2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <linux/debugfs.h>
41 #include <linux/slab.h>
42 #include <sound/core.h>
43 #include <sound/pcm.h>
44 #include <sound/pcm_params.h>
45 #include <sound/soc.h>
46 #include <sound/soc-dapm.h>
47 #include <sound/initval.h>
49 #include <trace/events/asoc.h>
51 /* dapm power sequences - make this per codec in the future */
52 static int dapm_up_seq
[] = {
53 [snd_soc_dapm_pre
] = 0,
54 [snd_soc_dapm_supply
] = 1,
55 [snd_soc_dapm_micbias
] = 2,
56 [snd_soc_dapm_aif_in
] = 3,
57 [snd_soc_dapm_aif_out
] = 3,
58 [snd_soc_dapm_mic
] = 4,
59 [snd_soc_dapm_mux
] = 5,
60 [snd_soc_dapm_value_mux
] = 5,
61 [snd_soc_dapm_dac
] = 6,
62 [snd_soc_dapm_mixer
] = 7,
63 [snd_soc_dapm_mixer_named_ctl
] = 7,
64 [snd_soc_dapm_pga
] = 8,
65 [snd_soc_dapm_adc
] = 9,
66 [snd_soc_dapm_hp
] = 10,
67 [snd_soc_dapm_spk
] = 10,
68 [snd_soc_dapm_post
] = 11,
71 static int dapm_down_seq
[] = {
72 [snd_soc_dapm_pre
] = 0,
73 [snd_soc_dapm_adc
] = 1,
74 [snd_soc_dapm_hp
] = 2,
75 [snd_soc_dapm_spk
] = 2,
76 [snd_soc_dapm_pga
] = 4,
77 [snd_soc_dapm_mixer_named_ctl
] = 5,
78 [snd_soc_dapm_mixer
] = 5,
79 [snd_soc_dapm_dac
] = 6,
80 [snd_soc_dapm_mic
] = 7,
81 [snd_soc_dapm_micbias
] = 8,
82 [snd_soc_dapm_mux
] = 9,
83 [snd_soc_dapm_value_mux
] = 9,
84 [snd_soc_dapm_aif_in
] = 10,
85 [snd_soc_dapm_aif_out
] = 10,
86 [snd_soc_dapm_supply
] = 11,
87 [snd_soc_dapm_post
] = 12,
90 static void pop_wait(u32 pop_time
)
93 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time
));
96 static void pop_dbg(struct device
*dev
, u32 pop_time
, const char *fmt
, ...)
104 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
109 vsnprintf(buf
, PAGE_SIZE
, fmt
, args
);
116 /* create a new dapm widget */
117 static inline struct snd_soc_dapm_widget
*dapm_cnew_widget(
118 const struct snd_soc_dapm_widget
*_widget
)
120 return kmemdup(_widget
, sizeof(*_widget
), GFP_KERNEL
);
124 * snd_soc_dapm_set_bias_level - set the bias level for the system
125 * @card: audio device
126 * @level: level to configure
128 * Configure the bias (power) levels for the SoC audio device.
130 * Returns 0 for success else error.
132 static int snd_soc_dapm_set_bias_level(struct snd_soc_card
*card
,
133 struct snd_soc_dapm_context
*dapm
,
134 enum snd_soc_bias_level level
)
139 case SND_SOC_BIAS_ON
:
140 dev_dbg(dapm
->dev
, "Setting full bias\n");
142 case SND_SOC_BIAS_PREPARE
:
143 dev_dbg(dapm
->dev
, "Setting bias prepare\n");
145 case SND_SOC_BIAS_STANDBY
:
146 dev_dbg(dapm
->dev
, "Setting standby bias\n");
148 case SND_SOC_BIAS_OFF
:
149 dev_dbg(dapm
->dev
, "Setting bias off\n");
152 dev_err(dapm
->dev
, "Setting invalid bias %d\n", level
);
156 trace_snd_soc_bias_level_start(card
, level
);
158 if (card
&& card
->set_bias_level
)
159 ret
= card
->set_bias_level(card
, level
);
161 if (dapm
->codec
&& dapm
->codec
->driver
->set_bias_level
)
162 ret
= dapm
->codec
->driver
->set_bias_level(dapm
->codec
, level
);
164 dapm
->bias_level
= level
;
167 trace_snd_soc_bias_level_done(card
, level
);
172 /* set up initial codec paths */
173 static void dapm_set_path_status(struct snd_soc_dapm_widget
*w
,
174 struct snd_soc_dapm_path
*p
, int i
)
177 case snd_soc_dapm_switch
:
178 case snd_soc_dapm_mixer
:
179 case snd_soc_dapm_mixer_named_ctl
: {
181 struct soc_mixer_control
*mc
= (struct soc_mixer_control
*)
182 w
->kcontrols
[i
].private_value
;
183 unsigned int reg
= mc
->reg
;
184 unsigned int shift
= mc
->shift
;
186 unsigned int mask
= (1 << fls(max
)) - 1;
187 unsigned int invert
= mc
->invert
;
189 val
= snd_soc_read(w
->codec
, reg
);
190 val
= (val
>> shift
) & mask
;
192 if ((invert
&& !val
) || (!invert
&& val
))
198 case snd_soc_dapm_mux
: {
199 struct soc_enum
*e
= (struct soc_enum
*)w
->kcontrols
[i
].private_value
;
200 int val
, item
, bitmask
;
202 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
204 val
= snd_soc_read(w
->codec
, e
->reg
);
205 item
= (val
>> e
->shift_l
) & (bitmask
- 1);
208 for (i
= 0; i
< e
->max
; i
++) {
209 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
214 case snd_soc_dapm_value_mux
: {
215 struct soc_enum
*e
= (struct soc_enum
*)
216 w
->kcontrols
[i
].private_value
;
219 val
= snd_soc_read(w
->codec
, e
->reg
);
220 val
= (val
>> e
->shift_l
) & e
->mask
;
221 for (item
= 0; item
< e
->max
; item
++) {
222 if (val
== e
->values
[item
])
227 for (i
= 0; i
< e
->max
; i
++) {
228 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
233 /* does not effect routing - always connected */
234 case snd_soc_dapm_pga
:
235 case snd_soc_dapm_output
:
236 case snd_soc_dapm_adc
:
237 case snd_soc_dapm_input
:
238 case snd_soc_dapm_dac
:
239 case snd_soc_dapm_micbias
:
240 case snd_soc_dapm_vmid
:
241 case snd_soc_dapm_supply
:
242 case snd_soc_dapm_aif_in
:
243 case snd_soc_dapm_aif_out
:
246 /* does effect routing - dynamically connected */
247 case snd_soc_dapm_hp
:
248 case snd_soc_dapm_mic
:
249 case snd_soc_dapm_spk
:
250 case snd_soc_dapm_line
:
251 case snd_soc_dapm_pre
:
252 case snd_soc_dapm_post
:
258 /* connect mux widget to its interconnecting audio paths */
259 static int dapm_connect_mux(struct snd_soc_dapm_context
*dapm
,
260 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
261 struct snd_soc_dapm_path
*path
, const char *control_name
,
262 const struct snd_kcontrol_new
*kcontrol
)
264 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
267 for (i
= 0; i
< e
->max
; i
++) {
268 if (!(strcmp(control_name
, e
->texts
[i
]))) {
269 list_add(&path
->list
, &dapm
->paths
);
270 list_add(&path
->list_sink
, &dest
->sources
);
271 list_add(&path
->list_source
, &src
->sinks
);
272 path
->name
= (char*)e
->texts
[i
];
273 dapm_set_path_status(dest
, path
, 0);
281 /* connect mixer widget to its interconnecting audio paths */
282 static int dapm_connect_mixer(struct snd_soc_dapm_context
*dapm
,
283 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
284 struct snd_soc_dapm_path
*path
, const char *control_name
)
288 /* search for mixer kcontrol */
289 for (i
= 0; i
< dest
->num_kcontrols
; i
++) {
290 if (!strcmp(control_name
, dest
->kcontrols
[i
].name
)) {
291 list_add(&path
->list
, &dapm
->paths
);
292 list_add(&path
->list_sink
, &dest
->sources
);
293 list_add(&path
->list_source
, &src
->sinks
);
294 path
->name
= dest
->kcontrols
[i
].name
;
295 dapm_set_path_status(dest
, path
, i
);
302 /* update dapm codec register bits */
303 static int dapm_update_bits(struct snd_soc_dapm_widget
*widget
)
306 unsigned int old
, new;
307 struct snd_soc_codec
*codec
= widget
->codec
;
308 struct snd_soc_dapm_context
*dapm
= widget
->dapm
;
309 struct snd_soc_card
*card
= dapm
->card
;
311 /* check for valid widgets */
312 if (widget
->reg
< 0 || widget
->id
== snd_soc_dapm_input
||
313 widget
->id
== snd_soc_dapm_output
||
314 widget
->id
== snd_soc_dapm_hp
||
315 widget
->id
== snd_soc_dapm_mic
||
316 widget
->id
== snd_soc_dapm_line
||
317 widget
->id
== snd_soc_dapm_spk
)
320 power
= widget
->power
;
322 power
= (power
? 0:1);
324 old
= snd_soc_read(codec
, widget
->reg
);
325 new = (old
& ~(0x1 << widget
->shift
)) | (power
<< widget
->shift
);
329 pop_dbg(dapm
->dev
, card
->pop_time
,
330 "pop test %s : %s in %d ms\n",
331 widget
->name
, widget
->power
? "on" : "off",
333 pop_wait(card
->pop_time
);
334 snd_soc_write(codec
, widget
->reg
, new);
336 dev_dbg(dapm
->dev
, "reg %x old %x new %x change %d\n", widget
->reg
,
341 /* create new dapm mixer control */
342 static int dapm_new_mixer(struct snd_soc_dapm_context
*dapm
,
343 struct snd_soc_dapm_widget
*w
)
347 struct snd_soc_dapm_path
*path
;
348 struct snd_card
*card
= dapm
->codec
->card
->snd_card
;
351 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
354 list_for_each_entry(path
, &w
->sources
, list_sink
) {
356 /* mixer/mux paths name must match control name */
357 if (path
->name
!= (char*)w
->kcontrols
[i
].name
)
360 /* add dapm control with long name.
361 * for dapm_mixer this is the concatenation of the
362 * mixer and kcontrol name.
363 * for dapm_mixer_named_ctl this is simply the
366 name_len
= strlen(w
->kcontrols
[i
].name
) + 1;
367 if (w
->id
!= snd_soc_dapm_mixer_named_ctl
)
368 name_len
+= 1 + strlen(w
->name
);
370 path
->long_name
= kmalloc(name_len
, GFP_KERNEL
);
372 if (path
->long_name
== NULL
)
377 snprintf(path
->long_name
, name_len
, "%s %s",
378 w
->name
, w
->kcontrols
[i
].name
);
380 case snd_soc_dapm_mixer_named_ctl
:
381 snprintf(path
->long_name
, name_len
, "%s",
382 w
->kcontrols
[i
].name
);
386 path
->long_name
[name_len
- 1] = '\0';
388 path
->kcontrol
= snd_soc_cnew(&w
->kcontrols
[i
], w
,
390 ret
= snd_ctl_add(card
, path
->kcontrol
);
393 "asoc: failed to add dapm kcontrol %s: %d\n",
394 path
->long_name
, ret
);
395 kfree(path
->long_name
);
396 path
->long_name
= NULL
;
404 /* create new dapm mux control */
405 static int dapm_new_mux(struct snd_soc_dapm_context
*dapm
,
406 struct snd_soc_dapm_widget
*w
)
408 struct snd_soc_dapm_path
*path
= NULL
;
409 struct snd_kcontrol
*kcontrol
;
410 struct snd_card
*card
= dapm
->codec
->card
->snd_card
;
413 if (!w
->num_kcontrols
) {
414 dev_err(dapm
->dev
, "asoc: mux %s has no controls\n", w
->name
);
418 kcontrol
= snd_soc_cnew(&w
->kcontrols
[0], w
, w
->name
);
419 ret
= snd_ctl_add(card
, kcontrol
);
424 list_for_each_entry(path
, &w
->sources
, list_sink
)
425 path
->kcontrol
= kcontrol
;
430 dev_err(dapm
->dev
, "asoc: failed to add kcontrol %s\n", w
->name
);
434 /* create new dapm volume control */
435 static int dapm_new_pga(struct snd_soc_dapm_context
*dapm
,
436 struct snd_soc_dapm_widget
*w
)
438 if (w
->num_kcontrols
)
439 dev_err(w
->dapm
->dev
,
440 "asoc: PGA controls not supported: '%s'\n", w
->name
);
445 /* reset 'walked' bit for each dapm path */
446 static inline void dapm_clear_walk(struct snd_soc_dapm_context
*dapm
)
448 struct snd_soc_dapm_path
*p
;
450 list_for_each_entry(p
, &dapm
->paths
, list
)
454 /* We implement power down on suspend by checking the power state of
455 * the ALSA card - when we are suspending the ALSA state for the card
458 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget
*widget
)
460 int level
= snd_power_get_state(widget
->dapm
->codec
->card
->snd_card
);
463 case SNDRV_CTL_POWER_D3hot
:
464 case SNDRV_CTL_POWER_D3cold
:
465 if (widget
->ignore_suspend
)
466 dev_dbg(widget
->dapm
->dev
, "%s ignoring suspend\n",
468 return widget
->ignore_suspend
;
475 * Recursively check for a completed path to an active or physically connected
476 * output widget. Returns number of complete paths.
478 static int is_connected_output_ep(struct snd_soc_dapm_widget
*widget
)
480 struct snd_soc_dapm_path
*path
;
483 if (widget
->id
== snd_soc_dapm_supply
)
486 switch (widget
->id
) {
487 case snd_soc_dapm_adc
:
488 case snd_soc_dapm_aif_out
:
490 return snd_soc_dapm_suspend_check(widget
);
495 if (widget
->connected
) {
496 /* connected pin ? */
497 if (widget
->id
== snd_soc_dapm_output
&& !widget
->ext
)
498 return snd_soc_dapm_suspend_check(widget
);
500 /* connected jack or spk ? */
501 if (widget
->id
== snd_soc_dapm_hp
|| widget
->id
== snd_soc_dapm_spk
||
502 (widget
->id
== snd_soc_dapm_line
&& !list_empty(&widget
->sources
)))
503 return snd_soc_dapm_suspend_check(widget
);
506 list_for_each_entry(path
, &widget
->sinks
, list_source
) {
510 if (path
->sink
&& path
->connect
) {
512 con
+= is_connected_output_ep(path
->sink
);
520 * Recursively check for a completed path to an active or physically connected
521 * input widget. Returns number of complete paths.
523 static int is_connected_input_ep(struct snd_soc_dapm_widget
*widget
)
525 struct snd_soc_dapm_path
*path
;
528 if (widget
->id
== snd_soc_dapm_supply
)
531 /* active stream ? */
532 switch (widget
->id
) {
533 case snd_soc_dapm_dac
:
534 case snd_soc_dapm_aif_in
:
536 return snd_soc_dapm_suspend_check(widget
);
541 if (widget
->connected
) {
542 /* connected pin ? */
543 if (widget
->id
== snd_soc_dapm_input
&& !widget
->ext
)
544 return snd_soc_dapm_suspend_check(widget
);
546 /* connected VMID/Bias for lower pops */
547 if (widget
->id
== snd_soc_dapm_vmid
)
548 return snd_soc_dapm_suspend_check(widget
);
550 /* connected jack ? */
551 if (widget
->id
== snd_soc_dapm_mic
||
552 (widget
->id
== snd_soc_dapm_line
&& !list_empty(&widget
->sinks
)))
553 return snd_soc_dapm_suspend_check(widget
);
556 list_for_each_entry(path
, &widget
->sources
, list_sink
) {
560 if (path
->source
&& path
->connect
) {
562 con
+= is_connected_input_ep(path
->source
);
570 * Handler for generic register modifier widget.
572 int dapm_reg_event(struct snd_soc_dapm_widget
*w
,
573 struct snd_kcontrol
*kcontrol
, int event
)
577 if (SND_SOC_DAPM_EVENT_ON(event
))
582 snd_soc_update_bits(w
->codec
, -(w
->reg
+ 1),
583 w
->mask
<< w
->shift
, val
<< w
->shift
);
587 EXPORT_SYMBOL_GPL(dapm_reg_event
);
589 /* Standard power change method, used to apply power changes to most
592 static int dapm_generic_apply_power(struct snd_soc_dapm_widget
*w
)
596 /* call any power change event handlers */
598 dev_dbg(w
->dapm
->dev
, "power %s event for %s flags %x\n",
599 w
->power
? "on" : "off",
600 w
->name
, w
->event_flags
);
602 /* power up pre event */
603 if (w
->power
&& w
->event
&&
604 (w
->event_flags
& SND_SOC_DAPM_PRE_PMU
)) {
605 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMU
);
610 /* power down pre event */
611 if (!w
->power
&& w
->event
&&
612 (w
->event_flags
& SND_SOC_DAPM_PRE_PMD
)) {
613 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMD
);
620 /* power up post event */
621 if (w
->power
&& w
->event
&&
622 (w
->event_flags
& SND_SOC_DAPM_POST_PMU
)) {
624 NULL
, SND_SOC_DAPM_POST_PMU
);
629 /* power down post event */
630 if (!w
->power
&& w
->event
&&
631 (w
->event_flags
& SND_SOC_DAPM_POST_PMD
)) {
632 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_POST_PMD
);
640 /* Generic check to see if a widget should be powered.
642 static int dapm_generic_check_power(struct snd_soc_dapm_widget
*w
)
646 in
= is_connected_input_ep(w
);
647 dapm_clear_walk(w
->dapm
);
648 out
= is_connected_output_ep(w
);
649 dapm_clear_walk(w
->dapm
);
650 return out
!= 0 && in
!= 0;
653 /* Check to see if an ADC has power */
654 static int dapm_adc_check_power(struct snd_soc_dapm_widget
*w
)
659 in
= is_connected_input_ep(w
);
660 dapm_clear_walk(w
->dapm
);
663 return dapm_generic_check_power(w
);
667 /* Check to see if a DAC has power */
668 static int dapm_dac_check_power(struct snd_soc_dapm_widget
*w
)
673 out
= is_connected_output_ep(w
);
674 dapm_clear_walk(w
->dapm
);
677 return dapm_generic_check_power(w
);
681 /* Check to see if a power supply is needed */
682 static int dapm_supply_check_power(struct snd_soc_dapm_widget
*w
)
684 struct snd_soc_dapm_path
*path
;
687 /* Check if one of our outputs is connected */
688 list_for_each_entry(path
, &w
->sinks
, list_source
) {
689 if (path
->connected
&&
690 !path
->connected(path
->source
, path
->sink
))
693 if (path
->sink
&& path
->sink
->power_check
&&
694 path
->sink
->power_check(path
->sink
)) {
700 dapm_clear_walk(w
->dapm
);
705 static int dapm_seq_compare(struct snd_soc_dapm_widget
*a
,
706 struct snd_soc_dapm_widget
*b
,
709 if (sort
[a
->id
] != sort
[b
->id
])
710 return sort
[a
->id
] - sort
[b
->id
];
711 if (a
->reg
!= b
->reg
)
712 return a
->reg
- b
->reg
;
713 if (a
->dapm
!= b
->dapm
)
714 return (unsigned long)a
->dapm
- (unsigned long)b
->dapm
;
719 /* Insert a widget in order into a DAPM power sequence. */
720 static void dapm_seq_insert(struct snd_soc_dapm_widget
*new_widget
,
721 struct list_head
*list
,
724 struct snd_soc_dapm_widget
*w
;
726 list_for_each_entry(w
, list
, power_list
)
727 if (dapm_seq_compare(new_widget
, w
, sort
) < 0) {
728 list_add_tail(&new_widget
->power_list
, &w
->power_list
);
732 list_add_tail(&new_widget
->power_list
, list
);
735 static void dapm_seq_check_event(struct snd_soc_dapm_context
*dapm
,
736 struct snd_soc_dapm_widget
*w
, int event
)
738 struct snd_soc_card
*card
= dapm
->card
;
743 case SND_SOC_DAPM_PRE_PMU
:
747 case SND_SOC_DAPM_POST_PMU
:
748 ev_name
= "POST_PMU";
751 case SND_SOC_DAPM_PRE_PMD
:
755 case SND_SOC_DAPM_POST_PMD
:
756 ev_name
= "POST_PMD";
764 if (w
->power
!= power
)
767 if (w
->event
&& (w
->event_flags
& event
)) {
768 pop_dbg(dapm
->dev
, card
->pop_time
, "pop test : %s %s\n",
770 trace_snd_soc_dapm_widget_event_start(w
, event
);
771 ret
= w
->event(w
, NULL
, event
);
772 trace_snd_soc_dapm_widget_event_done(w
, event
);
774 pr_err("%s: %s event failed: %d\n",
775 ev_name
, w
->name
, ret
);
779 /* Apply the coalesced changes from a DAPM sequence */
780 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context
*dapm
,
781 struct list_head
*pending
)
783 struct snd_soc_card
*card
= dapm
->card
;
784 struct snd_soc_dapm_widget
*w
;
786 unsigned int value
= 0;
787 unsigned int mask
= 0;
788 unsigned int cur_mask
;
790 reg
= list_first_entry(pending
, struct snd_soc_dapm_widget
,
793 list_for_each_entry(w
, pending
, power_list
) {
794 cur_mask
= 1 << w
->shift
;
795 BUG_ON(reg
!= w
->reg
);
806 pop_dbg(dapm
->dev
, card
->pop_time
,
807 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
808 w
->name
, reg
, value
, mask
);
810 /* Check for events */
811 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMU
);
812 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMD
);
816 pop_dbg(dapm
->dev
, card
->pop_time
,
817 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
818 value
, mask
, reg
, card
->pop_time
);
819 pop_wait(card
->pop_time
);
820 snd_soc_update_bits(dapm
->codec
, reg
, mask
, value
);
823 list_for_each_entry(w
, pending
, power_list
) {
824 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMU
);
825 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMD
);
829 /* Apply a DAPM power sequence.
831 * We walk over a pre-sorted list of widgets to apply power to. In
832 * order to minimise the number of writes to the device required
833 * multiple widgets will be updated in a single write where possible.
834 * Currently anything that requires more than a single write is not
837 static void dapm_seq_run(struct snd_soc_dapm_context
*dapm
,
838 struct list_head
*list
, int event
, int sort
[])
840 struct snd_soc_dapm_widget
*w
, *n
;
843 int cur_reg
= SND_SOC_NOPM
;
846 list_for_each_entry_safe(w
, n
, list
, power_list
) {
849 /* Do we need to apply any queued changes? */
850 if (sort
[w
->id
] != cur_sort
|| w
->reg
!= cur_reg
) {
851 if (!list_empty(&pending
))
852 dapm_seq_run_coalesced(dapm
, &pending
);
854 INIT_LIST_HEAD(&pending
);
856 cur_reg
= SND_SOC_NOPM
;
860 case snd_soc_dapm_pre
:
862 list_for_each_entry_safe_continue(w
, n
, list
,
865 if (event
== SND_SOC_DAPM_STREAM_START
)
867 NULL
, SND_SOC_DAPM_PRE_PMU
);
868 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
870 NULL
, SND_SOC_DAPM_PRE_PMD
);
873 case snd_soc_dapm_post
:
875 list_for_each_entry_safe_continue(w
, n
, list
,
878 if (event
== SND_SOC_DAPM_STREAM_START
)
880 NULL
, SND_SOC_DAPM_POST_PMU
);
881 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
883 NULL
, SND_SOC_DAPM_POST_PMD
);
886 case snd_soc_dapm_input
:
887 case snd_soc_dapm_output
:
888 case snd_soc_dapm_hp
:
889 case snd_soc_dapm_mic
:
890 case snd_soc_dapm_line
:
891 case snd_soc_dapm_spk
:
892 /* No register support currently */
893 ret
= dapm_generic_apply_power(w
);
897 /* Queue it up for application */
898 cur_sort
= sort
[w
->id
];
900 list_move(&w
->power_list
, &pending
);
905 dev_err(w
->dapm
->dev
,
906 "Failed to apply widget power: %d\n", ret
);
909 if (!list_empty(&pending
))
910 dapm_seq_run_coalesced(dapm
, &pending
);
914 * Scan each dapm widget for complete audio path.
915 * A complete path is a route that has valid endpoints i.e.:-
917 * o DAC to output pin.
918 * o Input Pin to ADC.
919 * o Input pin to Output pin (bypass, sidetone)
920 * o DAC to ADC (loopback).
922 static int dapm_power_widgets(struct snd_soc_dapm_context
*dapm
, int event
)
924 struct snd_soc_card
*card
= dapm
->codec
->card
;
925 struct snd_soc_dapm_widget
*w
;
927 LIST_HEAD(down_list
);
932 trace_snd_soc_dapm_start(card
);
934 /* Check which widgets we need to power and store them in
935 * lists indicating if they should be powered up or down.
937 list_for_each_entry(w
, &dapm
->widgets
, list
) {
939 case snd_soc_dapm_pre
:
940 dapm_seq_insert(w
, &down_list
, dapm_down_seq
);
942 case snd_soc_dapm_post
:
943 dapm_seq_insert(w
, &up_list
, dapm_up_seq
);
951 power
= w
->power_check(w
);
957 if (w
->power
== power
)
960 trace_snd_soc_dapm_widget_power(w
, power
);
963 dapm_seq_insert(w
, &up_list
, dapm_up_seq
);
965 dapm_seq_insert(w
, &down_list
, dapm_down_seq
);
972 /* If there are no DAPM widgets then try to figure out power from the
975 if (list_empty(&dapm
->widgets
)) {
977 case SND_SOC_DAPM_STREAM_START
:
978 case SND_SOC_DAPM_STREAM_RESUME
:
981 case SND_SOC_DAPM_STREAM_SUSPEND
:
984 case SND_SOC_DAPM_STREAM_NOP
:
985 switch (dapm
->bias_level
) {
986 case SND_SOC_BIAS_STANDBY
:
987 case SND_SOC_BIAS_OFF
:
1000 if (sys_power
&& dapm
->bias_level
== SND_SOC_BIAS_OFF
) {
1001 ret
= snd_soc_dapm_set_bias_level(card
, dapm
,
1002 SND_SOC_BIAS_STANDBY
);
1005 "Failed to turn on bias: %d\n", ret
);
1008 /* If we're changing to all on or all off then prepare */
1009 if ((sys_power
&& dapm
->bias_level
== SND_SOC_BIAS_STANDBY
) ||
1010 (!sys_power
&& dapm
->bias_level
== SND_SOC_BIAS_ON
)) {
1011 ret
= snd_soc_dapm_set_bias_level(card
, dapm
, SND_SOC_BIAS_PREPARE
);
1014 "Failed to prepare bias: %d\n", ret
);
1017 /* Power down widgets first; try to avoid amplifying pops. */
1018 dapm_seq_run(dapm
, &down_list
, event
, dapm_down_seq
);
1021 dapm_seq_run(dapm
, &up_list
, event
, dapm_up_seq
);
1023 /* If we just powered the last thing off drop to standby bias */
1024 if (dapm
->bias_level
== SND_SOC_BIAS_PREPARE
&& !sys_power
) {
1025 ret
= snd_soc_dapm_set_bias_level(card
, dapm
, SND_SOC_BIAS_STANDBY
);
1028 "Failed to apply standby bias: %d\n", ret
);
1031 /* If we're in standby and can support bias off then do that */
1032 if (dapm
->bias_level
== SND_SOC_BIAS_STANDBY
&&
1033 dapm
->idle_bias_off
) {
1034 ret
= snd_soc_dapm_set_bias_level(card
, dapm
, SND_SOC_BIAS_OFF
);
1037 "Failed to turn off bias: %d\n", ret
);
1040 /* If we just powered up then move to active bias */
1041 if (dapm
->bias_level
== SND_SOC_BIAS_PREPARE
&& sys_power
) {
1042 ret
= snd_soc_dapm_set_bias_level(card
, dapm
, SND_SOC_BIAS_ON
);
1045 "Failed to apply active bias: %d\n", ret
);
1048 pop_dbg(dapm
->dev
, card
->pop_time
,
1049 "DAPM sequencing finished, waiting %dms\n", card
->pop_time
);
1050 pop_wait(card
->pop_time
);
1052 trace_snd_soc_dapm_done(card
);
1057 #ifdef CONFIG_DEBUG_FS
1058 static int dapm_widget_power_open_file(struct inode
*inode
, struct file
*file
)
1060 file
->private_data
= inode
->i_private
;
1064 static ssize_t
dapm_widget_power_read_file(struct file
*file
,
1065 char __user
*user_buf
,
1066 size_t count
, loff_t
*ppos
)
1068 struct snd_soc_dapm_widget
*w
= file
->private_data
;
1072 struct snd_soc_dapm_path
*p
= NULL
;
1074 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
1078 in
= is_connected_input_ep(w
);
1079 dapm_clear_walk(w
->dapm
);
1080 out
= is_connected_output_ep(w
);
1081 dapm_clear_walk(w
->dapm
);
1083 ret
= snprintf(buf
, PAGE_SIZE
, "%s: %s in %d out %d",
1084 w
->name
, w
->power
? "On" : "Off", in
, out
);
1087 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1088 " - R%d(0x%x) bit %d",
1089 w
->reg
, w
->reg
, w
->shift
);
1091 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, "\n");
1094 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, " stream %s %s\n",
1096 w
->active
? "active" : "inactive");
1098 list_for_each_entry(p
, &w
->sources
, list_sink
) {
1099 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1103 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1105 p
->name
? p
->name
: "static",
1108 list_for_each_entry(p
, &w
->sinks
, list_source
) {
1109 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1113 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1115 p
->name
? p
->name
: "static",
1119 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, ret
);
1125 static const struct file_operations dapm_widget_power_fops
= {
1126 .open
= dapm_widget_power_open_file
,
1127 .read
= dapm_widget_power_read_file
,
1128 .llseek
= default_llseek
,
1131 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
)
1133 struct snd_soc_dapm_widget
*w
;
1136 if (!dapm
->debugfs_dapm
)
1139 list_for_each_entry(w
, &dapm
->widgets
, list
) {
1143 d
= debugfs_create_file(w
->name
, 0444,
1144 dapm
->debugfs_dapm
, w
,
1145 &dapm_widget_power_fops
);
1147 dev_warn(w
->dapm
->dev
,
1148 "ASoC: Failed to create %s debugfs file\n",
1153 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
)
1158 /* test and update the power status of a mux widget */
1159 static int dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
1160 struct snd_kcontrol
*kcontrol
, int change
,
1161 int mux
, struct soc_enum
*e
)
1163 struct snd_soc_dapm_path
*path
;
1166 if (widget
->id
!= snd_soc_dapm_mux
&&
1167 widget
->id
!= snd_soc_dapm_value_mux
)
1173 /* find dapm widget path assoc with kcontrol */
1174 list_for_each_entry(path
, &widget
->dapm
->paths
, list
) {
1175 if (path
->kcontrol
!= kcontrol
)
1178 if (!path
->name
|| !e
->texts
[mux
])
1182 /* we now need to match the string in the enum to the path */
1183 if (!(strcmp(path
->name
, e
->texts
[mux
])))
1184 path
->connect
= 1; /* new connection */
1186 path
->connect
= 0; /* old connection must be powered down */
1190 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1195 /* test and update the power status of a mixer or switch widget */
1196 static int dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
1197 struct snd_kcontrol
*kcontrol
, int connect
)
1199 struct snd_soc_dapm_path
*path
;
1202 if (widget
->id
!= snd_soc_dapm_mixer
&&
1203 widget
->id
!= snd_soc_dapm_mixer_named_ctl
&&
1204 widget
->id
!= snd_soc_dapm_switch
)
1207 /* find dapm widget path assoc with kcontrol */
1208 list_for_each_entry(path
, &widget
->dapm
->paths
, list
) {
1209 if (path
->kcontrol
!= kcontrol
)
1212 /* found, now check type */
1214 path
->connect
= connect
;
1219 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1224 /* show dapm widget status in sys fs */
1225 static ssize_t
dapm_widget_show(struct device
*dev
,
1226 struct device_attribute
*attr
, char *buf
)
1228 struct snd_soc_pcm_runtime
*rtd
=
1229 container_of(dev
, struct snd_soc_pcm_runtime
, dev
);
1230 struct snd_soc_codec
*codec
=rtd
->codec
;
1231 struct snd_soc_dapm_widget
*w
;
1233 char *state
= "not set";
1235 list_for_each_entry(w
, &codec
->dapm
.widgets
, list
) {
1237 /* only display widgets that burnm power */
1239 case snd_soc_dapm_hp
:
1240 case snd_soc_dapm_mic
:
1241 case snd_soc_dapm_spk
:
1242 case snd_soc_dapm_line
:
1243 case snd_soc_dapm_micbias
:
1244 case snd_soc_dapm_dac
:
1245 case snd_soc_dapm_adc
:
1246 case snd_soc_dapm_pga
:
1247 case snd_soc_dapm_mixer
:
1248 case snd_soc_dapm_mixer_named_ctl
:
1249 case snd_soc_dapm_supply
:
1251 count
+= sprintf(buf
+ count
, "%s: %s\n",
1252 w
->name
, w
->power
? "On":"Off");
1259 switch (codec
->dapm
.bias_level
) {
1260 case SND_SOC_BIAS_ON
:
1263 case SND_SOC_BIAS_PREPARE
:
1266 case SND_SOC_BIAS_STANDBY
:
1269 case SND_SOC_BIAS_OFF
:
1273 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
1278 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
1280 int snd_soc_dapm_sys_add(struct device
*dev
)
1282 return device_create_file(dev
, &dev_attr_dapm_widget
);
1285 static void snd_soc_dapm_sys_remove(struct device
*dev
)
1287 device_remove_file(dev
, &dev_attr_dapm_widget
);
1290 /* free all dapm widgets and resources */
1291 static void dapm_free_widgets(struct snd_soc_dapm_context
*dapm
)
1293 struct snd_soc_dapm_widget
*w
, *next_w
;
1294 struct snd_soc_dapm_path
*p
, *next_p
;
1296 list_for_each_entry_safe(w
, next_w
, &dapm
->widgets
, list
) {
1302 list_for_each_entry_safe(p
, next_p
, &dapm
->paths
, list
) {
1304 kfree(p
->long_name
);
1309 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context
*dapm
,
1310 const char *pin
, int status
)
1312 struct snd_soc_dapm_widget
*w
;
1314 list_for_each_entry(w
, &dapm
->widgets
, list
) {
1315 if (!strcmp(w
->name
, pin
)) {
1316 dev_dbg(w
->dapm
->dev
, "dapm: pin %s = %d\n",
1318 w
->connected
= status
;
1319 /* Allow disabling of forced pins */
1326 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
1331 * snd_soc_dapm_sync - scan and power dapm paths
1332 * @dapm: DAPM context
1334 * Walks all dapm audio paths and powers widgets according to their
1335 * stream or path usage.
1337 * Returns 0 for success.
1339 int snd_soc_dapm_sync(struct snd_soc_dapm_context
*dapm
)
1341 return dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
1343 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
1345 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context
*dapm
,
1346 const struct snd_soc_dapm_route
*route
)
1348 struct snd_soc_dapm_path
*path
;
1349 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
1351 const char *control
= route
->control
;
1353 char prefixed_sink
[80];
1354 char prefixed_source
[80];
1357 if (dapm
->codec
->name_prefix
) {
1358 snprintf(prefixed_sink
, sizeof(prefixed_sink
), "%s %s",
1359 dapm
->codec
->name_prefix
, route
->sink
);
1360 sink
= prefixed_sink
;
1361 snprintf(prefixed_source
, sizeof(prefixed_source
), "%s %s",
1362 dapm
->codec
->name_prefix
, route
->source
);
1363 source
= prefixed_source
;
1366 source
= route
->source
;
1369 /* find src and dest widgets */
1370 list_for_each_entry(w
, &dapm
->widgets
, list
) {
1372 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
1376 if (!wsource
&& !(strcmp(w
->name
, source
))) {
1381 if (wsource
== NULL
|| wsink
== NULL
)
1384 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
1388 path
->source
= wsource
;
1390 path
->connected
= route
->connected
;
1391 INIT_LIST_HEAD(&path
->list
);
1392 INIT_LIST_HEAD(&path
->list_source
);
1393 INIT_LIST_HEAD(&path
->list_sink
);
1395 /* check for external widgets */
1396 if (wsink
->id
== snd_soc_dapm_input
) {
1397 if (wsource
->id
== snd_soc_dapm_micbias
||
1398 wsource
->id
== snd_soc_dapm_mic
||
1399 wsource
->id
== snd_soc_dapm_line
||
1400 wsource
->id
== snd_soc_dapm_output
)
1403 if (wsource
->id
== snd_soc_dapm_output
) {
1404 if (wsink
->id
== snd_soc_dapm_spk
||
1405 wsink
->id
== snd_soc_dapm_hp
||
1406 wsink
->id
== snd_soc_dapm_line
||
1407 wsink
->id
== snd_soc_dapm_input
)
1411 /* connect static paths */
1412 if (control
== NULL
) {
1413 list_add(&path
->list
, &dapm
->paths
);
1414 list_add(&path
->list_sink
, &wsink
->sources
);
1415 list_add(&path
->list_source
, &wsource
->sinks
);
1420 /* connect dynamic paths */
1422 case snd_soc_dapm_adc
:
1423 case snd_soc_dapm_dac
:
1424 case snd_soc_dapm_pga
:
1425 case snd_soc_dapm_input
:
1426 case snd_soc_dapm_output
:
1427 case snd_soc_dapm_micbias
:
1428 case snd_soc_dapm_vmid
:
1429 case snd_soc_dapm_pre
:
1430 case snd_soc_dapm_post
:
1431 case snd_soc_dapm_supply
:
1432 case snd_soc_dapm_aif_in
:
1433 case snd_soc_dapm_aif_out
:
1434 list_add(&path
->list
, &dapm
->paths
);
1435 list_add(&path
->list_sink
, &wsink
->sources
);
1436 list_add(&path
->list_source
, &wsource
->sinks
);
1439 case snd_soc_dapm_mux
:
1440 case snd_soc_dapm_value_mux
:
1441 ret
= dapm_connect_mux(dapm
, wsource
, wsink
, path
, control
,
1442 &wsink
->kcontrols
[0]);
1446 case snd_soc_dapm_switch
:
1447 case snd_soc_dapm_mixer
:
1448 case snd_soc_dapm_mixer_named_ctl
:
1449 ret
= dapm_connect_mixer(dapm
, wsource
, wsink
, path
, control
);
1453 case snd_soc_dapm_hp
:
1454 case snd_soc_dapm_mic
:
1455 case snd_soc_dapm_line
:
1456 case snd_soc_dapm_spk
:
1457 list_add(&path
->list
, &dapm
->paths
);
1458 list_add(&path
->list_sink
, &wsink
->sources
);
1459 list_add(&path
->list_source
, &wsource
->sinks
);
1466 dev_warn(dapm
->dev
, "asoc: no dapm match for %s --> %s --> %s\n",
1467 source
, control
, sink
);
1473 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1474 * @dapm: DAPM context
1475 * @route: audio routes
1476 * @num: number of routes
1478 * Connects 2 dapm widgets together via a named audio path. The sink is
1479 * the widget receiving the audio signal, whilst the source is the sender
1480 * of the audio signal.
1482 * Returns 0 for success else error. On error all resources can be freed
1483 * with a call to snd_soc_card_free().
1485 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context
*dapm
,
1486 const struct snd_soc_dapm_route
*route
, int num
)
1490 for (i
= 0; i
< num
; i
++) {
1491 ret
= snd_soc_dapm_add_route(dapm
, route
);
1493 dev_err(dapm
->dev
, "Failed to add route %s->%s\n",
1494 route
->source
, route
->sink
);
1502 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
1505 * snd_soc_dapm_new_widgets - add new dapm widgets
1506 * @dapm: DAPM context
1508 * Checks the codec for any new dapm widgets and creates them if found.
1510 * Returns 0 for success.
1512 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context
*dapm
)
1514 struct snd_soc_dapm_widget
*w
;
1516 list_for_each_entry(w
, &dapm
->widgets
, list
)
1522 case snd_soc_dapm_switch
:
1523 case snd_soc_dapm_mixer
:
1524 case snd_soc_dapm_mixer_named_ctl
:
1525 w
->power_check
= dapm_generic_check_power
;
1526 dapm_new_mixer(dapm
, w
);
1528 case snd_soc_dapm_mux
:
1529 case snd_soc_dapm_value_mux
:
1530 w
->power_check
= dapm_generic_check_power
;
1531 dapm_new_mux(dapm
, w
);
1533 case snd_soc_dapm_adc
:
1534 case snd_soc_dapm_aif_out
:
1535 w
->power_check
= dapm_adc_check_power
;
1537 case snd_soc_dapm_dac
:
1538 case snd_soc_dapm_aif_in
:
1539 w
->power_check
= dapm_dac_check_power
;
1541 case snd_soc_dapm_pga
:
1542 w
->power_check
= dapm_generic_check_power
;
1543 dapm_new_pga(dapm
, w
);
1545 case snd_soc_dapm_input
:
1546 case snd_soc_dapm_output
:
1547 case snd_soc_dapm_micbias
:
1548 case snd_soc_dapm_spk
:
1549 case snd_soc_dapm_hp
:
1550 case snd_soc_dapm_mic
:
1551 case snd_soc_dapm_line
:
1552 w
->power_check
= dapm_generic_check_power
;
1554 case snd_soc_dapm_supply
:
1555 w
->power_check
= dapm_supply_check_power
;
1556 case snd_soc_dapm_vmid
:
1557 case snd_soc_dapm_pre
:
1558 case snd_soc_dapm_post
:
1564 dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
1567 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
1570 * snd_soc_dapm_get_volsw - dapm mixer get callback
1571 * @kcontrol: mixer control
1572 * @ucontrol: control element information
1574 * Callback to get the value of a dapm mixer control.
1576 * Returns 0 for success.
1578 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
1579 struct snd_ctl_elem_value
*ucontrol
)
1581 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1582 struct soc_mixer_control
*mc
=
1583 (struct soc_mixer_control
*)kcontrol
->private_value
;
1584 unsigned int reg
= mc
->reg
;
1585 unsigned int shift
= mc
->shift
;
1586 unsigned int rshift
= mc
->rshift
;
1588 unsigned int invert
= mc
->invert
;
1589 unsigned int mask
= (1 << fls(max
)) - 1;
1591 ucontrol
->value
.integer
.value
[0] =
1592 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
1593 if (shift
!= rshift
)
1594 ucontrol
->value
.integer
.value
[1] =
1595 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
1597 ucontrol
->value
.integer
.value
[0] =
1598 max
- ucontrol
->value
.integer
.value
[0];
1599 if (shift
!= rshift
)
1600 ucontrol
->value
.integer
.value
[1] =
1601 max
- ucontrol
->value
.integer
.value
[1];
1606 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
1609 * snd_soc_dapm_put_volsw - dapm mixer set callback
1610 * @kcontrol: mixer control
1611 * @ucontrol: control element information
1613 * Callback to set the value of a dapm mixer control.
1615 * Returns 0 for success.
1617 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
1618 struct snd_ctl_elem_value
*ucontrol
)
1620 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1621 struct soc_mixer_control
*mc
=
1622 (struct soc_mixer_control
*)kcontrol
->private_value
;
1623 unsigned int reg
= mc
->reg
;
1624 unsigned int shift
= mc
->shift
;
1625 unsigned int rshift
= mc
->rshift
;
1627 unsigned int mask
= (1 << fls(max
)) - 1;
1628 unsigned int invert
= mc
->invert
;
1629 unsigned int val
, val2
, val_mask
;
1633 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1637 val_mask
= mask
<< shift
;
1639 if (shift
!= rshift
) {
1640 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1643 val_mask
|= mask
<< rshift
;
1644 val
|= val2
<< rshift
;
1647 mutex_lock(&widget
->codec
->mutex
);
1648 widget
->value
= val
;
1650 if (snd_soc_test_bits(widget
->codec
, reg
, val_mask
, val
)) {
1652 /* new connection */
1653 connect
= invert
? 0:1;
1655 /* old connection must be powered down */
1656 connect
= invert
? 1:0;
1658 dapm_mixer_update_power(widget
, kcontrol
, connect
);
1661 if (widget
->event
) {
1662 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1663 ret
= widget
->event(widget
, kcontrol
,
1664 SND_SOC_DAPM_PRE_REG
);
1670 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1671 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1672 ret
= widget
->event(widget
, kcontrol
,
1673 SND_SOC_DAPM_POST_REG
);
1675 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1678 mutex_unlock(&widget
->codec
->mutex
);
1681 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
1684 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1685 * @kcontrol: mixer control
1686 * @ucontrol: control element information
1688 * Callback to get the value of a dapm enumerated double mixer control.
1690 * Returns 0 for success.
1692 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
1693 struct snd_ctl_elem_value
*ucontrol
)
1695 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1696 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1697 unsigned int val
, bitmask
;
1699 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1701 val
= snd_soc_read(widget
->codec
, e
->reg
);
1702 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
1703 if (e
->shift_l
!= e
->shift_r
)
1704 ucontrol
->value
.enumerated
.item
[1] =
1705 (val
>> e
->shift_r
) & (bitmask
- 1);
1709 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
1712 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1713 * @kcontrol: mixer control
1714 * @ucontrol: control element information
1716 * Callback to set the value of a dapm enumerated double mixer control.
1718 * Returns 0 for success.
1720 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
1721 struct snd_ctl_elem_value
*ucontrol
)
1723 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1724 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1725 unsigned int val
, mux
, change
;
1726 unsigned int mask
, bitmask
;
1729 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1731 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1733 mux
= ucontrol
->value
.enumerated
.item
[0];
1734 val
= mux
<< e
->shift_l
;
1735 mask
= (bitmask
- 1) << e
->shift_l
;
1736 if (e
->shift_l
!= e
->shift_r
) {
1737 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1739 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1740 mask
|= (bitmask
- 1) << e
->shift_r
;
1743 mutex_lock(&widget
->codec
->mutex
);
1744 widget
->value
= val
;
1745 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
1746 dapm_mux_update_power(widget
, kcontrol
, change
, mux
, e
);
1748 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1749 ret
= widget
->event(widget
,
1750 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1755 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1757 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1758 ret
= widget
->event(widget
,
1759 kcontrol
, SND_SOC_DAPM_POST_REG
);
1762 mutex_unlock(&widget
->codec
->mutex
);
1765 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
1768 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1769 * @kcontrol: mixer control
1770 * @ucontrol: control element information
1772 * Returns 0 for success.
1774 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol
*kcontrol
,
1775 struct snd_ctl_elem_value
*ucontrol
)
1777 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1779 ucontrol
->value
.enumerated
.item
[0] = widget
->value
;
1783 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt
);
1786 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1787 * @kcontrol: mixer control
1788 * @ucontrol: control element information
1790 * Returns 0 for success.
1792 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol
*kcontrol
,
1793 struct snd_ctl_elem_value
*ucontrol
)
1795 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1796 struct soc_enum
*e
=
1797 (struct soc_enum
*)kcontrol
->private_value
;
1801 if (ucontrol
->value
.enumerated
.item
[0] >= e
->max
)
1804 mutex_lock(&widget
->codec
->mutex
);
1806 change
= widget
->value
!= ucontrol
->value
.enumerated
.item
[0];
1807 widget
->value
= ucontrol
->value
.enumerated
.item
[0];
1808 dapm_mux_update_power(widget
, kcontrol
, change
, widget
->value
, e
);
1810 mutex_unlock(&widget
->codec
->mutex
);
1813 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt
);
1816 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1818 * @kcontrol: mixer control
1819 * @ucontrol: control element information
1821 * Callback to get the value of a dapm semi enumerated double mixer control.
1823 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1824 * used for handling bitfield coded enumeration for example.
1826 * Returns 0 for success.
1828 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
1829 struct snd_ctl_elem_value
*ucontrol
)
1831 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1832 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1833 unsigned int reg_val
, val
, mux
;
1835 reg_val
= snd_soc_read(widget
->codec
, e
->reg
);
1836 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
1837 for (mux
= 0; mux
< e
->max
; mux
++) {
1838 if (val
== e
->values
[mux
])
1841 ucontrol
->value
.enumerated
.item
[0] = mux
;
1842 if (e
->shift_l
!= e
->shift_r
) {
1843 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
1844 for (mux
= 0; mux
< e
->max
; mux
++) {
1845 if (val
== e
->values
[mux
])
1848 ucontrol
->value
.enumerated
.item
[1] = mux
;
1853 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double
);
1856 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1858 * @kcontrol: mixer control
1859 * @ucontrol: control element information
1861 * Callback to set the value of a dapm semi enumerated double mixer control.
1863 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1864 * used for handling bitfield coded enumeration for example.
1866 * Returns 0 for success.
1868 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
1869 struct snd_ctl_elem_value
*ucontrol
)
1871 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1872 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1873 unsigned int val
, mux
, change
;
1877 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1879 mux
= ucontrol
->value
.enumerated
.item
[0];
1880 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
1881 mask
= e
->mask
<< e
->shift_l
;
1882 if (e
->shift_l
!= e
->shift_r
) {
1883 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1885 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
1886 mask
|= e
->mask
<< e
->shift_r
;
1889 mutex_lock(&widget
->codec
->mutex
);
1890 widget
->value
= val
;
1891 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
1892 dapm_mux_update_power(widget
, kcontrol
, change
, mux
, e
);
1894 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1895 ret
= widget
->event(widget
,
1896 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1901 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1903 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1904 ret
= widget
->event(widget
,
1905 kcontrol
, SND_SOC_DAPM_POST_REG
);
1908 mutex_unlock(&widget
->codec
->mutex
);
1911 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double
);
1914 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1916 * @kcontrol: mixer control
1917 * @uinfo: control element information
1919 * Callback to provide information about a pin switch control.
1921 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol
*kcontrol
,
1922 struct snd_ctl_elem_info
*uinfo
)
1924 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1926 uinfo
->value
.integer
.min
= 0;
1927 uinfo
->value
.integer
.max
= 1;
1931 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch
);
1934 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1936 * @kcontrol: mixer control
1939 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol
*kcontrol
,
1940 struct snd_ctl_elem_value
*ucontrol
)
1942 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1943 const char *pin
= (const char *)kcontrol
->private_value
;
1945 mutex_lock(&codec
->mutex
);
1947 ucontrol
->value
.integer
.value
[0] =
1948 snd_soc_dapm_get_pin_status(&codec
->dapm
, pin
);
1950 mutex_unlock(&codec
->mutex
);
1954 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch
);
1957 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1959 * @kcontrol: mixer control
1962 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol
*kcontrol
,
1963 struct snd_ctl_elem_value
*ucontrol
)
1965 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1966 const char *pin
= (const char *)kcontrol
->private_value
;
1968 mutex_lock(&codec
->mutex
);
1970 if (ucontrol
->value
.integer
.value
[0])
1971 snd_soc_dapm_enable_pin(&codec
->dapm
, pin
);
1973 snd_soc_dapm_disable_pin(&codec
->dapm
, pin
);
1975 snd_soc_dapm_sync(&codec
->dapm
);
1977 mutex_unlock(&codec
->mutex
);
1981 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch
);
1984 * snd_soc_dapm_new_control - create new dapm control
1985 * @dapm: DAPM context
1986 * @widget: widget template
1988 * Creates a new dapm control based upon the template.
1990 * Returns 0 for success else error.
1992 int snd_soc_dapm_new_control(struct snd_soc_dapm_context
*dapm
,
1993 const struct snd_soc_dapm_widget
*widget
)
1995 struct snd_soc_dapm_widget
*w
;
1998 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
2001 name_len
= strlen(widget
->name
) + 1;
2002 if (dapm
->codec
->name_prefix
)
2003 name_len
+= 1 + strlen(dapm
->codec
->name_prefix
);
2004 w
->name
= kmalloc(name_len
, GFP_KERNEL
);
2005 if (w
->name
== NULL
) {
2009 if (dapm
->codec
->name_prefix
)
2010 snprintf(w
->name
, name_len
, "%s %s",
2011 dapm
->codec
->name_prefix
, widget
->name
);
2013 snprintf(w
->name
, name_len
, "%s", widget
->name
);
2016 w
->codec
= dapm
->codec
;
2017 INIT_LIST_HEAD(&w
->sources
);
2018 INIT_LIST_HEAD(&w
->sinks
);
2019 INIT_LIST_HEAD(&w
->list
);
2020 list_add(&w
->list
, &dapm
->widgets
);
2022 /* machine layer set ups unconnected pins and insertions */
2026 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
2029 * snd_soc_dapm_new_controls - create new dapm controls
2030 * @dapm: DAPM context
2031 * @widget: widget array
2032 * @num: number of widgets
2034 * Creates new DAPM controls based upon the templates.
2036 * Returns 0 for success else error.
2038 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context
*dapm
,
2039 const struct snd_soc_dapm_widget
*widget
,
2044 for (i
= 0; i
< num
; i
++) {
2045 ret
= snd_soc_dapm_new_control(dapm
, widget
);
2048 "ASoC: Failed to create DAPM control %s: %d\n",
2056 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
2058 static void soc_dapm_stream_event(struct snd_soc_dapm_context
*dapm
,
2059 const char *stream
, int event
)
2061 struct snd_soc_dapm_widget
*w
;
2063 list_for_each_entry(w
, &dapm
->widgets
, list
)
2067 dev_dbg(w
->dapm
->dev
, "widget %s\n %s stream %s event %d\n",
2068 w
->name
, w
->sname
, stream
, event
);
2069 if (strstr(w
->sname
, stream
)) {
2071 case SND_SOC_DAPM_STREAM_START
:
2074 case SND_SOC_DAPM_STREAM_STOP
:
2077 case SND_SOC_DAPM_STREAM_SUSPEND
:
2078 case SND_SOC_DAPM_STREAM_RESUME
:
2079 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
2080 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
2086 dapm_power_widgets(dapm
, event
);
2090 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2091 * @rtd: PCM runtime data
2092 * @stream: stream name
2093 * @event: stream event
2095 * Sends a stream event to the dapm core. The core then makes any
2096 * necessary widget power changes.
2098 * Returns 0 for success else error.
2100 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime
*rtd
,
2101 const char *stream
, int event
)
2103 struct snd_soc_codec
*codec
= rtd
->codec
;
2108 mutex_lock(&codec
->mutex
);
2109 soc_dapm_stream_event(&codec
->dapm
, stream
, event
);
2110 mutex_unlock(&codec
->mutex
);
2113 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event
);
2116 * snd_soc_dapm_enable_pin - enable pin.
2117 * @dapm: DAPM context
2120 * Enables input/output pin and its parents or children widgets iff there is
2121 * a valid audio route and active audio stream.
2122 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2123 * do any widget power switching.
2125 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
2127 return snd_soc_dapm_set_pin(dapm
, pin
, 1);
2129 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
2132 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2133 * @dapm: DAPM context
2136 * Enables input/output pin regardless of any other state. This is
2137 * intended for use with microphone bias supplies used in microphone
2140 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2141 * do any widget power switching.
2143 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context
*dapm
,
2146 struct snd_soc_dapm_widget
*w
;
2148 list_for_each_entry(w
, &dapm
->widgets
, list
) {
2149 if (!strcmp(w
->name
, pin
)) {
2150 dev_dbg(w
->dapm
->dev
,
2151 "dapm: force enable pin %s\n", pin
);
2158 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
2161 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin
);
2164 * snd_soc_dapm_disable_pin - disable pin.
2165 * @dapm: DAPM context
2168 * Disables input/output pin and its parents or children widgets.
2169 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2170 * do any widget power switching.
2172 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context
*dapm
,
2175 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
2177 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
2180 * snd_soc_dapm_nc_pin - permanently disable pin.
2181 * @dapm: DAPM context
2184 * Marks the specified pin as being not connected, disabling it along
2185 * any parent or child widgets. At present this is identical to
2186 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2187 * additional things such as disabling controls which only affect
2188 * paths through the pin.
2190 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2191 * do any widget power switching.
2193 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
2195 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
2197 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin
);
2200 * snd_soc_dapm_get_pin_status - get audio pin status
2201 * @dapm: DAPM context
2202 * @pin: audio signal pin endpoint (or start point)
2204 * Get audio pin status - connected or disconnected.
2206 * Returns 1 for connected otherwise 0.
2208 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context
*dapm
,
2211 struct snd_soc_dapm_widget
*w
;
2213 list_for_each_entry(w
, &dapm
->widgets
, list
) {
2214 if (!strcmp(w
->name
, pin
))
2215 return w
->connected
;
2220 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
2223 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2224 * @dapm: DAPM context
2225 * @pin: audio signal pin endpoint (or start point)
2227 * Mark the given endpoint or pin as ignoring suspend. When the
2228 * system is disabled a path between two endpoints flagged as ignoring
2229 * suspend will not be disabled. The path must already be enabled via
2230 * normal means at suspend time, it will not be turned on if it was not
2233 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context
*dapm
,
2236 struct snd_soc_dapm_widget
*w
;
2238 list_for_each_entry(w
, &dapm
->widgets
, list
) {
2239 if (!strcmp(w
->name
, pin
)) {
2240 w
->ignore_suspend
= 1;
2245 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
2248 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend
);
2251 * snd_soc_dapm_free - free dapm resources
2254 * Free all dapm widgets and resources.
2256 void snd_soc_dapm_free(struct snd_soc_dapm_context
*dapm
)
2258 snd_soc_dapm_sys_remove(dapm
->dev
);
2259 dapm_free_widgets(dapm
);
2261 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
2263 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context
*dapm
)
2265 struct snd_soc_dapm_widget
*w
;
2266 LIST_HEAD(down_list
);
2269 list_for_each_entry(w
, &dapm
->widgets
, list
) {
2271 dapm_seq_insert(w
, &down_list
, dapm_down_seq
);
2277 /* If there were no widgets to power down we're already in
2281 snd_soc_dapm_set_bias_level(NULL
, dapm
, SND_SOC_BIAS_PREPARE
);
2282 dapm_seq_run(dapm
, &down_list
, 0, dapm_down_seq
);
2283 snd_soc_dapm_set_bias_level(NULL
, dapm
, SND_SOC_BIAS_STANDBY
);
2288 * snd_soc_dapm_shutdown - callback for system shutdown
2290 void snd_soc_dapm_shutdown(struct snd_soc_card
*card
)
2292 struct snd_soc_codec
*codec
;
2294 list_for_each_entry(codec
, &card
->codec_dev_list
, list
) {
2295 soc_dapm_shutdown_codec(&codec
->dapm
);
2296 snd_soc_dapm_set_bias_level(card
, &codec
->dapm
, SND_SOC_BIAS_OFF
);
2300 /* Module information */
2301 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2302 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2303 MODULE_LICENSE("GPL");