Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Hardware dependent layer |
| 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/major.h> |
| 24 | #include <linux/init.h> |
| 25 | #include <linux/smp_lock.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/time.h> |
| 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 | |
| 34 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); |
| 35 | MODULE_DESCRIPTION("Hardware dependent layer"); |
| 36 | MODULE_LICENSE("GPL"); |
| 37 | |
| 38 | static snd_hwdep_t *snd_hwdep_devices[SNDRV_CARDS * SNDRV_MINOR_HWDEPS]; |
| 39 | |
| 40 | static DECLARE_MUTEX(register_mutex); |
| 41 | |
| 42 | static int snd_hwdep_free(snd_hwdep_t *hwdep); |
| 43 | static int snd_hwdep_dev_free(snd_device_t *device); |
| 44 | static int snd_hwdep_dev_register(snd_device_t *device); |
| 45 | static int snd_hwdep_dev_unregister(snd_device_t *device); |
| 46 | |
| 47 | /* |
| 48 | |
| 49 | */ |
| 50 | |
| 51 | static loff_t snd_hwdep_llseek(struct file * file, loff_t offset, int orig) |
| 52 | { |
| 53 | snd_hwdep_t *hw = file->private_data; |
| 54 | if (hw->ops.llseek) |
| 55 | return hw->ops.llseek(hw, file, offset, orig); |
| 56 | return -ENXIO; |
| 57 | } |
| 58 | |
| 59 | static ssize_t snd_hwdep_read(struct file * file, char __user *buf, size_t count, loff_t *offset) |
| 60 | { |
| 61 | snd_hwdep_t *hw = file->private_data; |
| 62 | if (hw->ops.read) |
| 63 | return hw->ops.read(hw, buf, count, offset); |
| 64 | return -ENXIO; |
| 65 | } |
| 66 | |
| 67 | static ssize_t snd_hwdep_write(struct file * file, const char __user *buf, size_t count, loff_t *offset) |
| 68 | { |
| 69 | snd_hwdep_t *hw = file->private_data; |
| 70 | if (hw->ops.write) |
| 71 | return hw->ops.write(hw, buf, count, offset); |
| 72 | return -ENXIO; |
| 73 | } |
| 74 | |
| 75 | static int snd_hwdep_open(struct inode *inode, struct file * file) |
| 76 | { |
| 77 | int major = imajor(inode); |
| 78 | int cardnum; |
| 79 | int device; |
| 80 | snd_hwdep_t *hw; |
| 81 | int err; |
| 82 | wait_queue_t wait; |
| 83 | |
Clemens Ladisch | f190286 | 2005-10-24 17:05:03 +0200 | [diff] [blame^] | 84 | if (major == snd_major) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | cardnum = SNDRV_MINOR_CARD(iminor(inode)); |
| 86 | device = SNDRV_MINOR_DEVICE(iminor(inode)) - SNDRV_MINOR_HWDEP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | #ifdef CONFIG_SND_OSSEMUL |
Clemens Ladisch | f190286 | 2005-10-24 17:05:03 +0200 | [diff] [blame^] | 88 | } else if (major == SOUND_MAJOR) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | cardnum = SNDRV_MINOR_OSS_CARD(iminor(inode)); |
| 90 | device = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | #endif |
Clemens Ladisch | f190286 | 2005-10-24 17:05:03 +0200 | [diff] [blame^] | 92 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | cardnum %= SNDRV_CARDS; |
| 95 | device %= SNDRV_MINOR_HWDEPS; |
| 96 | hw = snd_hwdep_devices[(cardnum * SNDRV_MINOR_HWDEPS) + device]; |
| 97 | if (hw == NULL) |
| 98 | return -ENODEV; |
| 99 | |
| 100 | if (!hw->ops.open) |
| 101 | return -ENXIO; |
| 102 | #ifdef CONFIG_SND_OSSEMUL |
| 103 | if (major == SOUND_MAJOR && hw->oss_type < 0) |
| 104 | return -ENXIO; |
| 105 | #endif |
| 106 | |
| 107 | if (!try_module_get(hw->card->module)) |
| 108 | return -EFAULT; |
| 109 | |
| 110 | init_waitqueue_entry(&wait, current); |
| 111 | add_wait_queue(&hw->open_wait, &wait); |
| 112 | down(&hw->open_mutex); |
| 113 | while (1) { |
| 114 | if (hw->exclusive && hw->used > 0) { |
| 115 | err = -EBUSY; |
| 116 | break; |
| 117 | } |
| 118 | err = hw->ops.open(hw, file); |
| 119 | if (err >= 0) |
| 120 | break; |
| 121 | if (err == -EAGAIN) { |
| 122 | if (file->f_flags & O_NONBLOCK) { |
| 123 | err = -EBUSY; |
| 124 | break; |
| 125 | } |
| 126 | } else |
| 127 | break; |
| 128 | set_current_state(TASK_INTERRUPTIBLE); |
| 129 | up(&hw->open_mutex); |
| 130 | schedule(); |
| 131 | down(&hw->open_mutex); |
| 132 | if (signal_pending(current)) { |
| 133 | err = -ERESTARTSYS; |
| 134 | break; |
| 135 | } |
| 136 | } |
| 137 | remove_wait_queue(&hw->open_wait, &wait); |
| 138 | if (err >= 0) { |
| 139 | err = snd_card_file_add(hw->card, file); |
| 140 | if (err >= 0) { |
| 141 | file->private_data = hw; |
| 142 | hw->used++; |
| 143 | } else { |
| 144 | if (hw->ops.release) |
| 145 | hw->ops.release(hw, file); |
| 146 | } |
| 147 | } |
| 148 | up(&hw->open_mutex); |
| 149 | if (err < 0) |
| 150 | module_put(hw->card->module); |
| 151 | return err; |
| 152 | } |
| 153 | |
| 154 | static int snd_hwdep_release(struct inode *inode, struct file * file) |
| 155 | { |
| 156 | int err = -ENXIO; |
| 157 | snd_hwdep_t *hw = file->private_data; |
| 158 | down(&hw->open_mutex); |
| 159 | if (hw->ops.release) { |
| 160 | err = hw->ops.release(hw, file); |
| 161 | wake_up(&hw->open_wait); |
| 162 | } |
| 163 | if (hw->used > 0) |
| 164 | hw->used--; |
| 165 | snd_card_file_remove(hw->card, file); |
| 166 | up(&hw->open_mutex); |
| 167 | module_put(hw->card->module); |
| 168 | return err; |
| 169 | } |
| 170 | |
| 171 | static unsigned int snd_hwdep_poll(struct file * file, poll_table * wait) |
| 172 | { |
| 173 | snd_hwdep_t *hw = file->private_data; |
| 174 | if (hw->ops.poll) |
| 175 | return hw->ops.poll(hw, file, wait); |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | static int snd_hwdep_info(snd_hwdep_t *hw, snd_hwdep_info_t __user *_info) |
| 180 | { |
| 181 | snd_hwdep_info_t info; |
| 182 | |
| 183 | memset(&info, 0, sizeof(info)); |
| 184 | info.card = hw->card->number; |
| 185 | strlcpy(info.id, hw->id, sizeof(info.id)); |
| 186 | strlcpy(info.name, hw->name, sizeof(info.name)); |
| 187 | info.iface = hw->iface; |
| 188 | if (copy_to_user(_info, &info, sizeof(info))) |
| 189 | return -EFAULT; |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | static int snd_hwdep_dsp_status(snd_hwdep_t *hw, snd_hwdep_dsp_status_t __user *_info) |
| 194 | { |
| 195 | snd_hwdep_dsp_status_t info; |
| 196 | int err; |
| 197 | |
| 198 | if (! hw->ops.dsp_status) |
| 199 | return -ENXIO; |
| 200 | memset(&info, 0, sizeof(info)); |
| 201 | info.dsp_loaded = hw->dsp_loaded; |
| 202 | if ((err = hw->ops.dsp_status(hw, &info)) < 0) |
| 203 | return err; |
| 204 | if (copy_to_user(_info, &info, sizeof(info))) |
| 205 | return -EFAULT; |
| 206 | return 0; |
| 207 | } |
| 208 | |
| 209 | static int snd_hwdep_dsp_load(snd_hwdep_t *hw, snd_hwdep_dsp_image_t __user *_info) |
| 210 | { |
| 211 | snd_hwdep_dsp_image_t info; |
| 212 | int err; |
| 213 | |
| 214 | if (! hw->ops.dsp_load) |
| 215 | return -ENXIO; |
| 216 | memset(&info, 0, sizeof(info)); |
| 217 | if (copy_from_user(&info, _info, sizeof(info))) |
| 218 | return -EFAULT; |
| 219 | /* check whether the dsp was already loaded */ |
| 220 | if (hw->dsp_loaded & (1 << info.index)) |
| 221 | return -EBUSY; |
| 222 | if (!access_ok(VERIFY_READ, info.image, info.length)) |
| 223 | return -EFAULT; |
| 224 | err = hw->ops.dsp_load(hw, &info); |
| 225 | if (err < 0) |
| 226 | return err; |
| 227 | hw->dsp_loaded |= (1 << info.index); |
| 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | static long snd_hwdep_ioctl(struct file * file, unsigned int cmd, unsigned long arg) |
| 232 | { |
| 233 | snd_hwdep_t *hw = file->private_data; |
| 234 | void __user *argp = (void __user *)arg; |
| 235 | switch (cmd) { |
| 236 | case SNDRV_HWDEP_IOCTL_PVERSION: |
| 237 | return put_user(SNDRV_HWDEP_VERSION, (int __user *)argp); |
| 238 | case SNDRV_HWDEP_IOCTL_INFO: |
| 239 | return snd_hwdep_info(hw, argp); |
| 240 | case SNDRV_HWDEP_IOCTL_DSP_STATUS: |
| 241 | return snd_hwdep_dsp_status(hw, argp); |
| 242 | case SNDRV_HWDEP_IOCTL_DSP_LOAD: |
| 243 | return snd_hwdep_dsp_load(hw, argp); |
| 244 | } |
| 245 | if (hw->ops.ioctl) |
| 246 | return hw->ops.ioctl(hw, file, cmd, arg); |
| 247 | return -ENOTTY; |
| 248 | } |
| 249 | |
| 250 | static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma) |
| 251 | { |
| 252 | snd_hwdep_t *hw = file->private_data; |
| 253 | if (hw->ops.mmap) |
| 254 | return hw->ops.mmap(hw, file, vma); |
| 255 | return -ENXIO; |
| 256 | } |
| 257 | |
| 258 | static int snd_hwdep_control_ioctl(snd_card_t * card, snd_ctl_file_t * control, |
| 259 | unsigned int cmd, unsigned long arg) |
| 260 | { |
| 261 | unsigned int tmp; |
| 262 | |
| 263 | tmp = card->number * SNDRV_MINOR_HWDEPS; |
| 264 | switch (cmd) { |
| 265 | case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE: |
| 266 | { |
| 267 | int device; |
| 268 | |
| 269 | if (get_user(device, (int __user *)arg)) |
| 270 | return -EFAULT; |
| 271 | device = device < 0 ? 0 : device + 1; |
| 272 | while (device < SNDRV_MINOR_HWDEPS) { |
| 273 | if (snd_hwdep_devices[tmp + device]) |
| 274 | break; |
| 275 | device++; |
| 276 | } |
| 277 | if (device >= SNDRV_MINOR_HWDEPS) |
| 278 | device = -1; |
| 279 | if (put_user(device, (int __user *)arg)) |
| 280 | return -EFAULT; |
| 281 | return 0; |
| 282 | } |
| 283 | case SNDRV_CTL_IOCTL_HWDEP_INFO: |
| 284 | { |
| 285 | snd_hwdep_info_t __user *info = (snd_hwdep_info_t __user *)arg; |
| 286 | int device; |
| 287 | snd_hwdep_t *hwdep; |
| 288 | |
| 289 | if (get_user(device, &info->device)) |
| 290 | return -EFAULT; |
| 291 | if (device < 0 || device >= SNDRV_MINOR_HWDEPS) |
| 292 | return -ENXIO; |
| 293 | hwdep = snd_hwdep_devices[tmp + device]; |
| 294 | if (hwdep == NULL) |
| 295 | return -ENXIO; |
| 296 | return snd_hwdep_info(hwdep, info); |
| 297 | } |
| 298 | } |
| 299 | return -ENOIOCTLCMD; |
| 300 | } |
| 301 | |
| 302 | #ifdef CONFIG_COMPAT |
| 303 | #include "hwdep_compat.c" |
| 304 | #else |
| 305 | #define snd_hwdep_ioctl_compat NULL |
| 306 | #endif |
| 307 | |
| 308 | /* |
| 309 | |
| 310 | */ |
| 311 | |
| 312 | static struct file_operations snd_hwdep_f_ops = |
| 313 | { |
| 314 | .owner = THIS_MODULE, |
| 315 | .llseek = snd_hwdep_llseek, |
| 316 | .read = snd_hwdep_read, |
| 317 | .write = snd_hwdep_write, |
| 318 | .open = snd_hwdep_open, |
| 319 | .release = snd_hwdep_release, |
| 320 | .poll = snd_hwdep_poll, |
| 321 | .unlocked_ioctl = snd_hwdep_ioctl, |
| 322 | .compat_ioctl = snd_hwdep_ioctl_compat, |
| 323 | .mmap = snd_hwdep_mmap, |
| 324 | }; |
| 325 | |
| 326 | static snd_minor_t snd_hwdep_reg = |
| 327 | { |
| 328 | .comment = "hardware dependent", |
| 329 | .f_ops = &snd_hwdep_f_ops, |
| 330 | }; |
| 331 | |
| 332 | /** |
| 333 | * snd_hwdep_new - create a new hwdep instance |
| 334 | * @card: the card instance |
| 335 | * @id: the id string |
| 336 | * @device: the device index (zero-based) |
| 337 | * @rhwdep: the pointer to store the new hwdep instance |
| 338 | * |
| 339 | * Creates a new hwdep instance with the given index on the card. |
| 340 | * The callbacks (hwdep->ops) must be set on the returned instance |
| 341 | * after this call manually by the caller. |
| 342 | * |
| 343 | * Returns zero if successful, or a negative error code on failure. |
| 344 | */ |
| 345 | int snd_hwdep_new(snd_card_t * card, char *id, int device, snd_hwdep_t ** rhwdep) |
| 346 | { |
| 347 | snd_hwdep_t *hwdep; |
| 348 | int err; |
| 349 | static snd_device_ops_t ops = { |
| 350 | .dev_free = snd_hwdep_dev_free, |
| 351 | .dev_register = snd_hwdep_dev_register, |
| 352 | .dev_unregister = snd_hwdep_dev_unregister |
| 353 | }; |
| 354 | |
| 355 | snd_assert(rhwdep != NULL, return -EINVAL); |
| 356 | *rhwdep = NULL; |
| 357 | snd_assert(card != NULL, return -ENXIO); |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 358 | hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | if (hwdep == NULL) |
| 360 | return -ENOMEM; |
| 361 | hwdep->card = card; |
| 362 | hwdep->device = device; |
| 363 | if (id) { |
| 364 | strlcpy(hwdep->id, id, sizeof(hwdep->id)); |
| 365 | } |
| 366 | #ifdef CONFIG_SND_OSSEMUL |
| 367 | hwdep->oss_type = -1; |
| 368 | #endif |
| 369 | if ((err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops)) < 0) { |
| 370 | snd_hwdep_free(hwdep); |
| 371 | return err; |
| 372 | } |
| 373 | init_waitqueue_head(&hwdep->open_wait); |
| 374 | init_MUTEX(&hwdep->open_mutex); |
| 375 | *rhwdep = hwdep; |
| 376 | return 0; |
| 377 | } |
| 378 | |
| 379 | static int snd_hwdep_free(snd_hwdep_t *hwdep) |
| 380 | { |
| 381 | snd_assert(hwdep != NULL, return -ENXIO); |
| 382 | if (hwdep->private_free) |
| 383 | hwdep->private_free(hwdep); |
| 384 | kfree(hwdep); |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | static int snd_hwdep_dev_free(snd_device_t *device) |
| 389 | { |
| 390 | snd_hwdep_t *hwdep = device->device_data; |
| 391 | return snd_hwdep_free(hwdep); |
| 392 | } |
| 393 | |
| 394 | static int snd_hwdep_dev_register(snd_device_t *device) |
| 395 | { |
| 396 | snd_hwdep_t *hwdep = device->device_data; |
| 397 | int idx, err; |
| 398 | char name[32]; |
| 399 | |
| 400 | down(®ister_mutex); |
| 401 | idx = (hwdep->card->number * SNDRV_MINOR_HWDEPS) + hwdep->device; |
| 402 | if (snd_hwdep_devices[idx]) { |
| 403 | up(®ister_mutex); |
| 404 | return -EBUSY; |
| 405 | } |
| 406 | snd_hwdep_devices[idx] = hwdep; |
| 407 | sprintf(name, "hwC%iD%i", hwdep->card->number, hwdep->device); |
| 408 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP, |
| 409 | hwdep->card, hwdep->device, |
| 410 | &snd_hwdep_reg, name)) < 0) { |
| 411 | snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n", |
| 412 | hwdep->card->number, hwdep->device); |
| 413 | snd_hwdep_devices[idx] = NULL; |
| 414 | up(®ister_mutex); |
| 415 | return err; |
| 416 | } |
| 417 | #ifdef CONFIG_SND_OSSEMUL |
| 418 | hwdep->ossreg = 0; |
| 419 | if (hwdep->oss_type >= 0) { |
| 420 | if ((hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM) && (hwdep->device != 0)) { |
| 421 | snd_printk (KERN_WARNING "only hwdep device 0 can be registered as OSS direct FM device!\n"); |
| 422 | } else { |
| 423 | if (snd_register_oss_device(hwdep->oss_type, |
| 424 | hwdep->card, hwdep->device, |
| 425 | &snd_hwdep_reg, hwdep->oss_dev) < 0) { |
| 426 | snd_printk(KERN_ERR "unable to register OSS compatibility device %i:%i\n", |
| 427 | hwdep->card->number, hwdep->device); |
| 428 | } else |
| 429 | hwdep->ossreg = 1; |
| 430 | } |
| 431 | } |
| 432 | #endif |
| 433 | up(®ister_mutex); |
| 434 | return 0; |
| 435 | } |
| 436 | |
| 437 | static int snd_hwdep_dev_unregister(snd_device_t *device) |
| 438 | { |
| 439 | snd_hwdep_t *hwdep = device->device_data; |
| 440 | int idx; |
| 441 | |
| 442 | snd_assert(hwdep != NULL, return -ENXIO); |
| 443 | down(®ister_mutex); |
| 444 | idx = (hwdep->card->number * SNDRV_MINOR_HWDEPS) + hwdep->device; |
| 445 | if (snd_hwdep_devices[idx] != hwdep) { |
| 446 | up(®ister_mutex); |
| 447 | return -EINVAL; |
| 448 | } |
| 449 | #ifdef CONFIG_SND_OSSEMUL |
| 450 | if (hwdep->ossreg) |
| 451 | snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device); |
| 452 | #endif |
| 453 | snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device); |
| 454 | snd_hwdep_devices[idx] = NULL; |
| 455 | up(®ister_mutex); |
| 456 | return snd_hwdep_free(hwdep); |
| 457 | } |
| 458 | |
| 459 | /* |
| 460 | * Info interface |
| 461 | */ |
| 462 | |
| 463 | static void snd_hwdep_proc_read(snd_info_entry_t *entry, |
| 464 | snd_info_buffer_t * buffer) |
| 465 | { |
| 466 | int idx; |
| 467 | snd_hwdep_t *hwdep; |
| 468 | |
| 469 | down(®ister_mutex); |
| 470 | for (idx = 0; idx < SNDRV_CARDS * SNDRV_MINOR_HWDEPS; idx++) { |
| 471 | hwdep = snd_hwdep_devices[idx]; |
| 472 | if (hwdep == NULL) |
| 473 | continue; |
| 474 | snd_iprintf(buffer, "%02i-%02i: %s\n", |
| 475 | idx / SNDRV_MINOR_HWDEPS, |
| 476 | idx % SNDRV_MINOR_HWDEPS, |
| 477 | hwdep->name); |
| 478 | } |
| 479 | up(®ister_mutex); |
| 480 | } |
| 481 | |
| 482 | /* |
| 483 | * ENTRY functions |
| 484 | */ |
| 485 | |
| 486 | static snd_info_entry_t *snd_hwdep_proc_entry = NULL; |
| 487 | |
| 488 | static int __init alsa_hwdep_init(void) |
| 489 | { |
| 490 | snd_info_entry_t *entry; |
| 491 | |
| 492 | memset(snd_hwdep_devices, 0, sizeof(snd_hwdep_devices)); |
| 493 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) { |
| 494 | entry->c.text.read_size = 512; |
| 495 | entry->c.text.read = snd_hwdep_proc_read; |
| 496 | if (snd_info_register(entry) < 0) { |
| 497 | snd_info_free_entry(entry); |
| 498 | entry = NULL; |
| 499 | } |
| 500 | } |
| 501 | snd_hwdep_proc_entry = entry; |
| 502 | snd_ctl_register_ioctl(snd_hwdep_control_ioctl); |
| 503 | snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl); |
| 504 | return 0; |
| 505 | } |
| 506 | |
| 507 | static void __exit alsa_hwdep_exit(void) |
| 508 | { |
| 509 | snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl); |
| 510 | snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl); |
| 511 | if (snd_hwdep_proc_entry) { |
| 512 | snd_info_unregister(snd_hwdep_proc_entry); |
| 513 | snd_hwdep_proc_entry = NULL; |
| 514 | } |
| 515 | } |
| 516 | |
| 517 | module_init(alsa_hwdep_init) |
| 518 | module_exit(alsa_hwdep_exit) |
| 519 | |
| 520 | EXPORT_SYMBOL(snd_hwdep_new); |