Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Hardware dependent layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
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 | ||
1da177e4 LT |
22 | #include <linux/major.h> |
23 | #include <linux/init.h> | |
1da177e4 LT |
24 | #include <linux/slab.h> |
25 | #include <linux/time.h> | |
1a60d4c5 | 26 | #include <linux/mutex.h> |
1da177e4 LT |
27 | #include <sound/core.h> |
28 | #include <sound/control.h> | |
29 | #include <sound/minors.h> | |
30 | #include <sound/hwdep.h> | |
31 | #include <sound/info.h> | |
32 | ||
c1017a4c | 33 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
34 | MODULE_DESCRIPTION("Hardware dependent layer"); |
35 | MODULE_LICENSE("GPL"); | |
36 | ||
f87135f5 | 37 | static LIST_HEAD(snd_hwdep_devices); |
1a60d4c5 | 38 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 39 | |
d9a98de2 TI |
40 | static int snd_hwdep_free(struct snd_hwdep *hwdep); |
41 | static int snd_hwdep_dev_free(struct snd_device *device); | |
42 | static int snd_hwdep_dev_register(struct snd_device *device); | |
c461482c | 43 | static int snd_hwdep_dev_disconnect(struct snd_device *device); |
1da177e4 | 44 | |
1da177e4 | 45 | |
f87135f5 CL |
46 | static struct snd_hwdep *snd_hwdep_search(struct snd_card *card, int device) |
47 | { | |
f87135f5 CL |
48 | struct snd_hwdep *hwdep; |
49 | ||
9244b2c3 | 50 | list_for_each_entry(hwdep, &snd_hwdep_devices, list) |
f87135f5 CL |
51 | if (hwdep->card == card && hwdep->device == device) |
52 | return hwdep; | |
f87135f5 CL |
53 | return NULL; |
54 | } | |
1da177e4 LT |
55 | |
56 | static loff_t snd_hwdep_llseek(struct file * file, loff_t offset, int orig) | |
57 | { | |
d9a98de2 | 58 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
59 | if (hw->ops.llseek) |
60 | return hw->ops.llseek(hw, file, offset, orig); | |
61 | return -ENXIO; | |
62 | } | |
63 | ||
d9a98de2 TI |
64 | static ssize_t snd_hwdep_read(struct file * file, char __user *buf, |
65 | size_t count, loff_t *offset) | |
1da177e4 | 66 | { |
d9a98de2 | 67 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
68 | if (hw->ops.read) |
69 | return hw->ops.read(hw, buf, count, offset); | |
70 | return -ENXIO; | |
71 | } | |
72 | ||
d9a98de2 TI |
73 | static ssize_t snd_hwdep_write(struct file * file, const char __user *buf, |
74 | size_t count, loff_t *offset) | |
1da177e4 | 75 | { |
d9a98de2 | 76 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
77 | if (hw->ops.write) |
78 | return hw->ops.write(hw, buf, count, offset); | |
79 | return -ENXIO; | |
80 | } | |
81 | ||
82 | static int snd_hwdep_open(struct inode *inode, struct file * file) | |
83 | { | |
84 | int major = imajor(inode); | |
d9a98de2 | 85 | struct snd_hwdep *hw; |
1da177e4 LT |
86 | int err; |
87 | wait_queue_t wait; | |
88 | ||
f1902860 | 89 | if (major == snd_major) { |
f87135f5 CL |
90 | hw = snd_lookup_minor_data(iminor(inode), |
91 | SNDRV_DEVICE_TYPE_HWDEP); | |
1da177e4 | 92 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 93 | } else if (major == SOUND_MAJOR) { |
f87135f5 CL |
94 | hw = snd_lookup_oss_minor_data(iminor(inode), |
95 | SNDRV_OSS_DEVICE_TYPE_DMFM); | |
1da177e4 | 96 | #endif |
f1902860 | 97 | } else |
1da177e4 | 98 | return -ENXIO; |
1da177e4 LT |
99 | if (hw == NULL) |
100 | return -ENODEV; | |
101 | ||
102 | if (!hw->ops.open) | |
103 | return -ENXIO; | |
1da177e4 LT |
104 | |
105 | if (!try_module_get(hw->card->module)) | |
106 | return -EFAULT; | |
107 | ||
108 | init_waitqueue_entry(&wait, current); | |
109 | add_wait_queue(&hw->open_wait, &wait); | |
1a60d4c5 | 110 | mutex_lock(&hw->open_mutex); |
1da177e4 LT |
111 | while (1) { |
112 | if (hw->exclusive && hw->used > 0) { | |
113 | err = -EBUSY; | |
114 | break; | |
115 | } | |
116 | err = hw->ops.open(hw, file); | |
117 | if (err >= 0) | |
118 | break; | |
119 | if (err == -EAGAIN) { | |
120 | if (file->f_flags & O_NONBLOCK) { | |
121 | err = -EBUSY; | |
122 | break; | |
123 | } | |
124 | } else | |
125 | break; | |
126 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 127 | mutex_unlock(&hw->open_mutex); |
1da177e4 | 128 | schedule(); |
1a60d4c5 | 129 | mutex_lock(&hw->open_mutex); |
1da177e4 LT |
130 | if (signal_pending(current)) { |
131 | err = -ERESTARTSYS; | |
132 | break; | |
133 | } | |
134 | } | |
135 | remove_wait_queue(&hw->open_wait, &wait); | |
136 | if (err >= 0) { | |
137 | err = snd_card_file_add(hw->card, file); | |
138 | if (err >= 0) { | |
139 | file->private_data = hw; | |
140 | hw->used++; | |
141 | } else { | |
142 | if (hw->ops.release) | |
143 | hw->ops.release(hw, file); | |
144 | } | |
145 | } | |
1a60d4c5 | 146 | mutex_unlock(&hw->open_mutex); |
1da177e4 LT |
147 | if (err < 0) |
148 | module_put(hw->card->module); | |
149 | return err; | |
150 | } | |
151 | ||
152 | static int snd_hwdep_release(struct inode *inode, struct file * file) | |
153 | { | |
154 | int err = -ENXIO; | |
d9a98de2 | 155 | struct snd_hwdep *hw = file->private_data; |
104326f8 | 156 | struct module *mod = hw->card->module; |
8fa58af7 | 157 | |
1a60d4c5 | 158 | mutex_lock(&hw->open_mutex); |
8fa58af7 | 159 | if (hw->ops.release) |
1da177e4 | 160 | err = hw->ops.release(hw, file); |
1da177e4 LT |
161 | if (hw->used > 0) |
162 | hw->used--; | |
1a60d4c5 | 163 | mutex_unlock(&hw->open_mutex); |
8fa58af7 KW |
164 | wake_up(&hw->open_wait); |
165 | ||
166 | snd_card_file_remove(hw->card, file); | |
104326f8 | 167 | module_put(mod); |
1da177e4 LT |
168 | return err; |
169 | } | |
170 | ||
171 | static unsigned int snd_hwdep_poll(struct file * file, poll_table * wait) | |
172 | { | |
d9a98de2 | 173 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
174 | if (hw->ops.poll) |
175 | return hw->ops.poll(hw, file, wait); | |
176 | return 0; | |
177 | } | |
178 | ||
d9a98de2 TI |
179 | static int snd_hwdep_info(struct snd_hwdep *hw, |
180 | struct snd_hwdep_info __user *_info) | |
1da177e4 | 181 | { |
d9a98de2 | 182 | struct snd_hwdep_info info; |
1da177e4 LT |
183 | |
184 | memset(&info, 0, sizeof(info)); | |
185 | info.card = hw->card->number; | |
186 | strlcpy(info.id, hw->id, sizeof(info.id)); | |
187 | strlcpy(info.name, hw->name, sizeof(info.name)); | |
188 | info.iface = hw->iface; | |
189 | if (copy_to_user(_info, &info, sizeof(info))) | |
190 | return -EFAULT; | |
191 | return 0; | |
192 | } | |
193 | ||
d9a98de2 TI |
194 | static int snd_hwdep_dsp_status(struct snd_hwdep *hw, |
195 | struct snd_hwdep_dsp_status __user *_info) | |
1da177e4 | 196 | { |
d9a98de2 | 197 | struct snd_hwdep_dsp_status info; |
1da177e4 LT |
198 | int err; |
199 | ||
200 | if (! hw->ops.dsp_status) | |
201 | return -ENXIO; | |
202 | memset(&info, 0, sizeof(info)); | |
203 | info.dsp_loaded = hw->dsp_loaded; | |
204 | if ((err = hw->ops.dsp_status(hw, &info)) < 0) | |
205 | return err; | |
206 | if (copy_to_user(_info, &info, sizeof(info))) | |
207 | return -EFAULT; | |
208 | return 0; | |
209 | } | |
210 | ||
d9a98de2 TI |
211 | static int snd_hwdep_dsp_load(struct snd_hwdep *hw, |
212 | struct snd_hwdep_dsp_image __user *_info) | |
1da177e4 | 213 | { |
d9a98de2 | 214 | struct snd_hwdep_dsp_image info; |
1da177e4 LT |
215 | int err; |
216 | ||
217 | if (! hw->ops.dsp_load) | |
218 | return -ENXIO; | |
219 | memset(&info, 0, sizeof(info)); | |
220 | if (copy_from_user(&info, _info, sizeof(info))) | |
221 | return -EFAULT; | |
222 | /* check whether the dsp was already loaded */ | |
223 | if (hw->dsp_loaded & (1 << info.index)) | |
224 | return -EBUSY; | |
225 | if (!access_ok(VERIFY_READ, info.image, info.length)) | |
226 | return -EFAULT; | |
227 | err = hw->ops.dsp_load(hw, &info); | |
228 | if (err < 0) | |
229 | return err; | |
230 | hw->dsp_loaded |= (1 << info.index); | |
231 | return 0; | |
232 | } | |
233 | ||
d9a98de2 TI |
234 | static long snd_hwdep_ioctl(struct file * file, unsigned int cmd, |
235 | unsigned long arg) | |
1da177e4 | 236 | { |
d9a98de2 | 237 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
238 | void __user *argp = (void __user *)arg; |
239 | switch (cmd) { | |
240 | case SNDRV_HWDEP_IOCTL_PVERSION: | |
241 | return put_user(SNDRV_HWDEP_VERSION, (int __user *)argp); | |
242 | case SNDRV_HWDEP_IOCTL_INFO: | |
243 | return snd_hwdep_info(hw, argp); | |
244 | case SNDRV_HWDEP_IOCTL_DSP_STATUS: | |
245 | return snd_hwdep_dsp_status(hw, argp); | |
246 | case SNDRV_HWDEP_IOCTL_DSP_LOAD: | |
247 | return snd_hwdep_dsp_load(hw, argp); | |
248 | } | |
249 | if (hw->ops.ioctl) | |
250 | return hw->ops.ioctl(hw, file, cmd, arg); | |
251 | return -ENOTTY; | |
252 | } | |
253 | ||
254 | static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma) | |
255 | { | |
d9a98de2 | 256 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
257 | if (hw->ops.mmap) |
258 | return hw->ops.mmap(hw, file, vma); | |
259 | return -ENXIO; | |
260 | } | |
261 | ||
d9a98de2 TI |
262 | static int snd_hwdep_control_ioctl(struct snd_card *card, |
263 | struct snd_ctl_file * control, | |
1da177e4 LT |
264 | unsigned int cmd, unsigned long arg) |
265 | { | |
1da177e4 LT |
266 | switch (cmd) { |
267 | case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE: | |
268 | { | |
269 | int device; | |
270 | ||
271 | if (get_user(device, (int __user *)arg)) | |
272 | return -EFAULT; | |
1a60d4c5 | 273 | mutex_lock(®ister_mutex); |
1da177e4 LT |
274 | device = device < 0 ? 0 : device + 1; |
275 | while (device < SNDRV_MINOR_HWDEPS) { | |
f87135f5 | 276 | if (snd_hwdep_search(card, device)) |
1da177e4 LT |
277 | break; |
278 | device++; | |
279 | } | |
280 | if (device >= SNDRV_MINOR_HWDEPS) | |
281 | device = -1; | |
1a60d4c5 | 282 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
283 | if (put_user(device, (int __user *)arg)) |
284 | return -EFAULT; | |
285 | return 0; | |
286 | } | |
287 | case SNDRV_CTL_IOCTL_HWDEP_INFO: | |
288 | { | |
d9a98de2 | 289 | struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg; |
f87135f5 | 290 | int device, err; |
d9a98de2 | 291 | struct snd_hwdep *hwdep; |
1da177e4 LT |
292 | |
293 | if (get_user(device, &info->device)) | |
294 | return -EFAULT; | |
1a60d4c5 | 295 | mutex_lock(®ister_mutex); |
f87135f5 CL |
296 | hwdep = snd_hwdep_search(card, device); |
297 | if (hwdep) | |
298 | err = snd_hwdep_info(hwdep, info); | |
299 | else | |
300 | err = -ENXIO; | |
1a60d4c5 | 301 | mutex_unlock(®ister_mutex); |
f87135f5 | 302 | return err; |
1da177e4 LT |
303 | } |
304 | } | |
305 | return -ENOIOCTLCMD; | |
306 | } | |
307 | ||
308 | #ifdef CONFIG_COMPAT | |
309 | #include "hwdep_compat.c" | |
310 | #else | |
311 | #define snd_hwdep_ioctl_compat NULL | |
312 | #endif | |
313 | ||
314 | /* | |
315 | ||
316 | */ | |
317 | ||
9c2e08c5 | 318 | static const struct file_operations snd_hwdep_f_ops = |
1da177e4 LT |
319 | { |
320 | .owner = THIS_MODULE, | |
321 | .llseek = snd_hwdep_llseek, | |
322 | .read = snd_hwdep_read, | |
323 | .write = snd_hwdep_write, | |
324 | .open = snd_hwdep_open, | |
325 | .release = snd_hwdep_release, | |
326 | .poll = snd_hwdep_poll, | |
327 | .unlocked_ioctl = snd_hwdep_ioctl, | |
328 | .compat_ioctl = snd_hwdep_ioctl_compat, | |
329 | .mmap = snd_hwdep_mmap, | |
330 | }; | |
331 | ||
1da177e4 LT |
332 | /** |
333 | * snd_hwdep_new - create a new hwdep instance | |
334 | * @card: the card instance | |
335 | * @id: the id string | |
336 | * @device: the device index (zero-based) | |
337 | * @rhwdep: the pointer to store the new hwdep instance | |
338 | * | |
339 | * Creates a new hwdep instance with the given index on the card. | |
340 | * The callbacks (hwdep->ops) must be set on the returned instance | |
341 | * after this call manually by the caller. | |
342 | * | |
343 | * Returns zero if successful, or a negative error code on failure. | |
344 | */ | |
d9a98de2 TI |
345 | int snd_hwdep_new(struct snd_card *card, char *id, int device, |
346 | struct snd_hwdep **rhwdep) | |
1da177e4 | 347 | { |
d9a98de2 | 348 | struct snd_hwdep *hwdep; |
1da177e4 | 349 | int err; |
d9a98de2 | 350 | static struct snd_device_ops ops = { |
1da177e4 LT |
351 | .dev_free = snd_hwdep_dev_free, |
352 | .dev_register = snd_hwdep_dev_register, | |
c461482c | 353 | .dev_disconnect = snd_hwdep_dev_disconnect, |
1da177e4 LT |
354 | }; |
355 | ||
7eaa943c TI |
356 | if (snd_BUG_ON(!card)) |
357 | return -ENXIO; | |
358 | if (rhwdep) | |
359 | *rhwdep = NULL; | |
ca2c0966 | 360 | hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL); |
73e77ba0 TI |
361 | if (hwdep == NULL) { |
362 | snd_printk(KERN_ERR "hwdep: cannot allocate\n"); | |
1da177e4 | 363 | return -ENOMEM; |
73e77ba0 | 364 | } |
1da177e4 LT |
365 | hwdep->card = card; |
366 | hwdep->device = device; | |
73e77ba0 | 367 | if (id) |
1da177e4 | 368 | strlcpy(hwdep->id, id, sizeof(hwdep->id)); |
1da177e4 LT |
369 | #ifdef CONFIG_SND_OSSEMUL |
370 | hwdep->oss_type = -1; | |
371 | #endif | |
372 | if ((err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops)) < 0) { | |
373 | snd_hwdep_free(hwdep); | |
374 | return err; | |
375 | } | |
376 | init_waitqueue_head(&hwdep->open_wait); | |
1a60d4c5 | 377 | mutex_init(&hwdep->open_mutex); |
7eaa943c TI |
378 | if (rhwdep) |
379 | *rhwdep = hwdep; | |
1da177e4 LT |
380 | return 0; |
381 | } | |
382 | ||
d9a98de2 | 383 | static int snd_hwdep_free(struct snd_hwdep *hwdep) |
1da177e4 | 384 | { |
7eaa943c TI |
385 | if (!hwdep) |
386 | return 0; | |
1da177e4 LT |
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 | ||
c461482c | 442 | static int snd_hwdep_dev_disconnect(struct snd_device *device) |
1da177e4 | 443 | { |
d9a98de2 | 444 | struct snd_hwdep *hwdep = device->device_data; |
1da177e4 | 445 | |
7eaa943c TI |
446 | if (snd_BUG_ON(!hwdep)) |
447 | return -ENXIO; | |
1a60d4c5 | 448 | mutex_lock(®ister_mutex); |
f87135f5 | 449 | if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) { |
1a60d4c5 | 450 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
451 | return -EINVAL; |
452 | } | |
453 | #ifdef CONFIG_SND_OSSEMUL | |
454 | if (hwdep->ossreg) | |
455 | snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device); | |
456 | #endif | |
457 | snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device); | |
c461482c | 458 | list_del_init(&hwdep->list); |
1a60d4c5 | 459 | mutex_unlock(®ister_mutex); |
c461482c | 460 | return 0; |
1da177e4 LT |
461 | } |
462 | ||
e28563cc | 463 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
464 | /* |
465 | * Info interface | |
466 | */ | |
467 | ||
d9a98de2 TI |
468 | static void snd_hwdep_proc_read(struct snd_info_entry *entry, |
469 | struct snd_info_buffer *buffer) | |
1da177e4 | 470 | { |
d9a98de2 | 471 | struct snd_hwdep *hwdep; |
1da177e4 | 472 | |
1a60d4c5 | 473 | mutex_lock(®ister_mutex); |
9244b2c3 | 474 | list_for_each_entry(hwdep, &snd_hwdep_devices, list) |
1da177e4 | 475 | snd_iprintf(buffer, "%02i-%02i: %s\n", |
f87135f5 | 476 | hwdep->card->number, hwdep->device, hwdep->name); |
1a60d4c5 | 477 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
478 | } |
479 | ||
e28563cc | 480 | static struct snd_info_entry *snd_hwdep_proc_entry; |
1da177e4 | 481 | |
e28563cc | 482 | static void __init snd_hwdep_proc_init(void) |
1da177e4 | 483 | { |
d9a98de2 | 484 | struct snd_info_entry *entry; |
1da177e4 | 485 | |
1da177e4 | 486 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) { |
1da177e4 LT |
487 | entry->c.text.read = snd_hwdep_proc_read; |
488 | if (snd_info_register(entry) < 0) { | |
489 | snd_info_free_entry(entry); | |
490 | entry = NULL; | |
491 | } | |
492 | } | |
493 | snd_hwdep_proc_entry = entry; | |
e28563cc TI |
494 | } |
495 | ||
496 | static void __exit snd_hwdep_proc_done(void) | |
497 | { | |
746d4a02 | 498 | snd_info_free_entry(snd_hwdep_proc_entry); |
e28563cc TI |
499 | } |
500 | #else /* !CONFIG_PROC_FS */ | |
501 | #define snd_hwdep_proc_init() | |
502 | #define snd_hwdep_proc_done() | |
503 | #endif /* CONFIG_PROC_FS */ | |
504 | ||
505 | ||
506 | /* | |
507 | * ENTRY functions | |
508 | */ | |
509 | ||
510 | static int __init alsa_hwdep_init(void) | |
511 | { | |
512 | snd_hwdep_proc_init(); | |
1da177e4 LT |
513 | snd_ctl_register_ioctl(snd_hwdep_control_ioctl); |
514 | snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl); | |
515 | return 0; | |
516 | } | |
517 | ||
518 | static void __exit alsa_hwdep_exit(void) | |
519 | { | |
520 | snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl); | |
521 | snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl); | |
e28563cc | 522 | snd_hwdep_proc_done(); |
1da177e4 LT |
523 | } |
524 | ||
525 | module_init(alsa_hwdep_init) | |
526 | module_exit(alsa_hwdep_exit) | |
527 | ||
528 | EXPORT_SYMBOL(snd_hwdep_new); |