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/initval.h>
48 #include <trace/events/asoc.h>
50 /* dapm power sequences - make this per codec in the future */
51 static int dapm_up_seq
[] = {
52 [snd_soc_dapm_pre
] = 0,
53 [snd_soc_dapm_supply
] = 1,
54 [snd_soc_dapm_micbias
] = 2,
55 [snd_soc_dapm_aif_in
] = 3,
56 [snd_soc_dapm_aif_out
] = 3,
57 [snd_soc_dapm_mic
] = 4,
58 [snd_soc_dapm_mux
] = 5,
59 [snd_soc_dapm_value_mux
] = 5,
60 [snd_soc_dapm_dac
] = 6,
61 [snd_soc_dapm_mixer
] = 7,
62 [snd_soc_dapm_mixer_named_ctl
] = 7,
63 [snd_soc_dapm_pga
] = 8,
64 [snd_soc_dapm_adc
] = 9,
65 [snd_soc_dapm_hp
] = 10,
66 [snd_soc_dapm_spk
] = 10,
67 [snd_soc_dapm_post
] = 11,
70 static int dapm_down_seq
[] = {
71 [snd_soc_dapm_pre
] = 0,
72 [snd_soc_dapm_adc
] = 1,
73 [snd_soc_dapm_hp
] = 2,
74 [snd_soc_dapm_spk
] = 2,
75 [snd_soc_dapm_pga
] = 4,
76 [snd_soc_dapm_mixer_named_ctl
] = 5,
77 [snd_soc_dapm_mixer
] = 5,
78 [snd_soc_dapm_dac
] = 6,
79 [snd_soc_dapm_mic
] = 7,
80 [snd_soc_dapm_micbias
] = 8,
81 [snd_soc_dapm_mux
] = 9,
82 [snd_soc_dapm_value_mux
] = 9,
83 [snd_soc_dapm_aif_in
] = 10,
84 [snd_soc_dapm_aif_out
] = 10,
85 [snd_soc_dapm_supply
] = 11,
86 [snd_soc_dapm_post
] = 12,
89 static void pop_wait(u32 pop_time
)
92 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time
));
95 static void pop_dbg(struct device
*dev
, u32 pop_time
, const char *fmt
, ...)
103 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
108 vsnprintf(buf
, PAGE_SIZE
, fmt
, args
);
115 /* create a new dapm widget */
116 static inline struct snd_soc_dapm_widget
*dapm_cnew_widget(
117 const struct snd_soc_dapm_widget
*_widget
)
119 return kmemdup(_widget
, sizeof(*_widget
), GFP_KERNEL
);
123 * snd_soc_dapm_set_bias_level - set the bias level for the system
124 * @card: audio device
125 * @level: level to configure
127 * Configure the bias (power) levels for the SoC audio device.
129 * Returns 0 for success else error.
131 static int snd_soc_dapm_set_bias_level(struct snd_soc_card
*card
,
132 struct snd_soc_dapm_context
*dapm
,
133 enum snd_soc_bias_level level
)
138 case SND_SOC_BIAS_ON
:
139 dev_dbg(dapm
->dev
, "Setting full bias\n");
141 case SND_SOC_BIAS_PREPARE
:
142 dev_dbg(dapm
->dev
, "Setting bias prepare\n");
144 case SND_SOC_BIAS_STANDBY
:
145 dev_dbg(dapm
->dev
, "Setting standby bias\n");
147 case SND_SOC_BIAS_OFF
:
148 dev_dbg(dapm
->dev
, "Setting bias off\n");
151 dev_err(dapm
->dev
, "Setting invalid bias %d\n", level
);
155 trace_snd_soc_bias_level_start(card
, level
);
157 if (card
&& card
->set_bias_level
)
158 ret
= card
->set_bias_level(card
, level
);
160 if (dapm
->codec
&& dapm
->codec
->driver
->set_bias_level
)
161 ret
= dapm
->codec
->driver
->set_bias_level(dapm
->codec
, level
);
163 dapm
->bias_level
= level
;
166 if (card
&& card
->set_bias_level_post
)
167 ret
= card
->set_bias_level_post(card
, level
);
170 trace_snd_soc_bias_level_done(card
, level
);
175 /* set up initial codec paths */
176 static void dapm_set_path_status(struct snd_soc_dapm_widget
*w
,
177 struct snd_soc_dapm_path
*p
, int i
)
180 case snd_soc_dapm_switch
:
181 case snd_soc_dapm_mixer
:
182 case snd_soc_dapm_mixer_named_ctl
: {
184 struct soc_mixer_control
*mc
= (struct soc_mixer_control
*)
185 w
->kcontrols
[i
].private_value
;
186 unsigned int reg
= mc
->reg
;
187 unsigned int shift
= mc
->shift
;
189 unsigned int mask
= (1 << fls(max
)) - 1;
190 unsigned int invert
= mc
->invert
;
192 val
= snd_soc_read(w
->codec
, reg
);
193 val
= (val
>> shift
) & mask
;
195 if ((invert
&& !val
) || (!invert
&& val
))
201 case snd_soc_dapm_mux
: {
202 struct soc_enum
*e
= (struct soc_enum
*)w
->kcontrols
[i
].private_value
;
203 int val
, item
, bitmask
;
205 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
207 val
= snd_soc_read(w
->codec
, e
->reg
);
208 item
= (val
>> e
->shift_l
) & (bitmask
- 1);
211 for (i
= 0; i
< e
->max
; i
++) {
212 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
217 case snd_soc_dapm_value_mux
: {
218 struct soc_enum
*e
= (struct soc_enum
*)
219 w
->kcontrols
[i
].private_value
;
222 val
= snd_soc_read(w
->codec
, e
->reg
);
223 val
= (val
>> e
->shift_l
) & e
->mask
;
224 for (item
= 0; item
< e
->max
; item
++) {
225 if (val
== e
->values
[item
])
230 for (i
= 0; i
< e
->max
; i
++) {
231 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
236 /* does not effect routing - always connected */
237 case snd_soc_dapm_pga
:
238 case snd_soc_dapm_output
:
239 case snd_soc_dapm_adc
:
240 case snd_soc_dapm_input
:
241 case snd_soc_dapm_dac
:
242 case snd_soc_dapm_micbias
:
243 case snd_soc_dapm_vmid
:
244 case snd_soc_dapm_supply
:
245 case snd_soc_dapm_aif_in
:
246 case snd_soc_dapm_aif_out
:
249 /* does effect routing - dynamically connected */
250 case snd_soc_dapm_hp
:
251 case snd_soc_dapm_mic
:
252 case snd_soc_dapm_spk
:
253 case snd_soc_dapm_line
:
254 case snd_soc_dapm_pre
:
255 case snd_soc_dapm_post
:
261 /* connect mux widget to its interconnecting audio paths */
262 static int dapm_connect_mux(struct snd_soc_dapm_context
*dapm
,
263 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
264 struct snd_soc_dapm_path
*path
, const char *control_name
,
265 const struct snd_kcontrol_new
*kcontrol
)
267 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
270 for (i
= 0; i
< e
->max
; i
++) {
271 if (!(strcmp(control_name
, e
->texts
[i
]))) {
272 list_add(&path
->list
, &dapm
->paths
);
273 list_add(&path
->list_sink
, &dest
->sources
);
274 list_add(&path
->list_source
, &src
->sinks
);
275 path
->name
= (char*)e
->texts
[i
];
276 dapm_set_path_status(dest
, path
, 0);
284 /* connect mixer widget to its interconnecting audio paths */
285 static int dapm_connect_mixer(struct snd_soc_dapm_context
*dapm
,
286 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
287 struct snd_soc_dapm_path
*path
, const char *control_name
)
291 /* search for mixer kcontrol */
292 for (i
= 0; i
< dest
->num_kcontrols
; i
++) {
293 if (!strcmp(control_name
, dest
->kcontrols
[i
].name
)) {
294 list_add(&path
->list
, &dapm
->paths
);
295 list_add(&path
->list_sink
, &dest
->sources
);
296 list_add(&path
->list_source
, &src
->sinks
);
297 path
->name
= dest
->kcontrols
[i
].name
;
298 dapm_set_path_status(dest
, path
, i
);
305 /* update dapm codec register bits */
306 static int dapm_update_bits(struct snd_soc_dapm_widget
*widget
)
309 unsigned int old
, new;
310 struct snd_soc_codec
*codec
= widget
->codec
;
311 struct snd_soc_dapm_context
*dapm
= widget
->dapm
;
312 struct snd_soc_card
*card
= dapm
->card
;
314 /* check for valid widgets */
315 if (widget
->reg
< 0 || widget
->id
== snd_soc_dapm_input
||
316 widget
->id
== snd_soc_dapm_output
||
317 widget
->id
== snd_soc_dapm_hp
||
318 widget
->id
== snd_soc_dapm_mic
||
319 widget
->id
== snd_soc_dapm_line
||
320 widget
->id
== snd_soc_dapm_spk
)
323 power
= widget
->power
;
325 power
= (power
? 0:1);
327 old
= snd_soc_read(codec
, widget
->reg
);
328 new = (old
& ~(0x1 << widget
->shift
)) | (power
<< widget
->shift
);
332 pop_dbg(dapm
->dev
, card
->pop_time
,
333 "pop test %s : %s in %d ms\n",
334 widget
->name
, widget
->power
? "on" : "off",
336 pop_wait(card
->pop_time
);
337 snd_soc_write(codec
, widget
->reg
, new);
339 dev_dbg(dapm
->dev
, "reg %x old %x new %x change %d\n", widget
->reg
,
344 /* create new dapm mixer control */
345 static int dapm_new_mixer(struct snd_soc_dapm_context
*dapm
,
346 struct snd_soc_dapm_widget
*w
)
350 struct snd_soc_dapm_path
*path
;
351 struct snd_card
*card
= dapm
->codec
->card
->snd_card
;
354 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
357 list_for_each_entry(path
, &w
->sources
, list_sink
) {
359 /* mixer/mux paths name must match control name */
360 if (path
->name
!= (char*)w
->kcontrols
[i
].name
)
363 /* add dapm control with long name.
364 * for dapm_mixer this is the concatenation of the
365 * mixer and kcontrol name.
366 * for dapm_mixer_named_ctl this is simply the
369 name_len
= strlen(w
->kcontrols
[i
].name
) + 1;
370 if (w
->id
!= snd_soc_dapm_mixer_named_ctl
)
371 name_len
+= 1 + strlen(w
->name
);
373 path
->long_name
= kmalloc(name_len
, GFP_KERNEL
);
375 if (path
->long_name
== NULL
)
380 snprintf(path
->long_name
, name_len
, "%s %s",
381 w
->name
, w
->kcontrols
[i
].name
);
383 case snd_soc_dapm_mixer_named_ctl
:
384 snprintf(path
->long_name
, name_len
, "%s",
385 w
->kcontrols
[i
].name
);
389 path
->long_name
[name_len
- 1] = '\0';
391 path
->kcontrol
= snd_soc_cnew(&w
->kcontrols
[i
], w
,
393 ret
= snd_ctl_add(card
, path
->kcontrol
);
396 "asoc: failed to add dapm kcontrol %s: %d\n",
397 path
->long_name
, ret
);
398 kfree(path
->long_name
);
399 path
->long_name
= NULL
;
407 /* create new dapm mux control */
408 static int dapm_new_mux(struct snd_soc_dapm_context
*dapm
,
409 struct snd_soc_dapm_widget
*w
)
411 struct snd_soc_dapm_path
*path
= NULL
;
412 struct snd_kcontrol
*kcontrol
;
413 struct snd_card
*card
= dapm
->codec
->card
->snd_card
;
416 if (!w
->num_kcontrols
) {
417 dev_err(dapm
->dev
, "asoc: mux %s has no controls\n", w
->name
);
421 kcontrol
= snd_soc_cnew(&w
->kcontrols
[0], w
, w
->name
);
422 ret
= snd_ctl_add(card
, kcontrol
);
427 list_for_each_entry(path
, &w
->sources
, list_sink
)
428 path
->kcontrol
= kcontrol
;
433 dev_err(dapm
->dev
, "asoc: failed to add kcontrol %s\n", w
->name
);
437 /* create new dapm volume control */
438 static int dapm_new_pga(struct snd_soc_dapm_context
*dapm
,
439 struct snd_soc_dapm_widget
*w
)
441 if (w
->num_kcontrols
)
442 dev_err(w
->dapm
->dev
,
443 "asoc: PGA controls not supported: '%s'\n", w
->name
);
448 /* reset 'walked' bit for each dapm path */
449 static inline void dapm_clear_walk(struct snd_soc_dapm_context
*dapm
)
451 struct snd_soc_dapm_path
*p
;
453 list_for_each_entry(p
, &dapm
->paths
, list
)
457 /* We implement power down on suspend by checking the power state of
458 * the ALSA card - when we are suspending the ALSA state for the card
461 static int snd_soc_dapm_suspend_check(struct snd_soc_dapm_widget
*widget
)
463 int level
= snd_power_get_state(widget
->dapm
->codec
->card
->snd_card
);
466 case SNDRV_CTL_POWER_D3hot
:
467 case SNDRV_CTL_POWER_D3cold
:
468 if (widget
->ignore_suspend
)
469 dev_dbg(widget
->dapm
->dev
, "%s ignoring suspend\n",
471 return widget
->ignore_suspend
;
478 * Recursively check for a completed path to an active or physically connected
479 * output widget. Returns number of complete paths.
481 static int is_connected_output_ep(struct snd_soc_dapm_widget
*widget
)
483 struct snd_soc_dapm_path
*path
;
486 if (widget
->id
== snd_soc_dapm_supply
)
489 switch (widget
->id
) {
490 case snd_soc_dapm_adc
:
491 case snd_soc_dapm_aif_out
:
493 return snd_soc_dapm_suspend_check(widget
);
498 if (widget
->connected
) {
499 /* connected pin ? */
500 if (widget
->id
== snd_soc_dapm_output
&& !widget
->ext
)
501 return snd_soc_dapm_suspend_check(widget
);
503 /* connected jack or spk ? */
504 if (widget
->id
== snd_soc_dapm_hp
|| widget
->id
== snd_soc_dapm_spk
||
505 (widget
->id
== snd_soc_dapm_line
&& !list_empty(&widget
->sources
)))
506 return snd_soc_dapm_suspend_check(widget
);
509 list_for_each_entry(path
, &widget
->sinks
, list_source
) {
513 if (path
->sink
&& path
->connect
) {
515 con
+= is_connected_output_ep(path
->sink
);
523 * Recursively check for a completed path to an active or physically connected
524 * input widget. Returns number of complete paths.
526 static int is_connected_input_ep(struct snd_soc_dapm_widget
*widget
)
528 struct snd_soc_dapm_path
*path
;
531 if (widget
->id
== snd_soc_dapm_supply
)
534 /* active stream ? */
535 switch (widget
->id
) {
536 case snd_soc_dapm_dac
:
537 case snd_soc_dapm_aif_in
:
539 return snd_soc_dapm_suspend_check(widget
);
544 if (widget
->connected
) {
545 /* connected pin ? */
546 if (widget
->id
== snd_soc_dapm_input
&& !widget
->ext
)
547 return snd_soc_dapm_suspend_check(widget
);
549 /* connected VMID/Bias for lower pops */
550 if (widget
->id
== snd_soc_dapm_vmid
)
551 return snd_soc_dapm_suspend_check(widget
);
553 /* connected jack ? */
554 if (widget
->id
== snd_soc_dapm_mic
||
555 (widget
->id
== snd_soc_dapm_line
&& !list_empty(&widget
->sinks
)))
556 return snd_soc_dapm_suspend_check(widget
);
559 list_for_each_entry(path
, &widget
->sources
, list_sink
) {
563 if (path
->source
&& path
->connect
) {
565 con
+= is_connected_input_ep(path
->source
);
573 * Handler for generic register modifier widget.
575 int dapm_reg_event(struct snd_soc_dapm_widget
*w
,
576 struct snd_kcontrol
*kcontrol
, int event
)
580 if (SND_SOC_DAPM_EVENT_ON(event
))
585 snd_soc_update_bits(w
->codec
, -(w
->reg
+ 1),
586 w
->mask
<< w
->shift
, val
<< w
->shift
);
590 EXPORT_SYMBOL_GPL(dapm_reg_event
);
592 /* Standard power change method, used to apply power changes to most
595 static int dapm_generic_apply_power(struct snd_soc_dapm_widget
*w
)
599 /* call any power change event handlers */
601 dev_dbg(w
->dapm
->dev
, "power %s event for %s flags %x\n",
602 w
->power
? "on" : "off",
603 w
->name
, w
->event_flags
);
605 /* power up pre event */
606 if (w
->power
&& w
->event
&&
607 (w
->event_flags
& SND_SOC_DAPM_PRE_PMU
)) {
608 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMU
);
613 /* power down pre event */
614 if (!w
->power
&& w
->event
&&
615 (w
->event_flags
& SND_SOC_DAPM_PRE_PMD
)) {
616 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMD
);
623 /* power up post event */
624 if (w
->power
&& w
->event
&&
625 (w
->event_flags
& SND_SOC_DAPM_POST_PMU
)) {
627 NULL
, SND_SOC_DAPM_POST_PMU
);
632 /* power down post event */
633 if (!w
->power
&& w
->event
&&
634 (w
->event_flags
& SND_SOC_DAPM_POST_PMD
)) {
635 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_POST_PMD
);
643 /* Generic check to see if a widget should be powered.
645 static int dapm_generic_check_power(struct snd_soc_dapm_widget
*w
)
649 in
= is_connected_input_ep(w
);
650 dapm_clear_walk(w
->dapm
);
651 out
= is_connected_output_ep(w
);
652 dapm_clear_walk(w
->dapm
);
653 return out
!= 0 && in
!= 0;
656 /* Check to see if an ADC has power */
657 static int dapm_adc_check_power(struct snd_soc_dapm_widget
*w
)
662 in
= is_connected_input_ep(w
);
663 dapm_clear_walk(w
->dapm
);
666 return dapm_generic_check_power(w
);
670 /* Check to see if a DAC has power */
671 static int dapm_dac_check_power(struct snd_soc_dapm_widget
*w
)
676 out
= is_connected_output_ep(w
);
677 dapm_clear_walk(w
->dapm
);
680 return dapm_generic_check_power(w
);
684 /* Check to see if a power supply is needed */
685 static int dapm_supply_check_power(struct snd_soc_dapm_widget
*w
)
687 struct snd_soc_dapm_path
*path
;
690 /* Check if one of our outputs is connected */
691 list_for_each_entry(path
, &w
->sinks
, list_source
) {
692 if (path
->connected
&&
693 !path
->connected(path
->source
, path
->sink
))
696 if (path
->sink
&& path
->sink
->power_check
&&
697 path
->sink
->power_check(path
->sink
)) {
703 dapm_clear_walk(w
->dapm
);
708 static int dapm_seq_compare(struct snd_soc_dapm_widget
*a
,
709 struct snd_soc_dapm_widget
*b
,
712 if (sort
[a
->id
] != sort
[b
->id
])
713 return sort
[a
->id
] - sort
[b
->id
];
714 if (a
->reg
!= b
->reg
)
715 return a
->reg
- b
->reg
;
716 if (a
->dapm
!= b
->dapm
)
717 return (unsigned long)a
->dapm
- (unsigned long)b
->dapm
;
722 /* Insert a widget in order into a DAPM power sequence. */
723 static void dapm_seq_insert(struct snd_soc_dapm_widget
*new_widget
,
724 struct list_head
*list
,
727 struct snd_soc_dapm_widget
*w
;
729 list_for_each_entry(w
, list
, power_list
)
730 if (dapm_seq_compare(new_widget
, w
, sort
) < 0) {
731 list_add_tail(&new_widget
->power_list
, &w
->power_list
);
735 list_add_tail(&new_widget
->power_list
, list
);
738 static void dapm_seq_check_event(struct snd_soc_dapm_context
*dapm
,
739 struct snd_soc_dapm_widget
*w
, int event
)
741 struct snd_soc_card
*card
= dapm
->card
;
746 case SND_SOC_DAPM_PRE_PMU
:
750 case SND_SOC_DAPM_POST_PMU
:
751 ev_name
= "POST_PMU";
754 case SND_SOC_DAPM_PRE_PMD
:
758 case SND_SOC_DAPM_POST_PMD
:
759 ev_name
= "POST_PMD";
767 if (w
->power
!= power
)
770 if (w
->event
&& (w
->event_flags
& event
)) {
771 pop_dbg(dapm
->dev
, card
->pop_time
, "pop test : %s %s\n",
773 trace_snd_soc_dapm_widget_event_start(w
, event
);
774 ret
= w
->event(w
, NULL
, event
);
775 trace_snd_soc_dapm_widget_event_done(w
, event
);
777 pr_err("%s: %s event failed: %d\n",
778 ev_name
, w
->name
, ret
);
782 /* Apply the coalesced changes from a DAPM sequence */
783 static void dapm_seq_run_coalesced(struct snd_soc_dapm_context
*dapm
,
784 struct list_head
*pending
)
786 struct snd_soc_card
*card
= dapm
->card
;
787 struct snd_soc_dapm_widget
*w
;
789 unsigned int value
= 0;
790 unsigned int mask
= 0;
791 unsigned int cur_mask
;
793 reg
= list_first_entry(pending
, struct snd_soc_dapm_widget
,
796 list_for_each_entry(w
, pending
, power_list
) {
797 cur_mask
= 1 << w
->shift
;
798 BUG_ON(reg
!= w
->reg
);
809 pop_dbg(dapm
->dev
, card
->pop_time
,
810 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
811 w
->name
, reg
, value
, mask
);
813 /* Check for events */
814 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMU
);
815 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_PRE_PMD
);
819 pop_dbg(dapm
->dev
, card
->pop_time
,
820 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
821 value
, mask
, reg
, card
->pop_time
);
822 pop_wait(card
->pop_time
);
823 snd_soc_update_bits(dapm
->codec
, reg
, mask
, value
);
826 list_for_each_entry(w
, pending
, power_list
) {
827 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMU
);
828 dapm_seq_check_event(dapm
, w
, SND_SOC_DAPM_POST_PMD
);
832 /* Apply a DAPM power sequence.
834 * We walk over a pre-sorted list of widgets to apply power to. In
835 * order to minimise the number of writes to the device required
836 * multiple widgets will be updated in a single write where possible.
837 * Currently anything that requires more than a single write is not
840 static void dapm_seq_run(struct snd_soc_dapm_context
*dapm
,
841 struct list_head
*list
, int event
, int sort
[])
843 struct snd_soc_dapm_widget
*w
, *n
;
846 int cur_reg
= SND_SOC_NOPM
;
849 list_for_each_entry_safe(w
, n
, list
, power_list
) {
852 /* Do we need to apply any queued changes? */
853 if (sort
[w
->id
] != cur_sort
|| w
->reg
!= cur_reg
) {
854 if (!list_empty(&pending
))
855 dapm_seq_run_coalesced(dapm
, &pending
);
857 INIT_LIST_HEAD(&pending
);
859 cur_reg
= SND_SOC_NOPM
;
863 case snd_soc_dapm_pre
:
865 list_for_each_entry_safe_continue(w
, n
, list
,
868 if (event
== SND_SOC_DAPM_STREAM_START
)
870 NULL
, SND_SOC_DAPM_PRE_PMU
);
871 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
873 NULL
, SND_SOC_DAPM_PRE_PMD
);
876 case snd_soc_dapm_post
:
878 list_for_each_entry_safe_continue(w
, n
, list
,
881 if (event
== SND_SOC_DAPM_STREAM_START
)
883 NULL
, SND_SOC_DAPM_POST_PMU
);
884 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
886 NULL
, SND_SOC_DAPM_POST_PMD
);
889 case snd_soc_dapm_input
:
890 case snd_soc_dapm_output
:
891 case snd_soc_dapm_hp
:
892 case snd_soc_dapm_mic
:
893 case snd_soc_dapm_line
:
894 case snd_soc_dapm_spk
:
895 /* No register support currently */
896 ret
= dapm_generic_apply_power(w
);
900 /* Queue it up for application */
901 cur_sort
= sort
[w
->id
];
903 list_move(&w
->power_list
, &pending
);
908 dev_err(w
->dapm
->dev
,
909 "Failed to apply widget power: %d\n", ret
);
912 if (!list_empty(&pending
))
913 dapm_seq_run_coalesced(dapm
, &pending
);
917 * Scan each dapm widget for complete audio path.
918 * A complete path is a route that has valid endpoints i.e.:-
920 * o DAC to output pin.
921 * o Input Pin to ADC.
922 * o Input pin to Output pin (bypass, sidetone)
923 * o DAC to ADC (loopback).
925 static int dapm_power_widgets(struct snd_soc_dapm_context
*dapm
, int event
)
927 struct snd_soc_card
*card
= dapm
->codec
->card
;
928 struct snd_soc_dapm_widget
*w
;
930 LIST_HEAD(down_list
);
935 trace_snd_soc_dapm_start(card
);
937 /* Check which widgets we need to power and store them in
938 * lists indicating if they should be powered up or down.
940 list_for_each_entry(w
, &dapm
->widgets
, list
) {
942 case snd_soc_dapm_pre
:
943 dapm_seq_insert(w
, &down_list
, dapm_down_seq
);
945 case snd_soc_dapm_post
:
946 dapm_seq_insert(w
, &up_list
, dapm_up_seq
);
954 power
= w
->power_check(w
);
960 if (w
->power
== power
)
963 trace_snd_soc_dapm_widget_power(w
, power
);
966 dapm_seq_insert(w
, &up_list
, dapm_up_seq
);
968 dapm_seq_insert(w
, &down_list
, dapm_down_seq
);
975 /* If there are no DAPM widgets then try to figure out power from the
978 if (list_empty(&dapm
->widgets
)) {
980 case SND_SOC_DAPM_STREAM_START
:
981 case SND_SOC_DAPM_STREAM_RESUME
:
984 case SND_SOC_DAPM_STREAM_SUSPEND
:
987 case SND_SOC_DAPM_STREAM_NOP
:
988 switch (dapm
->bias_level
) {
989 case SND_SOC_BIAS_STANDBY
:
990 case SND_SOC_BIAS_OFF
:
1003 if (sys_power
&& dapm
->bias_level
== SND_SOC_BIAS_OFF
) {
1004 ret
= snd_soc_dapm_set_bias_level(card
, dapm
,
1005 SND_SOC_BIAS_STANDBY
);
1008 "Failed to turn on bias: %d\n", ret
);
1011 /* If we're changing to all on or all off then prepare */
1012 if ((sys_power
&& dapm
->bias_level
== SND_SOC_BIAS_STANDBY
) ||
1013 (!sys_power
&& dapm
->bias_level
== SND_SOC_BIAS_ON
)) {
1014 ret
= snd_soc_dapm_set_bias_level(card
, dapm
, SND_SOC_BIAS_PREPARE
);
1017 "Failed to prepare bias: %d\n", ret
);
1020 /* Power down widgets first; try to avoid amplifying pops. */
1021 dapm_seq_run(dapm
, &down_list
, event
, dapm_down_seq
);
1024 dapm_seq_run(dapm
, &up_list
, event
, dapm_up_seq
);
1026 /* If we just powered the last thing off drop to standby bias */
1027 if (dapm
->bias_level
== SND_SOC_BIAS_PREPARE
&& !sys_power
) {
1028 ret
= snd_soc_dapm_set_bias_level(card
, dapm
, SND_SOC_BIAS_STANDBY
);
1031 "Failed to apply standby bias: %d\n", ret
);
1034 /* If we're in standby and can support bias off then do that */
1035 if (dapm
->bias_level
== SND_SOC_BIAS_STANDBY
&&
1036 dapm
->idle_bias_off
) {
1037 ret
= snd_soc_dapm_set_bias_level(card
, dapm
, SND_SOC_BIAS_OFF
);
1040 "Failed to turn off bias: %d\n", ret
);
1043 /* If we just powered up then move to active bias */
1044 if (dapm
->bias_level
== SND_SOC_BIAS_PREPARE
&& sys_power
) {
1045 ret
= snd_soc_dapm_set_bias_level(card
, dapm
, SND_SOC_BIAS_ON
);
1048 "Failed to apply active bias: %d\n", ret
);
1051 pop_dbg(dapm
->dev
, card
->pop_time
,
1052 "DAPM sequencing finished, waiting %dms\n", card
->pop_time
);
1053 pop_wait(card
->pop_time
);
1055 trace_snd_soc_dapm_done(card
);
1060 #ifdef CONFIG_DEBUG_FS
1061 static int dapm_widget_power_open_file(struct inode
*inode
, struct file
*file
)
1063 file
->private_data
= inode
->i_private
;
1067 static ssize_t
dapm_widget_power_read_file(struct file
*file
,
1068 char __user
*user_buf
,
1069 size_t count
, loff_t
*ppos
)
1071 struct snd_soc_dapm_widget
*w
= file
->private_data
;
1075 struct snd_soc_dapm_path
*p
= NULL
;
1077 buf
= kmalloc(PAGE_SIZE
, GFP_KERNEL
);
1081 in
= is_connected_input_ep(w
);
1082 dapm_clear_walk(w
->dapm
);
1083 out
= is_connected_output_ep(w
);
1084 dapm_clear_walk(w
->dapm
);
1086 ret
= snprintf(buf
, PAGE_SIZE
, "%s: %s in %d out %d",
1087 w
->name
, w
->power
? "On" : "Off", in
, out
);
1090 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1091 " - R%d(0x%x) bit %d",
1092 w
->reg
, w
->reg
, w
->shift
);
1094 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, "\n");
1097 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
, " stream %s %s\n",
1099 w
->active
? "active" : "inactive");
1101 list_for_each_entry(p
, &w
->sources
, list_sink
) {
1102 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1106 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1108 p
->name
? p
->name
: "static",
1111 list_for_each_entry(p
, &w
->sinks
, list_source
) {
1112 if (p
->connected
&& !p
->connected(w
, p
->sink
))
1116 ret
+= snprintf(buf
+ ret
, PAGE_SIZE
- ret
,
1118 p
->name
? p
->name
: "static",
1122 ret
= simple_read_from_buffer(user_buf
, count
, ppos
, buf
, ret
);
1128 static const struct file_operations dapm_widget_power_fops
= {
1129 .open
= dapm_widget_power_open_file
,
1130 .read
= dapm_widget_power_read_file
,
1131 .llseek
= default_llseek
,
1134 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
)
1136 struct snd_soc_dapm_widget
*w
;
1139 if (!dapm
->debugfs_dapm
)
1142 list_for_each_entry(w
, &dapm
->widgets
, list
) {
1146 d
= debugfs_create_file(w
->name
, 0444,
1147 dapm
->debugfs_dapm
, w
,
1148 &dapm_widget_power_fops
);
1150 dev_warn(w
->dapm
->dev
,
1151 "ASoC: Failed to create %s debugfs file\n",
1156 void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context
*dapm
)
1161 /* test and update the power status of a mux widget */
1162 static int dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
1163 struct snd_kcontrol
*kcontrol
, int change
,
1164 int mux
, struct soc_enum
*e
)
1166 struct snd_soc_dapm_path
*path
;
1169 if (widget
->id
!= snd_soc_dapm_mux
&&
1170 widget
->id
!= snd_soc_dapm_value_mux
)
1176 /* find dapm widget path assoc with kcontrol */
1177 list_for_each_entry(path
, &widget
->dapm
->paths
, list
) {
1178 if (path
->kcontrol
!= kcontrol
)
1181 if (!path
->name
|| !e
->texts
[mux
])
1185 /* we now need to match the string in the enum to the path */
1186 if (!(strcmp(path
->name
, e
->texts
[mux
])))
1187 path
->connect
= 1; /* new connection */
1189 path
->connect
= 0; /* old connection must be powered down */
1193 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1198 /* test and update the power status of a mixer or switch widget */
1199 static int dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
1200 struct snd_kcontrol
*kcontrol
, int connect
)
1202 struct snd_soc_dapm_path
*path
;
1205 if (widget
->id
!= snd_soc_dapm_mixer
&&
1206 widget
->id
!= snd_soc_dapm_mixer_named_ctl
&&
1207 widget
->id
!= snd_soc_dapm_switch
)
1210 /* find dapm widget path assoc with kcontrol */
1211 list_for_each_entry(path
, &widget
->dapm
->paths
, list
) {
1212 if (path
->kcontrol
!= kcontrol
)
1215 /* found, now check type */
1217 path
->connect
= connect
;
1222 dapm_power_widgets(widget
->dapm
, SND_SOC_DAPM_STREAM_NOP
);
1227 /* show dapm widget status in sys fs */
1228 static ssize_t
dapm_widget_show(struct device
*dev
,
1229 struct device_attribute
*attr
, char *buf
)
1231 struct snd_soc_pcm_runtime
*rtd
=
1232 container_of(dev
, struct snd_soc_pcm_runtime
, dev
);
1233 struct snd_soc_codec
*codec
=rtd
->codec
;
1234 struct snd_soc_dapm_widget
*w
;
1236 char *state
= "not set";
1238 list_for_each_entry(w
, &codec
->dapm
.widgets
, list
) {
1240 /* only display widgets that burnm power */
1242 case snd_soc_dapm_hp
:
1243 case snd_soc_dapm_mic
:
1244 case snd_soc_dapm_spk
:
1245 case snd_soc_dapm_line
:
1246 case snd_soc_dapm_micbias
:
1247 case snd_soc_dapm_dac
:
1248 case snd_soc_dapm_adc
:
1249 case snd_soc_dapm_pga
:
1250 case snd_soc_dapm_mixer
:
1251 case snd_soc_dapm_mixer_named_ctl
:
1252 case snd_soc_dapm_supply
:
1254 count
+= sprintf(buf
+ count
, "%s: %s\n",
1255 w
->name
, w
->power
? "On":"Off");
1262 switch (codec
->dapm
.bias_level
) {
1263 case SND_SOC_BIAS_ON
:
1266 case SND_SOC_BIAS_PREPARE
:
1269 case SND_SOC_BIAS_STANDBY
:
1272 case SND_SOC_BIAS_OFF
:
1276 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
1281 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
1283 int snd_soc_dapm_sys_add(struct device
*dev
)
1285 return device_create_file(dev
, &dev_attr_dapm_widget
);
1288 static void snd_soc_dapm_sys_remove(struct device
*dev
)
1290 device_remove_file(dev
, &dev_attr_dapm_widget
);
1293 /* free all dapm widgets and resources */
1294 static void dapm_free_widgets(struct snd_soc_dapm_context
*dapm
)
1296 struct snd_soc_dapm_widget
*w
, *next_w
;
1297 struct snd_soc_dapm_path
*p
, *next_p
;
1299 list_for_each_entry_safe(w
, next_w
, &dapm
->widgets
, list
) {
1305 list_for_each_entry_safe(p
, next_p
, &dapm
->paths
, list
) {
1307 kfree(p
->long_name
);
1312 static int snd_soc_dapm_set_pin(struct snd_soc_dapm_context
*dapm
,
1313 const char *pin
, int status
)
1315 struct snd_soc_dapm_widget
*w
;
1317 list_for_each_entry(w
, &dapm
->widgets
, list
) {
1318 if (!strcmp(w
->name
, pin
)) {
1319 dev_dbg(w
->dapm
->dev
, "dapm: pin %s = %d\n",
1321 w
->connected
= status
;
1322 /* Allow disabling of forced pins */
1329 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
1334 * snd_soc_dapm_sync - scan and power dapm paths
1335 * @dapm: DAPM context
1337 * Walks all dapm audio paths and powers widgets according to their
1338 * stream or path usage.
1340 * Returns 0 for success.
1342 int snd_soc_dapm_sync(struct snd_soc_dapm_context
*dapm
)
1344 return dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
1346 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
1348 static int snd_soc_dapm_add_route(struct snd_soc_dapm_context
*dapm
,
1349 const struct snd_soc_dapm_route
*route
)
1351 struct snd_soc_dapm_path
*path
;
1352 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
1354 const char *control
= route
->control
;
1356 char prefixed_sink
[80];
1357 char prefixed_source
[80];
1360 if (dapm
->codec
->name_prefix
) {
1361 snprintf(prefixed_sink
, sizeof(prefixed_sink
), "%s %s",
1362 dapm
->codec
->name_prefix
, route
->sink
);
1363 sink
= prefixed_sink
;
1364 snprintf(prefixed_source
, sizeof(prefixed_source
), "%s %s",
1365 dapm
->codec
->name_prefix
, route
->source
);
1366 source
= prefixed_source
;
1369 source
= route
->source
;
1372 /* find src and dest widgets */
1373 list_for_each_entry(w
, &dapm
->widgets
, list
) {
1375 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
1379 if (!wsource
&& !(strcmp(w
->name
, source
))) {
1384 if (wsource
== NULL
|| wsink
== NULL
)
1387 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
1391 path
->source
= wsource
;
1393 path
->connected
= route
->connected
;
1394 INIT_LIST_HEAD(&path
->list
);
1395 INIT_LIST_HEAD(&path
->list_source
);
1396 INIT_LIST_HEAD(&path
->list_sink
);
1398 /* check for external widgets */
1399 if (wsink
->id
== snd_soc_dapm_input
) {
1400 if (wsource
->id
== snd_soc_dapm_micbias
||
1401 wsource
->id
== snd_soc_dapm_mic
||
1402 wsource
->id
== snd_soc_dapm_line
||
1403 wsource
->id
== snd_soc_dapm_output
)
1406 if (wsource
->id
== snd_soc_dapm_output
) {
1407 if (wsink
->id
== snd_soc_dapm_spk
||
1408 wsink
->id
== snd_soc_dapm_hp
||
1409 wsink
->id
== snd_soc_dapm_line
||
1410 wsink
->id
== snd_soc_dapm_input
)
1414 /* connect static paths */
1415 if (control
== NULL
) {
1416 list_add(&path
->list
, &dapm
->paths
);
1417 list_add(&path
->list_sink
, &wsink
->sources
);
1418 list_add(&path
->list_source
, &wsource
->sinks
);
1423 /* connect dynamic paths */
1425 case snd_soc_dapm_adc
:
1426 case snd_soc_dapm_dac
:
1427 case snd_soc_dapm_pga
:
1428 case snd_soc_dapm_input
:
1429 case snd_soc_dapm_output
:
1430 case snd_soc_dapm_micbias
:
1431 case snd_soc_dapm_vmid
:
1432 case snd_soc_dapm_pre
:
1433 case snd_soc_dapm_post
:
1434 case snd_soc_dapm_supply
:
1435 case snd_soc_dapm_aif_in
:
1436 case snd_soc_dapm_aif_out
:
1437 list_add(&path
->list
, &dapm
->paths
);
1438 list_add(&path
->list_sink
, &wsink
->sources
);
1439 list_add(&path
->list_source
, &wsource
->sinks
);
1442 case snd_soc_dapm_mux
:
1443 case snd_soc_dapm_value_mux
:
1444 ret
= dapm_connect_mux(dapm
, wsource
, wsink
, path
, control
,
1445 &wsink
->kcontrols
[0]);
1449 case snd_soc_dapm_switch
:
1450 case snd_soc_dapm_mixer
:
1451 case snd_soc_dapm_mixer_named_ctl
:
1452 ret
= dapm_connect_mixer(dapm
, wsource
, wsink
, path
, control
);
1456 case snd_soc_dapm_hp
:
1457 case snd_soc_dapm_mic
:
1458 case snd_soc_dapm_line
:
1459 case snd_soc_dapm_spk
:
1460 list_add(&path
->list
, &dapm
->paths
);
1461 list_add(&path
->list_sink
, &wsink
->sources
);
1462 list_add(&path
->list_source
, &wsource
->sinks
);
1469 dev_warn(dapm
->dev
, "asoc: no dapm match for %s --> %s --> %s\n",
1470 source
, control
, sink
);
1476 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1477 * @dapm: DAPM context
1478 * @route: audio routes
1479 * @num: number of routes
1481 * Connects 2 dapm widgets together via a named audio path. The sink is
1482 * the widget receiving the audio signal, whilst the source is the sender
1483 * of the audio signal.
1485 * Returns 0 for success else error. On error all resources can be freed
1486 * with a call to snd_soc_card_free().
1488 int snd_soc_dapm_add_routes(struct snd_soc_dapm_context
*dapm
,
1489 const struct snd_soc_dapm_route
*route
, int num
)
1493 for (i
= 0; i
< num
; i
++) {
1494 ret
= snd_soc_dapm_add_route(dapm
, route
);
1496 dev_err(dapm
->dev
, "Failed to add route %s->%s\n",
1497 route
->source
, route
->sink
);
1505 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
1508 * snd_soc_dapm_new_widgets - add new dapm widgets
1509 * @dapm: DAPM context
1511 * Checks the codec for any new dapm widgets and creates them if found.
1513 * Returns 0 for success.
1515 int snd_soc_dapm_new_widgets(struct snd_soc_dapm_context
*dapm
)
1517 struct snd_soc_dapm_widget
*w
;
1519 list_for_each_entry(w
, &dapm
->widgets
, list
)
1525 case snd_soc_dapm_switch
:
1526 case snd_soc_dapm_mixer
:
1527 case snd_soc_dapm_mixer_named_ctl
:
1528 w
->power_check
= dapm_generic_check_power
;
1529 dapm_new_mixer(dapm
, w
);
1531 case snd_soc_dapm_mux
:
1532 case snd_soc_dapm_value_mux
:
1533 w
->power_check
= dapm_generic_check_power
;
1534 dapm_new_mux(dapm
, w
);
1536 case snd_soc_dapm_adc
:
1537 case snd_soc_dapm_aif_out
:
1538 w
->power_check
= dapm_adc_check_power
;
1540 case snd_soc_dapm_dac
:
1541 case snd_soc_dapm_aif_in
:
1542 w
->power_check
= dapm_dac_check_power
;
1544 case snd_soc_dapm_pga
:
1545 w
->power_check
= dapm_generic_check_power
;
1546 dapm_new_pga(dapm
, w
);
1548 case snd_soc_dapm_input
:
1549 case snd_soc_dapm_output
:
1550 case snd_soc_dapm_micbias
:
1551 case snd_soc_dapm_spk
:
1552 case snd_soc_dapm_hp
:
1553 case snd_soc_dapm_mic
:
1554 case snd_soc_dapm_line
:
1555 w
->power_check
= dapm_generic_check_power
;
1557 case snd_soc_dapm_supply
:
1558 w
->power_check
= dapm_supply_check_power
;
1559 case snd_soc_dapm_vmid
:
1560 case snd_soc_dapm_pre
:
1561 case snd_soc_dapm_post
:
1567 dapm_power_widgets(dapm
, SND_SOC_DAPM_STREAM_NOP
);
1570 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
1573 * snd_soc_dapm_get_volsw - dapm mixer get callback
1574 * @kcontrol: mixer control
1575 * @ucontrol: control element information
1577 * Callback to get the value of a dapm mixer control.
1579 * Returns 0 for success.
1581 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
1582 struct snd_ctl_elem_value
*ucontrol
)
1584 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1585 struct soc_mixer_control
*mc
=
1586 (struct soc_mixer_control
*)kcontrol
->private_value
;
1587 unsigned int reg
= mc
->reg
;
1588 unsigned int shift
= mc
->shift
;
1589 unsigned int rshift
= mc
->rshift
;
1591 unsigned int invert
= mc
->invert
;
1592 unsigned int mask
= (1 << fls(max
)) - 1;
1594 ucontrol
->value
.integer
.value
[0] =
1595 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
1596 if (shift
!= rshift
)
1597 ucontrol
->value
.integer
.value
[1] =
1598 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
1600 ucontrol
->value
.integer
.value
[0] =
1601 max
- ucontrol
->value
.integer
.value
[0];
1602 if (shift
!= rshift
)
1603 ucontrol
->value
.integer
.value
[1] =
1604 max
- ucontrol
->value
.integer
.value
[1];
1609 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
1612 * snd_soc_dapm_put_volsw - dapm mixer set callback
1613 * @kcontrol: mixer control
1614 * @ucontrol: control element information
1616 * Callback to set the value of a dapm mixer control.
1618 * Returns 0 for success.
1620 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
1621 struct snd_ctl_elem_value
*ucontrol
)
1623 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1624 struct soc_mixer_control
*mc
=
1625 (struct soc_mixer_control
*)kcontrol
->private_value
;
1626 unsigned int reg
= mc
->reg
;
1627 unsigned int shift
= mc
->shift
;
1628 unsigned int rshift
= mc
->rshift
;
1630 unsigned int mask
= (1 << fls(max
)) - 1;
1631 unsigned int invert
= mc
->invert
;
1632 unsigned int val
, val2
, val_mask
;
1636 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1640 val_mask
= mask
<< shift
;
1642 if (shift
!= rshift
) {
1643 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1646 val_mask
|= mask
<< rshift
;
1647 val
|= val2
<< rshift
;
1650 mutex_lock(&widget
->codec
->mutex
);
1651 widget
->value
= val
;
1653 if (snd_soc_test_bits(widget
->codec
, reg
, val_mask
, val
)) {
1655 /* new connection */
1656 connect
= invert
? 0:1;
1658 /* old connection must be powered down */
1659 connect
= invert
? 1:0;
1661 dapm_mixer_update_power(widget
, kcontrol
, connect
);
1664 if (widget
->event
) {
1665 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1666 ret
= widget
->event(widget
, kcontrol
,
1667 SND_SOC_DAPM_PRE_REG
);
1673 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1674 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1675 ret
= widget
->event(widget
, kcontrol
,
1676 SND_SOC_DAPM_POST_REG
);
1678 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1681 mutex_unlock(&widget
->codec
->mutex
);
1684 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
1687 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1688 * @kcontrol: mixer control
1689 * @ucontrol: control element information
1691 * Callback to get the value of a dapm enumerated double mixer control.
1693 * Returns 0 for success.
1695 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
1696 struct snd_ctl_elem_value
*ucontrol
)
1698 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1699 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1700 unsigned int val
, bitmask
;
1702 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1704 val
= snd_soc_read(widget
->codec
, e
->reg
);
1705 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
1706 if (e
->shift_l
!= e
->shift_r
)
1707 ucontrol
->value
.enumerated
.item
[1] =
1708 (val
>> e
->shift_r
) & (bitmask
- 1);
1712 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
1715 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1716 * @kcontrol: mixer control
1717 * @ucontrol: control element information
1719 * Callback to set the value of a dapm enumerated double mixer control.
1721 * Returns 0 for success.
1723 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
1724 struct snd_ctl_elem_value
*ucontrol
)
1726 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1727 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1728 unsigned int val
, mux
, change
;
1729 unsigned int mask
, bitmask
;
1732 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1734 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1736 mux
= ucontrol
->value
.enumerated
.item
[0];
1737 val
= mux
<< e
->shift_l
;
1738 mask
= (bitmask
- 1) << e
->shift_l
;
1739 if (e
->shift_l
!= e
->shift_r
) {
1740 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1742 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1743 mask
|= (bitmask
- 1) << e
->shift_r
;
1746 mutex_lock(&widget
->codec
->mutex
);
1747 widget
->value
= val
;
1748 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
1749 dapm_mux_update_power(widget
, kcontrol
, change
, mux
, e
);
1751 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1752 ret
= widget
->event(widget
,
1753 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1758 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1760 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1761 ret
= widget
->event(widget
,
1762 kcontrol
, SND_SOC_DAPM_POST_REG
);
1765 mutex_unlock(&widget
->codec
->mutex
);
1768 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
1771 * snd_soc_dapm_get_enum_virt - Get virtual DAPM mux
1772 * @kcontrol: mixer control
1773 * @ucontrol: control element information
1775 * Returns 0 for success.
1777 int snd_soc_dapm_get_enum_virt(struct snd_kcontrol
*kcontrol
,
1778 struct snd_ctl_elem_value
*ucontrol
)
1780 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1782 ucontrol
->value
.enumerated
.item
[0] = widget
->value
;
1786 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_virt
);
1789 * snd_soc_dapm_put_enum_virt - Set virtual DAPM mux
1790 * @kcontrol: mixer control
1791 * @ucontrol: control element information
1793 * Returns 0 for success.
1795 int snd_soc_dapm_put_enum_virt(struct snd_kcontrol
*kcontrol
,
1796 struct snd_ctl_elem_value
*ucontrol
)
1798 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1799 struct soc_enum
*e
=
1800 (struct soc_enum
*)kcontrol
->private_value
;
1804 if (ucontrol
->value
.enumerated
.item
[0] >= e
->max
)
1807 mutex_lock(&widget
->codec
->mutex
);
1809 change
= widget
->value
!= ucontrol
->value
.enumerated
.item
[0];
1810 widget
->value
= ucontrol
->value
.enumerated
.item
[0];
1811 dapm_mux_update_power(widget
, kcontrol
, change
, widget
->value
, e
);
1813 mutex_unlock(&widget
->codec
->mutex
);
1816 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_virt
);
1819 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1821 * @kcontrol: mixer control
1822 * @ucontrol: control element information
1824 * Callback to get the value of a dapm semi enumerated double mixer control.
1826 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1827 * used for handling bitfield coded enumeration for example.
1829 * Returns 0 for success.
1831 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
1832 struct snd_ctl_elem_value
*ucontrol
)
1834 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1835 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1836 unsigned int reg_val
, val
, mux
;
1838 reg_val
= snd_soc_read(widget
->codec
, e
->reg
);
1839 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
1840 for (mux
= 0; mux
< e
->max
; mux
++) {
1841 if (val
== e
->values
[mux
])
1844 ucontrol
->value
.enumerated
.item
[0] = mux
;
1845 if (e
->shift_l
!= e
->shift_r
) {
1846 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
1847 for (mux
= 0; mux
< e
->max
; mux
++) {
1848 if (val
== e
->values
[mux
])
1851 ucontrol
->value
.enumerated
.item
[1] = mux
;
1856 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double
);
1859 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1861 * @kcontrol: mixer control
1862 * @ucontrol: control element information
1864 * Callback to set the value of a dapm semi enumerated double mixer control.
1866 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1867 * used for handling bitfield coded enumeration for example.
1869 * Returns 0 for success.
1871 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
1872 struct snd_ctl_elem_value
*ucontrol
)
1874 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1875 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1876 unsigned int val
, mux
, change
;
1880 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1882 mux
= ucontrol
->value
.enumerated
.item
[0];
1883 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
1884 mask
= e
->mask
<< e
->shift_l
;
1885 if (e
->shift_l
!= e
->shift_r
) {
1886 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1888 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
1889 mask
|= e
->mask
<< e
->shift_r
;
1892 mutex_lock(&widget
->codec
->mutex
);
1893 widget
->value
= val
;
1894 change
= snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
);
1895 dapm_mux_update_power(widget
, kcontrol
, change
, mux
, e
);
1897 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1898 ret
= widget
->event(widget
,
1899 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1904 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1906 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1907 ret
= widget
->event(widget
,
1908 kcontrol
, SND_SOC_DAPM_POST_REG
);
1911 mutex_unlock(&widget
->codec
->mutex
);
1914 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double
);
1917 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1919 * @kcontrol: mixer control
1920 * @uinfo: control element information
1922 * Callback to provide information about a pin switch control.
1924 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol
*kcontrol
,
1925 struct snd_ctl_elem_info
*uinfo
)
1927 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1929 uinfo
->value
.integer
.min
= 0;
1930 uinfo
->value
.integer
.max
= 1;
1934 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch
);
1937 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1939 * @kcontrol: mixer control
1942 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol
*kcontrol
,
1943 struct snd_ctl_elem_value
*ucontrol
)
1945 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1946 const char *pin
= (const char *)kcontrol
->private_value
;
1948 mutex_lock(&codec
->mutex
);
1950 ucontrol
->value
.integer
.value
[0] =
1951 snd_soc_dapm_get_pin_status(&codec
->dapm
, pin
);
1953 mutex_unlock(&codec
->mutex
);
1957 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch
);
1960 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1962 * @kcontrol: mixer control
1965 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol
*kcontrol
,
1966 struct snd_ctl_elem_value
*ucontrol
)
1968 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1969 const char *pin
= (const char *)kcontrol
->private_value
;
1971 mutex_lock(&codec
->mutex
);
1973 if (ucontrol
->value
.integer
.value
[0])
1974 snd_soc_dapm_enable_pin(&codec
->dapm
, pin
);
1976 snd_soc_dapm_disable_pin(&codec
->dapm
, pin
);
1978 snd_soc_dapm_sync(&codec
->dapm
);
1980 mutex_unlock(&codec
->mutex
);
1984 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch
);
1987 * snd_soc_dapm_new_control - create new dapm control
1988 * @dapm: DAPM context
1989 * @widget: widget template
1991 * Creates a new dapm control based upon the template.
1993 * Returns 0 for success else error.
1995 int snd_soc_dapm_new_control(struct snd_soc_dapm_context
*dapm
,
1996 const struct snd_soc_dapm_widget
*widget
)
1998 struct snd_soc_dapm_widget
*w
;
2001 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
2004 name_len
= strlen(widget
->name
) + 1;
2005 if (dapm
->codec
->name_prefix
)
2006 name_len
+= 1 + strlen(dapm
->codec
->name_prefix
);
2007 w
->name
= kmalloc(name_len
, GFP_KERNEL
);
2008 if (w
->name
== NULL
) {
2012 if (dapm
->codec
->name_prefix
)
2013 snprintf(w
->name
, name_len
, "%s %s",
2014 dapm
->codec
->name_prefix
, widget
->name
);
2016 snprintf(w
->name
, name_len
, "%s", widget
->name
);
2019 w
->codec
= dapm
->codec
;
2020 INIT_LIST_HEAD(&w
->sources
);
2021 INIT_LIST_HEAD(&w
->sinks
);
2022 INIT_LIST_HEAD(&w
->list
);
2023 list_add(&w
->list
, &dapm
->widgets
);
2025 /* machine layer set ups unconnected pins and insertions */
2029 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
2032 * snd_soc_dapm_new_controls - create new dapm controls
2033 * @dapm: DAPM context
2034 * @widget: widget array
2035 * @num: number of widgets
2037 * Creates new DAPM controls based upon the templates.
2039 * Returns 0 for success else error.
2041 int snd_soc_dapm_new_controls(struct snd_soc_dapm_context
*dapm
,
2042 const struct snd_soc_dapm_widget
*widget
,
2047 for (i
= 0; i
< num
; i
++) {
2048 ret
= snd_soc_dapm_new_control(dapm
, widget
);
2051 "ASoC: Failed to create DAPM control %s: %d\n",
2059 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
2061 static void soc_dapm_stream_event(struct snd_soc_dapm_context
*dapm
,
2062 const char *stream
, int event
)
2064 struct snd_soc_dapm_widget
*w
;
2066 list_for_each_entry(w
, &dapm
->widgets
, list
)
2070 dev_dbg(w
->dapm
->dev
, "widget %s\n %s stream %s event %d\n",
2071 w
->name
, w
->sname
, stream
, event
);
2072 if (strstr(w
->sname
, stream
)) {
2074 case SND_SOC_DAPM_STREAM_START
:
2077 case SND_SOC_DAPM_STREAM_STOP
:
2080 case SND_SOC_DAPM_STREAM_SUSPEND
:
2081 case SND_SOC_DAPM_STREAM_RESUME
:
2082 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
2083 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
2089 dapm_power_widgets(dapm
, event
);
2093 * snd_soc_dapm_stream_event - send a stream event to the dapm core
2094 * @rtd: PCM runtime data
2095 * @stream: stream name
2096 * @event: stream event
2098 * Sends a stream event to the dapm core. The core then makes any
2099 * necessary widget power changes.
2101 * Returns 0 for success else error.
2103 int snd_soc_dapm_stream_event(struct snd_soc_pcm_runtime
*rtd
,
2104 const char *stream
, int event
)
2106 struct snd_soc_codec
*codec
= rtd
->codec
;
2111 mutex_lock(&codec
->mutex
);
2112 soc_dapm_stream_event(&codec
->dapm
, stream
, event
);
2113 mutex_unlock(&codec
->mutex
);
2116 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event
);
2119 * snd_soc_dapm_enable_pin - enable pin.
2120 * @dapm: DAPM context
2123 * Enables input/output pin and its parents or children widgets iff there is
2124 * a valid audio route and active audio stream.
2125 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2126 * do any widget power switching.
2128 int snd_soc_dapm_enable_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
2130 return snd_soc_dapm_set_pin(dapm
, pin
, 1);
2132 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
2135 * snd_soc_dapm_force_enable_pin - force a pin to be enabled
2136 * @dapm: DAPM context
2139 * Enables input/output pin regardless of any other state. This is
2140 * intended for use with microphone bias supplies used in microphone
2143 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2144 * do any widget power switching.
2146 int snd_soc_dapm_force_enable_pin(struct snd_soc_dapm_context
*dapm
,
2149 struct snd_soc_dapm_widget
*w
;
2151 list_for_each_entry(w
, &dapm
->widgets
, list
) {
2152 if (!strcmp(w
->name
, pin
)) {
2153 dev_dbg(w
->dapm
->dev
,
2154 "dapm: force enable pin %s\n", pin
);
2161 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
2164 EXPORT_SYMBOL_GPL(snd_soc_dapm_force_enable_pin
);
2167 * snd_soc_dapm_disable_pin - disable pin.
2168 * @dapm: DAPM context
2171 * Disables input/output pin and its parents or children widgets.
2172 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2173 * do any widget power switching.
2175 int snd_soc_dapm_disable_pin(struct snd_soc_dapm_context
*dapm
,
2178 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
2180 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
2183 * snd_soc_dapm_nc_pin - permanently disable pin.
2184 * @dapm: DAPM context
2187 * Marks the specified pin as being not connected, disabling it along
2188 * any parent or child widgets. At present this is identical to
2189 * snd_soc_dapm_disable_pin() but in future it will be extended to do
2190 * additional things such as disabling controls which only affect
2191 * paths through the pin.
2193 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
2194 * do any widget power switching.
2196 int snd_soc_dapm_nc_pin(struct snd_soc_dapm_context
*dapm
, const char *pin
)
2198 return snd_soc_dapm_set_pin(dapm
, pin
, 0);
2200 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin
);
2203 * snd_soc_dapm_get_pin_status - get audio pin status
2204 * @dapm: DAPM context
2205 * @pin: audio signal pin endpoint (or start point)
2207 * Get audio pin status - connected or disconnected.
2209 * Returns 1 for connected otherwise 0.
2211 int snd_soc_dapm_get_pin_status(struct snd_soc_dapm_context
*dapm
,
2214 struct snd_soc_dapm_widget
*w
;
2216 list_for_each_entry(w
, &dapm
->widgets
, list
) {
2217 if (!strcmp(w
->name
, pin
))
2218 return w
->connected
;
2223 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
2226 * snd_soc_dapm_ignore_suspend - ignore suspend status for DAPM endpoint
2227 * @dapm: DAPM context
2228 * @pin: audio signal pin endpoint (or start point)
2230 * Mark the given endpoint or pin as ignoring suspend. When the
2231 * system is disabled a path between two endpoints flagged as ignoring
2232 * suspend will not be disabled. The path must already be enabled via
2233 * normal means at suspend time, it will not be turned on if it was not
2236 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context
*dapm
,
2239 struct snd_soc_dapm_widget
*w
;
2241 list_for_each_entry(w
, &dapm
->widgets
, list
) {
2242 if (!strcmp(w
->name
, pin
)) {
2243 w
->ignore_suspend
= 1;
2248 dev_err(dapm
->dev
, "dapm: unknown pin %s\n", pin
);
2251 EXPORT_SYMBOL_GPL(snd_soc_dapm_ignore_suspend
);
2254 * snd_soc_dapm_free - free dapm resources
2257 * Free all dapm widgets and resources.
2259 void snd_soc_dapm_free(struct snd_soc_dapm_context
*dapm
)
2261 snd_soc_dapm_sys_remove(dapm
->dev
);
2262 dapm_free_widgets(dapm
);
2264 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
2266 static void soc_dapm_shutdown_codec(struct snd_soc_dapm_context
*dapm
)
2268 struct snd_soc_dapm_widget
*w
;
2269 LIST_HEAD(down_list
);
2272 list_for_each_entry(w
, &dapm
->widgets
, list
) {
2274 dapm_seq_insert(w
, &down_list
, dapm_down_seq
);
2280 /* If there were no widgets to power down we're already in
2284 snd_soc_dapm_set_bias_level(NULL
, dapm
, SND_SOC_BIAS_PREPARE
);
2285 dapm_seq_run(dapm
, &down_list
, 0, dapm_down_seq
);
2286 snd_soc_dapm_set_bias_level(NULL
, dapm
, SND_SOC_BIAS_STANDBY
);
2291 * snd_soc_dapm_shutdown - callback for system shutdown
2293 void snd_soc_dapm_shutdown(struct snd_soc_card
*card
)
2295 struct snd_soc_codec
*codec
;
2297 list_for_each_entry(codec
, &card
->codec_dev_list
, list
) {
2298 soc_dapm_shutdown_codec(&codec
->dapm
);
2299 snd_soc_dapm_set_bias_level(card
, &codec
->dapm
, SND_SOC_BIAS_OFF
);
2303 /* Module information */
2304 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
2305 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
2306 MODULE_LICENSE("GPL");