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 <linux/debugfs.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 struct dentry
*asoc_debugfs
;
74 static void pop_wait(void)
77 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time
));
80 static void pop_dbg(const char *fmt
, ...)
94 /* create a new dapm widget */
95 static inline struct snd_soc_dapm_widget
*dapm_cnew_widget(
96 const struct snd_soc_dapm_widget
*_widget
)
98 return kmemdup(_widget
, sizeof(*_widget
), GFP_KERNEL
);
101 /* set up initial codec paths */
102 static void dapm_set_path_status(struct snd_soc_dapm_widget
*w
,
103 struct snd_soc_dapm_path
*p
, int i
)
106 case snd_soc_dapm_switch
:
107 case snd_soc_dapm_mixer
: {
109 struct soc_mixer_control
*mc
= (struct soc_mixer_control
*)
110 w
->kcontrols
[i
].private_value
;
111 unsigned int reg
= mc
->reg
;
112 unsigned int shift
= mc
->shift
;
114 unsigned int mask
= (1 << fls(max
)) - 1;
115 unsigned int invert
= mc
->invert
;
117 val
= snd_soc_read(w
->codec
, reg
);
118 val
= (val
>> shift
) & mask
;
120 if ((invert
&& !val
) || (!invert
&& val
))
126 case snd_soc_dapm_mux
: {
127 struct soc_enum
*e
= (struct soc_enum
*)w
->kcontrols
[i
].private_value
;
128 int val
, item
, bitmask
;
130 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
132 val
= snd_soc_read(w
->codec
, e
->reg
);
133 item
= (val
>> e
->shift_l
) & (bitmask
- 1);
136 for (i
= 0; i
< e
->max
; i
++) {
137 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
142 /* does not effect routing - always connected */
143 case snd_soc_dapm_pga
:
144 case snd_soc_dapm_output
:
145 case snd_soc_dapm_adc
:
146 case snd_soc_dapm_input
:
147 case snd_soc_dapm_dac
:
148 case snd_soc_dapm_micbias
:
149 case snd_soc_dapm_vmid
:
152 /* does effect routing - dynamically connected */
153 case snd_soc_dapm_hp
:
154 case snd_soc_dapm_mic
:
155 case snd_soc_dapm_spk
:
156 case snd_soc_dapm_line
:
157 case snd_soc_dapm_pre
:
158 case snd_soc_dapm_post
:
164 /* connect mux widget to it's interconnecting audio paths */
165 static int dapm_connect_mux(struct snd_soc_codec
*codec
,
166 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
167 struct snd_soc_dapm_path
*path
, const char *control_name
,
168 const struct snd_kcontrol_new
*kcontrol
)
170 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
173 for (i
= 0; i
< e
->max
; i
++) {
174 if (!(strcmp(control_name
, e
->texts
[i
]))) {
175 list_add(&path
->list
, &codec
->dapm_paths
);
176 list_add(&path
->list_sink
, &dest
->sources
);
177 list_add(&path
->list_source
, &src
->sinks
);
178 path
->name
= (char*)e
->texts
[i
];
179 dapm_set_path_status(dest
, path
, 0);
187 /* connect mixer widget to it's interconnecting audio paths */
188 static int dapm_connect_mixer(struct snd_soc_codec
*codec
,
189 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
190 struct snd_soc_dapm_path
*path
, const char *control_name
)
194 /* search for mixer kcontrol */
195 for (i
= 0; i
< dest
->num_kcontrols
; i
++) {
196 if (!strcmp(control_name
, dest
->kcontrols
[i
].name
)) {
197 list_add(&path
->list
, &codec
->dapm_paths
);
198 list_add(&path
->list_sink
, &dest
->sources
);
199 list_add(&path
->list_source
, &src
->sinks
);
200 path
->name
= dest
->kcontrols
[i
].name
;
201 dapm_set_path_status(dest
, path
, i
);
208 /* update dapm codec register bits */
209 static int dapm_update_bits(struct snd_soc_dapm_widget
*widget
)
212 unsigned short old
, new;
213 struct snd_soc_codec
*codec
= widget
->codec
;
215 /* check for valid widgets */
216 if (widget
->reg
< 0 || widget
->id
== snd_soc_dapm_input
||
217 widget
->id
== snd_soc_dapm_output
||
218 widget
->id
== snd_soc_dapm_hp
||
219 widget
->id
== snd_soc_dapm_mic
||
220 widget
->id
== snd_soc_dapm_line
||
221 widget
->id
== snd_soc_dapm_spk
)
224 power
= widget
->power
;
226 power
= (power
? 0:1);
228 old
= snd_soc_read(codec
, widget
->reg
);
229 new = (old
& ~(0x1 << widget
->shift
)) | (power
<< widget
->shift
);
233 pop_dbg("pop test %s : %s in %d ms\n", widget
->name
,
234 widget
->power
? "on" : "off", pop_time
);
235 snd_soc_write(codec
, widget
->reg
, new);
238 pr_debug("reg %x old %x new %x change %d\n", widget
->reg
,
243 /* ramps the volume up or down to minimise pops before or after a
244 * DAPM power event */
245 static int dapm_set_pga(struct snd_soc_dapm_widget
*widget
, int power
)
247 const struct snd_kcontrol_new
*k
= widget
->kcontrols
;
249 if (widget
->muted
&& !power
)
251 if (!widget
->muted
&& power
)
254 if (widget
->num_kcontrols
&& k
) {
255 struct soc_mixer_control
*mc
=
256 (struct soc_mixer_control
*)k
->private_value
;
257 unsigned int reg
= mc
->reg
;
258 unsigned int shift
= mc
->shift
;
260 unsigned int mask
= (1 << fls(max
)) - 1;
261 unsigned int invert
= mc
->invert
;
265 /* power up has happended, increase volume to last level */
267 for (i
= max
; i
> widget
->saved_value
; i
--)
268 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
270 for (i
= 0; i
< widget
->saved_value
; i
++)
271 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
275 /* power down is about to occur, decrease volume to mute */
276 int val
= snd_soc_read(widget
->codec
, reg
);
277 int i
= widget
->saved_value
= (val
>> shift
) & mask
;
279 for (; i
< mask
; i
++)
280 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
283 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
291 /* create new dapm mixer control */
292 static int dapm_new_mixer(struct snd_soc_codec
*codec
,
293 struct snd_soc_dapm_widget
*w
)
297 struct snd_soc_dapm_path
*path
;
300 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
303 list_for_each_entry(path
, &w
->sources
, list_sink
) {
305 /* mixer/mux paths name must match control name */
306 if (path
->name
!= (char*)w
->kcontrols
[i
].name
)
309 /* add dapm control with long name */
310 snprintf(name
, 32, "%s %s", w
->name
, w
->kcontrols
[i
].name
);
311 path
->long_name
= kstrdup (name
, GFP_KERNEL
);
312 if (path
->long_name
== NULL
)
315 path
->kcontrol
= snd_soc_cnew(&w
->kcontrols
[i
], w
,
317 ret
= snd_ctl_add(codec
->card
, path
->kcontrol
);
319 printk(KERN_ERR
"asoc: failed to add dapm kcontrol %s\n",
321 kfree(path
->long_name
);
322 path
->long_name
= NULL
;
330 /* create new dapm mux control */
331 static int dapm_new_mux(struct snd_soc_codec
*codec
,
332 struct snd_soc_dapm_widget
*w
)
334 struct snd_soc_dapm_path
*path
= NULL
;
335 struct snd_kcontrol
*kcontrol
;
338 if (!w
->num_kcontrols
) {
339 printk(KERN_ERR
"asoc: mux %s has no controls\n", w
->name
);
343 kcontrol
= snd_soc_cnew(&w
->kcontrols
[0], w
, w
->name
);
344 ret
= snd_ctl_add(codec
->card
, kcontrol
);
348 list_for_each_entry(path
, &w
->sources
, list_sink
)
349 path
->kcontrol
= kcontrol
;
354 printk(KERN_ERR
"asoc: failed to add kcontrol %s\n", w
->name
);
358 /* create new dapm volume control */
359 static int dapm_new_pga(struct snd_soc_codec
*codec
,
360 struct snd_soc_dapm_widget
*w
)
362 struct snd_kcontrol
*kcontrol
;
365 if (!w
->num_kcontrols
)
368 kcontrol
= snd_soc_cnew(&w
->kcontrols
[0], w
, w
->name
);
369 ret
= snd_ctl_add(codec
->card
, kcontrol
);
371 printk(KERN_ERR
"asoc: failed to add kcontrol %s\n", w
->name
);
378 /* reset 'walked' bit for each dapm path */
379 static inline void dapm_clear_walk(struct snd_soc_codec
*codec
)
381 struct snd_soc_dapm_path
*p
;
383 list_for_each_entry(p
, &codec
->dapm_paths
, list
)
388 * Recursively check for a completed path to an active or physically connected
389 * output widget. Returns number of complete paths.
391 static int is_connected_output_ep(struct snd_soc_dapm_widget
*widget
)
393 struct snd_soc_dapm_path
*path
;
396 if (widget
->id
== snd_soc_dapm_adc
&& widget
->active
)
399 if (widget
->connected
) {
400 /* connected pin ? */
401 if (widget
->id
== snd_soc_dapm_output
&& !widget
->ext
)
404 /* connected jack or spk ? */
405 if (widget
->id
== snd_soc_dapm_hp
|| widget
->id
== snd_soc_dapm_spk
||
406 widget
->id
== snd_soc_dapm_line
)
410 list_for_each_entry(path
, &widget
->sinks
, list_source
) {
414 if (path
->sink
&& path
->connect
) {
416 con
+= is_connected_output_ep(path
->sink
);
424 * Recursively check for a completed path to an active or physically connected
425 * input widget. Returns number of complete paths.
427 static int is_connected_input_ep(struct snd_soc_dapm_widget
*widget
)
429 struct snd_soc_dapm_path
*path
;
432 /* active stream ? */
433 if (widget
->id
== snd_soc_dapm_dac
&& widget
->active
)
436 if (widget
->connected
) {
437 /* connected pin ? */
438 if (widget
->id
== snd_soc_dapm_input
&& !widget
->ext
)
441 /* connected VMID/Bias for lower pops */
442 if (widget
->id
== snd_soc_dapm_vmid
)
445 /* connected jack ? */
446 if (widget
->id
== snd_soc_dapm_mic
|| widget
->id
== snd_soc_dapm_line
)
450 list_for_each_entry(path
, &widget
->sources
, list_sink
) {
454 if (path
->source
&& path
->connect
) {
456 con
+= is_connected_input_ep(path
->source
);
464 * Handler for generic register modifier widget.
466 int dapm_reg_event(struct snd_soc_dapm_widget
*w
,
467 struct snd_kcontrol
*kcontrol
, int event
)
471 if (SND_SOC_DAPM_EVENT_ON(event
))
476 snd_soc_update_bits(w
->codec
, -(w
->reg
+ 1),
477 w
->mask
<< w
->shift
, val
<< w
->shift
);
481 EXPORT_SYMBOL_GPL(dapm_reg_event
);
484 * Scan each dapm widget for complete audio path.
485 * A complete path is a route that has valid endpoints i.e.:-
487 * o DAC to output pin.
488 * o Input Pin to ADC.
489 * o Input pin to Output pin (bypass, sidetone)
490 * o DAC to ADC (loopback).
492 static int dapm_power_widgets(struct snd_soc_codec
*codec
, int event
)
494 struct snd_soc_dapm_widget
*w
;
495 int in
, out
, i
, c
= 1, *seq
= NULL
, ret
= 0, power_change
, power
;
497 /* do we have a sequenced stream event */
498 if (event
== SND_SOC_DAPM_STREAM_START
) {
499 c
= ARRAY_SIZE(dapm_up_seq
);
501 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
502 c
= ARRAY_SIZE(dapm_down_seq
);
506 for(i
= 0; i
< c
; i
++) {
507 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
509 /* is widget in stream order */
510 if (seq
&& seq
[i
] && w
->id
!= seq
[i
])
513 /* vmid - no action */
514 if (w
->id
== snd_soc_dapm_vmid
)
518 if (w
->id
== snd_soc_dapm_adc
&& w
->active
) {
519 in
= is_connected_input_ep(w
);
520 dapm_clear_walk(w
->codec
);
521 w
->power
= (in
!= 0) ? 1 : 0;
527 if (w
->id
== snd_soc_dapm_dac
&& w
->active
) {
528 out
= is_connected_output_ep(w
);
529 dapm_clear_walk(w
->codec
);
530 w
->power
= (out
!= 0) ? 1 : 0;
535 /* pre and post event widgets */
536 if (w
->id
== snd_soc_dapm_pre
) {
540 if (event
== SND_SOC_DAPM_STREAM_START
) {
542 NULL
, SND_SOC_DAPM_PRE_PMU
);
545 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
547 NULL
, SND_SOC_DAPM_PRE_PMD
);
553 if (w
->id
== snd_soc_dapm_post
) {
557 if (event
== SND_SOC_DAPM_STREAM_START
) {
559 NULL
, SND_SOC_DAPM_POST_PMU
);
562 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
564 NULL
, SND_SOC_DAPM_POST_PMD
);
571 /* all other widgets */
572 in
= is_connected_input_ep(w
);
573 dapm_clear_walk(w
->codec
);
574 out
= is_connected_output_ep(w
);
575 dapm_clear_walk(w
->codec
);
576 power
= (out
!= 0 && in
!= 0) ? 1 : 0;
577 power_change
= (w
->power
== power
) ? 0: 1;
583 /* call any power change event handlers */
585 pr_debug("power %s event for %s flags %x\n",
586 w
->power
? "on" : "off",
587 w
->name
, w
->event_flags
);
589 /* power up pre event */
590 if (power
&& w
->event
&&
591 (w
->event_flags
& SND_SOC_DAPM_PRE_PMU
)) {
592 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMU
);
597 /* power down pre event */
598 if (!power
&& w
->event
&&
599 (w
->event_flags
& SND_SOC_DAPM_PRE_PMD
)) {
600 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMD
);
605 /* Lower PGA volume to reduce pops */
606 if (w
->id
== snd_soc_dapm_pga
&& !power
)
607 dapm_set_pga(w
, power
);
611 /* Raise PGA volume to reduce pops */
612 if (w
->id
== snd_soc_dapm_pga
&& power
)
613 dapm_set_pga(w
, power
);
615 /* power up post event */
616 if (power
&& w
->event
&&
617 (w
->event_flags
& SND_SOC_DAPM_POST_PMU
)) {
619 NULL
, SND_SOC_DAPM_POST_PMU
);
624 /* power down post event */
625 if (!power
&& w
->event
&&
626 (w
->event_flags
& SND_SOC_DAPM_POST_PMD
)) {
627 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_POST_PMD
);
638 static void dbg_dump_dapm(struct snd_soc_codec
* codec
, const char *action
)
640 struct snd_soc_dapm_widget
*w
;
641 struct snd_soc_dapm_path
*p
= NULL
;
644 printk("DAPM %s %s\n", codec
->name
, action
);
646 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
648 /* only display widgets that effect routing */
650 case snd_soc_dapm_pre
:
651 case snd_soc_dapm_post
:
652 case snd_soc_dapm_vmid
:
654 case snd_soc_dapm_mux
:
655 case snd_soc_dapm_output
:
656 case snd_soc_dapm_input
:
657 case snd_soc_dapm_switch
:
658 case snd_soc_dapm_hp
:
659 case snd_soc_dapm_mic
:
660 case snd_soc_dapm_spk
:
661 case snd_soc_dapm_line
:
662 case snd_soc_dapm_micbias
:
663 case snd_soc_dapm_dac
:
664 case snd_soc_dapm_adc
:
665 case snd_soc_dapm_pga
:
666 case snd_soc_dapm_mixer
:
668 in
= is_connected_input_ep(w
);
669 dapm_clear_walk(w
->codec
);
670 out
= is_connected_output_ep(w
);
671 dapm_clear_walk(w
->codec
);
672 printk("%s: %s in %d out %d\n", w
->name
,
673 w
->power
? "On":"Off",in
, out
);
675 list_for_each_entry(p
, &w
->sources
, list_sink
) {
677 printk(" in %s %s\n", p
->name
? p
->name
: "static",
680 list_for_each_entry(p
, &w
->sinks
, list_source
) {
682 printk(" out %s %s\n", p
->name
? p
->name
: "static",
692 /* test and update the power status of a mux widget */
693 static int dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
694 struct snd_kcontrol
*kcontrol
, int mask
,
695 int mux
, int val
, struct soc_enum
*e
)
697 struct snd_soc_dapm_path
*path
;
700 if (widget
->id
!= snd_soc_dapm_mux
)
703 if (!snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
))
706 /* find dapm widget path assoc with kcontrol */
707 list_for_each_entry(path
, &widget
->codec
->dapm_paths
, list
) {
708 if (path
->kcontrol
!= kcontrol
)
711 if (!path
->name
|| !e
->texts
[mux
])
715 /* we now need to match the string in the enum to the path */
716 if (!(strcmp(path
->name
, e
->texts
[mux
])))
717 path
->connect
= 1; /* new connection */
719 path
->connect
= 0; /* old connection must be powered down */
723 dapm_power_widgets(widget
->codec
, SND_SOC_DAPM_STREAM_NOP
);
724 dump_dapm(widget
->codec
, "mux power update");
730 /* test and update the power status of a mixer or switch widget */
731 static int dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
732 struct snd_kcontrol
*kcontrol
, int reg
,
733 int val_mask
, int val
, int invert
)
735 struct snd_soc_dapm_path
*path
;
738 if (widget
->id
!= snd_soc_dapm_mixer
&&
739 widget
->id
!= snd_soc_dapm_switch
)
742 if (!snd_soc_test_bits(widget
->codec
, reg
, val_mask
, val
))
745 /* find dapm widget path assoc with kcontrol */
746 list_for_each_entry(path
, &widget
->codec
->dapm_paths
, list
) {
747 if (path
->kcontrol
!= kcontrol
)
750 /* found, now check type */
754 path
->connect
= invert
? 0:1;
756 /* old connection must be powered down */
757 path
->connect
= invert
? 1:0;
762 dapm_power_widgets(widget
->codec
, SND_SOC_DAPM_STREAM_NOP
);
763 dump_dapm(widget
->codec
, "mixer power update");
769 /* show dapm widget status in sys fs */
770 static ssize_t
dapm_widget_show(struct device
*dev
,
771 struct device_attribute
*attr
, char *buf
)
773 struct snd_soc_device
*devdata
= dev_get_drvdata(dev
);
774 struct snd_soc_codec
*codec
= devdata
->codec
;
775 struct snd_soc_dapm_widget
*w
;
777 char *state
= "not set";
779 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
781 /* only display widgets that burnm power */
783 case snd_soc_dapm_hp
:
784 case snd_soc_dapm_mic
:
785 case snd_soc_dapm_spk
:
786 case snd_soc_dapm_line
:
787 case snd_soc_dapm_micbias
:
788 case snd_soc_dapm_dac
:
789 case snd_soc_dapm_adc
:
790 case snd_soc_dapm_pga
:
791 case snd_soc_dapm_mixer
:
793 count
+= sprintf(buf
+ count
, "%s: %s\n",
794 w
->name
, w
->power
? "On":"Off");
801 switch (codec
->bias_level
) {
802 case SND_SOC_BIAS_ON
:
805 case SND_SOC_BIAS_PREPARE
:
808 case SND_SOC_BIAS_STANDBY
:
811 case SND_SOC_BIAS_OFF
:
815 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
820 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
822 int snd_soc_dapm_sys_add(struct device
*dev
)
829 ret
= device_create_file(dev
, &dev_attr_dapm_widget
);
833 asoc_debugfs
= debugfs_create_dir("asoc", NULL
);
834 if (!IS_ERR(asoc_debugfs
))
835 debugfs_create_u32("dapm_pop_time", 0744, asoc_debugfs
,
843 static void snd_soc_dapm_sys_remove(struct device
*dev
)
846 device_remove_file(dev
, &dev_attr_dapm_widget
);
850 debugfs_remove_recursive(asoc_debugfs
);
853 /* free all dapm widgets and resources */
854 static void dapm_free_widgets(struct snd_soc_codec
*codec
)
856 struct snd_soc_dapm_widget
*w
, *next_w
;
857 struct snd_soc_dapm_path
*p
, *next_p
;
859 list_for_each_entry_safe(w
, next_w
, &codec
->dapm_widgets
, list
) {
864 list_for_each_entry_safe(p
, next_p
, &codec
->dapm_paths
, list
) {
871 static int snd_soc_dapm_set_pin(struct snd_soc_codec
*codec
,
872 char *pin
, int status
)
874 struct snd_soc_dapm_widget
*w
;
876 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
877 if (!strcmp(w
->name
, pin
)) {
878 pr_debug("dapm: %s: pin %s\n", codec
->name
, pin
);
879 w
->connected
= status
;
884 pr_err("dapm: %s: configuring unknown pin %s\n", codec
->name
, pin
);
889 * snd_soc_dapm_sync - scan and power dapm paths
890 * @codec: audio codec
892 * Walks all dapm audio paths and powers widgets according to their
893 * stream or path usage.
895 * Returns 0 for success.
897 int snd_soc_dapm_sync(struct snd_soc_codec
*codec
)
899 int ret
= dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
900 dump_dapm(codec
, "sync");
903 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
905 static int snd_soc_dapm_add_route(struct snd_soc_codec
*codec
,
906 const char *sink
, const char *control
, const char *source
)
908 struct snd_soc_dapm_path
*path
;
909 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
912 /* find src and dest widgets */
913 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
915 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
919 if (!wsource
&& !(strcmp(w
->name
, source
))) {
924 if (wsource
== NULL
|| wsink
== NULL
)
927 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
931 path
->source
= wsource
;
933 INIT_LIST_HEAD(&path
->list
);
934 INIT_LIST_HEAD(&path
->list_source
);
935 INIT_LIST_HEAD(&path
->list_sink
);
937 /* check for external widgets */
938 if (wsink
->id
== snd_soc_dapm_input
) {
939 if (wsource
->id
== snd_soc_dapm_micbias
||
940 wsource
->id
== snd_soc_dapm_mic
||
941 wsink
->id
== snd_soc_dapm_line
||
942 wsink
->id
== snd_soc_dapm_output
)
945 if (wsource
->id
== snd_soc_dapm_output
) {
946 if (wsink
->id
== snd_soc_dapm_spk
||
947 wsink
->id
== snd_soc_dapm_hp
||
948 wsink
->id
== snd_soc_dapm_line
||
949 wsink
->id
== snd_soc_dapm_input
)
953 /* connect static paths */
954 if (control
== NULL
) {
955 list_add(&path
->list
, &codec
->dapm_paths
);
956 list_add(&path
->list_sink
, &wsink
->sources
);
957 list_add(&path
->list_source
, &wsource
->sinks
);
962 /* connect dynamic paths */
964 case snd_soc_dapm_adc
:
965 case snd_soc_dapm_dac
:
966 case snd_soc_dapm_pga
:
967 case snd_soc_dapm_input
:
968 case snd_soc_dapm_output
:
969 case snd_soc_dapm_micbias
:
970 case snd_soc_dapm_vmid
:
971 case snd_soc_dapm_pre
:
972 case snd_soc_dapm_post
:
973 list_add(&path
->list
, &codec
->dapm_paths
);
974 list_add(&path
->list_sink
, &wsink
->sources
);
975 list_add(&path
->list_source
, &wsource
->sinks
);
978 case snd_soc_dapm_mux
:
979 ret
= dapm_connect_mux(codec
, wsource
, wsink
, path
, control
,
980 &wsink
->kcontrols
[0]);
984 case snd_soc_dapm_switch
:
985 case snd_soc_dapm_mixer
:
986 ret
= dapm_connect_mixer(codec
, wsource
, wsink
, path
, control
);
990 case snd_soc_dapm_hp
:
991 case snd_soc_dapm_mic
:
992 case snd_soc_dapm_line
:
993 case snd_soc_dapm_spk
:
994 list_add(&path
->list
, &codec
->dapm_paths
);
995 list_add(&path
->list_sink
, &wsink
->sources
);
996 list_add(&path
->list_source
, &wsource
->sinks
);
1003 printk(KERN_WARNING
"asoc: no dapm match for %s --> %s --> %s\n", source
,
1010 * snd_soc_dapm_connect_input - connect dapm widgets
1011 * @codec: audio codec
1012 * @sink: name of target widget
1013 * @control: mixer control name
1014 * @source: name of source name
1016 * Connects 2 dapm widgets together via a named audio path. The sink is
1017 * the widget receiving the audio signal, whilst the source is the sender
1018 * of the audio signal.
1020 * This function has been deprecated in favour of snd_soc_dapm_add_routes().
1022 * Returns 0 for success else error.
1024 int snd_soc_dapm_connect_input(struct snd_soc_codec
*codec
, const char *sink
,
1025 const char *control
, const char *source
)
1027 return snd_soc_dapm_add_route(codec
, sink
, control
, source
);
1029 EXPORT_SYMBOL_GPL(snd_soc_dapm_connect_input
);
1032 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1034 * @route: audio routes
1035 * @num: number of routes
1037 * Connects 2 dapm widgets together via a named audio path. The sink is
1038 * the widget receiving the audio signal, whilst the source is the sender
1039 * of the audio signal.
1041 * Returns 0 for success else error. On error all resources can be freed
1042 * with a call to snd_soc_card_free().
1044 int snd_soc_dapm_add_routes(struct snd_soc_codec
*codec
,
1045 const struct snd_soc_dapm_route
*route
, int num
)
1049 for (i
= 0; i
< num
; i
++) {
1050 ret
= snd_soc_dapm_add_route(codec
, route
->sink
,
1051 route
->control
, route
->source
);
1053 printk(KERN_ERR
"Failed to add route %s->%s\n",
1063 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
1066 * snd_soc_dapm_new_widgets - add new dapm widgets
1067 * @codec: audio codec
1069 * Checks the codec for any new dapm widgets and creates them if found.
1071 * Returns 0 for success.
1073 int snd_soc_dapm_new_widgets(struct snd_soc_codec
*codec
)
1075 struct snd_soc_dapm_widget
*w
;
1077 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1083 case snd_soc_dapm_switch
:
1084 case snd_soc_dapm_mixer
:
1085 dapm_new_mixer(codec
, w
);
1087 case snd_soc_dapm_mux
:
1088 dapm_new_mux(codec
, w
);
1090 case snd_soc_dapm_adc
:
1091 case snd_soc_dapm_dac
:
1092 case snd_soc_dapm_pga
:
1093 dapm_new_pga(codec
, w
);
1095 case snd_soc_dapm_input
:
1096 case snd_soc_dapm_output
:
1097 case snd_soc_dapm_micbias
:
1098 case snd_soc_dapm_spk
:
1099 case snd_soc_dapm_hp
:
1100 case snd_soc_dapm_mic
:
1101 case snd_soc_dapm_line
:
1102 case snd_soc_dapm_vmid
:
1103 case snd_soc_dapm_pre
:
1104 case snd_soc_dapm_post
:
1110 dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
1113 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
1116 * snd_soc_dapm_get_volsw - dapm mixer get callback
1117 * @kcontrol: mixer control
1118 * @uinfo: control element information
1120 * Callback to get the value of a dapm mixer control.
1122 * Returns 0 for success.
1124 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
1125 struct snd_ctl_elem_value
*ucontrol
)
1127 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1128 struct soc_mixer_control
*mc
=
1129 (struct soc_mixer_control
*)kcontrol
->private_value
;
1130 unsigned int reg
= mc
->reg
;
1131 unsigned int shift
= mc
->shift
;
1132 unsigned int rshift
= mc
->rshift
;
1134 unsigned int invert
= mc
->invert
;
1135 unsigned int mask
= (1 << fls(max
)) - 1;
1137 /* return the saved value if we are powered down */
1138 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1139 ucontrol
->value
.integer
.value
[0] = widget
->saved_value
;
1143 ucontrol
->value
.integer
.value
[0] =
1144 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
1145 if (shift
!= rshift
)
1146 ucontrol
->value
.integer
.value
[1] =
1147 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
1149 ucontrol
->value
.integer
.value
[0] =
1150 max
- ucontrol
->value
.integer
.value
[0];
1151 if (shift
!= rshift
)
1152 ucontrol
->value
.integer
.value
[1] =
1153 max
- ucontrol
->value
.integer
.value
[1];
1158 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
1161 * snd_soc_dapm_put_volsw - dapm mixer set callback
1162 * @kcontrol: mixer control
1163 * @uinfo: control element information
1165 * Callback to set the value of a dapm mixer control.
1167 * Returns 0 for success.
1169 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
1170 struct snd_ctl_elem_value
*ucontrol
)
1172 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1173 struct soc_mixer_control
*mc
=
1174 (struct soc_mixer_control
*)kcontrol
->private_value
;
1175 unsigned int reg
= mc
->reg
;
1176 unsigned int shift
= mc
->shift
;
1177 unsigned int rshift
= mc
->rshift
;
1179 unsigned int mask
= (1 << fls(max
)) - 1;
1180 unsigned int invert
= mc
->invert
;
1181 unsigned short val
, val2
, val_mask
;
1184 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1188 val_mask
= mask
<< shift
;
1190 if (shift
!= rshift
) {
1191 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1194 val_mask
|= mask
<< rshift
;
1195 val
|= val2
<< rshift
;
1198 mutex_lock(&widget
->codec
->mutex
);
1199 widget
->value
= val
;
1201 /* save volume value if the widget is powered down */
1202 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1203 widget
->saved_value
= val
;
1204 mutex_unlock(&widget
->codec
->mutex
);
1208 dapm_mixer_update_power(widget
, kcontrol
, reg
, val_mask
, val
, invert
);
1209 if (widget
->event
) {
1210 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1211 ret
= widget
->event(widget
, kcontrol
,
1212 SND_SOC_DAPM_PRE_REG
);
1218 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1219 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1220 ret
= widget
->event(widget
, kcontrol
,
1221 SND_SOC_DAPM_POST_REG
);
1223 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1226 mutex_unlock(&widget
->codec
->mutex
);
1229 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
1232 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1233 * @kcontrol: mixer control
1234 * @uinfo: control element information
1236 * Callback to get the value of a dapm enumerated double mixer control.
1238 * Returns 0 for success.
1240 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
1241 struct snd_ctl_elem_value
*ucontrol
)
1243 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1244 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1245 unsigned short val
, bitmask
;
1247 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1249 val
= snd_soc_read(widget
->codec
, e
->reg
);
1250 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
1251 if (e
->shift_l
!= e
->shift_r
)
1252 ucontrol
->value
.enumerated
.item
[1] =
1253 (val
>> e
->shift_r
) & (bitmask
- 1);
1257 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
1260 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1261 * @kcontrol: mixer control
1262 * @uinfo: control element information
1264 * Callback to set the value of a dapm enumerated double mixer control.
1266 * Returns 0 for success.
1268 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
1269 struct snd_ctl_elem_value
*ucontrol
)
1271 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1272 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1273 unsigned short val
, mux
;
1274 unsigned short mask
, bitmask
;
1277 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1279 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1281 mux
= ucontrol
->value
.enumerated
.item
[0];
1282 val
= mux
<< e
->shift_l
;
1283 mask
= (bitmask
- 1) << e
->shift_l
;
1284 if (e
->shift_l
!= e
->shift_r
) {
1285 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1287 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1288 mask
|= (bitmask
- 1) << e
->shift_r
;
1291 mutex_lock(&widget
->codec
->mutex
);
1292 widget
->value
= val
;
1293 dapm_mux_update_power(widget
, kcontrol
, mask
, mux
, val
, e
);
1294 if (widget
->event
) {
1295 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1296 ret
= widget
->event(widget
,
1297 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1301 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1302 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1303 ret
= widget
->event(widget
,
1304 kcontrol
, SND_SOC_DAPM_POST_REG
);
1306 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1309 mutex_unlock(&widget
->codec
->mutex
);
1312 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
1315 * snd_soc_dapm_new_control - create new dapm control
1316 * @codec: audio codec
1317 * @widget: widget template
1319 * Creates a new dapm control based upon the template.
1321 * Returns 0 for success else error.
1323 int snd_soc_dapm_new_control(struct snd_soc_codec
*codec
,
1324 const struct snd_soc_dapm_widget
*widget
)
1326 struct snd_soc_dapm_widget
*w
;
1328 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
1332 INIT_LIST_HEAD(&w
->sources
);
1333 INIT_LIST_HEAD(&w
->sinks
);
1334 INIT_LIST_HEAD(&w
->list
);
1335 list_add(&w
->list
, &codec
->dapm_widgets
);
1337 /* machine layer set ups unconnected pins and insertions */
1341 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
1344 * snd_soc_dapm_new_controls - create new dapm controls
1345 * @codec: audio codec
1346 * @widget: widget array
1347 * @num: number of widgets
1349 * Creates new DAPM controls based upon the templates.
1351 * Returns 0 for success else error.
1353 int snd_soc_dapm_new_controls(struct snd_soc_codec
*codec
,
1354 const struct snd_soc_dapm_widget
*widget
,
1359 for (i
= 0; i
< num
; i
++) {
1360 ret
= snd_soc_dapm_new_control(codec
, widget
);
1367 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
1371 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1372 * @codec: audio codec
1373 * @stream: stream name
1374 * @event: stream event
1376 * Sends a stream event to the dapm core. The core then makes any
1377 * necessary widget power changes.
1379 * Returns 0 for success else error.
1381 int snd_soc_dapm_stream_event(struct snd_soc_codec
*codec
,
1382 char *stream
, int event
)
1384 struct snd_soc_dapm_widget
*w
;
1389 mutex_lock(&codec
->mutex
);
1390 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1394 pr_debug("widget %s\n %s stream %s event %d\n",
1395 w
->name
, w
->sname
, stream
, event
);
1396 if (strstr(w
->sname
, stream
)) {
1398 case SND_SOC_DAPM_STREAM_START
:
1401 case SND_SOC_DAPM_STREAM_STOP
:
1404 case SND_SOC_DAPM_STREAM_SUSPEND
:
1409 case SND_SOC_DAPM_STREAM_RESUME
:
1415 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
1417 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
1422 mutex_unlock(&codec
->mutex
);
1424 dapm_power_widgets(codec
, event
);
1425 dump_dapm(codec
, __func__
);
1428 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event
);
1431 * snd_soc_dapm_set_bias_level - set the bias level for the system
1432 * @socdev: audio device
1433 * @level: level to configure
1435 * Configure the bias (power) levels for the SoC audio device.
1437 * Returns 0 for success else error.
1439 int snd_soc_dapm_set_bias_level(struct snd_soc_device
*socdev
,
1440 enum snd_soc_bias_level level
)
1442 struct snd_soc_codec
*codec
= socdev
->codec
;
1443 struct snd_soc_machine
*machine
= socdev
->machine
;
1446 if (machine
->set_bias_level
)
1447 ret
= machine
->set_bias_level(machine
, level
);
1448 if (ret
== 0 && codec
->set_bias_level
)
1449 ret
= codec
->set_bias_level(codec
, level
);
1455 * snd_soc_dapm_enable_pin - enable pin.
1456 * @snd_soc_codec: SoC codec
1459 * Enables input/output pin and it's parents or children widgets iff there is
1460 * a valid audio route and active audio stream.
1461 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1462 * do any widget power switching.
1464 int snd_soc_dapm_enable_pin(struct snd_soc_codec
*codec
, char *pin
)
1466 return snd_soc_dapm_set_pin(codec
, pin
, 1);
1468 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
1471 * snd_soc_dapm_disable_pin - disable pin.
1475 * Disables input/output pin and it's parents or children widgets.
1476 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1477 * do any widget power switching.
1479 int snd_soc_dapm_disable_pin(struct snd_soc_codec
*codec
, char *pin
)
1481 return snd_soc_dapm_set_pin(codec
, pin
, 0);
1483 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
1486 * snd_soc_dapm_nc_pin - permanently disable pin.
1490 * Marks the specified pin as being not connected, disabling it along
1491 * any parent or child widgets. At present this is identical to
1492 * snd_soc_dapm_disable_pin() but in future it will be extended to do
1493 * additional things such as disabling controls which only affect
1494 * paths through the pin.
1496 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1497 * do any widget power switching.
1499 int snd_soc_dapm_nc_pin(struct snd_soc_codec
*codec
, char *pin
)
1501 return snd_soc_dapm_set_pin(codec
, pin
, 0);
1503 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin
);
1506 * snd_soc_dapm_get_pin_status - get audio pin status
1507 * @codec: audio codec
1508 * @pin: audio signal pin endpoint (or start point)
1510 * Get audio pin status - connected or disconnected.
1512 * Returns 1 for connected otherwise 0.
1514 int snd_soc_dapm_get_pin_status(struct snd_soc_codec
*codec
, char *pin
)
1516 struct snd_soc_dapm_widget
*w
;
1518 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
1519 if (!strcmp(w
->name
, pin
))
1520 return w
->connected
;
1525 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
1528 * snd_soc_dapm_free - free dapm resources
1529 * @socdev: SoC device
1531 * Free all dapm widgets and resources.
1533 void snd_soc_dapm_free(struct snd_soc_device
*socdev
)
1535 struct snd_soc_codec
*codec
= socdev
->codec
;
1537 snd_soc_dapm_sys_remove(socdev
->dev
);
1538 dapm_free_widgets(codec
);
1540 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
1542 /* Module information */
1543 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
1544 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1545 MODULE_LICENSE("GPL");