2 * soc-jack.c -- ALSA SoC jack handling
4 * Copyright 2008 Wolfson Microelectronics PLC.
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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.
14 #include <sound/jack.h>
15 #include <sound/soc.h>
16 #include <sound/soc-dapm.h>
19 * snd_soc_jack_new - Create a new jack
21 * @id: an identifying string for this jack
22 * @type: a bitmask of enum snd_jack_type values that can be detected by
24 * @jack: structure to use for the jack
26 * Creates a new jack object.
28 * Returns zero if successful, or a negative error code on failure.
29 * On success jack will be initialised.
31 int snd_soc_jack_new(struct snd_soc_card *card, const char *id, int type,
32 struct snd_soc_jack *jack)
35 INIT_LIST_HEAD(&jack->pins);
37 return snd_jack_new(card->socdev->codec->card, id, type, &jack->jack);
39 EXPORT_SYMBOL_GPL(snd_soc_jack_new);
42 * snd_soc_jack_report - Report the current status for a 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.
48 * If configured using snd_soc_jack_add_pins() then the associated
49 * DAPM pins will be enabled or disabled as appropriate and DAPM
52 * Note: This function uses mutexes and should be called from a
53 * context which can sleep (such as a workqueue).
55 void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
57 struct snd_soc_codec *codec = jack->card->socdev->codec;
58 struct snd_soc_jack_pin *pin;
67 mutex_lock(&codec->mutex);
69 oldstatus = jack->status;
71 jack->status &= ~mask;
72 jack->status |= status;
74 /* The DAPM sync is expensive enough to be worth skipping */
75 if (jack->status == oldstatus)
78 list_for_each_entry(pin, &jack->pins, list) {
79 enable = pin->mask & status;
85 snd_soc_dapm_enable_pin(codec, pin->pin);
87 snd_soc_dapm_disable_pin(codec, pin->pin);
90 snd_soc_dapm_sync(codec);
92 snd_jack_report(jack->jack, status);
95 mutex_unlock(&codec->mutex);
97 EXPORT_SYMBOL_GPL(snd_soc_jack_report);
100 * snd_soc_jack_add_pins - Associate DAPM pins with an ASoC jack
103 * @count: Number of pins
104 * @pins: Array of pins
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.
110 int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count,
111 struct snd_soc_jack_pin *pins)
115 for (i = 0; i < count; i++) {
117 printk(KERN_ERR "No name for pin %d\n", i);
121 printk(KERN_ERR "No mask for pin %d (%s)\n", i,
126 INIT_LIST_HEAD(&pins[i].list);
127 list_add(&(pins[i].list), &jack->pins);
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.
134 snd_soc_jack_report(jack, 0, 0);
138 EXPORT_SYMBOL_GPL(snd_soc_jack_add_pins);