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_pga, snd_soc_dapm_adc, snd_soc_dapm_hp,
58 snd_soc_dapm_spk, snd_soc_dapm_post
60 static int dapm_down_seq[] = {
61 snd_soc_dapm_pre, snd_soc_dapm_adc, snd_soc_dapm_hp, snd_soc_dapm_spk,
62 snd_soc_dapm_pga, snd_soc_dapm_mixer, snd_soc_dapm_dac, snd_soc_dapm_mic,
63 snd_soc_dapm_micbias, snd_soc_dapm_mux, snd_soc_dapm_value_mux,
67 static int dapm_status = 1;
68 module_param(dapm_status, int, 0);
69 MODULE_PARM_DESC(dapm_status, "enable DPM sysfs entries");
71 static void pop_wait(u32 pop_time)
74 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
77 static void pop_dbg(u32 pop_time, const char *fmt, ...)
91 /* create a new dapm widget */
92 static inline struct snd_soc_dapm_widget *dapm_cnew_widget(
93 const struct snd_soc_dapm_widget *_widget)
95 return kmemdup(_widget, sizeof(*_widget), GFP_KERNEL);
98 /* set up initial codec paths */
99 static void dapm_set_path_status(struct snd_soc_dapm_widget *w,
100 struct snd_soc_dapm_path *p, int i)
103 case snd_soc_dapm_switch:
104 case snd_soc_dapm_mixer: {
106 struct soc_mixer_control *mc = (struct soc_mixer_control *)
107 w->kcontrols[i].private_value;
108 unsigned int reg = mc->reg;
109 unsigned int shift = mc->shift;
111 unsigned int mask = (1 << fls(max)) - 1;
112 unsigned int invert = mc->invert;
114 val = snd_soc_read(w->codec, reg);
115 val = (val >> shift) & mask;
117 if ((invert && !val) || (!invert && val))
123 case snd_soc_dapm_mux: {
124 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
125 int val, item, bitmask;
127 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
129 val = snd_soc_read(w->codec, e->reg);
130 item = (val >> e->shift_l) & (bitmask - 1);
133 for (i = 0; i < e->max; i++) {
134 if (!(strcmp(p->name, e->texts[i])) && item == i)
139 case snd_soc_dapm_value_mux: {
140 struct soc_enum *e = (struct soc_enum *)
141 w->kcontrols[i].private_value;
144 val = snd_soc_read(w->codec, e->reg);
145 val = (val >> e->shift_l) & e->mask;
146 for (item = 0; item < e->max; item++) {
147 if (val == e->values[item])
152 for (i = 0; i < e->max; i++) {
153 if (!(strcmp(p->name, e->texts[i])) && item == i)
158 /* does not effect routing - always connected */
159 case snd_soc_dapm_pga:
160 case snd_soc_dapm_output:
161 case snd_soc_dapm_adc:
162 case snd_soc_dapm_input:
163 case snd_soc_dapm_dac:
164 case snd_soc_dapm_micbias:
165 case snd_soc_dapm_vmid:
168 /* does effect routing - dynamically connected */
169 case snd_soc_dapm_hp:
170 case snd_soc_dapm_mic:
171 case snd_soc_dapm_spk:
172 case snd_soc_dapm_line:
173 case snd_soc_dapm_pre:
174 case snd_soc_dapm_post:
180 /* connect mux widget to it's interconnecting audio paths */
181 static int dapm_connect_mux(struct snd_soc_codec *codec,
182 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
183 struct snd_soc_dapm_path *path, const char *control_name,
184 const struct snd_kcontrol_new *kcontrol)
186 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
189 for (i = 0; i < e->max; i++) {
190 if (!(strcmp(control_name, e->texts[i]))) {
191 list_add(&path->list, &codec->dapm_paths);
192 list_add(&path->list_sink, &dest->sources);
193 list_add(&path->list_source, &src->sinks);
194 path->name = (char*)e->texts[i];
195 dapm_set_path_status(dest, path, 0);
203 /* connect mixer widget to it's interconnecting audio paths */
204 static int dapm_connect_mixer(struct snd_soc_codec *codec,
205 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
206 struct snd_soc_dapm_path *path, const char *control_name)
210 /* search for mixer kcontrol */
211 for (i = 0; i < dest->num_kcontrols; i++) {
212 if (!strcmp(control_name, dest->kcontrols[i].name)) {
213 list_add(&path->list, &codec->dapm_paths);
214 list_add(&path->list_sink, &dest->sources);
215 list_add(&path->list_source, &src->sinks);
216 path->name = dest->kcontrols[i].name;
217 dapm_set_path_status(dest, path, i);
224 /* update dapm codec register bits */
225 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
228 unsigned short old, new;
229 struct snd_soc_codec *codec = widget->codec;
231 /* check for valid widgets */
232 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
233 widget->id == snd_soc_dapm_output ||
234 widget->id == snd_soc_dapm_hp ||
235 widget->id == snd_soc_dapm_mic ||
236 widget->id == snd_soc_dapm_line ||
237 widget->id == snd_soc_dapm_spk)
240 power = widget->power;
242 power = (power ? 0:1);
244 old = snd_soc_read(codec, widget->reg);
245 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
249 pop_dbg(codec->pop_time, "pop test %s : %s in %d ms\n",
250 widget->name, widget->power ? "on" : "off",
252 snd_soc_write(codec, widget->reg, new);
253 pop_wait(codec->pop_time);
255 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
260 /* ramps the volume up or down to minimise pops before or after a
261 * DAPM power event */
262 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
264 const struct snd_kcontrol_new *k = widget->kcontrols;
266 if (widget->muted && !power)
268 if (!widget->muted && power)
271 if (widget->num_kcontrols && k) {
272 struct soc_mixer_control *mc =
273 (struct soc_mixer_control *)k->private_value;
274 unsigned int reg = mc->reg;
275 unsigned int shift = mc->shift;
277 unsigned int mask = (1 << fls(max)) - 1;
278 unsigned int invert = mc->invert;
282 /* power up has happended, increase volume to last level */
284 for (i = max; i > widget->saved_value; i--)
285 snd_soc_update_bits(widget->codec, reg, mask, i);
287 for (i = 0; i < widget->saved_value; i++)
288 snd_soc_update_bits(widget->codec, reg, mask, i);
292 /* power down is about to occur, decrease volume to mute */
293 int val = snd_soc_read(widget->codec, reg);
294 int i = widget->saved_value = (val >> shift) & mask;
296 for (; i < mask; i++)
297 snd_soc_update_bits(widget->codec, reg, mask, i);
300 snd_soc_update_bits(widget->codec, reg, mask, i);
308 /* create new dapm mixer control */
309 static int dapm_new_mixer(struct snd_soc_codec *codec,
310 struct snd_soc_dapm_widget *w)
314 struct snd_soc_dapm_path *path;
317 for (i = 0; i < w->num_kcontrols; i++) {
320 list_for_each_entry(path, &w->sources, list_sink) {
322 /* mixer/mux paths name must match control name */
323 if (path->name != (char*)w->kcontrols[i].name)
326 /* add dapm control with long name */
327 name_len = 2 + strlen(w->name)
328 + strlen(w->kcontrols[i].name);
329 path->long_name = kmalloc(name_len, GFP_KERNEL);
330 if (path->long_name == NULL)
333 snprintf(path->long_name, name_len, "%s %s",
334 w->name, w->kcontrols[i].name);
335 path->long_name[name_len - 1] = '\0';
337 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
339 ret = snd_ctl_add(codec->card, path->kcontrol);
341 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s\n",
343 kfree(path->long_name);
344 path->long_name = NULL;
352 /* create new dapm mux control */
353 static int dapm_new_mux(struct snd_soc_codec *codec,
354 struct snd_soc_dapm_widget *w)
356 struct snd_soc_dapm_path *path = NULL;
357 struct snd_kcontrol *kcontrol;
360 if (!w->num_kcontrols) {
361 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
365 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
366 ret = snd_ctl_add(codec->card, kcontrol);
370 list_for_each_entry(path, &w->sources, list_sink)
371 path->kcontrol = kcontrol;
376 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
380 /* create new dapm volume control */
381 static int dapm_new_pga(struct snd_soc_codec *codec,
382 struct snd_soc_dapm_widget *w)
384 struct snd_kcontrol *kcontrol;
387 if (!w->num_kcontrols)
390 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
391 ret = snd_ctl_add(codec->card, kcontrol);
393 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
400 /* reset 'walked' bit for each dapm path */
401 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
403 struct snd_soc_dapm_path *p;
405 list_for_each_entry(p, &codec->dapm_paths, list)
410 * Recursively check for a completed path to an active or physically connected
411 * output widget. Returns number of complete paths.
413 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
415 struct snd_soc_dapm_path *path;
418 if (widget->id == snd_soc_dapm_adc && widget->active)
421 if (widget->connected) {
422 /* connected pin ? */
423 if (widget->id == snd_soc_dapm_output && !widget->ext)
426 /* connected jack or spk ? */
427 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
428 widget->id == snd_soc_dapm_line)
432 list_for_each_entry(path, &widget->sinks, list_source) {
436 if (path->sink && path->connect) {
438 con += is_connected_output_ep(path->sink);
446 * Recursively check for a completed path to an active or physically connected
447 * input widget. Returns number of complete paths.
449 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
451 struct snd_soc_dapm_path *path;
454 /* active stream ? */
455 if (widget->id == snd_soc_dapm_dac && widget->active)
458 if (widget->connected) {
459 /* connected pin ? */
460 if (widget->id == snd_soc_dapm_input && !widget->ext)
463 /* connected VMID/Bias for lower pops */
464 if (widget->id == snd_soc_dapm_vmid)
467 /* connected jack ? */
468 if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line)
472 list_for_each_entry(path, &widget->sources, list_sink) {
476 if (path->source && path->connect) {
478 con += is_connected_input_ep(path->source);
486 * Handler for generic register modifier widget.
488 int dapm_reg_event(struct snd_soc_dapm_widget *w,
489 struct snd_kcontrol *kcontrol, int event)
493 if (SND_SOC_DAPM_EVENT_ON(event))
498 snd_soc_update_bits(w->codec, -(w->reg + 1),
499 w->mask << w->shift, val << w->shift);
503 EXPORT_SYMBOL_GPL(dapm_reg_event);
506 * Scan each dapm widget for complete audio path.
507 * A complete path is a route that has valid endpoints i.e.:-
509 * o DAC to output pin.
510 * o Input Pin to ADC.
511 * o Input pin to Output pin (bypass, sidetone)
512 * o DAC to ADC (loopback).
514 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
516 struct snd_soc_dapm_widget *w;
517 int in, out, i, c = 1, *seq = NULL, ret = 0, power_change, power;
519 /* do we have a sequenced stream event */
520 if (event == SND_SOC_DAPM_STREAM_START) {
521 c = ARRAY_SIZE(dapm_up_seq);
523 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
524 c = ARRAY_SIZE(dapm_down_seq);
528 for(i = 0; i < c; i++) {
529 list_for_each_entry(w, &codec->dapm_widgets, list) {
531 /* is widget in stream order */
532 if (seq && seq[i] && w->id != seq[i])
535 /* vmid - no action */
536 if (w->id == snd_soc_dapm_vmid)
540 if (w->id == snd_soc_dapm_adc && w->active) {
541 in = is_connected_input_ep(w);
542 dapm_clear_walk(w->codec);
543 w->power = (in != 0) ? 1 : 0;
549 if (w->id == snd_soc_dapm_dac && w->active) {
550 out = is_connected_output_ep(w);
551 dapm_clear_walk(w->codec);
552 w->power = (out != 0) ? 1 : 0;
557 /* pre and post event widgets */
558 if (w->id == snd_soc_dapm_pre) {
562 if (event == SND_SOC_DAPM_STREAM_START) {
564 NULL, SND_SOC_DAPM_PRE_PMU);
567 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
569 NULL, SND_SOC_DAPM_PRE_PMD);
575 if (w->id == snd_soc_dapm_post) {
579 if (event == SND_SOC_DAPM_STREAM_START) {
581 NULL, SND_SOC_DAPM_POST_PMU);
584 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
586 NULL, SND_SOC_DAPM_POST_PMD);
593 /* all other widgets */
594 in = is_connected_input_ep(w);
595 dapm_clear_walk(w->codec);
596 out = is_connected_output_ep(w);
597 dapm_clear_walk(w->codec);
598 power = (out != 0 && in != 0) ? 1 : 0;
599 power_change = (w->power == power) ? 0: 1;
605 /* call any power change event handlers */
607 pr_debug("power %s event for %s flags %x\n",
608 w->power ? "on" : "off",
609 w->name, w->event_flags);
611 /* power up pre event */
612 if (power && w->event &&
613 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
614 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
619 /* power down pre event */
620 if (!power && w->event &&
621 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
622 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
627 /* Lower PGA volume to reduce pops */
628 if (w->id == snd_soc_dapm_pga && !power)
629 dapm_set_pga(w, power);
633 /* Raise PGA volume to reduce pops */
634 if (w->id == snd_soc_dapm_pga && power)
635 dapm_set_pga(w, power);
637 /* power up post event */
638 if (power && w->event &&
639 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
641 NULL, SND_SOC_DAPM_POST_PMU);
646 /* power down post event */
647 if (!power && w->event &&
648 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
649 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
660 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
662 struct snd_soc_dapm_widget *w;
663 struct snd_soc_dapm_path *p = NULL;
666 printk("DAPM %s %s\n", codec->name, action);
668 list_for_each_entry(w, &codec->dapm_widgets, list) {
670 /* only display widgets that effect routing */
672 case snd_soc_dapm_pre:
673 case snd_soc_dapm_post:
674 case snd_soc_dapm_vmid:
676 case snd_soc_dapm_mux:
677 case snd_soc_dapm_value_mux:
678 case snd_soc_dapm_output:
679 case snd_soc_dapm_input:
680 case snd_soc_dapm_switch:
681 case snd_soc_dapm_hp:
682 case snd_soc_dapm_mic:
683 case snd_soc_dapm_spk:
684 case snd_soc_dapm_line:
685 case snd_soc_dapm_micbias:
686 case snd_soc_dapm_dac:
687 case snd_soc_dapm_adc:
688 case snd_soc_dapm_pga:
689 case snd_soc_dapm_mixer:
691 in = is_connected_input_ep(w);
692 dapm_clear_walk(w->codec);
693 out = is_connected_output_ep(w);
694 dapm_clear_walk(w->codec);
695 printk("%s: %s in %d out %d\n", w->name,
696 w->power ? "On":"Off",in, out);
698 list_for_each_entry(p, &w->sources, list_sink) {
700 printk(" in %s %s\n", p->name ? p->name : "static",
703 list_for_each_entry(p, &w->sinks, list_source) {
705 printk(" out %s %s\n", p->name ? p->name : "static",
715 /* test and update the power status of a mux widget */
716 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
717 struct snd_kcontrol *kcontrol, int mask,
718 int mux, int val, struct soc_enum *e)
720 struct snd_soc_dapm_path *path;
723 if (widget->id != snd_soc_dapm_mux)
726 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
729 /* find dapm widget path assoc with kcontrol */
730 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
731 if (path->kcontrol != kcontrol)
734 if (!path->name || !e->texts[mux])
738 /* we now need to match the string in the enum to the path */
739 if (!(strcmp(path->name, e->texts[mux])))
740 path->connect = 1; /* new connection */
742 path->connect = 0; /* old connection must be powered down */
746 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
747 dump_dapm(widget->codec, "mux power update");
753 /* test and update the power status of a mixer or switch widget */
754 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
755 struct snd_kcontrol *kcontrol, int reg,
756 int val_mask, int val, int invert)
758 struct snd_soc_dapm_path *path;
761 if (widget->id != snd_soc_dapm_mixer &&
762 widget->id != snd_soc_dapm_switch)
765 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
768 /* find dapm widget path assoc with kcontrol */
769 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
770 if (path->kcontrol != kcontrol)
773 /* found, now check type */
777 path->connect = invert ? 0:1;
779 /* old connection must be powered down */
780 path->connect = invert ? 1:0;
785 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
786 dump_dapm(widget->codec, "mixer power update");
792 /* show dapm widget status in sys fs */
793 static ssize_t dapm_widget_show(struct device *dev,
794 struct device_attribute *attr, char *buf)
796 struct snd_soc_device *devdata = dev_get_drvdata(dev);
797 struct snd_soc_codec *codec = devdata->codec;
798 struct snd_soc_dapm_widget *w;
800 char *state = "not set";
802 list_for_each_entry(w, &codec->dapm_widgets, list) {
804 /* only display widgets that burnm power */
806 case snd_soc_dapm_hp:
807 case snd_soc_dapm_mic:
808 case snd_soc_dapm_spk:
809 case snd_soc_dapm_line:
810 case snd_soc_dapm_micbias:
811 case snd_soc_dapm_dac:
812 case snd_soc_dapm_adc:
813 case snd_soc_dapm_pga:
814 case snd_soc_dapm_mixer:
816 count += sprintf(buf + count, "%s: %s\n",
817 w->name, w->power ? "On":"Off");
824 switch (codec->bias_level) {
825 case SND_SOC_BIAS_ON:
828 case SND_SOC_BIAS_PREPARE:
831 case SND_SOC_BIAS_STANDBY:
834 case SND_SOC_BIAS_OFF:
838 count += sprintf(buf + count, "PM State: %s\n", state);
843 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
845 int snd_soc_dapm_sys_add(struct device *dev)
849 return device_create_file(dev, &dev_attr_dapm_widget);
852 static void snd_soc_dapm_sys_remove(struct device *dev)
855 device_remove_file(dev, &dev_attr_dapm_widget);
859 /* free all dapm widgets and resources */
860 static void dapm_free_widgets(struct snd_soc_codec *codec)
862 struct snd_soc_dapm_widget *w, *next_w;
863 struct snd_soc_dapm_path *p, *next_p;
865 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
870 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
877 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
878 char *pin, int status)
880 struct snd_soc_dapm_widget *w;
882 list_for_each_entry(w, &codec->dapm_widgets, list) {
883 if (!strcmp(w->name, pin)) {
884 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
885 w->connected = status;
890 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
895 * snd_soc_dapm_sync - scan and power dapm paths
896 * @codec: audio codec
898 * Walks all dapm audio paths and powers widgets according to their
899 * stream or path usage.
901 * Returns 0 for success.
903 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
905 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
906 dump_dapm(codec, "sync");
909 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
911 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
912 const char *sink, const char *control, const char *source)
914 struct snd_soc_dapm_path *path;
915 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
918 /* find src and dest widgets */
919 list_for_each_entry(w, &codec->dapm_widgets, list) {
921 if (!wsink && !(strcmp(w->name, sink))) {
925 if (!wsource && !(strcmp(w->name, source))) {
930 if (wsource == NULL || wsink == NULL)
933 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
937 path->source = wsource;
939 INIT_LIST_HEAD(&path->list);
940 INIT_LIST_HEAD(&path->list_source);
941 INIT_LIST_HEAD(&path->list_sink);
943 /* check for external widgets */
944 if (wsink->id == snd_soc_dapm_input) {
945 if (wsource->id == snd_soc_dapm_micbias ||
946 wsource->id == snd_soc_dapm_mic ||
947 wsink->id == snd_soc_dapm_line ||
948 wsink->id == snd_soc_dapm_output)
951 if (wsource->id == snd_soc_dapm_output) {
952 if (wsink->id == snd_soc_dapm_spk ||
953 wsink->id == snd_soc_dapm_hp ||
954 wsink->id == snd_soc_dapm_line ||
955 wsink->id == snd_soc_dapm_input)
959 /* connect static paths */
960 if (control == NULL) {
961 list_add(&path->list, &codec->dapm_paths);
962 list_add(&path->list_sink, &wsink->sources);
963 list_add(&path->list_source, &wsource->sinks);
968 /* connect dynamic paths */
970 case snd_soc_dapm_adc:
971 case snd_soc_dapm_dac:
972 case snd_soc_dapm_pga:
973 case snd_soc_dapm_input:
974 case snd_soc_dapm_output:
975 case snd_soc_dapm_micbias:
976 case snd_soc_dapm_vmid:
977 case snd_soc_dapm_pre:
978 case snd_soc_dapm_post:
979 list_add(&path->list, &codec->dapm_paths);
980 list_add(&path->list_sink, &wsink->sources);
981 list_add(&path->list_source, &wsource->sinks);
984 case snd_soc_dapm_mux:
985 case snd_soc_dapm_value_mux:
986 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
987 &wsink->kcontrols[0]);
991 case snd_soc_dapm_switch:
992 case snd_soc_dapm_mixer:
993 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
997 case snd_soc_dapm_hp:
998 case snd_soc_dapm_mic:
999 case snd_soc_dapm_line:
1000 case snd_soc_dapm_spk:
1001 list_add(&path->list, &codec->dapm_paths);
1002 list_add(&path->list_sink, &wsink->sources);
1003 list_add(&path->list_source, &wsource->sinks);
1010 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1017 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1019 * @route: audio routes
1020 * @num: number of routes
1022 * Connects 2 dapm widgets together via a named audio path. The sink is
1023 * the widget receiving the audio signal, whilst the source is the sender
1024 * of the audio signal.
1026 * Returns 0 for success else error. On error all resources can be freed
1027 * with a call to snd_soc_card_free().
1029 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1030 const struct snd_soc_dapm_route *route, int num)
1034 for (i = 0; i < num; i++) {
1035 ret = snd_soc_dapm_add_route(codec, route->sink,
1036 route->control, route->source);
1038 printk(KERN_ERR "Failed to add route %s->%s\n",
1048 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1051 * snd_soc_dapm_new_widgets - add new dapm widgets
1052 * @codec: audio codec
1054 * Checks the codec for any new dapm widgets and creates them if found.
1056 * Returns 0 for success.
1058 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1060 struct snd_soc_dapm_widget *w;
1062 list_for_each_entry(w, &codec->dapm_widgets, list)
1068 case snd_soc_dapm_switch:
1069 case snd_soc_dapm_mixer:
1070 dapm_new_mixer(codec, w);
1072 case snd_soc_dapm_mux:
1073 case snd_soc_dapm_value_mux:
1074 dapm_new_mux(codec, w);
1076 case snd_soc_dapm_adc:
1077 case snd_soc_dapm_dac:
1078 case snd_soc_dapm_pga:
1079 dapm_new_pga(codec, w);
1081 case snd_soc_dapm_input:
1082 case snd_soc_dapm_output:
1083 case snd_soc_dapm_micbias:
1084 case snd_soc_dapm_spk:
1085 case snd_soc_dapm_hp:
1086 case snd_soc_dapm_mic:
1087 case snd_soc_dapm_line:
1088 case snd_soc_dapm_vmid:
1089 case snd_soc_dapm_pre:
1090 case snd_soc_dapm_post:
1096 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1099 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1102 * snd_soc_dapm_get_volsw - dapm mixer get callback
1103 * @kcontrol: mixer control
1104 * @ucontrol: control element information
1106 * Callback to get the value of a dapm mixer control.
1108 * Returns 0 for success.
1110 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1111 struct snd_ctl_elem_value *ucontrol)
1113 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1114 struct soc_mixer_control *mc =
1115 (struct soc_mixer_control *)kcontrol->private_value;
1116 unsigned int reg = mc->reg;
1117 unsigned int shift = mc->shift;
1118 unsigned int rshift = mc->rshift;
1120 unsigned int invert = mc->invert;
1121 unsigned int mask = (1 << fls(max)) - 1;
1123 /* return the saved value if we are powered down */
1124 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1125 ucontrol->value.integer.value[0] = widget->saved_value;
1129 ucontrol->value.integer.value[0] =
1130 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1131 if (shift != rshift)
1132 ucontrol->value.integer.value[1] =
1133 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1135 ucontrol->value.integer.value[0] =
1136 max - ucontrol->value.integer.value[0];
1137 if (shift != rshift)
1138 ucontrol->value.integer.value[1] =
1139 max - ucontrol->value.integer.value[1];
1144 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1147 * snd_soc_dapm_put_volsw - dapm mixer set callback
1148 * @kcontrol: mixer control
1149 * @ucontrol: control element information
1151 * Callback to set the value of a dapm mixer control.
1153 * Returns 0 for success.
1155 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1156 struct snd_ctl_elem_value *ucontrol)
1158 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1159 struct soc_mixer_control *mc =
1160 (struct soc_mixer_control *)kcontrol->private_value;
1161 unsigned int reg = mc->reg;
1162 unsigned int shift = mc->shift;
1163 unsigned int rshift = mc->rshift;
1165 unsigned int mask = (1 << fls(max)) - 1;
1166 unsigned int invert = mc->invert;
1167 unsigned short val, val2, val_mask;
1170 val = (ucontrol->value.integer.value[0] & mask);
1174 val_mask = mask << shift;
1176 if (shift != rshift) {
1177 val2 = (ucontrol->value.integer.value[1] & mask);
1180 val_mask |= mask << rshift;
1181 val |= val2 << rshift;
1184 mutex_lock(&widget->codec->mutex);
1185 widget->value = val;
1187 /* save volume value if the widget is powered down */
1188 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1189 widget->saved_value = val;
1190 mutex_unlock(&widget->codec->mutex);
1194 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1195 if (widget->event) {
1196 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1197 ret = widget->event(widget, kcontrol,
1198 SND_SOC_DAPM_PRE_REG);
1204 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1205 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1206 ret = widget->event(widget, kcontrol,
1207 SND_SOC_DAPM_POST_REG);
1209 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1212 mutex_unlock(&widget->codec->mutex);
1215 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1218 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1219 * @kcontrol: mixer control
1220 * @ucontrol: control element information
1222 * Callback to get the value of a dapm enumerated double mixer control.
1224 * Returns 0 for success.
1226 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1227 struct snd_ctl_elem_value *ucontrol)
1229 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1230 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1231 unsigned short val, bitmask;
1233 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1235 val = snd_soc_read(widget->codec, e->reg);
1236 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1237 if (e->shift_l != e->shift_r)
1238 ucontrol->value.enumerated.item[1] =
1239 (val >> e->shift_r) & (bitmask - 1);
1243 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1246 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1247 * @kcontrol: mixer control
1248 * @ucontrol: control element information
1250 * Callback to set the value of a dapm enumerated double mixer control.
1252 * Returns 0 for success.
1254 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1255 struct snd_ctl_elem_value *ucontrol)
1257 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1258 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1259 unsigned short val, mux;
1260 unsigned short mask, bitmask;
1263 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1265 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1267 mux = ucontrol->value.enumerated.item[0];
1268 val = mux << e->shift_l;
1269 mask = (bitmask - 1) << e->shift_l;
1270 if (e->shift_l != e->shift_r) {
1271 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1273 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1274 mask |= (bitmask - 1) << e->shift_r;
1277 mutex_lock(&widget->codec->mutex);
1278 widget->value = val;
1279 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1280 if (widget->event) {
1281 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1282 ret = widget->event(widget,
1283 kcontrol, SND_SOC_DAPM_PRE_REG);
1287 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1288 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1289 ret = widget->event(widget,
1290 kcontrol, SND_SOC_DAPM_POST_REG);
1292 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1295 mutex_unlock(&widget->codec->mutex);
1298 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1301 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1303 * @kcontrol: mixer control
1304 * @ucontrol: control element information
1306 * Callback to get the value of a dapm semi enumerated double mixer control.
1308 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1309 * used for handling bitfield coded enumeration for example.
1311 * Returns 0 for success.
1313 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol *kcontrol,
1314 struct snd_ctl_elem_value *ucontrol)
1316 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1317 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1318 unsigned short reg_val, val, mux;
1320 reg_val = snd_soc_read(widget->codec, e->reg);
1321 val = (reg_val >> e->shift_l) & e->mask;
1322 for (mux = 0; mux < e->max; mux++) {
1323 if (val == e->values[mux])
1326 ucontrol->value.enumerated.item[0] = mux;
1327 if (e->shift_l != e->shift_r) {
1328 val = (reg_val >> e->shift_r) & e->mask;
1329 for (mux = 0; mux < e->max; mux++) {
1330 if (val == e->values[mux])
1333 ucontrol->value.enumerated.item[1] = mux;
1338 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double);
1341 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1343 * @kcontrol: mixer control
1344 * @ucontrol: control element information
1346 * Callback to set the value of a dapm semi enumerated double mixer control.
1348 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1349 * used for handling bitfield coded enumeration for example.
1351 * Returns 0 for success.
1353 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol *kcontrol,
1354 struct snd_ctl_elem_value *ucontrol)
1356 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1357 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1358 unsigned short val, mux;
1359 unsigned short mask;
1362 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1364 mux = ucontrol->value.enumerated.item[0];
1365 val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
1366 mask = e->mask << e->shift_l;
1367 if (e->shift_l != e->shift_r) {
1368 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1370 val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
1371 mask |= e->mask << e->shift_r;
1374 mutex_lock(&widget->codec->mutex);
1375 widget->value = val;
1376 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1377 if (widget->event) {
1378 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1379 ret = widget->event(widget,
1380 kcontrol, SND_SOC_DAPM_PRE_REG);
1384 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1385 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1386 ret = widget->event(widget,
1387 kcontrol, SND_SOC_DAPM_POST_REG);
1389 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1392 mutex_unlock(&widget->codec->mutex);
1395 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double);
1398 * snd_soc_dapm_new_control - create new dapm control
1399 * @codec: audio codec
1400 * @widget: widget template
1402 * Creates a new dapm control based upon the template.
1404 * Returns 0 for success else error.
1406 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1407 const struct snd_soc_dapm_widget *widget)
1409 struct snd_soc_dapm_widget *w;
1411 if ((w = dapm_cnew_widget(widget)) == NULL)
1415 INIT_LIST_HEAD(&w->sources);
1416 INIT_LIST_HEAD(&w->sinks);
1417 INIT_LIST_HEAD(&w->list);
1418 list_add(&w->list, &codec->dapm_widgets);
1420 /* machine layer set ups unconnected pins and insertions */
1424 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1427 * snd_soc_dapm_new_controls - create new dapm controls
1428 * @codec: audio codec
1429 * @widget: widget array
1430 * @num: number of widgets
1432 * Creates new DAPM controls based upon the templates.
1434 * Returns 0 for success else error.
1436 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1437 const struct snd_soc_dapm_widget *widget,
1442 for (i = 0; i < num; i++) {
1443 ret = snd_soc_dapm_new_control(codec, widget);
1446 "ASoC: Failed to create DAPM control %s: %d\n",
1454 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1458 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1459 * @codec: audio codec
1460 * @stream: stream name
1461 * @event: stream event
1463 * Sends a stream event to the dapm core. The core then makes any
1464 * necessary widget power changes.
1466 * Returns 0 for success else error.
1468 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1469 char *stream, int event)
1471 struct snd_soc_dapm_widget *w;
1476 mutex_lock(&codec->mutex);
1477 list_for_each_entry(w, &codec->dapm_widgets, list)
1481 pr_debug("widget %s\n %s stream %s event %d\n",
1482 w->name, w->sname, stream, event);
1483 if (strstr(w->sname, stream)) {
1485 case SND_SOC_DAPM_STREAM_START:
1488 case SND_SOC_DAPM_STREAM_STOP:
1491 case SND_SOC_DAPM_STREAM_SUSPEND:
1496 case SND_SOC_DAPM_STREAM_RESUME:
1502 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
1504 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
1509 mutex_unlock(&codec->mutex);
1511 dapm_power_widgets(codec, event);
1512 dump_dapm(codec, __func__);
1515 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
1518 * snd_soc_dapm_set_bias_level - set the bias level for the system
1519 * @socdev: audio device
1520 * @level: level to configure
1522 * Configure the bias (power) levels for the SoC audio device.
1524 * Returns 0 for success else error.
1526 int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
1527 enum snd_soc_bias_level level)
1529 struct snd_soc_codec *codec = socdev->codec;
1530 struct snd_soc_card *card = socdev->card;
1533 if (card->set_bias_level)
1534 ret = card->set_bias_level(card, level);
1535 if (ret == 0 && codec->set_bias_level)
1536 ret = codec->set_bias_level(codec, level);
1542 * snd_soc_dapm_enable_pin - enable pin.
1546 * Enables input/output pin and it's parents or children widgets iff there is
1547 * a valid audio route and active audio stream.
1548 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1549 * do any widget power switching.
1551 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, char *pin)
1553 return snd_soc_dapm_set_pin(codec, pin, 1);
1555 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
1558 * snd_soc_dapm_disable_pin - disable pin.
1562 * Disables input/output pin and it's parents or children widgets.
1563 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1564 * do any widget power switching.
1566 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, char *pin)
1568 return snd_soc_dapm_set_pin(codec, pin, 0);
1570 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
1573 * snd_soc_dapm_nc_pin - permanently disable pin.
1577 * Marks the specified pin as being not connected, disabling it along
1578 * any parent or child widgets. At present this is identical to
1579 * snd_soc_dapm_disable_pin() but in future it will be extended to do
1580 * additional things such as disabling controls which only affect
1581 * paths through the pin.
1583 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1584 * do any widget power switching.
1586 int snd_soc_dapm_nc_pin(struct snd_soc_codec *codec, char *pin)
1588 return snd_soc_dapm_set_pin(codec, pin, 0);
1590 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin);
1593 * snd_soc_dapm_get_pin_status - get audio pin status
1594 * @codec: audio codec
1595 * @pin: audio signal pin endpoint (or start point)
1597 * Get audio pin status - connected or disconnected.
1599 * Returns 1 for connected otherwise 0.
1601 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, char *pin)
1603 struct snd_soc_dapm_widget *w;
1605 list_for_each_entry(w, &codec->dapm_widgets, list) {
1606 if (!strcmp(w->name, pin))
1607 return w->connected;
1612 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
1615 * snd_soc_dapm_free - free dapm resources
1616 * @socdev: SoC device
1618 * Free all dapm widgets and resources.
1620 void snd_soc_dapm_free(struct snd_soc_device *socdev)
1622 struct snd_soc_codec *codec = socdev->codec;
1624 snd_soc_dapm_sys_remove(socdev->dev);
1625 dapm_free_widgets(codec);
1627 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
1629 /* Module information */
1630 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
1631 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1632 MODULE_LICENSE("GPL");