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
);
475 * Scan each dapm widget for complete audio path.
476 * A complete path is a route that has valid endpoints i.e.:-
478 * o DAC to output pin.
479 * o Input Pin to ADC.
480 * o Input pin to Output pin (bypass, sidetone)
481 * o DAC to ADC (loopback).
483 static int dapm_power_widgets(struct snd_soc_codec
*codec
, int event
)
485 struct snd_soc_dapm_widget
*w
;
486 int in
, out
, i
, c
= 1, *seq
= NULL
, ret
= 0, power_change
, power
;
488 /* do we have a sequenced stream event */
489 if (event
== SND_SOC_DAPM_STREAM_START
) {
490 c
= ARRAY_SIZE(dapm_up_seq
);
492 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
493 c
= ARRAY_SIZE(dapm_down_seq
);
497 for(i
= 0; i
< c
; i
++) {
498 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
500 /* is widget in stream order */
501 if (seq
&& seq
[i
] && w
->id
!= seq
[i
])
504 /* vmid - no action */
505 if (w
->id
== snd_soc_dapm_vmid
)
509 if (w
->id
== snd_soc_dapm_adc
&& w
->active
) {
510 in
= is_connected_input_ep(w
);
511 dapm_clear_walk(w
->codec
);
512 w
->power
= (in
!= 0) ? 1 : 0;
518 if (w
->id
== snd_soc_dapm_dac
&& w
->active
) {
519 out
= is_connected_output_ep(w
);
520 dapm_clear_walk(w
->codec
);
521 w
->power
= (out
!= 0) ? 1 : 0;
526 /* programmable gain/attenuation */
527 if (w
->id
== snd_soc_dapm_pga
) {
529 in
= is_connected_input_ep(w
);
530 dapm_clear_walk(w
->codec
);
531 out
= is_connected_output_ep(w
);
532 dapm_clear_walk(w
->codec
);
533 w
->power
= on
= (out
!= 0 && in
!= 0) ? 1 : 0;
536 dapm_set_pga(w
, on
); /* lower volume to reduce pops */
539 dapm_set_pga(w
, on
); /* restore volume from zero */
544 /* pre and post event widgets */
545 if (w
->id
== snd_soc_dapm_pre
) {
549 if (event
== SND_SOC_DAPM_STREAM_START
) {
551 NULL
, SND_SOC_DAPM_PRE_PMU
);
554 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
556 NULL
, SND_SOC_DAPM_PRE_PMD
);
562 if (w
->id
== snd_soc_dapm_post
) {
566 if (event
== SND_SOC_DAPM_STREAM_START
) {
568 NULL
, SND_SOC_DAPM_POST_PMU
);
571 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
573 NULL
, SND_SOC_DAPM_POST_PMD
);
580 /* all other widgets */
581 in
= is_connected_input_ep(w
);
582 dapm_clear_walk(w
->codec
);
583 out
= is_connected_output_ep(w
);
584 dapm_clear_walk(w
->codec
);
585 power
= (out
!= 0 && in
!= 0) ? 1 : 0;
586 power_change
= (w
->power
== power
) ? 0: 1;
589 /* call any power change event handlers */
592 pr_debug("power %s event for %s flags %x\n",
593 w
->power
? "on" : "off", w
->name
, w
->event_flags
);
596 if (w
->event_flags
& SND_SOC_DAPM_PRE_PMU
) {
598 NULL
, SND_SOC_DAPM_PRE_PMU
);
603 if (w
->event_flags
& SND_SOC_DAPM_POST_PMU
){
605 NULL
, SND_SOC_DAPM_POST_PMU
);
610 /* power down event */
611 if (w
->event_flags
& SND_SOC_DAPM_PRE_PMD
) {
613 NULL
, SND_SOC_DAPM_PRE_PMD
);
618 if (w
->event_flags
& SND_SOC_DAPM_POST_PMD
) {
620 NULL
, SND_SOC_DAPM_POST_PMD
);
626 /* no event handler */
636 static void dbg_dump_dapm(struct snd_soc_codec
* codec
, const char *action
)
638 struct snd_soc_dapm_widget
*w
;
639 struct snd_soc_dapm_path
*p
= NULL
;
642 printk("DAPM %s %s\n", codec
->name
, action
);
644 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
646 /* only display widgets that effect routing */
648 case snd_soc_dapm_pre
:
649 case snd_soc_dapm_post
:
650 case snd_soc_dapm_vmid
:
652 case snd_soc_dapm_mux
:
653 case snd_soc_dapm_output
:
654 case snd_soc_dapm_input
:
655 case snd_soc_dapm_switch
:
656 case snd_soc_dapm_hp
:
657 case snd_soc_dapm_mic
:
658 case snd_soc_dapm_spk
:
659 case snd_soc_dapm_line
:
660 case snd_soc_dapm_micbias
:
661 case snd_soc_dapm_dac
:
662 case snd_soc_dapm_adc
:
663 case snd_soc_dapm_pga
:
664 case snd_soc_dapm_mixer
:
666 in
= is_connected_input_ep(w
);
667 dapm_clear_walk(w
->codec
);
668 out
= is_connected_output_ep(w
);
669 dapm_clear_walk(w
->codec
);
670 printk("%s: %s in %d out %d\n", w
->name
,
671 w
->power
? "On":"Off",in
, out
);
673 list_for_each_entry(p
, &w
->sources
, list_sink
) {
675 printk(" in %s %s\n", p
->name
? p
->name
: "static",
678 list_for_each_entry(p
, &w
->sinks
, list_source
) {
680 printk(" out %s %s\n", p
->name
? p
->name
: "static",
690 /* test and update the power status of a mux widget */
691 static int dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
692 struct snd_kcontrol
*kcontrol
, int mask
,
693 int val
, struct soc_enum
* e
)
695 struct snd_soc_dapm_path
*path
;
698 if (widget
->id
!= snd_soc_dapm_mux
)
701 if (!snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
))
704 /* find dapm widget path assoc with kcontrol */
705 list_for_each_entry(path
, &widget
->codec
->dapm_paths
, list
) {
706 if (path
->kcontrol
!= kcontrol
)
709 if (!path
->name
|| ! e
->texts
[val
])
713 /* we now need to match the string in the enum to the path */
714 if (!(strcmp(path
->name
, e
->texts
[val
])))
715 path
->connect
= 1; /* new connection */
717 path
->connect
= 0; /* old connection must be powered down */
721 dapm_power_widgets(widget
->codec
, SND_SOC_DAPM_STREAM_NOP
);
722 dump_dapm(widget
->codec
, "mux power update");
728 /* test and update the power status of a mixer or switch widget */
729 static int dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
730 struct snd_kcontrol
*kcontrol
, int reg
,
731 int val_mask
, int val
, int invert
)
733 struct snd_soc_dapm_path
*path
;
736 if (widget
->id
!= snd_soc_dapm_mixer
&&
737 widget
->id
!= snd_soc_dapm_switch
)
740 if (!snd_soc_test_bits(widget
->codec
, reg
, val_mask
, val
))
743 /* find dapm widget path assoc with kcontrol */
744 list_for_each_entry(path
, &widget
->codec
->dapm_paths
, list
) {
745 if (path
->kcontrol
!= kcontrol
)
748 /* found, now check type */
752 path
->connect
= invert
? 0:1;
754 /* old connection must be powered down */
755 path
->connect
= invert
? 1:0;
760 dapm_power_widgets(widget
->codec
, SND_SOC_DAPM_STREAM_NOP
);
761 dump_dapm(widget
->codec
, "mixer power update");
767 /* show dapm widget status in sys fs */
768 static ssize_t
dapm_widget_show(struct device
*dev
,
769 struct device_attribute
*attr
, char *buf
)
771 struct snd_soc_device
*devdata
= dev_get_drvdata(dev
);
772 struct snd_soc_codec
*codec
= devdata
->codec
;
773 struct snd_soc_dapm_widget
*w
;
775 char *state
= "not set";
777 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
779 /* only display widgets that burnm power */
781 case snd_soc_dapm_hp
:
782 case snd_soc_dapm_mic
:
783 case snd_soc_dapm_spk
:
784 case snd_soc_dapm_line
:
785 case snd_soc_dapm_micbias
:
786 case snd_soc_dapm_dac
:
787 case snd_soc_dapm_adc
:
788 case snd_soc_dapm_pga
:
789 case snd_soc_dapm_mixer
:
791 count
+= sprintf(buf
+ count
, "%s: %s\n",
792 w
->name
, w
->power
? "On":"Off");
799 switch (codec
->bias_level
) {
800 case SND_SOC_BIAS_ON
:
803 case SND_SOC_BIAS_PREPARE
:
806 case SND_SOC_BIAS_STANDBY
:
809 case SND_SOC_BIAS_OFF
:
813 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
818 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
820 /* pop/click delay times */
821 static ssize_t
dapm_pop_time_show(struct device
*dev
,
822 struct device_attribute
*attr
, char *buf
)
824 return sprintf(buf
, "%d\n", pop_time
);
827 static ssize_t
dapm_pop_time_store(struct device
*dev
,
828 struct device_attribute
*attr
,
829 const char *buf
, size_t count
)
834 if (strict_strtoul(buf
, 10, &val
) >= 0)
837 printk(KERN_ERR
"Unable to parse pop_time setting\n");
842 static DEVICE_ATTR(dapm_pop_time
, 0744, dapm_pop_time_show
,
843 dapm_pop_time_store
);
845 int snd_soc_dapm_sys_add(struct device
*dev
)
850 ret
= device_create_file(dev
, &dev_attr_dapm_widget
);
853 ret
= device_create_file(dev
, &dev_attr_dapm_pop_time
);
859 static void snd_soc_dapm_sys_remove(struct device
*dev
)
862 device_remove_file(dev
, &dev_attr_dapm_pop_time
);
863 device_remove_file(dev
, &dev_attr_dapm_widget
);
867 /* free all dapm widgets and resources */
868 static void dapm_free_widgets(struct snd_soc_codec
*codec
)
870 struct snd_soc_dapm_widget
*w
, *next_w
;
871 struct snd_soc_dapm_path
*p
, *next_p
;
873 list_for_each_entry_safe(w
, next_w
, &codec
->dapm_widgets
, list
) {
878 list_for_each_entry_safe(p
, next_p
, &codec
->dapm_paths
, list
) {
885 static int snd_soc_dapm_set_pin(struct snd_soc_codec
*codec
,
886 char *pin
, int status
)
888 struct snd_soc_dapm_widget
*w
;
890 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
891 if (!strcmp(w
->name
, pin
)) {
892 pr_debug("dapm: %s: pin %s\n", codec
->name
, pin
);
893 w
->connected
= status
;
898 pr_err("dapm: %s: configuring unknown pin %s\n", codec
->name
, pin
);
903 * snd_soc_dapm_sync - scan and power dapm paths
904 * @codec: audio codec
906 * Walks all dapm audio paths and powers widgets according to their
907 * stream or path usage.
909 * Returns 0 for success.
911 int snd_soc_dapm_sync(struct snd_soc_codec
*codec
)
913 int ret
= dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
914 dump_dapm(codec
, "sync");
917 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
919 static int snd_soc_dapm_add_route(struct snd_soc_codec
*codec
,
920 const char *sink
, const char *control
, const char *source
)
922 struct snd_soc_dapm_path
*path
;
923 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
926 /* find src and dest widgets */
927 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
929 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
933 if (!wsource
&& !(strcmp(w
->name
, source
))) {
938 if (wsource
== NULL
|| wsink
== NULL
)
941 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
945 path
->source
= wsource
;
947 INIT_LIST_HEAD(&path
->list
);
948 INIT_LIST_HEAD(&path
->list_source
);
949 INIT_LIST_HEAD(&path
->list_sink
);
951 /* check for external widgets */
952 if (wsink
->id
== snd_soc_dapm_input
) {
953 if (wsource
->id
== snd_soc_dapm_micbias
||
954 wsource
->id
== snd_soc_dapm_mic
||
955 wsink
->id
== snd_soc_dapm_line
||
956 wsink
->id
== snd_soc_dapm_output
)
959 if (wsource
->id
== snd_soc_dapm_output
) {
960 if (wsink
->id
== snd_soc_dapm_spk
||
961 wsink
->id
== snd_soc_dapm_hp
||
962 wsink
->id
== snd_soc_dapm_line
||
963 wsink
->id
== snd_soc_dapm_input
)
967 /* connect static paths */
968 if (control
== NULL
) {
969 list_add(&path
->list
, &codec
->dapm_paths
);
970 list_add(&path
->list_sink
, &wsink
->sources
);
971 list_add(&path
->list_source
, &wsource
->sinks
);
976 /* connect dynamic paths */
978 case snd_soc_dapm_adc
:
979 case snd_soc_dapm_dac
:
980 case snd_soc_dapm_pga
:
981 case snd_soc_dapm_input
:
982 case snd_soc_dapm_output
:
983 case snd_soc_dapm_micbias
:
984 case snd_soc_dapm_vmid
:
985 case snd_soc_dapm_pre
:
986 case snd_soc_dapm_post
:
987 list_add(&path
->list
, &codec
->dapm_paths
);
988 list_add(&path
->list_sink
, &wsink
->sources
);
989 list_add(&path
->list_source
, &wsource
->sinks
);
992 case snd_soc_dapm_mux
:
993 ret
= dapm_connect_mux(codec
, wsource
, wsink
, path
, control
,
994 &wsink
->kcontrols
[0]);
998 case snd_soc_dapm_switch
:
999 case snd_soc_dapm_mixer
:
1000 ret
= dapm_connect_mixer(codec
, wsource
, wsink
, path
, control
);
1004 case snd_soc_dapm_hp
:
1005 case snd_soc_dapm_mic
:
1006 case snd_soc_dapm_line
:
1007 case snd_soc_dapm_spk
:
1008 list_add(&path
->list
, &codec
->dapm_paths
);
1009 list_add(&path
->list_sink
, &wsink
->sources
);
1010 list_add(&path
->list_source
, &wsource
->sinks
);
1017 printk(KERN_WARNING
"asoc: no dapm match for %s --> %s --> %s\n", source
,
1024 * snd_soc_dapm_connect_input - connect dapm widgets
1025 * @codec: audio codec
1026 * @sink: name of target widget
1027 * @control: mixer control name
1028 * @source: name of source name
1030 * Connects 2 dapm widgets together via a named audio path. The sink is
1031 * the widget receiving the audio signal, whilst the source is the sender
1032 * of the audio signal.
1034 * This function has been deprecated in favour of snd_soc_dapm_add_routes().
1036 * Returns 0 for success else error.
1038 int snd_soc_dapm_connect_input(struct snd_soc_codec
*codec
, const char *sink
,
1039 const char *control
, const char *source
)
1041 return snd_soc_dapm_add_route(codec
, sink
, control
, source
);
1043 EXPORT_SYMBOL_GPL(snd_soc_dapm_connect_input
);
1046 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1048 * @route: audio routes
1049 * @num: number of routes
1051 * Connects 2 dapm widgets together via a named audio path. The sink is
1052 * the widget receiving the audio signal, whilst the source is the sender
1053 * of the audio signal.
1055 * Returns 0 for success else error. On error all resources can be freed
1056 * with a call to snd_soc_card_free().
1058 int snd_soc_dapm_add_routes(struct snd_soc_codec
*codec
,
1059 const struct snd_soc_dapm_route
*route
, int num
)
1063 for (i
= 0; i
< num
; i
++) {
1064 ret
= snd_soc_dapm_add_route(codec
, route
->sink
,
1065 route
->control
, route
->source
);
1067 printk(KERN_ERR
"Failed to add route %s->%s\n",
1077 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
1080 * snd_soc_dapm_new_widgets - add new dapm widgets
1081 * @codec: audio codec
1083 * Checks the codec for any new dapm widgets and creates them if found.
1085 * Returns 0 for success.
1087 int snd_soc_dapm_new_widgets(struct snd_soc_codec
*codec
)
1089 struct snd_soc_dapm_widget
*w
;
1091 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1097 case snd_soc_dapm_switch
:
1098 case snd_soc_dapm_mixer
:
1099 dapm_new_mixer(codec
, w
);
1101 case snd_soc_dapm_mux
:
1102 dapm_new_mux(codec
, w
);
1104 case snd_soc_dapm_adc
:
1105 case snd_soc_dapm_dac
:
1106 case snd_soc_dapm_pga
:
1107 dapm_new_pga(codec
, w
);
1109 case snd_soc_dapm_input
:
1110 case snd_soc_dapm_output
:
1111 case snd_soc_dapm_micbias
:
1112 case snd_soc_dapm_spk
:
1113 case snd_soc_dapm_hp
:
1114 case snd_soc_dapm_mic
:
1115 case snd_soc_dapm_line
:
1116 case snd_soc_dapm_vmid
:
1117 case snd_soc_dapm_pre
:
1118 case snd_soc_dapm_post
:
1124 dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
1127 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
1130 * snd_soc_dapm_get_volsw - dapm mixer get callback
1131 * @kcontrol: mixer control
1132 * @uinfo: control element information
1134 * Callback to get the value of a dapm mixer control.
1136 * Returns 0 for success.
1138 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
1139 struct snd_ctl_elem_value
*ucontrol
)
1141 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1142 int reg
= kcontrol
->private_value
& 0xff;
1143 int shift
= (kcontrol
->private_value
>> 8) & 0x0f;
1144 int rshift
= (kcontrol
->private_value
>> 12) & 0x0f;
1145 int max
= (kcontrol
->private_value
>> 16) & 0xff;
1146 int invert
= (kcontrol
->private_value
>> 24) & 0x01;
1147 int mask
= (1 << fls(max
)) - 1;
1149 /* return the saved value if we are powered down */
1150 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1151 ucontrol
->value
.integer
.value
[0] = widget
->saved_value
;
1155 ucontrol
->value
.integer
.value
[0] =
1156 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
1157 if (shift
!= rshift
)
1158 ucontrol
->value
.integer
.value
[1] =
1159 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
1161 ucontrol
->value
.integer
.value
[0] =
1162 max
- ucontrol
->value
.integer
.value
[0];
1163 if (shift
!= rshift
)
1164 ucontrol
->value
.integer
.value
[1] =
1165 max
- ucontrol
->value
.integer
.value
[1];
1170 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
1173 * snd_soc_dapm_put_volsw - dapm mixer set callback
1174 * @kcontrol: mixer control
1175 * @uinfo: control element information
1177 * Callback to set the value of a dapm mixer control.
1179 * Returns 0 for success.
1181 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
1182 struct snd_ctl_elem_value
*ucontrol
)
1184 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1185 int reg
= kcontrol
->private_value
& 0xff;
1186 int shift
= (kcontrol
->private_value
>> 8) & 0x0f;
1187 int rshift
= (kcontrol
->private_value
>> 12) & 0x0f;
1188 int max
= (kcontrol
->private_value
>> 16) & 0xff;
1189 int mask
= (1 << fls(max
)) - 1;
1190 int invert
= (kcontrol
->private_value
>> 24) & 0x01;
1191 unsigned short val
, val2
, val_mask
;
1194 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1198 val_mask
= mask
<< shift
;
1200 if (shift
!= rshift
) {
1201 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1204 val_mask
|= mask
<< rshift
;
1205 val
|= val2
<< rshift
;
1208 mutex_lock(&widget
->codec
->mutex
);
1209 widget
->value
= val
;
1211 /* save volume value if the widget is powered down */
1212 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1213 widget
->saved_value
= val
;
1214 mutex_unlock(&widget
->codec
->mutex
);
1218 dapm_mixer_update_power(widget
, kcontrol
, reg
, val_mask
, val
, invert
);
1219 if (widget
->event
) {
1220 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1221 ret
= widget
->event(widget
, kcontrol
,
1222 SND_SOC_DAPM_PRE_REG
);
1228 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1229 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1230 ret
= widget
->event(widget
, kcontrol
,
1231 SND_SOC_DAPM_POST_REG
);
1233 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1236 mutex_unlock(&widget
->codec
->mutex
);
1239 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
1242 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1243 * @kcontrol: mixer control
1244 * @uinfo: control element information
1246 * Callback to get the value of a dapm enumerated double mixer control.
1248 * Returns 0 for success.
1250 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
1251 struct snd_ctl_elem_value
*ucontrol
)
1253 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1254 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1255 unsigned short val
, bitmask
;
1257 for (bitmask
= 1; bitmask
< e
->mask
; bitmask
<<= 1)
1259 val
= snd_soc_read(widget
->codec
, e
->reg
);
1260 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
1261 if (e
->shift_l
!= e
->shift_r
)
1262 ucontrol
->value
.enumerated
.item
[1] =
1263 (val
>> e
->shift_r
) & (bitmask
- 1);
1267 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
1270 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1271 * @kcontrol: mixer control
1272 * @uinfo: control element information
1274 * Callback to set the value of a dapm enumerated double mixer control.
1276 * Returns 0 for success.
1278 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
1279 struct snd_ctl_elem_value
*ucontrol
)
1281 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1282 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1283 unsigned short val
, mux
;
1284 unsigned short mask
, bitmask
;
1287 for (bitmask
= 1; bitmask
< e
->mask
; bitmask
<<= 1)
1289 if (ucontrol
->value
.enumerated
.item
[0] > e
->mask
- 1)
1291 mux
= ucontrol
->value
.enumerated
.item
[0];
1292 val
= mux
<< e
->shift_l
;
1293 mask
= (bitmask
- 1) << e
->shift_l
;
1294 if (e
->shift_l
!= e
->shift_r
) {
1295 if (ucontrol
->value
.enumerated
.item
[1] > e
->mask
- 1)
1297 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1298 mask
|= (bitmask
- 1) << e
->shift_r
;
1301 mutex_lock(&widget
->codec
->mutex
);
1302 widget
->value
= val
;
1303 dapm_mux_update_power(widget
, kcontrol
, mask
, mux
, e
);
1304 if (widget
->event
) {
1305 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1306 ret
= widget
->event(widget
,
1307 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1311 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1312 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1313 ret
= widget
->event(widget
,
1314 kcontrol
, SND_SOC_DAPM_POST_REG
);
1316 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1319 mutex_unlock(&widget
->codec
->mutex
);
1322 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
1325 * snd_soc_dapm_new_control - create new dapm control
1326 * @codec: audio codec
1327 * @widget: widget template
1329 * Creates a new dapm control based upon the template.
1331 * Returns 0 for success else error.
1333 int snd_soc_dapm_new_control(struct snd_soc_codec
*codec
,
1334 const struct snd_soc_dapm_widget
*widget
)
1336 struct snd_soc_dapm_widget
*w
;
1338 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
1342 INIT_LIST_HEAD(&w
->sources
);
1343 INIT_LIST_HEAD(&w
->sinks
);
1344 INIT_LIST_HEAD(&w
->list
);
1345 list_add(&w
->list
, &codec
->dapm_widgets
);
1347 /* machine layer set ups unconnected pins and insertions */
1351 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
1354 * snd_soc_dapm_new_controls - create new dapm controls
1355 * @codec: audio codec
1356 * @widget: widget array
1357 * @num: number of widgets
1359 * Creates new DAPM controls based upon the templates.
1361 * Returns 0 for success else error.
1363 int snd_soc_dapm_new_controls(struct snd_soc_codec
*codec
,
1364 const struct snd_soc_dapm_widget
*widget
,
1369 for (i
= 0; i
< num
; i
++) {
1370 ret
= snd_soc_dapm_new_control(codec
, widget
);
1377 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
1381 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1382 * @codec: audio codec
1383 * @stream: stream name
1384 * @event: stream event
1386 * Sends a stream event to the dapm core. The core then makes any
1387 * necessary widget power changes.
1389 * Returns 0 for success else error.
1391 int snd_soc_dapm_stream_event(struct snd_soc_codec
*codec
,
1392 char *stream
, int event
)
1394 struct snd_soc_dapm_widget
*w
;
1399 mutex_lock(&codec
->mutex
);
1400 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1404 pr_debug("widget %s\n %s stream %s event %d\n",
1405 w
->name
, w
->sname
, stream
, event
);
1406 if (strstr(w
->sname
, stream
)) {
1408 case SND_SOC_DAPM_STREAM_START
:
1411 case SND_SOC_DAPM_STREAM_STOP
:
1414 case SND_SOC_DAPM_STREAM_SUSPEND
:
1419 case SND_SOC_DAPM_STREAM_RESUME
:
1425 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
1427 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
1432 mutex_unlock(&codec
->mutex
);
1434 dapm_power_widgets(codec
, event
);
1435 dump_dapm(codec
, __func__
);
1438 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event
);
1441 * snd_soc_dapm_set_bias_level - set the bias level for the system
1442 * @socdev: audio device
1443 * @level: level to configure
1445 * Configure the bias (power) levels for the SoC audio device.
1447 * Returns 0 for success else error.
1449 int snd_soc_dapm_set_bias_level(struct snd_soc_device
*socdev
,
1450 enum snd_soc_bias_level level
)
1452 struct snd_soc_codec
*codec
= socdev
->codec
;
1453 struct snd_soc_machine
*machine
= socdev
->machine
;
1456 if (machine
->set_bias_level
)
1457 ret
= machine
->set_bias_level(machine
, level
);
1458 if (ret
== 0 && codec
->set_bias_level
)
1459 ret
= codec
->set_bias_level(codec
, level
);
1465 * snd_soc_dapm_enable_pin - enable pin.
1466 * @snd_soc_codec: SoC codec
1469 * Enables input/output pin and it's parents or children widgets iff there is
1470 * a valid audio route and active audio stream.
1471 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1472 * do any widget power switching.
1474 int snd_soc_dapm_enable_pin(struct snd_soc_codec
*codec
, char *pin
)
1476 return snd_soc_dapm_set_pin(codec
, pin
, 1);
1478 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
1481 * snd_soc_dapm_disable_pin - disable pin.
1485 * Disables input/output pin and it's parents or children widgets.
1486 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1487 * do any widget power switching.
1489 int snd_soc_dapm_disable_pin(struct snd_soc_codec
*codec
, char *pin
)
1491 return snd_soc_dapm_set_pin(codec
, pin
, 0);
1493 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
1496 * snd_soc_dapm_get_pin_status - get audio pin status
1497 * @codec: audio codec
1498 * @pin: audio signal pin endpoint (or start point)
1500 * Get audio pin status - connected or disconnected.
1502 * Returns 1 for connected otherwise 0.
1504 int snd_soc_dapm_get_pin_status(struct snd_soc_codec
*codec
, char *pin
)
1506 struct snd_soc_dapm_widget
*w
;
1508 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
1509 if (!strcmp(w
->name
, pin
))
1510 return w
->connected
;
1515 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
1518 * snd_soc_dapm_free - free dapm resources
1519 * @socdev: SoC device
1521 * Free all dapm widgets and resources.
1523 void snd_soc_dapm_free(struct snd_soc_device
*socdev
)
1525 struct snd_soc_codec
*codec
= socdev
->codec
;
1527 snd_soc_dapm_sys_remove(socdev
->dev
);
1528 dapm_free_widgets(codec
);
1530 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
1532 /* Module information */
1533 MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com");
1534 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1535 MODULE_LICENSE("GPL");