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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 const struct snd_kcontrol_new jack_detect_kctl = {
27
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
34static int get_available_index(struct snd_card *card, const char *name)
35{
36 struct snd_ctl_elem_id sid;
37
38 memset(&sid, 0, sizeof(sid));
39
40 sid.index = 0;
41 sid.iface = SNDRV_CTL_ELEM_IFACE_CARD;
42 strlcpy(sid.name, name, sizeof(sid.name));
43
44 while (snd_ctl_find_id(card, &sid)) {
45 sid.index++;
46
47 sid.numid = 0;
48 }
49
50 return sid.index;
51}
52
53static void jack_kctl_name_gen(char *name, const char *src_name, int size)
54{
55 size_t count = strlen(src_name);
56 bool need_cat = true;
57
58
59 if (count >= 5)
60 need_cat = strncmp(&src_name[count - 5], " Jack", 5) ? true : false;
61
62 snprintf(name, size, need_cat ? "%s Jack" : "%s", src_name);
63
64}
65
66struct snd_kcontrol *
67snd_kctl_jack_new(const char *name, struct snd_card *card)
68{
69 struct snd_kcontrol *kctl;
70
71 kctl = snd_ctl_new1(&jack_detect_kctl, NULL);
72 if (!kctl)
73 return NULL;
74
75 jack_kctl_name_gen(kctl->id.name, name, sizeof(kctl->id.name));
76 kctl->id.index = get_available_index(card, kctl->id.name);
77 kctl->private_value = 0;
78 return kctl;
79}
80
81void snd_kctl_jack_report(struct snd_card *card,
82 struct snd_kcontrol *kctl, bool status)
83{
84 if (kctl->private_value == status)
85 return;
86 kctl->private_value = status;
87 snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
88}
89