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7#include <linux/slab.h>
8#include <linux/time.h>
9#include <linux/export.h>
10#include <linux/errno.h>
11#include <sound/core.h>
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29int snd_device_new(struct snd_card *card, enum snd_device_type type,
30 void *device_data, const struct snd_device_ops *ops)
31{
32 struct snd_device *dev;
33 struct list_head *p;
34
35 if (snd_BUG_ON(!card || !device_data || !ops))
36 return -ENXIO;
37 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
38 if (!dev)
39 return -ENOMEM;
40 INIT_LIST_HEAD(&dev->list);
41 dev->card = card;
42 dev->type = type;
43 dev->state = SNDRV_DEV_BUILD;
44 dev->device_data = device_data;
45 dev->ops = ops;
46
47
48 list_for_each_prev(p, &card->devices) {
49 struct snd_device *pdev = list_entry(p, struct snd_device, list);
50 if ((unsigned int)pdev->type <= (unsigned int)type)
51 break;
52 }
53
54 list_add(&dev->list, p);
55 return 0;
56}
57EXPORT_SYMBOL(snd_device_new);
58
59static void __snd_device_disconnect(struct snd_device *dev)
60{
61 if (dev->state == SNDRV_DEV_REGISTERED) {
62 if (dev->ops->dev_disconnect &&
63 dev->ops->dev_disconnect(dev))
64 dev_err(dev->card->dev, "device disconnect failure\n");
65 dev->state = SNDRV_DEV_DISCONNECTED;
66 }
67}
68
69static void __snd_device_free(struct snd_device *dev)
70{
71
72 list_del(&dev->list);
73
74 __snd_device_disconnect(dev);
75 if (dev->ops->dev_free) {
76 if (dev->ops->dev_free(dev))
77 dev_err(dev->card->dev, "device free failure\n");
78 }
79 kfree(dev);
80}
81
82static struct snd_device *look_for_dev(struct snd_card *card, void *device_data)
83{
84 struct snd_device *dev;
85
86 list_for_each_entry(dev, &card->devices, list)
87 if (dev->device_data == device_data)
88 return dev;
89
90 return NULL;
91}
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106void snd_device_disconnect(struct snd_card *card, void *device_data)
107{
108 struct snd_device *dev;
109
110 if (snd_BUG_ON(!card || !device_data))
111 return;
112 dev = look_for_dev(card, device_data);
113 if (dev)
114 __snd_device_disconnect(dev);
115 else
116 dev_dbg(card->dev, "device disconnect %p (from %pS), not found\n",
117 device_data, __builtin_return_address(0));
118}
119EXPORT_SYMBOL_GPL(snd_device_disconnect);
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130void snd_device_free(struct snd_card *card, void *device_data)
131{
132 struct snd_device *dev;
133
134 if (snd_BUG_ON(!card || !device_data))
135 return;
136 dev = look_for_dev(card, device_data);
137 if (dev)
138 __snd_device_free(dev);
139 else
140 dev_dbg(card->dev, "device free %p (from %pS), not found\n",
141 device_data, __builtin_return_address(0));
142}
143EXPORT_SYMBOL(snd_device_free);
144
145static int __snd_device_register(struct snd_device *dev)
146{
147 if (dev->state == SNDRV_DEV_BUILD) {
148 if (dev->ops->dev_register) {
149 int err = dev->ops->dev_register(dev);
150 if (err < 0)
151 return err;
152 }
153 dev->state = SNDRV_DEV_REGISTERED;
154 }
155 return 0;
156}
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171int snd_device_register(struct snd_card *card, void *device_data)
172{
173 struct snd_device *dev;
174
175 if (snd_BUG_ON(!card || !device_data))
176 return -ENXIO;
177 dev = look_for_dev(card, device_data);
178 if (dev)
179 return __snd_device_register(dev);
180 snd_BUG();
181 return -ENXIO;
182}
183EXPORT_SYMBOL(snd_device_register);
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189int snd_device_register_all(struct snd_card *card)
190{
191 struct snd_device *dev;
192 int err;
193
194 if (snd_BUG_ON(!card))
195 return -ENXIO;
196 list_for_each_entry(dev, &card->devices, list) {
197 err = __snd_device_register(dev);
198 if (err < 0)
199 return err;
200 }
201 return 0;
202}
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208void snd_device_disconnect_all(struct snd_card *card)
209{
210 struct snd_device *dev;
211
212 if (snd_BUG_ON(!card))
213 return;
214 list_for_each_entry_reverse(dev, &card->devices, list)
215 __snd_device_disconnect(dev);
216}
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222void snd_device_free_all(struct snd_card *card)
223{
224 struct snd_device *dev, *next;
225
226 if (snd_BUG_ON(!card))
227 return;
228 list_for_each_entry_safe_reverse(dev, next, &card->devices, list) {
229
230 if (dev->type == SNDRV_DEV_CONTROL ||
231 dev->type == SNDRV_DEV_LOWLEVEL)
232 continue;
233 __snd_device_free(dev);
234 }
235
236
237 list_for_each_entry_safe_reverse(dev, next, &card->devices, list)
238 __snd_device_free(dev);
239}
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251int snd_device_get_state(struct snd_card *card, void *device_data)
252{
253 struct snd_device *dev;
254
255 dev = look_for_dev(card, device_data);
256 if (dev)
257 return dev->state;
258 return -1;
259}
260EXPORT_SYMBOL_GPL(snd_device_get_state);
261