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> |
da155d5b | 27 | #include <linux/module.h> |
1da177e4 LT |
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 | ||
c1017a4c | 34 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
35 | MODULE_DESCRIPTION("Hardware dependent layer"); |
36 | MODULE_LICENSE("GPL"); | |
37 | ||
f87135f5 | 38 | static LIST_HEAD(snd_hwdep_devices); |
1a60d4c5 | 39 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 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); | |
c461482c | 44 | static int snd_hwdep_dev_disconnect(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 | { | |
f87135f5 CL |
49 | struct snd_hwdep *hwdep; |
50 | ||
9244b2c3 | 51 | list_for_each_entry(hwdep, &snd_hwdep_devices, list) |
f87135f5 CL |
52 | if (hwdep->card == card && hwdep->device == device) |
53 | return hwdep; | |
f87135f5 CL |
54 | return NULL; |
55 | } | |
1da177e4 LT |
56 | |
57 | static loff_t snd_hwdep_llseek(struct file * file, loff_t offset, int orig) | |
58 | { | |
d9a98de2 | 59 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
60 | if (hw->ops.llseek) |
61 | return hw->ops.llseek(hw, file, offset, orig); | |
62 | return -ENXIO; | |
63 | } | |
64 | ||
d9a98de2 TI |
65 | static ssize_t snd_hwdep_read(struct file * file, char __user *buf, |
66 | size_t count, loff_t *offset) | |
1da177e4 | 67 | { |
d9a98de2 | 68 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
69 | if (hw->ops.read) |
70 | return hw->ops.read(hw, buf, count, offset); | |
71 | return -ENXIO; | |
72 | } | |
73 | ||
d9a98de2 TI |
74 | static ssize_t snd_hwdep_write(struct file * file, const char __user *buf, |
75 | size_t count, loff_t *offset) | |
1da177e4 | 76 | { |
d9a98de2 | 77 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
78 | if (hw->ops.write) |
79 | return hw->ops.write(hw, buf, count, offset); | |
80 | return -ENXIO; | |
81 | } | |
82 | ||
83 | static int snd_hwdep_open(struct inode *inode, struct file * file) | |
84 | { | |
85 | int major = imajor(inode); | |
d9a98de2 | 86 | struct snd_hwdep *hw; |
1da177e4 LT |
87 | int err; |
88 | wait_queue_t wait; | |
89 | ||
f1902860 | 90 | if (major == snd_major) { |
f87135f5 CL |
91 | hw = snd_lookup_minor_data(iminor(inode), |
92 | SNDRV_DEVICE_TYPE_HWDEP); | |
1da177e4 | 93 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 94 | } else if (major == SOUND_MAJOR) { |
f87135f5 CL |
95 | hw = snd_lookup_oss_minor_data(iminor(inode), |
96 | SNDRV_OSS_DEVICE_TYPE_DMFM); | |
1da177e4 | 97 | #endif |
f1902860 | 98 | } else |
1da177e4 | 99 | return -ENXIO; |
1da177e4 LT |
100 | if (hw == NULL) |
101 | return -ENODEV; | |
102 | ||
1da177e4 LT |
103 | if (!try_module_get(hw->card->module)) |
104 | return -EFAULT; | |
105 | ||
106 | init_waitqueue_entry(&wait, current); | |
107 | add_wait_queue(&hw->open_wait, &wait); | |
1a60d4c5 | 108 | mutex_lock(&hw->open_mutex); |
1da177e4 LT |
109 | while (1) { |
110 | if (hw->exclusive && hw->used > 0) { | |
111 | err = -EBUSY; | |
112 | break; | |
113 | } | |
345d0b19 TI |
114 | if (!hw->ops.open) { |
115 | err = 0; | |
116 | break; | |
117 | } | |
1da177e4 LT |
118 | err = hw->ops.open(hw, file); |
119 | if (err >= 0) | |
120 | break; | |
121 | if (err == -EAGAIN) { | |
122 | if (file->f_flags & O_NONBLOCK) { | |
123 | err = -EBUSY; | |
124 | break; | |
125 | } | |
126 | } else | |
127 | break; | |
128 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 129 | mutex_unlock(&hw->open_mutex); |
1da177e4 | 130 | schedule(); |
1a60d4c5 | 131 | mutex_lock(&hw->open_mutex); |
1da177e4 LT |
132 | if (signal_pending(current)) { |
133 | err = -ERESTARTSYS; | |
134 | break; | |
135 | } | |
136 | } | |
137 | remove_wait_queue(&hw->open_wait, &wait); | |
138 | if (err >= 0) { | |
139 | err = snd_card_file_add(hw->card, file); | |
140 | if (err >= 0) { | |
141 | file->private_data = hw; | |
142 | hw->used++; | |
143 | } else { | |
144 | if (hw->ops.release) | |
145 | hw->ops.release(hw, file); | |
146 | } | |
147 | } | |
1a60d4c5 | 148 | mutex_unlock(&hw->open_mutex); |
1da177e4 LT |
149 | if (err < 0) |
150 | module_put(hw->card->module); | |
151 | return err; | |
152 | } | |
153 | ||
154 | static int snd_hwdep_release(struct inode *inode, struct file * file) | |
155 | { | |
345d0b19 | 156 | int err = 0; |
d9a98de2 | 157 | struct snd_hwdep *hw = file->private_data; |
104326f8 | 158 | struct module *mod = hw->card->module; |
8fa58af7 | 159 | |
1a60d4c5 | 160 | mutex_lock(&hw->open_mutex); |
8fa58af7 | 161 | if (hw->ops.release) |
1da177e4 | 162 | err = hw->ops.release(hw, file); |
1da177e4 LT |
163 | if (hw->used > 0) |
164 | hw->used--; | |
1a60d4c5 | 165 | mutex_unlock(&hw->open_mutex); |
8fa58af7 KW |
166 | wake_up(&hw->open_wait); |
167 | ||
168 | snd_card_file_remove(hw->card, file); | |
104326f8 | 169 | module_put(mod); |
1da177e4 LT |
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; | |
1a60d4c5 | 275 | mutex_lock(®ister_mutex); |
f7b2bb85 DC |
276 | |
277 | if (device < 0) | |
278 | device = 0; | |
279 | else if (device < SNDRV_MINOR_HWDEPS) | |
280 | device++; | |
281 | else | |
282 | device = SNDRV_MINOR_HWDEPS; | |
283 | ||
1da177e4 | 284 | while (device < SNDRV_MINOR_HWDEPS) { |
f87135f5 | 285 | if (snd_hwdep_search(card, device)) |
1da177e4 LT |
286 | break; |
287 | device++; | |
288 | } | |
289 | if (device >= SNDRV_MINOR_HWDEPS) | |
290 | device = -1; | |
1a60d4c5 | 291 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
292 | if (put_user(device, (int __user *)arg)) |
293 | return -EFAULT; | |
294 | return 0; | |
295 | } | |
296 | case SNDRV_CTL_IOCTL_HWDEP_INFO: | |
297 | { | |
d9a98de2 | 298 | struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg; |
f87135f5 | 299 | int device, err; |
d9a98de2 | 300 | struct snd_hwdep *hwdep; |
1da177e4 LT |
301 | |
302 | if (get_user(device, &info->device)) | |
303 | return -EFAULT; | |
1a60d4c5 | 304 | mutex_lock(®ister_mutex); |
f87135f5 CL |
305 | hwdep = snd_hwdep_search(card, device); |
306 | if (hwdep) | |
307 | err = snd_hwdep_info(hwdep, info); | |
308 | else | |
309 | err = -ENXIO; | |
1a60d4c5 | 310 | mutex_unlock(®ister_mutex); |
f87135f5 | 311 | return err; |
1da177e4 LT |
312 | } |
313 | } | |
314 | return -ENOIOCTLCMD; | |
315 | } | |
316 | ||
317 | #ifdef CONFIG_COMPAT | |
318 | #include "hwdep_compat.c" | |
319 | #else | |
320 | #define snd_hwdep_ioctl_compat NULL | |
321 | #endif | |
322 | ||
323 | /* | |
324 | ||
325 | */ | |
326 | ||
9c2e08c5 | 327 | static const struct file_operations snd_hwdep_f_ops = |
1da177e4 LT |
328 | { |
329 | .owner = THIS_MODULE, | |
330 | .llseek = snd_hwdep_llseek, | |
331 | .read = snd_hwdep_read, | |
332 | .write = snd_hwdep_write, | |
333 | .open = snd_hwdep_open, | |
334 | .release = snd_hwdep_release, | |
335 | .poll = snd_hwdep_poll, | |
336 | .unlocked_ioctl = snd_hwdep_ioctl, | |
337 | .compat_ioctl = snd_hwdep_ioctl_compat, | |
338 | .mmap = snd_hwdep_mmap, | |
339 | }; | |
340 | ||
1da177e4 LT |
341 | /** |
342 | * snd_hwdep_new - create a new hwdep instance | |
343 | * @card: the card instance | |
344 | * @id: the id string | |
345 | * @device: the device index (zero-based) | |
346 | * @rhwdep: the pointer to store the new hwdep instance | |
347 | * | |
348 | * Creates a new hwdep instance with the given index on the card. | |
349 | * The callbacks (hwdep->ops) must be set on the returned instance | |
350 | * after this call manually by the caller. | |
351 | * | |
352 | * Returns zero if successful, or a negative error code on failure. | |
353 | */ | |
d9a98de2 TI |
354 | int snd_hwdep_new(struct snd_card *card, char *id, int device, |
355 | struct snd_hwdep **rhwdep) | |
1da177e4 | 356 | { |
d9a98de2 | 357 | struct snd_hwdep *hwdep; |
1da177e4 | 358 | int err; |
d9a98de2 | 359 | static struct snd_device_ops ops = { |
1da177e4 LT |
360 | .dev_free = snd_hwdep_dev_free, |
361 | .dev_register = snd_hwdep_dev_register, | |
c461482c | 362 | .dev_disconnect = snd_hwdep_dev_disconnect, |
1da177e4 LT |
363 | }; |
364 | ||
7eaa943c TI |
365 | if (snd_BUG_ON(!card)) |
366 | return -ENXIO; | |
367 | if (rhwdep) | |
368 | *rhwdep = NULL; | |
ca2c0966 | 369 | hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL); |
73e77ba0 TI |
370 | if (hwdep == NULL) { |
371 | snd_printk(KERN_ERR "hwdep: cannot allocate\n"); | |
1da177e4 | 372 | return -ENOMEM; |
73e77ba0 | 373 | } |
1da177e4 LT |
374 | hwdep->card = card; |
375 | hwdep->device = device; | |
73e77ba0 | 376 | if (id) |
1da177e4 | 377 | strlcpy(hwdep->id, id, sizeof(hwdep->id)); |
1da177e4 LT |
378 | #ifdef CONFIG_SND_OSSEMUL |
379 | hwdep->oss_type = -1; | |
380 | #endif | |
381 | if ((err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops)) < 0) { | |
382 | snd_hwdep_free(hwdep); | |
383 | return err; | |
384 | } | |
385 | init_waitqueue_head(&hwdep->open_wait); | |
1a60d4c5 | 386 | mutex_init(&hwdep->open_mutex); |
7eaa943c TI |
387 | if (rhwdep) |
388 | *rhwdep = hwdep; | |
1da177e4 LT |
389 | return 0; |
390 | } | |
391 | ||
d9a98de2 | 392 | static int snd_hwdep_free(struct snd_hwdep *hwdep) |
1da177e4 | 393 | { |
7eaa943c TI |
394 | if (!hwdep) |
395 | return 0; | |
1da177e4 LT |
396 | if (hwdep->private_free) |
397 | hwdep->private_free(hwdep); | |
398 | kfree(hwdep); | |
399 | return 0; | |
400 | } | |
401 | ||
d9a98de2 | 402 | static int snd_hwdep_dev_free(struct snd_device *device) |
1da177e4 | 403 | { |
d9a98de2 | 404 | struct snd_hwdep *hwdep = device->device_data; |
1da177e4 LT |
405 | return snd_hwdep_free(hwdep); |
406 | } | |
407 | ||
d9a98de2 | 408 | static int snd_hwdep_dev_register(struct snd_device *device) |
1da177e4 | 409 | { |
d9a98de2 | 410 | struct snd_hwdep *hwdep = device->device_data; |
f87135f5 | 411 | int err; |
1da177e4 LT |
412 | char name[32]; |
413 | ||
1a60d4c5 | 414 | mutex_lock(®ister_mutex); |
f87135f5 | 415 | if (snd_hwdep_search(hwdep->card, hwdep->device)) { |
1a60d4c5 | 416 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
417 | return -EBUSY; |
418 | } | |
f87135f5 | 419 | list_add_tail(&hwdep->list, &snd_hwdep_devices); |
1da177e4 LT |
420 | sprintf(name, "hwC%iD%i", hwdep->card->number, hwdep->device); |
421 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP, | |
422 | hwdep->card, hwdep->device, | |
f87135f5 | 423 | &snd_hwdep_f_ops, hwdep, name)) < 0) { |
1da177e4 LT |
424 | snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n", |
425 | hwdep->card->number, hwdep->device); | |
f87135f5 | 426 | list_del(&hwdep->list); |
1a60d4c5 | 427 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
428 | return err; |
429 | } | |
430 | #ifdef CONFIG_SND_OSSEMUL | |
431 | hwdep->ossreg = 0; | |
432 | if (hwdep->oss_type >= 0) { | |
433 | if ((hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM) && (hwdep->device != 0)) { | |
434 | snd_printk (KERN_WARNING "only hwdep device 0 can be registered as OSS direct FM device!\n"); | |
435 | } else { | |
436 | if (snd_register_oss_device(hwdep->oss_type, | |
437 | hwdep->card, hwdep->device, | |
f87135f5 | 438 | &snd_hwdep_f_ops, hwdep, |
2af677fc | 439 | hwdep->oss_dev) < 0) { |
1da177e4 LT |
440 | snd_printk(KERN_ERR "unable to register OSS compatibility device %i:%i\n", |
441 | hwdep->card->number, hwdep->device); | |
442 | } else | |
443 | hwdep->ossreg = 1; | |
444 | } | |
445 | } | |
446 | #endif | |
1a60d4c5 | 447 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
448 | return 0; |
449 | } | |
450 | ||
c461482c | 451 | static int snd_hwdep_dev_disconnect(struct snd_device *device) |
1da177e4 | 452 | { |
d9a98de2 | 453 | struct snd_hwdep *hwdep = device->device_data; |
1da177e4 | 454 | |
7eaa943c TI |
455 | if (snd_BUG_ON(!hwdep)) |
456 | return -ENXIO; | |
1a60d4c5 | 457 | mutex_lock(®ister_mutex); |
f87135f5 | 458 | if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) { |
1a60d4c5 | 459 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
460 | return -EINVAL; |
461 | } | |
462 | #ifdef CONFIG_SND_OSSEMUL | |
463 | if (hwdep->ossreg) | |
464 | snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device); | |
465 | #endif | |
466 | snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device); | |
c461482c | 467 | list_del_init(&hwdep->list); |
1a60d4c5 | 468 | mutex_unlock(®ister_mutex); |
c461482c | 469 | return 0; |
1da177e4 LT |
470 | } |
471 | ||
e28563cc | 472 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
473 | /* |
474 | * Info interface | |
475 | */ | |
476 | ||
d9a98de2 TI |
477 | static void snd_hwdep_proc_read(struct snd_info_entry *entry, |
478 | struct snd_info_buffer *buffer) | |
1da177e4 | 479 | { |
d9a98de2 | 480 | struct snd_hwdep *hwdep; |
1da177e4 | 481 | |
1a60d4c5 | 482 | mutex_lock(®ister_mutex); |
9244b2c3 | 483 | list_for_each_entry(hwdep, &snd_hwdep_devices, list) |
1da177e4 | 484 | snd_iprintf(buffer, "%02i-%02i: %s\n", |
f87135f5 | 485 | hwdep->card->number, hwdep->device, hwdep->name); |
1a60d4c5 | 486 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
487 | } |
488 | ||
e28563cc | 489 | static struct snd_info_entry *snd_hwdep_proc_entry; |
1da177e4 | 490 | |
e28563cc | 491 | static void __init snd_hwdep_proc_init(void) |
1da177e4 | 492 | { |
d9a98de2 | 493 | struct snd_info_entry *entry; |
1da177e4 | 494 | |
1da177e4 | 495 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) { |
1da177e4 LT |
496 | entry->c.text.read = snd_hwdep_proc_read; |
497 | if (snd_info_register(entry) < 0) { | |
498 | snd_info_free_entry(entry); | |
499 | entry = NULL; | |
500 | } | |
501 | } | |
502 | snd_hwdep_proc_entry = entry; | |
e28563cc TI |
503 | } |
504 | ||
505 | static void __exit snd_hwdep_proc_done(void) | |
506 | { | |
746d4a02 | 507 | snd_info_free_entry(snd_hwdep_proc_entry); |
e28563cc TI |
508 | } |
509 | #else /* !CONFIG_PROC_FS */ | |
510 | #define snd_hwdep_proc_init() | |
511 | #define snd_hwdep_proc_done() | |
512 | #endif /* CONFIG_PROC_FS */ | |
513 | ||
514 | ||
515 | /* | |
516 | * ENTRY functions | |
517 | */ | |
518 | ||
519 | static int __init alsa_hwdep_init(void) | |
520 | { | |
521 | snd_hwdep_proc_init(); | |
1da177e4 LT |
522 | snd_ctl_register_ioctl(snd_hwdep_control_ioctl); |
523 | snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl); | |
524 | return 0; | |
525 | } | |
526 | ||
527 | static void __exit alsa_hwdep_exit(void) | |
528 | { | |
529 | snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl); | |
530 | snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl); | |
e28563cc | 531 | snd_hwdep_proc_done(); |
1da177e4 LT |
532 | } |
533 | ||
534 | module_init(alsa_hwdep_init) | |
535 | module_exit(alsa_hwdep_exit) | |
536 | ||
537 | EXPORT_SYMBOL(snd_hwdep_new); |