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)
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 || widget->id == snd_soc_dapm_line)
580 list_for_each_entry(path, &widget->sources, list_sink) {
584 if (path->source && path->connect) {
586 con += is_connected_input_ep(path->source);
594 * Handler for generic register modifier widget.
596 int dapm_reg_event(struct snd_soc_dapm_widget *w,
597 struct snd_kcontrol *kcontrol, int event)
601 if (SND_SOC_DAPM_EVENT_ON(event))
606 snd_soc_update_bits(w->codec, -(w->reg + 1),
607 w->mask << w->shift, val << w->shift);
611 EXPORT_SYMBOL_GPL(dapm_reg_event);
613 /* Standard power change method, used to apply power changes to most
616 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
620 /* call any power change event handlers */
622 pr_debug("power %s event for %s flags %x\n",
623 w->power ? "on" : "off",
624 w->name, w->event_flags);
626 /* power up pre event */
627 if (w->power && w->event &&
628 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
629 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
634 /* power down pre event */
635 if (!w->power && w->event &&
636 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
637 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
642 /* Lower PGA volume to reduce pops */
643 if (w->id == snd_soc_dapm_pga && !w->power)
644 dapm_set_pga(w, w->power);
648 /* Raise PGA volume to reduce pops */
649 if (w->id == snd_soc_dapm_pga && w->power)
650 dapm_set_pga(w, w->power);
652 /* power up post event */
653 if (w->power && w->event &&
654 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
656 NULL, SND_SOC_DAPM_POST_PMU);
661 /* power down post event */
662 if (!w->power && w->event &&
663 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
664 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
672 /* Generic check to see if a widget should be powered.
674 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
678 in = is_connected_input_ep(w);
679 dapm_clear_walk(w->codec);
680 out = is_connected_output_ep(w);
681 dapm_clear_walk(w->codec);
682 return out != 0 && in != 0;
685 /* Check to see if an ADC has power */
686 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
691 in = is_connected_input_ep(w);
692 dapm_clear_walk(w->codec);
695 return dapm_generic_check_power(w);
699 /* Check to see if a DAC has power */
700 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
705 out = is_connected_output_ep(w);
706 dapm_clear_walk(w->codec);
709 return dapm_generic_check_power(w);
713 /* Check to see if a power supply is needed */
714 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
716 struct snd_soc_dapm_path *path;
719 /* Check if one of our outputs is connected */
720 list_for_each_entry(path, &w->sinks, list_source) {
721 if (path->connected &&
722 !path->connected(path->source, path->sink))
725 if (path->sink && path->sink->power_check &&
726 path->sink->power_check(path->sink)) {
732 dapm_clear_walk(w->codec);
737 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
738 struct snd_soc_dapm_widget *b,
741 if (sort[a->id] != sort[b->id])
742 return sort[a->id] - sort[b->id];
743 if (a->reg != b->reg)
744 return a->reg - b->reg;
749 /* Insert a widget in order into a DAPM power sequence. */
750 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
751 struct list_head *list,
754 struct snd_soc_dapm_widget *w;
756 list_for_each_entry(w, list, power_list)
757 if (dapm_seq_compare(new_widget, w, sort) < 0) {
758 list_add_tail(&new_widget->power_list, &w->power_list);
762 list_add_tail(&new_widget->power_list, list);
765 /* Apply the coalesced changes from a DAPM sequence */
766 static void dapm_seq_run_coalesced(struct snd_soc_codec *codec,
767 struct list_head *pending)
769 struct snd_soc_dapm_widget *w;
771 unsigned int value = 0;
772 unsigned int mask = 0;
773 unsigned int cur_mask;
775 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
778 list_for_each_entry(w, pending, power_list) {
779 cur_mask = 1 << w->shift;
780 BUG_ON(reg != w->reg);
791 pop_dbg(codec->pop_time,
792 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
793 w->name, reg, value, mask);
795 /* power up pre event */
796 if (w->power && w->event &&
797 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
798 pop_dbg(codec->pop_time, "pop test : %s PRE_PMU\n",
800 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
802 pr_err("%s: pre event failed: %d\n",
806 /* power down pre event */
807 if (!w->power && w->event &&
808 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
809 pop_dbg(codec->pop_time, "pop test : %s PRE_PMD\n",
811 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
813 pr_err("%s: pre event failed: %d\n",
817 /* Lower PGA volume to reduce pops */
818 if (w->id == snd_soc_dapm_pga && !w->power)
819 dapm_set_pga(w, w->power);
823 pop_dbg(codec->pop_time,
824 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
825 value, mask, reg, codec->pop_time);
826 pop_wait(codec->pop_time);
827 snd_soc_update_bits(codec, reg, mask, value);
830 list_for_each_entry(w, pending, power_list) {
831 /* Raise PGA volume to reduce pops */
832 if (w->id == snd_soc_dapm_pga && w->power)
833 dapm_set_pga(w, w->power);
835 /* power up post event */
836 if (w->power && w->event &&
837 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
838 pop_dbg(codec->pop_time, "pop test : %s POST_PMU\n",
841 NULL, SND_SOC_DAPM_POST_PMU);
843 pr_err("%s: post event failed: %d\n",
847 /* power down post event */
848 if (!w->power && w->event &&
849 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
850 pop_dbg(codec->pop_time, "pop test : %s POST_PMD\n",
852 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
854 pr_err("%s: post event failed: %d\n",
860 /* Apply a DAPM power sequence.
862 * We walk over a pre-sorted list of widgets to apply power to. In
863 * order to minimise the number of writes to the device required
864 * multiple widgets will be updated in a single write where possible.
865 * Currently anything that requires more than a single write is not
868 static void dapm_seq_run(struct snd_soc_codec *codec, struct list_head *list,
869 int event, int sort[])
871 struct snd_soc_dapm_widget *w, *n;
874 int cur_reg = SND_SOC_NOPM;
877 list_for_each_entry_safe(w, n, list, power_list) {
880 /* Do we need to apply any queued changes? */
881 if (sort[w->id] != cur_sort || w->reg != cur_reg) {
882 if (!list_empty(&pending))
883 dapm_seq_run_coalesced(codec, &pending);
885 INIT_LIST_HEAD(&pending);
887 cur_reg = SND_SOC_NOPM;
891 case snd_soc_dapm_pre:
893 list_for_each_entry_safe_continue(w, n, list,
896 if (event == SND_SOC_DAPM_STREAM_START)
898 NULL, SND_SOC_DAPM_PRE_PMU);
899 else if (event == SND_SOC_DAPM_STREAM_STOP)
901 NULL, SND_SOC_DAPM_PRE_PMD);
904 case snd_soc_dapm_post:
906 list_for_each_entry_safe_continue(w, n, list,
909 if (event == SND_SOC_DAPM_STREAM_START)
911 NULL, SND_SOC_DAPM_POST_PMU);
912 else if (event == SND_SOC_DAPM_STREAM_STOP)
914 NULL, SND_SOC_DAPM_POST_PMD);
917 case snd_soc_dapm_input:
918 case snd_soc_dapm_output:
919 case snd_soc_dapm_hp:
920 case snd_soc_dapm_mic:
921 case snd_soc_dapm_line:
922 case snd_soc_dapm_spk:
923 /* No register support currently */
924 ret = dapm_generic_apply_power(w);
928 /* Queue it up for application */
929 cur_sort = sort[w->id];
931 list_move(&w->power_list, &pending);
936 pr_err("Failed to apply widget power: %d\n",
940 if (!list_empty(&pending))
941 dapm_seq_run_coalesced(codec, &pending);
945 * Scan each dapm widget for complete audio path.
946 * A complete path is a route that has valid endpoints i.e.:-
948 * o DAC to output pin.
949 * o Input Pin to ADC.
950 * o Input pin to Output pin (bypass, sidetone)
951 * o DAC to ADC (loopback).
953 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
955 struct snd_soc_device *socdev = codec->socdev;
956 struct snd_soc_dapm_widget *w;
958 LIST_HEAD(down_list);
963 /* Check which widgets we need to power and store them in
964 * lists indicating if they should be powered up or down.
966 list_for_each_entry(w, &codec->dapm_widgets, list) {
968 case snd_soc_dapm_pre:
969 dapm_seq_insert(w, &down_list, dapm_down_seq);
971 case snd_soc_dapm_post:
972 dapm_seq_insert(w, &up_list, dapm_up_seq);
979 power = w->power_check(w);
983 if (w->power == power)
987 dapm_seq_insert(w, &up_list, dapm_up_seq);
989 dapm_seq_insert(w, &down_list, dapm_down_seq);
996 /* If there are no DAPM widgets then try to figure out power from the
999 if (list_empty(&codec->dapm_widgets)) {
1001 case SND_SOC_DAPM_STREAM_START:
1002 case SND_SOC_DAPM_STREAM_RESUME:
1005 case SND_SOC_DAPM_STREAM_NOP:
1006 sys_power = codec->bias_level != SND_SOC_BIAS_STANDBY;
1012 /* If we're changing to all on or all off then prepare */
1013 if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
1014 (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {
1015 ret = snd_soc_dapm_set_bias_level(socdev,
1016 SND_SOC_BIAS_PREPARE);
1018 pr_err("Failed to prepare bias: %d\n", ret);
1021 /* Power down widgets first; try to avoid amplifying pops. */
1022 dapm_seq_run(codec, &down_list, event, dapm_down_seq);
1025 dapm_seq_run(codec, &up_list, event, dapm_up_seq);
1027 /* If we just powered the last thing off drop to standby bias */
1028 if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
1029 ret = snd_soc_dapm_set_bias_level(socdev,
1030 SND_SOC_BIAS_STANDBY);
1032 pr_err("Failed to apply standby bias: %d\n", ret);
1035 /* If we just powered up then move to active bias */
1036 if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
1037 ret = snd_soc_dapm_set_bias_level(socdev,
1040 pr_err("Failed to apply active bias: %d\n", ret);
1043 pop_dbg(codec->pop_time, "DAPM sequencing finished, waiting %dms\n",
1050 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
1052 struct snd_soc_dapm_widget *w;
1053 struct snd_soc_dapm_path *p = NULL;
1056 printk("DAPM %s %s\n", codec->name, action);
1058 list_for_each_entry(w, &codec->dapm_widgets, list) {
1060 /* only display widgets that effect routing */
1062 case snd_soc_dapm_pre:
1063 case snd_soc_dapm_post:
1064 case snd_soc_dapm_vmid:
1066 case snd_soc_dapm_mux:
1067 case snd_soc_dapm_value_mux:
1068 case snd_soc_dapm_output:
1069 case snd_soc_dapm_input:
1070 case snd_soc_dapm_switch:
1071 case snd_soc_dapm_hp:
1072 case snd_soc_dapm_mic:
1073 case snd_soc_dapm_spk:
1074 case snd_soc_dapm_line:
1075 case snd_soc_dapm_micbias:
1076 case snd_soc_dapm_dac:
1077 case snd_soc_dapm_adc:
1078 case snd_soc_dapm_pga:
1079 case snd_soc_dapm_mixer:
1080 case snd_soc_dapm_mixer_named_ctl:
1081 case snd_soc_dapm_supply:
1082 case snd_soc_dapm_aif_in:
1083 case snd_soc_dapm_aif_out:
1085 in = is_connected_input_ep(w);
1086 dapm_clear_walk(w->codec);
1087 out = is_connected_output_ep(w);
1088 dapm_clear_walk(w->codec);
1089 printk("%s: %s in %d out %d\n", w->name,
1090 w->power ? "On":"Off",in, out);
1092 list_for_each_entry(p, &w->sources, list_sink) {
1094 printk(" in %s %s\n", p->name ? p->name : "static",
1097 list_for_each_entry(p, &w->sinks, list_source) {
1099 printk(" out %s %s\n", p->name ? p->name : "static",
1109 #ifdef CONFIG_DEBUG_FS
1110 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1112 file->private_data = inode->i_private;
1116 static ssize_t dapm_widget_power_read_file(struct file *file,
1117 char __user *user_buf,
1118 size_t count, loff_t *ppos)
1120 struct snd_soc_dapm_widget *w = file->private_data;
1124 struct snd_soc_dapm_path *p = NULL;
1126 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1130 in = is_connected_input_ep(w);
1131 dapm_clear_walk(w->codec);
1132 out = is_connected_output_ep(w);
1133 dapm_clear_walk(w->codec);
1135 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d\n",
1136 w->name, w->power ? "On" : "Off", in, out);
1138 if (w->active && w->sname)
1139 ret += snprintf(buf, PAGE_SIZE - ret, " stream %s active\n",
1142 list_for_each_entry(p, &w->sources, list_sink) {
1143 if (p->connected && !p->connected(w, p->sink))
1147 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1149 p->name ? p->name : "static",
1152 list_for_each_entry(p, &w->sinks, list_source) {
1153 if (p->connected && !p->connected(w, p->sink))
1157 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1159 p->name ? p->name : "static",
1163 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1169 static const struct file_operations dapm_widget_power_fops = {
1170 .open = dapm_widget_power_open_file,
1171 .read = dapm_widget_power_read_file,
1174 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1176 struct snd_soc_dapm_widget *w;
1179 if (!codec->debugfs_dapm)
1182 list_for_each_entry(w, &codec->dapm_widgets, list) {
1186 d = debugfs_create_file(w->name, 0444,
1187 codec->debugfs_dapm, w,
1188 &dapm_widget_power_fops);
1191 "ASoC: Failed to create %s debugfs file\n",
1196 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1201 /* test and update the power status of a mux widget */
1202 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1203 struct snd_kcontrol *kcontrol, int mask,
1204 int mux, int val, struct soc_enum *e)
1206 struct snd_soc_dapm_path *path;
1209 if (widget->id != snd_soc_dapm_mux &&
1210 widget->id != snd_soc_dapm_value_mux)
1213 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
1216 /* find dapm widget path assoc with kcontrol */
1217 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1218 if (path->kcontrol != kcontrol)
1221 if (!path->name || !e->texts[mux])
1225 /* we now need to match the string in the enum to the path */
1226 if (!(strcmp(path->name, e->texts[mux])))
1227 path->connect = 1; /* new connection */
1229 path->connect = 0; /* old connection must be powered down */
1233 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1234 dump_dapm(widget->codec, "mux power update");
1240 /* test and update the power status of a mixer or switch widget */
1241 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1242 struct snd_kcontrol *kcontrol, int reg,
1243 int val_mask, int val, int invert)
1245 struct snd_soc_dapm_path *path;
1248 if (widget->id != snd_soc_dapm_mixer &&
1249 widget->id != snd_soc_dapm_mixer_named_ctl &&
1250 widget->id != snd_soc_dapm_switch)
1253 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
1256 /* find dapm widget path assoc with kcontrol */
1257 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1258 if (path->kcontrol != kcontrol)
1261 /* found, now check type */
1264 /* new connection */
1265 path->connect = invert ? 0:1;
1267 /* old connection must be powered down */
1268 path->connect = invert ? 1:0;
1273 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1274 dump_dapm(widget->codec, "mixer power update");
1280 /* show dapm widget status in sys fs */
1281 static ssize_t dapm_widget_show(struct device *dev,
1282 struct device_attribute *attr, char *buf)
1284 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1285 struct snd_soc_codec *codec = devdata->card->codec;
1286 struct snd_soc_dapm_widget *w;
1288 char *state = "not set";
1290 list_for_each_entry(w, &codec->dapm_widgets, list) {
1292 /* only display widgets that burnm power */
1294 case snd_soc_dapm_hp:
1295 case snd_soc_dapm_mic:
1296 case snd_soc_dapm_spk:
1297 case snd_soc_dapm_line:
1298 case snd_soc_dapm_micbias:
1299 case snd_soc_dapm_dac:
1300 case snd_soc_dapm_adc:
1301 case snd_soc_dapm_pga:
1302 case snd_soc_dapm_mixer:
1303 case snd_soc_dapm_mixer_named_ctl:
1304 case snd_soc_dapm_supply:
1306 count += sprintf(buf + count, "%s: %s\n",
1307 w->name, w->power ? "On":"Off");
1314 switch (codec->bias_level) {
1315 case SND_SOC_BIAS_ON:
1318 case SND_SOC_BIAS_PREPARE:
1321 case SND_SOC_BIAS_STANDBY:
1324 case SND_SOC_BIAS_OFF:
1328 count += sprintf(buf + count, "PM State: %s\n", state);
1333 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1335 int snd_soc_dapm_sys_add(struct device *dev)
1337 return device_create_file(dev, &dev_attr_dapm_widget);
1340 static void snd_soc_dapm_sys_remove(struct device *dev)
1342 device_remove_file(dev, &dev_attr_dapm_widget);
1345 /* free all dapm widgets and resources */
1346 static void dapm_free_widgets(struct snd_soc_codec *codec)
1348 struct snd_soc_dapm_widget *w, *next_w;
1349 struct snd_soc_dapm_path *p, *next_p;
1351 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
1356 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
1358 kfree(p->long_name);
1363 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
1364 const char *pin, int status)
1366 struct snd_soc_dapm_widget *w;
1368 list_for_each_entry(w, &codec->dapm_widgets, list) {
1369 if (!strcmp(w->name, pin)) {
1370 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
1371 w->connected = status;
1376 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
1381 * snd_soc_dapm_sync - scan and power dapm paths
1382 * @codec: audio codec
1384 * Walks all dapm audio paths and powers widgets according to their
1385 * stream or path usage.
1387 * Returns 0 for success.
1389 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
1391 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1392 dump_dapm(codec, "sync");
1395 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1397 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
1398 const struct snd_soc_dapm_route *route)
1400 struct snd_soc_dapm_path *path;
1401 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1402 const char *sink = route->sink;
1403 const char *control = route->control;
1404 const char *source = route->source;
1407 /* find src and dest widgets */
1408 list_for_each_entry(w, &codec->dapm_widgets, list) {
1410 if (!wsink && !(strcmp(w->name, sink))) {
1414 if (!wsource && !(strcmp(w->name, source))) {
1419 if (wsource == NULL || wsink == NULL)
1422 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1426 path->source = wsource;
1428 path->connected = route->connected;
1429 INIT_LIST_HEAD(&path->list);
1430 INIT_LIST_HEAD(&path->list_source);
1431 INIT_LIST_HEAD(&path->list_sink);
1433 /* check for external widgets */
1434 if (wsink->id == snd_soc_dapm_input) {
1435 if (wsource->id == snd_soc_dapm_micbias ||
1436 wsource->id == snd_soc_dapm_mic ||
1437 wsource->id == snd_soc_dapm_line ||
1438 wsource->id == snd_soc_dapm_output)
1441 if (wsource->id == snd_soc_dapm_output) {
1442 if (wsink->id == snd_soc_dapm_spk ||
1443 wsink->id == snd_soc_dapm_hp ||
1444 wsink->id == snd_soc_dapm_line ||
1445 wsink->id == snd_soc_dapm_input)
1449 /* connect static paths */
1450 if (control == NULL) {
1451 list_add(&path->list, &codec->dapm_paths);
1452 list_add(&path->list_sink, &wsink->sources);
1453 list_add(&path->list_source, &wsource->sinks);
1458 /* connect dynamic paths */
1460 case snd_soc_dapm_adc:
1461 case snd_soc_dapm_dac:
1462 case snd_soc_dapm_pga:
1463 case snd_soc_dapm_input:
1464 case snd_soc_dapm_output:
1465 case snd_soc_dapm_micbias:
1466 case snd_soc_dapm_vmid:
1467 case snd_soc_dapm_pre:
1468 case snd_soc_dapm_post:
1469 case snd_soc_dapm_supply:
1470 case snd_soc_dapm_aif_in:
1471 case snd_soc_dapm_aif_out:
1472 list_add(&path->list, &codec->dapm_paths);
1473 list_add(&path->list_sink, &wsink->sources);
1474 list_add(&path->list_source, &wsource->sinks);
1477 case snd_soc_dapm_mux:
1478 case snd_soc_dapm_value_mux:
1479 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1480 &wsink->kcontrols[0]);
1484 case snd_soc_dapm_switch:
1485 case snd_soc_dapm_mixer:
1486 case snd_soc_dapm_mixer_named_ctl:
1487 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1491 case snd_soc_dapm_hp:
1492 case snd_soc_dapm_mic:
1493 case snd_soc_dapm_line:
1494 case snd_soc_dapm_spk:
1495 list_add(&path->list, &codec->dapm_paths);
1496 list_add(&path->list_sink, &wsink->sources);
1497 list_add(&path->list_source, &wsource->sinks);
1504 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1511 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1513 * @route: audio routes
1514 * @num: number of routes
1516 * Connects 2 dapm widgets together via a named audio path. The sink is
1517 * the widget receiving the audio signal, whilst the source is the sender
1518 * of the audio signal.
1520 * Returns 0 for success else error. On error all resources can be freed
1521 * with a call to snd_soc_card_free().
1523 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1524 const struct snd_soc_dapm_route *route, int num)
1528 for (i = 0; i < num; i++) {
1529 ret = snd_soc_dapm_add_route(codec, route);
1531 printk(KERN_ERR "Failed to add route %s->%s\n",
1541 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1544 * snd_soc_dapm_new_widgets - add new dapm widgets
1545 * @codec: audio codec
1547 * Checks the codec for any new dapm widgets and creates them if found.
1549 * Returns 0 for success.
1551 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1553 struct snd_soc_dapm_widget *w;
1555 list_for_each_entry(w, &codec->dapm_widgets, list)
1561 case snd_soc_dapm_switch:
1562 case snd_soc_dapm_mixer:
1563 case snd_soc_dapm_mixer_named_ctl:
1564 w->power_check = dapm_generic_check_power;
1565 dapm_new_mixer(codec, w);
1567 case snd_soc_dapm_mux:
1568 case snd_soc_dapm_value_mux:
1569 w->power_check = dapm_generic_check_power;
1570 dapm_new_mux(codec, w);
1572 case snd_soc_dapm_adc:
1573 case snd_soc_dapm_aif_out:
1574 w->power_check = dapm_adc_check_power;
1576 case snd_soc_dapm_dac:
1577 case snd_soc_dapm_aif_in:
1578 w->power_check = dapm_dac_check_power;
1580 case snd_soc_dapm_pga:
1581 w->power_check = dapm_generic_check_power;
1582 dapm_new_pga(codec, w);
1584 case snd_soc_dapm_input:
1585 case snd_soc_dapm_output:
1586 case snd_soc_dapm_micbias:
1587 case snd_soc_dapm_spk:
1588 case snd_soc_dapm_hp:
1589 case snd_soc_dapm_mic:
1590 case snd_soc_dapm_line:
1591 w->power_check = dapm_generic_check_power;
1593 case snd_soc_dapm_supply:
1594 w->power_check = dapm_supply_check_power;
1595 case snd_soc_dapm_vmid:
1596 case snd_soc_dapm_pre:
1597 case snd_soc_dapm_post:
1603 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1606 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1609 * snd_soc_dapm_get_volsw - dapm mixer get callback
1610 * @kcontrol: mixer control
1611 * @ucontrol: control element information
1613 * Callback to get the value of a dapm mixer control.
1615 * Returns 0 for success.
1617 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1618 struct snd_ctl_elem_value *ucontrol)
1620 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1621 struct soc_mixer_control *mc =
1622 (struct soc_mixer_control *)kcontrol->private_value;
1623 unsigned int reg = mc->reg;
1624 unsigned int shift = mc->shift;
1625 unsigned int rshift = mc->rshift;
1627 unsigned int invert = mc->invert;
1628 unsigned int mask = (1 << fls(max)) - 1;
1630 /* return the saved value if we are powered down */
1631 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1632 ucontrol->value.integer.value[0] = widget->saved_value;
1636 ucontrol->value.integer.value[0] =
1637 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1638 if (shift != rshift)
1639 ucontrol->value.integer.value[1] =
1640 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1642 ucontrol->value.integer.value[0] =
1643 max - ucontrol->value.integer.value[0];
1644 if (shift != rshift)
1645 ucontrol->value.integer.value[1] =
1646 max - ucontrol->value.integer.value[1];
1651 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1654 * snd_soc_dapm_put_volsw - dapm mixer set callback
1655 * @kcontrol: mixer control
1656 * @ucontrol: control element information
1658 * Callback to set the value of a dapm mixer control.
1660 * Returns 0 for success.
1662 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1663 struct snd_ctl_elem_value *ucontrol)
1665 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1666 struct soc_mixer_control *mc =
1667 (struct soc_mixer_control *)kcontrol->private_value;
1668 unsigned int reg = mc->reg;
1669 unsigned int shift = mc->shift;
1670 unsigned int rshift = mc->rshift;
1672 unsigned int mask = (1 << fls(max)) - 1;
1673 unsigned int invert = mc->invert;
1674 unsigned int val, val2, val_mask;
1677 val = (ucontrol->value.integer.value[0] & mask);
1681 val_mask = mask << shift;
1683 if (shift != rshift) {
1684 val2 = (ucontrol->value.integer.value[1] & mask);
1687 val_mask |= mask << rshift;
1688 val |= val2 << rshift;
1691 mutex_lock(&widget->codec->mutex);
1692 widget->value = val;
1694 /* save volume value if the widget is powered down */
1695 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1696 widget->saved_value = val;
1697 mutex_unlock(&widget->codec->mutex);
1701 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1702 if (widget->event) {
1703 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1704 ret = widget->event(widget, kcontrol,
1705 SND_SOC_DAPM_PRE_REG);
1711 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1712 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1713 ret = widget->event(widget, kcontrol,
1714 SND_SOC_DAPM_POST_REG);
1716 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1719 mutex_unlock(&widget->codec->mutex);
1722 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1725 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1726 * @kcontrol: mixer control
1727 * @ucontrol: control element information
1729 * Callback to get the value of a dapm enumerated double mixer control.
1731 * Returns 0 for success.
1733 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1734 struct snd_ctl_elem_value *ucontrol)
1736 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1737 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1738 unsigned int val, bitmask;
1740 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1742 val = snd_soc_read(widget->codec, e->reg);
1743 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1744 if (e->shift_l != e->shift_r)
1745 ucontrol->value.enumerated.item[1] =
1746 (val >> e->shift_r) & (bitmask - 1);
1750 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1753 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1754 * @kcontrol: mixer control
1755 * @ucontrol: control element information
1757 * Callback to set the value of a dapm enumerated double mixer control.
1759 * Returns 0 for success.
1761 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1762 struct snd_ctl_elem_value *ucontrol)
1764 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1765 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1766 unsigned int val, mux;
1767 unsigned int mask, bitmask;
1770 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1772 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1774 mux = ucontrol->value.enumerated.item[0];
1775 val = mux << e->shift_l;
1776 mask = (bitmask - 1) << e->shift_l;
1777 if (e->shift_l != e->shift_r) {
1778 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1780 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1781 mask |= (bitmask - 1) << e->shift_r;
1784 mutex_lock(&widget->codec->mutex);
1785 widget->value = val;
1786 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1787 if (widget->event) {
1788 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1789 ret = widget->event(widget,
1790 kcontrol, SND_SOC_DAPM_PRE_REG);
1794 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1795 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1796 ret = widget->event(widget,
1797 kcontrol, SND_SOC_DAPM_POST_REG);
1799 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1802 mutex_unlock(&widget->codec->mutex);
1805 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1808 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1810 * @kcontrol: mixer control
1811 * @ucontrol: control element information
1813 * Callback to get the value of a dapm semi enumerated double mixer control.
1815 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1816 * used for handling bitfield coded enumeration for example.
1818 * Returns 0 for success.
1820 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1821 struct snd_ctl_elem_value *ucontrol)
1823 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1824 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1825 unsigned int reg_val, val, mux;
1827 reg_val = snd_soc_read(widget->codec, e->reg);
1828 val = (reg_val >> e->shift_l) & e->mask;
1829 for (mux = 0; mux < e->max; mux++) {
1830 if (val == e->values[mux])
1833 ucontrol->value.enumerated.item[0] = mux;
1834 if (e->shift_l != e->shift_r) {
1835 val = (reg_val >> e->shift_r) & e->mask;
1836 for (mux = 0; mux < e->max; mux++) {
1837 if (val == e->values[mux])
1840 ucontrol->value.enumerated.item[1] = mux;
1845 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1848 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1850 * @kcontrol: mixer control
1851 * @ucontrol: control element information
1853 * Callback to set the value of a dapm semi enumerated double mixer control.
1855 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1856 * used for handling bitfield coded enumeration for example.
1858 * Returns 0 for success.
1860 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1861 struct snd_ctl_elem_value *ucontrol)
1863 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1864 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1865 unsigned int val, mux;
1869 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1871 mux = ucontrol->value.enumerated.item[0];
1872 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1873 mask = e->mask << e->shift_l;
1874 if (e->shift_l != e->shift_r) {
1875 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1877 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1878 mask |= e->mask << e->shift_r;
1881 mutex_lock(&widget->codec->mutex);
1882 widget->value = val;
1883 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1884 if (widget->event) {
1885 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1886 ret = widget->event(widget,
1887 kcontrol, SND_SOC_DAPM_PRE_REG);
1891 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1892 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1893 ret = widget->event(widget,
1894 kcontrol, SND_SOC_DAPM_POST_REG);
1896 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1899 mutex_unlock(&widget->codec->mutex);
1902 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1905 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1907 * @kcontrol: mixer control
1908 * @uinfo: control element information
1910 * Callback to provide information about a pin switch control.
1912 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1913 struct snd_ctl_elem_info *uinfo)
1915 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1917 uinfo->value.integer.min = 0;
1918 uinfo->value.integer.max = 1;
1922 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1925 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1927 * @kcontrol: mixer control
1930 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1931 struct snd_ctl_elem_value *ucontrol)
1933 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1934 const char *pin = (const char *)kcontrol->private_value;
1936 mutex_lock(&codec->mutex);
1938 ucontrol->value.integer.value[0] =
1939 snd_soc_dapm_get_pin_status(codec, pin);
1941 mutex_unlock(&codec->mutex);
1945 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1948 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1950 * @kcontrol: mixer control
1953 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
1954 struct snd_ctl_elem_value *ucontrol)
1956 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1957 const char *pin = (const char *)kcontrol->private_value;
1959 mutex_lock(&codec->mutex);
1961 if (ucontrol->value.integer.value[0])
1962 snd_soc_dapm_enable_pin(codec, pin);
1964 snd_soc_dapm_disable_pin(codec, pin);
1966 snd_soc_dapm_sync(codec);
1968 mutex_unlock(&codec->mutex);
1972 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
1975 * snd_soc_dapm_new_control - create new dapm control
1976 * @codec: audio codec
1977 * @widget: widget template
1979 * Creates a new dapm control based upon the template.
1981 * Returns 0 for success else error.
1983 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1984 const struct snd_soc_dapm_widget *widget)
1986 struct snd_soc_dapm_widget *w;
1988 if ((w = dapm_cnew_widget(widget)) == NULL)
1992 INIT_LIST_HEAD(&w->sources);
1993 INIT_LIST_HEAD(&w->sinks);
1994 INIT_LIST_HEAD(&w->list);
1995 list_add(&w->list, &codec->dapm_widgets);
1997 /* machine layer set ups unconnected pins and insertions */
2001 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2004 * snd_soc_dapm_new_controls - create new dapm controls
2005 * @codec: audio codec
2006 * @widget: widget array
2007 * @num: number of widgets
2009 * Creates new DAPM controls based upon the templates.
2011 * Returns 0 for success else error.
2013 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
2014 const struct snd_soc_dapm_widget *widget,
2019 for (i = 0; i < num; i++) {
2020 ret = snd_soc_dapm_new_control(codec, widget);
2023 "ASoC: Failed to create DAPM control %s: %d\n",
2031 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2035 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2036 * @codec: audio codec
2037 * @stream: stream name
2038 * @event: stream event
2040 * Sends a stream event to the dapm core. The core then makes any
2041 * necessary widget power changes.
2043 * Returns 0 for success else error.
2045 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
2046 char *stream, int event)
2048 struct snd_soc_dapm_widget *w;
2053 mutex_lock(&codec->mutex);
2054 list_for_each_entry(w, &codec->dapm_widgets, list)
2058 pr_debug("widget %s\n %s stream %s event %d\n",
2059 w->name, w->sname, stream, event);
2060 if (strstr(w->sname, stream)) {
2062 case SND_SOC_DAPM_STREAM_START:
2065 case SND_SOC_DAPM_STREAM_STOP:
2068 case SND_SOC_DAPM_STREAM_SUSPEND:
2073 case SND_SOC_DAPM_STREAM_RESUME:
2079 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2081 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2086 mutex_unlock(&codec->mutex);
2088 dapm_power_widgets(codec, event);
2089 dump_dapm(codec, __func__);
2092 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2095 * snd_soc_dapm_enable_pin - enable pin.
2099 * Enables input/output pin and its parents or children widgets iff there is
2100 * a valid audio route and active audio stream.
2101 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2102 * do any widget power switching.
2104 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
2106 return snd_soc_dapm_set_pin(codec, pin, 1);
2108 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2111 * snd_soc_dapm_disable_pin - disable pin.
2115 * Disables input/output pin and its parents or children widgets.
2116 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2117 * do any widget power switching.
2119 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
2121 return snd_soc_dapm_set_pin(codec, pin, 0);
2123 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2126 * snd_soc_dapm_nc_pin - permanently disable pin.
2130 * Marks the specified pin as being not connected, disabling it along
2131 * any parent or child widgets. At present this is identical to
2132 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2133 * additional things such as disabling controls which only affect
2134 * paths through the pin.
2136 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2137 * do any widget power switching.
2139 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
2141 return snd_soc_dapm_set_pin(codec, pin, 0);
2143 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2146 * snd_soc_dapm_get_pin_status - get audio pin status
2147 * @codec: audio codec
2148 * @pin: audio signal pin endpoint (or start point)
2150 * Get audio pin status - connected or disconnected.
2152 * Returns 1 for connected otherwise 0.
2154 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
2156 struct snd_soc_dapm_widget *w;
2158 list_for_each_entry(w, &codec->dapm_widgets, list) {
2159 if (!strcmp(w->name, pin))
2160 return w->connected;
2165 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2168 * snd_soc_dapm_free - free dapm resources
2169 * @socdev: SoC device
2171 * Free all dapm widgets and resources.
2173 void snd_soc_dapm_free(struct snd_soc_device *socdev)
2175 struct snd_soc_codec *codec = socdev->card->codec;
2177 snd_soc_dapm_sys_remove(socdev->dev);
2178 dapm_free_widgets(codec);
2180 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2183 * snd_soc_dapm_shutdown - callback for system shutdown
2185 void snd_soc_dapm_shutdown(struct snd_soc_device *socdev)
2187 struct snd_soc_codec *codec = socdev->card->codec;
2188 struct snd_soc_dapm_widget *w;
2189 LIST_HEAD(down_list);
2192 list_for_each_entry(w, &codec->dapm_widgets, list) {
2194 dapm_seq_insert(w, &down_list, dapm_down_seq);
2200 /* If there were no widgets to power down we're already in
2204 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE);
2205 dapm_seq_run(codec, &down_list, 0, dapm_down_seq);
2206 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY);
2209 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF);
2212 /* Module information */
2213 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2214 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2215 MODULE_LICENSE("GPL");