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 <linux/debugfs.h>
42 #include <sound/core.h>
43 #include <sound/pcm.h>
44 #include <sound/pcm_params.h>
45 #include <sound/soc-dapm.h>
46 #include <sound/initval.h>
50 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
52 #define dump_dapm(codec, action)
55 /* dapm power sequences - make this per codec in the future */
56 static int dapm_up_seq[] = {
57 snd_soc_dapm_pre, snd_soc_dapm_micbias, snd_soc_dapm_mic,
58 snd_soc_dapm_mux, snd_soc_dapm_dac, snd_soc_dapm_mixer, snd_soc_dapm_pga,
59 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, snd_soc_dapm_dac, snd_soc_dapm_mic,
64 snd_soc_dapm_micbias, snd_soc_dapm_mux, snd_soc_dapm_post
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 struct dentry *asoc_debugfs;
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 struct soc_mixer_control *mc = (struct soc_mixer_control *)
111 w->kcontrols[i].private_value;
112 unsigned int reg = mc->reg;
113 unsigned int shift = mc->shift;
115 unsigned int mask = (1 << fls(max)) - 1;
116 unsigned int invert = mc->invert;
118 val = snd_soc_read(w->codec, reg);
119 val = (val >> shift) & mask;
121 if ((invert && !val) || (!invert && val))
127 case snd_soc_dapm_mux: {
128 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
129 int val, item, bitmask;
131 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
133 val = snd_soc_read(w->codec, e->reg);
134 item = (val >> e->shift_l) & (bitmask - 1);
137 for (i = 0; i < e->max; i++) {
138 if (!(strcmp(p->name, e->texts[i])) && item == i)
143 /* does not effect routing - always connected */
144 case snd_soc_dapm_pga:
145 case snd_soc_dapm_output:
146 case snd_soc_dapm_adc:
147 case snd_soc_dapm_input:
148 case snd_soc_dapm_dac:
149 case snd_soc_dapm_micbias:
150 case snd_soc_dapm_vmid:
153 /* does effect routing - dynamically connected */
154 case snd_soc_dapm_hp:
155 case snd_soc_dapm_mic:
156 case snd_soc_dapm_spk:
157 case snd_soc_dapm_line:
158 case snd_soc_dapm_pre:
159 case snd_soc_dapm_post:
165 /* connect mux widget to it's interconnecting audio paths */
166 static int dapm_connect_mux(struct snd_soc_codec *codec,
167 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
168 struct snd_soc_dapm_path *path, const char *control_name,
169 const struct snd_kcontrol_new *kcontrol)
171 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
174 for (i = 0; i < e->max; i++) {
175 if (!(strcmp(control_name, e->texts[i]))) {
176 list_add(&path->list, &codec->dapm_paths);
177 list_add(&path->list_sink, &dest->sources);
178 list_add(&path->list_source, &src->sinks);
179 path->name = (char*)e->texts[i];
180 dapm_set_path_status(dest, path, 0);
188 /* connect mixer widget to it's interconnecting audio paths */
189 static int dapm_connect_mixer(struct snd_soc_codec *codec,
190 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
191 struct snd_soc_dapm_path *path, const char *control_name)
195 /* search for mixer kcontrol */
196 for (i = 0; i < dest->num_kcontrols; i++) {
197 if (!strcmp(control_name, dest->kcontrols[i].name)) {
198 list_add(&path->list, &codec->dapm_paths);
199 list_add(&path->list_sink, &dest->sources);
200 list_add(&path->list_source, &src->sinks);
201 path->name = dest->kcontrols[i].name;
202 dapm_set_path_status(dest, path, i);
209 /* update dapm codec register bits */
210 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
213 unsigned short old, new;
214 struct snd_soc_codec *codec = widget->codec;
216 /* check for valid widgets */
217 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
218 widget->id == snd_soc_dapm_output ||
219 widget->id == snd_soc_dapm_hp ||
220 widget->id == snd_soc_dapm_mic ||
221 widget->id == snd_soc_dapm_line ||
222 widget->id == snd_soc_dapm_spk)
225 power = widget->power;
227 power = (power ? 0:1);
229 old = snd_soc_read(codec, widget->reg);
230 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
234 pop_dbg("pop test %s : %s in %d ms\n", widget->name,
235 widget->power ? "on" : "off", pop_time);
236 snd_soc_write(codec, widget->reg, new);
239 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
244 /* ramps the volume up or down to minimise pops before or after a
245 * DAPM power event */
246 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
248 const struct snd_kcontrol_new *k = widget->kcontrols;
250 if (widget->muted && !power)
252 if (!widget->muted && power)
255 if (widget->num_kcontrols && k) {
256 struct soc_mixer_control *mc =
257 (struct soc_mixer_control *)k->private_value;
258 unsigned int reg = mc->reg;
259 unsigned int shift = mc->shift;
261 unsigned int mask = (1 << fls(max)) - 1;
262 unsigned int invert = mc->invert;
266 /* power up has happended, increase volume to last level */
268 for (i = max; i > widget->saved_value; i--)
269 snd_soc_update_bits(widget->codec, reg, mask, i);
271 for (i = 0; i < widget->saved_value; i++)
272 snd_soc_update_bits(widget->codec, reg, mask, i);
276 /* power down is about to occur, decrease volume to mute */
277 int val = snd_soc_read(widget->codec, reg);
278 int i = widget->saved_value = (val >> shift) & mask;
280 for (; i < mask; i++)
281 snd_soc_update_bits(widget->codec, reg, mask, i);
284 snd_soc_update_bits(widget->codec, reg, mask, i);
292 /* create new dapm mixer control */
293 static int dapm_new_mixer(struct snd_soc_codec *codec,
294 struct snd_soc_dapm_widget *w)
298 struct snd_soc_dapm_path *path;
301 for (i = 0; i < w->num_kcontrols; i++) {
304 list_for_each_entry(path, &w->sources, list_sink) {
306 /* mixer/mux paths name must match control name */
307 if (path->name != (char*)w->kcontrols[i].name)
310 /* add dapm control with long name */
311 snprintf(name, 32, "%s %s", w->name, w->kcontrols[i].name);
312 path->long_name = kstrdup (name, GFP_KERNEL);
313 if (path->long_name == NULL)
316 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
318 ret = snd_ctl_add(codec->card, path->kcontrol);
320 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s\n",
322 kfree(path->long_name);
323 path->long_name = NULL;
331 /* create new dapm mux control */
332 static int dapm_new_mux(struct snd_soc_codec *codec,
333 struct snd_soc_dapm_widget *w)
335 struct snd_soc_dapm_path *path = NULL;
336 struct snd_kcontrol *kcontrol;
339 if (!w->num_kcontrols) {
340 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
344 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
345 ret = snd_ctl_add(codec->card, kcontrol);
349 list_for_each_entry(path, &w->sources, list_sink)
350 path->kcontrol = kcontrol;
355 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
359 /* create new dapm volume control */
360 static int dapm_new_pga(struct snd_soc_codec *codec,
361 struct snd_soc_dapm_widget *w)
363 struct snd_kcontrol *kcontrol;
366 if (!w->num_kcontrols)
369 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
370 ret = snd_ctl_add(codec->card, kcontrol);
372 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
379 /* reset 'walked' bit for each dapm path */
380 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
382 struct snd_soc_dapm_path *p;
384 list_for_each_entry(p, &codec->dapm_paths, list)
389 * Recursively check for a completed path to an active or physically connected
390 * output widget. Returns number of complete paths.
392 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
394 struct snd_soc_dapm_path *path;
397 if (widget->id == snd_soc_dapm_adc && widget->active)
400 if (widget->connected) {
401 /* connected pin ? */
402 if (widget->id == snd_soc_dapm_output && !widget->ext)
405 /* connected jack or spk ? */
406 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
407 widget->id == snd_soc_dapm_line)
411 list_for_each_entry(path, &widget->sinks, list_source) {
415 if (path->sink && path->connect) {
417 con += is_connected_output_ep(path->sink);
425 * Recursively check for a completed path to an active or physically connected
426 * input widget. Returns number of complete paths.
428 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
430 struct snd_soc_dapm_path *path;
433 /* active stream ? */
434 if (widget->id == snd_soc_dapm_dac && widget->active)
437 if (widget->connected) {
438 /* connected pin ? */
439 if (widget->id == snd_soc_dapm_input && !widget->ext)
442 /* connected VMID/Bias for lower pops */
443 if (widget->id == snd_soc_dapm_vmid)
446 /* connected jack ? */
447 if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line)
451 list_for_each_entry(path, &widget->sources, list_sink) {
455 if (path->source && path->connect) {
457 con += is_connected_input_ep(path->source);
465 * Handler for generic register modifier widget.
467 int dapm_reg_event(struct snd_soc_dapm_widget *w,
468 struct snd_kcontrol *kcontrol, int event)
472 if (SND_SOC_DAPM_EVENT_ON(event))
477 snd_soc_update_bits(w->codec, -(w->reg + 1),
478 w->mask << w->shift, val << w->shift);
482 EXPORT_SYMBOL_GPL(dapm_reg_event);
485 * Scan each dapm widget for complete audio path.
486 * A complete path is a route that has valid endpoints i.e.:-
488 * o DAC to output pin.
489 * o Input Pin to ADC.
490 * o Input pin to Output pin (bypass, sidetone)
491 * o DAC to ADC (loopback).
493 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
495 struct snd_soc_dapm_widget *w;
496 int in, out, i, c = 1, *seq = NULL, ret = 0, power_change, power;
498 /* do we have a sequenced stream event */
499 if (event == SND_SOC_DAPM_STREAM_START) {
500 c = ARRAY_SIZE(dapm_up_seq);
502 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
503 c = ARRAY_SIZE(dapm_down_seq);
507 for(i = 0; i < c; i++) {
508 list_for_each_entry(w, &codec->dapm_widgets, list) {
510 /* is widget in stream order */
511 if (seq && seq[i] && w->id != seq[i])
514 /* vmid - no action */
515 if (w->id == snd_soc_dapm_vmid)
519 if (w->id == snd_soc_dapm_adc && w->active) {
520 in = is_connected_input_ep(w);
521 dapm_clear_walk(w->codec);
522 w->power = (in != 0) ? 1 : 0;
528 if (w->id == snd_soc_dapm_dac && w->active) {
529 out = is_connected_output_ep(w);
530 dapm_clear_walk(w->codec);
531 w->power = (out != 0) ? 1 : 0;
536 /* pre and post event widgets */
537 if (w->id == snd_soc_dapm_pre) {
541 if (event == SND_SOC_DAPM_STREAM_START) {
543 NULL, SND_SOC_DAPM_PRE_PMU);
546 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
548 NULL, SND_SOC_DAPM_PRE_PMD);
554 if (w->id == snd_soc_dapm_post) {
558 if (event == SND_SOC_DAPM_STREAM_START) {
560 NULL, SND_SOC_DAPM_POST_PMU);
563 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
565 NULL, SND_SOC_DAPM_POST_PMD);
572 /* all other widgets */
573 in = is_connected_input_ep(w);
574 dapm_clear_walk(w->codec);
575 out = is_connected_output_ep(w);
576 dapm_clear_walk(w->codec);
577 power = (out != 0 && in != 0) ? 1 : 0;
578 power_change = (w->power == power) ? 0: 1;
584 /* call any power change event handlers */
586 pr_debug("power %s event for %s flags %x\n",
587 w->power ? "on" : "off",
588 w->name, w->event_flags);
590 /* power up pre event */
591 if (power && w->event &&
592 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
593 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
598 /* power down pre event */
599 if (!power && w->event &&
600 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
601 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
606 /* Lower PGA volume to reduce pops */
607 if (w->id == snd_soc_dapm_pga && !power)
608 dapm_set_pga(w, power);
612 /* Raise PGA volume to reduce pops */
613 if (w->id == snd_soc_dapm_pga && power)
614 dapm_set_pga(w, power);
616 /* power up post event */
617 if (power && w->event &&
618 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
620 NULL, SND_SOC_DAPM_POST_PMU);
625 /* power down post event */
626 if (!power && w->event &&
627 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
628 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
639 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
641 struct snd_soc_dapm_widget *w;
642 struct snd_soc_dapm_path *p = NULL;
645 printk("DAPM %s %s\n", codec->name, action);
647 list_for_each_entry(w, &codec->dapm_widgets, list) {
649 /* only display widgets that effect routing */
651 case snd_soc_dapm_pre:
652 case snd_soc_dapm_post:
653 case snd_soc_dapm_vmid:
655 case snd_soc_dapm_mux:
656 case snd_soc_dapm_output:
657 case snd_soc_dapm_input:
658 case snd_soc_dapm_switch:
659 case snd_soc_dapm_hp:
660 case snd_soc_dapm_mic:
661 case snd_soc_dapm_spk:
662 case snd_soc_dapm_line:
663 case snd_soc_dapm_micbias:
664 case snd_soc_dapm_dac:
665 case snd_soc_dapm_adc:
666 case snd_soc_dapm_pga:
667 case snd_soc_dapm_mixer:
669 in = is_connected_input_ep(w);
670 dapm_clear_walk(w->codec);
671 out = is_connected_output_ep(w);
672 dapm_clear_walk(w->codec);
673 printk("%s: %s in %d out %d\n", w->name,
674 w->power ? "On":"Off",in, out);
676 list_for_each_entry(p, &w->sources, list_sink) {
678 printk(" in %s %s\n", p->name ? p->name : "static",
681 list_for_each_entry(p, &w->sinks, list_source) {
683 printk(" out %s %s\n", p->name ? p->name : "static",
693 /* test and update the power status of a mux widget */
694 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
695 struct snd_kcontrol *kcontrol, int mask,
696 int mux, int val, struct soc_enum *e)
698 struct snd_soc_dapm_path *path;
701 if (widget->id != snd_soc_dapm_mux)
704 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
707 /* find dapm widget path assoc with kcontrol */
708 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
709 if (path->kcontrol != kcontrol)
712 if (!path->name || !e->texts[mux])
716 /* we now need to match the string in the enum to the path */
717 if (!(strcmp(path->name, e->texts[mux])))
718 path->connect = 1; /* new connection */
720 path->connect = 0; /* old connection must be powered down */
724 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
725 dump_dapm(widget->codec, "mux power update");
731 /* test and update the power status of a mixer or switch widget */
732 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
733 struct snd_kcontrol *kcontrol, int reg,
734 int val_mask, int val, int invert)
736 struct snd_soc_dapm_path *path;
739 if (widget->id != snd_soc_dapm_mixer &&
740 widget->id != snd_soc_dapm_switch)
743 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
746 /* find dapm widget path assoc with kcontrol */
747 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
748 if (path->kcontrol != kcontrol)
751 /* found, now check type */
755 path->connect = invert ? 0:1;
757 /* old connection must be powered down */
758 path->connect = invert ? 1:0;
763 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
764 dump_dapm(widget->codec, "mixer power update");
770 /* show dapm widget status in sys fs */
771 static ssize_t dapm_widget_show(struct device *dev,
772 struct device_attribute *attr, char *buf)
774 struct snd_soc_device *devdata = dev_get_drvdata(dev);
775 struct snd_soc_codec *codec = devdata->codec;
776 struct snd_soc_dapm_widget *w;
778 char *state = "not set";
780 list_for_each_entry(w, &codec->dapm_widgets, list) {
782 /* only display widgets that burnm power */
784 case snd_soc_dapm_hp:
785 case snd_soc_dapm_mic:
786 case snd_soc_dapm_spk:
787 case snd_soc_dapm_line:
788 case snd_soc_dapm_micbias:
789 case snd_soc_dapm_dac:
790 case snd_soc_dapm_adc:
791 case snd_soc_dapm_pga:
792 case snd_soc_dapm_mixer:
794 count += sprintf(buf + count, "%s: %s\n",
795 w->name, w->power ? "On":"Off");
802 switch (codec->bias_level) {
803 case SND_SOC_BIAS_ON:
806 case SND_SOC_BIAS_PREPARE:
809 case SND_SOC_BIAS_STANDBY:
812 case SND_SOC_BIAS_OFF:
816 count += sprintf(buf + count, "PM State: %s\n", state);
821 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
823 int snd_soc_dapm_sys_add(struct device *dev)
830 ret = device_create_file(dev, &dev_attr_dapm_widget);
834 asoc_debugfs = debugfs_create_dir("asoc", NULL);
835 if (!IS_ERR(asoc_debugfs))
836 debugfs_create_u32("dapm_pop_time", 0744, asoc_debugfs,
844 static void snd_soc_dapm_sys_remove(struct device *dev)
847 device_remove_file(dev, &dev_attr_dapm_widget);
851 debugfs_remove_recursive(asoc_debugfs);
854 /* free all dapm widgets and resources */
855 static void dapm_free_widgets(struct snd_soc_codec *codec)
857 struct snd_soc_dapm_widget *w, *next_w;
858 struct snd_soc_dapm_path *p, *next_p;
860 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
865 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
872 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
873 char *pin, int status)
875 struct snd_soc_dapm_widget *w;
877 list_for_each_entry(w, &codec->dapm_widgets, list) {
878 if (!strcmp(w->name, pin)) {
879 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
880 w->connected = status;
885 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
890 * snd_soc_dapm_sync - scan and power dapm paths
891 * @codec: audio codec
893 * Walks all dapm audio paths and powers widgets according to their
894 * stream or path usage.
896 * Returns 0 for success.
898 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
900 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
901 dump_dapm(codec, "sync");
904 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
906 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
907 const char *sink, const char *control, const char *source)
909 struct snd_soc_dapm_path *path;
910 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
913 /* find src and dest widgets */
914 list_for_each_entry(w, &codec->dapm_widgets, list) {
916 if (!wsink && !(strcmp(w->name, sink))) {
920 if (!wsource && !(strcmp(w->name, source))) {
925 if (wsource == NULL || wsink == NULL)
928 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
932 path->source = wsource;
934 INIT_LIST_HEAD(&path->list);
935 INIT_LIST_HEAD(&path->list_source);
936 INIT_LIST_HEAD(&path->list_sink);
938 /* check for external widgets */
939 if (wsink->id == snd_soc_dapm_input) {
940 if (wsource->id == snd_soc_dapm_micbias ||
941 wsource->id == snd_soc_dapm_mic ||
942 wsink->id == snd_soc_dapm_line ||
943 wsink->id == snd_soc_dapm_output)
946 if (wsource->id == snd_soc_dapm_output) {
947 if (wsink->id == snd_soc_dapm_spk ||
948 wsink->id == snd_soc_dapm_hp ||
949 wsink->id == snd_soc_dapm_line ||
950 wsink->id == snd_soc_dapm_input)
954 /* connect static paths */
955 if (control == NULL) {
956 list_add(&path->list, &codec->dapm_paths);
957 list_add(&path->list_sink, &wsink->sources);
958 list_add(&path->list_source, &wsource->sinks);
963 /* connect dynamic paths */
965 case snd_soc_dapm_adc:
966 case snd_soc_dapm_dac:
967 case snd_soc_dapm_pga:
968 case snd_soc_dapm_input:
969 case snd_soc_dapm_output:
970 case snd_soc_dapm_micbias:
971 case snd_soc_dapm_vmid:
972 case snd_soc_dapm_pre:
973 case snd_soc_dapm_post:
974 list_add(&path->list, &codec->dapm_paths);
975 list_add(&path->list_sink, &wsink->sources);
976 list_add(&path->list_source, &wsource->sinks);
979 case snd_soc_dapm_mux:
980 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
981 &wsink->kcontrols[0]);
985 case snd_soc_dapm_switch:
986 case snd_soc_dapm_mixer:
987 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
991 case snd_soc_dapm_hp:
992 case snd_soc_dapm_mic:
993 case snd_soc_dapm_line:
994 case snd_soc_dapm_spk:
995 list_add(&path->list, &codec->dapm_paths);
996 list_add(&path->list_sink, &wsink->sources);
997 list_add(&path->list_source, &wsource->sinks);
1004 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1011 * snd_soc_dapm_connect_input - connect dapm widgets
1012 * @codec: audio codec
1013 * @sink: name of target widget
1014 * @control: mixer control name
1015 * @source: name of source name
1017 * Connects 2 dapm widgets together via a named audio path. The sink is
1018 * the widget receiving the audio signal, whilst the source is the sender
1019 * of the audio signal.
1021 * This function has been deprecated in favour of snd_soc_dapm_add_routes().
1023 * Returns 0 for success else error.
1025 int snd_soc_dapm_connect_input(struct snd_soc_codec *codec, const char *sink,
1026 const char *control, const char *source)
1028 return snd_soc_dapm_add_route(codec, sink, control, source);
1030 EXPORT_SYMBOL_GPL(snd_soc_dapm_connect_input);
1033 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1035 * @route: audio routes
1036 * @num: number of routes
1038 * Connects 2 dapm widgets together via a named audio path. The sink is
1039 * the widget receiving the audio signal, whilst the source is the sender
1040 * of the audio signal.
1042 * Returns 0 for success else error. On error all resources can be freed
1043 * with a call to snd_soc_card_free().
1045 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1046 const struct snd_soc_dapm_route *route, int num)
1050 for (i = 0; i < num; i++) {
1051 ret = snd_soc_dapm_add_route(codec, route->sink,
1052 route->control, route->source);
1054 printk(KERN_ERR "Failed to add route %s->%s\n",
1064 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1067 * snd_soc_dapm_new_widgets - add new dapm widgets
1068 * @codec: audio codec
1070 * Checks the codec for any new dapm widgets and creates them if found.
1072 * Returns 0 for success.
1074 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1076 struct snd_soc_dapm_widget *w;
1078 list_for_each_entry(w, &codec->dapm_widgets, list)
1084 case snd_soc_dapm_switch:
1085 case snd_soc_dapm_mixer:
1086 dapm_new_mixer(codec, w);
1088 case snd_soc_dapm_mux:
1089 dapm_new_mux(codec, w);
1091 case snd_soc_dapm_adc:
1092 case snd_soc_dapm_dac:
1093 case snd_soc_dapm_pga:
1094 dapm_new_pga(codec, w);
1096 case snd_soc_dapm_input:
1097 case snd_soc_dapm_output:
1098 case snd_soc_dapm_micbias:
1099 case snd_soc_dapm_spk:
1100 case snd_soc_dapm_hp:
1101 case snd_soc_dapm_mic:
1102 case snd_soc_dapm_line:
1103 case snd_soc_dapm_vmid:
1104 case snd_soc_dapm_pre:
1105 case snd_soc_dapm_post:
1111 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1114 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1117 * snd_soc_dapm_get_volsw - dapm mixer get callback
1118 * @kcontrol: mixer control
1119 * @uinfo: control element information
1121 * Callback to get the value of a dapm mixer control.
1123 * Returns 0 for success.
1125 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1126 struct snd_ctl_elem_value *ucontrol)
1128 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1129 struct soc_mixer_control *mc =
1130 (struct soc_mixer_control *)kcontrol->private_value;
1131 unsigned int reg = mc->reg;
1132 unsigned int shift = mc->shift;
1133 unsigned int rshift = mc->rshift;
1135 unsigned int invert = mc->invert;
1136 unsigned int mask = (1 << fls(max)) - 1;
1138 /* return the saved value if we are powered down */
1139 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1140 ucontrol->value.integer.value[0] = widget->saved_value;
1144 ucontrol->value.integer.value[0] =
1145 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1146 if (shift != rshift)
1147 ucontrol->value.integer.value[1] =
1148 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1150 ucontrol->value.integer.value[0] =
1151 max - ucontrol->value.integer.value[0];
1152 if (shift != rshift)
1153 ucontrol->value.integer.value[1] =
1154 max - ucontrol->value.integer.value[1];
1159 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1162 * snd_soc_dapm_put_volsw - dapm mixer set callback
1163 * @kcontrol: mixer control
1164 * @uinfo: control element information
1166 * Callback to set the value of a dapm mixer control.
1168 * Returns 0 for success.
1170 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1171 struct snd_ctl_elem_value *ucontrol)
1173 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1174 struct soc_mixer_control *mc =
1175 (struct soc_mixer_control *)kcontrol->private_value;
1176 unsigned int reg = mc->reg;
1177 unsigned int shift = mc->shift;
1178 unsigned int rshift = mc->rshift;
1180 unsigned int mask = (1 << fls(max)) - 1;
1181 unsigned int invert = mc->invert;
1182 unsigned short val, val2, val_mask;
1185 val = (ucontrol->value.integer.value[0] & mask);
1189 val_mask = mask << shift;
1191 if (shift != rshift) {
1192 val2 = (ucontrol->value.integer.value[1] & mask);
1195 val_mask |= mask << rshift;
1196 val |= val2 << rshift;
1199 mutex_lock(&widget->codec->mutex);
1200 widget->value = val;
1202 /* save volume value if the widget is powered down */
1203 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1204 widget->saved_value = val;
1205 mutex_unlock(&widget->codec->mutex);
1209 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1210 if (widget->event) {
1211 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1212 ret = widget->event(widget, kcontrol,
1213 SND_SOC_DAPM_PRE_REG);
1219 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1220 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1221 ret = widget->event(widget, kcontrol,
1222 SND_SOC_DAPM_POST_REG);
1224 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1227 mutex_unlock(&widget->codec->mutex);
1230 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1233 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1234 * @kcontrol: mixer control
1235 * @uinfo: control element information
1237 * Callback to get the value of a dapm enumerated double mixer control.
1239 * Returns 0 for success.
1241 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1242 struct snd_ctl_elem_value *ucontrol)
1244 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1245 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1246 unsigned short val, bitmask;
1248 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1250 val = snd_soc_read(widget->codec, e->reg);
1251 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1252 if (e->shift_l != e->shift_r)
1253 ucontrol->value.enumerated.item[1] =
1254 (val >> e->shift_r) & (bitmask - 1);
1258 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1261 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1262 * @kcontrol: mixer control
1263 * @uinfo: control element information
1265 * Callback to set the value of a dapm enumerated double mixer control.
1267 * Returns 0 for success.
1269 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1270 struct snd_ctl_elem_value *ucontrol)
1272 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1273 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1274 unsigned short val, mux;
1275 unsigned short mask, bitmask;
1278 for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
1280 if (ucontrol->value.enumerated.item[0] > e->max - 1)
1282 mux = ucontrol->value.enumerated.item[0];
1283 val = mux << e->shift_l;
1284 mask = (bitmask - 1) << e->shift_l;
1285 if (e->shift_l != e->shift_r) {
1286 if (ucontrol->value.enumerated.item[1] > e->max - 1)
1288 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1289 mask |= (bitmask - 1) << e->shift_r;
1292 mutex_lock(&widget->codec->mutex);
1293 widget->value = val;
1294 dapm_mux_update_power(widget, kcontrol, mask, mux, val, e);
1295 if (widget->event) {
1296 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1297 ret = widget->event(widget,
1298 kcontrol, SND_SOC_DAPM_PRE_REG);
1302 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1303 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1304 ret = widget->event(widget,
1305 kcontrol, SND_SOC_DAPM_POST_REG);
1307 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1310 mutex_unlock(&widget->codec->mutex);
1313 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1316 * snd_soc_dapm_new_control - create new dapm control
1317 * @codec: audio codec
1318 * @widget: widget template
1320 * Creates a new dapm control based upon the template.
1322 * Returns 0 for success else error.
1324 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1325 const struct snd_soc_dapm_widget *widget)
1327 struct snd_soc_dapm_widget *w;
1329 if ((w = dapm_cnew_widget(widget)) == NULL)
1333 INIT_LIST_HEAD(&w->sources);
1334 INIT_LIST_HEAD(&w->sinks);
1335 INIT_LIST_HEAD(&w->list);
1336 list_add(&w->list, &codec->dapm_widgets);
1338 /* machine layer set ups unconnected pins and insertions */
1342 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1345 * snd_soc_dapm_new_controls - create new dapm controls
1346 * @codec: audio codec
1347 * @widget: widget array
1348 * @num: number of widgets
1350 * Creates new DAPM controls based upon the templates.
1352 * Returns 0 for success else error.
1354 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1355 const struct snd_soc_dapm_widget *widget,
1360 for (i = 0; i < num; i++) {
1361 ret = snd_soc_dapm_new_control(codec, widget);
1368 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1372 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1373 * @codec: audio codec
1374 * @stream: stream name
1375 * @event: stream event
1377 * Sends a stream event to the dapm core. The core then makes any
1378 * necessary widget power changes.
1380 * Returns 0 for success else error.
1382 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1383 char *stream, int event)
1385 struct snd_soc_dapm_widget *w;
1390 mutex_lock(&codec->mutex);
1391 list_for_each_entry(w, &codec->dapm_widgets, list)
1395 pr_debug("widget %s\n %s stream %s event %d\n",
1396 w->name, w->sname, stream, event);
1397 if (strstr(w->sname, stream)) {
1399 case SND_SOC_DAPM_STREAM_START:
1402 case SND_SOC_DAPM_STREAM_STOP:
1405 case SND_SOC_DAPM_STREAM_SUSPEND:
1410 case SND_SOC_DAPM_STREAM_RESUME:
1416 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
1418 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
1423 mutex_unlock(&codec->mutex);
1425 dapm_power_widgets(codec, event);
1426 dump_dapm(codec, __func__);
1429 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
1432 * snd_soc_dapm_set_bias_level - set the bias level for the system
1433 * @socdev: audio device
1434 * @level: level to configure
1436 * Configure the bias (power) levels for the SoC audio device.
1438 * Returns 0 for success else error.
1440 int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
1441 enum snd_soc_bias_level level)
1443 struct snd_soc_codec *codec = socdev->codec;
1444 struct snd_soc_machine *machine = socdev->machine;
1447 if (machine->set_bias_level)
1448 ret = machine->set_bias_level(machine, level);
1449 if (ret == 0 && codec->set_bias_level)
1450 ret = codec->set_bias_level(codec, level);
1456 * snd_soc_dapm_enable_pin - enable pin.
1457 * @snd_soc_codec: SoC codec
1460 * Enables input/output pin and it's parents or children widgets iff there is
1461 * a valid audio route and active audio stream.
1462 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1463 * do any widget power switching.
1465 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, char *pin)
1467 return snd_soc_dapm_set_pin(codec, pin, 1);
1469 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
1472 * snd_soc_dapm_disable_pin - disable pin.
1476 * Disables input/output pin and it's parents or children widgets.
1477 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1478 * do any widget power switching.
1480 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, char *pin)
1482 return snd_soc_dapm_set_pin(codec, pin, 0);
1484 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
1487 * snd_soc_dapm_get_pin_status - get audio pin status
1488 * @codec: audio codec
1489 * @pin: audio signal pin endpoint (or start point)
1491 * Get audio pin status - connected or disconnected.
1493 * Returns 1 for connected otherwise 0.
1495 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, char *pin)
1497 struct snd_soc_dapm_widget *w;
1499 list_for_each_entry(w, &codec->dapm_widgets, list) {
1500 if (!strcmp(w->name, pin))
1501 return w->connected;
1506 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
1509 * snd_soc_dapm_free - free dapm resources
1510 * @socdev: SoC device
1512 * Free all dapm widgets and resources.
1514 void snd_soc_dapm_free(struct snd_soc_device *socdev)
1516 struct snd_soc_codec *codec = socdev->codec;
1518 snd_soc_dapm_sys_remove(socdev->dev);
1519 dapm_free_widgets(codec);
1521 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
1523 /* Module information */
1524 MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com");
1525 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1526 MODULE_LICENSE("GPL");