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22#include <linux/input.h>
23#include <linux/slab.h>
24#include <linux/module.h>
25#include <sound/jack.h>
26#include <sound/core.h>
27
28static int jack_switch_types[SND_JACK_SWITCH_TYPES] = {
29 SW_HEADPHONE_INSERT,
30 SW_MICROPHONE_INSERT,
31 SW_LINEOUT_INSERT,
32 SW_JACK_PHYSICAL_INSERT,
33 SW_VIDEOOUT_INSERT,
34 SW_LINEIN_INSERT,
35};
36
37static int snd_jack_dev_free(struct snd_device *device)
38{
39 struct snd_jack *jack = device->device_data;
40
41 if (jack->private_free)
42 jack->private_free(jack);
43
44
45
46 if (jack->registered)
47 input_unregister_device(jack->input_dev);
48 else
49 input_free_device(jack->input_dev);
50
51 kfree(jack->id);
52 kfree(jack);
53
54 return 0;
55}
56
57static int snd_jack_dev_register(struct snd_device *device)
58{
59 struct snd_jack *jack = device->device_data;
60 struct snd_card *card = device->card;
61 int err, i;
62
63 snprintf(jack->name, sizeof(jack->name), "%s %s",
64 card->shortname, jack->id);
65 jack->input_dev->name = jack->name;
66
67
68 if (!jack->input_dev->dev.parent)
69 jack->input_dev->dev.parent = snd_card_get_device_link(card);
70
71
72 for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
73 int testbit = SND_JACK_BTN_0 >> i;
74
75 if (!(jack->type & testbit))
76 continue;
77
78 if (!jack->key[i])
79 jack->key[i] = BTN_0 + i;
80
81 input_set_capability(jack->input_dev, EV_KEY, jack->key[i]);
82 }
83
84 err = input_register_device(jack->input_dev);
85 if (err == 0)
86 jack->registered = 1;
87
88 return err;
89}
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103
104int snd_jack_new(struct snd_card *card, const char *id, int type,
105 struct snd_jack **jjack)
106{
107 struct snd_jack *jack;
108 int err;
109 int i;
110 static struct snd_device_ops ops = {
111 .dev_free = snd_jack_dev_free,
112 .dev_register = snd_jack_dev_register,
113 };
114
115 jack = kzalloc(sizeof(struct snd_jack), GFP_KERNEL);
116 if (jack == NULL)
117 return -ENOMEM;
118
119 jack->id = kstrdup(id, GFP_KERNEL);
120
121 jack->input_dev = input_allocate_device();
122 if (jack->input_dev == NULL) {
123 err = -ENOMEM;
124 goto fail_input;
125 }
126
127 jack->input_dev->phys = "ALSA";
128
129 jack->type = type;
130
131 for (i = 0; i < SND_JACK_SWITCH_TYPES; i++)
132 if (type & (1 << i))
133 input_set_capability(jack->input_dev, EV_SW,
134 jack_switch_types[i]);
135
136 err = snd_device_new(card, SNDRV_DEV_JACK, jack, &ops);
137 if (err < 0)
138 goto fail_input;
139
140 *jjack = jack;
141
142 return 0;
143
144fail_input:
145 input_free_device(jack->input_dev);
146 kfree(jack->id);
147 kfree(jack);
148 return err;
149}
150EXPORT_SYMBOL(snd_jack_new);
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161
162void snd_jack_set_parent(struct snd_jack *jack, struct device *parent)
163{
164 WARN_ON(jack->registered);
165
166 jack->input_dev->dev.parent = parent;
167}
168EXPORT_SYMBOL(snd_jack_set_parent);
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193int snd_jack_set_key(struct snd_jack *jack, enum snd_jack_types type,
194 int keytype)
195{
196 int key = fls(SND_JACK_BTN_0) - fls(type);
197
198 WARN_ON(jack->registered);
199
200 if (!keytype || key >= ARRAY_SIZE(jack->key))
201 return -EINVAL;
202
203 jack->type |= type;
204 jack->key[key] = keytype;
205
206 return 0;
207}
208EXPORT_SYMBOL(snd_jack_set_key);
209
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214
215
216void snd_jack_report(struct snd_jack *jack, int status)
217{
218 int i;
219
220 if (!jack)
221 return;
222
223 for (i = 0; i < ARRAY_SIZE(jack->key); i++) {
224 int testbit = SND_JACK_BTN_0 >> i;
225
226 if (jack->type & testbit)
227 input_report_key(jack->input_dev, jack->key[i],
228 status & testbit);
229 }
230
231 for (i = 0; i < ARRAY_SIZE(jack_switch_types); i++) {
232 int testbit = 1 << i;
233 if (jack->type & testbit)
234 input_report_switch(jack->input_dev,
235 jack_switch_types[i],
236 status & testbit);
237 }
238
239 input_sync(jack->input_dev);
240}
241EXPORT_SYMBOL(snd_jack_report);
242
243MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
244MODULE_DESCRIPTION("Jack detection support for ALSA");
245MODULE_LICENSE("GPL");
246