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