[deliverable/linux.git] / sound / soc / soc-jack.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 <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/export.h>
#include <trace/events/asoc.h>

/**
 * snd_soc_card_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
 * @pins:  Array of jack pins to be added to the jack or NULL
 * @num_pins: Number of elements in the @pins array
 *
 * 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_card_jack_new(struct snd_soc_card *card, const char *id, int type,
	struct snd_soc_jack *jack, struct snd_soc_jack_pin *pins,
	unsigned int num_pins)
{
	int ret;

	mutex_init(&jack->mutex);
	jack->card = card;
	INIT_LIST_HEAD(&jack->pins);
	INIT_LIST_HEAD(&jack->jack_zones);
	BLOCKING_INIT_NOTIFIER_HEAD(&jack->notifier);

	ret = snd_jack_new(card->snd_card, id, type, &jack->jack, false, false);
	if (ret)
		return ret;

	if (num_pins)
		return snd_soc_jack_add_pins(jack, num_pins, pins);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_card_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_dapm_context *dapm;
	struct snd_soc_jack_pin *pin;
	unsigned int sync = 0;
	int enable;

	trace_snd_soc_jack_report(jack, mask, status);

	if (!jack)
		return;

	dapm = &jack->card->dapm;

	mutex_lock(&jack->mutex);

	jack->status &= ~mask;
	jack->status |= status & mask;

	trace_snd_soc_jack_notify(jack, status);

	list_for_each_entry(pin, &jack->pins, list) {
		enable = pin->mask & jack->status;

		if (pin->invert)
			enable = !enable;

		if (enable)
			snd_soc_dapm_enable_pin(dapm, pin->pin);
		else
			snd_soc_dapm_disable_pin(dapm, pin->pin);

		/* we need to sync for this case only */
		sync = 1;
	}

	/* Report before the DAPM sync to help users updating micbias status */
	blocking_notifier_call_chain(&jack->notifier, jack->status, jack);

	if (sync)
		snd_soc_dapm_sync(dapm);

	snd_jack_report(jack->jack, jack->status);

	mutex_unlock(&jack->mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_jack_report);

/**
 * 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)
{
	int i;

	for (i = 0; i < count; i++) {
		INIT_LIST_HEAD(&zones[i].list);
		list_add(&(zones[i].list), &jack->jack_zones);
	}
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_jack_add_zones);

/**
 * 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)
{
	struct snd_soc_jack_zone *zone;

	list_for_each_entry(zone, &jack->jack_zones, list) {
		if (micbias_voltage >= zone->min_mv &&
			micbias_voltage < zone->max_mv)
				return zone->jack_type;
	}
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_jack_get_type);

/**
 * 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) {
			dev_err(jack->card->dev, "ASoC: No name for pin %d\n",
				i);
			return -EINVAL;
		}
		if (!pins[i].mask) {
			dev_err(jack->card->dev, "ASoC: 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);
		snd_jack_add_new_kctl(jack->jack, pins[i].pin, pins[i].mask);
	}

	/* 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);

/**
 * 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)
{
	blocking_notifier_chain_register(&jack->notifier, nb);
}
EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_register);

/**
 * 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)
{
	blocking_notifier_chain_unregister(&jack->notifier, nb);
}
EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_unregister);

#ifdef CONFIG_GPIOLIB
/* gpio detect */
static void snd_soc_jack_gpio_detect(struct snd_soc_jack_gpio *gpio)
{
	struct snd_soc_jack *jack = gpio->jack;
	int enable;
	int report;

	enable = gpiod_get_value_cansleep(gpio->desc);
	if (gpio->invert)
		enable = !enable;

	if (enable)
		report = gpio->report;
	else
		report = 0;

	if (gpio->jack_status_check)
		report = gpio->jack_status_check(gpio->data);

	snd_soc_jack_report(jack, report, gpio->report);
}

/* irq handler for gpio pin */
static irqreturn_t gpio_handler(int irq, void *data)
{
	struct snd_soc_jack_gpio *gpio = data;
	struct device *dev = gpio->jack->card->dev;

	trace_snd_soc_jack_irq(gpio->name);

	if (device_may_wakeup(dev))
		pm_wakeup_event(dev, gpio->debounce_time + 50);

	queue_delayed_work(system_power_efficient_wq, &gpio->work,
			      msecs_to_jiffies(gpio->debounce_time));

	return IRQ_HANDLED;
}

/* gpio work */
static void gpio_work(struct work_struct *work)
{
	struct snd_soc_jack_gpio *gpio;

	gpio = container_of(work, struct snd_soc_jack_gpio, work.work);
	snd_soc_jack_gpio_detect(gpio);
}

/**
 * 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)
{
	int i, ret;

	for (i = 0; i < count; i++) {
		if (!gpios[i].name) {
			dev_err(jack->card->dev,
				"ASoC: No name for gpio at index %d\n", i);
			ret = -EINVAL;
			goto undo;
		}

		if (gpios[i].desc) {
			/* Already have a GPIO descriptor. */
			goto got_gpio;
		} else if (gpios[i].gpiod_dev) {
			/* Get a GPIO descriptor */
			gpios[i].desc = gpiod_get_index(gpios[i].gpiod_dev,
							gpios[i].name,
							gpios[i].idx, GPIOD_IN);
			if (IS_ERR(gpios[i].desc)) {
				ret = PTR_ERR(gpios[i].desc);
				dev_err(gpios[i].gpiod_dev,
					"ASoC: Cannot get gpio at index %d: %d",
					i, ret);
				goto undo;
			}
		} else {
			/* legacy GPIO number */
			if (!gpio_is_valid(gpios[i].gpio)) {
				dev_err(jack->card->dev,
					"ASoC: Invalid gpio %d\n",
					gpios[i].gpio);
				ret = -EINVAL;
				goto undo;
			}

			ret = gpio_request_one(gpios[i].gpio, GPIOF_IN,
					       gpios[i].name);
			if (ret)
				goto undo;

			gpios[i].desc = gpio_to_desc(gpios[i].gpio);
		}
got_gpio:
		INIT_DELAYED_WORK(&gpios[i].work, gpio_work);
		gpios[i].jack = jack;

		ret = request_any_context_irq(gpiod_to_irq(gpios[i].desc),
					      gpio_handler,
					      IRQF_TRIGGER_RISING |
					      IRQF_TRIGGER_FALLING,
					      gpios[i].name,
					      &gpios[i]);
		if (ret < 0)
			goto err;

		if (gpios[i].wake) {
			ret = irq_set_irq_wake(gpiod_to_irq(gpios[i].desc), 1);
			if (ret != 0)
				dev_err(jack->card->dev,
					"ASoC: Failed to mark GPIO at index %d as wake source: %d\n",
					i, ret);
		}

		/* Expose GPIO value over sysfs for diagnostic purposes */
		gpiod_export(gpios[i].desc, false);

		/* Update initial jack status */
		schedule_delayed_work(&gpios[i].work,
				      msecs_to_jiffies(gpios[i].debounce_time));
	}

	return 0;

err:
	gpio_free(gpios[i].gpio);
undo:
	snd_soc_jack_free_gpios(jack, i, gpios);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_jack_add_gpios);

/**
 * 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)
{
	int i;

	for (i = 0; i < count; i++)
		gpios[i].gpiod_dev = gpiod_dev;

	return snd_soc_jack_add_gpios(jack, count, gpios);
}
EXPORT_SYMBOL_GPL(snd_soc_jack_add_gpiods);

/**
 * 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)
{
	int i;

	for (i = 0; i < count; i++) {
		gpiod_unexport(gpios[i].desc);
		free_irq(gpiod_to_irq(gpios[i].desc), &gpios[i]);
		cancel_delayed_work_sync(&gpios[i].work);
		gpiod_put(gpios[i].desc);
		gpios[i].jack = NULL;
	}
}
EXPORT_SYMBOL_GPL(snd_soc_jack_free_gpios);
#endif	/* CONFIG_GPIOLIB */
Commit	Line	Data
8a2cd618 MB	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>
ec67624d	16	#include <linux/gpio.h>
50dfb69d	17	#include <linux/gpio/consumer.h>
ec67624d LCM	18	#include <linux/interrupt.h>
	19	#include <linux/workqueue.h>
	20	#include <linux/delay.h>
d81a6d71	21	#include <linux/export.h>
3028eb8c	22	#include <trace/events/asoc.h>
8a2cd618 MB	23
8a2cd618 MB	24	/**
97093996 LPC	25	* snd_soc_card_jack_new - Create a new jack
97093996 LPC	26	* @card: ASoC card
8a2cd618 MB	27	* @id: an identifying string for this jack
	28	* @type: a bitmask of enum snd_jack_type values that can be detected by
	29	* this jack
	30	* @jack: structure to use for the jack
97093996 LPC	31	* @pins: Array of jack pins to be added to the jack or NULL
97093996 LPC	32	* @num_pins: Number of elements in the @pins array
8a2cd618 MB	33	*
	34	* Creates a new jack object.
	35	*
	36	* Returns zero if successful, or a negative error code on failure.
	37	* On success jack will be initialised.
	38	*/
97093996 LPC	39	int snd_soc_card_jack_new(struct snd_soc_card card, const char id, int type,
	40	struct snd_soc_jack jack, struct snd_soc_jack_pin pins,
	41	unsigned int num_pins)
8a2cd618	42	{
97093996 LPC	43	int ret;
97093996 LPC	44
2667b4b8	45	mutex_init(&jack->mutex);
97093996	46	jack->card = card;
8a2cd618	47	INIT_LIST_HEAD(&jack->pins);
fa9879ed	48	INIT_LIST_HEAD(&jack->jack_zones);
d5021ec9	49	BLOCKING_INIT_NOTIFIER_HEAD(&jack->notifier);
8a2cd618	50
4e3f0dc6	51	ret = snd_jack_new(card->snd_card, id, type, &jack->jack, false, false);
97093996 LPC	52	if (ret)
	53	return ret;
	54
	55	if (num_pins)
	56	return snd_soc_jack_add_pins(jack, num_pins, pins);
	57
	58	return 0;
8a2cd618	59	}
97093996	60	EXPORT_SYMBOL_GPL(snd_soc_card_jack_new);
8a2cd618 MB	61
	62	/**
	63	* snd_soc_jack_report - Report the current status for a jack
	64	*
	65	* @jack: the jack
	66	* @status: a bitmask of enum snd_jack_type values that are currently detected.
	67	* @mask: a bitmask of enum snd_jack_type values that being reported.
	68	*
	69	* If configured using snd_soc_jack_add_pins() then the associated
	70	* DAPM pins will be enabled or disabled as appropriate and DAPM
	71	* synchronised.
	72	*
	73	* Note: This function uses mutexes and should be called from a
	74	* context which can sleep (such as a workqueue).
	75	*/
	76	void snd_soc_jack_report(struct snd_soc_jack *jack, int status, int mask)
	77	{
ce6120cc	78	struct snd_soc_dapm_context *dapm;
8a2cd618	79	struct snd_soc_jack_pin *pin;
30a765d6	80	unsigned int sync = 0;
8a2cd618	81	int enable;
8a2cd618	82
3028eb8c MB	83	trace_snd_soc_jack_report(jack, mask, status);
3028eb8c MB	84
3a278a0c	85	if (!jack)
8a2cd618	86	return;
3a278a0c	87
97093996	88	dapm = &jack->card->dapm;
8a2cd618	89
2667b4b8	90	mutex_lock(&jack->mutex);
8a2cd618	91
8a2cd618	92	jack->status &= ~mask;
178b699c	93	jack->status \|= status & mask;
8a2cd618	94
3028eb8c MB	95	trace_snd_soc_jack_notify(jack, status);
3028eb8c MB	96
8a2cd618	97	list_for_each_entry(pin, &jack->pins, list) {
178b699c	98	enable = pin->mask & jack->status;
8a2cd618 MB	99
	100	if (pin->invert)
	101	enable = !enable;
	102
	103	if (enable)
ce6120cc	104	snd_soc_dapm_enable_pin(dapm, pin->pin);
8a2cd618	105	else
ce6120cc	106	snd_soc_dapm_disable_pin(dapm, pin->pin);
30a765d6 VK	107
	108	/* we need to sync for this case only */
	109	sync = 1;
8a2cd618 MB	110	}
8a2cd618 MB	111
d5021ec9	112	/* Report before the DAPM sync to help users updating micbias status */
12022a78	113	blocking_notifier_call_chain(&jack->notifier, jack->status, jack);
d5021ec9	114
30a765d6 VK	115	if (sync)
30a765d6 VK	116	snd_soc_dapm_sync(dapm);
8a2cd618	117
747da0f8	118	snd_jack_report(jack->jack, jack->status);
8a2cd618	119
2667b4b8	120	mutex_unlock(&jack->mutex);
8a2cd618 MB	121	}
	122	EXPORT_SYMBOL_GPL(snd_soc_jack_report);
	123
fa9879ed VK	124	/**
	125	* snd_soc_jack_add_zones - Associate voltage zones with jack
	126	*
	127	* @jack: ASoC jack
	128	* @count: Number of zones
bb29a93b	129	* @zones: Array of zones
fa9879ed VK	130	*
	131	* After this function has been called the zones specified in the
	132	* array will be associated with the jack.
	133	*/
	134	int snd_soc_jack_add_zones(struct snd_soc_jack *jack, int count,
	135	struct snd_soc_jack_zone *zones)
	136	{
	137	int i;
	138
	139	for (i = 0; i < count; i++) {
	140	INIT_LIST_HEAD(&zones[i].list);
	141	list_add(&(zones[i].list), &jack->jack_zones);
	142	}
	143	return 0;
	144	}
	145	EXPORT_SYMBOL_GPL(snd_soc_jack_add_zones);
	146
	147	/**
	148	* snd_soc_jack_get_type - Based on the mic bias value, this function returns
a92b078e	149	* the type of jack from the zones declared in the jack type
fa9879ed	150	*
a92b078e	151	* @jack: ASoC jack
fa9879ed VK	152	* @micbias_voltage: mic bias voltage at adc channel when jack is plugged in
	153	*
	154	* Based on the mic bias value passed, this function helps identify
a92b078e	155	* the type of jack from the already declared jack zones
fa9879ed VK	156	*/
	157	int snd_soc_jack_get_type(struct snd_soc_jack *jack, int micbias_voltage)
	158	{
	159	struct snd_soc_jack_zone *zone;
	160
	161	list_for_each_entry(zone, &jack->jack_zones, list) {
	162	if (micbias_voltage >= zone->min_mv &&
	163	micbias_voltage < zone->max_mv)
	164	return zone->jack_type;
	165	}
	166	return 0;
	167	}
	168	EXPORT_SYMBOL_GPL(snd_soc_jack_get_type);
	169
8a2cd618 MB	170	/**
	171	* snd_soc_jack_add_pins - Associate DAPM pins with an ASoC jack
	172	*
	173	* @jack: ASoC jack
	174	* @count: Number of pins
	175	* @pins: Array of pins
	176	*
	177	* After this function has been called the DAPM pins specified in the
	178	* pins array will have their status updated to reflect the current
	179	* state of the jack whenever the jack status is updated.
	180	*/
	181	int snd_soc_jack_add_pins(struct snd_soc_jack *jack, int count,
	182	struct snd_soc_jack_pin *pins)
	183	{
	184	int i;
	185
	186	for (i = 0; i < count; i++) {
	187	if (!pins[i].pin) {
97093996	188	dev_err(jack->card->dev, "ASoC: No name for pin %d\n",
008d55e2	189	i);
8a2cd618 MB	190	return -EINVAL;
	191	}
	192	if (!pins[i].mask) {
97093996	193	dev_err(jack->card->dev, "ASoC: No mask for pin %d"
008d55e2	194	" (%s)\n", i, pins[i].pin);
8a2cd618 MB	195	return -EINVAL;
	196	}
	197
	198	INIT_LIST_HEAD(&pins[i].list);
	199	list_add(&(pins[i].list), &jack->pins);
f63e8581	200	snd_jack_add_new_kctl(jack->jack, pins[i].pin, pins[i].mask);
8a2cd618 MB	201	}
	202
	203	/* Update to reflect the last reported status; canned jack
	204	* implementations are likely to set their state before the
	205	* card has an opportunity to associate pins.
	206	*/
	207	snd_soc_jack_report(jack, 0, 0);
	208
	209	return 0;
	210	}
	211	EXPORT_SYMBOL_GPL(snd_soc_jack_add_pins);
ec67624d	212
d5021ec9 MB	213	/**
	214	* snd_soc_jack_notifier_register - Register a notifier for jack status
	215	*
	216	* @jack: ASoC jack
	217	* @nb: Notifier block to register
	218	*
	219	* Register for notification of the current status of the jack. Note
	220	* that it is not possible to report additional jack events in the
	221	* callback from the notifier, this is intended to support
	222	* applications such as enabling electrical detection only when a
	223	* mechanical detection event has occurred.
	224	*/
	225	void snd_soc_jack_notifier_register(struct snd_soc_jack *jack,
	226	struct notifier_block *nb)
	227	{
	228	blocking_notifier_chain_register(&jack->notifier, nb);
	229	}
	230	EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_register);
	231
	232	/**
	233	* snd_soc_jack_notifier_unregister - Unregister a notifier for jack status
	234	*
	235	* @jack: ASoC jack
	236	* @nb: Notifier block to unregister
	237	*
	238	* Stop notifying for status changes.
	239	*/
	240	void snd_soc_jack_notifier_unregister(struct snd_soc_jack *jack,
	241	struct notifier_block *nb)
	242	{
	243	blocking_notifier_chain_unregister(&jack->notifier, nb);
	244	}
	245	EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_unregister);
	246
ec67624d LCM	247	#ifdef CONFIG_GPIOLIB
ec67624d LCM	248	/* gpio detect */
26bd7b49	249	static void snd_soc_jack_gpio_detect(struct snd_soc_jack_gpio *gpio)
ec67624d LCM	250	{
	251	struct snd_soc_jack *jack = gpio->jack;
	252	int enable;
	253	int report;
	254
50dfb69d	255	enable = gpiod_get_value_cansleep(gpio->desc);
ec67624d LCM	256	if (gpio->invert)
	257	enable = !enable;
	258
	259	if (enable)
	260	report = gpio->report;
	261	else
	262	report = 0;
	263
c871a053	264	if (gpio->jack_status_check)
cb29d7b9	265	report = gpio->jack_status_check(gpio->data);
c871a053	266
ec67624d LCM	267	snd_soc_jack_report(jack, report, gpio->report);
	268	}
	269
	270	/* irq handler for gpio pin */
	271	static irqreturn_t gpio_handler(int irq, void *data)
	272	{
	273	struct snd_soc_jack_gpio *gpio = data;
97093996	274	struct device *dev = gpio->jack->card->dev;
f9a67059	275
3028eb8c MB	276	trace_snd_soc_jack_irq(gpio->name);
3028eb8c MB	277
f9a67059 MB	278	if (device_may_wakeup(dev))
f9a67059 MB	279	pm_wakeup_event(dev, gpio->debounce_time + 50);
ec67624d	280
e6058aaa	281	queue_delayed_work(system_power_efficient_wq, &gpio->work,
4c14d78e	282	msecs_to_jiffies(gpio->debounce_time));
ec67624d LCM	283
	284	return IRQ_HANDLED;
	285	}
	286
	287	/* gpio work */
	288	static void gpio_work(struct work_struct *work)
	289	{
	290	struct snd_soc_jack_gpio *gpio;
	291
4c14d78e	292	gpio = container_of(work, struct snd_soc_jack_gpio, work.work);
ec67624d LCM	293	snd_soc_jack_gpio_detect(gpio);
	294	}
	295
	296	/**
	297	* snd_soc_jack_add_gpios - Associate GPIO pins with an ASoC jack
	298	*
	299	* @jack: ASoC jack
	300	* @count: number of pins
	301	* @gpios: array of gpio pins
	302	*
	303	* This function will request gpio, set data direction and request irq
	304	* for each gpio in the array.
	305	*/
	306	int snd_soc_jack_add_gpios(struct snd_soc_jack *jack, int count,
	307	struct snd_soc_jack_gpio *gpios)
	308	{
	309	int i, ret;
	310
	311	for (i = 0; i < count; i++) {
ec67624d	312	if (!gpios[i].name) {
97093996	313	dev_err(jack->card->dev,
f025d3b9	314	"ASoC: No name for gpio at index %d\n", i);
ec67624d LCM	315	ret = -EINVAL;
	316	goto undo;
	317	}
	318
e616d2eb DR	319	if (gpios[i].desc) {
	320	/* Already have a GPIO descriptor. */
	321	goto got_gpio;
	322	} else if (gpios[i].gpiod_dev) {
	323	/* Get a GPIO descriptor */
f025d3b9 JN	324	gpios[i].desc = gpiod_get_index(gpios[i].gpiod_dev,
f025d3b9 JN	325	gpios[i].name,
00d647b0	326	gpios[i].idx, GPIOD_IN);
f025d3b9 JN	327	if (IS_ERR(gpios[i].desc)) {
	328	ret = PTR_ERR(gpios[i].desc);
	329	dev_err(gpios[i].gpiod_dev,
	330	"ASoC: Cannot get gpio at index %d: %d",
	331	i, ret);
	332	goto undo;
	333	}
	334	} else {
	335	/* legacy GPIO number */
	336	if (!gpio_is_valid(gpios[i].gpio)) {
97093996	337	dev_err(jack->card->dev,
f025d3b9 JN	338	"ASoC: Invalid gpio %d\n",
	339	gpios[i].gpio);
	340	ret = -EINVAL;
	341	goto undo;
	342	}
	343
00d647b0 AC	344	ret = gpio_request_one(gpios[i].gpio, GPIOF_IN,
00d647b0 AC	345	gpios[i].name);
f025d3b9 JN	346	if (ret)
	347	goto undo;
	348
	349	gpios[i].desc = gpio_to_desc(gpios[i].gpio);
	350	}
e616d2eb	351	got_gpio:
4c14d78e	352	INIT_DELAYED_WORK(&gpios[i].work, gpio_work);
b8e22c1f LPC	353	gpios[i].jack = jack;
b8e22c1f LPC	354
50dfb69d	355	ret = request_any_context_irq(gpiod_to_irq(gpios[i].desc),
3f58fd84 MB	356	gpio_handler,
	357	IRQF_TRIGGER_RISING \|
	358	IRQF_TRIGGER_FALLING,
363618f0	359	gpios[i].name,
3f58fd84	360	&gpios[i]);
d2b4c7bd	361	if (ret < 0)
ec67624d LCM	362	goto err;
ec67624d LCM	363
7887ab3a	364	if (gpios[i].wake) {
50dfb69d	365	ret = irq_set_irq_wake(gpiod_to_irq(gpios[i].desc), 1);
7887ab3a	366	if (ret != 0)
97093996	367	dev_err(jack->card->dev,
f025d3b9 JN	368	"ASoC: Failed to mark GPIO at index %d as wake source: %d\n",
f025d3b9 JN	369	i, ret);
7887ab3a MB	370	}
7887ab3a MB	371
178b699c	372	/* Expose GPIO value over sysfs for diagnostic purposes */
50dfb69d	373	gpiod_export(gpios[i].desc, false);
178b699c	374
178b699c	375	/* Update initial jack status */
f1adf5be	376	schedule_delayed_work(&gpios[i].work,
f1adf5be	377	msecs_to_jiffies(gpios[i].debounce_time));
ec67624d LCM	378	}
	379
	380	return 0;
	381
	382	err:
	383	gpio_free(gpios[i].gpio);
	384	undo:
	385	snd_soc_jack_free_gpios(jack, i, gpios);
	386
	387	return ret;
	388	}
	389	EXPORT_SYMBOL_GPL(snd_soc_jack_add_gpios);
	390
f025d3b9 JN	391	/**
	392	* snd_soc_jack_add_gpiods - Associate GPIO descriptor pins with an ASoC jack
	393	*
	394	* @gpiod_dev: GPIO consumer device
	395	* @jack: ASoC jack
	396	* @count: number of pins
	397	* @gpios: array of gpio pins
	398	*
	399	* This function will request gpio, set data direction and request irq
	400	* for each gpio in the array.
	401	*/
	402	int snd_soc_jack_add_gpiods(struct device *gpiod_dev,
	403	struct snd_soc_jack *jack,
	404	int count, struct snd_soc_jack_gpio *gpios)
	405	{
	406	int i;
	407
	408	for (i = 0; i < count; i++)
	409	gpios[i].gpiod_dev = gpiod_dev;
	410
	411	return snd_soc_jack_add_gpios(jack, count, gpios);
	412	}
	413	EXPORT_SYMBOL_GPL(snd_soc_jack_add_gpiods);
	414
ec67624d LCM	415	/**
	416	* snd_soc_jack_free_gpios - Release GPIO pins' resources of an ASoC jack
	417	*
	418	* @jack: ASoC jack
	419	* @count: number of pins
	420	* @gpios: array of gpio pins
	421	*
	422	* Release gpio and irq resources for gpio pins associated with an ASoC jack.
	423	*/
	424	void snd_soc_jack_free_gpios(struct snd_soc_jack *jack, int count,
	425	struct snd_soc_jack_gpio *gpios)
	426	{
	427	int i;
	428
	429	for (i = 0; i < count; i++) {
50dfb69d JN	430	gpiod_unexport(gpios[i].desc);
50dfb69d JN	431	free_irq(gpiod_to_irq(gpios[i].desc), &gpios[i]);
4c14d78e	432	cancel_delayed_work_sync(&gpios[i].work);
50dfb69d	433	gpiod_put(gpios[i].desc);
ec67624d LCM	434	gpios[i].jack = NULL;
	435	}
	436	}
	437	EXPORT_SYMBOL_GPL(snd_soc_jack_free_gpios);
	438	#endif /* CONFIG_GPIOLIB */