soc-jack.c | Explore in Territory

// SPDX-License-Identifier: GPL-2.0+
//
// soc-jack.c  --  ALSA SoC jack handling
//
// Copyright 2008 Wolfson Microelectronics PLC.
//
// Author: Mark Brown <[email protected]>

#include <sound/jack.h>
#include <sound/soc.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/export.h>
#include <linux/suspend.h>
#include <trace/events/asoc.h>

/**
 * 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)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_soc_jack_add_zones - Associate voltage zones with jack
 *
 * @jack:  ASoC jack
 * @count: Number of zones
 * @zones:  Array of zones
 *
 * After this function has been called the zones specified in the
 * array will be associated with the jack.
 */
int snd_soc_jack_add_zones(struct snd_soc_jack *jack, int count,
			  struct snd_soc_jack_zone *zones)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_soc_jack_get_type - Based on the mic bias value, this function returns
 * the type of jack from the zones declared in the jack type
 *
 * @jack:  ASoC jack
 * @micbias_voltage:  mic bias voltage at adc channel when jack is plugged in
 *
 * Based on the mic bias value passed, this function helps identify
 * the type of jack from the already declared jack zones
 */
int snd_soc_jack_get_type(struct snd_soc_jack *jack, int micbias_voltage)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_soc_jack_add_pins - Associate DAPM pins with an ASoC jack
 *
 * @jack:  ASoC jack created with snd_soc_card_jack_new_pins()
 * @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)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_soc_jack_notifier_register - Register a notifier for jack status
 *
 * @jack:  ASoC jack
 * @nb:    Notifier block to register
 *
 * Register for notification of the current status of the jack.  Note
 * that it is not possible to report additional jack events in the
 * callback from the notifier, this is intended to support
 * applications such as enabling electrical detection only when a
 * mechanical detection event has occurred.
 */
void snd_soc_jack_notifier_register(struct snd_soc_jack *jack,
				    struct notifier_block *nb)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_soc_jack_notifier_unregister - Unregister a notifier for jack status
 *
 * @jack:  ASoC jack
 * @nb:    Notifier block to unregister
 *
 * Stop notifying for status changes.
 */
void snd_soc_jack_notifier_unregister(struct snd_soc_jack *jack,
				      struct notifier_block *nb)
{ … }
EXPORT_SYMBOL_GPL(…);

#ifdef CONFIG_GPIOLIB
struct jack_gpio_tbl { … };

/* gpio detect */
static void snd_soc_jack_gpio_detect(struct snd_soc_jack_gpio *gpio)
{ … }

/* irq handler for gpio pin */
static irqreturn_t gpio_handler(int irq, void *data)
{ … }

/* gpio work */
static void gpio_work(struct work_struct *work)
{ … }

static int snd_soc_jack_pm_notifier(struct notifier_block *nb,
				    unsigned long action, void *data)
{ … }

static void jack_free_gpios(struct snd_soc_jack *jack, int count,
			    struct snd_soc_jack_gpio *gpios)
{ … }

static void jack_devres_free_gpios(struct device *dev, void *res)
{ … }

/**
 * snd_soc_jack_add_gpios - Associate GPIO pins with an ASoC jack
 *
 * @jack:  ASoC jack
 * @count: number of pins
 * @gpios: array of gpio pins
 *
 * This function will request gpio, set data direction and request irq
 * for each gpio in the array.
 */
int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
			struct snd_soc_jack_gpio *gpios)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_soc_jack_add_gpiods - Associate GPIO descriptor pins with an ASoC jack
 *
 * @gpiod_dev: GPIO consumer device
 * @jack:      ASoC jack
 * @count:     number of pins
 * @gpios:     array of gpio pins
 *
 * This function will request gpio, set data direction and request irq
 * for each gpio in the array.
 */
int snd_soc_jack_add_gpiods(struct device *gpiod_dev,
			    struct snd_soc_jack *jack,
			    int count, struct snd_soc_jack_gpio *gpios)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * snd_soc_jack_free_gpios - Release GPIO pins' resources of an ASoC jack
 *
 * @jack:  ASoC jack
 * @count: number of pins
 * @gpios: array of gpio pins
 *
 * Release gpio and irq resources for gpio pins associated with an ASoC jack.
 */
void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
			struct snd_soc_jack_gpio *gpios)
{ … }
EXPORT_SYMBOL_GPL(…);
#endif	/* CONFIG_GPIOLIB */
linux/sound/soc/soc-jack.c
