2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc-dapm.h>
44 #include <sound/initval.h>
48 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
50 #define dump_dapm(codec, action)
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq
[] = {
55 snd_soc_dapm_pre
, snd_soc_dapm_micbias
, snd_soc_dapm_mic
,
56 snd_soc_dapm_mux
, snd_soc_dapm_dac
, snd_soc_dapm_mixer
, snd_soc_dapm_pga
,
57 snd_soc_dapm_adc
, snd_soc_dapm_hp
, snd_soc_dapm_spk
, snd_soc_dapm_post
59 static int dapm_down_seq
[] = {
60 snd_soc_dapm_pre
, snd_soc_dapm_adc
, snd_soc_dapm_hp
, snd_soc_dapm_spk
,
61 snd_soc_dapm_pga
, snd_soc_dapm_mixer
, snd_soc_dapm_dac
, snd_soc_dapm_mic
,
62 snd_soc_dapm_micbias
, snd_soc_dapm_mux
, snd_soc_dapm_post
65 static int dapm_status
= 1;
66 module_param(dapm_status
, int, 0);
67 MODULE_PARM_DESC(dapm_status
, "enable DPM sysfs entries");
69 static void pop_wait(u32 pop_time
)
72 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time
));
75 static void pop_dbg(u32 pop_time
, const char *fmt
, ...)
89 /* create a new dapm widget */
90 static inline struct snd_soc_dapm_widget
*dapm_cnew_widget(
91 const struct snd_soc_dapm_widget
*_widget
)
93 return kmemdup(_widget
, sizeof(*_widget
), GFP_KERNEL
);
96 /* set up initial codec paths */
97 static void dapm_set_path_status(struct snd_soc_dapm_widget
*w
,
98 struct snd_soc_dapm_path
*p
, int i
)
101 case snd_soc_dapm_switch
:
102 case snd_soc_dapm_mixer
: {
104 struct soc_mixer_control
*mc
= (struct soc_mixer_control
*)
105 w
->kcontrols
[i
].private_value
;
106 unsigned int reg
= mc
->reg
;
107 unsigned int shift
= mc
->shift
;
109 unsigned int mask
= (1 << fls(max
)) - 1;
110 unsigned int invert
= mc
->invert
;
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
->max
; 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
->max
; 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
->max
; 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(codec
->pop_time
, "pop test %s : %s in %d ms\n",
229 widget
->name
, widget
->power
? "on" : "off",
231 snd_soc_write(codec
, widget
->reg
, new);
232 pop_wait(codec
->pop_time
);
234 pr_debug("reg %x old %x new %x change %d\n", widget
->reg
,
239 /* ramps the volume up or down to minimise pops before or after a
240 * DAPM power event */
241 static int dapm_set_pga(struct snd_soc_dapm_widget
*widget
, int power
)
243 const struct snd_kcontrol_new
*k
= widget
->kcontrols
;
245 if (widget
->muted
&& !power
)
247 if (!widget
->muted
&& power
)
250 if (widget
->num_kcontrols
&& k
) {
251 struct soc_mixer_control
*mc
=
252 (struct soc_mixer_control
*)k
->private_value
;
253 unsigned int reg
= mc
->reg
;
254 unsigned int shift
= mc
->shift
;
256 unsigned int mask
= (1 << fls(max
)) - 1;
257 unsigned int invert
= mc
->invert
;
261 /* power up has happended, increase volume to last level */
263 for (i
= max
; i
> widget
->saved_value
; i
--)
264 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
266 for (i
= 0; i
< widget
->saved_value
; i
++)
267 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
271 /* power down is about to occur, decrease volume to mute */
272 int val
= snd_soc_read(widget
->codec
, reg
);
273 int i
= widget
->saved_value
= (val
>> shift
) & mask
;
275 for (; i
< mask
; i
++)
276 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
279 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
287 /* create new dapm mixer control */
288 static int dapm_new_mixer(struct snd_soc_codec
*codec
,
289 struct snd_soc_dapm_widget
*w
)
293 struct snd_soc_dapm_path
*path
;
296 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
299 list_for_each_entry(path
, &w
->sources
, list_sink
) {
301 /* mixer/mux paths name must match control name */
302 if (path
->name
!= (char*)w
->kcontrols
[i
].name
)
305 /* add dapm control with long name */
306 name_len
= 2 + strlen(w
->name
)
307 + strlen(w
->kcontrols
[i
].name
);
308 path
->long_name
= kmalloc(name_len
, GFP_KERNEL
);
309 if (path
->long_name
== NULL
)
312 snprintf(path
->long_name
, name_len
, "%s %s",
313 w
->name
, w
->kcontrols
[i
].name
);
314 path
->long_name
[name_len
- 1] = '\0';
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 mux
, 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
[mux
])
716 /* we now need to match the string in the enum to the path */
717 if (!(strcmp(path
->name
, e
->texts
[mux
])))
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
)
827 return device_create_file(dev
, &dev_attr_dapm_widget
);
830 static void snd_soc_dapm_sys_remove(struct device
*dev
)
833 device_remove_file(dev
, &dev_attr_dapm_widget
);
837 /* free all dapm widgets and resources */
838 static void dapm_free_widgets(struct snd_soc_codec
*codec
)
840 struct snd_soc_dapm_widget
*w
, *next_w
;
841 struct snd_soc_dapm_path
*p
, *next_p
;
843 list_for_each_entry_safe(w
, next_w
, &codec
->dapm_widgets
, list
) {
848 list_for_each_entry_safe(p
, next_p
, &codec
->dapm_paths
, list
) {
855 static int snd_soc_dapm_set_pin(struct snd_soc_codec
*codec
,
856 char *pin
, int status
)
858 struct snd_soc_dapm_widget
*w
;
860 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
861 if (!strcmp(w
->name
, pin
)) {
862 pr_debug("dapm: %s: pin %s\n", codec
->name
, pin
);
863 w
->connected
= status
;
868 pr_err("dapm: %s: configuring unknown pin %s\n", codec
->name
, pin
);
873 * snd_soc_dapm_sync - scan and power dapm paths
874 * @codec: audio codec
876 * Walks all dapm audio paths and powers widgets according to their
877 * stream or path usage.
879 * Returns 0 for success.
881 int snd_soc_dapm_sync(struct snd_soc_codec
*codec
)
883 int ret
= dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
884 dump_dapm(codec
, "sync");
887 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
889 static int snd_soc_dapm_add_route(struct snd_soc_codec
*codec
,
890 const char *sink
, const char *control
, const char *source
)
892 struct snd_soc_dapm_path
*path
;
893 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
896 /* find src and dest widgets */
897 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
899 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
903 if (!wsource
&& !(strcmp(w
->name
, source
))) {
908 if (wsource
== NULL
|| wsink
== NULL
)
911 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
915 path
->source
= wsource
;
917 INIT_LIST_HEAD(&path
->list
);
918 INIT_LIST_HEAD(&path
->list_source
);
919 INIT_LIST_HEAD(&path
->list_sink
);
921 /* check for external widgets */
922 if (wsink
->id
== snd_soc_dapm_input
) {
923 if (wsource
->id
== snd_soc_dapm_micbias
||
924 wsource
->id
== snd_soc_dapm_mic
||
925 wsink
->id
== snd_soc_dapm_line
||
926 wsink
->id
== snd_soc_dapm_output
)
929 if (wsource
->id
== snd_soc_dapm_output
) {
930 if (wsink
->id
== snd_soc_dapm_spk
||
931 wsink
->id
== snd_soc_dapm_hp
||
932 wsink
->id
== snd_soc_dapm_line
||
933 wsink
->id
== snd_soc_dapm_input
)
937 /* connect static paths */
938 if (control
== NULL
) {
939 list_add(&path
->list
, &codec
->dapm_paths
);
940 list_add(&path
->list_sink
, &wsink
->sources
);
941 list_add(&path
->list_source
, &wsource
->sinks
);
946 /* connect dynamic paths */
948 case snd_soc_dapm_adc
:
949 case snd_soc_dapm_dac
:
950 case snd_soc_dapm_pga
:
951 case snd_soc_dapm_input
:
952 case snd_soc_dapm_output
:
953 case snd_soc_dapm_micbias
:
954 case snd_soc_dapm_vmid
:
955 case snd_soc_dapm_pre
:
956 case snd_soc_dapm_post
:
957 list_add(&path
->list
, &codec
->dapm_paths
);
958 list_add(&path
->list_sink
, &wsink
->sources
);
959 list_add(&path
->list_source
, &wsource
->sinks
);
962 case snd_soc_dapm_mux
:
963 ret
= dapm_connect_mux(codec
, wsource
, wsink
, path
, control
,
964 &wsink
->kcontrols
[0]);
968 case snd_soc_dapm_switch
:
969 case snd_soc_dapm_mixer
:
970 ret
= dapm_connect_mixer(codec
, wsource
, wsink
, path
, control
);
974 case snd_soc_dapm_hp
:
975 case snd_soc_dapm_mic
:
976 case snd_soc_dapm_line
:
977 case snd_soc_dapm_spk
:
978 list_add(&path
->list
, &codec
->dapm_paths
);
979 list_add(&path
->list_sink
, &wsink
->sources
);
980 list_add(&path
->list_source
, &wsource
->sinks
);
987 printk(KERN_WARNING
"asoc: no dapm match for %s --> %s --> %s\n", source
,
994 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
996 * @route: audio routes
997 * @num: number of routes
999 * Connects 2 dapm widgets together via a named audio path. The sink is
1000 * the widget receiving the audio signal, whilst the source is the sender
1001 * of the audio signal.
1003 * Returns 0 for success else error. On error all resources can be freed
1004 * with a call to snd_soc_card_free().
1006 int snd_soc_dapm_add_routes(struct snd_soc_codec
*codec
,
1007 const struct snd_soc_dapm_route
*route
, int num
)
1011 for (i
= 0; i
< num
; i
++) {
1012 ret
= snd_soc_dapm_add_route(codec
, route
->sink
,
1013 route
->control
, route
->source
);
1015 printk(KERN_ERR
"Failed to add route %s->%s\n",
1025 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
1028 * snd_soc_dapm_new_widgets - add new dapm widgets
1029 * @codec: audio codec
1031 * Checks the codec for any new dapm widgets and creates them if found.
1033 * Returns 0 for success.
1035 int snd_soc_dapm_new_widgets(struct snd_soc_codec
*codec
)
1037 struct snd_soc_dapm_widget
*w
;
1039 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1045 case snd_soc_dapm_switch
:
1046 case snd_soc_dapm_mixer
:
1047 dapm_new_mixer(codec
, w
);
1049 case snd_soc_dapm_mux
:
1050 dapm_new_mux(codec
, w
);
1052 case snd_soc_dapm_adc
:
1053 case snd_soc_dapm_dac
:
1054 case snd_soc_dapm_pga
:
1055 dapm_new_pga(codec
, w
);
1057 case snd_soc_dapm_input
:
1058 case snd_soc_dapm_output
:
1059 case snd_soc_dapm_micbias
:
1060 case snd_soc_dapm_spk
:
1061 case snd_soc_dapm_hp
:
1062 case snd_soc_dapm_mic
:
1063 case snd_soc_dapm_line
:
1064 case snd_soc_dapm_vmid
:
1065 case snd_soc_dapm_pre
:
1066 case snd_soc_dapm_post
:
1072 dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
1075 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
1078 * snd_soc_dapm_get_volsw - dapm mixer get callback
1079 * @kcontrol: mixer control
1080 * @uinfo: control element information
1082 * Callback to get the value of a dapm mixer control.
1084 * Returns 0 for success.
1086 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
1087 struct snd_ctl_elem_value
*ucontrol
)
1089 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1090 struct soc_mixer_control
*mc
=
1091 (struct soc_mixer_control
*)kcontrol
->private_value
;
1092 unsigned int reg
= mc
->reg
;
1093 unsigned int shift
= mc
->shift
;
1094 unsigned int rshift
= mc
->rshift
;
1096 unsigned int invert
= mc
->invert
;
1097 unsigned int mask
= (1 << fls(max
)) - 1;
1099 /* return the saved value if we are powered down */
1100 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1101 ucontrol
->value
.integer
.value
[0] = widget
->saved_value
;
1105 ucontrol
->value
.integer
.value
[0] =
1106 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
1107 if (shift
!= rshift
)
1108 ucontrol
->value
.integer
.value
[1] =
1109 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
1111 ucontrol
->value
.integer
.value
[0] =
1112 max
- ucontrol
->value
.integer
.value
[0];
1113 if (shift
!= rshift
)
1114 ucontrol
->value
.integer
.value
[1] =
1115 max
- ucontrol
->value
.integer
.value
[1];
1120 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
1123 * snd_soc_dapm_put_volsw - dapm mixer set callback
1124 * @kcontrol: mixer control
1125 * @uinfo: control element information
1127 * Callback to set the value of a dapm mixer control.
1129 * Returns 0 for success.
1131 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
1132 struct snd_ctl_elem_value
*ucontrol
)
1134 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1135 struct soc_mixer_control
*mc
=
1136 (struct soc_mixer_control
*)kcontrol
->private_value
;
1137 unsigned int reg
= mc
->reg
;
1138 unsigned int shift
= mc
->shift
;
1139 unsigned int rshift
= mc
->rshift
;
1141 unsigned int mask
= (1 << fls(max
)) - 1;
1142 unsigned int invert
= mc
->invert
;
1143 unsigned short val
, val2
, val_mask
;
1146 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1150 val_mask
= mask
<< shift
;
1152 if (shift
!= rshift
) {
1153 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1156 val_mask
|= mask
<< rshift
;
1157 val
|= val2
<< rshift
;
1160 mutex_lock(&widget
->codec
->mutex
);
1161 widget
->value
= val
;
1163 /* save volume value if the widget is powered down */
1164 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1165 widget
->saved_value
= val
;
1166 mutex_unlock(&widget
->codec
->mutex
);
1170 dapm_mixer_update_power(widget
, kcontrol
, reg
, val_mask
, val
, invert
);
1171 if (widget
->event
) {
1172 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1173 ret
= widget
->event(widget
, kcontrol
,
1174 SND_SOC_DAPM_PRE_REG
);
1180 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1181 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1182 ret
= widget
->event(widget
, kcontrol
,
1183 SND_SOC_DAPM_POST_REG
);
1185 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1188 mutex_unlock(&widget
->codec
->mutex
);
1191 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
1194 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1195 * @kcontrol: mixer control
1196 * @uinfo: control element information
1198 * Callback to get the value of a dapm enumerated double mixer control.
1200 * Returns 0 for success.
1202 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
1203 struct snd_ctl_elem_value
*ucontrol
)
1205 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1206 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1207 unsigned short val
, bitmask
;
1209 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1211 val
= snd_soc_read(widget
->codec
, e
->reg
);
1212 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
1213 if (e
->shift_l
!= e
->shift_r
)
1214 ucontrol
->value
.enumerated
.item
[1] =
1215 (val
>> e
->shift_r
) & (bitmask
- 1);
1219 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
1222 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1223 * @kcontrol: mixer control
1224 * @uinfo: control element information
1226 * Callback to set the value of a dapm enumerated double mixer control.
1228 * Returns 0 for success.
1230 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
1231 struct snd_ctl_elem_value
*ucontrol
)
1233 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1234 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1235 unsigned short val
, mux
;
1236 unsigned short mask
, bitmask
;
1239 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1241 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1243 mux
= ucontrol
->value
.enumerated
.item
[0];
1244 val
= mux
<< e
->shift_l
;
1245 mask
= (bitmask
- 1) << e
->shift_l
;
1246 if (e
->shift_l
!= e
->shift_r
) {
1247 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1249 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1250 mask
|= (bitmask
- 1) << e
->shift_r
;
1253 mutex_lock(&widget
->codec
->mutex
);
1254 widget
->value
= val
;
1255 dapm_mux_update_power(widget
, kcontrol
, mask
, mux
, val
, e
);
1256 if (widget
->event
) {
1257 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1258 ret
= widget
->event(widget
,
1259 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1263 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1264 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1265 ret
= widget
->event(widget
,
1266 kcontrol
, SND_SOC_DAPM_POST_REG
);
1268 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1271 mutex_unlock(&widget
->codec
->mutex
);
1274 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
1277 * snd_soc_dapm_new_control - create new dapm control
1278 * @codec: audio codec
1279 * @widget: widget template
1281 * Creates a new dapm control based upon the template.
1283 * Returns 0 for success else error.
1285 int snd_soc_dapm_new_control(struct snd_soc_codec
*codec
,
1286 const struct snd_soc_dapm_widget
*widget
)
1288 struct snd_soc_dapm_widget
*w
;
1290 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
1294 INIT_LIST_HEAD(&w
->sources
);
1295 INIT_LIST_HEAD(&w
->sinks
);
1296 INIT_LIST_HEAD(&w
->list
);
1297 list_add(&w
->list
, &codec
->dapm_widgets
);
1299 /* machine layer set ups unconnected pins and insertions */
1303 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
1306 * snd_soc_dapm_new_controls - create new dapm controls
1307 * @codec: audio codec
1308 * @widget: widget array
1309 * @num: number of widgets
1311 * Creates new DAPM controls based upon the templates.
1313 * Returns 0 for success else error.
1315 int snd_soc_dapm_new_controls(struct snd_soc_codec
*codec
,
1316 const struct snd_soc_dapm_widget
*widget
,
1321 for (i
= 0; i
< num
; i
++) {
1322 ret
= snd_soc_dapm_new_control(codec
, widget
);
1329 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
1333 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1334 * @codec: audio codec
1335 * @stream: stream name
1336 * @event: stream event
1338 * Sends a stream event to the dapm core. The core then makes any
1339 * necessary widget power changes.
1341 * Returns 0 for success else error.
1343 int snd_soc_dapm_stream_event(struct snd_soc_codec
*codec
,
1344 char *stream
, int event
)
1346 struct snd_soc_dapm_widget
*w
;
1351 mutex_lock(&codec
->mutex
);
1352 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1356 pr_debug("widget %s\n %s stream %s event %d\n",
1357 w
->name
, w
->sname
, stream
, event
);
1358 if (strstr(w
->sname
, stream
)) {
1360 case SND_SOC_DAPM_STREAM_START
:
1363 case SND_SOC_DAPM_STREAM_STOP
:
1366 case SND_SOC_DAPM_STREAM_SUSPEND
:
1371 case SND_SOC_DAPM_STREAM_RESUME
:
1377 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
1379 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
1384 mutex_unlock(&codec
->mutex
);
1386 dapm_power_widgets(codec
, event
);
1387 dump_dapm(codec
, __func__
);
1390 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event
);
1393 * snd_soc_dapm_set_bias_level - set the bias level for the system
1394 * @socdev: audio device
1395 * @level: level to configure
1397 * Configure the bias (power) levels for the SoC audio device.
1399 * Returns 0 for success else error.
1401 int snd_soc_dapm_set_bias_level(struct snd_soc_device
*socdev
,
1402 enum snd_soc_bias_level level
)
1404 struct snd_soc_codec
*codec
= socdev
->codec
;
1405 struct snd_soc_card
*card
= socdev
->card
;
1408 if (card
->set_bias_level
)
1409 ret
= card
->set_bias_level(card
, level
);
1410 if (ret
== 0 && codec
->set_bias_level
)
1411 ret
= codec
->set_bias_level(codec
, level
);
1417 * snd_soc_dapm_enable_pin - enable pin.
1418 * @snd_soc_codec: SoC codec
1421 * Enables input/output pin and it's parents or children widgets iff there is
1422 * a valid audio route and active audio stream.
1423 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1424 * do any widget power switching.
1426 int snd_soc_dapm_enable_pin(struct snd_soc_codec
*codec
, char *pin
)
1428 return snd_soc_dapm_set_pin(codec
, pin
, 1);
1430 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
1433 * snd_soc_dapm_disable_pin - disable pin.
1437 * Disables input/output pin and it's parents or children widgets.
1438 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1439 * do any widget power switching.
1441 int snd_soc_dapm_disable_pin(struct snd_soc_codec
*codec
, char *pin
)
1443 return snd_soc_dapm_set_pin(codec
, pin
, 0);
1445 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
1448 * snd_soc_dapm_nc_pin - permanently disable pin.
1452 * Marks the specified pin as being not connected, disabling it along
1453 * any parent or child widgets. At present this is identical to
1454 * snd_soc_dapm_disable_pin() but in future it will be extended to do
1455 * additional things such as disabling controls which only affect
1456 * paths through the pin.
1458 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1459 * do any widget power switching.
1461 int snd_soc_dapm_nc_pin(struct snd_soc_codec
*codec
, char *pin
)
1463 return snd_soc_dapm_set_pin(codec
, pin
, 0);
1465 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin
);
1468 * snd_soc_dapm_get_pin_status - get audio pin status
1469 * @codec: audio codec
1470 * @pin: audio signal pin endpoint (or start point)
1472 * Get audio pin status - connected or disconnected.
1474 * Returns 1 for connected otherwise 0.
1476 int snd_soc_dapm_get_pin_status(struct snd_soc_codec
*codec
, char *pin
)
1478 struct snd_soc_dapm_widget
*w
;
1480 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
1481 if (!strcmp(w
->name
, pin
))
1482 return w
->connected
;
1487 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
1490 * snd_soc_dapm_free - free dapm resources
1491 * @socdev: SoC device
1493 * Free all dapm widgets and resources.
1495 void snd_soc_dapm_free(struct snd_soc_device
*socdev
)
1497 struct snd_soc_codec
*codec
= socdev
->codec
;
1499 snd_soc_dapm_sys_remove(socdev
->dev
);
1500 dapm_free_widgets(codec
);
1502 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
1504 /* Module information */
1505 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
1506 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1507 MODULE_LICENSE("GPL");