projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 26 | static 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 | ||
| 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 | ||
| 44 | while (snd_ctl_find_id(card, &sid)) | |
| 45 | sid.index++; | |
| 46 | ||
| 47 | return sid.index; | |
| 48 | } | |
| 49 | ||
| 50 | static void jack_kctl_name_gen(char *name, const char *src_name, int size) | |
| 51 | { | |
| 52 | size_t count = strlen(src_name); | |
| 53 | bool need_cat = true; | |
| 54 | ||
| 55 | /* remove redundant " Jack" from src_name */ | |
| 56 | if (count >= 5) | |
| 57 | need_cat = strncmp(&src_name[count - 5], " Jack", 5) ? true : false; | |
| 58 | ||
| 59 | snprintf(name, size, need_cat ? "%s Jack" : "%s", src_name); | |
| 60 | ||
| 61 | } | |
| 62 | ||
| 35be544a | 63 | struct snd_kcontrol * |
| 2ba2dfa1 | 64 | snd_kctl_jack_new(const char *name, struct snd_card *card) |
| 35be544a TI |
65 | { |
| 66 | struct snd_kcontrol *kctl; | |
| b8dd0866 | 67 | |
| 2ba2dfa1 | 68 | kctl = snd_ctl_new1(&jack_detect_kctl, NULL); |
| 35be544a TI |
69 | if (!kctl) |
| 70 | return NULL; | |
| b8dd0866 JY |
71 | |
| 72 | jack_kctl_name_gen(kctl->id.name, name, sizeof(kctl->id.name)); | |
| d0a601c2 | 73 | kctl->id.index = get_available_index(card, kctl->id.name); |
| 35be544a TI |
74 | kctl->private_value = 0; |
| 75 | return kctl; | |
| 76 | } | |
| 35be544a TI |
77 | |
| 78 | void snd_kctl_jack_report(struct snd_card *card, | |
| 79 | struct snd_kcontrol *kctl, bool status) | |
| 80 | { | |
| 81 | if (kctl->private_value == status) | |
| 82 | return; | |
| 83 | kctl->private_value = status; | |
| 84 | snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id); | |
| 85 | } |