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 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
[val
])
716 /* we now need to match the string in the enum to the path */
717 if (!(strcmp(path
->name
, e
->texts
[val
])))
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
, 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");