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 /* pre and post event widgets */
527 if (w
->id
== snd_soc_dapm_pre
) {
531 if (event
== SND_SOC_DAPM_STREAM_START
) {
533 NULL
, SND_SOC_DAPM_PRE_PMU
);
536 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
538 NULL
, SND_SOC_DAPM_PRE_PMD
);
544 if (w
->id
== snd_soc_dapm_post
) {
548 if (event
== SND_SOC_DAPM_STREAM_START
) {
550 NULL
, SND_SOC_DAPM_POST_PMU
);
553 } else if (event
== SND_SOC_DAPM_STREAM_STOP
) {
555 NULL
, SND_SOC_DAPM_POST_PMD
);
562 /* all other widgets */
563 in
= is_connected_input_ep(w
);
564 dapm_clear_walk(w
->codec
);
565 out
= is_connected_output_ep(w
);
566 dapm_clear_walk(w
->codec
);
567 power
= (out
!= 0 && in
!= 0) ? 1 : 0;
568 power_change
= (w
->power
== power
) ? 0: 1;
574 /* call any power change event handlers */
576 pr_debug("power %s event for %s flags %x\n",
577 w
->power
? "on" : "off",
578 w
->name
, w
->event_flags
);
580 /* power up pre event */
581 if (power
&& w
->event
&&
582 (w
->event_flags
& SND_SOC_DAPM_PRE_PMU
)) {
583 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMU
);
588 /* power down pre event */
589 if (!power
&& w
->event
&&
590 (w
->event_flags
& SND_SOC_DAPM_PRE_PMD
)) {
591 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMD
);
596 /* Lower PGA volume to reduce pops */
597 if (w
->id
== snd_soc_dapm_pga
&& !power
)
598 dapm_set_pga(w
, power
);
602 /* Raise PGA volume to reduce pops */
603 if (w
->id
== snd_soc_dapm_pga
&& power
)
604 dapm_set_pga(w
, power
);
606 /* power up post event */
607 if (power
&& w
->event
&&
608 (w
->event_flags
& SND_SOC_DAPM_POST_PMU
)) {
610 NULL
, SND_SOC_DAPM_POST_PMU
);
615 /* power down post event */
616 if (!power
&& w
->event
&&
617 (w
->event_flags
& SND_SOC_DAPM_POST_PMD
)) {
618 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_POST_PMD
);
629 static void dbg_dump_dapm(struct snd_soc_codec
* codec
, const char *action
)
631 struct snd_soc_dapm_widget
*w
;
632 struct snd_soc_dapm_path
*p
= NULL
;
635 printk("DAPM %s %s\n", codec
->name
, action
);
637 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
639 /* only display widgets that effect routing */
641 case snd_soc_dapm_pre
:
642 case snd_soc_dapm_post
:
643 case snd_soc_dapm_vmid
:
645 case snd_soc_dapm_mux
:
646 case snd_soc_dapm_output
:
647 case snd_soc_dapm_input
:
648 case snd_soc_dapm_switch
:
649 case snd_soc_dapm_hp
:
650 case snd_soc_dapm_mic
:
651 case snd_soc_dapm_spk
:
652 case snd_soc_dapm_line
:
653 case snd_soc_dapm_micbias
:
654 case snd_soc_dapm_dac
:
655 case snd_soc_dapm_adc
:
656 case snd_soc_dapm_pga
:
657 case snd_soc_dapm_mixer
:
659 in
= is_connected_input_ep(w
);
660 dapm_clear_walk(w
->codec
);
661 out
= is_connected_output_ep(w
);
662 dapm_clear_walk(w
->codec
);
663 printk("%s: %s in %d out %d\n", w
->name
,
664 w
->power
? "On":"Off",in
, out
);
666 list_for_each_entry(p
, &w
->sources
, list_sink
) {
668 printk(" in %s %s\n", p
->name
? p
->name
: "static",
671 list_for_each_entry(p
, &w
->sinks
, list_source
) {
673 printk(" out %s %s\n", p
->name
? p
->name
: "static",
683 /* test and update the power status of a mux widget */
684 static int dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
685 struct snd_kcontrol
*kcontrol
, int mask
,
686 int val
, struct soc_enum
* e
)
688 struct snd_soc_dapm_path
*path
;
691 if (widget
->id
!= snd_soc_dapm_mux
)
694 if (!snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
))
697 /* find dapm widget path assoc with kcontrol */
698 list_for_each_entry(path
, &widget
->codec
->dapm_paths
, list
) {
699 if (path
->kcontrol
!= kcontrol
)
702 if (!path
->name
|| ! e
->texts
[val
])
706 /* we now need to match the string in the enum to the path */
707 if (!(strcmp(path
->name
, e
->texts
[val
])))
708 path
->connect
= 1; /* new connection */
710 path
->connect
= 0; /* old connection must be powered down */
714 dapm_power_widgets(widget
->codec
, SND_SOC_DAPM_STREAM_NOP
);
715 dump_dapm(widget
->codec
, "mux power update");
721 /* test and update the power status of a mixer or switch widget */
722 static int dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
723 struct snd_kcontrol
*kcontrol
, int reg
,
724 int val_mask
, int val
, int invert
)
726 struct snd_soc_dapm_path
*path
;
729 if (widget
->id
!= snd_soc_dapm_mixer
&&
730 widget
->id
!= snd_soc_dapm_switch
)
733 if (!snd_soc_test_bits(widget
->codec
, reg
, val_mask
, val
))
736 /* find dapm widget path assoc with kcontrol */
737 list_for_each_entry(path
, &widget
->codec
->dapm_paths
, list
) {
738 if (path
->kcontrol
!= kcontrol
)
741 /* found, now check type */
745 path
->connect
= invert
? 0:1;
747 /* old connection must be powered down */
748 path
->connect
= invert
? 1:0;
753 dapm_power_widgets(widget
->codec
, SND_SOC_DAPM_STREAM_NOP
);
754 dump_dapm(widget
->codec
, "mixer power update");
760 /* show dapm widget status in sys fs */
761 static ssize_t
dapm_widget_show(struct device
*dev
,
762 struct device_attribute
*attr
, char *buf
)
764 struct snd_soc_device
*devdata
= dev_get_drvdata(dev
);
765 struct snd_soc_codec
*codec
= devdata
->codec
;
766 struct snd_soc_dapm_widget
*w
;
768 char *state
= "not set";
770 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
772 /* only display widgets that burnm power */
774 case snd_soc_dapm_hp
:
775 case snd_soc_dapm_mic
:
776 case snd_soc_dapm_spk
:
777 case snd_soc_dapm_line
:
778 case snd_soc_dapm_micbias
:
779 case snd_soc_dapm_dac
:
780 case snd_soc_dapm_adc
:
781 case snd_soc_dapm_pga
:
782 case snd_soc_dapm_mixer
:
784 count
+= sprintf(buf
+ count
, "%s: %s\n",
785 w
->name
, w
->power
? "On":"Off");
792 switch (codec
->bias_level
) {
793 case SND_SOC_BIAS_ON
:
796 case SND_SOC_BIAS_PREPARE
:
799 case SND_SOC_BIAS_STANDBY
:
802 case SND_SOC_BIAS_OFF
:
806 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
811 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
813 /* pop/click delay times */
814 static ssize_t
dapm_pop_time_show(struct device
*dev
,
815 struct device_attribute
*attr
, char *buf
)
817 return sprintf(buf
, "%d\n", pop_time
);
820 static ssize_t
dapm_pop_time_store(struct device
*dev
,
821 struct device_attribute
*attr
,
822 const char *buf
, size_t count
)
827 if (strict_strtoul(buf
, 10, &val
) >= 0)
830 printk(KERN_ERR
"Unable to parse pop_time setting\n");
835 static DEVICE_ATTR(dapm_pop_time
, 0744, dapm_pop_time_show
,
836 dapm_pop_time_store
);
838 int snd_soc_dapm_sys_add(struct device
*dev
)
843 ret
= device_create_file(dev
, &dev_attr_dapm_widget
);
846 ret
= device_create_file(dev
, &dev_attr_dapm_pop_time
);
852 static void snd_soc_dapm_sys_remove(struct device
*dev
)
855 device_remove_file(dev
, &dev_attr_dapm_pop_time
);
856 device_remove_file(dev
, &dev_attr_dapm_widget
);
860 /* free all dapm widgets and resources */
861 static void dapm_free_widgets(struct snd_soc_codec
*codec
)
863 struct snd_soc_dapm_widget
*w
, *next_w
;
864 struct snd_soc_dapm_path
*p
, *next_p
;
866 list_for_each_entry_safe(w
, next_w
, &codec
->dapm_widgets
, list
) {
871 list_for_each_entry_safe(p
, next_p
, &codec
->dapm_paths
, list
) {
878 static int snd_soc_dapm_set_pin(struct snd_soc_codec
*codec
,
879 char *pin
, int status
)
881 struct snd_soc_dapm_widget
*w
;
883 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
884 if (!strcmp(w
->name
, pin
)) {
885 pr_debug("dapm: %s: pin %s\n", codec
->name
, pin
);
886 w
->connected
= status
;
891 pr_err("dapm: %s: configuring unknown pin %s\n", codec
->name
, pin
);
896 * snd_soc_dapm_sync - scan and power dapm paths
897 * @codec: audio codec
899 * Walks all dapm audio paths and powers widgets according to their
900 * stream or path usage.
902 * Returns 0 for success.
904 int snd_soc_dapm_sync(struct snd_soc_codec
*codec
)
906 int ret
= dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
907 dump_dapm(codec
, "sync");
910 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
912 static int snd_soc_dapm_add_route(struct snd_soc_codec
*codec
,
913 const char *sink
, const char *control
, const char *source
)
915 struct snd_soc_dapm_path
*path
;
916 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
919 /* find src and dest widgets */
920 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
922 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
926 if (!wsource
&& !(strcmp(w
->name
, source
))) {
931 if (wsource
== NULL
|| wsink
== NULL
)
934 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
938 path
->source
= wsource
;
940 INIT_LIST_HEAD(&path
->list
);
941 INIT_LIST_HEAD(&path
->list_source
);
942 INIT_LIST_HEAD(&path
->list_sink
);
944 /* check for external widgets */
945 if (wsink
->id
== snd_soc_dapm_input
) {
946 if (wsource
->id
== snd_soc_dapm_micbias
||
947 wsource
->id
== snd_soc_dapm_mic
||
948 wsink
->id
== snd_soc_dapm_line
||
949 wsink
->id
== snd_soc_dapm_output
)
952 if (wsource
->id
== snd_soc_dapm_output
) {
953 if (wsink
->id
== snd_soc_dapm_spk
||
954 wsink
->id
== snd_soc_dapm_hp
||
955 wsink
->id
== snd_soc_dapm_line
||
956 wsink
->id
== snd_soc_dapm_input
)
960 /* connect static paths */
961 if (control
== NULL
) {
962 list_add(&path
->list
, &codec
->dapm_paths
);
963 list_add(&path
->list_sink
, &wsink
->sources
);
964 list_add(&path
->list_source
, &wsource
->sinks
);
969 /* connect dynamic paths */
971 case snd_soc_dapm_adc
:
972 case snd_soc_dapm_dac
:
973 case snd_soc_dapm_pga
:
974 case snd_soc_dapm_input
:
975 case snd_soc_dapm_output
:
976 case snd_soc_dapm_micbias
:
977 case snd_soc_dapm_vmid
:
978 case snd_soc_dapm_pre
:
979 case snd_soc_dapm_post
:
980 list_add(&path
->list
, &codec
->dapm_paths
);
981 list_add(&path
->list_sink
, &wsink
->sources
);
982 list_add(&path
->list_source
, &wsource
->sinks
);
985 case snd_soc_dapm_mux
:
986 ret
= dapm_connect_mux(codec
, wsource
, wsink
, path
, control
,
987 &wsink
->kcontrols
[0]);
991 case snd_soc_dapm_switch
:
992 case snd_soc_dapm_mixer
:
993 ret
= dapm_connect_mixer(codec
, wsource
, wsink
, path
, control
);
997 case snd_soc_dapm_hp
:
998 case snd_soc_dapm_mic
:
999 case snd_soc_dapm_line
:
1000 case snd_soc_dapm_spk
:
1001 list_add(&path
->list
, &codec
->dapm_paths
);
1002 list_add(&path
->list_sink
, &wsink
->sources
);
1003 list_add(&path
->list_source
, &wsource
->sinks
);
1010 printk(KERN_WARNING
"asoc: no dapm match for %s --> %s --> %s\n", source
,
1017 * snd_soc_dapm_connect_input - connect dapm widgets
1018 * @codec: audio codec
1019 * @sink: name of target widget
1020 * @control: mixer control name
1021 * @source: name of source name
1023 * Connects 2 dapm widgets together via a named audio path. The sink is
1024 * the widget receiving the audio signal, whilst the source is the sender
1025 * of the audio signal.
1027 * This function has been deprecated in favour of snd_soc_dapm_add_routes().
1029 * Returns 0 for success else error.
1031 int snd_soc_dapm_connect_input(struct snd_soc_codec
*codec
, const char *sink
,
1032 const char *control
, const char *source
)
1034 return snd_soc_dapm_add_route(codec
, sink
, control
, source
);
1036 EXPORT_SYMBOL_GPL(snd_soc_dapm_connect_input
);
1039 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1041 * @route: audio routes
1042 * @num: number of routes
1044 * Connects 2 dapm widgets together via a named audio path. The sink is
1045 * the widget receiving the audio signal, whilst the source is the sender
1046 * of the audio signal.
1048 * Returns 0 for success else error. On error all resources can be freed
1049 * with a call to snd_soc_card_free().
1051 int snd_soc_dapm_add_routes(struct snd_soc_codec
*codec
,
1052 const struct snd_soc_dapm_route
*route
, int num
)
1056 for (i
= 0; i
< num
; i
++) {
1057 ret
= snd_soc_dapm_add_route(codec
, route
->sink
,
1058 route
->control
, route
->source
);
1060 printk(KERN_ERR
"Failed to add route %s->%s\n",
1070 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
1073 * snd_soc_dapm_new_widgets - add new dapm widgets
1074 * @codec: audio codec
1076 * Checks the codec for any new dapm widgets and creates them if found.
1078 * Returns 0 for success.
1080 int snd_soc_dapm_new_widgets(struct snd_soc_codec
*codec
)
1082 struct snd_soc_dapm_widget
*w
;
1084 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1090 case snd_soc_dapm_switch
:
1091 case snd_soc_dapm_mixer
:
1092 dapm_new_mixer(codec
, w
);
1094 case snd_soc_dapm_mux
:
1095 dapm_new_mux(codec
, w
);
1097 case snd_soc_dapm_adc
:
1098 case snd_soc_dapm_dac
:
1099 case snd_soc_dapm_pga
:
1100 dapm_new_pga(codec
, w
);
1102 case snd_soc_dapm_input
:
1103 case snd_soc_dapm_output
:
1104 case snd_soc_dapm_micbias
:
1105 case snd_soc_dapm_spk
:
1106 case snd_soc_dapm_hp
:
1107 case snd_soc_dapm_mic
:
1108 case snd_soc_dapm_line
:
1109 case snd_soc_dapm_vmid
:
1110 case snd_soc_dapm_pre
:
1111 case snd_soc_dapm_post
:
1117 dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
1120 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
1123 * snd_soc_dapm_get_volsw - dapm mixer get callback
1124 * @kcontrol: mixer control
1125 * @uinfo: control element information
1127 * Callback to get the value of a dapm mixer control.
1129 * Returns 0 for success.
1131 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
1132 struct snd_ctl_elem_value
*ucontrol
)
1134 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1135 int reg
= kcontrol
->private_value
& 0xff;
1136 int shift
= (kcontrol
->private_value
>> 8) & 0x0f;
1137 int rshift
= (kcontrol
->private_value
>> 12) & 0x0f;
1138 int max
= (kcontrol
->private_value
>> 16) & 0xff;
1139 int invert
= (kcontrol
->private_value
>> 24) & 0x01;
1140 int mask
= (1 << fls(max
)) - 1;
1142 /* return the saved value if we are powered down */
1143 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1144 ucontrol
->value
.integer
.value
[0] = widget
->saved_value
;
1148 ucontrol
->value
.integer
.value
[0] =
1149 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
1150 if (shift
!= rshift
)
1151 ucontrol
->value
.integer
.value
[1] =
1152 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
1154 ucontrol
->value
.integer
.value
[0] =
1155 max
- ucontrol
->value
.integer
.value
[0];
1156 if (shift
!= rshift
)
1157 ucontrol
->value
.integer
.value
[1] =
1158 max
- ucontrol
->value
.integer
.value
[1];
1163 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
1166 * snd_soc_dapm_put_volsw - dapm mixer set callback
1167 * @kcontrol: mixer control
1168 * @uinfo: control element information
1170 * Callback to set the value of a dapm mixer control.
1172 * Returns 0 for success.
1174 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
1175 struct snd_ctl_elem_value
*ucontrol
)
1177 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1178 int reg
= kcontrol
->private_value
& 0xff;
1179 int shift
= (kcontrol
->private_value
>> 8) & 0x0f;
1180 int rshift
= (kcontrol
->private_value
>> 12) & 0x0f;
1181 int max
= (kcontrol
->private_value
>> 16) & 0xff;
1182 int mask
= (1 << fls(max
)) - 1;
1183 int invert
= (kcontrol
->private_value
>> 24) & 0x01;
1184 unsigned short val
, val2
, val_mask
;
1187 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1191 val_mask
= mask
<< shift
;
1193 if (shift
!= rshift
) {
1194 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1197 val_mask
|= mask
<< rshift
;
1198 val
|= val2
<< rshift
;
1201 mutex_lock(&widget
->codec
->mutex
);
1202 widget
->value
= val
;
1204 /* save volume value if the widget is powered down */
1205 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1206 widget
->saved_value
= val
;
1207 mutex_unlock(&widget
->codec
->mutex
);
1211 dapm_mixer_update_power(widget
, kcontrol
, reg
, val_mask
, val
, invert
);
1212 if (widget
->event
) {
1213 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1214 ret
= widget
->event(widget
, kcontrol
,
1215 SND_SOC_DAPM_PRE_REG
);
1221 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1222 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1223 ret
= widget
->event(widget
, kcontrol
,
1224 SND_SOC_DAPM_POST_REG
);
1226 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1229 mutex_unlock(&widget
->codec
->mutex
);
1232 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
1235 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1236 * @kcontrol: mixer control
1237 * @uinfo: control element information
1239 * Callback to get the value of a dapm enumerated double mixer control.
1241 * Returns 0 for success.
1243 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
1244 struct snd_ctl_elem_value
*ucontrol
)
1246 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1247 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1248 unsigned short val
, bitmask
;
1250 for (bitmask
= 1; bitmask
< e
->mask
; bitmask
<<= 1)
1252 val
= snd_soc_read(widget
->codec
, e
->reg
);
1253 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
1254 if (e
->shift_l
!= e
->shift_r
)
1255 ucontrol
->value
.enumerated
.item
[1] =
1256 (val
>> e
->shift_r
) & (bitmask
- 1);
1260 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
1263 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1264 * @kcontrol: mixer control
1265 * @uinfo: control element information
1267 * Callback to set the value of a dapm enumerated double mixer control.
1269 * Returns 0 for success.
1271 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
1272 struct snd_ctl_elem_value
*ucontrol
)
1274 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1275 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1276 unsigned short val
, mux
;
1277 unsigned short mask
, bitmask
;
1280 for (bitmask
= 1; bitmask
< e
->mask
; bitmask
<<= 1)
1282 if (ucontrol
->value
.enumerated
.item
[0] > e
->mask
- 1)
1284 mux
= ucontrol
->value
.enumerated
.item
[0];
1285 val
= mux
<< e
->shift_l
;
1286 mask
= (bitmask
- 1) << e
->shift_l
;
1287 if (e
->shift_l
!= e
->shift_r
) {
1288 if (ucontrol
->value
.enumerated
.item
[1] > e
->mask
- 1)
1290 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1291 mask
|= (bitmask
- 1) << e
->shift_r
;
1294 mutex_lock(&widget
->codec
->mutex
);
1295 widget
->value
= val
;
1296 dapm_mux_update_power(widget
, kcontrol
, mask
, mux
, e
);
1297 if (widget
->event
) {
1298 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1299 ret
= widget
->event(widget
,
1300 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1304 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1305 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1306 ret
= widget
->event(widget
,
1307 kcontrol
, SND_SOC_DAPM_POST_REG
);
1309 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1312 mutex_unlock(&widget
->codec
->mutex
);
1315 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
1318 * snd_soc_dapm_new_control - create new dapm control
1319 * @codec: audio codec
1320 * @widget: widget template
1322 * Creates a new dapm control based upon the template.
1324 * Returns 0 for success else error.
1326 int snd_soc_dapm_new_control(struct snd_soc_codec
*codec
,
1327 const struct snd_soc_dapm_widget
*widget
)
1329 struct snd_soc_dapm_widget
*w
;
1331 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
1335 INIT_LIST_HEAD(&w
->sources
);
1336 INIT_LIST_HEAD(&w
->sinks
);
1337 INIT_LIST_HEAD(&w
->list
);
1338 list_add(&w
->list
, &codec
->dapm_widgets
);
1340 /* machine layer set ups unconnected pins and insertions */
1344 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
1347 * snd_soc_dapm_new_controls - create new dapm controls
1348 * @codec: audio codec
1349 * @widget: widget array
1350 * @num: number of widgets
1352 * Creates new DAPM controls based upon the templates.
1354 * Returns 0 for success else error.
1356 int snd_soc_dapm_new_controls(struct snd_soc_codec
*codec
,
1357 const struct snd_soc_dapm_widget
*widget
,
1362 for (i
= 0; i
< num
; i
++) {
1363 ret
= snd_soc_dapm_new_control(codec
, widget
);
1370 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
1374 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1375 * @codec: audio codec
1376 * @stream: stream name
1377 * @event: stream event
1379 * Sends a stream event to the dapm core. The core then makes any
1380 * necessary widget power changes.
1382 * Returns 0 for success else error.
1384 int snd_soc_dapm_stream_event(struct snd_soc_codec
*codec
,
1385 char *stream
, int event
)
1387 struct snd_soc_dapm_widget
*w
;
1392 mutex_lock(&codec
->mutex
);
1393 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1397 pr_debug("widget %s\n %s stream %s event %d\n",
1398 w
->name
, w
->sname
, stream
, event
);
1399 if (strstr(w
->sname
, stream
)) {
1401 case SND_SOC_DAPM_STREAM_START
:
1404 case SND_SOC_DAPM_STREAM_STOP
:
1407 case SND_SOC_DAPM_STREAM_SUSPEND
:
1412 case SND_SOC_DAPM_STREAM_RESUME
:
1418 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
1420 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
1425 mutex_unlock(&codec
->mutex
);
1427 dapm_power_widgets(codec
, event
);
1428 dump_dapm(codec
, __func__
);
1431 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event
);
1434 * snd_soc_dapm_set_bias_level - set the bias level for the system
1435 * @socdev: audio device
1436 * @level: level to configure
1438 * Configure the bias (power) levels for the SoC audio device.
1440 * Returns 0 for success else error.
1442 int snd_soc_dapm_set_bias_level(struct snd_soc_device
*socdev
,
1443 enum snd_soc_bias_level level
)
1445 struct snd_soc_codec
*codec
= socdev
->codec
;
1446 struct snd_soc_machine
*machine
= socdev
->machine
;
1449 if (machine
->set_bias_level
)
1450 ret
= machine
->set_bias_level(machine
, level
);
1451 if (ret
== 0 && codec
->set_bias_level
)
1452 ret
= codec
->set_bias_level(codec
, level
);
1458 * snd_soc_dapm_enable_pin - enable pin.
1459 * @snd_soc_codec: SoC codec
1462 * Enables input/output pin and it's parents or children widgets iff there is
1463 * a valid audio route and active audio stream.
1464 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1465 * do any widget power switching.
1467 int snd_soc_dapm_enable_pin(struct snd_soc_codec
*codec
, char *pin
)
1469 return snd_soc_dapm_set_pin(codec
, pin
, 1);
1471 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
1474 * snd_soc_dapm_disable_pin - disable pin.
1478 * Disables input/output pin and it's parents or children widgets.
1479 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1480 * do any widget power switching.
1482 int snd_soc_dapm_disable_pin(struct snd_soc_codec
*codec
, char *pin
)
1484 return snd_soc_dapm_set_pin(codec
, pin
, 0);
1486 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
1489 * snd_soc_dapm_get_pin_status - get audio pin status
1490 * @codec: audio codec
1491 * @pin: audio signal pin endpoint (or start point)
1493 * Get audio pin status - connected or disconnected.
1495 * Returns 1 for connected otherwise 0.
1497 int snd_soc_dapm_get_pin_status(struct snd_soc_codec
*codec
, char *pin
)
1499 struct snd_soc_dapm_widget
*w
;
1501 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
1502 if (!strcmp(w
->name
, pin
))
1503 return w
->connected
;
1508 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
1511 * snd_soc_dapm_free - free dapm resources
1512 * @socdev: SoC device
1514 * Free all dapm widgets and resources.
1516 void snd_soc_dapm_free(struct snd_soc_device
*socdev
)
1518 struct snd_soc_codec
*codec
= socdev
->codec
;
1520 snd_soc_dapm_sys_remove(socdev
->dev
);
1521 dapm_free_widgets(codec
);
1523 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
1525 /* Module information */
1526 MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com");
1527 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1528 MODULE_LICENSE("GPL");