1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/*
* soc-jack.c -- ALSA SoC jack handling
*
* Copyright 2008 Wolfson Microelectronics PLC.
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <sound/jack.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
/**
* snd_soc_jack_new - Create a new jack
* @card: ASoC card
* @id: an identifying string for this jack
* @type: a bitmask of enum snd_jack_type values that can be detected by
* this jack
* @jack: structure to use for the jack
*
* Creates a new jack object.
*
* Returns zero if successful, or a negative error code on failure.
* On success jack will be initialised.
*/
int snd_soc_jack_new(struct snd_soc_card *card, const char *id, int type,
struct snd_soc_jack *jack)
{
jack->card = card;
INIT_LIST_HEAD(&jack->pins);
return snd_jack_new(card->codec->card, id, type, &jack->jack);
}
EXPORT_SYMBOL_GPL(snd_soc_jack_new);
/**
* snd_soc_jack_report - Report the current status for a jack
*
* @jack: the jack
* @status: a bitmask of enum snd_jack_type values that are currently detected.
* @mask: a bitmask of enum snd_jack_type values that being reported.
*
* If configured using snd_soc_jack_add_pins() then the associated
* DAPM pins will be enabled or disabled as appropriate and DAPM
* synchronised.
*
* Note: This function uses mutexes and should be called from a
* context which can sleep (such as a workqueue).
*/
void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
{
struct snd_soc_codec *codec = jack->card->codec;
struct snd_soc_jack_pin *pin;
int enable;
int oldstatus;
if (!jack) {
WARN_ON_ONCE(!jack);
return;
}
mutex_lock(&codec->mutex);
oldstatus = jack->status;
jack->status &= ~mask;
jack->status |= status;
/* The DAPM sync is expensive enough to be worth skipping */
if (jack->status == oldstatus)
goto out;
list_for_each_entry(pin, &jack->pins, list) {
enable = pin->mask & status;
if (pin->invert)
enable = !enable;
if (enable)
snd_soc_dapm_enable_pin(codec, pin->pin);
else
snd_soc_dapm_disable_pin(codec, pin->pin);
}
snd_soc_dapm_sync(codec);
snd_jack_report(jack->jack, status);
out:
mutex_unlock(&codec->mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_jack_report);
/**
* snd_soc_jack_add_pins - Associate DAPM pins with an ASoC jack
*
* @jack: ASoC jack
* @count: Number of pins
* @pins: Array of pins
*
* After this function has been called the DAPM pins specified in the
* pins array will have their status updated to reflect the current
* state of the jack whenever the jack status is updated.
*/
int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count,
struct snd_soc_jack_pin *pins)
{
int i;
for (i = 0; i < count; i++) {
if (!pins[i].pin) {
printk(KERN_ERR "No name for pin %d\n", i);
return -EINVAL;
}
if (!pins[i].mask) {
printk(KERN_ERR "No mask for pin %d (%s)\n", i,
pins[i].pin);
return -EINVAL;
}
INIT_LIST_HEAD(&pins[i].list);
list_add(&(pins[i].list), &jack->pins);
}
/* Update to reflect the last reported status; canned jack
* implementations are likely to set their state before the
* card has an opportunity to associate pins.
*/
snd_soc_jack_report(jack, 0, 0);
return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_jack_add_pins);
|
