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-rw-r--r--include/sound/core.h1
-rw-r--r--include/sound/jack.h75
-rw-r--r--sound/core/jack.c163
3 files changed, 239 insertions, 0 deletions
diff --git a/include/sound/core.h b/include/sound/core.h
index 558b96284bd2..1a4ff0bdcf6a 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -63,6 +63,7 @@ typedef int __bitwise snd_device_type_t;
63#define SNDRV_DEV_INFO ((__force snd_device_type_t) 0x1006) 63#define SNDRV_DEV_INFO ((__force snd_device_type_t) 0x1006)
64#define SNDRV_DEV_BUS ((__force snd_device_type_t) 0x1007) 64#define SNDRV_DEV_BUS ((__force snd_device_type_t) 0x1007)
65#define SNDRV_DEV_CODEC ((__force snd_device_type_t) 0x1008) 65#define SNDRV_DEV_CODEC ((__force snd_device_type_t) 0x1008)
66#define SNDRV_DEV_JACK ((__force snd_device_type_t) 0x1009)
66#define SNDRV_DEV_LOWLEVEL ((__force snd_device_type_t) 0x2000) 67#define SNDRV_DEV_LOWLEVEL ((__force snd_device_type_t) 0x2000)
67 68
68typedef int __bitwise snd_device_state_t; 69typedef int __bitwise snd_device_state_t;
diff --git a/include/sound/jack.h b/include/sound/jack.h
new file mode 100644
index 000000000000..b1b2b8b59adb
--- /dev/null
+++ b/include/sound/jack.h
@@ -0,0 +1,75 @@
1#ifndef __SOUND_JACK_H
2#define __SOUND_JACK_H
3
4/*
5 * Jack abstraction layer
6 *
7 * Copyright 2008 Wolfson Microelectronics plc
8 *
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25
26#include <sound/core.h>
27
28struct input_dev;
29
30/**
31 * Jack types which can be reported. These values are used as a
32 * bitmask.
33 */
34enum snd_jack_types {
35 SND_JACK_HEADPHONE = 0x0001,
36 SND_JACK_MICROPHONE = 0x0002,
37 SND_JACK_HEADSET = SND_JACK_HEADPHONE | SND_JACK_MICROPHONE,
38};
39
40struct snd_jack {
41 struct input_dev *input_dev;
42 int registered;
43 int type;
44 const char *id;
45 char name[100];
46};
47
48#ifdef CONFIG_SND_JACK
49
50int snd_jack_new(struct snd_card *card, const char *id, int type,
51 struct snd_jack **jack);
52void snd_jack_set_parent(struct snd_jack *jack, struct device *parent);
53
54void snd_jack_report(struct snd_jack *jack, int status);
55
56#else
57
58static inline int snd_jack_new(struct snd_card *card, const char *id, int type,
59 struct snd_jack **jack)
60{
61 return 0;
62}
63
64static inline void snd_jack_set_parent(struct snd_jack *jack,
65 struct device *parent)
66{
67}
68
69static inline void snd_jack_report(struct snd_jack *jack, int status)
70{
71}
72
73#endif
74
75#endif
diff --git a/sound/core/jack.c b/sound/core/jack.c
new file mode 100644
index 000000000000..8133a2b173a5
--- /dev/null
+++ b/sound/core/jack.c
@@ -0,0 +1,163 @@
1/*
2 * Jack abstraction layer
3 *
4 * Copyright 2008 Wolfson Microelectronics
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22#include <linux/input.h>
23#include <sound/jack.h>
24#include <sound/core.h>
25
26static int snd_jack_dev_free(struct snd_device *device)
27{
28 struct snd_jack *jack = device->device_data;
29
30 /* If the input device is registered with the input subsystem
31 * then we need to use a different deallocator. */
32 if (jack->registered)
33 input_unregister_device(jack->input_dev);
34 else
35 input_free_device(jack->input_dev);
36
37 kfree(jack);
38
39 return 0;
40}
41
42static int snd_jack_dev_register(struct snd_device *device)
43{
44 struct snd_jack *jack = device->device_data;
45 struct snd_card *card = device->card;
46 int err;
47
48 snprintf(jack->name, sizeof(jack->name), "%s %s",
49 card->longname, jack->id);
50 jack->input_dev->name = jack->name;
51
52 /* Default to the sound card device. */
53 if (!jack->input_dev->dev.parent)
54 jack->input_dev->dev.parent = card->dev;
55
56 err = input_register_device(jack->input_dev);
57 if (err == 0)
58 jack->registered = 1;
59
60 return err;
61}
62
63/**
64 * snd_jack_new - Create a new jack
65 * @card: the card instance
66 * @id: an identifying string for this jack
67 * @type: a bitmask of enum snd_jack_type values that can be detected by
68 * this jack
69 * @jjack: Used to provide the allocated jack object to the caller.
70 *
71 * Creates a new jack object.
72 *
73 * Returns zero if successful, or a negative error code on failure.
74 * On success jjack will be initialised.
75 */
76int snd_jack_new(struct snd_card *card, const char *id, int type,
77 struct snd_jack **jjack)
78{
79 struct snd_jack *jack;
80 int err;
81 static struct snd_device_ops ops = {
82 .dev_free = snd_jack_dev_free,
83 .dev_register = snd_jack_dev_register,
84 };
85
86 jack = kzalloc(sizeof(struct snd_jack), GFP_KERNEL);
87 if (jack == NULL)
88 return -ENOMEM;
89
90 jack->id = id;
91
92 jack->input_dev = input_allocate_device();
93 if (jack->input_dev == NULL) {
94 err = -ENOMEM;
95 goto fail_input;
96 }
97
98 jack->input_dev->phys = "ALSA";
99
100 jack->type = type;
101
102 if (type & SND_JACK_HEADPHONE)
103 input_set_capability(jack->input_dev, EV_SW,
104 SW_HEADPHONE_INSERT);
105 if (type & SND_JACK_MICROPHONE)
106 input_set_capability(jack->input_dev, EV_SW,
107 SW_MICROPHONE_INSERT);
108
109 err = snd_device_new(card, SNDRV_DEV_JACK, jack, &ops);
110 if (err < 0)
111 goto fail_input;
112
113 *jjack = jack;
114
115 return 0;
116
117fail_input:
118 input_free_device(jack->input_dev);
119 kfree(jack);
120 return err;
121}
122EXPORT_SYMBOL(snd_jack_new);
123
124/**
125 * snd_jack_set_parent - Set the parent device for a jack
126 *
127 * @jack: The jack to configure
128 * @parent: The device to set as parent for the jack.
129 *
130 * Set the parent for the jack input device in the device tree. This
131 * function is only valid prior to registration of the jack. If no
132 * parent is configured then the parent device will be the sound card.
133 */
134void snd_jack_set_parent(struct snd_jack *jack, struct device *parent)
135{
136 WARN_ON(jack->registered);
137
138 jack->input_dev->dev.parent = parent;
139}
140EXPORT_SYMBOL(snd_jack_set_parent);
141
142/**
143 * snd_jack_report - Report the current status of a jack
144 *
145 * @jack: The jack to report status for
146 * @status: The current status of the jack
147 */
148void snd_jack_report(struct snd_jack *jack, int status)
149{
150 if (jack->type & SND_JACK_HEADPHONE)
151 input_report_switch(jack->input_dev, SW_HEADPHONE_INSERT,
152 status & SND_JACK_HEADPHONE);
153 if (jack->type & SND_JACK_MICROPHONE)
154 input_report_switch(jack->input_dev, SW_MICROPHONE_INSERT,
155 status & SND_JACK_MICROPHONE);
156
157 input_sync(jack->input_dev);
158}
159EXPORT_SYMBOL(snd_jack_report);
160
161MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
162MODULE_DESCRIPTION("Jack detection support for ALSA");
163MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-15 10:09:21 -0500