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 | ||
a0830dbd TI |
103 | if (!try_module_get(hw->card->module)) { |
104 | snd_card_unref(hw->card); | |
1da177e4 | 105 | return -EFAULT; |
a0830dbd | 106 | } |
1da177e4 LT |
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 | } | |
345d0b19 TI |
116 | if (!hw->ops.open) { |
117 | err = 0; | |
118 | break; | |
119 | } | |
1da177e4 LT |
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); | |
1a60d4c5 | 131 | mutex_unlock(&hw->open_mutex); |
1da177e4 | 132 | schedule(); |
1a60d4c5 | 133 | mutex_lock(&hw->open_mutex); |
0914f796 TI |
134 | if (hw->card->shutdown) { |
135 | err = -ENODEV; | |
136 | break; | |
137 | } | |
1da177e4 LT |
138 | if (signal_pending(current)) { |
139 | err = -ERESTARTSYS; | |
140 | break; | |
141 | } | |
142 | } | |
143 | remove_wait_queue(&hw->open_wait, &wait); | |
144 | if (err >= 0) { | |
145 | err = snd_card_file_add(hw->card, file); | |
146 | if (err >= 0) { | |
147 | file->private_data = hw; | |
148 | hw->used++; | |
149 | } else { | |
150 | if (hw->ops.release) | |
151 | hw->ops.release(hw, file); | |
152 | } | |
153 | } | |
1a60d4c5 | 154 | mutex_unlock(&hw->open_mutex); |
1da177e4 LT |
155 | if (err < 0) |
156 | module_put(hw->card->module); | |
a0830dbd | 157 | snd_card_unref(hw->card); |
1da177e4 LT |
158 | return err; |
159 | } | |
160 | ||
161 | static int snd_hwdep_release(struct inode *inode, struct file * file) | |
162 | { | |
345d0b19 | 163 | int err = 0; |
d9a98de2 | 164 | struct snd_hwdep *hw = file->private_data; |
104326f8 | 165 | struct module *mod = hw->card->module; |
8fa58af7 | 166 | |
1a60d4c5 | 167 | mutex_lock(&hw->open_mutex); |
8fa58af7 | 168 | if (hw->ops.release) |
1da177e4 | 169 | err = hw->ops.release(hw, file); |
1da177e4 LT |
170 | if (hw->used > 0) |
171 | hw->used--; | |
1a60d4c5 | 172 | mutex_unlock(&hw->open_mutex); |
8fa58af7 KW |
173 | wake_up(&hw->open_wait); |
174 | ||
175 | snd_card_file_remove(hw->card, file); | |
104326f8 | 176 | module_put(mod); |
1da177e4 LT |
177 | return err; |
178 | } | |
179 | ||
180 | static unsigned int snd_hwdep_poll(struct file * file, poll_table * wait) | |
181 | { | |
d9a98de2 | 182 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
183 | if (hw->ops.poll) |
184 | return hw->ops.poll(hw, file, wait); | |
185 | return 0; | |
186 | } | |
187 | ||
d9a98de2 TI |
188 | static int snd_hwdep_info(struct snd_hwdep *hw, |
189 | struct snd_hwdep_info __user *_info) | |
1da177e4 | 190 | { |
d9a98de2 | 191 | struct snd_hwdep_info info; |
1da177e4 LT |
192 | |
193 | memset(&info, 0, sizeof(info)); | |
194 | info.card = hw->card->number; | |
195 | strlcpy(info.id, hw->id, sizeof(info.id)); | |
196 | strlcpy(info.name, hw->name, sizeof(info.name)); | |
197 | info.iface = hw->iface; | |
198 | if (copy_to_user(_info, &info, sizeof(info))) | |
199 | return -EFAULT; | |
200 | return 0; | |
201 | } | |
202 | ||
d9a98de2 TI |
203 | static int snd_hwdep_dsp_status(struct snd_hwdep *hw, |
204 | struct snd_hwdep_dsp_status __user *_info) | |
1da177e4 | 205 | { |
d9a98de2 | 206 | struct snd_hwdep_dsp_status info; |
1da177e4 LT |
207 | int err; |
208 | ||
209 | if (! hw->ops.dsp_status) | |
210 | return -ENXIO; | |
211 | memset(&info, 0, sizeof(info)); | |
212 | info.dsp_loaded = hw->dsp_loaded; | |
213 | if ((err = hw->ops.dsp_status(hw, &info)) < 0) | |
214 | return err; | |
215 | if (copy_to_user(_info, &info, sizeof(info))) | |
216 | return -EFAULT; | |
217 | return 0; | |
218 | } | |
219 | ||
d9a98de2 TI |
220 | static int snd_hwdep_dsp_load(struct snd_hwdep *hw, |
221 | struct snd_hwdep_dsp_image __user *_info) | |
1da177e4 | 222 | { |
d9a98de2 | 223 | struct snd_hwdep_dsp_image info; |
1da177e4 LT |
224 | int err; |
225 | ||
226 | if (! hw->ops.dsp_load) | |
227 | return -ENXIO; | |
228 | memset(&info, 0, sizeof(info)); | |
229 | if (copy_from_user(&info, _info, sizeof(info))) | |
230 | return -EFAULT; | |
231 | /* check whether the dsp was already loaded */ | |
232 | if (hw->dsp_loaded & (1 << info.index)) | |
233 | return -EBUSY; | |
234 | if (!access_ok(VERIFY_READ, info.image, info.length)) | |
235 | return -EFAULT; | |
236 | err = hw->ops.dsp_load(hw, &info); | |
237 | if (err < 0) | |
238 | return err; | |
239 | hw->dsp_loaded |= (1 << info.index); | |
240 | return 0; | |
241 | } | |
242 | ||
d9a98de2 TI |
243 | static long snd_hwdep_ioctl(struct file * file, unsigned int cmd, |
244 | unsigned long arg) | |
1da177e4 | 245 | { |
d9a98de2 | 246 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
247 | void __user *argp = (void __user *)arg; |
248 | switch (cmd) { | |
249 | case SNDRV_HWDEP_IOCTL_PVERSION: | |
250 | return put_user(SNDRV_HWDEP_VERSION, (int __user *)argp); | |
251 | case SNDRV_HWDEP_IOCTL_INFO: | |
252 | return snd_hwdep_info(hw, argp); | |
253 | case SNDRV_HWDEP_IOCTL_DSP_STATUS: | |
254 | return snd_hwdep_dsp_status(hw, argp); | |
255 | case SNDRV_HWDEP_IOCTL_DSP_LOAD: | |
256 | return snd_hwdep_dsp_load(hw, argp); | |
257 | } | |
258 | if (hw->ops.ioctl) | |
259 | return hw->ops.ioctl(hw, file, cmd, arg); | |
260 | return -ENOTTY; | |
261 | } | |
262 | ||
263 | static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma) | |
264 | { | |
d9a98de2 | 265 | struct snd_hwdep *hw = file->private_data; |
1da177e4 LT |
266 | if (hw->ops.mmap) |
267 | return hw->ops.mmap(hw, file, vma); | |
268 | return -ENXIO; | |
269 | } | |
270 | ||
d9a98de2 TI |
271 | static int snd_hwdep_control_ioctl(struct snd_card *card, |
272 | struct snd_ctl_file * control, | |
1da177e4 LT |
273 | unsigned int cmd, unsigned long arg) |
274 | { | |
1da177e4 LT |
275 | switch (cmd) { |
276 | case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE: | |
277 | { | |
278 | int device; | |
279 | ||
280 | if (get_user(device, (int __user *)arg)) | |
281 | return -EFAULT; | |
1a60d4c5 | 282 | mutex_lock(®ister_mutex); |
f7b2bb85 DC |
283 | |
284 | if (device < 0) | |
285 | device = 0; | |
286 | else if (device < SNDRV_MINOR_HWDEPS) | |
287 | device++; | |
288 | else | |
289 | device = SNDRV_MINOR_HWDEPS; | |
290 | ||
1da177e4 | 291 | while (device < SNDRV_MINOR_HWDEPS) { |
f87135f5 | 292 | if (snd_hwdep_search(card, device)) |
1da177e4 LT |
293 | break; |
294 | device++; | |
295 | } | |
296 | if (device >= SNDRV_MINOR_HWDEPS) | |
297 | device = -1; | |
1a60d4c5 | 298 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
299 | if (put_user(device, (int __user *)arg)) |
300 | return -EFAULT; | |
301 | return 0; | |
302 | } | |
303 | case SNDRV_CTL_IOCTL_HWDEP_INFO: | |
304 | { | |
d9a98de2 | 305 | struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg; |
f87135f5 | 306 | int device, err; |
d9a98de2 | 307 | struct snd_hwdep *hwdep; |
1da177e4 LT |
308 | |
309 | if (get_user(device, &info->device)) | |
310 | return -EFAULT; | |
1a60d4c5 | 311 | mutex_lock(®ister_mutex); |
f87135f5 CL |
312 | hwdep = snd_hwdep_search(card, device); |
313 | if (hwdep) | |
314 | err = snd_hwdep_info(hwdep, info); | |
315 | else | |
316 | err = -ENXIO; | |
1a60d4c5 | 317 | mutex_unlock(®ister_mutex); |
f87135f5 | 318 | return err; |
1da177e4 LT |
319 | } |
320 | } | |
321 | return -ENOIOCTLCMD; | |
322 | } | |
323 | ||
324 | #ifdef CONFIG_COMPAT | |
325 | #include "hwdep_compat.c" | |
326 | #else | |
327 | #define snd_hwdep_ioctl_compat NULL | |
328 | #endif | |
329 | ||
330 | /* | |
331 | ||
332 | */ | |
333 | ||
9c2e08c5 | 334 | static const struct file_operations snd_hwdep_f_ops = |
1da177e4 LT |
335 | { |
336 | .owner = THIS_MODULE, | |
337 | .llseek = snd_hwdep_llseek, | |
338 | .read = snd_hwdep_read, | |
339 | .write = snd_hwdep_write, | |
340 | .open = snd_hwdep_open, | |
341 | .release = snd_hwdep_release, | |
342 | .poll = snd_hwdep_poll, | |
343 | .unlocked_ioctl = snd_hwdep_ioctl, | |
344 | .compat_ioctl = snd_hwdep_ioctl_compat, | |
345 | .mmap = snd_hwdep_mmap, | |
346 | }; | |
347 | ||
1da177e4 LT |
348 | /** |
349 | * snd_hwdep_new - create a new hwdep instance | |
350 | * @card: the card instance | |
351 | * @id: the id string | |
352 | * @device: the device index (zero-based) | |
353 | * @rhwdep: the pointer to store the new hwdep instance | |
354 | * | |
355 | * Creates a new hwdep instance with the given index on the card. | |
356 | * The callbacks (hwdep->ops) must be set on the returned instance | |
357 | * after this call manually by the caller. | |
358 | * | |
eb7c06e8 | 359 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 360 | */ |
d9a98de2 TI |
361 | int snd_hwdep_new(struct snd_card *card, char *id, int device, |
362 | struct snd_hwdep **rhwdep) | |
1da177e4 | 363 | { |
d9a98de2 | 364 | struct snd_hwdep *hwdep; |
1da177e4 | 365 | int err; |
d9a98de2 | 366 | static struct snd_device_ops ops = { |
1da177e4 LT |
367 | .dev_free = snd_hwdep_dev_free, |
368 | .dev_register = snd_hwdep_dev_register, | |
c461482c | 369 | .dev_disconnect = snd_hwdep_dev_disconnect, |
1da177e4 LT |
370 | }; |
371 | ||
7eaa943c TI |
372 | if (snd_BUG_ON(!card)) |
373 | return -ENXIO; | |
374 | if (rhwdep) | |
375 | *rhwdep = NULL; | |
ca2c0966 | 376 | hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL); |
73e77ba0 | 377 | if (hwdep == NULL) { |
2ebef69f | 378 | dev_err(card->dev, "hwdep: cannot allocate\n"); |
1da177e4 | 379 | return -ENOMEM; |
73e77ba0 | 380 | } |
1da177e4 LT |
381 | hwdep->card = card; |
382 | hwdep->device = device; | |
73e77ba0 | 383 | if (id) |
1da177e4 | 384 | strlcpy(hwdep->id, id, sizeof(hwdep->id)); |
1da177e4 LT |
385 | #ifdef CONFIG_SND_OSSEMUL |
386 | hwdep->oss_type = -1; | |
387 | #endif | |
388 | if ((err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops)) < 0) { | |
389 | snd_hwdep_free(hwdep); | |
390 | return err; | |
391 | } | |
392 | init_waitqueue_head(&hwdep->open_wait); | |
1a60d4c5 | 393 | mutex_init(&hwdep->open_mutex); |
7eaa943c TI |
394 | if (rhwdep) |
395 | *rhwdep = hwdep; | |
1da177e4 LT |
396 | return 0; |
397 | } | |
398 | ||
d9a98de2 | 399 | static int snd_hwdep_free(struct snd_hwdep *hwdep) |
1da177e4 | 400 | { |
7eaa943c TI |
401 | if (!hwdep) |
402 | return 0; | |
1da177e4 LT |
403 | if (hwdep->private_free) |
404 | hwdep->private_free(hwdep); | |
405 | kfree(hwdep); | |
406 | return 0; | |
407 | } | |
408 | ||
d9a98de2 | 409 | static int snd_hwdep_dev_free(struct snd_device *device) |
1da177e4 | 410 | { |
d9a98de2 | 411 | struct snd_hwdep *hwdep = device->device_data; |
1da177e4 LT |
412 | return snd_hwdep_free(hwdep); |
413 | } | |
414 | ||
d9a98de2 | 415 | static int snd_hwdep_dev_register(struct snd_device *device) |
1da177e4 | 416 | { |
d9a98de2 | 417 | struct snd_hwdep *hwdep = device->device_data; |
2ebef69f | 418 | struct snd_card *card = hwdep->card; |
f87135f5 | 419 | int err; |
1da177e4 LT |
420 | char name[32]; |
421 | ||
1a60d4c5 | 422 | mutex_lock(®ister_mutex); |
2ebef69f | 423 | if (snd_hwdep_search(card, hwdep->device)) { |
1a60d4c5 | 424 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
425 | return -EBUSY; |
426 | } | |
f87135f5 | 427 | list_add_tail(&hwdep->list, &snd_hwdep_devices); |
1da177e4 LT |
428 | sprintf(name, "hwC%iD%i", hwdep->card->number, hwdep->device); |
429 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP, | |
430 | hwdep->card, hwdep->device, | |
f87135f5 | 431 | &snd_hwdep_f_ops, hwdep, name)) < 0) { |
2ebef69f TI |
432 | dev_err(card->dev, |
433 | "unable to register hardware dependent device %i:%i\n", | |
434 | card->number, hwdep->device); | |
f87135f5 | 435 | list_del(&hwdep->list); |
1a60d4c5 | 436 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
437 | return err; |
438 | } | |
caa751ba TI |
439 | |
440 | if (hwdep->groups) { | |
441 | struct device *d = snd_get_device(SNDRV_DEVICE_TYPE_HWDEP, | |
442 | hwdep->card, hwdep->device); | |
443 | if (d) { | |
f806bdb2 TI |
444 | if (hwdep->private_data) |
445 | dev_set_drvdata(d, hwdep->private_data); | |
caa751ba TI |
446 | err = sysfs_create_groups(&d->kobj, hwdep->groups); |
447 | if (err < 0) | |
448 | dev_warn(card->dev, | |
449 | "hwdep %d:%d: cannot create sysfs groups\n", | |
450 | card->number, hwdep->device); | |
451 | put_device(d); | |
452 | } | |
453 | } | |
454 | ||
1da177e4 LT |
455 | #ifdef CONFIG_SND_OSSEMUL |
456 | hwdep->ossreg = 0; | |
457 | if (hwdep->oss_type >= 0) { | |
458 | if ((hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM) && (hwdep->device != 0)) { | |
2ebef69f TI |
459 | dev_warn(card->dev, |
460 | "only hwdep device 0 can be registered as OSS direct FM device!\n"); | |
1da177e4 LT |
461 | } else { |
462 | if (snd_register_oss_device(hwdep->oss_type, | |
2ebef69f | 463 | card, hwdep->device, |
80d7d771 | 464 | &snd_hwdep_f_ops, hwdep) < 0) { |
2ebef69f TI |
465 | dev_err(card->dev, |
466 | "unable to register OSS compatibility device %i:%i\n", | |
467 | card->number, hwdep->device); | |
1da177e4 LT |
468 | } else |
469 | hwdep->ossreg = 1; | |
470 | } | |
471 | } | |
472 | #endif | |
1a60d4c5 | 473 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
474 | return 0; |
475 | } | |
476 | ||
c461482c | 477 | static int snd_hwdep_dev_disconnect(struct snd_device *device) |
1da177e4 | 478 | { |
d9a98de2 | 479 | struct snd_hwdep *hwdep = device->device_data; |
1da177e4 | 480 | |
7eaa943c TI |
481 | if (snd_BUG_ON(!hwdep)) |
482 | return -ENXIO; | |
1a60d4c5 | 483 | mutex_lock(®ister_mutex); |
f87135f5 | 484 | if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) { |
1a60d4c5 | 485 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
486 | return -EINVAL; |
487 | } | |
0914f796 TI |
488 | mutex_lock(&hwdep->open_mutex); |
489 | wake_up(&hwdep->open_wait); | |
1da177e4 LT |
490 | #ifdef CONFIG_SND_OSSEMUL |
491 | if (hwdep->ossreg) | |
492 | snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device); | |
493 | #endif | |
494 | snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device); | |
c461482c | 495 | list_del_init(&hwdep->list); |
0914f796 | 496 | mutex_unlock(&hwdep->open_mutex); |
1a60d4c5 | 497 | mutex_unlock(®ister_mutex); |
c461482c | 498 | return 0; |
1da177e4 LT |
499 | } |
500 | ||
e28563cc | 501 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
502 | /* |
503 | * Info interface | |
504 | */ | |
505 | ||
d9a98de2 TI |
506 | static void snd_hwdep_proc_read(struct snd_info_entry *entry, |
507 | struct snd_info_buffer *buffer) | |
1da177e4 | 508 | { |
d9a98de2 | 509 | struct snd_hwdep *hwdep; |
1da177e4 | 510 | |
1a60d4c5 | 511 | mutex_lock(®ister_mutex); |
9244b2c3 | 512 | list_for_each_entry(hwdep, &snd_hwdep_devices, list) |
1da177e4 | 513 | snd_iprintf(buffer, "%02i-%02i: %s\n", |
f87135f5 | 514 | hwdep->card->number, hwdep->device, hwdep->name); |
1a60d4c5 | 515 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
516 | } |
517 | ||
e28563cc | 518 | static struct snd_info_entry *snd_hwdep_proc_entry; |
1da177e4 | 519 | |
e28563cc | 520 | static void __init snd_hwdep_proc_init(void) |
1da177e4 | 521 | { |
d9a98de2 | 522 | struct snd_info_entry *entry; |
1da177e4 | 523 | |
1da177e4 | 524 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) { |
1da177e4 LT |
525 | entry->c.text.read = snd_hwdep_proc_read; |
526 | if (snd_info_register(entry) < 0) { | |
527 | snd_info_free_entry(entry); | |
528 | entry = NULL; | |
529 | } | |
530 | } | |
531 | snd_hwdep_proc_entry = entry; | |
e28563cc TI |
532 | } |
533 | ||
534 | static void __exit snd_hwdep_proc_done(void) | |
535 | { | |
746d4a02 | 536 | snd_info_free_entry(snd_hwdep_proc_entry); |
e28563cc TI |
537 | } |
538 | #else /* !CONFIG_PROC_FS */ | |
539 | #define snd_hwdep_proc_init() | |
540 | #define snd_hwdep_proc_done() | |
541 | #endif /* CONFIG_PROC_FS */ | |
542 | ||
543 | ||
544 | /* | |
545 | * ENTRY functions | |
546 | */ | |
547 | ||
548 | static int __init alsa_hwdep_init(void) | |
549 | { | |
550 | snd_hwdep_proc_init(); | |
1da177e4 LT |
551 | snd_ctl_register_ioctl(snd_hwdep_control_ioctl); |
552 | snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl); | |
553 | return 0; | |
554 | } | |
555 | ||
556 | static void __exit alsa_hwdep_exit(void) | |
557 | { | |
558 | snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl); | |
559 | snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl); | |
e28563cc | 560 | snd_hwdep_proc_done(); |
1da177e4 LT |
561 | } |
562 | ||
563 | module_init(alsa_hwdep_init) | |
564 | module_exit(alsa_hwdep_exit) | |
565 | ||
566 | EXPORT_SYMBOL(snd_hwdep_new); |