Commit | Line | Data |
---|---|---|
1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Hardware dependent layer | |
c1017a4c | 4 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
5 | */ |
6 | ||
1da177e4 LT |
7 | #include <linux/major.h> |
8 | #include <linux/init.h> | |
1da177e4 LT |
9 | #include <linux/slab.h> |
10 | #include <linux/time.h> | |
1a60d4c5 | 11 | #include <linux/mutex.h> |
da155d5b | 12 | #include <linux/module.h> |
174cd4b1 | 13 | #include <linux/sched/signal.h> |
1da177e4 LT |
14 | #include <sound/core.h> |
15 | #include <sound/control.h> | |
16 | #include <sound/minors.h> | |
17 | #include <sound/hwdep.h> | |
18 | #include <sound/info.h> | |
19 | ||
c1017a4c | 20 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
21 | MODULE_DESCRIPTION("Hardware dependent layer"); |
22 | MODULE_LICENSE("GPL"); | |
23 | ||
f87135f5 | 24 | static LIST_HEAD(snd_hwdep_devices); |
1a60d4c5 | 25 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 26 | |
d9a98de2 TI |
27 | static int snd_hwdep_dev_free(struct snd_device *device); |
28 | static int snd_hwdep_dev_register(struct snd_device *device); | |
c461482c | 29 | static int snd_hwdep_dev_disconnect(struct snd_device *device); |
1da177e4 | 30 | |
1da177e4 | 31 | |
f87135f5 CL |
32 | static struct snd_hwdep *snd_hwdep_search(struct snd_card *card, int device) |
33 | { | |
f87135f5 CL |
34 | struct snd_hwdep *hwdep; |
35 | ||
9244b2c3 | 36 | list_for_each_entry(hwdep, &snd_hwdep_devices, list) |
f87135f5 CL |
37 | if (hwdep->card == card && hwdep->device == device) |
38 | return hwdep; | |
f87135f5 CL |
39 | return NULL; |
40 | } | |
1da177e4 LT |
41 | |
42 | static loff_t snd_hwdep_llseek(struct file * file, loff_t offset, int orig) | |
43 | { | |
d9a98de2 | 44 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
45 | if (hw->ops.llseek) |
46 | return hw->ops.llseek(hw, file, offset, orig); | |
47 | return -ENXIO; | |
48 | } | |
49 | ||
d9a98de2 TI |
50 | static ssize_t snd_hwdep_read(struct file * file, char __user *buf, |
51 | size_t count, loff_t *offset) | |
1da177e4 | 52 | { |
d9a98de2 | 53 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
54 | if (hw->ops.read) |
55 | return hw->ops.read(hw, buf, count, offset); | |
56 | return -ENXIO; | |
57 | } | |
58 | ||
d9a98de2 TI |
59 | static ssize_t snd_hwdep_write(struct file * file, const char __user *buf, |
60 | size_t count, loff_t *offset) | |
1da177e4 | 61 | { |
d9a98de2 | 62 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
63 | if (hw->ops.write) |
64 | return hw->ops.write(hw, buf, count, offset); | |
65 | return -ENXIO; | |
66 | } | |
67 | ||
68 | static int snd_hwdep_open(struct inode *inode, struct file * file) | |
69 | { | |
70 | int major = imajor(inode); | |
d9a98de2 | 71 | struct snd_hwdep *hw; |
1da177e4 | 72 | int err; |
ac6424b9 | 73 | wait_queue_entry_t wait; |
1da177e4 | 74 | |
f1902860 | 75 | if (major == snd_major) { |
f87135f5 CL |
76 | hw = snd_lookup_minor_data(iminor(inode), |
77 | SNDRV_DEVICE_TYPE_HWDEP); | |
1da177e4 | 78 | #ifdef CONFIG_SND_OSSEMUL |
f1902860 | 79 | } else if (major == SOUND_MAJOR) { |
f87135f5 CL |
80 | hw = snd_lookup_oss_minor_data(iminor(inode), |
81 | SNDRV_OSS_DEVICE_TYPE_DMFM); | |
1da177e4 | 82 | #endif |
f1902860 | 83 | } else |
1da177e4 | 84 | return -ENXIO; |
1da177e4 LT |
85 | if (hw == NULL) |
86 | return -ENODEV; | |
87 | ||
a0830dbd TI |
88 | if (!try_module_get(hw->card->module)) { |
89 | snd_card_unref(hw->card); | |
1da177e4 | 90 | return -EFAULT; |
a0830dbd | 91 | } |
1da177e4 LT |
92 | |
93 | init_waitqueue_entry(&wait, current); | |
94 | add_wait_queue(&hw->open_wait, &wait); | |
1a60d4c5 | 95 | mutex_lock(&hw->open_mutex); |
1da177e4 LT |
96 | while (1) { |
97 | if (hw->exclusive && hw->used > 0) { | |
98 | err = -EBUSY; | |
99 | break; | |
100 | } | |
345d0b19 TI |
101 | if (!hw->ops.open) { |
102 | err = 0; | |
103 | break; | |
104 | } | |
1da177e4 LT |
105 | err = hw->ops.open(hw, file); |
106 | if (err >= 0) | |
107 | break; | |
108 | if (err == -EAGAIN) { | |
109 | if (file->f_flags & O_NONBLOCK) { | |
110 | err = -EBUSY; | |
111 | break; | |
112 | } | |
113 | } else | |
114 | break; | |
115 | set_current_state(TASK_INTERRUPTIBLE); | |
1a60d4c5 | 116 | mutex_unlock(&hw->open_mutex); |
1da177e4 | 117 | schedule(); |
1a60d4c5 | 118 | mutex_lock(&hw->open_mutex); |
0914f796 TI |
119 | if (hw->card->shutdown) { |
120 | err = -ENODEV; | |
121 | break; | |
122 | } | |
1da177e4 LT |
123 | if (signal_pending(current)) { |
124 | err = -ERESTARTSYS; | |
125 | break; | |
126 | } | |
127 | } | |
128 | remove_wait_queue(&hw->open_wait, &wait); | |
129 | if (err >= 0) { | |
130 | err = snd_card_file_add(hw->card, file); | |
131 | if (err >= 0) { | |
132 | file->private_data = hw; | |
133 | hw->used++; | |
134 | } else { | |
135 | if (hw->ops.release) | |
136 | hw->ops.release(hw, file); | |
137 | } | |
138 | } | |
1a60d4c5 | 139 | mutex_unlock(&hw->open_mutex); |
1da177e4 LT |
140 | if (err < 0) |
141 | module_put(hw->card->module); | |
a0830dbd | 142 | snd_card_unref(hw->card); |
1da177e4 LT |
143 | return err; |
144 | } | |
145 | ||
146 | static int snd_hwdep_release(struct inode *inode, struct file * file) | |
147 | { | |
345d0b19 | 148 | int err = 0; |
d9a98de2 | 149 | struct snd_hwdep *hw = file->private_data; |
104326f8 | 150 | struct module *mod = hw->card->module; |
8fa58af7 | 151 | |
1a60d4c5 | 152 | mutex_lock(&hw->open_mutex); |
8fa58af7 | 153 | if (hw->ops.release) |
1da177e4 | 154 | err = hw->ops.release(hw, file); |
1da177e4 LT |
155 | if (hw->used > 0) |
156 | hw->used--; | |
1a60d4c5 | 157 | mutex_unlock(&hw->open_mutex); |
8fa58af7 KW |
158 | wake_up(&hw->open_wait); |
159 | ||
160 | snd_card_file_remove(hw->card, file); | |
104326f8 | 161 | module_put(mod); |
1da177e4 LT |
162 | return err; |
163 | } | |
164 | ||
680ef72a | 165 | static __poll_t snd_hwdep_poll(struct file * file, poll_table * wait) |
1da177e4 | 166 | { |
d9a98de2 | 167 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
168 | if (hw->ops.poll) |
169 | return hw->ops.poll(hw, file, wait); | |
170 | return 0; | |
171 | } | |
172 | ||
d9a98de2 TI |
173 | static int snd_hwdep_info(struct snd_hwdep *hw, |
174 | struct snd_hwdep_info __user *_info) | |
1da177e4 | 175 | { |
d9a98de2 | 176 | struct snd_hwdep_info info; |
1da177e4 LT |
177 | |
178 | memset(&info, 0, sizeof(info)); | |
179 | info.card = hw->card->number; | |
180 | strlcpy(info.id, hw->id, sizeof(info.id)); | |
181 | strlcpy(info.name, hw->name, sizeof(info.name)); | |
182 | info.iface = hw->iface; | |
183 | if (copy_to_user(_info, &info, sizeof(info))) | |
184 | return -EFAULT; | |
185 | return 0; | |
186 | } | |
187 | ||
d9a98de2 TI |
188 | static int snd_hwdep_dsp_status(struct snd_hwdep *hw, |
189 | struct snd_hwdep_dsp_status __user *_info) | |
1da177e4 | 190 | { |
d9a98de2 | 191 | struct snd_hwdep_dsp_status info; |
1da177e4 LT |
192 | int err; |
193 | ||
194 | if (! hw->ops.dsp_status) | |
195 | return -ENXIO; | |
196 | memset(&info, 0, sizeof(info)); | |
197 | info.dsp_loaded = hw->dsp_loaded; | |
198 | if ((err = hw->ops.dsp_status(hw, &info)) < 0) | |
199 | return err; | |
200 | if (copy_to_user(_info, &info, sizeof(info))) | |
201 | return -EFAULT; | |
202 | return 0; | |
203 | } | |
204 | ||
d9a98de2 TI |
205 | static int snd_hwdep_dsp_load(struct snd_hwdep *hw, |
206 | struct snd_hwdep_dsp_image __user *_info) | |
1da177e4 | 207 | { |
d9a98de2 | 208 | struct snd_hwdep_dsp_image info; |
1da177e4 LT |
209 | int err; |
210 | ||
211 | if (! hw->ops.dsp_load) | |
212 | return -ENXIO; | |
213 | memset(&info, 0, sizeof(info)); | |
214 | if (copy_from_user(&info, _info, sizeof(info))) | |
215 | return -EFAULT; | |
c4fd4379 DC |
216 | if (info.index >= 32) |
217 | return -EINVAL; | |
1da177e4 LT |
218 | /* check whether the dsp was already loaded */ |
219 | if (hw->dsp_loaded & (1 << info.index)) | |
220 | return -EBUSY; | |
1da177e4 LT |
221 | err = hw->ops.dsp_load(hw, &info); |
222 | if (err < 0) | |
223 | return err; | |
224 | hw->dsp_loaded |= (1 << info.index); | |
225 | return 0; | |
226 | } | |
227 | ||
d9a98de2 TI |
228 | static long snd_hwdep_ioctl(struct file * file, unsigned int cmd, |
229 | unsigned long arg) | |
1da177e4 | 230 | { |
d9a98de2 | 231 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
232 | void __user *argp = (void __user *)arg; |
233 | switch (cmd) { | |
234 | case SNDRV_HWDEP_IOCTL_PVERSION: | |
235 | return put_user(SNDRV_HWDEP_VERSION, (int __user *)argp); | |
236 | case SNDRV_HWDEP_IOCTL_INFO: | |
237 | return snd_hwdep_info(hw, argp); | |
238 | case SNDRV_HWDEP_IOCTL_DSP_STATUS: | |
239 | return snd_hwdep_dsp_status(hw, argp); | |
240 | case SNDRV_HWDEP_IOCTL_DSP_LOAD: | |
241 | return snd_hwdep_dsp_load(hw, argp); | |
242 | } | |
243 | if (hw->ops.ioctl) | |
244 | return hw->ops.ioctl(hw, file, cmd, arg); | |
245 | return -ENOTTY; | |
246 | } | |
247 | ||
248 | static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma) | |
249 | { | |
d9a98de2 | 250 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
251 | if (hw->ops.mmap) |
252 | return hw->ops.mmap(hw, file, vma); | |
253 | return -ENXIO; | |
254 | } | |
255 | ||
d9a98de2 TI |
256 | static int snd_hwdep_control_ioctl(struct snd_card *card, |
257 | struct snd_ctl_file * control, | |
1da177e4 LT |
258 | unsigned int cmd, unsigned long arg) |
259 | { | |
1da177e4 LT |
260 | switch (cmd) { |
261 | case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE: | |
262 | { | |
263 | int device; | |
264 | ||
265 | if (get_user(device, (int __user *)arg)) | |
266 | return -EFAULT; | |
1a60d4c5 | 267 | mutex_lock(®ister_mutex); |
f7b2bb85 DC |
268 | |
269 | if (device < 0) | |
270 | device = 0; | |
271 | else if (device < SNDRV_MINOR_HWDEPS) | |
272 | device++; | |
273 | else | |
274 | device = SNDRV_MINOR_HWDEPS; | |
275 | ||
1da177e4 | 276 | while (device < SNDRV_MINOR_HWDEPS) { |
f87135f5 | 277 | if (snd_hwdep_search(card, device)) |
1da177e4 LT |
278 | break; |
279 | device++; | |
280 | } | |
281 | if (device >= SNDRV_MINOR_HWDEPS) | |
282 | device = -1; | |
1a60d4c5 | 283 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
284 | if (put_user(device, (int __user *)arg)) |
285 | return -EFAULT; | |
286 | return 0; | |
287 | } | |
288 | case SNDRV_CTL_IOCTL_HWDEP_INFO: | |
289 | { | |
d9a98de2 | 290 | struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg; |
f87135f5 | 291 | int device, err; |
d9a98de2 | 292 | struct snd_hwdep *hwdep; |
1da177e4 LT |
293 | |
294 | if (get_user(device, &info->device)) | |
295 | return -EFAULT; | |
1a60d4c5 | 296 | mutex_lock(®ister_mutex); |
f87135f5 CL |
297 | hwdep = snd_hwdep_search(card, device); |
298 | if (hwdep) | |
299 | err = snd_hwdep_info(hwdep, info); | |
300 | else | |
301 | err = -ENXIO; | |
1a60d4c5 | 302 | mutex_unlock(®ister_mutex); |
f87135f5 | 303 | return err; |
1da177e4 LT |
304 | } |
305 | } | |
306 | return -ENOIOCTLCMD; | |
307 | } | |
308 | ||
309 | #ifdef CONFIG_COMPAT | |
310 | #include "hwdep_compat.c" | |
311 | #else | |
312 | #define snd_hwdep_ioctl_compat NULL | |
313 | #endif | |
314 | ||
315 | /* | |
316 | ||
317 | */ | |
318 | ||
9c2e08c5 | 319 | static const struct file_operations snd_hwdep_f_ops = |
1da177e4 LT |
320 | { |
321 | .owner = THIS_MODULE, | |
322 | .llseek = snd_hwdep_llseek, | |
323 | .read = snd_hwdep_read, | |
324 | .write = snd_hwdep_write, | |
325 | .open = snd_hwdep_open, | |
326 | .release = snd_hwdep_release, | |
327 | .poll = snd_hwdep_poll, | |
328 | .unlocked_ioctl = snd_hwdep_ioctl, | |
329 | .compat_ioctl = snd_hwdep_ioctl_compat, | |
330 | .mmap = snd_hwdep_mmap, | |
331 | }; | |
332 | ||
7b461600 TI |
333 | static void release_hwdep_device(struct device *dev) |
334 | { | |
335 | kfree(container_of(dev, struct snd_hwdep, dev)); | |
336 | } | |
337 | ||
1da177e4 LT |
338 | /** |
339 | * snd_hwdep_new - create a new hwdep instance | |
340 | * @card: the card instance | |
341 | * @id: the id string | |
342 | * @device: the device index (zero-based) | |
343 | * @rhwdep: the pointer to store the new hwdep instance | |
344 | * | |
345 | * Creates a new hwdep instance with the given index on the card. | |
346 | * The callbacks (hwdep->ops) must be set on the returned instance | |
347 | * after this call manually by the caller. | |
348 | * | |
eb7c06e8 | 349 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 350 | */ |
d9a98de2 TI |
351 | int snd_hwdep_new(struct snd_card *card, char *id, int device, |
352 | struct snd_hwdep **rhwdep) | |
1da177e4 | 353 | { |
d9a98de2 | 354 | struct snd_hwdep *hwdep; |
1da177e4 | 355 | int err; |
d9a98de2 | 356 | static struct snd_device_ops ops = { |
1da177e4 LT |
357 | .dev_free = snd_hwdep_dev_free, |
358 | .dev_register = snd_hwdep_dev_register, | |
c461482c | 359 | .dev_disconnect = snd_hwdep_dev_disconnect, |
1da177e4 LT |
360 | }; |
361 | ||
7eaa943c TI |
362 | if (snd_BUG_ON(!card)) |
363 | return -ENXIO; | |
364 | if (rhwdep) | |
365 | *rhwdep = NULL; | |
ca2c0966 | 366 | hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL); |
ec0e9937 | 367 | if (!hwdep) |
1da177e4 | 368 | return -ENOMEM; |
7b461600 TI |
369 | |
370 | init_waitqueue_head(&hwdep->open_wait); | |
371 | mutex_init(&hwdep->open_mutex); | |
1da177e4 LT |
372 | hwdep->card = card; |
373 | hwdep->device = device; | |
73e77ba0 | 374 | if (id) |
1da177e4 | 375 | strlcpy(hwdep->id, id, sizeof(hwdep->id)); |
7b461600 TI |
376 | |
377 | snd_device_initialize(&hwdep->dev, card); | |
378 | hwdep->dev.release = release_hwdep_device; | |
379 | dev_set_name(&hwdep->dev, "hwC%iD%i", card->number, device); | |
1da177e4 LT |
380 | #ifdef CONFIG_SND_OSSEMUL |
381 | hwdep->oss_type = -1; | |
382 | #endif | |
7b461600 TI |
383 | |
384 | err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops); | |
385 | if (err < 0) { | |
386 | put_device(&hwdep->dev); | |
1da177e4 LT |
387 | return err; |
388 | } | |
7b461600 | 389 | |
7eaa943c TI |
390 | if (rhwdep) |
391 | *rhwdep = hwdep; | |
1da177e4 LT |
392 | return 0; |
393 | } | |
6776a5d7 | 394 | EXPORT_SYMBOL(snd_hwdep_new); |
1da177e4 | 395 | |
7b461600 | 396 | static int snd_hwdep_dev_free(struct snd_device *device) |
1da177e4 | 397 | { |
7b461600 | 398 | struct snd_hwdep *hwdep = device->device_data; |
7eaa943c TI |
399 | if (!hwdep) |
400 | return 0; | |
1da177e4 LT |
401 | if (hwdep->private_free) |
402 | hwdep->private_free(hwdep); | |
7b461600 | 403 | put_device(&hwdep->dev); |
1da177e4 LT |
404 | return 0; |
405 | } | |
406 | ||
d9a98de2 | 407 | static int snd_hwdep_dev_register(struct snd_device *device) |
1da177e4 | 408 | { |
d9a98de2 | 409 | struct snd_hwdep *hwdep = device->device_data; |
2ebef69f | 410 | struct snd_card *card = hwdep->card; |
f87135f5 | 411 | int err; |
1da177e4 | 412 | |
1a60d4c5 | 413 | mutex_lock(®ister_mutex); |
2ebef69f | 414 | if (snd_hwdep_search(card, hwdep->device)) { |
1a60d4c5 | 415 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
416 | return -EBUSY; |
417 | } | |
f87135f5 | 418 | list_add_tail(&hwdep->list, &snd_hwdep_devices); |
40a4b263 TI |
419 | err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP, |
420 | hwdep->card, hwdep->device, | |
421 | &snd_hwdep_f_ops, hwdep, &hwdep->dev); | |
71e2e1c1 | 422 | if (err < 0) { |
7b461600 | 423 | dev_err(&hwdep->dev, "unable to register\n"); |
f87135f5 | 424 | list_del(&hwdep->list); |
1a60d4c5 | 425 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
426 | return err; |
427 | } | |
caa751ba | 428 | |
1da177e4 LT |
429 | #ifdef CONFIG_SND_OSSEMUL |
430 | hwdep->ossreg = 0; | |
431 | if (hwdep->oss_type >= 0) { | |
7b461600 TI |
432 | if (hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM && |
433 | hwdep->device) | |
434 | dev_warn(&hwdep->dev, | |
2ebef69f | 435 | "only hwdep device 0 can be registered as OSS direct FM device!\n"); |
7b461600 TI |
436 | else if (snd_register_oss_device(hwdep->oss_type, |
437 | card, hwdep->device, | |
438 | &snd_hwdep_f_ops, hwdep) < 0) | |
439 | dev_warn(&hwdep->dev, | |
440 | "unable to register OSS compatibility device\n"); | |
441 | else | |
442 | hwdep->ossreg = 1; | |
1da177e4 LT |
443 | } |
444 | #endif | |
1a60d4c5 | 445 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
446 | return 0; |
447 | } | |
448 | ||
c461482c | 449 | static int snd_hwdep_dev_disconnect(struct snd_device *device) |
1da177e4 | 450 | { |
d9a98de2 | 451 | struct snd_hwdep *hwdep = device->device_data; |
1da177e4 | 452 | |
7eaa943c TI |
453 | if (snd_BUG_ON(!hwdep)) |
454 | return -ENXIO; | |
1a60d4c5 | 455 | mutex_lock(®ister_mutex); |
f87135f5 | 456 | if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) { |
1a60d4c5 | 457 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
458 | return -EINVAL; |
459 | } | |
0914f796 TI |
460 | mutex_lock(&hwdep->open_mutex); |
461 | wake_up(&hwdep->open_wait); | |
1da177e4 LT |
462 | #ifdef CONFIG_SND_OSSEMUL |
463 | if (hwdep->ossreg) | |
464 | snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device); | |
465 | #endif | |
40a4b263 | 466 | snd_unregister_device(&hwdep->dev); |
c461482c | 467 | list_del_init(&hwdep->list); |
0914f796 | 468 | mutex_unlock(&hwdep->open_mutex); |
1a60d4c5 | 469 | mutex_unlock(®ister_mutex); |
c461482c | 470 | return 0; |
1da177e4 LT |
471 | } |
472 | ||
cd6a6503 | 473 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
474 | /* |
475 | * Info interface | |
476 | */ | |
477 | ||
d9a98de2 TI |
478 | static void snd_hwdep_proc_read(struct snd_info_entry *entry, |
479 | struct snd_info_buffer *buffer) | |
1da177e4 | 480 | { |
d9a98de2 | 481 | struct snd_hwdep *hwdep; |
1da177e4 | 482 | |
1a60d4c5 | 483 | mutex_lock(®ister_mutex); |
9244b2c3 | 484 | list_for_each_entry(hwdep, &snd_hwdep_devices, list) |
1da177e4 | 485 | snd_iprintf(buffer, "%02i-%02i: %s\n", |
f87135f5 | 486 | hwdep->card->number, hwdep->device, hwdep->name); |
1a60d4c5 | 487 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
488 | } |
489 | ||
e28563cc | 490 | static struct snd_info_entry *snd_hwdep_proc_entry; |
1da177e4 | 491 | |
e28563cc | 492 | static void __init snd_hwdep_proc_init(void) |
1da177e4 | 493 | { |
d9a98de2 | 494 | struct snd_info_entry *entry; |
1da177e4 | 495 | |
1da177e4 | 496 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) { |
1da177e4 LT |
497 | entry->c.text.read = snd_hwdep_proc_read; |
498 | if (snd_info_register(entry) < 0) { | |
499 | snd_info_free_entry(entry); | |
500 | entry = NULL; | |
501 | } | |
502 | } | |
503 | snd_hwdep_proc_entry = entry; | |
e28563cc TI |
504 | } |
505 | ||
506 | static void __exit snd_hwdep_proc_done(void) | |
507 | { | |
746d4a02 | 508 | snd_info_free_entry(snd_hwdep_proc_entry); |
e28563cc | 509 | } |
cd6a6503 | 510 | #else /* !CONFIG_SND_PROC_FS */ |
e28563cc TI |
511 | #define snd_hwdep_proc_init() |
512 | #define snd_hwdep_proc_done() | |
cd6a6503 | 513 | #endif /* CONFIG_SND_PROC_FS */ |
e28563cc TI |
514 | |
515 | ||
516 | /* | |
517 | * ENTRY functions | |
518 | */ | |
519 | ||
520 | static int __init alsa_hwdep_init(void) | |
521 | { | |
522 | snd_hwdep_proc_init(); | |
1da177e4 LT |
523 | snd_ctl_register_ioctl(snd_hwdep_control_ioctl); |
524 | snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl); | |
525 | return 0; | |
526 | } | |
527 | ||
528 | static void __exit alsa_hwdep_exit(void) | |
529 | { | |
530 | snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl); | |
531 | snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl); | |
e28563cc | 532 | snd_hwdep_proc_done(); |
1da177e4 LT |
533 | } |
534 | ||
535 | module_init(alsa_hwdep_init) | |
536 | module_exit(alsa_hwdep_exit) |