139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
/*
|
|
* 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->socdev->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->socdev->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);
|