2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc-dapm.h>
44 #include <sound/initval.h>
48 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
50 #define dump_dapm(codec, action)
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq[] = {
55 [snd_soc_dapm_pre] = 0,
56 [snd_soc_dapm_supply] = 1,
57 [snd_soc_dapm_micbias] = 2,
58 [snd_soc_dapm_mic] = 3,
59 [snd_soc_dapm_mux] = 4,
60 [snd_soc_dapm_value_mux] = 4,
61 [snd_soc_dapm_dac] = 5,
62 [snd_soc_dapm_mixer] = 6,
63 [snd_soc_dapm_mixer_named_ctl] = 6,
64 [snd_soc_dapm_pga] = 7,
65 [snd_soc_dapm_adc] = 8,
66 [snd_soc_dapm_hp] = 9,
67 [snd_soc_dapm_spk] = 10,
68 [snd_soc_dapm_post] = 11,
71 static int dapm_down_seq[] = {
72 [snd_soc_dapm_pre] = 0,
73 [snd_soc_dapm_adc] = 1,
74 [snd_soc_dapm_hp] = 2,
75 [snd_soc_dapm_spk] = 3,
76 [snd_soc_dapm_pga] = 4,
77 [snd_soc_dapm_mixer_named_ctl] = 5,
78 [snd_soc_dapm_mixer] = 5,
79 [snd_soc_dapm_dac] = 6,
80 [snd_soc_dapm_mic] = 7,
81 [snd_soc_dapm_micbias] = 8,
82 [snd_soc_dapm_mux] = 9,
83 [snd_soc_dapm_value_mux] = 9,
84 [snd_soc_dapm_supply] = 10,
85 [snd_soc_dapm_post] = 11,
88 static void pop_wait(u32 pop_time)
91 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
94 static void pop_dbg(u32 pop_time, const char *fmt, ...)
108 /* create a new dapm widget */
109 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
110 const struct snd_soc_dapm_widget *_widget)
112 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
116 * snd_soc_dapm_set_bias_level - set the bias level for the system
117 * @socdev: audio device
118 * @level: level to configure
120 * Configure the bias (power) levels for the SoC audio device.
122 * Returns 0 for success else error.
124 static int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
125 enum snd_soc_bias_level level)
127 struct snd_soc_card *card = socdev->card;
128 struct snd_soc_codec *codec = socdev->card->codec;
132 case SND_SOC_BIAS_ON:
133 dev_dbg(socdev->dev, "Setting full bias\n");
135 case SND_SOC_BIAS_PREPARE:
136 dev_dbg(socdev->dev, "Setting bias prepare\n");
138 case SND_SOC_BIAS_STANDBY:
139 dev_dbg(socdev->dev, "Setting standby bias\n");
141 case SND_SOC_BIAS_OFF:
142 dev_dbg(socdev->dev, "Setting bias off\n");
145 dev_err(socdev->dev, "Setting invalid bias %d\n", level);
149 if (card->set_bias_level)
150 ret = card->set_bias_level(card, level);
151 if (ret == 0 && codec->set_bias_level)
152 ret = codec->set_bias_level(codec, level);
157 /* set up initial codec paths */
158 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
159 struct snd_soc_dapm_path *p, int i)
162 case snd_soc_dapm_switch:
163 case snd_soc_dapm_mixer:
164 case snd_soc_dapm_mixer_named_ctl: {
166 struct soc_mixer_control *mc = (struct soc_mixer_control *)
167 w->kcontrols[i].private_value;
168 unsigned int reg = mc->reg;
169 unsigned int shift = mc->shift;
171 unsigned int mask = (1 << fls(max)) - 1;
172 unsigned int invert = mc->invert;
174 val = snd_soc_read(w->codec, reg);
175 val = (val >> shift) & mask;
177 if ((invert && !val) || (!invert && val))
183 case snd_soc_dapm_mux: {
184 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
185 int val, item, bitmask;
187 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
189 val = snd_soc_read(w->codec, e->reg);
190 item = (val >> e->shift_l) & (bitmask - 1);
193 for (i = 0; i < e->max; i++) {
194 if (!(strcmp(p->name, e->texts[i])) && item == i)
199 case snd_soc_dapm_value_mux: {
200 struct soc_enum *e = (struct soc_enum *)
201 w->kcontrols[i].private_value;
204 val = snd_soc_read(w->codec, e->reg);
205 val = (val >> e->shift_l) & e->mask;
206 for (item = 0; item < e->max; item++) {
207 if (val == e->values[item])
212 for (i = 0; i < e->max; i++) {
213 if (!(strcmp(p->name, e->texts[i])) && item == i)
218 /* does not effect routing - always connected */
219 case snd_soc_dapm_pga:
220 case snd_soc_dapm_output:
221 case snd_soc_dapm_adc:
222 case snd_soc_dapm_input:
223 case snd_soc_dapm_dac:
224 case snd_soc_dapm_micbias:
225 case snd_soc_dapm_vmid:
226 case snd_soc_dapm_supply:
229 /* does effect routing - dynamically connected */
230 case snd_soc_dapm_hp:
231 case snd_soc_dapm_mic:
232 case snd_soc_dapm_spk:
233 case snd_soc_dapm_line:
234 case snd_soc_dapm_pre:
235 case snd_soc_dapm_post:
241 /* connect mux widget to its interconnecting audio paths */
242 static int dapm_connect_mux(struct snd_soc_codec *codec,
243 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
244 struct snd_soc_dapm_path *path, const char *control_name,
245 const struct snd_kcontrol_new *kcontrol)
247 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
250 for (i = 0; i < e->max; i++) {
251 if (!(strcmp(control_name, e->texts[i]))) {
252 list_add(&path->list, &codec->dapm_paths);
253 list_add(&path->list_sink, &dest->sources);
254 list_add(&path->list_source, &src->sinks);
255 path->name = (char*)e->texts[i];
256 dapm_set_path_status(dest, path, 0);
264 /* connect mixer widget to its interconnecting audio paths */
265 static int dapm_connect_mixer(struct snd_soc_codec *codec,
266 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
267 struct snd_soc_dapm_path *path, const char *control_name)
271 /* search for mixer kcontrol */
272 for (i = 0; i < dest->num_kcontrols; i++) {
273 if (!strcmp(control_name, dest->kcontrols[i].name)) {
274 list_add(&path->list, &codec->dapm_paths);
275 list_add(&path->list_sink, &dest->sources);
276 list_add(&path->list_source, &src->sinks);
277 path->name = dest->kcontrols[i].name;
278 dapm_set_path_status(dest, path, i);
285 /* update dapm codec register bits */
286 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
289 unsigned int old, new;
290 struct snd_soc_codec *codec = widget->codec;
292 /* check for valid widgets */
293 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
294 widget->id == snd_soc_dapm_output ||
295 widget->id == snd_soc_dapm_hp ||
296 widget->id == snd_soc_dapm_mic ||
297 widget->id == snd_soc_dapm_line ||
298 widget->id == snd_soc_dapm_spk)
301 power = widget->power;
303 power = (power ? 0:1);
305 old = snd_soc_read(codec, widget->reg);
306 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
310 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
311 widget->name, widget->power ? "on" : "off",
313 snd_soc_write(codec, widget->reg, new);
314 pop_wait(codec->pop_time);
316 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
321 /* ramps the volume up or down to minimise pops before or after a
322 * DAPM power event */
323 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
325 const struct snd_kcontrol_new *k = widget->kcontrols;
327 if (widget->muted && !power)
329 if (!widget->muted && power)
332 if (widget->num_kcontrols && k) {
333 struct soc_mixer_control *mc =
334 (struct soc_mixer_control *)k->private_value;
335 unsigned int reg = mc->reg;
336 unsigned int shift = mc->shift;
338 unsigned int mask = (1 << fls(max)) - 1;
339 unsigned int invert = mc->invert;
343 /* power up has happended, increase volume to last level */
345 for (i = max; i > widget->saved_value; i--)
346 snd_soc_update_bits(widget->codec, reg, mask, i);
348 for (i = 0; i < widget->saved_value; i++)
349 snd_soc_update_bits(widget->codec, reg, mask, i);
353 /* power down is about to occur, decrease volume to mute */
354 int val = snd_soc_read(widget->codec, reg);
355 int i = widget->saved_value = (val >> shift) & mask;
357 for (; i < mask; i++)
358 snd_soc_update_bits(widget->codec, reg, mask, i);
361 snd_soc_update_bits(widget->codec, reg, mask, i);
369 /* create new dapm mixer control */
370 static int dapm_new_mixer(struct snd_soc_codec *codec,
371 struct snd_soc_dapm_widget *w)
375 struct snd_soc_dapm_path *path;
378 for (i = 0; i < w->num_kcontrols; i++) {
381 list_for_each_entry(path, &w->sources, list_sink) {
383 /* mixer/mux paths name must match control name */
384 if (path->name != (char*)w->kcontrols[i].name)
387 /* add dapm control with long name.
388 * for dapm_mixer this is the concatenation of the
389 * mixer and kcontrol name.
390 * for dapm_mixer_named_ctl this is simply the
393 name_len = strlen(w->kcontrols[i].name) + 1;
394 if (w->id != snd_soc_dapm_mixer_named_ctl)
395 name_len += 1 + strlen(w->name);
397 path->long_name = kmalloc(name_len, GFP_KERNEL);
399 if (path->long_name == NULL)
404 snprintf(path->long_name, name_len, "%s %s",
405 w->name, w->kcontrols[i].name);
407 case snd_soc_dapm_mixer_named_ctl:
408 snprintf(path->long_name, name_len, "%s",
409 w->kcontrols[i].name);
413 path->long_name[name_len - 1] = '\0';
415 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
417 ret = snd_ctl_add(codec->card, path->kcontrol);
419 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s: %d\n",
422 kfree(path->long_name);
423 path->long_name = NULL;
431 /* create new dapm mux control */
432 static int dapm_new_mux(struct snd_soc_codec *codec,
433 struct snd_soc_dapm_widget *w)
435 struct snd_soc_dapm_path *path = NULL;
436 struct snd_kcontrol *kcontrol;
439 if (!w->num_kcontrols) {
440 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
444 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
445 ret = snd_ctl_add(codec->card, kcontrol);
449 list_for_each_entry(path, &w->sources, list_sink)
450 path->kcontrol = kcontrol;
455 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
459 /* create new dapm volume control */
460 static int dapm_new_pga(struct snd_soc_codec *codec,
461 struct snd_soc_dapm_widget *w)
463 struct snd_kcontrol *kcontrol;
466 if (!w->num_kcontrols)
469 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
470 ret = snd_ctl_add(codec->card, kcontrol);
472 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
479 /* reset 'walked' bit for each dapm path */
480 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
482 struct snd_soc_dapm_path *p;
484 list_for_each_entry(p, &codec->dapm_paths, list)
489 * Recursively check for a completed path to an active or physically connected
490 * output widget. Returns number of complete paths.
492 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
494 struct snd_soc_dapm_path *path;
497 if (widget->id == snd_soc_dapm_supply)
500 if (widget->id == snd_soc_dapm_adc && widget->active)
503 if (widget->connected) {
504 /* connected pin ? */
505 if (widget->id == snd_soc_dapm_output && !widget->ext)
508 /* connected jack or spk ? */
509 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
510 widget->id == snd_soc_dapm_line)
514 list_for_each_entry(path, &widget->sinks, list_source) {
518 if (path->sink && path->connect) {
520 con += is_connected_output_ep(path->sink);
528 * Recursively check for a completed path to an active or physically connected
529 * input widget. Returns number of complete paths.
531 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
533 struct snd_soc_dapm_path *path;
536 if (widget->id == snd_soc_dapm_supply)
539 /* active stream ? */
540 if (widget->id == snd_soc_dapm_dac && widget->active)
543 if (widget->connected) {
544 /* connected pin ? */
545 if (widget->id == snd_soc_dapm_input && !widget->ext)
548 /* connected VMID/Bias for lower pops */
549 if (widget->id == snd_soc_dapm_vmid)
552 /* connected jack ? */
553 if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line)
557 list_for_each_entry(path, &widget->sources, list_sink) {
561 if (path->source && path->connect) {
563 con += is_connected_input_ep(path->source);
571 * Handler for generic register modifier widget.
573 int dapm_reg_event(struct snd_soc_dapm_widget *w,
574 struct snd_kcontrol *kcontrol, int event)
578 if (SND_SOC_DAPM_EVENT_ON(event))
583 snd_soc_update_bits(w->codec, -(w->reg + 1),
584 w->mask << w->shift, val << w->shift);
588 EXPORT_SYMBOL_GPL(dapm_reg_event);
590 /* Standard power change method, used to apply power changes to most
593 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
597 /* call any power change event handlers */
599 pr_debug("power %s event for %s flags %x\n",
600 w->power ? "on" : "off",
601 w->name, w->event_flags);
603 /* power up pre event */
604 if (w->power && w->event &&
605 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
606 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
611 /* power down pre event */
612 if (!w->power && w->event &&
613 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
614 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
619 /* Lower PGA volume to reduce pops */
620 if (w->id == snd_soc_dapm_pga && !w->power)
621 dapm_set_pga(w, w->power);
625 /* Raise PGA volume to reduce pops */
626 if (w->id == snd_soc_dapm_pga && w->power)
627 dapm_set_pga(w, w->power);
629 /* power up post event */
630 if (w->power && w->event &&
631 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
633 NULL, SND_SOC_DAPM_POST_PMU);
638 /* power down post event */
639 if (!w->power && w->event &&
640 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
641 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
649 /* Generic check to see if a widget should be powered.
651 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
655 in = is_connected_input_ep(w);
656 dapm_clear_walk(w->codec);
657 out = is_connected_output_ep(w);
658 dapm_clear_walk(w->codec);
659 return out != 0 && in != 0;
662 /* Check to see if an ADC has power */
663 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
668 in = is_connected_input_ep(w);
669 dapm_clear_walk(w->codec);
672 return dapm_generic_check_power(w);
676 /* Check to see if a DAC has power */
677 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
682 out = is_connected_output_ep(w);
683 dapm_clear_walk(w->codec);
686 return dapm_generic_check_power(w);
690 /* Check to see if a power supply is needed */
691 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
693 struct snd_soc_dapm_path *path;
696 /* Check if one of our outputs is connected */
697 list_for_each_entry(path, &w->sinks, list_source) {
698 if (path->sink && path->sink->power_check &&
699 path->sink->power_check(path->sink)) {
705 dapm_clear_walk(w->codec);
710 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
711 struct snd_soc_dapm_widget *b,
714 if (sort[a->id] != sort[b->id])
715 return sort[a->id] - sort[b->id];
716 if (a->reg != b->reg)
717 return a->reg - b->reg;
722 /* Insert a widget in order into a DAPM power sequence. */
723 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
724 struct list_head *list,
727 struct snd_soc_dapm_widget *w;
729 list_for_each_entry(w, list, power_list)
730 if (dapm_seq_compare(new_widget, w, sort) < 0) {
731 list_add_tail(&new_widget->power_list, &w->power_list);
735 list_add_tail(&new_widget->power_list, list);
738 /* Apply the coalesced changes from a DAPM sequence */
739 static void dapm_seq_run_coalesced(struct snd_soc_codec *codec,
740 struct list_head *pending)
742 struct snd_soc_dapm_widget *w;
744 unsigned int value = 0;
745 unsigned int mask = 0;
746 unsigned int cur_mask;
748 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
751 list_for_each_entry(w, pending, power_list) {
752 cur_mask = 1 << w->shift;
753 BUG_ON(reg != w->reg);
764 pop_dbg(codec->pop_time,
765 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
766 w->name, reg, value, mask);
768 /* power up pre event */
769 if (w->power && w->event &&
770 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
771 pop_dbg(codec->pop_time, "pop test : %s PRE_PMU\n",
773 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
775 pr_err("%s: pre event failed: %d\n",
779 /* power down pre event */
780 if (!w->power && w->event &&
781 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
782 pop_dbg(codec->pop_time, "pop test : %s PRE_PMD\n",
784 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
786 pr_err("%s: pre event failed: %d\n",
790 /* Lower PGA volume to reduce pops */
791 if (w->id == snd_soc_dapm_pga && !w->power)
792 dapm_set_pga(w, w->power);
796 pop_dbg(codec->pop_time,
797 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
798 value, mask, reg, codec->pop_time);
799 pop_wait(codec->pop_time);
800 snd_soc_update_bits(codec, reg, mask, value);
803 list_for_each_entry(w, pending, power_list) {
804 /* Raise PGA volume to reduce pops */
805 if (w->id == snd_soc_dapm_pga && w->power)
806 dapm_set_pga(w, w->power);
808 /* power up post event */
809 if (w->power && w->event &&
810 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
811 pop_dbg(codec->pop_time, "pop test : %s POST_PMU\n",
814 NULL, SND_SOC_DAPM_POST_PMU);
816 pr_err("%s: post event failed: %d\n",
820 /* power down post event */
821 if (!w->power && w->event &&
822 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
823 pop_dbg(codec->pop_time, "pop test : %s POST_PMD\n",
825 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
827 pr_err("%s: post event failed: %d\n",
833 /* Apply a DAPM power sequence.
835 * We walk over a pre-sorted list of widgets to apply power to. In
836 * order to minimise the number of writes to the device required
837 * multiple widgets will be updated in a single write where possible.
838 * Currently anything that requires more than a single write is not
841 static void dapm_seq_run(struct snd_soc_codec *codec, struct list_head *list,
842 int event, int sort[])
844 struct snd_soc_dapm_widget *w, *n;
847 int cur_reg = SND_SOC_NOPM;
850 list_for_each_entry_safe(w, n, list, power_list) {
853 /* Do we need to apply any queued changes? */
854 if (sort[w->id] != cur_sort || w->reg != cur_reg) {
855 if (!list_empty(&pending))
856 dapm_seq_run_coalesced(codec, &pending);
858 INIT_LIST_HEAD(&pending);
860 cur_reg = SND_SOC_NOPM;
864 case snd_soc_dapm_pre:
866 list_for_each_entry_safe_continue(w, n, list,
869 if (event == SND_SOC_DAPM_STREAM_START)
871 NULL, SND_SOC_DAPM_PRE_PMU);
872 else if (event == SND_SOC_DAPM_STREAM_STOP)
874 NULL, SND_SOC_DAPM_PRE_PMD);
877 case snd_soc_dapm_post:
879 list_for_each_entry_safe_continue(w, n, list,
882 if (event == SND_SOC_DAPM_STREAM_START)
884 NULL, SND_SOC_DAPM_POST_PMU);
885 else if (event == SND_SOC_DAPM_STREAM_STOP)
887 NULL, SND_SOC_DAPM_POST_PMD);
890 case snd_soc_dapm_input:
891 case snd_soc_dapm_output:
892 case snd_soc_dapm_hp:
893 case snd_soc_dapm_mic:
894 case snd_soc_dapm_line:
895 case snd_soc_dapm_spk:
896 /* No register support currently */
897 ret = dapm_generic_apply_power(w);
901 /* Queue it up for application */
902 cur_sort = sort[w->id];
904 list_move(&w->power_list, &pending);
909 pr_err("Failed to apply widget power: %d\n",
913 if (!list_empty(&pending))
914 dapm_seq_run_coalesced(codec, &pending);
918 * Scan each dapm widget for complete audio path.
919 * A complete path is a route that has valid endpoints i.e.:-
921 * o DAC to output pin.
922 * o Input Pin to ADC.
923 * o Input pin to Output pin (bypass, sidetone)
924 * o DAC to ADC (loopback).
926 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
928 struct snd_soc_device *socdev = codec->socdev;
929 struct snd_soc_dapm_widget *w;
931 LIST_HEAD(down_list);
936 /* Check which widgets we need to power and store them in
937 * lists indicating if they should be powered up or down.
939 list_for_each_entry(w, &codec->dapm_widgets, list) {
941 case snd_soc_dapm_pre:
942 dapm_seq_insert(w, &down_list, dapm_down_seq);
944 case snd_soc_dapm_post:
945 dapm_seq_insert(w, &up_list, dapm_up_seq);
952 power = w->power_check(w);
956 if (w->power == power)
960 dapm_seq_insert(w, &up_list, dapm_up_seq);
962 dapm_seq_insert(w, &down_list, dapm_down_seq);
969 /* If there are no DAPM widgets then try to figure out power from the
972 if (list_empty(&codec->dapm_widgets)) {
974 case SND_SOC_DAPM_STREAM_START:
975 case SND_SOC_DAPM_STREAM_RESUME:
978 case SND_SOC_DAPM_STREAM_NOP:
979 sys_power = codec->bias_level != SND_SOC_BIAS_STANDBY;
985 /* If we're changing to all on or all off then prepare */
986 if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
987 (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {
988 ret = snd_soc_dapm_set_bias_level(socdev,
989 SND_SOC_BIAS_PREPARE);
991 pr_err("Failed to prepare bias: %d\n", ret);
994 /* Power down widgets first; try to avoid amplifying pops. */
995 dapm_seq_run(codec, &down_list, event, dapm_down_seq);
998 dapm_seq_run(codec, &up_list, event, dapm_up_seq);
1000 /* If we just powered the last thing off drop to standby bias */
1001 if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
1002 ret = snd_soc_dapm_set_bias_level(socdev,
1003 SND_SOC_BIAS_STANDBY);
1005 pr_err("Failed to apply standby bias: %d\n", ret);
1008 /* If we just powered up then move to active bias */
1009 if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
1010 ret = snd_soc_dapm_set_bias_level(socdev,
1013 pr_err("Failed to apply active bias: %d\n", ret);
1016 pop_dbg(codec->pop_time, "DAPM sequencing finished, waiting %dms\n",
1023 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
1025 struct snd_soc_dapm_widget *w;
1026 struct snd_soc_dapm_path *p = NULL;
1029 printk("DAPM %s %s\n", codec->name, action);
1031 list_for_each_entry(w, &codec->dapm_widgets, list) {
1033 /* only display widgets that effect routing */
1035 case snd_soc_dapm_pre:
1036 case snd_soc_dapm_post:
1037 case snd_soc_dapm_vmid:
1039 case snd_soc_dapm_mux:
1040 case snd_soc_dapm_value_mux:
1041 case snd_soc_dapm_output:
1042 case snd_soc_dapm_input:
1043 case snd_soc_dapm_switch:
1044 case snd_soc_dapm_hp:
1045 case snd_soc_dapm_mic:
1046 case snd_soc_dapm_spk:
1047 case snd_soc_dapm_line:
1048 case snd_soc_dapm_micbias:
1049 case snd_soc_dapm_dac:
1050 case snd_soc_dapm_adc:
1051 case snd_soc_dapm_pga:
1052 case snd_soc_dapm_mixer:
1053 case snd_soc_dapm_mixer_named_ctl:
1054 case snd_soc_dapm_supply:
1056 in = is_connected_input_ep(w);
1057 dapm_clear_walk(w->codec);
1058 out = is_connected_output_ep(w);
1059 dapm_clear_walk(w->codec);
1060 printk("%s: %s in %d out %d\n", w->name,
1061 w->power ? "On":"Off",in, out);
1063 list_for_each_entry(p, &w->sources, list_sink) {
1065 printk(" in %s %s\n", p->name ? p->name : "static",
1068 list_for_each_entry(p, &w->sinks, list_source) {
1070 printk(" out %s %s\n", p->name ? p->name : "static",
1080 /* test and update the power status of a mux widget */
1081 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1082 struct snd_kcontrol *kcontrol, int mask,
1083 int mux, int val, struct soc_enum *e)
1085 struct snd_soc_dapm_path *path;
1088 if (widget->id != snd_soc_dapm_mux &&
1089 widget->id != snd_soc_dapm_value_mux)
1092 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
1095 /* find dapm widget path assoc with kcontrol */
1096 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1097 if (path->kcontrol != kcontrol)
1100 if (!path->name || !e->texts[mux])
1104 /* we now need to match the string in the enum to the path */
1105 if (!(strcmp(path->name, e->texts[mux])))
1106 path->connect = 1; /* new connection */
1108 path->connect = 0; /* old connection must be powered down */
1112 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1113 dump_dapm(widget->codec, "mux power update");
1119 /* test and update the power status of a mixer or switch widget */
1120 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1121 struct snd_kcontrol *kcontrol, int reg,
1122 int val_mask, int val, int invert)
1124 struct snd_soc_dapm_path *path;
1127 if (widget->id != snd_soc_dapm_mixer &&
1128 widget->id != snd_soc_dapm_mixer_named_ctl &&
1129 widget->id != snd_soc_dapm_switch)
1132 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
1135 /* find dapm widget path assoc with kcontrol */
1136 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1137 if (path->kcontrol != kcontrol)
1140 /* found, now check type */
1143 /* new connection */
1144 path->connect = invert ? 0:1;
1146 /* old connection must be powered down */
1147 path->connect = invert ? 1:0;
1152 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1153 dump_dapm(widget->codec, "mixer power update");
1159 /* show dapm widget status in sys fs */
1160 static ssize_t dapm_widget_show(struct device *dev,
1161 struct device_attribute *attr, char *buf)
1163 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1164 struct snd_soc_codec *codec = devdata->card->codec;
1165 struct snd_soc_dapm_widget *w;
1167 char *state = "not set";
1169 list_for_each_entry(w, &codec->dapm_widgets, list) {
1171 /* only display widgets that burnm power */
1173 case snd_soc_dapm_hp:
1174 case snd_soc_dapm_mic:
1175 case snd_soc_dapm_spk:
1176 case snd_soc_dapm_line:
1177 case snd_soc_dapm_micbias:
1178 case snd_soc_dapm_dac:
1179 case snd_soc_dapm_adc:
1180 case snd_soc_dapm_pga:
1181 case snd_soc_dapm_mixer:
1182 case snd_soc_dapm_mixer_named_ctl:
1183 case snd_soc_dapm_supply:
1185 count += sprintf(buf + count, "%s: %s\n",
1186 w->name, w->power ? "On":"Off");
1193 switch (codec->bias_level) {
1194 case SND_SOC_BIAS_ON:
1197 case SND_SOC_BIAS_PREPARE:
1200 case SND_SOC_BIAS_STANDBY:
1203 case SND_SOC_BIAS_OFF:
1207 count += sprintf(buf + count, "PM State: %s\n", state);
1212 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1214 int snd_soc_dapm_sys_add(struct device *dev)
1216 return device_create_file(dev, &dev_attr_dapm_widget);
1219 static void snd_soc_dapm_sys_remove(struct device *dev)
1221 device_remove_file(dev, &dev_attr_dapm_widget);
1224 /* free all dapm widgets and resources */
1225 static void dapm_free_widgets(struct snd_soc_codec *codec)
1227 struct snd_soc_dapm_widget *w, *next_w;
1228 struct snd_soc_dapm_path *p, *next_p;
1230 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
1235 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
1237 kfree(p->long_name);
1242 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
1243 const char *pin, int status)
1245 struct snd_soc_dapm_widget *w;
1247 list_for_each_entry(w, &codec->dapm_widgets, list) {
1248 if (!strcmp(w->name, pin)) {
1249 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
1250 w->connected = status;
1255 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
1260 * snd_soc_dapm_sync - scan and power dapm paths
1261 * @codec: audio codec
1263 * Walks all dapm audio paths and powers widgets according to their
1264 * stream or path usage.
1266 * Returns 0 for success.
1268 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
1270 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1271 dump_dapm(codec, "sync");
1274 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1276 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
1277 const char *sink, const char *control, const char *source)
1279 struct snd_soc_dapm_path *path;
1280 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1283 /* find src and dest widgets */
1284 list_for_each_entry(w, &codec->dapm_widgets, list) {
1286 if (!wsink && !(strcmp(w->name, sink))) {
1290 if (!wsource && !(strcmp(w->name, source))) {
1295 if (wsource == NULL || wsink == NULL)
1298 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1302 path->source = wsource;
1304 INIT_LIST_HEAD(&path->list);
1305 INIT_LIST_HEAD(&path->list_source);
1306 INIT_LIST_HEAD(&path->list_sink);
1308 /* check for external widgets */
1309 if (wsink->id == snd_soc_dapm_input) {
1310 if (wsource->id == snd_soc_dapm_micbias ||
1311 wsource->id == snd_soc_dapm_mic ||
1312 wsource->id == snd_soc_dapm_line ||
1313 wsource->id == snd_soc_dapm_output)
1316 if (wsource->id == snd_soc_dapm_output) {
1317 if (wsink->id == snd_soc_dapm_spk ||
1318 wsink->id == snd_soc_dapm_hp ||
1319 wsink->id == snd_soc_dapm_line ||
1320 wsink->id == snd_soc_dapm_input)
1324 /* connect static paths */
1325 if (control == NULL) {
1326 list_add(&path->list, &codec->dapm_paths);
1327 list_add(&path->list_sink, &wsink->sources);
1328 list_add(&path->list_source, &wsource->sinks);
1333 /* connect dynamic paths */
1335 case snd_soc_dapm_adc:
1336 case snd_soc_dapm_dac:
1337 case snd_soc_dapm_pga:
1338 case snd_soc_dapm_input:
1339 case snd_soc_dapm_output:
1340 case snd_soc_dapm_micbias:
1341 case snd_soc_dapm_vmid:
1342 case snd_soc_dapm_pre:
1343 case snd_soc_dapm_post:
1344 case snd_soc_dapm_supply:
1345 list_add(&path->list, &codec->dapm_paths);
1346 list_add(&path->list_sink, &wsink->sources);
1347 list_add(&path->list_source, &wsource->sinks);
1350 case snd_soc_dapm_mux:
1351 case snd_soc_dapm_value_mux:
1352 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1353 &wsink->kcontrols[0]);
1357 case snd_soc_dapm_switch:
1358 case snd_soc_dapm_mixer:
1359 case snd_soc_dapm_mixer_named_ctl:
1360 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1364 case snd_soc_dapm_hp:
1365 case snd_soc_dapm_mic:
1366 case snd_soc_dapm_line:
1367 case snd_soc_dapm_spk:
1368 list_add(&path->list, &codec->dapm_paths);
1369 list_add(&path->list_sink, &wsink->sources);
1370 list_add(&path->list_source, &wsource->sinks);
1377 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1384 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1386 * @route: audio routes
1387 * @num: number of routes
1389 * Connects 2 dapm widgets together via a named audio path. The sink is
1390 * the widget receiving the audio signal, whilst the source is the sender
1391 * of the audio signal.
1393 * Returns 0 for success else error. On error all resources can be freed
1394 * with a call to snd_soc_card_free().
1396 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1397 const struct snd_soc_dapm_route *route, int num)
1401 for (i = 0; i < num; i++) {
1402 ret = snd_soc_dapm_add_route(codec, route->sink,
1403 route->control, route->source);
1405 printk(KERN_ERR "Failed to add route %s->%s\n",
1415 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1418 * snd_soc_dapm_new_widgets - add new dapm widgets
1419 * @codec: audio codec
1421 * Checks the codec for any new dapm widgets and creates them if found.
1423 * Returns 0 for success.
1425 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1427 struct snd_soc_dapm_widget *w;
1429 list_for_each_entry(w, &codec->dapm_widgets, list)
1435 case snd_soc_dapm_switch:
1436 case snd_soc_dapm_mixer:
1437 case snd_soc_dapm_mixer_named_ctl:
1438 w->power_check = dapm_generic_check_power;
1439 dapm_new_mixer(codec, w);
1441 case snd_soc_dapm_mux:
1442 case snd_soc_dapm_value_mux:
1443 w->power_check = dapm_generic_check_power;
1444 dapm_new_mux(codec, w);
1446 case snd_soc_dapm_adc:
1447 w->power_check = dapm_adc_check_power;
1449 case snd_soc_dapm_dac:
1450 w->power_check = dapm_dac_check_power;
1452 case snd_soc_dapm_pga:
1453 w->power_check = dapm_generic_check_power;
1454 dapm_new_pga(codec, w);
1456 case snd_soc_dapm_input:
1457 case snd_soc_dapm_output:
1458 case snd_soc_dapm_micbias:
1459 case snd_soc_dapm_spk:
1460 case snd_soc_dapm_hp:
1461 case snd_soc_dapm_mic:
1462 case snd_soc_dapm_line:
1463 w->power_check = dapm_generic_check_power;
1465 case snd_soc_dapm_supply:
1466 w->power_check = dapm_supply_check_power;
1467 case snd_soc_dapm_vmid:
1468 case snd_soc_dapm_pre:
1469 case snd_soc_dapm_post:
1475 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1478 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1481 * snd_soc_dapm_get_volsw - dapm mixer get callback
1482 * @kcontrol: mixer control
1483 * @ucontrol: control element information
1485 * Callback to get the value of a dapm mixer control.
1487 * Returns 0 for success.
1489 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1490 struct snd_ctl_elem_value *ucontrol)
1492 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1493 struct soc_mixer_control *mc =
1494 (struct soc_mixer_control *)kcontrol->private_value;
1495 unsigned int reg = mc->reg;
1496 unsigned int shift = mc->shift;
1497 unsigned int rshift = mc->rshift;
1499 unsigned int invert = mc->invert;
1500 unsigned int mask = (1 << fls(max)) - 1;
1502 /* return the saved value if we are powered down */
1503 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1504 ucontrol->value.integer.value[0] = widget->saved_value;
1508 ucontrol->value.integer.value[0] =
1509 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1510 if (shift != rshift)
1511 ucontrol->value.integer.value[1] =
1512 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1514 ucontrol->value.integer.value[0] =
1515 max - ucontrol->value.integer.value[0];
1516 if (shift != rshift)
1517 ucontrol->value.integer.value[1] =
1518 max - ucontrol->value.integer.value[1];
1523 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1526 * snd_soc_dapm_put_volsw - dapm mixer set callback
1527 * @kcontrol: mixer control
1528 * @ucontrol: control element information
1530 * Callback to set the value of a dapm mixer control.
1532 * Returns 0 for success.
1534 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1535 struct snd_ctl_elem_value *ucontrol)
1537 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1538 struct soc_mixer_control *mc =
1539 (struct soc_mixer_control *)kcontrol->private_value;
1540 unsigned int reg = mc->reg;
1541 unsigned int shift = mc->shift;
1542 unsigned int rshift = mc->rshift;
1544 unsigned int mask = (1 << fls(max)) - 1;
1545 unsigned int invert = mc->invert;
1546 unsigned int val, val2, val_mask;
1549 val = (ucontrol->value.integer.value[0] & mask);
1553 val_mask = mask << shift;
1555 if (shift != rshift) {
1556 val2 = (ucontrol->value.integer.value[1] & mask);
1559 val_mask |= mask << rshift;
1560 val |= val2 << rshift;
1563 mutex_lock(&widget->codec->mutex);
1564 widget->value = val;
1566 /* save volume value if the widget is powered down */
1567 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1568 widget->saved_value = val;
1569 mutex_unlock(&widget->codec->mutex);
1573 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1574 if (widget->event) {
1575 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1576 ret = widget->event(widget, kcontrol,
1577 SND_SOC_DAPM_PRE_REG);
1583 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1584 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1585 ret = widget->event(widget, kcontrol,
1586 SND_SOC_DAPM_POST_REG);
1588 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1591 mutex_unlock(&widget->codec->mutex);
1594 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1597 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1598 * @kcontrol: mixer control
1599 * @ucontrol: control element information
1601 * Callback to get the value of a dapm enumerated double mixer control.
1603 * Returns 0 for success.
1605 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1606 struct snd_ctl_elem_value *ucontrol)
1608 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1609 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1610 unsigned int val, bitmask;
1612 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1614 val = snd_soc_read(widget->codec, e->reg);
1615 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1616 if (e->shift_l != e->shift_r)
1617 ucontrol->value.enumerated.item[1] =
1618 (val >> e->shift_r) & (bitmask - 1);
1622 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1625 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1626 * @kcontrol: mixer control
1627 * @ucontrol: control element information
1629 * Callback to set the value of a dapm enumerated double mixer control.
1631 * Returns 0 for success.
1633 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1634 struct snd_ctl_elem_value *ucontrol)
1636 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1637 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1638 unsigned int val, mux;
1639 unsigned int mask, bitmask;
1642 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1644 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1646 mux = ucontrol->value.enumerated.item[0];
1647 val = mux << e->shift_l;
1648 mask = (bitmask - 1) << e->shift_l;
1649 if (e->shift_l != e->shift_r) {
1650 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1652 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1653 mask |= (bitmask - 1) << e->shift_r;
1656 mutex_lock(&widget->codec->mutex);
1657 widget->value = val;
1658 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1659 if (widget->event) {
1660 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1661 ret = widget->event(widget,
1662 kcontrol, SND_SOC_DAPM_PRE_REG);
1666 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1667 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1668 ret = widget->event(widget,
1669 kcontrol, SND_SOC_DAPM_POST_REG);
1671 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1674 mutex_unlock(&widget->codec->mutex);
1677 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1680 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1682 * @kcontrol: mixer control
1683 * @ucontrol: control element information
1685 * Callback to get the value of a dapm semi enumerated double mixer control.
1687 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1688 * used for handling bitfield coded enumeration for example.
1690 * Returns 0 for success.
1692 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1693 struct snd_ctl_elem_value *ucontrol)
1695 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1696 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1697 unsigned int reg_val, val, mux;
1699 reg_val = snd_soc_read(widget->codec, e->reg);
1700 val = (reg_val >> e->shift_l) & e->mask;
1701 for (mux = 0; mux < e->max; mux++) {
1702 if (val == e->values[mux])
1705 ucontrol->value.enumerated.item[0] = mux;
1706 if (e->shift_l != e->shift_r) {
1707 val = (reg_val >> e->shift_r) & e->mask;
1708 for (mux = 0; mux < e->max; mux++) {
1709 if (val == e->values[mux])
1712 ucontrol->value.enumerated.item[1] = mux;
1717 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1720 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1722 * @kcontrol: mixer control
1723 * @ucontrol: control element information
1725 * Callback to set the value of a dapm semi enumerated double mixer control.
1727 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1728 * used for handling bitfield coded enumeration for example.
1730 * Returns 0 for success.
1732 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1733 struct snd_ctl_elem_value *ucontrol)
1735 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1736 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1737 unsigned int val, mux;
1741 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1743 mux = ucontrol->value.enumerated.item[0];
1744 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1745 mask = e->mask << e->shift_l;
1746 if (e->shift_l != e->shift_r) {
1747 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1749 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1750 mask |= e->mask << e->shift_r;
1753 mutex_lock(&widget->codec->mutex);
1754 widget->value = val;
1755 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1756 if (widget->event) {
1757 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1758 ret = widget->event(widget,
1759 kcontrol, SND_SOC_DAPM_PRE_REG);
1763 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1764 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1765 ret = widget->event(widget,
1766 kcontrol, SND_SOC_DAPM_POST_REG);
1768 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1771 mutex_unlock(&widget->codec->mutex);
1774 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1777 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1779 * @kcontrol: mixer control
1780 * @uinfo: control element information
1782 * Callback to provide information about a pin switch control.
1784 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
1785 struct snd_ctl_elem_info *uinfo)
1787 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1789 uinfo->value.integer.min = 0;
1790 uinfo->value.integer.max = 1;
1794 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
1797 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1799 * @kcontrol: mixer control
1802 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
1803 struct snd_ctl_elem_value *ucontrol)
1805 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1806 const char *pin = (const char *)kcontrol->private_value;
1808 mutex_lock(&codec->mutex);
1810 ucontrol->value.integer.value[0] =
1811 snd_soc_dapm_get_pin_status(codec, pin);
1813 mutex_unlock(&codec->mutex);
1817 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
1820 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1822 * @kcontrol: mixer control
1825 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
1826 struct snd_ctl_elem_value *ucontrol)
1828 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1829 const char *pin = (const char *)kcontrol->private_value;
1831 mutex_lock(&codec->mutex);
1833 if (ucontrol->value.integer.value[0])
1834 snd_soc_dapm_enable_pin(codec, pin);
1836 snd_soc_dapm_disable_pin(codec, pin);
1838 snd_soc_dapm_sync(codec);
1840 mutex_unlock(&codec->mutex);
1844 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
1847 * snd_soc_dapm_new_control - create new dapm control
1848 * @codec: audio codec
1849 * @widget: widget template
1851 * Creates a new dapm control based upon the template.
1853 * Returns 0 for success else error.
1855 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1856 const struct snd_soc_dapm_widget *widget)
1858 struct snd_soc_dapm_widget *w;
1860 if ((w = dapm_cnew_widget(widget)) == NULL)
1864 INIT_LIST_HEAD(&w->sources);
1865 INIT_LIST_HEAD(&w->sinks);
1866 INIT_LIST_HEAD(&w->list);
1867 list_add(&w->list, &codec->dapm_widgets);
1869 /* machine layer set ups unconnected pins and insertions */
1873 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1876 * snd_soc_dapm_new_controls - create new dapm controls
1877 * @codec: audio codec
1878 * @widget: widget array
1879 * @num: number of widgets
1881 * Creates new DAPM controls based upon the templates.
1883 * Returns 0 for success else error.
1885 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1886 const struct snd_soc_dapm_widget *widget,
1891 for (i = 0; i < num; i++) {
1892 ret = snd_soc_dapm_new_control(codec, widget);
1895 "ASoC: Failed to create DAPM control %s: %d\n",
1903 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1907 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1908 * @codec: audio codec
1909 * @stream: stream name
1910 * @event: stream event
1912 * Sends a stream event to the dapm core. The core then makes any
1913 * necessary widget power changes.
1915 * Returns 0 for success else error.
1917 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1918 char *stream, int event)
1920 struct snd_soc_dapm_widget *w;
1925 mutex_lock(&codec->mutex);
1926 list_for_each_entry(w, &codec->dapm_widgets, list)
1930 pr_debug("widget %s\n %s stream %s event %d\n",
1931 w->name, w->sname, stream, event);
1932 if (strstr(w->sname, stream)) {
1934 case SND_SOC_DAPM_STREAM_START:
1937 case SND_SOC_DAPM_STREAM_STOP:
1940 case SND_SOC_DAPM_STREAM_SUSPEND:
1945 case SND_SOC_DAPM_STREAM_RESUME:
1951 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
1953 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
1958 mutex_unlock(&codec->mutex);
1960 dapm_power_widgets(codec, event);
1961 dump_dapm(codec, __func__);
1964 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
1967 * snd_soc_dapm_enable_pin - enable pin.
1971 * Enables input/output pin and its parents or children widgets iff there is
1972 * a valid audio route and active audio stream.
1973 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1974 * do any widget power switching.
1976 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
1978 return snd_soc_dapm_set_pin(codec, pin, 1);
1980 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
1983 * snd_soc_dapm_disable_pin - disable pin.
1987 * Disables input/output pin and its parents or children widgets.
1988 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1989 * do any widget power switching.
1991 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
1993 return snd_soc_dapm_set_pin(codec, pin, 0);
1995 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
1998 * snd_soc_dapm_nc_pin - permanently disable pin.
2002 * Marks the specified pin as being not connected, disabling it along
2003 * any parent or child widgets. At present this is identical to
2004 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2005 * additional things such as disabling controls which only affect
2006 * paths through the pin.
2008 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2009 * do any widget power switching.
2011 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
2013 return snd_soc_dapm_set_pin(codec, pin, 0);
2015 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2018 * snd_soc_dapm_get_pin_status - get audio pin status
2019 * @codec: audio codec
2020 * @pin: audio signal pin endpoint (or start point)
2022 * Get audio pin status - connected or disconnected.
2024 * Returns 1 for connected otherwise 0.
2026 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
2028 struct snd_soc_dapm_widget *w;
2030 list_for_each_entry(w, &codec->dapm_widgets, list) {
2031 if (!strcmp(w->name, pin))
2032 return w->connected;
2037 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2040 * snd_soc_dapm_free - free dapm resources
2041 * @socdev: SoC device
2043 * Free all dapm widgets and resources.
2045 void snd_soc_dapm_free(struct snd_soc_device *socdev)
2047 struct snd_soc_codec *codec = socdev->card->codec;
2049 snd_soc_dapm_sys_remove(socdev->dev);
2050 dapm_free_widgets(codec);
2052 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2055 * snd_soc_dapm_shutdown - callback for system shutdown
2057 void snd_soc_dapm_shutdown(struct snd_soc_device *socdev)
2059 struct snd_soc_codec *codec = socdev->card->codec;
2060 struct snd_soc_dapm_widget *w;
2061 LIST_HEAD(down_list);
2064 list_for_each_entry(w, &codec->dapm_widgets, list) {
2066 dapm_seq_insert(w, &down_list, dapm_down_seq);
2072 /* If there were no widgets to power down we're already in
2076 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE);
2077 dapm_seq_run(codec, &down_list, 0, dapm_down_seq);
2078 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY);
2081 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF);
2084 /* Module information */
2085 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2086 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2087 MODULE_LICENSE("GPL");