[linux-2.6-block.git] / sound / core / jack.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Jack abstraction layer
 *
 *  Copyright 2008 Wolfson Microelectronics
 */

#include <linux/input.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <sound/jack.h>
#include <sound/core.h>
#include <sound/control.h>

struct snd_jack_kctl {
	struct snd_kcontrol *kctl;
	struct list_head list;  /* list of controls belong to the same jack */
	unsigned int mask_bits; /* only masked status bits are reported via kctl */
};

#ifdef CONFIG_SND_JACK_INPUT_DEV
static int jack_switch_types[SND_JACK_SWITCH_TYPES] = {
	SW_HEADPHONE_INSERT,
	SW_MICROPHONE_INSERT,
	SW_LINEOUT_INSERT,
	SW_JACK_PHYSICAL_INSERT,
	SW_VIDEOOUT_INSERT,
	SW_LINEIN_INSERT,
};
#endif /* CONFIG_SND_JACK_INPUT_DEV */

static int snd_jack_dev_disconnect(struct snd_device *device)
{
#ifdef CONFIG_SND_JACK_INPUT_DEV
	struct snd_jack *jack = device->device_data;

	if (!jack->input_dev)
		return 0;

	/* If the input device is registered with the input subsystem
	 * then we need to use a different deallocator. */
	if (jack->registered)
		input_unregister_device(jack->input_dev);
	else
		input_free_device(jack->input_dev);
	jack->input_dev = NULL;
#endif /* CONFIG_SND_JACK_INPUT_DEV */
	return 0;
}

static int snd_jack_dev_free(struct snd_device *device)
{
	struct snd_jack *jack = device->device_data;
	struct snd_card *card = device->card;
	struct snd_jack_kctl *jack_kctl, *tmp_jack_kctl;

	list_for_each_entry_safe(jack_kctl, tmp_jack_kctl, &jack->kctl_list, list) {
		list_del_init(&jack_kctl->list);
		snd_ctl_remove(card, jack_kctl->kctl);
	}
	if (jack->private_free)
		jack->private_free(jack);

	snd_jack_dev_disconnect(device);

	kfree(jack->id);
	kfree(jack);

	return 0;
}

#ifdef CONFIG_SND_JACK_INPUT_DEV
static int snd_jack_dev_register(struct snd_device *device)
{
	struct snd_jack *jack = device->device_data;
	struct snd_card *card = device->card;
	int err, i;

	snprintf(jack->name, sizeof(jack->name), "%s %s",
		 card->shortname, jack->id);

	if (!jack->input_dev)
		return 0;

	jack->input_dev->name = jack->name;

	/* Default to the sound card device. */
	if (!jack->input_dev->dev.parent)
		jack->input_dev->dev.parent = snd_card_get_device_link(card);

	/* Add capabilities for any keys that are enabled */
	for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
		int testbit = SND_JACK_BTN_0 >> i;

		if (!(jack->type & testbit))
			continue;

		if (!jack->key[i])
			jack->key[i] = BTN_0 + i;

		input_set_capability(jack->input_dev, EV_KEY, jack->key[i]);
	}

	err = input_register_device(jack->input_dev);
	if (err == 0)
		jack->registered = 1;

	return err;
}
#endif /* CONFIG_SND_JACK_INPUT_DEV */

static void snd_jack_kctl_private_free(struct snd_kcontrol *kctl)
{
	struct snd_jack_kctl *jack_kctl;

	jack_kctl = kctl->private_data;
	if (jack_kctl) {
		list_del(&jack_kctl->list);
		kfree(jack_kctl);
	}
}

static void snd_jack_kctl_add(struct snd_jack *jack, struct snd_jack_kctl *jack_kctl)
{
	list_add_tail(&jack_kctl->list, &jack->kctl_list);
}

static struct snd_jack_kctl * snd_jack_kctl_new(struct snd_card *card, const char *name, unsigned int mask)
{
	struct snd_kcontrol *kctl;
	struct snd_jack_kctl *jack_kctl;
	int err;

	kctl = snd_kctl_jack_new(name, card);
	if (!kctl)
		return NULL;

	err = snd_ctl_add(card, kctl);
	if (err < 0)
		return NULL;

	jack_kctl = kzalloc(sizeof(*jack_kctl), GFP_KERNEL);

	if (!jack_kctl)
		goto error;

	jack_kctl->kctl = kctl;
	jack_kctl->mask_bits = mask;

	kctl->private_data = jack_kctl;
	kctl->private_free = snd_jack_kctl_private_free;

	return jack_kctl;
error:
	snd_ctl_free_one(kctl);
	return NULL;
}

/**
 * snd_jack_add_new_kctl - Create a new snd_jack_kctl and add it to jack
 * @jack:  the jack instance which the kctl will attaching to
 * @name:  the name for the snd_kcontrol object
 * @mask:  a bitmask of enum snd_jack_type values that can be detected
 *         by this snd_jack_kctl object.
 *
 * Creates a new snd_kcontrol object and adds it to the jack kctl_list.
 *
 * Return: Zero if successful, or a negative error code on failure.
 */
int snd_jack_add_new_kctl(struct snd_jack *jack, const char * name, int mask)
{
	struct snd_jack_kctl *jack_kctl;

	jack_kctl = snd_jack_kctl_new(jack->card, name, mask);
	if (!jack_kctl)
		return -ENOMEM;

	snd_jack_kctl_add(jack, jack_kctl);
	return 0;
}
EXPORT_SYMBOL(snd_jack_add_new_kctl);

/**
 * snd_jack_new - Create a new jack
 * @card:  the card instance
 * @id:    an identifying string for this jack
 * @type:  a bitmask of enum snd_jack_type values that can be detected by
 *         this jack
 * @jjack: Used to provide the allocated jack object to the caller.
 * @initial_kctl: if true, create a kcontrol and add it to the jack list.
 * @phantom_jack: Don't create a input device for phantom jacks.
 *
 * Creates a new jack object.
 *
 * Return: Zero if successful, or a negative error code on failure.
 * On success @jjack will be initialised.
 */
int snd_jack_new(struct snd_card *card, const char *id, int type,
		 struct snd_jack **jjack, bool initial_kctl, bool phantom_jack)
{
	struct snd_jack *jack;
	struct snd_jack_kctl *jack_kctl = NULL;
	int err;
	static struct snd_device_ops ops = {
		.dev_free = snd_jack_dev_free,
#ifdef CONFIG_SND_JACK_INPUT_DEV
		.dev_register = snd_jack_dev_register,
		.dev_disconnect = snd_jack_dev_disconnect,
#endif /* CONFIG_SND_JACK_INPUT_DEV */
	};

	if (initial_kctl) {
		jack_kctl = snd_jack_kctl_new(card, id, type);
		if (!jack_kctl)
			return -ENOMEM;
	}

	jack = kzalloc(sizeof(struct snd_jack), GFP_KERNEL);
	if (jack == NULL)
		return -ENOMEM;

	jack->id = kstrdup(id, GFP_KERNEL);

	/* don't creat input device for phantom jack */
	if (!phantom_jack) {
#ifdef CONFIG_SND_JACK_INPUT_DEV
		int i;

		jack->input_dev = input_allocate_device();
		if (jack->input_dev == NULL) {
			err = -ENOMEM;
			goto fail_input;
		}

		jack->input_dev->phys = "ALSA";

		jack->type = type;

		for (i = 0; i < SND_JACK_SWITCH_TYPES; i++)
			if (type & (1 << i))
				input_set_capability(jack->input_dev, EV_SW,
						     jack_switch_types[i]);

#endif /* CONFIG_SND_JACK_INPUT_DEV */
	}

	err = snd_device_new(card, SNDRV_DEV_JACK, jack, &ops);
	if (err < 0)
		goto fail_input;

	jack->card = card;
	INIT_LIST_HEAD(&jack->kctl_list);

	if (initial_kctl)
		snd_jack_kctl_add(jack, jack_kctl);

	*jjack = jack;

	return 0;

fail_input:
#ifdef CONFIG_SND_JACK_INPUT_DEV
	input_free_device(jack->input_dev);
#endif
	kfree(jack->id);
	kfree(jack);
	return err;
}
EXPORT_SYMBOL(snd_jack_new);

#ifdef CONFIG_SND_JACK_INPUT_DEV
/**
 * snd_jack_set_parent - Set the parent device for a jack
 *
 * @jack:   The jack to configure
 * @parent: The device to set as parent for the jack.
 *
 * Set the parent for the jack devices in the device tree.  This
 * function is only valid prior to registration of the jack.  If no
 * parent is configured then the parent device will be the sound card.
 */
void snd_jack_set_parent(struct snd_jack *jack, struct device *parent)
{
	WARN_ON(jack->registered);
	if (!jack->input_dev)
		return;

	jack->input_dev->dev.parent = parent;
}
EXPORT_SYMBOL(snd_jack_set_parent);

/**
 * snd_jack_set_key - Set a key mapping on a jack
 *
 * @jack:    The jack to configure
 * @type:    Jack report type for this key
 * @keytype: Input layer key type to be reported
 *
 * Map a SND_JACK_BTN_* button type to an input layer key, allowing
 * reporting of keys on accessories via the jack abstraction.  If no
 * mapping is provided but keys are enabled in the jack type then
 * BTN_n numeric buttons will be reported.
 *
 * If jacks are not reporting via the input API this call will have no
 * effect.
 *
 * Note that this is intended to be use by simple devices with small
 * numbers of keys that can be reported.  It is also possible to
 * access the input device directly - devices with complex input
 * capabilities on accessories should consider doing this rather than
 * using this abstraction.
 *
 * This function may only be called prior to registration of the jack.
 *
 * Return: Zero if successful, or a negative error code on failure.
 */
int snd_jack_set_key(struct snd_jack *jack, enum snd_jack_types type,
		     int keytype)
{
	int key = fls(SND_JACK_BTN_0) - fls(type);

	WARN_ON(jack->registered);

	if (!keytype || key >= ARRAY_SIZE(jack->key))
		return -EINVAL;

	jack->type |= type;
	jack->key[key] = keytype;
	return 0;
}
EXPORT_SYMBOL(snd_jack_set_key);
#endif /* CONFIG_SND_JACK_INPUT_DEV */

/**
 * snd_jack_report - Report the current status of a jack
 *
 * @jack:   The jack to report status for
 * @status: The current status of the jack
 */
void snd_jack_report(struct snd_jack *jack, int status)
{
	struct snd_jack_kctl *jack_kctl;
#ifdef CONFIG_SND_JACK_INPUT_DEV
	int i;
#endif

	if (!jack)
		return;

	list_for_each_entry(jack_kctl, &jack->kctl_list, list)
		snd_kctl_jack_report(jack->card, jack_kctl->kctl,
					    status & jack_kctl->mask_bits);

#ifdef CONFIG_SND_JACK_INPUT_DEV
	if (!jack->input_dev)
		return;

	for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
		int testbit = SND_JACK_BTN_0 >> i;

		if (jack->type & testbit)
			input_report_key(jack->input_dev, jack->key[i],
					 status & testbit);
	}

	for (i = 0; i < ARRAY_SIZE(jack_switch_types); i++) {
		int testbit = 1 << i;
		if (jack->type & testbit)
			input_report_switch(jack->input_dev,
					    jack_switch_types[i],
					    status & testbit);
	}

	input_sync(jack->input_dev);
#endif /* CONFIG_SND_JACK_INPUT_DEV */
}
EXPORT_SYMBOL(snd_jack_report);
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
e76d8cea MB	2	/*
	3	* Jack abstraction layer
	4	*
	5	* Copyright 2008 Wolfson Microelectronics
e76d8cea MB	6	*/
	7
	8	#include <linux/input.h>
5a0e3ad6	9	#include <linux/slab.h>
da155d5b	10	#include <linux/module.h>
e76d8cea MB	11	#include <sound/jack.h>
e76d8cea MB	12	#include <sound/core.h>
9058cbe1 JY	13	#include <sound/control.h>
	14
	15	struct snd_jack_kctl {
	16	struct snd_kcontrol *kctl;
	17	struct list_head list; /* list of controls belong to the same jack */
	18	unsigned int mask_bits; /* only masked status bits are reported via kctl */
	19	};
e76d8cea	20
fe0d128c	21	#ifdef CONFIG_SND_JACK_INPUT_DEV
53803aea	22	static int jack_switch_types[SND_JACK_SWITCH_TYPES] = {
bd8a71a7 MB	23	SW_HEADPHONE_INSERT,
	24	SW_MICROPHONE_INSERT,
	25	SW_LINEOUT_INSERT,
	26	SW_JACK_PHYSICAL_INSERT,
d506fc32	27	SW_VIDEOOUT_INSERT,
7c2f8e40	28	SW_LINEIN_INSERT,
bd8a71a7	29	};
fe0d128c	30	#endif /* CONFIG_SND_JACK_INPUT_DEV */
bd8a71a7	31
32b85442	32	static int snd_jack_dev_disconnect(struct snd_device *device)
e76d8cea	33	{
fe0d128c	34	#ifdef CONFIG_SND_JACK_INPUT_DEV
e76d8cea MB	35	struct snd_jack *jack = device->device_data;
e76d8cea MB	36
32b85442 TI	37	if (!jack->input_dev)
32b85442 TI	38	return 0;
9d59065c	39
e76d8cea MB	40	/* If the input device is registered with the input subsystem
	41	* then we need to use a different deallocator. */
	42	if (jack->registered)
	43	input_unregister_device(jack->input_dev);
	44	else
	45	input_free_device(jack->input_dev);
32b85442	46	jack->input_dev = NULL;
fe0d128c	47	#endif /* CONFIG_SND_JACK_INPUT_DEV */
32b85442 TI	48	return 0;
	49	}
	50
	51	static int snd_jack_dev_free(struct snd_device *device)
	52	{
	53	struct snd_jack *jack = device->device_data;
9058cbe1 JY	54	struct snd_card *card = device->card;
9058cbe1 JY	55	struct snd_jack_kctl jack_kctl, tmp_jack_kctl;
32b85442	56
9058cbe1 JY	57	list_for_each_entry_safe(jack_kctl, tmp_jack_kctl, &jack->kctl_list, list) {
	58	list_del_init(&jack_kctl->list);
	59	snd_ctl_remove(card, jack_kctl->kctl);
	60	}
32b85442 TI	61	if (jack->private_free)
	62	jack->private_free(jack);
	63
	64	snd_jack_dev_disconnect(device);
e76d8cea	65
282cd76f	66	kfree(jack->id);
e76d8cea MB	67	kfree(jack);
	68
	69	return 0;
	70	}
	71
fe0d128c	72	#ifdef CONFIG_SND_JACK_INPUT_DEV
e76d8cea MB	73	static int snd_jack_dev_register(struct snd_device *device)
	74	{
	75	struct snd_jack *jack = device->device_data;
	76	struct snd_card *card = device->card;
ebb812cb	77	int err, i;
e76d8cea MB	78
e76d8cea MB	79	snprintf(jack->name, sizeof(jack->name), "%s %s",
2678f60d	80	card->shortname, jack->id);
43b2cd54 TI	81
	82	if (!jack->input_dev)
	83	return 0;
	84
e76d8cea MB	85	jack->input_dev->name = jack->name;
	86
	87	/* Default to the sound card device. */
	88	if (!jack->input_dev->dev.parent)
1f3fff7b	89	jack->input_dev->dev.parent = snd_card_get_device_link(card);
e76d8cea	90
ebb812cb MB	91	/* Add capabilities for any keys that are enabled */
	92	for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
	93	int testbit = SND_JACK_BTN_0 >> i;
	94
	95	if (!(jack->type & testbit))
	96	continue;
	97
	98	if (!jack->key[i])
	99	jack->key[i] = BTN_0 + i;
	100
	101	input_set_capability(jack->input_dev, EV_KEY, jack->key[i]);
	102	}
	103
e76d8cea MB	104	err = input_register_device(jack->input_dev);
	105	if (err == 0)
	106	jack->registered = 1;
	107
	108	return err;
	109	}
fe0d128c	110	#endif /* CONFIG_SND_JACK_INPUT_DEV */
e76d8cea	111
9058cbe1 JY	112	static void snd_jack_kctl_private_free(struct snd_kcontrol *kctl)
	113	{
	114	struct snd_jack_kctl *jack_kctl;
	115
	116	jack_kctl = kctl->private_data;
	117	if (jack_kctl) {
	118	list_del(&jack_kctl->list);
	119	kfree(jack_kctl);
	120	}
	121	}
	122
	123	static void snd_jack_kctl_add(struct snd_jack jack, struct snd_jack_kctl jack_kctl)
	124	{
	125	list_add_tail(&jack_kctl->list, &jack->kctl_list);
	126	}
	127
	128	static struct snd_jack_kctl * snd_jack_kctl_new(struct snd_card card, const char name, unsigned int mask)
	129	{
	130	struct snd_kcontrol *kctl;
	131	struct snd_jack_kctl *jack_kctl;
	132	int err;
	133
2ba2dfa1	134	kctl = snd_kctl_jack_new(name, card);
9058cbe1 JY	135	if (!kctl)
	136	return NULL;
	137
	138	err = snd_ctl_add(card, kctl);
	139	if (err < 0)
	140	return NULL;
	141
	142	jack_kctl = kzalloc(sizeof(*jack_kctl), GFP_KERNEL);
	143
	144	if (!jack_kctl)
	145	goto error;
	146
	147	jack_kctl->kctl = kctl;
	148	jack_kctl->mask_bits = mask;
	149
	150	kctl->private_data = jack_kctl;
	151	kctl->private_free = snd_jack_kctl_private_free;
	152
	153	return jack_kctl;
	154	error:
	155	snd_ctl_free_one(kctl);
	156	return NULL;
	157	}
	158
	159	/**
	160	* snd_jack_add_new_kctl - Create a new snd_jack_kctl and add it to jack
	161	* @jack: the jack instance which the kctl will attaching to
	162	* @name: the name for the snd_kcontrol object
	163	* @mask: a bitmask of enum snd_jack_type values that can be detected
	164	* by this snd_jack_kctl object.
	165	*
	166	* Creates a new snd_kcontrol object and adds it to the jack kctl_list.
	167	*
	168	* Return: Zero if successful, or a negative error code on failure.
	169	*/
	170	int snd_jack_add_new_kctl(struct snd_jack jack, const char name, int mask)
	171	{
	172	struct snd_jack_kctl *jack_kctl;
	173
	174	jack_kctl = snd_jack_kctl_new(jack->card, name, mask);
	175	if (!jack_kctl)
	176	return -ENOMEM;
	177
	178	snd_jack_kctl_add(jack, jack_kctl);
	179	return 0;
	180	}
	181	EXPORT_SYMBOL(snd_jack_add_new_kctl);
	182
e76d8cea MB	183	/**
	184	* snd_jack_new - Create a new jack
	185	* @card: the card instance
	186	* @id: an identifying string for this jack
	187	* @type: a bitmask of enum snd_jack_type values that can be detected by
	188	* this jack
	189	* @jjack: Used to provide the allocated jack object to the caller.
4e3f0dc6 JY	190	* @initial_kctl: if true, create a kcontrol and add it to the jack list.
4e3f0dc6 JY	191	* @phantom_jack: Don't create a input device for phantom jacks.
e76d8cea MB	192	*
	193	* Creates a new jack object.
	194	*
eb7c06e8 YB	195	* Return: Zero if successful, or a negative error code on failure.
eb7c06e8 YB	196	* On success @jjack will be initialised.
e76d8cea MB	197	*/
e76d8cea MB	198	int snd_jack_new(struct snd_card card, const char id, int type,
4e3f0dc6	199	struct snd_jack **jjack, bool initial_kctl, bool phantom_jack)
e76d8cea MB	200	{
e76d8cea MB	201	struct snd_jack *jack;
4e3f0dc6	202	struct snd_jack_kctl *jack_kctl = NULL;
e76d8cea MB	203	int err;
	204	static struct snd_device_ops ops = {
	205	.dev_free = snd_jack_dev_free,
fe0d128c	206	#ifdef CONFIG_SND_JACK_INPUT_DEV
e76d8cea	207	.dev_register = snd_jack_dev_register,
32b85442	208	.dev_disconnect = snd_jack_dev_disconnect,
fe0d128c	209	#endif /* CONFIG_SND_JACK_INPUT_DEV */
e76d8cea MB	210	};
e76d8cea MB	211
4e3f0dc6 JY	212	if (initial_kctl) {
	213	jack_kctl = snd_jack_kctl_new(card, id, type);
	214	if (!jack_kctl)
	215	return -ENOMEM;
	216	}
	217
e76d8cea MB	218	jack = kzalloc(sizeof(struct snd_jack), GFP_KERNEL);
	219	if (jack == NULL)
	220	return -ENOMEM;
	221
282cd76f	222	jack->id = kstrdup(id, GFP_KERNEL);
e76d8cea	223
4e3f0dc6 JY	224	/* don't creat input device for phantom jack */
4e3f0dc6 JY	225	if (!phantom_jack) {
fe0d128c TI	226	#ifdef CONFIG_SND_JACK_INPUT_DEV
	227	int i;
	228
4e3f0dc6 JY	229	jack->input_dev = input_allocate_device();
	230	if (jack->input_dev == NULL) {
	231	err = -ENOMEM;
	232	goto fail_input;
	233	}
e76d8cea	234
4e3f0dc6	235	jack->input_dev->phys = "ALSA";
e76d8cea	236
4e3f0dc6	237	jack->type = type;
e76d8cea	238
4e3f0dc6 JY	239	for (i = 0; i < SND_JACK_SWITCH_TYPES; i++)
	240	if (type & (1 << i))
	241	input_set_capability(jack->input_dev, EV_SW,
	242	jack_switch_types[i]);
	243
fe0d128c	244	#endif /* CONFIG_SND_JACK_INPUT_DEV */
4e3f0dc6	245	}
e76d8cea MB	246
	247	err = snd_device_new(card, SNDRV_DEV_JACK, jack, &ops);
	248	if (err < 0)
	249	goto fail_input;
	250
9058cbe1 JY	251	jack->card = card;
	252	INIT_LIST_HEAD(&jack->kctl_list);
	253
4e3f0dc6 JY	254	if (initial_kctl)
	255	snd_jack_kctl_add(jack, jack_kctl);
	256
e76d8cea MB	257	*jjack = jack;
	258
	259	return 0;
	260
	261	fail_input:
fe0d128c	262	#ifdef CONFIG_SND_JACK_INPUT_DEV
e76d8cea	263	input_free_device(jack->input_dev);
fe0d128c	264	#endif
eeda276b	265	kfree(jack->id);
e76d8cea MB	266	kfree(jack);
	267	return err;
	268	}
	269	EXPORT_SYMBOL(snd_jack_new);
	270
fe0d128c	271	#ifdef CONFIG_SND_JACK_INPUT_DEV
e76d8cea MB	272	/**
	273	* snd_jack_set_parent - Set the parent device for a jack
	274	*
	275	* @jack: The jack to configure
	276	* @parent: The device to set as parent for the jack.
	277	*
a2e888f0	278	* Set the parent for the jack devices in the device tree. This
e76d8cea MB	279	* function is only valid prior to registration of the jack. If no
	280	* parent is configured then the parent device will be the sound card.
	281	*/
	282	void snd_jack_set_parent(struct snd_jack jack, struct device parent)
	283	{
	284	WARN_ON(jack->registered);
43b2cd54 TI	285	if (!jack->input_dev)
43b2cd54 TI	286	return;
e76d8cea MB	287
	288	jack->input_dev->dev.parent = parent;
	289	}
	290	EXPORT_SYMBOL(snd_jack_set_parent);
	291
ebb812cb MB	292	/**
	293	* snd_jack_set_key - Set a key mapping on a jack
	294	*
	295	* @jack: The jack to configure
	296	* @type: Jack report type for this key
	297	* @keytype: Input layer key type to be reported
	298	*
3f1185d6	299	* Map a SND_JACK_BTN_* button type to an input layer key, allowing
ebb812cb MB	300	* reporting of keys on accessories via the jack abstraction. If no
	301	* mapping is provided but keys are enabled in the jack type then
	302	* BTN_n numeric buttons will be reported.
	303	*
a2e888f0 MB	304	* If jacks are not reporting via the input API this call will have no
	305	* effect.
	306	*
ebb812cb MB	307	* Note that this is intended to be use by simple devices with small
	308	* numbers of keys that can be reported. It is also possible to
	309	* access the input device directly - devices with complex input
	310	* capabilities on accessories should consider doing this rather than
	311	* using this abstraction.
	312	*
	313	* This function may only be called prior to registration of the jack.
eb7c06e8 YB	314	*
eb7c06e8 YB	315	* Return: Zero if successful, or a negative error code on failure.
ebb812cb MB	316	*/
	317	int snd_jack_set_key(struct snd_jack *jack, enum snd_jack_types type,
	318	int keytype)
	319	{
	320	int key = fls(SND_JACK_BTN_0) - fls(type);
	321
	322	WARN_ON(jack->registered);
	323
	324	if (!keytype \|\| key >= ARRAY_SIZE(jack->key))
	325	return -EINVAL;
	326
	327	jack->type \|= type;
	328	jack->key[key] = keytype;
ebb812cb MB	329	return 0;
	330	}
	331	EXPORT_SYMBOL(snd_jack_set_key);
fe0d128c	332	#endif /* CONFIG_SND_JACK_INPUT_DEV */
ebb812cb	333
e76d8cea MB	334	/**
	335	* snd_jack_report - Report the current status of a jack
	336	*
	337	* @jack: The jack to report status for
	338	* @status: The current status of the jack
	339	*/
	340	void snd_jack_report(struct snd_jack *jack, int status)
	341	{
9058cbe1	342	struct snd_jack_kctl *jack_kctl;
fe0d128c	343	#ifdef CONFIG_SND_JACK_INPUT_DEV
bd8a71a7	344	int i;
fe0d128c	345	#endif
bd8a71a7	346
9a3f371e MB	347	if (!jack)
	348	return;
	349
6ed9495e JY	350	list_for_each_entry(jack_kctl, &jack->kctl_list, list)
	351	snd_kctl_jack_report(jack->card, jack_kctl->kctl,
	352	status & jack_kctl->mask_bits);
	353
fe0d128c	354	#ifdef CONFIG_SND_JACK_INPUT_DEV
6ed9495e JY	355	if (!jack->input_dev)
	356	return;
	357
ebb812cb MB	358	for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
	359	int testbit = SND_JACK_BTN_0 >> i;
	360
	361	if (jack->type & testbit)
	362	input_report_key(jack->input_dev, jack->key[i],
	363	status & testbit);
	364	}
	365
1c6e555c	366	for (i = 0; i < ARRAY_SIZE(jack_switch_types); i++) {
bd8a71a7 MB	367	int testbit = 1 << i;
bd8a71a7 MB	368	if (jack->type & testbit)
1c6e555c MB	369	input_report_switch(jack->input_dev,
1c6e555c MB	370	jack_switch_types[i],
bd8a71a7 MB	371	status & testbit);
bd8a71a7 MB	372	}
e76d8cea MB	373
e76d8cea MB	374	input_sync(jack->input_dev);
fe0d128c	375	#endif /* CONFIG_SND_JACK_INPUT_DEV */
e76d8cea MB	376	}
e76d8cea MB	377	EXPORT_SYMBOL(snd_jack_report);