blob: 2524e66eccdd28e0f747eb6d4ac09cba94e9f8bf [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010028#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <sound/core.h>
30#include <sound/control.h>
31#include <sound/minors.h>
32#include <sound/hwdep.h>
33#include <sound/info.h>
34
35MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
36MODULE_DESCRIPTION("Hardware dependent layer");
37MODULE_LICENSE("GPL");
38
Clemens Ladischf87135f2005-11-20 14:06:59 +010039static LIST_HEAD(snd_hwdep_devices);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010040static DEFINE_MUTEX(register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Takashi Iwaid9a98de2005-11-17 13:58:21 +010042static int snd_hwdep_free(struct snd_hwdep *hwdep);
43static int snd_hwdep_dev_free(struct snd_device *device);
44static int snd_hwdep_dev_register(struct snd_device *device);
45static int snd_hwdep_dev_unregister(struct snd_device *device);
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
Clemens Ladischf87135f2005-11-20 14:06:59 +010048static struct snd_hwdep *snd_hwdep_search(struct snd_card *card, int device)
49{
50 struct list_head *p;
51 struct snd_hwdep *hwdep;
52
53 list_for_each(p, &snd_hwdep_devices) {
54 hwdep = list_entry(p, struct snd_hwdep, list);
55 if (hwdep->card == card && hwdep->device == device)
56 return hwdep;
57 }
58 return NULL;
59}
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
61static loff_t snd_hwdep_llseek(struct file * file, loff_t offset, int orig)
62{
Takashi Iwaid9a98de2005-11-17 13:58:21 +010063 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 if (hw->ops.llseek)
65 return hw->ops.llseek(hw, file, offset, orig);
66 return -ENXIO;
67}
68
Takashi Iwaid9a98de2005-11-17 13:58:21 +010069static ssize_t snd_hwdep_read(struct file * file, char __user *buf,
70 size_t count, loff_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -070071{
Takashi Iwaid9a98de2005-11-17 13:58:21 +010072 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 if (hw->ops.read)
74 return hw->ops.read(hw, buf, count, offset);
75 return -ENXIO;
76}
77
Takashi Iwaid9a98de2005-11-17 13:58:21 +010078static ssize_t snd_hwdep_write(struct file * file, const char __user *buf,
79 size_t count, loff_t *offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -070080{
Takashi Iwaid9a98de2005-11-17 13:58:21 +010081 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 if (hw->ops.write)
83 return hw->ops.write(hw, buf, count, offset);
84 return -ENXIO;
85}
86
87static int snd_hwdep_open(struct inode *inode, struct file * file)
88{
89 int major = imajor(inode);
Takashi Iwaid9a98de2005-11-17 13:58:21 +010090 struct snd_hwdep *hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 int err;
92 wait_queue_t wait;
93
Clemens Ladischf1902862005-10-24 17:05:03 +020094 if (major == snd_major) {
Clemens Ladischf87135f2005-11-20 14:06:59 +010095 hw = snd_lookup_minor_data(iminor(inode),
96 SNDRV_DEVICE_TYPE_HWDEP);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097#ifdef CONFIG_SND_OSSEMUL
Clemens Ladischf1902862005-10-24 17:05:03 +020098 } else if (major == SOUND_MAJOR) {
Clemens Ladischf87135f2005-11-20 14:06:59 +010099 hw = snd_lookup_oss_minor_data(iminor(inode),
100 SNDRV_OSS_DEVICE_TYPE_DMFM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101#endif
Clemens Ladischf1902862005-10-24 17:05:03 +0200102 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 if (hw == NULL)
105 return -ENODEV;
106
107 if (!hw->ops.open)
108 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
110 if (!try_module_get(hw->card->module))
111 return -EFAULT;
112
113 init_waitqueue_entry(&wait, current);
114 add_wait_queue(&hw->open_wait, &wait);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100115 mutex_lock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 while (1) {
117 if (hw->exclusive && hw->used > 0) {
118 err = -EBUSY;
119 break;
120 }
121 err = hw->ops.open(hw, file);
122 if (err >= 0)
123 break;
124 if (err == -EAGAIN) {
125 if (file->f_flags & O_NONBLOCK) {
126 err = -EBUSY;
127 break;
128 }
129 } else
130 break;
131 set_current_state(TASK_INTERRUPTIBLE);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100132 mutex_unlock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 schedule();
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100134 mutex_lock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 if (signal_pending(current)) {
136 err = -ERESTARTSYS;
137 break;
138 }
139 }
140 remove_wait_queue(&hw->open_wait, &wait);
141 if (err >= 0) {
142 err = snd_card_file_add(hw->card, file);
143 if (err >= 0) {
144 file->private_data = hw;
145 hw->used++;
146 } else {
147 if (hw->ops.release)
148 hw->ops.release(hw, file);
149 }
150 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100151 mutex_unlock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 if (err < 0)
153 module_put(hw->card->module);
154 return err;
155}
156
157static int snd_hwdep_release(struct inode *inode, struct file * file)
158{
159 int err = -ENXIO;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100160 struct snd_hwdep *hw = file->private_data;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100161 mutex_lock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 if (hw->ops.release) {
163 err = hw->ops.release(hw, file);
164 wake_up(&hw->open_wait);
165 }
166 if (hw->used > 0)
167 hw->used--;
168 snd_card_file_remove(hw->card, file);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100169 mutex_unlock(&hw->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 module_put(hw->card->module);
171 return err;
172}
173
174static unsigned int snd_hwdep_poll(struct file * file, poll_table * wait)
175{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100176 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 if (hw->ops.poll)
178 return hw->ops.poll(hw, file, wait);
179 return 0;
180}
181
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100182static int snd_hwdep_info(struct snd_hwdep *hw,
183 struct snd_hwdep_info __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100185 struct snd_hwdep_info info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
187 memset(&info, 0, sizeof(info));
188 info.card = hw->card->number;
189 strlcpy(info.id, hw->id, sizeof(info.id));
190 strlcpy(info.name, hw->name, sizeof(info.name));
191 info.iface = hw->iface;
192 if (copy_to_user(_info, &info, sizeof(info)))
193 return -EFAULT;
194 return 0;
195}
196
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100197static int snd_hwdep_dsp_status(struct snd_hwdep *hw,
198 struct snd_hwdep_dsp_status __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100200 struct snd_hwdep_dsp_status info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 int err;
202
203 if (! hw->ops.dsp_status)
204 return -ENXIO;
205 memset(&info, 0, sizeof(info));
206 info.dsp_loaded = hw->dsp_loaded;
207 if ((err = hw->ops.dsp_status(hw, &info)) < 0)
208 return err;
209 if (copy_to_user(_info, &info, sizeof(info)))
210 return -EFAULT;
211 return 0;
212}
213
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100214static int snd_hwdep_dsp_load(struct snd_hwdep *hw,
215 struct snd_hwdep_dsp_image __user *_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100217 struct snd_hwdep_dsp_image info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 int err;
219
220 if (! hw->ops.dsp_load)
221 return -ENXIO;
222 memset(&info, 0, sizeof(info));
223 if (copy_from_user(&info, _info, sizeof(info)))
224 return -EFAULT;
225 /* check whether the dsp was already loaded */
226 if (hw->dsp_loaded & (1 << info.index))
227 return -EBUSY;
228 if (!access_ok(VERIFY_READ, info.image, info.length))
229 return -EFAULT;
230 err = hw->ops.dsp_load(hw, &info);
231 if (err < 0)
232 return err;
233 hw->dsp_loaded |= (1 << info.index);
234 return 0;
235}
236
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100237static long snd_hwdep_ioctl(struct file * file, unsigned int cmd,
238 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100240 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 void __user *argp = (void __user *)arg;
242 switch (cmd) {
243 case SNDRV_HWDEP_IOCTL_PVERSION:
244 return put_user(SNDRV_HWDEP_VERSION, (int __user *)argp);
245 case SNDRV_HWDEP_IOCTL_INFO:
246 return snd_hwdep_info(hw, argp);
247 case SNDRV_HWDEP_IOCTL_DSP_STATUS:
248 return snd_hwdep_dsp_status(hw, argp);
249 case SNDRV_HWDEP_IOCTL_DSP_LOAD:
250 return snd_hwdep_dsp_load(hw, argp);
251 }
252 if (hw->ops.ioctl)
253 return hw->ops.ioctl(hw, file, cmd, arg);
254 return -ENOTTY;
255}
256
257static int snd_hwdep_mmap(struct file * file, struct vm_area_struct * vma)
258{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100259 struct snd_hwdep *hw = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 if (hw->ops.mmap)
261 return hw->ops.mmap(hw, file, vma);
262 return -ENXIO;
263}
264
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100265static int snd_hwdep_control_ioctl(struct snd_card *card,
266 struct snd_ctl_file * control,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 unsigned int cmd, unsigned long arg)
268{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 switch (cmd) {
270 case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE:
271 {
272 int device;
273
274 if (get_user(device, (int __user *)arg))
275 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100276 mutex_lock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 device = device < 0 ? 0 : device + 1;
278 while (device < SNDRV_MINOR_HWDEPS) {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100279 if (snd_hwdep_search(card, device))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 break;
281 device++;
282 }
283 if (device >= SNDRV_MINOR_HWDEPS)
284 device = -1;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100285 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 if (put_user(device, (int __user *)arg))
287 return -EFAULT;
288 return 0;
289 }
290 case SNDRV_CTL_IOCTL_HWDEP_INFO:
291 {
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100292 struct snd_hwdep_info __user *info = (struct snd_hwdep_info __user *)arg;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100293 int device, err;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100294 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
296 if (get_user(device, &info->device))
297 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100298 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100299 hwdep = snd_hwdep_search(card, device);
300 if (hwdep)
301 err = snd_hwdep_info(hwdep, info);
302 else
303 err = -ENXIO;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100304 mutex_unlock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100305 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 }
307 }
308 return -ENOIOCTLCMD;
309}
310
311#ifdef CONFIG_COMPAT
312#include "hwdep_compat.c"
313#else
314#define snd_hwdep_ioctl_compat NULL
315#endif
316
317/*
318
319 */
320
321static struct file_operations snd_hwdep_f_ops =
322{
323 .owner = THIS_MODULE,
324 .llseek = snd_hwdep_llseek,
325 .read = snd_hwdep_read,
326 .write = snd_hwdep_write,
327 .open = snd_hwdep_open,
328 .release = snd_hwdep_release,
329 .poll = snd_hwdep_poll,
330 .unlocked_ioctl = snd_hwdep_ioctl,
331 .compat_ioctl = snd_hwdep_ioctl_compat,
332 .mmap = snd_hwdep_mmap,
333};
334
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335/**
336 * snd_hwdep_new - create a new hwdep instance
337 * @card: the card instance
338 * @id: the id string
339 * @device: the device index (zero-based)
340 * @rhwdep: the pointer to store the new hwdep instance
341 *
342 * Creates a new hwdep instance with the given index on the card.
343 * The callbacks (hwdep->ops) must be set on the returned instance
344 * after this call manually by the caller.
345 *
346 * Returns zero if successful, or a negative error code on failure.
347 */
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100348int snd_hwdep_new(struct snd_card *card, char *id, int device,
349 struct snd_hwdep **rhwdep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100351 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 int err;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100353 static struct snd_device_ops ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 .dev_free = snd_hwdep_dev_free,
355 .dev_register = snd_hwdep_dev_register,
356 .dev_unregister = snd_hwdep_dev_unregister
357 };
358
359 snd_assert(rhwdep != NULL, return -EINVAL);
360 *rhwdep = NULL;
361 snd_assert(card != NULL, return -ENXIO);
Takashi Iwaica2c0962005-09-09 14:20:23 +0200362 hwdep = kzalloc(sizeof(*hwdep), GFP_KERNEL);
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100363 if (hwdep == NULL) {
364 snd_printk(KERN_ERR "hwdep: cannot allocate\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 return -ENOMEM;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100366 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 hwdep->card = card;
368 hwdep->device = device;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100369 if (id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 strlcpy(hwdep->id, id, sizeof(hwdep->id));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371#ifdef CONFIG_SND_OSSEMUL
372 hwdep->oss_type = -1;
373#endif
374 if ((err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops)) < 0) {
375 snd_hwdep_free(hwdep);
376 return err;
377 }
378 init_waitqueue_head(&hwdep->open_wait);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100379 mutex_init(&hwdep->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 *rhwdep = hwdep;
381 return 0;
382}
383
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100384static int snd_hwdep_free(struct snd_hwdep *hwdep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385{
386 snd_assert(hwdep != NULL, return -ENXIO);
387 if (hwdep->private_free)
388 hwdep->private_free(hwdep);
389 kfree(hwdep);
390 return 0;
391}
392
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100393static int snd_hwdep_dev_free(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100395 struct snd_hwdep *hwdep = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 return snd_hwdep_free(hwdep);
397}
398
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100399static int snd_hwdep_dev_register(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100401 struct snd_hwdep *hwdep = device->device_data;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100402 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 char name[32];
404
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100405 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100406 if (snd_hwdep_search(hwdep->card, hwdep->device)) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100407 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 return -EBUSY;
409 }
Clemens Ladischf87135f2005-11-20 14:06:59 +0100410 list_add_tail(&hwdep->list, &snd_hwdep_devices);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 sprintf(name, "hwC%iD%i", hwdep->card->number, hwdep->device);
412 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP,
413 hwdep->card, hwdep->device,
Clemens Ladischf87135f2005-11-20 14:06:59 +0100414 &snd_hwdep_f_ops, hwdep, name)) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 snd_printk(KERN_ERR "unable to register hardware dependent device %i:%i\n",
416 hwdep->card->number, hwdep->device);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100417 list_del(&hwdep->list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100418 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 return err;
420 }
421#ifdef CONFIG_SND_OSSEMUL
422 hwdep->ossreg = 0;
423 if (hwdep->oss_type >= 0) {
424 if ((hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM) && (hwdep->device != 0)) {
425 snd_printk (KERN_WARNING "only hwdep device 0 can be registered as OSS direct FM device!\n");
426 } else {
427 if (snd_register_oss_device(hwdep->oss_type,
428 hwdep->card, hwdep->device,
Clemens Ladischf87135f2005-11-20 14:06:59 +0100429 &snd_hwdep_f_ops, hwdep,
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100430 hwdep->oss_dev) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 snd_printk(KERN_ERR "unable to register OSS compatibility device %i:%i\n",
432 hwdep->card->number, hwdep->device);
433 } else
434 hwdep->ossreg = 1;
435 }
436 }
437#endif
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100438 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 return 0;
440}
441
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100442static int snd_hwdep_dev_unregister(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100444 struct snd_hwdep *hwdep = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
446 snd_assert(hwdep != NULL, return -ENXIO);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100447 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100448 if (snd_hwdep_search(hwdep->card, hwdep->device) != hwdep) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100449 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 return -EINVAL;
451 }
452#ifdef CONFIG_SND_OSSEMUL
453 if (hwdep->ossreg)
454 snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device);
455#endif
456 snd_unregister_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100457 list_del(&hwdep->list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100458 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 return snd_hwdep_free(hwdep);
460}
461
Takashi Iwaie28563c2005-12-01 10:42:42 +0100462#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463/*
464 * Info interface
465 */
466
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100467static void snd_hwdep_proc_read(struct snd_info_entry *entry,
468 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469{
Clemens Ladischf87135f2005-11-20 14:06:59 +0100470 struct list_head *p;
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100471 struct snd_hwdep *hwdep;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100473 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100474 list_for_each(p, &snd_hwdep_devices) {
475 hwdep = list_entry(p, struct snd_hwdep, list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 snd_iprintf(buffer, "%02i-%02i: %s\n",
Clemens Ladischf87135f2005-11-20 14:06:59 +0100477 hwdep->card->number, hwdep->device, hwdep->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100479 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480}
481
Takashi Iwaie28563c2005-12-01 10:42:42 +0100482static struct snd_info_entry *snd_hwdep_proc_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
Takashi Iwaie28563c2005-12-01 10:42:42 +0100484static void __init snd_hwdep_proc_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485{
Takashi Iwaid9a98de2005-11-17 13:58:21 +0100486 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 if ((entry = snd_info_create_module_entry(THIS_MODULE, "hwdep", NULL)) != NULL) {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100489 entry->c.text.read_size = PAGE_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 entry->c.text.read = snd_hwdep_proc_read;
491 if (snd_info_register(entry) < 0) {
492 snd_info_free_entry(entry);
493 entry = NULL;
494 }
495 }
496 snd_hwdep_proc_entry = entry;
Takashi Iwaie28563c2005-12-01 10:42:42 +0100497}
498
499static void __exit snd_hwdep_proc_done(void)
500{
501 snd_info_unregister(snd_hwdep_proc_entry);
502}
503#else /* !CONFIG_PROC_FS */
504#define snd_hwdep_proc_init()
505#define snd_hwdep_proc_done()
506#endif /* CONFIG_PROC_FS */
507
508
509/*
510 * ENTRY functions
511 */
512
513static int __init alsa_hwdep_init(void)
514{
515 snd_hwdep_proc_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 snd_ctl_register_ioctl(snd_hwdep_control_ioctl);
517 snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl);
518 return 0;
519}
520
521static void __exit alsa_hwdep_exit(void)
522{
523 snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl);
524 snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl);
Takashi Iwaie28563c2005-12-01 10:42:42 +0100525 snd_hwdep_proc_done();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526}
527
528module_init(alsa_hwdep_init)
529module_exit(alsa_hwdep_exit)
530
531EXPORT_SYMBOL(snd_hwdep_new);