2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc-dapm.h>
44 #include <sound/initval.h>
48 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
50 #define dump_dapm(codec, action)
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq[] = {
55 snd_soc_dapm_pre, snd_soc_dapm_micbias, snd_soc_dapm_mic,
56 snd_soc_dapm_mux, snd_soc_dapm_value_mux, snd_soc_dapm_dac,
57 snd_soc_dapm_mixer, snd_soc_dapm_mixer_named_ctl, snd_soc_dapm_pga,
58 snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk, snd_soc_dapm_post
61 static int dapm_down_seq[] = {
62 snd_soc_dapm_pre, snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk,
63 snd_soc_dapm_pga, snd_soc_dapm_mixer_named_ctl, snd_soc_dapm_mixer,
64 snd_soc_dapm_dac, snd_soc_dapm_mic, snd_soc_dapm_micbias,
65 snd_soc_dapm_mux, snd_soc_dapm_value_mux, snd_soc_dapm_post
68 static int dapm_status = 1;
69 module_param(dapm_status, int, 0);
70 MODULE_PARM_DESC(dapm_status, "enable DPM sysfs entries");
72 static void pop_wait(u32 pop_time)
75 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
78 static void pop_dbg(u32 pop_time, const char *fmt, ...)
92 /* create a new dapm widget */
93 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
94 const struct snd_soc_dapm_widget *_widget)
96 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
99 /* set up initial codec paths */
100 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
101 struct snd_soc_dapm_path *p, int i)
104 case snd_soc_dapm_switch:
105 case snd_soc_dapm_mixer:
106 case snd_soc_dapm_mixer_named_ctl: {
108 struct soc_mixer_control *mc = (struct soc_mixer_control *)
109 w->kcontrols[i].private_value;
110 unsigned int reg = mc->reg;
111 unsigned int shift = mc->shift;
113 unsigned int mask = (1 << fls(max)) - 1;
114 unsigned int invert = mc->invert;
116 val = snd_soc_read(w->codec, reg);
117 val = (val >> shift) & mask;
119 if ((invert && !val) || (!invert && val))
125 case snd_soc_dapm_mux: {
126 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
127 int val, item, bitmask;
129 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
131 val = snd_soc_read(w->codec, e->reg);
132 item = (val >> e->shift_l) & (bitmask - 1);
135 for (i = 0; i < e->max; i++) {
136 if (!(strcmp(p->name, e->texts[i])) && item == i)
141 case snd_soc_dapm_value_mux: {
142 struct soc_enum *e = (struct soc_enum *)
143 w->kcontrols[i].private_value;
146 val = snd_soc_read(w->codec, e->reg);
147 val = (val >> e->shift_l) & e->mask;
148 for (item = 0; item < e->max; item++) {
149 if (val == e->values[item])
154 for (i = 0; i < e->max; i++) {
155 if (!(strcmp(p->name, e->texts[i])) && item == i)
160 /* does not effect routing - always connected */
161 case snd_soc_dapm_pga:
162 case snd_soc_dapm_output:
163 case snd_soc_dapm_adc:
164 case snd_soc_dapm_input:
165 case snd_soc_dapm_dac:
166 case snd_soc_dapm_micbias:
167 case snd_soc_dapm_vmid:
170 /* does effect routing - dynamically connected */
171 case snd_soc_dapm_hp:
172 case snd_soc_dapm_mic:
173 case snd_soc_dapm_spk:
174 case snd_soc_dapm_line:
175 case snd_soc_dapm_pre:
176 case snd_soc_dapm_post:
182 /* connect mux widget to it's interconnecting audio paths */
183 static int dapm_connect_mux(struct snd_soc_codec *codec,
184 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
185 struct snd_soc_dapm_path *path, const char *control_name,
186 const struct snd_kcontrol_new *kcontrol)
188 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
191 for (i = 0; i < e->max; i++) {
192 if (!(strcmp(control_name, e->texts[i]))) {
193 list_add(&path->list, &codec->dapm_paths);
194 list_add(&path->list_sink, &dest->sources);
195 list_add(&path->list_source, &src->sinks);
196 path->name = (char*)e->texts[i];
197 dapm_set_path_status(dest, path, 0);
205 /* connect mixer widget to it's interconnecting audio paths */
206 static int dapm_connect_mixer(struct snd_soc_codec *codec,
207 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
208 struct snd_soc_dapm_path *path, const char *control_name)
212 /* search for mixer kcontrol */
213 for (i = 0; i < dest->num_kcontrols; i++) {
214 if (!strcmp(control_name, dest->kcontrols[i].name)) {
215 list_add(&path->list, &codec->dapm_paths);
216 list_add(&path->list_sink, &dest->sources);
217 list_add(&path->list_source, &src->sinks);
218 path->name = dest->kcontrols[i].name;
219 dapm_set_path_status(dest, path, i);
226 /* update dapm codec register bits */
227 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
230 unsigned short old, new;
231 struct snd_soc_codec *codec = widget->codec;
233 /* check for valid widgets */
234 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
235 widget->id == snd_soc_dapm_output ||
236 widget->id == snd_soc_dapm_hp ||
237 widget->id == snd_soc_dapm_mic ||
238 widget->id == snd_soc_dapm_line ||
239 widget->id == snd_soc_dapm_spk)
242 power = widget->power;
244 power = (power ? 0:1);
246 old = snd_soc_read(codec, widget->reg);
247 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
251 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
252 widget->name, widget->power ? "on" : "off",
254 snd_soc_write(codec, widget->reg, new);
255 pop_wait(codec->pop_time);
257 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
262 /* ramps the volume up or down to minimise pops before or after a
263 * DAPM power event */
264 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
266 const struct snd_kcontrol_new *k = widget->kcontrols;
268 if (widget->muted && !power)
270 if (!widget->muted && power)
273 if (widget->num_kcontrols && k) {
274 struct soc_mixer_control *mc =
275 (struct soc_mixer_control *)k->private_value;
276 unsigned int reg = mc->reg;
277 unsigned int shift = mc->shift;
279 unsigned int mask = (1 << fls(max)) - 1;
280 unsigned int invert = mc->invert;
284 /* power up has happended, increase volume to last level */
286 for (i = max; i > widget->saved_value; i--)
287 snd_soc_update_bits(widget->codec, reg, mask, i);
289 for (i = 0; i < widget->saved_value; i++)
290 snd_soc_update_bits(widget->codec, reg, mask, i);
294 /* power down is about to occur, decrease volume to mute */
295 int val = snd_soc_read(widget->codec, reg);
296 int i = widget->saved_value = (val >> shift) & mask;
298 for (; i < mask; i++)
299 snd_soc_update_bits(widget->codec, reg, mask, i);
302 snd_soc_update_bits(widget->codec, reg, mask, i);
310 /* create new dapm mixer control */
311 static int dapm_new_mixer(struct snd_soc_codec *codec,
312 struct snd_soc_dapm_widget *w)
316 struct snd_soc_dapm_path *path;
319 for (i = 0; i < w->num_kcontrols; i++) {
322 list_for_each_entry(path, &w->sources, list_sink) {
324 /* mixer/mux paths name must match control name */
325 if (path->name != (char*)w->kcontrols[i].name)
328 /* add dapm control with long name.
329 * for dapm_mixer this is the concatenation of the
330 * mixer and kcontrol name.
331 * for dapm_mixer_named_ctl this is simply the
334 name_len = strlen(w->kcontrols[i].name) + 1;
335 if (w->id == snd_soc_dapm_mixer)
336 name_len += 1 + strlen(w->name);
338 path->long_name = kmalloc(name_len, GFP_KERNEL);
340 if (path->long_name == NULL)
344 case snd_soc_dapm_mixer:
346 snprintf(path->long_name, name_len, "%s %s",
347 w->name, w->kcontrols[i].name);
349 case snd_soc_dapm_mixer_named_ctl:
350 snprintf(path->long_name, name_len, "%s",
351 w->kcontrols[i].name);
355 path->long_name[name_len - 1] = '\0';
357 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
359 ret = snd_ctl_add(codec->card, path->kcontrol);
361 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s\n",
363 kfree(path->long_name);
364 path->long_name = NULL;
372 /* create new dapm mux control */
373 static int dapm_new_mux(struct snd_soc_codec *codec,
374 struct snd_soc_dapm_widget *w)
376 struct snd_soc_dapm_path *path = NULL;
377 struct snd_kcontrol *kcontrol;
380 if (!w->num_kcontrols) {
381 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
385 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
386 ret = snd_ctl_add(codec->card, kcontrol);
390 list_for_each_entry(path, &w->sources, list_sink)
391 path->kcontrol = kcontrol;
396 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
400 /* create new dapm volume control */
401 static int dapm_new_pga(struct snd_soc_codec *codec,
402 struct snd_soc_dapm_widget *w)
404 struct snd_kcontrol *kcontrol;
407 if (!w->num_kcontrols)
410 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
411 ret = snd_ctl_add(codec->card, kcontrol);
413 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
420 /* reset 'walked' bit for each dapm path */
421 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
423 struct snd_soc_dapm_path *p;
425 list_for_each_entry(p, &codec->dapm_paths, list)
430 * Recursively check for a completed path to an active or physically connected
431 * output widget. Returns number of complete paths.
433 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
435 struct snd_soc_dapm_path *path;
438 if (widget->id == snd_soc_dapm_adc && widget->active)
441 if (widget->connected) {
442 /* connected pin ? */
443 if (widget->id == snd_soc_dapm_output && !widget->ext)
446 /* connected jack or spk ? */
447 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
448 widget->id == snd_soc_dapm_line)
452 list_for_each_entry(path, &widget->sinks, list_source) {
456 if (path->sink && path->connect) {
458 con += is_connected_output_ep(path->sink);
466 * Recursively check for a completed path to an active or physically connected
467 * input widget. Returns number of complete paths.
469 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
471 struct snd_soc_dapm_path *path;
474 /* active stream ? */
475 if (widget->id == snd_soc_dapm_dac && widget->active)
478 if (widget->connected) {
479 /* connected pin ? */
480 if (widget->id == snd_soc_dapm_input && !widget->ext)
483 /* connected VMID/Bias for lower pops */
484 if (widget->id == snd_soc_dapm_vmid)
487 /* connected jack ? */
488 if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line)
492 list_for_each_entry(path, &widget->sources, list_sink) {
496 if (path->source && path->connect) {
498 con += is_connected_input_ep(path->source);
506 * Handler for generic register modifier widget.
508 int dapm_reg_event(struct snd_soc_dapm_widget *w,
509 struct snd_kcontrol *kcontrol, int event)
513 if (SND_SOC_DAPM_EVENT_ON(event))
518 snd_soc_update_bits(w->codec, -(w->reg + 1),
519 w->mask << w->shift, val << w->shift);
523 EXPORT_SYMBOL_GPL(dapm_reg_event);
526 * Scan each dapm widget for complete audio path.
527 * A complete path is a route that has valid endpoints i.e.:-
529 * o DAC to output pin.
530 * o Input Pin to ADC.
531 * o Input pin to Output pin (bypass, sidetone)
532 * o DAC to ADC (loopback).
534 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
536 struct snd_soc_dapm_widget *w;
537 int in, out, i, c = 1, *seq = NULL, ret = 0, power_change, power;
539 /* do we have a sequenced stream event */
540 if (event == SND_SOC_DAPM_STREAM_START) {
541 c = ARRAY_SIZE(dapm_up_seq);
543 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
544 c = ARRAY_SIZE(dapm_down_seq);
548 for(i = 0; i < c; i++) {
549 list_for_each_entry(w, &codec->dapm_widgets, list) {
551 /* is widget in stream order */
552 if (seq && seq[i] && w->id != seq[i])
555 /* vmid - no action */
556 if (w->id == snd_soc_dapm_vmid)
560 if (w->id == snd_soc_dapm_adc && w->active) {
561 in = is_connected_input_ep(w);
562 dapm_clear_walk(w->codec);
563 w->power = (in != 0) ? 1 : 0;
569 if (w->id == snd_soc_dapm_dac && w->active) {
570 out = is_connected_output_ep(w);
571 dapm_clear_walk(w->codec);
572 w->power = (out != 0) ? 1 : 0;
577 /* pre and post event widgets */
578 if (w->id == snd_soc_dapm_pre) {
582 if (event == SND_SOC_DAPM_STREAM_START) {
584 NULL, SND_SOC_DAPM_PRE_PMU);
587 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
589 NULL, SND_SOC_DAPM_PRE_PMD);
595 if (w->id == snd_soc_dapm_post) {
599 if (event == SND_SOC_DAPM_STREAM_START) {
601 NULL, SND_SOC_DAPM_POST_PMU);
604 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
606 NULL, SND_SOC_DAPM_POST_PMD);
613 /* all other widgets */
614 in = is_connected_input_ep(w);
615 dapm_clear_walk(w->codec);
616 out = is_connected_output_ep(w);
617 dapm_clear_walk(w->codec);
618 power = (out != 0 && in != 0) ? 1 : 0;
619 power_change = (w->power == power) ? 0: 1;
625 /* call any power change event handlers */
627 pr_debug("power %s event for %s flags %x\n",
628 w->power ? "on" : "off",
629 w->name, w->event_flags);
631 /* power up pre event */
632 if (power && w->event &&
633 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
634 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
639 /* power down pre event */
640 if (!power && w->event &&
641 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
642 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
647 /* Lower PGA volume to reduce pops */
648 if (w->id == snd_soc_dapm_pga && !power)
649 dapm_set_pga(w, power);
653 /* Raise PGA volume to reduce pops */
654 if (w->id == snd_soc_dapm_pga && power)
655 dapm_set_pga(w, power);
657 /* power up post event */
658 if (power && w->event &&
659 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
661 NULL, SND_SOC_DAPM_POST_PMU);
666 /* power down post event */
667 if (!power && w->event &&
668 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
669 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
680 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
682 struct snd_soc_dapm_widget *w;
683 struct snd_soc_dapm_path *p = NULL;
686 printk("DAPM %s %s\n", codec->name, action);
688 list_for_each_entry(w, &codec->dapm_widgets, list) {
690 /* only display widgets that effect routing */
692 case snd_soc_dapm_pre:
693 case snd_soc_dapm_post:
694 case snd_soc_dapm_vmid:
696 case snd_soc_dapm_mux:
697 case snd_soc_dapm_value_mux:
698 case snd_soc_dapm_output:
699 case snd_soc_dapm_input:
700 case snd_soc_dapm_switch:
701 case snd_soc_dapm_hp:
702 case snd_soc_dapm_mic:
703 case snd_soc_dapm_spk:
704 case snd_soc_dapm_line:
705 case snd_soc_dapm_micbias:
706 case snd_soc_dapm_dac:
707 case snd_soc_dapm_adc:
708 case snd_soc_dapm_pga:
709 case snd_soc_dapm_mixer:
710 case snd_soc_dapm_mixer_named_ctl:
712 in = is_connected_input_ep(w);
713 dapm_clear_walk(w->codec);
714 out = is_connected_output_ep(w);
715 dapm_clear_walk(w->codec);
716 printk("%s: %s in %d out %d\n", w->name,
717 w->power ? "On":"Off",in, out);
719 list_for_each_entry(p, &w->sources, list_sink) {
721 printk(" in %s %s\n", p->name ? p->name : "static",
724 list_for_each_entry(p, &w->sinks, list_source) {
726 printk(" out %s %s\n", p->name ? p->name : "static",
736 /* test and update the power status of a mux widget */
737 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
738 struct snd_kcontrol *kcontrol, int mask,
739 int mux, int val, struct soc_enum *e)
741 struct snd_soc_dapm_path *path;
744 if (widget->id != snd_soc_dapm_mux &&
745 widget->id != snd_soc_dapm_value_mux)
748 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
751 /* find dapm widget path assoc with kcontrol */
752 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
753 if (path->kcontrol != kcontrol)
756 if (!path->name || !e->texts[mux])
760 /* we now need to match the string in the enum to the path */
761 if (!(strcmp(path->name, e->texts[mux])))
762 path->connect = 1; /* new connection */
764 path->connect = 0; /* old connection must be powered down */
768 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
769 dump_dapm(widget->codec, "mux power update");
775 /* test and update the power status of a mixer or switch widget */
776 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
777 struct snd_kcontrol *kcontrol, int reg,
778 int val_mask, int val, int invert)
780 struct snd_soc_dapm_path *path;
783 if (widget->id != snd_soc_dapm_mixer &&
784 widget->id != snd_soc_dapm_mixer_named_ctl &&
785 widget->id != snd_soc_dapm_switch)
788 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
791 /* find dapm widget path assoc with kcontrol */
792 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
793 if (path->kcontrol != kcontrol)
796 /* found, now check type */
800 path->connect = invert ? 0:1;
802 /* old connection must be powered down */
803 path->connect = invert ? 1:0;
808 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
809 dump_dapm(widget->codec, "mixer power update");
815 /* show dapm widget status in sys fs */
816 static ssize_t dapm_widget_show(struct device *dev,
817 struct device_attribute *attr, char *buf)
819 struct snd_soc_device *devdata = dev_get_drvdata(dev);
820 struct snd_soc_codec *codec = devdata->card->codec;
821 struct snd_soc_dapm_widget *w;
823 char *state = "not set";
825 list_for_each_entry(w, &codec->dapm_widgets, list) {
827 /* only display widgets that burnm power */
829 case snd_soc_dapm_hp:
830 case snd_soc_dapm_mic:
831 case snd_soc_dapm_spk:
832 case snd_soc_dapm_line:
833 case snd_soc_dapm_micbias:
834 case snd_soc_dapm_dac:
835 case snd_soc_dapm_adc:
836 case snd_soc_dapm_pga:
837 case snd_soc_dapm_mixer:
838 case snd_soc_dapm_mixer_named_ctl:
840 count += sprintf(buf + count, "%s: %s\n",
841 w->name, w->power ? "On":"Off");
848 switch (codec->bias_level) {
849 case SND_SOC_BIAS_ON:
852 case SND_SOC_BIAS_PREPARE:
855 case SND_SOC_BIAS_STANDBY:
858 case SND_SOC_BIAS_OFF:
862 count += sprintf(buf + count, "PM State: %s\n", state);
867 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
869 int snd_soc_dapm_sys_add(struct device *dev)
873 return device_create_file(dev, &dev_attr_dapm_widget);
876 static void snd_soc_dapm_sys_remove(struct device *dev)
879 device_remove_file(dev, &dev_attr_dapm_widget);
883 /* free all dapm widgets and resources */
884 static void dapm_free_widgets(struct snd_soc_codec *codec)
886 struct snd_soc_dapm_widget *w, *next_w;
887 struct snd_soc_dapm_path *p, *next_p;
889 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
894 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
901 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
902 const char *pin, int status)
904 struct snd_soc_dapm_widget *w;
906 list_for_each_entry(w, &codec->dapm_widgets, list) {
907 if (!strcmp(w->name, pin)) {
908 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
909 w->connected = status;
914 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
919 * snd_soc_dapm_sync - scan and power dapm paths
920 * @codec: audio codec
922 * Walks all dapm audio paths and powers widgets according to their
923 * stream or path usage.
925 * Returns 0 for success.
927 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
929 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
930 dump_dapm(codec, "sync");
933 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
935 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
936 const char *sink, const char *control, const char *source)
938 struct snd_soc_dapm_path *path;
939 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
942 /* find src and dest widgets */
943 list_for_each_entry(w, &codec->dapm_widgets, list) {
945 if (!wsink && !(strcmp(w->name, sink))) {
949 if (!wsource && !(strcmp(w->name, source))) {
954 if (wsource == NULL || wsink == NULL)
957 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
961 path->source = wsource;
963 INIT_LIST_HEAD(&path->list);
964 INIT_LIST_HEAD(&path->list_source);
965 INIT_LIST_HEAD(&path->list_sink);
967 /* check for external widgets */
968 if (wsink->id == snd_soc_dapm_input) {
969 if (wsource->id == snd_soc_dapm_micbias ||
970 wsource->id == snd_soc_dapm_mic ||
971 wsink->id == snd_soc_dapm_line ||
972 wsink->id == snd_soc_dapm_output)
975 if (wsource->id == snd_soc_dapm_output) {
976 if (wsink->id == snd_soc_dapm_spk ||
977 wsink->id == snd_soc_dapm_hp ||
978 wsink->id == snd_soc_dapm_line ||
979 wsink->id == snd_soc_dapm_input)
983 /* connect static paths */
984 if (control == NULL) {
985 list_add(&path->list, &codec->dapm_paths);
986 list_add(&path->list_sink, &wsink->sources);
987 list_add(&path->list_source, &wsource->sinks);
992 /* connect dynamic paths */
994 case snd_soc_dapm_adc:
995 case snd_soc_dapm_dac:
996 case snd_soc_dapm_pga:
997 case snd_soc_dapm_input:
998 case snd_soc_dapm_output:
999 case snd_soc_dapm_micbias:
1000 case snd_soc_dapm_vmid:
1001 case snd_soc_dapm_pre:
1002 case snd_soc_dapm_post:
1003 list_add(&path->list, &codec->dapm_paths);
1004 list_add(&path->list_sink, &wsink->sources);
1005 list_add(&path->list_source, &wsource->sinks);
1008 case snd_soc_dapm_mux:
1009 case snd_soc_dapm_value_mux:
1010 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
1011 &wsink->kcontrols[0]);
1015 case snd_soc_dapm_switch:
1016 case snd_soc_dapm_mixer:
1017 case snd_soc_dapm_mixer_named_ctl:
1018 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
1022 case snd_soc_dapm_hp:
1023 case snd_soc_dapm_mic:
1024 case snd_soc_dapm_line:
1025 case snd_soc_dapm_spk:
1026 list_add(&path->list, &codec->dapm_paths);
1027 list_add(&path->list_sink, &wsink->sources);
1028 list_add(&path->list_source, &wsource->sinks);
1035 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1042 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1044 * @route: audio routes
1045 * @num: number of routes
1047 * Connects 2 dapm widgets together via a named audio path. The sink is
1048 * the widget receiving the audio signal, whilst the source is the sender
1049 * of the audio signal.
1051 * Returns 0 for success else error. On error all resources can be freed
1052 * with a call to snd_soc_card_free().
1054 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1055 const struct snd_soc_dapm_route *route, int num)
1059 for (i = 0; i < num; i++) {
1060 ret = snd_soc_dapm_add_route(codec, route->sink,
1061 route->control, route->source);
1063 printk(KERN_ERR "Failed to add route %s->%s\n",
1073 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1076 * snd_soc_dapm_new_widgets - add new dapm widgets
1077 * @codec: audio codec
1079 * Checks the codec for any new dapm widgets and creates them if found.
1081 * Returns 0 for success.
1083 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1085 struct snd_soc_dapm_widget *w;
1087 list_for_each_entry(w, &codec->dapm_widgets, list)
1093 case snd_soc_dapm_switch:
1094 case snd_soc_dapm_mixer:
1095 case snd_soc_dapm_mixer_named_ctl:
1096 dapm_new_mixer(codec, w);
1098 case snd_soc_dapm_mux:
1099 case snd_soc_dapm_value_mux:
1100 dapm_new_mux(codec, w);
1102 case snd_soc_dapm_adc:
1103 case snd_soc_dapm_dac:
1104 case snd_soc_dapm_pga:
1105 dapm_new_pga(codec, w);
1107 case snd_soc_dapm_input:
1108 case snd_soc_dapm_output:
1109 case snd_soc_dapm_micbias:
1110 case snd_soc_dapm_spk:
1111 case snd_soc_dapm_hp:
1112 case snd_soc_dapm_mic:
1113 case snd_soc_dapm_line:
1114 case snd_soc_dapm_vmid:
1115 case snd_soc_dapm_pre:
1116 case snd_soc_dapm_post:
1122 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1125 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1128 * snd_soc_dapm_get_volsw - dapm mixer get callback
1129 * @kcontrol: mixer control
1130 * @ucontrol: control element information
1132 * Callback to get the value of a dapm mixer control.
1134 * Returns 0 for success.
1136 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1137 struct snd_ctl_elem_value *ucontrol)
1139 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1140 struct soc_mixer_control *mc =
1141 (struct soc_mixer_control *)kcontrol->private_value;
1142 unsigned int reg = mc->reg;
1143 unsigned int shift = mc->shift;
1144 unsigned int rshift = mc->rshift;
1146 unsigned int invert = mc->invert;
1147 unsigned int mask = (1 << fls(max)) - 1;
1149 /* return the saved value if we are powered down */
1150 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1151 ucontrol->value.integer.value[0] = widget->saved_value;
1155 ucontrol->value.integer.value[0] =
1156 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1157 if (shift != rshift)
1158 ucontrol->value.integer.value[1] =
1159 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1161 ucontrol->value.integer.value[0] =
1162 max - ucontrol->value.integer.value[0];
1163 if (shift != rshift)
1164 ucontrol->value.integer.value[1] =
1165 max - ucontrol->value.integer.value[1];
1170 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1173 * snd_soc_dapm_put_volsw - dapm mixer set callback
1174 * @kcontrol: mixer control
1175 * @ucontrol: control element information
1177 * Callback to set the value of a dapm mixer control.
1179 * Returns 0 for success.
1181 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1182 struct snd_ctl_elem_value *ucontrol)
1184 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1185 struct soc_mixer_control *mc =
1186 (struct soc_mixer_control *)kcontrol->private_value;
1187 unsigned int reg = mc->reg;
1188 unsigned int shift = mc->shift;
1189 unsigned int rshift = mc->rshift;
1191 unsigned int mask = (1 << fls(max)) - 1;
1192 unsigned int invert = mc->invert;
1193 unsigned short val, val2, val_mask;
1196 val = (ucontrol->value.integer.value[0] & mask);
1200 val_mask = mask << shift;
1202 if (shift != rshift) {
1203 val2 = (ucontrol->value.integer.value[1] & mask);
1206 val_mask |= mask << rshift;
1207 val |= val2 << rshift;
1210 mutex_lock(&widget->codec->mutex);
1211 widget->value = val;
1213 /* save volume value if the widget is powered down */
1214 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1215 widget->saved_value = val;
1216 mutex_unlock(&widget->codec->mutex);
1220 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1221 if (widget->event) {
1222 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1223 ret = widget->event(widget, kcontrol,
1224 SND_SOC_DAPM_PRE_REG);
1230 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1231 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1232 ret = widget->event(widget, kcontrol,
1233 SND_SOC_DAPM_POST_REG);
1235 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1238 mutex_unlock(&widget->codec->mutex);
1241 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1244 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1245 * @kcontrol: mixer control
1246 * @ucontrol: control element information
1248 * Callback to get the value of a dapm enumerated double mixer control.
1250 * Returns 0 for success.
1252 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1253 struct snd_ctl_elem_value *ucontrol)
1255 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1256 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1257 unsigned short val, bitmask;
1259 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1261 val = snd_soc_read(widget->codec, e->reg);
1262 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1263 if (e->shift_l != e->shift_r)
1264 ucontrol->value.enumerated.item[1] =
1265 (val >> e->shift_r) & (bitmask - 1);
1269 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1272 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1273 * @kcontrol: mixer control
1274 * @ucontrol: control element information
1276 * Callback to set the value of a dapm enumerated double mixer control.
1278 * Returns 0 for success.
1280 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1281 struct snd_ctl_elem_value *ucontrol)
1283 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1284 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1285 unsigned short val, mux;
1286 unsigned short mask, bitmask;
1289 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1291 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1293 mux = ucontrol->value.enumerated.item[0];
1294 val = mux << e->shift_l;
1295 mask = (bitmask - 1) << e->shift_l;
1296 if (e->shift_l != e->shift_r) {
1297 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1299 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1300 mask |= (bitmask - 1) << e->shift_r;
1303 mutex_lock(&widget->codec->mutex);
1304 widget->value = val;
1305 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1306 if (widget->event) {
1307 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1308 ret = widget->event(widget,
1309 kcontrol, SND_SOC_DAPM_PRE_REG);
1313 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1314 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1315 ret = widget->event(widget,
1316 kcontrol, SND_SOC_DAPM_POST_REG);
1318 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1321 mutex_unlock(&widget->codec->mutex);
1324 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1327 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1329 * @kcontrol: mixer control
1330 * @ucontrol: control element information
1332 * Callback to get the value of a dapm semi enumerated double mixer control.
1334 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1335 * used for handling bitfield coded enumeration for example.
1337 * Returns 0 for success.
1339 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1340 struct snd_ctl_elem_value *ucontrol)
1342 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1343 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1344 unsigned short reg_val, val, mux;
1346 reg_val = snd_soc_read(widget->codec, e->reg);
1347 val = (reg_val >> e->shift_l) & e->mask;
1348 for (mux = 0; mux < e->max; mux++) {
1349 if (val == e->values[mux])
1352 ucontrol->value.enumerated.item[0] = mux;
1353 if (e->shift_l != e->shift_r) {
1354 val = (reg_val >> e->shift_r) & e->mask;
1355 for (mux = 0; mux < e->max; mux++) {
1356 if (val == e->values[mux])
1359 ucontrol->value.enumerated.item[1] = mux;
1364 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1367 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1369 * @kcontrol: mixer control
1370 * @ucontrol: control element information
1372 * Callback to set the value of a dapm semi enumerated double mixer control.
1374 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1375 * used for handling bitfield coded enumeration for example.
1377 * Returns 0 for success.
1379 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1380 struct snd_ctl_elem_value *ucontrol)
1382 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1383 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1384 unsigned short val, mux;
1385 unsigned short mask;
1388 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1390 mux = ucontrol->value.enumerated.item[0];
1391 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1392 mask = e->mask << e->shift_l;
1393 if (e->shift_l != e->shift_r) {
1394 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1396 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1397 mask |= e->mask << e->shift_r;
1400 mutex_lock(&widget->codec->mutex);
1401 widget->value = val;
1402 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1403 if (widget->event) {
1404 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1405 ret = widget->event(widget,
1406 kcontrol, SND_SOC_DAPM_PRE_REG);
1410 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1411 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1412 ret = widget->event(widget,
1413 kcontrol, SND_SOC_DAPM_POST_REG);
1415 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1418 mutex_unlock(&widget->codec->mutex);
1421 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1424 * snd_soc_dapm_new_control - create new dapm control
1425 * @codec: audio codec
1426 * @widget: widget template
1428 * Creates a new dapm control based upon the template.
1430 * Returns 0 for success else error.
1432 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1433 const struct snd_soc_dapm_widget *widget)
1435 struct snd_soc_dapm_widget *w;
1437 if ((w = dapm_cnew_widget(widget)) == NULL)
1441 INIT_LIST_HEAD(&w->sources);
1442 INIT_LIST_HEAD(&w->sinks);
1443 INIT_LIST_HEAD(&w->list);
1444 list_add(&w->list, &codec->dapm_widgets);
1446 /* machine layer set ups unconnected pins and insertions */
1450 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1453 * snd_soc_dapm_new_controls - create new dapm controls
1454 * @codec: audio codec
1455 * @widget: widget array
1456 * @num: number of widgets
1458 * Creates new DAPM controls based upon the templates.
1460 * Returns 0 for success else error.
1462 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1463 const struct snd_soc_dapm_widget *widget,
1468 for (i = 0; i < num; i++) {
1469 ret = snd_soc_dapm_new_control(codec, widget);
1472 "ASoC: Failed to create DAPM control %s: %d\n",
1480 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1484 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1485 * @codec: audio codec
1486 * @stream: stream name
1487 * @event: stream event
1489 * Sends a stream event to the dapm core. The core then makes any
1490 * necessary widget power changes.
1492 * Returns 0 for success else error.
1494 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1495 char *stream, int event)
1497 struct snd_soc_dapm_widget *w;
1502 mutex_lock(&codec->mutex);
1503 list_for_each_entry(w, &codec->dapm_widgets, list)
1507 pr_debug("widget %s\n %s stream %s event %d\n",
1508 w->name, w->sname, stream, event);
1509 if (strstr(w->sname, stream)) {
1511 case SND_SOC_DAPM_STREAM_START:
1514 case SND_SOC_DAPM_STREAM_STOP:
1517 case SND_SOC_DAPM_STREAM_SUSPEND:
1522 case SND_SOC_DAPM_STREAM_RESUME:
1528 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
1530 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
1535 mutex_unlock(&codec->mutex);
1537 dapm_power_widgets(codec, event);
1538 dump_dapm(codec, __func__);
1541 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
1544 * snd_soc_dapm_set_bias_level - set the bias level for the system
1545 * @socdev: audio device
1546 * @level: level to configure
1548 * Configure the bias (power) levels for the SoC audio device.
1550 * Returns 0 for success else error.
1552 int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
1553 enum snd_soc_bias_level level)
1555 struct snd_soc_card *card = socdev->card;
1556 struct snd_soc_codec *codec = socdev->card->codec;
1559 if (card->set_bias_level)
1560 ret = card->set_bias_level(card, level);
1561 if (ret == 0 && codec->set_bias_level)
1562 ret = codec->set_bias_level(codec, level);
1568 * snd_soc_dapm_enable_pin - enable pin.
1572 * Enables input/output pin and it's parents or children widgets iff there is
1573 * a valid audio route and active audio stream.
1574 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1575 * do any widget power switching.
1577 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, const char *pin)
1579 return snd_soc_dapm_set_pin(codec, pin, 1);
1581 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
1584 * snd_soc_dapm_disable_pin - disable pin.
1588 * Disables input/output pin and it's parents or children widgets.
1589 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1590 * do any widget power switching.
1592 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, const char *pin)
1594 return snd_soc_dapm_set_pin(codec, pin, 0);
1596 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
1599 * snd_soc_dapm_nc_pin - permanently disable pin.
1603 * Marks the specified pin as being not connected, disabling it along
1604 * any parent or child widgets. At present this is identical to
1605 * snd_soc_dapm_disable_pin() but in future it will be extended to do
1606 * additional things such as disabling controls which only affect
1607 * paths through the pin.
1609 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1610 * do any widget power switching.
1612 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, const char *pin)
1614 return snd_soc_dapm_set_pin(codec, pin, 0);
1616 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
1619 * snd_soc_dapm_get_pin_status - get audio pin status
1620 * @codec: audio codec
1621 * @pin: audio signal pin endpoint (or start point)
1623 * Get audio pin status - connected or disconnected.
1625 * Returns 1 for connected otherwise 0.
1627 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, const char *pin)
1629 struct snd_soc_dapm_widget *w;
1631 list_for_each_entry(w, &codec->dapm_widgets, list) {
1632 if (!strcmp(w->name, pin))
1633 return w->connected;
1638 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
1641 * snd_soc_dapm_free - free dapm resources
1642 * @socdev: SoC device
1644 * Free all dapm widgets and resources.
1646 void snd_soc_dapm_free(struct snd_soc_device *socdev)
1648 struct snd_soc_codec *codec = socdev->card->codec;
1650 snd_soc_dapm_sys_remove(socdev->dev);
1651 dapm_free_widgets(codec);
1653 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
1655 /* Module information */
1656 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
1657 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1658 MODULE_LICENSE("GPL");