Takashi Iwai | 35be544 | 2011-11-02 08:36:06 +0100 | [diff] [blame] | 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> |
Takashi Iwai | bf815bf | 2011-11-16 14:28:33 +0100 | [diff] [blame] | 13 | #include <linux/export.h> |
Takashi Iwai | 35be544 | 2011-11-02 08:36:06 +0100 | [diff] [blame] | 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 | |
Jie Yang | b8dd086 | 2015-04-27 21:20:57 +0800 | [diff] [blame^] | 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 | |
Takashi Iwai | 35be544 | 2011-11-02 08:36:06 +0100 | [diff] [blame] | 63 | struct snd_kcontrol * |
Jie Yang | b8dd086 | 2015-04-27 21:20:57 +0800 | [diff] [blame^] | 64 | snd_kctl_jack_new(const char *name, void *private_data, struct snd_card *card) |
Takashi Iwai | 35be544 | 2011-11-02 08:36:06 +0100 | [diff] [blame] | 65 | { |
| 66 | struct snd_kcontrol *kctl; |
Jie Yang | b8dd086 | 2015-04-27 21:20:57 +0800 | [diff] [blame^] | 67 | |
Takashi Iwai | 35be544 | 2011-11-02 08:36:06 +0100 | [diff] [blame] | 68 | kctl = snd_ctl_new1(&jack_detect_kctl, private_data); |
| 69 | if (!kctl) |
| 70 | return NULL; |
Jie Yang | b8dd086 | 2015-04-27 21:20:57 +0800 | [diff] [blame^] | 71 | |
| 72 | jack_kctl_name_gen(kctl->id.name, name, sizeof(kctl->id.name)); |
| 73 | kctl->id.index = get_available_index(card, name); |
Takashi Iwai | 35be544 | 2011-11-02 08:36:06 +0100 | [diff] [blame] | 74 | kctl->private_value = 0; |
| 75 | return kctl; |
| 76 | } |
| 77 | EXPORT_SYMBOL_GPL(snd_kctl_jack_new); |
| 78 | |
| 79 | void snd_kctl_jack_report(struct snd_card *card, |
| 80 | struct snd_kcontrol *kctl, bool status) |
| 81 | { |
| 82 | if (kctl->private_value == status) |
| 83 | return; |
| 84 | kctl->private_value = status; |
| 85 | snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id); |
| 86 | } |
| 87 | EXPORT_SYMBOL_GPL(snd_kctl_jack_report); |