2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood
6 * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
14 * o Changes power status of internal codec blocks depending on the
15 * dynamic configuration of codec internal audio paths and active
17 * o Platform power domain - can support external components i.e. amps and
18 * mic/meadphone insertion events.
19 * o Automatic Mic Bias support
20 * o Jack insertion power event initiation - e.g. hp insertion will enable
22 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
26 * o DAPM power change sequencing - allow for configurable per
28 * o Support for analogue bias optimisation.
29 * o Support for reduced codec oversampling rates.
30 * o Support for reduced codec bias currents.
33 #include <linux/module.h>
34 #include <linux/moduleparam.h>
35 #include <linux/init.h>
36 #include <linux/delay.h>
38 #include <linux/bitops.h>
39 #include <linux/platform_device.h>
40 #include <linux/jiffies.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>
50 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
51 #define dbg(format, arg...) printk(format, ## arg)
53 #define dump_dapm(codec, action)
54 #define dbg(format, arg...)
57 /* dapm power sequences - make this per codec in the future */
58 static int dapm_up_seq[] = {
59 snd_soc_dapm_pre, snd_soc_dapm_micbias, snd_soc_dapm_mic,
60 snd_soc_dapm_mux, snd_soc_dapm_dac, snd_soc_dapm_mixer, snd_soc_dapm_pga,
61 snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk, snd_soc_dapm_post
63 static int dapm_down_seq[] = {
64 snd_soc_dapm_pre, snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk,
65 snd_soc_dapm_pga, snd_soc_dapm_mixer, snd_soc_dapm_dac, snd_soc_dapm_mic,
66 snd_soc_dapm_micbias, snd_soc_dapm_mux, snd_soc_dapm_post
69 static int dapm_status = 1;
70 module_param(dapm_status, int, 0);
71 MODULE_PARM_DESC(dapm_status, "enable DPM sysfs entries");
73 static unsigned int pop_time;
75 static void pop_wait(void)
78 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
81 static void pop_dbg(const char *fmt, ...)
95 /* create a new dapm widget */
96 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
97 const struct snd_soc_dapm_widget *_widget)
99 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
102 /* set up initial codec paths */
103 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
104 struct snd_soc_dapm_path *p, int i)
107 case snd_soc_dapm_switch:
108 case snd_soc_dapm_mixer: {
110 int reg = w->kcontrols[i].private_value & 0xff;
111 int shift = (w->kcontrols[i].private_value >> 8) & 0x0f;
112 int mask = (w->kcontrols[i].private_value >> 16) & 0xff;
113 int invert = (w->kcontrols[i].private_value >> 24) & 0x01;
115 val = snd_soc_read(w->codec, reg);
116 val = (val >> shift) & mask;
118 if ((invert && !val) || (!invert && val))
124 case snd_soc_dapm_mux: {
125 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
126 int val, item, bitmask;
128 for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
130 val = snd_soc_read(w->codec, e->reg);
131 item = (val >> e->shift_l) & (bitmask - 1);
134 for (i = 0; i < e->mask; i++) {
135 if (!(strcmp(p->name, e->texts[i])) && item == i)
140 /* does not effect routing - always connected */
141 case snd_soc_dapm_pga:
142 case snd_soc_dapm_output:
143 case snd_soc_dapm_adc:
144 case snd_soc_dapm_input:
145 case snd_soc_dapm_dac:
146 case snd_soc_dapm_micbias:
147 case snd_soc_dapm_vmid:
150 /* does effect routing - dynamically connected */
151 case snd_soc_dapm_hp:
152 case snd_soc_dapm_mic:
153 case snd_soc_dapm_spk:
154 case snd_soc_dapm_line:
155 case snd_soc_dapm_pre:
156 case snd_soc_dapm_post:
162 /* connect mux widget to it's interconnecting audio paths */
163 static int dapm_connect_mux(struct snd_soc_codec *codec,
164 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
165 struct snd_soc_dapm_path *path, const char *control_name,
166 const struct snd_kcontrol_new *kcontrol)
168 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
171 for (i = 0; i < e->mask; i++) {
172 if (!(strcmp(control_name, e->texts[i]))) {
173 list_add(&path->list, &codec->dapm_paths);
174 list_add(&path->list_sink, &dest->sources);
175 list_add(&path->list_source, &src->sinks);
176 path->name = (char*)e->texts[i];
177 dapm_set_path_status(dest, path, 0);
185 /* connect mixer widget to it's interconnecting audio paths */
186 static int dapm_connect_mixer(struct snd_soc_codec *codec,
187 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
188 struct snd_soc_dapm_path *path, const char *control_name)
192 /* search for mixer kcontrol */
193 for (i = 0; i < dest->num_kcontrols; i++) {
194 if (!strcmp(control_name, dest->kcontrols[i].name)) {
195 list_add(&path->list, &codec->dapm_paths);
196 list_add(&path->list_sink, &dest->sources);
197 list_add(&path->list_source, &src->sinks);
198 path->name = dest->kcontrols[i].name;
199 dapm_set_path_status(dest, path, i);
206 /* update dapm codec register bits */
207 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
210 unsigned short old, new;
211 struct snd_soc_codec *codec = widget->codec;
213 /* check for valid widgets */
214 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
215 widget->id == snd_soc_dapm_output ||
216 widget->id == snd_soc_dapm_hp ||
217 widget->id == snd_soc_dapm_mic ||
218 widget->id == snd_soc_dapm_line ||
219 widget->id == snd_soc_dapm_spk)
222 power = widget->power;
224 power = (power ? 0:1);
226 old = snd_soc_read(codec, widget->reg);
227 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
231 pop_dbg("pop test %s : %s in %d ms\n", widget->name,
232 widget->power ? "on" : "off", pop_time);
233 snd_soc_write(codec, widget->reg, new);
236 dbg("reg %x old %x new %x change %d\n", widget->reg, old, new, change);
240 /* ramps the volume up or down to minimise pops before or after a
241 * DAPM power event */
242 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
244 const struct snd_kcontrol_new *k = widget->kcontrols;
246 if (widget->muted && !power)
248 if (!widget->muted && power)
251 if (widget->num_kcontrols && k) {
252 int reg = k->private_value & 0xff;
253 int shift = (k->private_value >> 8) & 0x0f;
254 int mask = (k->private_value >> 16) & 0xff;
255 int invert = (k->private_value >> 24) & 0x01;
259 /* power up has happended, increase volume to last level */
261 for (i = mask; i > widget->saved_value; i--)
262 snd_soc_update_bits(widget->codec, reg, mask, i);
264 for (i = 0; i < widget->saved_value; i++)
265 snd_soc_update_bits(widget->codec, reg, mask, i);
269 /* power down is about to occur, decrease volume to mute */
270 int val = snd_soc_read(widget->codec, reg);
271 int i = widget->saved_value = (val >> shift) & mask;
273 for (; i < mask; i++)
274 snd_soc_update_bits(widget->codec, reg, mask, i);
277 snd_soc_update_bits(widget->codec, reg, mask, i);
285 /* create new dapm mixer control */
286 static int dapm_new_mixer(struct snd_soc_codec *codec,
287 struct snd_soc_dapm_widget *w)
291 struct snd_soc_dapm_path *path;
294 for (i = 0; i < w->num_kcontrols; i++) {
297 list_for_each_entry(path, &w->sources, list_sink) {
299 /* mixer/mux paths name must match control name */
300 if (path->name != (char*)w->kcontrols[i].name)
303 /* add dapm control with long name */
304 snprintf(name, 32, "%s %s", w->name, w->kcontrols[i].name);
305 path->long_name = kstrdup (name, GFP_KERNEL);
306 if (path->long_name == NULL)
309 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
311 ret = snd_ctl_add(codec->card, path->kcontrol);
313 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s\n",
315 kfree(path->long_name);
316 path->long_name = NULL;
324 /* create new dapm mux control */
325 static int dapm_new_mux(struct snd_soc_codec *codec,
326 struct snd_soc_dapm_widget *w)
328 struct snd_soc_dapm_path *path = NULL;
329 struct snd_kcontrol *kcontrol;
332 if (!w->num_kcontrols) {
333 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
337 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
338 ret = snd_ctl_add(codec->card, kcontrol);
342 list_for_each_entry(path, &w->sources, list_sink)
343 path->kcontrol = kcontrol;
348 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
352 /* create new dapm volume control */
353 static int dapm_new_pga(struct snd_soc_codec *codec,
354 struct snd_soc_dapm_widget *w)
356 struct snd_kcontrol *kcontrol;
359 if (!w->num_kcontrols)
362 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
363 ret = snd_ctl_add(codec->card, kcontrol);
365 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
372 /* reset 'walked' bit for each dapm path */
373 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
375 struct snd_soc_dapm_path *p;
377 list_for_each_entry(p, &codec->dapm_paths, list)
382 * Recursively check for a completed path to an active or physically connected
383 * output widget. Returns number of complete paths.
385 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
387 struct snd_soc_dapm_path *path;
390 if (widget->id == snd_soc_dapm_adc && widget->active)
393 if (widget->connected) {
394 /* connected pin ? */
395 if (widget->id == snd_soc_dapm_output && !widget->ext)
398 /* connected jack or spk ? */
399 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
400 widget->id == snd_soc_dapm_line)
404 list_for_each_entry(path, &widget->sinks, list_source) {
408 if (path->sink && path->connect) {
410 con += is_connected_output_ep(path->sink);
418 * Recursively check for a completed path to an active or physically connected
419 * input widget. Returns number of complete paths.
421 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
423 struct snd_soc_dapm_path *path;
426 /* active stream ? */
427 if (widget->id == snd_soc_dapm_dac && widget->active)
430 if (widget->connected) {
431 /* connected pin ? */
432 if (widget->id == snd_soc_dapm_input && !widget->ext)
435 /* connected VMID/Bias for lower pops */
436 if (widget->id == snd_soc_dapm_vmid)
439 /* connected jack ? */
440 if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line)
444 list_for_each_entry(path, &widget->sources, list_sink) {
448 if (path->source && path->connect) {
450 con += is_connected_input_ep(path->source);
458 * Handler for generic register modifier widget.
460 int dapm_reg_event(struct snd_soc_dapm_widget *w,
461 struct snd_kcontrol *kcontrol, int event)
465 if (SND_SOC_DAPM_EVENT_ON(event))
470 snd_soc_update_bits(w->codec, -(w->reg + 1),
471 w->mask << w->shift, val << w->shift);
477 * Scan each dapm widget for complete audio path.
478 * A complete path is a route that has valid endpoints i.e.:-
480 * o DAC to output pin.
481 * o Input Pin to ADC.
482 * o Input pin to Output pin (bypass, sidetone)
483 * o DAC to ADC (loopback).
485 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
487 struct snd_soc_dapm_widget *w;
488 int in, out, i, c = 1, *seq = NULL, ret = 0, power_change, power;
490 /* do we have a sequenced stream event */
491 if (event == SND_SOC_DAPM_STREAM_START) {
492 c = ARRAY_SIZE(dapm_up_seq);
494 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
495 c = ARRAY_SIZE(dapm_down_seq);
499 for(i = 0; i < c; i++) {
500 list_for_each_entry(w, &codec->dapm_widgets, list) {
502 /* is widget in stream order */
503 if (seq && seq[i] && w->id != seq[i])
506 /* vmid - no action */
507 if (w->id == snd_soc_dapm_vmid)
511 if (w->id == snd_soc_dapm_adc && w->active) {
512 in = is_connected_input_ep(w);
513 dapm_clear_walk(w->codec);
514 w->power = (in != 0) ? 1 : 0;
520 if (w->id == snd_soc_dapm_dac && w->active) {
521 out = is_connected_output_ep(w);
522 dapm_clear_walk(w->codec);
523 w->power = (out != 0) ? 1 : 0;
528 /* programmable gain/attenuation */
529 if (w->id == snd_soc_dapm_pga) {
531 in = is_connected_input_ep(w);
532 dapm_clear_walk(w->codec);
533 out = is_connected_output_ep(w);
534 dapm_clear_walk(w->codec);
535 w->power = on = (out != 0 && in != 0) ? 1 : 0;
538 dapm_set_pga(w, on); /* lower volume to reduce pops */
541 dapm_set_pga(w, on); /* restore volume from zero */
546 /* pre and post event widgets */
547 if (w->id == snd_soc_dapm_pre) {
551 if (event == SND_SOC_DAPM_STREAM_START) {
553 NULL, SND_SOC_DAPM_PRE_PMU);
556 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
558 NULL, SND_SOC_DAPM_PRE_PMD);
564 if (w->id == snd_soc_dapm_post) {
568 if (event == SND_SOC_DAPM_STREAM_START) {
570 NULL, SND_SOC_DAPM_POST_PMU);
573 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
575 NULL, SND_SOC_DAPM_POST_PMD);
582 /* all other widgets */
583 in = is_connected_input_ep(w);
584 dapm_clear_walk(w->codec);
585 out = is_connected_output_ep(w);
586 dapm_clear_walk(w->codec);
587 power = (out != 0 && in != 0) ? 1 : 0;
588 power_change = (w->power == power) ? 0: 1;
591 /* call any power change event handlers */
594 dbg("power %s event for %s flags %x\n",
595 w->power ? "on" : "off", w->name, w->event_flags);
598 if (w->event_flags & SND_SOC_DAPM_PRE_PMU) {
600 NULL, SND_SOC_DAPM_PRE_PMU);
605 if (w->event_flags & SND_SOC_DAPM_POST_PMU){
607 NULL, SND_SOC_DAPM_POST_PMU);
612 /* power down event */
613 if (w->event_flags & SND_SOC_DAPM_PRE_PMD) {
615 NULL, SND_SOC_DAPM_PRE_PMD);
620 if (w->event_flags & SND_SOC_DAPM_POST_PMD) {
622 NULL, SND_SOC_DAPM_POST_PMD);
628 /* no event handler */
638 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
640 struct snd_soc_dapm_widget *w;
641 struct snd_soc_dapm_path *p = NULL;
644 printk("DAPM %s %s\n", codec->name, action);
646 list_for_each_entry(w, &codec->dapm_widgets, list) {
648 /* only display widgets that effect routing */
650 case snd_soc_dapm_pre:
651 case snd_soc_dapm_post:
652 case snd_soc_dapm_vmid:
654 case snd_soc_dapm_mux:
655 case snd_soc_dapm_output:
656 case snd_soc_dapm_input:
657 case snd_soc_dapm_switch:
658 case snd_soc_dapm_hp:
659 case snd_soc_dapm_mic:
660 case snd_soc_dapm_spk:
661 case snd_soc_dapm_line:
662 case snd_soc_dapm_micbias:
663 case snd_soc_dapm_dac:
664 case snd_soc_dapm_adc:
665 case snd_soc_dapm_pga:
666 case snd_soc_dapm_mixer:
668 in = is_connected_input_ep(w);
669 dapm_clear_walk(w->codec);
670 out = is_connected_output_ep(w);
671 dapm_clear_walk(w->codec);
672 printk("%s: %s in %d out %d\n", w->name,
673 w->power ? "On":"Off",in, out);
675 list_for_each_entry(p, &w->sources, list_sink) {
677 printk(" in %s %s\n", p->name ? p->name : "static",
680 list_for_each_entry(p, &w->sinks, list_source) {
682 printk(" out %s %s\n", p->name ? p->name : "static",
692 /* test and update the power status of a mux widget */
693 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
694 struct snd_kcontrol *kcontrol, int mask,
695 int val, struct soc_enum* e)
697 struct snd_soc_dapm_path *path;
700 if (widget->id != snd_soc_dapm_mux)
703 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
706 /* find dapm widget path assoc with kcontrol */
707 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
708 if (path->kcontrol != kcontrol)
711 if (!path->name || ! e->texts[val])
715 /* we now need to match the string in the enum to the path */
716 if (!(strcmp(path->name, e->texts[val])))
717 path->connect = 1; /* new connection */
719 path->connect = 0; /* old connection must be powered down */
723 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
728 /* test and update the power status of a mixer or switch widget */
729 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
730 struct snd_kcontrol *kcontrol, int reg,
731 int val_mask, int val, int invert)
733 struct snd_soc_dapm_path *path;
736 if (widget->id != snd_soc_dapm_mixer &&
737 widget->id != snd_soc_dapm_switch)
740 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
743 /* find dapm widget path assoc with kcontrol */
744 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
745 if (path->kcontrol != kcontrol)
748 /* found, now check type */
752 path->connect = invert ? 0:1;
754 /* old connection must be powered down */
755 path->connect = invert ? 1:0;
760 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
765 /* show dapm widget status in sys fs */
766 static ssize_t dapm_widget_show(struct device *dev,
767 struct device_attribute *attr, char *buf)
769 struct snd_soc_device *devdata = dev_get_drvdata(dev);
770 struct snd_soc_codec *codec = devdata->codec;
771 struct snd_soc_dapm_widget *w;
773 char *state = "not set";
775 list_for_each_entry(w, &codec->dapm_widgets, list) {
777 /* only display widgets that burnm power */
779 case snd_soc_dapm_hp:
780 case snd_soc_dapm_mic:
781 case snd_soc_dapm_spk:
782 case snd_soc_dapm_line:
783 case snd_soc_dapm_micbias:
784 case snd_soc_dapm_dac:
785 case snd_soc_dapm_adc:
786 case snd_soc_dapm_pga:
787 case snd_soc_dapm_mixer:
789 count += sprintf(buf + count, "%s: %s\n",
790 w->name, w->power ? "On":"Off");
797 switch (codec->bias_level) {
798 case SND_SOC_BIAS_ON:
801 case SND_SOC_BIAS_PREPARE:
804 case SND_SOC_BIAS_STANDBY:
807 case SND_SOC_BIAS_OFF:
811 count += sprintf(buf + count, "PM State: %s\n", state);
816 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
818 /* pop/click delay times */
819 static ssize_t dapm_pop_time_show(struct device *dev,
820 struct device_attribute *attr, char *buf)
822 return sprintf(buf, "%d\n", pop_time);
825 static ssize_t dapm_pop_time_store(struct device *dev,
826 struct device_attribute *attr,
827 const char *buf, size_t count)
832 if (strict_strtoul(buf, 10, &val) >= 0)
835 printk(KERN_ERR "Unable to parse pop_time setting\n");
840 static DEVICE_ATTR(dapm_pop_time, 0744, dapm_pop_time_show,
841 dapm_pop_time_store);
843 int snd_soc_dapm_sys_add(struct device *dev)
848 ret = device_create_file(dev, &dev_attr_dapm_widget);
851 ret = device_create_file(dev, &dev_attr_dapm_pop_time);
857 static void snd_soc_dapm_sys_remove(struct device *dev)
860 device_remove_file(dev, &dev_attr_dapm_pop_time);
861 device_remove_file(dev, &dev_attr_dapm_widget);
865 /* free all dapm widgets and resources */
866 static void dapm_free_widgets(struct snd_soc_codec *codec)
868 struct snd_soc_dapm_widget *w, *next_w;
869 struct snd_soc_dapm_path *p, *next_p;
871 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
876 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
884 * snd_soc_dapm_sync_endpoints - scan and power dapm paths
885 * @codec: audio codec
887 * Walks all dapm audio paths and powers widgets according to their
888 * stream or path usage.
890 * Returns 0 for success.
892 int snd_soc_dapm_sync_endpoints(struct snd_soc_codec *codec)
894 return dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
896 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync_endpoints);
898 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
899 const char *sink, const char *control, const char *source)
901 struct snd_soc_dapm_path *path;
902 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
905 /* find src and dest widgets */
906 list_for_each_entry(w, &codec->dapm_widgets, list) {
908 if (!wsink && !(strcmp(w->name, sink))) {
912 if (!wsource && !(strcmp(w->name, source))) {
917 if (wsource == NULL || wsink == NULL)
920 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
924 path->source = wsource;
926 INIT_LIST_HEAD(&path->list);
927 INIT_LIST_HEAD(&path->list_source);
928 INIT_LIST_HEAD(&path->list_sink);
930 /* check for external widgets */
931 if (wsink->id == snd_soc_dapm_input) {
932 if (wsource->id == snd_soc_dapm_micbias ||
933 wsource->id == snd_soc_dapm_mic ||
934 wsink->id == snd_soc_dapm_line ||
935 wsink->id == snd_soc_dapm_output)
938 if (wsource->id == snd_soc_dapm_output) {
939 if (wsink->id == snd_soc_dapm_spk ||
940 wsink->id == snd_soc_dapm_hp ||
941 wsink->id == snd_soc_dapm_line ||
942 wsink->id == snd_soc_dapm_input)
946 /* connect static paths */
947 if (control == NULL) {
948 list_add(&path->list, &codec->dapm_paths);
949 list_add(&path->list_sink, &wsink->sources);
950 list_add(&path->list_source, &wsource->sinks);
955 /* connect dynamic paths */
957 case snd_soc_dapm_adc:
958 case snd_soc_dapm_dac:
959 case snd_soc_dapm_pga:
960 case snd_soc_dapm_input:
961 case snd_soc_dapm_output:
962 case snd_soc_dapm_micbias:
963 case snd_soc_dapm_vmid:
964 case snd_soc_dapm_pre:
965 case snd_soc_dapm_post:
966 list_add(&path->list, &codec->dapm_paths);
967 list_add(&path->list_sink, &wsink->sources);
968 list_add(&path->list_source, &wsource->sinks);
971 case snd_soc_dapm_mux:
972 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
973 &wsink->kcontrols[0]);
977 case snd_soc_dapm_switch:
978 case snd_soc_dapm_mixer:
979 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
983 case snd_soc_dapm_hp:
984 case snd_soc_dapm_mic:
985 case snd_soc_dapm_line:
986 case snd_soc_dapm_spk:
987 list_add(&path->list, &codec->dapm_paths);
988 list_add(&path->list_sink, &wsink->sources);
989 list_add(&path->list_source, &wsource->sinks);
996 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1003 * snd_soc_dapm_connect_input - connect dapm widgets
1004 * @codec: audio codec
1005 * @sink: name of target widget
1006 * @control: mixer control name
1007 * @source: name of source name
1009 * Connects 2 dapm widgets together via a named audio path. The sink is
1010 * the widget receiving the audio signal, whilst the source is the sender
1011 * of the audio signal.
1013 * This function has been deprecated in favour of snd_soc_dapm_add_routes().
1015 * Returns 0 for success else error.
1017 int snd_soc_dapm_connect_input(struct snd_soc_codec *codec, const char *sink,
1018 const char *control, const char *source)
1020 return snd_soc_dapm_add_route(codec, sink, control, source);
1022 EXPORT_SYMBOL_GPL(snd_soc_dapm_connect_input);
1025 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1027 * @route: audio routes
1028 * @num: number of routes
1030 * Connects 2 dapm widgets together via a named audio path. The sink is
1031 * the widget receiving the audio signal, whilst the source is the sender
1032 * of the audio signal.
1034 * Returns 0 for success else error. On error all resources can be freed
1035 * with a call to snd_soc_card_free().
1037 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1038 const struct snd_soc_dapm_route *route, int num)
1042 for (i = 0; i < num; i++) {
1043 ret = snd_soc_dapm_add_route(codec, route->sink,
1044 route->control, route->source);
1046 printk(KERN_ERR "Failed to add route %s->%s\n",
1056 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1059 * snd_soc_dapm_new_widgets - add new dapm widgets
1060 * @codec: audio codec
1062 * Checks the codec for any new dapm widgets and creates them if found.
1064 * Returns 0 for success.
1066 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1068 struct snd_soc_dapm_widget *w;
1070 list_for_each_entry(w, &codec->dapm_widgets, list)
1076 case snd_soc_dapm_switch:
1077 case snd_soc_dapm_mixer:
1078 dapm_new_mixer(codec, w);
1080 case snd_soc_dapm_mux:
1081 dapm_new_mux(codec, w);
1083 case snd_soc_dapm_adc:
1084 case snd_soc_dapm_dac:
1085 case snd_soc_dapm_pga:
1086 dapm_new_pga(codec, w);
1088 case snd_soc_dapm_input:
1089 case snd_soc_dapm_output:
1090 case snd_soc_dapm_micbias:
1091 case snd_soc_dapm_spk:
1092 case snd_soc_dapm_hp:
1093 case snd_soc_dapm_mic:
1094 case snd_soc_dapm_line:
1095 case snd_soc_dapm_vmid:
1096 case snd_soc_dapm_pre:
1097 case snd_soc_dapm_post:
1103 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1106 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1109 * snd_soc_dapm_get_volsw - dapm mixer get callback
1110 * @kcontrol: mixer control
1111 * @uinfo: control element information
1113 * Callback to get the value of a dapm mixer control.
1115 * Returns 0 for success.
1117 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1118 struct snd_ctl_elem_value *ucontrol)
1120 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1121 int reg = kcontrol->private_value & 0xff;
1122 int shift = (kcontrol->private_value >> 8) & 0x0f;
1123 int rshift = (kcontrol->private_value >> 12) & 0x0f;
1124 int max = (kcontrol->private_value >> 16) & 0xff;
1125 int invert = (kcontrol->private_value >> 24) & 0x01;
1126 int mask = (1 << fls(max)) - 1;
1128 /* return the saved value if we are powered down */
1129 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1130 ucontrol->value.integer.value[0] = widget->saved_value;
1134 ucontrol->value.integer.value[0] =
1135 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1136 if (shift != rshift)
1137 ucontrol->value.integer.value[1] =
1138 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1140 ucontrol->value.integer.value[0] =
1141 max - ucontrol->value.integer.value[0];
1142 if (shift != rshift)
1143 ucontrol->value.integer.value[1] =
1144 max - ucontrol->value.integer.value[1];
1149 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1152 * snd_soc_dapm_put_volsw - dapm mixer set callback
1153 * @kcontrol: mixer control
1154 * @uinfo: control element information
1156 * Callback to set the value of a dapm mixer control.
1158 * Returns 0 for success.
1160 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1161 struct snd_ctl_elem_value *ucontrol)
1163 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1164 int reg = kcontrol->private_value & 0xff;
1165 int shift = (kcontrol->private_value >> 8) & 0x0f;
1166 int rshift = (kcontrol->private_value >> 12) & 0x0f;
1167 int max = (kcontrol->private_value >> 16) & 0xff;
1168 int mask = (1 << fls(max)) - 1;
1169 int invert = (kcontrol->private_value >> 24) & 0x01;
1170 unsigned short val, val2, val_mask;
1173 val = (ucontrol->value.integer.value[0] & mask);
1177 val_mask = mask << shift;
1179 if (shift != rshift) {
1180 val2 = (ucontrol->value.integer.value[1] & mask);
1183 val_mask |= mask << rshift;
1184 val |= val2 << rshift;
1187 mutex_lock(&widget->codec->mutex);
1188 widget->value = val;
1190 /* save volume value if the widget is powered down */
1191 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1192 widget->saved_value = val;
1193 mutex_unlock(&widget->codec->mutex);
1197 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1198 if (widget->event) {
1199 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1200 ret = widget->event(widget, kcontrol,
1201 SND_SOC_DAPM_PRE_REG);
1207 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1208 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1209 ret = widget->event(widget, kcontrol,
1210 SND_SOC_DAPM_POST_REG);
1212 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1215 mutex_unlock(&widget->codec->mutex);
1218 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1221 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1222 * @kcontrol: mixer control
1223 * @uinfo: control element information
1225 * Callback to get the value of a dapm enumerated double mixer control.
1227 * Returns 0 for success.
1229 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1230 struct snd_ctl_elem_value *ucontrol)
1232 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1233 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1234 unsigned short val, bitmask;
1236 for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
1238 val = snd_soc_read(widget->codec, e->reg);
1239 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1240 if (e->shift_l != e->shift_r)
1241 ucontrol->value.enumerated.item[1] =
1242 (val >> e->shift_r) & (bitmask - 1);
1246 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1249 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1250 * @kcontrol: mixer control
1251 * @uinfo: control element information
1253 * Callback to set the value of a dapm enumerated double mixer control.
1255 * Returns 0 for success.
1257 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1258 struct snd_ctl_elem_value *ucontrol)
1260 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1261 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1262 unsigned short val, mux;
1263 unsigned short mask, bitmask;
1266 for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
1268 if (ucontrol->value.enumerated.item[0] > e->mask - 1)
1270 mux = ucontrol->value.enumerated.item[0];
1271 val = mux << e->shift_l;
1272 mask = (bitmask - 1) << e->shift_l;
1273 if (e->shift_l != e->shift_r) {
1274 if (ucontrol->value.enumerated.item[1] > e->mask - 1)
1276 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1277 mask |= (bitmask - 1) << e->shift_r;
1280 mutex_lock(&widget->codec->mutex);
1281 widget->value = val;
1282 dapm_mux_update_power(widget, kcontrol, mask, mux, e);
1283 if (widget->event) {
1284 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1285 ret = widget->event(widget,
1286 kcontrol, SND_SOC_DAPM_PRE_REG);
1290 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1291 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1292 ret = widget->event(widget,
1293 kcontrol, SND_SOC_DAPM_POST_REG);
1295 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1298 mutex_unlock(&widget->codec->mutex);
1301 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1304 * snd_soc_dapm_new_control - create new dapm control
1305 * @codec: audio codec
1306 * @widget: widget template
1308 * Creates a new dapm control based upon the template.
1310 * Returns 0 for success else error.
1312 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1313 const struct snd_soc_dapm_widget *widget)
1315 struct snd_soc_dapm_widget *w;
1317 if ((w = dapm_cnew_widget(widget)) == NULL)
1321 INIT_LIST_HEAD(&w->sources);
1322 INIT_LIST_HEAD(&w->sinks);
1323 INIT_LIST_HEAD(&w->list);
1324 list_add(&w->list, &codec->dapm_widgets);
1326 /* machine layer set ups unconnected pins and insertions */
1330 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1333 * snd_soc_dapm_new_controls - create new dapm controls
1334 * @codec: audio codec
1335 * @widget: widget array
1336 * @num: number of widgets
1338 * Creates new DAPM controls based upon the templates.
1340 * Returns 0 for success else error.
1342 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1343 const struct snd_soc_dapm_widget *widget,
1348 for (i = 0; i < num; i++) {
1349 ret = snd_soc_dapm_new_control(codec, widget);
1356 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1360 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1361 * @codec: audio codec
1362 * @stream: stream name
1363 * @event: stream event
1365 * Sends a stream event to the dapm core. The core then makes any
1366 * necessary widget power changes.
1368 * Returns 0 for success else error.
1370 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1371 char *stream, int event)
1373 struct snd_soc_dapm_widget *w;
1378 mutex_lock(&codec->mutex);
1379 list_for_each_entry(w, &codec->dapm_widgets, list)
1383 dbg("widget %s\n %s stream %s event %d\n", w->name, w->sname,
1385 if (strstr(w->sname, stream)) {
1387 case SND_SOC_DAPM_STREAM_START:
1390 case SND_SOC_DAPM_STREAM_STOP:
1393 case SND_SOC_DAPM_STREAM_SUSPEND:
1398 case SND_SOC_DAPM_STREAM_RESUME:
1404 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
1406 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
1411 mutex_unlock(&codec->mutex);
1413 dapm_power_widgets(codec, event);
1414 dump_dapm(codec, __func__);
1417 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
1420 * snd_soc_dapm_set_bias_level - set the bias level for the system
1421 * @socdev: audio device
1422 * @level: level to configure
1424 * Configure the bias (power) levels for the SoC audio device.
1426 * Returns 0 for success else error.
1428 int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
1429 enum snd_soc_bias_level level)
1431 struct snd_soc_codec *codec = socdev->codec;
1432 struct snd_soc_machine *machine = socdev->machine;
1435 if (machine->set_bias_level)
1436 ret = machine->set_bias_level(machine, level);
1437 if (ret == 0 && codec->set_bias_level)
1438 ret = codec->set_bias_level(codec, level);
1444 * snd_soc_dapm_set_endpoint - set audio endpoint status
1445 * @codec: audio codec
1446 * @endpoint: audio signal endpoint (or start point)
1447 * @status: point status
1449 * Set audio endpoint status - connected or disconnected.
1451 * Returns 0 for success else error.
1453 int snd_soc_dapm_set_endpoint(struct snd_soc_codec *codec,
1454 char *endpoint, int status)
1456 struct snd_soc_dapm_widget *w;
1458 list_for_each_entry(w, &codec->dapm_widgets, list) {
1459 if (!strcmp(w->name, endpoint)) {
1460 w->connected = status;
1467 EXPORT_SYMBOL_GPL(snd_soc_dapm_set_endpoint);
1470 * snd_soc_dapm_get_endpoint_status - get audio endpoint status
1471 * @codec: audio codec
1472 * @endpoint: audio signal endpoint (or start point)
1474 * Get audio endpoint status - connected or disconnected.
1478 int snd_soc_dapm_get_endpoint_status(struct snd_soc_codec *codec,
1481 struct snd_soc_dapm_widget *w;
1483 list_for_each_entry(w, &codec->dapm_widgets, list) {
1484 if (!strcmp(w->name, endpoint))
1485 return w->connected;
1490 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_endpoint_status);
1493 * snd_soc_dapm_free - free dapm resources
1494 * @socdev: SoC device
1496 * Free all dapm widgets and resources.
1498 void snd_soc_dapm_free(struct snd_soc_device *socdev)
1500 struct snd_soc_codec *codec = socdev->codec;
1502 snd_soc_dapm_sys_remove(socdev->dev);
1503 dapm_free_widgets(codec);
1505 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
1507 /* Module information */
1508 MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com");
1509 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1510 MODULE_LICENSE("GPL");