&codec->dapm_widgets)) {
1008 case SND_SOC_DAPM_STREAM_START:
1009 case SND_SOC_DAPM_STREAM_RESUME:
1012 case SND_SOC_DAPM_STREAM_SUSPEND:
1015 case SND_SOC_DAPM_STREAM_NOP:
1016 sys_power = codec->bias_level != SND_SOC_BIAS_STANDBY;
1023 /* If we're changing to all on or all off then prepare */
1024 if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
1025 (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {
1026 ret = snd_soc_dapm_set_bias_level(socdev,
1027 SND_SOC_BIAS_PREPARE);
1029 pr_err("Failed to prepare bias: %d\n", ret);
1032 /* Power down widgets first; try to avoid amplifying pops. */
1033 dapm_seq_run(codec, &down_list, event, dapm_down_seq);
1036 dapm_seq_run(codec, &up_list, event, dapm_up_seq);
1038 /* If we just powered the last thing off drop to standby bias */
1039 if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
1040 ret = snd_soc_dapm_set_bias_level(socdev,
1041 SND_SOC_BIAS_STANDBY);
1043 pr_err("Failed to apply standby bias: %d\n", ret);
1046 /* If we just powered up then move to active bias */
1047 if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
1048 ret = snd_soc_dapm_set_bias_level(socdev,
1051 pr_err("Failed to apply active bias: %d\n", ret);
1054 pop_dbg(codec->pop_time, "DAPM sequencing finished, waiting %dms\n",
1061 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
1063 struct snd_soc_dapm_widget *w;
1064 struct snd_soc_dapm_path *p = NULL;
1067 printk("DAPM %s %s\n", codec->name, action);
1069 list_for_each_entry(w, &codec->dapm_widgets, list) {
1071 /* only display widgets that effect routing */
1073 case snd_soc_dapm_pre:
1074 case snd_soc_dapm_post:
1075 case snd_soc_dapm_vmid:
1077 case snd_soc_dapm_mux:
1078 case snd_soc_dapm_value_mux:
1079 case snd_soc_dapm_output:
1080 case snd_soc_dapm_input:
1081 case snd_soc_dapm_switch:
1082 case snd_soc_dapm_hp:
1083 case snd_soc_dapm_mic:
1084 case snd_soc_dapm_spk:
1085 case snd_soc_dapm_line:
1086 case snd_soc_dapm_micbias:
1087 case snd_soc_dapm_dac:
1088 case snd_soc_dapm_adc:
1089 case snd_soc_dapm_pga:
1090 case snd_soc_dapm_mixer:
1091 case snd_soc_dapm_mixer_named_ctl:
1092 case snd_soc_dapm_supply:
1093 case snd_soc_dapm_aif_in:
1094 case snd_soc_dapm_aif_out:
1096 in = is_connected_input_ep(w);
1097 dapm_clear_walk(w->codec);
1098 out = is_connected_output_ep(w);
1099 dapm_clear_walk(w->codec);
1100 printk("%s: %s in %d out %d\n", w->name,
1101 w->power ? "On":"Off",in, out);
1103 list_for_each_entry(p, &w->sources, list_sink) {
1105 printk(" in %s %s\n", p->name ? p->name : "static",
1108 list_for_each_entry(p, &w->sinks, list_source) {
1110 printk(" out %s %s\n", p->name ? p->name : "static",
1120 #ifdef CONFIG_DEBUG_FS
1121 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1123 file->private_data = inode->i_private;
1127 static ssize_t dapm_widget_power_read_file(struct file *file,
1128 char __user *user_buf,
1129 size_t count, loff_t *ppos)
1131 struct snd_soc_dapm_widget *w = file->private_data;
1135 struct snd_soc_dapm_path *p = NULL;
1137 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1141 in = is_connected_input_ep(w);
1142 dapm_clear_walk(w->codec);
1143 out = is_connected_output_ep(w);
1144 dapm_clear_walk(w->codec);
1146 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d\n",
1147 w->name, w->power ? "On" : "Off", in, out);
1150 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1152 w->active ? "active" : "inactive");
1154 list_for_each_entry(p, &w->sources, list_sink) {
1156 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1158 p->name ? p->name : "static",
1161 list_for_each_entry(p, &w->sinks, list_source) {
1163 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1165 p->name ? p->name : "static",
1169 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1175 static const struct file_operations dapm_widget_power_fops = {
1176 .open = dapm_widget_power_open_file,
1177 .read = dapm_widget_power_read_file,
1180 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1182 struct snd_soc_dapm_widget *w;
1185 if (!codec->debugfs_dapm)
1188 list_for_each_entry(w, &codec->dapm_widgets, list) {
1192 d = debugfs_create_file(w->name, 0444,
1193 codec->debugfs_dapm, w,
1194 &dapm_widget_power_fops);
1197 "ASoC: Failed to create %s debugfs file\n",
1202 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1207 /* test and update the power status of a mux widget */
1208 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1209 struct snd_kcontrol *kcontrol, int mask,
1210 int mux, int val, struct soc_enum *e)
1212 struct snd_soc_dapm_path *path;
1215 if (widget->id != snd_soc_dapm_mux &&
1216 widget->id != snd_soc_dapm_value_mux)
1219 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
1222 /* find dapm widget path assoc with kcontrol */
1223 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1224 if (path->kcontrol != kcontrol)
1227 if (!path->name || !e->texts[mux])
1231 /* we now need to match the string in the enum to the path */
1232 if (!(strcmp(path->name, e->texts[mux])))
1233 path->connect = 1; /* new connection */
1235 path->connect = 0; /* old connection must be powered down */
1239 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1240 dump_dapm(widget->codec, "mux power update");
1246 /* test and update the power status of a mixer or switch widget */
1247 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1248 struct snd_kcontrol *kcontrol, int reg,
1249 int val_mask, int val, int invert)
1251 struct snd_soc_dapm_path *path;
1254 if (widget->id != snd_soc_dapm_mixer &&
1255 widget->id != snd_soc_dapm_mixer_named_ctl &&
1256 widget->id != snd_soc_dapm_switch)
1259 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
1262 /* find dapm widget path assoc with kcontrol */
1263 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1264 if (path->kcontrol != kcontrol)
1267 /* found, now check type */
1270 /* new connection */
1271 path->connect = invert ? 0:1;
1273 /* old connection must be powered down */
1274 path->connect = invert ? 1:0;
1279 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1280 dump_dapm(widget->codec, "mixer power update");
1286 /* show dapm widget status in sys fs */
1287 static ssize_t dapm_widget_show(struct device *dev,
1288 struct device_attribute *attr, char *buf)
1290 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1291 struct snd_soc_codec *codec = devdata->card->codec;
1292 struct snd_soc_dapm_widget *w;
1294 char *state = "not set";
1296 list_for_each_entry(w, &codec->dapm_widgets, list) {
1298 /* only display widgets that burnm power */
1300 case snd_soc_dapm_hp:
1301 case snd_soc_dapm_mic:
1302 case snd_soc_dapm_spk:
1303 case snd_soc_dapm_line:
1304 case snd_soc_dapm_micbias:
1305 case snd_soc_dapm_dac:
1306 case snd_soc_dapm_adc:
1307 case snd_soc_dapm_pga:
1308 case snd_soc_dapm_mixer:
1309 case snd_soc_dapm_mixer_named_ctl:
1310 case snd_soc_dapm_supply:
1312 count += sprintf(buf + count, "%s: %s\n",
1313 w->name, w->power ? "On":"Off");
1320 switch (codec->bias_level) {
1321 case SND_SOC_BIAS_ON:
1324 case SND_SOC_BIAS_PREPARE:
1327 case SND_SOC_BIAS_STANDBY:
1330 case SND_SOC_BIAS_OFF:
1334 count += sprintf(buf + count, "PM State: %s\n", state);
1339 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1341 int snd_soc_dapm_sys_add(struct device *dev)
1343 return device_create_file(dev, &dev_attr_dapm_widget);
1346 static void snd_soc_dapm_sys_remove(struct device *dev)
1348 device_remove_file(dev, &dev_attr_dapm_widget);
1351 /* free all dapm widgets and resources */
1352 static void dapm_free_widgets(struct snd_soc_codec *codec)
1354 struct snd_soc_dapm_widget *w, *next_w;
1355 struct snd_soc_dapm_path *p, *next_p;
1357 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
1362 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
1364 kfree(p->long_name);
1369 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
1370 const char *pin, int status)
1372 struct snd_soc_dapm_widget *w;
1374 list_for_each_entry(w, &codec->dapm_widgets, list) {
1375 if (!strcmp(w->name, pin)) {
1376 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
1377 w->connected = status;
1382 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
1387 * snd_soc_dapm_sync - scan and power dapm paths
1388 * @codec: audio codec
1390 * Walks all dapm audio paths and powers widgets according to their
1391 * stream or path usage.
1393 * Returns 0 for success.
1395 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
1397 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1398 dump_dapm(codec, "sync");
1401 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1403 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
1404 const char *sink, const char *control, const char *source)
1406 struct snd_soc_dapm_path *path;
1407 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1410 /* find src and dest widgets */
1411 list_for_each_entry(w, &codec->dapm_widgets, list) {
1413 if (!wsink && !(strcmp(w->name, sink))) {
1417 if (!wsource && !(strcmp(w->name, source))) {
1422 if (wsource == NULL || wsink == NULL)
1425 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1429 path->source = wsource;
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->sink,
1532 route->control, route->source);
1534 printk(KERN_ERR "Failed to add route %s->%s\n",
1544 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1547 * snd_soc_dapm_new_widgets - add new dapm widgets
1548 * @codec: audio codec
1550 * Checks the codec for any new dapm widgets and creates them if found.
1552 * Returns 0 for success.
1554 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1556 struct snd_soc_dapm_widget *w;
1558 list_for_each_entry(w, &codec->dapm_widgets, list)
1564 case snd_soc_dapm_switch:
1565 case snd_soc_dapm_mixer:
1566 case snd_soc_dapm_mixer_named_ctl:
1567 w->power_check = dapm_generic_check_power;
1568 dapm_new_mixer(codec, w);
1570 case snd_soc_dapm_mux:
1571 case snd_soc_dapm_value_mux:
1572 w->power_check = dapm_generic_check_power;
1573 dapm_new_mux(codec, w);
1575 case snd_soc_dapm_adc:
1576 case snd_soc_dapm_aif_out:
1577 w->power_check = dapm_adc_check_power;
1579 case snd_soc_dapm_dac:
1580 case snd_soc_dapm_aif_in:
1581 w->power_check = dapm_dac_check_power;
1583 case snd_soc_dapm_pga:
1584 w->power_check = dapm_generic_check_power;
1585 dapm_new_pga(codec, w);
1587 case snd_soc_dapm_input:
1588 case snd_soc_dapm_output:
1589 case snd_soc_dapm_micbias:
1590 case snd_soc_dapm_spk:
1591 case snd_soc_dapm_hp:
1592 case snd_soc_dapm_mic:
1593 case snd_soc_dapm_line:
1594 w->power_check = dapm_generic_check_power;
1596 case snd_soc_dapm_supply:
1597 w->power_check = dapm_supply_check_power;
1598 case snd_soc_dapm_vmid:
1599 case snd_soc_dapm_pre:
1600 case snd_soc_dapm_post:
1606 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1609 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1612 * snd_soc_dapm_get_volsw - dapm mixer get callback
1613 * @kcontrol: mixer control
1614 * @ucontrol: control element information
1616 * Callback to get the value of a dapm mixer control.
1618 * Returns 0 for success.
1620 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1621 struct snd_ctl_elem_value *ucontrol)
1623 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1624 struct soc_mixer_control *mc =
1625 (struct soc_mixer_control *)kcontrol->private_value;
1626 unsigned int reg = mc->reg;
1627 unsigned int shift = mc->shift;
1628 unsigned int rshift = mc->rshift;
1630 unsigned int invert = mc->invert;
1631 unsigned int mask = (1 << fls(max)) - 1;
1633 /* return the saved value if we are powered down */
1634 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1635 ucontrol->value.integer.value[0] = widget->saved_value;
1639 ucontrol->value.integer.value[0] =
1640 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1641 if (shift != rshift)
1642 ucontrol->value.integer.value[1] =
1643 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1645 ucontrol->value.integer.value[0] =
1646 max - ucontrol->value.integer.value[0];
1647 if (shift != rshift)
1648 ucontrol->value.integer.value[1] =
1649 max - ucontrol->value.integer.value[1];
1654 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1657 * snd_soc_dapm_put_volsw - dapm mixer set callback
1658 * @kcontrol: mixer control
1659 * @ucontrol: control element information
1661 * Callback to set the value of a dapm mixer control.
1663 * Returns 0 for success.
1665 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1666 struct snd_ctl_elem_value *ucontrol)
1668 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1669 struct soc_mixer_control *mc =
1670 (struct soc_mixer_control *)kcontrol->private_value;
1671 unsigned int reg = mc->reg;
1672 unsigned int shift = mc->shift;
1673 unsigned int rshift = mc->rshift;
1675 unsigned int mask = (1 << fls(max)) - 1;
1676 unsigned int invert = mc->invert;
1677 unsigned int val, val2, val_mask;
1680 val = (ucontrol->value.integer.value[0] & mask);
1684 val_mask = mask << shift;
1686 if (shift != rshift) {
1687 val2 = (ucontrol->value.integer.value[1] & mask);
1690 val_mask |= mask << rshift;
1691 val |= val2 << rshift;
1694 mutex_lock(&widget->codec->mutex);
1695 widget->value = val;
1697 /* save volume value if the widget is powered down */
1698 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1699 widget->saved_value = val;
1700 mutex_unlock(&widget->codec->mutex);
1704 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1705 if (widget->event) {
1706 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1707 ret = widget->event(widget, kcontrol,
1708 SND_SOC_DAPM_PRE_REG);
1714 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1715 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1716 ret = widget->event(widget, kcontrol,
1717 SND_SOC_DAPM_POST_REG);
1719 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1722 mutex_unlock(&widget->codec->mutex);
1725 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1728 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1729 * @kcontrol: mixer control
1730 * @ucontrol: control element information
1732 * Callback to get the value of a dapm enumerated double mixer control.
1734 * Returns 0 for success.
1736 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1737 struct snd_ctl_elem_value *ucontrol)
1739 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1740 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1741 unsigned int val, bitmask;
1743 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1745 val = snd_soc_read(widget->codec, e->reg);
1746 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1747 if (e->shift_l != e->shift_r)
1748 ucontrol->value.enumerated.item[1] =
1749 (val >> e->shift_r) & (bitmask - 1);
1753 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1756 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1757 * @kcontrol: mixer control
1758 * @ucontrol: control element information
1760 * Callback to set the value of a dapm enumerated double mixer control.
1762 * Returns 0 for success.
1764 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1765 struct snd_ctl_elem_value *ucontrol)
1767 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1768 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1769 unsigned int val, mux;
1770 unsigned int mask, bitmask;
1773 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1775 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1777 mux = ucontrol->value.enumerated.item[0];
1778 val = mux << e->shift_l;
1779 mask = (bitmask - 1) << e->shift_l;
1780 if (e->shift_l != e->shift_r) {
1781 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1783 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1784 mask |= (bitmask - 1) << e->shift_r;
1787 mutex_lock(&widget->codec->mutex);
1788 widget->value = val;
1789 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1790 if (widget->event) {
1791 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1792 ret = widget->event(widget,
1793 kcontrol, SND_SOC_DAPM_PRE_REG);
1797 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1798 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1799 ret = widget->event(widget,
1800 kcontrol, SND_SOC_DAPM_POST_REG);
1802 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1805 mutex_unlock(&widget->codec->mutex);
1808 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1811 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1813 * @kcontrol: mixer control
1814 * @ucontrol: control element information
1816 * Callback to get the value of a dapm semi enumerated double mixer control.
1818 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1819 * used for handling bitfield coded enumeration for example.
1821 * Returns 0 for success.
1823 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1824 struct snd_ctl_elem_value *ucontrol)
1826 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1827 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1828 unsigned int reg_val, val, mux;
1830 reg_val = snd_soc_read(widget->codec, e->reg);
1831 val = (reg_val >> e->shift_l) & e->mask;
1832 for (mux = 0; mux < e->max; mux++) {
1833 if (val == e->values[mux])
1836 ucontrol->value.enumerated.item[0] = mux;
1837 if (e->shift_l != e->shift_r) {
1838 val = (reg_val >> e->shift_r) & e->mask;
1839 for (mux = 0; mux < e->max; mux++) {
1840 if (val == e->values[mux])
1843 ucontrol->value.enumerated.item[1] = mux;
1848 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1851 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1853 * @kcontrol: mixer control
1854 * @ucontrol: control element information
1856 * Callback to set the value of a dapm semi enumerated double mixer control.
1858 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1859 * used for handling bitfield coded enumeration for example.
1861 * Returns 0 for success.
1863 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1864 struct snd_ctl_elem_value *ucontrol)
1866 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1867 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1868 unsigned int val, mux;
1872 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1874 mux = ucontrol->value.enumerated.item[0];
1875 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1876 mask = e->mask << e->shift_l;
1877 if (e->shift_l != e->shift_r) {
1878 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1880 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1881 mask |= e->mask << e->shift_r;
1884 mutex_lock(&widget->codec->mutex);
1885 widget->value = val;
1886 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1887 if (widget->event) {
1888 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1889 ret = widget->event(widget,
1890 kcontrol, SND_SOC_DAPM_PRE_REG);
1894 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1895 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1896 ret = widget->event(widget,
1897 kcontrol, SND_SOC_DAPM_POST_REG);
1899 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1902 mutex_unlock(&widget->codec->mutex);
1905 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1908 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1910 * @kcontrol: mixer control
1911 * @uinfo: control element information
1913 * Callback to provide information about a pin switch control.
1915 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1916 struct snd_ctl_elem_info *uinfo)
1918 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1920 uinfo->value.integer.min = 0;
1921 uinfo->value.integer.max = 1;
1925 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1928 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1930 * @kcontrol: mixer control
1933 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1934 struct snd_ctl_elem_value *ucontrol)
1936 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1937 const char *pin = (const char *)kcontrol->private_value;
1939 mutex_lock(&codec->mutex);
1941 ucontrol->value.integer.value[0] =
1942 snd_soc_dapm_get_pin_status(codec, pin);
1944 mutex_unlock(&codec->mutex);
1948 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1951 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1953 * @kcontrol: mixer control
1956 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
1957 struct snd_ctl_elem_value *ucontrol)
1959 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1960 const char *pin = (const char *)kcontrol->private_value;
1962 mutex_lock(&codec->mutex);
1964 if (ucontrol->value.integer.value[0])
1965 snd_soc_dapm_enable_pin(codec, pin);
1967 snd_soc_dapm_disable_pin(codec, pin);
1969 snd_soc_dapm_sync(codec);
1971 mutex_unlock(&codec->mutex);
1975 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
1978 * snd_soc_dapm_new_control - create new dapm control
1979 * @codec: audio codec
1980 * @widget: widget template
1982 * Creates a new dapm control based upon the template.
1984 * Returns 0 for success else error.
1986 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1987 const struct snd_soc_dapm_widget *widget)
1989 struct snd_soc_dapm_widget *w;
1991 if ((w = dapm_cnew_widget(widget)) == NULL)
1995 INIT_LIST_HEAD(&w->sources);
1996 INIT_LIST_HEAD(&w->sinks);
1997 INIT_LIST_HEAD(&w->list);
1998 list_add(&w->list, &codec->dapm_widgets);
2000 /* machine layer set ups unconnected pins and insertions */
2004 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2007 * snd_soc_dapm_new_controls - create new dapm controls
2008 * @codec: audio codec
2009 * @widget: widget array
2010 * @num: number of widgets
2012 * Creates new DAPM controls based upon the templates.
2014 * Returns 0 for success else error.
2016 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
2017 const struct snd_soc_dapm_widget *widget,
2022 for (i = 0; i < num; i++) {
2023 ret = snd_soc_dapm_new_control(codec, widget);
2026 "ASoC: Failed to create DAPM control %s: %d\n",
2034 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2038 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2039 * @codec: audio codec
2040 * @stream: stream name
2041 * @event: stream event
2043 * Sends a stream event to the dapm core. The core then makes any
2044 * necessary widget power changes.
2046 * Returns 0 for success else error.
2048 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
2049 char *stream, int event)
2051 struct snd_soc_dapm_widget *w;
2056 mutex_lock(&codec->mutex);
2057 list_for_each_entry(w, &codec->dapm_widgets, list)
2061 pr_debug("widget %s\n %s stream %s event %d\n",
2062 w->name, w->sname, stream, event);
2063 if (strstr(w->sname, stream)) {
2065 case SND_SOC_DAPM_STREAM_START:
2068 case SND_SOC_DAPM_STREAM_STOP:
2071 case SND_SOC_DAPM_STREAM_SUSPEND:
2076 case SND_SOC_DAPM_STREAM_RESUME:
2082 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2084 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2090 dapm_power_widgets(codec, event);
2091 mutex_unlock(&codec->mutex);
2092 dump_dapm(codec, __func__);
2095 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2098 * snd_soc_dapm_enable_pin - enable pin.
2102 * Enables input/output pin and its parents or children widgets iff there is
2103 * a valid audio route and active audio stream.
2104 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2105 * do any widget power switching.
2107 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
2109 return snd_soc_dapm_set_pin(codec, pin, 1);
2111 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2114 * snd_soc_dapm_disable_pin - disable pin.
2118 * Disables input/output pin and its parents or children widgets.
2119 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2120 * do any widget power switching.
2122 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
2124 return snd_soc_dapm_set_pin(codec, pin, 0);
2126 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2129 * snd_soc_dapm_nc_pin - permanently disable pin.
2133 * Marks the specified pin as being not connected, disabling it along
2134 * any parent or child widgets. At present this is identical to
2135 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2136 * additional things such as disabling controls which only affect
2137 * paths through the pin.
2139 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2140 * do any widget power switching.
2142 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
2144 return snd_soc_dapm_set_pin(codec, pin, 0);
2146 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2149 * snd_soc_dapm_get_pin_status - get audio pin status
2150 * @codec: audio codec
2151 * @pin: audio signal pin endpoint (or start point)
2153 * Get audio pin status - connected or disconnected.
2155 * Returns 1 for connected otherwise 0.
2157 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
2159 struct snd_soc_dapm_widget *w;
2161 list_for_each_entry(w, &codec->dapm_widgets, list) {
2162 if (!strcmp(w->name, pin))
2163 return w->connected;
2168 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2171 * snd_soc_dapm_free - free dapm resources
2172 * @socdev: SoC device
2174 * Free all dapm widgets and resources.
2176 void snd_soc_dapm_free(struct snd_soc_device *socdev)
2178 struct snd_soc_codec *codec = socdev->card->codec;
2180 snd_soc_dapm_sys_remove(socdev->dev);
2181 dapm_free_widgets(codec);
2183 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2186 * snd_soc_dapm_shutdown - callback for system shutdown
2188 void snd_soc_dapm_shutdown(struct snd_soc_device *socdev)
2190 struct snd_soc_codec *codec = socdev->card->codec;
2191 struct snd_soc_dapm_widget *w;
2192 LIST_HEAD(down_list);
2195 list_for_each_entry(w, &codec->dapm_widgets, list) {
2197 dapm_seq_insert(w, &down_list, dapm_down_seq);
2203 /* If there were no widgets to power down we're already in
2207 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE);
2208 dapm_seq_run(codec, &down_list, 0, dapm_down_seq);
2209 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY);
2212 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF);
2215 /* Module information */
2216 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2217 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2218 MODULE_LICENSE("GPL");