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1 | /* |
2 | * soc-jack.c -- ALSA SoC jack handling | |
3 | * | |
4 | * Copyright 2008 Wolfson Microelectronics PLC. | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | */ | |
13 | ||
14 | #include <sound/jack.h> | |
15 | #include <sound/soc.h> | |
16 | #include <sound/soc-dapm.h> | |
17 | ||
18 | /** | |
19 | * snd_soc_jack_new - Create a new jack | |
20 | * @card: ASoC card | |
21 | * @id: an identifying string for this jack | |
22 | * @type: a bitmask of enum snd_jack_type values that can be detected by | |
23 | * this jack | |
24 | * @jack: structure to use for the jack | |
25 | * | |
26 | * Creates a new jack object. | |
27 | * | |
28 | * Returns zero if successful, or a negative error code on failure. | |
29 | * On success jack will be initialised. | |
30 | */ | |
31 | int snd_soc_jack_new(struct snd_soc_card *card, const char *id, int type, | |
32 | struct snd_soc_jack *jack) | |
33 | { | |
34 | jack->card = card; | |
35 | INIT_LIST_HEAD(&jack->pins); | |
36 | ||
6627a653 | 37 | return snd_jack_new(card->codec->card, id, type, &jack->jack); |
8a2cd618 MB |
38 | } |
39 | EXPORT_SYMBOL_GPL(snd_soc_jack_new); | |
40 | ||
41 | /** | |
42 | * snd_soc_jack_report - Report the current status for a jack | |
43 | * | |
44 | * @jack: the jack | |
45 | * @status: a bitmask of enum snd_jack_type values that are currently detected. | |
46 | * @mask: a bitmask of enum snd_jack_type values that being reported. | |
47 | * | |
48 | * If configured using snd_soc_jack_add_pins() then the associated | |
49 | * DAPM pins will be enabled or disabled as appropriate and DAPM | |
50 | * synchronised. | |
51 | * | |
52 | * Note: This function uses mutexes and should be called from a | |
53 | * context which can sleep (such as a workqueue). | |
54 | */ | |
55 | void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask) | |
56 | { | |
6627a653 | 57 | struct snd_soc_codec *codec = jack->card->codec; |
8a2cd618 MB |
58 | struct snd_soc_jack_pin *pin; |
59 | int enable; | |
60 | int oldstatus; | |
61 | ||
62 | if (!jack) { | |
63 | WARN_ON_ONCE(!jack); | |
64 | return; | |
65 | } | |
66 | ||
67 | mutex_lock(&codec->mutex); | |
68 | ||
69 | oldstatus = jack->status; | |
70 | ||
71 | jack->status &= ~mask; | |
72 | jack->status |= status; | |
73 | ||
74 | /* The DAPM sync is expensive enough to be worth skipping */ | |
75 | if (jack->status == oldstatus) | |
76 | goto out; | |
77 | ||
78 | list_for_each_entry(pin, &jack->pins, list) { | |
79 | enable = pin->mask & status; | |
80 | ||
81 | if (pin->invert) | |
82 | enable = !enable; | |
83 | ||
84 | if (enable) | |
85 | snd_soc_dapm_enable_pin(codec, pin->pin); | |
86 | else | |
87 | snd_soc_dapm_disable_pin(codec, pin->pin); | |
88 | } | |
89 | ||
90 | snd_soc_dapm_sync(codec); | |
91 | ||
92 | snd_jack_report(jack->jack, status); | |
93 | ||
94 | out: | |
95 | mutex_unlock(&codec->mutex); | |
96 | } | |
97 | EXPORT_SYMBOL_GPL(snd_soc_jack_report); | |
98 | ||
99 | /** | |
100 | * snd_soc_jack_add_pins - Associate DAPM pins with an ASoC jack | |
101 | * | |
102 | * @jack: ASoC jack | |
103 | * @count: Number of pins | |
104 | * @pins: Array of pins | |
105 | * | |
106 | * After this function has been called the DAPM pins specified in the | |
107 | * pins array will have their status updated to reflect the current | |
108 | * state of the jack whenever the jack status is updated. | |
109 | */ | |
110 | int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count, | |
111 | struct snd_soc_jack_pin *pins) | |
112 | { | |
113 | int i; | |
114 | ||
115 | for (i = 0; i < count; i++) { | |
116 | if (!pins[i].pin) { | |
117 | printk(KERN_ERR "No name for pin %d\n", i); | |
118 | return -EINVAL; | |
119 | } | |
120 | if (!pins[i].mask) { | |
121 | printk(KERN_ERR "No mask for pin %d (%s)\n", i, | |
122 | pins[i].pin); | |
123 | return -EINVAL; | |
124 | } | |
125 | ||
126 | INIT_LIST_HEAD(&pins[i].list); | |
127 | list_add(&(pins[i].list), &jack->pins); | |
128 | } | |
129 | ||
130 | /* Update to reflect the last reported status; canned jack | |
131 | * implementations are likely to set their state before the | |
132 | * card has an opportunity to associate pins. | |
133 | */ | |
134 | snd_soc_jack_report(jack, 0, 0); | |
135 | ||
136 | return 0; | |
137 | } | |
138 | EXPORT_SYMBOL_GPL(snd_soc_jack_add_pins); |