1/*
2 * Helper functions for jack-detection kcontrols
3 *
4 * Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the Free
8 * Software Foundation; either version 2 of the License, or (at your option)
9 * any later version.
10 */
11
12#include <linux/kernel.h>
13#include <linux/export.h>
14#include <sound/core.h>
15#include <sound/control.h>
16
17#define jack_detect_kctl_info	snd_ctl_boolean_mono_info
18
19static int jack_detect_kctl_get(struct snd_kcontrol *kcontrol,
20				struct snd_ctl_elem_value *ucontrol)
21{
22	ucontrol->value.integer.value[0] = kcontrol->private_value;
23	return 0;
24}
25
26static struct snd_kcontrol_new jack_detect_kctl = {
27	/* name is filled later */
28	.iface = SNDRV_CTL_ELEM_IFACE_CARD,
29	.access = SNDRV_CTL_ELEM_ACCESS_READ,
30	.info = jack_detect_kctl_info,
31	.get = jack_detect_kctl_get,
32};
33
34struct snd_kcontrol *
35snd_kctl_jack_new(const char *name, int idx, void *private_data)
36{
37	struct snd_kcontrol *kctl;
38	kctl = snd_ctl_new1(&jack_detect_kctl, private_data);
39	if (!kctl)
40		return NULL;
41	snprintf(kctl->id.name, sizeof(kctl->id.name), "%s Jack", name);
42	kctl->id.index = idx;
43	kctl->private_value = 0;
44	return kctl;
45}
46EXPORT_SYMBOL_GPL(snd_kctl_jack_new);
47
48void snd_kctl_jack_report(struct snd_card *card,
49			  struct snd_kcontrol *kctl, bool status)
50{
51	if (kctl->private_value == status)
52		return;
53	kctl->private_value = status;
54	snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
55}
56EXPORT_SYMBOL_GPL(snd_kctl_jack_report);
57