2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <linux/debugfs.h>
41 #include <sound/core.h>
42 #include <sound/pcm.h>
43 #include <sound/pcm_params.h>
44 #include <sound/soc-dapm.h>
45 #include <sound/initval.h>
49 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
51 #define dump_dapm(codec, action)
54 /* dapm power sequences - make this per codec in the future */
55 static int dapm_up_seq[] = {
56 [snd_soc_dapm_pre] = 0,
57 [snd_soc_dapm_supply] = 1,
58 [snd_soc_dapm_micbias] = 2,
59 [snd_soc_dapm_aif_in] = 3,
60 [snd_soc_dapm_aif_out] = 3,
61 [snd_soc_dapm_mic] = 4,
62 [snd_soc_dapm_mux] = 5,
63 [snd_soc_dapm_value_mux] = 5,
64 [snd_soc_dapm_dac] = 6,
65 [snd_soc_dapm_mixer] = 7,
66 [snd_soc_dapm_mixer_named_ctl] = 7,
67 [snd_soc_dapm_pga] = 8,
68 [snd_soc_dapm_adc] = 9,
69 [snd_soc_dapm_hp] = 10,
70 [snd_soc_dapm_spk] = 10,
71 [snd_soc_dapm_post] = 11,
74 static int dapm_down_seq[] = {
75 [snd_soc_dapm_pre] = 0,
76 [snd_soc_dapm_adc] = 1,
77 [snd_soc_dapm_hp] = 2,
78 [snd_soc_dapm_spk] = 2,
79 [snd_soc_dapm_pga] = 4,
80 [snd_soc_dapm_mixer_named_ctl] = 5,
81 [snd_soc_dapm_mixer] = 5,
82 [snd_soc_dapm_dac] = 6,
83 [snd_soc_dapm_mic] = 7,
84 [snd_soc_dapm_micbias] = 8,
85 [snd_soc_dapm_mux] = 9,
86 [snd_soc_dapm_value_mux] = 9,
87 [snd_soc_dapm_aif_in] = 10,
88 [snd_soc_dapm_aif_out] = 10,
89 [snd_soc_dapm_supply] = 11,
90 [snd_soc_dapm_post] = 12,
93 static void pop_wait(u32 pop_time)
96 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
99 static void pop_dbg(u32 pop_time, const char *fmt, ...)
113 /* create a new dapm widget */
114 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
115 const struct snd_soc_dapm_widget *_widget)
117 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
121 * snd_soc_dapm_set_bias_level - set the bias level for the system
122 * @socdev: audio device
123 * @level: level to configure
125 * Configure the bias (power) levels for the SoC audio device.
127 * Returns 0 for success else error.
129 static int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
130 enum snd_soc_bias_level level)
132 struct snd_soc_card *card = socdev->card;
133 struct snd_soc_codec *codec = socdev->card->codec;
137 case SND_SOC_BIAS_ON:
138 dev_dbg(socdev->dev, "Setting full bias\n");
140 case SND_SOC_BIAS_PREPARE:
141 dev_dbg(socdev->dev, "Setting bias prepare\n");
143 case SND_SOC_BIAS_STANDBY:
144 dev_dbg(socdev->dev, "Setting standby bias\n");
146 case SND_SOC_BIAS_OFF:
147 dev_dbg(socdev->dev, "Setting bias off\n");
150 dev_err(socdev->dev, "Setting invalid bias %d\n", level);
154 if (card->set_bias_level)
155 ret = card->set_bias_level(card, level);
157 if (codec->set_bias_level)
158 ret = codec->set_bias_level(codec, level);
160 codec->bias_level = level;
166 /* set up initial codec paths */
167 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
168 struct snd_soc_dapm_path *p, int i)
171 case snd_soc_dapm_switch:
172 case snd_soc_dapm_mixer:
173 case snd_soc_dapm_mixer_named_ctl: {
175 struct soc_mixer_control *mc = (struct soc_mixer_control *)
176 w->kcontrols[i].private_value;
177 unsigned int reg = mc->reg;
178 unsigned int shift = mc->shift;
180 unsigned int mask = (1 << fls(max)) - 1;
181 unsigned int invert = mc->invert;
183 val = snd_soc_read(w->codec, reg);
184 val = (val >> shift) & mask;
186 if ((invert && !val) || (!invert && val))
192 case snd_soc_dapm_mux: {
193 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
194 int val, item, bitmask;
196 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
198 val = snd_soc_read(w->codec, e->reg);
199 item = (val >> e->shift_l) & (bitmask - 1);
202 for (i = 0; i < e->max; i++) {
203 if (!(strcmp(p->name, e->texts[i])) && item == i)
208 case snd_soc_dapm_value_mux: {
209 struct soc_enum *e = (struct soc_enum *)
210 w->kcontrols[i].private_value;
213 val = snd_soc_read(w->codec, e->reg);
214 val = (val >> e->shift_l) & e->mask;
215 for (item = 0; item < e->max; item++) {
216 if (val == e->values[item])
221 for (i = 0; i < e->max; i++) {
222 if (!(strcmp(p->name, e->texts[i])) && item == i)
227 /* does not effect routing - always connected */
228 case snd_soc_dapm_pga:
229 case snd_soc_dapm_output:
230 case snd_soc_dapm_adc:
231 case snd_soc_dapm_input:
232 case snd_soc_dapm_dac:
233 case snd_soc_dapm_micbias:
234 case snd_soc_dapm_vmid:
235 case snd_soc_dapm_supply:
236 case snd_soc_dapm_aif_in:
237 case snd_soc_dapm_aif_out:
240 /* does effect routing - dynamically connected */
241 case snd_soc_dapm_hp:
242 case snd_soc_dapm_mic:
243 case snd_soc_dapm_spk:
244 case snd_soc_dapm_line:
245 case snd_soc_dapm_pre:
246 case snd_soc_dapm_post:
252 /* connect mux widget to its interconnecting audio paths */
253 static int dapm_connect_mux(struct snd_soc_codec *codec,
254 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
255 struct snd_soc_dapm_path *path, const char *control_name,
256 const struct snd_kcontrol_new *kcontrol)
258 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
261 for (i = 0; i < e->max; i++) {
262 if (!(strcmp(control_name, e->texts[i]))) {
263 list_add(&path->list, &codec->dapm_paths);
264 list_add(&path->list_sink, &dest->sources);
265 list_add(&path->list_source, &src->sinks);
266 path->name = (char*)e->texts[i];
267 dapm_set_path_status(dest, path, 0);
275 /* connect mixer widget to its interconnecting audio paths */
276 static int dapm_connect_mixer(struct snd_soc_codec *codec,
277 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
278 struct snd_soc_dapm_path *path, const char *control_name)
282 /* search for mixer kcontrol */
283 for (i = 0; i < dest->num_kcontrols; i++) {
284 if (!strcmp(control_name, dest->kcontrols[i].name)) {
285 list_add(&path->list, &codec->dapm_paths);
286 list_add(&path->list_sink, &dest->sources);
287 list_add(&path->list_source, &src->sinks);
288 path->name = dest->kcontrols[i].name;
289 dapm_set_path_status(dest, path, i);
296 /* update dapm codec register bits */
297 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
300 unsigned int old, new;
301 struct snd_soc_codec *codec = widget->codec;
303 /* check for valid widgets */
304 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
305 widget->id == snd_soc_dapm_output ||
306 widget->id == snd_soc_dapm_hp ||
307 widget->id == snd_soc_dapm_mic ||
308 widget->id == snd_soc_dapm_line ||
309 widget->id == snd_soc_dapm_spk)
312 power = widget->power;
314 power = (power ? 0:1);
316 old = snd_soc_read(codec, widget->reg);
317 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
321 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
322 widget->name, widget->power ? "on" : "off",
324 snd_soc_write(codec, widget->reg, new);
325 pop_wait(codec->pop_time);
327 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
332 /* ramps the volume up or down to minimise pops before or after a
333 * DAPM power event */
334 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
336 const struct snd_kcontrol_new *k = widget->kcontrols;
338 if (widget->muted && !power)
340 if (!widget->muted && power)
343 if (widget->num_kcontrols && k) {
344 struct soc_mixer_control *mc =
345 (struct soc_mixer_control *)k->private_value;
346 unsigned int reg = mc->reg;
347 unsigned int shift = mc->shift;
349 unsigned int mask = (1 << fls(max)) - 1;
350 unsigned int invert = mc->invert;
354 /* power up has happended, increase volume to last level */
356 for (i = max; i > widget->saved_value; i--)
357 snd_soc_update_bits(widget->codec, reg, mask, i);
359 for (i = 0; i < widget->saved_value; i++)
360 snd_soc_update_bits(widget->codec, reg, mask, i);
364 /* power down is about to occur, decrease volume to mute */
365 int val = snd_soc_read(widget->codec, reg);
366 int i = widget->saved_value = (val >> shift) & mask;
368 for (; i < mask; i++)
369 snd_soc_update_bits(widget->codec, reg, mask, i);
372 snd_soc_update_bits(widget->codec, reg, mask, i);
380 /* create new dapm mixer control */
381 static int dapm_new_mixer(struct snd_soc_codec *codec,
382 struct snd_soc_dapm_widget *w)
386 struct snd_soc_dapm_path *path;
389 for (i = 0; i < w->num_kcontrols; i++) {
392 list_for_each_entry(path, &w->sources, list_sink) {
394 /* mixer/mux paths name must match control name */
395 if (path->name != (char*)w->kcontrols[i].name)
398 /* add dapm control with long name.
399 * for dapm_mixer this is the concatenation of the
400 * mixer and kcontrol name.
401 * for dapm_mixer_named_ctl this is simply the
404 name_len = strlen(w->kcontrols[i].name) + 1;
405 if (w->id != snd_soc_dapm_mixer_named_ctl)
406 name_len += 1 + strlen(w->name);
408 path->long_name = kmalloc(name_len, GFP_KERNEL);
410 if (path->long_name == NULL)
415 snprintf(path->long_name, name_len, "%s %s",
416 w->name, w->kcontrols[i].name);
418 case snd_soc_dapm_mixer_named_ctl:
419 snprintf(path->long_name, name_len, "%s",
420 w->kcontrols[i].name);
424 path->long_name[name_len - 1] = '\0';
426 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
428 ret = snd_ctl_add(codec->card, path->kcontrol);
430 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s: %d\n",
433 kfree(path->long_name);
434 path->long_name = NULL;
442 /* create new dapm mux control */
443 static int dapm_new_mux(struct snd_soc_codec *codec,
444 struct snd_soc_dapm_widget *w)
446 struct snd_soc_dapm_path *path = NULL;
447 struct snd_kcontrol *kcontrol;
450 if (!w->num_kcontrols) {
451 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
455 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
456 ret = snd_ctl_add(codec->card, kcontrol);
460 list_for_each_entry(path, &w->sources, list_sink)
461 path->kcontrol = kcontrol;
466 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
470 /* create new dapm volume control */
471 static int dapm_new_pga(struct snd_soc_codec *codec,
472 struct snd_soc_dapm_widget *w)
474 struct snd_kcontrol *kcontrol;
477 if (!w->num_kcontrols)
480 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
481 ret = snd_ctl_add(codec->card, kcontrol);
483 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
490 /* reset 'walked' bit for each dapm path */
491 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
493 struct snd_soc_dapm_path *p;
495 list_for_each_entry(p, &codec->dapm_paths, list)
500 * Recursively check for a completed path to an active or physically connected
501 * output widget. Returns number of complete paths.
503 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
505 struct snd_soc_dapm_path *path;
508 if (widget->id == snd_soc_dapm_supply)
511 switch (widget->id) {
512 case snd_soc_dapm_adc:
513 case snd_soc_dapm_aif_out:
520 if (widget->connected) {
521 /* connected pin ? */
522 if (widget->id == snd_soc_dapm_output && !widget->ext)
525 /* connected jack or spk ? */
526 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
527 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
531 list_for_each_entry(path, &widget->sinks, list_source) {
535 if (path->sink && path->connect) {
537 con += is_connected_output_ep(path->sink);
545 * Recursively check for a completed path to an active or physically connected
546 * input widget. Returns number of complete paths.
548 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
550 struct snd_soc_dapm_path *path;
553 if (widget->id == snd_soc_dapm_supply)
556 /* active stream ? */
557 switch (widget->id) {
558 case snd_soc_dapm_dac:
559 case snd_soc_dapm_aif_in:
566 if (widget->connected) {
567 /* connected pin ? */
568 if (widget->id == snd_soc_dapm_input && !widget->ext)
571 /* connected VMID/Bias for lower pops */
572 if (widget->id == snd_soc_dapm_vmid)
575 /* connected jack ? */
576 if (widget->id == snd_soc_dapm_mic ||
577 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
581 list_for_each_entry(path, &widget->sources, list_sink) {
585 if (path->source && path->connect) {
587 con += is_connected_input_ep(path->source);
595 * Handler for generic register modifier widget.
597 int dapm_reg_event(struct snd_soc_dapm_widget *w,
598 struct snd_kcontrol *kcontrol, int event)
602 if (SND_SOC_DAPM_EVENT_ON(event))
607 snd_soc_update_bits(w->codec, -(w->reg + 1),
608 w->mask << w->shift, val << w->shift);
612 EXPORT_SYMBOL_GPL(dapm_reg_event);
614 /* Standard power change method, used to apply power changes to most
617 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
621 /* call any power change event handlers */
623 pr_debug("power %s event for %s flags %x\n",
624 w->power ? "on" : "off",
625 w->name, w->event_flags);
627 /* power up pre event */
628 if (w->power && w->event &&
629 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
630 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
635 /* power down pre event */
636 if (!w->power && w->event &&
637 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
638 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
643 /* Lower PGA volume to reduce pops */
644 if (w->id == snd_soc_dapm_pga && !w->power)
645 dapm_set_pga(w, w->power);
649 /* Raise PGA volume to reduce pops */
650 if (w->id == snd_soc_dapm_pga && w->power)
651 dapm_set_pga(w, w->power);
653 /* power up post event */
654 if (w->power && w->event &&
655 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
657 NULL, SND_SOC_DAPM_POST_PMU);
662 /* power down post event */
663 if (!w->power && w->event &&
664 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
665 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
673 /* Generic check to see if a widget should be powered.
675 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
679 in = is_connected_input_ep(w);
680 dapm_clear_walk(w->codec);
681 out = is_connected_output_ep(w);
682 dapm_clear_walk(w->codec);
683 return out != 0 && in != 0;
686 /* Check to see if an ADC has power */
687 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
692 in = is_connected_input_ep(w);
693 dapm_clear_walk(w->codec);
696 return dapm_generic_check_power(w);
700 /* Check to see if a DAC has power */
701 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
706 out = is_connected_output_ep(w);
707 dapm_clear_walk(w->codec);
710 return dapm_generic_check_power(w);
714 /* Check to see if a power supply is needed */
715 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
717 struct snd_soc_dapm_path *path;
720 /* Check if one of our outputs is connected */
721 list_for_each_entry(path, &w->sinks, list_source) {
722 if (path->sink && path->sink->power_check &&
723 path->sink->power_check(path->sink)) {
729 dapm_clear_walk(w->codec);
734 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
735 struct snd_soc_dapm_widget *b,
738 if (sort[a->id] != sort[b->id])
739 return sort[a->id] - sort[b->id];
740 if (a->reg != b->reg)
741 return a->reg - b->reg;
746 /* Insert a widget in order into a DAPM power sequence. */
747 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
748 struct list_head *list,
751 struct snd_soc_dapm_widget *w;
753 list_for_each_entry(w, list, power_list)
754 if (dapm_seq_compare(new_widget, w, sort) < 0) {
755 list_add_tail(&new_widget->power_list, &w->power_list);
759 list_add_tail(&new_widget->power_list, list);
762 /* Apply the coalesced changes from a DAPM sequence */
763 static void dapm_seq_run_coalesced(struct snd_soc_codec *codec,
764 struct list_head *pending)
766 struct snd_soc_dapm_widget *w;
768 unsigned int value = 0;
769 unsigned int mask = 0;
770 unsigned int cur_mask;
772 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
775 list_for_each_entry(w, pending, power_list) {
776 cur_mask = 1 << w->shift;
777 BUG_ON(reg != w->reg);
788 pop_dbg(codec->pop_time,
789 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
790 w->name, reg, value, mask);
792 /* power up pre event */
793 if (w->power && w->event &&
794 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
795 pop_dbg(codec->pop_time, "pop test : %s PRE_PMU\n",
797 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
799 pr_err("%s: pre event failed: %d\n",
803 /* power down pre event */
804 if (!w->power && w->event &&
805 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
806 pop_dbg(codec->pop_time, "pop test : %s PRE_PMD\n",
808 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
810 pr_err("%s: pre event failed: %d\n",
814 /* Lower PGA volume to reduce pops */
815 if (w->id == snd_soc_dapm_pga && !w->power)
816 dapm_set_pga(w, w->power);
820 pop_dbg(codec->pop_time,
821 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
822 value, mask, reg, codec->pop_time);
823 pop_wait(codec->pop_time);
824 snd_soc_update_bits(codec, reg, mask, value);
827 list_for_each_entry(w, pending, power_list) {
828 /* Raise PGA volume to reduce pops */
829 if (w->id == snd_soc_dapm_pga && w->power)
830 dapm_set_pga(w, w->power);
832 /* power up post event */
833 if (w->power && w->event &&
834 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
835 pop_dbg(codec->pop_time, "pop test : %s POST_PMU\n",
838 NULL, SND_SOC_DAPM_POST_PMU);
840 pr_err("%s: post event failed: %d\n",
844 /* power down post event */
845 if (!w->power && w->event &&
846 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
847 pop_dbg(codec->pop_time, "pop test : %s POST_PMD\n",
849 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
851 pr_err("%s: post event failed: %d\n",
857 /* Apply a DAPM power sequence.
859 * We walk over a pre-sorted list of widgets to apply power to. In
860 * order to minimise the number of writes to the device required
861 * multiple widgets will be updated in a single write where possible.
862 * Currently anything that requires more than a single write is not
865 static void dapm_seq_run(struct snd_soc_codec *codec, struct list_head *list,
866 int event, int sort[])
868 struct snd_soc_dapm_widget *w, *n;
871 int cur_reg = SND_SOC_NOPM;
874 list_for_each_entry_safe(w, n, list, power_list) {
877 /* Do we need to apply any queued changes? */
878 if (sort[w->id] != cur_sort || w->reg != cur_reg) {
879 if (!list_empty(&pending))
880 dapm_seq_run_coalesced(codec, &pending);
882 INIT_LIST_HEAD(&pending);
884 cur_reg = SND_SOC_NOPM;
888 case snd_soc_dapm_pre:
890 list_for_each_entry_safe_continue(w, n, list,
893 if (event == SND_SOC_DAPM_STREAM_START)
895 NULL, SND_SOC_DAPM_PRE_PMU);
896 else if (event == SND_SOC_DAPM_STREAM_STOP)
898 NULL, SND_SOC_DAPM_PRE_PMD);
901 case snd_soc_dapm_post:
903 list_for_each_entry_safe_continue(w, n, list,
906 if (event == SND_SOC_DAPM_STREAM_START)
908 NULL, SND_SOC_DAPM_POST_PMU);
909 else if (event == SND_SOC_DAPM_STREAM_STOP)
911 NULL, SND_SOC_DAPM_POST_PMD);
914 case snd_soc_dapm_input:
915 case snd_soc_dapm_output:
916 case snd_soc_dapm_hp:
917 case snd_soc_dapm_mic:
918 case snd_soc_dapm_line:
919 case snd_soc_dapm_spk:
920 /* No register support currently */
921 ret = dapm_generic_apply_power(w);
925 /* Queue it up for application */
926 cur_sort = sort[w->id];
928 list_move(&w->power_list, &pending);
933 pr_err("Failed to apply widget power: %d\n",
937 if (!list_empty(&pending))
938 dapm_seq_run_coalesced(codec, &pending);
942 * Scan each dapm widget for complete audio path.
943 * A complete path is a route that has valid endpoints i.e.:-
945 * o DAC to output pin.
946 * o Input Pin to ADC.
947 * o Input pin to Output pin (bypass, sidetone)
948 * o DAC to ADC (loopback).
950 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
952 struct snd_soc_device *socdev = codec->socdev;
953 struct snd_soc_dapm_widget *w;
955 LIST_HEAD(down_list);
960 /* Check which widgets we need to power and store them in
961 * lists indicating if they should be powered up or down.
963 list_for_each_entry(w, &codec->dapm_widgets, list) {
965 case snd_soc_dapm_pre:
966 dapm_seq_insert(w, &down_list, dapm_down_seq);
968 case snd_soc_dapm_post:
969 dapm_seq_insert(w, &up_list, dapm_up_seq);
976 /* If we're suspending then pull down all the
979 case SND_SOC_DAPM_STREAM_SUSPEND:
984 power = w->power_check(w);
990 if (w->power == power)
994 dapm_seq_insert(w, &up_list, dapm_up_seq);
996 dapm_seq_insert(w, &down_list, dapm_down_seq);
1003 /* If there are no DAPM widgets then try to figure out power from the
1006 if (list_empty(&codec->dapm_widgets)) {
1008 case SND_SOC_DAPM_STREAM_START:
1009 case SND_SOC_DAPM_STREAM_RESUME:
1012 case SND_SOC_DAPM_STREAM_SUSPEND:
1015 case SND_SOC_DAPM_STREAM_NOP:
1016 sys_power = codec->bias_level != SND_SOC_BIAS_STANDBY;
1023 /* If we're changing to all on or all off then prepare */
1024 if ((sys_power && codec->bias_level == SND_SOC_BIAS_STANDBY) ||
1025 (!sys_power && codec->bias_level == SND_SOC_BIAS_ON)) {
1026 ret = snd_soc_dapm_set_bias_level(socdev,
1027 SND_SOC_BIAS_PREPARE);
1029 pr_err("Failed to prepare bias: %d\n", ret);
1032 /* Power down widgets first; try to avoid amplifying pops. */
1033 dapm_seq_run(codec, &down_list, event, dapm_down_seq);
1036 dapm_seq_run(codec, &up_list, event, dapm_up_seq);
1038 /* If we just powered the last thing off drop to standby bias */
1039 if (codec->bias_level == SND_SOC_BIAS_PREPARE && !sys_power) {
1040 ret = snd_soc_dapm_set_bias_level(socdev,
1041 SND_SOC_BIAS_STANDBY);
1043 pr_err("Failed to apply standby bias: %d\n", ret);
1046 /* If we just powered up then move to active bias */
1047 if (codec->bias_level == SND_SOC_BIAS_PREPARE && sys_power) {
1048 ret = snd_soc_dapm_set_bias_level(socdev,
1051 pr_err("Failed to apply active bias: %d\n", ret);
1054 pop_dbg(codec->pop_time, "DAPM sequencing finished, waiting %dms\n",
1061 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
1063 struct snd_soc_dapm_widget *w;
1064 struct snd_soc_dapm_path *p = NULL;
1067 printk("DAPM %s %s\n", codec->name, action);
1069 list_for_each_entry(w, &codec->dapm_widgets, list) {
1071 /* only display widgets that effect routing */
1073 case snd_soc_dapm_pre:
1074 case snd_soc_dapm_post:
1075 case snd_soc_dapm_vmid:
1077 case snd_soc_dapm_mux:
1078 case snd_soc_dapm_value_mux:
1079 case snd_soc_dapm_output:
1080 case snd_soc_dapm_input:
1081 case snd_soc_dapm_switch:
1082 case snd_soc_dapm_hp:
1083 case snd_soc_dapm_mic:
1084 case snd_soc_dapm_spk:
1085 case snd_soc_dapm_line:
1086 case snd_soc_dapm_micbias:
1087 case snd_soc_dapm_dac:
1088 case snd_soc_dapm_adc:
1089 case snd_soc_dapm_pga:
1090 case snd_soc_dapm_mixer:
1091 case snd_soc_dapm_mixer_named_ctl:
1092 case snd_soc_dapm_supply:
1093 case snd_soc_dapm_aif_in:
1094 case snd_soc_dapm_aif_out:
1096 in = is_connected_input_ep(w);
1097 dapm_clear_walk(w->codec);
1098 out = is_connected_output_ep(w);
1099 dapm_clear_walk(w->codec);
1100 printk("%s: %s in %d out %d\n", w->name,
1101 w->power ? "On":"Off",in, out);
1103 list_for_each_entry(p, &w->sources, list_sink) {
1105 printk(" in %s %s\n", p->name ? p->name : "static",
1108 list_for_each_entry(p, &w->sinks, list_source) {
1110 printk(" out %s %s\n", p->name ? p->name : "static",
1120 #ifdef CONFIG_DEBUG_FS
1121 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1123 file->private_data = inode->i_private;
1127 static ssize_t dapm_widget_power_read_file(struct file *file,
1128 char __user *user_buf,
1129 size_t count, loff_t *ppos)
1131 struct snd_soc_dapm_widget *w = file->private_data;
1135 struct snd_soc_dapm_path *p = NULL;
1137 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1141 in = is_connected_input_ep(w);
1142 dapm_clear_walk(w->codec);
1143 out = is_connected_output_ep(w);
1144 dapm_clear_walk(w->codec);
1146 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d\n",
1147 w->name, w->power ? "On" : "Off", in, out);
1150 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1152 w->active ? "active" : "inactive");
1154 list_for_each_entry(p, &w->sources, list_sink) {
1156 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1158 p->name ? p->name : "static",
1161 list_for_each_entry(p, &w->sinks, list_source) {
1163 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1165 p->name ? p->name : "static",
1169 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1175 static const struct file_operations dapm_widget_power_fops = {
1176 .open = dapm_widget_power_open_file,
1177 .read = dapm_widget_power_read_file,
1180 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1182 struct snd_soc_dapm_widget *w;
1185 if (!codec->debugfs_dapm)
1188 list_for_each_entry(w, &codec->dapm_widgets, list) {
1192 d = debugfs_create_file(w->name, 0444,
1193 codec->debugfs_dapm, w,
1194 &dapm_widget_power_fops);
1197 "ASoC: Failed to create %s debugfs file\n",
1202 void snd_soc_dapm_debugfs_init(struct snd_soc_codec *codec)
1207 /* test and update the power status of a mux widget */
1208 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1209 struct snd_kcontrol *kcontrol, int mask,
1210 int mux, int val, struct soc_enum *e)
1212 struct snd_soc_dapm_path *path;
1215 if (widget->id != snd_soc_dapm_mux &&
1216 widget->id != snd_soc_dapm_value_mux)
1219 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
1222 /* find dapm widget path assoc with kcontrol */
1223 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1224 if (path->kcontrol != kcontrol)
1227 if (!path->name || !e->texts[mux])
1231 /* we now need to match the string in the enum to the path */
1232 if (!(strcmp(path->name, e->texts[mux])))
1233 path->connect = 1; /* new connection */
1235 path->connect = 0; /* old connection must be powered down */
1239 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1240 dump_dapm(widget->codec, "mux power update");
1246 /* test and update the power status of a mux widget */
1247 //copy on 2.6.34 by qjb
1248 static int dapm_mux_update_power_34(struct snd_soc_dapm_widget *widget,
1249 struct snd_kcontrol *kcontrol, int change,
1250 int mux, struct soc_enum *e)
1252 struct snd_soc_dapm_path *path;
1255 if (widget->id != snd_soc_dapm_mux &&
1256 widget->id != snd_soc_dapm_value_mux)
1262 /* find dapm widget path assoc with kcontrol */
1263 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1264 if (path->kcontrol != kcontrol)
1267 if (!path->name || !e->texts[mux])
1271 /* we now need to match the string in the enum to the path */
1272 if (!(strcmp(path->name, e->texts[mux])))
1273 path->connect = 1; /* new connection */
1275 path->connect = 0; /* old connection must be powered down */
1279 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1284 /* test and update the power status of a mixer or switch widget */
1285 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1286 struct snd_kcontrol *kcontrol, int reg,
1287 int val_mask, int val, int invert)
1289 struct snd_soc_dapm_path *path;
1292 if (widget->id != snd_soc_dapm_mixer &&
1293 widget->id != snd_soc_dapm_mixer_named_ctl &&
1294 widget->id != snd_soc_dapm_switch)
1297 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
1300 /* find dapm widget path assoc with kcontrol */
1301 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
1302 if (path->kcontrol != kcontrol)
1305 /* found, now check type */
1308 /* new connection */
1309 path->connect = invert ? 0:1;
1311 /* old connection must be powered down */
1312 path->connect = invert ? 1:0;
1317 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
1318 dump_dapm(widget->codec, "mixer power update");
1324 /* show dapm widget status in sys fs */
1325 static ssize_t dapm_widget_show(struct device *dev,
1326 struct device_attribute *attr, char *buf)
1328 struct snd_soc_device *devdata = dev_get_drvdata(dev);
1329 struct snd_soc_codec *codec = devdata->card->codec;
1330 struct snd_soc_dapm_widget *w;
1332 char *state = "not set";
1334 list_for_each_entry(w, &codec->dapm_widgets, list) {
1336 /* only display widgets that burnm power */
1338 case snd_soc_dapm_hp:
1339 case snd_soc_dapm_mic:
1340 case snd_soc_dapm_spk:
1341 case snd_soc_dapm_line:
1342 case snd_soc_dapm_micbias:
1343 case snd_soc_dapm_dac:
1344 case snd_soc_dapm_adc:
1345 case snd_soc_dapm_pga:
1346 case snd_soc_dapm_mixer:
1347 case snd_soc_dapm_mixer_named_ctl:
1348 case snd_soc_dapm_supply:
1350 count += sprintf(buf + count, "%s: %s\n",
1351 w->name, w->power ? "On":"Off");
1358 switch (codec->bias_level) {
1359 case SND_SOC_BIAS_ON:
1362 case SND_SOC_BIAS_PREPARE:
1365 case SND_SOC_BIAS_STANDBY:
1368 case SND_SOC_BIAS_OFF:
1372 count += sprintf(buf + count, "PM State: %s\n", state);
1377 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1379 int snd_soc_dapm_sys_add(struct device *dev)
1381 return device_create_file(dev, &dev_attr_dapm_widget);
1384 static void snd_soc_dapm_sys_remove(struct device *dev)
1386 device_remove_file(dev, &dev_attr_dapm_widget);
1389 /* free all dapm widgets and resources */
1390 static void dapm_free_widgets(struct snd_soc_codec *codec)
1392 struct snd_soc_dapm_widget *w, *next_w;
1393 struct snd_soc_dapm_path *p, *next_p;
1395 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
1400 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
1402 kfree(p->long_name);
1407 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
1408 const char *pin, int status)
1410 struct snd_soc_dapm_widget *w;
1412 list_for_each_entry(w, &codec->dapm_widgets, list) {
1413 if (!strcmp(w->name, pin)) {
1414 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
1415 w->connected = status;
1420 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
1425 * snd_soc_dapm_sync - scan and power dapm paths
1426 * @codec: audio codec
1428 * Walks all dapm audio paths and powers widgets according to their
1429 * stream or path usage.
1431 * Returns 0 for success.
1433 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
1435 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1436 dump_dapm(codec, "sync");
1439 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1441 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
1442 const char *sink, const char *control, const char *source)
1444 struct snd_soc_dapm_path *path;
1445 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1448 /* find src and dest widgets */
1449 list_for_each_entry(w, &codec->dapm_widgets, list) {
1451 if (!wsink && !(strcmp(w->name, sink))) {
1455 if (!wsource && !(strcmp(w->name, source))) {
1460 if (wsource == NULL || wsink == NULL)
1463 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1467 path->source = wsource;
1469 INIT_LIST_HEAD(&path->list);
1470 INIT_LIST_HEAD(&path->list_source);
1471 INIT_LIST_HEAD(&path->list_sink);
1473 /* check for external widgets */
1474 if (wsink->id == snd_soc_dapm_input) {
1475 if (wsource->id == snd_soc_dapm_micbias ||
1476 wsource->id == snd_soc_dapm_mic ||
1477 wsource->id == snd_soc_dapm_line ||
1478 wsource->id == snd_soc_dapm_output)
1481 if (wsource->id == snd_soc_dapm_output) {
1482 if (wsink->id == snd_soc_dapm_spk ||
1483 wsink->id == snd_soc_dapm_hp ||
1484 wsink->id == snd_soc_dapm_line ||
1485 wsink->id == snd_soc_dapm_input)
1489 /* connect static paths */
1490 if (control == NULL) {
1491 list_add(&path->list, &codec->dapm_paths);
1492 list_add(&path->list_sink, &wsink->sources);
1493 list_add(&path->list_source, &wsource->sinks);
1498 /* connect dynamic paths */
1500 case snd_soc_dapm_adc:
1501 case snd_soc_dapm_dac:
1502 case snd_soc_dapm_pga:
1503 case snd_soc_dapm_input:
1504 case snd_soc_dapm_output:
1505 case snd_soc_dapm_micbias:
1506 case snd_soc_dapm_vmid:
1507 case snd_soc_dapm_pre:
1508 case snd_soc_dapm_post:
1509 case snd_soc_dapm_supply:
1510 case snd_soc_dapm_aif_in:
1511 case snd_soc_dapm_aif_out:
1512 list_add(&path->list, &codec->dapm_paths);
1513 list_add(&path->list_sink, &wsink->sources);
1514 list_add(&path->list_source, &wsource->sinks);
1517 case snd_soc_dapm_mux:
1518 case snd_soc_dapm_value_mux:
1519 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1520 &wsink->kcontrols[0]);
1524 case snd_soc_dapm_switch:
1525 case snd_soc_dapm_mixer:
1526 case snd_soc_dapm_mixer_named_ctl:
1527 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1531 case snd_soc_dapm_hp:
1532 case snd_soc_dapm_mic:
1533 case snd_soc_dapm_line:
1534 case snd_soc_dapm_spk:
1535 list_add(&path->list, &codec->dapm_paths);
1536 list_add(&path->list_sink, &wsink->sources);
1537 list_add(&path->list_source, &wsource->sinks);
1544 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1551 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1553 * @route: audio routes
1554 * @num: number of routes
1556 * Connects 2 dapm widgets together via a named audio path. The sink is
1557 * the widget receiving the audio signal, whilst the source is the sender
1558 * of the audio signal.
1560 * Returns 0 for success else error. On error all resources can be freed
1561 * with a call to snd_soc_card_free().
1563 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1564 const struct snd_soc_dapm_route *route, int num)
1568 for (i = 0; i < num; i++) {
1569 ret = snd_soc_dapm_add_route(codec, route->sink,
1570 route->control, route->source);
1572 printk(KERN_ERR "Failed to add route %s->%s\n",
1582 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1585 * snd_soc_dapm_new_widgets - add new dapm widgets
1586 * @codec: audio codec
1588 * Checks the codec for any new dapm widgets and creates them if found.
1590 * Returns 0 for success.
1592 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1594 struct snd_soc_dapm_widget *w;
1596 list_for_each_entry(w, &codec->dapm_widgets, list)
1602 case snd_soc_dapm_switch:
1603 case snd_soc_dapm_mixer:
1604 case snd_soc_dapm_mixer_named_ctl:
1605 w->power_check = dapm_generic_check_power;
1606 dapm_new_mixer(codec, w);
1608 case snd_soc_dapm_mux:
1609 case snd_soc_dapm_value_mux:
1610 w->power_check = dapm_generic_check_power;
1611 dapm_new_mux(codec, w);
1613 case snd_soc_dapm_adc:
1614 case snd_soc_dapm_aif_out:
1615 w->power_check = dapm_adc_check_power;
1617 case snd_soc_dapm_dac:
1618 case snd_soc_dapm_aif_in:
1619 w->power_check = dapm_dac_check_power;
1621 case snd_soc_dapm_pga:
1622 w->power_check = dapm_generic_check_power;
1623 dapm_new_pga(codec, w);
1625 case snd_soc_dapm_input:
1626 case snd_soc_dapm_output:
1627 case snd_soc_dapm_micbias:
1628 case snd_soc_dapm_spk:
1629 case snd_soc_dapm_hp:
1630 case snd_soc_dapm_mic:
1631 case snd_soc_dapm_line:
1632 w->power_check = dapm_generic_check_power;
1634 case snd_soc_dapm_supply:
1635 w->power_check = dapm_supply_check_power;
1636 case snd_soc_dapm_vmid:
1637 case snd_soc_dapm_pre:
1638 case snd_soc_dapm_post:
1644 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1647 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1650 * snd_soc_dapm_get_volsw - dapm mixer get callback
1651 * @kcontrol: mixer control
1652 * @ucontrol: control element information
1654 * Callback to get the value of a dapm mixer control.
1656 * Returns 0 for success.
1658 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1659 struct snd_ctl_elem_value *ucontrol)
1661 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1662 struct soc_mixer_control *mc =
1663 (struct soc_mixer_control *)kcontrol->private_value;
1664 unsigned int reg = mc->reg;
1665 unsigned int shift = mc->shift;
1666 unsigned int rshift = mc->rshift;
1668 unsigned int invert = mc->invert;
1669 unsigned int mask = (1 << fls(max)) - 1;
1671 /* return the saved value if we are powered down */
1672 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1673 ucontrol->value.integer.value[0] = widget->saved_value;
1677 ucontrol->value.integer.value[0] =
1678 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1679 if (shift != rshift)
1680 ucontrol->value.integer.value[1] =
1681 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1683 ucontrol->value.integer.value[0] =
1684 max - ucontrol->value.integer.value[0];
1685 if (shift != rshift)
1686 ucontrol->value.integer.value[1] =
1687 max - ucontrol->value.integer.value[1];
1692 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1695 * snd_soc_dapm_put_volsw - dapm mixer set callback
1696 * @kcontrol: mixer control
1697 * @ucontrol: control element information
1699 * Callback to set the value of a dapm mixer control.
1701 * Returns 0 for success.
1703 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1704 struct snd_ctl_elem_value *ucontrol)
1706 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1707 struct soc_mixer_control *mc =
1708 (struct soc_mixer_control *)kcontrol->private_value;
1709 unsigned int reg = mc->reg;
1710 unsigned int shift = mc->shift;
1711 unsigned int rshift = mc->rshift;
1713 unsigned int mask = (1 << fls(max)) - 1;
1714 unsigned int invert = mc->invert;
1715 unsigned int val, val2, val_mask;
1718 val = (ucontrol->value.integer.value[0] & mask);
1722 val_mask = mask << shift;
1724 if (shift != rshift) {
1725 val2 = (ucontrol->value.integer.value[1] & mask);
1728 val_mask |= mask << rshift;
1729 val |= val2 << rshift;
1732 mutex_lock(&widget->codec->mutex);
1733 widget->value = val;
1735 /* save volume value if the widget is powered down */
1736 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1737 widget->saved_value = val;
1738 mutex_unlock(&widget->codec->mutex);
1742 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1743 if (widget->event) {
1744 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1745 ret = widget->event(widget, kcontrol,
1746 SND_SOC_DAPM_PRE_REG);
1752 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1753 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1754 ret = widget->event(widget, kcontrol,
1755 SND_SOC_DAPM_POST_REG);
1757 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1760 mutex_unlock(&widget->codec->mutex);
1763 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1766 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1767 * @kcontrol: mixer control
1768 * @ucontrol: control element information
1770 * Callback to get the value of a dapm enumerated double mixer control.
1772 * Returns 0 for success.
1774 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1775 struct snd_ctl_elem_value *ucontrol)
1777 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1778 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1779 unsigned int val, bitmask;
1781 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1783 val = snd_soc_read(widget->codec, e->reg);
1784 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1785 if (e->shift_l != e->shift_r)
1786 ucontrol->value.enumerated.item[1] =
1787 (val >> e->shift_r) & (bitmask - 1);
1791 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1794 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1795 * @kcontrol: mixer control
1796 * @ucontrol: control element information
1798 * Callback to set the value of a dapm enumerated double mixer control.
1800 * Returns 0 for success.
1802 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1803 struct snd_ctl_elem_value *ucontrol)
1805 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1806 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1807 unsigned int val, mux;
1808 unsigned int mask, bitmask;
1811 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1813 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1815 mux = ucontrol->value.enumerated.item[0];
1816 val = mux << e->shift_l;
1817 mask = (bitmask - 1) << e->shift_l;
1818 if (e->shift_l != e->shift_r) {
1819 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1821 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1822 mask |= (bitmask - 1) << e->shift_r;
1825 mutex_lock(&widget->codec->mutex);
1826 widget->value = val;
1827 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1828 if (widget->event) {
1829 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1830 ret = widget->event(widget,
1831 kcontrol, SND_SOC_DAPM_PRE_REG);
1835 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1836 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1837 ret = widget->event(widget,
1838 kcontrol, SND_SOC_DAPM_POST_REG);
1840 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1843 mutex_unlock(&widget->codec->mutex);
1846 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1849 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1850 * @kcontrol: mixer control
1851 * @ucontrol: control element information
1853 * Returns 0 for success.
1855 //copy on 2.6.34 by qjb
1856 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
1857 struct snd_ctl_elem_value *ucontrol)
1859 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1861 ucontrol->value.enumerated.item[0] = widget->value;
1865 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
1868 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1869 * @kcontrol: mixer control
1870 * @ucontrol: control element information
1872 * Returns 0 for success.
1874 //copy on 2.6.34 by qjb
1875 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
1876 struct snd_ctl_elem_value *ucontrol)
1878 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1879 struct soc_enum *e =
1880 (struct soc_enum *)kcontrol->private_value;
1884 if (ucontrol->value.enumerated.item[0] >= e->max)
1887 mutex_lock(&widget->codec->mutex);
1889 change = widget->value != ucontrol->value.enumerated.item[0];
1890 widget->value = ucontrol->value.enumerated.item[0];
1891 dapm_mux_update_power_34(widget, kcontrol, change, widget->value, e);
1893 mutex_unlock(&widget->codec->mutex);
1896 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
1899 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1901 * @kcontrol: mixer control
1902 * @ucontrol: control element information
1904 * Callback to get the value of a dapm semi enumerated double mixer control.
1906 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1907 * used for handling bitfield coded enumeration for example.
1909 * Returns 0 for success.
1911 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1912 struct snd_ctl_elem_value *ucontrol)
1914 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1915 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1916 unsigned int reg_val, val, mux;
1918 reg_val = snd_soc_read(widget->codec, e->reg);
1919 val = (reg_val >> e->shift_l) & e->mask;
1920 for (mux = 0; mux < e->max; mux++) {
1921 if (val == e->values[mux])
1924 ucontrol->value.enumerated.item[0] = mux;
1925 if (e->shift_l != e->shift_r) {
1926 val = (reg_val >> e->shift_r) & e->mask;
1927 for (mux = 0; mux < e->max; mux++) {
1928 if (val == e->values[mux])
1931 ucontrol->value.enumerated.item[1] = mux;
1936 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1939 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1941 * @kcontrol: mixer control
1942 * @ucontrol: control element information
1944 * Callback to set the value of a dapm semi enumerated double mixer control.
1946 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1947 * used for handling bitfield coded enumeration for example.
1949 * Returns 0 for success.
1951 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1952 struct snd_ctl_elem_value *ucontrol)
1954 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1955 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1956 unsigned int val, mux;
1960 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1962 mux = ucontrol->value.enumerated.item[0];
1963 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1964 mask = e->mask << e->shift_l;
1965 if (e->shift_l != e->shift_r) {
1966 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1968 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1969 mask |= e->mask << e->shift_r;
1972 mutex_lock(&widget->codec->mutex);
1973 widget->value = val;
1974 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1975 if (widget->event) {
1976 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1977 ret = widget->event(widget,
1978 kcontrol, SND_SOC_DAPM_PRE_REG);
1982 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1983 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1984 ret = widget->event(widget,
1985 kcontrol, SND_SOC_DAPM_POST_REG);
1987 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1990 mutex_unlock(&widget->codec->mutex);
1993 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1996 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1998 * @kcontrol: mixer control
1999 * @uinfo: control element information
2001 * Callback to provide information about a pin switch control.
2003 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2004 struct snd_ctl_elem_info *uinfo)
2006 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2008 uinfo->value.integer.min = 0;
2009 uinfo->value.integer.max = 1;
2013 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2016 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2018 * @kcontrol: mixer control
2021 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2022 struct snd_ctl_elem_value *ucontrol)
2024 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2025 const char *pin = (const char *)kcontrol->private_value;
2027 mutex_lock(&codec->mutex);
2029 ucontrol->value.integer.value[0] =
2030 snd_soc_dapm_get_pin_status(codec, pin);
2032 mutex_unlock(&codec->mutex);
2036 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2039 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2041 * @kcontrol: mixer control
2044 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2045 struct snd_ctl_elem_value *ucontrol)
2047 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2048 const char *pin = (const char *)kcontrol->private_value;
2050 mutex_lock(&codec->mutex);
2052 if (ucontrol->value.integer.value[0])
2053 snd_soc_dapm_enable_pin(codec, pin);
2055 snd_soc_dapm_disable_pin(codec, pin);
2057 snd_soc_dapm_sync(codec);
2059 mutex_unlock(&codec->mutex);
2063 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2066 * snd_soc_dapm_new_control - create new dapm control
2067 * @codec: audio codec
2068 * @widget: widget template
2070 * Creates a new dapm control based upon the template.
2072 * Returns 0 for success else error.
2074 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
2075 const struct snd_soc_dapm_widget *widget)
2077 struct snd_soc_dapm_widget *w;
2079 if ((w = dapm_cnew_widget(widget)) == NULL)
2083 INIT_LIST_HEAD(&w->sources);
2084 INIT_LIST_HEAD(&w->sinks);
2085 INIT_LIST_HEAD(&w->list);
2086 list_add(&w->list, &codec->dapm_widgets);
2088 /* machine layer set ups unconnected pins and insertions */
2092 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2095 * snd_soc_dapm_new_controls - create new dapm controls
2096 * @codec: audio codec
2097 * @widget: widget array
2098 * @num: number of widgets
2100 * Creates new DAPM controls based upon the templates.
2102 * Returns 0 for success else error.
2104 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
2105 const struct snd_soc_dapm_widget *widget,
2110 for (i = 0; i < num; i++) {
2111 ret = snd_soc_dapm_new_control(codec, widget);
2114 "ASoC: Failed to create DAPM control %s: %d\n",
2122 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2126 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2127 * @codec: audio codec
2128 * @stream: stream name
2129 * @event: stream event
2131 * Sends a stream event to the dapm core. The core then makes any
2132 * necessary widget power changes.
2134 * Returns 0 for success else error.
2136 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
2137 char *stream, int event)
2139 struct snd_soc_dapm_widget *w;
2144 mutex_lock(&codec->mutex);
2145 list_for_each_entry(w, &codec->dapm_widgets, list)
2149 pr_debug("widget %s\n %s stream %s event %d\n",
2150 w->name, w->sname, stream, event);
2151 if (strstr(w->sname, stream)) {
2153 case SND_SOC_DAPM_STREAM_START:
2156 case SND_SOC_DAPM_STREAM_STOP:
2159 case SND_SOC_DAPM_STREAM_SUSPEND:
2164 case SND_SOC_DAPM_STREAM_RESUME:
2170 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2172 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2178 dapm_power_widgets(codec, event);
2179 mutex_unlock(&codec->mutex);
2180 dump_dapm(codec, __func__);
2183 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2186 * snd_soc_dapm_enable_pin - enable pin.
2190 * Enables input/output pin and its parents or children widgets iff there is
2191 * a valid audio route and active audio stream.
2192 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2193 * do any widget power switching.
2195 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
2197 return snd_soc_dapm_set_pin(codec, pin, 1);
2199 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2202 * snd_soc_dapm_disable_pin - disable pin.
2206 * Disables input/output pin and its parents or children widgets.
2207 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2208 * do any widget power switching.
2210 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
2212 return snd_soc_dapm_set_pin(codec, pin, 0);
2214 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2217 * snd_soc_dapm_nc_pin - permanently disable pin.
2221 * Marks the specified pin as being not connected, disabling it along
2222 * any parent or child widgets. At present this is identical to
2223 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2224 * additional things such as disabling controls which only affect
2225 * paths through the pin.
2227 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2228 * do any widget power switching.
2230 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
2232 return snd_soc_dapm_set_pin(codec, pin, 0);
2234 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2237 * snd_soc_dapm_get_pin_status - get audio pin status
2238 * @codec: audio codec
2239 * @pin: audio signal pin endpoint (or start point)
2241 * Get audio pin status - connected or disconnected.
2243 * Returns 1 for connected otherwise 0.
2245 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
2247 struct snd_soc_dapm_widget *w;
2249 list_for_each_entry(w, &codec->dapm_widgets, list) {
2250 if (!strcmp(w->name, pin))
2251 return w->connected;
2256 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2259 * snd_soc_dapm_free - free dapm resources
2260 * @socdev: SoC device
2262 * Free all dapm widgets and resources.
2264 void snd_soc_dapm_free(struct snd_soc_device *socdev)
2266 struct snd_soc_codec *codec = socdev->card->codec;
2268 snd_soc_dapm_sys_remove(socdev->dev);
2269 dapm_free_widgets(codec);
2271 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2274 * snd_soc_dapm_shutdown - callback for system shutdown
2276 void snd_soc_dapm_shutdown(struct snd_soc_device *socdev)
2278 struct snd_soc_codec *codec = socdev->card->codec;
2279 struct snd_soc_dapm_widget *w;
2280 LIST_HEAD(down_list);
2283 list_for_each_entry(w, &codec->dapm_widgets, list) {
2285 dapm_seq_insert(w, &down_list, dapm_down_seq);
2291 /* If there were no widgets to power down we're already in
2295 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE);
2296 dapm_seq_run(codec, &down_list, 0, dapm_down_seq);
2297 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY);
2300 snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF);
2303 /* Module information */
2304 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2305 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2306 MODULE_LICENSE("GPL");