2 * soc-dapm.c -- ALSA SoC Dynamic Audio Power Management
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 * o Changes power status of internal codec blocks depending on the
14 * dynamic configuration of codec internal audio paths and active
16 * o Platform power domain - can support external components i.e. amps and
17 * mic/meadphone insertion events.
18 * o Automatic Mic Bias support
19 * o Jack insertion power event initiation - e.g. hp insertion will enable
21 * o Delayed powerdown of audio susbsystem to reduce pops between a quick
25 * o DAPM power change sequencing - allow for configurable per
27 * o Support for analogue bias optimisation.
28 * o Support for reduced codec oversampling rates.
29 * o Support for reduced codec bias currents.
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/init.h>
35 #include <linux/delay.h>
37 #include <linux/bitops.h>
38 #include <linux/platform_device.h>
39 #include <linux/jiffies.h>
40 #include <sound/core.h>
41 #include <sound/pcm.h>
42 #include <sound/pcm_params.h>
43 #include <sound/soc-dapm.h>
44 #include <sound/initval.h>
48 #define dump_dapm(codec, action) dbg_dump_dapm(codec, action)
50 #define dump_dapm(codec, action)
53 /* dapm power sequences - make this per codec in the future */
54 static int dapm_up_seq
[] = {
55 [snd_soc_dapm_pre
] = 0,
56 [snd_soc_dapm_supply
] = 1,
57 [snd_soc_dapm_micbias
] = 2,
58 [snd_soc_dapm_mic
] = 3,
59 [snd_soc_dapm_mux
] = 4,
60 [snd_soc_dapm_value_mux
] = 4,
61 [snd_soc_dapm_dac
] = 5,
62 [snd_soc_dapm_mixer
] = 6,
63 [snd_soc_dapm_mixer_named_ctl
] = 6,
64 [snd_soc_dapm_pga
] = 7,
65 [snd_soc_dapm_adc
] = 8,
66 [snd_soc_dapm_hp
] = 9,
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
] = 3,
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_supply
] = 10,
85 [snd_soc_dapm_post
] = 11,
88 static void pop_wait(u32 pop_time
)
91 schedule_timeout_uninterruptible(msecs_to_jiffies(pop_time
));
94 static void pop_dbg(u32 pop_time
, const char *fmt
, ...)
108 /* create a new dapm widget */
109 static inline struct snd_soc_dapm_widget
*dapm_cnew_widget(
110 const struct snd_soc_dapm_widget
*_widget
)
112 return kmemdup(_widget
, sizeof(*_widget
), GFP_KERNEL
);
116 * snd_soc_dapm_set_bias_level - set the bias level for the system
117 * @socdev: audio device
118 * @level: level to configure
120 * Configure the bias (power) levels for the SoC audio device.
122 * Returns 0 for success else error.
124 static int snd_soc_dapm_set_bias_level(struct snd_soc_device
*socdev
,
125 enum snd_soc_bias_level level
)
127 struct snd_soc_card
*card
= socdev
->card
;
128 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
132 case SND_SOC_BIAS_ON
:
133 dev_dbg(socdev
->dev
, "Setting full bias\n");
135 case SND_SOC_BIAS_PREPARE
:
136 dev_dbg(socdev
->dev
, "Setting bias prepare\n");
138 case SND_SOC_BIAS_STANDBY
:
139 dev_dbg(socdev
->dev
, "Setting standby bias\n");
141 case SND_SOC_BIAS_OFF
:
142 dev_dbg(socdev
->dev
, "Setting bias off\n");
145 dev_err(socdev
->dev
, "Setting invalid bias %d\n", level
);
149 if (card
->set_bias_level
)
150 ret
= card
->set_bias_level(card
, level
);
151 if (ret
== 0 && codec
->set_bias_level
)
152 ret
= codec
->set_bias_level(codec
, level
);
157 /* set up initial codec paths */
158 static void dapm_set_path_status(struct snd_soc_dapm_widget
*w
,
159 struct snd_soc_dapm_path
*p
, int i
)
162 case snd_soc_dapm_switch
:
163 case snd_soc_dapm_mixer
:
164 case snd_soc_dapm_mixer_named_ctl
: {
166 struct soc_mixer_control
*mc
= (struct soc_mixer_control
*)
167 w
->kcontrols
[i
].private_value
;
168 unsigned int reg
= mc
->reg
;
169 unsigned int shift
= mc
->shift
;
171 unsigned int mask
= (1 << fls(max
)) - 1;
172 unsigned int invert
= mc
->invert
;
174 val
= snd_soc_read(w
->codec
, reg
);
175 val
= (val
>> shift
) & mask
;
177 if ((invert
&& !val
) || (!invert
&& val
))
183 case snd_soc_dapm_mux
: {
184 struct soc_enum
*e
= (struct soc_enum
*)w
->kcontrols
[i
].private_value
;
185 int val
, item
, bitmask
;
187 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
189 val
= snd_soc_read(w
->codec
, e
->reg
);
190 item
= (val
>> e
->shift_l
) & (bitmask
- 1);
193 for (i
= 0; i
< e
->max
; i
++) {
194 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
199 case snd_soc_dapm_value_mux
: {
200 struct soc_enum
*e
= (struct soc_enum
*)
201 w
->kcontrols
[i
].private_value
;
204 val
= snd_soc_read(w
->codec
, e
->reg
);
205 val
= (val
>> e
->shift_l
) & e
->mask
;
206 for (item
= 0; item
< e
->max
; item
++) {
207 if (val
== e
->values
[item
])
212 for (i
= 0; i
< e
->max
; i
++) {
213 if (!(strcmp(p
->name
, e
->texts
[i
])) && item
== i
)
218 /* does not effect routing - always connected */
219 case snd_soc_dapm_pga
:
220 case snd_soc_dapm_output
:
221 case snd_soc_dapm_adc
:
222 case snd_soc_dapm_input
:
223 case snd_soc_dapm_dac
:
224 case snd_soc_dapm_micbias
:
225 case snd_soc_dapm_vmid
:
226 case snd_soc_dapm_supply
:
229 /* does effect routing - dynamically connected */
230 case snd_soc_dapm_hp
:
231 case snd_soc_dapm_mic
:
232 case snd_soc_dapm_spk
:
233 case snd_soc_dapm_line
:
234 case snd_soc_dapm_pre
:
235 case snd_soc_dapm_post
:
241 /* connect mux widget to its interconnecting audio paths */
242 static int dapm_connect_mux(struct snd_soc_codec
*codec
,
243 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
244 struct snd_soc_dapm_path
*path
, const char *control_name
,
245 const struct snd_kcontrol_new
*kcontrol
)
247 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
250 for (i
= 0; i
< e
->max
; i
++) {
251 if (!(strcmp(control_name
, e
->texts
[i
]))) {
252 list_add(&path
->list
, &codec
->dapm_paths
);
253 list_add(&path
->list_sink
, &dest
->sources
);
254 list_add(&path
->list_source
, &src
->sinks
);
255 path
->name
= (char*)e
->texts
[i
];
256 dapm_set_path_status(dest
, path
, 0);
264 /* connect mixer widget to its interconnecting audio paths */
265 static int dapm_connect_mixer(struct snd_soc_codec
*codec
,
266 struct snd_soc_dapm_widget
*src
, struct snd_soc_dapm_widget
*dest
,
267 struct snd_soc_dapm_path
*path
, const char *control_name
)
271 /* search for mixer kcontrol */
272 for (i
= 0; i
< dest
->num_kcontrols
; i
++) {
273 if (!strcmp(control_name
, dest
->kcontrols
[i
].name
)) {
274 list_add(&path
->list
, &codec
->dapm_paths
);
275 list_add(&path
->list_sink
, &dest
->sources
);
276 list_add(&path
->list_source
, &src
->sinks
);
277 path
->name
= dest
->kcontrols
[i
].name
;
278 dapm_set_path_status(dest
, path
, i
);
285 /* update dapm codec register bits */
286 static int dapm_update_bits(struct snd_soc_dapm_widget
*widget
)
289 unsigned short old
, new;
290 struct snd_soc_codec
*codec
= widget
->codec
;
292 /* check for valid widgets */
293 if (widget
->reg
< 0 || widget
->id
== snd_soc_dapm_input
||
294 widget
->id
== snd_soc_dapm_output
||
295 widget
->id
== snd_soc_dapm_hp
||
296 widget
->id
== snd_soc_dapm_mic
||
297 widget
->id
== snd_soc_dapm_line
||
298 widget
->id
== snd_soc_dapm_spk
)
301 power
= widget
->power
;
303 power
= (power
? 0:1);
305 old
= snd_soc_read(codec
, widget
->reg
);
306 new = (old
& ~(0x1 << widget
->shift
)) | (power
<< widget
->shift
);
310 pop_dbg(codec
->pop_time
, "pop test %s : %s in %d ms\n",
311 widget
->name
, widget
->power
? "on" : "off",
313 snd_soc_write(codec
, widget
->reg
, new);
314 pop_wait(codec
->pop_time
);
316 pr_debug("reg %x old %x new %x change %d\n", widget
->reg
,
321 /* ramps the volume up or down to minimise pops before or after a
322 * DAPM power event */
323 static int dapm_set_pga(struct snd_soc_dapm_widget
*widget
, int power
)
325 const struct snd_kcontrol_new
*k
= widget
->kcontrols
;
327 if (widget
->muted
&& !power
)
329 if (!widget
->muted
&& power
)
332 if (widget
->num_kcontrols
&& k
) {
333 struct soc_mixer_control
*mc
=
334 (struct soc_mixer_control
*)k
->private_value
;
335 unsigned int reg
= mc
->reg
;
336 unsigned int shift
= mc
->shift
;
338 unsigned int mask
= (1 << fls(max
)) - 1;
339 unsigned int invert
= mc
->invert
;
343 /* power up has happended, increase volume to last level */
345 for (i
= max
; i
> widget
->saved_value
; i
--)
346 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
348 for (i
= 0; i
< widget
->saved_value
; i
++)
349 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
353 /* power down is about to occur, decrease volume to mute */
354 int val
= snd_soc_read(widget
->codec
, reg
);
355 int i
= widget
->saved_value
= (val
>> shift
) & mask
;
357 for (; i
< mask
; i
++)
358 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
361 snd_soc_update_bits(widget
->codec
, reg
, mask
, i
);
369 /* create new dapm mixer control */
370 static int dapm_new_mixer(struct snd_soc_codec
*codec
,
371 struct snd_soc_dapm_widget
*w
)
375 struct snd_soc_dapm_path
*path
;
378 for (i
= 0; i
< w
->num_kcontrols
; i
++) {
381 list_for_each_entry(path
, &w
->sources
, list_sink
) {
383 /* mixer/mux paths name must match control name */
384 if (path
->name
!= (char*)w
->kcontrols
[i
].name
)
387 /* add dapm control with long name.
388 * for dapm_mixer this is the concatenation of the
389 * mixer and kcontrol name.
390 * for dapm_mixer_named_ctl this is simply the
393 name_len
= strlen(w
->kcontrols
[i
].name
) + 1;
394 if (w
->id
!= snd_soc_dapm_mixer_named_ctl
)
395 name_len
+= 1 + strlen(w
->name
);
397 path
->long_name
= kmalloc(name_len
, GFP_KERNEL
);
399 if (path
->long_name
== NULL
)
404 snprintf(path
->long_name
, name_len
, "%s %s",
405 w
->name
, w
->kcontrols
[i
].name
);
407 case snd_soc_dapm_mixer_named_ctl
:
408 snprintf(path
->long_name
, name_len
, "%s",
409 w
->kcontrols
[i
].name
);
413 path
->long_name
[name_len
- 1] = '\0';
415 path
->kcontrol
= snd_soc_cnew(&w
->kcontrols
[i
], w
,
417 ret
= snd_ctl_add(codec
->card
, path
->kcontrol
);
419 printk(KERN_ERR
"asoc: failed to add dapm kcontrol %s: %d\n",
422 kfree(path
->long_name
);
423 path
->long_name
= NULL
;
431 /* create new dapm mux control */
432 static int dapm_new_mux(struct snd_soc_codec
*codec
,
433 struct snd_soc_dapm_widget
*w
)
435 struct snd_soc_dapm_path
*path
= NULL
;
436 struct snd_kcontrol
*kcontrol
;
439 if (!w
->num_kcontrols
) {
440 printk(KERN_ERR
"asoc: mux %s has no controls\n", w
->name
);
444 kcontrol
= snd_soc_cnew(&w
->kcontrols
[0], w
, w
->name
);
445 ret
= snd_ctl_add(codec
->card
, kcontrol
);
449 list_for_each_entry(path
, &w
->sources
, list_sink
)
450 path
->kcontrol
= kcontrol
;
455 printk(KERN_ERR
"asoc: failed to add kcontrol %s\n", w
->name
);
459 /* create new dapm volume control */
460 static int dapm_new_pga(struct snd_soc_codec
*codec
,
461 struct snd_soc_dapm_widget
*w
)
463 struct snd_kcontrol
*kcontrol
;
466 if (!w
->num_kcontrols
)
469 kcontrol
= snd_soc_cnew(&w
->kcontrols
[0], w
, w
->name
);
470 ret
= snd_ctl_add(codec
->card
, kcontrol
);
472 printk(KERN_ERR
"asoc: failed to add kcontrol %s\n", w
->name
);
479 /* reset 'walked' bit for each dapm path */
480 static inline void dapm_clear_walk(struct snd_soc_codec
*codec
)
482 struct snd_soc_dapm_path
*p
;
484 list_for_each_entry(p
, &codec
->dapm_paths
, list
)
489 * Recursively check for a completed path to an active or physically connected
490 * output widget. Returns number of complete paths.
492 static int is_connected_output_ep(struct snd_soc_dapm_widget
*widget
)
494 struct snd_soc_dapm_path
*path
;
497 if (widget
->id
== snd_soc_dapm_supply
)
500 if (widget
->id
== snd_soc_dapm_adc
&& widget
->active
)
503 if (widget
->connected
) {
504 /* connected pin ? */
505 if (widget
->id
== snd_soc_dapm_output
&& !widget
->ext
)
508 /* connected jack or spk ? */
509 if (widget
->id
== snd_soc_dapm_hp
|| widget
->id
== snd_soc_dapm_spk
||
510 widget
->id
== snd_soc_dapm_line
)
514 list_for_each_entry(path
, &widget
->sinks
, list_source
) {
518 if (path
->sink
&& path
->connect
) {
520 con
+= is_connected_output_ep(path
->sink
);
528 * Recursively check for a completed path to an active or physically connected
529 * input widget. Returns number of complete paths.
531 static int is_connected_input_ep(struct snd_soc_dapm_widget
*widget
)
533 struct snd_soc_dapm_path
*path
;
536 if (widget
->id
== snd_soc_dapm_supply
)
539 /* active stream ? */
540 if (widget
->id
== snd_soc_dapm_dac
&& widget
->active
)
543 if (widget
->connected
) {
544 /* connected pin ? */
545 if (widget
->id
== snd_soc_dapm_input
&& !widget
->ext
)
548 /* connected VMID/Bias for lower pops */
549 if (widget
->id
== snd_soc_dapm_vmid
)
552 /* connected jack ? */
553 if (widget
->id
== snd_soc_dapm_mic
|| widget
->id
== snd_soc_dapm_line
)
557 list_for_each_entry(path
, &widget
->sources
, list_sink
) {
561 if (path
->source
&& path
->connect
) {
563 con
+= is_connected_input_ep(path
->source
);
571 * Handler for generic register modifier widget.
573 int dapm_reg_event(struct snd_soc_dapm_widget
*w
,
574 struct snd_kcontrol
*kcontrol
, int event
)
578 if (SND_SOC_DAPM_EVENT_ON(event
))
583 snd_soc_update_bits(w
->codec
, -(w
->reg
+ 1),
584 w
->mask
<< w
->shift
, val
<< w
->shift
);
588 EXPORT_SYMBOL_GPL(dapm_reg_event
);
590 /* Standard power change method, used to apply power changes to most
593 static int dapm_generic_apply_power(struct snd_soc_dapm_widget
*w
)
597 /* call any power change event handlers */
599 pr_debug("power %s event for %s flags %x\n",
600 w
->power
? "on" : "off",
601 w
->name
, w
->event_flags
);
603 /* power up pre event */
604 if (w
->power
&& w
->event
&&
605 (w
->event_flags
& SND_SOC_DAPM_PRE_PMU
)) {
606 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMU
);
611 /* power down pre event */
612 if (!w
->power
&& w
->event
&&
613 (w
->event_flags
& SND_SOC_DAPM_PRE_PMD
)) {
614 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_PRE_PMD
);
619 /* Lower PGA volume to reduce pops */
620 if (w
->id
== snd_soc_dapm_pga
&& !w
->power
)
621 dapm_set_pga(w
, w
->power
);
625 /* Raise PGA volume to reduce pops */
626 if (w
->id
== snd_soc_dapm_pga
&& w
->power
)
627 dapm_set_pga(w
, w
->power
);
629 /* power up post event */
630 if (w
->power
&& w
->event
&&
631 (w
->event_flags
& SND_SOC_DAPM_POST_PMU
)) {
633 NULL
, SND_SOC_DAPM_POST_PMU
);
638 /* power down post event */
639 if (!w
->power
&& w
->event
&&
640 (w
->event_flags
& SND_SOC_DAPM_POST_PMD
)) {
641 ret
= w
->event(w
, NULL
, SND_SOC_DAPM_POST_PMD
);
649 /* Generic check to see if a widget should be powered.
651 static int dapm_generic_check_power(struct snd_soc_dapm_widget
*w
)
655 in
= is_connected_input_ep(w
);
656 dapm_clear_walk(w
->codec
);
657 out
= is_connected_output_ep(w
);
658 dapm_clear_walk(w
->codec
);
659 return out
!= 0 && in
!= 0;
662 /* Check to see if an ADC has power */
663 static int dapm_adc_check_power(struct snd_soc_dapm_widget
*w
)
668 in
= is_connected_input_ep(w
);
669 dapm_clear_walk(w
->codec
);
672 return dapm_generic_check_power(w
);
676 /* Check to see if a DAC has power */
677 static int dapm_dac_check_power(struct snd_soc_dapm_widget
*w
)
682 out
= is_connected_output_ep(w
);
683 dapm_clear_walk(w
->codec
);
686 return dapm_generic_check_power(w
);
690 /* Check to see if a power supply is needed */
691 static int dapm_supply_check_power(struct snd_soc_dapm_widget
*w
)
693 struct snd_soc_dapm_path
*path
;
696 /* Check if one of our outputs is connected */
697 list_for_each_entry(path
, &w
->sinks
, list_source
) {
698 if (path
->sink
&& path
->sink
->power_check
&&
699 path
->sink
->power_check(path
->sink
)) {
705 dapm_clear_walk(w
->codec
);
710 static int dapm_seq_compare(struct snd_soc_dapm_widget
*a
,
711 struct snd_soc_dapm_widget
*b
,
714 if (sort
[a
->id
] != sort
[b
->id
])
715 return sort
[a
->id
] - sort
[b
->id
];
716 if (a
->reg
!= b
->reg
)
717 return a
->reg
- b
->reg
;
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 /* Apply the coalesced changes from a DAPM sequence */
739 static void dapm_seq_run_coalesced(struct snd_soc_codec
*codec
,
740 struct list_head
*pending
)
742 struct snd_soc_dapm_widget
*w
;
744 unsigned int value
= 0;
745 unsigned int mask
= 0;
746 unsigned int cur_mask
;
748 reg
= list_first_entry(pending
, struct snd_soc_dapm_widget
,
751 list_for_each_entry(w
, pending
, power_list
) {
752 cur_mask
= 1 << w
->shift
;
753 BUG_ON(reg
!= w
->reg
);
764 pop_dbg(codec
->pop_time
,
765 "pop test : Queue %s: reg=0x%x, 0x%x/0x%x\n",
766 w
->name
, reg
, value
, mask
);
769 pop_dbg(codec
->pop_time
,
770 "pop test : Applying 0x%x/0x%x to %x in %dms\n",
771 value
, mask
, reg
, codec
->pop_time
);
772 pop_wait(codec
->pop_time
);
773 snd_soc_update_bits(codec
, reg
, mask
, value
);
776 /* Apply a DAPM power sequence.
778 * We walk over a pre-sorted list of widgets to apply power to. In
779 * order to minimise the number of writes to the device required
780 * multiple widgets will be updated in a single write where possible.
781 * Currently anything that requires more than a single write is not
784 static void dapm_seq_run(struct snd_soc_codec
*codec
, struct list_head
*list
,
785 int event
, int sort
[])
787 struct snd_soc_dapm_widget
*w
, *n
;
790 int cur_reg
= SND_SOC_NOPM
;
793 list_for_each_entry_safe(w
, n
, list
, power_list
) {
796 /* Do we need to apply any queued changes? */
797 if (sort
[w
->id
] != cur_sort
|| w
->reg
!= cur_reg
) {
798 if (!list_empty(&pending
))
799 dapm_seq_run_coalesced(codec
, &pending
);
801 INIT_LIST_HEAD(&pending
);
803 cur_reg
= SND_SOC_NOPM
;
807 case snd_soc_dapm_pre
:
809 list_for_each_entry_safe_continue(w
, n
, list
,
812 if (event
== SND_SOC_DAPM_STREAM_START
)
814 NULL
, SND_SOC_DAPM_PRE_PMU
);
815 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
817 NULL
, SND_SOC_DAPM_PRE_PMD
);
820 case snd_soc_dapm_post
:
822 list_for_each_entry_safe_continue(w
, n
, list
,
825 if (event
== SND_SOC_DAPM_STREAM_START
)
827 NULL
, SND_SOC_DAPM_POST_PMU
);
828 else if (event
== SND_SOC_DAPM_STREAM_STOP
)
830 NULL
, SND_SOC_DAPM_POST_PMD
);
833 case snd_soc_dapm_input
:
834 case snd_soc_dapm_output
:
835 case snd_soc_dapm_hp
:
836 case snd_soc_dapm_mic
:
837 case snd_soc_dapm_line
:
838 case snd_soc_dapm_spk
:
839 /* No register support currently */
840 case snd_soc_dapm_pga
:
841 /* Don't coalsece these yet due to gain ramping */
842 ret
= dapm_generic_apply_power(w
);
846 /* If there's an event or an invalid register
847 * then run immediately, otherwise store the
848 * updates so that we can coalesce. */
849 if (w
->reg
>= 0 && !w
->event
) {
850 cur_sort
= sort
[w
->id
];
852 list_move(&w
->power_list
, &pending
);
854 ret
= dapm_generic_apply_power(w
);
859 pr_err("Failed to apply widget power: %d\n",
863 if (!list_empty(&pending
))
864 dapm_seq_run_coalesced(codec
, &pending
);
868 * Scan each dapm widget for complete audio path.
869 * A complete path is a route that has valid endpoints i.e.:-
871 * o DAC to output pin.
872 * o Input Pin to ADC.
873 * o Input pin to Output pin (bypass, sidetone)
874 * o DAC to ADC (loopback).
876 static int dapm_power_widgets(struct snd_soc_codec
*codec
, int event
)
878 struct snd_soc_device
*socdev
= codec
->socdev
;
879 struct snd_soc_dapm_widget
*w
;
884 INIT_LIST_HEAD(&codec
->up_list
);
885 INIT_LIST_HEAD(&codec
->down_list
);
887 /* Check which widgets we need to power and store them in
888 * lists indicating if they should be powered up or down.
890 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
892 case snd_soc_dapm_pre
:
893 dapm_seq_insert(w
, &codec
->down_list
, dapm_down_seq
);
895 case snd_soc_dapm_post
:
896 dapm_seq_insert(w
, &codec
->up_list
, dapm_up_seq
);
903 power
= w
->power_check(w
);
907 if (w
->power
== power
)
911 dapm_seq_insert(w
, &codec
->up_list
,
914 dapm_seq_insert(w
, &codec
->down_list
,
922 /* If we're changing to all on or all off then prepare */
923 if ((sys_power
&& codec
->bias_level
== SND_SOC_BIAS_STANDBY
) ||
924 (!sys_power
&& codec
->bias_level
== SND_SOC_BIAS_ON
)) {
925 ret
= snd_soc_dapm_set_bias_level(socdev
,
926 SND_SOC_BIAS_PREPARE
);
928 pr_err("Failed to prepare bias: %d\n", ret
);
931 /* Power down widgets first; try to avoid amplifying pops. */
932 dapm_seq_run(codec
, &codec
->down_list
, event
, dapm_down_seq
);
935 dapm_seq_run(codec
, &codec
->up_list
, event
, dapm_up_seq
);
937 /* If we just powered the last thing off drop to standby bias */
938 if (codec
->bias_level
== SND_SOC_BIAS_PREPARE
&& !sys_power
) {
939 ret
= snd_soc_dapm_set_bias_level(socdev
,
940 SND_SOC_BIAS_STANDBY
);
942 pr_err("Failed to apply standby bias: %d\n", ret
);
945 /* If we just powered up then move to active bias */
946 if (codec
->bias_level
== SND_SOC_BIAS_PREPARE
&& sys_power
) {
947 ret
= snd_soc_dapm_set_bias_level(socdev
,
950 pr_err("Failed to apply active bias: %d\n", ret
);
957 static void dbg_dump_dapm(struct snd_soc_codec
* codec
, const char *action
)
959 struct snd_soc_dapm_widget
*w
;
960 struct snd_soc_dapm_path
*p
= NULL
;
963 printk("DAPM %s %s\n", codec
->name
, action
);
965 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
967 /* only display widgets that effect routing */
969 case snd_soc_dapm_pre
:
970 case snd_soc_dapm_post
:
971 case snd_soc_dapm_vmid
:
973 case snd_soc_dapm_mux
:
974 case snd_soc_dapm_value_mux
:
975 case snd_soc_dapm_output
:
976 case snd_soc_dapm_input
:
977 case snd_soc_dapm_switch
:
978 case snd_soc_dapm_hp
:
979 case snd_soc_dapm_mic
:
980 case snd_soc_dapm_spk
:
981 case snd_soc_dapm_line
:
982 case snd_soc_dapm_micbias
:
983 case snd_soc_dapm_dac
:
984 case snd_soc_dapm_adc
:
985 case snd_soc_dapm_pga
:
986 case snd_soc_dapm_mixer
:
987 case snd_soc_dapm_mixer_named_ctl
:
988 case snd_soc_dapm_supply
:
990 in
= is_connected_input_ep(w
);
991 dapm_clear_walk(w
->codec
);
992 out
= is_connected_output_ep(w
);
993 dapm_clear_walk(w
->codec
);
994 printk("%s: %s in %d out %d\n", w
->name
,
995 w
->power
? "On":"Off",in
, out
);
997 list_for_each_entry(p
, &w
->sources
, list_sink
) {
999 printk(" in %s %s\n", p
->name
? p
->name
: "static",
1002 list_for_each_entry(p
, &w
->sinks
, list_source
) {
1004 printk(" out %s %s\n", p
->name
? p
->name
: "static",
1014 /* test and update the power status of a mux widget */
1015 static int dapm_mux_update_power(struct snd_soc_dapm_widget
*widget
,
1016 struct snd_kcontrol
*kcontrol
, int mask
,
1017 int mux
, int val
, struct soc_enum
*e
)
1019 struct snd_soc_dapm_path
*path
;
1022 if (widget
->id
!= snd_soc_dapm_mux
&&
1023 widget
->id
!= snd_soc_dapm_value_mux
)
1026 if (!snd_soc_test_bits(widget
->codec
, e
->reg
, mask
, val
))
1029 /* find dapm widget path assoc with kcontrol */
1030 list_for_each_entry(path
, &widget
->codec
->dapm_paths
, list
) {
1031 if (path
->kcontrol
!= kcontrol
)
1034 if (!path
->name
|| !e
->texts
[mux
])
1038 /* we now need to match the string in the enum to the path */
1039 if (!(strcmp(path
->name
, e
->texts
[mux
])))
1040 path
->connect
= 1; /* new connection */
1042 path
->connect
= 0; /* old connection must be powered down */
1046 dapm_power_widgets(widget
->codec
, SND_SOC_DAPM_STREAM_NOP
);
1047 dump_dapm(widget
->codec
, "mux power update");
1053 /* test and update the power status of a mixer or switch widget */
1054 static int dapm_mixer_update_power(struct snd_soc_dapm_widget
*widget
,
1055 struct snd_kcontrol
*kcontrol
, int reg
,
1056 int val_mask
, int val
, int invert
)
1058 struct snd_soc_dapm_path
*path
;
1061 if (widget
->id
!= snd_soc_dapm_mixer
&&
1062 widget
->id
!= snd_soc_dapm_mixer_named_ctl
&&
1063 widget
->id
!= snd_soc_dapm_switch
)
1066 if (!snd_soc_test_bits(widget
->codec
, reg
, val_mask
, val
))
1069 /* find dapm widget path assoc with kcontrol */
1070 list_for_each_entry(path
, &widget
->codec
->dapm_paths
, list
) {
1071 if (path
->kcontrol
!= kcontrol
)
1074 /* found, now check type */
1077 /* new connection */
1078 path
->connect
= invert
? 0:1;
1080 /* old connection must be powered down */
1081 path
->connect
= invert
? 1:0;
1086 dapm_power_widgets(widget
->codec
, SND_SOC_DAPM_STREAM_NOP
);
1087 dump_dapm(widget
->codec
, "mixer power update");
1093 /* show dapm widget status in sys fs */
1094 static ssize_t
dapm_widget_show(struct device
*dev
,
1095 struct device_attribute
*attr
, char *buf
)
1097 struct snd_soc_device
*devdata
= dev_get_drvdata(dev
);
1098 struct snd_soc_codec
*codec
= devdata
->card
->codec
;
1099 struct snd_soc_dapm_widget
*w
;
1101 char *state
= "not set";
1103 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
1105 /* only display widgets that burnm power */
1107 case snd_soc_dapm_hp
:
1108 case snd_soc_dapm_mic
:
1109 case snd_soc_dapm_spk
:
1110 case snd_soc_dapm_line
:
1111 case snd_soc_dapm_micbias
:
1112 case snd_soc_dapm_dac
:
1113 case snd_soc_dapm_adc
:
1114 case snd_soc_dapm_pga
:
1115 case snd_soc_dapm_mixer
:
1116 case snd_soc_dapm_mixer_named_ctl
:
1117 case snd_soc_dapm_supply
:
1119 count
+= sprintf(buf
+ count
, "%s: %s\n",
1120 w
->name
, w
->power
? "On":"Off");
1127 switch (codec
->bias_level
) {
1128 case SND_SOC_BIAS_ON
:
1131 case SND_SOC_BIAS_PREPARE
:
1134 case SND_SOC_BIAS_STANDBY
:
1137 case SND_SOC_BIAS_OFF
:
1141 count
+= sprintf(buf
+ count
, "PM State: %s\n", state
);
1146 static DEVICE_ATTR(dapm_widget
, 0444, dapm_widget_show
, NULL
);
1148 int snd_soc_dapm_sys_add(struct device
*dev
)
1150 return device_create_file(dev
, &dev_attr_dapm_widget
);
1153 static void snd_soc_dapm_sys_remove(struct device
*dev
)
1155 device_remove_file(dev
, &dev_attr_dapm_widget
);
1158 /* free all dapm widgets and resources */
1159 static void dapm_free_widgets(struct snd_soc_codec
*codec
)
1161 struct snd_soc_dapm_widget
*w
, *next_w
;
1162 struct snd_soc_dapm_path
*p
, *next_p
;
1164 list_for_each_entry_safe(w
, next_w
, &codec
->dapm_widgets
, list
) {
1169 list_for_each_entry_safe(p
, next_p
, &codec
->dapm_paths
, list
) {
1171 kfree(p
->long_name
);
1176 static int snd_soc_dapm_set_pin(struct snd_soc_codec
*codec
,
1177 const char *pin
, int status
)
1179 struct snd_soc_dapm_widget
*w
;
1181 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
1182 if (!strcmp(w
->name
, pin
)) {
1183 pr_debug("dapm: %s: pin %s\n", codec
->name
, pin
);
1184 w
->connected
= status
;
1189 pr_err("dapm: %s: configuring unknown pin %s\n", codec
->name
, pin
);
1194 * snd_soc_dapm_sync - scan and power dapm paths
1195 * @codec: audio codec
1197 * Walks all dapm audio paths and powers widgets according to their
1198 * stream or path usage.
1200 * Returns 0 for success.
1202 int snd_soc_dapm_sync(struct snd_soc_codec
*codec
)
1204 int ret
= dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
1205 dump_dapm(codec
, "sync");
1208 EXPORT_SYMBOL_GPL(snd_soc_dapm_sync
);
1210 static int snd_soc_dapm_add_route(struct snd_soc_codec
*codec
,
1211 const char *sink
, const char *control
, const char *source
)
1213 struct snd_soc_dapm_path
*path
;
1214 struct snd_soc_dapm_widget
*wsource
= NULL
, *wsink
= NULL
, *w
;
1217 /* find src and dest widgets */
1218 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
1220 if (!wsink
&& !(strcmp(w
->name
, sink
))) {
1224 if (!wsource
&& !(strcmp(w
->name
, source
))) {
1229 if (wsource
== NULL
|| wsink
== NULL
)
1232 path
= kzalloc(sizeof(struct snd_soc_dapm_path
), GFP_KERNEL
);
1236 path
->source
= wsource
;
1238 INIT_LIST_HEAD(&path
->list
);
1239 INIT_LIST_HEAD(&path
->list_source
);
1240 INIT_LIST_HEAD(&path
->list_sink
);
1242 /* check for external widgets */
1243 if (wsink
->id
== snd_soc_dapm_input
) {
1244 if (wsource
->id
== snd_soc_dapm_micbias
||
1245 wsource
->id
== snd_soc_dapm_mic
||
1246 wsink
->id
== snd_soc_dapm_line
||
1247 wsink
->id
== snd_soc_dapm_output
)
1250 if (wsource
->id
== snd_soc_dapm_output
) {
1251 if (wsink
->id
== snd_soc_dapm_spk
||
1252 wsink
->id
== snd_soc_dapm_hp
||
1253 wsink
->id
== snd_soc_dapm_line
||
1254 wsink
->id
== snd_soc_dapm_input
)
1258 /* connect static paths */
1259 if (control
== NULL
) {
1260 list_add(&path
->list
, &codec
->dapm_paths
);
1261 list_add(&path
->list_sink
, &wsink
->sources
);
1262 list_add(&path
->list_source
, &wsource
->sinks
);
1267 /* connect dynamic paths */
1269 case snd_soc_dapm_adc
:
1270 case snd_soc_dapm_dac
:
1271 case snd_soc_dapm_pga
:
1272 case snd_soc_dapm_input
:
1273 case snd_soc_dapm_output
:
1274 case snd_soc_dapm_micbias
:
1275 case snd_soc_dapm_vmid
:
1276 case snd_soc_dapm_pre
:
1277 case snd_soc_dapm_post
:
1278 case snd_soc_dapm_supply
:
1279 list_add(&path
->list
, &codec
->dapm_paths
);
1280 list_add(&path
->list_sink
, &wsink
->sources
);
1281 list_add(&path
->list_source
, &wsource
->sinks
);
1284 case snd_soc_dapm_mux
:
1285 case snd_soc_dapm_value_mux
:
1286 ret
= dapm_connect_mux(codec
, wsource
, wsink
, path
, control
,
1287 &wsink
->kcontrols
[0]);
1291 case snd_soc_dapm_switch
:
1292 case snd_soc_dapm_mixer
:
1293 case snd_soc_dapm_mixer_named_ctl
:
1294 ret
= dapm_connect_mixer(codec
, wsource
, wsink
, path
, control
);
1298 case snd_soc_dapm_hp
:
1299 case snd_soc_dapm_mic
:
1300 case snd_soc_dapm_line
:
1301 case snd_soc_dapm_spk
:
1302 list_add(&path
->list
, &codec
->dapm_paths
);
1303 list_add(&path
->list_sink
, &wsink
->sources
);
1304 list_add(&path
->list_source
, &wsource
->sinks
);
1311 printk(KERN_WARNING
"asoc: no dapm match for %s --> %s --> %s\n", source
,
1318 * snd_soc_dapm_add_routes - Add routes between DAPM widgets
1320 * @route: audio routes
1321 * @num: number of routes
1323 * Connects 2 dapm widgets together via a named audio path. The sink is
1324 * the widget receiving the audio signal, whilst the source is the sender
1325 * of the audio signal.
1327 * Returns 0 for success else error. On error all resources can be freed
1328 * with a call to snd_soc_card_free().
1330 int snd_soc_dapm_add_routes(struct snd_soc_codec
*codec
,
1331 const struct snd_soc_dapm_route
*route
, int num
)
1335 for (i
= 0; i
< num
; i
++) {
1336 ret
= snd_soc_dapm_add_route(codec
, route
->sink
,
1337 route
->control
, route
->source
);
1339 printk(KERN_ERR
"Failed to add route %s->%s\n",
1349 EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes
);
1352 * snd_soc_dapm_new_widgets - add new dapm widgets
1353 * @codec: audio codec
1355 * Checks the codec for any new dapm widgets and creates them if found.
1357 * Returns 0 for success.
1359 int snd_soc_dapm_new_widgets(struct snd_soc_codec
*codec
)
1361 struct snd_soc_dapm_widget
*w
;
1363 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1369 case snd_soc_dapm_switch
:
1370 case snd_soc_dapm_mixer
:
1371 case snd_soc_dapm_mixer_named_ctl
:
1372 w
->power_check
= dapm_generic_check_power
;
1373 dapm_new_mixer(codec
, w
);
1375 case snd_soc_dapm_mux
:
1376 case snd_soc_dapm_value_mux
:
1377 w
->power_check
= dapm_generic_check_power
;
1378 dapm_new_mux(codec
, w
);
1380 case snd_soc_dapm_adc
:
1381 w
->power_check
= dapm_adc_check_power
;
1383 case snd_soc_dapm_dac
:
1384 w
->power_check
= dapm_dac_check_power
;
1386 case snd_soc_dapm_pga
:
1387 w
->power_check
= dapm_generic_check_power
;
1388 dapm_new_pga(codec
, w
);
1390 case snd_soc_dapm_input
:
1391 case snd_soc_dapm_output
:
1392 case snd_soc_dapm_micbias
:
1393 case snd_soc_dapm_spk
:
1394 case snd_soc_dapm_hp
:
1395 case snd_soc_dapm_mic
:
1396 case snd_soc_dapm_line
:
1397 w
->power_check
= dapm_generic_check_power
;
1399 case snd_soc_dapm_supply
:
1400 w
->power_check
= dapm_supply_check_power
;
1401 case snd_soc_dapm_vmid
:
1402 case snd_soc_dapm_pre
:
1403 case snd_soc_dapm_post
:
1409 dapm_power_widgets(codec
, SND_SOC_DAPM_STREAM_NOP
);
1412 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_widgets
);
1415 * snd_soc_dapm_get_volsw - dapm mixer get callback
1416 * @kcontrol: mixer control
1417 * @ucontrol: control element information
1419 * Callback to get the value of a dapm mixer control.
1421 * Returns 0 for success.
1423 int snd_soc_dapm_get_volsw(struct snd_kcontrol
*kcontrol
,
1424 struct snd_ctl_elem_value
*ucontrol
)
1426 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1427 struct soc_mixer_control
*mc
=
1428 (struct soc_mixer_control
*)kcontrol
->private_value
;
1429 unsigned int reg
= mc
->reg
;
1430 unsigned int shift
= mc
->shift
;
1431 unsigned int rshift
= mc
->rshift
;
1433 unsigned int invert
= mc
->invert
;
1434 unsigned int mask
= (1 << fls(max
)) - 1;
1436 /* return the saved value if we are powered down */
1437 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1438 ucontrol
->value
.integer
.value
[0] = widget
->saved_value
;
1442 ucontrol
->value
.integer
.value
[0] =
1443 (snd_soc_read(widget
->codec
, reg
) >> shift
) & mask
;
1444 if (shift
!= rshift
)
1445 ucontrol
->value
.integer
.value
[1] =
1446 (snd_soc_read(widget
->codec
, reg
) >> rshift
) & mask
;
1448 ucontrol
->value
.integer
.value
[0] =
1449 max
- ucontrol
->value
.integer
.value
[0];
1450 if (shift
!= rshift
)
1451 ucontrol
->value
.integer
.value
[1] =
1452 max
- ucontrol
->value
.integer
.value
[1];
1457 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_volsw
);
1460 * snd_soc_dapm_put_volsw - dapm mixer set callback
1461 * @kcontrol: mixer control
1462 * @ucontrol: control element information
1464 * Callback to set the value of a dapm mixer control.
1466 * Returns 0 for success.
1468 int snd_soc_dapm_put_volsw(struct snd_kcontrol
*kcontrol
,
1469 struct snd_ctl_elem_value
*ucontrol
)
1471 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1472 struct soc_mixer_control
*mc
=
1473 (struct soc_mixer_control
*)kcontrol
->private_value
;
1474 unsigned int reg
= mc
->reg
;
1475 unsigned int shift
= mc
->shift
;
1476 unsigned int rshift
= mc
->rshift
;
1478 unsigned int mask
= (1 << fls(max
)) - 1;
1479 unsigned int invert
= mc
->invert
;
1480 unsigned short val
, val2
, val_mask
;
1483 val
= (ucontrol
->value
.integer
.value
[0] & mask
);
1487 val_mask
= mask
<< shift
;
1489 if (shift
!= rshift
) {
1490 val2
= (ucontrol
->value
.integer
.value
[1] & mask
);
1493 val_mask
|= mask
<< rshift
;
1494 val
|= val2
<< rshift
;
1497 mutex_lock(&widget
->codec
->mutex
);
1498 widget
->value
= val
;
1500 /* save volume value if the widget is powered down */
1501 if (widget
->id
== snd_soc_dapm_pga
&& !widget
->power
) {
1502 widget
->saved_value
= val
;
1503 mutex_unlock(&widget
->codec
->mutex
);
1507 dapm_mixer_update_power(widget
, kcontrol
, reg
, val_mask
, val
, invert
);
1508 if (widget
->event
) {
1509 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1510 ret
= widget
->event(widget
, kcontrol
,
1511 SND_SOC_DAPM_PRE_REG
);
1517 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1518 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1519 ret
= widget
->event(widget
, kcontrol
,
1520 SND_SOC_DAPM_POST_REG
);
1522 ret
= snd_soc_update_bits(widget
->codec
, reg
, val_mask
, val
);
1525 mutex_unlock(&widget
->codec
->mutex
);
1528 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_volsw
);
1531 * snd_soc_dapm_get_enum_double - dapm enumerated double mixer get callback
1532 * @kcontrol: mixer control
1533 * @ucontrol: control element information
1535 * Callback to get the value of a dapm enumerated double mixer control.
1537 * Returns 0 for success.
1539 int snd_soc_dapm_get_enum_double(struct snd_kcontrol
*kcontrol
,
1540 struct snd_ctl_elem_value
*ucontrol
)
1542 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1543 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1544 unsigned short val
, bitmask
;
1546 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1548 val
= snd_soc_read(widget
->codec
, e
->reg
);
1549 ucontrol
->value
.enumerated
.item
[0] = (val
>> e
->shift_l
) & (bitmask
- 1);
1550 if (e
->shift_l
!= e
->shift_r
)
1551 ucontrol
->value
.enumerated
.item
[1] =
1552 (val
>> e
->shift_r
) & (bitmask
- 1);
1556 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_enum_double
);
1559 * snd_soc_dapm_put_enum_double - dapm enumerated double mixer set callback
1560 * @kcontrol: mixer control
1561 * @ucontrol: control element information
1563 * Callback to set the value of a dapm enumerated double mixer control.
1565 * Returns 0 for success.
1567 int snd_soc_dapm_put_enum_double(struct snd_kcontrol
*kcontrol
,
1568 struct snd_ctl_elem_value
*ucontrol
)
1570 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1571 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1572 unsigned short val
, mux
;
1573 unsigned short mask
, bitmask
;
1576 for (bitmask
= 1; bitmask
< e
->max
; bitmask
<<= 1)
1578 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1580 mux
= ucontrol
->value
.enumerated
.item
[0];
1581 val
= mux
<< e
->shift_l
;
1582 mask
= (bitmask
- 1) << e
->shift_l
;
1583 if (e
->shift_l
!= e
->shift_r
) {
1584 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1586 val
|= ucontrol
->value
.enumerated
.item
[1] << e
->shift_r
;
1587 mask
|= (bitmask
- 1) << e
->shift_r
;
1590 mutex_lock(&widget
->codec
->mutex
);
1591 widget
->value
= val
;
1592 dapm_mux_update_power(widget
, kcontrol
, mask
, mux
, val
, e
);
1593 if (widget
->event
) {
1594 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1595 ret
= widget
->event(widget
,
1596 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1600 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1601 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1602 ret
= widget
->event(widget
,
1603 kcontrol
, SND_SOC_DAPM_POST_REG
);
1605 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1608 mutex_unlock(&widget
->codec
->mutex
);
1611 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_enum_double
);
1614 * snd_soc_dapm_get_value_enum_double - dapm semi enumerated double mixer get
1616 * @kcontrol: mixer control
1617 * @ucontrol: control element information
1619 * Callback to get the value of a dapm semi enumerated double mixer control.
1621 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1622 * used for handling bitfield coded enumeration for example.
1624 * Returns 0 for success.
1626 int snd_soc_dapm_get_value_enum_double(struct snd_kcontrol
*kcontrol
,
1627 struct snd_ctl_elem_value
*ucontrol
)
1629 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1630 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1631 unsigned short reg_val
, val
, mux
;
1633 reg_val
= snd_soc_read(widget
->codec
, e
->reg
);
1634 val
= (reg_val
>> e
->shift_l
) & e
->mask
;
1635 for (mux
= 0; mux
< e
->max
; mux
++) {
1636 if (val
== e
->values
[mux
])
1639 ucontrol
->value
.enumerated
.item
[0] = mux
;
1640 if (e
->shift_l
!= e
->shift_r
) {
1641 val
= (reg_val
>> e
->shift_r
) & e
->mask
;
1642 for (mux
= 0; mux
< e
->max
; mux
++) {
1643 if (val
== e
->values
[mux
])
1646 ucontrol
->value
.enumerated
.item
[1] = mux
;
1651 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_value_enum_double
);
1654 * snd_soc_dapm_put_value_enum_double - dapm semi enumerated double mixer set
1656 * @kcontrol: mixer control
1657 * @ucontrol: control element information
1659 * Callback to set the value of a dapm semi enumerated double mixer control.
1661 * Semi enumerated mixer: the enumerated items are referred as values. Can be
1662 * used for handling bitfield coded enumeration for example.
1664 * Returns 0 for success.
1666 int snd_soc_dapm_put_value_enum_double(struct snd_kcontrol
*kcontrol
,
1667 struct snd_ctl_elem_value
*ucontrol
)
1669 struct snd_soc_dapm_widget
*widget
= snd_kcontrol_chip(kcontrol
);
1670 struct soc_enum
*e
= (struct soc_enum
*)kcontrol
->private_value
;
1671 unsigned short val
, mux
;
1672 unsigned short mask
;
1675 if (ucontrol
->value
.enumerated
.item
[0] > e
->max
- 1)
1677 mux
= ucontrol
->value
.enumerated
.item
[0];
1678 val
= e
->values
[ucontrol
->value
.enumerated
.item
[0]] << e
->shift_l
;
1679 mask
= e
->mask
<< e
->shift_l
;
1680 if (e
->shift_l
!= e
->shift_r
) {
1681 if (ucontrol
->value
.enumerated
.item
[1] > e
->max
- 1)
1683 val
|= e
->values
[ucontrol
->value
.enumerated
.item
[1]] << e
->shift_r
;
1684 mask
|= e
->mask
<< e
->shift_r
;
1687 mutex_lock(&widget
->codec
->mutex
);
1688 widget
->value
= val
;
1689 dapm_mux_update_power(widget
, kcontrol
, mask
, mux
, val
, e
);
1690 if (widget
->event
) {
1691 if (widget
->event_flags
& SND_SOC_DAPM_PRE_REG
) {
1692 ret
= widget
->event(widget
,
1693 kcontrol
, SND_SOC_DAPM_PRE_REG
);
1697 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1698 if (widget
->event_flags
& SND_SOC_DAPM_POST_REG
)
1699 ret
= widget
->event(widget
,
1700 kcontrol
, SND_SOC_DAPM_POST_REG
);
1702 ret
= snd_soc_update_bits(widget
->codec
, e
->reg
, mask
, val
);
1705 mutex_unlock(&widget
->codec
->mutex
);
1708 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_value_enum_double
);
1711 * snd_soc_dapm_info_pin_switch - Info for a pin switch
1713 * @kcontrol: mixer control
1714 * @uinfo: control element information
1716 * Callback to provide information about a pin switch control.
1718 int snd_soc_dapm_info_pin_switch(struct snd_kcontrol
*kcontrol
,
1719 struct snd_ctl_elem_info
*uinfo
)
1721 uinfo
->type
= SNDRV_CTL_ELEM_TYPE_BOOLEAN
;
1723 uinfo
->value
.integer
.min
= 0;
1724 uinfo
->value
.integer
.max
= 1;
1728 EXPORT_SYMBOL_GPL(snd_soc_dapm_info_pin_switch
);
1731 * snd_soc_dapm_get_pin_switch - Get information for a pin switch
1733 * @kcontrol: mixer control
1736 int snd_soc_dapm_get_pin_switch(struct snd_kcontrol
*kcontrol
,
1737 struct snd_ctl_elem_value
*ucontrol
)
1739 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1740 const char *pin
= (const char *)kcontrol
->private_value
;
1742 mutex_lock(&codec
->mutex
);
1744 ucontrol
->value
.integer
.value
[0] =
1745 snd_soc_dapm_get_pin_status(codec
, pin
);
1747 mutex_unlock(&codec
->mutex
);
1751 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_switch
);
1754 * snd_soc_dapm_put_pin_switch - Set information for a pin switch
1756 * @kcontrol: mixer control
1759 int snd_soc_dapm_put_pin_switch(struct snd_kcontrol
*kcontrol
,
1760 struct snd_ctl_elem_value
*ucontrol
)
1762 struct snd_soc_codec
*codec
= snd_kcontrol_chip(kcontrol
);
1763 const char *pin
= (const char *)kcontrol
->private_value
;
1765 mutex_lock(&codec
->mutex
);
1767 if (ucontrol
->value
.integer
.value
[0])
1768 snd_soc_dapm_enable_pin(codec
, pin
);
1770 snd_soc_dapm_disable_pin(codec
, pin
);
1772 snd_soc_dapm_sync(codec
);
1774 mutex_unlock(&codec
->mutex
);
1778 EXPORT_SYMBOL_GPL(snd_soc_dapm_put_pin_switch
);
1781 * snd_soc_dapm_new_control - create new dapm control
1782 * @codec: audio codec
1783 * @widget: widget template
1785 * Creates a new dapm control based upon the template.
1787 * Returns 0 for success else error.
1789 int snd_soc_dapm_new_control(struct snd_soc_codec
*codec
,
1790 const struct snd_soc_dapm_widget
*widget
)
1792 struct snd_soc_dapm_widget
*w
;
1794 if ((w
= dapm_cnew_widget(widget
)) == NULL
)
1798 INIT_LIST_HEAD(&w
->sources
);
1799 INIT_LIST_HEAD(&w
->sinks
);
1800 INIT_LIST_HEAD(&w
->list
);
1801 list_add(&w
->list
, &codec
->dapm_widgets
);
1803 /* machine layer set ups unconnected pins and insertions */
1807 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_control
);
1810 * snd_soc_dapm_new_controls - create new dapm controls
1811 * @codec: audio codec
1812 * @widget: widget array
1813 * @num: number of widgets
1815 * Creates new DAPM controls based upon the templates.
1817 * Returns 0 for success else error.
1819 int snd_soc_dapm_new_controls(struct snd_soc_codec
*codec
,
1820 const struct snd_soc_dapm_widget
*widget
,
1825 for (i
= 0; i
< num
; i
++) {
1826 ret
= snd_soc_dapm_new_control(codec
, widget
);
1829 "ASoC: Failed to create DAPM control %s: %d\n",
1837 EXPORT_SYMBOL_GPL(snd_soc_dapm_new_controls
);
1841 * snd_soc_dapm_stream_event - send a stream event to the dapm core
1842 * @codec: audio codec
1843 * @stream: stream name
1844 * @event: stream event
1846 * Sends a stream event to the dapm core. The core then makes any
1847 * necessary widget power changes.
1849 * Returns 0 for success else error.
1851 int snd_soc_dapm_stream_event(struct snd_soc_codec
*codec
,
1852 char *stream
, int event
)
1854 struct snd_soc_dapm_widget
*w
;
1859 mutex_lock(&codec
->mutex
);
1860 list_for_each_entry(w
, &codec
->dapm_widgets
, list
)
1864 pr_debug("widget %s\n %s stream %s event %d\n",
1865 w
->name
, w
->sname
, stream
, event
);
1866 if (strstr(w
->sname
, stream
)) {
1868 case SND_SOC_DAPM_STREAM_START
:
1871 case SND_SOC_DAPM_STREAM_STOP
:
1874 case SND_SOC_DAPM_STREAM_SUSPEND
:
1879 case SND_SOC_DAPM_STREAM_RESUME
:
1885 case SND_SOC_DAPM_STREAM_PAUSE_PUSH
:
1887 case SND_SOC_DAPM_STREAM_PAUSE_RELEASE
:
1892 mutex_unlock(&codec
->mutex
);
1894 dapm_power_widgets(codec
, event
);
1895 dump_dapm(codec
, __func__
);
1898 EXPORT_SYMBOL_GPL(snd_soc_dapm_stream_event
);
1901 * snd_soc_dapm_enable_pin - enable pin.
1905 * Enables input/output pin and its parents or children widgets iff there is
1906 * a valid audio route and active audio stream.
1907 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1908 * do any widget power switching.
1910 int snd_soc_dapm_enable_pin(struct snd_soc_codec
*codec
, const char *pin
)
1912 return snd_soc_dapm_set_pin(codec
, pin
, 1);
1914 EXPORT_SYMBOL_GPL(snd_soc_dapm_enable_pin
);
1917 * snd_soc_dapm_disable_pin - disable pin.
1921 * Disables input/output pin and its parents or children widgets.
1922 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1923 * do any widget power switching.
1925 int snd_soc_dapm_disable_pin(struct snd_soc_codec
*codec
, const char *pin
)
1927 return snd_soc_dapm_set_pin(codec
, pin
, 0);
1929 EXPORT_SYMBOL_GPL(snd_soc_dapm_disable_pin
);
1932 * snd_soc_dapm_nc_pin - permanently disable pin.
1936 * Marks the specified pin as being not connected, disabling it along
1937 * any parent or child widgets. At present this is identical to
1938 * snd_soc_dapm_disable_pin() but in future it will be extended to do
1939 * additional things such as disabling controls which only affect
1940 * paths through the pin.
1942 * NOTE: snd_soc_dapm_sync() needs to be called after this for DAPM to
1943 * do any widget power switching.
1945 int snd_soc_dapm_nc_pin(struct snd_soc_codec
*codec
, const char *pin
)
1947 return snd_soc_dapm_set_pin(codec
, pin
, 0);
1949 EXPORT_SYMBOL_GPL(snd_soc_dapm_nc_pin
);
1952 * snd_soc_dapm_get_pin_status - get audio pin status
1953 * @codec: audio codec
1954 * @pin: audio signal pin endpoint (or start point)
1956 * Get audio pin status - connected or disconnected.
1958 * Returns 1 for connected otherwise 0.
1960 int snd_soc_dapm_get_pin_status(struct snd_soc_codec
*codec
, const char *pin
)
1962 struct snd_soc_dapm_widget
*w
;
1964 list_for_each_entry(w
, &codec
->dapm_widgets
, list
) {
1965 if (!strcmp(w
->name
, pin
))
1966 return w
->connected
;
1971 EXPORT_SYMBOL_GPL(snd_soc_dapm_get_pin_status
);
1974 * snd_soc_dapm_free - free dapm resources
1975 * @socdev: SoC device
1977 * Free all dapm widgets and resources.
1979 void snd_soc_dapm_free(struct snd_soc_device
*socdev
)
1981 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
1983 snd_soc_dapm_sys_remove(socdev
->dev
);
1984 dapm_free_widgets(codec
);
1986 EXPORT_SYMBOL_GPL(snd_soc_dapm_free
);
1988 /* Module information */
1989 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
1990 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");
1991 MODULE_LICENSE("GPL");