Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Hardware dependent layer | |
3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
4 | * | |
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 <sound/driver.h> | |
23 | #include <linux/major.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/smp_lock.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/time.h> | |
1a60d4c5 | 28 | #include <linux/mutex.h> |
1da177e4 LT |
29 | #include <sound/core.h> |
30 | #include <sound/control.h> | |
31 | #include <sound/minors.h> | |
32 | #include <sound/hwdep.h> | |
33 | #include <sound/info.h> | |
34 | ||
35 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); | |
36 | MODULE_DESCRIPTION("Hardware dependent layer"); | |
37 | MODULE_LICENSE("GPL"); | |
38 | ||
f87135f5 | 39 | static LIST_HEAD(snd_hwdep_devices); |
1a60d4c5 | 40 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 41 | |
d9a98de2 TI |
42 | static int snd_hwdep_free(struct snd_hwdep *hwdep); |
43 | static int snd_hwdep_dev_free(struct snd_device *device); | |
44 | static int snd_hwdep_dev_register(struct snd_device *device); | |
45 | static int snd_hwdep_dev_unregister(struct snd_device *device); | |
1da177e4 | 46 | |
1da177e4 | 47 | |
f87135f5 CL |
48 | static struct snd_hwdep *snd_hwdep_search(struct snd_card *card, int device) |
49 | { | |
50 | struct list_head *p; | |
51 | struct snd_hwdep *hwdep; | |
52 | ||
53 | list_for_each(p, &snd_hwdep_devices) { | |
54 | hwdep = list_entry(p, struct snd_hwdep, list); | |
55 | if (hwdep->card == card && hwdep->device == device) | |
56 | return hwdep; | |
57 | } | |
58 | return NULL; | |
59 | } | |
1da177e4 LT |
60 | |
61 | static loff_t snd_hwdep_llseek(struct file * file, loff_t offset, int orig) | |
62 | { | |
d9a98de2 | 63 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
64 | if (hw->ops.llseek) |
65 | return hw->ops.llseek(hw, file, offset, orig); | |
66 | return -ENXIO; | |
67 | } | |
68 | ||
d9a98de2 TI |
69 | static ssize_t snd_hwdep_read(struct file * file, char __user *buf, |
70 | size_t count, loff_t *offset) | |
1da177e4 | 71 | { |
d9a98de2 | 72 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
73 | if (hw->ops.read) |
74 | return hw->ops.read(hw, buf, count, offset); | |
75 | return -ENXIO; | |
76 | } | |
77 | ||
d9a98de2 TI |
78 | static ssize_t snd_hwdep_write(struct file * file, const char __user *buf, |
79 | size_t count, loff_t *offset) | |
1da177e4 | 80 | { |
d9a98de2 | 81 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
82 | if (hw->ops.write) |
83 | return hw->ops.write(hw, buf, count, offset); | |
84 | return -ENXIO; | |
85 | } | |
86 | ||
87 | static int snd_hwdep_open(struct inode *inode, struct file * file) | |
88 | { | |
89 | int major = imajor(inode); | |
d9a98de2 | 90 | struct snd_hwdep *hw; |
1da177e4 LT |
91 | int err; |
92 | wait_queue_t wait; | |
93 | ||
f1902860 | 94 | if (major == snd_major) { |
f87135f5 CL |
95 | hw = snd_lookup_minor_data(iminor(inode), |
96 | SNDRV_DEVICE_TYPE_HWDEP); | |
1da177e4 | 97 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 98 | } else if (major == SOUND_MAJOR) { |
f87135f5 CL |
99 | hw = snd_lookup_oss_minor_data(iminor(inode), |
100 | SNDRV_OSS_DEVICE_TYPE_DMFM); | |
1da177e4 | 101 | #endif |
f1902860 | 102 | } else |
1da177e4 | 103 | return -ENXIO; |
1da177e4 LT |
104 | if (hw == NULL) |
105 | return -ENODEV; | |
106 | ||
107 | if (!hw->ops.open) | |
108 | return -ENXIO; | |
1da177e4 LT |
109 | |
110 | if (!try_module_get(hw->card->module)) | |
111 | return -EFAULT; | |
112 | ||
113 | init_waitqueue_entry(&wait, current); | |
114 | add_wait_queue(&hw->open_wait, &wait); | |
1a60d4c5 | 115 | mutex_lock(&hw->open_mutex); |
1da177e4 LT |
116 | while (1) { |
117 | if (hw->exclusive && hw->used > 0) { | |
118 | err = -EBUSY; | |
119 | break; | |
120 | } | |
121 | err = hw->ops.open(hw, file); | |
122 | if (err >= 0) | |
123 | break; | |
124 | if (err == -EAGAIN) { | |
125 | if (file->f_flags & O_NONBLOCK) { | |
126 | err = -EBUSY; | |
127 | break; | |
128 | } | |
129 | } else | |
130 | break; | |
131 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 132 | mutex_unlock(&hw->open_mutex); |
1da177e4 | 133 | schedule(); |
1a60d4c5 | 134 | mutex_lock(&hw->open_mutex); |
1da177e4 LT |
135 | if (signal_pending(current)) { |
136 | err = -ERESTARTSYS; | |
137 | break; | |
138 | } | |
139 | } | |
140 | remove_wait_queue(&hw->open_wait, &wait); | |
141 | if (err >= 0) { | |
142 | err = snd_card_file_add(hw->card, file); | |
143 | if (err >= 0) { | |
144 | file->private_data = hw; | |
145 | hw->used++; | |
146 | } else { | |
147 | if (hw->ops.release) | |
148 | hw->ops.release(hw, file); | |
149 | } | |
150 | } | |
1a60d4c5 | 151 | mutex_unlock(&hw->open_mutex); |
1da177e4 LT |
152 | if (err < 0) |
153 | module_put(hw->card->module); | |
154 | return err; | |
155 | } | |
156 | ||
157 | static int snd_hwdep_release(struct inode *inode, struct file * file) | |
158 | { | |
159 | int err = -ENXIO; | |
d9a98de2 | 160 | struct snd_hwdep *hw = file->private_data; |
1a60d4c5 | 161 | mutex_lock(&hw->open_mutex); |
1da177e4 LT |
162 | if (hw->ops.release) { |
163 | err = hw->ops.release(hw, file); | |
164 | wake_up(&hw->open_wait); | |
165 | } | |
166 | if (hw->used > 0) | |
167 | hw->used--; | |
168 | snd_card_file_remove(hw->card, file); | |
1a60d4c5 | 169 | mutex_unlock(&hw->open_mutex); |
1da177e4 LT |
170 | module_put(hw->card->module); |
171 | return err; | |
172 | } | |
173 | ||
174 | static unsigned int snd_hwdep_poll(struct file * file, poll_table * wait) | |
175 | { | |
d9a98de2 | 176 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
177 | if (hw->ops.poll) |
178 | return hw->ops.poll(hw, file, wait); | |
179 | return 0; | |
180 | } | |
181 | ||
d9a98de2 TI |
182 | static int snd_hwdep_info(struct snd_hwdep *hw, |
183 | struct snd_hwdep_info __user *_info) | |
1da177e4 | 184 | { |
d9a98de2 | 185 | struct snd_hwdep_info info; |
1da177e4 LT |
186 | |
187 | memset(&info, 0, sizeof(info)); | |
188 | info.card = hw->card->number; | |
189 | strlcpy(info.id, hw->id, sizeof(info.id)); | |
190 | strlcpy(info.name, hw->name, sizeof(info.name)); | |
191 | info.iface = hw->iface; | |
192 | if (copy_to_user(_info, &info, sizeof(info))) | |
193 | return -EFAULT; | |
194 | return 0; | |
195 | } | |
196 | ||
d9a98de2 TI |
197 | static int snd_hwdep_dsp_status(struct snd_hwdep *hw, |
198 | struct snd_hwdep_dsp_status __user *_info) | |
1da177e4 | 199 | { |
d9a98de2 | 200 | struct snd_hwdep_dsp_status info; |
1da177e4 LT |
201 | int err; |
202 | ||
203 | if (! hw->ops.dsp_status) | |
204 | return -ENXIO; | |
205 | memset(&info, 0, sizeof(info)); | |
206 | info.dsp_loaded = hw->dsp_loaded; | |
207 | if ((err = hw->ops.dsp_status(hw, &info)) < 0) | |
208 | return err; | |
209 | if (copy_to_user(_info, &info, sizeof(info))) | |
210 | return -EFAULT; | |
211 | return 0; | |
212 | } | |
213 | ||
d9a98de2 TI |
214 | static int snd_hwdep_dsp_load(struct snd_hwdep *hw, |
215 | struct snd_hwdep_dsp_image __user *_info) | |
1da177e4 | 216 | { |
d9a98de2 | 217 | struct snd_hwdep_dsp_image info; |
1da177e4 LT |
218 | int err; |
219 | ||
220 | if (! hw->ops.dsp_load) | |
221 | return -ENXIO; | |
222 | memset(&info, 0, sizeof(info)); | |
223 | if (copy_from_user(&info, _info, sizeof(info))) | |
224 | return -EFAULT; | |
225 | /* check whether the dsp was already loaded */ | |
226 | if (hw->dsp_loaded & (1 << info.index)) | |
227 | return -EBUSY; | |
228 | if (!access_ok(VERIFY_READ, info.image, info.length)) | |
229 | return -EFAULT; | |
230 | err = hw->ops.dsp_load(hw, &info); | |
231 | if (err < 0) | |
232 | return err; | |
233 | hw->dsp_loaded |= (1 << info.index); | |
234 | return 0; | |
235 | } | |
236 | ||
d9a98de2 TI |
237 | static long snd_hwdep_ioctl(struct file * file, unsigned int cmd, |
238 | unsigned long arg) | |
1da177e4 | 239 | { |
d9a98de2 | 240 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
241 | void __user *argp = (void __user *)arg; |
242 | switch (cmd) { | |
243 | case SNDRV_HWDEP_IOCTL_PVERSION: | |
244 | return put_user(SNDRV_HWDEP_VERSION, (int __user *)argp); | |
245 | case SNDRV_HWDEP_IOCTL_INFO: | |
246 | return snd_hwdep_info(hw, argp); | |
247 | case SNDRV_HWDEP_IOCTL_DSP_STATUS: | |
248 | return snd_hwdep_dsp_status(hw, argp); | |
249 | case SNDRV_HWDEP_IOCTL_DSP_LOAD: | |
250 | return snd_hwdep_dsp_load(hw, argp); | |
251 | } | |
252 | if (hw->ops.ioctl) | |
253 | return hw->ops.ioctl(hw, file, cmd, arg); | |
254 | return -ENOTTY; | |
255 | } | |
256 | ||
257 | static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma) | |
258 | { | |
d9a98de2 | 259 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
260 | if (hw->ops.mmap) |
261 | return hw->ops.mmap(hw, file, vma); | |
262 | return -ENXIO; | |
263 | } | |
264 | ||
d9a98de2 TI |
265 | static int snd_hwdep_control_ioctl(struct snd_card *card, |
266 | struct snd_ctl_file * control, | |
1da177e4 LT |
267 | unsigned int cmd, unsigned long arg) |
268 | { | |
1da177e4 LT |
269 | switch (cmd) { |
270 | case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE: | |
271 | { | |
272 | int device; | |
273 | ||
274 | if (get_user(device, (int __user *)arg)) | |
275 | return -EFAULT; | |
1a60d4c5 | 276 | mutex_lock(®ister_mutex); |
1da177e4 LT |
277 | device = device < 0 ? 0 : device + 1; |
278 | while (device < SNDRV_MINOR_HWDEPS) { | |
f87135f5 | 279 | if (snd_hwdep_search(card, device)) |
1da177e4 LT |
280 | break; |
281 | device++; | |
282 | } | |
283 | if (device >= SNDRV_MINOR_HWDEPS) | |
284 | device = -1; | |
1a60d4c5 | 285 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
286 | if (put_user(device, (int __user *)arg)) |
287 | return -EFAULT; | |
288 | return 0; | |
289 | } | |
290 | case SNDRV_CTL_IOCTL_HWDEP_INFO: | |
291 | { | |
d9a98de2 | 292 | struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg; |
f87135f5 | 293 | int device, err; |
d9a98de2 | 294 | struct snd_hwdep *hwdep; |
1da177e4 LT |
295 | |
296 | if (get_user(device, &info->device)) | |
297 | return -EFAULT; | |
1a60d4c5 | 298 | mutex_lock(®ister_mutex); |
f87135f5 CL |
299 | hwdep = snd_hwdep_search(card, device); |
300 | if (hwdep) | |
301 | err = snd_hwdep_info(hwdep, info); | |
302 | else | |
303 | err = -ENXIO; | |
1a60d4c5 | 304 | mutex_unlock(®ister_mutex); |
f87135f5 | 305 | return err; |
1da177e4 LT |
306 | } |
307 | } | |
308 | return -ENOIOCTLCMD; | |
309 | } | |
310 | ||
311 | #ifdef CONFIG_COMPAT | |
312 | #include "hwdep_compat.c" | |
313 | #else | |
314 | #define snd_hwdep_ioctl_compat NULL | |
315 | #endif | |
316 | ||
317 | /* | |
318 | ||
319 | */ | |
320 | ||
321 | static struct file_operations snd_hwdep_f_ops = | |
322 | { | |
323 | .owner = THIS_MODULE, | |
324 | .llseek = snd_hwdep_llseek, | |
325 | .read = snd_hwdep_read, | |
326 | .write = snd_hwdep_write, | |
327 | .open = snd_hwdep_open, | |
328 | .release = snd_hwdep_release, | |
329 | .poll = snd_hwdep_poll, | |
330 | .unlocked_ioctl = snd_hwdep_ioctl, | |
331 | .compat_ioctl = snd_hwdep_ioctl_compat, | |
332 | .mmap = snd_hwdep_mmap, | |
333 | }; | |
334 | ||
1da177e4 LT |
335 | /** |
336 | * snd_hwdep_new - create a new hwdep instance | |
337 | * @card: the card instance | |
338 | * @id: the id string | |
339 | * @device: the device index (zero-based) | |
340 | * @rhwdep: the pointer to store the new hwdep instance | |
341 | * | |
342 | * Creates a new hwdep instance with the given index on the card. | |
343 | * The callbacks (hwdep->ops) must be set on the returned instance | |
344 | * after this call manually by the caller. | |
345 | * | |
346 | * Returns zero if successful, or a negative error code on failure. | |
347 | */ | |
d9a98de2 TI |
348 | int snd_hwdep_new(struct snd_card *card, char *id, int device, |
349 | struct snd_hwdep **rhwdep) | |
1da177e4 | 350 | { |
d9a98de2 | 351 | struct snd_hwdep *hwdep; |
1da177e4 | 352 | int err; |
d9a98de2 | 353 | static struct snd_device_ops ops = { |
1da177e4 LT |
354 | .dev_free = snd_hwdep_dev_free, |
355 | .dev_register = snd_hwdep_dev_register, | |
356 | .dev_unregister = snd_hwdep_dev_unregister | |
357 | }; | |
358 | ||
359 | snd_assert(rhwdep != NULL, return -EINVAL); | |
360 | *rhwdep = NULL; | |
361 | snd_assert(card != NULL, return -ENXIO); | |
ca2c0966 | 362 | hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL); |
73e77ba0 TI |
363 | if (hwdep == NULL) { |
364 | snd_printk(KERN_ERR "hwdep: cannot allocate\n"); | |
1da177e4 | 365 | return -ENOMEM; |
73e77ba0 | 366 | } |
1da177e4 LT |
367 | hwdep->card = card; |
368 | hwdep->device = device; | |
73e77ba0 | 369 | if (id) |
1da177e4 | 370 | strlcpy(hwdep->id, id, sizeof(hwdep->id)); |
1da177e4 LT |
371 | #ifdef CONFIG_SND_OSSEMUL |
372 | hwdep->oss_type = -1; | |
373 | #endif | |
374 | if ((err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops)) < 0) { | |
375 | snd_hwdep_free(hwdep); | |
376 | return err; | |
377 | } | |
378 | init_waitqueue_head(&hwdep->open_wait); | |
1a60d4c5 | 379 | mutex_init(&hwdep->open_mutex); |
1da177e4 LT |
380 | *rhwdep = hwdep; |
381 | return 0; | |
382 | } | |
383 | ||
d9a98de2 | 384 | static int snd_hwdep_free(struct snd_hwdep *hwdep) |
1da177e4 LT |
385 | { |
386 | snd_assert(hwdep != NULL, return -ENXIO); | |
387 | if (hwdep->private_free) | |
388 | hwdep->private_free(hwdep); | |
389 | kfree(hwdep); | |
390 | return 0; | |
391 | } | |
392 | ||
d9a98de2 | 393 | static int snd_hwdep_dev_free(struct snd_device *device) |
1da177e4 | 394 | { |
d9a98de2 | 395 | struct snd_hwdep *hwdep = device->device_data; |
1da177e4 LT |
396 | return snd_hwdep_free(hwdep); |
397 | } | |
398 | ||
d9a98de2 | 399 | static int snd_hwdep_dev_register(struct snd_device *device) |
1da177e4 | 400 | { |
d9a98de2 | 401 | struct snd_hwdep *hwdep = device->device_data; |
f87135f5 | 402 | int err; |
1da177e4 LT |
403 | char name[32]; |
404 | ||
1a60d4c5 | 405 | mutex_lock(®ister_mutex); |
f87135f5 | 406 | if (snd_hwdep_search(hwdep->card, hwdep->device)) { |
1a60d4c5 | 407 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
408 | return -EBUSY; |
409 | } | |
f87135f5 | 410 | list_add_tail(&hwdep->list, &snd_hwdep_devices); |
1da177e4 LT |
411 | sprintf(name, "hwC%iD%i", hwdep->card->number, hwdep->device); |
412 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP, | |
413 | hwdep->card, hwdep->device, | |
f87135f5 | 414 | &snd_hwdep_f_ops, hwdep, name)) < 0) { |
1da177e4 LT |
415 | snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n", |
416 | hwdep->card->number, hwdep->device); | |
f87135f5 | 417 | list_del(&hwdep->list); |
1a60d4c5 | 418 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
419 | return err; |
420 | } | |
421 | #ifdef CONFIG_SND_OSSEMUL | |
422 | hwdep->ossreg = 0; | |
423 | if (hwdep->oss_type >= 0) { | |
424 | if ((hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM) && (hwdep->device != 0)) { | |
425 | snd_printk (KERN_WARNING "only hwdep device 0 can be registered as OSS direct FM device!\n"); | |
426 | } else { | |
427 | if (snd_register_oss_device(hwdep->oss_type, | |
428 | hwdep->card, hwdep->device, | |
f87135f5 | 429 | &snd_hwdep_f_ops, hwdep, |
2af677fc | 430 | hwdep->oss_dev) < 0) { |
1da177e4 LT |
431 | snd_printk(KERN_ERR "unable to register OSS compatibility device %i:%i\n", |
432 | hwdep->card->number, hwdep->device); | |
433 | } else | |
434 | hwdep->ossreg = 1; | |
435 | } | |
436 | } | |
437 | #endif | |
1a60d4c5 | 438 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
439 | return 0; |
440 | } | |
441 | ||
d9a98de2 | 442 | static int snd_hwdep_dev_unregister(struct snd_device *device) |
1da177e4 | 443 | { |
d9a98de2 | 444 | struct snd_hwdep *hwdep = device->device_data; |
1da177e4 LT |
445 | |
446 | snd_assert(hwdep != NULL, return -ENXIO); | |
1a60d4c5 | 447 | mutex_lock(®ister_mutex); |
f87135f5 | 448 | if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) { |
1a60d4c5 | 449 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
450 | return -EINVAL; |
451 | } | |
452 | #ifdef CONFIG_SND_OSSEMUL | |
453 | if (hwdep->ossreg) | |
454 | snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device); | |
455 | #endif | |
456 | snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device); | |
f87135f5 | 457 | list_del(&hwdep->list); |
1a60d4c5 | 458 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
459 | return snd_hwdep_free(hwdep); |
460 | } | |
461 | ||
e28563cc | 462 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
463 | /* |
464 | * Info interface | |
465 | */ | |
466 | ||
d9a98de2 TI |
467 | static void snd_hwdep_proc_read(struct snd_info_entry *entry, |
468 | struct snd_info_buffer *buffer) | |
1da177e4 | 469 | { |
f87135f5 | 470 | struct list_head *p; |
d9a98de2 | 471 | struct snd_hwdep *hwdep; |
1da177e4 | 472 | |
1a60d4c5 | 473 | mutex_lock(®ister_mutex); |
f87135f5 CL |
474 | list_for_each(p, &snd_hwdep_devices) { |
475 | hwdep = list_entry(p, struct snd_hwdep, list); | |
1da177e4 | 476 | snd_iprintf(buffer, "%02i-%02i: %s\n", |
f87135f5 | 477 | hwdep->card->number, hwdep->device, hwdep->name); |
1da177e4 | 478 | } |
1a60d4c5 | 479 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
480 | } |
481 | ||
e28563cc | 482 | static struct snd_info_entry *snd_hwdep_proc_entry; |
1da177e4 | 483 | |
e28563cc | 484 | static void __init snd_hwdep_proc_init(void) |
1da177e4 | 485 | { |
d9a98de2 | 486 | struct snd_info_entry *entry; |
1da177e4 | 487 | |
1da177e4 | 488 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) { |
f87135f5 | 489 | entry->c.text.read_size = PAGE_SIZE; |
1da177e4 LT |
490 | entry->c.text.read = snd_hwdep_proc_read; |
491 | if (snd_info_register(entry) < 0) { | |
492 | snd_info_free_entry(entry); | |
493 | entry = NULL; | |
494 | } | |
495 | } | |
496 | snd_hwdep_proc_entry = entry; | |
e28563cc TI |
497 | } |
498 | ||
499 | static void __exit snd_hwdep_proc_done(void) | |
500 | { | |
501 | snd_info_unregister(snd_hwdep_proc_entry); | |
502 | } | |
503 | #else /* !CONFIG_PROC_FS */ | |
504 | #define snd_hwdep_proc_init() | |
505 | #define snd_hwdep_proc_done() | |
506 | #endif /* CONFIG_PROC_FS */ | |
507 | ||
508 | ||
509 | /* | |
510 | * ENTRY functions | |
511 | */ | |
512 | ||
513 | static int __init alsa_hwdep_init(void) | |
514 | { | |
515 | snd_hwdep_proc_init(); | |
1da177e4 LT |
516 | snd_ctl_register_ioctl(snd_hwdep_control_ioctl); |
517 | snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl); | |
518 | return 0; | |
519 | } | |
520 | ||
521 | static void __exit alsa_hwdep_exit(void) | |
522 | { | |
523 | snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl); | |
524 | snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl); | |
e28563cc | 525 | snd_hwdep_proc_done(); |
1da177e4 LT |
526 | } |
527 | ||
528 | module_init(alsa_hwdep_init) | |
529 | module_exit(alsa_hwdep_exit) | |
530 | ||
531 | EXPORT_SYMBOL(snd_hwdep_new); |