2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood
6 * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
14 * o Changes power status of internal codec blocks depending on the
15 * dynamic configuration of codec internal audio paths and active
17 * o Platform power domain - can support external components i.e. amps and
18 * mic/meadphone insertion events.
19 * o Automatic Mic Bias support
20 * o Jack insertion power event initiation - e.g. hp insertion will enable
22 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
26 * o DAPM power change sequencing - allow for configurable per
28 * o Support for analogue bias optimisation.
29 * o Support for reduced codec oversampling rates.
30 * o Support for reduced codec bias currents.
33 #include <linux/module.h>
34 #include <linux/moduleparam.h>
35 #include <linux/init.h>
36 #include <linux/delay.h>
38 #include <linux/bitops.h>
39 #include <linux/platform_device.h>
40 #include <linux/jiffies.h>
41 #include <sound/core.h>
42 #include <sound/pcm.h>
43 #include <sound/pcm_params.h>
44 #include <sound/soc-dapm.h>
45 #include <sound/initval.h>
49 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
51 #define dump_dapm(codec, action)
54 /* dapm power sequences - make this per codec in the future */
55 static int dapm_up_seq[] = {
56 snd_soc_dapm_pre, snd_soc_dapm_micbias, snd_soc_dapm_mic,
57 snd_soc_dapm_mux, snd_soc_dapm_dac, snd_soc_dapm_mixer, snd_soc_dapm_pga,
58 snd_soc_dapm_adc, snd_soc_dapm_hp, 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_post
66 static int dapm_status = 1;
67 module_param(dapm_status, int, 0);
68 MODULE_PARM_DESC(dapm_status, "enable DPM sysfs entries");
70 static unsigned int pop_time;
72 static void pop_wait(void)
75 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time));
78 static void pop_dbg(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: {
107 int reg = w->kcontrols[i].private_value & 0xff;
108 int shift = (w->kcontrols[i].private_value >> 8) & 0x0f;
109 int mask = (w->kcontrols[i].private_value >> 16) & 0xff;
110 int invert = (w->kcontrols[i].private_value >> 24) & 0x01;
112 val = snd_soc_read(w->codec, reg);
113 val = (val >> shift) & mask;
115 if ((invert && !val) || (!invert && val))
121 case snd_soc_dapm_mux: {
122 struct soc_enum *e = (struct soc_enum *)w->kcontrols[i].private_value;
123 int val, item, bitmask;
125 for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
127 val = snd_soc_read(w->codec, e->reg);
128 item = (val >> e->shift_l) & (bitmask - 1);
131 for (i = 0; i < e->mask; i++) {
132 if (!(strcmp(p->name, e->texts[i])) && item == i)
137 /* does not effect routing - always connected */
138 case snd_soc_dapm_pga:
139 case snd_soc_dapm_output:
140 case snd_soc_dapm_adc:
141 case snd_soc_dapm_input:
142 case snd_soc_dapm_dac:
143 case snd_soc_dapm_micbias:
144 case snd_soc_dapm_vmid:
147 /* does effect routing - dynamically connected */
148 case snd_soc_dapm_hp:
149 case snd_soc_dapm_mic:
150 case snd_soc_dapm_spk:
151 case snd_soc_dapm_line:
152 case snd_soc_dapm_pre:
153 case snd_soc_dapm_post:
159 /* connect mux widget to it's interconnecting audio paths */
160 static int dapm_connect_mux(struct snd_soc_codec *codec,
161 struct snd_soc_dapm_widget *src, struct snd_soc_dapm_widget *dest,
162 struct snd_soc_dapm_path *path, const char *control_name,
163 const struct snd_kcontrol_new *kcontrol)
165 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
168 for (i = 0; i < e->mask; i++) {
169 if (!(strcmp(control_name, e->texts[i]))) {
170 list_add(&path->list, &codec->dapm_paths);
171 list_add(&path->list_sink, &dest->sources);
172 list_add(&path->list_source, &src->sinks);
173 path->name = (char*)e->texts[i];
174 dapm_set_path_status(dest, path, 0);
182 /* connect mixer widget to it's interconnecting audio paths */
183 static int dapm_connect_mixer(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)
189 /* search for mixer kcontrol */
190 for (i = 0; i < dest->num_kcontrols; i++) {
191 if (!strcmp(control_name, dest->kcontrols[i].name)) {
192 list_add(&path->list, &codec->dapm_paths);
193 list_add(&path->list_sink, &dest->sources);
194 list_add(&path->list_source, &src->sinks);
195 path->name = dest->kcontrols[i].name;
196 dapm_set_path_status(dest, path, i);
203 /* update dapm codec register bits */
204 static int dapm_update_bits(struct snd_soc_dapm_widget *widget)
207 unsigned short old, new;
208 struct snd_soc_codec *codec = widget->codec;
210 /* check for valid widgets */
211 if (widget->reg < 0 || widget->id == snd_soc_dapm_input ||
212 widget->id == snd_soc_dapm_output ||
213 widget->id == snd_soc_dapm_hp ||
214 widget->id == snd_soc_dapm_mic ||
215 widget->id == snd_soc_dapm_line ||
216 widget->id == snd_soc_dapm_spk)
219 power = widget->power;
221 power = (power ? 0:1);
223 old = snd_soc_read(codec, widget->reg);
224 new = (old & ~(0x1 << widget->shift)) | (power << widget->shift);
228 pop_dbg("pop test %s : %s in %d ms\n", widget->name,
229 widget->power ? "on" : "off", pop_time);
230 snd_soc_write(codec, widget->reg, new);
233 pr_debug("reg %x old %x new %x change %d\n", widget->reg,
238 /* ramps the volume up or down to minimise pops before or after a
239 * DAPM power event */
240 static int dapm_set_pga(struct snd_soc_dapm_widget *widget, int power)
242 const struct snd_kcontrol_new *k = widget->kcontrols;
244 if (widget->muted && !power)
246 if (!widget->muted && power)
249 if (widget->num_kcontrols && k) {
250 int reg = k->private_value & 0xff;
251 int shift = (k->private_value >> 8) & 0x0f;
252 int mask = (k->private_value >> 16) & 0xff;
253 int invert = (k->private_value >> 24) & 0x01;
257 /* power up has happended, increase volume to last level */
259 for (i = mask; i > widget->saved_value; i--)
260 snd_soc_update_bits(widget->codec, reg, mask, i);
262 for (i = 0; i < widget->saved_value; i++)
263 snd_soc_update_bits(widget->codec, reg, mask, i);
267 /* power down is about to occur, decrease volume to mute */
268 int val = snd_soc_read(widget->codec, reg);
269 int i = widget->saved_value = (val >> shift) & mask;
271 for (; i < mask; i++)
272 snd_soc_update_bits(widget->codec, reg, mask, i);
275 snd_soc_update_bits(widget->codec, reg, mask, i);
283 /* create new dapm mixer control */
284 static int dapm_new_mixer(struct snd_soc_codec *codec,
285 struct snd_soc_dapm_widget *w)
289 struct snd_soc_dapm_path *path;
292 for (i = 0; i < w->num_kcontrols; i++) {
295 list_for_each_entry(path, &w->sources, list_sink) {
297 /* mixer/mux paths name must match control name */
298 if (path->name != (char*)w->kcontrols[i].name)
301 /* add dapm control with long name */
302 snprintf(name, 32, "%s %s", w->name, w->kcontrols[i].name);
303 path->long_name = kstrdup (name, GFP_KERNEL);
304 if (path->long_name == NULL)
307 path->kcontrol = snd_soc_cnew(&w->kcontrols[i], w,
309 ret = snd_ctl_add(codec->card, path->kcontrol);
311 printk(KERN_ERR "asoc: failed to add dapm kcontrol %s\n",
313 kfree(path->long_name);
314 path->long_name = NULL;
322 /* create new dapm mux control */
323 static int dapm_new_mux(struct snd_soc_codec *codec,
324 struct snd_soc_dapm_widget *w)
326 struct snd_soc_dapm_path *path = NULL;
327 struct snd_kcontrol *kcontrol;
330 if (!w->num_kcontrols) {
331 printk(KERN_ERR "asoc: mux %s has no controls\n", w->name);
335 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
336 ret = snd_ctl_add(codec->card, kcontrol);
340 list_for_each_entry(path, &w->sources, list_sink)
341 path->kcontrol = kcontrol;
346 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
350 /* create new dapm volume control */
351 static int dapm_new_pga(struct snd_soc_codec *codec,
352 struct snd_soc_dapm_widget *w)
354 struct snd_kcontrol *kcontrol;
357 if (!w->num_kcontrols)
360 kcontrol = snd_soc_cnew(&w->kcontrols[0], w, w->name);
361 ret = snd_ctl_add(codec->card, kcontrol);
363 printk(KERN_ERR "asoc: failed to add kcontrol %s\n", w->name);
370 /* reset 'walked' bit for each dapm path */
371 static inline void dapm_clear_walk(struct snd_soc_codec *codec)
373 struct snd_soc_dapm_path *p;
375 list_for_each_entry(p, &codec->dapm_paths, list)
380 * Recursively check for a completed path to an active or physically connected
381 * output widget. Returns number of complete paths.
383 static int is_connected_output_ep(struct snd_soc_dapm_widget *widget)
385 struct snd_soc_dapm_path *path;
388 if (widget->id == snd_soc_dapm_adc && widget->active)
391 if (widget->connected) {
392 /* connected pin ? */
393 if (widget->id == snd_soc_dapm_output && !widget->ext)
396 /* connected jack or spk ? */
397 if (widget->id == snd_soc_dapm_hp || widget->id == snd_soc_dapm_spk ||
398 widget->id == snd_soc_dapm_line)
402 list_for_each_entry(path, &widget->sinks, list_source) {
406 if (path->sink && path->connect) {
408 con += is_connected_output_ep(path->sink);
416 * Recursively check for a completed path to an active or physically connected
417 * input widget. Returns number of complete paths.
419 static int is_connected_input_ep(struct snd_soc_dapm_widget *widget)
421 struct snd_soc_dapm_path *path;
424 /* active stream ? */
425 if (widget->id == snd_soc_dapm_dac && widget->active)
428 if (widget->connected) {
429 /* connected pin ? */
430 if (widget->id == snd_soc_dapm_input && !widget->ext)
433 /* connected VMID/Bias for lower pops */
434 if (widget->id == snd_soc_dapm_vmid)
437 /* connected jack ? */
438 if (widget->id == snd_soc_dapm_mic || widget->id == snd_soc_dapm_line)
442 list_for_each_entry(path, &widget->sources, list_sink) {
446 if (path->source && path->connect) {
448 con += is_connected_input_ep(path->source);
456 * Handler for generic register modifier widget.
458 int dapm_reg_event(struct snd_soc_dapm_widget *w,
459 struct snd_kcontrol *kcontrol, int event)
463 if (SND_SOC_DAPM_EVENT_ON(event))
468 snd_soc_update_bits(w->codec, -(w->reg + 1),
469 w->mask << w->shift, val << w->shift);
473 EXPORT_SYMBOL_GPL(dapm_reg_event);
476 * Scan each dapm widget for complete audio path.
477 * A complete path is a route that has valid endpoints i.e.:-
479 * o DAC to output pin.
480 * o Input Pin to ADC.
481 * o Input pin to Output pin (bypass, sidetone)
482 * o DAC to ADC (loopback).
484 static int dapm_power_widgets(struct snd_soc_codec *codec, int event)
486 struct snd_soc_dapm_widget *w;
487 int in, out, i, c = 1, *seq = NULL, ret = 0, power_change, power;
489 /* do we have a sequenced stream event */
490 if (event == SND_SOC_DAPM_STREAM_START) {
491 c = ARRAY_SIZE(dapm_up_seq);
493 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
494 c = ARRAY_SIZE(dapm_down_seq);
498 for(i = 0; i < c; i++) {
499 list_for_each_entry(w, &codec->dapm_widgets, list) {
501 /* is widget in stream order */
502 if (seq && seq[i] && w->id != seq[i])
505 /* vmid - no action */
506 if (w->id == snd_soc_dapm_vmid)
510 if (w->id == snd_soc_dapm_adc && w->active) {
511 in = is_connected_input_ep(w);
512 dapm_clear_walk(w->codec);
513 w->power = (in != 0) ? 1 : 0;
519 if (w->id == snd_soc_dapm_dac && w->active) {
520 out = is_connected_output_ep(w);
521 dapm_clear_walk(w->codec);
522 w->power = (out != 0) ? 1 : 0;
527 /* pre and post event widgets */
528 if (w->id == snd_soc_dapm_pre) {
532 if (event == SND_SOC_DAPM_STREAM_START) {
534 NULL, SND_SOC_DAPM_PRE_PMU);
537 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
539 NULL, SND_SOC_DAPM_PRE_PMD);
545 if (w->id == snd_soc_dapm_post) {
549 if (event == SND_SOC_DAPM_STREAM_START) {
551 NULL, SND_SOC_DAPM_POST_PMU);
554 } else if (event == SND_SOC_DAPM_STREAM_STOP) {
556 NULL, SND_SOC_DAPM_POST_PMD);
563 /* all other widgets */
564 in = is_connected_input_ep(w);
565 dapm_clear_walk(w->codec);
566 out = is_connected_output_ep(w);
567 dapm_clear_walk(w->codec);
568 power = (out != 0 && in != 0) ? 1 : 0;
569 power_change = (w->power == power) ? 0: 1;
575 /* call any power change event handlers */
577 pr_debug("power %s event for %s flags %x\n",
578 w->power ? "on" : "off",
579 w->name, w->event_flags);
581 /* power up pre event */
582 if (power && w->event &&
583 (w->event_flags & SND_SOC_DAPM_PRE_PMU)) {
584 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMU);
589 /* power down pre event */
590 if (!power && w->event &&
591 (w->event_flags & SND_SOC_DAPM_PRE_PMD)) {
592 ret = w->event(w, NULL, SND_SOC_DAPM_PRE_PMD);
597 /* Lower PGA volume to reduce pops */
598 if (w->id == snd_soc_dapm_pga && !power)
599 dapm_set_pga(w, power);
603 /* Raise PGA volume to reduce pops */
604 if (w->id == snd_soc_dapm_pga && power)
605 dapm_set_pga(w, power);
607 /* power up post event */
608 if (power && w->event &&
609 (w->event_flags & SND_SOC_DAPM_POST_PMU)) {
611 NULL, SND_SOC_DAPM_POST_PMU);
616 /* power down post event */
617 if (!power && w->event &&
618 (w->event_flags & SND_SOC_DAPM_POST_PMD)) {
619 ret = w->event(w, NULL, SND_SOC_DAPM_POST_PMD);
630 static void dbg_dump_dapm(struct snd_soc_codec* codec, const char *action)
632 struct snd_soc_dapm_widget *w;
633 struct snd_soc_dapm_path *p = NULL;
636 printk("DAPM %s %s\n", codec->name, action);
638 list_for_each_entry(w, &codec->dapm_widgets, list) {
640 /* only display widgets that effect routing */
642 case snd_soc_dapm_pre:
643 case snd_soc_dapm_post:
644 case snd_soc_dapm_vmid:
646 case snd_soc_dapm_mux:
647 case snd_soc_dapm_output:
648 case snd_soc_dapm_input:
649 case snd_soc_dapm_switch:
650 case snd_soc_dapm_hp:
651 case snd_soc_dapm_mic:
652 case snd_soc_dapm_spk:
653 case snd_soc_dapm_line:
654 case snd_soc_dapm_micbias:
655 case snd_soc_dapm_dac:
656 case snd_soc_dapm_adc:
657 case snd_soc_dapm_pga:
658 case snd_soc_dapm_mixer:
660 in = is_connected_input_ep(w);
661 dapm_clear_walk(w->codec);
662 out = is_connected_output_ep(w);
663 dapm_clear_walk(w->codec);
664 printk("%s: %s in %d out %d\n", w->name,
665 w->power ? "On":"Off",in, out);
667 list_for_each_entry(p, &w->sources, list_sink) {
669 printk(" in %s %s\n", p->name ? p->name : "static",
672 list_for_each_entry(p, &w->sinks, list_source) {
674 printk(" out %s %s\n", p->name ? p->name : "static",
684 /* test and update the power status of a mux widget */
685 static int dapm_mux_update_power(struct snd_soc_dapm_widget *widget,
686 struct snd_kcontrol *kcontrol, int mask,
687 int val, struct soc_enum* e)
689 struct snd_soc_dapm_path *path;
692 if (widget->id != snd_soc_dapm_mux)
695 if (!snd_soc_test_bits(widget->codec, e->reg, mask, val))
698 /* find dapm widget path assoc with kcontrol */
699 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
700 if (path->kcontrol != kcontrol)
703 if (!path->name || ! e->texts[val])
707 /* we now need to match the string in the enum to the path */
708 if (!(strcmp(path->name, e->texts[val])))
709 path->connect = 1; /* new connection */
711 path->connect = 0; /* old connection must be powered down */
715 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
716 dump_dapm(widget->codec, "mux power update");
722 /* test and update the power status of a mixer or switch widget */
723 static int dapm_mixer_update_power(struct snd_soc_dapm_widget *widget,
724 struct snd_kcontrol *kcontrol, int reg,
725 int val_mask, int val, int invert)
727 struct snd_soc_dapm_path *path;
730 if (widget->id != snd_soc_dapm_mixer &&
731 widget->id != snd_soc_dapm_switch)
734 if (!snd_soc_test_bits(widget->codec, reg, val_mask, val))
737 /* find dapm widget path assoc with kcontrol */
738 list_for_each_entry(path, &widget->codec->dapm_paths, list) {
739 if (path->kcontrol != kcontrol)
742 /* found, now check type */
746 path->connect = invert ? 0:1;
748 /* old connection must be powered down */
749 path->connect = invert ? 1:0;
754 dapm_power_widgets(widget->codec, SND_SOC_DAPM_STREAM_NOP);
755 dump_dapm(widget->codec, "mixer power update");
761 /* show dapm widget status in sys fs */
762 static ssize_t dapm_widget_show(struct device *dev,
763 struct device_attribute *attr, char *buf)
765 struct snd_soc_device *devdata = dev_get_drvdata(dev);
766 struct snd_soc_codec *codec = devdata->codec;
767 struct snd_soc_dapm_widget *w;
769 char *state = "not set";
771 list_for_each_entry(w, &codec->dapm_widgets, list) {
773 /* only display widgets that burnm power */
775 case snd_soc_dapm_hp:
776 case snd_soc_dapm_mic:
777 case snd_soc_dapm_spk:
778 case snd_soc_dapm_line:
779 case snd_soc_dapm_micbias:
780 case snd_soc_dapm_dac:
781 case snd_soc_dapm_adc:
782 case snd_soc_dapm_pga:
783 case snd_soc_dapm_mixer:
785 count += sprintf(buf + count, "%s: %s\n",
786 w->name, w->power ? "On":"Off");
793 switch (codec->bias_level) {
794 case SND_SOC_BIAS_ON:
797 case SND_SOC_BIAS_PREPARE:
800 case SND_SOC_BIAS_STANDBY:
803 case SND_SOC_BIAS_OFF:
807 count += sprintf(buf + count, "PM State: %s\n", state);
812 static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
814 /* pop/click delay times */
815 static ssize_t dapm_pop_time_show(struct device *dev,
816 struct device_attribute *attr, char *buf)
818 return sprintf(buf, "%d\n", pop_time);
821 static ssize_t dapm_pop_time_store(struct device *dev,
822 struct device_attribute *attr,
823 const char *buf, size_t count)
828 if (strict_strtoul(buf, 10, &val) >= 0)
831 printk(KERN_ERR "Unable to parse pop_time setting\n");
836 static DEVICE_ATTR(dapm_pop_time, 0744, dapm_pop_time_show,
837 dapm_pop_time_store);
839 int snd_soc_dapm_sys_add(struct device *dev)
844 ret = device_create_file(dev, &dev_attr_dapm_widget);
847 ret = device_create_file(dev, &dev_attr_dapm_pop_time);
853 static void snd_soc_dapm_sys_remove(struct device *dev)
856 device_remove_file(dev, &dev_attr_dapm_pop_time);
857 device_remove_file(dev, &dev_attr_dapm_widget);
861 /* free all dapm widgets and resources */
862 static void dapm_free_widgets(struct snd_soc_codec *codec)
864 struct snd_soc_dapm_widget *w, *next_w;
865 struct snd_soc_dapm_path *p, *next_p;
867 list_for_each_entry_safe(w, next_w, &codec->dapm_widgets, list) {
872 list_for_each_entry_safe(p, next_p, &codec->dapm_paths, list) {
879 static int snd_soc_dapm_set_pin(struct snd_soc_codec *codec,
880 char *pin, int status)
882 struct snd_soc_dapm_widget *w;
884 list_for_each_entry(w, &codec->dapm_widgets, list) {
885 if (!strcmp(w->name, pin)) {
886 pr_debug("dapm: %s: pin %s\n", codec->name, pin);
887 w->connected = status;
892 pr_err("dapm: %s: configuring unknown pin %s\n", codec->name, pin);
897 * snd_soc_dapm_sync - scan and power dapm paths
898 * @codec: audio codec
900 * Walks all dapm audio paths and powers widgets according to their
901 * stream or path usage.
903 * Returns 0 for success.
905 int snd_soc_dapm_sync(struct snd_soc_codec *codec)
907 int ret = dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
908 dump_dapm(codec, "sync");
911 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync);
913 static int snd_soc_dapm_add_route(struct snd_soc_codec *codec,
914 const char *sink, const char *control, const char *source)
916 struct snd_soc_dapm_path *path;
917 struct snd_soc_dapm_widget *wsource = NULL, *wsink = NULL, *w;
920 /* find src and dest widgets */
921 list_for_each_entry(w, &codec->dapm_widgets, list) {
923 if (!wsink && !(strcmp(w->name, sink))) {
927 if (!wsource && !(strcmp(w->name, source))) {
932 if (wsource == NULL || wsink == NULL)
935 path = kzalloc(sizeof(struct snd_soc_dapm_path), GFP_KERNEL);
939 path->source = wsource;
941 INIT_LIST_HEAD(&path->list);
942 INIT_LIST_HEAD(&path->list_source);
943 INIT_LIST_HEAD(&path->list_sink);
945 /* check for external widgets */
946 if (wsink->id == snd_soc_dapm_input) {
947 if (wsource->id == snd_soc_dapm_micbias ||
948 wsource->id == snd_soc_dapm_mic ||
949 wsink->id == snd_soc_dapm_line ||
950 wsink->id == snd_soc_dapm_output)
953 if (wsource->id == snd_soc_dapm_output) {
954 if (wsink->id == snd_soc_dapm_spk ||
955 wsink->id == snd_soc_dapm_hp ||
956 wsink->id == snd_soc_dapm_line ||
957 wsink->id == snd_soc_dapm_input)
961 /* connect static paths */
962 if (control == NULL) {
963 list_add(&path->list, &codec->dapm_paths);
964 list_add(&path->list_sink, &wsink->sources);
965 list_add(&path->list_source, &wsource->sinks);
970 /* connect dynamic paths */
972 case snd_soc_dapm_adc:
973 case snd_soc_dapm_dac:
974 case snd_soc_dapm_pga:
975 case snd_soc_dapm_input:
976 case snd_soc_dapm_output:
977 case snd_soc_dapm_micbias:
978 case snd_soc_dapm_vmid:
979 case snd_soc_dapm_pre:
980 case snd_soc_dapm_post:
981 list_add(&path->list, &codec->dapm_paths);
982 list_add(&path->list_sink, &wsink->sources);
983 list_add(&path->list_source, &wsource->sinks);
986 case snd_soc_dapm_mux:
987 ret = dapm_connect_mux(codec, wsource, wsink, path, control,
988 &wsink->kcontrols[0]);
992 case snd_soc_dapm_switch:
993 case snd_soc_dapm_mixer:
994 ret = dapm_connect_mixer(codec, wsource, wsink, path, control);
998 case snd_soc_dapm_hp:
999 case snd_soc_dapm_mic:
1000 case snd_soc_dapm_line:
1001 case snd_soc_dapm_spk:
1002 list_add(&path->list, &codec->dapm_paths);
1003 list_add(&path->list_sink, &wsink->sources);
1004 list_add(&path->list_source, &wsource->sinks);
1011 printk(KERN_WARNING "asoc: no dapm match for %s --> %s --> %s\n", source,
1018 * snd_soc_dapm_connect_input - connect dapm widgets
1019 * @codec: audio codec
1020 * @sink: name of target widget
1021 * @control: mixer control name
1022 * @source: name of source name
1024 * Connects 2 dapm widgets together via a named audio path. The sink is
1025 * the widget receiving the audio signal, whilst the source is the sender
1026 * of the audio signal.
1028 * This function has been deprecated in favour of snd_soc_dapm_add_routes().
1030 * Returns 0 for success else error.
1032 int snd_soc_dapm_connect_input(struct snd_soc_codec *codec, const char *sink,
1033 const char *control, const char *source)
1035 return snd_soc_dapm_add_route(codec, sink, control, source);
1037 EXPORT_SYMBOL_GPL(snd_soc_dapm_connect_input);
1040 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1042 * @route: audio routes
1043 * @num: number of routes
1045 * Connects 2 dapm widgets together via a named audio path. The sink is
1046 * the widget receiving the audio signal, whilst the source is the sender
1047 * of the audio signal.
1049 * Returns 0 for success else error. On error all resources can be freed
1050 * with a call to snd_soc_card_free().
1052 int snd_soc_dapm_add_routes(struct snd_soc_codec *codec,
1053 const struct snd_soc_dapm_route *route, int num)
1057 for (i = 0; i < num; i++) {
1058 ret = snd_soc_dapm_add_route(codec, route->sink,
1059 route->control, route->source);
1061 printk(KERN_ERR "Failed to add route %s->%s\n",
1071 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
1074 * snd_soc_dapm_new_widgets - add new dapm widgets
1075 * @codec: audio codec
1077 * Checks the codec for any new dapm widgets and creates them if found.
1079 * Returns 0 for success.
1081 int snd_soc_dapm_new_widgets(struct snd_soc_codec *codec)
1083 struct snd_soc_dapm_widget *w;
1085 list_for_each_entry(w, &codec->dapm_widgets, list)
1091 case snd_soc_dapm_switch:
1092 case snd_soc_dapm_mixer:
1093 dapm_new_mixer(codec, w);
1095 case snd_soc_dapm_mux:
1096 dapm_new_mux(codec, w);
1098 case snd_soc_dapm_adc:
1099 case snd_soc_dapm_dac:
1100 case snd_soc_dapm_pga:
1101 dapm_new_pga(codec, w);
1103 case snd_soc_dapm_input:
1104 case snd_soc_dapm_output:
1105 case snd_soc_dapm_micbias:
1106 case snd_soc_dapm_spk:
1107 case snd_soc_dapm_hp:
1108 case snd_soc_dapm_mic:
1109 case snd_soc_dapm_line:
1110 case snd_soc_dapm_vmid:
1111 case snd_soc_dapm_pre:
1112 case snd_soc_dapm_post:
1118 dapm_power_widgets(codec, SND_SOC_DAPM_STREAM_NOP);
1121 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets);
1124 * snd_soc_dapm_get_volsw - dapm mixer get callback
1125 * @kcontrol: mixer control
1126 * @uinfo: control element information
1128 * Callback to get the value of a dapm mixer control.
1130 * Returns 0 for success.
1132 int snd_soc_dapm_get_volsw(struct snd_kcontrol *kcontrol,
1133 struct snd_ctl_elem_value *ucontrol)
1135 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1136 int reg = kcontrol->private_value & 0xff;
1137 int shift = (kcontrol->private_value >> 8) & 0x0f;
1138 int rshift = (kcontrol->private_value >> 12) & 0x0f;
1139 int max = (kcontrol->private_value >> 16) & 0xff;
1140 int invert = (kcontrol->private_value >> 24) & 0x01;
1141 int mask = (1 << fls(max)) - 1;
1143 /* return the saved value if we are powered down */
1144 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1145 ucontrol->value.integer.value[0] = widget->saved_value;
1149 ucontrol->value.integer.value[0] =
1150 (snd_soc_read(widget->codec, reg) >> shift) & mask;
1151 if (shift != rshift)
1152 ucontrol->value.integer.value[1] =
1153 (snd_soc_read(widget->codec, reg) >> rshift) & mask;
1155 ucontrol->value.integer.value[0] =
1156 max - ucontrol->value.integer.value[0];
1157 if (shift != rshift)
1158 ucontrol->value.integer.value[1] =
1159 max - ucontrol->value.integer.value[1];
1164 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw);
1167 * snd_soc_dapm_put_volsw - dapm mixer set callback
1168 * @kcontrol: mixer control
1169 * @uinfo: control element information
1171 * Callback to set the value of a dapm mixer control.
1173 * Returns 0 for success.
1175 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
1176 struct snd_ctl_elem_value *ucontrol)
1178 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1179 int reg = kcontrol->private_value & 0xff;
1180 int shift = (kcontrol->private_value >> 8) & 0x0f;
1181 int rshift = (kcontrol->private_value >> 12) & 0x0f;
1182 int max = (kcontrol->private_value >> 16) & 0xff;
1183 int mask = (1 << fls(max)) - 1;
1184 int invert = (kcontrol->private_value >> 24) & 0x01;
1185 unsigned short val, val2, val_mask;
1188 val = (ucontrol->value.integer.value[0] & mask);
1192 val_mask = mask << shift;
1194 if (shift != rshift) {
1195 val2 = (ucontrol->value.integer.value[1] & mask);
1198 val_mask |= mask << rshift;
1199 val |= val2 << rshift;
1202 mutex_lock(&widget->codec->mutex);
1203 widget->value = val;
1205 /* save volume value if the widget is powered down */
1206 if (widget->id == snd_soc_dapm_pga && !widget->power) {
1207 widget->saved_value = val;
1208 mutex_unlock(&widget->codec->mutex);
1212 dapm_mixer_update_power(widget, kcontrol, reg, val_mask, val, invert);
1213 if (widget->event) {
1214 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1215 ret = widget->event(widget, kcontrol,
1216 SND_SOC_DAPM_PRE_REG);
1222 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1223 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1224 ret = widget->event(widget, kcontrol,
1225 SND_SOC_DAPM_POST_REG);
1227 ret = snd_soc_update_bits(widget->codec, reg, val_mask, val);
1230 mutex_unlock(&widget->codec->mutex);
1233 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw);
1236 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1237 * @kcontrol: mixer control
1238 * @uinfo: control element information
1240 * Callback to get the value of a dapm enumerated double mixer control.
1242 * Returns 0 for success.
1244 int snd_soc_dapm_get_enum_double(struct snd_kcontrol *kcontrol,
1245 struct snd_ctl_elem_value *ucontrol)
1247 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1248 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1249 unsigned short val, bitmask;
1251 for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
1253 val = snd_soc_read(widget->codec, e->reg);
1254 ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
1255 if (e->shift_l != e->shift_r)
1256 ucontrol->value.enumerated.item[1] =
1257 (val >> e->shift_r) & (bitmask - 1);
1261 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double);
1264 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1265 * @kcontrol: mixer control
1266 * @uinfo: control element information
1268 * Callback to set the value of a dapm enumerated double mixer control.
1270 * Returns 0 for success.
1272 int snd_soc_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
1273 struct snd_ctl_elem_value *ucontrol)
1275 struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
1276 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1277 unsigned short val, mux;
1278 unsigned short mask, bitmask;
1281 for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
1283 if (ucontrol->value.enumerated.item[0] > e->mask - 1)
1285 mux = ucontrol->value.enumerated.item[0];
1286 val = mux << e->shift_l;
1287 mask = (bitmask - 1) << e->shift_l;
1288 if (e->shift_l != e->shift_r) {
1289 if (ucontrol->value.enumerated.item[1] > e->mask - 1)
1291 val |= ucontrol->value.enumerated.item[1] << e->shift_r;
1292 mask |= (bitmask - 1) << e->shift_r;
1295 mutex_lock(&widget->codec->mutex);
1296 widget->value = val;
1297 dapm_mux_update_power(widget, kcontrol, mask, mux, e);
1298 if (widget->event) {
1299 if (widget->event_flags & SND_SOC_DAPM_PRE_REG) {
1300 ret = widget->event(widget,
1301 kcontrol, SND_SOC_DAPM_PRE_REG);
1305 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1306 if (widget->event_flags & SND_SOC_DAPM_POST_REG)
1307 ret = widget->event(widget,
1308 kcontrol, SND_SOC_DAPM_POST_REG);
1310 ret = snd_soc_update_bits(widget->codec, e->reg, mask, val);
1313 mutex_unlock(&widget->codec->mutex);
1316 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double);
1319 * snd_soc_dapm_new_control - create new dapm control
1320 * @codec: audio codec
1321 * @widget: widget template
1323 * Creates a new dapm control based upon the template.
1325 * Returns 0 for success else error.
1327 int snd_soc_dapm_new_control(struct snd_soc_codec *codec,
1328 const struct snd_soc_dapm_widget *widget)
1330 struct snd_soc_dapm_widget *w;
1332 if ((w = dapm_cnew_widget(widget)) == NULL)
1336 INIT_LIST_HEAD(&w->sources);
1337 INIT_LIST_HEAD(&w->sinks);
1338 INIT_LIST_HEAD(&w->list);
1339 list_add(&w->list, &codec->dapm_widgets);
1341 /* machine layer set ups unconnected pins and insertions */
1345 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control);
1348 * snd_soc_dapm_new_controls - create new dapm controls
1349 * @codec: audio codec
1350 * @widget: widget array
1351 * @num: number of widgets
1353 * Creates new DAPM controls based upon the templates.
1355 * Returns 0 for success else error.
1357 int snd_soc_dapm_new_controls(struct snd_soc_codec *codec,
1358 const struct snd_soc_dapm_widget *widget,
1363 for (i = 0; i < num; i++) {
1364 ret = snd_soc_dapm_new_control(codec, widget);
1371 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls);
1375 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1376 * @codec: audio codec
1377 * @stream: stream name
1378 * @event: stream event
1380 * Sends a stream event to the dapm core. The core then makes any
1381 * necessary widget power changes.
1383 * Returns 0 for success else error.
1385 int snd_soc_dapm_stream_event(struct snd_soc_codec *codec,
1386 char *stream, int event)
1388 struct snd_soc_dapm_widget *w;
1393 mutex_lock(&codec->mutex);
1394 list_for_each_entry(w, &codec->dapm_widgets, list)
1398 pr_debug("widget %s\n %s stream %s event %d\n",
1399 w->name, w->sname, stream, event);
1400 if (strstr(w->sname, stream)) {
1402 case SND_SOC_DAPM_STREAM_START:
1405 case SND_SOC_DAPM_STREAM_STOP:
1408 case SND_SOC_DAPM_STREAM_SUSPEND:
1413 case SND_SOC_DAPM_STREAM_RESUME:
1419 case SND_SOC_DAPM_STREAM_PAUSE_PUSH:
1421 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE:
1426 mutex_unlock(&codec->mutex);
1428 dapm_power_widgets(codec, event);
1429 dump_dapm(codec, __func__);
1432 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event);
1435 * snd_soc_dapm_set_bias_level - set the bias level for the system
1436 * @socdev: audio device
1437 * @level: level to configure
1439 * Configure the bias (power) levels for the SoC audio device.
1441 * Returns 0 for success else error.
1443 int snd_soc_dapm_set_bias_level(struct snd_soc_device *socdev,
1444 enum snd_soc_bias_level level)
1446 struct snd_soc_codec *codec = socdev->codec;
1447 struct snd_soc_machine *machine = socdev->machine;
1450 if (machine->set_bias_level)
1451 ret = machine->set_bias_level(machine, level);
1452 if (ret == 0 && codec->set_bias_level)
1453 ret = codec->set_bias_level(codec, level);
1459 * snd_soc_dapm_enable_pin - enable pin.
1460 * @snd_soc_codec: SoC codec
1463 * Enables input/output pin and it's parents or children widgets iff there is
1464 * a valid audio route and active audio stream.
1465 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1466 * do any widget power switching.
1468 int snd_soc_dapm_enable_pin(struct snd_soc_codec *codec, char *pin)
1470 return snd_soc_dapm_set_pin(codec, pin, 1);
1472 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin);
1475 * snd_soc_dapm_disable_pin - disable pin.
1479 * Disables input/output pin and it's parents or children widgets.
1480 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1481 * do any widget power switching.
1483 int snd_soc_dapm_disable_pin(struct snd_soc_codec *codec, char *pin)
1485 return snd_soc_dapm_set_pin(codec, pin, 0);
1487 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin);
1490 * snd_soc_dapm_get_pin_status - get audio pin status
1491 * @codec: audio codec
1492 * @pin: audio signal pin endpoint (or start point)
1494 * Get audio pin status - connected or disconnected.
1496 * Returns 1 for connected otherwise 0.
1498 int snd_soc_dapm_get_pin_status(struct snd_soc_codec *codec, char *pin)
1500 struct snd_soc_dapm_widget *w;
1502 list_for_each_entry(w, &codec->dapm_widgets, list) {
1503 if (!strcmp(w->name, pin))
1504 return w->connected;
1509 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status);
1512 * snd_soc_dapm_free - free dapm resources
1513 * @socdev: SoC device
1515 * Free all dapm widgets and resources.
1517 void snd_soc_dapm_free(struct snd_soc_device *socdev)
1519 struct snd_soc_codec *codec = socdev->codec;
1521 snd_soc_dapm_sys_remove(socdev->dev);
1522 dapm_free_widgets(codec);
1524 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
1526 /* Module information */
1527 MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com");
1528 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1529 MODULE_LICENSE("GPL");