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 <linux/slab.h>
42 #include <sound/core.h>
43 #include <sound/pcm.h>
44 #include <sound/pcm_params.h>
45 #include <sound/soc.h>
46 #include <sound/initval.h>
48 #include <trace/events/asoc.h>
50 /* dapm power sequences - make this per codec in the future */
51 static int dapm_up_seq[] = {
52 [snd_soc_dapm_pre] = 0,
53 [snd_soc_dapm_supply] = 1,
54 [snd_soc_dapm_micbias] = 2,
55 [snd_soc_dapm_aif_in] = 3,
56 [snd_soc_dapm_aif_out] = 3,
57 [snd_soc_dapm_mic] = 4,
58 [snd_soc_dapm_mux] = 5,
59 [snd_soc_dapm_virt_mux] = 5,
60 [snd_soc_dapm_value_mux] = 5,
61 [snd_soc_dapm_dac] = 6,
62 [snd_soc_dapm_mixer] = 7,
63 [snd_soc_dapm_mixer_named_ctl] = 7,
64 [snd_soc_dapm_pga] = 8,
65 [snd_soc_dapm_adc] = 9,
66 [snd_soc_dapm_out_drv] = 10,
67 [snd_soc_dapm_hp] = 10,
68 [snd_soc_dapm_spk] = 10,
69 [snd_soc_dapm_post] = 11,
72 static int dapm_down_seq[] = {
73 [snd_soc_dapm_pre] = 0,
74 [snd_soc_dapm_adc] = 1,
75 [snd_soc_dapm_hp] = 2,
76 [snd_soc_dapm_spk] = 2,
77 [snd_soc_dapm_out_drv] = 2,
78 [snd_soc_dapm_pga] = 4,
79 [snd_soc_dapm_mixer_named_ctl] = 5,
80 [snd_soc_dapm_mixer] = 5,
81 [snd_soc_dapm_dac] = 6,
82 [snd_soc_dapm_mic] = 7,
83 [snd_soc_dapm_micbias] = 8,
84 [snd_soc_dapm_mux] = 9,
85 [snd_soc_dapm_virt_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(struct device *dev, u32 pop_time, const char *fmt, ...)
107 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
112 vsnprintf(buf, PAGE_SIZE, fmt, args);
113 dev_info(dev, "%s", buf);
119 /* create a new dapm widget */
120 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
121 const struct snd_soc_dapm_widget *_widget)
123 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
127 * snd_soc_dapm_set_bias_level - set the bias level for the system
128 * @card: audio device
129 * @level: level to configure
131 * Configure the bias (power) levels for the SoC audio device.
133 * Returns 0 for success else error.
135 static int snd_soc_dapm_set_bias_level(struct snd_soc_card *card,
136 struct snd_soc_dapm_context *dapm,
137 enum snd_soc_bias_level level)
142 case SND_SOC_BIAS_ON:
143 dev_dbg(dapm->dev, "Setting full bias\n");
145 case SND_SOC_BIAS_PREPARE:
146 dev_dbg(dapm->dev, "Setting bias prepare\n");
148 case SND_SOC_BIAS_STANDBY:
149 dev_dbg(dapm->dev, "Setting standby bias\n");
151 case SND_SOC_BIAS_OFF:
152 dev_dbg(dapm->dev, "Setting bias off\n");
155 dev_err(dapm->dev, "Setting invalid bias %d\n", level);
159 trace_snd_soc_bias_level_start(card, level);
161 if (card && card->set_bias_level)
162 ret = card->set_bias_level(card, level);
164 if (dapm->codec && dapm->codec->driver->set_bias_level)
165 ret = dapm->codec->driver->set_bias_level(dapm->codec, level);
167 dapm->bias_level = level;
170 if (card && card->set_bias_level_post)
171 ret = card->set_bias_level_post(card, level);
174 trace_snd_soc_bias_level_done(card, level);
179 /* set up initial codec paths */
180 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
181 struct snd_soc_dapm_path *p, int i)
184 case snd_soc_dapm_switch:
185 case snd_soc_dapm_mixer:
186 case snd_soc_dapm_mixer_named_ctl: {
188 struct soc_mixer_control *mc = (struct soc_mixer_control *)
189 w->kcontrols[i].private_value;
190 unsigned int reg = mc->reg;
191 unsigned int shift = mc->shift;
193 unsigned int mask = (1 << fls(max)) - 1;
194 unsigned int invert = mc->invert;
196 val = snd_soc_read(w->codec, reg);
197 val = (val >> shift) & mask;
199 if ((invert && !val) || (!invert && val))
205 case snd_soc_dapm_mux: {
206 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
207 int val, item, bitmask;
209 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
211 val = snd_soc_read(w->codec, e->reg);
212 item = (val >> e->shift_l) & (bitmask - 1);
215 for (i = 0; i < e->max; i++) {
216 if (!(strcmp(p->name, e->texts[i])) && item == i)
221 case snd_soc_dapm_virt_mux: {
222 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
225 /* since a virtual mux has no backing registers to
226 * decide which path to connect, it will try to match
227 * with the first enumeration. This is to ensure
228 * that the default mux choice (the first) will be
229 * correctly powered up during initialization.
231 if (!strcmp(p->name, e->texts[0]))
235 case snd_soc_dapm_value_mux: {
236 struct soc_enum *e = (struct soc_enum *)
237 w->kcontrols[i].private_value;
240 val = snd_soc_read(w->codec, e->reg);
241 val = (val >> e->shift_l) & e->mask;
242 for (item = 0; item < e->max; item++) {
243 if (val == e->values[item])
248 for (i = 0; i < e->max; i++) {
249 if (!(strcmp(p->name, e->texts[i])) && item == i)
254 /* does not effect routing - always connected */
255 case snd_soc_dapm_pga:
256 case snd_soc_dapm_out_drv:
257 case snd_soc_dapm_output:
258 case snd_soc_dapm_adc:
259 case snd_soc_dapm_input:
260 case snd_soc_dapm_dac:
261 case snd_soc_dapm_micbias:
262 case snd_soc_dapm_vmid:
263 case snd_soc_dapm_supply:
264 case snd_soc_dapm_aif_in:
265 case snd_soc_dapm_aif_out:
268 /* does effect routing - dynamically connected */
269 case snd_soc_dapm_hp:
270 case snd_soc_dapm_mic:
271 case snd_soc_dapm_spk:
272 case snd_soc_dapm_line:
273 case snd_soc_dapm_pre:
274 case snd_soc_dapm_post:
280 /* connect mux widget to its interconnecting audio paths */
281 static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
282 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
283 struct snd_soc_dapm_path *path, const char *control_name,
284 const struct snd_kcontrol_new *kcontrol)
286 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
289 for (i = 0; i < e->max; i++) {
290 if (!(strcmp(control_name, e->texts[i]))) {
291 list_add(&path->list, &dapm->card->paths);
292 list_add(&path->list_sink, &dest->sources);
293 list_add(&path->list_source, &src->sinks);
294 path->name = (char*)e->texts[i];
295 dapm_set_path_status(dest, path, 0);
303 /* connect mixer widget to its interconnecting audio paths */
304 static int dapm_connect_mixer(struct snd_soc_dapm_context *dapm,
305 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
306 struct snd_soc_dapm_path *path, const char *control_name)
310 /* search for mixer kcontrol */
311 for (i = 0; i < dest->num_kcontrols; i++) {
312 if (!strcmp(control_name, dest->kcontrols[i].name)) {
313 list_add(&path->list, &dapm->card->paths);
314 list_add(&path->list_sink, &dest->sources);
315 list_add(&path->list_source, &src->sinks);
316 path->name = dest->kcontrols[i].name;
317 dapm_set_path_status(dest, path, i);
324 /* update dapm codec register bits */
325 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
328 unsigned int old, new;
329 struct snd_soc_codec *codec = widget->codec;
330 struct snd_soc_dapm_context *dapm = widget->dapm;
331 struct snd_soc_card *card = dapm->card;
333 /* check for valid widgets */
334 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
335 widget->id == snd_soc_dapm_output ||
336 widget->id == snd_soc_dapm_hp ||
337 widget->id == snd_soc_dapm_mic ||
338 widget->id == snd_soc_dapm_line ||
339 widget->id == snd_soc_dapm_spk)
342 power = widget->power;
344 power = (power ? 0:1);
346 old = snd_soc_read(codec, widget->reg);
347 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
351 pop_dbg(dapm->dev, card->pop_time,
352 "pop test %s : %s in %d ms\n",
353 widget->name, widget->power ? "on" : "off",
355 pop_wait(card->pop_time);
356 snd_soc_write(codec, widget->reg, new);
358 dev_dbg(dapm->dev, "reg %x old %x new %x change %d\n", widget->reg,
363 /* create new dapm mixer control */
364 static int dapm_new_mixer(struct snd_soc_dapm_context *dapm,
365 struct snd_soc_dapm_widget *w)
369 struct snd_soc_dapm_path *path;
370 struct snd_card *card = dapm->codec->card->snd_card;
373 for (i = 0; i < w->num_kcontrols; i++) {
376 list_for_each_entry(path, &w->sources, list_sink) {
378 /* mixer/mux paths name must match control name */
379 if (path->name != (char*)w->kcontrols[i].name)
382 /* add dapm control with long name.
383 * for dapm_mixer this is the concatenation of the
384 * mixer and kcontrol name.
385 * for dapm_mixer_named_ctl this is simply the
388 name_len = strlen(w->kcontrols[i].name) + 1;
389 if (w->id != snd_soc_dapm_mixer_named_ctl)
390 name_len += 1 + strlen(w->name);
392 path->long_name = kmalloc(name_len, GFP_KERNEL);
394 if (path->long_name == NULL)
399 snprintf(path->long_name, name_len, "%s %s",
400 w->name, w->kcontrols[i].name);
402 case snd_soc_dapm_mixer_named_ctl:
403 snprintf(path->long_name, name_len, "%s",
404 w->kcontrols[i].name);
408 path->long_name[name_len - 1] = '\0';
410 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
412 ret = snd_ctl_add(card, path->kcontrol);
415 "asoc: failed to add dapm kcontrol %s: %d\n",
416 path->long_name, ret);
417 kfree(path->long_name);
418 path->long_name = NULL;
426 /* create new dapm mux control */
427 static int dapm_new_mux(struct snd_soc_dapm_context *dapm,
428 struct snd_soc_dapm_widget *w)
430 struct snd_soc_dapm_path *path = NULL;
431 struct snd_kcontrol *kcontrol;
432 struct snd_card *card = dapm->codec->card->snd_card;
435 if (!w->num_kcontrols) {
436 dev_err(dapm->dev, "asoc: mux %s has no controls\n", w->name);
440 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
441 ret = snd_ctl_add(card, kcontrol);
446 list_for_each_entry(path, &w->sources, list_sink)
447 path->kcontrol = kcontrol;
452 dev_err(dapm->dev, "asoc: failed to add kcontrol %s\n", w->name);
456 /* create new dapm volume control */
457 static int dapm_new_pga(struct snd_soc_dapm_context *dapm,
458 struct snd_soc_dapm_widget *w)
460 if (w->num_kcontrols)
461 dev_err(w->dapm->dev,
462 "asoc: PGA controls not supported: '%s'\n", w->name);
467 /* reset 'walked' bit for each dapm path */
468 static inline void dapm_clear_walk(struct snd_soc_dapm_context *dapm)
470 struct snd_soc_dapm_path *p;
472 list_for_each_entry(p, &dapm->card->paths, list)
476 /* We implement power down on suspend by checking the power state of
477 * the ALSA card - when we are suspending the ALSA state for the card
480 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget *widget)
482 int level = snd_power_get_state(widget->dapm->codec->card->snd_card);
485 case SNDRV_CTL_POWER_D3hot:
486 case SNDRV_CTL_POWER_D3cold:
487 if (widget->ignore_suspend)
488 dev_dbg(widget->dapm->dev, "%s ignoring suspend\n",
490 return widget->ignore_suspend;
497 * Recursively check for a completed path to an active or physically connected
498 * output widget. Returns number of complete paths.
500 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
502 struct snd_soc_dapm_path *path;
505 if (widget->id == snd_soc_dapm_supply)
508 switch (widget->id) {
509 case snd_soc_dapm_adc:
510 case snd_soc_dapm_aif_out:
512 return snd_soc_dapm_suspend_check(widget);
517 if (widget->connected) {
518 /* connected pin ? */
519 if (widget->id == snd_soc_dapm_output && !widget->ext)
520 return snd_soc_dapm_suspend_check(widget);
522 /* connected jack or spk ? */
523 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
524 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sources)))
525 return snd_soc_dapm_suspend_check(widget);
528 list_for_each_entry(path, &widget->sinks, list_source) {
532 if (path->sink && path->connect) {
534 con += is_connected_output_ep(path->sink);
542 * Recursively check for a completed path to an active or physically connected
543 * input widget. Returns number of complete paths.
545 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
547 struct snd_soc_dapm_path *path;
550 if (widget->id == snd_soc_dapm_supply)
553 /* active stream ? */
554 switch (widget->id) {
555 case snd_soc_dapm_dac:
556 case snd_soc_dapm_aif_in:
558 return snd_soc_dapm_suspend_check(widget);
563 if (widget->connected) {
564 /* connected pin ? */
565 if (widget->id == snd_soc_dapm_input && !widget->ext)
566 return snd_soc_dapm_suspend_check(widget);
568 /* connected VMID/Bias for lower pops */
569 if (widget->id == snd_soc_dapm_vmid)
570 return snd_soc_dapm_suspend_check(widget);
572 /* connected jack ? */
573 if (widget->id == snd_soc_dapm_mic ||
574 (widget->id == snd_soc_dapm_line && !list_empty(&widget->sinks)))
575 return snd_soc_dapm_suspend_check(widget);
578 list_for_each_entry(path, &widget->sources, list_sink) {
582 if (path->source && path->connect) {
584 con += is_connected_input_ep(path->source);
592 * Handler for generic register modifier widget.
594 int dapm_reg_event(struct snd_soc_dapm_widget *w,
595 struct snd_kcontrol *kcontrol, int event)
599 if (SND_SOC_DAPM_EVENT_ON(event))
604 snd_soc_update_bits(w->codec, -(w->reg + 1),
605 w->mask << w->shift, val << w->shift);
609 EXPORT_SYMBOL_GPL(dapm_reg_event);
611 /* Standard power change method, used to apply power changes to most
614 static int dapm_generic_apply_power(struct snd_soc_dapm_widget *w)
618 /* call any power change event handlers */
620 dev_dbg(w->dapm->dev, "power %s event for %s flags %x\n",
621 w->power ? "on" : "off",
622 w->name, w->event_flags);
624 /* power up pre event */
625 if (w->power && w->event &&
626 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
627 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
632 /* power down pre event */
633 if (!w->power && w->event &&
634 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
635 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
642 /* power up post event */
643 if (w->power && w->event &&
644 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
646 NULL, SND_SOC_DAPM_POST_PMU);
651 /* power down post event */
652 if (!w->power && w->event &&
653 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
654 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
662 /* Generic check to see if a widget should be powered.
664 static int dapm_generic_check_power(struct snd_soc_dapm_widget *w)
668 in = is_connected_input_ep(w);
669 dapm_clear_walk(w->dapm);
670 out = is_connected_output_ep(w);
671 dapm_clear_walk(w->dapm);
672 return out != 0 && in != 0;
675 /* Check to see if an ADC has power */
676 static int dapm_adc_check_power(struct snd_soc_dapm_widget *w)
681 in = is_connected_input_ep(w);
682 dapm_clear_walk(w->dapm);
685 return dapm_generic_check_power(w);
689 /* Check to see if a DAC has power */
690 static int dapm_dac_check_power(struct snd_soc_dapm_widget *w)
695 out = is_connected_output_ep(w);
696 dapm_clear_walk(w->dapm);
699 return dapm_generic_check_power(w);
703 /* Check to see if a power supply is needed */
704 static int dapm_supply_check_power(struct snd_soc_dapm_widget *w)
706 struct snd_soc_dapm_path *path;
709 /* Check if one of our outputs is connected */
710 list_for_each_entry(path, &w->sinks, list_source) {
711 if (path->connected &&
712 !path->connected(path->source, path->sink))
715 if (path->sink && path->sink->power_check &&
716 path->sink->power_check(path->sink)) {
722 dapm_clear_walk(w->dapm);
727 static int dapm_seq_compare(struct snd_soc_dapm_widget *a,
728 struct snd_soc_dapm_widget *b,
731 if (sort[a->id] != sort[b->id])
732 return sort[a->id] - sort[b->id];
733 if (a->reg != b->reg)
734 return a->reg - b->reg;
735 if (a->dapm != b->dapm)
736 return (unsigned long)a->dapm - (unsigned long)b->dapm;
741 /* Insert a widget in order into a DAPM power sequence. */
742 static void dapm_seq_insert(struct snd_soc_dapm_widget *new_widget,
743 struct list_head *list,
746 struct snd_soc_dapm_widget *w;
748 list_for_each_entry(w, list, power_list)
749 if (dapm_seq_compare(new_widget, w, sort) < 0) {
750 list_add_tail(&new_widget->power_list, &w->power_list);
754 list_add_tail(&new_widget->power_list, list);
757 static void dapm_seq_check_event(struct snd_soc_dapm_context *dapm,
758 struct snd_soc_dapm_widget *w, int event)
760 struct snd_soc_card *card = dapm->card;
765 case SND_SOC_DAPM_PRE_PMU:
769 case SND_SOC_DAPM_POST_PMU:
770 ev_name = "POST_PMU";
773 case SND_SOC_DAPM_PRE_PMD:
777 case SND_SOC_DAPM_POST_PMD:
778 ev_name = "POST_PMD";
786 if (w->power != power)
789 if (w->event && (w->event_flags & event)) {
790 pop_dbg(dapm->dev, card->pop_time, "pop test : %s %s\n",
792 trace_snd_soc_dapm_widget_event_start(w, event);
793 ret = w->event(w, NULL, event);
794 trace_snd_soc_dapm_widget_event_done(w, event);
796 pr_err("%s: %s event failed: %d\n",
797 ev_name, w->name, ret);
801 /* Apply the coalesced changes from a DAPM sequence */
802 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context *dapm,
803 struct list_head *pending)
805 struct snd_soc_card *card = dapm->card;
806 struct snd_soc_dapm_widget *w;
808 unsigned int value = 0;
809 unsigned int mask = 0;
810 unsigned int cur_mask;
812 reg = list_first_entry(pending, struct snd_soc_dapm_widget,
815 list_for_each_entry(w, pending, power_list) {
816 cur_mask = 1 << w->shift;
817 BUG_ON(reg != w->reg);
828 pop_dbg(dapm->dev, card->pop_time,
829 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
830 w->name, reg, value, mask);
832 /* Check for events */
833 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMU);
834 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_PRE_PMD);
838 pop_dbg(dapm->dev, card->pop_time,
839 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
840 value, mask, reg, card->pop_time);
841 pop_wait(card->pop_time);
842 snd_soc_update_bits(dapm->codec, reg, mask, value);
845 list_for_each_entry(w, pending, power_list) {
846 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMU);
847 dapm_seq_check_event(dapm, w, SND_SOC_DAPM_POST_PMD);
851 /* Apply a DAPM power sequence.
853 * We walk over a pre-sorted list of widgets to apply power to. In
854 * order to minimise the number of writes to the device required
855 * multiple widgets will be updated in a single write where possible.
856 * Currently anything that requires more than a single write is not
859 static void dapm_seq_run(struct snd_soc_dapm_context *dapm,
860 struct list_head *list, int event, int sort[])
862 struct snd_soc_dapm_widget *w, *n;
865 int cur_reg = SND_SOC_NOPM;
866 struct snd_soc_dapm_context *cur_dapm = NULL;
869 list_for_each_entry_safe(w, n, list, power_list) {
872 /* Do we need to apply any queued changes? */
873 if (sort[w->id] != cur_sort || w->reg != cur_reg ||
874 w->dapm != cur_dapm) {
875 if (!list_empty(&pending))
876 dapm_seq_run_coalesced(cur_dapm, &pending);
878 INIT_LIST_HEAD(&pending);
880 cur_reg = SND_SOC_NOPM;
885 case snd_soc_dapm_pre:
887 list_for_each_entry_safe_continue(w, n, list,
890 if (event == SND_SOC_DAPM_STREAM_START)
892 NULL, SND_SOC_DAPM_PRE_PMU);
893 else if (event == SND_SOC_DAPM_STREAM_STOP)
895 NULL, SND_SOC_DAPM_PRE_PMD);
898 case snd_soc_dapm_post:
900 list_for_each_entry_safe_continue(w, n, list,
903 if (event == SND_SOC_DAPM_STREAM_START)
905 NULL, SND_SOC_DAPM_POST_PMU);
906 else if (event == SND_SOC_DAPM_STREAM_STOP)
908 NULL, SND_SOC_DAPM_POST_PMD);
911 case snd_soc_dapm_input:
912 case snd_soc_dapm_output:
913 case snd_soc_dapm_hp:
914 case snd_soc_dapm_mic:
915 case snd_soc_dapm_line:
916 case snd_soc_dapm_spk:
917 /* No register support currently */
918 ret = dapm_generic_apply_power(w);
922 /* Queue it up for application */
923 cur_sort = sort[w->id];
926 list_move(&w->power_list, &pending);
931 dev_err(w->dapm->dev,
932 "Failed to apply widget power: %d\n", ret);
935 if (!list_empty(&pending))
936 dapm_seq_run_coalesced(dapm, &pending);
939 static void dapm_widget_update(struct snd_soc_dapm_context *dapm)
941 struct snd_soc_dapm_update *update = dapm->update;
942 struct snd_soc_dapm_widget *w;
951 (w->event_flags & SND_SOC_DAPM_PRE_REG)) {
952 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_PRE_REG);
954 pr_err("%s DAPM pre-event failed: %d\n",
958 ret = snd_soc_update_bits(w->codec, update->reg, update->mask,
961 pr_err("%s DAPM update failed: %d\n", w->name, ret);
964 (w->event_flags & SND_SOC_DAPM_POST_REG)) {
965 ret = w->event(w, update->kcontrol, SND_SOC_DAPM_POST_REG);
967 pr_err("%s DAPM post-event failed: %d\n",
975 * Scan each dapm widget for complete audio path.
976 * A complete path is a route that has valid endpoints i.e.:-
978 * o DAC to output pin.
979 * o Input Pin to ADC.
980 * o Input pin to Output pin (bypass, sidetone)
981 * o DAC to ADC (loopback).
983 static int dapm_power_widgets(struct snd_soc_dapm_context *dapm, int event)
985 struct snd_soc_card *card = dapm->codec->card;
986 struct snd_soc_dapm_widget *w;
987 struct snd_soc_dapm_context *d;
989 LIST_HEAD(down_list);
993 trace_snd_soc_dapm_start(card);
995 list_for_each_entry(d, &card->dapm_list, list)
999 /* Check which widgets we need to power and store them in
1000 * lists indicating if they should be powered up or down.
1002 list_for_each_entry(w, &card->widgets, list) {
1004 case snd_soc_dapm_pre:
1005 dapm_seq_insert(w, &down_list, dapm_down_seq);
1007 case snd_soc_dapm_post:
1008 dapm_seq_insert(w, &up_list, dapm_up_seq);
1012 if (!w->power_check)
1016 power = w->power_check(w);
1020 w->dapm->dev_power = 1;
1022 if (w->power == power)
1025 trace_snd_soc_dapm_widget_power(w, power);
1028 dapm_seq_insert(w, &up_list, dapm_up_seq);
1030 dapm_seq_insert(w, &down_list, dapm_down_seq);
1037 /* If there are no DAPM widgets then try to figure out power from the
1040 if (!dapm->n_widgets) {
1042 case SND_SOC_DAPM_STREAM_START:
1043 case SND_SOC_DAPM_STREAM_RESUME:
1044 dapm->dev_power = 1;
1046 case SND_SOC_DAPM_STREAM_STOP:
1047 dapm->dev_power = !!dapm->codec->active;
1049 case SND_SOC_DAPM_STREAM_SUSPEND:
1050 dapm->dev_power = 0;
1052 case SND_SOC_DAPM_STREAM_NOP:
1053 switch (dapm->bias_level) {
1054 case SND_SOC_BIAS_STANDBY:
1055 case SND_SOC_BIAS_OFF:
1056 dapm->dev_power = 0;
1059 dapm->dev_power = 1;
1068 list_for_each_entry(d, &dapm->card->dapm_list, list) {
1069 if (d->dev_power && d->bias_level == SND_SOC_BIAS_OFF) {
1070 ret = snd_soc_dapm_set_bias_level(card, d,
1071 SND_SOC_BIAS_STANDBY);
1074 "Failed to turn on bias: %d\n", ret);
1077 /* If we're changing to all on or all off then prepare */
1078 if ((d->dev_power && d->bias_level == SND_SOC_BIAS_STANDBY) ||
1079 (!d->dev_power && d->bias_level == SND_SOC_BIAS_ON)) {
1080 ret = snd_soc_dapm_set_bias_level(card, d,
1081 SND_SOC_BIAS_PREPARE);
1084 "Failed to prepare bias: %d\n", ret);
1088 /* Power down widgets first; try to avoid amplifying pops. */
1089 dapm_seq_run(dapm, &down_list, event, dapm_down_seq);
1091 dapm_widget_update(dapm);
1094 dapm_seq_run(dapm, &up_list, event, dapm_up_seq);
1096 list_for_each_entry(d, &dapm->card->dapm_list, list) {
1097 /* If we just powered the last thing off drop to standby bias */
1098 if (d->bias_level == SND_SOC_BIAS_PREPARE && !d->dev_power) {
1099 ret = snd_soc_dapm_set_bias_level(card, d,
1100 SND_SOC_BIAS_STANDBY);
1103 "Failed to apply standby bias: %d\n",
1107 /* If we're in standby and can support bias off then do that */
1108 if (d->bias_level == SND_SOC_BIAS_STANDBY &&
1110 ret = snd_soc_dapm_set_bias_level(card, d,
1114 "Failed to turn off bias: %d\n", ret);
1117 /* If we just powered up then move to active bias */
1118 if (d->bias_level == SND_SOC_BIAS_PREPARE && d->dev_power) {
1119 ret = snd_soc_dapm_set_bias_level(card, d,
1123 "Failed to apply active bias: %d\n",
1128 pop_dbg(dapm->dev, card->pop_time,
1129 "DAPM sequencing finished, waiting %dms\n", card->pop_time);
1130 pop_wait(card->pop_time);
1132 trace_snd_soc_dapm_done(card);
1137 #ifdef CONFIG_DEBUG_FS
1138 static int dapm_widget_power_open_file(struct inode *inode, struct file *file)
1140 file->private_data = inode->i_private;
1144 static ssize_t dapm_widget_power_read_file(struct file *file,
1145 char __user *user_buf,
1146 size_t count, loff_t *ppos)
1148 struct snd_soc_dapm_widget *w = file->private_data;
1152 struct snd_soc_dapm_path *p = NULL;
1154 buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
1158 in = is_connected_input_ep(w);
1159 dapm_clear_walk(w->dapm);
1160 out = is_connected_output_ep(w);
1161 dapm_clear_walk(w->dapm);
1163 ret = snprintf(buf, PAGE_SIZE, "%s: %s in %d out %d",
1164 w->name, w->power ? "On" : "Off", in, out);
1167 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1168 " - R%d(0x%x) bit %d",
1169 w->reg, w->reg, w->shift);
1171 ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
1174 ret += snprintf(buf + ret, PAGE_SIZE - ret, " stream %s %s\n",
1176 w->active ? "active" : "inactive");
1178 list_for_each_entry(p, &w->sources, list_sink) {
1179 if (p->connected && !p->connected(w, p->sink))
1183 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1185 p->name ? p->name : "static",
1188 list_for_each_entry(p, &w->sinks, list_source) {
1189 if (p->connected && !p->connected(w, p->sink))
1193 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1195 p->name ? p->name : "static",
1199 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
1205 static const struct file_operations dapm_widget_power_fops = {
1206 .open = dapm_widget_power_open_file,
1207 .read = dapm_widget_power_read_file,
1208 .llseek = default_llseek,
1211 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm)
1213 struct snd_soc_dapm_widget *w;
1216 if (!dapm->debugfs_dapm)
1219 list_for_each_entry(w, &dapm->card->widgets, list) {
1220 if (!w->name || w->dapm != dapm)
1223 d = debugfs_create_file(w->name, 0444,
1224 dapm->debugfs_dapm, w,
1225 &dapm_widget_power_fops);
1227 dev_warn(w->dapm->dev,
1228 "ASoC: Failed to create %s debugfs file\n",
1233 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm)
1238 /* test and update the power status of a mux widget */
1239 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
1240 struct snd_kcontrol *kcontrol, int change,
1241 int mux, struct soc_enum *e)
1243 struct snd_soc_dapm_path *path;
1246 if (widget->id != snd_soc_dapm_mux &&
1247 widget->id != snd_soc_dapm_virt_mux &&
1248 widget->id != snd_soc_dapm_value_mux)
1254 /* find dapm widget path assoc with kcontrol */
1255 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1256 if (path->kcontrol != kcontrol)
1259 if (!path->name || !e->texts[mux])
1263 /* we now need to match the string in the enum to the path */
1264 if (!(strcmp(path->name, e->texts[mux])))
1265 path->connect = 1; /* new connection */
1267 path->connect = 0; /* old connection must be powered down */
1271 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1276 /* test and update the power status of a mixer or switch widget */
1277 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
1278 struct snd_kcontrol *kcontrol, int connect)
1280 struct snd_soc_dapm_path *path;
1283 if (widget->id != snd_soc_dapm_mixer &&
1284 widget->id != snd_soc_dapm_mixer_named_ctl &&
1285 widget->id != snd_soc_dapm_switch)
1288 /* find dapm widget path assoc with kcontrol */
1289 list_for_each_entry(path, &widget->dapm->card->paths, list) {
1290 if (path->kcontrol != kcontrol)
1293 /* found, now check type */
1295 path->connect = connect;
1300 dapm_power_widgets(widget->dapm, SND_SOC_DAPM_STREAM_NOP);
1305 /* show dapm widget status in sys fs */
1306 static ssize_t dapm_widget_show(struct device *dev,
1307 struct device_attribute *attr, char *buf)
1309 struct snd_soc_pcm_runtime *rtd =
1310 container_of(dev, struct snd_soc_pcm_runtime, dev);
1311 struct snd_soc_codec *codec =rtd->codec;
1312 struct snd_soc_dapm_widget *w;
1314 char *state = "not set";
1316 list_for_each_entry(w, &codec->card->widgets, list) {
1317 if (w->dapm != &codec->dapm)
1320 /* only display widgets that burnm power */
1322 case snd_soc_dapm_hp:
1323 case snd_soc_dapm_mic:
1324 case snd_soc_dapm_spk:
1325 case snd_soc_dapm_line:
1326 case snd_soc_dapm_micbias:
1327 case snd_soc_dapm_dac:
1328 case snd_soc_dapm_adc:
1329 case snd_soc_dapm_pga:
1330 case snd_soc_dapm_out_drv:
1331 case snd_soc_dapm_mixer:
1332 case snd_soc_dapm_mixer_named_ctl:
1333 case snd_soc_dapm_supply:
1335 count += sprintf(buf + count, "%s: %s\n",
1336 w->name, w->power ? "On":"Off");
1343 switch (codec->dapm.bias_level) {
1344 case SND_SOC_BIAS_ON:
1347 case SND_SOC_BIAS_PREPARE:
1350 case SND_SOC_BIAS_STANDBY:
1353 case SND_SOC_BIAS_OFF:
1357 count += sprintf(buf + count, "PM State: %s\n", state);
1362 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
1364 int snd_soc_dapm_sys_add(struct device *dev)
1366 return device_create_file(dev, &dev_attr_dapm_widget);
1369 static void snd_soc_dapm_sys_remove(struct device *dev)
1371 device_remove_file(dev, &dev_attr_dapm_widget);
1374 /* free all dapm widgets and resources */
1375 static void dapm_free_widgets(struct snd_soc_dapm_context *dapm)
1377 struct snd_soc_dapm_widget *w, *next_w;
1378 struct snd_soc_dapm_path *p, *next_p;
1380 list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
1381 if (w->dapm != dapm)
1385 * remove source and sink paths associated to this widget.
1386 * While removing the path, remove reference to it from both
1387 * source and sink widgets so that path is removed only once.
1389 list_for_each_entry_safe(p, next_p, &w->sources, list_sink) {
1390 list_del(&p->list_sink);
1391 list_del(&p->list_source);
1393 kfree(p->long_name);
1396 list_for_each_entry_safe(p, next_p, &w->sinks, list_source) {
1397 list_del(&p->list_sink);
1398 list_del(&p->list_source);
1400 kfree(p->long_name);
1408 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context *dapm,
1409 const char *pin, int status)
1411 struct snd_soc_dapm_widget *w;
1413 list_for_each_entry(w, &dapm->card->widgets, list) {
1414 if (w->dapm != dapm)
1416 if (!strcmp(w->name, pin)) {
1417 dev_dbg(w->dapm->dev, "dapm: pin %s = %d\n",
1419 w->connected = status;
1420 /* Allow disabling of forced pins */
1427 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
1432 * snd_soc_dapm_sync - scan and power dapm paths
1433 * @dapm: DAPM context
1435 * Walks all dapm audio paths and powers widgets according to their
1436 * stream or path usage.
1438 * Returns 0 for success.
1440 int snd_soc_dapm_sync(struct snd_soc_dapm_context *dapm)
1442 return dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1444 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
1446 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context *dapm,
1447 const struct snd_soc_dapm_route *route)
1449 struct snd_soc_dapm_path *path;
1450 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
1451 struct snd_soc_dapm_widget *wtsource = NULL, *wtsink = NULL;
1453 const char *control = route->control;
1455 char prefixed_sink[80];
1456 char prefixed_source[80];
1459 if (dapm->codec->name_prefix) {
1460 snprintf(prefixed_sink, sizeof(prefixed_sink), "%s %s",
1461 dapm->codec->name_prefix, route->sink);
1462 sink = prefixed_sink;
1463 snprintf(prefixed_source, sizeof(prefixed_source), "%s %s",
1464 dapm->codec->name_prefix, route->source);
1465 source = prefixed_source;
1468 source = route->source;
1472 * find src and dest widgets over all widgets but favor a widget from
1473 * current DAPM context
1475 list_for_each_entry(w, &dapm->card->widgets, list) {
1476 if (!wsink && !(strcmp(w->name, sink))) {
1478 if (w->dapm == dapm)
1482 if (!wsource && !(strcmp(w->name, source))) {
1484 if (w->dapm == dapm)
1488 /* use widget from another DAPM context if not found from this */
1494 if (wsource == NULL || wsink == NULL)
1497 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
1501 path->source = wsource;
1503 path->connected = route->connected;
1504 INIT_LIST_HEAD(&path->list);
1505 INIT_LIST_HEAD(&path->list_source);
1506 INIT_LIST_HEAD(&path->list_sink);
1508 /* check for external widgets */
1509 if (wsink->id == snd_soc_dapm_input) {
1510 if (wsource->id == snd_soc_dapm_micbias ||
1511 wsource->id == snd_soc_dapm_mic ||
1512 wsource->id == snd_soc_dapm_line ||
1513 wsource->id == snd_soc_dapm_output)
1516 if (wsource->id == snd_soc_dapm_output) {
1517 if (wsink->id == snd_soc_dapm_spk ||
1518 wsink->id == snd_soc_dapm_hp ||
1519 wsink->id == snd_soc_dapm_line ||
1520 wsink->id == snd_soc_dapm_input)
1524 /* connect static paths */
1525 if (control == NULL) {
1526 list_add(&path->list, &dapm->card->paths);
1527 list_add(&path->list_sink, &wsink->sources);
1528 list_add(&path->list_source, &wsource->sinks);
1533 /* connect dynamic paths */
1535 case snd_soc_dapm_adc:
1536 case snd_soc_dapm_dac:
1537 case snd_soc_dapm_pga:
1538 case snd_soc_dapm_out_drv:
1539 case snd_soc_dapm_input:
1540 case snd_soc_dapm_output:
1541 case snd_soc_dapm_micbias:
1542 case snd_soc_dapm_vmid:
1543 case snd_soc_dapm_pre:
1544 case snd_soc_dapm_post:
1545 case snd_soc_dapm_supply:
1546 case snd_soc_dapm_aif_in:
1547 case snd_soc_dapm_aif_out:
1548 list_add(&path->list, &dapm->card->paths);
1549 list_add(&path->list_sink, &wsink->sources);
1550 list_add(&path->list_source, &wsource->sinks);
1553 case snd_soc_dapm_mux:
1554 case snd_soc_dapm_virt_mux:
1555 case snd_soc_dapm_value_mux:
1556 ret = dapm_connect_mux(dapm, wsource, wsink, path, control,
1557 &wsink->kcontrols[0]);
1561 case snd_soc_dapm_switch:
1562 case snd_soc_dapm_mixer:
1563 case snd_soc_dapm_mixer_named_ctl:
1564 ret = dapm_connect_mixer(dapm, wsource, wsink, path, control);
1568 case snd_soc_dapm_hp:
1569 case snd_soc_dapm_mic:
1570 case snd_soc_dapm_line:
1571 case snd_soc_dapm_spk:
1572 list_add(&path->list, &dapm->card->paths);
1573 list_add(&path->list_sink, &wsink->sources);
1574 list_add(&path->list_source, &wsource->sinks);
1581 dev_warn(dapm->dev, "asoc: no dapm match for %s --> %s --> %s\n",
1582 source, control, sink);
1588 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1589 * @dapm: DAPM context
1590 * @route: audio routes
1591 * @num: number of routes
1593 * Connects 2 dapm widgets together via a named audio path. The sink is
1594 * the widget receiving the audio signal, whilst the source is the sender
1595 * of the audio signal.
1597 * Returns 0 for success else error. On error all resources can be freed
1598 * with a call to snd_soc_card_free().
1600 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context *dapm,
1601 const struct snd_soc_dapm_route *route, int num)
1605 for (i = 0; i < num; i++) {
1606 ret = snd_soc_dapm_add_route(dapm, route);
1608 dev_err(dapm->dev, "Failed to add route %s->%s\n",
1609 route->source, route->sink);
1617 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1620 * snd_soc_dapm_new_widgets - add new dapm widgets
1621 * @dapm: DAPM context
1623 * Checks the codec for any new dapm widgets and creates them if found.
1625 * Returns 0 for success.
1627 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context *dapm)
1629 struct snd_soc_dapm_widget *w;
1631 list_for_each_entry(w, &dapm->card->widgets, list)
1637 case snd_soc_dapm_switch:
1638 case snd_soc_dapm_mixer:
1639 case snd_soc_dapm_mixer_named_ctl:
1640 w->power_check = dapm_generic_check_power;
1641 dapm_new_mixer(dapm, w);
1643 case snd_soc_dapm_mux:
1644 case snd_soc_dapm_virt_mux:
1645 case snd_soc_dapm_value_mux:
1646 w->power_check = dapm_generic_check_power;
1647 dapm_new_mux(dapm, w);
1649 case snd_soc_dapm_adc:
1650 case snd_soc_dapm_aif_out:
1651 w->power_check = dapm_adc_check_power;
1653 case snd_soc_dapm_dac:
1654 case snd_soc_dapm_aif_in:
1655 w->power_check = dapm_dac_check_power;
1657 case snd_soc_dapm_pga:
1658 case snd_soc_dapm_out_drv:
1659 w->power_check = dapm_generic_check_power;
1660 dapm_new_pga(dapm, w);
1662 case snd_soc_dapm_input:
1663 case snd_soc_dapm_output:
1664 case snd_soc_dapm_micbias:
1665 case snd_soc_dapm_spk:
1666 case snd_soc_dapm_hp:
1667 case snd_soc_dapm_mic:
1668 case snd_soc_dapm_line:
1669 w->power_check = dapm_generic_check_power;
1671 case snd_soc_dapm_supply:
1672 w->power_check = dapm_supply_check_power;
1673 case snd_soc_dapm_vmid:
1674 case snd_soc_dapm_pre:
1675 case snd_soc_dapm_post:
1681 dapm_power_widgets(dapm, SND_SOC_DAPM_STREAM_NOP);
1684 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1687 * snd_soc_dapm_get_volsw - dapm mixer get callback
1688 * @kcontrol: mixer control
1689 * @ucontrol: control element information
1691 * Callback to get the value of a dapm mixer control.
1693 * Returns 0 for success.
1695 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1696 struct snd_ctl_elem_value *ucontrol)
1698 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1699 struct soc_mixer_control *mc =
1700 (struct soc_mixer_control *)kcontrol->private_value;
1701 unsigned int reg = mc->reg;
1702 unsigned int shift = mc->shift;
1703 unsigned int rshift = mc->rshift;
1705 unsigned int invert = mc->invert;
1706 unsigned int mask = (1 << fls(max)) - 1;
1708 ucontrol->value.integer.value[0] =
1709 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1710 if (shift != rshift)
1711 ucontrol->value.integer.value[1] =
1712 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1714 ucontrol->value.integer.value[0] =
1715 max - ucontrol->value.integer.value[0];
1716 if (shift != rshift)
1717 ucontrol->value.integer.value[1] =
1718 max - ucontrol->value.integer.value[1];
1723 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1726 * snd_soc_dapm_put_volsw - dapm mixer set callback
1727 * @kcontrol: mixer control
1728 * @ucontrol: control element information
1730 * Callback to set the value of a dapm mixer control.
1732 * Returns 0 for success.
1734 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1735 struct snd_ctl_elem_value *ucontrol)
1737 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1738 struct soc_mixer_control *mc =
1739 (struct soc_mixer_control *)kcontrol->private_value;
1740 unsigned int reg = mc->reg;
1741 unsigned int shift = mc->shift;
1743 unsigned int mask = (1 << fls(max)) - 1;
1744 unsigned int invert = mc->invert;
1746 int connect, change;
1747 struct snd_soc_dapm_update update;
1749 val = (ucontrol->value.integer.value[0] & mask);
1753 mask = mask << shift;
1756 mutex_lock(&widget->codec->mutex);
1757 widget->value = val;
1759 change = snd_soc_test_bits(widget->codec, reg, mask, val);
1762 /* new connection */
1763 connect = invert ? 0:1;
1765 /* old connection must be powered down */
1766 connect = invert ? 1:0;
1768 update.kcontrol = kcontrol;
1769 update.widget = widget;
1773 widget->dapm->update = &update;
1775 dapm_mixer_update_power(widget, kcontrol, connect);
1777 widget->dapm->update = NULL;
1780 mutex_unlock(&widget->codec->mutex);
1783 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1786 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1787 * @kcontrol: mixer control
1788 * @ucontrol: control element information
1790 * Callback to get the value of a dapm enumerated double mixer control.
1792 * Returns 0 for success.
1794 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1795 struct snd_ctl_elem_value *ucontrol)
1797 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1798 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1799 unsigned int val, bitmask;
1801 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1803 val = snd_soc_read(widget->codec, e->reg);
1804 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1805 if (e->shift_l != e->shift_r)
1806 ucontrol->value.enumerated.item[1] =
1807 (val >> e->shift_r) & (bitmask - 1);
1811 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1814 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1815 * @kcontrol: mixer control
1816 * @ucontrol: control element information
1818 * Callback to set the value of a dapm enumerated double mixer control.
1820 * Returns 0 for success.
1822 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1823 struct snd_ctl_elem_value *ucontrol)
1825 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1826 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1827 unsigned int val, mux, change;
1828 unsigned int mask, bitmask;
1829 struct snd_soc_dapm_update update;
1831 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1833 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1835 mux = ucontrol->value.enumerated.item[0];
1836 val = mux << e->shift_l;
1837 mask = (bitmask - 1) << e->shift_l;
1838 if (e->shift_l != e->shift_r) {
1839 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1841 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1842 mask |= (bitmask - 1) << e->shift_r;
1845 mutex_lock(&widget->codec->mutex);
1846 widget->value = val;
1847 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1849 update.kcontrol = kcontrol;
1850 update.widget = widget;
1851 update.reg = e->reg;
1854 widget->dapm->update = &update;
1856 dapm_mux_update_power(widget, kcontrol, change, mux, e);
1858 widget->dapm->update = NULL;
1860 mutex_unlock(&widget->codec->mutex);
1863 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1866 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1867 * @kcontrol: mixer control
1868 * @ucontrol: control element information
1870 * Returns 0 for success.
1872 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol *kcontrol,
1873 struct snd_ctl_elem_value *ucontrol)
1875 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1877 ucontrol->value.enumerated.item[0] = widget->value;
1881 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt);
1884 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1885 * @kcontrol: mixer control
1886 * @ucontrol: control element information
1888 * Returns 0 for success.
1890 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol *kcontrol,
1891 struct snd_ctl_elem_value *ucontrol)
1893 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1894 struct soc_enum *e =
1895 (struct soc_enum *)kcontrol->private_value;
1899 if (ucontrol->value.enumerated.item[0] >= e->max)
1902 mutex_lock(&widget->codec->mutex);
1904 change = widget->value != ucontrol->value.enumerated.item[0];
1905 widget->value = ucontrol->value.enumerated.item[0];
1906 dapm_mux_update_power(widget, kcontrol, change, widget->value, e);
1908 mutex_unlock(&widget->codec->mutex);
1911 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt);
1914 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1916 * @kcontrol: mixer control
1917 * @ucontrol: control element information
1919 * Callback to get the value of a dapm semi enumerated double mixer control.
1921 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1922 * used for handling bitfield coded enumeration for example.
1924 * Returns 0 for success.
1926 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1927 struct snd_ctl_elem_value *ucontrol)
1929 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1930 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1931 unsigned int reg_val, val, mux;
1933 reg_val = snd_soc_read(widget->codec, e->reg);
1934 val = (reg_val >> e->shift_l) & e->mask;
1935 for (mux = 0; mux < e->max; mux++) {
1936 if (val == e->values[mux])
1939 ucontrol->value.enumerated.item[0] = mux;
1940 if (e->shift_l != e->shift_r) {
1941 val = (reg_val >> e->shift_r) & e->mask;
1942 for (mux = 0; mux < e->max; mux++) {
1943 if (val == e->values[mux])
1946 ucontrol->value.enumerated.item[1] = mux;
1951 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1954 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1956 * @kcontrol: mixer control
1957 * @ucontrol: control element information
1959 * Callback to set the value of a dapm semi enumerated double mixer control.
1961 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1962 * used for handling bitfield coded enumeration for example.
1964 * Returns 0 for success.
1966 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1967 struct snd_ctl_elem_value *ucontrol)
1969 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1970 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1971 unsigned int val, mux, change;
1973 struct snd_soc_dapm_update update;
1975 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1977 mux = ucontrol->value.enumerated.item[0];
1978 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1979 mask = e->mask << e->shift_l;
1980 if (e->shift_l != e->shift_r) {
1981 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1983 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1984 mask |= e->mask << e->shift_r;
1987 mutex_lock(&widget->codec->mutex);
1988 widget->value = val;
1989 change = snd_soc_test_bits(widget->codec, e->reg, mask, val);
1991 update.kcontrol = kcontrol;
1992 update.widget = widget;
1993 update.reg = e->reg;
1996 widget->dapm->update = &update;
1998 dapm_mux_update_power(widget, kcontrol, change, mux, e);
2000 widget->dapm->update = NULL;
2002 mutex_unlock(&widget->codec->mutex);
2005 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
2008 * snd_soc_dapm_info_pin_switch - Info for a pin switch
2010 * @kcontrol: mixer control
2011 * @uinfo: control element information
2013 * Callback to provide information about a pin switch control.
2015 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol *kcontrol,
2016 struct snd_ctl_elem_info *uinfo)
2018 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2020 uinfo->value.integer.min = 0;
2021 uinfo->value.integer.max = 1;
2025 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch);
2028 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
2030 * @kcontrol: mixer control
2033 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol *kcontrol,
2034 struct snd_ctl_elem_value *ucontrol)
2036 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2037 const char *pin = (const char *)kcontrol->private_value;
2039 mutex_lock(&codec->mutex);
2041 ucontrol->value.integer.value[0] =
2042 snd_soc_dapm_get_pin_status(&codec->dapm, pin);
2044 mutex_unlock(&codec->mutex);
2048 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch);
2051 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
2053 * @kcontrol: mixer control
2056 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol *kcontrol,
2057 struct snd_ctl_elem_value *ucontrol)
2059 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2060 const char *pin = (const char *)kcontrol->private_value;
2062 mutex_lock(&codec->mutex);
2064 if (ucontrol->value.integer.value[0])
2065 snd_soc_dapm_enable_pin(&codec->dapm, pin);
2067 snd_soc_dapm_disable_pin(&codec->dapm, pin);
2069 snd_soc_dapm_sync(&codec->dapm);
2071 mutex_unlock(&codec->mutex);
2075 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch);
2078 * snd_soc_dapm_new_control - create new dapm control
2079 * @dapm: DAPM context
2080 * @widget: widget template
2082 * Creates a new dapm control based upon the template.
2084 * Returns 0 for success else error.
2086 int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
2087 const struct snd_soc_dapm_widget *widget)
2089 struct snd_soc_dapm_widget *w;
2092 if ((w = dapm_cnew_widget(widget)) == NULL)
2095 name_len = strlen(widget->name) + 1;
2096 if (dapm->codec->name_prefix)
2097 name_len += 1 + strlen(dapm->codec->name_prefix);
2098 w->name = kmalloc(name_len, GFP_KERNEL);
2099 if (w->name == NULL) {
2103 if (dapm->codec->name_prefix)
2104 snprintf(w->name, name_len, "%s %s",
2105 dapm->codec->name_prefix, widget->name);
2107 snprintf(w->name, name_len, "%s", widget->name);
2111 w->codec = dapm->codec;
2112 INIT_LIST_HEAD(&w->sources);
2113 INIT_LIST_HEAD(&w->sinks);
2114 INIT_LIST_HEAD(&w->list);
2115 list_add(&w->list, &dapm->card->widgets);
2117 /* machine layer set ups unconnected pins and insertions */
2121 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
2124 * snd_soc_dapm_new_controls - create new dapm controls
2125 * @dapm: DAPM context
2126 * @widget: widget array
2127 * @num: number of widgets
2129 * Creates new DAPM controls based upon the templates.
2131 * Returns 0 for success else error.
2133 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context *dapm,
2134 const struct snd_soc_dapm_widget *widget,
2139 for (i = 0; i < num; i++) {
2140 ret = snd_soc_dapm_new_control(dapm, widget);
2143 "ASoC: Failed to create DAPM control %s: %d\n",
2151 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
2153 static void soc_dapm_stream_event(struct snd_soc_dapm_context *dapm,
2154 const char *stream, int event)
2156 struct snd_soc_dapm_widget *w;
2158 list_for_each_entry(w, &dapm->card->widgets, list)
2160 if (!w->sname || w->dapm != dapm)
2162 dev_dbg(w->dapm->dev, "widget %s\n %s stream %s event %d\n",
2163 w->name, w->sname, stream, event);
2164 if (strstr(w->sname, stream)) {
2166 case SND_SOC_DAPM_STREAM_START:
2169 case SND_SOC_DAPM_STREAM_STOP:
2172 case SND_SOC_DAPM_STREAM_SUSPEND:
2173 case SND_SOC_DAPM_STREAM_RESUME:
2174 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
2175 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
2181 dapm_power_widgets(dapm, event);
2185 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2186 * @rtd: PCM runtime data
2187 * @stream: stream name
2188 * @event: stream event
2190 * Sends a stream event to the dapm core. The core then makes any
2191 * necessary widget power changes.
2193 * Returns 0 for success else error.
2195 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime *rtd,
2196 const char *stream, int event)
2198 struct snd_soc_codec *codec = rtd->codec;
2203 mutex_lock(&codec->mutex);
2204 soc_dapm_stream_event(&codec->dapm, stream, event);
2205 mutex_unlock(&codec->mutex);
2208 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
2211 * snd_soc_dapm_enable_pin - enable pin.
2212 * @dapm: DAPM context
2215 * Enables input/output pin and its parents or children widgets iff there is
2216 * a valid audio route and active audio stream.
2217 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2218 * do any widget power switching.
2220 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2222 return snd_soc_dapm_set_pin(dapm, pin, 1);
2224 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
2227 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2228 * @dapm: DAPM context
2231 * Enables input/output pin regardless of any other state. This is
2232 * intended for use with microphone bias supplies used in microphone
2235 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2236 * do any widget power switching.
2238 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context *dapm,
2241 struct snd_soc_dapm_widget *w;
2243 list_for_each_entry(w, &dapm->card->widgets, list) {
2244 if (w->dapm != dapm)
2246 if (!strcmp(w->name, pin)) {
2247 dev_dbg(w->dapm->dev,
2248 "dapm: force enable pin %s\n", pin);
2255 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2258 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin);
2261 * snd_soc_dapm_disable_pin - disable pin.
2262 * @dapm: DAPM context
2265 * Disables input/output pin and its parents or children widgets.
2266 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2267 * do any widget power switching.
2269 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context *dapm,
2272 return snd_soc_dapm_set_pin(dapm, pin, 0);
2274 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
2277 * snd_soc_dapm_nc_pin - permanently disable pin.
2278 * @dapm: DAPM context
2281 * Marks the specified pin as being not connected, disabling it along
2282 * any parent or child widgets. At present this is identical to
2283 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2284 * additional things such as disabling controls which only affect
2285 * paths through the pin.
2287 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2288 * do any widget power switching.
2290 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context *dapm, const char *pin)
2292 return snd_soc_dapm_set_pin(dapm, pin, 0);
2294 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
2297 * snd_soc_dapm_get_pin_status - get audio pin status
2298 * @dapm: DAPM context
2299 * @pin: audio signal pin endpoint (or start point)
2301 * Get audio pin status - connected or disconnected.
2303 * Returns 1 for connected otherwise 0.
2305 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context *dapm,
2308 struct snd_soc_dapm_widget *w;
2310 list_for_each_entry(w, &dapm->card->widgets, list) {
2311 if (w->dapm != dapm)
2313 if (!strcmp(w->name, pin))
2314 return w->connected;
2319 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
2322 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2323 * @dapm: DAPM context
2324 * @pin: audio signal pin endpoint (or start point)
2326 * Mark the given endpoint or pin as ignoring suspend. When the
2327 * system is disabled a path between two endpoints flagged as ignoring
2328 * suspend will not be disabled. The path must already be enabled via
2329 * normal means at suspend time, it will not be turned on if it was not
2332 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
2335 struct snd_soc_dapm_widget *w;
2337 list_for_each_entry(w, &dapm->card->widgets, list) {
2338 if (w->dapm != dapm)
2340 if (!strcmp(w->name, pin)) {
2341 w->ignore_suspend = 1;
2346 dev_err(dapm->dev, "dapm: unknown pin %s\n", pin);
2349 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend);
2352 * snd_soc_dapm_free - free dapm resources
2355 * Free all dapm widgets and resources.
2357 void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
2359 snd_soc_dapm_sys_remove(dapm->dev);
2360 dapm_free_widgets(dapm);
2361 list_del(&dapm->list);
2363 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
2365 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context *dapm)
2367 struct snd_soc_dapm_widget *w;
2368 LIST_HEAD(down_list);
2371 list_for_each_entry(w, &dapm->card->widgets, list) {
2372 if (w->dapm != dapm)
2375 dapm_seq_insert(w, &down_list, dapm_down_seq);
2381 /* If there were no widgets to power down we're already in
2385 snd_soc_dapm_set_bias_level(NULL, dapm, SND_SOC_BIAS_PREPARE);
2386 dapm_seq_run(dapm, &down_list, 0, dapm_down_seq);
2387 snd_soc_dapm_set_bias_level(NULL, dapm, SND_SOC_BIAS_STANDBY);
2392 * snd_soc_dapm_shutdown - callback for system shutdown
2394 void snd_soc_dapm_shutdown(struct snd_soc_card *card)
2396 struct snd_soc_codec *codec;
2398 list_for_each_entry(codec, &card->codec_dev_list, list) {
2399 soc_dapm_shutdown_codec(&codec->dapm);
2400 snd_soc_dapm_set_bias_level(card, &codec->dapm, SND_SOC_BIAS_OFF);
2404 /* Module information */
2405 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2406 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2407 MODULE_LICENSE("GPL");