Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Routines for driver control interface | |
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/threads.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/smp_lock.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/vmalloc.h> | |
28 | #include <linux/time.h> | |
29 | #include <sound/core.h> | |
30 | #include <sound/minors.h> | |
31 | #include <sound/info.h> | |
32 | #include <sound/control.h> | |
33 | ||
34 | /* max number of user-defined controls */ | |
35 | #define MAX_USER_CONTROLS 32 | |
36 | ||
82e9bae6 | 37 | struct snd_kctl_ioctl { |
1da177e4 LT |
38 | struct list_head list; /* list of all ioctls */ |
39 | snd_kctl_ioctl_func_t fioctl; | |
82e9bae6 | 40 | }; |
1da177e4 LT |
41 | |
42 | static DECLARE_RWSEM(snd_ioctl_rwsem); | |
43 | static LIST_HEAD(snd_control_ioctls); | |
44 | #ifdef CONFIG_COMPAT | |
45 | static LIST_HEAD(snd_control_compat_ioctls); | |
46 | #endif | |
47 | ||
48 | static int snd_ctl_open(struct inode *inode, struct file *file) | |
49 | { | |
1da177e4 | 50 | unsigned long flags; |
82e9bae6 TI |
51 | struct snd_card *card; |
52 | struct snd_ctl_file *ctl; | |
1da177e4 LT |
53 | int err; |
54 | ||
f87135f5 | 55 | card = snd_lookup_minor_data(iminor(inode), SNDRV_DEVICE_TYPE_CONTROL); |
1da177e4 LT |
56 | if (!card) { |
57 | err = -ENODEV; | |
58 | goto __error1; | |
59 | } | |
60 | err = snd_card_file_add(card, file); | |
61 | if (err < 0) { | |
62 | err = -ENODEV; | |
63 | goto __error1; | |
64 | } | |
65 | if (!try_module_get(card->module)) { | |
66 | err = -EFAULT; | |
67 | goto __error2; | |
68 | } | |
ca2c0966 | 69 | ctl = kzalloc(sizeof(*ctl), GFP_KERNEL); |
1da177e4 LT |
70 | if (ctl == NULL) { |
71 | err = -ENOMEM; | |
72 | goto __error; | |
73 | } | |
74 | INIT_LIST_HEAD(&ctl->events); | |
75 | init_waitqueue_head(&ctl->change_sleep); | |
76 | spin_lock_init(&ctl->read_lock); | |
77 | ctl->card = card; | |
2529bba7 TI |
78 | ctl->prefer_pcm_subdevice = -1; |
79 | ctl->prefer_rawmidi_subdevice = -1; | |
1da177e4 LT |
80 | ctl->pid = current->pid; |
81 | file->private_data = ctl; | |
82 | write_lock_irqsave(&card->ctl_files_rwlock, flags); | |
83 | list_add_tail(&ctl->list, &card->ctl_files); | |
84 | write_unlock_irqrestore(&card->ctl_files_rwlock, flags); | |
85 | return 0; | |
86 | ||
87 | __error: | |
88 | module_put(card->module); | |
89 | __error2: | |
90 | snd_card_file_remove(card, file); | |
91 | __error1: | |
92 | return err; | |
93 | } | |
94 | ||
82e9bae6 | 95 | static void snd_ctl_empty_read_queue(struct snd_ctl_file * ctl) |
1da177e4 | 96 | { |
82e9bae6 | 97 | struct snd_kctl_event *cread; |
1da177e4 LT |
98 | |
99 | spin_lock(&ctl->read_lock); | |
100 | while (!list_empty(&ctl->events)) { | |
101 | cread = snd_kctl_event(ctl->events.next); | |
102 | list_del(&cread->list); | |
103 | kfree(cread); | |
104 | } | |
105 | spin_unlock(&ctl->read_lock); | |
106 | } | |
107 | ||
108 | static int snd_ctl_release(struct inode *inode, struct file *file) | |
109 | { | |
110 | unsigned long flags; | |
111 | struct list_head *list; | |
82e9bae6 TI |
112 | struct snd_card *card; |
113 | struct snd_ctl_file *ctl; | |
114 | struct snd_kcontrol *control; | |
1da177e4 LT |
115 | unsigned int idx; |
116 | ||
117 | ctl = file->private_data; | |
118 | fasync_helper(-1, file, 0, &ctl->fasync); | |
119 | file->private_data = NULL; | |
120 | card = ctl->card; | |
121 | write_lock_irqsave(&card->ctl_files_rwlock, flags); | |
122 | list_del(&ctl->list); | |
123 | write_unlock_irqrestore(&card->ctl_files_rwlock, flags); | |
124 | down_write(&card->controls_rwsem); | |
125 | list_for_each(list, &card->controls) { | |
126 | control = snd_kcontrol(list); | |
127 | for (idx = 0; idx < control->count; idx++) | |
128 | if (control->vd[idx].owner == ctl) | |
129 | control->vd[idx].owner = NULL; | |
130 | } | |
131 | up_write(&card->controls_rwsem); | |
132 | snd_ctl_empty_read_queue(ctl); | |
133 | kfree(ctl); | |
134 | module_put(card->module); | |
135 | snd_card_file_remove(card, file); | |
136 | return 0; | |
137 | } | |
138 | ||
82e9bae6 TI |
139 | void snd_ctl_notify(struct snd_card *card, unsigned int mask, |
140 | struct snd_ctl_elem_id *id) | |
1da177e4 LT |
141 | { |
142 | unsigned long flags; | |
143 | struct list_head *flist; | |
82e9bae6 TI |
144 | struct snd_ctl_file *ctl; |
145 | struct snd_kctl_event *ev; | |
1da177e4 | 146 | |
7c22f1aa | 147 | snd_assert(card != NULL && id != NULL, return); |
1da177e4 LT |
148 | read_lock(&card->ctl_files_rwlock); |
149 | #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) | |
150 | card->mixer_oss_change_count++; | |
151 | #endif | |
152 | list_for_each(flist, &card->ctl_files) { | |
153 | struct list_head *elist; | |
154 | ctl = snd_ctl_file(flist); | |
155 | if (!ctl->subscribed) | |
156 | continue; | |
157 | spin_lock_irqsave(&ctl->read_lock, flags); | |
158 | list_for_each(elist, &ctl->events) { | |
159 | ev = snd_kctl_event(elist); | |
160 | if (ev->id.numid == id->numid) { | |
161 | ev->mask |= mask; | |
162 | goto _found; | |
163 | } | |
164 | } | |
ca2c0966 | 165 | ev = kzalloc(sizeof(*ev), GFP_ATOMIC); |
1da177e4 LT |
166 | if (ev) { |
167 | ev->id = *id; | |
168 | ev->mask = mask; | |
169 | list_add_tail(&ev->list, &ctl->events); | |
170 | } else { | |
171 | snd_printk(KERN_ERR "No memory available to allocate event\n"); | |
172 | } | |
173 | _found: | |
174 | wake_up(&ctl->change_sleep); | |
175 | spin_unlock_irqrestore(&ctl->read_lock, flags); | |
176 | kill_fasync(&ctl->fasync, SIGIO, POLL_IN); | |
177 | } | |
178 | read_unlock(&card->ctl_files_rwlock); | |
179 | } | |
180 | ||
c0d3fb39 TI |
181 | EXPORT_SYMBOL(snd_ctl_notify); |
182 | ||
1da177e4 LT |
183 | /** |
184 | * snd_ctl_new - create a control instance from the template | |
185 | * @control: the control template | |
186 | * @access: the default control access | |
187 | * | |
82e9bae6 | 188 | * Allocates a new struct snd_kcontrol instance and copies the given template |
1da177e4 LT |
189 | * to the new instance. It does not copy volatile data (access). |
190 | * | |
191 | * Returns the pointer of the new instance, or NULL on failure. | |
192 | */ | |
82e9bae6 | 193 | struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol *control, unsigned int access) |
1da177e4 | 194 | { |
82e9bae6 | 195 | struct snd_kcontrol *kctl; |
1da177e4 LT |
196 | unsigned int idx; |
197 | ||
7c22f1aa TI |
198 | snd_assert(control != NULL, return NULL); |
199 | snd_assert(control->count > 0, return NULL); | |
82e9bae6 | 200 | kctl = kzalloc(sizeof(*kctl) + sizeof(struct snd_kcontrol_volatile) * control->count, GFP_KERNEL); |
73e77ba0 TI |
201 | if (kctl == NULL) { |
202 | snd_printk(KERN_ERR "Cannot allocate control instance\n"); | |
1da177e4 | 203 | return NULL; |
73e77ba0 | 204 | } |
1da177e4 LT |
205 | *kctl = *control; |
206 | for (idx = 0; idx < kctl->count; idx++) | |
207 | kctl->vd[idx].access = access; | |
208 | return kctl; | |
209 | } | |
210 | ||
c0d3fb39 TI |
211 | EXPORT_SYMBOL(snd_ctl_new); |
212 | ||
1da177e4 LT |
213 | /** |
214 | * snd_ctl_new1 - create a control instance from the template | |
215 | * @ncontrol: the initialization record | |
216 | * @private_data: the private data to set | |
217 | * | |
82e9bae6 | 218 | * Allocates a new struct snd_kcontrol instance and initialize from the given |
1da177e4 LT |
219 | * template. When the access field of ncontrol is 0, it's assumed as |
220 | * READWRITE access. When the count field is 0, it's assumes as one. | |
221 | * | |
222 | * Returns the pointer of the newly generated instance, or NULL on failure. | |
223 | */ | |
82e9bae6 TI |
224 | struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new *ncontrol, |
225 | void *private_data) | |
1da177e4 | 226 | { |
82e9bae6 | 227 | struct snd_kcontrol kctl; |
1da177e4 LT |
228 | unsigned int access; |
229 | ||
7c22f1aa | 230 | snd_assert(ncontrol != NULL, return NULL); |
1da177e4 LT |
231 | snd_assert(ncontrol->info != NULL, return NULL); |
232 | memset(&kctl, 0, sizeof(kctl)); | |
233 | kctl.id.iface = ncontrol->iface; | |
234 | kctl.id.device = ncontrol->device; | |
235 | kctl.id.subdevice = ncontrol->subdevice; | |
236 | if (ncontrol->name) | |
237 | strlcpy(kctl.id.name, ncontrol->name, sizeof(kctl.id.name)); | |
238 | kctl.id.index = ncontrol->index; | |
239 | kctl.count = ncontrol->count ? ncontrol->count : 1; | |
240 | access = ncontrol->access == 0 ? SNDRV_CTL_ELEM_ACCESS_READWRITE : | |
8aa9b586 JK |
241 | (ncontrol->access & (SNDRV_CTL_ELEM_ACCESS_READWRITE| |
242 | SNDRV_CTL_ELEM_ACCESS_INACTIVE| | |
243 | SNDRV_CTL_ELEM_ACCESS_DINDIRECT| | |
244 | SNDRV_CTL_ELEM_ACCESS_INDIRECT| | |
245 | SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE| | |
246 | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK)); | |
1da177e4 LT |
247 | kctl.info = ncontrol->info; |
248 | kctl.get = ncontrol->get; | |
249 | kctl.put = ncontrol->put; | |
8aa9b586 | 250 | kctl.tlv.p = ncontrol->tlv.p; |
1da177e4 LT |
251 | kctl.private_value = ncontrol->private_value; |
252 | kctl.private_data = private_data; | |
253 | return snd_ctl_new(&kctl, access); | |
254 | } | |
255 | ||
c0d3fb39 TI |
256 | EXPORT_SYMBOL(snd_ctl_new1); |
257 | ||
1da177e4 LT |
258 | /** |
259 | * snd_ctl_free_one - release the control instance | |
260 | * @kcontrol: the control instance | |
261 | * | |
262 | * Releases the control instance created via snd_ctl_new() | |
263 | * or snd_ctl_new1(). | |
264 | * Don't call this after the control was added to the card. | |
265 | */ | |
82e9bae6 | 266 | void snd_ctl_free_one(struct snd_kcontrol *kcontrol) |
1da177e4 LT |
267 | { |
268 | if (kcontrol) { | |
269 | if (kcontrol->private_free) | |
270 | kcontrol->private_free(kcontrol); | |
271 | kfree(kcontrol); | |
272 | } | |
273 | } | |
274 | ||
c0d3fb39 TI |
275 | EXPORT_SYMBOL(snd_ctl_free_one); |
276 | ||
82e9bae6 | 277 | static unsigned int snd_ctl_hole_check(struct snd_card *card, |
1da177e4 LT |
278 | unsigned int count) |
279 | { | |
280 | struct list_head *list; | |
82e9bae6 | 281 | struct snd_kcontrol *kctl; |
1da177e4 LT |
282 | |
283 | list_for_each(list, &card->controls) { | |
284 | kctl = snd_kcontrol(list); | |
285 | if ((kctl->id.numid <= card->last_numid && | |
286 | kctl->id.numid + kctl->count > card->last_numid) || | |
287 | (kctl->id.numid <= card->last_numid + count - 1 && | |
288 | kctl->id.numid + kctl->count > card->last_numid + count - 1)) | |
289 | return card->last_numid = kctl->id.numid + kctl->count - 1; | |
290 | } | |
291 | return card->last_numid; | |
292 | } | |
293 | ||
82e9bae6 | 294 | static int snd_ctl_find_hole(struct snd_card *card, unsigned int count) |
1da177e4 LT |
295 | { |
296 | unsigned int last_numid, iter = 100000; | |
297 | ||
298 | last_numid = card->last_numid; | |
299 | while (last_numid != snd_ctl_hole_check(card, count)) { | |
300 | if (--iter == 0) { | |
301 | /* this situation is very unlikely */ | |
302 | snd_printk(KERN_ERR "unable to allocate new control numid\n"); | |
303 | return -ENOMEM; | |
304 | } | |
305 | last_numid = card->last_numid; | |
306 | } | |
307 | return 0; | |
308 | } | |
309 | ||
310 | /** | |
311 | * snd_ctl_add - add the control instance to the card | |
312 | * @card: the card instance | |
313 | * @kcontrol: the control instance to add | |
314 | * | |
315 | * Adds the control instance created via snd_ctl_new() or | |
316 | * snd_ctl_new1() to the given card. Assigns also an unique | |
317 | * numid used for fast search. | |
318 | * | |
319 | * Returns zero if successful, or a negative error code on failure. | |
320 | * | |
321 | * It frees automatically the control which cannot be added. | |
322 | */ | |
82e9bae6 | 323 | int snd_ctl_add(struct snd_card *card, struct snd_kcontrol *kcontrol) |
1da177e4 | 324 | { |
82e9bae6 | 325 | struct snd_ctl_elem_id id; |
1da177e4 | 326 | unsigned int idx; |
c6077b30 | 327 | int err = -EINVAL; |
1da177e4 | 328 | |
73e77ba0 | 329 | if (! kcontrol) |
c6077b30 TI |
330 | return err; |
331 | snd_assert(card != NULL, goto error); | |
332 | snd_assert(kcontrol->info != NULL, goto error); | |
1da177e4 LT |
333 | id = kcontrol->id; |
334 | down_write(&card->controls_rwsem); | |
335 | if (snd_ctl_find_id(card, &id)) { | |
336 | up_write(&card->controls_rwsem); | |
1da177e4 LT |
337 | snd_printd(KERN_ERR "control %i:%i:%i:%s:%i is already present\n", |
338 | id.iface, | |
339 | id.device, | |
340 | id.subdevice, | |
341 | id.name, | |
342 | id.index); | |
c6077b30 TI |
343 | err = -EBUSY; |
344 | goto error; | |
1da177e4 LT |
345 | } |
346 | if (snd_ctl_find_hole(card, kcontrol->count) < 0) { | |
347 | up_write(&card->controls_rwsem); | |
c6077b30 TI |
348 | err = -ENOMEM; |
349 | goto error; | |
1da177e4 LT |
350 | } |
351 | list_add_tail(&kcontrol->list, &card->controls); | |
352 | card->controls_count += kcontrol->count; | |
353 | kcontrol->id.numid = card->last_numid + 1; | |
354 | card->last_numid += kcontrol->count; | |
355 | up_write(&card->controls_rwsem); | |
356 | for (idx = 0; idx < kcontrol->count; idx++, id.index++, id.numid++) | |
357 | snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_ADD, &id); | |
358 | return 0; | |
c6077b30 TI |
359 | |
360 | error: | |
361 | snd_ctl_free_one(kcontrol); | |
362 | return err; | |
1da177e4 LT |
363 | } |
364 | ||
c0d3fb39 TI |
365 | EXPORT_SYMBOL(snd_ctl_add); |
366 | ||
1da177e4 LT |
367 | /** |
368 | * snd_ctl_remove - remove the control from the card and release it | |
369 | * @card: the card instance | |
370 | * @kcontrol: the control instance to remove | |
371 | * | |
372 | * Removes the control from the card and then releases the instance. | |
373 | * You don't need to call snd_ctl_free_one(). You must be in | |
374 | * the write lock - down_write(&card->controls_rwsem). | |
375 | * | |
376 | * Returns 0 if successful, or a negative error code on failure. | |
377 | */ | |
82e9bae6 | 378 | int snd_ctl_remove(struct snd_card *card, struct snd_kcontrol *kcontrol) |
1da177e4 | 379 | { |
82e9bae6 | 380 | struct snd_ctl_elem_id id; |
1da177e4 LT |
381 | unsigned int idx; |
382 | ||
7c22f1aa | 383 | snd_assert(card != NULL && kcontrol != NULL, return -EINVAL); |
1da177e4 LT |
384 | list_del(&kcontrol->list); |
385 | card->controls_count -= kcontrol->count; | |
386 | id = kcontrol->id; | |
387 | for (idx = 0; idx < kcontrol->count; idx++, id.index++, id.numid++) | |
388 | snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_REMOVE, &id); | |
389 | snd_ctl_free_one(kcontrol); | |
390 | return 0; | |
391 | } | |
392 | ||
c0d3fb39 TI |
393 | EXPORT_SYMBOL(snd_ctl_remove); |
394 | ||
1da177e4 LT |
395 | /** |
396 | * snd_ctl_remove_id - remove the control of the given id and release it | |
397 | * @card: the card instance | |
398 | * @id: the control id to remove | |
399 | * | |
400 | * Finds the control instance with the given id, removes it from the | |
401 | * card list and releases it. | |
402 | * | |
403 | * Returns 0 if successful, or a negative error code on failure. | |
404 | */ | |
82e9bae6 | 405 | int snd_ctl_remove_id(struct snd_card *card, struct snd_ctl_elem_id *id) |
1da177e4 | 406 | { |
82e9bae6 | 407 | struct snd_kcontrol *kctl; |
1da177e4 LT |
408 | int ret; |
409 | ||
410 | down_write(&card->controls_rwsem); | |
411 | kctl = snd_ctl_find_id(card, id); | |
412 | if (kctl == NULL) { | |
413 | up_write(&card->controls_rwsem); | |
414 | return -ENOENT; | |
415 | } | |
416 | ret = snd_ctl_remove(card, kctl); | |
417 | up_write(&card->controls_rwsem); | |
418 | return ret; | |
419 | } | |
420 | ||
c0d3fb39 TI |
421 | EXPORT_SYMBOL(snd_ctl_remove_id); |
422 | ||
1da177e4 LT |
423 | /** |
424 | * snd_ctl_remove_unlocked_id - remove the unlocked control of the given id and release it | |
425 | * @file: active control handle | |
426 | * @id: the control id to remove | |
427 | * | |
428 | * Finds the control instance with the given id, removes it from the | |
429 | * card list and releases it. | |
430 | * | |
431 | * Returns 0 if successful, or a negative error code on failure. | |
432 | */ | |
82e9bae6 TI |
433 | static int snd_ctl_remove_unlocked_id(struct snd_ctl_file * file, |
434 | struct snd_ctl_elem_id *id) | |
1da177e4 | 435 | { |
82e9bae6 TI |
436 | struct snd_card *card = file->card; |
437 | struct snd_kcontrol *kctl; | |
1da177e4 LT |
438 | int idx, ret; |
439 | ||
440 | down_write(&card->controls_rwsem); | |
441 | kctl = snd_ctl_find_id(card, id); | |
442 | if (kctl == NULL) { | |
443 | up_write(&card->controls_rwsem); | |
444 | return -ENOENT; | |
445 | } | |
446 | for (idx = 0; idx < kctl->count; idx++) | |
447 | if (kctl->vd[idx].owner != NULL && kctl->vd[idx].owner != file) { | |
448 | up_write(&card->controls_rwsem); | |
449 | return -EBUSY; | |
450 | } | |
451 | ret = snd_ctl_remove(card, kctl); | |
452 | up_write(&card->controls_rwsem); | |
453 | return ret; | |
454 | } | |
455 | ||
456 | /** | |
457 | * snd_ctl_rename_id - replace the id of a control on the card | |
458 | * @card: the card instance | |
459 | * @src_id: the old id | |
460 | * @dst_id: the new id | |
461 | * | |
462 | * Finds the control with the old id from the card, and replaces the | |
463 | * id with the new one. | |
464 | * | |
465 | * Returns zero if successful, or a negative error code on failure. | |
466 | */ | |
82e9bae6 TI |
467 | int snd_ctl_rename_id(struct snd_card *card, struct snd_ctl_elem_id *src_id, |
468 | struct snd_ctl_elem_id *dst_id) | |
1da177e4 | 469 | { |
82e9bae6 | 470 | struct snd_kcontrol *kctl; |
1da177e4 LT |
471 | |
472 | down_write(&card->controls_rwsem); | |
473 | kctl = snd_ctl_find_id(card, src_id); | |
474 | if (kctl == NULL) { | |
475 | up_write(&card->controls_rwsem); | |
476 | return -ENOENT; | |
477 | } | |
478 | kctl->id = *dst_id; | |
479 | kctl->id.numid = card->last_numid + 1; | |
480 | card->last_numid += kctl->count; | |
481 | up_write(&card->controls_rwsem); | |
482 | return 0; | |
483 | } | |
484 | ||
c0d3fb39 TI |
485 | EXPORT_SYMBOL(snd_ctl_rename_id); |
486 | ||
1da177e4 LT |
487 | /** |
488 | * snd_ctl_find_numid - find the control instance with the given number-id | |
489 | * @card: the card instance | |
490 | * @numid: the number-id to search | |
491 | * | |
492 | * Finds the control instance with the given number-id from the card. | |
493 | * | |
494 | * Returns the pointer of the instance if found, or NULL if not. | |
495 | * | |
496 | * The caller must down card->controls_rwsem before calling this function | |
497 | * (if the race condition can happen). | |
498 | */ | |
82e9bae6 | 499 | struct snd_kcontrol *snd_ctl_find_numid(struct snd_card *card, unsigned int numid) |
1da177e4 LT |
500 | { |
501 | struct list_head *list; | |
82e9bae6 | 502 | struct snd_kcontrol *kctl; |
1da177e4 | 503 | |
7c22f1aa | 504 | snd_assert(card != NULL && numid != 0, return NULL); |
1da177e4 LT |
505 | list_for_each(list, &card->controls) { |
506 | kctl = snd_kcontrol(list); | |
507 | if (kctl->id.numid <= numid && kctl->id.numid + kctl->count > numid) | |
508 | return kctl; | |
509 | } | |
510 | return NULL; | |
511 | } | |
512 | ||
c0d3fb39 TI |
513 | EXPORT_SYMBOL(snd_ctl_find_numid); |
514 | ||
1da177e4 LT |
515 | /** |
516 | * snd_ctl_find_id - find the control instance with the given id | |
517 | * @card: the card instance | |
518 | * @id: the id to search | |
519 | * | |
520 | * Finds the control instance with the given id from the card. | |
521 | * | |
522 | * Returns the pointer of the instance if found, or NULL if not. | |
523 | * | |
524 | * The caller must down card->controls_rwsem before calling this function | |
525 | * (if the race condition can happen). | |
526 | */ | |
82e9bae6 TI |
527 | struct snd_kcontrol *snd_ctl_find_id(struct snd_card *card, |
528 | struct snd_ctl_elem_id *id) | |
1da177e4 LT |
529 | { |
530 | struct list_head *list; | |
82e9bae6 | 531 | struct snd_kcontrol *kctl; |
1da177e4 | 532 | |
7c22f1aa | 533 | snd_assert(card != NULL && id != NULL, return NULL); |
1da177e4 LT |
534 | if (id->numid != 0) |
535 | return snd_ctl_find_numid(card, id->numid); | |
536 | list_for_each(list, &card->controls) { | |
537 | kctl = snd_kcontrol(list); | |
538 | if (kctl->id.iface != id->iface) | |
539 | continue; | |
540 | if (kctl->id.device != id->device) | |
541 | continue; | |
542 | if (kctl->id.subdevice != id->subdevice) | |
543 | continue; | |
544 | if (strncmp(kctl->id.name, id->name, sizeof(kctl->id.name))) | |
545 | continue; | |
546 | if (kctl->id.index > id->index) | |
547 | continue; | |
548 | if (kctl->id.index + kctl->count <= id->index) | |
549 | continue; | |
550 | return kctl; | |
551 | } | |
552 | return NULL; | |
553 | } | |
554 | ||
c0d3fb39 TI |
555 | EXPORT_SYMBOL(snd_ctl_find_id); |
556 | ||
82e9bae6 | 557 | static int snd_ctl_card_info(struct snd_card *card, struct snd_ctl_file * ctl, |
1da177e4 LT |
558 | unsigned int cmd, void __user *arg) |
559 | { | |
82e9bae6 | 560 | struct snd_ctl_card_info *info; |
1da177e4 | 561 | |
ca2c0966 | 562 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
563 | if (! info) |
564 | return -ENOMEM; | |
565 | down_read(&snd_ioctl_rwsem); | |
566 | info->card = card->number; | |
567 | strlcpy(info->id, card->id, sizeof(info->id)); | |
568 | strlcpy(info->driver, card->driver, sizeof(info->driver)); | |
569 | strlcpy(info->name, card->shortname, sizeof(info->name)); | |
570 | strlcpy(info->longname, card->longname, sizeof(info->longname)); | |
571 | strlcpy(info->mixername, card->mixername, sizeof(info->mixername)); | |
572 | strlcpy(info->components, card->components, sizeof(info->components)); | |
573 | up_read(&snd_ioctl_rwsem); | |
82e9bae6 | 574 | if (copy_to_user(arg, info, sizeof(struct snd_ctl_card_info))) { |
1da177e4 LT |
575 | kfree(info); |
576 | return -EFAULT; | |
577 | } | |
578 | kfree(info); | |
579 | return 0; | |
580 | } | |
581 | ||
82e9bae6 TI |
582 | static int snd_ctl_elem_list(struct snd_card *card, |
583 | struct snd_ctl_elem_list __user *_list) | |
1da177e4 LT |
584 | { |
585 | struct list_head *plist; | |
82e9bae6 TI |
586 | struct snd_ctl_elem_list list; |
587 | struct snd_kcontrol *kctl; | |
588 | struct snd_ctl_elem_id *dst, *id; | |
1da177e4 LT |
589 | unsigned int offset, space, first, jidx; |
590 | ||
591 | if (copy_from_user(&list, _list, sizeof(list))) | |
592 | return -EFAULT; | |
593 | offset = list.offset; | |
594 | space = list.space; | |
595 | first = 0; | |
596 | /* try limit maximum space */ | |
597 | if (space > 16384) | |
598 | return -ENOMEM; | |
599 | if (space > 0) { | |
600 | /* allocate temporary buffer for atomic operation */ | |
82e9bae6 | 601 | dst = vmalloc(space * sizeof(struct snd_ctl_elem_id)); |
1da177e4 LT |
602 | if (dst == NULL) |
603 | return -ENOMEM; | |
604 | down_read(&card->controls_rwsem); | |
605 | list.count = card->controls_count; | |
606 | plist = card->controls.next; | |
607 | while (plist != &card->controls) { | |
608 | if (offset == 0) | |
609 | break; | |
610 | kctl = snd_kcontrol(plist); | |
611 | if (offset < kctl->count) | |
612 | break; | |
613 | offset -= kctl->count; | |
614 | plist = plist->next; | |
615 | } | |
616 | list.used = 0; | |
617 | id = dst; | |
618 | while (space > 0 && plist != &card->controls) { | |
619 | kctl = snd_kcontrol(plist); | |
620 | for (jidx = offset; space > 0 && jidx < kctl->count; jidx++) { | |
621 | snd_ctl_build_ioff(id, kctl, jidx); | |
622 | id++; | |
623 | space--; | |
624 | list.used++; | |
625 | } | |
626 | plist = plist->next; | |
627 | offset = 0; | |
628 | } | |
629 | up_read(&card->controls_rwsem); | |
82e9bae6 TI |
630 | if (list.used > 0 && |
631 | copy_to_user(list.pids, dst, | |
632 | list.used * sizeof(struct snd_ctl_elem_id))) { | |
1da177e4 LT |
633 | vfree(dst); |
634 | return -EFAULT; | |
635 | } | |
636 | vfree(dst); | |
637 | } else { | |
638 | down_read(&card->controls_rwsem); | |
639 | list.count = card->controls_count; | |
640 | up_read(&card->controls_rwsem); | |
641 | } | |
642 | if (copy_to_user(_list, &list, sizeof(list))) | |
643 | return -EFAULT; | |
644 | return 0; | |
645 | } | |
646 | ||
82e9bae6 TI |
647 | static int snd_ctl_elem_info(struct snd_ctl_file *ctl, |
648 | struct snd_ctl_elem_info *info) | |
1da177e4 | 649 | { |
82e9bae6 TI |
650 | struct snd_card *card = ctl->card; |
651 | struct snd_kcontrol *kctl; | |
652 | struct snd_kcontrol_volatile *vd; | |
1da177e4 LT |
653 | unsigned int index_offset; |
654 | int result; | |
655 | ||
656 | down_read(&card->controls_rwsem); | |
657 | kctl = snd_ctl_find_id(card, &info->id); | |
658 | if (kctl == NULL) { | |
659 | up_read(&card->controls_rwsem); | |
660 | return -ENOENT; | |
661 | } | |
662 | #ifdef CONFIG_SND_DEBUG | |
663 | info->access = 0; | |
664 | #endif | |
665 | result = kctl->info(kctl, info); | |
666 | if (result >= 0) { | |
667 | snd_assert(info->access == 0, ); | |
668 | index_offset = snd_ctl_get_ioff(kctl, &info->id); | |
669 | vd = &kctl->vd[index_offset]; | |
670 | snd_ctl_build_ioff(&info->id, kctl, index_offset); | |
671 | info->access = vd->access; | |
672 | if (vd->owner) { | |
673 | info->access |= SNDRV_CTL_ELEM_ACCESS_LOCK; | |
674 | if (vd->owner == ctl) | |
675 | info->access |= SNDRV_CTL_ELEM_ACCESS_OWNER; | |
676 | info->owner = vd->owner_pid; | |
677 | } else { | |
678 | info->owner = -1; | |
679 | } | |
680 | } | |
681 | up_read(&card->controls_rwsem); | |
682 | return result; | |
683 | } | |
684 | ||
82e9bae6 TI |
685 | static int snd_ctl_elem_info_user(struct snd_ctl_file *ctl, |
686 | struct snd_ctl_elem_info __user *_info) | |
1da177e4 | 687 | { |
82e9bae6 | 688 | struct snd_ctl_elem_info info; |
1da177e4 LT |
689 | int result; |
690 | ||
691 | if (copy_from_user(&info, _info, sizeof(info))) | |
692 | return -EFAULT; | |
64649400 | 693 | snd_power_lock(ctl->card); |
cbac4b0c | 694 | result = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0); |
64649400 GP |
695 | if (result >= 0) |
696 | result = snd_ctl_elem_info(ctl, &info); | |
697 | snd_power_unlock(ctl->card); | |
1da177e4 LT |
698 | if (result >= 0) |
699 | if (copy_to_user(_info, &info, sizeof(info))) | |
700 | return -EFAULT; | |
701 | return result; | |
702 | } | |
703 | ||
82e9bae6 | 704 | int snd_ctl_elem_read(struct snd_card *card, struct snd_ctl_elem_value *control) |
1da177e4 | 705 | { |
82e9bae6 TI |
706 | struct snd_kcontrol *kctl; |
707 | struct snd_kcontrol_volatile *vd; | |
1da177e4 LT |
708 | unsigned int index_offset; |
709 | int result, indirect; | |
710 | ||
711 | down_read(&card->controls_rwsem); | |
712 | kctl = snd_ctl_find_id(card, &control->id); | |
713 | if (kctl == NULL) { | |
714 | result = -ENOENT; | |
715 | } else { | |
716 | index_offset = snd_ctl_get_ioff(kctl, &control->id); | |
717 | vd = &kctl->vd[index_offset]; | |
718 | indirect = vd->access & SNDRV_CTL_ELEM_ACCESS_INDIRECT ? 1 : 0; | |
719 | if (control->indirect != indirect) { | |
720 | result = -EACCES; | |
721 | } else { | |
722 | if ((vd->access & SNDRV_CTL_ELEM_ACCESS_READ) && kctl->get != NULL) { | |
723 | snd_ctl_build_ioff(&control->id, kctl, index_offset); | |
724 | result = kctl->get(kctl, control); | |
725 | } else { | |
726 | result = -EPERM; | |
727 | } | |
728 | } | |
729 | } | |
730 | up_read(&card->controls_rwsem); | |
731 | return result; | |
732 | } | |
733 | ||
c0d3fb39 TI |
734 | EXPORT_SYMBOL(snd_ctl_elem_read); |
735 | ||
82e9bae6 TI |
736 | static int snd_ctl_elem_read_user(struct snd_card *card, |
737 | struct snd_ctl_elem_value __user *_control) | |
1da177e4 | 738 | { |
82e9bae6 | 739 | struct snd_ctl_elem_value *control; |
1da177e4 LT |
740 | int result; |
741 | ||
742 | control = kmalloc(sizeof(*control), GFP_KERNEL); | |
743 | if (control == NULL) | |
744 | return -ENOMEM; | |
745 | if (copy_from_user(control, _control, sizeof(*control))) { | |
746 | kfree(control); | |
747 | return -EFAULT; | |
748 | } | |
64649400 | 749 | snd_power_lock(card); |
cbac4b0c | 750 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
64649400 GP |
751 | if (result >= 0) |
752 | result = snd_ctl_elem_read(card, control); | |
753 | snd_power_unlock(card); | |
1da177e4 LT |
754 | if (result >= 0) |
755 | if (copy_to_user(_control, control, sizeof(*control))) | |
756 | result = -EFAULT; | |
757 | kfree(control); | |
758 | return result; | |
759 | } | |
760 | ||
82e9bae6 TI |
761 | int snd_ctl_elem_write(struct snd_card *card, struct snd_ctl_file *file, |
762 | struct snd_ctl_elem_value *control) | |
1da177e4 | 763 | { |
82e9bae6 TI |
764 | struct snd_kcontrol *kctl; |
765 | struct snd_kcontrol_volatile *vd; | |
1da177e4 LT |
766 | unsigned int index_offset; |
767 | int result, indirect; | |
768 | ||
769 | down_read(&card->controls_rwsem); | |
770 | kctl = snd_ctl_find_id(card, &control->id); | |
771 | if (kctl == NULL) { | |
772 | result = -ENOENT; | |
773 | } else { | |
774 | index_offset = snd_ctl_get_ioff(kctl, &control->id); | |
775 | vd = &kctl->vd[index_offset]; | |
776 | indirect = vd->access & SNDRV_CTL_ELEM_ACCESS_INDIRECT ? 1 : 0; | |
777 | if (control->indirect != indirect) { | |
778 | result = -EACCES; | |
779 | } else { | |
780 | if (!(vd->access & SNDRV_CTL_ELEM_ACCESS_WRITE) || | |
781 | kctl->put == NULL || | |
782 | (file && vd->owner != NULL && vd->owner != file)) { | |
783 | result = -EPERM; | |
784 | } else { | |
785 | snd_ctl_build_ioff(&control->id, kctl, index_offset); | |
786 | result = kctl->put(kctl, control); | |
787 | } | |
788 | if (result > 0) { | |
789 | up_read(&card->controls_rwsem); | |
790 | snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &control->id); | |
791 | return 0; | |
792 | } | |
793 | } | |
794 | } | |
795 | up_read(&card->controls_rwsem); | |
796 | return result; | |
797 | } | |
798 | ||
c0d3fb39 TI |
799 | EXPORT_SYMBOL(snd_ctl_elem_write); |
800 | ||
82e9bae6 TI |
801 | static int snd_ctl_elem_write_user(struct snd_ctl_file *file, |
802 | struct snd_ctl_elem_value __user *_control) | |
1da177e4 | 803 | { |
82e9bae6 | 804 | struct snd_ctl_elem_value *control; |
64649400 | 805 | struct snd_card *card; |
1da177e4 LT |
806 | int result; |
807 | ||
808 | control = kmalloc(sizeof(*control), GFP_KERNEL); | |
809 | if (control == NULL) | |
810 | return -ENOMEM; | |
811 | if (copy_from_user(control, _control, sizeof(*control))) { | |
812 | kfree(control); | |
813 | return -EFAULT; | |
814 | } | |
64649400 GP |
815 | card = file->card; |
816 | snd_power_lock(card); | |
cbac4b0c | 817 | result = snd_power_wait(card, SNDRV_CTL_POWER_D0); |
64649400 GP |
818 | if (result >= 0) |
819 | result = snd_ctl_elem_write(card, file, control); | |
820 | snd_power_unlock(card); | |
1da177e4 LT |
821 | if (result >= 0) |
822 | if (copy_to_user(_control, control, sizeof(*control))) | |
823 | result = -EFAULT; | |
824 | kfree(control); | |
825 | return result; | |
826 | } | |
827 | ||
82e9bae6 TI |
828 | static int snd_ctl_elem_lock(struct snd_ctl_file *file, |
829 | struct snd_ctl_elem_id __user *_id) | |
1da177e4 | 830 | { |
82e9bae6 TI |
831 | struct snd_card *card = file->card; |
832 | struct snd_ctl_elem_id id; | |
833 | struct snd_kcontrol *kctl; | |
834 | struct snd_kcontrol_volatile *vd; | |
1da177e4 LT |
835 | int result; |
836 | ||
837 | if (copy_from_user(&id, _id, sizeof(id))) | |
838 | return -EFAULT; | |
839 | down_write(&card->controls_rwsem); | |
840 | kctl = snd_ctl_find_id(card, &id); | |
841 | if (kctl == NULL) { | |
842 | result = -ENOENT; | |
843 | } else { | |
844 | vd = &kctl->vd[snd_ctl_get_ioff(kctl, &id)]; | |
845 | if (vd->owner != NULL) | |
846 | result = -EBUSY; | |
847 | else { | |
848 | vd->owner = file; | |
849 | vd->owner_pid = current->pid; | |
850 | result = 0; | |
851 | } | |
852 | } | |
853 | up_write(&card->controls_rwsem); | |
854 | return result; | |
855 | } | |
856 | ||
82e9bae6 TI |
857 | static int snd_ctl_elem_unlock(struct snd_ctl_file *file, |
858 | struct snd_ctl_elem_id __user *_id) | |
1da177e4 | 859 | { |
82e9bae6 TI |
860 | struct snd_card *card = file->card; |
861 | struct snd_ctl_elem_id id; | |
862 | struct snd_kcontrol *kctl; | |
863 | struct snd_kcontrol_volatile *vd; | |
1da177e4 LT |
864 | int result; |
865 | ||
866 | if (copy_from_user(&id, _id, sizeof(id))) | |
867 | return -EFAULT; | |
868 | down_write(&card->controls_rwsem); | |
869 | kctl = snd_ctl_find_id(card, &id); | |
870 | if (kctl == NULL) { | |
871 | result = -ENOENT; | |
872 | } else { | |
873 | vd = &kctl->vd[snd_ctl_get_ioff(kctl, &id)]; | |
874 | if (vd->owner == NULL) | |
875 | result = -EINVAL; | |
876 | else if (vd->owner != file) | |
877 | result = -EPERM; | |
878 | else { | |
879 | vd->owner = NULL; | |
880 | vd->owner_pid = 0; | |
881 | result = 0; | |
882 | } | |
883 | } | |
884 | up_write(&card->controls_rwsem); | |
885 | return result; | |
886 | } | |
887 | ||
888 | struct user_element { | |
82e9bae6 | 889 | struct snd_ctl_elem_info info; |
1da177e4 LT |
890 | void *elem_data; /* element data */ |
891 | unsigned long elem_data_size; /* size of element data in bytes */ | |
8aa9b586 JK |
892 | void *tlv_data; /* TLV data */ |
893 | unsigned long tlv_data_size; /* TLV data size */ | |
1da177e4 LT |
894 | void *priv_data; /* private data (like strings for enumerated type) */ |
895 | unsigned long priv_data_size; /* size of private data in bytes */ | |
896 | }; | |
897 | ||
82e9bae6 TI |
898 | static int snd_ctl_elem_user_info(struct snd_kcontrol *kcontrol, |
899 | struct snd_ctl_elem_info *uinfo) | |
1da177e4 LT |
900 | { |
901 | struct user_element *ue = kcontrol->private_data; | |
902 | ||
903 | *uinfo = ue->info; | |
904 | return 0; | |
905 | } | |
906 | ||
82e9bae6 TI |
907 | static int snd_ctl_elem_user_get(struct snd_kcontrol *kcontrol, |
908 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 LT |
909 | { |
910 | struct user_element *ue = kcontrol->private_data; | |
911 | ||
912 | memcpy(&ucontrol->value, ue->elem_data, ue->elem_data_size); | |
913 | return 0; | |
914 | } | |
915 | ||
82e9bae6 TI |
916 | static int snd_ctl_elem_user_put(struct snd_kcontrol *kcontrol, |
917 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 LT |
918 | { |
919 | int change; | |
920 | struct user_element *ue = kcontrol->private_data; | |
921 | ||
922 | change = memcmp(&ucontrol->value, ue->elem_data, ue->elem_data_size) != 0; | |
923 | if (change) | |
924 | memcpy(ue->elem_data, &ucontrol->value, ue->elem_data_size); | |
925 | return change; | |
926 | } | |
927 | ||
8aa9b586 JK |
928 | static int snd_ctl_elem_user_tlv(struct snd_kcontrol *kcontrol, |
929 | int op_flag, | |
930 | unsigned int size, | |
931 | unsigned int __user *tlv) | |
932 | { | |
933 | struct user_element *ue = kcontrol->private_data; | |
934 | int change = 0; | |
935 | void *new_data; | |
936 | ||
937 | if (op_flag > 0) { | |
938 | if (size > 1024 * 128) /* sane value */ | |
939 | return -EINVAL; | |
940 | new_data = kmalloc(size, GFP_KERNEL); | |
941 | if (new_data == NULL) | |
942 | return -ENOMEM; | |
943 | if (copy_from_user(new_data, tlv, size)) { | |
944 | kfree(new_data); | |
945 | return -EFAULT; | |
946 | } | |
947 | change = ue->tlv_data_size != size; | |
948 | if (!change) | |
949 | change = memcmp(ue->tlv_data, new_data, size); | |
950 | kfree(ue->tlv_data); | |
951 | ue->tlv_data = new_data; | |
952 | ue->tlv_data_size = size; | |
953 | } else { | |
954 | if (size < ue->tlv_data_size) | |
955 | return -ENOSPC; | |
956 | if (copy_to_user(tlv, ue->tlv_data, ue->tlv_data_size)) | |
957 | return -EFAULT; | |
958 | } | |
959 | return change; | |
960 | } | |
961 | ||
82e9bae6 | 962 | static void snd_ctl_elem_user_free(struct snd_kcontrol *kcontrol) |
1da177e4 | 963 | { |
8aa9b586 JK |
964 | struct user_element *ue = kcontrol->private_data; |
965 | if (ue->tlv_data) | |
966 | kfree(ue->tlv_data); | |
967 | kfree(ue); | |
1da177e4 LT |
968 | } |
969 | ||
82e9bae6 TI |
970 | static int snd_ctl_elem_add(struct snd_ctl_file *file, |
971 | struct snd_ctl_elem_info *info, int replace) | |
1da177e4 | 972 | { |
82e9bae6 TI |
973 | struct snd_card *card = file->card; |
974 | struct snd_kcontrol kctl, *_kctl; | |
1da177e4 LT |
975 | unsigned int access; |
976 | long private_size; | |
977 | struct user_element *ue; | |
978 | int idx, err; | |
979 | ||
980 | if (card->user_ctl_count >= MAX_USER_CONTROLS) | |
981 | return -ENOMEM; | |
982 | if (info->count > 1024) | |
983 | return -EINVAL; | |
984 | access = info->access == 0 ? SNDRV_CTL_ELEM_ACCESS_READWRITE : | |
82e9bae6 | 985 | (info->access & (SNDRV_CTL_ELEM_ACCESS_READWRITE| |
8aa9b586 JK |
986 | SNDRV_CTL_ELEM_ACCESS_INACTIVE| |
987 | SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE)); | |
1da177e4 LT |
988 | info->id.numid = 0; |
989 | memset(&kctl, 0, sizeof(kctl)); | |
990 | down_write(&card->controls_rwsem); | |
991 | _kctl = snd_ctl_find_id(card, &info->id); | |
992 | err = 0; | |
993 | if (_kctl) { | |
994 | if (replace) | |
995 | err = snd_ctl_remove(card, _kctl); | |
996 | else | |
997 | err = -EBUSY; | |
998 | } else { | |
999 | if (replace) | |
1000 | err = -ENOENT; | |
1001 | } | |
1002 | up_write(&card->controls_rwsem); | |
1003 | if (err < 0) | |
1004 | return err; | |
1005 | memcpy(&kctl.id, &info->id, sizeof(info->id)); | |
1006 | kctl.count = info->owner ? info->owner : 1; | |
1007 | access |= SNDRV_CTL_ELEM_ACCESS_USER; | |
1008 | kctl.info = snd_ctl_elem_user_info; | |
1009 | if (access & SNDRV_CTL_ELEM_ACCESS_READ) | |
1010 | kctl.get = snd_ctl_elem_user_get; | |
1011 | if (access & SNDRV_CTL_ELEM_ACCESS_WRITE) | |
1012 | kctl.put = snd_ctl_elem_user_put; | |
8aa9b586 JK |
1013 | if (access & SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE) { |
1014 | kctl.tlv.c = snd_ctl_elem_user_tlv; | |
1015 | access |= SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK; | |
1016 | } | |
1da177e4 LT |
1017 | switch (info->type) { |
1018 | case SNDRV_CTL_ELEM_TYPE_BOOLEAN: | |
1019 | private_size = sizeof(char); | |
1020 | if (info->count > 128) | |
1021 | return -EINVAL; | |
1022 | break; | |
1023 | case SNDRV_CTL_ELEM_TYPE_INTEGER: | |
1024 | private_size = sizeof(long); | |
1025 | if (info->count > 128) | |
1026 | return -EINVAL; | |
1027 | break; | |
1028 | case SNDRV_CTL_ELEM_TYPE_INTEGER64: | |
1029 | private_size = sizeof(long long); | |
1030 | if (info->count > 64) | |
1031 | return -EINVAL; | |
1032 | break; | |
1033 | case SNDRV_CTL_ELEM_TYPE_BYTES: | |
1034 | private_size = sizeof(unsigned char); | |
1035 | if (info->count > 512) | |
1036 | return -EINVAL; | |
1037 | break; | |
1038 | case SNDRV_CTL_ELEM_TYPE_IEC958: | |
82e9bae6 | 1039 | private_size = sizeof(struct snd_aes_iec958); |
1da177e4 LT |
1040 | if (info->count != 1) |
1041 | return -EINVAL; | |
1042 | break; | |
1043 | default: | |
1044 | return -EINVAL; | |
1045 | } | |
1046 | private_size *= info->count; | |
ca2c0966 | 1047 | ue = kzalloc(sizeof(struct user_element) + private_size, GFP_KERNEL); |
1da177e4 LT |
1048 | if (ue == NULL) |
1049 | return -ENOMEM; | |
1050 | ue->info = *info; | |
1051 | ue->elem_data = (char *)ue + sizeof(*ue); | |
1052 | ue->elem_data_size = private_size; | |
1053 | kctl.private_free = snd_ctl_elem_user_free; | |
1054 | _kctl = snd_ctl_new(&kctl, access); | |
1055 | if (_kctl == NULL) { | |
2fbf182e | 1056 | kfree(ue); |
1da177e4 LT |
1057 | return -ENOMEM; |
1058 | } | |
1059 | _kctl->private_data = ue; | |
1060 | for (idx = 0; idx < _kctl->count; idx++) | |
1061 | _kctl->vd[idx].owner = file; | |
1062 | err = snd_ctl_add(card, _kctl); | |
2fbf182e | 1063 | if (err < 0) |
1da177e4 | 1064 | return err; |
1da177e4 LT |
1065 | |
1066 | down_write(&card->controls_rwsem); | |
1067 | card->user_ctl_count++; | |
1068 | up_write(&card->controls_rwsem); | |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | ||
82e9bae6 TI |
1073 | static int snd_ctl_elem_add_user(struct snd_ctl_file *file, |
1074 | struct snd_ctl_elem_info __user *_info, int replace) | |
1da177e4 | 1075 | { |
82e9bae6 | 1076 | struct snd_ctl_elem_info info; |
1da177e4 LT |
1077 | if (copy_from_user(&info, _info, sizeof(info))) |
1078 | return -EFAULT; | |
1079 | return snd_ctl_elem_add(file, &info, replace); | |
1080 | } | |
1081 | ||
82e9bae6 TI |
1082 | static int snd_ctl_elem_remove(struct snd_ctl_file *file, |
1083 | struct snd_ctl_elem_id __user *_id) | |
1da177e4 | 1084 | { |
82e9bae6 | 1085 | struct snd_ctl_elem_id id; |
1da177e4 LT |
1086 | int err; |
1087 | ||
1088 | if (copy_from_user(&id, _id, sizeof(id))) | |
1089 | return -EFAULT; | |
1090 | err = snd_ctl_remove_unlocked_id(file, &id); | |
1091 | if (! err) { | |
82e9bae6 | 1092 | struct snd_card *card = file->card; |
1da177e4 LT |
1093 | down_write(&card->controls_rwsem); |
1094 | card->user_ctl_count--; | |
1095 | up_write(&card->controls_rwsem); | |
1096 | } | |
1097 | return err; | |
1098 | } | |
1099 | ||
82e9bae6 | 1100 | static int snd_ctl_subscribe_events(struct snd_ctl_file *file, int __user *ptr) |
1da177e4 LT |
1101 | { |
1102 | int subscribe; | |
1103 | if (get_user(subscribe, ptr)) | |
1104 | return -EFAULT; | |
1105 | if (subscribe < 0) { | |
1106 | subscribe = file->subscribed; | |
1107 | if (put_user(subscribe, ptr)) | |
1108 | return -EFAULT; | |
1109 | return 0; | |
1110 | } | |
1111 | if (subscribe) { | |
1112 | file->subscribed = 1; | |
1113 | return 0; | |
1114 | } else if (file->subscribed) { | |
1115 | snd_ctl_empty_read_queue(file); | |
1116 | file->subscribed = 0; | |
1117 | } | |
1118 | return 0; | |
1119 | } | |
1120 | ||
8aa9b586 JK |
1121 | static int snd_ctl_tlv_ioctl(struct snd_ctl_file *file, |
1122 | struct snd_ctl_tlv __user *_tlv, | |
1123 | int op_flag) | |
42750b04 | 1124 | { |
8aa9b586 | 1125 | struct snd_card *card = file->card; |
42750b04 JK |
1126 | struct snd_ctl_tlv tlv; |
1127 | struct snd_kcontrol *kctl; | |
8aa9b586 | 1128 | struct snd_kcontrol_volatile *vd; |
42750b04 JK |
1129 | unsigned int len; |
1130 | int err = 0; | |
1131 | ||
1132 | if (copy_from_user(&tlv, _tlv, sizeof(tlv))) | |
1133 | return -EFAULT; | |
8aa9b586 JK |
1134 | if (tlv.length < sizeof(unsigned int) * 3) |
1135 | return -EINVAL; | |
1136 | down_read(&card->controls_rwsem); | |
1137 | kctl = snd_ctl_find_numid(card, tlv.numid); | |
1138 | if (kctl == NULL) { | |
1139 | err = -ENOENT; | |
1140 | goto __kctl_end; | |
1141 | } | |
1142 | if (kctl->tlv.p == NULL) { | |
1143 | err = -ENXIO; | |
1144 | goto __kctl_end; | |
1145 | } | |
1146 | vd = &kctl->vd[tlv.numid - kctl->id.numid]; | |
1147 | if ((op_flag == 0 && (vd->access & SNDRV_CTL_ELEM_ACCESS_TLV_READ) == 0) || | |
1148 | (op_flag > 0 && (vd->access & SNDRV_CTL_ELEM_ACCESS_TLV_WRITE) == 0) || | |
1149 | (op_flag < 0 && (vd->access & SNDRV_CTL_ELEM_ACCESS_TLV_COMMAND) == 0)) { | |
1150 | err = -ENXIO; | |
1151 | goto __kctl_end; | |
1152 | } | |
1153 | if (vd->access & SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK) { | |
1154 | if (file && vd->owner != NULL && vd->owner != file) { | |
1155 | err = -EPERM; | |
1156 | goto __kctl_end; | |
1157 | } | |
1158 | err = kctl->tlv.c(kctl, op_flag, tlv.length, _tlv->tlv); | |
1159 | if (err > 0) { | |
1160 | up_read(&card->controls_rwsem); | |
1161 | snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_TLV, &kctl->id); | |
1162 | return 0; | |
1163 | } | |
1164 | } else { | |
1165 | if (op_flag) { | |
1166 | err = -ENXIO; | |
1167 | goto __kctl_end; | |
1168 | } | |
1169 | len = kctl->tlv.p[1] + 2 * sizeof(unsigned int); | |
1170 | if (tlv.length < len) { | |
1171 | err = -ENOMEM; | |
1172 | goto __kctl_end; | |
1173 | } | |
1174 | if (copy_to_user(_tlv->tlv, kctl->tlv.p, len)) | |
1175 | err = -EFAULT; | |
1176 | } | |
42750b04 | 1177 | __kctl_end: |
8aa9b586 JK |
1178 | up_read(&card->controls_rwsem); |
1179 | return err; | |
42750b04 JK |
1180 | } |
1181 | ||
1da177e4 LT |
1182 | static long snd_ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1183 | { | |
82e9bae6 TI |
1184 | struct snd_ctl_file *ctl; |
1185 | struct snd_card *card; | |
1da177e4 | 1186 | struct list_head *list; |
82e9bae6 | 1187 | struct snd_kctl_ioctl *p; |
1da177e4 LT |
1188 | void __user *argp = (void __user *)arg; |
1189 | int __user *ip = argp; | |
1190 | int err; | |
1191 | ||
1192 | ctl = file->private_data; | |
1193 | card = ctl->card; | |
1194 | snd_assert(card != NULL, return -ENXIO); | |
1195 | switch (cmd) { | |
1196 | case SNDRV_CTL_IOCTL_PVERSION: | |
1197 | return put_user(SNDRV_CTL_VERSION, ip) ? -EFAULT : 0; | |
1198 | case SNDRV_CTL_IOCTL_CARD_INFO: | |
1199 | return snd_ctl_card_info(card, ctl, cmd, argp); | |
1200 | case SNDRV_CTL_IOCTL_ELEM_LIST: | |
42750b04 | 1201 | return snd_ctl_elem_list(card, argp); |
1da177e4 LT |
1202 | case SNDRV_CTL_IOCTL_ELEM_INFO: |
1203 | return snd_ctl_elem_info_user(ctl, argp); | |
1204 | case SNDRV_CTL_IOCTL_ELEM_READ: | |
42750b04 | 1205 | return snd_ctl_elem_read_user(card, argp); |
1da177e4 LT |
1206 | case SNDRV_CTL_IOCTL_ELEM_WRITE: |
1207 | return snd_ctl_elem_write_user(ctl, argp); | |
1208 | case SNDRV_CTL_IOCTL_ELEM_LOCK: | |
1209 | return snd_ctl_elem_lock(ctl, argp); | |
1210 | case SNDRV_CTL_IOCTL_ELEM_UNLOCK: | |
1211 | return snd_ctl_elem_unlock(ctl, argp); | |
1212 | case SNDRV_CTL_IOCTL_ELEM_ADD: | |
1213 | return snd_ctl_elem_add_user(ctl, argp, 0); | |
1214 | case SNDRV_CTL_IOCTL_ELEM_REPLACE: | |
1215 | return snd_ctl_elem_add_user(ctl, argp, 1); | |
1216 | case SNDRV_CTL_IOCTL_ELEM_REMOVE: | |
1217 | return snd_ctl_elem_remove(ctl, argp); | |
1218 | case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS: | |
1219 | return snd_ctl_subscribe_events(ctl, ip); | |
8aa9b586 JK |
1220 | case SNDRV_CTL_IOCTL_TLV_READ: |
1221 | return snd_ctl_tlv_ioctl(ctl, argp, 0); | |
1222 | case SNDRV_CTL_IOCTL_TLV_WRITE: | |
1223 | return snd_ctl_tlv_ioctl(ctl, argp, 1); | |
1224 | case SNDRV_CTL_IOCTL_TLV_COMMAND: | |
1225 | return snd_ctl_tlv_ioctl(ctl, argp, -1); | |
1da177e4 | 1226 | case SNDRV_CTL_IOCTL_POWER: |
a381a7a6 | 1227 | return -ENOPROTOOPT; |
1da177e4 LT |
1228 | case SNDRV_CTL_IOCTL_POWER_STATE: |
1229 | #ifdef CONFIG_PM | |
1230 | return put_user(card->power_state, ip) ? -EFAULT : 0; | |
1231 | #else | |
1232 | return put_user(SNDRV_CTL_POWER_D0, ip) ? -EFAULT : 0; | |
1233 | #endif | |
1234 | } | |
1235 | down_read(&snd_ioctl_rwsem); | |
1236 | list_for_each(list, &snd_control_ioctls) { | |
82e9bae6 | 1237 | p = list_entry(list, struct snd_kctl_ioctl, list); |
1da177e4 LT |
1238 | err = p->fioctl(card, ctl, cmd, arg); |
1239 | if (err != -ENOIOCTLCMD) { | |
1240 | up_read(&snd_ioctl_rwsem); | |
1241 | return err; | |
1242 | } | |
1243 | } | |
1244 | up_read(&snd_ioctl_rwsem); | |
6d85be61 | 1245 | snd_printdd("unknown ioctl = 0x%x\n", cmd); |
1da177e4 LT |
1246 | return -ENOTTY; |
1247 | } | |
1248 | ||
82e9bae6 TI |
1249 | static ssize_t snd_ctl_read(struct file *file, char __user *buffer, |
1250 | size_t count, loff_t * offset) | |
1da177e4 | 1251 | { |
82e9bae6 | 1252 | struct snd_ctl_file *ctl; |
1da177e4 LT |
1253 | int err = 0; |
1254 | ssize_t result = 0; | |
1255 | ||
1256 | ctl = file->private_data; | |
1257 | snd_assert(ctl != NULL && ctl->card != NULL, return -ENXIO); | |
1258 | if (!ctl->subscribed) | |
1259 | return -EBADFD; | |
82e9bae6 | 1260 | if (count < sizeof(struct snd_ctl_event)) |
1da177e4 LT |
1261 | return -EINVAL; |
1262 | spin_lock_irq(&ctl->read_lock); | |
82e9bae6 TI |
1263 | while (count >= sizeof(struct snd_ctl_event)) { |
1264 | struct snd_ctl_event ev; | |
1265 | struct snd_kctl_event *kev; | |
1da177e4 LT |
1266 | while (list_empty(&ctl->events)) { |
1267 | wait_queue_t wait; | |
1268 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { | |
1269 | err = -EAGAIN; | |
1270 | goto __end_lock; | |
1271 | } | |
1272 | init_waitqueue_entry(&wait, current); | |
1273 | add_wait_queue(&ctl->change_sleep, &wait); | |
1274 | set_current_state(TASK_INTERRUPTIBLE); | |
1275 | spin_unlock_irq(&ctl->read_lock); | |
1276 | schedule(); | |
1277 | remove_wait_queue(&ctl->change_sleep, &wait); | |
1278 | if (signal_pending(current)) | |
1279 | return result > 0 ? result : -ERESTARTSYS; | |
1280 | spin_lock_irq(&ctl->read_lock); | |
1281 | } | |
1282 | kev = snd_kctl_event(ctl->events.next); | |
1283 | ev.type = SNDRV_CTL_EVENT_ELEM; | |
1284 | ev.data.elem.mask = kev->mask; | |
1285 | ev.data.elem.id = kev->id; | |
1286 | list_del(&kev->list); | |
1287 | spin_unlock_irq(&ctl->read_lock); | |
1288 | kfree(kev); | |
82e9bae6 | 1289 | if (copy_to_user(buffer, &ev, sizeof(struct snd_ctl_event))) { |
1da177e4 LT |
1290 | err = -EFAULT; |
1291 | goto __end; | |
1292 | } | |
1293 | spin_lock_irq(&ctl->read_lock); | |
82e9bae6 TI |
1294 | buffer += sizeof(struct snd_ctl_event); |
1295 | count -= sizeof(struct snd_ctl_event); | |
1296 | result += sizeof(struct snd_ctl_event); | |
1da177e4 LT |
1297 | } |
1298 | __end_lock: | |
1299 | spin_unlock_irq(&ctl->read_lock); | |
1300 | __end: | |
1301 | return result > 0 ? result : err; | |
1302 | } | |
1303 | ||
1304 | static unsigned int snd_ctl_poll(struct file *file, poll_table * wait) | |
1305 | { | |
1306 | unsigned int mask; | |
82e9bae6 | 1307 | struct snd_ctl_file *ctl; |
1da177e4 LT |
1308 | |
1309 | ctl = file->private_data; | |
1310 | if (!ctl->subscribed) | |
1311 | return 0; | |
1312 | poll_wait(file, &ctl->change_sleep, wait); | |
1313 | ||
1314 | mask = 0; | |
1315 | if (!list_empty(&ctl->events)) | |
1316 | mask |= POLLIN | POLLRDNORM; | |
1317 | ||
1318 | return mask; | |
1319 | } | |
1320 | ||
1321 | /* | |
1322 | * register the device-specific control-ioctls. | |
1323 | * called from each device manager like pcm.c, hwdep.c, etc. | |
1324 | */ | |
1325 | static int _snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn, struct list_head *lists) | |
1326 | { | |
82e9bae6 | 1327 | struct snd_kctl_ioctl *pn; |
1da177e4 | 1328 | |
82e9bae6 | 1329 | pn = kzalloc(sizeof(struct snd_kctl_ioctl), GFP_KERNEL); |
1da177e4 LT |
1330 | if (pn == NULL) |
1331 | return -ENOMEM; | |
1332 | pn->fioctl = fcn; | |
1333 | down_write(&snd_ioctl_rwsem); | |
1334 | list_add_tail(&pn->list, lists); | |
1335 | up_write(&snd_ioctl_rwsem); | |
1336 | return 0; | |
1337 | } | |
1338 | ||
1339 | int snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn) | |
1340 | { | |
1341 | return _snd_ctl_register_ioctl(fcn, &snd_control_ioctls); | |
1342 | } | |
1343 | ||
c0d3fb39 TI |
1344 | EXPORT_SYMBOL(snd_ctl_register_ioctl); |
1345 | ||
1da177e4 LT |
1346 | #ifdef CONFIG_COMPAT |
1347 | int snd_ctl_register_ioctl_compat(snd_kctl_ioctl_func_t fcn) | |
1348 | { | |
1349 | return _snd_ctl_register_ioctl(fcn, &snd_control_compat_ioctls); | |
1350 | } | |
c0d3fb39 TI |
1351 | |
1352 | EXPORT_SYMBOL(snd_ctl_register_ioctl_compat); | |
1da177e4 LT |
1353 | #endif |
1354 | ||
1355 | /* | |
1356 | * de-register the device-specific control-ioctls. | |
1357 | */ | |
82e9bae6 TI |
1358 | static int _snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn, |
1359 | struct list_head *lists) | |
1da177e4 LT |
1360 | { |
1361 | struct list_head *list; | |
82e9bae6 | 1362 | struct snd_kctl_ioctl *p; |
1da177e4 | 1363 | |
7c22f1aa | 1364 | snd_assert(fcn != NULL, return -EINVAL); |
1da177e4 LT |
1365 | down_write(&snd_ioctl_rwsem); |
1366 | list_for_each(list, lists) { | |
82e9bae6 | 1367 | p = list_entry(list, struct snd_kctl_ioctl, list); |
1da177e4 LT |
1368 | if (p->fioctl == fcn) { |
1369 | list_del(&p->list); | |
1370 | up_write(&snd_ioctl_rwsem); | |
1371 | kfree(p); | |
1372 | return 0; | |
1373 | } | |
1374 | } | |
1375 | up_write(&snd_ioctl_rwsem); | |
1376 | snd_BUG(); | |
1377 | return -EINVAL; | |
1378 | } | |
1379 | ||
1380 | int snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn) | |
1381 | { | |
1382 | return _snd_ctl_unregister_ioctl(fcn, &snd_control_ioctls); | |
1383 | } | |
1384 | ||
c0d3fb39 TI |
1385 | EXPORT_SYMBOL(snd_ctl_unregister_ioctl); |
1386 | ||
1da177e4 LT |
1387 | #ifdef CONFIG_COMPAT |
1388 | int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn) | |
1389 | { | |
1390 | return _snd_ctl_unregister_ioctl(fcn, &snd_control_compat_ioctls); | |
1391 | } | |
1392 | ||
c0d3fb39 | 1393 | EXPORT_SYMBOL(snd_ctl_unregister_ioctl_compat); |
1da177e4 LT |
1394 | #endif |
1395 | ||
1396 | static int snd_ctl_fasync(int fd, struct file * file, int on) | |
1397 | { | |
82e9bae6 | 1398 | struct snd_ctl_file *ctl; |
1da177e4 LT |
1399 | int err; |
1400 | ctl = file->private_data; | |
1401 | err = fasync_helper(fd, file, on, &ctl->fasync); | |
1402 | if (err < 0) | |
1403 | return err; | |
1404 | return 0; | |
1405 | } | |
1406 | ||
1407 | /* | |
1408 | * ioctl32 compat | |
1409 | */ | |
1410 | #ifdef CONFIG_COMPAT | |
1411 | #include "control_compat.c" | |
1412 | #else | |
1413 | #define snd_ctl_ioctl_compat NULL | |
1414 | #endif | |
1415 | ||
1416 | /* | |
1417 | * INIT PART | |
1418 | */ | |
1419 | ||
1420 | static struct file_operations snd_ctl_f_ops = | |
1421 | { | |
1422 | .owner = THIS_MODULE, | |
1423 | .read = snd_ctl_read, | |
1424 | .open = snd_ctl_open, | |
1425 | .release = snd_ctl_release, | |
1426 | .poll = snd_ctl_poll, | |
1427 | .unlocked_ioctl = snd_ctl_ioctl, | |
1428 | .compat_ioctl = snd_ctl_ioctl_compat, | |
1429 | .fasync = snd_ctl_fasync, | |
1430 | }; | |
1431 | ||
1da177e4 LT |
1432 | /* |
1433 | * registration of the control device | |
1434 | */ | |
82e9bae6 | 1435 | static int snd_ctl_dev_register(struct snd_device *device) |
1da177e4 | 1436 | { |
82e9bae6 | 1437 | struct snd_card *card = device->device_data; |
1da177e4 LT |
1438 | int err, cardnum; |
1439 | char name[16]; | |
1440 | ||
1441 | snd_assert(card != NULL, return -ENXIO); | |
1442 | cardnum = card->number; | |
1443 | snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO); | |
1444 | sprintf(name, "controlC%i", cardnum); | |
f87135f5 CL |
1445 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_CONTROL, card, -1, |
1446 | &snd_ctl_f_ops, card, name)) < 0) | |
1da177e4 LT |
1447 | return err; |
1448 | return 0; | |
1449 | } | |
1450 | ||
1451 | /* | |
1452 | * disconnection of the control device | |
1453 | */ | |
82e9bae6 | 1454 | static int snd_ctl_dev_disconnect(struct snd_device *device) |
1da177e4 | 1455 | { |
82e9bae6 | 1456 | struct snd_card *card = device->device_data; |
1da177e4 | 1457 | struct list_head *flist; |
82e9bae6 | 1458 | struct snd_ctl_file *ctl; |
c461482c TI |
1459 | int err, cardnum; |
1460 | ||
1461 | snd_assert(card != NULL, return -ENXIO); | |
1462 | cardnum = card->number; | |
1463 | snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO); | |
1da177e4 LT |
1464 | |
1465 | down_read(&card->controls_rwsem); | |
1466 | list_for_each(flist, &card->ctl_files) { | |
1467 | ctl = snd_ctl_file(flist); | |
1468 | wake_up(&ctl->change_sleep); | |
1469 | kill_fasync(&ctl->fasync, SIGIO, POLL_ERR); | |
1470 | } | |
1471 | up_read(&card->controls_rwsem); | |
c461482c TI |
1472 | |
1473 | if ((err = snd_unregister_device(SNDRV_DEVICE_TYPE_CONTROL, | |
1474 | card, -1)) < 0) | |
1475 | return err; | |
1da177e4 LT |
1476 | return 0; |
1477 | } | |
1478 | ||
1479 | /* | |
1480 | * free all controls | |
1481 | */ | |
82e9bae6 | 1482 | static int snd_ctl_dev_free(struct snd_device *device) |
1da177e4 | 1483 | { |
82e9bae6 TI |
1484 | struct snd_card *card = device->device_data; |
1485 | struct snd_kcontrol *control; | |
1da177e4 LT |
1486 | |
1487 | down_write(&card->controls_rwsem); | |
1488 | while (!list_empty(&card->controls)) { | |
1489 | control = snd_kcontrol(card->controls.next); | |
1490 | snd_ctl_remove(card, control); | |
1491 | } | |
1492 | up_write(&card->controls_rwsem); | |
1493 | return 0; | |
1494 | } | |
1495 | ||
1da177e4 LT |
1496 | /* |
1497 | * create control core: | |
1498 | * called from init.c | |
1499 | */ | |
82e9bae6 | 1500 | int snd_ctl_create(struct snd_card *card) |
1da177e4 | 1501 | { |
82e9bae6 | 1502 | static struct snd_device_ops ops = { |
1da177e4 LT |
1503 | .dev_free = snd_ctl_dev_free, |
1504 | .dev_register = snd_ctl_dev_register, | |
1505 | .dev_disconnect = snd_ctl_dev_disconnect, | |
1da177e4 LT |
1506 | }; |
1507 | ||
1508 | snd_assert(card != NULL, return -ENXIO); | |
1509 | return snd_device_new(card, SNDRV_DEV_CONTROL, card, &ops); | |
1510 | } |