[linux.git] / sound / core / jack.c

/*
 *  Jack abstraction layer
 *
 *  Copyright 2008 Wolfson Microelectronics
 *
 *   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.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#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
e76d8cea MB	1	/*
	2	* Jack abstraction layer
	3	*
	4	* Copyright 2008 Wolfson Microelectronics
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
	21
	22	#include <linux/input.h>
5a0e3ad6	23	#include <linux/slab.h>
da155d5b	24	#include <linux/module.h>
e76d8cea MB	25	#include <sound/jack.h>
e76d8cea MB	26	#include <sound/core.h>
9058cbe1 JY	27	#include <sound/control.h>
	28
	29	struct snd_jack_kctl {
	30	struct snd_kcontrol *kctl;
	31	struct list_head list; /* list of controls belong to the same jack */
	32	unsigned int mask_bits; /* only masked status bits are reported via kctl */
	33	};
e76d8cea	34
fe0d128c	35	#ifdef CONFIG_SND_JACK_INPUT_DEV
53803aea	36	static int jack_switch_types[SND_JACK_SWITCH_TYPES] = {
bd8a71a7 MB	37	SW_HEADPHONE_INSERT,
	38	SW_MICROPHONE_INSERT,
	39	SW_LINEOUT_INSERT,
	40	SW_JACK_PHYSICAL_INSERT,
d506fc32	41	SW_VIDEOOUT_INSERT,
7c2f8e40	42	SW_LINEIN_INSERT,
bd8a71a7	43	};
fe0d128c	44	#endif /* CONFIG_SND_JACK_INPUT_DEV */
bd8a71a7	45
32b85442	46	static int snd_jack_dev_disconnect(struct snd_device *device)
e76d8cea	47	{
fe0d128c	48	#ifdef CONFIG_SND_JACK_INPUT_DEV
e76d8cea MB	49	struct snd_jack *jack = device->device_data;
e76d8cea MB	50
32b85442 TI	51	if (!jack->input_dev)
32b85442 TI	52	return 0;
9d59065c	53
e76d8cea MB	54	/* If the input device is registered with the input subsystem
	55	* then we need to use a different deallocator. */
	56	if (jack->registered)
	57	input_unregister_device(jack->input_dev);
	58	else
	59	input_free_device(jack->input_dev);
32b85442	60	jack->input_dev = NULL;
fe0d128c	61	#endif /* CONFIG_SND_JACK_INPUT_DEV */
32b85442 TI	62	return 0;
	63	}
	64
	65	static int snd_jack_dev_free(struct snd_device *device)
	66	{
	67	struct snd_jack *jack = device->device_data;
9058cbe1 JY	68	struct snd_card *card = device->card;
9058cbe1 JY	69	struct snd_jack_kctl jack_kctl, tmp_jack_kctl;
32b85442	70
9058cbe1 JY	71	list_for_each_entry_safe(jack_kctl, tmp_jack_kctl, &jack->kctl_list, list) {
	72	list_del_init(&jack_kctl->list);
	73	snd_ctl_remove(card, jack_kctl->kctl);
	74	}
32b85442 TI	75	if (jack->private_free)
	76	jack->private_free(jack);
	77
	78	snd_jack_dev_disconnect(device);
e76d8cea	79
282cd76f	80	kfree(jack->id);
e76d8cea MB	81	kfree(jack);
	82
	83	return 0;
	84	}
	85
fe0d128c	86	#ifdef CONFIG_SND_JACK_INPUT_DEV
e76d8cea MB	87	static int snd_jack_dev_register(struct snd_device *device)
	88	{
	89	struct snd_jack *jack = device->device_data;
	90	struct snd_card *card = device->card;
ebb812cb	91	int err, i;
e76d8cea MB	92
e76d8cea MB	93	snprintf(jack->name, sizeof(jack->name), "%s %s",
2678f60d	94	card->shortname, jack->id);
43b2cd54 TI	95
	96	if (!jack->input_dev)
	97	return 0;
	98
e76d8cea MB	99	jack->input_dev->name = jack->name;
	100
	101	/* Default to the sound card device. */
	102	if (!jack->input_dev->dev.parent)
1f3fff7b	103	jack->input_dev->dev.parent = snd_card_get_device_link(card);
e76d8cea	104
ebb812cb MB	105	/* Add capabilities for any keys that are enabled */
	106	for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
	107	int testbit = SND_JACK_BTN_0 >> i;
	108
	109	if (!(jack->type & testbit))
	110	continue;
	111
	112	if (!jack->key[i])
	113	jack->key[i] = BTN_0 + i;
	114
	115	input_set_capability(jack->input_dev, EV_KEY, jack->key[i]);
	116	}
	117
e76d8cea MB	118	err = input_register_device(jack->input_dev);
	119	if (err == 0)
	120	jack->registered = 1;
	121
	122	return err;
	123	}
fe0d128c	124	#endif /* CONFIG_SND_JACK_INPUT_DEV */
e76d8cea	125
9058cbe1 JY	126	static void snd_jack_kctl_private_free(struct snd_kcontrol *kctl)
	127	{
	128	struct snd_jack_kctl *jack_kctl;
	129
	130	jack_kctl = kctl->private_data;
	131	if (jack_kctl) {
	132	list_del(&jack_kctl->list);
	133	kfree(jack_kctl);
	134	}
	135	}
	136
	137	static void snd_jack_kctl_add(struct snd_jack jack, struct snd_jack_kctl jack_kctl)
	138	{
	139	list_add_tail(&jack_kctl->list, &jack->kctl_list);
	140	}
	141
	142	static struct snd_jack_kctl * snd_jack_kctl_new(struct snd_card card, const char name, unsigned int mask)
	143	{
	144	struct snd_kcontrol *kctl;
	145	struct snd_jack_kctl *jack_kctl;
	146	int err;
	147
2ba2dfa1	148	kctl = snd_kctl_jack_new(name, card);
9058cbe1 JY	149	if (!kctl)
	150	return NULL;
	151
	152	err = snd_ctl_add(card, kctl);
	153	if (err < 0)
	154	return NULL;
	155
	156	jack_kctl = kzalloc(sizeof(*jack_kctl), GFP_KERNEL);
	157
	158	if (!jack_kctl)
	159	goto error;
	160
	161	jack_kctl->kctl = kctl;
	162	jack_kctl->mask_bits = mask;
	163
	164	kctl->private_data = jack_kctl;
	165	kctl->private_free = snd_jack_kctl_private_free;
	166
	167	return jack_kctl;
	168	error:
	169	snd_ctl_free_one(kctl);
	170	return NULL;
	171	}
	172
	173	/**
	174	* snd_jack_add_new_kctl - Create a new snd_jack_kctl and add it to jack
	175	* @jack: the jack instance which the kctl will attaching to
	176	* @name: the name for the snd_kcontrol object
	177	* @mask: a bitmask of enum snd_jack_type values that can be detected
	178	* by this snd_jack_kctl object.
	179	*
	180	* Creates a new snd_kcontrol object and adds it to the jack kctl_list.
	181	*
	182	* Return: Zero if successful, or a negative error code on failure.
	183	*/
	184	int snd_jack_add_new_kctl(struct snd_jack jack, const char name, int mask)
	185	{
	186	struct snd_jack_kctl *jack_kctl;
	187
	188	jack_kctl = snd_jack_kctl_new(jack->card, name, mask);
	189	if (!jack_kctl)
	190	return -ENOMEM;
	191
	192	snd_jack_kctl_add(jack, jack_kctl);
	193	return 0;
	194	}
	195	EXPORT_SYMBOL(snd_jack_add_new_kctl);
	196
e76d8cea MB	197	/**
	198	* snd_jack_new - Create a new jack
	199	* @card: the card instance
	200	* @id: an identifying string for this jack
	201	* @type: a bitmask of enum snd_jack_type values that can be detected by
	202	* this jack
	203	* @jjack: Used to provide the allocated jack object to the caller.
4e3f0dc6 JY	204	* @initial_kctl: if true, create a kcontrol and add it to the jack list.
4e3f0dc6 JY	205	* @phantom_jack: Don't create a input device for phantom jacks.
e76d8cea MB	206	*
	207	* Creates a new jack object.
	208	*
eb7c06e8 YB	209	* Return: Zero if successful, or a negative error code on failure.
eb7c06e8 YB	210	* On success @jjack will be initialised.
e76d8cea MB	211	*/
e76d8cea MB	212	int snd_jack_new(struct snd_card card, const char id, int type,
4e3f0dc6	213	struct snd_jack **jjack, bool initial_kctl, bool phantom_jack)
e76d8cea MB	214	{
e76d8cea MB	215	struct snd_jack *jack;
4e3f0dc6	216	struct snd_jack_kctl *jack_kctl = NULL;
e76d8cea MB	217	int err;
	218	static struct snd_device_ops ops = {
	219	.dev_free = snd_jack_dev_free,
fe0d128c	220	#ifdef CONFIG_SND_JACK_INPUT_DEV
e76d8cea	221	.dev_register = snd_jack_dev_register,
32b85442	222	.dev_disconnect = snd_jack_dev_disconnect,
fe0d128c	223	#endif /* CONFIG_SND_JACK_INPUT_DEV */
e76d8cea MB	224	};
e76d8cea MB	225
4e3f0dc6 JY	226	if (initial_kctl) {
	227	jack_kctl = snd_jack_kctl_new(card, id, type);
	228	if (!jack_kctl)
	229	return -ENOMEM;
	230	}
	231
e76d8cea MB	232	jack = kzalloc(sizeof(struct snd_jack), GFP_KERNEL);
	233	if (jack == NULL)
	234	return -ENOMEM;
	235
282cd76f	236	jack->id = kstrdup(id, GFP_KERNEL);
e76d8cea	237
4e3f0dc6 JY	238	/* don't creat input device for phantom jack */
4e3f0dc6 JY	239	if (!phantom_jack) {
fe0d128c TI	240	#ifdef CONFIG_SND_JACK_INPUT_DEV
	241	int i;
	242
4e3f0dc6 JY	243	jack->input_dev = input_allocate_device();
	244	if (jack->input_dev == NULL) {
	245	err = -ENOMEM;
	246	goto fail_input;
	247	}
e76d8cea	248
4e3f0dc6	249	jack->input_dev->phys = "ALSA";
e76d8cea	250
4e3f0dc6	251	jack->type = type;
e76d8cea	252
4e3f0dc6 JY	253	for (i = 0; i < SND_JACK_SWITCH_TYPES; i++)
	254	if (type & (1 << i))
	255	input_set_capability(jack->input_dev, EV_SW,
	256	jack_switch_types[i]);
	257
fe0d128c	258	#endif /* CONFIG_SND_JACK_INPUT_DEV */
4e3f0dc6	259	}
e76d8cea MB	260
	261	err = snd_device_new(card, SNDRV_DEV_JACK, jack, &ops);
	262	if (err < 0)
	263	goto fail_input;
	264
9058cbe1 JY	265	jack->card = card;
	266	INIT_LIST_HEAD(&jack->kctl_list);
	267
4e3f0dc6 JY	268	if (initial_kctl)
	269	snd_jack_kctl_add(jack, jack_kctl);
	270
e76d8cea MB	271	*jjack = jack;
	272
	273	return 0;
	274
	275	fail_input:
fe0d128c	276	#ifdef CONFIG_SND_JACK_INPUT_DEV
e76d8cea	277	input_free_device(jack->input_dev);
fe0d128c	278	#endif
eeda276b	279	kfree(jack->id);
e76d8cea MB	280	kfree(jack);
	281	return err;
	282	}
	283	EXPORT_SYMBOL(snd_jack_new);
	284
fe0d128c	285	#ifdef CONFIG_SND_JACK_INPUT_DEV
e76d8cea MB	286	/**
	287	* snd_jack_set_parent - Set the parent device for a jack
	288	*
	289	* @jack: The jack to configure
	290	* @parent: The device to set as parent for the jack.
	291	*
a2e888f0	292	* Set the parent for the jack devices in the device tree. This
e76d8cea MB	293	* function is only valid prior to registration of the jack. If no
	294	* parent is configured then the parent device will be the sound card.
	295	*/
	296	void snd_jack_set_parent(struct snd_jack jack, struct device parent)
	297	{
	298	WARN_ON(jack->registered);
43b2cd54 TI	299	if (!jack->input_dev)
43b2cd54 TI	300	return;
e76d8cea MB	301
	302	jack->input_dev->dev.parent = parent;
	303	}
	304	EXPORT_SYMBOL(snd_jack_set_parent);
	305
ebb812cb MB	306	/**
	307	* snd_jack_set_key - Set a key mapping on a jack
	308	*
	309	* @jack: The jack to configure
	310	* @type: Jack report type for this key
	311	* @keytype: Input layer key type to be reported
	312	*
3f1185d6	313	* Map a SND_JACK_BTN_* button type to an input layer key, allowing
ebb812cb MB	314	* reporting of keys on accessories via the jack abstraction. If no
	315	* mapping is provided but keys are enabled in the jack type then
	316	* BTN_n numeric buttons will be reported.
	317	*
a2e888f0 MB	318	* If jacks are not reporting via the input API this call will have no
	319	* effect.
	320	*
ebb812cb MB	321	* Note that this is intended to be use by simple devices with small
	322	* numbers of keys that can be reported. It is also possible to
	323	* access the input device directly - devices with complex input
	324	* capabilities on accessories should consider doing this rather than
	325	* using this abstraction.
	326	*
	327	* This function may only be called prior to registration of the jack.
eb7c06e8 YB	328	*
eb7c06e8 YB	329	* Return: Zero if successful, or a negative error code on failure.
ebb812cb MB	330	*/
	331	int snd_jack_set_key(struct snd_jack *jack, enum snd_jack_types type,
	332	int keytype)
	333	{
	334	int key = fls(SND_JACK_BTN_0) - fls(type);
	335
	336	WARN_ON(jack->registered);
	337
	338	if (!keytype \|\| key >= ARRAY_SIZE(jack->key))
	339	return -EINVAL;
	340
	341	jack->type \|= type;
	342	jack->key[key] = keytype;
ebb812cb MB	343	return 0;
	344	}
	345	EXPORT_SYMBOL(snd_jack_set_key);
fe0d128c	346	#endif /* CONFIG_SND_JACK_INPUT_DEV */
ebb812cb	347
e76d8cea MB	348	/**
	349	* snd_jack_report - Report the current status of a jack
	350	*
	351	* @jack: The jack to report status for
	352	* @status: The current status of the jack
	353	*/
	354	void snd_jack_report(struct snd_jack *jack, int status)
	355	{
9058cbe1	356	struct snd_jack_kctl *jack_kctl;
fe0d128c	357	#ifdef CONFIG_SND_JACK_INPUT_DEV
bd8a71a7	358	int i;
fe0d128c	359	#endif
bd8a71a7	360
9a3f371e MB	361	if (!jack)
	362	return;
	363
6ed9495e JY	364	list_for_each_entry(jack_kctl, &jack->kctl_list, list)
	365	snd_kctl_jack_report(jack->card, jack_kctl->kctl,
	366	status & jack_kctl->mask_bits);
	367
fe0d128c	368	#ifdef CONFIG_SND_JACK_INPUT_DEV
6ed9495e JY	369	if (!jack->input_dev)
	370	return;
	371
ebb812cb MB	372	for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
	373	int testbit = SND_JACK_BTN_0 >> i;
	374
	375	if (jack->type & testbit)
	376	input_report_key(jack->input_dev, jack->key[i],
	377	status & testbit);
	378	}
	379
1c6e555c	380	for (i = 0; i < ARRAY_SIZE(jack_switch_types); i++) {
bd8a71a7 MB	381	int testbit = 1 << i;
bd8a71a7 MB	382	if (jack->type & testbit)
1c6e555c MB	383	input_report_switch(jack->input_dev,
1c6e555c MB	384	jack_switch_types[i],
bd8a71a7 MB	385	status & testbit);
bd8a71a7 MB	386	}
e76d8cea MB	387
e76d8cea MB	388	input_sync(jack->input_dev);
fe0d128c	389	#endif /* CONFIG_SND_JACK_INPUT_DEV */
e76d8cea MB	390	}
e76d8cea MB	391	EXPORT_SYMBOL(snd_jack_report);