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22#include <sound/driver.h>
23#include <linux/slab.h>
24#include <linux/time.h>
25#include <linux/errno.h>
26#include <sound/core.h>
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44int snd_device_new(struct snd_card *card, snd_device_type_t type,
45 void *device_data, struct snd_device_ops *ops)
46{
47 struct snd_device *dev;
48
49 snd_assert(card != NULL, return -ENXIO);
50 snd_assert(device_data != NULL, return -ENXIO);
51 snd_assert(ops != NULL, return -ENXIO);
52 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
53 if (dev == NULL) {
54 snd_printk(KERN_ERR "Cannot allocate device\n");
55 return -ENOMEM;
56 }
57 dev->card = card;
58 dev->type = type;
59 dev->state = SNDRV_DEV_BUILD;
60 dev->device_data = device_data;
61 dev->ops = ops;
62 list_add(&dev->list, &card->devices);
63 return 0;
64}
65
66EXPORT_SYMBOL(snd_device_new);
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79
80int snd_device_free(struct snd_card *card, void *device_data)
81{
82 struct snd_device *dev;
83
84 snd_assert(card != NULL, return -ENXIO);
85 snd_assert(device_data != NULL, return -ENXIO);
86 list_for_each_entry(dev, &card->devices, list) {
87 if (dev->device_data != device_data)
88 continue;
89
90 list_del(&dev->list);
91 if (dev->state == SNDRV_DEV_REGISTERED &&
92 dev->ops->dev_disconnect)
93 if (dev->ops->dev_disconnect(dev))
94 snd_printk(KERN_ERR
95 "device disconnect failure\n");
96 if (dev->ops->dev_free) {
97 if (dev->ops->dev_free(dev))
98 snd_printk(KERN_ERR "device free failure\n");
99 }
100 kfree(dev);
101 return 0;
102 }
103 snd_printd("device free %p (from %p), not found\n", device_data,
104 __builtin_return_address(0));
105 return -ENXIO;
106}
107
108EXPORT_SYMBOL(snd_device_free);
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122
123int snd_device_disconnect(struct snd_card *card, void *device_data)
124{
125 struct snd_device *dev;
126
127 snd_assert(card != NULL, return -ENXIO);
128 snd_assert(device_data != NULL, return -ENXIO);
129 list_for_each_entry(dev, &card->devices, list) {
130 if (dev->device_data != device_data)
131 continue;
132 if (dev->state == SNDRV_DEV_REGISTERED &&
133 dev->ops->dev_disconnect) {
134 if (dev->ops->dev_disconnect(dev))
135 snd_printk(KERN_ERR "device disconnect failure\n");
136 dev->state = SNDRV_DEV_DISCONNECTED;
137 }
138 return 0;
139 }
140 snd_printd("device disconnect %p (from %p), not found\n", device_data,
141 __builtin_return_address(0));
142 return -ENXIO;
143}
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157
158int snd_device_register(struct snd_card *card, void *device_data)
159{
160 struct snd_device *dev;
161 int err;
162
163 snd_assert(card != NULL, return -ENXIO);
164 snd_assert(device_data != NULL, return -ENXIO);
165 list_for_each_entry(dev, &card->devices, list) {
166 if (dev->device_data != device_data)
167 continue;
168 if (dev->state == SNDRV_DEV_BUILD && dev->ops->dev_register) {
169 if ((err = dev->ops->dev_register(dev)) < 0)
170 return err;
171 dev->state = SNDRV_DEV_REGISTERED;
172 return 0;
173 }
174 snd_printd("snd_device_register busy\n");
175 return -EBUSY;
176 }
177 snd_BUG();
178 return -ENXIO;
179}
180
181EXPORT_SYMBOL(snd_device_register);
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186
187int snd_device_register_all(struct snd_card *card)
188{
189 struct snd_device *dev;
190 int err;
191
192 snd_assert(card != NULL, return -ENXIO);
193 list_for_each_entry(dev, &card->devices, list) {
194 if (dev->state == SNDRV_DEV_BUILD && dev->ops->dev_register) {
195 if ((err = dev->ops->dev_register(dev)) < 0)
196 return err;
197 dev->state = SNDRV_DEV_REGISTERED;
198 }
199 }
200 return 0;
201}
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207int snd_device_disconnect_all(struct snd_card *card)
208{
209 struct snd_device *dev;
210 int err = 0;
211
212 snd_assert(card != NULL, return -ENXIO);
213 list_for_each_entry(dev, &card->devices, list) {
214 if (snd_device_disconnect(card, dev->device_data) < 0)
215 err = -ENXIO;
216 }
217 return err;
218}
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224int snd_device_free_all(struct snd_card *card, snd_device_cmd_t cmd)
225{
226 struct snd_device *dev;
227 int err;
228 unsigned int range_low, range_high;
229
230 snd_assert(card != NULL, return -ENXIO);
231 range_low = cmd * SNDRV_DEV_TYPE_RANGE_SIZE;
232 range_high = range_low + SNDRV_DEV_TYPE_RANGE_SIZE - 1;
233 __again:
234 list_for_each_entry(dev, &card->devices, list) {
235 if (dev->type >= range_low && dev->type <= range_high) {
236 if ((err = snd_device_free(card, dev->device_data)) < 0)
237 return err;
238 goto __again;
239 }
240 }
241 return 0;
242}
243