[linux-2.6-block.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 <sound/jack.h>
#include <sound/core.h>

static int snd_jack_dev_free(struct snd_device *device)
{
	struct snd_jack *jack = device->device_data;

	/* 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);

	kfree(jack);

	return 0;
}

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;

	snprintf(jack->name, sizeof(jack->name), "%s %s",
		 card->longname, jack->id);
	jack->input_dev->name = jack->name;

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

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

	return err;
}

/**
 * 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.
 *
 * Creates a new jack object.
 *
 * Returns 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)
{
	struct snd_jack *jack;
	int err;
	static struct snd_device_ops ops = {
		.dev_free = snd_jack_dev_free,
		.dev_register = snd_jack_dev_register,
	};

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

	jack->id = id;

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

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

	jack->type = type;

	if (type & SND_JACK_HEADPHONE)
		input_set_capability(jack->input_dev, EV_SW,
				     SW_HEADPHONE_INSERT);
	if (type & SND_JACK_MICROPHONE)
		input_set_capability(jack->input_dev, EV_SW,
				     SW_MICROPHONE_INSERT);

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

	*jjack = jack;

	return 0;

fail_input:
	input_free_device(jack->input_dev);
	kfree(jack);
	return err;
}
EXPORT_SYMBOL(snd_jack_new);

/**
 * 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 input device 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);

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

/**
 * 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)
{
	if (!jack)
		return;

	if (jack->type & SND_JACK_HEADPHONE)
		input_report_switch(jack->input_dev, SW_HEADPHONE_INSERT,
				    status & SND_JACK_HEADPHONE);
	if (jack->type & SND_JACK_MICROPHONE)
		input_report_switch(jack->input_dev, SW_MICROPHONE_INSERT,
				    status & SND_JACK_MICROPHONE);

	input_sync(jack->input_dev);
}
EXPORT_SYMBOL(snd_jack_report);

MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("Jack detection support for ALSA");
MODULE_LICENSE("GPL");
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>
	23	#include <sound/jack.h>
	24	#include <sound/core.h>
	25
	26	static int snd_jack_dev_free(struct snd_device *device)
	27	{
	28	struct snd_jack *jack = device->device_data;
	29
	30	/* If the input device is registered with the input subsystem
	31	* then we need to use a different deallocator. */
	32	if (jack->registered)
	33	input_unregister_device(jack->input_dev);
	34	else
	35	input_free_device(jack->input_dev);
	36
	37	kfree(jack);
	38
	39	return 0;
	40	}
	41
	42	static int snd_jack_dev_register(struct snd_device *device)
	43	{
	44	struct snd_jack *jack = device->device_data;
	45	struct snd_card *card = device->card;
	46	int err;
	47
	48	snprintf(jack->name, sizeof(jack->name), "%s %s",
	49	card->longname, jack->id);
	50	jack->input_dev->name = jack->name;
	51
	52	/* Default to the sound card device. */
	53	if (!jack->input_dev->dev.parent)
	54	jack->input_dev->dev.parent = card->dev;
	55
	56	err = input_register_device(jack->input_dev);
	57	if (err == 0)
	58	jack->registered = 1;
	59
	60	return err;
	61	}
	62
	63	/**
	64	* snd_jack_new - Create a new jack
65	* @card: the card instance
66	* @id: an identifying string for this jack
67	* @type: a bitmask of enum snd_jack_type values that can be detected by
68	* this jack
69	* @jjack: Used to provide the allocated jack object to the caller.
70	*
71	* Creates a new jack object.
72	*
73	* Returns zero if successful, or a negative error code on failure.
74	* On success jjack will be initialised.
75	*/
76	int snd_jack_new(struct snd_card card, const char id, int type,
77	struct snd_jack **jjack)
78	{
79	struct snd_jack *jack;
80	int err;
81	static struct snd_device_ops ops = {
82	.dev_free = snd_jack_dev_free,
83	.dev_register = snd_jack_dev_register,
84	};
85
86	jack = kzalloc(sizeof(struct snd_jack), GFP_KERNEL);
87	if (jack == NULL)
88	return -ENOMEM;
89
90	jack->id = id;
91
92	jack->input_dev = input_allocate_device();
93	if (jack->input_dev == NULL) {
94	err = -ENOMEM;
95	goto fail_input;
96	}
97
98	jack->input_dev->phys = "ALSA";
99
100	jack->type = type;
101
102	if (type & SND_JACK_HEADPHONE)
103	input_set_capability(jack->input_dev, EV_SW,
104	SW_HEADPHONE_INSERT);
105	if (type & SND_JACK_MICROPHONE)
106	input_set_capability(jack->input_dev, EV_SW,
107	SW_MICROPHONE_INSERT);
108
109	err = snd_device_new(card, SNDRV_DEV_JACK, jack, &ops);
110	if (err < 0)
111	goto fail_input;
112
113	*jjack = jack;
114
115	return 0;
116
117	fail_input:
118	input_free_device(jack->input_dev);
119	kfree(jack);
120	return err;
121	}
122	EXPORT_SYMBOL(snd_jack_new);
123
124	/**
125	* snd_jack_set_parent - Set the parent device for a jack
126	*
127	* @jack: The jack to configure
128	* @parent: The device to set as parent for the jack.
129	*
130	* Set the parent for the jack input device in the device tree. This
131	* function is only valid prior to registration of the jack. If no
132	* parent is configured then the parent device will be the sound card.
133	*/
134	void snd_jack_set_parent(struct snd_jack jack, struct device parent)
135	{
136	WARN_ON(jack->registered);
137
138	jack->input_dev->dev.parent = parent;
139	}
140	EXPORT_SYMBOL(snd_jack_set_parent);
141
142	/**
143	* snd_jack_report - Report the current status of a jack
144	*
145	* @jack: The jack to report status for
146	* @status: The current status of the jack
147	*/
148	void snd_jack_report(struct snd_jack *jack, int status)
149	{
9a3f371e MB	150	if (!jack)
	151	return;
	152
e76d8cea MB	153	if (jack->type & SND_JACK_HEADPHONE)
	154	input_report_switch(jack->input_dev, SW_HEADPHONE_INSERT,
	155	status & SND_JACK_HEADPHONE);
	156	if (jack->type & SND_JACK_MICROPHONE)
	157	input_report_switch(jack->input_dev, SW_MICROPHONE_INSERT,
	158	status & SND_JACK_MICROPHONE);
	159
	160	input_sync(jack->input_dev);
	161	}
	162	EXPORT_SYMBOL(snd_jack_report);
	163
	164	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	165	MODULE_DESCRIPTION("Jack detection support for ALSA");
	166	MODULE_LICENSE("GPL");