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35be544a TI |
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> | |
bf815bf0 | 13 | #include <linux/export.h> |
35be544a TI |
14 | #include <sound/core.h> |
15 | #include <sound/control.h> | |
16 | ||
17 | #define jack_detect_kctl_info snd_ctl_boolean_mono_info | |
18 | ||
19 | static 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 | ||
905e46ac | 26 | static const struct snd_kcontrol_new jack_detect_kctl = { |
35be544a TI |
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 | ||
b8dd0866 JY |
34 | static 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 | ||
7378bc2f | 44 | while (snd_ctl_find_id(card, &sid)) { |
b8dd0866 | 45 | sid.index++; |
7378bc2f TI |
46 | /* reset numid; otherwise snd_ctl_find_id() hits this again */ |
47 | sid.numid = 0; | |
48 | } | |
b8dd0866 JY |
49 | |
50 | return sid.index; | |
51 | } | |
52 | ||
53 | static 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 | /* remove redundant " Jack" from src_name */ | |
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 | ||
35be544a | 66 | struct snd_kcontrol * |
2ba2dfa1 | 67 | snd_kctl_jack_new(const char *name, struct snd_card *card) |
35be544a TI |
68 | { |
69 | struct snd_kcontrol *kctl; | |
b8dd0866 | 70 | |
2ba2dfa1 | 71 | kctl = snd_ctl_new1(&jack_detect_kctl, NULL); |
35be544a TI |
72 | if (!kctl) |
73 | return NULL; | |
b8dd0866 JY |
74 | |
75 | jack_kctl_name_gen(kctl->id.name, name, sizeof(kctl->id.name)); | |
d0a601c2 | 76 | kctl->id.index = get_available_index(card, kctl->id.name); |
35be544a TI |
77 | kctl->private_value = 0; |
78 | return kctl; | |
79 | } | |
35be544a TI |
80 | |
81 | void 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 | } |