1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Helper functions for jack-detection kcontrols
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/kernel.h>
9*4882a593Smuzhiyun #include <linux/export.h>
10*4882a593Smuzhiyun #include <sound/core.h>
11*4882a593Smuzhiyun #include <sound/control.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #define jack_detect_kctl_info snd_ctl_boolean_mono_info
14*4882a593Smuzhiyun
jack_detect_kctl_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)15*4882a593Smuzhiyun static int jack_detect_kctl_get(struct snd_kcontrol *kcontrol,
16*4882a593Smuzhiyun struct snd_ctl_elem_value *ucontrol)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun ucontrol->value.integer.value[0] = kcontrol->private_value;
19*4882a593Smuzhiyun return 0;
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun static const struct snd_kcontrol_new jack_detect_kctl = {
23*4882a593Smuzhiyun /* name is filled later */
24*4882a593Smuzhiyun .iface = SNDRV_CTL_ELEM_IFACE_CARD,
25*4882a593Smuzhiyun .access = SNDRV_CTL_ELEM_ACCESS_READ,
26*4882a593Smuzhiyun .info = jack_detect_kctl_info,
27*4882a593Smuzhiyun .get = jack_detect_kctl_get,
28*4882a593Smuzhiyun };
29*4882a593Smuzhiyun
get_available_index(struct snd_card * card,const char * name)30*4882a593Smuzhiyun static int get_available_index(struct snd_card *card, const char *name)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun struct snd_ctl_elem_id sid;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun memset(&sid, 0, sizeof(sid));
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun sid.index = 0;
37*4882a593Smuzhiyun sid.iface = SNDRV_CTL_ELEM_IFACE_CARD;
38*4882a593Smuzhiyun strlcpy(sid.name, name, sizeof(sid.name));
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun while (snd_ctl_find_id(card, &sid)) {
41*4882a593Smuzhiyun sid.index++;
42*4882a593Smuzhiyun /* reset numid; otherwise snd_ctl_find_id() hits this again */
43*4882a593Smuzhiyun sid.numid = 0;
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun return sid.index;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
jack_kctl_name_gen(char * name,const char * src_name,int size)49*4882a593Smuzhiyun static void jack_kctl_name_gen(char *name, const char *src_name, int size)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun size_t count = strlen(src_name);
52*4882a593Smuzhiyun bool need_cat = true;
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun /* remove redundant " Jack" from src_name */
55*4882a593Smuzhiyun if (count >= 5)
56*4882a593Smuzhiyun need_cat = strncmp(&src_name[count - 5], " Jack", 5) ? true : false;
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun snprintf(name, size, need_cat ? "%s Jack" : "%s", src_name);
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun struct snd_kcontrol *
snd_kctl_jack_new(const char * name,struct snd_card * card)63*4882a593Smuzhiyun snd_kctl_jack_new(const char *name, struct snd_card *card)
64*4882a593Smuzhiyun {
65*4882a593Smuzhiyun struct snd_kcontrol *kctl;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun kctl = snd_ctl_new1(&jack_detect_kctl, NULL);
68*4882a593Smuzhiyun if (!kctl)
69*4882a593Smuzhiyun return NULL;
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun jack_kctl_name_gen(kctl->id.name, name, sizeof(kctl->id.name));
72*4882a593Smuzhiyun kctl->id.index = get_available_index(card, kctl->id.name);
73*4882a593Smuzhiyun kctl->private_value = 0;
74*4882a593Smuzhiyun return kctl;
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
snd_kctl_jack_report(struct snd_card * card,struct snd_kcontrol * kctl,bool status)77*4882a593Smuzhiyun void snd_kctl_jack_report(struct snd_card *card,
78*4882a593Smuzhiyun struct snd_kcontrol *kctl, bool status)
79*4882a593Smuzhiyun {
80*4882a593Smuzhiyun if (kctl->private_value == status)
81*4882a593Smuzhiyun return;
82*4882a593Smuzhiyun kctl->private_value = status;
83*4882a593Smuzhiyun snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
84*4882a593Smuzhiyun }
85